CN219827558U

CN219827558U - Pneumatic buffer with good sealing performance

Info

Publication number: CN219827558U
Application number: CN202222738784.0U
Authority: CN
Inventors: 林建乐; 王栩
Original assignee: Wenzhou Yimuyi Pneumatic Science & Technology Co ltd
Current assignee: Wenzhou Yimuyi Pneumatic Science & Technology Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-10-13
Anticipated expiration: 2032-10-18

Abstract

The utility model discloses a pneumatic buffer with good sealing performance, which comprises a top cover, a cylinder body, a piston rod, a piston and a bottom cover, wherein a through hole is formed in the middle of the top cover, the bottom cover and the cylinder body form a sealing cavity, the sealing cavity is divided into a sealing cavity I and a sealing cavity II through the piston, a rubber pad is arranged at the outer end of the piston, the rubber pad is tightly attached to the inner wall of the cylinder body, the piston rod is inserted into the sealing cavity I through the through hole and is connected with the piston through a bolt, a throttle valve is arranged at one end of the piston, close to the sealing cavity I, of the piston, and a one-way valve is arranged at one end of the piston, close to the sealing cavity II.

Description

Pneumatic buffer with good sealing performance

Technical Field

The utility model belongs to the technical field of buffers, and particularly relates to a pneumatic buffer with good sealing performance.

Background

The buffer is mainly used for inhibiting vibration and impact during rebound, and mainly plays a role in buffering so as to protect other structures in equipment, and a large number of buffers in the prior art are spring-type buffers, and the buffer is mainly realized by absorbing impact in the compression process through springs.

But the spring type buffer has the self-vibration phenomenon, is easy to transfer low-frequency vibration, has low internal tightness of the buffer with a complex structure, has limited service life of the spring, and cannot adjust the size of kinetic energy buffering.

Disclosure of Invention

In order to solve the problems, the utility model provides the following scheme:

the utility model provides a pneumatic buffer that leakproofness is good, includes top cap, cylinder body, piston rod, piston, bottom, the top cap middle part is equipped with the through-hole, top cap and bottom and cylinder body form sealed chamber, sealed intracavity divide into sealed chamber one and sealed chamber two through the piston, the piston outer end is equipped with the rubber pad, the rubber pad is closely laminated with the cylinder body inner wall, the piston rod inserts through the through-hole in sealed chamber one, and through the bolt with piston connection, the piston is equipped with the choke valve by sealed chamber one's one end, the piston is equipped with the check valve by sealed chamber two's one end.

Preferably, the end surfaces of the piston, which are positioned in the first sealing cavity and the second sealing cavity, are provided with exhaust holes.

Preferably, the joints of the top cover and the bottom cover and the cylinder body are respectively provided with a sealing block.

Preferably, a first sealing ring is arranged in the middle of the first through hole, and a second sealing ring is arranged in the middle of the bottom cover.

Advantageous effects

According to the pneumatic buffer, through the combined use of the exhaust holes and the one-way valve, the buffer effect is achieved, gas circulates only in the cylinder body, the overall tightness of the pneumatic buffer is improved, the opening size of the throttle valve can be adjusted according to the load condition, the kinetic energy absorbed by the pneumatic buffer is determined, elastic force residues are avoided in any static state, and compression potential energy is avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic diagram of a cross-sectional piston motion structure according to the present utility model;

the correspondence between the reference numerals and the component names in the drawings is as follows:

1. a top cover; 2. a cylinder; 3. a piston rod; 4. a piston; 5. a bottom cover; 6. a through hole; 7. sealing the first cavity; 8. sealing the second cavity; 9. a rubber pad; 10. a throttle valve; 11. a one-way valve; 12. an exhaust hole; 13. a sealing block; 14. a first sealing ring; 15. a second sealing ring;

