Pneumatic actuator of large-torque single-acting cylinder

Abstract

The utility model relates to the technical field of pneumatic actuators, in particular to a pneumatic actuator of a large-torque single-acting cylinder, which comprises a cylinder component, a driving component and a spring component, the spring component comprises a spring barrel, a spring seat, a spring, a spring damper, a spring pressing sheet and a spring rod, and the spring barrel is arranged on the driving component. The spring seat is arranged at the end, away from the driving assembly, of the spring barrel, the spring pressing piece is slidably connected into the spring barrel, the spring damper is arranged in the spring barrel, one end of the spring damper is arranged on the spring seat, the other end of the spring damper is fixedly connected with the spring pressing piece, and the spring is arranged on the spring damper in a sleeving mode. One end of the spring is fixedly connected with the spring seat, the other end of the spring abuts against the spring pressing piece, one end of the spring rod is in transmission connection with the air cylinder assembly, and the other end of the spring rod penetrates through the driving assembly and the spring barrel to be fixedly connected with the spring pressing piece. And the compression deformation phenomenon of the spring in use is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of single-acting cylinder pneumatic actuators, and in particular to a high-torque single-acting cylinder pneumatic actuator. Background Art

[0002] High-torque single-acting cylinder pneumatic actuators generally refer to single-acting pneumatic actuators designed to provide high torque output. Single-acting pneumatic actuators require air pressure in only one direction to drive, and rely on springs or other reset mechanisms to complete the action when returning to the position. This type of actuator is particularly suitable for occasions where large torque is required to drive valves and other equipment.

[0003] Currently, a Chinese utility model patent application with publication number CN 221547917U, published on August 16, 2024, provides a pneumatic actuator for a high-torque single-acting cylinder, comprising a cylinder module, a torque module, and a spring module. The cylinder module and the spring module are respectively connected to either side of the torque module by fasteners. The torque module includes a housing, a rotating cylinder rotatably connected to the housing for connecting to the valve stem, and a fork mechanism disposed on the rotating cylinder. The telescopic drive rod of the cylinder module and the telescopic reset rod of the spring module are respectively connected to the fork mechanism. The cylinder module includes a cylinder connected to a compressed gas generating structure, a piston slidably connected to the cylinder, and a telescopic drive rod connected to the piston through an inner cover of the cylinder. A positioning guide structure is provided between the piston and the cylinder, and a detachable fixing structure is provided between the piston and the telescopic drive rod. This achieves the effect of positioning the piston, preventing it from flipping, and increasing the torque.

[0004] In the related art, the pneumatic actuator with a large torque single-acting cylinder is prone to deformation and vibration during the long-term compression and reset process of the pneumatic actuator. The spring is prone to compression deformation, displacement and jamming during long-term use.

[0005] Therefore, it is necessary to provide a pneumatic actuator with a large torque single-acting cylinder to solve the above problems. Utility Model Content

[0006] In order to improve the problem that the spring is easily deformed and vibrated during long-term compression and resetting during the use of the pneumatic actuator, and the spring is easily stuck due to compression deformation, displacement and other problems during long-term use, an embodiment of the present application provides a pneumatic actuator with a large torque single-acting cylinder, including a cylinder assembly, a drive assembly and a spring assembly, wherein the cylinder assembly, the drive assembly and the spring assembly are fixedly connected in sequence, and the spring assembly includes a spring barrel, a spring seat, a spring, a spring damper, a spring pressing piece and a spring rod, wherein the spring barrel is arranged on the drive assembly, the spring seat is arranged on the end of the spring barrel away from the drive assembly, the spring pressing piece is slidably connected to the inside of the spring barrel, the spring damper is arranged inside the spring barrel, and one end of the spring damper is arranged on the spring seat, and the other end of the spring damper is fixedly connected to the spring pressing piece, the spring is sleeved on the spring damper, and one end of the spring is fixedly connected to the spring seat, and the other end of the spring abuts against the spring pressing piece, one end of the spring rod is transmission-connected to the cylinder assembly, and the other end of the spring rod passes through the drive assembly and the spring barrel and is fixedly connected to the spring pressing piece.

[0007] The pneumatic actuator of the high-torque single-acting cylinder provided in the embodiment of the present application can press the spring pressure plate through the spring rod when the pneumatic actuator of the single-acting cylinder is started. The spring pressure plate is subjected to force to press the spring, and the spring retracts, and at the same time presses the spring damper, and the spring damper retracts. The spring damper reduces the deformation of the spring during long-term compression and reset, and the frequency of vibration, and reduces the probability of the spring being stuck due to compression deformation, displacement and jamming during long-term use. When the spring resets, the spring pushes the spring pressure plate to reset, and the spring damper follows the reset, reducing the probability of the spring vibrating.

