A ship winch with a cable self-cleaning mechanism

Abstract

This invention relates to the field of ship winch technology, specifically a ship winch with a cable self-cleaning mechanism, comprising: a fixed plate, an extension plate fixed to the surface of the fixed plate, a limit rod provided on the surface of the fixed plate, a sleeve plate provided outside the limit rod, a top plate and a side plate fixed to the surface of the sleeve plate, a rotating shaft provided inside the top plate and the side plate, a cleaning brush fixed to the surface of the rotating shaft, a cleaning rod provided inside the side plate, and the other end of the cleaning rod connected to a connecting plate; the beneficial effect is that the invention proposes that the two sets of rotating shafts are held against the surface of the cable by the support of the first spring and the second spring, so as to clean the surface of the cable; the second L-bar, the first L-bar, the third L-bar, and the fourth L-bar move, driving the connecting plate to move out of the slot; the connecting plate and the cleaning rod are connected; the cleaning rod moves with the connecting plate, so that the cleaning rod enters the interior of the side plate, and the debris on the surface of the cleaning rod falls off.

Description

Technical Field

[0001] This invention relates to the field of ship winch technology, specifically a ship winch with a cable self-cleaning mechanism. Background Technology

[0002] A ship winch mainly consists of a drive system, a transmission mechanism, a drum assembly, a braking system, a control system, and a frame. The drive system provides power, the transmission mechanism transmits power to the drum, the drum winds the cable, the braking system controls the drum's rotation, and the control system operates and monitors the winch.

[0003] In the prior art, patent number CN117284957A, entitled "A High-Stability Ship Winch," includes an electric winding roller, a hydraulic rod, and a suspender. A steel cable is fixedly connected to the outer side of the electric winding roller. A movable seat is fixedly connected to the output end of the hydraulic rod, which is away from the electric winding roller. A servo motor is fixedly connected to the top of the movable seat, and a second winding disc is fixedly connected to the output end of the servo motor. The steel cable is wound multiple times around the outer side of the second winding disc. The suspender is placed on the water surface. The MRU attitude sensor in the suspender can monitor the change in the floating height of the sea surface and transmit the change value to the electric winding roller. This allows the electric winding roller to release part of the steel cable when the waves are high and to wind up part of the steel cable when the sea level drops. Through this setting, the part of the steel cable that is submerged in the seabed can always remain at its original height, and the undulation of the sea surface will not affect the suspended object on the other end.

[0004] However, when existing ship winches are winding cables, the surface of the cables is often covered with debris, resulting in a large accumulation of debris on the surface of the wound cables. This prevents the cables from being evenly wound on the surface of the winding rollers and affects the service life of the cables. Summary of the Invention

[0005] The purpose of this invention is to provide a ship winch with a cable self-cleaning mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a ship winch with a cable self-cleaning mechanism, comprising:

[0007] A fixed plate has an extension plate fixed to its surface. A limit rod is provided on the surface of the fixed plate. A sleeve plate is provided outside the limit rod. A top plate and a side plate are fixed to the surface of the sleeve plate. A rotating shaft is provided inside the top plate and the side plate. A cleaning brush is fixed to the surface of the rotating shaft. A cleaning rod is provided inside the side plate. The other end of the cleaning rod is connected to a connecting plate. A slot is opened on the surface of the side plate. A first L-rod and a second L-rod are fixed to the surface of the connecting plate. A third L-rod and a fourth L-rod are fixed to the other end of the connecting plate.

[0008] Preferably, cables pass through the interior of the top plate and side plate, allowing the cables to move within the top plate and side plate. A take-up roller is provided on one side of the fixed plate, and the cables are wound around the surface of the take-up roller. The fixed plate is provided with two sets of limit rods, and a lead screw is provided on the surface of the fixed plate, allowing the lead screw to rotate between the two sets of fixed plates. A first motor is provided on the surface of the fixed plate, driving the lead screw to rotate. The lead screw passes through the interior of the sleeve plate, and after rotating, it drives the sleeve plate to move. The sleeve plate can move on the surface of the limit rods.

