Unhooking-free hanging basket for hoisting engineering truck

Abstract

The invention discloses an unhooking-free hanging basket for hoisting an engineering vehicle. The unhooking-free hanging basket comprises a bearing bottom plate, a truss and a hoisting structure, a hoisting lug is arranged on the truss, and the hoisting lug is fixedly connected with the ship unloader through a hoisting structure; the trusses comprise short side trusses and long side trusses, the short side trusses are independently erected on the short side of the bearing bottom plate, and the long side trusses are oppositely erected on the long side of the bearing bottom plate; the long side trusses are separated from the bearing bottom plate; the long side of the bearing bottom plate is movably connected with a long side truss through a first lead screw; stable sleeves are arranged on the trusses on the opposite sides, and the stable sleeves can be fixedly arranged on hubs of the engineering truck in a sleeving mode; a second lead screw for driving the stable sleeve to move is arranged on the outer wall of the closed end of the stable sleeve; the problem that an existing automatic unhooking device is unstable in hooking / unhooking operation is solved, and meanwhile the problems that an existing device is not conveniently applied to hoisting of various types of engineering vehicles, and the stability effect of a hoisting carrier on the engineering vehicles is poor in the hoisting process are solved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering vehicle hoisting equipment, and in particular to a hook-free hanging basket for engineering vehicle hoisting. Background Art

[0002] When unloading dry bulk cargo, it is necessary to hoist in an engineering vehicle for cabin cleaning to gather the remaining cargo that cannot be grabbed by the grab bucket at the bottom of the cabin and in the dead corners of the cabin to the bottom of the hatch for further unloading operations.

[0003] In the prior art, after the engineering vehicle for clearing the cabin is hoisted into the bottom of the cabin, the automatic unhooking process is not smooth, and human assistance is often required. However, it is very easy for workers to enter the deep of the cabin and cause safety accidents. In order to solve such problems, existing hoisting equipment is often equipped with sensors, control systems and actuators, which can monitor the hoisting status and perform the unhooking action at the appropriate time, which can greatly improve work efficiency.

[0004] However, the existing automatic uncoupling devices have complicated operating steps and are difficult to achieve full automation; moreover, accidental uncoupling and failure to uncoupling may occur during the uncoupling process, posing a major safety hazard. Summary of the invention

[0005] The purpose of the present invention is to provide a hook-free hanging basket for lifting engineering vehicles, so as to avoid the problem of unstable hooking / unhooking operation of existing automatic unhooking devices, and at the same time solve the problem that the existing devices are not convenient for applying to various types of engineering vehicle lifting, and the lifting carrier has a poor stabilizing effect on the engineering vehicle during the lifting process.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] The present invention provides a hook-free hanging basket for lifting engineering vehicles, comprising: a hanging basket main body, which comprises a bearing bottom plate and a truss surrounded by three sides arranged on the bearing bottom plate, the truss is provided with a lifting ear, and the lifting ear is fixedly connected to the ship unloader through a lifting structure; wherein the truss comprises a short side truss and a long side truss, the short side truss stands independently on the short side of the bearing bottom plate, and the long side truss stands opposite to the long side of the bearing bottom plate; the long side truss is separately arranged from the bearing bottom plate so that the spacing of the long side trusses located on the opposite side is adjustable; the long side of the bearing bottom plate is movably connected to the long side truss through a first screw, the end of the first screw is axially connected to the bearing bottom plate, and the long side truss is expanded outward along the width direction of the bearing bottom plate by rotating the first screw; the truss located on the opposite side is provided with a stabilizing sleeve that can be extended oppositely, and the stabilizing sleeve can be fixed on the wheel hub of the engineering vehicle; the closed end outer wall of the stabilizing sleeve is provided with a second screw for driving its movement.

[0008] Furthermore, the short side trusses and the long side trusses both include horizontal beams, vertical beams, and support beams; wherein the horizontal beams are arranged parallel to the sides of the bearing bottom plate, the vertical beams are upright on the horizontal beams, and the support beams are inclined between the horizontal beams and the vertical beams.

