A winch for laying power transmission lines

Abstract

This application relates to the field of winch technology and discloses a winch for laying power transmission lines. It mainly consists of a base, a diesel engine, a gearbox, a support, and a drum wheel. A wedge-shaped groove is formed on the inner side of the support, and an installation groove is formed on the drum wheel baffle. A first return spring and a slider are installed in the installation groove. The drum wheel winding roller is horizontal. A support bearing and a rotating ring are located at the center of the support. A shaft hole I is formed on the rotating ring. Grooves are formed on the baffle and winding roller, and rollers and a conveyor belt are installed in the grooves. The conveyor belt has threads. A fixed shaft is located inside the support bearing and the sealing bearing. The fixed shaft has threads in the middle. The distribution shaft of the transmission shaft is inserted into the drum wheel and has a connecting hole connecting the installation groove and the sealing space. An auxiliary groove is formed inside the baffle, and a second return spring and a brake block are installed in the auxiliary groove. A brake groove is formed on the fixed shaft. This invention has the advantages of preventing the traction rope from driving the drum wheel to reverse and avoiding slippage and wear of the traction rope on the drum wheel.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of winches, in particular to a winch for power transmission line laying. BACKGROUND

[0002] The winch is short for motorized winch, also known as motorized winch, and is a necessary construction equipment for tight line and pole erection when erecting overhead cables or underground wiring, and can smoothly and conveniently erect the conductor hoist, traction or tight line in various complex environments. The winch is composed of a drum wheel, a gearbox, a diesel engine or a gasoline engine and a base frame. The working principle of the winch is that the traction rope or steel wire rope is directly wound on the drum wheel, the gasoline engine or the diesel engine is used as power, and the required rotating speed is achieved through the speed change of the gearbox. The whole machine is placed on the base frame, which is stable and convenient to move.

[0003] The drum wheel of the existing winch is in the shape of thin in the middle and thick at both ends. Before use, the traction rope needs to be pre-wound several turns on the drum wheel. When the diesel engine drives the drum wheel to pull the traction rope to rotate, the traction rope on the outer circle of the drum wheel slides to the smallest inner diameter of the drum wheel. Since the traction rope is subjected to a large tension when pulling the object, a large friction force is generated when the traction rope and the drum wheel slide relative to each other, resulting in serious wear of the traction rope. When pulling heavy objects, the traction rope may break, causing safety accidents. In addition, when the winch pulls heavy objects, it is difficult to accurately calculate the weight of the heavy objects, and overloading or sudden stress of the pulled object may occur. At this time, the pulled object may drive the traction rope and the drum wheel to rotate in the opposite direction, causing the pulled object to fall and causing safety accidents. SUMMARY

[0004] The application provides a winch for power transmission line laying, which has the advantages of preventing the traction rope from driving the drum wheel to reverse rotation and avoiding the traction rope from sliding and wearing on the drum wheel, so as to solve the problems of reverse rotation of the winch or the pulled object due to overloading or sudden stress and serious sliding and wearing of the traction rope on the drum wheel.

[0005] To achieve the above-mentioned purpose, the application adopts the following technical scheme: a winch for power transmission line laying, comprising a base, a diesel engine, a gearbox, a support and a drum wheel, wherein the base top end is sequentially provided with the diesel engine, the gearbox, the support and the drum wheel, the gearbox is fixedly connected with a transmission shaft, the inner side surface of the support is annularly arrayed with a plurality of wedge-shaped grooves, the drum wheel comprises a baffle and a winding roller, the baffle of the drum wheel is tightly attached to the side surface of the support and annularly arrayed with a mounting groove, the first reset spring is fixedly installed in the mounting groove, the top end of the first reset spring is fixedly installed with a sliding block, the sliding block is slidingly installed in the mounting groove, and one end of the sliding block extending out of the mounting groove is slidingly installed in the wedge-shaped groove.

