WORKING MACHINE

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of priority to Japanese Patent Application No. 2024-103832 filed on Jun. 27, 2024. The entire contents of this application are hereby incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to working machines each including a prime mover for driving.

2. Description of the Related Art

Working machines, such as a backhoe, in the related art include an operator's seat, a prime mover for driving (such as an internal combustion engine or an electric motor), an electronic control unit that controls the prime mover, a partition wall provided between the operator's seat and the prime mover, and a hood covering the prime mover. Thus, in a working machine of this type, the partition wall and the hood define a machine room containing the prime mover, and the partition wall separates an operator's room including the operator's seat from the machine room (for example, Japanese Unexamined Patent Application Publication No. 2023-175890).

SUMMARY OF THE INVENTION

The electronic control unit is connected to the prime mover via a wire, such as a harness, in order to control the prime mover. In line with this, it is preferable that the electronic control unit be provided in the vicinity of the prime mover in order to improve workability in routing of the wire and to eliminate or reduce the likelihood of disconnection.

However, the electronic component, when provided in the vicinity of the prime mover, may be affected by heat generated by the prime mover during driving and equipment auxiliary to the prime mover, and may break or malfunction. In line with this, to date, the electronic control unit has been provided at a place where the electronic control unit is not likely to be affected by heat of the prime mover and the like, that is, a place away from the machine room, in order to eliminate or reduce the likelihood of breakage and malfunction.

Example embodiments of the present invention provide working machines each of which can reduce the effect of heat of a prime mover during driving on an electronic control unit that controls the prime mover even when the electronic control unit is provided near the prime mover.

A working machine according to an example embodiment of the present invention includes a machine body including a frame, an operator's seat supported by the frame, a prime mover room to house a prime mover supported by the frame, the prime mover room and the operator's seat being arranged in a first direction, a unit room to house an electronic control unit to control the prime mover, the unit room and the prime mover room being arranged in a second direction which intersects the first direction, a first partition wall to divide a space above the frame into the prime mover room and an operator's seat-side space on the same side of the prime mover room as the operator's seat such that the prime mover room and the operator's seat-side space are arranged in the first direction, and a second partition wall, including an edge portion in close contact with the first partition wall, to separate the prime mover room from the unit room.

The working machine according to an example embodiment of the present invention may further include a partition wall body including the second partition wall. The partition wall body may include a bottom wall which extends from a lower edge portion of the second partition wall toward the unit room and which is in close contact with the first partition wall at a side where the operator's seat is present.

The working machine according to another example embodiment of the present invention may, further include an exterior body to cover a machine room including the prime mover room and the unit room, and a separation wall portion which is in close contact with an edge portion of the second partition wall that is different from the edge portion of the second partition wall in close contact with the first partition wall and the lower edge portion of the second partition wall and which extends in the same direction as the bottom wall. The exterior body may include a first exterior cover which is located on one of opposite sides in the second direction of the second partition wall, which faces the second partition wall with a space therebetween, which covers the electronic control unit in the unit room at the one of opposite sides in the second direction of the electronic control unit, and which is configured to be in close contact with the separation wall portion.

The electronic control unit may be fixed to the second partition wall.

The second partition wall may include a metal plate.

The exterior body may include a second exterior cover to cover equipment on the frame from the other of the opposite sides in the second direction of the equipment at the opposite side of the equipment from the first exterior cover in the second direction. The second exterior cover may include an air intake hole to allow outside air to enter the prime mover room therethrough.

The frame may include a base plate to support the operator's seat and the prime mover. The base plate may include an air exhaust hole to allow air in the prime mover room to be discharged therethrough.

The working machine according to a further example embodiment of the present invention may further include a forced-air-cooled radiator provided in the prime mover room to cool the prime mover. The forced-air-cooled radiator may be provided on the same side of the prime mover as the second exterior cover.

The working machine according to still a further example embodiment of the present invention may further include a heat insulation body on a surface of the second partition wall that faces toward the prime mover room, the heat insulation body being configured to prevent or reduce heat transfer from the prime mover room toward the unit room.

The electronic control unit may be fixed to the second partition wall. The heat insulation body may be provided at least in a region of the second partition wall that overlaps the electronic control unit.

The second partition wall may include a wire hole to allow a wire connecting the prime mover and the electronic control unit to extend therethrough between the prime mover room and the unit room, and include a sealing body to seal a gap between an outer periphery of the wire and an inner periphery of the wire hole.

The sealing body may include a cover body to cover a side of the wire hole that faces the unit room, the cover body including a wire insertion portion to allow the wire to extend outward therethrough in a direction perpendicular to the second direction, and a grommet fitted to the wire insertion portion and configured to allow the wire to be inserted therethrough.

The above and other elements, features, steps, characteristics and advantages of the present invention will become more apparent from the following detailed description of the example embodiments with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of example embodiments of the present invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings described below.

FIG. 1 is front perspective view of a working machine according to an example embodiment of the present invention.

FIG. 2 is a rear perspective view of the working machine according to an example embodiment of the present invention.

FIG. 3 is a partially-exploded front perspective view of the working machine according to an example embodiment of the present invention.

FIG. 4 is a sectional view of a first partition wall of the working machine according to an example embodiment of the present invention, including the arrangement of an operator's seat and a prime mover.

FIG. 5 is a partial enlarged sectional view of a machine room (first machine room) of the working machine according to an example embodiment of the present invention.

FIG. 6 is a perspective view of the first partition wall and a second partition wall of the working machine according to an example embodiment of the present invention attached to a support frame.

FIG. 7 is a side view of the first partition wall and the second partition wall of the working machine according to an example embodiment of the present invention attached to the support frame.

FIG. 8 is an exploded perspective view of the first partition wall and the second partition wall of the working machine according to an example embodiment of the present invention.

FIG. 9 is a plan view of a swivel base that is a frame of the working machine according to an example embodiment of the present invention.

FIG. 10 is an enlarged view of a portion X of FIG. 3.

FIG. 11 is a schematic perspective view of the support frame of the working machine according to an example embodiment of the present invention.

FIG. 12 is an exploded perspective view of a main portion, including a partition wall body (the second partition wall), of the working machine according to an example embodiment of the present invention.

FIG. 13 is a schematic sectional view illustrating how a wire is inserted through a wire hole in the first partition wall (wall body) of the working machine according to an example embodiment of the present invention.

FIG. 14 is a partial perspective view of a main portion of the working machine according to an example embodiment of the present invention from which a first exterior portion is removed.

DETAILED DESCRIPTION OF THE EXAMPLE EMBODIMENTS

Example embodiments will now be described with reference to the accompanying drawings, wherein like reference numerals designate corresponding or identical elements throughout the various drawings. The drawings are to be viewed in an orientation in which the reference numerals are viewed correctly.

Hereafter, a working machine according to example embodiments of the present invention will be described with reference to the drawings. As described below in detail, because the working machine according to the present example embodiment can travel, in the following description, a direction in which a working device moves straightly (direction in which the working device moves forward and rearward) will be referred to as the front-rear direction and a direction perpendicular to the front-rear direction will be referred to as the lateral direction. However, the front-rear direction may be also referred to as a first direction and the lateral direction may be also referred to as a second direction. A normal position of the working machine is a position in which a working device (described below) is provided forward in the forward movement direction, and the following description will be made with respect to the normal position.

As illustrated in FIGS. 1 to 3, a working machine 1 includes a machine body 2 including a frame 21. The working machine 1 includes a traveling device 3 that supports the machine body 2 in such a way that the machine body 2 can travel. The working machine 1 includes a working device 4 that performs a predetermined work and that is supported by the machine body 2. The working machine 1 according to the present example embodiment allows an operator to sit thereon, and includes an operator's seat 10 supported by the frame 21. The working machine 1 includes a prime mover 5 that directly or indirectly drives the traveling device 3, that is arranged in the front-rear direction (first direction) of the operator's seat 10, and that is supported by the frame 21. In line with this, the working machine 1 includes an electronic control unit 6 that controls the prime mover 5 and a wire PL that connects the prime mover 5 and the electronic control unit 6. The working machine 1 includes an exterior body 7 that covers the prime mover 5 and equipment 50, 51, 52, 53, 54, and T on the frame 21.

As illustrated in FIG. 4, the working machine 1 includes a first partition wall 8 provided between the operator's seat 10 and the prime mover 5. The first partition wall 8 divides the space above the frame 21 into an operator's room DR including the operator's seat (operator's seat 10-side space) and a machine room MR including the prime mover 5 (prime mover room MR1a-side space on the opposite side of the first partition wall 8 from the operator's seat 10, described later) such that the operator's room DR and the machine room MR are arranged in the first direction. As illustrated in FIG. 5, in the present example embodiment, the working machine 1 includes a second partition wall 90 that has an edge portion in close contact with the first partition wall 8 and that divides the machine room MR into the prime mover room MR1a including the prime mover 5 and a unit room MR1b including the electronic control unit 6 such that the prime mover room MR1a and the unit room MR1b are arranged in the second direction perpendicular to the first direction. In line with this, as illustrated in FIGS. 6 to 8, the working machine 1 includes a support frame 22 that supports the first partition wall 8 and the second partition wall 90. The gap between the first partition wall 8 and the second partition wall 90 may be made airtight by welding the edge portion of the second partition wall 90 to the first partition wall 8, or the gap between the first partition wall 8 and the second partition wall 90 may be made airtight by interposing a sealing material (not shown) between the edge portion of the second partition wall 90 and the first partition wall 8.

The traveling device 3, the working device 4, and the prime mover 5 will be described before describing the machine body 2. As illustrated in FIGS. 1 to 3, the working machine 1 according to the present example embodiment includes a pair of traveling devices 3. The pair of traveling devices 3 are provided on both sides of the machine body 2 in the lateral direction.

In the present example embodiment, a crawler traveling device is used as each of the pair of traveling devices 3. However, the traveling device 3 may be a tire traveling device. The traveling device 3 includes a travel motor as a driving source. In the present example embodiment, the travel motor is a hydraulic motor that receives supply of a hydraulic fluid from a hydraulic system including a hydraulic pump P driven by the prime mover 5.

The working machine 1 according to the present example embodiment is a backhoe and includes a shovel device 4a (digging device) and a dozer device 4b each as the working device 4. The working device 4 (the shovel device 4a, the dozer device 4b) includes a hydraulic actuator, and as with the travel motor, the hydraulic actuator is connected to the hydraulic system including the hydraulic pump P.

In the present example embodiment, the prime mover 5 is a diesel engine. Although a diesel engine is used as the prime mover 5 in the present example embodiment, the prime mover 5 is not limited to this and may be another internal combustion engine such as a gasoline engine, an LPG engine, or a hydrogen engine. The prime mover 5 is not limited to an internal combustion engine, and may be an electric motor. The electronic control unit 6 is generally called an ECU.

