WORKING DEVICE FOR AN EXCAVATOR

Description

The invention relates to a working device for an excavator according to the generic term of claim 1.

DE 20 2021 101 016 U 1 discloses a working device for an earth-moving machine, in particular an excavator, with a digging tool designed as a bucket or shovel. A quick-change device is provided for the interchange-able arrangement of the working device on a handle of an excavator. This quick-change device comprises two changer halves, whereby one changer half is attached to the handle of the excavator and the second changer half is attached to the bucket or shovel. This second changer half consists of two bearing blocks arranged at a distance from each other, which are welded to an outer side, in particular an upper wall section, of the bucket. Two locking bolts are fixed between the two bearing blocks. Locking elements of the first changer half engage with these locking bolts of the second changer half to connect and lock the two changer halves to each other.

The invention is based on the object of creating a working device for an excavator in which increased process forces are achieved when working with the working device.

This object is solved by a working device in which a drive device is provided in a base body, which drives a tool and locking bolts from a first changer half of a quick-change device are integrated in a base body of the working device. By integrating the locking bolts in the base body of the working device, the overall height of the implement can be reduced compared to the working devices known from the prior art, at least by the height of the bearing blocks or bearing flanges welded onto the base body of the working device to accommodate the locking bolts.

By reducing the overall height of the working device, an effective lever arm between a coupling device, which is connected to an excavator handle, and a tool of the working device can be reduced. This makes it possible to increase the acting process forces of the working device, for ex-Page ample when digging, milling or compacting. In addition, reducing the overall height of the working device has the advantage that shortening the lever arm can reduce the load on the working device while maintaining the same process forces for controlling the working device. By integrating the locking bolts into the base body of the working device, it is also possible to stiffen the base body, thereby increasing the reliability of the working device.

Advantageously, it is provided that the locking bolts are positioned within an envelope of the base body and are attached to the base body. This not only makes it possible to achieve a compact design and a reduced height of the base body, but also to stiffen the base body at the same time.

It is preferable that the locking bolts are integrated into the base body, in particular that they are non-detachable from the base body. The installation height of the working device is essentially determined by the base body with the tool arranged on it, such as grippers, compressor plates, drills, milling cutters or the like.

Furthermore, in order to reduce the installation height of the working device, it is preferable that any rotary drives between the working device and a first changer half assigned to the working device for rotational alignment of the tool are omitted, since the second changer half or the changer half on the side of the handle has an integrated rotary drive.

Furthermore, it is preferably provided that the overall height of the base body of the working device is formed by a distance between the tool and an upper wall section or an upper wall of the base body or at least an upper end face of the base body and that the locking bolts are positioned within the overall height of the base body of the working device.

According to a preferred embodiment of the working device, it is provided that the base body has two side walls that are spaced apart from one another and the locking bolts are fastened between the side walls, in particular fastened in a non-replaceable manner. This makes it possible to retain the basic structure of a working device and to connect the locking bolts directly to the side walls of the base body. The first changer half is thus connected to the base body in a non-rotatable manner.

According to a further preferred embodiment of the working device, it is provided that the base body has a recess in an upper wall or in an upper wall section or between side walls of the base body, which recess extends within the upper wall or the upper wall section or between the side walls of the base body. This embodiment has the advantage that the overall construction height can be reduced by the bearing blocks or bearing flanges known in the prior art and welded or screwed on to accommodate the locking bolts. The recess and the locking bolts extending therein also allow the base body to be reinforced or stiffened in its upper area for connection to the second changer half of the quick-change device.

Furthermore, it is preferable that the base body of the working device surrounds a receiving space that is open on one side and open towards the tool at the bottom.

The basic body of the working device can be formed by a housing which is at least partially closed opposite the tool, with the locking bolts being arranged between the side walls of the housing. For example, a housing can be provided in a compressor to accommodate the drive device for the compressor plate designed as a tool, whereby this housing is open towards the compressor plate and essentially closed on the opposite side and the side walls of the housing are designed to accommodate locking bolts extending between them. This allows hydraulic and/or electrical lines to be routed from the first changer half within the housing and/or the tool itself, thereby providing protection against mechanical damage, compared to the exposed external routing of the prior art.

According to a further advantageous embodiment of the invention, it is provided that the locking bolts are fixed, preferably welded, to side wall sections of the recess or to side walls of the base body bounding the recess. This enables the base body to be reinforced without restricting the basic function of the working device.

Furthermore, it is preferable that the first changer half comprises two locking bolts arranged at a distance from one another, which are fastened, in particular welded, pinned or screwed between side wall sections, are integrated into side walls of the base body and/or the side wall sections of the first changer half form part of the base body. As a result, the first changer half and the base body can be formed in one piece and/or integrated into one another.

The invention and other advantageous embodiments and further embodiments thereof are described and explained in more detail below with reference to the examples shown in the drawings. The features to be taken from the description and the drawings can be used individually or in any combination in accordance with the invention. It shows:

FIG. 1 a schematic side view of an excavator with a working device,

FIG. 2 a perspective view of an attachment device for connecting to the handle as shown in FIG. 1,

FIG. 3 a schematic side view of the attachment device shown in FIG. 2,

FIG. 4 a perspective view of a working device,

FIG. 5 a schematic side view of the working device as shown in FIG. 4,

FIG. 6 a schematic view from the front of the working device as shown in FIG. 4, and

FIG. 7 a schematic sectional view along the line X-X in FIG. 6.