[0006] Further, the side wall of the winding roller is horizontally arranged, two support bearings with different sizes are arranged in the mounting hole of the support, a rotating ring is fixedly arranged between the two support bearings, shaft holes I are arranged in the rotating ring in an annular array, hinged grooves are arranged in the inner wall of the baffle in an annular array, rollers are arranged in the hinged grooves, sliding grooves are arranged in the winding roller in an annular array, a conveying belt is movably arranged on the rollers in the baffle on both sides, the conveying belt is arranged in the sliding groove, threads are arranged on the outer side of the conveying belt, shaft holes II are arranged in the axial direction of the baffle and the winding roller, a sealing bearing is fixedly arranged on the inner wall of the baffle, a fixed shaft is fixedly arranged on the inner ring of the sealing bearing and the inner ring of the smaller support bearing, a support rod is fixedly arranged on the outer side of the support away from the gearbox, one end of the fixed shaft is fixedly arranged on the support rod, the middle part of the fixed shaft is threaded, the threaded part is in threaded transmission with the conveying belt, one end of the transmission shaft is arranged as a plurality of dispersed shafts arranged in an annular array, and the dispersed shafts are inserted into the shaft holes I and the shaft holes II.

[0007] Further, the conveying belt, the side wall of the mounting groove and the side wall of the sliding groove form a sealed space, a communication hole is arranged in the baffle and the winding roller, the communication hole communicates the mounting groove and the sealed space, and a one-way valve is arranged at the connection between the communication hole and the mounting groove.

[0008] Further, the number of the mounting grooves is an integer multiple of the number of the wedge grooves.

[0009] Further, the thread pitch of the threads on the conveying belt and the thread pitch of the threaded part of the fixed shaft are the same as the diameter of the traction rope.

[0010] Further, an auxiliary groove is arranged in the baffle away from the gearbox, the auxiliary groove is located at the bottom end of the mounting groove, a second return spring is fixedly arranged on the side wall of the auxiliary groove away from the fixed shaft, a brake block is fixedly arranged at the bottom end of the second return spring, the brake block is arranged in a T shape, the horizontal rod end of the brake block is in contact with the conveying belt, the conveying belt rotates to move the brake block to slide in the radial direction of the baffle, a plurality of brake grooves are arranged in an annular array on the side wall of the fixed shaft, and the brake grooves are on the same vertical plane as the brake block.

[0011] Further, the vertical rod of the brake block is arranged in a circular truncated cone shape with a gradually decreasing diameter from top to bottom.

[0012] 1. The winch for power transmission line laying provided by the application comprises two supports, a baffle plate, a roller, a transmission shaft, a rotating ring, a roller wheel, a first reset spring, a sliding block and a traction rope, wherein the inner side of the baffle plate is provided with a wedge-shaped slot, the outer side of the baffle plate is provided with a plurality of installation slots, the first reset spring is fixedly installed in the installation slot, the top end of the first reset spring is fixedly provided with the sliding block, and the sliding block is slidably installed in the installation slot and the wedge-shaped slot.

[0013] 2. The winch for power transmission line laying provided by the application comprises a roller, a baffle plate, a transmission shaft, a rotating ring, a roller wheel, a first reset spring, a sliding block and a traction rope, wherein the roller is horizontally arranged, the inner side of the baffle plate is provided with a hinged slot, the hinged slot is provided with a roller, the roller is provided with a sliding groove, the transmission belt is movably sleeved on the rollers, the transmission belt is located in the sliding groove, the outer surface of the transmission belt is threaded, the mounting hole of the support is provided with two supporting bearings, the two supporting bearings are provided with a rotating ring, the rotating ring is provided with an axial hole I, the axial direction of the baffle plate and the roller is provided with an axial hole II, the dispersion shaft of the transmission shaft is fixedly sleeved in the axial hole I and the axial hole II, the supporting bearing on the inner side of the support is movably sleeved with a fixed shaft, the side of the support away from the gearbox is fixedly provided with a supporting rod, one end of the fixed shaft is fixedly installed on the supporting rod, the middle part of the fixed shaft is threaded, and the threaded part of the fixed shaft is in threaded transmission with the transmission belt.

[0014] 3. The winch for power transmission line laying provided by the application comprises a baffle plate, a roller, a transmission shaft, a rotating ring, a roller wheel, a first reset spring, a sliding block and a traction rope, wherein the baffle plate and the roller are provided with a communication hole, the communication hole communicates the installation slot and the sealed space, and the connection between the communication hole and the installation slot is provided with a one-way valve, so that when the first reset spring axially slides in the installation slot, the compressed gas in the installation slot is introduced into the sealed space to supplement the gas in the sealed space.