[0009] Furthermore, the peripheral side of the supporting bottom plate is convex outwardly to form a step, and the cross beam and the step are of equal width.

[0010] Furthermore, a wedge-shaped climbing ramp is provided at the end of the bearing bottom plate for guiding the engineering vehicle to enter, and the climbing ramp is located on the opposite side of the short side truss, and the wedge-shaped surface of the climbing ramp is an outwardly convex curved surface.

[0011] Furthermore, the long side truss and the load-bearing bottom plate are connected by a load-bearing column, and the load-bearing column and the first lead screw jointly bear the load of the load-bearing bottom plate; wherein one end of the load-bearing column is fixedly arranged on the load-bearing bottom plate, and the other end of the load-bearing column penetrates the long side truss to form a movable connection; a sliding connection is formed between the load-bearing column and the long side truss by a sliding sleeve, and the outer edges of both ends of the sliding sleeve protrude and are clamped on both sides of the bottom crossbeam of the long side truss;

[0012] The end of the load-bearing column is provided with a circumferentially outwardly convex limiting outer edge.

[0013] Furthermore, a mounting side plate located between the crossbeam and the support beam is provided on the long side truss, and the second lead screw is axially supported on the mounting side plate; wherein, a driving motor is provided on one side of the mounting side plate for driving the second lead screw, and a stabilizing sleeve is provided on the other side of the mounting side plate for fixing with the second lead screw; the driving motor and the crossbeam are fixedly connected by an auxiliary frame.

[0014] Furthermore, two stabilizing sleeves are symmetrically provided on the long side trusses on either side.

[0015] Furthermore, two lifting ears are symmetrically provided on the long side trusses on either side.

[0016] Furthermore, the first lead screw and the cross beam are threadedly connected via a threaded sleeve penetrating therethrough.

[0017] Furthermore, a fixed pad is provided on the bearing base plate, and a convex ridge that can be locked with the engineering vehicle track is provided on the fixed pad; the fixed pad is detachably connected to the bearing base plate, and the back of the fixed pad is provided with anti-skid grooves that can rub against the engineering vehicle tire.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention replaces the direct lifting of the engineering vehicle in the traditional operation mode with direct lifting of the hanging basket body, so that the hanging basket body and the engineering vehicle can be lifted from the land to the bottom of the cabin as a whole for cabin cleaning operations, without having to consider the unhooking problem after the engineering vehicle is lifted to the bottom of the cabin, thereby avoiding the problem of the hook loosening and accidental unhooking in the process of lifting the engineering vehicle into the air, and the problem of not being able to unhook smoothly and quickly when lifting it to the bottom of the cabin.

[0020] 2. The present invention can pre-adjust the spacing between the long side trusses by rotating the first screw, so that the spacing can be manually adjusted according to the actual width of the engineering vehicle to be hoisted, thereby making the hanging basket body suitable for hoisting operations of specific types of engineering vehicles.

[0021] 3. The present invention provides axially movable stabilizing sleeves on both sides of the hanging basket body, so that after the engineering vehicle enters the hanging basket body, the wheel hub portion can be secured, thereby stabilizing the relative position between the engineering vehicle and the hanging basket body during the lifting process; moreover, the stabilizing sleeve plays a supporting role between the long side truss and the engineering vehicle, preventing the long side truss from deforming during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0023] Figure 1 A three-dimensional structural diagram of a hook-free hanging basket for hoisting an engineering vehicle provided by the present invention;

[0024] Figure 2 for Figure 1 The three-dimensional structure diagram of the main body of the middle hanging basket;

[0025] Figure 3 for Figure 1 Exploded diagram of

[0026] Figure 4 for Figure 3 Enlarged view of middle Ⅰ;

[0027] Figure 5 for Figure 3 Enlarged view of middle Ⅱ;

[0028] Figure 6 for Figure 3 A front view of

[0029] Figure 7 for Figure 3Side view of

[0030] Figure 8 for Figure 3 A schematic diagram of the structure of the fixed pad;

[0031] Fig. 9 for Figure 8 A schematic diagram of the structure on the back of the fixed pad shown;

[0032] Fig.10 A schematic diagram of the structure of an embodiment provided by the present invention;

[0033] Fig.11 for Fig.10 Front view of .

