A municipal water supply and sewerage pipeline suspension lifting and carrying device

Abstract

The application relates to the technical field of pipeline carrying, in particular to a municipal water supply and drainage pipeline suspension lifting carrying device, which comprises a moving frame, a base, universal wheels, a clamping assembly, a supporting assembly and a first driving assembly. The municipal water supply and drainage pipeline suspension lifting carrying device can closely adhere to the outer wall of the pipeline through the symmetrically arranged arc-shaped plates, the stability of the arc-shaped plates during clamping is ensured through the sliding cooperation of the side supporting shafts and the limiting holes, the reverse elastic force of the reset springs between the end blocks and the side frames is generated when the arc-shaped plates are subjected to the reaction force of the pipeline, the clamping force of the arc-shaped plates on the pipeline is further enhanced, the arc-shaped plates are tightly adhered to the side surface of the pipeline, clamping loosening is avoided, meanwhile, the abutting plates on the two sides of the arc-shaped plates can synchronously rotate reversely and abut at the top end and the bottom end of the pipeline respectively, a three-dimensional clamping structure is formed with the arc-shaped plates, the pipeline surface is wrapped in all directions, and the displacement of the pipeline in the up-down and left-right directions is effectively limited.

Description

Technical Field

[0001] This invention relates to the field of pipeline handling technology, specifically to a suspended lifting and handling device for municipal water supply and drainage pipelines. Background Technology

[0002] During the excavation of deep trenches in the open-cut section, hoisting equipment is required to lift the pipeline. The current common hoisting method is to wrap a steel wire rope around the end of the pipeline, hook the steel wire rope onto the hook of the hoisting equipment, and then start the hoisting equipment to lift the entire pipeline.

[0003] The existing equipment has the following drawbacks: When hoisting components, the existing hoisting equipment can only be roughly positioned by the workers, then the pipe is clamped and fixed, and then the pipe is lifted and moved by the crane. Since the hoisting equipment is not fixed at the center of gravity of the pipe, the pipe will tilt when the crane lifts it. When moving it by the crane, it will tilt and swing. The pipe is unstable during transportation and there are certain safety hazards. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a suspension lifting and transport device for municipal water supply and drainage pipelines to solve the above problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A suspended lifting and transporting device for municipal water supply and drainage pipelines includes a mobile frame, a base, and casters. The base is installed at the bottom of the mobile frame, and the casters are installed at the bottom of the base. The mobile frame is equipped with a clamping mechanism, which includes a clamping component, a support component, and a first driving component. The first driving component drives the clamping component and the support component to clamp and limit the pipe to maintain the stability of the pipe.

[0006] Preferably, the clamping assembly includes symmetrically arranged arc-shaped plates. The two arc-shaped plates can move closer to each other and further apart to clamp and limit the pipe. Two side support shafts are symmetrically fixed on the outer arc surface of the arc-shaped plates. A side frame is provided on one side of the side support shaft. The side frame has a limiting hole adapted to the side support shaft. The limiting hole is coaxial with the corresponding side support shaft. The side support shaft is slidably connected inside the corresponding limiting hole. The side support shaft is used to support the arc-shaped plates to maintain their stability.

[0007] Preferably, an end block is fixed on the side of the side support shaft away from the arc plate, and a return spring is fixed between one side of the end block and the side frame to support the end block, which can improve the clamping strength of the arc plate on the pipe.

[0008] Preferably, the support assembly includes abutment plates symmetrically arranged on both sides of the arc-shaped plate, with the abutment plates coaxially arranged with the arc-shaped plate and the inner surface of the abutment plates being on the same horizontal plane as the inner surface of the arc-shaped plate. A first connecting block is fixed to one side of the abutment plate, and an arc-shaped groove adapted to the first connecting block is opened on the side of the arc-shaped plate facing the first connecting block. The first connecting block is slidably connected inside the corresponding arc-shaped groove. When the abutment plate rotates along its axial direction, the first connecting block can slide along the extension trajectory of the arc-shaped groove, thereby limiting the abutment plate. A support plate is fixed to the outer arc surface of the abutment plate, and the support plate can drive the abutment plate to rotate around its axial direction, thereby supporting the bottom and top of the pipe.

