Buffer

Abstract

The utility model provides a buffer which comprises a cylinder body, a piston, a supporting fixing piece and an elastic sleeve. The piston divides the liquid cavity into a pressure cavity and a non-pressure cavity; the elastic sleeve is arranged in the non-pressure cavity; the elastic sleeve is cylindrical, and an annular air chamber is defined between the outer side face of the elastic sleeve and the inner side wall of the cylinder body. The annular air chamber is communicated with the outside of the cylinder body through an air path; the supporting and fixing part is arranged in the annular air chamber, a liquid storage cavity is formed in the center of the elastic sleeve, when the piston reciprocates in the liquid cavity, the viscous liquid enters and exits the liquid storage cavity, and the elastic sleeve bulges or shrinks along with the liquid storage cavity, so that the volume of the liquid storage cavity is adjusted. The supporting and fixing piece is arranged in the annular air chamber, when the elastic sleeve is compressed, the elastic sleeve is effectively supported and fixed through the supporting and fixing piece, the structure is more reliable, the working efficiency is higher, and the service life of the whole buffer is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of shock-absorbing components, in particular to a novel buffer. Background Art

[0002] Existing shock absorbers typically consist of a cylinder and a guide rod. A valve plate is mounted at the guide rod's head. The movement of this valve plate opens and closes the fluid flow path between the pressure chamber and the non-pressure chamber. However, the valve plate, which slides on the guide rod as the piston moves, can tilt or get caught on other components, causing it to malfunction and resulting in low reliability. Utility Model Content

[0003] The purpose of the present invention is to provide a buffer to solve at least one of the above-mentioned technical problems existing in the prior art.

[0004] To solve the above technical problems, the utility model provides a buffer, comprising: a cylinder, a piston, a support fixing member and an elastic sleeve;

[0005] The cylinder body is provided with a liquid cavity formed for sealing a viscous liquid;

[0006] The piston is slidably disposed in the liquid chamber; the piston divides the liquid chamber into a pressure chamber and a non-pressure chamber;

[0007] The elastic sleeve is arranged in the non-pressure chamber; the elastic sleeve is cylindrical, and an annular air chamber is enclosed between the outer side of the elastic sleeve and the inner wall of the cylinder body; the annular air chamber is connected to the outside of the cylinder body through an air path;

[0008] The supporting fixing member is in the shape of a circular sleeve and is arranged in the annular air chamber, and is used to fix the two ends of the elastic sleeve in the axial direction of the cylinder body, and to support the middle part of the elastic sleeve in the axial direction of the cylinder body when the elastic sleeve is compressed;

[0009] A liquid storage cavity is provided at the center of the elastic sleeve. When the piston reciprocates in the liquid cavity, viscous liquid enters and exits the liquid storage cavity, and the elastic sleeve swells or contracts accordingly, thereby adjusting the volume of the liquid storage cavity.

[0010] Compared with the prior art, the supporting fixing member in this application is arranged in the annular air chamber. When the elastic sleeve is compressed, the elastic sleeve is effectively supported and fixed by the supporting fixing member. The structure is more reliable, the efficiency is higher when doing work, and the life of the entire buffer is greatly extended.

[0011] Furthermore, before the cylinder is filled with the viscous liquid and when the liquid chamber is in a vacuum state, the elastic sleeve is arranged to bulge toward the liquid storage chamber.

[0012] Furthermore, in an original state, the elastic sleeve is thin in the middle and thick at both ends, and the side wall of the elastic sleeve bulges toward one side of the liquid storage cavity (ie, inward).

[0013] Furthermore, in the original state, the elastic sleeve is straight-cylindrical as a whole, that is, the liquid storage chamber is straight-cylindrical. Before the viscous liquid is filled, the liquid chamber is evacuated, and the pressure in the annular air chamber is greater than the pressure in the liquid chamber (the same as the liquid storage chamber), thereby forcing the elastic sleeve to bulge toward the liquid storage chamber.