[0015] 4. The power transmission line laying winch provided by the application has the advantages that the auxiliary groove is arranged in the inner side of the hinged groove, the second reset spring and the brake block are arranged in the auxiliary groove, the fixing shaft side wall is arrayed with a plurality of brake grooves, when the traction rope is suddenly stressed or overloaded and reverses, the drum wheel reverses simultaneously, the conveying belt reverses, the screw thread of the conveying belt drives the brake block to slide to the fixing shaft, the brake block is inserted into the brake groove, the fixing shaft prevents the drum wheel from rotating, and the braking effect when the drum wheel reverses is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of the specification, illustrate the embodiments of the present application and serve to explain the principles of the present application.

[0017] The present disclosure can be understood moreappreciably by the following detailed description when taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a structural schematic diagram of the present application;

[0019] Figure 2 is an internal structure schematic diagram of the drum wheel device of the first embodiment of the present application;

[0020] Figure 3 is a support structure schematic diagram of the first embodiment of the present application;

[0021] Figure 4 is an internal structure schematic diagram of the drum wheel device of the second embodiment of the present application;

[0022] Figure 5 is a support structure schematic diagram of the second embodiment of the present application;

[0023] Figure 6 is a structure sectional view of A-A in the present application; Figure 4

[0024] Figure 7 is a structure sectional view of B-B in the present application; Figure 4

[0025] Figure 8 is an internal structure schematic diagram of the drum wheel device of the third embodiment of the present application.

[0026] ​​In the figure: 1, base; 2, diesel engine; 3, gearbox; 4, support; 401, mounting hole; 402, support bearing; 403, wedge-shaped groove; 404, rotating ring; 405, shaft hole I; 5, drum wheel; 501, baffle; 502, winding roller; 503, mounting groove; 504, first return spring; 505, sliding block; 506, hinged groove; 507, roller; 508, sliding groove; 509, conveyor belt; 510, shaft hole II; 511, communication hole; 512, sealing bearing; 513, sealing space; 514, auxiliary groove; 515, second return spring; 516, brake block; 6, transmission shaft; 601, dispersion shaft; 7, fixed shaft; 701, brake groove; 8, support rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0028] Embodiment one: please refer to Figure 1 , Figure 2 and Figure 3 , a winch for power transmission line laying, comprising a base 1, a diesel engine 2, a gearbox 3, a support 4 and a drum wheel 5, the diesel engine 2 is fixedly installed on one side of the top end of the base 1, the gearbox 3 is fixedly installed close to the side surface of the diesel engine 2, the diesel engine 2 is connected with the gearbox 3 through a connecting shaft, two supports 4 are fixedly installed close to the side surface of the gearbox 3, the mounting hole 401 is formed in the center position of the support 4, the support bearing 402 is fixedly sleeved in the mounting hole 401, the inner ring of the support bearing 402 on both sides is fixedly sleeved on both ends of the transmission shaft 6, the transmission shaft 6 is fixedly connected with the gearbox 3 through the transmission shaft 6, the drum wheel 5 is fixedly sleeved on the transmission shaft 6 at the middle position of the two supports 4, the drum wheel 5 comprises a baffle 501 and a winding roller 502.

[0029] A plurality of wedge-shaped grooves 403 are annularly formed on the inner side surface of the support 4, a single wedge-shaped groove 403 is a low-to-high inclined surface in clockwise or counterclockwise direction, the high end of the inclined surface is coplanar with the surface of the support 4, the mounting groove 503 is annularly formed close to the side surface of the support 4 of the baffle 501 of the drum wheel 5, the first return spring 504 is fixedly installed in the mounting groove 503, the top end of the first return spring 504 is fixedly installed with the sliding block 505, the sliding block 505 is slidingly installed in the mounting groove 503, and one end of the sliding block 505 extending out of the mounting groove 503 is slidingly installed in the wedge-shaped groove 403.

[0030] When rotating forward, the slider 505 slides from the deepest part of the wedge-shaped groove 403 to the shallowest part of the wedge-shaped groove 403, and when rotating reversely, the slider 505 slides from the shallowest part of the wedge-shaped groove 403 to the deepest part of the wedge-shaped groove 403, so that the wall of the deepest part of the wedge-shaped groove 403 blocks the sliding of the slider 505.

