WORK VEHICLE

Description

BACKGROUND

TECHNICAL FIELD

The present invention relates to a work vehicle.

DISCUSSION OF THE BACKGROUND

JP2022-028355A shows a typical arrangement of hydraulic hoses connecting a hydraulic pump and the hydraulic motors to drive crawlers in a compact track loader. JP2013-129997A shows another arrangement of hydraulic hoses connecting a hydraulic pump and hydraulic motors to drive crawlers in a hydraulic shovel.

An objective of a technology disclosed in the present application is to provide a work vehicle having a different arrangement of hydraulic hoses from prior arts.

SUMMARY

In accordance with one aspect of the present disclosure, a work vehicle includes a body frame, a first hydraulic motor, a second hydraulic motor, a first hydraulic pump, a second hydraulic pump, first hydraulic hoses, and second hydraulic hoses. The body frame has a left side wall and a right side wall opposite to the left side wall. The first hydraulic motor is provided at the left side wall. The second hydraulic motor is provided at the right side wall. The first hydraulic pump is provided in the body frame and includes first ports through which the first hydraulic pump is configured to supply a first hydraulic fluid to the first hydraulic motor and configured to receive the first hydraulic fluid from the first hydraulic motor. The first ports are provided to be closer to the right side wall than the left side wall. The second hydraulic pump is provided in the body frame and includes second ports through which the second hydraulic pump is configured to supply a second hydraulic fluid to the second hydraulic motor and configured to receive the second hydraulic fluid from the second hydraulic motor. The second ports are provided to be closer to the left side wall than the right side wall. The first hydraulic motor has third ports through which the first hydraulic fluid is configured to flow. The second hydraulic motor has fourth ports through which the second hydraulic fluid is configured to flow. The first hydraulic hoses connect the first ports and the third ports, respectively such that the first hydraulic fluid flows through the first hydraulic hoses. The second hydraulic hoses connect the second ports and the fourth ports, respectively such that the second hydraulic fluid flows through the second hydraulic hoses.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the present disclosure 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.

FIG. 1 shows a side view of a work vehicle.

FIG. 2 shows a top view of the work vehicle.

FIG. 3 is a side view of the work vehicle when a cabin is rotated.

FIG. 4 is a sectional view of the cabin taken along the line IV-IV’ in FIG. 2.

FIG. 5 shows a top view of the work vehicle with the traveling device, the work device, the cabin, the cover, the bonnet cover and a part of the body frame omitted.

FIG. 6 shows a front view of the work vehicle shown in FIG. 5.

FIG. 7 shows an enlarged right front perspective view of the work vehicle with the traveling device, the work device, the cabin, the engine, the cover, and a part of the body frame omitted.

FIG. 8 shows an enlarged left front perspective view of the work vehicle with the traveling device, the work device, the cabin, the engine, the cover, and a part of the body frame omitted.

FIG. 9 shows an enlarged left side view of the work vehicle with the left side wall omitted.

FIG. 10 shows an enlarged right side view of the work vehicle with the right side wall omitted.

DESCRIPTION OF THE EMBODIMENTS

<Embodiment>

<Overall Configuration>

Referring to FIGS. 1 and 2, a work vehicle 1, such as a compact truck loader, includes a body frame 2, a pair of traveling devices 3, and a work device 4. The body frame 2 supports the traveling device 3 and the work device 4. In the illustrated embodiment, the traveling device 3 is a track-type traveling device 3. Therefore, each of the pair of traveling devices 3 includes a sprocket 31, driven wheels 32 and 33, and a rolling wheel 34 which are driven by a hydraulic motor 30. However, each of the pair of traveling devices 3 is not limited to the crawler type traveling device 3. Each of the pair of traveling devices 3 may be, for example, a front-wheel/rear-wheel traveling device 3, or may be a traveling device 3 wheel and a rear crawler. The work device 4 comprises a work equipment (bucket) 41 at a distal end of the work device 4. A proximal end of the work device 4 is attached to a rear portion of the body frame 2. The work device 4 includes a pair of arm assemblies 42 for rotatably supporting the bucket 41 via a bucket pivot shaft 43. Each of the pair of arm assemblies 42 includes a link 44 and an arm 45.