In the present example embodiment, the working machine 1 includes, as equipment auxiliary to the prime mover 5, a DPF 50 (Diesel Particulate Filter) that collects PM (Particulate Matter) included in exhaust gas and automatically burns PF (performs DPF restoration), a radiator 51 that cools the diesel engine, a fuel tank 54, and the like (see FIG. 2).

The machine body 2 includes a travel base 20 to which the traveling device 3 is coupled, a swivel base 21 that is the frame 21 provided above the travel base 20, a swivel bearing B (see FIG. 9) that is annular and interposed between the travel base 20 and the swivel base 21, an operator's seat protector 23 that is provided on the swivel base 21 and defines the operator's room DR (operator's space).

The traveling device 3 is coupled to each of two side ends of the travel base 20 in the lateral direction, and the dozer device 4b of the working device 4 is coupled to a front end portion of the travel base 20 in the front-rear direction.

As illustrated in FIG. 9, the swivel base 21 includes a base plate 210 and a device support body 211 that supports the working device 4 and that is attached to the base plate 210.

The base plate 210 supports at least the operator's seat 10 and the prime mover 5. The base plate 210 is a metal plate and extends in the front-rear direction and the lateral direction. The base plate 210 has a lower placement surface that is placed on the swivel bearing B. In the base plate 210 of the present example embodiment, edges (side edges) on both sides in the lateral direction linearly extend in the front-rear direction, an edge (front edge) forward in the front-rear direction linearly extends substantially in the lateral direction, and an edge (rear edge) rearward in the front-rear direction linearly extends substantially in the lateral direction.

In the entire region A of the base plate 210 (the upper surface entire region A as seen from above) according to the present example embodiment, a region forward in the front-rear direction and on the other of opposite sides in the lateral direction (left side) is set as a first region A1 on which the operator's seat 10 and the operator's seat protector 23 are provided, a region rearward of the first region A1 in the front-rear direction is set as a second region A2 on which the prime mover 5 is provided, and a region on one (right) side of the first region A1 and the second region A2 in the lateral direction is set as a third region A3 on which the fuel tank 54 for storing the fuel of the prime mover 5 (internal combustion engine), a hydraulic fluid tank T for storing the hydraulic fluid of the hydraulic system, and the like are provided.

To be specific, the first region A1 is quadrangular in plan view. That is, the first region A1 extends from an edge (front edge) of the base plate 210 of a front one of opposite portions in the front-rear direction to a position separated rearward in the front-rear direction by a predetermined distance (in the present example embodiment, a position rearward in the front-rear direction of a center line of the base plate 210 extending in the lateral direction). A first boundary line L1, which is the boundary between the first region A1 and the second region A2, linearly extends in the lateral direction at that position. Moreover, the first region A1 extends from an edge of the base plate 210 on the other of opposite sides in the lateral direction (left side) to a position separated toward one of opposite sides in the lateral direction (right side) by a predetermined distance (in the present example embodiment, a position beyond, toward one of opposite sides in the lateral direction (right side), a center line of the base plate 210 extending in the front-rear direction). A second boundary line L2, which is the boundary between the first and second regions A1 and A2 and the third region A3, linearly extends in the front-rear direction at that position.

The size of the second region A2 in the front-rear direction (the distance from a rear edge of the base plate 210 in the front-rear direction to the first boundary line L1) is a size such that the equipment 5, 50, 51, 52, and 53 to be placed can be provided thereon. The size of the third region A3 in the lateral direction (the distance from an edge of the base plate 210 on one of opposite sides in the lateral direction to the second boundary line L2) is a size such that the equipment to be placed can be provided thereon. That is, the first region A1 is set in such a way as to leave a space (the second region A2 and the third region A3) on which the equipment 5, 50, 51, 52, and 53 to be placed on the base plate 210 can be provided.

The second region A2 of the base plate 210 has an opening 210a extending therethrough in the up-down direction. In the present example embodiment, a perforated metal 212 having a plurality of holes (elongated holes) 212a arranged in the front-rear direction and the lateral direction is provided in the opening 210a of the second region A2. The opening 210a of the second region A2 (in the present example embodiment, the plurality of holes (elongated holes) 212a of the perforated metal 212) is an air exhaust hole for discharging (exhausting) heat generated by the equipment 5, 50, 51, and 52 such as the prime mover 5 provided on the second region A2. That is, the base plate 210 has the air exhaust hole 210a (212a) to allow air in the prime mover room MR1a to be discharged therethrough.

In the swivel base 21, a separation wall 213 stands on the first boundary line L1 of the base plate 210. That is, the separation wall 213 separates the first region A1 from the second region A2 in the front-rear direction. The swivel base 21 includes frame receivers 214 and 215 that receive the support frame 22 that assembles (supports) the first partition wall 8 and the second partition wall 90. In the present example embodiment, the frame receivers 214 and 215 are provided at two positions on the first boundary line L1 and two positions on an edge (rear end) of the base plate 210 rearward in the front-rear direction.

Two of the frame receivers 214 forward (at the front) in the front-rear direction (hereafter, referred to as front frame receivers) are provided with a distance therebetween in the lateral direction, and two of the frame receivers 215 rearward (at the rear) in the front-rear direction (hereafter, referred to as rear frame receivers) are provided with a distance therebetween in the lateral direction. The two front frame receivers 214 on the first boundary line L1 are attached to an upper end of the separation wall 213 and are provided at positions that are separated upward by a predetermined distance in the up-down direction from an upper surface of the base plate 210. The two rear frame receivers 215 on the rear end of the base plate 210 are attached to upper ends of strut members 216 standing on the base plate 210. In the present example embodiment, the distance from the upper surface of the base plate 210 to the upper surfaces (receiving surfaces) of the front frame receivers 214 in the up-down direction and the distance from the upper surface of the base plate 210 to the upper surfaces (receiving surfaces) of the rear frame receivers 215 in the up-down direction are the same or substantially the same. That is, the height of the strut members 216 in the up-down direction corresponds to the height of the separation wall 213 in the up-down direction.

On the first region A1, a step 24, which is included in the floor (floor board) of the operator's room DR defined by the operator's seat protector 23, is provided (see FIG. 3). The step 24 is provided at an upper position separated by a predetermined distance from the upper surface of the base plate 210. In the present example embodiment, a rear end portion of the step 24 in the front-rear direction is supported by the front frame receivers 214. That is, the front frame receivers 214 support the step 24 in addition to the support frame 22. In line with this, a step support member 217 that supports a front end portion of the step 24 in the front-rear direction at a height position that is the same as or substantially the same as that of the rear end portion is attached to a front end portion of the base plate 210 in the front-rear direction.

The device support body 211 includes a device coupler 211a to which the working device 4 is coupled. The device support body 211 is coupled to an end portion (front end portion) of the base plate 210 forward in the front-rear direction, and positions the device coupler 211a forward of a front end of the base plate 210. In the present example embodiment, the shovel device 4a of the working device 4 is coupled to the device coupler 211a. In the normal position, the shovel device 4a extends forward of the dozer device 4b (see FIG. 1 and other figures).

As illustrated in FIG. 3, the operator's seat 10 (seat), operation equipment, and the like are provided on the step 24 (the first region A1 of the base plate 210), and the operator's seat protector 23 surrounds the operator's seat 10 and the like. That is, the operator's seat protector 23 and the step 24 define the operator's room DR in which the operator's seat 10 and the like are provided.

The operator's seat 10 is provided forward of the prime mover 5 and fixed to the step 24. As illustrated in FIG. 9, the operator's seat 10 is provided on the first region A1 (the step 24). In the present example embodiment, on the assumption that the operator's seat 10 is provided forward of the prime mover 5, the operator's seat 10 is provided in such a way as to protrude to the second region A2 when seen from above (in plan view). That is, the operator's seat 10 is provided across both of the first region A1 and the second region A2.

The prime mover 5 and equipment auxiliary to the prime mover 5 (such as the DPF 50 and the radiator 51) are provided on the second region A2 of the base plate 210 (the prime mover room MR1a in the machine room MR (a first machine room MR1)). To be specific, in the second region A2 of the base plate 210, the prime mover 5 is provided on the air exhaust hole 212a of the base plate 210, and the DPF 50 is provided above the prime mover 5. In the present example embodiment, the radiator 51 forcibly cools cooling water by receiving air sent from a fan 53 driven by the prime mover 5. In line with this, the radiator 51 is provided on one (right) side of the prime mover 5 in the lateral direction. An oil cooler 52, which cools a hydraulic fluid that flows in a hydraulic system, is arranged in the lateral direction of the radiator 51. The hydraulic pump P, which is driven by the prime mover 5, is provided on the other (left) side of the prime mover 5 in the lateral direction. That is, in the second region A2, the oil cooler 52, the radiator 51, the fan 53, the prime mover 5, and the hydraulic pump P are arranged in this order from one side toward the other side in the lateral direction. In the present example embodiment, the fan 53 is configured to draw outside air from one (right) side in the lateral direction and to send the outside air to the other (left) side (the prime mover room MR1a) and downward.

In contrast, the fuel tank 54 and the hydraulic fluid tank T are provided in a region that is included in the third region A3 and that is not likely to receive the effect of heat of the prime mover 5 and the like (in the present example embodiment, a region forward in the front-rear direction).

Referring back to FIGS. 1 to 3, the operator's seat protector 23 may be a canopy including a roof provided above the operator's seat 10 and a canopy including a strut (frame) that supports the roof. However, the operator's seat protector 23 according to the present example embodiment is a so-called cabin, and includes a roof 230 included in an upper portion of the operator's room DR and wall portions 231, 232, 233, and 234 that cover the front, rear, left, and right of the operator's seat 10. That is, the operator's seat protector 23 includes the wall portions 231, 232, 233, and 234 that separate the inside of the operator's room DR from the outside.

The operator's seat protector 23 (cabin) according to the present example embodiment includes, as wall portions: a front wall portion 231 provided forward in the front-rear direction and including a front window 231a; a rear wall portion 232 provided rearward in the front-rear direction and including a rear window 232a; a right wall portion 233 (see FIG. 2) provided on one (right) side in the lateral direction and including a side window 233a and a side wall 233b; and a left wall portion 234 (see FIGS. 1 and 3) provided on the other (left) side in the lateral direction and including a side window 234a and an access door 234b.

As illustrated in FIG. 9, in the present example embodiment, because the operator's seat 10 is provided across both of the first region A1 and the second region A2 in plan view (as seen from above), the rear wall portion 232 of the operator's seat protector 23 is provided in such a way as to protrude to the second region A2 as seen from the up-down direction. As illustrated in FIG. 3, in the operator's seat protector 23 according to the present example embodiment, a lower end portion of the rear wall portion 232 is supported, via a vibration absorbing mechanism 225, by the support frame 22 that supports the first partition wall 8 and the second partition wall 90.

