Automatic cleaning and scraping mechanism for pigsty

By adopting a sliding and rotating composite connection structure and spring adjustment of the scraping floor pressure in the pigpen manure cleaning scraper mechanism, combined with a winch transmission system, the overload problem of traditional pigpen manure cleaning scraper mechanisms when manure accumulates and the ground is uneven is solved, thereby improving the degree of automation and cleaning effect.

CN224936324UActive Publication Date: 2026-11-06ENTER QIANSHI (CHONGQING) PIG FARM
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202522677895.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-12-17
Publication Date
2026-11-06
Estimated Expiration
2035-12-17

AI Technical Summary

Technical Problem

Traditional pigpen manure cleaning scraper mechanisms are prone to overload and stoppage of the drive motor when faced with manure accumulation or uneven ground, resulting in damage to the transmission mechanism, low automation, incomplete cleaning, and lack of overload protection and adaptive adjustment capabilities.

Method used

The scraper, which adopts a sliding and rotating composite connection structure, adjusts the pressure between the scraper and the ground through the pressure plate spring between the spring sleeve and the spring seat tube. Combined with the winch and ratchet transmission system, it achieves overload protection and adaptive adjustment, ensuring good contact between the scraper and the ground.

Benefits of technology

It achieves overload protection for the scraper when facing fecal accumulation, avoids motor stalling and transmission mechanism damage, improves the degree of automation and the stability of cleaning effect, adapts to uneven ground, and ensures thorough cleaning and equipment reliability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224936324U_ABST
    Figure CN224936324U_ABST
Patent Text Reader

Abstract

This utility model discloses an automatic manure removal scraper mechanism for pig pens, relating to the field of pig pen manure removal technology. The utility model includes a conveying frame, a scraper plate, and a pushing beam. The conveying frame is equipped with a sliding rod guiding system, and the scraper plate is connected to the pushing beam via a spring mechanism. The transmission system uses a combination of a winch and a ratchet to achieve unidirectional drive. This utility model, through elastic pressure adjustment and overload protection mechanisms, enables the scraper to adapt to ground conditions and automatically lift when resistance is excessive, effectively solving the problems of easy overload damage and incomplete cleaning in traditional manure removal mechanisms. This mechanism has the advantages of stable operation, thorough cleaning, and high reliability, realizing the automation and high efficiency of pig pen manure removal operations, and is particularly suitable for the cleaning needs of large-scale farms.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the field of pig pen manure cleaning technology, and in particular relates to an automatic pig pen manure cleaning scraper mechanism. Background Technology

[0002] In large-scale pig farming, cleaning manure from pigpen floors is a crucial step in maintaining a hygienic environment. Traditional manure-cleaning scraper mechanisms often use rigid connections, resulting in a fixed contact pressure between the scraper and the ground. When manure accumulates too thickly or is mixed with bedding or other foreign matter, the scraper is easily obstructed, causing the drive motor to overload and stop, and even damaging the transmission mechanism. Operators need to frequently stop the machine for manual cleaning or adjustments, resulting in low automation and work efficiency. In addition, pigpen floors are often uneven, making it difficult for rigid scrapers to fully adhere to the ground, leading to incomplete cleaning or leaving residue. Existing equipment lacks effective overload protection mechanisms and adaptive adjustment capabilities, which restricts the stability of cleaning effects and the reliability of equipment operation.