[0031] The working principle of the embodiment one of the present application is as follows:

[0032] Please refer to Figure 1 、 Figure 2 and Figure 3 Before the winching machine works, several turns of the traction rope need to be pre-wound on the drum wheel 5. When working, the diesel engine 2 is started, and the diesel engine 2 drives the transmission shaft 6 and the drum wheel 5 to rotate through the gearbox 3. When the drum wheel 5 rotates forward to wind the traction rope, the slider 505 of the drum wheel 5 slides in the wedge-shaped groove 403, and the slider 505 slides from the deepest part of the wedge-shaped groove 403 to the shallowest part of the wedge-shaped groove 403, and then the slider 505 enters the deepest part of the next wedge-shaped groove 403 again, and the sliding is repeated in this way. When the traction object on the traction rope is suddenly forced or the winching machine is overloaded, the traction object drives the traction rope and the drum wheel 5 to rotate reversely, the slider 505 of the drum wheel 5 slides from the shallowest part of the wedge-shaped groove 403 to the deepest part of the wedge-shaped groove 403, so that the wall of the deepest part of the wedge-shaped groove 403 blocks the sliding of the slider 505, and the slider 505 blocks the rotation of the whole drum wheel 5 at the same time, which avoids the traction object from falling off due to the reverse rotation of the drum wheel 5, and causes the occurrence of safety accidents.

[0033] Embodiment two: different from the embodiment one, please refer to Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7The side wall of the drum wheel 5 winding roller 502 is horizontally arranged, two support bearings 402 with different sizes are arranged in the mounting hole 401 of the support 4, the rotating ring 404 is fixedly arranged between the two support bearings 402, the shaft hole I 405 is arranged in the rotating ring 404 in an annular array, the inner wall of the baffle 501 of the drum wheel 5 is arranged in an annular array, the hinge groove 506 is arranged in the inner wall of the hinge groove 506, the roller 507 is arranged in the hinge groove 506, the roller 507 is hinged to the inner wall of the hinge groove 506, the sliding groove 508 is arranged in the winding roller 502 of the drum wheel 5 in an annular array, the sliding groove 508 corresponds to the hinge groove 506 one by one, the roller 507 in the baffle 501 on the two sides is movably sleeved with the conveying belt 509, the conveying belt 509 is arranged in the sliding groove 508, the outer side of the conveying belt 509 is provided with a thread, the baffle 501 of the drum wheel 5 and the axial direction of the winding roller 502 are provided with the shaft hole II 510, the shaft hole II 510 corresponds to the position of the shaft hole I 405, the inner wall of the baffle 501 of the drum wheel 5 is fixedly provided with the sealing bearing 512, the inner ring of the sealing bearing 512 and the inner ring of the smaller support bearing 402 are fixedly sleeved with the fixed shaft 7, the outer side of the support 4 away from the gearbox 3 is fixedly provided with the support rod 8, one end of the fixed shaft 7 is fixedly arranged on the support rod 8, the middle part of the fixed shaft 7 is threaded, the threaded part is in threaded transmission with the conveying belt 509, one end of the transmission shaft 6 is provided with the dispersed shaft 601 arranged in an annular array, the dispersed shaft 601 is inserted into the shaft hole I 405 and the shaft hole II 510.

[0034] The conveying belt 509, the side wall of the mounting groove 503 and the side wall of the sliding groove 508 form a sealed space 513, the baffle 501 and the winding roller 502 are provided with a communication hole 511, the communication hole 511 communicates the mounting groove 503 and the sealed space 513, and the connection part of the communication hole 511 and the mounting groove 503 is provided with a one-way valve.

[0035] The number of the mounting grooves 503 is an integer multiple of the number of the wedge grooves 403. When the sliding block 505 in the mounting groove 503 pushes the wedge groove 403 to slide, the elastic force of the first return spring 504 in the mounting groove 503 always acts in the axial direction of the transmission shaft 6, so that the drum wheel 5 is prevented from being inclined due to unbalanced elastic force, and unbalanced wear between the inner wall of the drum wheel 5 and the fixed shaft 7 is prevented.

