Three-position pneumatic actuator
By introducing auxiliary mechanisms of the limiting plate and slide structure into the pneumatic actuator, the problem of parts colliding with each other is solved, and the long life and stability of parts are achieved.
Patent Information
- Application Number
- CN202421713735.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In existing pneumatic actuators, internal parts easily collide with each other due to excessive air pressure difference, resulting in a reduced service life.
A three-position pneumatic actuator is designed. By setting an auxiliary mechanism between the sealing block and the rack, the limiting plate and slider structure are used to reduce the impact force of the sealing block and avoid hard impact.
It extends the service life of parts, improves the stability of the equipment, and avoids damage to internal parts.
Smart Images
Figure CN223227970U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pneumatic actuators, in particular to a three-position pneumatic actuator. Background Art
[0002] Actuators are essential components in valves, acting as actuators to open and close valves or adjust their opening. Actuators are primarily categorized by their actuation method: automatic and manual. Automatic actuators in existing technology are primarily pneumatically driven and are also called pneumatic actuators, pneumatic actuators, or pneumatic devices, though they are more commonly referred to as pneumatic heads.
[0003] Since the air pressure difference inside the pneumatic actuator drives the sealing block to move to achieve the forward and reverse rotation of the gear, if the air pressure difference is too large, the internal sealing block will be too close and the gears will rotate excessively, colliding with each other and easily damaging the parts, thereby reducing the service life of the parts. Therefore, this application proposes a three-position pneumatic actuator. Summary of the Invention
[0004] The purpose of the utility model is to solve the problem in the background technology that internal parts easily collide with each other, and to propose a three-position pneumatic actuator.
[0005] The technical solution of the utility model: a three-position pneumatic actuator includes a main body and also includes:
[0006] A first air chamber, the first air chamber is opened in the main body, and a second air chamber is opened on both sides of the first air chamber, and a sealing block is symmetrically slidably installed between the first air chamber and the second air chamber, and the sealing block is slidably connected to the main body and is sealed. A first spring is fixedly installed on one side of the sealing block, and the first spring is fixedly connected to the main body. A rack connecting rod is fixedly installed on one side of the sealing block, and a rack is fixedly installed on one end of the connecting rod. A gear is rotatably installed in the main body, and the gear is engaged with the rack. An auxiliary mechanism is provided on the sealing block to prevent the rack from colliding with the sealing block.
[0007] Optionally, the auxiliary mechanism includes a guide hole opened on the rack, a limiting column is fixedly installed on the sealing block, one end of the limiting column is located in the guide hole, a limiting plate is slidably installed on the limiting column, a second spring is sleeved on the limiting column, one end of the second spring is fixedly connected to the limiting plate, one side of the limiting plate contacts one end of the rack, a connecting plate is hinged to one side of the limiting plate, a slider is slidably installed on the rack, and the connecting plate is hinged to the slider.
[0008] Optionally, a notch is provided on the rack, a main body is provided in the notch, and both ends of the slider are located in the slide groove.
[0009] Optionally, a third spring is fixedly mounted on one end of the slider, and one end of the third spring is fixedly connected to the inner wall of the slot.
[0010] Optionally, a first air duct is fixedly installed on one side of the main body, and the first air duct is connected to the first air chamber.
[0011] Optionally, a second air duct is fixedly installed on one side of the main body, and the second air duct is connected to the second air chamber.
[0012] Optionally, a fixing column is fixedly mounted on the gear, a rotating block is rotatably mounted on the main body, and the fixing column is fixedly connected to the rotating block.
[0013] In summary, this application includes at least one of the following beneficial technical effects:
[0014] 1. Inflate inward through the first air channel, and the second air channel is opened. The air pressure in the first air chamber increases, driving the sealing block to move to both sides. The fixed rack of the sealing block fan drives the gear to rotate forward, and the first air channel stops inflating. The first spring rebounds and drives the sealing block to reset. Similarly, open the first air channel, and the second air channel inflates the second air chamber. The air pressure in the second air chamber increases, driving the sealing blocks to move closer to each other. Open the second air channel, and the second spring rebounds and drives the sealing block to reset, thereby realizing the rapid reset of the sealing block.
