Supporting and adjusting device for hydraulic lifting oil cylinder

Abstract

The invention discloses a hydraulic lifting oil cylinder supporting and adjusting device, and relates to the field of hydraulic lifting oil cylinder machining, the hydraulic lifting oil cylinder supporting and adjusting device comprises a supporting frame, the top of the supporting frame is movably connected with a bottom mounting assembly, and the two ends of the top of the bottom mounting assembly are symmetrically and movably connected with mounting frames; connecting blocks are symmetrically and movably connected to the two ends of the right side of the top of the supporting frame, supporting columns are symmetrically installed at the bottoms of the two connecting blocks, connecting columns are installed on the outer walls of the supporting columns, clamping blocks are inserted into the side edges of the supporting columns, supporting bases are arranged at the tops of the connecting columns, and adjusting assemblies are symmetrically installed in the centers of the left sides of the two top mounting assemblies. According to the supporting and adjusting device for the hydraulic lifting oil cylinder, the supporting and adjusting device can be matched with hydraulic lifting oil cylinders of various sizes for installation, the device can be adjusted according to the installation position and angle of the hydraulic lifting oil cylinder, therefore, the supporting effect on the hydraulic lifting oil cylinder can be effectively improved, and the working efficiency of the hydraulic lifting oil cylinder can be guaranteed.

Description

Technical Field

[0001] The invention relates to the processing field of a hydraulic lifting oil cylinder, and in particular to a hydraulic lifting oil cylinder support adjustment device. Background Art

[0002] The hydraulic lifting cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic lifting cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic lifting cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application scenario, and other devices are indispensable.

[0003] When the hydraulic lifting cylinder is working, it needs to be placed in a position that is adapted to the structure to which it is connected. As a result, it may tilt due to gravity during lifting work, which will affect the lifting accuracy and seriously affect the integrity of its connecting structure, which may cause damage to it and further affect the service life of the hydraulic lifting cylinder.

[0004] Therefore, it is necessary to propose a hydraulic lifting cylinder support adjustment device to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a hydraulic lifting cylinder support adjustment device, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A hydraulic lifting cylinder support adjustment device comprises a support frame, a first screw rod is rotatably connected in the inner cavity of the support frame, a bottom mounting assembly is movably connected to the top of the support frame, two ends of the top of the bottom mounting assembly are symmetrically movably connected to the mounting frame, an adjustment rod is rotatably connected to the left side of the top of the support frame, and a mounting plate is arranged on the top of the adjustment rod; The two ends of the right side of the top of the support frame are symmetrically and movably connected with connecting blocks, the bottoms of the two connecting blocks are symmetrically installed with supporting columns, the outer walls of the supporting columns are installed with connecting columns, and the sides of the supporting columns are plugged with card blocks; A support seat is provided on the top of the connecting column, and top mounting components are symmetrically rotatably connected to the two left ends of the support seat, and adjustment components are symmetrically installed in the middle of the left sides of the two top mounting components.

[0007] Preferably, a first movable groove is opened in the center of the top of the support frame, and the first screw rod is rotatably connected in the inner cavity of the first movable groove. A second movable groove is opened in the center of the top of the bottom mounting assembly, and a bidirectional screw rod is rotatably connected in the inner cavity of the second movable groove.

[0008] Preferably, the bottom of the bottom mounting assembly is movably connected in the inner cavity of the first movable groove and is threadedly connected to the outer wall of the first screw rod, and the bottom of the mounting frame is movably connected in the inner cavity of the second movable groove and is threadedly connected to the outer wall of the bidirectional screw rod. A turning handle is installed at one end of the first screw rod and the bidirectional screw rod, and the top of the turning handle at the bottom extends to the top of the support frame, and the turning handle at the top is installed on the outer wall of the bottom mounting assembly.

[0009] Preferably, the top of the inner cavity of the adjusting rod is threadedly connected to a second screw rod, the top of the second screw rod is rotatably connected to the bottom of the mounting plate, and the side of the mounting plate is threadedly connected to a bolt.