[0003] To address these issues, we provide an automatic manure removal scraper mechanism for pig pens. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic manure removal scraper mechanism for pig pens. This mechanism involves slidingly connecting the two ends of a push beam to slide rods below the side rails of a conveying frame. A shaft tube is rotatably fitted inside a fixed bushing on the lower end face of the push beam. A set of spring sleeves is axially arrayed and fixed on one side wall of the shaft tube. A fixed shaft tube is fixed at the other end of the conveying frame. A rotating tube at one end of the scraper is fitted onto the outside of the fixed shaft tube. A spring seat tube is rotatably installed on one side of the scraper. Spring seats on one side of the spring seat tube are respectively fitted into each spring sleeve. A pressure plate spring is installed inside the spring seat. The two side rails of the conveying frame are then... The scraper is attached to the side walls of the pigpen manure trough. When cleaning the manure, the push beam moves the conveyor frame along the trough. At the same time, the push beam pushes the shaft tube, causing the pressure plate spring to press against the scraper floor. This causes the lower end of the scraper floor to contact the ground of the manure trough, and the scraper floor moves the pig manure on the ground. When there is too much pig manure on one side of the scraper floor, the push beam is pushed further, increasing the pressure of the scraper floor on the pressure plate spring. This squeezes the pressure plate spring, causing the scraper floor to lift under the action of the pig manure, thus leaving some of the pig manure in the manure trough. This prevents the motor driving the push beam from being overloaded, and also prevents the scraper floor and conveyor frame from being damaged due to overload.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to an automatic manure removal scraper mechanism for pig pens, comprising a conveying frame, a scraping plate, and a pushing beam. The conveying frame has an H-shaped structure. A sliding rod is fixedly installed below the frame bars on both sides of the conveying frame. A shaft sleeve is fixedly installed at both ends of the lower side of the pushing beam. A shaft tube is rotatably sleeved inside the shaft sleeve at both ends. The two ends of the shaft tube are slidably sleeved on the outside of the sliding rod. A set of spring sleeves is axially arranged and fixed on one side of the outer wall of the shaft tube. A rotating tube is fixedly installed on the upper end face of the scraping plate. A fixed shaft tube is rotatably sleeved inside the rotating tube. The two ends of the fixed shaft tube are fixedly installed at the ends of the two sliding rods away from the pushing beam. A transition ear is fixedly installed on both sides of the scraping plate surface near the pushing beam. A spring seat tube is rotatably installed between the two transition ears. A set of spring seats is axially arranged and fixed on one side of the outer wall of the spring seat tube. Each spring seat is sleeved in the spring sleeve. A pressure plate spring is sleeved inside the spring seat. The two ends of the pressure plate spring are fixedly connected to the end face of the spring seat and the end face of the spring sleeve, respectively.

[0007] A further feature of this invention is that limiting sleeves are fixedly provided on the lower side of the two side frames of the conveying frame away from the fixed shaft tube, and the limiting sleeves are fixedly sleeved on the outside of the slide rod. The two ends of the shaft tube are respectively sleeved on the side of the limiting sleeves away from the fixed shaft tube.

[0008] A further feature of this invention is that a slide rail square tube is provided on both sides of the conveying frame. The length direction of the slide rail square tube is parallel to the axis of the slide rod. A cantilever groove is provided through the middle section of the lower side wall of the slide rail square tube. A roller is sleeved inside the slide rail square tube. The axle of the roller is rotated and sleeved with a cantilever. The cantilever is sleeved in the cantilever groove. The two cantilevers are respectively fixedly installed on the outer side of the frame bars on both sides of the conveying frame.

[0009] A further feature of this invention is that a wheel seat fixing plate is fixedly connected between the two slide rail square tubes. The two ends of the wheel seat fixing plate are respectively fixedly connected to one end of the slide rail square tube. Two wheel seats are fixedly installed on the surface of the wheel seat fixing plate. A cable winding wheel is rotatably installed inside the wheel seat. A winch shaft is provided at the end of the two slide rail square tubes away from the wheel seat fixing plate. Four winches are provided on the outside of the winch shaft. The same pull and push cable is wound in every two adjacent winches. Each pull and push cable is wound in the cable winding wheel in each wheel seat. The side of each pull and push cable away from the slide rail square tube is fixedly connected to the upper end of the push beam. The winch shaft is drivenly connected to the output end of the motor.