[0009] Preferably, the first driving component includes a rack fixed on one side wall of the support plate, and a toothed ring is provided between two adjacent racks. The toothed ring is engaged with the rack. When the toothed ring rotates around its axial direction, the toothed ring can drive the abutment plate to rotate on the arc plate through the engagement with the rack, thereby driving the abutment plate to clamp the top and bottom of the pipe.

[0010] Preferably, the inner wall of the toothed ring is fixed with a linkage shaft, and the linkage shaft is coaxially arranged with the toothed ring. A sleeve is provided on the outside of the linkage shaft, and the sleeve is coaxially arranged with the linkage shaft. The outer wall of the linkage shaft abuts against the inner wall of the sleeve. When the linkage shaft slides along the axial direction of the sleeve, the linkage shaft can drive the toothed ring to rotate around its axial direction. The toothed ring drives the connected abutment plate to slide on the arc plate through the rack.

[0011] Preferably, a linkage block is fixed to the outer wall of the linkage shaft, and a linkage groove adapted to the linkage block is opened on the inner wall of the sleeve. The linkage block is slidably connected inside the corresponding linkage groove. When the linkage block slides along the extension trajectory of the linkage groove, the linkage shaft can rotate around its axis, thereby driving the abutment plate to rotate on the arc plate.

[0012] Preferably, the side frame has a receiving hole adapted to the sleeve, and the receiving hole is coaxially arranged with the sleeve. The outer wall of the sleeve is fixed to the inner wall of the receiving hole. The receiving hole is used to limit the sleeve to maintain the stability of the sleeve. A side plate is fixed on the side of the arc plate facing the linkage shaft, and the end of the linkage shaft away from the sleeve is rotatably connected to the side wall of the side plate to support the linkage shaft and maintain the stability of the linkage shaft.

[0013] Preferably, the movable frame is provided with a second drive assembly for controlling the sliding state of the arc plate to clamp and limit or release the pipe. The second drive assembly includes a top shaft fixed to the top of the side frame, a second connecting block fixed to the top of the top shaft, and a drive shaft between the two second connecting blocks.

[0014] Preferably, a first connecting frame is provided on the outside of the drive shaft, and both ends of the drive shaft are rotatably connected to the inner wall of the first connecting frame. The first connecting frame is used to support the drive shaft to maintain its stability. A drive source is installed on one side of the first connecting frame, and the output end of the drive source is fixed to one end of the drive shaft. A hydraulic cylinder is installed on the top of the moving frame, and the piston rod end of the hydraulic cylinder is connected to the top of the first connecting frame.

[0015] The beneficial effects of this invention are as follows: 1. Through the coordinated action of the clamping mechanism, the pipe is clamped and limited in all directions with high strength, avoiding the problems of weak clamping and easy slippage of traditional handling devices. On the one hand, the symmetrically arranged arc-shaped plates can fit tightly against the outer wall of the pipe, and the sliding cooperation between the side support shaft and the limiting hole ensures the stability of the arc-shaped plates during clamping. On the other hand, the return spring between the end block and the side frame will generate a reverse elastic force when the arc-shaped plate is subjected to the reaction force of the pipe, further enhancing the clamping force of the arc-shaped plate on the pipe, so that the arc-shaped plate fits tightly against the side of the pipe and avoids loosening of the clamp. At the same time, the abutment plates on both sides of the arc-shaped plate can rotate in opposite directions synchronously and abut against the top and bottom of the pipe respectively, forming a three-dimensional clamping structure with the arc-shaped plate, which fully wraps the surface of the pipe, effectively restricting the displacement of the pipe in the vertical and horizontal directions, eliminating the safety hazards such as pipe falling off or shifting during handling, and ensuring operational safety.

[0016] 2. Through the sliding engagement of the first connecting block and the arc-shaped groove, it can rotate around the pipe axis to adjust the contact angle, ensuring that the contact plate is tightly fitted with the top and bottom ends of the pipe. The side support shaft is slidably connected in the limiting hole of the side frame, providing support and limiting for the arc-shaped plate and preventing it from shifting when clamped. The linkage shaft slides through the linkage block and the linkage groove on the inner wall of the sleeve, realizing both axial sliding of the linkage shaft and driving the linkage shaft to rotate, ensuring the stable transmission of the first drive assembly. The rotational connection between the side plate and the linkage shaft further improves the support stability of the linkage shaft and avoids shaking when the linkage shaft rotates. The limiting of the support of the drive shaft by the first connecting frame ensures the smoothness of the drive shaft rotation and ensures that the second drive assembly can drive the arc-shaped plate to move.

