Work machine quick coupler and work machine

Abstract

The application provides a quick-change device (1) of a construction machine for realizing quick releasable locking between a main machine (2) and a working accessory (3), comprising: a main body (10) having a front end and a rear end along a longitudinal direction; a locking pin (20) being movable along the longitudinal direction and penetrating the rear end, for releasably locking a rear pin shaft (70) between an outer end of the locking pin (20) and the rear end of the main body (10); a locking block (40) being pivotably arranged at the front end of the main body (10) for switching between an open state and a locking state, in the open state, a front pin shaft (60) connected with the working accessory (3) can enter and exit between the locking block (40) and the front end of the main body (10), in the locking state, the front pin shaft (60) is locked between the locking block (40) and the front end of the main body (10); and a driving mechanism (30) between the locking pin (20) and the locking block (40), comprising a first driving part (31) and a second driving part (32) linearly moving opposite to each other along the longitudinal direction, the first driving part (31) is slidably connected with the locking block (40) for driving the locking block (40) to pivot for switching between the open state and the locking state, in the open state, the front pin shaft (60) can enter and exit between the locking block (40) and the front end of the main body (10), in the locking state, the front pin shaft (60) is locked between the locking block (40) and the front end of the main body (10), the second driving part (32) is used for driving the locking pin (20) to be movable along the longitudinal direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quick-change devices of construction machinery, and particularly to a quick-change device of construction machinery. BACKGROUND

[0002] The quick-change device of construction machinery can realize quick replacement of work tools, save working time, and improve work efficiency. In order to improve safety, the quick-change device of construction machinery currently usually adopts a hydraulic cylinder, a cylinder sleeve of the hydraulic cylinder is hinged to a body, a piston rod is hinged to a movable hook, and the hydraulic cylinder almost directly bears vibration and impact generated during work of the connected work tool, so that the reliability is poor. The reciprocating movement of the hydraulic cylinder drives opening and closing of the movable hook. Once the hydraulic cylinder fails, the accessory parts may fall off, causing damage or scrapping of the work tool, and even causing serious injury and death accidents. SUMMARY

[0003] In view of the above technical defects, the present application provides a quick-change device of construction machinery for realizing quick releasable locking between a main machine and a work tool, comprising: a body having a front end and a rear end along a longitudinal direction; a locking pin movably arranged at the rear end along the longitudinal direction for releasably locking a rear pin shaft for connecting with the work tool between an outer end of the locking pin and the rear end of the body; a locking block pivotably arranged at the front end of the body for switching between an open state and a locked state, in the open state, a front pin shaft for connecting with the work tool can enter and move out between the locking block and the front end of the body, in the locked state, the front pin shaft is locked between the locking block and the front end of the body; and a driving mechanism located between the locking pin and the locking block, comprising a first driving part and a second driving part linearly moving opposite to each other along the longitudinal direction, the first driving part is slidably connected with the locking block for driving the locking block to pivotally switch between the open state and the locked state, in the open state, the front pin shaft can enter and move out between the locking block and the front end of the body, in the locked state, the front pin shaft is locked between the locking block and the front end of the body, the second driving part is used for driving the locking pin to be movable along the longitudinal direction.

[0004] In some embodiments, the locking block is provided with a pivot hole and a sliding groove, a pivot shaft passes through the pivot hole and transverse sides of the body, the locking block is pivotable in the body about the pivot shaft, and a terminal part of the first driving part is slidable along the sliding groove.

[0005] In some embodiments, the sliding groove comprises a linear segment away from the pivot hole, in the case that the locking block is in the locked state, the terminal of the first driving part is at the linear segment, and the linear segment is horizontal.

[0006] In some embodiments, the sliding groove comprises an arcuate segment adjacent to the pivot hole, in the case that the locking block is in the open state, the terminal of the first driving part is in the arcuate segment.

[0007] In some embodiments, the end of the first driving part slides along the arc-shaped segment so that the locking block pivots.

[0008] In some embodiments, the quick-change device comprises a reset elastic member between the main body and the locking block, for biasing the locking block to pivot towards the front pin shaft.

[0009] In some embodiments, the main body comprises a mounting seat provided with a mounting hole, the mounting seat is fixed in the main body, the end part of the first driving part is movably mounted in the mounting hole along the longitudinal direction, and the reset elastic member is arranged between the mounting seat and the locking block.

