Chain chipping impurity removal device

Abstract

The utility model discloses a chain chipping impurity removing device which comprises a supporting table, a chipping removing mechanism is arranged on the supporting table, the chipping removing mechanism comprises a mounting frame, a high-pressure air pump, a flow dividing pipe, high-pressure spray heads, a motor, a rotating rod, a driving roller, a support and a transmission roller, and a pressure adjusting mechanism is arranged on the high-pressure spray heads. The pressure adjusting mechanism comprises an adjusting sleeve, a rotating sleeve, a connecting sleeve, a center rod, a sliding sleeve, a transmission sleeve, a spiral plate and a positioning mechanism, the adjusting sleeve is installed at the top end of the high-pressure nozzle, the rotating sleeve is installed at the bottom end of the flow dividing pipe and rotationally connected with the adjusting sleeve, the connecting sleeve is installed on the inner side of the rotating sleeve, the center rod is installed in the connecting sleeve, and the sliding sleeve slides on the outer wall of the center rod; the transmission sleeve is installed on the outer side of the sliding sleeve, an operator can rotate the adjusting sleeve to drive the whole mechanism to operate, and finally the flowing space between the spiral plates is changed, so that the opening size and the air pressure intensity of the spray head are adjusted, and the design allows according to the characteristics or pollution degrees of different chains.

Description

Technical Field

[0001] This utility model relates to the field of chain manufacturing and maintenance technology, and more specifically, it relates to a chain debris removal device. Background Technology

[0002] In the chain manufacturing and maintenance process, effectively removing debris and impurities from the chain surface is a key step in ensuring chain performance and lifespan. Traditional chain cleaning methods often use high-pressure airflow to remove debris. While this method is simple and direct, it has significant limitations. First, a fixed air pressure output is difficult to adapt to different types and levels of contamination in chains. For lightly contaminated chains, excessively high air pressure may cause unnecessary energy waste and may even damage the chain surface. For heavily contaminated or complex chains, a uniform air pressure may not achieve the desired cleaning effect. In addition, a single blowing method is difficult to thoroughly clean all parts of the chain, especially for chains with complex structures and deep crevices, which often fail to achieve a thorough cleaning.

[0003] More importantly, existing chain debris removal devices typically lack a mechanism for precisely adjusting air pressure and flow rate. This lack of adjustment capability results in a lack of flexibility and specificity in the cleaning process. In practical applications, different chains often require different cleaning intensities due to differences in their materials, structures, and operating environments. For example, small chains used in precision instruments may require lower air pressure to avoid damage, while heavy industrial chains may require higher air pressure to effectively remove stubborn stains. Furthermore, different parts of the same chain may also require different cleaning intensities. Cleaning devices without adjustment mechanisms struggle to meet these diverse needs, not only affecting cleaning effectiveness but also potentially causing energy waste or equipment damage. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, the present invention provides a chain debris removal device to solve the technical problem mentioned in the background art that existing chain debris removal devices usually lack a mechanism for precise adjustment of air pressure and flow rate. This lack of adjustment capability leads to a lack of flexibility and targetedness in the cleaning process.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a chain debris removal device, comprising a support platform, on which a debris removal mechanism is provided. The debris removal mechanism includes a mounting frame, a high-pressure air pump, a diverter pipe, a high-pressure nozzle, a motor, a rotating rod, a drive roller, a bracket, and a transmission roller. The mounting frame is mounted on the top surface of the support platform, the high-pressure air pump is mounted on the top surface of the mounting frame, the diverter pipe is mounted on the mounting frame and connected to the output end of the high-pressure air pump, multiple sets of high-pressure nozzles are provided and mounted at the bottom end of the diverter pipe, the motor is mounted inside the support platform, and the rotating rod is mounted on the motor output... At the end, the drive roller is mounted on the rotating rod, the bracket is mounted on the support platform, and the transmission roller is rotatably mounted on the bracket. Multiple sets of high-pressure nozzles are equipped with a pressure regulating mechanism. The pressure regulating mechanism includes an adjusting sleeve, a rotating sleeve, a connecting sleeve, a central rod, a sliding sleeve, a transmission sleeve, a spiral plate, and a positioning mechanism. The adjusting sleeve is mounted on the top of the high-pressure nozzle, the rotating sleeve is mounted on the bottom of the diverter pipe and rotatably connected to the adjusting sleeve, the connecting sleeve is mounted inside the rotating sleeve, the central rod is mounted inside the connecting sleeve, the sliding sleeve slides on the outer wall of the central rod, the transmission sleeve is mounted on the outer side of the sliding sleeve, and the spiral plate is mounted on the inner wall of the adjusting sleeve.

