Fixing support for maintenance of speed reducer of scraper conveyor

Abstract

The invention belongs to the technical field of scraper conveyor speed reducer auxiliary maintenance fixing devices, and particularly discloses a scraper conveyor speed reducer maintenance fixing support which comprises a device body. A jack is arranged at the rear end of the device body, and an assembly type dismantling mechanism is arranged between the device body and the jack. Through the design of the assembly type dismounting mechanism, the function of assembling the jack so as to provide an acting point is achieved, and the problems that an existing device is not provided with an assembly capable of transversely supporting and fixing the jack, when a coupling wheel needs to be transversely dismounted, the jack needs to be transversely placed in the air, and the assembly is inconvenient are solved. The problem that the jack is in a suspended state and cannot provide an effective acting point due to the fact that the jack needs to be jacked on the shaft through a jacking disc of the jack and the acting force direction of the jack and the central axis of the coupling are on the same straight line, namely the acting force direction is also transverse, is solved, and convenience is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary maintenance and fixing devices for scraper conveyor reducers, and specifically relates to a maintenance and fixing bracket for scraper conveyor reducers. Background Technology

[0002] The auxiliary maintenance and fixing device for scraper conveyor reducers is mainly used to disassemble the reducer's coupling wheel. The reducer weighs about 7 tons, so the reducer's coupling wheel also weighs nearly 1 ton. This disassembly of the reducer's coupling wheel requires the cooperation of multiple people and the use of jacks.

[0003] A specific example of a repair and fixing bracket for a scraper conveyor reducer can be found in the hand-cranked jack with application number CN202423249972.2. This jack includes an adjusting component, an inner support component, and a hollow outer support component for lifting objects. The outer support component is fitted onto the inner support component and contacts its outer surface. The adjusting component drives the outer support component to slide up and down. When the outer support component slides up and down, both the inner and outer walls of the inner support component provide guidance and support to the outer support component. The adjusting component includes a first bevel gear disposed within the outer support component, a second bevel gear meshing with the first bevel gear, and a screw rotatably connected to the outer support component. The upper end of the screw is fixedly connected to the second bevel gear, and the lower end of the screw extends into the inner support component and is threadedly connected to it. Rotation of the first bevel gear drives the second bevel gear to rotate circumferentially in a horizontal plane, which in turn drives the screw to rotate circumferentially in a horizontal plane. This invention increases the contact surface and improves the stability of the jack during lifting. The aforementioned device does not include a component for lateral support and fixation of the jack. When the coupling needs to be disassembled laterally, the jack also needs to be placed horizontally in the air. The jack's top plate needs to be placed on the shaft so that the direction of the jack's force is in the same straight line as the central axis of the coupling, i.e., the direction of the force is also lateral. However, the jack is in a suspended state at this time and cannot provide an effective point of force. Therefore, a scraper conveyor reducer maintenance fixing bracket is proposed to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a maintenance and fixing bracket for a scraper conveyor reducer.

[0005] To achieve the above objectives, the present invention provides a maintenance and fixing bracket for a scraper conveyor reducer, comprising a main body; a jack is provided at the rear end of the main body, and an assembly-type dismantling mechanism is provided between the main body and the jack; The assembled dismantling mechanism includes a fixed sleeve, which is located at the middle of the rear end of the main body of the device, and the front end of the fixed sleeve is fixedly connected to the rear end of the main body of the device. A pressing plate is provided above the fixed sleeve, and first fixed seats are also provided on the left and right sides of the bottom end of the pressing plate. The bottom end of the pressing plate is fixedly connected to the top end of the first fixed seat. The top end of the first rotating head is sleeved on the outer side of the bottom end of the first fixed seat, and the first rotating head is rotatably connected to the first fixed seat. The bottom end of the first rotating head is fixedly connected to the top end of the rotating rod.

[0006] In the above technical solution, the bottom end of the rotating rod is fixedly connected to the top end of the second rotating head, the bottom end of the second rotating head is sleeved on the outside of the second fixed seat, and the second rotating head is rotatably connected to the second fixed seat. The bottom end of the second fixed seat is fixedly connected to the top end of the fixed support frame, and the bottom end of the fixed support frame is fixedly connected to the top end of the first fixed block.

