Buffer mechanism of pneumatic actuator

Abstract

The utility model discloses a buffer mechanism of a pneumatic actuator, which comprises a mounting frame, an actuator body and a first buffer area arranged in the mounting frame, the interior of the actuator body is hollow, the front end of the actuator body is provided with the first buffer area, the first buffer area comprises a buffer cavity arranged in the actuator body, and a buffer pad is arranged in the buffer cavity. And a plurality of second springs are evenly arranged in the buffer cavity along the outer side, a mounting disc is arranged at the bottom of the stamping rod, and a buffer ring used for entering the buffer cavity for buffering is arranged on the outer side of the mounting disc. The clamping groove in the tail section of the sliding column makes contact with the limiting block in the mounting plate, the impact force generated when the stamping rod falls down is relieved through the process that the limiting block enters and leaves the clamping groove, and then the stamping rod element is effectively protected.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic actuator protection technology, and in particular, it is a buffer mechanism for a pneumatic actuator. Background Technology

[0002] A pneumatic actuator is an actuating device that uses air pressure to open, close, or regulate valves. It is also called a pneumatic actuator mechanism or pneumatic device, but is commonly referred to as a pneumatic head. As a core driving component in industrial automation, pneumatic actuators are widely used in valve control, mechanical transmission, and other scenarios. They use compressed air to drive piston movement, achieving fast and efficient linear or rotary actions.

[0003] However, as the piston approaches the end of its stroke, due to inertia and a sudden drop in cylinder pressure, the piston rod often collides rigidly with the end cap or limiting structure, generating a significant impact force. This impact not only causes equipment vibration and noise but also leads to fatigue damage to critical components (such as the piston rod and seals), severely shortening the actuator's service life. Therefore, there is an urgent need for a buffer mechanism that combines pneumatic throttling control with elastic energy absorption and supports online adjustment to address these shortcomings.

[0004] The purpose of this invention is to provide a buffer mechanism for a pneumatic actuator to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a buffer mechanism for a pneumatic actuator to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a buffer mechanism for a pneumatic actuator, comprising a mounting frame and an actuator body disposed inside the mounting frame. The actuator body is hollow inside, and a first buffer zone is provided at the front end of the actuator body. The first buffer zone includes a buffer cavity disposed inside the actuator body, and a buffer pad is disposed inside the buffer cavity. A plurality of second springs are evenly disposed along the outer side of the buffer cavity. A stamping rod is disposed inside the actuator body, and a mounting plate is disposed at the bottom of the stamping rod. A buffer ring for entering the buffer cavity for buffering is disposed outside the mounting plate. A mounting post is disposed at the bottom of the stamping rod, and a second buffer zone for buffering and protecting the piston when its movement ends is disposed inside the mounting post. The second buffer zone includes a buffer assembly disposed inside the mounting post. The buffer assembly includes a mounting groove that extends through the mounting post. Mounting plates are symmetrically disposed inside the mounting groove, and a third spring is disposed inside the mounting plate.

[0007] Furthermore, a first spring is provided at the bottom of the mounting plate, and a sliding post is also provided at the bottom of the mounting plate. The sliding post is disposed inside the first spring, and a connecting plate is connected to the end of the first spring.

[0008] Furthermore, one end of the third spring is connected to the inner wall of the mounting column, and the other end is connected to a limiting block, the upper and lower end faces of which are inclined.

[0009] Furthermore, an air outlet pipe is connected to the outside of the buffer chamber, a throttle valve is provided on the outside of the air outlet pipe, and several slots are provided on the outside of the sliding column.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. By setting a second buffer zone, when the stamping rod returns to its original position and approaches the end section, the slot of the end section of the sliding column contacts the limiting block in the mounting plate. The impact force of the stamping rod falling is reduced and buffered by the process of the limiting block entering and leaving the slot, thereby effectively protecting the stamping rod component.

[0012] 2. By setting a first buffer zone, when the actuator body moves forward to the end segment, the buffer ring will enter the buffer cavity to buffer and reduce the impact force between the pressure rod and the front cover of the actuator body, thereby protecting the pressure rod. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded structural diagram of the actuator body in this utility model;

[0016] Figure 3 This is a schematic diagram of the buffer cavity in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the stamping rod in this utility model;

[0018] Figure 5 for Figure 4 A magnified structural diagram of point A in the middle.

[0019] Explanation of reference numerals in the attached figures:

[0020] In the picture:

[0021] 1. Mounting frame; 2. Stamping rod; 3. Actuator body; 4. Air outlet pipe; 5. Throttling valve; 6. Mounting plate; 7. Sliding column; 8. First spring; 9. Connecting plate; 10. Mounting column; 11. Buffer pad; 12. Second spring; 13. Buffer chamber; 14. Buffer ring; 15. Mounting plate; 16. Third spring; 17. Limiting block; 18. Slot. Detailed Implementation