[0008] The present invention is further configured such that both the bracket and the transmission roller are provided with two sets distributed on both sides of the drive roller, and the outer sides of both sets of transmission rollers are provided with protrusions adapted to the chain. This design ensures stable conveying of the chain during the cleaning process. The transmission rollers on both sides provide balanced support, while the outer protrusions are precisely matched with the chain to prevent the chain from shifting or shaking under the action of high-pressure airflow, thereby improving the cleaning effect and the operational stability of the equipment.

[0009] The present invention is further configured such that a connecting block is installed at the bottom end of the spiral plate, and the connecting block is rotatably connected to the sliding sleeve. This connection method realizes flexible transmission between the spiral plate and the sliding sleeve, allowing the spiral plate to drive the sliding sleeve to move up and down while rotating, thereby precisely controlling the size of the airflow channel and realizing fine adjustment of air pressure.

[0010] The present invention is further configured such that the central rod is polygonal and is slidably connected to the sliding sleeve and the connecting block respectively. The polygonal design increases the contact area and transmission stability, prevents rotation during sliding, ensures the linear movement of the sliding sleeve and the connecting block, and improves the accuracy and reliability of the pressure adjustment process.

[0011] The present invention is further configured such that the transmission sleeve is threadedly connected to the inner wall of the adjustment sleeve. This threaded connection allows for precise control of the position of the transmission sleeve by rotating the adjustment sleeve, thereby achieving fine adjustment of the position of the sliding sleeve and further improving the accuracy and flexibility of air pressure regulation.

[0012] The present invention is further configured such that a connecting plate is installed at the bottom end of the adjusting sleeve, and the connecting plate is rotatably connected to the bottom end of the central rod. This design ensures that the central rod remains vertical during the adjustment process, while allowing the adjusting sleeve to rotate freely, thereby improving the operational stability and adjustment smoothness of the entire pressure regulating mechanism.

[0013] The present invention is further configured such that the positioning mechanism includes positioning grooves, positioning blocks, locking sleeves, push springs, and guide bars. Multiple sets of positioning grooves are distributed on the outer wall of the adjusting sleeve, multiple sets of positioning blocks are slidably mounted on the outer wall of the rotating sleeve, the locking sleeve slides on the outer wall of the adjusting sleeve, multiple sets of push springs are provided with their two ends respectively connected to the locking sleeve and the adjusting sleeve, and multiple sets of guide bars are distributed on the outer wall of the adjusting sleeve and slidably connected to the locking sleeve. This complex positioning mechanism design realizes automatic locking and precise positioning of the pressure adjustment setting. Multiple sets of positioning grooves and positioning blocks provide multi-level adjustment options, push springs ensure the automaticity and reliability of locking, and guide bars ensure the smoothness and accuracy of the movement of the locking sleeve.

[0014] The present invention is further configured such that a reset spring is installed on each of the multiple sets of positioning blocks. The reset springs are provided in multiple sets and are all connected to the outer wall of the rotating sleeve. The design of the reset springs ensures that the positioning blocks can automatically return to the initial position after unlocking, which facilitates the next locking operation. The multiple sets of reset springs increase the reliability of the system and also improve the convenience and efficiency of the adjustment operation.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a chain debris removal device, which has the following features:

[0017] Beneficial effects:

[0018] 1. The chip removal mechanism, through a combination of a high-pressure air pump, a diverter pipe, and multiple sets of high-pressure nozzles, combined with a motor-driven drive roller and transmission roller system, achieves efficient chain cleaning. This design not only generates a strong airflow for chip removal but also ensures stable chain transport during the cleaning process. The raised design on the outside of the transmission roller is adapted to the chain, further improving the stability and accuracy of the transport. The arrangement of multiple sets of high-pressure nozzles makes the cleaning process more comprehensive, covering all parts of the chain and effectively solving the problem that traditional single air blowing methods are difficult to thoroughly clean.