[0007] In the above technical solution, the first fixed block side end is fixedly connected to one end of the moving rod, the other end of the moving rod passes through the side end of the fixed sleeve to reach the inside of the fixed sleeve and is fixedly connected to one side of the limiting plate, and the moving rod is slidably connected to the fixed sleeve.

[0008] In the above technical solution, a return spring is further provided on the outer side of the moving rod. One end of the return spring is fixedly connected to the outer side of the fixed sleeve, and the other end of the return spring is fixedly connected to the first fixed block.

[0009] In the above technical solution, the front end of the first fixing block is fixedly connected to the rear end of the second fixing block, the second fixing block is sleeved on the outside of the first guide rod, and the second fixing block is slidably connected to the first guide rod. One end of the first guide rod is fixedly connected to the fixing sleeve, and the other end of the first guide rod is fixedly connected to the first limiting block.

[0010] In the above technical solution, the rear end of the fixed sleeve is fixedly connected to the front end of the fixed platform, the top end of the fixed platform is fixedly connected to the bottom end of the second guide rod, the top end of the second guide rod is fixedly connected to the bottom end of the second limiting block, a pressing plate is sleeved on the outside of the second guide rod, and the pressing plate is slidably connected to the second guide rod.

[0011] In the above technical solution, the front end of the jack is inserted inside the fixed sleeve, and the jack is slidably connected to the fixed sleeve. The other side of the limiting plate is fixedly connected to one side of the protective pad, and the other side of the protective pad abuts against the side end of the jack.

[0012] In the above technical solution, the bottom end of the jack is fixedly connected to one end of the positioning rod, the other end of the positioning rod is inserted into the third fixing block, and the positioning rod is slidably connected to the third fixing block. The top end of the third fixing block is fixedly connected to the bottom end of the fixing sleeve.

[0013] In the above technical solution, further, the left and right sides of the rear end of the device body are also fixedly connected to guide rails, a movable slider is sleeved on the outer side of the guide rail, and the movable slider is slidably connected to the guide rail. The rear end of the movable slider is fixedly connected to the front end of the fixed rod, and the rear end of the fixed rod is fixedly connected to the front end of the locking block.

[0014] In the above technical solution, the rear end of the movable slider is fixedly connected to the front end of the first fixed plate, the side end of the first fixed plate is fixedly connected to the fixed sleeve block, the fixed sleeve block is sleeved on the outside of the third rotating head, and the fixed sleeve block is rotatably connected to the third rotating head, the side end of the third rotating head is fixedly connected to one end of the hand-rotated threaded rod, the outside of the hand-rotated threaded rod is sleeved with a second fixed plate, and the hand-rotated threaded rod is threadedly connected to the second fixed plate, the front end of the second fixed plate is fixedly connected to one end of the fixed frame, and the other end of the fixed frame is fixedly connected to the side end of the device body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, through the structural design of an assembly-type disassembly mechanism, enables the jack to be assembled to provide a point of leverage. It solves the problem that existing devices do not have components for lateral support and fixation of the jack. When the coupling needs to be disassembled laterally, the jack also needs to be placed horizontally in the air. The jack's top plate needs to be placed on the shaft so that the direction of the jack's force is in the same straight line as the central axis of the coupling, that is, the direction of the force is also lateral. At this time, the jack is in a suspended state and cannot provide an effective point of leverage. This invention improves convenience. 2. This invention, through the structural design of the assembly-type dismantling mechanism, achieves the function of automatically adjusting to adapt to the dismantling of different pairs of wheels. This solves the problem that if there is no component that can automatically adjust to adapt to different sizes of wheels, the existing device cannot effectively adapt to the dismantling of different sizes of wheels, thus having limitations, thereby improving applicability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional first structural schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram of the second structure of the present invention; Figure 3 This is a partial cross-sectional structural diagram of the present invention; Figure 4 For the present invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 5 For the present invention Figure 1 Enlarged structural diagram at point B; Figure 6 For the present invention Figure 2 Enlarged structural diagram at point C; Figure 7 For the present invention Figure 2 Enlarged structural diagram at point D; Figure 8 For the present invention Figure 3 Enlarged structural diagram at point E in the middle.