[0017] 3. The two second connecting blocks move closer or further apart via threaded transmission, thereby driving the arc plate to clamp or release the pipe. The first drive assembly, through the cooperation of the linkage shaft, gear ring, and rack, can automatically drive the abutment plate to rotate in the opposite direction, completing the all-round clamping of the pipe. The entire operation is convenient and efficient, requiring no multiple people to work together. A single person can operate and control the device. At the same time, the hydraulic cylinder can drive the first connecting frame to lift and suspend the pipe, avoiding the laborious operation of manually lifting the pipe and further improving the efficiency of handling operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the second driving component of the present invention; Figure 3 This is a schematic diagram of the clamping mechanism of the present invention; Figure 4 This is a schematic diagram of the clamping assembly of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the structure of the first driving component of the present invention.

[0019] In the picture: 10. Movable frame; 11. Base; 12. Casters; 20. Clamping mechanism; 21. Clamping assembly; 2101. Arc plate; 2102. Side support shaft; 2103. Side frame; 2104. Limiting hole; 2105. End block; 2106. Return spring; 22. Support component; 2201. Abutment plate; 2202. First connecting block; 2203. Arc groove; 2204. Support plate; 23. First drive assembly; 2301. Rack; 2302. Gear ring; 2303. Linkage shaft; 2304. Sleeve; 2305. Linkage block; 2306. Linkage groove; 2307. Receiving hole; 2308. Side plate; 30. Second drive assembly; 31. Top shaft; 32. Second connecting block; 33. Drive shaft; 34. First connecting frame; 35. Drive source; 36. Hydraulic cylinder. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] Reference Appendix Figures 1-6 As shown, a suspended lifting and transporting device for municipal water supply and drainage pipelines includes a mobile frame 10, which is U-shaped. Two bases 11 are symmetrically installed at the bottom of the mobile frame 10, and casters 12 are installed at the bottom of both bases 11 to facilitate the movement of the mobile frame 10.

[0022] The movable frame 10 is equipped with a clamping mechanism 20 for clamping the pipe, thereby facilitating the transfer of the pipe.

[0023] The clamping mechanism 20 includes a clamping component 21, a support component 22, and a first driving component 23. The first driving component 23 drives the clamping component 21 and the support component 22 to clamp and limit the pipe to maintain the stability of the pipe.

[0024] The clamping assembly 21 includes symmetrically arranged arc-shaped plates 2101. The two arc-shaped plates 2101 can move closer to each other and further apart, thereby clamping and limiting the pipe and releasing the limit. Two side support shafts 2102 are symmetrically fixed on the outer arc surface of the arc-shaped plates 2101. A side frame 2103 is provided on one side of the side support shaft 2102. The side frame 2103 is provided with a limiting hole 2104 that is adapted to the side support shaft 2102. The limiting hole 2104 is coaxially arranged with the corresponding side support shaft 2102. The side support shaft 2102 is slidably connected inside the corresponding limiting hole 2104. The side support shaft 2102 is used to support the arc-shaped plates 2101 to maintain the stability of the arc-shaped plates 2101.

[0025] An end block 2105 is fixed on the side of the side support shaft 2102 away from the arc plate 2101. A return spring 2106 is fixed between one side of the end block 2105 and the side frame 2103 to support the end block 2105 and improve the clamping strength of the arc plate 2101 on the pipe.