[0034] The numbers in the figure represent the following:

[0035] 10. The main body of the hanging basket; 11. The bearing bottom plate; 12. The first screw; 121. The screw sleeve; 13. The ladder platform; 14. The climbing ramp; 141. The baffle plate 142. The shaft rod 143. The linkage rod 144. The power motor; 15. The load-bearing column; 151. The sliding sleeve; 152. The limiting outer edge; 16. The fixing pad; 161. The convex ridge; 20. The truss; 21. The lifting ear; 22. The short side truss; 221. The cross beam; 222. The vertical beam; 223. The support beam; 23. The long side truss; 24. The stabilizing sleeve; 25. The second screw; 26. The mounting side plate; 261. The driving motor; 262. The auxiliary frame; 30. The lifting structure; 31. The lifting turntable. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1 , 3 As shown, the present invention provides a hook-free hanging basket for hoisting an engineering vehicle, comprising:

[0038] The hanging basket body 10 comprises a load-bearing bottom plate 11 and a truss 20 surrounded by three sides arranged on the load-bearing bottom plate 11, and a lifting ear 21 is arranged on the truss 20, and the lifting ear 21 is fixedly connected to the ship unloader through a lifting structure 30; wherein the truss 20 comprises a short side truss 22 and a long side truss 23, the short side truss 22 stands alone on the short side of the load-bearing bottom plate 11, and the long side truss 23 stands opposite to the long side of the load-bearing bottom plate 11; the long side truss 23 is separated from the load-bearing bottom plate 11 so that the distance between the long side trusses 23 on the opposite side is adjustable; The long side of the base plate 11 is movably connected to the long side truss 23 through the first screw 12, the end of the first screw 12 is axially connected to the supporting base plate 11, the first screw 12 and the cross beam 221 are screwed together by a screw sleeve 121 passing through the first screw 12, and the long side truss 23 can be expanded outward along the width direction of the supporting base plate 11 by rotating the first screw 12; a stabilizing sleeve 24 that can be extended in opposite directions is provided on the truss 20 on the opposite side, and the stabilizing sleeve 24 can be fixed on the wheel hub of the engineering vehicle; a second screw 25 for driving its movement is provided on the outer wall of the closed end of the stabilizing sleeve 24.

[0039] The present invention provides a hook-free hanging basket for lifting construction vehicles, which replaces the direct lifting of the construction vehicle in the traditional operation method with the direct lifting of the hanging basket body 10, so that the hanging basket body 10 and the construction vehicle can be lifted from the land to the bottom of the cabin as a whole for cabin cleaning operations. Since the hanging basket body 10 needs to be immediately lifted back after the construction vehicle is lifted to the cabin in preparation for the lifting of the next construction vehicle, there is no need to automatically unhook the hanging basket body 10. Therefore, when the lifting ears 21 on the hanging basket body 10 are hooked and fixed on the land, further stable fixation can be performed between the lifting structure 30 and the lifting ears 21, without considering the unhooking problem after the construction vehicle is lifted to the bottom of the cabin, thereby avoiding the problem of the hook loosening, accidental unhooking, and the inability to unhook smoothly and quickly when lifting to the bottom of the cabin. Specifically, if Fig.10 , 11 As shown, the hoisting structure 30 in this embodiment includes a hoisting turntable 31, and the hoisting turntable 31 can rotate the hanging basket body 10 around the axis of the hoisting turntable 31 by a corresponding angle under the drive of a motor.

[0040] On the other hand, the present invention can pre-adjust the spacing between the long side trusses 23 by rotating the first screw 12, so that the spacing can be manually adjusted according to the actual width of the hoisted engineering vehicle, so that the hanging basket body 10 can be suitable for the hoisting operation of a specific type of engineering vehicle, and then widely used for the hoisting needs of different types of engineering vehicles. Specifically, when hoisting an engineering vehicle, firstly, on the land surface, the first screw 12 is controlled by a hand wheel to adjust the spacing between the relatively arranged long side trusses 23 to a distance slightly larger than the width of the engineering vehicle, so that the engineering vehicle can smoothly enter the hanging basket body 10.