[0010] A further feature of this invention is that four ratchet wheels are fixedly sleeved on the outer wall of the winch shaft, and the four ratchet wheels are respectively sleeved in the four winches. A set of locking tooth sleeves is fixedly arranged in a circumferential array on the inner wall of the winch hole. Locking ratchet teeth are slidably sleeved in the locking tooth sleeves. Each locking ratchet tooth meshes with each ratchet wheel. A push tooth spring is fixedly connected to the end face of the locking ratchet tooth away from the ratchet wheel. The end of the push tooth spring away from the locking ratchet tooth is fixedly connected to the inner wall of the winch hole. The ratchet tooth surfaces near the two ends of the winch shaft are opposite to the ratchet tooth surfaces away from the two ends of the winch shaft.

[0011] A further feature of this invention is that rotational stabilizing sleeves are fixedly sleeved on both ends of the winch, and both rotational stabilizing sleeves are rotatably sleeved on the outer side of the winch shaft wall.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model utilizes a pressure plate spring positioned between the spring sleeve and the spring seat to automatically adjust the pressure of the scraper on the ground based on the resistance of fecal accumulation. When the resistance is too high, the scraper can compress the spring and lift, achieving overload protection and effectively preventing the drive motor from stalling and damage to the transmission mechanism, significantly improving the reliability and automation of the equipment.

[0014] 2. This utility model uses a sliding and rotating composite connection structure consisting of a slide rod, a shaft tube, and a rotating tube, which allows the scraper to flexibly adapt to uneven changes in the ground during the pushing process, ensuring that the lower end of the scraper maintains good contact with the ground, thereby achieving a more thorough and uniform cleaning effect on the manure trough. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an automatic manure removal scraper mechanism for pig pens.

[0017] Figure 2 This is a structural schematic diagram of the conveyor frame and the push beam.

[0018] Figure 3 This is a side sectional view of the conveyor frame and the push beam.

[0019] Figure 4 This is a structural diagram of the slide rail square tube and the pulling frame.

[0020] Figure 5This is a schematic diagram of the slide rail square tube and wheel seat.

[0021] Figure 6 This is a schematic diagram of the winch shaft and winch structure.

[0022] Figure 7 This is a side sectional view of the winch.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-Pull-Conveyor frame, 101-Slide rod, 101a-Limit sleeve, 102-Slide rail square tube, 102a-Cantilever groove, 102b-Roller, 102b-1-Cantilever, 102c-Wheel seat fixing plate, 102c-1-Wheel seat, 102c-2-Cable winding wheel, 103-Windshaft, 103a-Windshaft, 103a-1-Pull-Pull cable, 103a-2-Locking tooth slide sleeve, 103 a-3-Locking ratchet, 103a-4-Push tooth spring, 103a-5-Rotation stabilizing sleeve, 103b-Ratchet, 2-Scraper, 201-Rotating tube, 202-Adapter ear, 203-Fixed shaft tube, 3-Push beam, 301-Shaft tube sleeve, 302-Shaft tube, 302a-Spring sleeve, 303-Spring seat tube, 303a-Spring seat, 303a-1-Pressure plate spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1 to 7This utility model relates to an automatic manure removal scraper mechanism for pig pens, comprising a conveying frame 1, a scraping plate 2, and a pushing beam 3. The conveying frame 1 has an H-shaped structure. A sliding rod 101 is fixedly installed below each of the two side frame bars of the conveying frame 1. A shaft sleeve 301 is fixedly installed at both ends of the lower side of the pushing beam 3. A shaft tube 302 is rotatably sleeved inside the shaft sleeve 301. Both ends of the shaft tube 302 are slidably sleeved on the outside of the sliding rod 101. A set of spring sleeves 302a is axially arrayed and fixed on one side of the outer wall of the shaft tube 302. A rotating tube 201 is fixedly installed on the upper end face of the scraping plate 2. A fixed shaft tube 203 is rotatably sleeved inside the rotating tube 201. Both ends of the fixed shaft tube 203 are fixedly installed at the ends of the two sliding rods 101 away from the pushing beam 3. Adapter ears 202 are fixedly installed on both sides of the scraping plate 2 on the side closest to the pushing beam 3. A spring seat tube 303 is rotatably installed between the side adapter ears 202. A set of spring seats 303a is axially arrayed and fixed on one side of the outer wall of the spring seat tube 303. Each spring seat 303a is sleeved in the spring sleeve 302a. A pressure plate spring 303a-1 is sleeved inside the spring seat 303a. The two ends of the pressure plate spring 303a-1 are fixedly connected to the end face of the spring seat 303a and the end face of the spring sleeve 302a, respectively. Through the pressure plate spring 303a-1 set between the spring sleeve 302a and the spring seat 303a, the pressure of the scraper 2 on the ground can be automatically adjusted according to the resistance of fecal accumulation. When the resistance is too high, the scraper 2 can compress the spring and lift up, realizing overload protection, effectively avoiding the drive motor stalling and transmission mechanism damage, and significantly improving the reliability and automation of equipment operation.

