A pneumatic rack stop mechanism

Abstract

The utility model relates to a kind of pneumatic rack rotation-stopping mechanism, it is installed below rotating gear, including mounting seat, connecting rod base, rotation-stopping swing arm, cylinder and connecting rod;Mounting seat is fixed with interval with connecting rod base, and the upper portion of mounting seat is rotatably connected with the one end of rotation-stopping swing arm by swing arm pivot I, and V-shaped connecting rod mechanism is hinged between the other end of rotation-stopping swing arm and connecting rod base, rack, same with the modulus of rotating gear and can be engaged with rotating gear is installed on rotation-stopping swing arm, the lower portion of mounting seat is rotatably connected with the rear seat of cylinder by cylinder rear axle, and the end of piston rod of cylinder is hinged with the middle part of V-shaped connecting rod mechanism by fish eye joint.The utility model can utilize cylinder to drive rotation-stopping swing arm swing to make rack and rotating gear engage to realize the rotation-stopping of rotating gear, accurate positioning, easy operation, long service life.

Description

Technical Field

[0001] This utility model relates to an anti-rotation mechanism, specifically a pneumatic rack and pinion anti-rotation mechanism. Background Technology

[0002] Rack and pinion drives convert the rotary motion of gears into the reciprocating linear motion of racks, or vice versa. Gear drives are one of the most widely used transmission structures, offering advantages such as long service life, smooth operation, and high reliability. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a pneumatic rack and pinion anti-rotation mechanism. It utilizes the meshing of a rack and pinion to stop the rotation of a rotating gear. This mechanism is not only simple in structure, stable in operation, and highly reliable, but also features precise positioning of the rack and pinion, impact resistance, easy lubrication, and a long service life.

[0004] This utility model is achieved through the following technical solution:

[0005] A pneumatic rack and pinion anti-rotation mechanism is provided, which is installed below a rotating gear and includes a mounting base, a connecting rod base, an anti-rotation swing arm, a cylinder, and a connecting rod. The mounting base and the connecting rod base are fixed at a distance. The upper part of the mounting base is rotatably connected to one end of the anti-rotation swing arm through a swing arm pivot I. The other end of the anti-rotation swing arm is hinged to the connecting rod base by a V-shaped connecting rod mechanism. A rack with the same module as the rotating gear and capable of meshing with the rotating gear is installed on the anti-rotation swing arm. The lower part of the mounting base is rotatably connected to the rear seat of the cylinder through the rear shaft of the cylinder. The piston rod end of the cylinder is hinged to the middle part of the V-shaped connecting rod mechanism through a fisheye joint.

[0006] This solution utilizes the piston rod of a cylinder to drive a connecting rod mechanism, which in turn causes the anti-rotation swing arm to swing, causing the rack on the anti-rotation swing arm to rise and mesh with the rotating gear, thereby stopping the rotation of the rotating gear. It features precise positioning, impact resistance, easy lubrication, and long service life.

[0007] Furthermore, the V-shaped linkage mechanism includes two support links I and one support link II. The two support links I are rotatably connected to the other two ends of the anti-rotation swing arm via the swing arm pivot II. The other ends of the two support links I are rotatably connected to one end of the support link II via the link pivot II. The other end of the support link II is rotatably connected to the link base via the link pivot I.

[0008] The upper part of the linkage mechanism consists of two supporting links I, which are respectively connected to the link shaft II and the swing arm shaft II to form a parallelogram linkage mechanism. Compared with the single link structure, it is more reliable. This planar linkage mechanism is a lower pair mechanism. The kinematic pairs are in surface contact, which has a large load-bearing capacity, is impact-resistant, easy to manufacture, easy to lubricate, and has low wear.

[0009] Furthermore, the fisheye joint is rotatably mounted on one end of the connecting rod shaft II.

[0010] The fisheye joint is rotatably sleeved on one end of the connecting rod shaft II, which enables the piston rod of the cylinder to apply force to the connecting rod mechanism, thereby driving the anti-rotation swing arm to rotate.

[0011] Furthermore, a support plate is laterally fixed in the middle of the mounting base on one side of the cylinder, and a limiting post is connected to the end of the support plate to abut against the support link II.

[0012] A support plate is provided in the middle of the mounting base, and a limiting post is provided at the end of the support plate that can abut against the support link II. The limiting post can mechanically prevent the link mechanism from retracting, ensuring that the cylinder is in the retracted position.

[0013] Furthermore, the end of the support plate is vertically connected to the fixing plate, and the limiting post is a bolt post with one end vertically penetrating through the fixing plate. Adjusting nuts are bolted to the front and back of the fixing plate respectively.

