A method and device for achieving bidirectional rotation sliding stop

Abstract

The application provides a method and device for realizing bidirectional rotation sliding stop, relates to the technical field of mechanical limiting, and comprises a moving plate, a center rotating body base fixedly connected to the upper surface of the moving plate, so that the moving plate can rotate relative to the fixed mechanism with a main shaft, a moving plate fixed pin fixedly connected to the upper side of the moving plate, a torsional spring arranged on the outer side of the moving plate fixed pin, and a first fixed plate fixed pin arranged at the end of the torsional spring away from the moving plate fixed pin. The method and device for realizing bidirectional rotation sliding stop do not need electric control and magnetic control elements, have simple structure and low cost, are suitable for use in flammable and explosive, strong electromagnetic interference or electrically and magnetically free environments, and can meet the bidirectional angle switching and end positioning requirements of different equipment.

Description

Technical Field

[0001] This invention relates to the field of mechanical limit technology, specifically to a method and apparatus for achieving bidirectional rotational sliding stop. Background Technology

[0002] Currently, in scenarios requiring angle switching and position maintenance, such as gimbals, handheld devices, medical devices, smart homes, and industrial equipment, motors, electromagnetic locks, magnetic components, sensors, friction braking structures, ratchet and pawl mechanisms, or ordinary slide rail limiting structures are commonly used to achieve rotational positioning. Among these, electronically or magnetically controlled structures can achieve a certain degree of precise control; friction braking structures can achieve rotational damping through contact friction; ratchet and pawl mechanisms can achieve unidirectional stopping; and ordinary slide rail limiting structures typically use a positioning mechanism that slides within a slide rail and forms a mechanical stop at the end of the slide rail, thereby limiting the rotation angle.

[0003] However, existing electrically or magnetically controlled rotary positioning structures have limitations in use in flammable, explosive, or strongly electromagnetically interfered environments, or environments requiring no electricity or magnetism. They are also complex and costly. Traditional friction braking structures are prone to decreased positioning stability due to wear. Ratchet and pawl mechanisms are mostly biased towards unidirectional stopping, with poor bidirectional adaptability. Ordinary slide rail limiting structures are prone to hard impacts when the positioning mechanism reaches the end of the slide rail, affecting positioning accuracy and service life. Furthermore, mechanisms using springs or torsion springs for assisted positioning may experience insufficient elasticity after long-term use, causing the positioning mechanism to fail to reliably reach the predetermined stopping position. Existing structures typically cannot identify this abnormality without disassembly and testing. Therefore, there is an urgent need for a purely mechanical bidirectional rotary stopping device to solve the problems of poor bidirectional stopping adaptability, large end impacts, insufficient positioning stability, and the difficulty in timely detection of insufficient torsion spring elasticity in existing technologies. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method and apparatus for achieving bidirectional rotational stopping. Through the mechanical cooperation of a fixing mechanism, a positioning mechanism, a torsion spring, a ball bearing buffer, and a color-changing indicator structure, it solves the problems of poor bidirectional stopping adaptability, large end impact, and insufficient torsion spring force in existing rotational positioning devices, which are difficult to detect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for achieving bidirectional rotational sliding stop, comprising: A movable plate has a central rotating body base fixedly connected to its upper surface, allowing the movable plate to rotate relative to the fixed mechanism with the main shaft. A movable plate fixing pin is fixedly connected to the upper side of the movable plate, and a torsion spring is provided on the outer side of the movable plate fixing pin. The main shaft is rotatably connected to the inside of the central rotating body base. When the movable plate rotates relative to the fixed mechanism and drives the positioning mechanism to move, the torsion spring can apply an elastic force to the movable plate.

[0006] A fixing mechanism, comprising a first fixing plate mechanism and a second fixing plate mechanism; A positioning mechanism is fixedly connected to the moving plate. The positioning mechanism includes a positioning pin cap and a positioning pin shaft. Observation holes are symmetrically arranged on both sides of the top of the positioning pin cap. A first elastic material layer, a pressure-sensitive color-changing material layer, and a second elastic material layer are arranged sequentially below the observation holes. The ball is arranged on the side of the second elastic material layer facing the fixing mechanism.