[0026] The support assembly 22 includes abutment plates 2201 symmetrically arranged on both sides of the arc-shaped plate 2101. The abutment plates 2201 are coaxially arranged with the arc-shaped plate 2101, and the inner surface of the abutment plates 2201 is at the same horizontal plane as the inner surface of the arc-shaped plate 2101. A first connecting block 2202 is fixed on one side of the abutment plate 2201. An arc-shaped groove 2203 adapted to the first connecting block 2202 is opened on the side of the arc-shaped plate 2101 facing the first connecting block 2202. The first connecting block 2202 is slidably connected inside the corresponding arc-shaped groove 2203. When the abutment plate 2201 rotates along its axial direction, the first connecting block 2202 can slide along the extension trajectory of the arc-shaped groove 2203, thereby limiting the position of the abutment plate 2201.

[0027] It should be noted that when the abutment plates 2201 on both sides of the arc plate 2101 rotate, they will rotate to opposite directions. That is, one of the support plates 2204 on both sides of the abutment plate 2201 rotates to the bottom of the arc plate 2101, and the other support plate 2204 rotates to the top of the arc plate 2101, thus abutting against the top and bottom of the pipe. The arc plate 2101, together with the abutment plates 2201, clamps and limits the surface of the pipe in all directions.

[0028] A support plate 2204 is fixed to the outer arc surface of the abutment plate 2201. The support plate 2204 can drive the abutment plate 2201 to rotate around its axis, thereby supporting the bottom and top of the pipe.

[0029] The first drive assembly 23 includes a rack 2301 fixed on one side wall of the support plate 2204. A toothed ring 2302 is provided between two adjacent racks 2301, and the toothed ring 2302 is meshed with the rack 2301. When the toothed ring 2302 rotates around its axial direction, the toothed ring 2302 can drive the abutment plate 2201 to rotate on the arc plate 2101 through the meshing connection with the rack 2301, thereby driving the abutment plate 2201 to clamp the top and bottom of the pipe.

[0030] A linkage shaft 2303 is fixed to the inner wall of the gear ring 2302, and the linkage shaft 2303 is coaxially arranged with the gear ring 2302. A sleeve 2304 is provided on the outside of the linkage shaft 2303, and the sleeve 2304 is coaxially arranged with the linkage shaft 2303. The outer wall of the linkage shaft 2303 abuts against the inner wall of the sleeve 2304. When the linkage shaft 2303 slides along the axial direction of the sleeve 2304, the linkage shaft 2303 can drive the gear ring 2302 to rotate around its axial direction. The gear ring 2302 drives the connected abutment plate 2201 to slide on the arc plate 2101 through the rack 2301.

[0031] A linkage block 2305 is fixed on the outer wall of the linkage shaft 2303. The inner wall of the sleeve 2304 is provided with a linkage groove 2306 that matches the linkage block 2305. The linkage block 2305 is slidably connected inside the corresponding linkage groove 2306. When the linkage block 2305 slides along the extension trajectory of the linkage groove 2306, the linkage shaft 2303 can rotate around its axis, thereby driving the abutment plate 2201 to rotate on the arc plate 2101.

[0032] It should be noted that the linkage groove 2306 is composed of a spiral groove and a straight groove. The first end of the spiral groove is close to the arc plate 2101, and the last end of the spiral groove is far away from the arc plate 2101. The last end of the spiral groove is connected to the first end of the straight groove. When the linkage block 2305 slides inside the linkage groove 2306, it will slide from the first end of the spiral groove to its last end. At this time, the linkage shaft 2303 rotates around its axis inside the sleeve 2304, thereby driving the abutment plate 2201 to rotate on the arc plate 2101.

[0033] The side frame 2103 has a receiving hole 2307 that is compatible with the sleeve 2304. The receiving hole 2307 and the sleeve 2304 are coaxially arranged, and the outer wall of the sleeve 2304 is fixed on the inner wall of the receiving hole 2307. The receiving hole 2307 is used to limit the sleeve 2304 to maintain the stability of the sleeve 2304.

[0034] A side plate 2308 is fixed on the side of the arc plate 2101 facing the linkage shaft 2303, and the end of the linkage shaft 2303 away from the sleeve 2304 is rotatably connected to one side wall of the side plate 2308 to support the linkage shaft 2303 and maintain its stability.

[0035] The movable frame 10 is equipped with a second drive assembly 30, which is used to control the sliding state of the arc plate 2101 to clamp and limit or release the limit on the pipe.