The link 44 includes a fulcrum shaft 46 is rotatable with respect to the body frame 2. The arm is rotatable around the joint shaft 47 relative to the link 44. The work device 4 further comprises a plurality of arm cylinders 48 and at least one equipment cylinder 49. Each of the plurality of arm cylinders 48 is rotatably connected to the body frame 2 and the arm 45, and moves the link 44, the arm 45, and the like to raise and lower the bucket 41. The at least one tool cylinder 49 is configured to tilt the bucket 41. The body frame 2 includes a cabin 5. The cabin 5 includes a front window 51 which can be opened and closed, and its outer shape is defined by a cabin frame 53. The front window 51 may be omitted. The cabin 5 includes a seat 54 on which a driver is to sit and an operation lever 55 which is operated by the driver. As shown in FIG. 3, the cabin frame 53 is rotatable about a pivot A_XC on the body frame 2. As shown in FIG. 2, the pivot A_XC is defined by the rotational shafts RSL and RSR.

Referring to FIG. 3, the cabin 5 is attached to the front portion of the body frame 2. Referring to FIGS. 1 and 3, the cabin 5 can be switched between a closed state (see FIG. 1) in which the cabin 5 is placed on the front body portion 2F and an open state (see FIG. 3) in which the cabin 5 is separated from the front body portion 2F by pivoting around the pivot A_XC. In the closed state, for example, the supported portion 53SUP of the cabin 5 abuts against the supporting portion 2SUP of the front body portion 2F, and the cabin 5 is supported by the front body portion 2F. The body frame 2 (front body portion 2F) has a front space 2HOL for storing a floor frame 53FS (details will be described later) of the cabin 5 in the closed state. Accordingly, the cabin 5 is rotatably mounted on the body frame 2 to have the front space 2HOL opened and closed.

Note that in the embodiment according to the present application, the front-back direction D_FB (forward direction D_F/backward direction D_B) means a front-back direction (forward direction/backward direction) as viewed from a driver seated on the seat 54 of the cabin 5. A leftward direction D_L, a rightward direction D_R, a width direction D_W means the left direction, the right direction, and the left-right direction as viewed from the driver, respectively. An upward direction D_U, a downward direction D_D, height direction D_H means an upward direction, a downward direction, and a height direction as viewed from the driver. The front-back, left-right (width), and up-down (height) directions of the work vehicle 1 coincide with the front-back, left-right (width), and up-down (height) directions as viewed from the driver, respectively.

FIG. 1 shows the left side of the work vehicle 1. As shown in FIG. 2, the body frame 2 is substantially plane-symmetric with respect to a body frame center plane M, and has a first side surface 2L which is a left side surface and a second side surface 2R which is a right side surface. Among the pair of traveling devices 3, the traveling device 3 provided on the first side surface 2L is shown as a first traveling device 3L, and the traveling device 3 provided on the second side surface 2R is shown as a second traveling device 3R. Among the pair of arm assemblies 42, the arm assembly 42 provided on the left side with respect to a body frame center plane M is shown as the first arm assembly 42L, and the arm assembly 42 provided on the right side with respect to the body frame center plane M is shown as the second arm assembly 42R. The link 44 provided on the left side with respect to the body frame center plane M is shown as a first link 44L. The arm 45 provided on the left side with respect to the body frame center plane M is shown as a first arm 45L, and the arm 45 provided on the right side with respect to the body frame center plane M is shown as a second arm 45R. The fulcrum shaft 46 provided on the left side with respect to the body frame center plane M is shown as the first fulcrum shaft 46L, and the fulcrum shaft 46 provided on the right side with respect to the body frame center plane M is shown as the second fulcrum shaft 46R. The joint shaft 47 provided on the left side with respect to the body frame center plane M is shown as a first joint shaft 47L, and the joint shaft 47 provided on the right side with respect to the body frame center plane M is shown as a second joint shaft 47R. Among the hydraulic motors 30, the hydraulic motor 30 provided on the left side with respect to the body frame center plane M is a first hydraulic motor 30L, and the hydraulic motor 30 provided on the right side with respect to the body frame center plane M is shown as a second hydraulic motor 30R.