Referring back to FIGS. 1 to 3, the exterior body 7 covers the entirety of the machine room MR. The exterior body 7 includes a plurality of exterior members 700, 701, 702, 710, 711, and 712, and, by combining the plurality of exterior members 700, 701, 702, 710, 711, and 712, covers and protects equipment 5, 50, 51, 52, 53, 54, and T on the base plate 210 (the second region A2, the third region A3) from above and from the sides.

The exterior body 7 covers the equipment 5, 50, 51, 52, 53, 54, and T on the swivel base 21 (the base plate 210) that is the frame 21 from above in the up-down direction and from lateral sides perpendicular to the up-down direction, and defines the machine room MR in which the equipment 5, 50, 51, 52, 53, 54, and T are accommodated.

To be more specific, in the working machine 1 according to the present example embodiment, the machine room MR includes the first machine room MR1 positioned rearward of the operator's seat protector 23 (the operator's room DR) in the front-rear direction, and a second the machine room MR2 positioned on one (right) side of the operator's seat protector 23 (the operator's room DR) in the lateral direction. That is, the machine room MR includes the first machine room MR1 corresponding to the second region A2 of the base plate 210 and the second machine room MR2 corresponding to the third region A3 of the base plate 210.

As illustrated in FIG. 5, in the present example embodiment, the first machine room MR1 includes the prime mover room MR1a in which the prime mover 5 is provided and the unit room MR1b in which the electronic control unit 6 is provided. That is, the first machine room MR1 is divided by the second partition wall 90 into the prime mover room MR1a and the unit room MR1b in the lateral direction (second direction).

As illustrated in FIGS. 1 to 3, the exterior body 7 according to the present example embodiment includes a first exterior portion 70 that defines the first machine room MR1 and a second exterior portion 71 that defines the second machine room MR2. That is, the exterior body 7 includes the first exterior portion 70 that covers the equipment 5, 6, 50, 51, 52, and 53 provided on the second region A2 of the base plate 210 and the second exterior portion 71 that covers the equipment 54 and T provided on the third region A3 of the base plate 210. The first exterior portion 70 and the second exterior portion 71 each include the plurality of exterior members 700, 701, 702, 710, 711, and 712, and define the machine room MR (the first machine room MR1, the second machine room MR2) by combining the plurality of exterior members 700, 701, 702, 710, 711, and 712. In the present example embodiment, the first exterior portion 70 and the second exterior portion 71 each include, among the plurality of exterior members 700, 701, 702, 710, 711, and 712, exterior covers 701, 710, and 711 that can rotate about an axis extending in a predetermined direction and that can be opened and closed.

As illustrated in FIGS. 1 and 3, the first exterior portion 70 (the exterior body 7) includes, among the plurality of the exterior members 700 and 701, a first exterior cover 700 that can open and close the unit room MR1b. As illustrated in FIG. 2, the first exterior portion 70 includes, among the plurality of exterior members 700, 701, and 702, a first hood 701 that can rotate about an axis extending in the lateral direction and that can be opened and closed.

To be more specific, the first exterior portion 70 includes, as the plurality of exterior members 700, 701, and 702: the first exterior cover 700 that can open and close the unit room MR1b (see FIGS. 1 and 3); an exterior member (hereafter, referred to as a rear exterior member) 702 provided along the rear wall portion 232 of the operator's seat protector 23; and a hood (hereafter, referred to as a first hood) 701 that is an exterior cover coupled to the rear exterior body 702 in such a way as to be openable and closable about a horizontal axis extending in the lateral direction. In the working machine 1 according to the present example embodiment, a balance weight 73 is attached along the rear end of the base plate 210 of the swivel base 21. Thus, the balance weight 73 is positioned below the first hood 701 in a closed state.

The first exterior cover 700 faces the second partition wall 90 with a distance therebetween on the other (left: the unit room MR1b) side in the lateral direction (second direction), and covers the electronic control unit 6 in the unit room MR1b from the other side in the second direction. The first exterior cover 700 is configured to be in close contact with at least a second portion 705 (described below, see FIG. 10) of the rear exterior body 702 on one of opposite sides in the lateral direction (second direction) via a sealing element.

The first hood 701 is provided between the first exterior cover 700 and a second exterior cover 710 (described below) in the lateral direction. In the present example embodiment, the first hood 701 is provided between the second portion 705 of the rear exterior body 702 and the second exterior cover 710, and, in a closed state, closes the gap between the second portion 705 of the rear exterior body 702 and the second exterior cover 710.

The first hood 701 is the rearmost exterior cover, and has an upper end and a lower end in the up-down direction. In the present example embodiment, the first hood 701 includes a top portion 701a that extends in the front-rear direction and that has a front end and a rear end, and a rear downwardly-extending wall portion 701b that extends downward from the rear end of the top portion 701a. In the present example embodiment, an end portion of the rear downwardly-extending wall portion 701b on the other side in in the lateral direction is curved forward. In line with this, the first hood 701 has the front end of the top portion 701a as an upper end of the first hood 701 and a lower end of the rear downwardly-extending wall portion 701b as a lower end of the first hood 701.

In line with this, a front end portion of the top portion 701a, which is an upper end portion of the first hood 701, is coupled to a first portion 704 (described below) of the rear exterior body 702 via a hinge having a lateral axis extending in the lateral direction. The position of an upper end of the balance weight 73 is set to correspond to the height of the lower end of the first hood 701 in a closed state. A lower end portion of the first hood 701 in a closed state is set to correspond to the position of an upper end portion of the balance weight 73. That is, the lower end portion of the first hood 701 in a closed state overlaps the upper end portion of the balance weight 73 from rearward in the front-rear direction.

As illustrated in FIG. 10, the rear exterior body 702 includes the first portion 704 that extends in the lateral direction and is provided along the rear wall portion 232 of the operator's seat protector 23, and the second portion 705 that extends downward from an end portion of the first portion 704 on the other side in the lateral direction.

In the rear exterior body 702, the first portion 704 closes the gap between the operator's seat protector 23 and the first hood 701 provided rearward of the operator's seat protector 23. With respect to the upper surface of the base plate 210, the first portion 704 is provided at a position higher than the highest position of the equipment 5, 50, 51, 52, 53, and P provided on the second region A2 of the base plate 210. In the present example embodiment, the first portion 704 has a curved shape that is upwardly convex in such a way that a vertex thereof is positioned at the center in the lateral direction.

The second portion 705 includes: a strip-shaped downwardly-extending wall portion 705a that extends downward from an end portion (edge) of the first portion 704 on the other side in the lateral direction, that has a long side in the downwardly-extending direction, and that has an outer surface facing toward the other side in the lateral direction; and a separation wall portion 705b that is connected to the whole area of an edge of the downwardly-extending wall portion 705a forward in the front-rear direction and that has a surface facing forward in the front-rear direction. The forward-facing surface of the separation wall portion 705b extends in the up-down direction and the lateral direction. To be specific, the separation wall portion 705b has a strip shape, has a long side in the up-down direction, and has a short side (width) in the lateral direction. The short-side direction (width direction) of the separation wall portion 705b coincides with or substantially coincides with the width direction of a bottom wall 91 of a partition wall body 9. The forward-facing surface of the separation wall portion 705b or an edge of the separation wall portion 705b on one of opposite sides in the lateral direction is in close contact with an erect end E4 (described below) of the second partition wall 90 (a wall body 90a). That is, the gap between the forward-facing surface of the separation wall portion 705b and the second partition wall 90 (the wall body 90a) is made airtight. In the present example embodiment, the airtightness is increased by interposing a sealing material 83 (not shown) between the separation wall portion 705b and the erect end E4 of the second partition wall 90. The gap between the separation wall portion 705b and the erect end E4 of the second partition wall 90 may be made airtight by welding. In the present example embodiment, the separation wall portion 705b is included as a portion (the second portion 705) of the rear exterior body 702 of the exterior body 7. However, the separation wall portion 705b may be a member independent from the exterior body 7 (the rear exterior body 702), as long as the separation wall portion 705b is configured to be in close contact with an edge portion of the second partition wall 90 that is different from the edge portion of the second partition wall 90 in close contact with the first partition wall 8 and a lower edge portion of the second partition wall 90 and to extend in the same direction as the bottom wall 91.

As illustrated in FIG. 2, the second exterior portion 71 includes a plurality of exterior members 710, 711, 712, and 713, as with the first exterior portion 70. The second exterior portion 71 (the exterior body 7) includes, among the plurality of exterior members 710, 711, 712, and 713, the second exterior cover 710 that can be opened and closed about a first axis extending in the up-down direction. The second exterior portion 71 includes, among the plurality of exterior members 710, 711, 712, and 713, a hood (hereafter, referred to as a second hood) 711 that is an exterior cover that can be opened and closed about a second axis extending in the front-rear direction perpendicular to the first axis. The second exterior cover 710 and the second hood 711 are adjacent to each other in the up-down direction. The second hood 711 is provided above the second exterior cover 710, and is adjacent to the second exterior cover 710 in the up-down direction.

In the present example embodiment, the second exterior portion 71 includes, among the plurality of exterior members 710, 711, 712, and 713, as an exterior member adjacent to the second exterior cover 710, the second hood 711 and an exterior fixed cover 712 that is adjacent to the second exterior cover 710 and the second hood 711 and that cannot be opened and closed. The second exterior portion 71 includes, among the plurality of exterior members 710, 711, 712, and 713, a side exterior body 713 adjacent to the second hood 711. That is, the second exterior portion 71 according to the present example embodiment includes, as a plurality of exterior members, the second exterior cover 710, the second hood 711, the exterior fixed cover 712, and the side exterior body 713.

The second exterior cover 710 covers equipment provided on the third region A3 of the base plate 210 from the side (one (right) side) in the lateral direction. In the present example embodiment, the second exterior cover 710 has an air intake hole 710a to allow outside air to enter the machine room MR (the prime mover room MR1a of the first machine room MR1) therethrough. A mesh (net) for preventing or reducing entry of foreign substances is provided in the air intake hole 710a.

In the present example embodiment, although the second exterior cover 710 covers the equipment on the third region A3 from the side, outside air drawn from the air intake hole 710a flows into the prime mover room MR1a of the first machine room MR1 via the third region A3 (the second machine room MR2). The second hood 711 is adjacent to the second exterior cover 710 in the up-down direction, and covers the equipment (the fuel tank 54, the hydraulic fluid tank T, and the like) provided on the third region A3 of the base plate 210 from above.