[0010] In some embodiments, the end part of the first driving part comprises a transverse push rod and a longitudinal push rod connected with the transverse push rod, the transverse push rod is slidably arranged in the sliding groove, the longitudinal push rod is longitudinally movable along the mounting hole, and the reset elastic member is sleeved on the longitudinal push rod, with two ends respectively abutting against the mounting seat and the transverse push rod, for biasing the transverse push rod to drive the locking block to pivot towards the front pin shaft.

[0011] In some embodiments, the main body comprises an upper coupling member for releasable fastening connection with the host machine, and a driving mechanism slidably arranged on the upper coupling member; and a lower coupling member for releasable fastening connection with the working accessory.

[0012] In some embodiments, the upper coupling member comprises a front connecting pin shaft at the front end and a rear connecting pin shaft at the rear end, for releasable fastening connection with the host machine respectively; or the front pin shaft and the rear pin shaft are arranged at the front end and the rear end of the lower coupling member respectively, for releasable fastening connection with the working accessory respectively.

[0013] In some embodiments, the upper coupling member is provided with an elongated slot on each of the two lateral sides, and the first driving part is provided with a limiting column on each of the two lateral sides, and the two limiting columns are slidably arranged along the two elongated slots to limit the longitudinal movement range of the first driving part.

[0014] In some embodiments, the driving mechanism comprises a bidirectional oil cylinder of a first oil cylinder and a second oil cylinder, the end part of the first driving part is drivingly connected with the first oil cylinder, and the locking pin is drivingly connected with the second oil cylinder, and the bidirectional oil cylinder is, for example, H-shaped.

[0015] In some embodiments, the locking block comprises a transverse connecting part and two transversely spaced hook-shaped parts connected through the transverse connecting part, the two hook-shaped parts are connected through the transverse connecting part, the arc-shaped recess is formed on the top surface of the hook-shaped part, each hook-shaped part is provided with a pivot hole and a sliding groove, and the end part of the first driving part is slidably arranged along the sliding groove between the two hook-shaped parts.

[0016] In another aspect, the present application also provides an engineering machine, comprising a main machine, a working accessory and an engineering machine quick-change device, the engineering machine quick-change device being releasably locked with the main machine and the working accessory respectively.

[0017] The double locking of the front and rear pin shafts of the quick-change device and the working accessory is realized by the driving mechanism, which improves the locking safety of the working accessory, and even if the driving mechanism fails or is damaged, the locking safety between the locking block and the working accessory can still be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] According to the convention, the various features of the following described drawings are not necessarily drawn to scale. The size of various features and elements of the drawings can be enlarged or reduced in order to more clearly represent the embodiments of the present application.

[0019] Figure 1 Fig. 1 is a schematic diagram of the connection of the main machine, the quick-change device and the working accessory of the engineering machine;

[0020] Figure 2 Fig. 2 is an exploded schematic diagram of the components of the quick-change device;

[0021] Figure 3 Fig. 3 is a schematic diagram of the internal structure of the locking block of the quick-change device in the locked state;

[0022] Figure 4 Fig. 4 is a schematic diagram of the internal mechanism of the locking block of the quick-change device in the open state;

[0023] Figure 5 Fig. 5 is a schematic diagram of the structure of the locking block of the quick-change device;

[0024] Figure 6 Fig. 6 is a schematic diagram of the structure of the upper coupling piece of the main body of the quick-change device;

[0025] Figure 7 Fig. 7 is a schematic diagram of the structure of the end piece of the first driving part of the quick-change device; and

[0026] Figure 8 Fig. 8 is a schematic diagram of the assembly of the upper coupling piece and the lower coupling piece of the quick-change device.