[0010] Preferably, a movable groove is opened on the right side of the top of the support frame, a fixed column is installed in the inner cavity of the movable groove, and the bottom of the connecting block is movably connected in the inner cavity of the movable groove and sleeved on the outer wall of the fixed column.

[0011] Preferably, the top of the connecting column is rotatably connected to a first movable seat, the left side of the first movable seat is rotatably connected to a second movable seat, the second movable seat is installed at the bottom of the right side of the support seat, and the outer wall of the connecting column is provided with a card slot, and the card block is inserted into the inner cavity of the connecting column through the card slot.

[0012] Preferably, a groove is provided at the top of the side of the connecting column, a guide rod is installed in the inner cavity of the groove, a limit block is installed on the outer wall of the guide rod, a spring is wound on the outer wall of the guide rod, the block is movably connected in the inner cavity of the groove, the block is sleeved on the outer wall of the limit block and the guide rod, one end of the spring is installed in the inner cavity of the block, and the other end of the spring is installed on the outer wall of the limit block.

[0013] Preferably, a rotating shaft is installed on the right side of the opposite side of the two top mounting components, the rotating shaft is installed on the left side of the inner cavity of the support seat, and the top mounting components are movably connected to the two ends of the left side of the support seat.

[0014] Preferably, a movable block is rotatably connected in the inner cavity of the adjusting component at one end, and an adjusting handle is rotatably connected to the outer wall of the adjusting component at the other end. The end of the adjusting handle close to the movable block is rotatably connected to a third screw rod, one end of the third screw rod is threadedly connected to the outer wall of the movable block, and the other end of the third screw rod is rotatably connected in the inner cavity of one of the adjusting components.

[0015] Beneficial Effects Compared with the prior art, the present invention provides a hydraulic lifting cylinder support adjustment device, which has the following beneficial effects: 1. The hydraulic lifting cylinder support and adjustment device can drive the first screw to rotate in the inner cavity of the first movable groove by rotating the bottom handle, so that the bottom of the bottom mounting assembly can be threadedly connected to the first screw. At this time, the mounting frame can be adjusted laterally, and the bidirectional screw can be driven to rotate in the inner cavity of the second movable groove by rotating the top handle. In this way, the distance between the two mounting frames can be adjusted. When supporting the hydraulic lifting cylinder, its bottom can be limited by the two mounted mounting frames, and it can be installed on the top of the bottom mounting assembly. At the same time, the position of the hydraulic lifting cylinder can be adjusted by the bottom mounting assembly, which can meet the installation position of the hydraulic lifting cylinder and support and adjust it.

[0016] 2. The hydraulic lifting cylinder support adjustment device can make the second screw rod be threadedly connected with the adjusting rod by rotating the adjusting rod. At this time, the height of the mounting plate can be adjusted, so that the left side of the hydraulic lifting cylinder can be supported by the mounting plate. The height of the mounting plate is adjustable and can be adapted to support hydraulic lifting cylinders of various sizes.

[0017] 3. The hydraulic lifting cylinder support adjustment device enables the connecting block to move on the top of the support frame through the movable groove and fixed column, so as to adjust the position of the two support columns, so as to facilitate the adjustment of the position of the top mounting component according to the position of the hydraulic lifting cylinder, so as to meet the support requirements. By setting the first movable seat and the second movable seat, the adjustment range of the position of the top mounting component can be further improved, so as to meet the support range of most hydraulic lifting cylinders and effectively improve the use experience.

[0018] 4. The hydraulic lifting cylinder support and adjustment device has a slot on the outer wall of the connecting column so that the block on the outer wall of the supporting column can be inserted into the inner cavity of the slot, thereby limiting the height of the connecting column. At the same time, the block can be pressed into the inner cavity of the supporting column to disengage the block from the slot, thereby continuing to adjust the height of the connecting column. The spring is set to bounce the block outward at any time, thereby ensuring the tightness of the connecting column after adjustment, so that when supporting the hydraulic lifting cylinder, there will be no shaking or falling.