[0009] Preferably, the surface of the top plate is provided with a first sliding groove, the first sliding groove is provided with a first piston rod, a first moving block is inserted into the first sliding groove, the surface of the first moving block is provided with a limit plate, the surface of the top plate is provided with a limit groove, the limit plate on the surface of the first moving block is inserted into the limit groove, the first moving block can move in the first sliding groove, the limit plate on the surface of the first moving block can move in the limit groove, a second motor is fixed on the surface of the first moving block, the second motor moves with the first moving block, one end of the first piston rod is connected to the surface of the first moving block, and the other end is connected to a driving device, the driving device can drive the first piston rod to move in the first sliding groove, the first piston rod drives the first moving block to move, a first spring is provided in the first sliding groove, the first spring is located outside the first piston rod, one end of the first spring is connected to the surface of the first moving block, and the other end is connected to the inner wall of the first sliding groove.

[0010] Preferably, an extension block is fixed inside the side plate, and a second sliding groove is formed on the surface of the extension block. A second moving block is inserted into the second sliding groove and can move within the second sliding groove. A rotating shaft is inserted into the second moving block, and the top of the rotating shaft is inserted into the bottom of the first moving block. A second spring is provided in the second sliding groove, and a second piston rod is provided in the second sliding groove. One end of the second piston rod is connected to the surface of the second moving block, and the other end is connected to a driving device. The driving device drives the second piston rod to move, and the second moving block moves with the second piston rod. One end of the second spring is connected to the surface of the second moving block, and the other end is connected to the inner wall of the second sliding groove.

[0011] Preferably, a cleaning rod is inserted into the inside of the side plate, and the cleaning rod can move inside the side plate. The other end of the cleaning rod is connected to a connecting plate, and the cleaning rod moves with the connecting plate. A slot is opened on the surface of the side plate, and the connecting plate can be inserted into the slot. The second motor can drive the rotating shaft to rotate. Multiple sets of cleaning brushes are fixed on the surface of the rotating shaft. The cleaning brushes rotate with the rotating shaft, and the cable is located between two sets of rotating shafts.

[0012] Preferably, the bottom of the sleeve plate is provided with a material discharge groove, and the material discharge groove is provided in two sets. The surface of the first L rod is provided with a first through hole, and the second L rod is inserted into the first through hole on the surface of the first L rod. The second L rod can move in the first through hole. The surface of the third L rod is provided with a second through hole, and the fourth L rod is inserted into the second through hole. The fourth L rod can move in the second through hole.

[0013] Preferably, when the first L-rod, the second L-rod, the third L-rod, and the fourth L-rod move with the sleeve plate, the ends of the first L-rod, the second L-rod, the third L-rod, and the fourth L-rod can abut against the surfaces of the fixed plate and the extension plate, so that the first L-rod, the second L-rod, the third L-rod, and the fourth L-rod can move. Since the other ends of the first L-rod, the second L-rod, the third L-rod, and the fourth L-rod are connected to the connecting plate, the connecting plate moves, and the connecting plate drives the cleaning rod to move.

[0014] Preferably, the cleaning brush rotates with the rotating shaft, and when the cleaning brush rotates, it will come into contact with the surface of the cable, thereby cleaning the surface of the cable.

[0015] Preferably, when the rotating shaft moves, it approaches the cleaning rod, and the cleaning brush on the surface of the rotating shaft can be locked between the cleaning rods. As the rotating shaft rotates, the cleaning brush continuously passes between the cleaning rods.

[0016] Preferably, the second spring and the first spring have elastic force, such that both the first moving block and the second moving block are close to the direction of the cable, so that the two sets of rotating shafts support the two sides of the cable.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The invention proposes a top plate and side plate with internal rotating shafts. Each rotating shaft has a cleaning brush on its surface. The rotating shafts are rotatable, and two sets of rotating shafts are located on either side of the cable. As the rotating shafts rotate, the cleaning brushes clean the cable surface. A second spring and a first spring are connected to the top and bottom of the rotating shafts. The first and second springs hold the two sets of rotating shafts against the cable surface, cleaning it. The second, first, third, and fourth L-bars move, causing the connecting plate to move out of the slot. The connecting plate connects to the cleaning rod, which moves with the connecting plate, allowing it to enter the side plate and causing debris on its surface to fall off. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the present invention from another perspective.