[0017] In the diagram: 1. Main body of the device; 2. Jack; 10. Fixed sleeve; 11. Pressing plate; 12. First fixed seat; 13. First rotating head; 14. Rotating rod; 15. Second rotating head; 16. Second fixed seat; 17. Fixed support frame; 18. First fixed block; 19. Moving rod; 20. Limiting plate; 21. Protective pad; 22. Return spring; 23. Second fixed block; 24. First guide rod; 25. First limiting block; 26. Second guide rod; 27. Second limiting block; 28. Fixed platform; 29. ​​Positioning rod; 30. Third fixed block; 31. Guide rail; 32. Moving slider; 33. Fixed rod; 34. Clamping block; 35. First fixed plate; 36. Third rotating head; 37. Fixed sleeve block; 38. Hand-operated threaded rod; 39. Second fixed plate; 40. Fixed frame. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1-8 The scraper conveyor reducer maintenance and fixing bracket shown includes a device body 1; a jack 2 is provided at the rear end of the device body 1, and an assembly-type dismantling mechanism is provided between the device body 1 and the jack 2. The assembled dismantling mechanism includes a fixed sleeve 10, which is located at the middle of the rear end of the main body 1 of the device. The front end of the fixed sleeve 10 is fixedly connected to the rear end of the main body 1 of the device. A pressing plate 11 is provided above the fixed sleeve 10. The left and right sides of the bottom end of the pressing plate 11 are also provided with first fixed seats 12, and the bottom end of the pressing plate 11 is fixedly connected to the top end of the first fixed seat 12. The top end of the first rotating head 13 is sleeved on the outer side of the bottom end of the first fixed seat 12, and the first fixed seat 12 is rotatably connected to the first rotating head 13. The bottom end of the first rotating head 13 is fixedly connected to the top end of the rotating rod 14, which is a circular rod design. When working, the pressing plate 11 is pressed inward. When the pressing plate 11 is pressed inward, it will drive the first fixed seats 12 at both ends of the bottom of the pressing plate 11 to move downward at the same time. When the first fixed seats 12 move downward, they will drive the first rotating head 13 and the rotating rod 14 to move simultaneously. The first rotating head 13 rotates along the outside of the first fixed seat 12.

[0020] Furthermore, the bottom end of the rotating rod 14 is fixedly connected to the top end of the second rotating head 15, the bottom end of the second rotating head 15 is sleeved on the outside of the second fixed seat 16, and the second rotating head 15 is rotatably connected to the second fixed seat 16. The inner wall of the second rotating head 15 is circular. The bottom end of the second fixed seat 16 is fixedly connected to the top end of the fixed support frame 17, and the bottom end of the fixed support frame 17 is fixedly connected to the top end of the first fixed block 18. During operation, the first rotating head 13 and the rotating rod 14 move simultaneously. The first rotating head 13 rotates along the outer side of the first fixed seat 12, and at the same time, the first rotating head 13 drives the rotating rod 14 to rotate. When the rotating rod 14 rotates, the bottom end of the rotating rod 14 will drive the second rotating head 15 to rotate along the outer side of the second fixed seat 16, and at the same time apply a pushing force to the second fixed seat 16, causing the second fixed seat 16 to move outward. When the second fixed seat 16 moves outward, it also drives the fixed support frame 17 and the first fixed block 18 to move outward.

[0021] Furthermore, the side end of the first fixing block 18 is fixedly connected to one end of the moving rod 19, and the other end of the moving rod 19 passes through the side end of the fixing sleeve 10 to reach the inside of the fixing sleeve 10 and is fixedly connected to one side of the limiting plate 20. The moving rod 19 is slidably connected to the fixing sleeve 10, and the moving rod 19 is a circular rod design. When the first fixed block 18 moves outward during operation, it will drive the moving rod 19 to move outward along the inside of the fixed sleeve 10. At the same time, the moving rod 19 will drive the limiting plate 20 to move outward.

[0022] Furthermore, a return spring 22 is sleeved on the outside of the moving rod 19. One end of the return spring 22 is fixedly connected to the outside of the fixed sleeve 10, and the other end of the return spring 22 is fixedly connected to the first fixed block 18. When in operation, the movement of the first fixed block 18 will pull the return spring 22 to extend.