[0036] The second drive assembly 30 includes a top shaft 31 fixed to the top of the side frame 2103, a second connecting block 32 fixed to the top of the top shaft 31, and a drive shaft 33 disposed between the two second connecting blocks 32.

[0037] It should be noted that both ends of the drive shaft 33 have threaded sections, and the second connecting block 32 has a threaded groove that matches the threaded section. The second connecting block 32 is threadedly connected to the threaded section of the drive shaft 33 through the threaded groove. When the drive shaft 33 rotates around its axial direction, the two second connecting blocks 32 slide on the drive shaft 33, thereby causing the two second connecting blocks 32 to move closer to each other or further away from each other.

[0038] A first connecting frame 34 is provided on the outside of the drive shaft 33, and both ends of the drive shaft 33 are rotatably connected to the inner wall of the first connecting frame 34. The first connecting frame 34 is used to support the drive shaft 33 to maintain its stability. A drive source 35 is installed on one side of the first connecting frame 34, and the output end of the drive source 35 is fixed to one end of the drive shaft 33. A hydraulic cylinder 36 is installed on the top of the moving frame 10, and the piston rod end of the hydraulic cylinder 36 is connected to the top of the first connecting frame 34.

[0039] In use, the movable frame 10 is moved to the pipe until the pipe is positioned between the two arc-shaped plates 2101. The output end of the drive source 35 drives the drive shaft 33 to rotate, causing the two second connecting blocks 32 to move closer to each other. The two arc-shaped plates 2101 also slide towards the pipe and clamp onto its surface. With the reaction force applied by the pipe, the arc-shaped plates 2101 drive the side support shaft 2102 to slide inside the limiting hole 2104, while the end block 2105 pulls the return spring 2106. Due to the characteristics of the return spring 2106, the arc-shaped plates 2101 are tightly clamped to the side of the pipe, and the arc... The shaped plate 2101 drives the linkage shaft 2303 to slide inside the sleeve 2304, and the linkage block 2305 slides along the extension trajectory of the linkage groove 2306. At this time, the linkage shaft 2303 rotates, and the gear ring 2302, in conjunction with the rack 2301, drives the abutment plate 2201 to rotate around its axis. The first connecting block 2202 slides along the extension trajectory of the arc groove 2203. Then, the abutment plates 2201 on both sides of the arc plate 2101 rotate synchronously in opposite directions and abut against the top and bottom of the pipe respectively, thereby clamping and limiting the side wall of the pipe in all directions.