[0019] 2. The design of the pressure regulating mechanism greatly improves the flexibility and adaptability of the device. Through the ingenious combination of the adjusting sleeve, rotating sleeve, connecting sleeve, central rod, sliding sleeve, transmission sleeve, and spiral plate, precise adjustment of the air pressure of each high-pressure nozzle is achieved. The operator can rotate the adjusting sleeve to drive the entire mechanism, ultimately changing the flow space between the spiral plates, thereby adjusting the nozzle opening size and air pressure intensity. This design allows for flexible adjustment of the cleaning intensity according to the characteristics or degree of contamination of different chains, ensuring cleaning effect while avoiding unnecessary damage to the chains. The design of the polygonal central rod further increases the accuracy and stability of the adjustment.

[0020] 3. The introduction of the positioning mechanism solves the problem of the pressure setting being easily changed accidentally, greatly improving the reliability and ease of use of the device. The combination of positioning groove, positioning block, locking sleeve, push spring and guide bar forms an automatic locking system. When the ideal air pressure setting is reached, the locking sleeve automatically slides down under the action of the push spring, so that the positioning block is embedded in the positioning groove, thereby locking the setting. Multiple sets of guide bars ensure the smoothness of the locking process, and the design of the reset spring allows the positioning block to automatically return to the initial position after unlocking, which is convenient for the next operation. This design not only ensures the stability of the air pressure setting during the cleaning process, but also greatly improves the convenience and efficiency of operation. Operators can easily switch between different air pressure settings to adapt to the cleaning needs of different types of chains, and do not have to worry about the setting being changed accidentally during use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a chain debris removal device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the drive roller and transmission roller in this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the high-pressure nozzle and the diverter pipe in this utility model;

[0024] Figure 4 This is a cross-sectional view of the pressure regulating mechanism in this utility model;

[0025] Figure 5 This is a partial structural diagram of the positioning mechanism in this utility model.

[0026] In the diagram: 1. Support platform; 2. Mounting bracket; 3. High-pressure air pump; 4. Diverter pipe; 5. High-pressure nozzle; 6. Motor; 7. Rotating rod; 8. Drive roller; 9. Bracket; 10. Transmission roller; 11. Adjusting sleeve; 12. Rotating sleeve; 13. Connecting sleeve; 14. Center rod; 15. Sliding sleeve; 16. Transmission sleeve; 17. Spiral plate; 18. Connecting block; 19. Connecting disc; 20. Positioning groove; 21. Positioning block; 22. Locking sleeve; 23. Push spring; 24. Guide bar; 25. Return spring. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5 A chain debris removal device includes a support platform 1, on which a debris removal mechanism is mounted. The debris removal mechanism includes a mounting frame 2, a high-pressure air pump 3, a diverter pipe 4, high-pressure nozzles 5, a motor 6, a rotating rod 7, a drive roller 8, a bracket 9, and a transmission roller 10. The mounting frame 2 is mounted on the top surface of the support platform 1, the high-pressure air pump 3 is mounted on the top surface of the mounting frame 2, the diverter pipe 4 is mounted on the mounting frame 2 and connected to the output end of the high-pressure air pump 3, multiple sets of high-pressure nozzles 5 are mounted on the bottom end of the diverter pipe 4, the motor 6 is mounted inside the support platform 1, the rotating rod 7 is mounted on the output end of the motor 6, the drive roller 8 is mounted on the rotating rod 7, and the bracket 9 is mounted on the support platform. On the 1st, the transmission roller 10 is rotatably mounted on the bracket 9. Multiple sets of high-pressure nozzles 5 are equipped with a pressure regulating mechanism. The pressure regulating mechanism includes an adjusting sleeve 11, a rotating sleeve 12, a connecting sleeve 13, a central rod 14, a sliding sleeve 15, a transmission sleeve 16, a spiral plate 17, and a positioning mechanism. The adjusting sleeve 11 is mounted on the top of the high-pressure nozzle 5, the rotating sleeve 12 is mounted on the bottom of the diverter pipe 4 and is rotatably connected to the adjusting sleeve 11, the connecting sleeve 13 is mounted inside the rotating sleeve 12, the central rod 14 is mounted inside the connecting sleeve 13, the sliding sleeve 15 slides on the outer wall of the central rod 14, the transmission sleeve 16 is mounted on the outer side of the sliding sleeve 15, and the spiral plate 17 is mounted on the inner wall of the adjusting sleeve 11.