[0028] Specifically, limiting sleeves 101a are fixedly provided on the lower side of the two side frame bars of the conveying frame 1 away from the fixed shaft tube 203. The limiting sleeves 101a are fixedly sleeved on the outside of the slide rod 101. The two ends of the shaft tube 302 are respectively sleeved on the side of the limiting sleeves 101a away from the fixed shaft tube 203. The limiting sleeves 101a provide precise limit for the sliding stroke of the shaft tube 302, preventing it from getting too close to the fixed shaft tube 203, which would cause the pressure plate spring 303a-1 to be unable to apply pressure to the surface of the floor 2.

[0029] Furthermore, two sliding rail square tubes 102 are respectively provided on both sides of the conveying frame 1. The length direction of the sliding rail square tube 102 is parallel to the axis of the sliding rod 101. A cantilever groove 102a is opened through the middle section of the lower side wall of the sliding rail square tube 102. A roller 102b is sleeved inside the sliding rail square tube 102. The axle of the roller 102b is rotatably connected to a cantilever 102b-1, which is sleeved in the cantilever groove 102a. The two cantilever 102b-1 are respectively fixedly installed on the outer side of the two side frame bars of the conveying frame 1. The two sliding rail square tubes 102 are respectively fixedly installed on the upper end of the two side walls of the manure trough. The rolling of the roller 102b in the sliding rail square tube 102 provides a smooth movement path for the entire manure cleaning mechanism, significantly reducing the movement resistance and ensuring the smooth operation of the manure cleaning operation.

[0030] Furthermore, a wheel seat fixing plate 102c is fixedly connected between the two slide rail square tubes 102. Both ends of the wheel seat fixing plate 102c are fixedly connected to one end of the slide rail square tube 102. Two wheel seats 102c-1 are fixedly installed on the surface of the wheel seat fixing plate 102c. A cable winding wheel 102c-2 is rotatably installed inside the wheel seat 102c-1. A winch shaft 103 is provided at the end of the two slide rail square tubes away from the wheel seat fixing plate 102c. Four winches 103a are provided on the outer side of the winch shaft 103a. Each pair of adjacent winches 103a... The same pull-pull cable 103a-1 is wound in the middle, and each pull-pull cable 103a-1 is wound around the cable sheave 102c-2 in each wheel seat 102c-1. The side of each pull-pull cable 103a-1 away from the slide rail square tube 102 is fixedly connected to the upper end of the push beam 3. The winch shaft 103 is connected to the output end of the motor for transmission. This transmission system realizes the reciprocating motion of the push beam 3 by winding and releasing the pull-pull cable 103a-1 through the winch 103a. The cable sheave 102c-2 effectively reduces cable wear and ensures the reliability of power transmission.

