High-frequency angular travel executing device

Abstract

The utility model relates to a high-frequency angular travel executing device which comprises a cylinder body and a reset assembly, the reset assembly is fixedly installed below the cylinder body and comprises a shell, the shell is connected with the cylinder body through a first connecting piece, a traction shaft capable of being matched with a main shaft is arranged in the shell, and a coil spring is arranged on the outer side of the traction shaft. And one end of the coil spring is clamped in the traction shaft, and the other end of the coil spring is connected with the shell. According to the utility model, the installation space of the actuating mechanism is greatly reduced; through the cooperation of the guide plate and the guide groove and the cooperation between the shifting fork sets on the two pistons, the action of the executing mechanism is stable and reliable, and the service life is greatly prolonged; the coil spring is simple in structural form and convenient to install, and compared with a common compression spring, the coil spring is high in force transmission efficiency in torque motion, the motion loss of the high-frequency rapid executing mechanism with the reset function is well reduced, and the service life of the executing mechanism is greatly prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic actuator technology and relates to a high-frequency angular stroke actuator. Background Technology

[0002] Valves are widely used in various industries. The operating conditions in different industries and devices are different. In some operating conditions, valves are required to meet the requirements of fast action and long service life under high-frequency operation, and to easily achieve automatic closing or opening in case of failure. Therefore, a high-frequency, fast-acting pneumatic actuator with spring return and long service life is needed as a valve driving device.

[0003] In practical applications, the stability of most pneumatic actuators decreases significantly under high-frequency, rapid operation, leading to a substantial reduction in their service life. Adding the requirement for spring return further exacerbates this issue, impacting not only the actuator's stability but also significantly increasing the lifespan requirements of the springs themselves. Conventional compression springs, with their long preload and stroke, are prone to permanent plastic deformation under prolonged high-frequency, rapid operation, resulting in reduced operational stability and a significantly shortened lifespan. Furthermore, their bulky size can prevent proper installation under certain special operating conditions, failing to fully meet customer needs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a high-frequency angular stroke actuator.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A high-frequency angular stroke actuator, comprising:

[0007] The cylinder body has a main shaft rotatably mounted in the middle, and pistons are respectively mounted inside the cylinder body on both sides of the main shaft; each of the two pistons is equipped with a shift fork assembly, which includes two first forks and two second forks arranged in parallel, with a pin between the two second forks, and rollers are respectively mounted on the pin;

[0008] The shift block is fixedly installed in the middle of the main shaft, and the shift block has grooves on both sides that can cooperate with the rollers.

[0009] A reset assembly is fixedly installed on the underside of the cylinder body. The reset assembly includes a housing, which is connected to the cylinder body by a first connector. A traction shaft that can cooperate with the main shaft is provided inside the housing. A coil spring is provided on the outside of the traction shaft. One end of the coil spring is locked inside the traction shaft, and the other end of the coil spring is connected to the housing.

[0010] Preferably, the main shaft has a prism section in the middle, and the paddle block has a polygonal hole in the middle that can cooperate with the prism section; the upper section of the main shaft has a positioning sleeve for fixing the paddle block, and the upper end of the main shaft has a shaft retaining ring for fixing the positioning sleeve.

[0011] Preferably, the second fork is provided with mounting holes, and retaining rings for fixing the pins are provided in the mounting holes.

[0012] Preferably, a pad is provided between the upper and lower ends of the roller and the second fork.

[0013] Preferably, the traction shaft has a fixing hole, and one end of the coil spring is provided with a bent insert plate that can cooperate with the fixing hole; a protective shell is provided inside the housing, and the other end of the coil spring is connected to the protective shell by a fixing bolt.

[0014] Preferably, the housing includes an upper shell and a lower shell, which are connected by a second connector.

[0015] Preferably, the main shaft and the traction shaft are respectively provided with square holes and square posts that can cooperate with each other.

[0016] Preferably, a protective sleeve is provided on the outer side of the traction shaft, and a clearance hole corresponding to the fixing hole is provided on the protective sleeve.

[0017] Preferably, the first fork and the second fork are respectively provided with guide grooves, and the inner sidewall of the cylinder is provided with a guide plate that can cooperate with the guide grooves.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] This invention significantly reduces the installation space of the actuator; through the cooperation between the guide plate and the guide groove, and the cooperation between the shift forks on the two pistons, the actuator operates smoothly and reliably, and its service life is greatly extended; the coil spring has a simple structure and is easy to install, and compared with ordinary compression springs, it has high force transmission efficiency in torque motion, which greatly reduces the motion loss of high-frequency fast actuators with reset function and greatly improves the service life of the actuator; this actuator not only has a small installation space, complete functions, and simple switching, but also greatly improves the smoothness of the actuator and valve operation and service life. Attached Figure Description

[0020] Figure 1 This is a front sectional view of the present invention.