[0007] Preferably, the first fixed plate mechanism includes a first fixed plate, a first sliding groove, a first spindle mounting hole and a limiting mechanism. The limiting mechanism includes a sliding table, a first fixed plate main fixing hole, a groove and a limiting gasket. The first spindle mounting hole is rotatably connected to the spindle. The end of the torsion spring away from the moving plate fixing pin is provided with a first fixed plate fixing pin.

[0008] Preferably, the second fixed plate mechanism includes a second fixed plate, a second slide groove, and a variable diameter ball track. The second fixed plate mechanism also includes a second spindle mounting hole, a second fixed plate fixing pin, a second fixed plate main fixing hole, and a second fixed plate positioning hole. The variable diameter ball track is located on the second fixed plate. The variable diameter ball track is an arc-shaped track, and the track radius of the variable diameter ball track near both ends of the second slide groove is smaller than the track radius at the middle position. The positioning mechanism is fixedly connected to the moving plate and is set perpendicular to the arc direction of the second slide groove, so that the balls can enter and move along the variable diameter ball track.

[0009] Preferably, the moving plate is provided with an external connecting hole and a positioning mechanism mounting hole. The external connecting hole is used to connect with an external component to be rotated. A base pin is fixedly connected to the base of the central rotating body. A central rotating body is fixedly connected to the outside of the main shaft. A main shaft washer is provided between the main shaft and the central rotating body.

[0010] Preferably, the first fixed plate is provided with a first fixed plate positioning hole, a first fixed plate main fixing hole, and a hole for fixing the first fixed plate to the external equipment body.

[0011] Preferably, the limiting mechanism is located at both ends of the first slide groove, and the slide table and the groove are both located on the upper side of the limiting pad. The slide table is wedge-shaped, and the slide table and the groove are at a 120-degree angle. The top surface of the slide table is not higher than the surface of the fixing mechanism on the side close to the positioning mechanism. The slide table reduces the impact force when the positioning mechanism approaches the end of the first slide groove through the interaction force with the ball. When the positioning mechanism reaches the end of the first slide groove and stops, the ball can enter the groove to assist the positioning mechanism in positioning. When the elastic force of the torsion spring is insufficient to make the ball reach the predetermined positioning position, the ball can squeeze the first elastic material layer, the pressure-sensitive color-changing material layer and the second elastic material layer, causing the pressure-sensitive color-changing material layer to change color.

[0012] Preferably, the first elastic material layer and the second elastic material layer are made of silicone rubber, and the pressure-sensitive color-changing material layer is a crystal violet lactone microcapsule pressure-sensitive color-developing film.

[0013] Preferably, the inner surface of the first slide groove is further provided with a partitioned coating. The partitioned coating includes a central guide coating disposed in the middle region of the inner side of the first slide groove and end damping coatings disposed in the two end regions of the inner side of the first slide groove. The coating material of the central guide coating is polytetrafluoroethylene, and the coating material of the end damping coatings is polyurethane elastomer. The central guide coating accounts for 60% of the effective sliding length of the first slide groove, and the end damping coatings each account for 20% of the effective sliding length of the first slide groove.

[0014] A method for achieving bidirectional rotational parking includes: S1. Fix the fixing mechanism to the main body of the external equipment so that the main shaft can rotate relative to the fixing mechanism, and connect the moving plate to the main shaft so that the moving plate can rotate with the main shaft relative to the fixing mechanism. S2. Drive the moving plate to rotate along the first rotation direction or the second rotation direction, so that the positioning mechanism fixed on the moving plate moves along the first slide groove or the second slide groove, and cause the torsion spring provided between the first fixed plate fixing pin and the moving plate fixing pin to undergo elastic deformation. S3. When the positioning mechanism moves to one end of the first slide groove or the second slide groove, the elastic force applied to the moving plate by the torsion spring keeps the positioning mechanism at the corresponding end position of the first slide groove or the second slide groove, thereby realizing rotational sliding in the first direction or the second direction. S4. During the process of the positioning mechanism approaching the end of the first slide groove or the second slide groove, the ball set in the positioning mechanism cooperates with the buffer positioning structure on the fixing mechanism to buffer and assist positioning the sliding stop process of the positioning mechanism. The buffer positioning structure includes a limiting mechanism set at the end of the first slide groove or a variable diameter ball track set on the second fixed plate. S5. When the elastic force of the torsion spring is insufficient to make the ball reach the predetermined positioning position, the ball squeezes the second elastic material layer, the pressure-sensitive color-changing material layer and the first elastic material layer, causing the pressure-sensitive color-changing material layer to change color, and the state of insufficient elastic force of the torsion spring is displayed through the observation hole.