[0041] On the other hand, the present invention provides axially movable stabilizing sleeves 24 on both sides of the hanging basket body 10, so that after the engineering vehicle enters the hanging basket body 10, the stabilizing sleeves 24 can be actively driven by the second screw 25 to approach the engineering vehicle to secure its wheel hub, thereby stabilizing the relative position between the engineering vehicle and the hanging basket body 10 during the lifting process, avoiding slippage between the two and causing the center of gravity of the engineering vehicle in the hanging basket body 10 to shift, causing a safety accident. Moreover, the stabilizing sleeves 24 play a supporting role between the long side trusses 23 and the engineering vehicle, so that the opposite pulling force applied by the hoisting structure 30 to the long side trusses 23 during the lifting process can be offset, which can not only prevent the deformation of the long side trusses 23 during the lifting process and increase its durability, but also enhance the squeezing force applied by the stabilizing sleeves 24 to the wheel hub of the engineering vehicle, further improving the stability of the engineering vehicle in the hanging basket body 10.

[0042] like Figure 2 As shown, in the above embodiment, the short side trusses 22 and the long side trusses 23 in the truss 20 provided therein both include a horizontal beam 221, a vertical beam 222, and a support beam 223; wherein the horizontal beam 221 is arranged parallel to the side of the supporting base plate 11, the vertical beam 222 is upright on the horizontal beam 221, and the support beam 223 is obliquely arranged between the horizontal beam 221 and the vertical beam 222.

[0043] In the above embodiment, since the engineering vehicles carried on the load-bearing base plate 11 often weigh more than several tons, the load-bearing base plate 11 needs to be made of thicker steel, which hinders the entry of the engineering vehicles and makes it inconvenient to fix the truss 20 on the load-bearing base plate 11.

[0044] To solve the above problems, please continue to refer to Figure 1-3 As shown, in a preferred embodiment provided by the present invention based on the above-mentioned embodiment, the peripheral side of the supporting bottom plate 11 bulges outward to form a step 13 , and the cross beam 221 and the step 13 have the same width.

[0045] More specifically, a wedge-shaped climbing ramp 14 is provided at the end of the bearing bottom plate 11 for guiding the engineering vehicle to enter. The climbing ramp 14 is located on the opposite side of the short side truss 22, and the wedge-shaped surface of the climbing ramp 14 is an outwardly convex curved surface.

[0046] In this embodiment, by designing the structural shape of the bearing bottom plate 11, the steps 13 formed around it can facilitate the fixing of the truss 20 thereon and disperse the force of the truss 20 on the bearing bottom plate 11; the setting of the climbing ramp 14 can guide the entry or exit of the engineering vehicle obliquely to avoid the problem of excessive resistance when the vehicle enters the hanging basket body 10. Specifically, Fig.10 , 11As shown, the climbing ramp 14 in this embodiment includes two rotatable baffles 141, which are hinged to the side of the supporting base plate 11 through an axle rod 142, a linkage rod 143 is provided at one end of the axle rod 142, and a power motor 144 is provided on the vertical beam 222. The output end of the power motor 144 drives the linkage rod 143 to link the axle rod 142, so that the baffles 141 can be folded or dropped within the range of 0° to 90°.

[0047] In the above embodiment, as the long side truss 23 moves outward, the force acting on it is gradually transferred from the supporting base plate 11 to the first screw 12, which may cause the first screw 12 to bend and deform due to the excessive shear force it is subjected to. Since the coaxiality between the first screw 12 and the long side truss 23 changes, the adjustment of the long side truss 23 may be affected.

[0048] In order to solve the above problems, Figure 3-6 As shown, in a preferred embodiment provided by the present invention based on the above embodiments, the long side truss 23 and the load-bearing base plate 11 are slidably connected through the load-bearing column 15, and the load-bearing column 15 and the first screw 12 jointly bear the load of the load-bearing base plate 11; wherein, one end of the load-bearing column 15 is fixed on the load-bearing base plate 11, and the other end of the load-bearing column 15 passes through the long side truss 23 to form a movable connection; a sliding connection is formed between the load-bearing column 15 and the long side truss 23 through a sliding sleeve 151, and the outer edges of both ends of the sliding sleeve 151 protrude and are clamped on both sides of the bottom beam of the long side truss 23; the end of the load-bearing column 15 is provided with a circumferentially protruding limiting outer edge 152.