In the present example embodiment, the second exterior cover 710 and the exterior fixed cover 712 are provided adjacent to each other in the front-rear direction. In line with this, the second hood 711 is provided across both of the second exterior cover 710 and the exterior fixed cover 712. In the present example embodiment, although the exterior fixed cover 712 faces the fuel tank 54 and the hydraulic fluid tank T from the side (one (right) side in the lateral direction), other equipment is also provided in the third region A3.

Therefore, in the present example embodiment, the second exterior cover 710 covers the equipment on the third region A3 from the lateral direction and also indirectly covers the radiator 51 and the oil cooler 52 on the second region A2 from one of opposite sides in the lateral direction. In line with this, in the present example embodiment, the second exterior cover 710 and the exterior fixed cover 712 cover the equipment provided on the second region A2 and the third region A3 of the base plate 210 from the side, and the second hood 711 covers the equipment provided on the third region A3 of the base plate 210 from above.

In the present example embodiment, the exterior fixed cover 712 is provided forward of the second exterior cover 710 in the front-rear direction. The second exterior cover 710 is provided rearward of the exterior fixed cover 712. In the present example embodiment, the second exterior cover 710 and the exterior fixed cover 712 are provided along (i) one of opposite portions in the lateral direction of an edge (front edge) of a front portion of the base plate 210, (ii) one of opposite edges (side edges) of the base plate 210 in the lateral direction, and (iii) one of opposite portions in the lateral direction of an edge (rear edge) of the base plate 210 (one of opposite edges in the lateral direction that defines the third region A3). In the present example embodiment, because the balance weight 73 is provided over the entire width of the base plate 210 in the lateral direction, a lower portion of the back side of the second exterior cover 710 has a cutout such that it does not interfere with the balance weight 73.

The exterior fixed cover 712 is supported (fixed) at a certain position by a supporting frame (not shown) fixed to the base plate 210. In contrast, the second exterior cover 710 is supported to be rotatable about a first axis. In the present example embodiment, a front end portion of the second exterior cover 710 in the front-rear direction if fixed to a support body (not shown) that supports a rear end portion of the exterior fixed cover 712 in the front-rear direction via a hinge including a first axis extending in the up-down direction (predetermined direction). Thus, the second exterior cover 710 opens and closes with respect to an axis that is set adjacent to the front end in the front-rear direction. That is, the second exterior cover 710 is a side opening cover.

In a closed state, the second exterior cover 710 closes the gap between the exterior fixed cover 712 and the rear downwardly-extending wall portion 701b of the first hood 701 of the first exterior portion 70 in a closed state. The second exterior cover 710 and the exterior fixed cover 712 have exterior surfaces that are continuous in the front-rear direction. In the present example embodiment, the second exterior cover 710 and the exterior fixed cover 712 have a curved shape bulging (protruding) toward one of opposite sides in the lateral direction, and outer surfaces of these are continuous to be a side surface of the second exterior portion 71.

The second hood 711 is curved in the front-rear direction and the lateral direction, and has a vertex at a central portion in each of the front-rear direction and the lateral direction. The second hood 711 can be opened and closed about a second axis extending in a direction (front-rear direction) perpendicular to the first axis that is the rotation axis of the second exterior cover 710. In the present example embodiment, the second axis extends in the front-rear direction. In the present example embodiment, the second hood 711 closes a region surrounded by a right wall portion 233 of the operator's seat protector 23, the second exterior cover 710, and the exterior fixed cover 712. In the present example embodiment, because the second exterior portion 71 includes the side exterior body 713, the second hood 711 closes a region (opening) surrounded by the side exterior body 713, the second exterior cover 710, and the exterior fixed cover 712. Although not mentioned in the above description, in the exterior body 7 according to the present example embodiment, the sealing element is provided between the plurality of exterior members 700, 701, 702, 710, 711, 712, and 713 to keep the machine room MR airtight and liquid-tight and to eliminate or reduce the likelihood of leakage of hot air from the machine room MR and entry of rainwater into the machine room MR.

The first partition wall 8 and the second partition wall 90 are attached to the support frame 22 to be integrated. Here, the support frame 22 will be described before describing the first partition wall 8 and the second partition wall 90.

As illustrated in FIG. 11, the support frame 22 includes a pair of support legs 220 that are provided with a distance therebetween in the lateral direction and a leg coupler 221 that couples the pair of support legs 220.

Each of the pair of support legs 220 includes a front leg portion 222 provided forward, a rear leg portion 223 provided rearward of the front leg portion 222, a beam 224 extending in the front-rear direction and coupling the front leg portion 222 and the rear leg portion 223.

Lower end portions of the front leg portions 222 of the pair of support legs 220 are coupled to and supported by the two front frame receivers 214 that support a left rear corner and a right rear corner of the step 24. The front leg portions 222 include first inclined portions 222a whose lower ends are coupled to the front frame receivers 214 on the base plate 210 and that are slightly inclined upward and rearward, and second inclined portions 222b that are connected to upper ends of the first inclined portions 222a and that are inclined upward and rearward with a larger inclination angle than the first inclined portions 222a.

The rear leg portions 223 extend in the up-down direction (direction substantially perpendicular to the swivel base 21 (the base plate 210)). Lower end portions of the rear leg portions 223 of the pair of support legs 220 are coupled to and supported by the rear frame receivers 215 on the strut members 216 standing on rear end portions of the base plate 210.

Front ends of the beams 224 are connected to upper ends of the second inclined portions 222b, extend rearward in a substantially horizontal direction, and rear ends of the beams 224 are connected to upper ends of the rear leg portions 223. The height of each of the pair of support legs 220 is set to be substantially the same as the height of a corresponding one of the beams 224.

The leg coupler 221 extends in a horizontal direction (the lateral direction), one end portion of the leg coupler 221 is coupled to the beam 224 of one of the support legs 220, and the other end portion of the leg coupler 221 is coupled to the beam 224 of the other support leg 220. A lower end portion of the rear wall portion 232 of the operator's seat protector 23 is coupled to the leg coupler 221 of the support frame 22 via the vibration absorbing mechanism 225 (see FIG. 3).

The first partition wall 8 is a noise absorbing wall (noise blocking wall) for preventing or reducing transmission of noise in the prime mover room MR1a (driving noise of the prime mover 5 or the like) into the operator's room DR. As illustrated in FIG. 4, the first partition wall 8 separates the operator's room DR from the machine room MR. In the present example embodiment, the first partition wall 8 is continuous with the separation wall 213 on the base plate 210 in the up-down direction. Thus, the separation wall 213 separates the machine room MR from a region below the operator's room DR. In the present example embodiment, the first partition wall 8 is attached to the pair of support legs 220 (the front leg portions 222) of the support frame 22 (see FIG. 8). The first partition wall 8 is a double wall including a pair of metal plates 80 and 81 that face each other in a direction perpendicular to the lateral direction (direction from the prime mover room MR1a toward the operator's room DR) with a distance therebetween.

To be specific, the first partition wall 8 includes a first wall 80 provided adjacent to the operator's room DR side, a second wall 81 provided adjacent to the prime mover room MR1a, and a noise absorbing member 82 provided between the first wall 80 and the second wall 81. In the present example embodiment, the first partition wall 8 includes the sealing material 83 that has elasticity. that is interposed between the first wall 80 and the second wall 81 (a second main wall 81a (described below)), and that surrounds the noise absorbing member 82 provided between the first wall 80 and the second wall 81 (a second main wall 81a (described below))

The first wall 80 includes a single metal plate. In contrast, the second wall 81 includes two metal plates arranged in the lateral direction.

As illustrated in FIG. 6, the first wall 80 (one metal plate) spans the front leg portions 222 of the pair of support legs 220. In the present example embodiment, the width of the first wall 80 in the lateral direction is larger than the distance between the pair of support legs 220. One of the ends of the first wall 80 in the lateral direction is positioned outside of the front leg portion 222 of a corresponding one of the support legs 220 in the lateral direction. To be specific, in a state in which an edge of the first wall 80 on one (right) side in the lateral direction abuts against a surface of the support leg 220 on one (right) side in the lateral direction facing toward the other side in the lateral direction, the first wall 80 spans the pair of support legs 220 and protrudes from the other support leg 220 on the other (left) side in the lateral direction.

That is, the distance between the pair of the front leg portions 222 of the support legs 220 is set to be smaller than an area to be closed by the first partition wall 8. In relation to the pair of support legs 220, the first wall 80, which is provided in the area to be closed, protrudes outward in the lateral direction from the front leg portion 222 of the other support leg 220 on the other (left) side in the lateral direction. In the first wall 80, a portion between the pair of the front leg portions 222 of the support legs 220 will be referred to as a first main wall region 80a, and a portion protruding outward from the front leg portion 222 will be referred to as a first sub-wall region 80b.

In contrast, as illustrated in FIG. 8, the second wall 81 includes: a second main wall 81a that is provided between the pair of the front leg portions 222 of the support legs 220 and that faces the first main wall region 80a with a distance therebetween; and a second sub-wall 81b that is arranged in the lateral direction of the second main wall 81a with the front leg portion 222 of the other support leg 220 interposed therebetween and that faces the first sub-wall region 80b with a distance therebetween.

The first wall 80 includes a single metal plate, and, in the second wall 81, the second main wall 81a and the second sub-wall 81b each include a single metal plate.

Referring back to FIG. 4, in the present example embodiment, the first partition wall 8 includes a first inclined partition wall portion 8a that is inclined along the first inclined portions 222a of the support legs 220, a second inclined partition wall portion 8b that is inclined along the second inclined portions 222b of the support legs 220, and a top partition wall portion 8c that extends in the horizontal direction along the beams 224 of the support legs 220.

As illustrated in FIG. 6, the top partition wall portion 8c is provided in a region forward of the leg coupler 221. The second inclined partition wall portion 8b of the first partition wall 8 includes an access hole 800 that allows access from the operator's seat 10 to the prime mover 5 and a closing body 84 that can close the access hole 800.

In the present example embodiment, because each of the first wall 80, the second main wall 81a, and the second sub-wall 81b includes a single metal plate, as illustrated in FIG. 8, each of the metal plates of the first wall 80, the second main wall 81a, and the second sub-wall 81b is bent in accordance with the shape (inclination) of the first inclined partition wall portion 8a, the second inclined partition wall portion 8b, and the top partition wall portion 8c.

In the present example embodiment, the second sub-wall 81b of the second wall 81 is incorporated in the partition wall body 9 (described below) including the second partition wall 90. That is, the second sub-wall 81b is integrated with the second partition wall 90.

The first wall 80 and the second wall 81 are welded or screwed to the support frame 22 (support legs 220). The first wall 80 and the second wall 81 may be integrated by welding, by using a bolt, or the like, or may be independently fixed to the support frame 22.