[0015] Preferably, when the fixing mechanism is a first fixed plate mechanism, the ball moves along the slide of the limiting mechanism when the positioning mechanism approaches the end of the first slide groove, and when the positioning mechanism reaches the end of the first slide groove and stops, the ball enters the groove of the limiting mechanism to buffer and assist in positioning the stopping process of the positioning mechanism.

[0016] Preferably, when the fixing mechanism is a second fixed plate mechanism, the ball enters and moves along the variable diameter ball track on the second fixed plate. When the ball approaches the two ends of the second slide groove, resistance is applied to the ball through the variable diameter ball track to buffer the sliding stop process of the positioning mechanism.

[0017] This invention provides a method and apparatus for achieving bidirectional rotational stopping. It has the following beneficial effects: This method and apparatus for achieving bidirectional rotary stop utilizes a fixed plate mechanism, a main shaft, a moving plate, a locating pin, a sliding groove mechanism, and a torsion spring. The moving plate rotates bidirectionally relative to the fixed plate mechanism with the main shaft, while the locating pin moves along an arc-shaped sliding groove. When the locating pin reaches the end of the sliding groove mechanism, the torsion spring applies an elastic force to the moving plate, holding the locating pin in its corresponding end position, thus achieving a purely mechanical bidirectional rotary stop. This structure requires no electrical or magnetic control components, is simple in design, and has low cost. It is suitable for environments involving flammable or explosive materials, strong electromagnetic interference, or environments requiring no electricity or magnetism. Furthermore, the stopping angle can be set via the arc-shaped path and end position, meeting the bidirectional angle switching and end positioning requirements of different devices.

[0018] Furthermore, this invention incorporates a ball bearing, a first elastic material layer, a pressure-sensitive color-changing material layer, and a second elastic material layer within the positioning pin, and provides an observation hole on the positioning pin. This allows the device to not only achieve sliding stop but also buffered positioning and status indication. In the first fixed-plate scheme, the ball bearing can cooperate with the slide and groove of the limiting mechanism to reduce the impact when the positioning pin approaches the end of the first slide groove and assists in positioning at the end sliding stop position. In the second fixed-plate scheme, the ball bearing can move along the variable-diameter ball bearing track and encounters resistance when approaching both ends of the second slide groove, thereby achieving buffering. If the elastic force of the torsion spring is insufficient and the ball bearing cannot reach the predetermined positioning position, it will squeeze the pressure-sensitive color-changing material layer and produce a color change. Maintenance personnel can directly determine whether there is a problem with insufficient elasticity of the torsion spring through the observation hole without disassembly or special testing, improving fault identification efficiency and maintenance convenience. Attached Figure Description

[0019] Figure 1 This is an exploded view of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 This is a side view of the present invention; Figure 5 This is a partial structural schematic diagram of the present invention; Figure 6 This is a schematic diagram of another part of the structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the second fixed plate mechanism of the present invention; Figure 9 This is a schematic diagram of the first fixed plate mechanism of the present invention; Figure 10 This is a rear view of the first fixed plate mechanism of the present invention.