[0027] Reference signs: 1, engineering machine quick-change device; 2, main machine; 3, working accessory; 10, main body; 20, locking pin; 40, locking block; 41 sliding groove; 42, transverse connecting part; 43, hook-shaped part; 411, straight section; 412, arc section; 44, pivoting hole; 30, driving mechanism; 31 first driving part; 32, second driving part; 60, front pin shaft; 70, rear pin shaft; 46, arc-shaped recess; 131, mounting hole; 13 mounting seat; 50, reset elastic member; 310, end part of first driving part; 311, transverse push rod; 312, longitudinal push rod; 11, upper coupling part; 12, lower coupling part; 111, front connecting pin shaft; 112, rear connecting pin shaft; 60, front pin shaft; 70, rear pin shaft; 14, elongated slot; 33, first oil cylinder; 34, second oil cylinder. DETAILED DESCRIPTION

[0028] The skilled person will understand the technical advantages of the various embodiments by reading the following detailed description of the embodiments with reference to the accompanying drawings. Each of the above-discussed embodiments, both individually and in various combinations, is within the scope of the present application. It should be noted that in the description of the present application, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and do not require the present application to be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "front", "rear", "left", "right", "upper", "lower" used in the description of the present application refer to the directions in the drawings, and the terms "inner", "outer" refer to the directions towards or away from the geometric center of a particular component, and "releasable" means "detachable" or "separable".

[0029] The present application is an engineering machine, such as Figure 1 As shown, the engineering machine includes a main machine 2, a working accessory 3 and an engineering machine quick-change device 1, the upper part of the quick-change device 1 is releasably connected to the main machine 2, and the lower part of the quick-change device 1 is releasably connected to the working accessory 3, thereby realizing quick and releasable connection between the main machine 2 and the working accessory 3 through the quick-change device 1.

[0030] In some embodiments of the present application, as Figures 2-4As shown, the quick release locking between the host 2 and the work implement 3 is achieved by the quick change device 1, which comprises a main body 10, a locking pin 20, a driving mechanism 30 and a locking block 40. The main body 10 has a front end and a rear end along the longitudinal direction. The locking pin 20 penetrates a longitudinal installation hole of the rear end and is movable along the longitudinal direction, so that a rear pin shaft 70 is releasably locked between the outer end of the locking pin 20 and the rear end of the main body 10, and the rear pin shaft 70 can be detachably or fixedly connected with the work implement 3. The locking block 40 is pivotally arranged at the front end of the main body 10, so that the locking block 40 switches between an open state and a locked state during pivoting, in the open state, a front pin shaft 60 connected with the work implement 3 can enter and exit between the front end of the main body 10 and the locking block 40, and in the locked state, the front pin shaft 60 is locked between the front end of the main body 10 and the locking block 40, and the front pin shaft 60 can be detachably or fixedly connected with the work implement 3. As shown Figure 2 As shown, the driving mechanism 30 is arranged between the locking pin 20 and the locking block 40, comprising a first driving part 31 and a second driving part 32 linearly moving opposite to each other along the longitudinal direction, the first driving part 31 is slidably connected with the locking block 40 to drive the locking block 40 to pivot in the main body 10, adjusting the opening size between the locking block 40 and the front end of the main body 10, so that the locking block 40 switches between the open state and the locked state, and the second driving part 32 drives the locking pin 20 to be movable along the longitudinal direction.

[0031] As shown Figure 3 The first driving part 31 moves outward along the longitudinal direction to push the locking block 40 to pivot counterclockwise in the main body 10, reducing the opening size between the locking block 40 and the front end of the main body 10, so that the front pin shaft 60 is locked between the locking block 40 and the front end of the main body 10, and the locking block 40 is in the locked state; at the same time, the second driving part 32 drives the locking pin 20 to extend outward along the longitudinal direction, so that the rear pin shaft 70 is locked between the locking pin 20 and the rear end of the main body 10; as shown Figure 4 The first driving part 31 moves inward along the longitudinal direction to pull the locking block 40 to pivot clockwise in the main body 10, thereby increasing the opening size between the locking block 40 and the front end of the main body 10, so that the front pin shaft 60 is unlocked, and the locking block 40 is in the open state, and the front pin shaft 60 can enter and exit between the front end of the main body 10 and the locking block 40; at the same time, the second driving part 32 drives the locking pin 20 to move inward along the longitudinal direction, so that the locking pin 20 is separated from the rear pin shaft 70, and the rear pin shaft 70 is unlocked.

[0032] In some embodiments of the present application, as shown Figure 5As shown, the locking block 40 is provided with a pivot hole 44 and a sliding slot 41, a pivot shaft 45 passes through the pivot hole 44 and the lateral two side walls of the main body 10, and the locking block 40 is pivotably installed on the main body 10, and the end of the first driving part 31 is slidable along the sliding slot 41 to drive the locking block 40 to pivot around the pivot shaft 45.