[0021] Figure 3 This is a schematic diagram of the extension plate structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the top plate structure of the present invention.

[0023] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0024] Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0025] Figure 7 This is a schematic diagram of the sleeve plate structure of the present invention.

[0026] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point C.

[0027] Figure 9 This is a schematic diagram of the connecting plate structure of the present invention.

[0028] In the diagram: 1. Fixed plate; 2. Cable; 3. Rewinding roller; 4. Extension plate; 5. Sleeve plate; 6. Limiting rod; 7. Lead screw; 8. First motor; 9. Top plate; 10. Side plate; 11. First L-rod; 12. First through hole; 13. Second L-rod; 14. First slide groove; 15. First piston rod; 16. Limiting groove; 17. First spring; 18. First moving block; 19. Second motor; 20. Cleaning rod; 21. Rotating shaft; 22. Cleaning brush; 23. Second spring; 24. Second piston rod; 25. Second slide groove; 26. Extension block; 27. Second moving block; 28. Drop chute; 29. ​​Third L-rod; 30. Second through hole; 31. Fourth L-rod; 32. Slot; 33. Connecting plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 1 to 9 The present invention provides a technical solution:

[0031] Example 1: A ship winch with a cable self-cleaning mechanism, comprising: a fixed plate 1, an extension plate 4 fixed to the surface of the fixed plate 1, a limit rod 6 provided on the surface of the fixed plate 1, a sleeve plate 5 provided outside the limit rod 6, a top plate 9 and a side plate 10 fixed to the surface of the sleeve plate 5, a rotating shaft 21 provided inside the top plate 9 and the side plate 10, a cleaning brush 22 fixed to the surface of the rotating shaft 21, a cleaning rod 20 provided inside the side plate 10, the other end of the cleaning rod 20 connected to a connecting plate 33, a slot 32 formed on the surface of the side plate 10, and a fixed... The first L-rod 11 and the second L-rod 13, the third L-rod 29 and the fourth L-rod 31 are fixed at the other end of the connecting plate 33. The ends of the first L-rod 11, the second L-rod 13, the third L-rod 29 and the fourth L-rod 31 can abut against the surface of the fixed plate 1 and the extension plate 4, so that the second L-rod 13, the first L-rod 11, the third L-rod 29 and the fourth L-rod 31 can move, driving the connecting plate 33 to move out of the slot 32. The connecting plate 33 is connected to the cleaning rod 20. The cleaning rod 20 moves with the connecting plate 33, so that the cleaning rod 20 enters the interior of the side plate 10.