[0020] The components include: 1. Moving plate; 2. Central rotating body base; 3. Positioning mechanism mounting hole; 4. Moving plate external connection hole; 5. Moving plate fixing pin; 6. Torsion spring; 7. Central rotating body; 8. Spindle washer; 9. Spindle; 10. First fixed plate; 11. Positioning mechanism; 12. First slide groove; 13. First elastic material layer; 14. Pressure-sensitive color-changing material layer; 15. Ball bearing; 16. Variable diameter ball bearing track; 17. First fixed plate positioning hole; 18. Limiting mechanism; 19. First fixed plate fixing pin; 20. 21. Base pin; 22. Observation hole; 23. First fixed plate main fixing hole; 24. Positioning pin cap; 25. First spindle mounting hole; 26. Second elastic material layer; 27. Slide table; 28. Groove; 29. ​​Limiting washer; 30. Middle guide coating; 31. End damping coating; 32. Second spindle mounting hole; 33. Second fixed plate main fixing hole; 34. Second fixed plate fixing pin; 35. Second fixed plate; 36. Second slide groove; 37. Fixing mechanism. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on 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.

[0022] Example 1 like Figure 1-7 As shown, this embodiment of the invention provides a device for bidirectional rotational sliding stop, including a movable plate 1, a central rotating body base 2 fixedly connected to the upper surface of the movable plate 1 so that the movable plate 1 can rotate with the main shaft 9 relative to the fixed mechanism 37, a movable plate fixing pin 5 fixedly connected to the upper side of the movable plate 1, a torsion spring 6 provided on the outer side of the movable plate fixing pin 5, a first fixed plate fixing pin 19 provided at the end of the torsion spring 6 away from the movable plate fixing pin 5, a main shaft 9 rotatably connected inside the central rotating body base 2, when the movable plate 1 rotates relative to the fixed mechanism 37 and drives the positioning mechanism 11 to move, the torsion spring 6 can apply an elastic force to the movable plate 1, the movable plate 1 is provided with a movable plate external connection hole 4 and a positioning mechanism mounting hole 3, the movable plate external connection hole 4 is used to connect with an external component to be rotated, a base pin 20 fixedly connected to the central rotating body base 2; a central rotating body 7 is fixedly connected to the outer side of the main shaft 9, and a main shaft washer 8 is provided between the main shaft 9 and the central rotating body 7.

[0023] The fixing mechanism 37 is a first fixed plate mechanism, which includes a first fixed plate 10, a first slide groove 12, a first spindle mounting hole 24, and a limiting mechanism 18. The limiting mechanism 18 includes a slide table 26, a first fixed plate main fixing hole 22, a groove 27, and a limiting pad 28. The first spindle mounting hole 24 is rotatably connected to the spindle 9. The first fixed plate 10 is provided with a first fixed plate positioning hole 17. The first fixed plate main fixing hole 22 is used to fix the first fixed plate 10 to the external equipment body. The limiting mechanism 18 is located at both ends of the first slide groove 12. The slide table 26 and the groove 27 are both located on the upper side of the limiting pad 28. The slide table 26 is wedge-shaped. The slide table 26 is at a 120-degree angle to the groove 27. The top surface of the slide table 26 is not higher than the surface of the fixing mechanism 37 near the positioning mechanism 11. The slide table 26 reduces the impact force when the positioning mechanism 11 approaches the end of the first slide groove 12 through the interaction force with the ball 15. When the positioning mechanism 11 reaches the end of the first slide groove 12 and stops, the ball 15 can enter the groove 27 to assist the positioning mechanism 11 in positioning. When the elastic force of the torsion spring 6 is insufficient to make the ball 15 reach the predetermined positioning position, the ball 15 can squeeze the first elastic material layer 13, the pressure-sensitive color-changing material layer 14 and the second elastic material layer 25, causing the pressure-sensitive color-changing material layer 14 to change color.

[0024] A positioning mechanism 11 is fixedly connected to the moving plate 1. The positioning mechanism 11 includes a positioning pin cap body 23 and a positioning pin shaft body. Observation holes 21 are symmetrically arranged on both sides of the top of the positioning pin cap body 23. A first elastic material layer 13, a pressure-sensitive color-changing material layer 14, and a second elastic material layer 25 are arranged sequentially at the bottom of the observation holes 21. The ball bearing 15 is arranged on the side of the second elastic material layer 25 facing the fixing mechanism 37.