[0008] The above-mentioned technical solution in the embodiment of the present application has at least the following technical effects: when starting the pneumatic actuator of the single-acting cylinder, the spring damper in the spring assembly is used to reduce the deformation of the spring during the long-term compression and reset process, as well as the frequency of vibration, thereby reducing the probability of the spring being stuck due to compression deformation and displacement during long-term use.

[0009] In some embodiments, the drive assembly includes a housing, a shift fork, and a rotating shaft. The housing is arranged on the spring barrel, the rotating shaft is rotatably connected to the inside of the housing, the shift fork is arranged on the rotating shaft, a sliding hole is provided on the shift fork, a protrusion is provided on the spring rod, and the protrusion is slidably connected to the sliding hole, and the end of the spring rod away from the spring barrel passes through the housing and is transmission-connected to the cylinder assembly.

[0010] In some embodiments, the cylinder assembly includes a cylinder body, a piston and a piston rod. The cylinder body is set on the box body, the piston is slidably connected inside the box body, one end of the piston rod is set on the piston, and the other end of the piston rod passes through the cylinder body and is coaxially connected to the spring rod.

[0011] In some embodiments, a positioning rod is provided on the box body, a connecting piece is provided on the spring rod, and the other end of the connecting piece is slidably provided on the positioning rod.

[0012] In some embodiments, a groove is formed on the piston, and a sealing ring is provided in the groove.

[0013] In some embodiments, one end of the rotating shaft away from the shift fork is coaxially connected to the transmission shaft.

[0014] In some embodiments, a plurality of reinforcing ribs are provided on a side of the cylinder away from the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a pneumatic actuator with a high-torque single-acting cylinder provided in an embodiment of the present application;

[0017] Figure 2 A schematic cross-sectional view of a pneumatic actuator with a high-torque single-acting cylinder provided in an embodiment of the present application;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 Schematic diagram of the exploded structure of the pneumatic actuator with a high-torque single-acting cylinder provided in an embodiment of the present application.

[0020] Among them, the reference numerals in the figures are:

[0021] 1. Spring assembly; 11. Spring tube; 12. Spring seat; 13. Spring; 14. Spring damper; 15. Spring pressure plate; 16. Spring rod; 2. Drive assembly; 21. Rotating shaft; 22. Housing; 23. Shift fork; 24. Connector; 25. Positioning rod; 26. Drive shaft; 27. Protrusion; 28. Slide hole; 3. Cylinder assembly; 31. Cylinder body; 32. Piston; 33. Piston rod; 34. Sealing ring; 35. Reinforcement rib. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusions.

[0024] In order to improve the problems in the related art that during the use of pneumatic actuators, the spring is prone to deformation and vibration during long-term compression and resetting, and the spring is prone to compression deformation, displacement and jamming during long-term use, the embodiments of the present application provide the following solutions.

[0025] Please also refer to Figures 1 to 4 An embodiment of the present application provides a pneumatic actuator with a large torque single-acting cylinder. The pneumatic actuator with a large torque single-acting cylinder includes a cylinder assembly 3, a drive assembly 2, and a spring assembly 1. The cylinder assembly 3 is arranged on the drive assembly 2, and the spring assembly 1 is arranged on the drive assembly 2.

[0026] In some embodiments, please refer to Figures 1 to 3 The spring assembly 1 includes a spring barrel 11, a spring seat 12, a spring 13, a spring damper 14, a spring pressing piece 15 and a spring rod 16. The spring 13 barrel is arranged on the driving assembly 2, the spring seat 12 is arranged on the end of the spring 13 barrel away from the driving assembly 2, the spring pressing piece 15 is slidably connected to the inside of the spring barrel 11, the spring damper 14 is arranged inside the spring barrel 11, and one end of the spring damper 14 is arranged on the spring seat 12, the other end of the spring damper 14 is fixedly connected to the spring pressing piece 15, the spring 13 is sleeved on the spring damper 14, and one end of the spring 13 is fixedly connected to the spring seat 12, the other end of the spring 13 abuts against the spring pressing piece 15, one end of the spring rod 16 is transmission connected to the cylinder assembly 3, and the other end of the spring rod 16 passes through the driving assembly 2 and the spring 13 barrel and is fixedly connected to the spring pressing piece 15.