[0036] The thread pitch of the thread on the conveying belt 509 and the thread pitch of the threaded part of the fixed shaft 7 are the same as the diameter length of the traction rope. The sliding distance of the conveying belt 509 around the fixed shaft 7 is the same as the length of the diameter of the traction rope, so that the traction rope on the drum wheel 5 always remains in the same position of the drum wheel 5.

[0037] Because the side wall of the conveying belt 509 will slide and rub against the side wall of the winding roller 502 during use, a lubricant needs to be added to the contact part of the conveying belt 509 and the winding roller 502 before use to reduce the wear of the side wall of the conveying belt 509.

[0038] The working principle of the second embodiment of the present application is as follows:

[0039] Please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , before the winch operation, a few turns of the traction rope need to be pre-wound on the drum wheel 5. During the operation, the diesel engine 2 is started, and the diesel engine 2 drives the transmission shaft 6 and the drum wheel 5 to rotate through the gearbox 3. The drum wheel 5 rotates to wind the traction rope. At the same time, the drum wheel 5 rotates, and the transmission belt 509 on the drum wheel 5 is in threaded transmission with the fixed shaft 7. The fixed shaft 7 is fixed and does not move. When the transmission belt 509 rotates around the fixed shaft 7, the threads on the fixed shaft 7 make the transmission belt 509 slide in the axial direction of the drum wheel 5, that is, the transmission belt 509 slides around the two side rollers 507. At this time, the transmission belt 509 drives the traction rope wound outside the transmission belt 509 to slide in the axial direction of the drum wheel 5. The synchronous sliding of the transmission belt 509 and the traction rope replaces the original sliding of the traction rope on the winding roller 502, avoiding the sliding friction between the traction rope and the winding roller 502, thereby avoiding the breakage of the traction rope due to severe wear and causing safety accidents.

[0040] At the same time that the drum wheel 5 rotates, the sliding block 505 slides in the axial direction in the mounting groove 503. The sliding block 505 extrudes the air in the mounting groove 503, so that the high-pressure air in the mounting groove 503 enters the sealed space 513 through the communication hole 511. The sealed space 513 is continuously filled with air, ensuring that there is a gap between the upper and lower transmission belts 509 on the roller 507, so that the outer transmission belt 509 does not tightly adhere to the inner transmission belt 509 due to the pressure of the traction rope, thereby preventing the upper and lower transmission belts 509 on the roller 507 from rubbing when rotating around the roller 507, thereby prolonging the service life of the transmission belt 509.

[0041] Embodiment three: different from embodiment two, please refer to Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , the baffle 501 away from the gearbox 3 is provided with an auxiliary groove 514 at the bottom end of the mounting groove 503. The second return spring 515 is fixedly installed on the side wall away from the fixed shaft 7 in the auxiliary groove 514. The bottom end of the second return spring 515 is fixedly installed with a brake block 516. The brake block 516 is in the shape of T. The horizontal rod end of the brake block 516 is in contact with the transmission belt 509. The transmission belt 509 will move the brake block 516 to slide in the radial direction of the baffle 501. A plurality of brake grooves 701 are arranged in an annular array on the side wall of the fixed shaft 7. The brake grooves 701 are on the same vertical plane as the brake block 516.

[0042] The brake block 516 vertical rod is provided with circular table shape from top to bottom, and the diameter is gradually reduced. Even if the brake block 516 slightly shakes, the brake block 516 can be inserted into the brake groove 701 of the fixed shaft 7.

[0043] The working principle of the third embodiment of the present application is as follows:

[0044] Please refer to Figure 1 、 Figure 5 、 Figure 6 、 Figure 7 And Figure 8 , before the winch operation, the traction rope needs to be pre-wound several turns on the drum wheel 5. During the operation, the diesel engine 2 is started, and the diesel engine 2 drives the transmission shaft 6 and the drum wheel 5 to rotate through the gearbox 3. The drum wheel 5 rotates in the forward direction to wind the traction rope. At the same time, the transmission belt 509 rotates around the roller 507. When the transmission belt 509 rotates in the forward direction, the outer thread of the transmission belt 509 drives the cross rod of the brake block 516 to move away from the fixed shaft 7. When the traction object on the traction rope is suddenly forced or the winch is overloaded, the traction object drives the traction rope and the drum wheel 5 to reverse. The transmission belt 509 reverses, and the outer thread of the transmission belt 509 drives the cross rod of the brake block 516 to move towards the center of the fixed shaft 7. The brake block 516 is inserted into the brake groove 701, so that the brake block 516 is fixed relative to the fixed shaft 7. The brake block 516 hinders the drum wheel 5 from continuing to rotate. When the drum wheel 5 reverses, the auxiliary brake achieves the purpose.