[0023] Furthermore, the front end of the first fixing block 18 is fixedly connected to the rear end of the second fixing block 23. The second fixing block 23 is sleeved on the outside of the first guide rod 24, and the second fixing block 23 is slidably connected to the first guide rod 24. One end of the first guide rod 24 is fixedly connected to the fixing sleeve 10, and the other end of the first guide rod 24 is fixedly connected to the first limiting block 25. The first guide rod 24 is a circular rod design. When in operation, the first fixing block 18 moves, which will cause the second fixing block 23 to move along the outside of the first guide rod 24, and the first limiting block 25 is used to limit the position of the second fixing block 23.

[0024] Furthermore, the rear end of the fixed sleeve 10 is fixedly connected to the front end of the fixed platform 28, the top end of the fixed platform 28 is fixedly connected to the bottom end of the second guide rod 26, the top end of the second guide rod 26 is fixedly connected to the bottom end of the second limiting block 27, a pressing plate 11 is sleeved on the outside of the second guide rod 26, and the pressing plate 11 is slidably connected to the second guide rod 26. The second guide rod 26 is a circular rod design. During operation, the pressing plate 11 moves downwards, which will simultaneously follow the outer side of the second guide rod 26. The fixing platform 28 is used to fix and support the second guide rod 26, while the second limiting block 27 can prevent the pressing plate 11 from disengaging from the outer side of the second guide rod 26.

[0025] Furthermore, the front end of the jack 2 is inserted inside the fixed sleeve 10, and the jack 2 is slidably connected to the fixed sleeve 10. The other side of the limiting plate 20 is fixedly connected to one side of the protective pad 21, and the other side of the protective pad 21 abuts against the side end of the jack 2. The protective pad 21 is made of rubber. When working, the jack 2 is pulled outwards at both ends. When the jack 2 is pulled outwards, it will move outwards along the inside of the fixed sleeve 10 until it is completely disengaged. When the jack 2 is inserted into the fixed sleeve 10 for fixation, the protective pad 21 will resist the jack 2 to provide stability.

[0026] Furthermore, the bottom end of the jack 2 is fixedly connected to one end of the positioning rod 29, the other end of the positioning rod 29 is inserted into the third fixing block 30, and the positioning rod 29 is slidably connected to the third fixing block 30. The top end of the third fixing block 30 is fixedly connected to the bottom end of the fixing sleeve 10, and the inner wall of the third fixing block 30 is circular. During operation, jack 2 drives positioning rod 29 to move outward along the inside of third fixing block 30 until it is completely disengaged.

[0027] Furthermore, guide rails 31 are also fixedly connected to the left and right sides of the rear end of the main body 1. A movable slider 32 is sleeved on the outer side of the guide rail 31, and the movable slider 32 is slidably connected to the guide rail 31. The inner wall of the movable slider 32 is T-shaped. The rear end of the movable slider 32 is fixedly connected to the front end of the fixed rod 33, and the rear end of the fixed rod 33 is fixedly connected to the front end of the locking block 34. During operation, the movable slider 32 moves along the outer side of the guide rail 31 at the rear end of the main body 1. At the same time, as the movable slider 32 moves, it drives the fixed rod 33 and the locking block 34 to move and adjust synchronously until it reaches the appropriate position and then stops rotating.

[0028] Furthermore, the rear end of the movable slider 32 is fixedly connected to the front end of the first fixed plate 35, the side end of the first fixed plate 35 is fixedly connected to the fixed sleeve block 37, the fixed sleeve block 37 is sleeved on the outside of the third rotating head 36, and the fixed sleeve block 37 is rotatably connected to the third rotating head 36. The inner wall of the fixed sleeve block 37 is circular. The side end of the third rotating head 36 is fixedly connected to one end of the hand-rotated threaded rod 38. The outside of the hand-rotated threaded rod 38 is sleeved with a second fixed plate 39, and the hand-rotated threaded rod 38 is threadedly connected to the second fixed plate 39. The front end of the second fixed plate 39 is fixedly connected to one end of the fixed frame 40, and the other end of the fixed frame 40 is fixedly connected to the side end of the device body 1. During operation, the threaded rod 38 is rotated by hand. When the threaded rod 38 is rotated, it will rotate along the inside of the second fixed plate 39 and move inward. The fixed frame 40 is used to fix and support the position of the second fixed plate 39. At the same time, when the threaded rod 38 is rotated by hand, it will drive the third rotating head 36 to rotate along the inside of the fixed sleeve block 37 and push the first fixed plate 35 and the movable slider 32 to move inward.