[0027] With such arrangement, the pneumatic actuator of the high-torque single-acting cylinder can start the pneumatic actuator of the single-acting cylinder. The air intake of the cylinder assembly 3 pushes the spring rod 16, and the spring rod 16 pushes the spring rod 16 to displace, and the spring pressing plate 15 is pressed by the spring rod 16. The spring pressing plate 15 is subjected to force to press the spring 13, and the spring 13 retracts, and at the same time presses the spring damper 14, and the spring damper 14 retracts. The spring damper 14 reduces the deformation of the spring 13 during the long-term compression and reset process, and the frequency of vibration, and reduces the probability of the spring 13 being stuck due to compression deformation and displacement during long-term use. When the spring 13 resets, the spring 13 pushes the spring pressing plate 15 to reset, and the spring damper 14 follows the reset, reducing the probability of the spring 13 vibrating.

[0028] In some embodiments, please refer to Figure 4 The driving assembly 2 includes a box body 22, a shift fork 23 and a rotating shaft 21. The box body 22 is arranged on the spring cylinder 11, and the rotating shaft 21 is rotatably connected to the inside of the box body 22. The shift fork 23 is arranged on the rotating shaft 21. A sliding hole 28 is opened on the shift fork 23. A protrusion 27 is provided on the spring rod 16. The protrusion 27 is slidably connected to the sliding hole 28. The end of the spring rod 16 away from the spring cylinder 11 passes through the box body 22 and is transmission-connected to the cylinder assembly 3. A positioning rod 25 is provided on the box body 22, and a connecting member 24 is provided on the spring rod 16. The other end of the connecting member 24 is slidably arranged on the positioning rod 25. The end of the rotating shaft 21 away from the shift fork 23 is coaxially connected to the transmission shaft 26.

[0029] With such arrangement, when the cylinder assembly 3 is inhaled, it drives the spring rod 16 to move, and at the same time, the spring rod 16 drives the shift fork 23 to rotate. The shift fork 23 is arranged on the rotating shaft 21. At the same time, the shift fork 23 drives the rotating shaft 21 to rotate, and the end of the transmission shaft 26 close to the box body 22 is sleeved on the rotating shaft 21. The rotating shaft 21 drives the transmission shaft 26 to rotate. A positioning rod 25 is provided on the box body 22, and the positioning rod 25 is connected to the spring rod 16 through a connecting piece 24, thereby reducing the probability of the spring rod 16 being offset when moving.

[0030] In some embodiments, please refer to Figures 1 to 3 The cylinder assembly 3 includes a cylinder body 31, a piston 32 and a piston rod 33. The cylinder body 31 is arranged on the box body 22, and the piston 32 is slidably connected to the inside of the box body 22. One end of the piston rod 33 is arranged on the piston 32, and the other end of the piston rod 33 passes through the cylinder body 31 and is coaxially connected to the spring rod 16. A groove is provided on the piston 32, and a sealing ring 34 is provided in the groove. A plurality of reinforcing ribs 35 are provided on the side of the cylinder body 31 away from the piston 32.

[0031] With such a configuration, during the use of the pneumatic actuator of the high-torque single-acting cylinder, the air inlet valve is first opened, and the compressed air enters one side of the cylinder body 31 through the air inlet, pushing the piston 32 forward and driving the spring rod 16 to transmit coaxially. A sealing ring 34 is provided on the piston 32, and the sealing ring 34 can effectively prevent the compressed air inside the cylinder from leaking out from the gap between the piston 32 and the cylinder wall. At the same time, a plurality of reinforcing ribs 35 are provided on the surface of the cylinder body 31 to reduce the deformation problem caused by excessive pressure inside the cylinder body 31.