[0025] Example 2 like Figure 9-10 As shown, based on Embodiment 1, this embodiment further employs a partitioned coating method within the first slide groove 12. The inner surface of the first slide groove 12 is also provided with a partitioned coating, which includes a central guide coating 29 disposed in the middle region of the inner side of the first slide groove 12 and end damping coatings 30 disposed in the two end regions of the inner side of the first slide groove 12. The coating material of the central guide coating 29 is polytetrafluoroethylene, and the coating material of the end damping coatings 30 is polyurethane elastomer. The central guide coating 29 accounts for 60% of the effective sliding length of the first slide groove 12, and the end damping coatings 30 each account for 20% of the effective sliding length of the first slide groove 12.

[0026] This embodiment, by setting a partitioned coating, enables the positioning mechanism 11 to obtain less sliding resistance when moving in the middle region of the first slide 12, thereby improving the smoothness of the bidirectional switching process and reducing the risk of jamming. Simultaneously, an end-damping coating 30 is set at both ends of the first slide 12, so that the positioning mechanism 11 receives appropriate frictional damping when approaching the sliding stop end, thereby reducing end impact and improving the smoothness and positioning stability of the sliding stop process. This partitioned coating structure can meet the needs of smooth sliding in the middle and buffered positioning at the ends without changing the main structure of the slide, which helps to reduce wear, improve the operating feel, and extend the service life of the device.

[0027] Example 3 like Figure 8 As shown, this embodiment of the invention provides a device for bidirectional rotational sliding stop, including a movable plate 1. A central rotating body base 2 is fixedly connected to the upper surface of the movable plate 1 so that the movable plate 1 can rotate relative to the fixed mechanism 37 with the main shaft 9. A movable plate fixing pin 5 is fixedly connected to the upper side of the movable plate 1. A torsion spring 6 is provided on the outer side of the movable plate fixing pin 5. The main shaft 9 is rotatably connected inside the central rotating body base 2. When the movable plate 1 rotates relative to the fixed mechanism 37 and drives the positioning mechanism 11 to move, the torsion spring 6 can apply an elastic force to the movable plate 1.

[0028] The fixing mechanism 37 includes a first fixing mechanism and a second fixing mechanism.

[0029] A positioning mechanism 11 is fixedly connected to the moving plate 1. The positioning mechanism 11 includes a positioning pin cap body 23 and a positioning pin shaft body. Observation holes 21 are symmetrically arranged on both sides of the top of the positioning pin cap body 23. A first elastic material layer 13, a pressure-sensitive color-changing material layer 14, and a second elastic material layer 25 are sequentially arranged below the observation holes 21. Ball bearings 15 are arranged on the side of the second elastic material layer 25 facing the fixing mechanism 37. The second fixed plate mechanism includes a second fixed plate 35, a second slide groove 36, and a variable diameter ball bearing track 16. The second fixed plate mechanism also includes... The system includes a second spindle mounting hole 31, a second fixed plate fixing pin 33, a second fixed plate main fixing hole 32, and a second fixed plate positioning hole 34. A variable diameter ball track 16 is located on the second fixed plate 35. The variable diameter ball track 16 is an arc-shaped track, and the track radius of the variable diameter ball track 16 near both ends of the second slide groove 36 is smaller than the track radius at the middle position. The positioning mechanism 11 is fixedly connected to the moving plate 1 and is set perpendicular to the arc direction of the second slide groove 36, so that the ball 15 can enter and move along the variable diameter ball track 16.

[0030] In this embodiment, the second fixed plate 35, the second slide groove 36, and the variable diameter ball track 16 work together to enable the positioning mechanism 11 to be guided in an arc along the second slide groove 36, while simultaneously allowing the balls 15 to enter and move along the variable diameter ball track 16. Because the radius of the variable diameter ball track 16 is smaller near the two ends of the second slide groove 36 than in the middle, the balls 15 experience gradually increasing resistance as they approach the stopping end, thus reducing the impact upon reaching the end and making the bidirectional rotation stopping process smoother.