[0019] 5. The hydraulic lifting cylinder support and adjustment device can drive the third screw rod to rotate by rotating the adjusting handle, so that the movable block can be threadedly connected to the third screw rod. At this time, the movable block can drive one of the adjustment components to approach the other adjustment component, so that the two top mounting components can be merged. When supporting the hydraulic lifting cylinder, the two top mounting components can be installed on the outer wall of the hydraulic lifting cylinder, so as to support the hydraulic lifting cylinder. The adjustable range of the top mounting component is large, and it can adapt to hydraulic lifting cylinders of various sizes to support them. When the hydraulic lifting cylinder is working, it can effectively improve the stability of the hydraulic lifting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the support frame of the present invention; Figure 3 The present invention Figure 2 The enlarged view of point A in the middle; Figure 4 It is a structural schematic diagram of the support column of the present invention; Figure 5 The present invention Figure 4 The enlarged view of point B in the middle; Figure 6 Is a schematic diagram of the structure of the top mounting assembly of the present invention; Figure 7 It is a schematic diagram of the structure of the regulating component of the present invention.

[0021] In the figure: 1. support frame; 2. movable groove; 3. fixed column; 4. connecting block; 5. first movable groove; 6. turning handle; 7. first screw rod; 8. bottom mounting assembly; 9. second movable groove; 10. bidirectional screw rod; 11. mounting frame; 12. adjusting rod; 13. second screw rod; 14. mounting plate; 15. support column; 16. connecting column; 17. slot; 18. block; 19. limit block; 20. guide rod; 21. spring; 22. first movable seat; 23. second movable seat; 24. support seat; 25. top mounting assembly; 26. rotating shaft; 27. adjusting assembly; 28. adjusting handle; 29. ​​third screw rod; 30. movable block. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] like Figure 1-Figure 3As shown, a hydraulic lifting cylinder support adjustment device comprises a support frame 1, a first screw rod 7 is rotatably connected in the inner cavity of the support frame 1, a bottom mounting assembly 8 is movably connected to the top of the support frame 1, two ends of the top of the bottom mounting assembly 8 are symmetrically movably connected to mounting frames 11, an adjustment rod 12 is rotatably connected to the left side of the top of the support frame 1, a mounting plate 14 is arranged on the top of the adjustment rod 12, a first movable groove 5 is opened in the middle of the top of the support frame 1, the first screw rod 7 is rotatably connected in the inner cavity of the first movable groove 5, a second movable groove 9 is opened in the middle of the top of the bottom mounting assembly 8, and a two-way movable rod 12 is rotatably connected in the inner cavity of the second movable groove 9. The screw rod 10, the bottom of the bottom mounting assembly 8 is movably connected in the inner cavity of the first movable groove 5 and is threadedly connected to the outer wall of the first screw rod 7, the bottom of the mounting frame 11 is movably connected in the inner cavity of the second movable groove 9 and is threadedly connected to the outer wall of the bidirectional screw rod 10, one end of the first screw rod 7 and the bidirectional screw rod 10 are both installed with a turning handle 6, the top of the bottom turning handle 6 extends to the top of the support frame 1, and the top turning handle 6 is installed on the outer wall of the bottom mounting assembly 8, the top of the inner cavity of the adjusting rod 12 is threadedly connected with the second screw rod 13, the top of the second screw rod 13 is rotatably connected to the bottom of the mounting plate 14, and the side of the mounting plate 14 is threadedly connected with a bolt; By rotating the turning handle 6 at the bottom, the first screw rod 7 can be driven to rotate in the inner cavity of the first movable groove 5, so that the bottom of the bottom mounting assembly 8 can be threadedly connected with the first screw rod 7. At this time, the mounting bracket 11 can be adjusted laterally. By rotating the turning handle 6 set at the top, the bidirectional screw rod 10 can be driven to rotate in the inner cavity of the second movable groove 9, so that the distance between the two mounting brackets 11 can be adjusted. When supporting the hydraulic lifting cylinder, the bottom of the hydraulic lifting cylinder can be limited by the two set mounting brackets 11, and it can be installed on the top of the bottom mounting assembly 8. At the same time, the position of the hydraulic lifting cylinder can be adjusted by the bottom mounting assembly 8, which can meet the installation position of the hydraulic lifting cylinder and support and adjust it. By rotating the adjusting rod 12, the second screw rod 13 can be threadedly connected to the adjusting rod 12. At this time, the height of the mounting plate 14 can be adjusted, so that the left side of the hydraulic lifting cylinder can be supported by the mounting plate 14. The height of the mounting plate 14 is adjustable and can be adapted to support hydraulic lifting cylinders of various sizes.