[0029] Working principle: When disassembly is required, simply press the pressing plate 11 inward. When the pressing plate 11 is pressed inward, it will cause the first fixing seats 12 at both ends of the bottom of the pressing plate 11 to move downward simultaneously. When the first fixing seats 12 move downward, it will cause the first rotating head 13 and the rotating rod 14 to move simultaneously. The first rotating head 13 rotates along the outside of the first fixing seat 12, and at the same time, the first rotating head 13 drives the rotating rod 14 to rotate. When the rotating rod 14 rotates, the bottom end of the rotating rod 14 will drive the second rotating head 15 to rotate along the outside of the second fixing seat 16, and at the same time, it will apply a pushing force to the second fixing seat 16, causing the second fixing seat 16 to move outward. When the second fixing seat 16 moves outward, it will also cause the fixing support frame 17 and the first fixing block 18 to move outward. At the same time, when the first fixing block 18 moves outward, it will cause the moving rod 19 to move outward along the inside of the fixing sleeve 10. Simultaneously, the moving rod 19 drives the limiting plate 20 and the protective pad 21 to move outward until the limiting plate 20 abuts against the inner wall of the fixed sleeve 10. At the same time, the movement of the first fixed block 18 will pull the return spring 22 to extend. When the first fixed block 18 moves, it will drive the second fixed block 23 to move along the outside of the first guide rod 24. The first limiting block 25 is used to limit the position of the second fixed block 23. At the same time, when the pressing plate 11 moves downward, it will move along the outside of the second guide rod 26. The fixed platform 28 is used to fix and support the second guide rod 26. At the same time, the second limiting block 27 can prevent the pressing plate 11 from disengaging from the outside of the second guide rod 26. Then, the jack 2 is pulled outward at both ends. When the jack 2 is pulled outward, it will move outward along the inside of the fixed sleeve 10 until it is completely disengaged. At the same time, the jack 2 drives the positioning rod 29 to move outward along the inside of the third fixed block 30 until it is completely disengaged.

[0030] When the device needs to be adjusted to fit different sized wheels, simply rotate the threaded rod 38 by hand. When the threaded rod 38 is rotated, it will rotate along the inside of the second fixed plate 39 and move inward. The fixed frame 40 is used to fix and support the position of the second fixed plate 39. At the same time, when the threaded rod 38 is rotated, it will drive the third rotating head 36 to rotate along the inside of the fixed sleeve block 37 and push the first fixed plate 35 and the movable slider 32 to move inward. When the movable slider 32 moves, it will move along the outside of the guide rail 31 at the rear end of the device body 1. At the same time, when the movable slider 32 moves, it will drive the fixed rod 33 and the locking block 34 to move and adjust synchronously until the appropriate position is reached and then the rotation stops.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A maintenance and fixing bracket for a scraper conveyor reducer, comprising a main body (1); characterized in that: A jack (2) is provided at the rear end of the main body (1) of the device, and an assembly-type dismantling mechanism is provided between the main body (1) of the device and the jack (2); The assembled dismantling mechanism includes a fixed sleeve (10), which is located at the middle of the rear end of the main body (1) of the device. The front end of the fixed sleeve (10) is fixedly connected to the rear end of the main body (1). A pressing plate (11) is provided above the fixed sleeve (10). A first fixed seat (12) is also provided on the left and right sides of the bottom end of the pressing plate (11). The bottom end of the pressing plate (11) is fixedly connected to the top end of the first fixed seat (12). The top end of the first rotating head (13) is sleeved on the outer side of the bottom end of the first fixed seat (12). The first fixed seat (12) is rotatably connected to the first rotating head (13). The bottom end of the first rotating head (13) is fixedly connected to the top end of the rotating rod (14).