[0040] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A suspension lifting and transport device for municipal water supply and drainage pipelines, characterized in that: It includes a movable frame (10), a base (11) and casters (12). The base (11) is installed at the bottom of the movable frame (10), and the casters (12) are installed at the bottom of the base (11). The movable frame (10) is provided with a clamping mechanism (20), which includes a clamping component (21), a support component (22) and a first drive component (23). The first drive component (23) drives the clamping component (21) and the support component (22) to clamp and limit the pipe to maintain the stability of the pipe. The clamping assembly (21) includes symmetrically arranged arc-shaped plates (2101). The two arc-shaped plates (2101) can move closer to each other and further away from each other, thereby clamping and limiting the pipe and releasing the limit. The outer arc surface of the arc-shaped plate (2101) is symmetrically fixed with two side support shafts (2102). A side frame (2103) is provided on one side of the side support shaft (2102). The side frame (2103) is provided with a limiting hole (2104) that is adapted to the side support shaft (2102). The limiting hole (2104) is coaxially arranged with the corresponding side support shaft (2102). The side support shaft (2102) is slidably connected inside the corresponding limiting hole (2104). The side support shaft (2102) is used to support the arc-shaped plate (2101) to maintain the stability of the arc-shaped plate (2101). An end block (2105) is fixed on the side of the side support shaft (2102) away from the arc plate (2101). A return spring (2106) is fixed between one side of the end block (2105) and the side frame (2103) to support the end block (2105) and improve the clamping strength of the arc plate (2101) on the pipe. The support assembly (22) includes abutment plates (2201) symmetrically arranged on both sides of the arc-shaped plate (2101), and the abutment plates (2201) are coaxially arranged with the arc-shaped plate (2101). The inner surface of the abutment plates (2201) and the inner surface of the arc-shaped plate (2101) are on the same horizontal plane. A first connecting block (2202) is fixed on one side of the abutment plates (2201). An arc-shaped groove (2203) adapted to the first connecting block (2202) is opened on the side of the arc-shaped plate (2101) facing the first connecting block (2202). The first connecting block (2202) is slidably connected inside the corresponding arc groove (2203). When the abutment plate (2201) rotates along its axial direction, the first connecting block (2202) can slide along the extension trajectory of the arc groove (2203) to limit the abutment plate (2201). The outer arc surface of the abutment plate (2201) is fixed with a support plate (2204). The support plate (2204) can drive the abutment plate (2201) to rotate around its axial direction to support the bottom and top of the pipe. The first drive assembly (23) includes a rack (2301) fixed on one side wall of the support plate (2204). A toothed ring (2302) is provided between two adjacent racks (2301), and the toothed ring (2302) is meshed with the rack (2301). When the toothed ring (2302) rotates around its axial direction, the toothed ring (2302) can drive the abutment plate (2201) to rotate on the arc plate (2101) through the meshing connection with the rack (2301), thereby driving the abutment plate (2201) to clamp the top and bottom of the pipe. The inner wall of the toothed ring (2302) is fixed with a linkage shaft (2303), and the linkage shaft (2303) is coaxially arranged with the toothed ring (2302). A sleeve (2304) is provided on the outside of the linkage shaft (2303), and the sleeve (2304) is coaxially arranged with the linkage shaft (2303). The outer wall of the linkage shaft (2303) abuts against the inner wall of the sleeve (2304). When the linkage shaft (2303) slides along the axial direction of the sleeve (2304), the linkage shaft (2303) can drive the toothed ring (2302) to rotate around its axial direction. The toothed ring (2302) drives the connected abutment plate (2201) to slide on the arc plate (2101) through the rack (2301). The outer wall of the linkage shaft (2303) is fixed with a linkage block (2305), and the inner wall of the sleeve (2304) is provided with a linkage groove (2306) that matches the linkage block (2305). The linkage block (2305) is slidably connected inside the corresponding linkage groove (2306). When the linkage block (2305) slides along the extension trajectory of the linkage groove (2306), the linkage shaft (2303) can rotate around its axis, thereby driving the abutment plate (2201) to rotate on the arc plate (2101).

2. The suspension lifting and transport device for municipal water supply and drainage pipelines according to claim 1, characterized in that, The side frame (2103) is provided with a receiving hole (2307) that is compatible with the sleeve (2304), and the receiving hole (2307) and the sleeve (2304) are coaxially arranged. The outer wall of the sleeve (2304) is fixed on the inner wall of the receiving hole (2307). The receiving hole (2307) is used to limit the sleeve (2304) to maintain the stability of the sleeve (2304). The arc plate (2101) is fixed with a side plate (2308) on the side facing the linkage shaft (2303), and the end of the linkage shaft (2303) away from the sleeve (2304) is rotatably connected to the side wall of the side plate (2308) to support the linkage shaft (2303) to maintain the stability of the linkage shaft (2303).

3. The suspension lifting and transport device for municipal water supply and drainage pipelines according to claim 2, characterized in that, The movable frame (10) is provided with a second drive assembly (30) for controlling the sliding state of the arc plate (2101) to clamp or release the pipe. The second drive assembly (30) includes a top shaft (31) fixed to the top of the side frame (2103), a second connecting block (32) fixed to the top of the top shaft (31), and a drive shaft (33) between the two second connecting blocks (32).

4. The suspension lifting and transport device for municipal water supply and drainage pipelines according to claim 3, characterized in that, The drive shaft (33) is provided with a first connecting frame (34) on its outside, and both ends of the drive shaft (33) are rotatably connected to the inner wall of the first connecting frame (34). The first connecting frame (34) is used to support the drive shaft (33) to maintain the stability of the drive shaft (33). A drive source (35) is installed on one side of the first connecting frame (34), and the output end of the drive source (35) is fixed to one end of the drive shaft (33). A hydraulic cylinder (36) is installed on the top of the moving frame (10), and the piston rod end of the hydraulic cylinder (36) is connected to the top of the first connecting frame (34).

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