[0033] In some embodiments of the present application, as shown in Figure 5 As shown, the locking block 40 includes a transverse connecting portion 42 and two transversely spaced hook-shaped portions 43 connected by the transverse connecting portion 42, the two hook-shaped portions 43 are connected by the transverse connecting portion 42, and an arc-shaped recess 46 is formed on the top surface of the hook-shaped portion 43, each hook-shaped portion 43 is provided with a pivot hole 44 and a sliding slot 41, and the end part 310 of the first driving part 31 is slidable along the two sliding slots 41 between the two hook-shaped portions 43.

[0034] In some embodiments of the present application, as shown in Figure 5 As shown, the sliding slot 41 includes a straight segment 411 away from the pivot hole 44, the end of the first driving part 31 is located at the straight segment 411 when the locking block 40 is in the locked state, and the straight segment 411 is horizontal. As shown in Figure 3 So that the end of the first driving part 31 acts on the vertical upward force F1 of the straight segment 411 and the vertical downward component F2 of the force F2 exerted on the locking block 40 by the front pin shaft 60 2Y The same size and opposite direction, so that the locking block 40 reaches force balance in the vertical direction; the horizontal force F3 exerted on the locking block 40 by the pivot shaft 45 and the horizontal component F4 of the force F2 exerted on the locking block 40 by the front pin shaft 60 2X The same size and opposite direction, so that the locking block 40 reaches force balance in the horizontal direction, so that the locking block 40 is in a self-locking state, even if the first driving part 31 fails, due to the force balance of the locking block 40 in the horizontal longitudinal direction, the locking block 40 will still remain in the self-locking state, reducing the risk of accidental unlocking.

[0035] In some embodiments of the present application, as shown in Figure 5 As shown, the sliding slot 41 includes an arc-shaped segment 412 adjacent to the pivot hole 44, and the end of the first driving part 31 slides along the arc-shaped segment 412 to pivot the locking block 40. Optionally, the end of the first driving part 31 is located in the arc-shaped segment 412 when the locking block 40 is in the open state.

[0036] In some embodiments of the present application, as shown in Figure 2 As shown, the main body 10 is provided with an elongated slot 14 on each lateral side, and the first driving part 31 is provided with a limiting column 311 on each lateral side, and the two limiting columns 311 are respectively slidable along the two elongated slots 14 to limit the longitudinal movement range of the first driving part 31.

[0037] In some embodiments of the present application, as shown in Figure 2 and 3 , the quick-change device 1 comprises a reset elastic member 50 between the main body 10 and the locking block 40, the reset elastic member 50 is used to bias the locking block 40 to pivot towards the front pin shaft 60, for strengthening the locking between the front pin shaft 60 and the locking block 40, preventing the locking block 40 from being accidentally unlocked due to the failure of the first driving part 31, the reset elastic member 50 is for example a spring.

[0038] In some embodiments of the present application, as shown in Figure 2 and 6 , the main body 10 comprises a mounting seat 13 provided with a mounting hole 131, the mounting seat 13 is fixed in the main body 10, the mounting hole 131 is provided with a bearing 132, the end part 310 of the first driving part 31 is installed in the bearing 132 in the mounting hole 131 and is longitudinally movable, the reset elastic member 50 is arranged between the mounting seat 13 and the locking block 40 to resist the locking block 40 away from the front pin shaft 60.

[0039] In some embodiments of the present application, as shown in Figure 7 , the end part 310 of the first driving part 31 comprises a transverse push rod 311 and a longitudinal push rod 312 connected with the transverse push rod 311, the transverse ends of the transverse push rod 311 are respectively slidably arranged in the two sliding grooves 41, the longitudinal push rod 312 is longitudinally movable along the mounting hole 131, the reset elastic member 50 is sleeved on the longitudinal push rod 312 and its two ends are respectively abutted against the mounting seat 13 and the transverse push rod 311, for biasing the transverse push rod 311 to drive the locking block 40 to pivot towards the front pin shaft 60. Optionally, the transverse push rod 311 passes through the through hole 316 on the longitudinal push rod 312, and is fixedly connected with the longitudinal push rod 312 through the connecting piece 314.