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

1-2, which are schematic structural views of a pneumatic buffer with good sealing performance according to a preferred embodiment of the present utility model;

in this embodiment, a pneumatic buffer that leakproofness is good, including top cap 1, cylinder body 2, piston rod 3, piston 4, bottom 5, top cap 1 middle part is equipped with through-hole 6, top cap 1 and bottom 5 and cylinder body 2 form sealed chamber, divide into sealed chamber one 7 and sealed chamber two 8 through piston 4 in the sealed chamber, the piston 4 outer end is equipped with rubber pad 9, rubber pad 9 closely laminates with cylinder body 2 inner wall, piston rod 3 inserts through-hole 6 in sealed chamber one 7, and through the bolt with piston 4 connects, piston 4 is equipped with choke valve 10 by sealed chamber one 7's one end, piston 4 is equipped with check valve 11 by sealed chamber two 8's one end.

In this embodiment, the end surfaces of the piston 4 located in the first sealing cavity 7 and the second sealing cavity 8 are provided with exhaust holes 12, the connection parts of the top cover 1, the bottom cover 5 and the cylinder body 2 are provided with sealing blocks 13, the middle part of the through hole 6 is provided with a first sealing ring 14, and the middle part of the bottom cover is provided with a second sealing ring 15.

The working principle of the utility model is as follows:

the piston 4 is provided with a one-way valve 11 and an exhaust hole 12, gas circulates between the first sealing cavity 7 and the second sealing cavity 8 under a certain pressure, when the pneumatic buffer is in a compression process, the piston rod 3 pushes the piston 4 to move towards the second sealing cavity 8, the one-way valve 11 is always in a closed state, gas can only flow into the first sealing cavity 7 through the exhaust hole 12, and the piston 4 slowly moves towards the second sealing cavity 8; when the pneumatic buffer is in a release process, the piston 4 moves towards the first sealing cavity 7, gas in the first sealing cavity 7 begins to be compressed, the gas flows into the second sealing cavity 8 through the exhaust hole 12, the one-way valve 11 is opened immediately when pressure is generated in the first sealing cavity 7, the gas in the first sealing cavity 7 quickly reaches the second sealing cavity 8 through the one-way valve 11, the piston 4 is accelerated to reset at the moment, the throttle valve 10 can adjust the opening size to determine the kinetic energy absorbed by the buffer, and the speed of the piston 4 when moving towards the second sealing cavity 8 is adjusted.

The foregoing is a further elaboration of the present utility model in connection with the detailed description, and it is not intended that the utility model be limited to the specific embodiments shown, but rather that a number of simple deductions or substitutions be made by one of ordinary skill in the art without departing from the spirit of the utility model, should be considered as falling within the scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a pneumatic buffer that leakproofness is good, includes top cap (1), cylinder body (2), piston rod (3), piston (4), bottom (5), its characterized in that: the novel sealing device is characterized in that a through hole (6) is formed in the middle of the top cover (1), the top cover (1) and the bottom cover (5) are connected with the cylinder body (2) to form a sealing cavity, the sealing cavity is divided into a sealing cavity I (7) and a sealing cavity II (8) through the piston (4), a rubber pad (9) is arranged at the outer end of the piston (4), the rubber pad (9) is tightly attached to the inner wall of the cylinder body (2), the piston rod (3) is inserted into the sealing cavity I (7) through the through hole (6), the piston rod is connected with the piston (4) through a bolt, a throttle valve (10) is arranged at one end of the piston (4) close to the sealing cavity I (7), and a one-way valve (11) is arranged at one end of the piston (4) close to the sealing cavity II (8).

2. A well-sealed pneumatic buffer as claimed in claim 1, wherein: the end surfaces of the piston (4) positioned in the first sealing cavity (7) and the second sealing cavity (8) are respectively provided with an exhaust hole (12).

3. A well-sealed pneumatic buffer as claimed in claim 1, wherein: the joints of the top cover (1) and the bottom cover (5) and the cylinder body (2) are respectively provided with a sealing block (13).

4. A well-sealed pneumatic buffer as claimed in claim 1, wherein: the middle part of the through hole (6) is provided with a first sealing ring (14), and the middle part of the bottom cover is provided with a second sealing ring (15).