A self-locking structure for a pneumatic actuator
By introducing a self-locking structure into the pneumatic actuator, and utilizing the contact between the hook and the block, as well as the cooperation of the electromagnetic coil, the problem of the pneumatic actuator retracting under reverse load is solved, achieving a more stable self-locking effect and a simplified air circuit design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PINGHU GAOYUAN MACHINERY MANUFACTURING CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-30
AI Technical Summary
Existing pneumatic actuators are prone to retraction under reverse loads, and pneumatic position-holding valves are susceptible to leakage failure, with complex air connection circuits.
A self-locking structure for a pneumatic actuator was designed. The self-locking rod is moved by the drive rod, and the contact between the hook and the block is used to prevent retraction. The self-locking rod is actively reset by the electromagnetic coil and spring.
It effectively prevents the drive rod from retracting under reverse load, simplifies the air circuit structure, and improves stability and reliability.
Smart Images
Figure CN224432973U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pneumatic mechanism technology, and more specifically relates to a self-locking structure for a pneumatic actuator. Background Technology
[0002] Pneumatic actuators are typically used as linear drive devices. By filling the pneumatic actuator with a certain amount of air and controlling the air pressure, the moving parts of the pneumatic actuator can be driven to move linearly, such as push rods and pistons, through pressurized gas, thereby driving the other mechanisms to perform actions.
[0003] If a reverse load is generated at the drive end of the pneumatic actuator, a pneumatic position holding valve is needed to stabilize the air pressure in the actuator to prevent the moving part from retracting. However, the pneumatic position holding valve may leak and fail, and the air connection is complicated. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a self-locking structure for a pneumatic actuator. The drive rod extends and drives the self-locking rod to move. When the catch hook passes the second catch hook, the contact between the second catch block and the catch hook can effectively prevent the drive rod from passively retracting when subjected to reverse load.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-locking structure for a pneumatic actuator, comprising a base, the pneumatic actuator located on the base, a self-locking rod provided on the drive rod of the pneumatic actuator, the other end of the self-locking rod connected to a load, a latching hook hinged to the self-locking rod, a first latching block and several second latching blocks corresponding to the latching hook provided on the base, the first latching block being located at the starting position of the latching hook, the several second latching blocks being distributed in the driving direction of the drive rod, and the second latching blocks being telescopically connected to the base.
[0006] Furthermore, a fixing block is provided on the self-locking rod, and a fixing plate extends from one side of the fixing block, with the hook hinged to the fixing plate.
[0007] Furthermore, the fixing plate is provided with a groove, and the hook is hinged to the groove.
[0008] Furthermore, a support block is provided on the base, and the second locking block is slidably connected to the support block with the sliding direction perpendicular to the driving direction of the drive rod. An electromagnetic coil and a moving iron core are provided inside the support block, the second locking block is connected to the moving iron core, and a spring is provided between the moving iron core and the support block.
[0009] Compared with the prior art, the beneficial effects of this utility model are: the drive rod extends to drive the self-locking rod to move. When the hook passes the second hook, the contact between the second locking block and the hook can effectively prevent the drive rod from being passively retracted when subjected to reverse load. When the drive rod needs to actively retract, the second locking block moves and retracts, actively separating from the hook, so that the self-locking rod can retract under the drive rod and realize the reset of the drive rod. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the self-locking structure of the pneumatic actuator of this utility model;
[0011] Figure 2 This is a schematic diagram of another state of the self-locking structure of the pneumatic actuator of this utility model.
[0012] Reference numerals: 1. Base; 2. Pneumatic actuator; 3. Drive rod; 4. Self-locking rod; 5. Hook; 6. First locking block; 7. Second locking block; 8. Fixing block; 9. Fixing plate; 10. Groove; 11. Support block; 12. Electromagnetic coil; 13. Moving iron core; 14. Spring. Detailed Implementation
[0013] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.
[0014] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.
[0015] Reference Figure 1 and Figure 2 The present invention will be further described below.
[0016] A self-locking structure for a pneumatic actuator includes a base 1, a pneumatic actuator 2 located on the base 1, a self-locking rod 4 provided on the drive rod 3 of the pneumatic actuator 2, the other end of the self-locking rod 4 being connected to a load, a hook 5 hinged to the self-locking rod 4, a first locking block 6 corresponding to the hook 5 and several second locking blocks 7 provided on the base 1, the first locking block 6 being located at the starting position of the hook 5, the several second locking blocks 7 being distributed in the driving direction of the drive rod 3, and the second locking blocks 7 being telescopically connected to the base 1.