The noise absorbing member 82 is resin foam (polyurethane foam). In the present example embodiment, the noise absorbing member 82 is in close contact with one of the first wall 80 and the second wall 81 (the second main wall 81a). In the present example embodiment, the noise absorbing member 82 is in close contact with the first wall 80. The material of the noise absorbing member 82 is not limited to this and may be other resin foam, or may be a material, other than resin foam, having noise absorbing property or noise blocking property. The noise absorbing member 82 preferably has heat insulation property that reduces transfer of heat from the prime mover room MR1a to the operator's room DR.

The access hole 800 includes a first opening 800a in the first wall 80 adjacent to the operator's seat 10, and a second opening 800b in the second wall 81 (the second main wall 81a) at a position corresponding to the first opening 800a adjacent to the prime mover 5. In the present example embodiment, the opening area of the second opening 800b is slightly smaller than that of the first opening 800a.

The closing body 84 includes: a first closing plate 84a that is made of a metal and that closes the access hole 800 in a state of overlapping a surface of a peripheral portion of the first opening 800a in the first wall 80 adjacent to the operator's seat 10; and a second closing plate 84b that is made of a metal and that closes the access hole 800 in a state of overlapping a surface of a peripheral portion of the second opening 800b in the second wall 81 (the second main wall 81a) adjacent to the operator's seat 10. The closing body 84 includes a noise absorbing member 85 interposed between the first closing plate 84a and the second closing plate 84b. In the present example embodiment the noise absorbing member 85 is in close contact with the first closing plate 84a.

A handle 840 that can be grasped is attached to the first closing plate 84a. The first closing plate 84a is screwed to the first wall 80 by using a male screw member. The second closing plate 84b is fixed to the second wall 81 (the second main wall 81a) by using a male screw member.

In the present example embodiment, a sealing element 87 to fill a gap is interposed at a portion where the first closing plate 84a and the first wall 80 face each other. As the sealing element 87, for example, resin foam, rubber, or the like can be used. The sealing element 87 may be interposed also at a portion where the second closing plate 84b and the second wall 81 (the second main wall 81a) face each other.

The noise absorbing member 85 of the closing body 84 can be fitted from the first opening 800a toward the second wall 81 (the second main wall 81a). The noise absorbing member 82 of the first partition wall 8 (the noise absorbing member 82 between the first wall 80 (the first main wall region 80a) and the second wall 81 (the second main wall 81a)) has an opening having a shape corresponding to the noise absorbing member 85 of the closing body 84. The noise absorbing members 82 and 85 are provided in substantially the entire region in a surface of the partition wall as the noise absorbing member 85 of the closing body 84 is fitted into the opening.

The second main wall 81a of the second wall 81 may have the same shape and size as the first main wall region 80a of the first wall 80. However, in the present example embodiment, the second main wall 81a and the first main wall region 80a have different shapes. To be specific, an end portion of the second wall 81 (the second main wall 81a) on the other side in the lateral direction has a cutout portion that is cut out toward one of opposite sides in the lateral direction. Therefore, the first main wall region 80a of the first wall 80 and the second main wall 81a of the second wall 81 do not entirely face each other, and the first main wall region 80a of the first wall 80 includes a non-facing region that does not face the second main wall 81a of the second wall 81. That is, the outline of the first main wall region 80a and the outline (outer periphery) of the second main wall 81a of the second wall 81 do not coincide as seen in a direction in which these are arranged.

As illustrated in FIG. 4, the second wall 81 (the second main wall 81a and the second sub-wall 81b) is a metal plate thinner than the first wall 80. That is, the plate thickness of the first wall 80 is larger than the plate thickness of the second wall 81 (the second main wall 81a). To be specific, the plate thickness of the first wall 80 is set to be larger than or equal to 1.5 times the plate thickness of the second wall 81 (the second main wall 81a). In the present example embodiment, the plate thickness of the first wall 80 is 3.2 mm, and the plate thickness of the second wall 81 (the second main wall 81a) is 2 mm. Accordingly, the plate thickness of the first wall 80 is set to be 1.6 times the plate thickness of the second wall 81 (the second main wall 81a).

The noise absorbing members 82 and 85 are provided between the first wall 80 and the second wall 81 (the second main wall 81a), form a gap between the noise absorbing members 82 and 85 and at least one of the first wall 80 and the second wall 81 (the second main wall 81a), and face the first wall 80 and the second wall 81 (the second main wall 81a). The noise absorbing member 82 is in close contact with the first wall 80, is separated from the second wall 81 (the second main wall 81a), and forms a gap G between the noise absorbing member 82 and the second wall 81 (the second main wall 81a).

To be more specific, the noise absorbing members 82 and 85 are resin foam (polyurethane foam) having a plate-like shape. The thickness of the noise absorbing member 82 is set to be smaller than the distance between the first wall 80 and the second wall 81 (the distance between the pair of metal plates 80 and 81). That is, the noise absorbing member 82 is set to have a thickness that is necessary for noise absorption and with which the noise absorbing member 82 can form the gap G between the first wall 80 and the second main wall 81a of the second wall 81 in a state of being provided between the first wall 80 and the second main wall 81a of the second wall 81.

Because a partition wall according to the present example embodiment includes a plurality of regions (the first inclined partition wall portion 8a, the second inclined partition wall portion 8b, and the top partition wall portion 8c) as described above, the noise absorbing member 82 is divided into a plurality of portions each provided in a corresponding region. That is, the first partition wall 8 includes, as the noise absorbing member 82, a plurality of divided noise absorbing members 82a, 82b, and 82c corresponding to regions in which these are provided.

To be more specific, as illustrated in FIG. 8, the noise absorbing member 82 includes, as a plurality of divided noise absorbing members 82a, 82b, and 82c, a first noise absorbing member 82a for the first inclined partition wall portion 8a, the second noise absorbing member 82b for the second inclined partition wall portion 8b, and a third noise absorbing member 82c for the top partition wall portion 8c. Moreover, because the first partition wall 8 has the access hole 800 and the closing body 84 that closes the access hole 800, the noise absorbing member 82 further includes a fourth noise absorbing member 85 for the closing body 84.

The first noise absorbing member 82a, the second noise absorbing member 82b, the third noise absorbing member 82c, and the fourth noise absorbing member 85 each have a plate-like shape and has a thickness necessary for noise absorption. The first noise absorbing member 82a, the second noise absorbing member 82b, the third noise absorbing member 82c, and the fourth noise absorbing member 85 each have a thickness with which these members can form the gap G between the first wall 80 and the second main wall 81a of the second wall 81 in a state of being provided between the first wall 80 and the second main wall 81a of the second wall 81.

The first noise absorbing member 82a and the third noise absorbing member 82c each have a substantially rectangular shape in plan view. That is, the first noise absorbing member 82a has a rectangular shape in plan view having a size slightly smaller than that of the first inclined partition wall portion 8a, and the second noise absorbing member 82b has a rectangular shape in plan view having a size slightly smaller than that of the top partition wall portion 8c. That is, the first noise absorbing member 82a is set to have a size with which the first noise absorbing member 82a can be provided in the first inclined partition wall portion 8a in a state in which a space for providing the sealing material 83 is ensured, and the third noise absorbing member 82c has a size with which the third noise absorbing member 82c can be provided in the top partition wall portion 8c in a state in which a space for providing the sealing material 83 is ensured.

In the present example embodiment, because the access hole 800 and the closing body 84 are provided in the second inclined partition wall portion 8b, the second noise absorbing member 82b is provided such that the second noise absorbing member 82b does not interfere with the access hole 800, and the fourth noise absorbing member 85 has a shape and a size corresponding to those of the opening of the access hole 800. In the present example embodiment, the second noise absorbing member 82b is provided on the other side of the access hole 800 in the lateral direction. Therefore, the second noise absorbing member 82b is shaped such that it does not interfere with the cutout portion of the second wall 81 (the second main wall 81a).

In the present example embodiment, the first noise absorbing member 82a is bonded to the first wall 80 of the first inclined partition wall portion 8a, the second noise absorbing member 82b is bonded to the first wall 80 of the second inclined partition wall portion 8b, and the third noise absorbing member 82c is bonded to the first wall 80 of the top partition wall portion 8c. The fourth noise absorbing member 85 is bonded to the first closing plate 84a of the closing body 84. That is, in the partition wall according to the present example embodiment, the noise absorbing member 82 (the first noise absorbing member 82a, the second noise absorbing member 82b, the third noise absorbing member 82c, and the fourth noise absorbing member 85) is affixed to a metal plate adjacent to the operator's room DR.

The sealing material 83 is an elongated member made of polyurethane rubber. The sealing material 83 can be bent in a direction that is perpendicular to or crosses the longitudinal direction. In the present example embodiment, the sealing material 83 has a rectangular cross-sectional shape. The outside dimension of the sealing material 83 in a direction perpendicular to the longitudinal direction is set to be larger than the distance between the first wall 80 and the second main wall 81a of the second wall 81. That is, the sealing material 83 is set to have a size such that the sealing material 83 is compressed between the first wall 80 and the second main wall 81a of the second wall 81 in a state of being provided between the first wall 80 and the second main wall 81a of the second wall 81.

In the present example embodiment, the cross-sectional shape of the sealing material 83 as seen from the longitudinal direction is a rectangular shape including four sides in the outline (outer shape) thereof. In line with this, among the four sides of the outline of the sealing material 83, the length of at least two sides extending in the same direction is set to be longer than the distance between the first wall 80 and the second main wall 81a of the second wall 81. In the present example embodiment, the cross-sectional shape of the sealing material 83 is a square, and the length of each of the four sides is set to be longer than the distance between the first wall 80 and the second main wall 81a of the second wall 81.

The sealing material 83 surrounds the noise absorbing member 82. In the present example embodiment, because the partition wall includes, as the noise absorbing member 82, the plurality of divided noise absorbing members 82a, 82b, and 82c (the first noise absorbing member 82a, the second noise absorbing member 82b, the third noise absorbing member 82c, and the fourth noise absorbing member 85), the sealing material 83 collectively surrounds all of the plurality of divided noise absorbing members 82a, 82b, 82c, and 85 (the first noise absorbing member 82a, the second noise absorbing member 82b, the third noise absorbing member 82c, and the fourth noise absorbing member 85) between the first wall 80 and the second main wall 81a of the second wall 81. That is, by being provided across a plurality of regions of the partition wall, the sealing material 83 surrounds the plurality of divided noise absorbing members 82a, 82b, 82c, and 85 (the first noise absorbing member 82a, the second noise absorbing member 82b, the third noise absorbing member 82c, and the fourth noise absorbing member 85) together.

The sealing material 83 is provided along the outer peripheral edge portion of the first wall 80 or the second wall 81. In the present example embodiment, as described above, the outlines (outer peripheries) of the first wall 80 and the second wall 81 do not coincide, and the planar area of the second wall 81 (the second main wall 81a) is smaller than the planar area of the first wall 80. That is, whereas the second wall 81 (the second main wall 81a) entirely faces the first wall 80 (the first main wall region 80a), the first wall 80 has a portion protruding from the second wall 81 (the second main wall 81a).