[0031] Both the bracket 9 and the transmission roller 10 are provided with two sets distributed on both sides of the drive roller 8. The outer side of both sets of transmission rollers 10 is provided with protrusions that are adapted to the chain. This design forms a stable three-point support structure by setting transmission rollers 10 on both sides of the drive roller 8. The protrusions on the outer side of the transmission roller 10 mesh with the chain to ensure that the chain maintains linear motion during high-pressure cleaning, preventing the chain from deviating or swinging, thereby improving cleaning efficiency and quality.

[0032] A connecting block 18 is installed at the bottom of the spiral plate 17. The connecting block 18 is rotatably connected to the sliding sleeve 15. This connection method allows the rotational motion of the spiral plate 17 to be converted into the up-and-down movement of the sliding sleeve 15. The connecting block 18, as an intermediate transmission component, ensures the smoothness and precision of the movement, thereby achieving fine adjustment of air pressure.

[0033] The center rod 14 is polygonal and is slidably connected to the sliding sleeve 15 and the connecting block 18 respectively. The polygonal design increases the contact area and prevents the sliding sleeve 15 and the connecting block 18 from rotating during sliding, ensuring that they can only move along the axial direction of the center rod 14. This design improves the stability and accuracy of the pressure regulating mechanism.

[0034] The transmission sleeve 16 is threadedly connected to the inner wall of the adjusting sleeve 11. This threaded connection mechanism allows the axial position of the transmission sleeve 16 to be precisely controlled by rotating the adjusting sleeve 11, thereby adjusting the position of the sliding sleeve 15 and achieving fine-tuning of the air pressure, which improves the accuracy and controllability of the pressure regulation process.

[0035] A connecting plate 19 is installed at the bottom of the adjusting sleeve 11. The connecting plate 19 is rotatably connected to the bottom of the center rod 14. This design allows the center rod 14 to remain vertical during adjustment, while allowing the adjusting sleeve 11 to rotate freely, ensuring the stability of the entire pressure regulating mechanism and the smoothness of adjustment.

[0036] In this embodiment, firstly, the high-pressure air pump 3 generates high-pressure airflow, which is distributed to multiple high-pressure nozzles 5 through the diverter pipe 4. Simultaneously, the motor 6 drives the rotating rod 7 to rotate, which in turn drives the drive roller 8 to rotate. The chain is conveyed through the drive roller 8 and the transmission rollers 10 on both sides. The protrusions on the outer side of the transmission roller 10 ensure stable chain transmission. When the chain passes under the high-pressure nozzle 5, the high-pressure airflow is ejected from the nozzle, blowing away debris and impurities on the chain surface to achieve cleaning. By rotating the adjusting sleeve 11, the connecting sleeve 13 and the central rod 14 are rotated. The connecting block 18 at the bottom of the spiral plate 17 is connected to the sliding sleeve 15, allowing the sliding sleeve 15 to move up and down on the polygonal central rod 14. The transmission sleeve 16 on the outer side of the sliding sleeve 15 is threadedly connected to the inner wall of the adjusting sleeve 11, further precisely controlling the position of the sliding sleeve 15. The position change of the sliding sleeve 15 compresses or stretches the spiral plate 17, thereby changing the flow space between the spiral plates 17, directly affecting the opening size of the high-pressure nozzle 5, and thus adjusting the air pressure intensity.