[0031] Furthermore, four ratchet wheels 103b are fixedly sleeved on the outer wall of the winch shaft 103. The four ratchet wheels 103b are respectively sleeved in the four winches 103a. A set of locking tooth sleeves 103a-2 are fixedly arranged in a circumferential array on the inner wall of the disc hole of the winch 103a. Locking ratchet teeth 103a-3 are slidably sleeved in the locking tooth sleeves 103a-2. Each locking ratchet tooth 103a-3 meshes with each ratchet wheel 103b. A push tooth spring 103a-4 is fixedly connected to the end face of the locking ratchet tooth 103a-3 away from the ratchet wheel 103b. The end of the push tooth spring 103a-4 away from the locking ratchet tooth 103a-3 is fixedly connected to the inner wall of the disc hole of the winch 103a. The tooth surfaces of the ratchet wheels 103b near the two ends of the winch shaft 103 and the teeth of the ratchet wheels 103b away from the two ends of the winch shaft 103 are... On the other hand, during the manure cleaning operation, the motor drives the winch shaft 103 to rotate, causing the winch shaft 103 to drive two self-locking winches 103a to wind up the two pull cables 103a-1. At the same time, the other two winches 103a on the winch shaft 103 are no longer self-locked with the winch shaft 103, causing the two pull cables 103a-1 to be wound from one set of winches 103a to another set of winches 103a, and driving the push beam 3 to move, thereby driving the scraper 2 to push out the pig manure in the manure trough. After the scraper 2 completes one cleaning cycle, the motor reverses, causing the winch shaft 103 to reverse, causing the two pull cables 103a-1 to move in opposite directions, and driving the push beam 3 to move. When the two ends of the push beam 3 move on the slide bar 101, they first drive the scraper 2 to lift up, preventing the scraper 2 from scraping up the pig manure when it resets and moves.

[0032] Furthermore, rotational stabilizing sleeves 103a-5 are fixedly sleeved on both ends of the winch 103a, and both rotational stabilizing sleeves 103a-5 are rotatably sleeved on the outer side of the shaft wall of the winch shaft 103; the rotational stabilizing sleeves 103a-5 provide additional support for the winch 103a.

[0033] The operation process in this embodiment is as follows:

[0034] During manure removal, the motor drives the winch shaft 103 to rotate, causing the two winches 103a near the ends of the shaft to rotate synchronously through the engagement of the locking ratchet 103a-3 and the ratchet 103b, thus winding the two pull cables 103a-1. Simultaneously, the two winches 103a away from the ends of the shaft are in an idling state due to the opposite direction of the ratchet teeth, releasing the corresponding pull cables. The wound pull cables drive the entire scraper mechanism forward along the slide rail square tube 102 via the push beam 3. At this time, the scraper plate 2 maintains contact pressure with the ground under the action of the pressure plate spring 303a-1, thus removing the manure. Push towards the manure collection end; when encountering significant resistance, the compressible pressure plate spring 303a-1 of the scraper 2 automatically lifts to achieve overload protection; after completing a single-stroke manure cleaning, the motor reverses, and the winch shaft 103 reverses. At this time, the previously idle winch 103a turns into a locked winding state, while the previously working winch 103a turns into an idle state, pulling the push beam 3 back; in the initial stage of the return stroke, the shaft tube 302 slides along the slide rod 101 towards the fixed shaft tube 203, and drives the scraper 2 to rotate and lift around the fixed shaft tube 203 through the spring seat tube 303, avoiding bringing the manure back to the starting position, thus achieving the one-way manure cleaning function.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An automatic manure removal scraper mechanism for pig pens, comprising a conveying frame (1), a scraping floor (2), and a pushing beam (3), characterized in that: The conveying frame (1) has an H-shaped structure. A slide rod (101) is fixedly installed below the frame bars on both sides of the conveying frame (1). A shaft sleeve (301) is fixedly installed at both ends of the lower side of the push beam (3). A shaft tube (302) is rotatably sleeved inside the shaft sleeve (301) at both ends. The two ends of the shaft tube (302) are slidably sleeved on the outside of the slide rod (101). A set of spring sleeves (302a) is axially arrayed and fixed on one side of the outer wall of the shaft tube (302). A rotating tube (201) is fixedly installed on the upper end face of the scraper (2). A fixed shaft tube (203) is rotatably sleeved inside the rotating tube (201). The two ends of the fixed shaft tube (203) are fixedly installed on the upper end face of the scraper (2). Two sliding rods (101) are located away from the end of the push beam (3). The scraper plate (2) is fixed with adapter ears (202) on both sides of the side plate near the push beam (3). A spring seat tube (303) is rotatably installed between the two adapter ears (202). A set of spring seats (303a) is axially arrayed on one side of the outer wall of the spring seat tube (303). Each spring seat (303a) is sleeved in each spring sleeve (302a). A pressure plate spring (303a-1) is sleeved in the spring seat (303a). The two ends of the pressure plate spring (303a-1) are fixedly connected to the end face of the spring seat (303a) and the end face of the spring sleeve (302a).