[0040] In some embodiments of the present application, as shown in Figures 2-4 , the driving mechanism 30 comprises a bidirectional oil cylinder, the bidirectional oil cylinder comprises a first oil cylinder 33 and a second oil cylinder 34, the first driving part 31 comprises the first oil cylinder 33, the end part 310 of the first driving part 31 is drivingly connected with the first oil cylinder 33, the second driving part 32 comprises the second oil cylinder 34, the locking pin 20 is drivingly connected with the second oil cylinder 34, the bidirectional oil cylinder is for example H-shaped. Optionally, the two first oil cylinders 33 are connected with the end part 310 through the push plate 15.

[0041] In some embodiments of the present application, as shown in Figure 8As shown, the main body 10 comprises an upper coupling member 11 and a lower coupling member 12, the upper coupling member 11 is releasably fastened with the host machine 2, and the driving mechanism 30 is slidably arranged on the upper coupling member 11; the lower coupling member 12 is releasably fastened with the working accessory 3. Optionally, the upper coupling member 11 comprises a front connecting pin shaft 111 at the front end and a rear connecting pin shaft 112 at the rear end, for being releasably fastened with the host machine 2 respectively; the front pin shaft 60 and the rear pin shaft 70 are arranged at the front end and the rear end of the lower coupling member 12 respectively, for being releasably fastened with the working accessory 3 respectively. Optionally, the lower coupling member 12 can be arranged on the working accessory 3. Optionally, as shown, Figure 6 As shown, two elongated grooves 14 are arranged at the two lateral sides of the upper coupling member 11 respectively.

[0042] On the other hand, the present application also provides an engineering machine, which comprises a host machine 2, a working accessory 3 and the aforementioned engineering machine quick-change device 1, and the engineering machine quick-change device 1 is releasably locked with the host machine 2 and the working accessory 3 respectively.

[0043] In the present application, an engineering machine quick-change device is provided, which realizes the double locking of the quick-change device and the front and rear pin shafts for being connected with the working accessory through the driving mechanism driving the locking block and the locking pin, and the front pin shaft can realize mechanical self-locking after being locked in place, which improves the locking safety of the quick-change device, and even if the driving mechanism fails or is damaged, the locking safety between the locking block and the working accessory can still be ensured.

[0044] The foregoing description of the application illustrates and describes some exemplary embodiments. Various additions, modifications, changes, etc. can be made to these exemplary embodiments without departing from the spirit and scope of the application. It is intended that all matter contained in the above description, or shown in the accompanying drawings, be interpreted as illustrative and not in a limiting sense. In addition, the present application only shows and describes selected embodiments of the present application, but the present application can be used in various other combinations, modifications and environments and can be changed or modified within the scope of the inventive concept as expressed herein, in accordance with the above teachings, and / or within the skill or knowledge of those skilled in the relevant art. Furthermore, certain features and characteristics of each embodiment can be selectively interchanged and applied to other illustrated and non-illustrated embodiments of the present application.

Claims

1. A quick-change device (1) for engineering machinery, used to achieve quick and releaseable locking between the main unit (2) and the working attachment (3), comprising: The main body (10) has a front end and a rear end along the longitudinal direction; A locking pin (20) is movably arranged longitudinally at the rear end for releasably locking a rear pin (70) for connection with a work attachment between the outer end of the locking pin (20) and the rear end of the body (10). A locking block (40), pivotally arranged at the front end of the body (10) to switch between an open state and a locked state, wherein in the open state a front pin (60) for connection with the working attachment (3) can enter and exit between the locking block (40) and the front end of the body (10); and in the locked state the front pin (60) is locked between the locking block (40) and the front end of the body (10); and The drive mechanism (30), located between the locking pin (20) and the locking block (40), includes a first drive part (31) and a second drive part (32) that move linearly in opposite directions along the longitudinal direction. The first drive part (31) is slidably connected to the locking block (40) to drive the locking block (40) to pivot, and the second drive part (32) is used to drive the locking pin (20) to move along the longitudinal direction. The locking block (40) is provided with a pivot hole (44) and a slide groove (41). The pivot shaft (45) passes through the pivot hole (44) and the lateral sides of the main body (10). The locking block (40) is pivotable in the main body (10) around the pivot shaft (45). The end part (310) of the first drive part (31) is slidable along the slide groove (41). The end part (310) of the first drive part (31) includes a transverse push rod (311) and a longitudinal push rod (312) connected to the transverse push rod (311). The transverse push rod (311) is slidably arranged in the slide groove (41).