[0037] Please see Figure 5 As one implementation of the positioning mechanism: the positioning mechanism includes a positioning groove 20, a positioning block 21, a locking sleeve 22, a push spring 23, and a guide bar 24. The positioning groove 20 is provided with multiple sets distributed on the outer wall of the adjusting sleeve 11. The positioning block 21 is provided with multiple sets slidably mounted on the outer wall of the rotating sleeve 12. The locking sleeve 22 slides on the outer wall of the adjusting sleeve 11. The push spring 23 is provided with multiple sets and its two ends are respectively connected to the locking sleeve 22 and the adjusting sleeve 11. The guide bar 24 is provided with multiple sets distributed on the outer wall of the adjusting sleeve 11 and slidably connected to the locking sleeve 22.

[0038] Each of the multiple positioning blocks 21 is equipped with a return spring 25. There are multiple sets of return springs 25, and each set is connected to the outer wall of the rotating sleeve 12. The design of the return spring 25 ensures that the positioning block 21 can automatically return to the initial position after unlocking. The multiple sets increase the reliability of the system, facilitate the next locking operation, and improve the convenience and efficiency of the adjustment operation.

[0039] More specifically, after adjusting to the ideal air pressure, the locking sleeve 22 slides downward under the action of the push spring 23, so that the positioning block 21 is embedded in the positioning groove 20 on the outer wall of the adjusting sleeve 11. Multiple sets of guide bars 24 ensure the smooth movement of the locking sleeve 22. This locking mechanism prevents the adjusting sleeve 11 from rotating accidentally during use and maintains the stability of the set air pressure. When readjustment is required, the locking sleeve 22 can be pushed up against the force of the push spring 23, so that the positioning block 21 is disengaged from the positioning groove 20. The reset spring 25 on the positioning block 21 ensures that the positioning block 21 can automatically return to the initial position after unlocking, which is convenient for the next locking operation.

[0040] In summary, during the use or operation of the overall equipment: First, the high-pressure air pump 3 generates high-pressure airflow, which is distributed to multiple high-pressure nozzles 5 through the diverter pipe 4. Simultaneously, the motor 6 drives the rotating rod 7 to rotate, which in turn drives the drive roller 8 to rotate. The chain is conveyed through the drive roller 8 and the transmission rollers 10 on both sides. The protrusions on the outer side of the transmission roller 10 ensure stable chain transmission. When the chain passes under the high-pressure nozzle 5, the high-pressure airflow is sprayed out from the nozzle, blowing away debris and impurities on the surface of the chain, thus achieving cleaning. By rotating the adjusting sleeve 11, the connecting sleeve 13 and the central rod 14 are rotated. The connecting block 18 at the bottom of the spiral plate 17 is connected to the sliding sleeve 15, allowing the sliding sleeve 15 to move up and down on the polygonal central rod 14. The transmission sleeve 16 on the outer side of the sliding sleeve 15 is threadedly connected to the inner wall of the adjusting sleeve 11, further precisely controlling the position of the sliding sleeve 15. The positional change of the sliding sleeve 15 compresses or stretches the spiral plate 17, thereby changing the flow space between the spiral plates 17, directly affecting the opening size of the high-pressure nozzle 5, and thus adjusting the air pressure intensity.

[0041] Once the ideal air pressure is adjusted, the locking sleeve 22 slides downward under the action of the push spring 23, causing the positioning block 21 to embed into the positioning groove 20 on the outer wall of the adjusting sleeve 11. Multiple sets of guide bars 24 ensure the smooth movement of the locking sleeve 22. This locking mechanism prevents the adjusting sleeve 11 from rotating accidentally during use and maintains the stability of the set air pressure. When readjustment is required, the locking sleeve 22 can be pushed upward against the force of the push spring 23, causing the positioning block 21 to disengage from the positioning groove 20. The reset spring 25 on the positioning block 21 ensures that the positioning block 21 can automatically return to the initial position after unlocking, facilitating the next locking operation.