[0031] Example 4 A method for achieving bidirectional rotational stopping includes: S1. Fixing a fixing mechanism 37 to the main body of an external device, enabling the main shaft 9 to rotate relative to the fixing mechanism 37, and connecting a movable plate 1 to the main shaft 9, so that the movable plate 1 can rotate with the main shaft 9 relative to the fixing mechanism 37. When the fixing mechanism 37 is a first fixed plate mechanism, the ball 15 moves along the slide table 26 of the limiting mechanism 18 when the positioning mechanism 11 approaches the end of the first slide groove 12, and when the positioning mechanism 11 reaches the end of the first slide groove 12, the ball 15 enters the groove 27 of the limiting mechanism 18 to buffer and assist in positioning the stopping process of the positioning mechanism 11.

[0032] S2. Drive the moving plate 1 to rotate in the first rotation direction or the second rotation direction, so that the positioning mechanism 11 fixed on the moving plate 1 moves along the first slide groove 12 on the fixed mechanism 37, and causes the torsion spring 6 set between the first fixed plate fixing pin 19 and the moving plate fixing pin 5 to undergo elastic deformation.

[0033] S3. When the positioning mechanism 11 moves to one end of the first slide groove 12, the elastic force applied to the moving plate 1 by the torsion spring 6 keeps the positioning mechanism 11 at the corresponding end position of the first slide groove 12, thereby realizing rotational sliding in the first direction or the second direction.

[0034] S4. During the process of the positioning mechanism 11 approaching the end of the first slide groove 12, the ball 15 disposed in the positioning mechanism 11 cooperates with the buffer positioning structure on the fixing mechanism 37 to buffer and assist positioning the sliding stop process of the positioning mechanism 11. The buffer positioning structure is the limiting mechanism 18 disposed at the end of the first slide groove 12.

[0035] S5. When the elastic force of the torsion spring 6 is insufficient to make the ball 15 reach the predetermined positioning position, the ball 15 squeezes the second elastic material layer 25, the pressure-sensitive color-changing material layer 14 and the first elastic material layer 13, causing the pressure-sensitive color-changing material layer 14 to change color, and the state of insufficient elastic force of the torsion spring 6 is displayed through the observation hole 21.

[0036] In this embodiment, the first elastic material layer 13, the pressure-sensitive color-changing material layer 14, the second elastic material layer 25, and the ball 15 inside the positioning mechanism 11 can still provide status indication through the color change of the pressure-sensitive color-changing material layer 14 when the elastic force of the torsion spring 6 is insufficient and the ball 15 cannot reach the predetermined position smoothly. This improves the ease of maintenance, positioning stability, and service life of the device.

[0037] Example 5 A method for achieving bidirectional rotational parking includes: S1. Fix the fixing mechanism 37 to the main body of the external equipment so that the main shaft 9 can rotate relative to the fixing mechanism 37, and connect the moving plate 1 to the main shaft 9 so that the moving plate 1 can rotate with the main shaft 9 relative to the fixing mechanism 37.

[0038] S2. Drive the moving plate 1 to rotate in the first rotation direction or the second rotation direction, so that the positioning mechanism 11 fixed on the moving plate 1 moves along the second slide groove 36 on the fixed mechanism 37, and cause the torsion spring 6 set between the first fixed plate fixing pin 19 and the moving plate fixing pin 5 to undergo elastic deformation.

[0039] S3. When the positioning mechanism 11 moves to one end of the second slide groove 36, the elastic force applied to the moving plate 1 by the torsion spring 6 keeps the positioning mechanism 11 at the corresponding end position of the second slide groove 36, thereby realizing rotational sliding in the first direction or the second direction.

[0040] S4. During the process of the positioning mechanism 11 approaching the end of the second slide 36, the ball 15 disposed in the positioning mechanism 11 cooperates with the buffer positioning structure on the fixing mechanism 37 to buffer and assist positioning during the sliding stop process of the positioning mechanism 11. The buffer positioning structure is a variable diameter ball track 16 disposed on the second fixed plate 35.