In line with this, in the partition wall according to the present example embodiment, the sealing material 83 is provided along the outer peripheral edge portion of the second wall 81 (the second main wall 81a) and is interposed between and in close contact with the first wall 80 and the second main wall 81a of the second wall 81. Thus, the sealing material 83 is provided in an annular shape. In other words, the sealing material 83 is provided in an annular shape between the first wall 80 and the second main wall 81a of the second wall 81, and the noise absorbing member 82 (to be more specific, the plurality of divided noise absorbing members 82a, 82b, and 82c) is provided in a region surrounded by the sealing material 83.

As illustrated in FIG. 5, the second partition wall 90 divides the machine room MR (in the present example embodiment, the first machine room MR1) into two regions in the second direction. That is, the second partition wall 90 divides the machine room MR (in the present example embodiment, the first machine room MR1) into the prime mover room MR1a in which the prime mover 5 is provided and the unit room MR1b in which the electronic control unit 6 is provided.

In the present example embodiment, the second partition wall 90 is a plate extending in the front-rear direction and the up-down direction, and is provided along a surface of one of the support legs 220 on the other (left) side in the lateral direction facing toward the other (left) side in the lateral direction. Thus, the prime mover room MR1a is on one (right) side of the second partition wall 90 in the lateral direction, and the unit room MR1b is on the other (left) side of the second partition wall 90 in the lateral direction.

To be more specific, as illustrated in FIG. 12, the second partition wall 90 includes a wall body 90a including a single metal plate and a bracket 90b that is attached to a surface of the wall body 90a adjacent to the unit room MR1b and to which the electronic control unit 6 is fixed. The second partition wall 90 (the wall body 90a) includes a wire hole 900 to allow the wire PL to extend therethrough between the prime mover room MR1a and the unit room MR1b. In line with this, the second partition wall 90 includes a sealing body 93 that seals the gap between the outer periphery of the wire PL and the inner periphery of the wire hole 900.

The working machine 1 according to the present example embodiment includes the partition wall body 9 including the second partition wall 90. The partition wall body 9 includes the second sub-wall 81b in addition to the second partition wall 90.

As illustrated in FIG. 12, in the second partition wall 90 according to the present example embodiment, the wall body 90a is provided in such a way as to extend in the front-rear direction and the up-down direction. In the partition wall body 9, an edge of the second partition wall 90 adjacent to the operator's seat 10 is connected to an edge the second sub-wall 81b on one of opposite sides in the lateral direction. That is, the edge of the second partition wall 90 adjacent to the operator's seat 10 extends along a surface of the second sub-wall 81b adjacent to the machine room MR. To be specific, the edge of the second partition wall 90 adjacent to the operator's seat 10 includes a first inclined end E1 extending along the second sub-wall 81b of the first inclined partition wall portion 8a, a second inclined end E2 continuous with the first inclined end E1 and extending along the second sub-wall 81b of the second inclined partition wall portion 8b, and a horizontal end E3 continuous with the second inclined end E2 and extending along the second sub-wall 81b of the top partition wall portion 8c.

In line with this, the first inclined end E1 is connected to an edge of the second sub-wall 81b of the first inclined partition wall portion 8a on one of opposite sides in the lateral direction, the second inclined end E2 is connected to an edge of the second sub-wall 81b of the second inclined partition wall portion 8b on one of opposite sides in the lateral direction, and the horizontal end E3 is connected to an edge of the second sub-wall 81b of the top partition wall portion 8c on one of opposite sides in the lateral direction. Thus, the second partition wall 90 is in close contact with the second sub-wall 81b of the second wall 81 adjacent to the operator's seat 10.

Moreover, the second partition wall 90 includes, as edges adjacent to the machine room MR, the erect end E4 continuous with an end (rear end) of the horizontal end E3 rearward in the front-rear direction and extending in the up-down direction, and a lower edge E5 connecting a lower end of the second inclined end E2 and a lower end of the erect end E4 and extending in the front-rear direction. In the present example embodiment, the lower edge E5 of the second partition wall 90 (the wall body 90a) includes a linear edge E5a extending linearly rearward in the front-rear direction from a lower end the first inclined end E1, and an inclined edge E5b extending rearward and upward from a rear end of the linear edge E5a and connected to a lower end of the erect end E4.

The partition wall body 9 includes the bottom wall 91 which extends in the lateral direction from the lower edge E5 of the second partition wall 90. That is, the partition wall body 9 includes the bottom wall 91 which extends from the lower edge E5 of the second partition wall 90 (the linear edge E5a and the inclined edge E5b) toward the unit room MR1b and which is in close contact with the first partition wall 8 at a side where the operator's seat is present (in close contact with the surface of the first partition wall 8 that faces the machine room MR). A forward one of opposite edges of the bottom wall 91 in the front-rear direction is connected to a lower edge of the second sub-wall 81b (the second sub-wall 81b of the first inclined partition wall portion 8a). As described above, because the lower edge E5 of the second partition wall 90 includes the linear edge E5a and the inclined edge E5b, the bottom wall 91 is bent at an intermediate position in the front-rear direction (a position corresponding to a position where the linear edge E5a and the inclined edge E5b are connected).

The partition wall body 9 is fixed to the support leg 220 on the other (left) side in the lateral direction. To be specific, because the second partition wall 90 is a portion of the partition wall body 9, the partition wall body 9 is fixed to the support leg 220 on the other (left) side in the lateral direction in such a way as to overlap the support leg 220 from the other side in the lateral direction in a state in which the first inclined end E1, the second inclined end E2, and the horizontal end E3 of the second partition wall 90 extend along the support leg 220 on the other side. In the present example embodiment, in a manner described above, the second sub-wall 81b faces the first sub-wall region 80b of the first wall 80 with a distance therebetween. In the present example embodiment, as illustrated in FIGS. 7 and 8, a vibration damping member 86 is provided between the first sub-wall region 80b of the first wall 80 and the second sub-wall 81b. The vibration damping member 86 is a plate-shaped elastic material interposed between the second sub-wall 81b and the first sub-wall region 80b of the first wall 80.

As described above, as illustrated in FIG. 10, in a state in which the second partition wall 90 (the partition wall body 9) is fixed to the support leg 220 on the other (left) side in the lateral direction, the erect end E4 of the second partition wall 90 is in close contact with a surface the second portion 705 (the separation wall portion 705b) of the rear exterior body 702 facing forward in the front-rear direction with a sealing element therebetween. The first exterior cover 700 closes the unit room MR1b from the other side in the lateral direction. That is, in a state in which the first exterior cover 700 closes the unit room MR1b, the first exterior cover 700 is in close contact with the second sub-wall 81b of the second wall 81, the bottom wall 91, and the second portion 705 of the rear exterior body 702 (the separation wall portion 705b) and tightly closes the unit room MR1b.

That is, because the second sub-wall 81b of the second wall 81, the bottom wall 91, and the second portion 705 of the rear exterior body 702 (the separation wall portion 705b) define an opening that allows the unit room MR1b to open toward the other (left) side in the lateral direction, the first exterior cover 700 comes into close contact with these directly or indirectly when closing the unit room MR1b. In the present example embodiment, a sealing element is provided between the first exterior cover 700 and the second sub-wall 81b of the second wall 81, the bottom wall 91, and the second portion 705 of the rear exterior body 702 (the separation wall portion 705b). Thus, the unit room MR1b is isolated from the prime mover room MR1a, and the likelihood of flowing of hot air from the prime mover room MR1a into the unit room MR1b is eliminated or reduced.

As illustrated in FIGS. 5 and 12, the working machine 1 includes a heat insulation body 92 for blocking transfer of heat from the prime mover room MR1a toward the unit room MR1b. In the present example embodiment, the heat insulation body 92 is glass wool. The heat insulation body 92 is stacked on a surface of the second partition wall 90 (the wall body 90a) that faces toward the prime mover room MR1a. To be more specific, the electronic control unit 6 is fixed to the second partition wall 90. That is, the electronic control unit 6 is fixed to a surface of the second partition wall 90 facing toward the other (left) side in the lateral direction. In the present example embodiment, the electronic control unit 6 is screwed to the second partition wall 90 (in the present example embodiment, the bracket 90b). In line with this, the heat insulation body 92 is provided at least in a region of the second partition wall 90 that overlaps the electronic control unit 6.

As illustrated in FIGS. 5 to 7, the electronic control unit 6 according to the present example embodiment is configured to route downward the wire PL connected thereto. That is, the wire PL connected to the electronic control unit 6 extends downward from the electronic control unit 6. In line with this, the wire hole 900 is provided below the electronic control unit 6. In the present example embodiment, because the electronic control unit 6 is a controller (ECU) for controlling an internal combustion engine (diesel engine) that is the prime mover 5, the wire PL connected to the electronic control unit 6 has a large diameter. Therefore, when the wire PL is to be bent and routed, it is difficult to bend the wire PL with a small radius of curvature compared with wire PL having a small diameter.

In consideration of this, the wire hole 900 is provided below the electronic control unit 6 attached to the second partition wall 90 (the wall body 90a). That is, the wire hole 900 is provided at a position overlapping the wire PL that is connected to the electronic control unit 6 and that extends downward. The wire hole 900 has a size that allows the wire PL extending downward in the up-down direction to be bent and inserted therethrough diagonally. That is, the size W (see FIG. 12) of the wire hole 900 in the front-rear direction is larger than the diameter d of the wire PL. In contrast, as illustrated in FIG. 13, the size H of the wire hole 900 in the up-down direction is larger than d/sine, where d is the diameter of the wire PL, and 0 is the inclination angle of the wire PL (the center line of the wire PL) that extends vertically downward, that is bent in the unit room MR1b, and that passes through the wire hole 900 of the second partition wall 90 (the acute angle with respect to the center line of the second partition wall 90 (the wall body 90a) extending in the up-down direction).

In consideration of the fact that the size of the wire hole 900 is large, as illustrated in FIG. 12, in the present example embodiment, the sealing body 93 includes a cover body 94 configured to cover the side of the wire hole 900 that faces the unit room MR1b and including a wire insertion portion 940 to allow the wire PL to extend outward therethrough in a direction perpendicular to the lateral direction (second direction), and a grommet 95 fitted to the wire insertion portion 940 and configured to allow the wire PL to be inserted therethrough.

The cover body 94 includes a cover body 941 that covers the wire PL inserted through the wire hole 900 together with the wire hole 900 from the other side in the lateral direction, and a flange 942 that extends outward from the periphery of the cover body 941 and that is superposed on the second partition wall 90 around the wire hole 900.