[0032] Example 2: Based on Example 1, a cable 2 passes through the interior of the top plate 9 and the side plate 10, allowing the cable 2 to move within them. A take-up roller 3 is provided on one side of the fixed plate 1, and the cable 2 is wound around its surface. The fixed plate 1 has two sets of fixed plates, and two sets of limiting rods 6 are fixed to its surface. A lead screw 7 is provided on the surface of the fixed plate 1, allowing it to rotate between the two sets of fixed plates 1. A first motor 8 is provided on the surface of the fixed plate 1, driving the lead screw 7 to rotate. The lead screw 7 passes through the interior of the sleeve plate 5, and its rotation causes the sleeve plate 5 to move. The sleeve plate 5 can move on the surface of the limiting rods 6. A cleaning rod 20 is inserted into the interior of the side plate 10, allowing the cleaning rod 20 to move on the side plate 10. The cleaning rod 20 moves inside the plate 10. The other end of the cleaning rod 20 is connected to the connecting plate 33. The cleaning rod 20 moves with the connecting plate 33. The surface of the side plate 10 has a slot 32. The connecting plate 33 can be inserted into the slot 32. The second motor 19 can drive the rotating shaft 21 to rotate. Multiple sets of cleaning brushes 22 are fixed on the surface of the rotating shaft 21. The cleaning brushes 22 rotate with the rotating shaft 21. The cable 2 is located between the two sets of rotating shafts 21. The bottom of the sleeve plate 5 has a material drop chute 28. The material drop chute 28 has two sets. The surface of the first L rod 11 has a first through hole 12. The second L rod 13 is inserted into the first through hole 12 on the surface of the first L rod 11. The second L rod 13 can move in the first through hole 12. The third L rod 29 A second through hole 30 is provided on the surface of the device. The fourth L-rod 31 is inserted into the second through hole 30 and can move within the second through hole 30. When the first L-rod 11, the second L-rod 13, the third L-rod 29, and the fourth L-rod 31 move with the sleeve plate 5, the ends of the first L-rod 11, the second L-rod 13, the third L-rod 29, and the fourth L-rod 31 can abut against the surfaces of the fixed plate 1 and the extension plate 4, allowing the first L-rod 11, the second L-rod 13, the third L-rod 29, and the fourth L-rod 31 to move. Since the other ends of the first L-rod 11, the second L-rod 13, the third L-rod 29, and the fourth L-rod 31 are connected to the connecting plate 33, the connecting plate 33 moves, causing the cleaning rod 20 to move forward. As the cable moves, the cleaning brush 22 rotates with the rotating shaft 21. When the cleaning brush 22 rotates, it will come into contact with the surface of the cable 2 and clean the surface of the cable 2. The rotating shaft 21 is pulled by the first piston rod 15 and the second piston rod 24, causing the top and bottom of the rotating shaft 21 to move laterally, so that the rotating shaft 21 moves away from the surface of the cable 2 and moves closer to the cleaning rod 20. As the rotating shaft 21 continues to rotate, the cleaning brush 22 passes between the cleaning rods 20 and the cleaning rods 20 clean the debris off the surface of the cleaning brush 22. As the top plate 9 and the side plate 10 move, the ends of the first L rod 11, the second L rod 13, the third L rod 29 and the fourth L rod 31 can be held against the surface of the fixed plate 1 and the extension plate 4.

[0033] A first sliding groove 14 is formed on the surface of the top plate 9, and a first piston rod 15 is provided in the first sliding groove 14. A first moving block 18 is inserted into the first sliding groove 14, and a limit plate is provided on the surface of the first moving block 18. A limit groove 16 is formed on the surface of the top plate 9, and the limit plate on the surface of the first moving block 18 is inserted into the limit groove 16. The first moving block 18 can move in the first sliding groove 14, and the limit plate on the surface of the first moving block 18 can move in the limit groove 16. A second motor 19 is fixed on the surface of the first moving block 18, and the second motor 19 moves with the first moving block 18. One end of the first piston rod 15 is connected to the surface of the first moving block 18, and the other end is connected to a driving device, which can drive the first piston rod 15 to move in the first sliding groove 14. The first piston rod 15 drives the first moving block 18 to move. A first spring 17 is provided in the first slide groove 14. The first spring 17 is located outside the first piston rod 15. One end of the first spring 17 is connected to the surface of the first moving block 18, and the other end is connected to the inner wall of the first slide groove 14. The top and bottom of the rotating shaft 21 are connected to the second spring 23 and the first spring 17. The first spring 17 and the second spring 23 support the two sets of rotating shafts 21 to support the surface of the cable 2 and clean the surface of the cable 2. Two sets of rotating shafts 21 are provided inside the top plate 9 and the side plate 10. When a large amount of debris is wrapped around the surface of the rotating shaft 21, the first piston rod 15 and the second piston rod 24 pull the rotating shaft 21 to move, so that the top and bottom of the rotating shaft 21 move laterally.