[0022] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0023] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0024] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0025] Please see Figures 1 to 5 As shown, a buffer mechanism for a pneumatic actuator includes a mounting frame 1 and an actuator body 3, which is disposed inside the mounting frame 1. The actuator body 3 is hollow inside, and a first buffer zone is provided at the front end of the actuator body 3. The first buffer zone includes a buffer cavity 13 disposed inside the actuator body 3. The buffer cavity 13 is annular and disposed inside the actuator body 3. A buffer pad 11 is disposed inside the buffer cavity 13. Several second springs 12 are evenly disposed along the outer side of the buffer cavity 13. A mounting plate 6 is provided at the bottom of the punch rod 2. A buffer ring 14 for entering the buffer cavity 13 for buffering is provided on the outer side of the mounting plate 6. An exhaust pipe 4 is connected to the outer side of the buffer cavity 13. A throttle valve 5 is provided on the outer side of the exhaust pipe 4. The throttle valve 5 includes an adjusting bolt and a conical valve core (not shown in the figure). The gap between the conical valve core and the exhaust channel is changed by rotating the adjusting bolt to control the exhaust flow. When the punch rod 2 approaches the end of its stroke, its end enters the buffer cavity 13. The gas in the actuator body 3 can only be discharged through the annular gap and the adjustable throttle valve.

[0026] A stamping rod 2 is mounted on the actuator body 3. A mounting post 10 is located at the bottom of the stamping rod 2. A second buffer zone is located within the mounting post 10 to buffer and protect the piston when its movement ends. The second buffer zone includes a buffer assembly located within the mounting post 10. A first spring 8 is located at the bottom of the mounting plate 6. A sliding post 7 is also located at the bottom of the mounting plate 6. Several slots 18 are located on the outer side of the sliding post 7. The sliding post 7 is located within the first spring 8. A connecting plate 9 is connected to the end of the first spring 8. The buffer assembly includes a mounting groove that extends through the mounting post 10. Symmetrically arranged within the mounting groove are... Mounting plate 15, with a third spring 16 inside. One end of the third spring 16 is connected to the inner wall of mounting column 10, and the other end is connected to a limiting block 17. The upper and lower end faces of the limiting block 17 are inclined. The purpose of this setting is to facilitate the entry and exit of the limiting block 17 into the slot 18. When the stamping rod 2 is retracted, the sliding column 7 slides inside the mounting column 10, thereby moving the slot on the surface of the limiting block. During this process, the limiting block 17 continuously enters and exits the slot 18, thereby slowing down the movement of the sliding column 7 and reducing the impact force of the sliding column 7 falling.

[0027] Working principle: When the actuator body 3 works in the mounting frame 1, the stamping rod 2 drives the mounting plate 6 to move. When it reaches the end, it enters the buffer chamber 13. The gas in the actuator body 3 can only be discharged through the annular gap and the adjustable throttle valve 5. Due to the reduction of the cross-sectional area of ​​the exhaust pipe 4, the gas back pressure increases, which forces the stamping rod 2 to decelerate. The buffer ring 14 enters the buffer chamber 13 and contacts the buffer pad 11 to decelerate. Then it contacts the second spring 12 to further reduce the impact and achieve a soft landing.

[0028] When the stamping rod 2 retracts, the sliding column 7 slides towards the mounting column 10, thereby compressing the first spring 8. This causes the sliding column 7 to contact the limiting block 17 in the mounting plate 15, and the limiting block 17 continuously enters and leaves the slot 18. Consequently, the third spring 16 is continuously compressed and recovers its deformation, thereby slowing down its movement and reducing the impact force of the sliding column 7.

[0029] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cushioning mechanism for a pneumatic actuator, characterized by: The utility model relates to a kind of buffer device of pneumatic cylinder, including Mounting frame (1); Executor body (3) is arranged inside mounting frame (1), the executor body (3) is hollow inside, the executor body (3) front end is provided with first buffer area, the first buffer area includes the buffer cavity (13) being arranged inside executor body (3), buffer pad (11) is arranged in the buffer cavity (13), several second springs (12) are evenly arranged in the buffer cavity (13) along outside side, punch rod (2) is arranged inside the executor body (3), the mounting disc (6) is arranged in the bottom of punch rod (2), the buffer ring (14) for entering buffer cavity (13) and buffering is arranged in the outside of mounting disc (6); The punch rod (2) bottom is provided with mounting column (10), the second buffer area for buffering protection to piston movement end is arranged in the mounting column (10), second buffer area includes the buffer assembly being arranged in mounting column (10), the buffer assembly includes the installation slot being opened in the inside of mounting column (10), the mounting plate (15) is symmetrically arranged in the installation slot, the third spring (16) is arranged in the mounting plate (15).

2. A cushioning mechanism for a pneumatic actuator according to claim 1, wherein: The mounting disc (6) bottom is provided with first spring (8), the mounting disc (6) bottom is also provided with sliding column (7), the sliding column (7) is arranged in first spring (8), and the end of first spring (8) is connected with connecting disc (9).

3. A cushioning mechanism for a pneumatic actuator according to claim 2, wherein: The third spring (16) one end is connected with the inner wall of mounting column (10), and the other end is connected with limit block (17), and the upper and lower end surfaces of limit block (17) are arranged in inclined shape.

4. A cushioning mechanism for a pneumatic actuator according to claim 3, wherein: The buffer cavity (13) outside is communicated with gas outlet pipe (4), the gas outlet pipe (4) outside is provided with throttle valve (5), and the sliding column (7) outside is provided with several clamping grooves (18).

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