[0024] like Figure 1 , Figure 4 , Figure 5As shown, a hydraulic lifting cylinder support and adjustment device, the two ends of the top right side of the support frame 1 are symmetrically and movably connected with connecting blocks 4, the bottoms of the two connecting blocks 4 are symmetrically installed with support columns 15, the outer walls of the support columns 15 are installed with connecting columns 16, and the sides of the support columns 15 are plugged with clamping blocks 18. A movable groove 2 is opened on the right side of the top of the support frame 1, and a fixed column 3 is installed in the inner cavity of the movable groove 2. The bottom of the connecting block 4 is movably connected in the inner cavity of the movable groove 2 and sleeved on the outer wall of the fixed column 3. The top of the connecting column 16 is rotatably connected with a first movable seat 22, and the left side of the first movable seat 22 is rotatably connected with a second movable seat 23. The second movable seat 23 is installed at the bottom of the right side of the support seat 24. The outer wall of the connecting column 16 is provided with a card slot 17. The card block 18 is inserted into the inner cavity of the connecting column 16 through the card slot 17. The top of the side of the connecting column 16 is provided with a groove. A guide rod 20 is installed in the inner cavity of the groove. A limit block 19 is installed on the outer wall of the guide rod 20. A spring 21 is wound around the outer wall of the guide rod 20. The card block 18 is movably connected in the inner cavity of the groove. The card block 18 is sleeved on the outer wall of the limit block 19 and the guide rod 20. One end of the spring 21 is installed in the inner cavity of the card block 18, and the other end of the spring 21 is installed on the outer wall of the limit block 19. By means of the movable groove 2 and the fixed column 3, the connecting block 4 can be moved on the top of the support frame 1, so as to adjust the positions of the two support columns 15, so as to facilitate the adjustment of the position of the top mounting assembly 25 according to the position of the hydraulic lifting cylinder, so as to meet the support requirements. By means of the first movable seat 22 and the second movable seat 23, the adjustment range of the position of the top mounting assembly 25 can be further improved, so as to meet the support range of most hydraulic lifting cylinders, and effectively improve the use experience; By providing a slot 17 on the outer wall of the connecting column 16, the block 18 on the outer wall of the supporting column 15 can be inserted into the inner cavity of the slot 17, so that the height of the connecting column 16 can be limited. At the same time, the block 18 can be disengaged from the slot 17 by pressing the block 18 into the inner cavity of the supporting column 15, so that the height of the connecting column 16 can continue to be adjusted. The spring 21 can always bounce the block 18 outward, so as to ensure the tightness of the connecting column 16 after adjustment, so that it will not shake or fall when supporting the hydraulic lifting cylinder.