[0015] 2. As the sealing block gets closer, it contacts the limit plate and squeezes it. Since the connecting plate is hinged to the slider and the limit plate, the limit plate moves downward, driving the slider to compress the third spring, reducing the impact force of the sealing block and preventing damage to the sealing block caused by excessive pressure in the second air chamber.
[0016] The utility model can avoid hard collision of internal connections of the equipment, extend the service life of parts and improve stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A structural diagram of an embodiment of the present invention is given;
[0018] Figure 2 A schematic diagram of the internal structure of an embodiment of the present invention is given;
[0019] Figure 3 A schematic structural diagram of a sealing block, a limiting plate and a sliding block in one embodiment of the utility model is given.
[0020] Figure numerals: 1. main body; 2. first air chamber; 3. second air chamber; 4. sealing block; 5. rack; 6. connecting rod; 7. fixing column; 8. gear; 9. guide hole; 10. first spring; 11. rotating block; 12. first air channel; 13. second air channel; 14. second spring; 15. notch; 16. limit plate; 17. limit column; 18. connecting plate; 19. slider; 20. third spring; 21. slide groove. DETAILED DESCRIPTION
[0021] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.
[0022] Example
[0023] like Figure 1-2 As shown, the three-position pneumatic actuator proposed by the present invention includes a main body 1 and a first air chamber 2. The first air chamber 2 is opened in the main body 1. Second air chambers 3 are opened on both sides of the first air chamber 2. A sealing block 4 is symmetrically installed for sliding between the first air chamber 2 and the second air chamber 3. The sealing block 4 is slidably connected to the main body 1 and is sealed. A first spring 10 is fixedly installed on one side of the sealing block 4. The first spring 10 is fixedly connected to the main body 1. A rack connecting rod 6 is fixedly installed on one side of the sealing block 4. A rack 5 is fixedly installed on one end of the connecting rod 6. A gear 8 is rotatably installed in the main body 1. The gear 8 is engaged with the rack 5. A first air duct 12 is fixedly installed on one side of the main body 1. The first air duct 12 is communicated with the first air chamber 2. One side of the main body 1 is fixed A second air duct 13 is fixedly installed, and the second air duct 13 is connected to the second air chamber 3. A fixed column 7 is fixedly installed on the gear 8, and a rotating block 11 is rotatably installed on the main body 1. The fixed column 7 is fixedly connected to the rotating block 11. The first air duct 12 is inflated inward, and the second air duct 13 is opened. At this time, the air pressure in the first air chamber 2 increases, driving the sealing block 4 to move to both sides, and the sealing block 4 fans the fixed rack 5 to drive the gear 8 to rotate forward. The first air duct 12 stops inflating, and the first spring 10 rebounds to drive the sealing block 4 to reset. Similarly, the first air duct 12 is opened, and the second air duct 13 inflates the second air chamber 3. The air pressure in the second air chamber 3 increases, driving the sealing blocks 4 to approach each other, and driving the gear 8 to reverse. The sealing block 4 is provided with an auxiliary mechanism to prevent the rack 5 from colliding with the sealing block 4.
[0024] like Figure 2-3As shown, this embodiment also includes an auxiliary mechanism, which includes a guide hole 9 opened on the rack 5, a limit column 17 fixedly installed on the sealing block 4, one end of the limit column 17 is located in the guide hole 9, a limit plate 16 is slidably installed on the limit column 17, a second spring 14 is sleeved on the limit column 17, one end of the second spring 14 is fixedly connected to the limit plate 16, one side of the limit plate 16 contacts one end of the rack 5, a connecting plate 18 is hinged to one side of the limit plate 16, a slider 19 is slidably installed on the rack 5, the connecting plate 18 is hinged to the slider 19, and a third spring 20 is fixedly installed on one end of the slider 19. One end of the third spring 20 is fixedly connected to the inner wall of the slot 15, opening the first air passage 12, and the second air passage 13 inflates the second air chamber 3. The air pressure in the second air chamber 3 increases, driving the sealing blocks 4 to approach each other. When the sealing blocks 4 get closer and closer, the sealing blocks 4 contact the limit plate 16, and the sealing blocks 4 squeeze the limit plate 16. Since the connecting plate 18 is hinged to the slider 19 and the limit plate 16 respectively, the limit plate 16 can drive the slider 19 to compress the third spring 20 when it moves downward, reducing the impact force of the sealing block 4, and avoiding the excessive air pressure in the second air chamber 3 causing the sealing block 4 to collide with the rack 5 and be damaged.