[0049] In this embodiment, a load-bearing column 15 is provided between the long side truss 23 and the supporting base plate 11 to share the load of the first lead screw 12, thereby preventing the first lead screw 12 from bending and deforming due to excessive shear force after the long side truss 23 moves outward, thereby maintaining the coaxiality between the first lead screw 12 and the long side truss 23.

[0050] The present invention is based on the preferred embodiment provided by the above embodiment. The stabilizing sleeve 24 is arranged as follows: Figure 5-6 As shown, a mounting side plate 26 located between the cross beam 221 and the support beam 223 is provided on the long side truss 23, and the second lead screw 25 is axially supported on the mounting side plate 26; wherein, a driving motor 261 is provided on one side of the mounting side plate 26 for driving the second lead screw 25, and a stabilizing sleeve 24 is provided on the other side of the mounting side plate 26 to be fixedly connected to the second lead screw 25; the driving motor 261 and the cross beam 221 are fixedly connected via an auxiliary frame 262.

[0051] In this embodiment, the second screw 25 is driven by the driving motor 261 to drive the stabilizing sleeve 24 to move in opposite directions, so as to secure the wheel hub of the engineering vehicle during the lifting process. When the hanging basket body 10 is lifted to the bottom of the cabin, the second screw 25 is retracted by controlling the driving motor 261 to allow the stabilizing sleeve 24 to release its limiting effect on the engineering vehicle, so that the engineering vehicle can drive out of the hanging basket body 10 and enter the bottom of the cabin to perform cabin cleaning operations.

[0052] In order to improve the stabilizing effect of the stabilizing sleeve 24 on the wheel hub of the engineering vehicle, please continue to refer to Figure 1 As shown, two stabilizing sleeves 24 are symmetrically provided on the long side trusses 23 on either side.

[0053] In order to improve the stability of the hanging basket body 10 during hoisting, please continue to refer to Figure 1 As shown, two lifting ears 21 are symmetrically provided on the long side trusses 23 on either side.

[0054] In the above embodiment, although the stabilizing sleeve 24 can fix the engineering vehicle to a certain extent, the engineering vehicle may slip relative to the load-bearing base plate 11 .

[0055] In order to solve the above problems, Figure 1 , 8 As shown in Figures 9, in a preferred embodiment provided by the present invention based on the above embodiments, a fixed pad 16 is provided on the bearing base plate 11, and a ridge 161 which can be engaged with the track of the engineering vehicle is provided on the fixed pad 16; the fixed pad 16 is detachably connected to the bearing base plate 11, and an anti-skid pattern 162 which can rub against the tire of the engineering vehicle is provided on the back side of the fixed pad 16.

[0056] In this embodiment, the fixing pad 16 is provided to prevent slipping, and one side of the fixing pad 16 can prevent slipping for the engineering vehicle driven by the track wheel through the ridge 161, and the other side can prevent slipping for the engineering vehicle driven by the rubber tire through the anti-skid pattern 162. It should be noted that the fixing pad 16 is detachably connected to the bearing bottom plate 11, such as bolt connection, clamp connection, etc.

[0057] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A hook-free hanging basket for hoisting engineering vehicles, characterized in that: include: A hanging basket body (10) comprises a bearing bottom plate (11) and a truss (20) arranged on the bearing bottom plate (11) and enclosing three sides thereof, wherein the truss (20) is provided with a lifting lug (21), and the lifting lug (21) is fixedly connected to the ship unloader via a lifting structure (30); The truss (20) comprises a short side truss (22) and a long side truss (23), wherein the short side truss (22) stands alone on the short side of the bearing bottom plate (11), and the long side truss (23) stands opposite to the long side of the bearing bottom plate (11); The long side trusses (23) are arranged separately from the bearing bottom plate (11) so that the spacing between the long side trusses (23) located on the opposite sides is adjustable; the long side of the bearing bottom plate (11) is movably connected to the long side trusses (23) via a first lead screw (12); the end of the first lead screw (12) and the bearing bottom plate (11) are axially connected, and the long side trusses (23) are expanded outward along the width direction of the bearing bottom plate (11) by rotating the first lead screw (12); The truss (20) located on the opposite side is provided with a stabilizing sleeve (24) that can be extended in opposite directions, and the stabilizing sleeve (24) can be fixed on the wheel hub of the engineering vehicle; the outer wall of the closed end of the stabilizing sleeve (24) is provided with a second screw (25) for driving its movement.