[0025] like Figure 1 , Figure 6 , Figure 7As shown, a hydraulic lifting cylinder support adjustment device is provided with a support seat 24 at the top of the connecting column 16, and the left ends of the support seat 24 are symmetrically rotatably connected with top mounting components 25, and the adjustment components 27 are symmetrically installed in the middle of the left sides of the two top mounting components 25, and the right sides of the opposite sides of the two top mounting components 25 are installed with rotating shafts 26, and the rotating shafts 26 are installed on the left side of the inner cavity of the support seat 24. The top mounting components 25 are movably connected to the two ends of the left side of the support seat 24, and a movable block 30 is rotatably connected in the inner cavity of the adjusting component 27 at one end, and an adjusting handle 28 is rotatably connected to the outer wall of the adjusting component 27 at the other end. The end of the adjusting handle 28 close to the movable block 30 is rotatably connected to a third screw rod 29, one end of the third screw rod 29 is threadedly connected to the outer wall of the movable block 30, and the other end of the third screw rod 29 is rotatably connected in the inner cavity of one of the adjusting components 27; By rotating the adjusting handle 28, the third screw rod 29 can be driven to rotate, so that the movable block 30 can be threadedly connected to the third screw rod 29. At this time, the movable block 30 can drive one of the adjusting components 27 to approach the other adjusting component 27, so that the two top mounting components 25 can be merged. When supporting the hydraulic lifting cylinder, the two top mounting components 25 can be installed on the outer wall of the hydraulic lifting cylinder, so as to support the hydraulic lifting cylinder. The top mounting component 25 has a large adjustable range and can be adapted to hydraulic lifting cylinders of various sizes to support them. When the hydraulic lifting cylinder is working, it can effectively improve the stability of the hydraulic lifting cylinder.

[0026] It should be noted that the present invention is a hydraulic lifting cylinder support adjustment device. When in use, the bottom handle 6 is rotated to drive the first screw rod 7 to rotate in the inner cavity of the first movable groove 5, so that the bottom of the bottom mounting assembly 8 can be threadedly connected with the first screw rod 7. At this time, the mounting frame 11 can be driven to move horizontally, and the hydraulic lifting cylinder to be supported is placed between the two mounting frames 11. The top handle 6 is rotated to drive the bidirectional screw rod 10 to rotate in the inner cavity of the second movable groove 9, so that the bottom of the mounting frame 11 can be threadedly connected thereto. At this time, the two mounting frames 11 can move to the opposite side until they are attached to the bottom of the outer wall of the hydraulic lifting cylinder. Install the top of the hydraulic lifting cylinder at the required position, adjust the mounting plate 14 according to the position of the hydraulic lifting cylinder, rotate the adjusting rod 12 so that the second screw rod 13 can be threadedly connected with the adjusting rod 12, thereby adjusting the height of the mounting plate 14, fit the adjusted mounting plate 14 to the left side of the hydraulic lifting cylinder, and thread the mounting plate 14 and the hydraulic lifting cylinder to support the left side of the hydraulic lifting cylinder; The position of the top mounting assembly 25 is adjusted according to the size and size of the hydraulic lifting cylinder, and the block 18 is pressed into the inner cavity of the support column 15. At this time, the block 18 is disengaged from the inner cavity of the slot 17, and the connecting column 16 is moved up and down on the outer wall of the support column 15 until the top mounting assembly 25 is moved to a suitable position of the hydraulic lifting cylinder through the support seat 24. At this time, the spring 21 will pop out the block 18, so that it is stuck in the inner cavity of the slot 17 at the corresponding position, and the position of the top mounting assembly 25 is adjusted again through the first movable seat 22 and the second movable seat 23. After the adjustment is completed, the adjusting handle 28 is rotated to drive the third screw rod 29 to rotate so that the movable block 30 can be threadedly connected with it. At this time, the two top mounting assemblies 25 can be collected. When the two top mounting assemblies 25 are attached to the two sides of the hydraulic lifting cylinder, the installation of the top of the hydraulic lifting cylinder can be completed. When the hydraulic lifting cylinder is working, the whole can support the hydraulic lifting cylinder.

[0027] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydraulic lifting cylinder support adjustment device, comprising a support frame (1), characterized in that: A first screw rod (7) is rotatably connected in the inner cavity of the support frame (1), a bottom mounting assembly (8) is movably connected to the top of the support frame (1), mounting frames (11) are symmetrically movably connected to the two ends of the top of the bottom mounting assembly (8), an adjustment rod (12) is rotatably connected to the left side of the top of the support frame (1), and a mounting plate (14) is provided on the top of the adjustment rod (12); The two ends of the right side of the top of the support frame (1) are symmetrically and movably connected with connecting blocks (4), the bottoms of the two connecting blocks (4) are symmetrically installed with supporting columns (15), the outer walls of the supporting columns (15) are installed with connecting columns (16), and the sides of the supporting columns (15) are plugged with clamping blocks (18); A support seat (24) is provided at the top of the connecting column (16), and top mounting components (25) are symmetrically rotatably connected at both ends of the left side of the support seat (24), and an adjustment component (27) is symmetrically installed in the middle of the left sides of the two top mounting components (25).