[0025] like Figure 2-3 As shown, a notch 15 is formed on the rack 5 , the main body 1 is formed in the notch 15 , and both ends of the slider 19 are located in the slide groove 21 .
[0026] Working principle: the first air channel 12 is inflated inward, the second air channel 13 is opened, the air pressure in the first air chamber 2 increases, driving the sealing block 4 to move to both sides, the sealing block 4 fans the fixed rack 5 to drive the gear 8 to rotate forward, the first air channel 12 stops inflating, and the first spring 10 rebounds to drive the sealing block 4 to reset. Similarly, the first air channel 12 is opened, and the second air channel 13 inflates the second air chamber 3. The air pressure in the second air chamber 3 increases, driving the sealing blocks 4 to approach each other, driving the gear 8 to reverse. When the sealing blocks 4 get closer and closer, the sealing blocks 4 contact the limit plate 16, and the sealing blocks 4 squeeze the limit plate 16. Since the connecting plate 18 is hinged to the slider 19 and the limit plate 16 respectively, the limit plate 16 can drive the slider 19 to compress the third spring 20 when it moves downward, reducing the impact force of the sealing block 4, and avoiding the excessive air pressure in the second air chamber 3 causing the sealing block 4 to collide with the rack 5 and be damaged, thereby avoiding hard collisions of the internal connections of the equipment, extending the service life of parts, and improving stability.
[0027] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A three-position pneumatic actuator comprising a main body (1), characterized in that Also includes: A first air chamber (2) is provided in a main body (1), and second air chambers (3) are provided on both sides of the first air chamber (2). A sealing block (4) is symmetrically and slidingly installed between the first air chamber (2) and the second air chamber (3), and the sealing block (4) is slidably connected to the main body (1) and is provided for sealing. A first spring (10) is fixedly installed on one side of the sealing block (4), and the first spring (10) is fixedly connected to the main body (1). A rack connecting rod (6) is fixedly installed on one side of the sealing block (4), and a rack (5) is fixedly installed on one end of the connecting rod (6). A gear (8) is rotatably installed in the main body (1), and the gear (8) is engaged with the rack (5). An auxiliary mechanism for preventing the rack (5) from colliding with the sealing block (4) is provided on the sealing block (4).
2. The three-position pneumatic actuator according to claim 1, characterized in that: The auxiliary mechanism includes a guide hole (9) opened on the rack (5), a limiting column (17) is fixedly installed on the sealing block (4), one end of the limiting column (17) is located in the guide hole (9), a limiting plate (16) is slidably installed on the limiting column (17), a second spring (14) is sleeved on the limiting column (17), one end of the second spring (14) is fixedly connected to the limiting plate (16), one side of the limiting plate (16) contacts one end of the rack (5), one side of the limiting plate (16) is hinged with a connecting plate (18), a slider (19) is slidably installed on the rack (5), and the connecting plate (18) is hinged to the slider (19).
3. The three-position pneumatic actuator according to claim 2, characterized in that: A notch (15) is provided on the rack (5), a main body (1) is provided in the notch (15), and both ends of the slider (19) are located in the slide groove (21).
4. The three-position pneumatic actuator according to claim 2, characterized in that: A third spring (20) is fixedly mounted on one end of the slider (19), and one end of the third spring (20) is fixedly connected to the inner wall of the notch (15).
5. The three-position pneumatic actuator according to claim 1, characterized in that: A first air channel (12) is fixedly mounted on one side of the main body (1), and the first air channel (12) is in communication with the first air chamber (2).
6. The three-position pneumatic actuator according to claim 1, characterized in that: A second air duct (13) is fixedly mounted on one side of the main body (1), and the second air duct (13) is in communication with the second air chamber (3).
7. The three-position pneumatic actuator according to claim 1, characterized in that: A fixed column (7) is fixedly mounted on the gear (8), a rotating block (11) is rotatably mounted on the main body (1), and the fixed column (7) is fixedly connected to the rotating block (11).