2. The automatic manure removal scraper mechanism for pig pens according to claim 1, characterized in that: Limiting sleeves (101a) are fixedly provided on the lower side of the two side frames of the pull frame (1) away from the fixed shaft tube (203). The limiting sleeves (101a) are fixedly sleeved on the outside of the slide rod (101). The two ends of the shaft tube (302) are respectively sleeved on the side of the limiting sleeves (101a) away from the fixed shaft tube (203).

3. The automatic manure removal scraper mechanism for pig pens according to claim 2, characterized in that: The two sides of the conveying frame (1) are respectively provided with slide rail square tubes (102). The length direction of the slide rail square tubes (102) is parallel to the rod axis of the slide rod (101). A cantilever groove (102a) is opened through the middle section of the lower side wall of the slide rail square tubes (102). A roller (102b) is sleeved inside the slide rail square tubes (102). The axle of the roller (102b) is rotated and sleeved with a cantilever (102b-1). The cantilever (102b-1) is sleeved in the cantilever groove (102a). The two cantilever (102b-1) are respectively fixedly installed on the outside of the two side frame bars of the conveying frame (1).

4. The automatic manure removal scraper mechanism for pig pens according to claim 3, characterized in that: A wheel seat fixing plate (102c) is fixedly connected between the two slide rail square tubes (102). Both ends of the wheel seat fixing plate (102c) are fixedly connected to one end of each slide rail square tube (102). Two wheel seats (102c-1) are fixedly installed on the surface of the wheel seat fixing plate (102c). A cable-winding wheel (102c-2) is rotatably installed inside each wheel seat (102c-1). A winch shaft (103) is provided at the end of each of the two slide rail square tubes (102) away from the wheel seat fixing plate (102c). Four winches (103a) are provided on the outside of the winch shaft (103). The same pull cable (103a-1) is wound in every two adjacent winches (103a). Each pull cable (103a-1) is wound around the cable sheave (102c-2) in each wheel seat (102c-1). The side of each pull cable (103a-1) away from the slide rail square tube (102) is fixedly connected to the upper end of the push beam (3). The winch shaft (103) is connected to the output end of the motor.

5. The automatic manure removal scraper mechanism for pig pens according to claim 4, characterized in that: The outer wall of the winch shaft (103) is fixedly sleeved with four ratchet wheels (103b), which are respectively sleeved in the four winches (103a). A set of locking tooth sleeves (103a-2) is fixedly arranged in a circumferential array on the inner wall of the disc hole of the winch (103a). Locking ratchet teeth (103a-3) are slidably sleeved in the locking tooth sleeves (103a-2). Each locking ratchet tooth (103a-3) is respectively engaged with each ratchet wheel (103a-2). 03b) Engagement, the end face of the locking ratchet (103a-3) away from the ratchet (103b) is fixedly connected to a push tooth spring (103a-4), the end of the push tooth spring (103a-4) away from the locking ratchet (103a-3) is fixedly connected to the inner wall of the winch (103a) disc hole, and the tooth surface of the ratchet (103b) near both ends of the winch shaft (103) is opposite to the tooth surface of the ratchet (103b) away from both ends of the winch shaft (103).

6. The automatic manure removal scraper mechanism for pig pens according to claim 5, characterized in that: Rotational stabilizing sleeves (103a-5) are fixedly sleeved on both ends of the winch (103a), and the rotational stabilizing sleeves (103a-5) on both sides are rotatably sleeved on the outside of the shaft wall of the winch shaft (103).