[0017] like Figure 1 and Figure 2 As shown, when the drive rod 3 is not extended, its hook 5 is in contact with the first locking block 6, that is, the first locking block 6 fixes the starting position of the drive rod 3. After the pneumatic actuator 2 is started, the drive rod 3 extends, driving the self-locking rod 4 to move. When the hook 5 passes the second locking block 7, the contact between the second locking block 7 and the hook 5 can effectively prevent the drive rod 3 from being passively retracted when subjected to reverse load. When the drive rod 3 needs to actively retract, the second locking block 7 moves and retracts, actively separating from the hook 5, so that the self-locking rod 4 can retract under the drive of the drive rod 3, realizing the reset of the drive rod 3.
[0018] Specifically, when the load on the drive rod 3 is such that it tends to extend, the hook 5, the first locking block 6, and the second locking block 7 are all installed in opposite directions.
[0019] Specifically, multiple fixed points are achieved by setting multiple second card blocks 7.
[0020] like Figure 1 and Figure 2 As shown in the preferred embodiment, the self-locking rod 4 is provided with a fixing block 8, and a fixing plate 9 extends from one side of the fixing block 8. The hook 5 is hinged to the fixing plate 9, that is, the hook 5 is located on one side of the self-locking rod 4. Then the first locking block 6 and the second locking block 7 are both located on one side of the self-locking rod 4, so as to avoid the first locking block 6 and the second locking block 7 interfering with the movement of the drive rod 3 and the self-locking rod 4.
[0021] Specifically, the fixing block 8 is fixedly connected to the self-locking rod 4, which can be fixed by a pin or bolt passing through the fixing block 8 and the self-locking rod 4, or by welding or other methods.
[0022] like Figure 1 and Figure 2 As shown, in this preferred embodiment, the fixing plate 9 is provided with a groove 10, and the hook 5 is hinged to the groove 10.
[0023] Specifically, the bottom surface of the groove 10 supports the hook 5 and is also the lowest limiting surface of the hook 5. The top surface of the groove 10 is inclined. When the hook 5 passes the second locking block 7, it rotates and the inclined top surface will not interfere with it.
[0024] like Figure 1 and Figure 2 As shown in this example, preferably, the base 1 is provided with a support block 11, the second locking block 7 is telescopically slidably connected to the support block 11, the sliding direction is perpendicular to the driving direction of the drive rod 3, the support block 11 is provided with an electromagnetic coil 12 and a moving iron core 13, the second locking block 7 is connected to the moving iron core 13, and a spring 14 is provided between the moving iron core 13 and the support block 11.
[0025] Specifically, when the electromagnetic coil 12 is energized, it drives the iron core to descend, thereby separating it from the hook 5. When the electromagnetic coil 12 is de-energized, the second hook 7 is pushed out and reset by the spring 14.
[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A self-locking structure of a pneumatic actuator, characterized by: The device includes a base, on which the pneumatic actuator is located. A self-locking rod is provided on the drive rod of the pneumatic actuator, and the other end of the self-locking rod is connected to the load. A hook is hinged on the self-locking rod. The base is provided with a first locking block and several second locking blocks corresponding to the hook. The first locking block is located at the starting position of the hook, and the several second locking blocks are distributed in the driving direction of the drive rod. The second locking blocks are telescopically connected to the base.
2. The self-locking structure of the pneumatic actuator according to claim 1, characterized in that: A fixing block is provided on the self-locking rod, and a fixing plate extends from one side of the fixing block. The hook is hinged to the fixing plate.
3. The self-locking structure of the pneumatic actuator according to claim 2, characterized in that: The fixing plate is provided with a groove, and the hook is hinged to the groove.
4. The self-locking structure of the pneumatic actuator according to claim 1, characterized in that: A support block is provided on the base, and the second locking block is slidably connected to the support block. The sliding direction is perpendicular to the driving direction of the drive rod. An electromagnetic coil and a moving iron core are provided inside the support block. The second locking block is connected to the moving iron core, and a spring is provided between the moving iron core and the support block.