[0034] An extension block 26 is fixed inside the side plate 10. A second sliding groove 25 is formed on the surface of the extension block 26. A second moving block 27 is inserted into the second sliding groove 25 and can move within it. A rotating shaft 21 is inserted into the second moving block 27, with its top inserted into the bottom of the first moving block 18. A second spring 23 is provided in the second sliding groove 25. A second piston rod 24 is also provided in the second sliding groove 25. One end of the second piston rod 24 is connected to the surface of the second moving block 27, and the other end is connected to a driving device. The driving device drives the second piston rod 24 to move. 7. As the second piston rod 24 moves, one end of the second spring 23 is connected to the surface of the second moving block 27, and the other end is connected to the inner wall of the second slide groove 25. When the rotating shaft 21 moves, the rotating shaft 21 approaches the cleaning rod 20. The cleaning brush 22 on the surface of the rotating shaft 21 can be stuck between the cleaning rods 20. After the cleaning brush 22 rotates with the rotating shaft 21, it continuously passes between the cleaning rods 20. The second spring 23 and the first spring 17 have elastic force, so that the first moving block 18 and the second moving block 27 are both close to the direction of the cable 2, so that the two sets of rotating shafts 21 are held against both sides of the cable 2.

[0035] The take-up roller 3 rotates, causing the cable 2 to wind around its surface. The cable 2 passes through the interior of the top plate 9 and the side plate 10. The screw 7 can rotate to move the top plate 9 and the side plate 10, causing the cable 2 to move laterally with the top plate 9 and the side plate 10, so that the cable 2 is evenly wound around the surface of the take-up roller 3. The top plate 9 and the side plate 10 are equipped with a rotating shaft 21. The surface of the rotating shaft 21 is equipped with a cleaning brush 22. The rotating shaft 21 can rotate. Two sets of rotating shafts 21 are located on both sides of the cable 2. After the cleaning brush 22 rotates with the rotating shaft 21, it cleans the surface of the cable 2. The top and bottom of the rotating shaft 21 are connected to the second spring 23 and the first spring 17. The first spring 17 and the second spring 23 hold the two sets of rotating shafts 21 against the surface of the cable 2 to clean the surface of the cable 2. Debris on the surface of the cleaning rod 20 falls off. The bottom of the top plate 9 and the side plate 10 is provided with a discharge chute 28, so that the debris can fall from the discharge chute 28.

[0036] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A marine winch having a cable self-cleaning mechanism, characterised in that: Include: The utility model provides a fixed plate (1), the surface of fixed plate (1) is fixed with extension plate (4), the surface of fixed plate (1) is provided with limit rod (6), the outside of limit rod (6) is provided with sleeve board (5), the surface of sleeve board (5) is fixed with top plate (9) and side plate (10), the inside of top plate (9) and side plate (10) is provided with pivot (21), the surface of pivot (21) is fixed with cleaning brush (22), the inside of side plate (10) is provided with cleaning rod (20), the other end of cleaning rod (20) is connected with connecting plate (33), the surface of side plate (10) is provided with clamping groove (32), the surface of connecting plate (33) is fixed with first L rod (11) and second L rod (13), the other end of connecting plate (33) is fixed with third L rod (29) and fourth L rod (31), the inside of side plate (10) is fixed with extension block (26), the surface of extension block (26) is provided with second sliding slot (25), second sliding slot (25) is inserted with second moving block (27), second moving block (27) can move in second sliding slot (25), second moving block (27) is inserted with pivot (21), and the top of pivot (21) is inserted in the bottom of first moving block (18), second sliding slot (25) is provided with second spring (23), second sliding slot (25) is provided with second piston rod (24), one end of second piston rod (24) is connected with the surface of second moving block (27), the other end is connected with drive equipment, drive equipment moves second piston rod (24), second moving block (27) moves along with second piston rod (24), one end of second spring (23) is connected with the surface of second moving block (27), and the other end is connected with the inner wall of second sliding slot (25), when first L rod (11) and second L rod (13) and third L rod (29) and fourth L rod (31) move along with sleeve board (5), the end of first L rod (11) and second L rod (13) and third L rod (29) and fourth L rod (31) can be held on the surface of fixed plate (1) and extension plate (4), so that first L rod (11) and second L rod (13) and third L rod (29) and fourth L rod (31) move, because the other end of first L rod (11) and second L rod (13) and third L rod (29) and fourth L rod (31) is connected with connecting plate (33), make connecting plate (33) move, connecting plate (33) drives cleaning rod (20) to move, the surface of top plate (9) is provided with first sliding slot (14), first sliding slot (14) is provided with first piston rod (15), first sliding slot (14) is inserted with first moving block (18), the surface of first moving block (18) is provided with limit board, the surface of top plate (9) is provided with limit slot (16), and the limit board of first moving block (18) surface is inserted in limit slot (16), first moving block (18) can move in first sliding slot (14), the limit board of first moving block (18) surface can move in limit slot (16),The surface of the first moving block (18) is fixed with a second motor (19), the second motor (19) moves with the first moving block (18), one end of the first piston rod (15) is connected with the surface of the first moving block (18), the other end is connected with a driving device, the driving device can drive the first piston rod (15) to move in the first sliding groove (14), the first piston rod (15) drives the first moving block (18) to move, the first sliding groove (14) is provided with a first spring (17), the first spring (17) is located outside the first piston rod (15), one end of the first spring (17) is connected with the surface of the first moving block (18), the other end is connected with the inner wall of the first sliding groove (14).