[0014] The end of the support plate is vertically connected to the fixed plate. A threaded post is set on the fixed plate. The threaded post and the adjusting nut can be used to adjust its extension length on the fixed plate, which facilitates the adjustment of the distance with the linkage mechanism. By adjusting its position, mechanical anti-reverse mechanism can be better achieved.

[0015] Furthermore, the end of the anti-rotation swing arm near the support link I has a recessed mounting groove on its upper surface to accommodate the rack. The bottom surface of the mounting groove has bolt holes for fixing the rack. Fixing blocks are bolted to both ends of the rack on the bottom surface of the mounting groove. Positioning bolts are connected through the two fixing blocks on the side facing the rack. The threaded head of the positioning bolt abuts against the rack. A lock nut is threaded onto one side of the positioning bolt.

[0016] The top of the anti-rotation swing arm has a mounting groove, and the rack is installed in the mounting groove. The rack can be adjusted in position within the mounting groove and tightened by positioning bolts on both sides and locking bolts. This allows for easy adjustment of the rack's position, enabling it to better mesh with the rotating gear to ensure the anti-rotation effect.

[0017] The beneficial effects of this utility model are:

[0018] This invention uses a cylinder as its actuation mechanism, which, in conjunction with a linkage mechanism, drives an anti-rotation swing arm to swing. This, in turn, causes a rack and pinion to mesh with a rotating gear, thus achieving the desired structural limit and preventing deviation or misoperation and other dangerous incidents. The use of a rack and pinion meshing method ensures the rack and pinion remain stationary, and the identical module between them effectively guarantees meshing accuracy, impact resistance, long service life, stable operation, and high reliability.

[0019] This invention uses a cylinder as the actuation source to control the rack's up-and-down offset and mesh with the rotating gear to stop rotation. Compared with hydraulic devices, this avoids oil leakage and oil pollution, effectively improving overall safety.

[0020] The anti-rotation swing arm is a parallelogram linkage mechanism formed by two supporting connecting rods I. It has a reliable structure, belongs to the lower pair mechanism, the kinematic pair is surface contact, has a large load-bearing capacity, is impact-resistant, easy to manufacture, easy to lubricate, and has low wear. It can be effectively matched with the cylinder to realize the meshing and anti-rotation of the rack and pinion. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure and installation of this utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of the stop mechanism of this utility model.

[0023] Figure 3 This is a rear view of the anti-rotation mechanism of this utility model.

[0024] Figure 4 This is a schematic diagram of the mechanical anti-rotation operation of this utility model.

[0025] As shown in the figure:

[0026] 1. Mounting base, 2. Anti-rotation swing arm, 3. Support link I, 4. Support link II, 5. Linkage base, 6. Cylinder, 7. Cylinder rear axle, 8. Swing arm pivot I, 9. Swing arm pivot II, 10. Linkage pivot I, 11. Linkage pivot II, 12. Rotating gear, 13. Fixing block, 14. Rack, 15. Fisheye connector, 16. Support plate, 17. Limiting post, 18. Fixing plate, 19. Adjusting nut, 20. Mounting slot, 21. Positioning bolt, 22. Locking nut. Detailed Implementation

[0027] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0028] A pneumatic rack and pinion anti-rotation mechanism is installed below a rotating gear and includes a mounting base 1, a connecting rod base 5, an anti-rotation swing arm 2, a cylinder 6, and a connecting rod. The mounting base 1 and the connecting rod base 5 are fixed at intervals. The upper part of the mounting base 1 is rotatably connected to one end of the anti-rotation swing arm 2 through a swing arm pivot 18. The other end of the anti-rotation swing arm 2 is hinged to the connecting rod base 5 with a V-shaped connecting rod mechanism. A rack 14 with the same module as the rotating gear 12 and capable of meshing with the rotating gear 12 is installed on the anti-rotation swing arm 2. The lower part of the mounting base 1 is rotatably connected to the rear seat of the cylinder 6 through a cylinder rear shaft 7. The piston rod end of the cylinder 6 is hinged to the middle part of the V-shaped connecting rod mechanism through a fisheye joint 15. The anti-rotation swing arm 2 has a recessed mounting groove 20 on its upper surface near the support link I3 to accommodate the rack 14. The bottom surface of the mounting groove 20 has bolt holes for fixing the rack 14. Fixing blocks 13 are bolted to both ends of the rack 14 on the bottom surface of the mounting groove 20. The two fixing blocks 13 are connected to the side of the rack 14 facing the rack 14 by positioning bolts 21. The threaded head of the positioning bolt 21 abuts against the rack 14. A locking nut 22 is threadedly connected to one side of the fixing block 13 of the positioning bolt 21.