[0041] S5. When the elastic force of the torsion spring 6 is insufficient to make the ball 15 reach the predetermined positioning position, the ball 15 squeezes the second elastic material layer 25, the pressure-sensitive color-changing material layer 14, and the first elastic material layer 13, causing the pressure-sensitive color-changing material layer 14 to change color, and the state of insufficient elastic force of the torsion spring 6 is displayed through the observation hole 21. When the fixing mechanism 37 is the second fixed plate mechanism, the ball 15 enters and moves along the variable diameter ball track 16 on the second fixed plate 35. When the ball 15 approaches the two ends of the second slide groove 36, the variable diameter ball track 16 applies resistance to the ball 15 to buffer the sliding stop process of the positioning mechanism 11.

[0042] This embodiment enables the positioning mechanism 11 to reciprocate between two directions and maintain its position at the end through the elastic force of the torsion spring 6, thereby achieving bidirectional rotation and stopping. No electronic or magnetic control components are required; bidirectional rotation, end-stop, and position holding can be achieved purely mechanically. The structural control logic is simple and suitable for mechanical equipment requiring stable bidirectional angle switching.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for achieving bidirectional rotational sliding stop, characterized in that, include: A movable plate (1) is fixedly connected to a central rotating body base (2) on its upper surface. A movable plate fixing pin (5) is fixedly connected to the upper side of the movable plate (1). A torsion spring (6) is provided on the outer side of the movable plate fixing pin (5). A main shaft (9) is rotatably connected inside the central rotating body base (2). The fixing mechanism (37) includes a first fixing plate mechanism and a second fixing plate mechanism; A positioning mechanism (11) is fixedly connected to the moving plate (1). The positioning mechanism (11) includes a positioning pin cap body (23) and a positioning pin shaft body. Observation holes (21) are symmetrically arranged on both sides of the top of the positioning pin cap body (23). A first elastic material layer (13), a pressure-sensitive color-changing material layer (14), and a second elastic material layer (25) are arranged sequentially at the bottom of the observation hole (21). The ball (15) is arranged on the side of the second elastic material layer (25) facing the fixing mechanism (37).

2. The device for achieving bidirectional rotational sliding stop according to claim 1, characterized in that: The first fixed plate mechanism includes a first fixed plate (10), a first slide groove (12), a first spindle mounting hole (24) and a limiting mechanism (18). The limiting mechanism (18) includes a slide table (26), a first fixed plate main fixing hole (22), a groove (27) and a limiting washer (28). The first spindle mounting hole (24) is rotatably connected to the spindle (9). The end of the torsion spring (6) away from the moving plate fixing pin (5) is provided with a first fixed plate fixing pin (19).

3. The device for achieving bidirectional rotational sliding stop according to claim 1, characterized in that: The second fixed plate mechanism includes a second fixed plate (35), a second slide groove (36), and a variable diameter ball track (16). The second fixed plate mechanism also includes a second main shaft mounting hole (31), a second fixed plate fixing pin (33), a second fixed plate main fixing hole (32), and a second fixed plate positioning hole (34). The variable diameter ball track (16) is located on the second fixed plate (35). The variable diameter ball track (16) is an arc-shaped track, and the track radius of the variable diameter ball track (16) at both ends near the second slide groove (36) is smaller than the track radius at the middle position. The positioning mechanism (11) is fixedly connected to the moving plate (1) and is set perpendicular to the arc direction of the second slide groove (36), so that the ball (15) can enter and move along the variable diameter ball track (16).

4. The device for achieving bidirectional rotational sliding stop according to claim 1, characterized in that: The moving plate (1) is provided with a moving plate external connection hole (4) and a positioning mechanism mounting hole (3), and a base pin (20) is fixedly connected to the central rotating body base (2); a central rotating body (7) is fixedly connected to the outside of the main shaft (9), and a main shaft washer (8) is provided between the main shaft (9) and the central rotating body (7).

5. The device for achieving bidirectional rotational sliding stop according to claim 2, characterized in that: The first fixed plate (10) is provided with a first fixed plate positioning hole (17).