Referring to FIGS. 1 and 2, a work vehicle 1 includes an engine 6 provided on a rear portion of a body frame 2 and the plurality of hydraulic pumps 7 including a first hydraulic pump 7L and a second hydraulic pump 7R. The engine 6 is connected to the plurality of hydraulic pumps 7 to drive the plurality of hydraulic pumps 7. The first hydraulic pump 7L and the second hydraulic pump 7R are configured to discharge hydraulic fluid in order to drive the hydraulic motors 30 that drives the sprockets 31. In FIG. 2, the sprocket 31 to be driven by the first hydraulic motor 30L is referred to as a first sprocket 31L, the sprocket 31 to be driven by the second hydraulic motor 30R is referred to as a second sprocket 31R. The first hydraulic motor 30L and the second hydraulic motor 30R have respective rotational axes A_M to drive the first sprocket 31L and the second sprocket 31R, respectively. FIG. 2 shows the rotational axes A_M of the hydraulic motors 30. The plurality of hydraulic pumps 7 other than the first hydraulic pump 7L and the second hydraulic pump 7R are configured to discharge hydraulic fluid in order to drive hydraulic actuators (a plurality of arm cylinders 48, at least one tool cylinder 49, and the like) connected to the work device 4. The engine 6 is provided between the pair of arm assemblies 42 in the width direction D_W of the work vehicle 1. The work vehicle 1 further includes a cover 8 for covering an engine 6. The work vehicle 1 further includes a bonnet cover 9 provided at the rear end of the body frame 2. The bonnet cover 9 can be opened and closed such that a maintenance person can perform maintenance work of the engine 6 and the like.

FIG. 4 is a sectional view of the cabin 5 taken along the section line IV-IV’ in FIG. 2. Referring to FIG. 4, the cabin frame 53 further includes a front frame 53FT, a floor frame 53FS, and a seat frame 53SS. The second side frame 53RF connects the front frame 53FT, the floor frame 53FS, and the seat frame 53SS. Although not shown in FIG. 4, the cabin frame 53 is substantially symmetrical with respect to the body frame center plane M (see FIG. 2), and as shown in FIG. 3, the first side frame 53LF connects the front frame 53FT, the floor frame 53FS and the seat frame 53SS. The front frame 53FT supports the front window 51. The front frame 53FT includes an extension 53FTP that extends forward from the body frame 2 when the cabin frame 53 is mounted on the body frame 2. The floor frame 53FS supports a floor 56 on which the driver's foot is to be placed. The floor 56 may be fixed on the floor frame 53FS. Alternatively, the floor 56 may be detachable from the floor frame 53FS. The seat frame 53SS supports the seat 54 opposite to the floor frame 53FS with respect to the front frame 53FT. The floor frame 53FS protrudes downward from the seat frame 53SS in the height direction D_H of the work vehicle 1 when the cabin 5 closes the front space 2HOL. The floor frame 53FS includes a bottom frame 53FSB and a slant frame 53FSI. The bottom frame 53FSB is connected to the seat frame 53SS. The bottom frame 53FSB has a flat plate shape. The slant frame 53FSI connects the front frame 53FT and the bottom frame 53FSB. To be specific, the slant frame 53FSI is connected to the extension 53FTP. Referring to FIG. 4, the body frame 2 includes a front base frame 2BF that covers the front side of the slant frame 53FSI when the cabin frame 53 is placed on the body frame 2. FIG. 4 shows a trajectory through which the outer end of the slant frame 53FSI farthest from the pivot A_XC passes when the slant frame 53FSI rotates around the pivot A_XC, by an arc ARC. The slant frame 53FS1 is so slanted that the slant frame 53FS1 cannot contact with the front base frame 2BF when the slant frame 53FS1 rotates around the pivot A_XC. The front base frame 2BF may be a part of the extension 53FTP.

FIG. 5 shows a top view of the work vehicle 1 with the traveling device 3, the work device 4, the cabin 5, the cover 8, the bonnet cover 9, and a part of the body frame 2 omitted. FIG. 6 shows a front view of the work vehicle 1 shown in FIG. 5. In FIG. 5, the part of the body frame 2 is omitted. As shown in FIGS. 5 and 6, the body frame 2 has a left side wall 21L and a right side wall 21R opposite to the left side wall 21L in the width direction D_W. The body frame 2 further has a body floor 22 connecting the left side wall 21L and the right side wall 21R and configured to support the engine 6 via engine mounts 6m1 to 6m3. The body floor 22 is configured to support the first hydraulic pump 7L and the second hydraulic pump 7R. The first hydraulic motor 30L is provided at the left side wall 21L. The second hydraulic motor 30R is provided at the right side wall 21R. The first hydraulic pump 7L and the second hydraulic pump 7R are provided in the body frame 2. Each of the engine mounts 6m1 to 6m3 usually consist of pairs of metal plates separated by a rubber insulator, which prevent the vibration of the engine 6 from shaking the work vehicle 1. One plate attaches to the engine 6, while the other attaches to the body frame 2. Since the engine 6 is provided on the rear portion of the body frame 2, there is a front dead space SF opposite to the engine 6 with respect to the first hydraulic pump 7L and the second hydraulic pump 7R.