[0042] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A chain debris removal device, comprising a support platform (1), characterized in that: A chip removal mechanism is provided on the support platform (1). The chip removal mechanism includes a mounting frame (2), a high-pressure air pump (3), a diverter pipe (4), a high-pressure nozzle (5), a motor (6), a rotating rod (7), a drive roller (8), a bracket (9), and a transmission roller (10). The mounting frame (2) is installed on the top surface of the support platform (1), the high-pressure air pump (3) is installed on the top surface of the mounting frame (2), the diverter pipe (4) is installed on the mounting frame (2) and connected to the output end of the high-pressure air pump (3), multiple sets of high-pressure nozzles (5) are installed at the bottom end of the diverter pipe (4), the motor (6) is installed inside the support platform (1), the rotating rod (7) is installed at the output end of the motor (6), the drive roller (8) is installed on the rotating rod (7), the bracket (9) is installed on the support platform (1), and the transmission roller (10) is installed on the drive roller (9). 0) Rotatably mounted on the bracket (9), the multiple sets of high-pressure nozzles (5) are provided with a pressure regulating mechanism. The pressure regulating mechanism includes an adjusting sleeve (11), a rotating sleeve (12), a connecting sleeve (13), a central rod (14), a sliding sleeve (15), a transmission sleeve (16), a spiral plate (17) and a positioning mechanism. The adjusting sleeve (11) is installed at the top of the high-pressure nozzle (5), the rotating sleeve (12) is installed at the bottom of the diverter pipe (4) and is rotatably connected to the adjusting sleeve (11). The connecting sleeve (13) is installed inside the rotating sleeve (12). The central rod (14) is installed inside the connecting sleeve (13). The sliding sleeve (15) slides on the outer wall of the central rod (14). The transmission sleeve (16) is installed outside the sliding sleeve (15). The spiral plate (17) is installed on the inner wall of the adjusting sleeve (11).

2. The chain debris removal device according to claim 1, characterized in that: Both the bracket (9) and the transmission roller (10) are provided with two sets distributed on both sides of the drive roller (8), and the outer sides of both sets of transmission rollers (10) are provided with protrusions adapted to the chain.

3. The chain debris removal device according to claim 2, characterized in that: A connecting block (18) is installed at the bottom end of the spiral plate (17), and the connecting block (18) is rotatably connected to the sliding sleeve (15).

4. The chain debris removal device according to claim 3, characterized in that: The central rod (14) is polygonal and is slidably connected to the sliding sleeve (15) and the connecting block (18) respectively.

5. A chain debris removal device according to claim 4, characterized in that: The transmission sleeve (16) is threadedly connected to the inner wall of the adjusting sleeve (11).

6. The chain debris removal device according to claim 5, characterized in that: The bottom end of the adjusting sleeve (11) is provided with a connecting plate (19), which is rotatably connected to the bottom end of the center rod (14).

7. A chain debris removal device according to claim 6, characterized in that: The positioning mechanism includes a positioning groove (20), a positioning block (21), a locking sleeve (22), a push spring (23), and a guide bar (24). The positioning groove (20) is provided in multiple sets distributed on the outer wall of the adjusting sleeve (11). The positioning block (21) is provided in multiple sets and slidably installed on the outer wall of the rotating sleeve (12). The locking sleeve (22) slides on the outer wall of the adjusting sleeve (11). The push spring (23) is provided in multiple sets and its two ends are respectively connected to the locking sleeve (22) and the adjusting sleeve (11). The guide bar (24) is provided in multiple sets distributed on the outer wall of the adjusting sleeve (11) and slidably connected to the locking sleeve (22).

8. A chain debris removal device according to claim 7, characterized in that: multiple sets Each positioning block (21) is equipped with a reset spring (25), and multiple sets of reset springs (25) are provided and are all connected to the outer wall of the rotating sleeve (12).

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