2. A hydraulic lifting cylinder support adjustment device according to claim 1, characterized in that: A first movable groove (5) is provided in the middle of the top of the support frame (1), and the first screw rod (7) is rotatably connected in the inner cavity of the first movable groove (5). A second movable groove (9) is provided in the middle of the top of the bottom mounting assembly (8), and a bidirectional screw rod (10) is rotatably connected in the inner cavity of the second movable groove (9).

3. A hydraulic lifting cylinder support adjustment device according to claim 2, characterized in that: The bottom of the bottom mounting assembly (8) is movably connected in the inner cavity of the first movable groove (5) and is threadedly connected to the outer wall of the first screw rod (7); the bottom of the mounting frame (11) is movably connected in the inner cavity of the second movable groove (9) and is threadedly connected to the outer wall of the bidirectional screw rod (10); a rotating handle (6) is installed at one end of each of the first screw rod (7) and the bidirectional screw rod (10); the top of the rotating handle (6) at the bottom extends to the top of the support frame (1); and the top of the rotating handle (6) is installed on the outer wall of the bottom mounting assembly (8).

4. A hydraulic lifting cylinder support adjustment device according to claim 1, characterized in that: The top of the inner cavity of the adjusting rod (12) is threadedly connected to a second screw rod (13), the top of the second screw rod (13) is rotatably connected to the bottom of a mounting plate (14), and a bolt is threadedly connected to the side of the mounting plate (14).

5. The hydraulic lifting cylinder support adjustment device according to claim 1, characterized in that: A movable groove (2) is provided on the right side of the top of the support frame (1), a fixed column (3) is installed in the inner cavity of the movable groove (2), and the bottom of the connecting block (4) is movably connected in the inner cavity of the movable groove (2) and sleeved on the outer wall of the fixed column (3).

6. A hydraulic lifting cylinder support adjustment device according to claim 1, characterized in that: The top of the connecting column (16) is rotatably connected to a first movable seat (22), the left side of the first movable seat (22) is rotatably connected to a second movable seat (23), the second movable seat (23) is mounted on the bottom of the right side of the support seat (24), the outer wall of the connecting column (16) is provided with a card slot (17), and the card block (18) is inserted into the inner cavity of the connecting column (16) through the card slot (17).

7. The hydraulic lifting cylinder support adjustment device according to claim 1, characterized in that: A groove is provided at the top of the side of the connecting column (16), a guide rod (20) is installed in the inner cavity of the groove, a limit block (19) is installed on the outer wall of the guide rod (20), a spring (21) is wound around the outer wall of the guide rod (20), the clamping block (18) is movably connected in the inner cavity of the groove, the clamping block (18) is sleeved on the limit block (19) and the outer wall of the guide rod (20), one end of the spring (21) is installed in the inner cavity of the clamping block (18), and the other end of the spring (21) is installed on the outer wall of the limit block (19).

8. The hydraulic lifting cylinder support adjustment device according to claim 1, characterized in that: A rotating shaft (26) is installed on the right side of the opposite side of the two top mounting components (25), and the rotating shaft (26) is installed on the left side of the inner cavity of the support seat (24). The top mounting components (25) are movably connected to the two ends of the left side of the support seat (24).

9. The hydraulic lifting cylinder support adjustment device according to claim 1, characterized in that: A movable block (30) is rotatably connected in the inner cavity of the adjusting component (27) at one end, and an adjusting handle (28) is rotatably connected to the outer wall of the adjusting component (27) at the other end. The end of the adjusting handle (28) close to the movable block (30) is rotatably connected to a third screw rod (29). One end of the third screw rod (29) is threadedly connected to the outer wall of the movable block (30), and the other end of the third screw rod (29) is rotatably connected in the inner cavity of one of the adjusting components (27).

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