2. The scraper conveyor reducer maintenance fixing bracket according to claim 1, characterized in that: The bottom end of the rotating rod (14) is fixedly connected to the top end of the second rotating head (15). The bottom end of the second rotating head (15) is sleeved on the outside of the second fixed seat (16), and the second rotating head (15) is rotatably connected to the second fixed seat (16). The bottom end of the second fixed seat (16) is fixedly connected to the top end of the fixed support frame (17), and the bottom end of the fixed support frame (17) is fixedly connected to the top end of the first fixed block (18).

3. The scraper conveyor reducer maintenance fixing bracket according to claim 2, characterized in that: The first fixed block (18) is fixedly connected to one end of the moving rod (19), and the other end of the moving rod (19) passes through the side end of the fixed sleeve (10) to reach the inside of the fixed sleeve (10) and is fixedly connected to one side of the limiting plate (20). The moving rod (19) is slidably connected to the fixed sleeve (10).

4. The scraper conveyor reducer maintenance fixing bracket according to claim 3, characterized in that: A reset spring (22) is sleeved on the outside of the moving rod (19). One end of the reset spring (22) is fixedly connected to the outside of the fixed sleeve (10), and the other end of the reset spring (22) is fixedly connected to the first fixed block (18).

5. A maintenance and fixing bracket for a scraper conveyor reducer according to claim 4, characterized in that: The front end of the first fixing block (18) is fixedly connected to the rear end of the second fixing block (23). The second fixing block (23) is sleeved on the outside of the first guide rod (24), and the second fixing block (23) is slidably connected to the first guide rod (24). One end of the first guide rod (24) is fixedly connected to the fixing sleeve (10), and the other end of the first guide rod (24) is fixedly connected to the first limiting block (25).

6. A maintenance and fixing bracket for a scraper conveyor reducer according to claim 5, characterized in that: The rear end of the fixed sleeve (10) is fixedly connected to the front end of the fixed platform (28) at the upper position. The top end of the fixed platform (28) is fixedly connected to the bottom end of the second guide rod (26). The top end of the second guide rod (26) is fixedly connected to the bottom end of the second limiting block (27). A pressing plate (11) is sleeved on the outside of the second guide rod (26), and the pressing plate (11) is slidably connected to the second guide rod (26).

7. A maintenance and fixing bracket for a scraper conveyor reducer according to claim 6, characterized in that: The fixed sleeve (10) is inserted with the front end of the jack (2) and the fixed sleeve (10) is slidably connected to the jack (2). The other side of the limiting plate (20) is fixedly connected to one side of the protective pad (21), and the other side of the protective pad (21) abuts against the side end of the jack (2).

8. A maintenance and fixing bracket for a scraper conveyor reducer according to claim 7, characterized in that: The bottom end of the jack (2) is fixedly connected to one end of the positioning rod (29), the other end of the positioning rod (29) is inserted into the third fixing block (30), and the positioning rod (29) is slidably connected to the third fixing block (30). The top end of the third fixing block (30) is fixedly connected to the bottom end of the fixing sleeve (10).

9. A maintenance and fixing bracket for a scraper conveyor reducer according to claim 8, characterized in that: The left and right sides of the rear end of the main body (1) of the device are also fixedly connected to guide rails (31). A movable slider (32) is sleeved on the outside of the guide rail (31), and the movable slider (32) is slidably connected to the guide rail (31). The rear end of the movable slider (32) is fixedly connected to the front end of the fixed rod (33), and the rear end of the fixed rod (33) is fixedly connected to the front end of the locking block (34).

10. A maintenance and fixing bracket for a scraper conveyor reducer according to claim 9, characterized in that: The rear end of the movable slider (32) is fixedly connected to the front end of the first fixed plate (35). The side end of the first fixed plate (35) is fixedly connected to the fixed sleeve (37). The fixed sleeve (37) is sleeved on the outside of the third rotating head (36), and the fixed sleeve (37) is rotatably connected to the third rotating head (36). The side end of the third rotating head (36) is fixedly connected to one end of the hand-rotated threaded rod (38). The outside of the hand-rotated threaded rod (38) is sleeved with a second fixed plate (39), and the hand-rotated threaded rod (38) is threadedly connected to the second fixed plate (39). The front end of the second fixed plate (39) is fixedly connected to one end of the fixed frame (40), and the other end of the fixed frame (40) is fixedly connected to the side end of the device body (1).

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