2. A marine winch having a cable self-cleaning mechanism as claimed in claim 1, wherein: The inside of the top plate (9) and the side plate (10) passes through the cable (2), the cable (2) can move inside the top plate (9) and the side plate (10), one side of the fixed plate (1) is provided with a winding roller (3), the cable (2) is wound on the surface of the winding roller (3), the fixed plate (1) is provided with two groups, the surface of the fixed plate (1) is fixed with two groups of limiting rods (6), the surface of the fixed plate (1) is provided with a lead screw (7), the lead screw (7) can rotate between the two groups of fixed plates (1), the surface of the fixed plate (1) is provided with a first motor (8), the first motor (8) can drive the lead screw (7) to rotate, the lead screw (7) passes through the inside of the sleeve plate (5), the sleeve plate (5) is driven to move after the lead screw (7) rotates, the sleeve plate (5) can move on the surface of the limiting rod (6).

3. A marine winch having a cable self-cleaning mechanism as claimed in claim 2, wherein: The inside of the side plate (10) is inserted with a cleaning rod (20), the cleaning rod (20) can move inside the side plate (10), the other end of the cleaning rod (20) is connected with a connecting plate (33), the cleaning rod (20) moves with the connecting plate (33), the surface of the side plate (10) is provided with a clamping groove (32), the connecting plate (33) can be inserted into the clamping groove (32), the second motor (19) can drive the rotating shaft (21) to rotate, the surface of the rotating shaft (21) is fixed with a plurality of cleaning brushes (22), the cleaning brushes (22) rotate with the rotating shaft (21), the cable (2) is located between the two rotating shafts (21).

4. A marine winch having a cable self-cleaning mechanism as claimed in claim 3, wherein: The bottom of the sleeve plate (5) is provided with a blanking groove (28), the blanking groove (28) is provided with two groups, the surface of the first L rod (11) is provided with a first through hole (12), the second L rod (13) is inserted into the first L rod (11) on the surface of the first L rod (11), the second L rod (13) can move in the first through hole (12), the surface of the third L rod (29) is provided with a second through hole (30), the fourth L rod (31) is inserted into the second through hole (30), the fourth L rod (31) can move in the second through hole (30).

5. A marine winch having a cable self-cleaning mechanism as claimed in claim 4, wherein: The cleaning brush (22) rotates with the rotating shaft (21), the surface of the cleaning brush (22) will contact the surface of the cable (2) when the cleaning brush (22) rotates, and the surface of the cable (2) is cleaned by the cleaning brush (22).

6. A marine winch having a cable self-cleaning mechanism as claimed in claim 5, wherein: When the rotating shaft (21) moves, the rotating shaft (21) is close to the cleaning rod (20), the cleaning brushes (22) on the surface of the rotating shaft (21) can be clamped between the cleaning rods (20), and the cleaning brushes (22) continuously pass between the cleaning rods (20) after the rotating shaft (21) rotates.

7. A marine winch having a cable self-cleaning mechanism as claimed in claim 6, wherein: The second spring (23) and the first spring (17) have elasticity, so that the first moving block (18) and the second moving block (27) are close to the direction of the cable (2), so that the two rotating shafts (21) are supported on both sides of the cable (2).

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