[0014] Specifically, since both ends of the elastic sleeve are fixed, the middle portion thereof is elastically deformed and bulges toward the liquid storage chamber.

[0015] The elastic sleeve bulges inwards, at which point the volume of the liquid storage cavity is at its smallest and the internal space of the annular air chamber is at its largest, preparing for later filling with viscous liquid and normal operation.

[0016] Furthermore, the supporting fixing member is hollowed out in the middle, so that the gas in the annular air chamber can come into contact with the outer side surface of the elastic sleeve through the hollowing.

[0017] Furthermore, it also includes a piston rod, the top end of which extends into the cylinder body from the cylinder port on the side of the non-pressure chamber and is fixedly connected to the piston after passing through the liquid storage chamber.

[0018] Furthermore, it also includes a sealing member for sealing the cylinder port of the cylinder body, and an air path communicating with the inside and outside of the annular air chamber is provided inside the sealing member or between the sealing member and the cylinder body.

[0019] Furthermore, an axial hole is provided in the middle of the sealing member for the passage of the piston rod.

[0020] Furthermore, the outer end of the elastic sleeve seals the gap between the piston rod and the supporting fixing member and the sealing member to prevent leakage of the viscous liquid.

[0021] Furthermore, the edge of the inner end of the elastic sleeve is turned outward to seal the gap between the supporting fixture and the cylinder body, preventing the gas in the annular air chamber from entering the liquid cavity and preventing the viscous liquid from entering the annular air chamber.

[0022] Furthermore, it also includes a sphere (valve ball), and a passage connecting the pressure chamber and the non-pressure chamber is provided in the piston; the passage is provided with a ball seat structure on one side of the pressure chamber, and the sphere is movably arranged in the pressure chamber, and is adapted to the ball seat structure to open and close the passage or to adjust the flow rate and flow of the viscous liquid through the passage by adjusting the cross-sectional size of the passage at the ball seat structure.

[0023] Furthermore, the ball seat structure is a frustum-shaped chamber provided on the piston at one side of the pressure chamber.

[0024] Furthermore, the piston is provided with a limiting structure on the outer side of the frustum-shaped chamber close to the pressure chamber to prevent the ball from being completely separated from the piston.

[0025] Furthermore, the limiting structure is a accommodating cavity connected to the frustum-shaped cavity, and the sphere can be slid back and forth between the frustum-shaped cavity and the accommodating cavity. The accommodating cavity is provided with a limiting protrusion or a limiting pin at the outer edge to prevent the sphere from detaching.

[0026] Furthermore, the limiting structure is a cage-shaped body arranged outside the frustum-shaped cavity.

[0027] Furthermore, a return spring is included, which is arranged in the pressure chamber. Two ends of the return spring respectively abut against the piston and the cylinder body, tending to force the piston to move toward the non-pressure chamber side.

[0028] Furthermore, a liquid injection port is provided at the bottom of the cylinder body, and a plug is detachably provided on the liquid injection port.

[0029] By adopting the above technical solution, the utility model has the following beneficial effects:

[0030] The utility model provides a buffer, wherein the supporting fixing piece is arranged in the annular air chamber. When the elastic sleeve is compressed, the elastic sleeve is effectively supported and fixed by the supporting fixing piece, the structure is more reliable, the efficiency when doing work is higher, and the service life of the entire buffer is greatly extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A three-dimensional diagram of a buffer provided by an embodiment of the present utility model;

[0033] Figure 2 for Figure 1 A front view of the buffer shown;

[0034] Figure 3 for Figure 2 AA cross-sectional view of the buffer shown;

[0035] Figure 4 for Figure 3 A partial enlarged view of point C in the middle;

[0036] Figure 5 This is a front view of the piston in the embodiment of the utility model;

[0037] Figure 6 for Figure 5 Middle BB cross-section;

[0038] Figure 7 A first-person perspective of the piston;

[0039] Figure 8 is a stereoscopic image of the piston from a second perspective;

[0040] Figure 9 An exploded view of a buffer provided in an embodiment of the present utility model;

[0041] Figure 10 This is a front view of the elastic sleeve in the embodiment;

[0042] Figure 11 is a three-dimensional diagram of the elastic sleeve;

[0043] Figure 12 is a three-dimensional diagram of a supporting fixture in an embodiment;

[0044] Figure 13 This is a state diagram of the elastic sleeve under negative pressure before the buffer is filled with viscous liquid.