In the present example embodiment, the cover body 941 includes an outer peripheral wall portion 941a that has a shape corresponding to the shape of the wire hole 900 and extends from one side toward the other side in the lateral direction, and a closing portion 941b that closes a region surrounded by an edge of the outer peripheral wall portion 941a on the other side in the lateral direction.

The wire insertion portion 940 is provided at a position corresponding to the wire PL (the wire PL extending downward) connected to the electronic control unit 6. The wire insertion portion 940 includes a cutout or a hole provided in the outer peripheral wall portion 941a. In the present example embodiment, the wire insertion portion 940 includes a rectangular cutout that is cut out in a portion of the outer peripheral wall portion 941a from one side toward the other side in the lateral direction. The outer peripheral wall portion 941a has a shape such that, in a state in which the cover body 94 is attached to the second partition wall 90 (the wall body 90a), the wire insertion portion 940 (cutout) faces diagonally rearward and upward and the outer peripheral wall portion 941a forms a space in which the wire PL that has passed through the wire insertion portion 940 can be interposed between the closing portion 941b and the second partition wall 90 (the wall body 90a).

In line with this, in the circumferential direction of the outer peripheral wall portion 941a, the size in the lateral direction of a portion including at least the wire insertion portion 940 is larger than the diameter d of the wire PL. To be more specific, in the circumferential direction of the outer peripheral wall portion 941a, the size in the lateral direction of the portion including at least the wire insertion portion 940 is larger than the maximum dimension in the second direction of an attachment portion 950 (described below) of the grommet 95 through which the wire PL is inserted.

To be more specific, in the present example embodiment, the size in the lateral direction is a certain size that is larger than the diameter d of the wire PL in a predetermined upper area that extends downward from an upper end of the outer peripheral wall portion 941a in the up-down direction and that includes the wire insertion portion 940 of the outer peripheral wall portion 941a, and the size in the lateral direction decreases toward a lower end of the outer peripheral wall portion 941a in a lower area below the upper area of the outer peripheral wall portion 941a. In line with this, the closing portion 941b includes an upper region 943a that keeps a certain distance from the second partition wall 90 (the wall body 90a), and a lower region 943b that is inclined toward the second partition wall 90 (the wall body 90a) downward from the upper region 943a.

Thus, in the space between the cover body 941 and the second partition wall 90, an upper space region extending downward from the wire insertion portion 940 is a space in which the wire PL extending in the up-down direction can be interposed, and a lower space region below the upper space region is a space that can guide the wire PL into the wire hole 900.

The flange 942 extends from an edge of the outer peripheral wall portion 941a on one of opposite sides in the lateral direction outward in a direction perpendicular to the surface of the outer peripheral wall portion 941a. The flange 942 is superposed on and fixed to the second partition wall 90 (the wall body 90a) in a state in which the outer peripheral wall portion 941a extends along the outer periphery of the wire hole 900. In the present example embodiment, the cover body 94 (the flange 942) is screwed to the second partition wall 90 (the wall body 90a).

The grommet 95 is made of a rubber material or an elastic resin material. In the present example embodiment, the grommet 95 includes the attachment portion 950 that is attachable to the wire insertion portion 940 of the cover body 94 and that has an insertion hole 950a through which the wire PL is inserted. The grommet 95 according to the present example embodiment includes a tubular bellows portion 951 that has an inner hole through which the wire PL can be inserted and that is provided continuously from the attachment portion 950 in such a way that the inner hole communicates with the insertion hole 950a.

The attachment portion 950 has a shape corresponding to the shape of the wire insertion portion 940. In the present example embodiment, because the wire insertion portion 940 has a rectangular shape, the attachment portion 950 has a plate-like shape that is rectangular in plan view. The attachment portion 950 has, around the entire periphery at a middle position in the thickness direction, a groove into which the peripheral edge portion of the wire insertion portion 940 of the outer peripheral wall portion 941a is fitted.

The attachment portion 950 of the grommet 95 having a configuration described above is attached to the wire insertion portion 940 in a state in which the bellows portion 951 extends in an upper space region. As described above, because the wire insertion portion 940 is provided at a position corresponding to the wire PL (the wire PL extending downward) connected to the electronic control unit 6, the insertion hole 950a of the grommet 95 (the attachment portion 950) is also provided at a position corresponding to the wire PL (the wire PL extending downward) connected to the electronic control unit 6. The diameter of the bellows portion 951 decreases from a position adjacent to the attachment portion 950 toward a distal end, and at least an inner peripheral surface of a distal end portion is in close contact with an outer peripheral surface of the wire PL.

As described above, in the working machine 1 according to the present example embodiment, as illustrated in FIG. 5, the second partition wall 90 divides the machine room MR (the first machine room MR1), which is separated from the operator's room DR by the first partition wall 8, into the prime mover room MR1a in which the prime mover 5 is provided and the unit room MR1b in which the electronic control unit 6 that controls the prime mover 5 is provided. Thus, although the electronic control unit 6 is provided in the unit room MR1b adjacent (close) to the prime mover room MR1a (region) in which the prime mover 5 is provided, the second partition wall 90 allows the electronic control unit 6 to be provided in an environment that is not likely to be affected by generation of heat by the prime mover 5.

Because the second partition wall 90 (in the present example embodiment, the wall body 90a) has the wire hole 900, the wire PL is inserted through the wire hole 900 and connects the prime mover 5 and the electronic control unit 6. Thus, the wire PL connects the prime mover 5 and the electronic control unit 6 with the shortest distance. Moreover, because the sealing body 93 seals (closes) the gap between the inner periphery of the wire hole 900 and the outer periphery of the wire PL, the likelihood of flowing of hot air in the prime mover room MR1a into the unit room MR1b and increasing of the temperature in the unit room MR1b is eliminated or reduced. Thus, it is possible to eliminate or reduce the likelihood of a malfunction of the electronic control unit 6 due to the effect of heat. That is, with the working machine 1 according to the present example embodiment, it is easy to route the wire PL that connects the prime mover 5 and the electronic control unit 6, and it is possible to reduce the effect of heat of the prime mover 5 during driving on the electronic control unit 6 that controls the prime mover 5.

In particular, because the second partition wall 90 includes the wall body 90a and the bracket 90b and the electronic control unit 6 is fixed to the bracket 90b, the electronic control unit 6 is in a state of being separated from (spaced apart from) the wall body 90a, and thus the electronic control unit 6 does not surface-contact the wall body 90a. Also with this configuration, the effect of heat on (heat transfer to) the electronic control unit 6 from the second partition wall 90 (the wall body 90a) is reduced.

Because the working machine 1 includes the partition wall body 9 including the second partition wall 90 and the partition wall body 9 includes the bottom wall 91 that extends from a lower edge of the second partition wall 90 toward the unit room MR1b and that is in close contact with the first partition wall 8 at a side where the operator's seat 10 is present (in close contact with the surface of the first partition wall 8 that faces the machine room MR), also at a lower portion of the unit room MR1b, the machine room MR (first machine room MR1) is divided by the bottom wall 91, and the effect of heat from the machine room MR (prime mover room MR1a) on the electronic control unit 6 in the unit room MR1b is more reliably reduced.

Moreover, because the hood includes an exterior member including the separation wall portion 705b and the first exterior cover 700, a rear portion of the unit room MR1b is also separated from the machine room MR, and the unit room MR1b is closed by the first exterior cover 700. Thus, the electronic control unit 6 is reliably protected not only from the effect of heat from the machine room MR (prime mover room MR1a) but also from external effects (rain, wind, and the like).

Because the hood includes the second exterior cover 710 having the air intake hole 710a for drawing outside air into the prime mover room MR1a, fresh outside air is drawn into the prime mover room MR1a through the air intake hole 710a. Thus, the likelihood of excessive increase of the temperature in the prime mover room MR1a is eliminated or reduced.

Moreover, because the hood includes the first hood 701 that covers the prime mover between the first exterior cover 700 and the second exterior cover 710 and the first hood 701 and exterior members define the prime mover room MR1a, the prime mover 5 and other equipment in the prime mover room MR1a are reliably protected.

Because the swivel base 21 (the frame 21) includes the base plate 210 that supports the operator's seat 10 and the prime mover 5 and the air exhaust hole 210a (212a) through which air in the prime mover room MR1a is discharged to the outside and that extends through the base plate 210 in the up-down direction is provided in a region of the base plate 210 corresponding to the prime mover room MR1a, hot air in the prime mover room MR1a is released to the outside and the likelihood of increase of the temperature in the prime mover room MR1a is eliminated or reduced. In line with this, the effect of heat from the prime mover room MR1a into the unit room MR1b via the second partition wall 90 further decreases.

As illustrated in FIG. 14, because the fan 53 is provided closer than the prime mover to the second exterior cover 710 in the prime mover room MR1a, when the fan 53 is driven, drawing of outside air into the prime mover room MR1a and discharging of hot air in the prime mover room MR1a to the outside are forcibly performed, and increase of the temperature in the prime mover room MR1a is maximally suppressed. Thus, the effect of heat from the prime mover room MR1a into the unit room MR1b via the second partition wall 90 further decreases.

In particular, because the opening 210a (the multiple holes 212a of the perforated metal 212) of the base plate 210 of the swivel base 21 is an air exhaust hole, when the fan 53 is driven (to draw air), outside air flows from one (right) side toward the other (left) side in the lateral direction and flows (is exhausted) from above to below. Thus, air (hot air) in an upper space of the prime mover room MR1a flows toward the air exhaust hole smoothly, and, as a result, even when the DPF 50, which tends to have a high temperature, is provided above the prime mover 5, increase of the temperature in an upper space of the prime mover room MR1a (a region corresponding to the second partition wall 90) is maximally suppressed. Accordingly, because increase of the temperature of the second partition wall 90 is suppressed, the effect of heat on the electronic control unit 6 fixed to the second partition wall 90 is also maximally suppressed, and occurrence of a fault or a malfunction of the electronic control unit 6 is also reduced.

Because the heat insulation body 92 is stacked on a surface of the second partition wall 90 facing toward the prime mover room MR1a, heat of the prime mover room MR1a is not easily transferred to the second partition wall 90 (the wall body 90a). Thus, the effect of heat on the unit room MR1b is reduced or eliminated. In particular, because glass wool is used as the heat insulation body 92, the effect of blocking heat to the second partition wall 90 is very strong.

In particular, because the electronic control unit 6 is fixed to the second partition wall 90 and the heat insulation body 92 is provided at least on a region of the second partition wall 90 that overlaps the electronic control unit 6, even when the electronic control unit 6 is fixed to the second partition wall 90, heat insulation can be achieved by the heat insulation body 92 on the back side (at a corresponding position).