6. The device for achieving bidirectional rotational sliding stop according to claim 2, characterized in that: The limiting mechanism (18) is located at both ends of the first slide groove (12). The slide table (26) and the groove (27) are both located on the upper side of the limiting pad (28). The slide table (26) is wedge-shaped and the slide table (26) and the groove (27) are at 120 degrees. When the positioning mechanism (11) reaches the end of the first slide groove (12) and stops, the ball (15) can enter the groove (27).

7. The device for achieving bidirectional rotational sliding stop according to claim 1, characterized in that: The first elastic material layer (13) and the second elastic material layer (25) are made of silicone rubber, and the pressure-sensitive color-changing material layer (14) is a crystal violet lactone microcapsule pressure-sensitive color-changing film.

8. The device for achieving bidirectional rotational sliding stop according to claim 6, characterized in that: The inner surface of the first slide groove (12) is also provided with a partitioned coating. The partitioned coating includes a central guide coating (29) disposed in the middle region of the inner side of the first slide groove (12) and an end damping coating (30) disposed in the two end regions of the inner side of the first slide groove (12). The coating material of the central guide coating (29) is polytetrafluoroethylene, and the coating material of the end damping coating (30) is polyurethane elastomer. The central guide coating (29) accounts for 60% of the effective sliding length of the first slide groove (12), and the end damping coatings (30) each account for 20% of the effective sliding length of the first slide groove (12).

9. A method for achieving bidirectional rotary stop, implemented using the apparatus for achieving bidirectional rotary stop according to any one of claims 1-7, characterized in that, include: S1. Fix the fixing mechanism (37) to the main body of the external equipment so that the main shaft (9) can rotate relative to the fixing mechanism (37), and connect the moving plate (1) to the main shaft (9) so that the moving plate (1) can rotate with the main shaft (9) relative to the fixing mechanism (37); S2. Drive the moving plate (1) to rotate in the first rotation direction or the second rotation direction, so that the positioning mechanism (11) fixed on the moving plate (1) moves along the first slide groove (12) or the second slide groove (36) on the fixed mechanism (37), and cause the torsion spring (6) set between the first fixed plate fixing pin (19) and the moving plate fixing pin (5) to undergo elastic deformation. S3. When the positioning mechanism (11) moves to one end of the first slide (12) or the second slide (36), the elastic force applied to the moving plate (1) by the torsion spring (6) keeps the positioning mechanism (11) at the corresponding end position of the first slide (12) or the second slide (36), thereby realizing rotational sliding in the first direction or the second direction. S4. During the process of the positioning mechanism (11) approaching the end of the first slide (12) or the second slide (36), the ball (15) disposed in the positioning mechanism (11) cooperates with the buffer positioning structure on the fixing mechanism (37) to buffer and assist positioning during the sliding stop process of the positioning mechanism (11). The buffer positioning structure includes a limiting mechanism (18) disposed at the end of the first slide (12) or a variable diameter ball track (16) disposed on the second fixed plate (35). S5. When the elastic force of the torsion spring (6) is insufficient to make the ball (15) reach the predetermined positioning position, the ball (15) squeezes the second elastic material layer (25), the pressure-sensitive color-changing material layer (14) and the first elastic material layer (13), causing the pressure-sensitive color-changing material layer (14) to change color, and the state of insufficient elastic force of the torsion spring (6) is displayed through the observation hole (21).

10. A method for achieving bidirectional rotational stopping according to claim 9, characterized in that: When the fixing mechanism (37) is the first fixed plate mechanism, the ball (15) moves along the slide table (26) of the limiting mechanism (18) when the positioning mechanism (11) approaches the end of the first slide groove (12), and when the positioning mechanism (11) reaches the end of the first slide groove (12) and stops, the ball (15) enters the groove (27) of the limiting mechanism (18) to buffer and assist positioning the stopping process of the positioning mechanism (11).

11. A method for achieving bidirectional rotational stopping according to claim 9, characterized in that: When the fixing mechanism (37) is the second fixed plate mechanism, the ball (15) enters and moves along the variable diameter ball track (16) on the second fixed plate (35). When the ball (15) approaches the two ends of the second slide groove (36), the variable diameter ball track (16) applies resistance to the ball (15) to buffer the sliding stop process of the positioning mechanism (11).

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