FIG. 7 shows an enlarged right front perspective view of the work vehicle 1 with the traveling device 3, the work device 4, the cabin 5, the engine 6, the cover 8, and a part of the body frame 2 omitted. FIG. 8 shows an enlarged left front perspective view of the work vehicle 1 with the traveling device 3, the work device 4, the cabin 5, the engine 6, the cover 8, and a part of the body frame 2 omitted. As shown in FIGS. 7 and 8, the first hydraulic pump 7L includes first ports 7PL. The first ports 7PL include a first upper port 7PL1 and a first lower port 7PL2. The second hydraulic pump 7R includes second ports 7PR. The second ports 7PR include a second upper port 7PR1 and a second lower port 7PR2. As shown in FIG. 5, unlike the prior arts, the first ports 7PL are provided to be closer to the right side wall 21R than the left side wall 21L. There is a second gap G2 between the right side wall 21R and the first ports 7PL. Unlike the prior arts, the second ports 7PR are provided to be closer to the left side wall 21L than the right side wall 21R. There is a first gap G1 between the left side wall 21L and the second ports 7PR.

As shown in FIG. 7, the first hydraulic motor 30L has third ports 30PL. The third ports 30PL include a third upper port 30PL1 and a third lower port 30PL2. As shown in FIG. 8, the second hydraulic motor 30R has fourth ports 30PR. The fourth ports 30PR include a fourth upper port 30PR1 and a fourth lower port 30PR2. The work vehicle 1 further includes first hydraulic hoses 70L and second hydraulic hoses 70R. The first hydraulic hoses 70L connect the first ports 7PL and the third ports 30PL, respectively. The second hydraulic hoses 70R connect the second ports 7PR and the fourth ports 30PR, respectively. The first hydraulic hoses 70L include a first hose 70L1 and a second hose 70L2. The second hydraulic hoses 70R include a third hose 70R1 and a fourth hose 70R2.

In this embodiment, the first hose 70L1 connects the first upper port 7PL1 and the third upper port 30PL1, and the second hose 70L2 connects the first lower port 7PL2 and the third lower port 30PL2. The third hose 70R1 connects the second upper port 7PR1 and the fourth upper port 30PR1, and the fourth hose 70R2 connects the second lower port 7PR2 and the fourth lower port 30PR2. However, the first hose 70L1 may connect the first upper port 7PL1 and the third lower port 30PL2, and the second hose 70L2 may connect the first lower port 7PL2 and the third upper port 30PL1. The third hose 70R1 may connect the second upper port 7PR1 and the fourth lower port 30PR2, and the fourth hose 70R2 may connect the second lower port 7PR2 and the fourth upper port 30PR1.

Furthermore, the first hydraulic hoses 70L include first fittings 71L and third fittings 72L. The first fittings 71L are configured to be coupled to the first ports 7PL, respectively. The third fittings 72L are configured to be coupled to the third ports 30PL, respectively. The first fittings 71L include a first upper fitting 71L1 and a first lower fitting 71L2. The third fittings 72L include a third upper fitting 72L1 and a third lower fitting 72L2. The first hose 70L1 includes the first upper fitting 71L1 and the third upper fitting 72L1. The second hose 70L2 includes the first lower fitting 71L2 and the third lower fitting 72L2. The first upper fitting 71L1 is configured to be coupled to the first upper port 7PL1. The third upper fitting 72L1 is configured to be coupled to the third upper port 30PL1. The first lower fitting 71L2 is configured to be coupled to the first lower port 7PL2. The third lower fitting 72L2 is configured to be coupled to the third lower port 30PL2.

The second hydraulic hoses 70R include second fittings 71R and fourth fittings 72R. The second fittings 71R are configured to be coupled to the second ports 7PR, respectively. The fourth fittings 72R are configured to be coupled to the fourth ports 30PR respectively. The second fittings 71R include a second upper fitting 71R1 and a second lower fitting 71R2. The fourth fittings 72R include a fourth upper fitting 72R1 and a fourth lower fitting 72R2. The third hose 70R1 includes the second upper fitting 71R1 and the fourth upper fitting 72R1. The fourth hose 70R2 includes the second lower fitting 71R2 and the fourth lower fitting 72R2. The second upper fitting 71R1 is configured to be coupled to the second upper port 7PR1. The fourth upper fitting 72R1 is configured to be coupled to the fourth upper port 30PR1. The second lower fitting 71R2 is configured to be coupled to the second lower port 7PR2. The fourth lower fitting 72R2 is configured to be coupled to the fourth lower port 30PR2.