Because the sealing body 93 includes the cover body 94 and the grommet 95 through which the wire PL can be inserted, the cover body 94 covers the wire hole 900 and the wire PL inserted through the wire hole 900, and the grommet 95 closes the gap between the cover body 94 and the wire PL. Thus, even when the wire hole 900 has a large size with which the wire PL can be easily inserted therethrough, the gap between the wire PL and the insertion portion is closed, and the unit room MR1b and the prime mover room MR1a are airtightly separated.

Example embodiments have been as described above, and example embodiments of the present invention provide working machines 1 of the following items (items 1 to 11).

(Item 1) A working machine 1 including a machine body 2 including a frame 21, an operator's seat 10 supported by the frame 21, a prime mover room MR1a to house a prime mover 5 supported by the frame 21, the prime mover room MR1a and the operator's seat 10 being arranged in a first direction, a unit room MR1b to house an electronic control unit 6 to control the prime mover 5, the unit room MR1b and the prime mover room MR1a being arranged in a second direction which intersects the first direction, a first partition wall 8 to divide a space above the frame 21 into the prime mover room MR1a and an operator's seat-side space on the same side of the prime mover room MR1a as the operator's seat 10 such that the prime mover room MR1a and the operator's seat-side space are arranged in the first direction, and a second partition wall 90, including an edge portion in close contact with the first partition wall 8, to separate the prime mover room MR1a from the unit room MR1b.

With the working machine 1 according to item 1, although the electronic control unit 6 is provided in the unit room MR1b adjacent (close) to the prime mover room MR1a (region) in which the prime mover 5 is provided, the second partition wall 90 allows the electronic control unit 6 to be provided in an environment that is not likely to be affected by generation of heat by the prime mover 5. Accordingly, the working machine 1 according to item 1 can reduce the effect of heat of the prime mover 5 during driving on the electronic control unit 6 even when the electronic control unit 6 is provided near the prime mover 5.

(Item 2) The working machine 1 according to item 1, further including a partition wall body 9 including the second partition wall 90, wherein the partition wall body 9 includes a bottom wall 91 which extends from a lower edge portion of the second partition wall 90 toward the unit room MR1b and which is in close contact with the first partition wall 8 at a side where the operator's seat 10 is present.

With the working machine 1 according to item 2, because the partition wall body 9 including the second partition wall 90 includes the bottom wall 91 and a lower portion of the unit room MR1b is separated from the prime mover room MR1a by the bottom wall 91, the effect of heat from the prime mover room MR1a on the electronic control unit 6 in the unit room MR1b is more reliably reduced. Moreover, because the partition wall body 9 includes the second partition wall 90 and the bottom wall 91, both the second partition wall 90 and the bottom wall 91 are appropriately positioned by appropriately positioning a single body.

(Item 3) The working machine 1 according to item 2, further including an exterior body 7 to cover a machine room MR including the prime mover room MR1a and the unit room MR1b, and a separation wall portion 705b which is in close contact with an edge portion of the second partition wall 90 that is different from the edge portion of the second partition wall 90 in close contact with the first partition wall 8 and the lower edge portion of the second partition wall 90 and which extends in the same direction as the bottom wall 91, wherein the exterior body 7 includes a first exterior cover 700 which is located on one of opposite sides in the second direction of the second partition wall 90, which faces the second partition wall 90 with a space therebetween, which covers the electronic control unit 6 in the unit room MR1b at the one of opposite sides in the second direction of the electronic control unit 6, and which is configured to be in close contact with the separation wall portion 705b.

With the working machine 1 according to item 3, because the unit room MR1b is separated from the prime mover room MR1a by the separation wall portion 705b and also the unit room MR1b is closed by the first exterior cover 700, the electronic control unit 6 is reliably protected from not only the effect of heat from the machine room MR (prime mover room MR1a) but also from external effects (rain, wind, and the like).

(Item 4) The working machine 1 according to any one of items 1 to 3, wherein the electronic control unit 6 is fixed to the second partition wall 90.

With the working machine 1 according to item 4, because the electronic control unit 6 is fixed to the second partition wall 90, which is a structural body, the electronic control unit 6 is positioned stably.

(Item 5) The working machine 1 according to any one of items 1 to 4, wherein the second partition wall 90 includes a metal plate.

With the working machine 1 according to item 5, because the second partition wall 90 includes a metal plate having rigidity, strength can be increased and also a structural body having high rigidity is constructed due to the combined effect with the first partition wall 8 and the like.

(Item 6) The working machine 1 according to item 3 or according to item 4 or 5 taken in combination with item 3, wherein the exterior body 7 includes a second exterior cover 710 to cover equipment on the frame 21 from the other of the opposite sides in the second direction of the equipment at the opposite side of the equipment from the first exterior cover 700 in the second direction, and the second exterior cover 710 includes an air intake hole 710a to allow outside air to enter the prime mover room MR1a therethrough.

With the working machine 1 according to item 6, because fresh outside air is drawn into in the prime mover room MR1a through the air intake hole 710a of the second exterior cover 710, the likelihood of excessive increase of the temperature in the prime mover room MR1a is eliminated or reduced.

(Item 7) The working machine 1 according to any one of items 1 to 6, wherein the frame 21 includes a base plate 210 to support the operator's seat 10 and the prime mover 5, and the base plate 210 includes an air exhaust hole 210a (212a) to allow air in the prime mover room MR1a to be discharged therethrough.

With the working machine 1 according to item 7, because hot air in the prime mover room MR1a is released downward through the air exhaust hole 210a (212a) of the base plate 210, an increase in the temperature of the prime mover room MR1a is suppressed, and the effect of heat from the prime mover room MR1a into the unit room MR1b via the second partition wall 90 further decreases.

(Item 8) The working machine 1 according to item 6, further including a forced-air-cooled radiator 51 provided in the prime mover room MR1a to cool the prime mover 5, wherein the forced-air-cooled radiator 51 is provided on the same side of the prime mover 5 as the second exterior cover 710.

With the working machine 1 according to item 8, intake of outside air into the prime mover room MR1a and discharging of hot air from the prime mover room MR1a are forcibly performed by driving the forced-air-cooled radiator 51 (driving the fan 53 to cool the radiator 51), an increase in temperature in the prime mover room MR1a is maximally suppressed, and, in turn, the effect of heat from the prime mover room MR1a into the unit room MR1b via the second partition wall 90 further decreases.

(Item 9) The working machine 1 according to any one of items 1 to 8, further including a heat insulation body 92 on a surface of the second partition wall 90 that faces toward the prime mover room MR1a, the heat insulation body 92 being configured to prevent or reduce heat transfer from the prime mover room MR1a toward the unit room MR1b.

With the working machine 1 according to item 9, because heat in the prime mover room MR1a is not easily transferred to the second partition wall 90 (wall body) due to the presence of the heat insulation body 92, the effect of heat on the unit room MR1b is reduced or eliminated.

(Item 10) The working machine 1 according to item 9, wherein the electronic control unit 6 is fixed to the second partition wall 90, and the heat insulation body 92 is provided at least in a region of the second partition wall 90 that overlaps the electronic control unit 6.

With the working machine 1 according to item 10, even though the electronic control unit 6 is fixed to the second partition wall 90, heat insulation can be achieved due to the heat insulation body 92 on the opposite side of the second partition wall 90 from (at a position corresponding to) the electronic control unit 6.

(Item 11) The working machine 1 according to any one of items 1 to 10, wherein the second partition wall 90 includes a wire hole 900 to allow a wire PL connecting the prime mover 5 and the electronic control unit 6 to extend therethrough between the prime mover room MR1a and the unit room MR1b, and includes a sealing body 93 to seal a gap between an outer periphery of the wire PL and an inner periphery of the wire hole 900.

With the working machine 1 according to item 11, the wire PL connects the prime mover 5 and the electronic control unit 6 with the shortest distance via the wire hole 900, and the sealing body 93 seals (closes) the gap between the inner periphery of the wire hole 900 and the outer periphery of the wire PL. Thus, because the likelihood of an increase in the temperature of the unit room MR1b due to flowing of hot air from the prime mover room MR1a into the unit room MR1b is eliminated or reduced, the likelihood of the occurrence of a failure or the like of the electronic control unit 6 due to the effect of heat is eliminated or reduced.

(Item 12) The working machine 1 according to item 11, wherein the sealing body 93 includes a cover body 94 to cover a side of the wire hole 900 that faces the unit room MR1b, the cover body 94 including a wire insertion portion 940 to allow the wire PL to extend outward therethrough in a direction perpendicular to the second direction, and a grommet 95 fitted to the wire insertion portion 940 and configured to allow the wire PL to be inserted therethrough.

With the working machine 1 according to item 12, even when the wire hole 900 has a large size with which the wire PL can be easily inserted therethrough, the gap between the wire PL and the insertion portion is closed, and the unit room MR1b and the prime mover room MR1a are airtightly separated.

The present invention is not limited to example embodiments described above, and can be modified as appropriate within the gist of the present invention.

In example embodiments described above, a backhoe is described as an example of the working machine 1, but the working machine 1 is not limited to a backhoe. For example, the working machine 1 may be a construction machine other than a backhoe, or may be an agricultural machine such as a tractor.

In example embodiments described above, the working machine 1 includes the partition wall body 9, the partition wall body 9 includes the second partition wall 90, the bottom wall 91, and the second wall 81 (the second sub-wall 81b), and these are integral with each other. However, this does not imply any limitation. For example, the second partition wall 90, the second wall 81 (the second sub-wall 81b), and the bottom wall 91 may be independent from each other.

In example embodiments described above, the second wall 81 is divided into the second main wall 81a and the second sub-wall 81b. However, this does not imply any limitation. When the first partition wall 8 is a double wall, the first wall 80 and the second wall 81 each may include a single metal plate. That is, the second wall 81 may be a single wall in which the second main wall 81a and the second sub-wall 81b are combined and that entirely faces the first wall 80.

In example embodiments described above, the second partition wall 90 (the wall body 90a) is at a middle position in the machine room MR (the first machine room MR1) in the front-rear direction and, in line with this, includes the bottom wall 91 and exterior members, and these make a portion of the first machine room MR1 into the unit room MR1b. However, this does not imply any limitation. For example, a rear end of the second partition wall 90 in the front-rear direction may extend to a rear end of the second region A2, and a lower end of the second partition wall 90 may extend to the base plate 210. By doing so, the first machine room MR1 is divided into the prime mover room MR1a and the unit room MR1b in the lateral direction, and the likelihood of flowing of hot air in the prime mover room into the unit room MR1b is eliminated or reduced.

In example embodiments described above, the second partition wall 90 is a single wall. However, this does not imply any limitation. For example, as with the first partition wall 8, the second partition wall 90 may also be a double wall, or a wall including three or more overlapping portions.

While example embodiments of the present invention have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing from the scope and spirit of the present invention. The scope of the present invention, therefore, is to be determined solely by the following claims.