[0021] Figure 2 This is a schematic diagram of the left cross-section of this utility model.

[0022] Figure 3This is a schematic diagram of the internal structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the lever structure of this utility model.

[0024] In the diagram: 1. Cylinder block; 2. Main shaft; 3. Piston; 4. Shift fork assembly; 5. First fork rod; 6. Second fork rod; 7. Pin; 8. Roller; 9. Shift block; 10. Slot; 11. Housing; 12. First connecting piece; 13. Traction shaft; 14. Coil spring; 15. Prismatic segment; 16. Polygonal hole; 17. Positioning sleeve; 18. Shaft retaining ring; 19. Mounting hole; 20. Hole retaining ring; 21. Protective shell; 22. Gasket; 23. Fixing hole; 24. Bending insert plate; 25. Upper shell; 26. Lower shell; 27. Second connecting piece; 28. Square hole; 29. ​​Square post; 30. Protective sleeve; 31. Clearance hole; 32. Guide groove; 33. Guide plate. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] This embodiment proposes a high-frequency angular stroke actuator, including a cylinder 1, a main shaft 2, a piston 3, a shift fork assembly 4, a shift block 9, and a reset assembly. When the piston 3 moves in the cylinder 1, it can drive the main shaft 2 to rotate through the cooperation of the shift fork assembly 4 and the shift block 9. The reset assembly can quickly reset the main shaft.

[0027] like Figures 1-4 As shown, a main shaft 2 is rotatably mounted in the middle of the cylinder body 1, and pistons 3 are respectively mounted inside the cylinder body 1 on both sides of the main shaft 2. The pistons 3 can reciprocate inside the cylinder body 1.

[0028] Each of the two pistons 3 is provided with a fork assembly 4. The fork assembly 4 includes two first forks 5 and two second forks 6 arranged in parallel. The fork assembly 4 of one piston 3 can cooperate with the fork assembly 4 of the other piston 3.

[0029] A pin 7 is provided between the two second forks 6, and rollers 8 are respectively provided on the pin 7;

[0030] The lever 9 is fixedly installed in the middle of the main shaft 2. The lever 9 has slots 10 on both sides that can cooperate with the roller 8. When the piston 3 moves, the main shaft 2 can be driven to rotate through the cooperation of the roller 8 and the slots 10.

[0031] The reset assembly is fixedly installed on the lower part of the cylinder 1. The reset assembly includes a housing 11, which is connected to the cylinder 1 via a first connector 12. A traction shaft 13 that can cooperate with the main shaft 2 is provided inside the housing 11. A coil spring 14 is provided on the outside of the traction shaft 13, and one end of the coil spring 14 is fitted into the traction shaft 13. A protective shell 21 is provided inside the lower shell 26, and the other end of the coil spring 14 is connected to the protective shell 21 via a fixing bolt. When pressurized gas is introduced into the cylinder 1, the piston 3 drives the main shaft 2 to rotate. At this time, the traction shaft 13 drives the coil spring 14 to retract. When the pressurized gas is cut off, the coil spring 14 resets, and the main shaft 2 is reset via the traction shaft 13.

[0032] Furthermore, a prism segment 15 is provided in the middle of the main shaft 2, and a polygonal hole 16 that can cooperate with the prism segment 15 is provided in the middle of the lever block 9; the lever block 9 is radially fixedly installed on the main shaft 2 through the cooperation of the polygonal hole 16 and the prism segment 15; a positioning sleeve 17 for fixing the lever block 9 is provided in the upper section of the main shaft 2, and the lever block 9 is axially fixedly installed on the main shaft 2 through the positioning sleeve 17; a shaft retaining ring 18 for fixing the positioning sleeve 17 is provided at the upper end of the main shaft 2.

[0033] Furthermore, the distance between the outer walls of the two second forks 6 is less than the distance between the inner walls of the two first forks 5, so that the two second forks 6 on one piston 3 can extend between the two first forks 5 on the other piston 3 without motion interference.

[0034] Furthermore, the second fork 6 is provided with mounting holes 19, and a retaining ring 20 for fixing the pin 7 is provided in each mounting hole 19.

[0035] Furthermore, a pad 22 is provided between the upper and lower ends of the roller 8 and the second fork 6, respectively. The pad 22 prevents friction between the roller 8 and the second fork 6, thus avoiding damage to the second fork 6.

[0036] Furthermore, a fixing hole 23 is provided on the traction shaft 13, and a bent insert 24 that can cooperate with the fixing hole 23 is provided at one end of the coil spring 14; the other end of the coil spring 14 is connected to the protective shell 11 by a fixing bolt, one end of the coil spring 14 is fixed on the shell 11, the bent insert 23 is inserted into the fixing hole 23, and when the traction shaft 13 rotates, it drives the coil spring 14 to retract inward.