FIG. 1 shows a schematic side view of an excavator 11. The excavator 11 comprises a basic machine 13 with a boom 12, which is hinged together at the end with a handle 14. The boom 12 is moved up and down by a lifting cylinder 19. The boom 12 comprises at least one handle cylinder 18 for actuating a pivoting movement of the handle 14. At least one pressure cylinder 16 is provided on the handle 14, by means of which an attachment device 21 provided on the handle 14 can be actuated. The attachment device 21 is pivotably mounted at the end of the handle 14 in an attachment axis 17. This attachment device 21 can comprise a rotating device 22 with a rotary drive 24 and a coupling, in particular a quick-change device 23. The rotating device 22 comprises a drive housing 66. The quick-change device 23 can be rotated relative to the drive housing 66 along an axis of rotation 26 by the rotary drive 24. A working device 25 is interchangeably provided on the quick-change device 23. The quick-change device 23 has a first changer half 41, which is provided on the side of the working device, and a second changer half 42, which is provided on the rotary drive 24. The second changer half 42 comprises at least one controllable latch 56. After positioning a latch receiver 59 on the first locking bolt 55 of the first changer half 41, the latch 56 can engage behind the second locking bolt 55 of the first changer half 41 and connect and lock the first and second changer halves 41, 42. Such a quick-change device is known, for example, from DE 20 2021 101 016U 1.

A swivel kinematics 27 is provided to control a swivel movement of the attachment device 21. This comprises a deflector 28, which is articulated to the handle 14 at one end on a deflector axis 29. Furthermore, the swivel kinematics 27 comprises a changer 31, which is connected at one end to the deflector 28 via a common swivel axis 35. At the opposite end, the changer 31 engages with a coupling device 33. This coupling device 33 is a component of the attachment device 21 or is mounted on the attachment device 21. Preferably, the drive housing has a cover surface extending at least in sections, on which the coupling device 33 is provided. The pressure cylinder 16, in particular a piston rod of the pressure cylinder 16, engages on the swivel axis 35 of the swivel kinematics 27.

FIG. 2 shows a perspective view of the attachment device 21. FIG. 3 shows a schematic side view of this attachment device 21 as shown in FIG. 2.

The coupling device 33 comprises two cheeks 36 arranged at a distance from one another. The cheeks 36 can be connected to at least one connecting plate 34, which extends between the cheeks 36. The at least one connecting plate 34 can rest against an upper side of the rotating device 22 and preferably be detachably fastened thereto. Each cheek 36 comprises a coupling bearing point 37 and a mounting bearing point 38. The coupling bearing point 37 and the mounting bearing point 38 are arranged offset in height relative to one another. The attachment bearing point 38 is recessed relative to the coupling bearing point 37. The attachment bearing point 38 can also be offset in the direction of a plane of rotation 39 of the rotary device 22 or lie in this plane of rotation 39. The attachment bearing point 38 is offset laterally outwards relative to the attachment device 21, in particular the rotary device 22, or is as-signed to an end face of the rotary device 22.

FIG. 4 shows a perspective view of the working device 25 as shown in FIG. 1. FIG. 5 shows a schematic side view of the working device 25. FIG. 6 shows a rear view and FIG. 7 shows a sectional view along the line X-X in FIG. 6.

This working device 25 comprises a base body 44. A tool 45 is provided on the base body 44. This tool 45 is designed, for example, as a compressor plate and is provided on an underside of the base body 44.

In this working device 25, the base body 44 is designed, for example, as a housing 71 that is open on at least one side or as a housing 71 that is open on one side, in particular downwards. This housing 71 comprises side walls 47, 48, as well as an upper wall 49 and a rear wall 51 as well as a front wall 52. The housing 71 is open at the bottom due to the walls. A drive device 72 is schematically provided in the housing 71 in a broken line. This drive device 72 is coupled to the tool 45. This working device 25 is, for example, a compressor. The drive device 72 comprises a motor to drive the tool 45 in the form of a compressor plate.

The side walls 47, 48 of the base body 44 extend above the upper wall 49. Locking bolts 55 are arranged between the side walls 47, 48 of the housing 71. The locking bolts 55 arranged between the side walls 47, 48 of the housing 71 form the first changer half 41. This first changer half 41 is not formed separately as an adapter plate. This first changer half 41 is integrated into the housing 71 of the drive device 25, or firmly connected thereto, in particular provided in one piece. Thus, the first changer half 41 is non-rotatably connected to the housing 71. In this embodiment, it is provided that the original height of the side walls 47, 48 of the housing 71 is retained and the upper wall 49 is arranged recessed relative to an upper end face of the side walls 47, 48 or a recess 57 is provided in their upper wall 49. The outer side walls 47, 48 of the housing 71 form an envelope 61. The locking bolts 55 are fixed to the base body 44 inside the envelope 61 or adjacent to the envelope 61 from the inside. As a result, the locking bolts 55 can be positioned between the side walls 47, 48 and thus be integrated within the base body 44.

If the length of the locking bolts 55 requires a wider extension than the housing 71 in order to securely grip and lock them through the second changer half 42, the housing 71 can also extend laterally beyond the side wall sections 58 on the side walls 47, 48. If the housing 71 is wider than the necessary length of the locking bolts 55, the upper wall 49 can also comprise a recess in which the locking bolts 55 are positioned or integrated. Provided that the width of the working device 25 corresponds to the length of the locking bolts 55, the side wall sections 58 are part of the side walls 47, 48 of the base body 44.

By integrating the locking pins 55 or the first changer half 41 into the upper wall 49 or the upper wall section of the base body 44, a stiffening of the working device 25 can also be achieved.

The embodiments described above also apply to other working devices 25, which are listed below by way of example but not exhaustively: Milling machine, hydraulic hammer, grab, vacuum magnet device, electro-magnetic device, grading beam, sweeper roller, blade separator, shears, jaw crusher or the like.