2. The hook-free hanging basket for hoisting engineering vehicles according to claim 1 is characterized in that: The short side trusses (22) and the long side trusses (23) both comprise a cross beam (221), a vertical beam (222), and a support beam (223); The cross beam (221) is arranged parallel to the side of the bearing bottom plate (11), the vertical beam (222) stands upright on the cross beam (221), and the support beam (223) is arranged obliquely between the cross beam (221) and the vertical beam (222).

3. The hook-free hanging basket for hoisting engineering vehicles according to claim 2 is characterized in that: The peripheral side of the bearing bottom plate (11) is convex to form a step platform (13), and the cross beam (221) and the step platform (13) are of equal width.

4. The hook-free hanging basket for hoisting engineering vehicles according to claim 3 is characterized in that: A wedge-shaped climbing ramp (14) is provided at the end of the bearing bottom plate (11) for guiding the engineering vehicle to enter, and the climbing ramp (14) is located on the opposite side of the short side truss (22), and the wedge-shaped surface of the climbing ramp (14) is an outwardly convex curved surface.

5. The hook-free hanging basket for hoisting engineering vehicles according to claim 4 is characterized in that: The long side truss (23) and the bearing bottom plate (11) are slidably connected via a load-bearing column (15), and the load-bearing column (15) and the first lead screw (12) jointly bear the load of the bearing bottom plate (11); One end of the load-bearing column (15) is fixed on the bearing base plate (11), and the other end of the load-bearing column (15) passes through the long side truss (23) to form a movable connection; The load-bearing column (15) and the long side truss (23) are slidably connected via a sliding sleeve (151), and the outer edges of both ends of the sliding sleeve (151) are protruding and clamped on both sides of the bottom crossbeam (221) of the long side truss (23); The end of the load-bearing column (15) is provided with a circumferentially outwardly protruding limiting outer edge (152).

6. The hook-free hanging basket for hoisting engineering vehicles according to claim 5, characterized in that: The long side truss (23) is provided with a mounting side plate (26) located between the cross beam (221) and the support beam (223), and the second lead screw (25) is axially supported on the mounting side plate (26); Wherein, a driving motor (261) is provided on one side of the mounting side plate (26) for driving the second lead screw (25), and the stabilizing sleeve (24) is provided on the other side of the mounting side plate (26) for fixed connection with the second lead screw (25); The driving motor (261) and the crossbeam (221) are fixedly connected via an auxiliary frame (262).

7. The hook-free hanging basket for hoisting engineering vehicles according to claim 6, characterized in that: Two stabilizing sleeves (24) are symmetrically provided on the long side trusses (23) on either side.

8. The hook-free hanging basket for hoisting engineering vehicles according to claim 7, characterized in that: Two of the lifting ears (21) are symmetrically arranged on the long side truss (23) on either side.

9. The hook-free hanging basket for hoisting engineering vehicles according to claim 8, characterized in that: The first lead screw (12) and the cross beam (221) are screwed together via a screw sleeve (121) that passes through them.

10. A hook-free hanging basket for hoisting engineering vehicles according to any one of claims 1 to 9, characterized in that: The bearing bottom plate (11) is provided with a fixed pad (16), and the fixed pad (16) is provided with a convex ridge (161) that can be locked with the track of the engineering vehicle; the fixed pad (16) is detachably connected to the bearing bottom plate (11), and the back of the fixed pad (16) is provided with an anti-skid pattern (162) that can rub against the tire of the engineering vehicle.

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