In this embodiment, the hydraulic fluid that flows through the first hydraulic pump 7L, the first hydraulic hoses 70L, and the first hydraulic motor 30L is referred to as first hydraulic fluid. Accordingly, the first hydraulic fluid is configured to flow through the third ports 30PL. The first hydraulic fluid flows through the first hydraulic hoses 70L. The first hydraulic pump 7L is configured to supply the first hydraulic fluid to the first hydraulic motor 30L through the first upper port 7PL1 and configured to receive the first hydraulic fluid from the first hydraulic motor 30L through the first lower port 7PL2, when the first hydraulic motor 30L rotates in a first circumferential direction around the rotational axes A_M. The first hydraulic pump 7L is configured to supply the first hydraulic fluid to the first hydraulic motor 30L through the first lower port 7PL2 and configured to receive the first hydraulic fluid from the first hydraulic motor 30L through the first upper port 7PL1, when the first hydraulic motor 30L rotates in a second circumferential direction opposite to the first circumferential direction around the rotational axes A_M.

The hydraulic fluid that flows through the second hydraulic pump 7R, the second hydraulic hoses 70R, and the second hydraulic motor 30R is referred to as second hydraulic fluid. Accordingly, the second hydraulic fluid is configured to flow through fourth ports 30PR. The second hydraulic fluid flows through the second hydraulic hoses 70R. The second hydraulic pump 7R is configured to supply the second hydraulic fluid to the second hydraulic motor 30R through the second upper port 7PR1 and configured to receive the second hydraulic fluid from the second hydraulic motor 30R through the second lower port 7PR2, when the second hydraulic motor 30R rotates in a third circumferential direction around the rotational axes A_M. The second hydraulic pump 7R is configured to supply the second hydraulic fluid to the second hydraulic motor 30R through the second lower port 7PR2 and configured to receive the second hydraulic fluid from the second hydraulic motor 30R through the second upper port 7PR1, when the second hydraulic motor 30R rotates in a fourth circumferential direction opposite to third circumferential direction the around the rotational axes A_M. The third circumferential direction is identical to one of the first circumferential direction and the second circumferential direction. The fourth circumferential direction is identical to another of the first circumferential direction and the second circumferential direction.

As seen in FIGS. 5 to 8, the work vehicle 1 further includes at least one holder 60 provided on the body frame 2 to hold the first hydraulic hoses 70L and the second hydraulic hoses 70R. The at least one holder 60 includes a first clamp 61 to hold the first hydraulic hoses 70L and a second clamp 62 to hold the second hydraulic hoses 70R. The first clamp 61 and the second clamp 62 are provided on the body floor 22 of the body frame 2. Furthermore, the at least one holder 60 includes a third clamp 63 provided on the body frame 2 to hold the first hydraulic hoses 70L. The at least one holder 60 further includes a fourth clamp 64 provided on the body frame 2 to hold the second hydraulic hoses 70R. More specifically, the third clamp 63 is provided between the first clamp 61 and the third ports 30PL along the first hydraulic hoses 70L. The fourth clamp 64 is provided between the second clamp 62 and the fourth ports 30PR along the second hydraulic hoses 70R. The third clamp 63 is provided on the left side wall 21L. The fourth clamp 64 is provided on the right side wall 21R.

The at least one holder 60 further includes a first hook 65 provided on the first clamp 61 to arrange the second hydraulic hoses 70R above or below the first hydraulic hoses 70L in the height direction D_H. The at least one holder 60 further includes a second hook 66 provided on the second clamp 62 to arrange the first hydraulic hoses 70L above or below the second hydraulic hoses 70R in the height direction D_H. The at least one holder 60 further includes a first arrangement hook 67 configured to hook the first hydraulic hoses 70L and a second arrangement hook 68 configured to hook the second hydraulic hoses 70R. The first hook 65, the second hook 66, the first arrangement hook 67, and second arrangement hook 68 each are made of metal bars. The first arrangement hook 67 is provided on the body frame 2 between the first clamp 61 and the third clamp 63 along the first hydraulic hoses 70L. More specifically, the first arrangement hook 67 is provided on the body frame 2 between the first clamp 61 and the second hook 66 along the first hydraulic hoses 70L. The second arrangement hook 68 is provided on the body frame 2 between the second clamp 62 and the fourth clamp 64 along the second hydraulic hoses 70R. More specifically, the second arrangement hook 68 is provided on the body frame 2 between the first hook 65 and the second clamp 62 along the second hydraulic hoses 70R. The first arrangement hook 67 and the second arrangement hook 68 are arranged such that the first hydraulic hoses 70L are arranged above or below the second hydraulic hoses 70R in the height direction D_H.