[0037] Furthermore, the housing 11 includes an upper housing 25 and a lower housing 26, which are connected by a second connector 27.

[0038] Furthermore, the main shaft 2 and the traction shaft 13 are respectively provided with square holes 28 and square posts 29 that can cooperate with each other. The square connection enables the main shaft 2 and the traction shaft 13 to move synchronously and will not slip.

[0039] Furthermore, a protective sleeve 30 is provided on the outer side of the traction shaft 13. The protective sleeve 30 has a relief hole 31 corresponding to the fixing hole 23. The relief hole 31 facilitates the insertion of the coil spring 14 into the fixing hole 23.

[0040] Furthermore, guide grooves 32 are respectively provided on the first fork 5 and the second fork 6, and a guide plate 33 that can cooperate with the guide grooves 32 is provided on the inner side wall of the cylinder 1. The cooperation between the guide grooves 23 and the guide plate 33 plays a guiding and positioning function, reducing wear between the piston and the cylinder.

[0041] Working principle: When this utility model is in use, after pressurized gas is introduced into the cylinder 1, the two pistons 3 move inward. When the pistons 3 move, they can drive the main shaft 2 to rotate through the cooperation of the roller 8 and the slot 10. The main shaft 2 drives the traction shaft 13 to rotate through the four-way connection. At this time, the coil spring 14 retracts inward. After the pressurized gas is cut off, the pistons 3 lose power, the coil spring 14 returns to its original position, and the main shaft 2 returns to its original position through the traction shaft 13. The pistons 3 return to their original position synchronously.

[0042] It is understood that the above embodiments are merely exemplary models used to illustrate the principles of this utility model, and this utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A high-frequency angular stroke actuator, characterized in that, include: A cylinder body (1) is provided with a main shaft (2) rotatably mounted in the middle of the cylinder body (1). Pistons (3) are respectively mounted inside the cylinder body (1) on both sides of the main shaft (2). A shift fork assembly (4) is respectively mounted on the two pistons (3). The shift fork assembly (4) includes two first forks (5) and two second forks (6) arranged in parallel. A pin (7) is provided between the two second forks (6). Rollers (8) are respectively mounted on the pin (7). The paddle (9) is fixedly installed in the middle of the main shaft (2), and the paddle (9) has slots (10) on both sides that can cooperate with the roller (8). The reset assembly is fixedly installed on the underside of the cylinder (1). The reset assembly includes a housing (11). The housing (11) is connected to the cylinder (1) by a first connector (12). A traction shaft (13) that can cooperate with the main shaft (2) is provided inside the housing (11). A coil spring (14) is provided on the outside of the traction shaft (13). One end of the coil spring (14) is fitted into the traction shaft (13), and the other end of the coil spring (14) is connected to the housing (11).

2. The high-frequency angular stroke actuator according to claim 1, characterized in that, The main shaft (2) is provided with a prism section (15) in the middle, and the middle of the lever (9) is provided with a polygonal hole (16) that can cooperate with the prism section (15); the upper section of the main shaft (2) is provided with a positioning sleeve (17) for fixing the lever (9), and the upper end of the main shaft (2) is provided with a shaft retaining ring (18) for fixing the positioning sleeve (17).

3. The high-frequency angular stroke actuator according to claim 1, characterized in that, The second fork (6) is provided with mounting holes (19), and the mounting holes (19) are provided with retaining rings (20) for fixing the pin (7).

4. The high-frequency angular stroke actuator according to claim 1, characterized in that, Gaskets (22) are respectively provided between the upper and lower ends of the roller (8) and the second fork (6).

5. A high-frequency angular stroke actuator according to claim 1, characterized in that, The traction shaft (13) has a fixing hole (23), and one end of the coil spring (14) is provided with a bent insert plate (24) that can cooperate with the fixing hole (23); a protective shell (21) is provided inside the housing (11), and the other end of the coil spring (14) is connected to the protective shell (21) by a fixing bolt.

6. A high-frequency angular stroke actuator according to claim 1, characterized in that, The housing (11) includes an upper shell (25) and a lower shell (26), which are connected by a second connector (27).

7. A high-frequency angular stroke actuator according to claim 1, characterized in that, The main shaft (2) and the traction shaft (13) are respectively provided with square holes (28) and square posts (29) that can cooperate with each other.

8. A high-frequency angular stroke actuator according to claim 1, characterized in that, A protective sleeve (30) is provided on the outer side of the traction shaft (13), and a clearance hole (31) corresponding to the fixing hole (23) is provided on the protective sleeve (30).

9. A high-frequency angular stroke actuator according to claim 1, characterized in that, The first fork (5) and the second fork (6) are respectively provided with guide grooves (32), and the inner side wall of the cylinder (1) is provided with a guide plate (33) that can cooperate with the guide grooves (32).

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