2. The quick-change device (1) for engineering machinery according to claim 1, wherein the slide (41) includes a straight segment (411) away from the pivot hole (44), and when the locking block (40) is in the locked state, the end of the first drive part (31) is located at the straight segment (411), and the straight segment (411) is horizontal.

3. The quick-change device (1) for engineering machinery according to claim 1, wherein the slide (41) includes an arc-shaped segment (412) adjacent to the pivot hole (44), and when the locking block (40) is in the open state, the end of the first drive part (31) is in the arc-shaped segment (412).

4. The quick-change device (1) for engineering machinery according to claim 3, wherein the end of the first drive unit (31) slides along the arc segment (412) to cause the locking block (40) to pivot.

5. The quick-change device (1) for engineering machinery according to claim 1, comprising a reset elastic element (50) between the main body (10) and the locking block (40) for biasing the locking block (40) to pivot toward the front pin (60).

6. The quick-change device (1) for engineering machinery according to claim 5, wherein the main body (10) includes a mounting seat (13) having a mounting hole (131), the mounting seat (13) being fixed in the main body (10), the end component (310) of the first drive unit (31) being longitudinally movably mounted in the mounting hole (131) along the mounting hole (131), and the reset elastic element (50) being arranged between the mounting seat (13) and the locking block (40).

7. The quick-change device (1) for engineering machinery according to claim 6, wherein the longitudinal push rod (312) is longitudinally movable along the mounting hole (131), and the reset elastic element (50) is fitted on the longitudinal push rod (312), with its two ends abutting against the mounting seat (13) and the transverse push rod (311) respectively, for biasing the transverse push rod (311) to drive the locking block (40) to pivot toward the front pin (60).

8. The quick-change device (1) for engineering machinery according to claim 1, wherein the main body (10) comprises: The upper coupling member (11) is releasably fastened to the host (2), and the drive mechanism (30) is slidably disposed on the upper coupling member (11); as well as The lower coupling member (12) is used to releasably fasten to the working attachment (3).

9. The quick-change device for engineering machinery (1) according to claim 8, wherein... The upper coupling member (11) includes a front connecting pin (111) at the front end and a rear connecting pin (112) at the rear end, for releasably fastening to the host (2); or The front pin (60) and the rear pin (70) are respectively arranged at the front end and the rear end of the lower coupling member (12) for releasably fastening the working attachment (3) to each other.

10. The quick-change device (1) for engineering machinery according to claim 8 or 9, wherein the upper coupling member (11) is provided with a slender groove (14) on both sides of the lateral direction, and the first driving part (31) is provided with a limiting post on each side of the lateral direction, and the two limiting posts are slidable along the two slender grooves (14) to limit the longitudinal movement range of the first driving part (31).

11. The quick-change device (1) for engineering machinery according to claim 1, wherein the drive mechanism (30) includes a bidirectional hydraulic cylinder consisting of a first hydraulic cylinder (33) and a second hydraulic cylinder (34), the first drive part (31) includes the first hydraulic cylinder (33), the end part (310) of the first drive part (31) is drivably connected to the first hydraulic cylinder (33), the second drive part (32) includes the second hydraulic cylinder (34), and the locking pin (20) is drivably connected to the second hydraulic cylinder (34).

12. The quick-change device (1) for engineering machinery according to claim 1, wherein the locking block (40) includes a transverse connecting part (42) and two transversely spaced hook-shaped parts (43) connected by the transverse connecting part, the two hook-shaped parts (43) are connected by the transverse connecting part (42), the top surface of each hook-shaped part (43) is provided with an arc-shaped recess (46) for receiving the front pin (60), each hook-shaped part (43) is provided with the pivot hole (44) and the slide groove (41), and the end part (310) of the first driving part (31) is slidable along the slide groove (41) between the two hook-shaped parts (43).

13. An engineering machine, comprising a main unit (2), a working attachment (3), and an engineering machine quick-change device (1) according to any one of claims 1-12, wherein the engineering machine quick-change device (1) is releasably locked to the main unit (2) and the working attachment (3).

Images