Since the first clamp 61 and the second clamp 62 are provided on the body frame 2, the first clamp 61 and the second clamp 62 are configured to vibrate more similarly to the body frame 2 than the engine 6. On the other hand, the first hydraulic pump 7L and the second hydraulic pump 7R are connected to the engine 6, then to the body frame 2 via the engine mounts 6m1 to 6m3. Accordingly, the first hydraulic pump 7L and the second hydraulic pump 7R are configured to vibrate more similarly to the engine 6 than to the body frame 2. Therefore, the first hydraulic hoses 70L vibrate between the first clamp 61 and the first ports 7PL more than between the first clamp 61 and the third ports 30PL. The second hydraulic hoses 70R vibrate between the second clamp 62 and the second ports 7PR more than between the second clamp 62 and the fourth ports 30PR.

Accordingly, the first hydraulic hoses 70L need to be attached to the first clamp 61 such that the first hydraulic hoses 70L between the first clamp 61 and the first ports 7PL have enough lengths to maintain proper connections of the first hydraulic hoses 70L and the first ports 7PL. The second hydraulic hoses 70R need to be attached to the second clamp 62 such that the second hydraulic hoses 70R between the second clamp 62 and the second ports 7PR have enough lengths to maintain proper connections of the second hydraulic hoses 70R and the second ports 7PR.

In order to instruct such attachment of the first hydraulic hoses 70L to the first clamp 61, the first hydraulic hoses 70L further include first marks 75L such that distances between the first marks 75L and the first fittings 71L are predetermined, respectively. The first clamp 61 holds the first hydraulic hoses 70L at the first marks 75L, respectively. More specifically, the first marks 75L include a first hose mark 75L1 (See FIG. 10) and a second hose mark 75L2. The first hose 70L1 includes the first hose mark 75L1. The second hose 70L2 includes the second hose mark 75L2. A length between the first upper fitting 71L1 and the first hose mark 75L1 is a predetermined first length. A length between the first lower fitting 71L2 and the second hose mark 75L2 is a predetermined second length. The predetermined second length is almost equal to the predetermined first length.

The second hydraulic hoses 70R further include second marks 75R such that distances between the second marks 75R and the second fittings 71R are predetermined, respectively. The second clamp 62 holds the second hydraulic hoses 70R at the second marks 75R, respectively. More specifically, the second marks 75R include a third hose mark 75R1 and a fourth hose mark 75R2. The third hose 70R1 includes the third hose mark 75R1. The fourth hose 70R2 includes the fourth hose mark 75R2. A length between the second upper fitting 71R1 and the third hose mark 75R1 is a predetermined third length. A length between the second lower fitting 71R2 and the fourth hose mark 75R2 is a predetermined fourth length. The predetermined fourth length is almost equal to the predetermined third length.

Furthermore, in order to facilitate attachment of the first hydraulic hoses 70L to the third clamp 63, the first hydraulic hoses 70L may further include third marks 76L such that distances between the third marks 76L and the third fittings 72L are predetermined, respectively. The third clamp 63 may hold the first hydraulic hoses 70L at the third marks 76L, respectively. More specifically, the third marks 76L may include a first additional hose mark 76L1 and a second additional hose mark 76L2. The first hose 70L1 may include the first additional hose mark 76L1. The second hose 70L2 may include the second additional hose mark 76L2. A length between the third upper fitting 72L1 and the first additional hose mark 76L1 is a predetermined fifth length. A length between the third lower fitting 72L2 and the second additional hose mark 76L2 is a predetermined sixth length. The predetermined sixth length is almost equal to the predetermined fifth length. In this embodiment, the first hydraulic motor 30L is provided directly on the left side wall 21L. However, if there is a suspension between the first hydraulic motor 30L and the body frame 2, third marks 76L are more effective in order to instruct enough lengths between the third marks 76L and the third fittings 72L to allow vibrations of the first hydraulic motor 30L with respect to the body frame 2.