[0029] The V-shaped linkage mechanism includes two supporting links I3 and one supporting link II4. One end of each supporting link I3 is rotatably connected to the other two ends of the anti-rotation swing arm 2 via a swing arm pivot II9. The other end of each supporting link I3 is rotatably connected to one end of supporting link II4 via a link pivot II11. The other end of supporting link II4 is rotatably connected to the link base 5 via a link pivot I10. A fisheye connector 15 is rotatably fitted onto one end of the link pivot II11.

[0030] To achieve mechanical limiting of the anti-rotation mechanism and ensure safety, a support plate 16 is laterally fixed to the middle of the mounting base 1 on one side of the cylinder 6. A limiting post 17, which abuts against the support connecting rod II4, is connected to the end of the support plate 16. A fixed plate 18 is vertically connected to the end of the support plate 16. The limiting post 17 is a bolt post, with one end vertically penetrating the fixed plate 18. Adjusting nuts 19 are bolted to the front and rear of the fixed plate 18, respectively. The length of the bolt post is adjusted by the threaded connection between it and the fixed plate 18, and locked in place with the adjusting nuts 19. This allows for easy adjustment to a suitable position to ensure the mechanical limiting effect.

[0031] The working process of this utility model:

[0032] When it is necessary to stop the rotation of the upper rotating gear 12, such as Figure 1 and Figure 2As shown, the piston rod of cylinder 6 is pulled back, which in turn pulls the connecting rod shaft II11 through the fisheye joint 15, causing the connecting rod mechanism to deform. This, in turn, drives the anti-rotation swing arm 2 to rotate clockwise around the swing arm shaft I8 through the support connecting rod I3. This causes the rack 14 to move upward and mesh with the rotating gear 12 above for accurate positioning. The rack 14 can be used to stop the rotation of the rotating gear 12. The entire structure is placed below the rotating gear 12, which has a high space utilization rate. The meshing and positioning of the rotating gear 12 and the rack 14 are accurate. The limiting post 17 at the end of the support plate 16 in the middle of the mounting base 1 acts as a mechanical anti-reverse mechanism and can abut against the support connecting rod II4. With the action of cylinder 6, the support connecting rod I3 can smoothly drive the anti-rotation swing arm 2 to swing, thereby driving the rack 14 to stop rotation.

[0033] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A pneumatic rack and pinion anti-rotation mechanism, installed below a rotating gear, characterized in that: It includes a mounting base, a connecting rod base, an anti-rotation swing arm, a cylinder, and a connecting rod. The mounting base and the connecting rod base are fixed at a distance. The upper part of the mounting base is rotatably connected to one end of the anti-rotation swing arm through the swing arm pivot I. The other end of the anti-rotation swing arm is hinged to the connecting rod base by a V-shaped connecting rod mechanism. A rack with the same module as the rotating gear and capable of meshing with the rotating gear is mounted on the anti-rotation swing arm. The lower part of the mounting base is rotatably connected to the rear seat of the cylinder through the rear axle of the cylinder. The end of the piston rod of the cylinder is hinged to the middle of the V-shaped connecting rod mechanism through a fisheye joint.

2. The pneumatic rack anti-rotation mechanism according to claim 1, characterized in that: The V-shaped linkage mechanism includes two support links I and one support link II. The two support links I are rotatably connected to the other two ends of the anti-rotation swing arm via the swing arm pivot II. The other ends of the two support links I are rotatably connected to one end of the support link II via the link pivot II. The other end of the support link II is rotatably connected to the link base via the link pivot I.

3. The pneumatic rack anti-rotation mechanism according to claim 1, characterized in that: The fisheye joint is rotatably mounted on one end of the connecting rod shaft II.

4. The pneumatic rack anti-rotation mechanism according to claim 1, characterized in that: A support plate is also horizontally fixed in the middle of the mounting base on one side of the cylinder, and a limiting post is connected to the end of the support plate that can abut against the support link II.

5. The pneumatic rack anti-rotation mechanism according to claim 4, characterized in that: The end of the support plate is vertically connected to the fixing plate. The limiting post is a bolt post, one end of which penetrates vertically through the fixing plate, and adjusting nuts are bolted to the front and back of the fixing plate respectively.

6. The pneumatic rack anti-rotation mechanism according to claim 1, characterized in that: The anti-rotation swing arm has a recessed mounting groove on its upper surface near the support link I to accommodate the rack. The bottom surface of the mounting groove has bolt holes for fixing the rack. Fixing blocks are bolted to both ends of the rack on the bottom surface of the mounting groove. Positioning bolts are connected through the two fixing blocks on the side facing the rack. The threaded head of the positioning bolt abuts against the rack. A lock nut is threaded onto one side of the positioning bolt.

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