Claims

1. A winch for power line laying, comprising a base (1), a diesel engine (2), a gearbox (3), a support (4) and a drum wheel (5), the top end of the base (1) is sequentially provided with the diesel engine (2), the gearbox (3), the support (4) and the drum wheel (5) from left to right, and the gearbox (3) is fixedly connected with a transmission shaft (6), characterized in that: The inner side surface annular array of the support (4) is provided with a plurality of wedge-shaped grooves (403), the drum wheel (5) comprises a baffle (501) and a winding roller (502), the baffle (501) of the drum wheel (5) is tightly attached to the side surface annular array of the support (4) and is provided with a mounting groove (503), a first return spring (504) is fixedly installed in the mounting groove (503), a sliding block (505) is fixedly installed at the top end of the first return spring (504), the sliding block (505) is slidingly installed in the mounting groove (503), and one end of the sliding block (505) extending out of the mounting groove (503) is slidingly installed in the wedge-shaped groove (403); The side wall of the winding roller (502) is horizontally arranged, two support bearings (402) with different sizes are arranged in the mounting hole (401) of the support (4), a rotating ring (404) is fixedly installed between the two support bearings (402), an axle hole I (405) is annularly arranged on the rotating ring (404), a hinged groove (506) is annularly arranged on the inner wall of the baffle (501), a roller (507) is arranged in the hinged groove (506), a sliding groove (508) is annularly arranged on the winding roller (502), a conveyor belt (509) is movably sleeved on the rollers (507) in the baffles (501) on both sides, the conveyor belt (509) is arranged in the sliding groove (508), a thread is arranged on the outer side surface of the conveyor belt (509), an axle hole II (510) is arranged in the axial direction of the baffle (501) and the winding roller (502), a sealing bearing (512) is fixedly arranged on the inner wall of the baffle (501), a fixed shaft (7) is fixedly sleeved on the inner ring of the sealing bearing (512) and the inner ring of the smaller support bearing (402), a support rod (8) is fixedly installed on the outer side of the support (4) away from the gearbox (3), one end of the fixed shaft (7) is fixedly installed on the support rod (8), the middle part of the fixed shaft (7) is threaded, the threaded part is in threaded transmission with the conveyor belt (509), and one end of the transmission shaft (6) is arranged as a dispersed shaft (601) arranged in an annular array.

2. A cable line laying winch according to claim 1, characterized in that The conveyor belt (509), the side wall of the mounting groove (503) and the side wall of the sliding groove (508) form a sealed space (513), a communication hole (511) is arranged in the baffle (501) and the winding roller (502), the communication hole (511) communicates the mounting groove (503) and the sealed space (513), and a one-way valve is arranged at the connection between the communication hole (511) and the mounting groove (503).

3. A winch for stringing a power line according to claim 1, characterized in that The number of the mounting grooves (503) is an integer multiple of the number of the wedge-shaped grooves (403).

4. A winch for stringing a power line according to claim 1, characterized in that The thread pitch of the thread on the conveyor belt (509) and the thread pitch of the threaded part of the fixed shaft (7) are the same as the diameter length of the traction rope.

5. A winch for stringing a power line according to claim 1, characterized in that The baffle (501) away from the gearbox (3) is provided with an auxiliary groove (514) at the bottom end of the mounting groove (503), a second return spring (515) is fixedly installed on the side wall away from the fixed shaft (7) in the auxiliary groove (514), the bottom end of the second return spring (515) is fixedly installed with a brake block (516), the brake block (516) is in T-shaped, the horizontal rod end of the brake block (516) is in contact with a transmission belt (509), the transmission belt (509) rotates to drive the brake block (516) to slide in the radial direction of the baffle (501), and a plurality of brake grooves (701) are arranged in an annular array on the side wall of the fixed shaft (7).

6. A line stringing winch according to claim 5, characterised in that The vertical rod of the brake block (516) is in the shape of a circular truncated cone with a gradually reduced diameter from top to bottom.

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