In order to facilitate attachment of the second hydraulic hoses 70R to the fourth clamp 64, the second hydraulic hoses 70R may further include fourth marks 76R such that distances between the fourth marks 76R and the fourth fittings 72R are predetermined, respectively. More specifically, the fourth marks 76R may include a third additional hose mark 76R1 and a fourth additional hose mark 76R2. The third hose 70R1 may include the third additional hose mark 76R1. The fourth hose 70R2 may include the fourth additional hose mark 76R2. A length between the fourth upper fitting 72R1 and the third additional hose mark 76R1 is a predetermined seventh length. A length between the fourth lower fitting 72R2 and the fourth additional hose mark 76R2 is a predetermined eighth length. The predetermined eighth length is almost equal to the predetermined seventh length. In this embodiment, the second hydraulic motor 30R is provided directly on the right side wall 21R. However, if there is a suspension between the second hydraulic motor 30R and the body frame 2, fourth marks 76R are more effective in order to instruct enough lengths between the fourth marks 76R and the fourth fittings 72R to allow vibrations of the second hydraulic motor 30R with respect to the body frame 2. The first marks 75L, the second marks 75R, the third marks 76L, and the fourth marks 76R are usually made of vinyl tapes. However, the first marks 75L, the second marks 75R, the third marks 76L, and the fourth marks 76R can be made differently.

The first hydraulic hoses 70L and the second hydraulic hoses 70R are provided in the front space 2HOL (See FIG. 2). More specifically, as shown in FIG. 5, the first hydraulic hoses 70L pass through the first gap G1, the front dead space SF, and the second gap G2. The second hydraulic hoses 70R pass through the second gap G2, the front dead space SF, and the first gap G1. FIG. 9 shows an enlarged left side view of the work vehicle 1 with the left side wall 21L omitted, when the cabin 5 closes the front space 2HOL. FIG. 10 shows an enlarged right side view of the work vehicle 1 with the right side wall 21R omitted, when the cabin 5 closes the front space 2HOL.

As shown in FIGS. 9 and 10, the first hydraulic pump 7L and the second hydraulic pump 7R are provided below the seat frame 53SS in the height direction D_H when the cabin 5 closes the front space 2HOL. FIGS. 9 and 10 show a bottom line 53SSL of the seat frame 53SS to show the first hydraulic pump 7L and the second hydraulic pump 7R below the bottom line 53SSL. Furthermore, the first ports 7PL, the second ports 7PR, the third ports 30PL, and the fourth ports 30PR are provided above a lower end 53FSL of the floor frame 53FS in the height direction D_H when the cabin 5 closes the front space 2HOL. More specifically, the first ports 7PL, the second ports 7PR, the third ports 30PL, and the fourth ports 30PR are provided above the bottom frame 53FSB of the floor frame 53FS in the height direction D_H when the cabin 5 closes the front space 2HOL.

As shown in FIGS. 6 to 10, the first hook 65 includes a first support 65s configured to support the second hydraulic hoses 70R above the body floor 22 in the height direction D_H. The second hook 66 includes a second support 66s configured to support the first hydraulic hoses 70L above the body floor 22 in the height direction D_H. The first arrangement hook 67 includes a third support 67s configured to support the first hydraulic hoses 70L above the body floor 22 in the height direction D_H. The second arrangement hook 68 includes a fourth support 68s configured to support the second hydraulic hoses 70R above the body floor 22 in the height direction D_H. Accordingly, the at least one holder 60 is configured such that the first hydraulic hoses 70L and the second hydraulic hoses 70R are provided above the body floor 22 in the height direction D_H. In other words, the at least one holder 60 is configured such that the first hydraulic hoses 70L and the second hydraulic hoses 70R do not directly contact the body floor 22. When the work vehicle 1 is used in a severe environment, gravel may accumulate on the body floor 22. In such a case, the first hydraulic hoses 70L and the second hydraulic hoses 70R may be worn away by the gravel, if the first hydraulic hoses 70L and the second hydraulic hoses 70R are directly disposed on the body floor 22. In addition, the first hydraulic hoses 70L and the second hydraulic hoses 70R may be buried in the gravel to be susceptible to damages or detachment from any of the first hydraulic pump 7L, the second hydraulic pump 7R, the first hydraulic motor 30L, and the second hydraulic motor 30R. Among the first support 65s, the second support 66s, the third support 67s, and the fourth support 68s, the third support 67s plays a major role in supporting the first hydraulic hoses 70L above the body floor 22 in the height direction D_H. The fourth support 68s plays a major role in supporting the second hydraulic hoses 70R above the body floor 22 in the height direction D_H.