[0032] The implementation principle of the pneumatic actuator of the high-torque single-acting cylinder in the embodiment of the present application is as follows: during the use of the pneumatic actuator of the high-torque single-acting cylinder, the air inlet valve is first opened, and the compressed air enters one side of the cylinder body 31 through the air inlet, pushing the piston 32 forward, and at the same time, the piston rod 33 pushes the spring rod 16 to move. A sealing ring 34 is provided on the piston 32, and the sealing ring 34 can effectively prevent the compressed air inside the cylinder from leaking out from the gap between the piston 32 and the cylinder wall. At the same time, a plurality of reinforcing ribs 35 are provided on the surface of the cylinder body 31 to reduce the deformation problem caused by excessive pressure inside the cylinder body 31. At the same time, when the spring rod 16 moves, it drives the shift fork 23 to rotate. The shift fork 23 is set on the rotating shaft 21. At the same time, the shift fork 23 drives the rotating shaft 21 to rotate, and the end of the transmission shaft 26 close to the box body 22 is sleeved on the rotating shaft On the moving shaft 21, the rotating shaft 21 drives the transmission shaft 26 to rotate, and a positioning rod 25 is provided on the box body 22. The positioning rod 25 is connected to the spring rod 16 through a connecting piece 24, and at the same time reduces the probability of the spring rod 16 deflecting when moving. When the spring rod 16 moves, the spring pressing piece 15 is pressed by the spring rod 16, and the spring pressing piece 15 is forced to press the spring 13, and the spring 13 retracts and presses the spring damper 14 at the same time. The spring damper 14 retracts, and the spring damper 14 reduces the deformation of the spring 13 during the long-term compression and reset process, as well as the frequency of vibration, and reduces the probability of the spring 13 being stuck due to compression deformation during long-term use. When the spring 13 resets, the spring 13 pushes the spring pressing piece 15 to reset, and the spring damper 14 follows the reset, reducing the probability of the spring 13 vibrating.

[0033] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. High torque single-acting cylinder pneumatic actuator, characterized by: The invention comprises a cylinder assembly (3), a driving assembly (2) and a spring assembly (1), wherein the cylinder assembly (3), the driving assembly (2) and the spring assembly (1) are fixedly connected in sequence, and the spring assembly (1) comprises a spring barrel (11), a spring seat (12), a spring (13), a spring damper (14), a spring pressing piece (15) and a spring rod (16), wherein the spring barrel (13) is arranged on the driving assembly (2), the spring seat (12) is arranged on an end of the spring barrel (13) away from the driving assembly (2), the spring pressing piece (15) is slidably connected to the inside of the spring barrel (11), and the spring damper (14) is arranged The invention relates to a spring cylinder (11), wherein one end of the spring damper (14) is arranged on the spring seat (12), and the other end of the spring damper (14) is fixedly connected to the spring pressing piece (15). The spring (13) is sleeved on the spring damper (14), and one end of the spring (13) is fixedly connected to the spring seat (12), and the other end of the spring (13) abuts against the spring pressing piece (15). One end of the spring rod (16) is transmission-connected to the cylinder assembly (3), and the other end of the spring rod (16) passes through the drive assembly (2) and the spring (13) barrel and is fixedly connected to the spring pressing piece (15).

2. The high-torque single-acting cylinder pneumatic actuator according to claim 1, characterized in that: The driving assembly (2) comprises a housing (22), a shift fork (23) and a rotating shaft (21); the housing (22) is arranged on the spring barrel (11); the rotating shaft (21) is rotatably connected to the interior of the housing (22); the shift fork (23) is arranged on the rotating shaft (21); a sliding hole (28) is provided on the shift fork (23); a protrusion (27) is provided on the spring rod (16); the protrusion (27) is slidably connected to the sliding hole (28); an end of the spring rod (16) away from the spring barrel (11) passes through the housing (22) and is transmission-connected to the cylinder assembly (3).

3. The high-torque single-acting cylinder pneumatic actuator according to claim 2, characterized in that: The cylinder assembly (3) comprises a cylinder body (31), a piston (32) and a piston rod (33); the cylinder body (31) is arranged on a box body (22); the piston (32) is slidably connected inside the cylinder body (31); one end of the piston rod (33) is arranged on the piston (32); the other end of the piston rod (33) passes through the cylinder body (31) and is coaxially connected to the spring rod (16).

4. The high-torque single-acting cylinder pneumatic actuator according to claim 3, characterized in that: A positioning rod (25) is provided on the box body (22), a connecting piece (24) is provided on the spring rod (16), and the other end of the connecting piece (24) is slidably provided on the positioning rod (25).

5. The high-torque single-acting cylinder pneumatic actuator according to claim 4, characterized in that: A groove is formed on the piston (32), and a sealing ring (34) is arranged in the groove.

6. The high-torque single-acting cylinder pneumatic actuator according to claim 5, characterized in that: One end of the rotating shaft (21) away from the shift fork (23) is coaxially connected to a transmission shaft (26).

7. The high-torque single-acting cylinder pneumatic actuator according to claim 6, characterized in that: A plurality of reinforcing ribs (35) are provided on a side of the cylinder body (31) away from the piston (32).

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