As shown in FIGS. 9 to 10, the at least one holder 60 allows the first hydraulic hoses 70L and the second hydraulic hoses 70R to be bent below the floor frame 53FS in the height direction D_H. The at least one holder 60 allows the first hydraulic hoses 70L and the second hydraulic hoses 70R to be bent below the first ports 7PL, the second ports 7PR, the third ports 30PL, and the fourth ports 30PR in the height direction D_H. Accordingly, bends of the first hydraulic hoses 70L and bends of the second hydraulic hoses 70R are provided below the floor frame 53FS in the height direction D_H when the cabin 5 closes the front space 2HOL. The bends of the first hydraulic hoses 70L and the bends of the second hydraulic hoses 70R are provided below the first ports 7PL, the second ports 7PR, the third ports 30PL, and the fourth ports 30PR in the height direction D_H. The first clamp 61 plays a major role in allowing the first hydraulic hoses 70L to be bent below the floor frame 53FS in the height direction D_H and allowing the first hydraulic hoses 70L to be bent below the first ports 7PL, the second ports 7PR, the third ports 30PL, and the fourth ports 30PR in the height direction D_H. The second clamp 62 plays a major role in allowing the second hydraulic hoses 70R to be bent below the floor frame 53FS in the height direction D_H and allowing the second hydraulic hoses 70R to be bent below the first ports 7PL, the second ports 7PR, the third ports 30PL, and the fourth ports 30PR in the height direction D_H.

<Advantageous effect of the work vehicle 1>

In this embodiment, as shown in FIG. 5, the body frame 2 of the work vehicle 1 is so small that a distance D1 between the first ports 7PL and the fourth ports 30PR in the width direction D_W is shorter than a first distance DH1 equal to a double of an allowable bending radius of each of the first hydraulic hoses 70L and shorter than a second distance DH2 equal to a double of an allowable bending radius of each of the second hydraulic hoses 70R. Furthermore, in the body frame 2, a distance D2 between the second ports 7PR and the third ports 30PL in the width direction D_W is shorter than the first distance DH1 and shorter than the second distance DH2. Typically, all of the first hose 70L1, the second hose 70L2, a third hose 70R1 and a fourth hose 70R2 are of a kind, then the distance D1 and the distance D2 should be shorter than a double of an allowable bending radius of the hose of the kind. Accordingly, the conventional arrangements of the first hydraulic hoses 70L and the second hydraulic hoses 70R which are shown in JP2022-028355A cannot be used in the work vehicle 1.

However, as shown in FIG. 5, the first hydraulic hoses 70L are bent to connect the third ports 30PL provided at the left side wall 21L and the first ports 7PL that are provided to be closer to the right side wall 21R than the left side wall 21L. Accordingly, a bending radius of each of the first hydraulic hoses 70L can be longer than an allowable bending radius of each of the first hydraulic hoses 70L. More specifically, a bending radius of the first hose 70L1 can be longer than an allowable bending radius of the first hose 70L1. A bending radius of the second hose 70L2 can be longer than an allowable bending radius of the second hose 70L2.

The second hydraulic hoses 70R are bent to connect the fourth ports 30PR provided at the right side wall 21R and the second ports 7PR that are provided to be closer to the left side wall 21L than the right side wall 21R. Accordingly, a bending radius of each of the second hydraulic hoses 70R can be longer than an allowable bending radius of each of the second hydraulic hoses 70R. More specifically, a bending radius of the third hose 70R1 can be longer than an allowable bending radius of the third hose 70R1. A bending radius of the fourth hose 70R2 can be longer than an allowable bending radius of the fourth hose 70R2. Therefore, the first hydraulic hoses 70L and the second hydraulic hoses 70R can be arranged in a small body of the work vehicle 1.

The present application refers to words “include” and derivatives as nonrestrictive terms for description of provision of constituent elements, without exclusion of any other constituent element not referred to in the present application. The same applies to words “have”, “provided with”, and derivatives thereof.

Expressions “member”, “part”, “element”, “body”, and “structure” may have a plurality of meanings indicating a single portion and a plurality of portions.

Ordinal numbers “first”, “second”, and the like are terms for simple distinction among configurations, without having any other meaning (e.g. specific order). For example, provision of a “first element” does not indicate provision of a “second element”, and provision of the “second element” does not indicate provision of the “first element”.

Expressions “substantially”, “approximately”, “about”, and the like indicating degrees may each have a rational deviation not significantly changing a final result. All the numerical values referred to in the present application may be interpreted as including any one of the expressions “substantially”, “approximately”, “about”, and the like.

In the present application, an expression “at least one of A and B” is interpreted to encompass (1) only A, (2) only B, and (3) both A and B.

In view of the above disclosure, the present invention can obviously include various modifications and alterations. The present invention may thus be implemented in any manner different from those specifically disclosed in the present application without departing from the spirit of the preset invention.