[0045] Reference numerals:

[0046] 1-sphere; 10-cylinder body; 11-pressure chamber; 12-non-pressure chamber; 15-liquid filling port; 16-plug; 20-piston; 22-ball seat structure; 21-passage; 30-piston rod; 40-return spring; 50-support fixing member; 51-hollowing; 60-elastic sleeve; 61-annular air chamber; 62-liquid storage chamber; 70-sealing member. DETAILED DESCRIPTION

[0047] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0050] The present invention will be further explained below in conjunction with specific implementation methods.

[0051] like Figure 1-13 As shown, the buffer provided in this embodiment includes: a cylinder 10 , a piston 20 , a supporting fixture 50 and an elastic sleeve 60 .

[0052] The cylinder body 10 is provided with a liquid cavity formed for sealing a viscous liquid; the piston 20 is slidably provided in the liquid cavity; the piston 20 divides the liquid cavity into a pressure cavity 11 and a non-pressure cavity 12; the elastic sleeve 60 is provided in the non-pressure cavity 12; the elastic sleeve 60 is cylindrical, and an annular air chamber 61 is enclosed between the outer side surface of the elastic sleeve 60 and the inner side wall of the cylinder body 10; the annular air chamber 61 is connected to the outside of the cylinder body 10 through an air path.

[0053] The supporting fixing member 50 is in the shape of a circular sleeve and is arranged in the annular air chamber 61 for fixing the two axial ends of the elastic sleeve 60 in the cylinder body 10 and supporting the middle part of the elastic sleeve 60 in the axial direction of the cylinder body 10 when the elastic sleeve 60 is compressed.

[0054] A liquid storage chamber 62 is provided at the center of the elastic sleeve 60 . When the piston 20 reciprocates in the liquid chamber, viscous liquid enters and exits the liquid storage chamber 62 , and the elastic sleeve 60 swells or contracts accordingly, thereby adjusting the volume of the liquid storage chamber 62 .

[0055] Compared with the prior art, the supporting fixing member 50 in the present application is arranged in the annular air chamber 61. When the elastic sleeve 60 is compressed, the elastic sleeve 60 is effectively supported and fixed by the supporting fixing member 50. The structure is more reliable, the efficiency is higher when doing work, and the life of the entire buffer is greatly extended.

[0056] See also Figure 13 As shown, before the cylinder 10 is filled with the viscous liquid and the liquid chamber is evacuated, the elastic sleeve 60 is arranged to bulge toward the liquid storage chamber 62. Preferably, in its original state, the elastic sleeve 60 is generally straight, i.e., the liquid storage chamber 62 is straight. Before the viscous liquid is filled and the liquid chamber is evacuated, the pressure within the annular air chamber 61 is greater than the pressure within the liquid chamber, thereby forcing the elastic sleeve 60 to bulge toward the liquid storage chamber 62. Specifically, because the ends of the elastic sleeve 60 are fixed, its middle portion elastically deforms and bulges toward the liquid storage chamber 62.

[0057] Alternatively, in the original state, the elastic sleeve 60 is thin in the middle and thick at both ends, and the side wall of the elastic sleeve 60 bulges toward the liquid storage cavity 62 (ie, inward).

[0058] The elastic sleeve 60 bulges inwards, at which point the volume of the liquid storage cavity 62 is at its smallest and the inner space of the annular air chamber 61 is at its largest, preparing for later filling with viscous liquid and normal operation.

[0059] See also Figure 12 As shown, a hollow 51 , i.e., a gas through hole, is provided in the middle of the supporting fixing member 50 , so that the gas in the annular air chamber 61 can contact the outer side of the elastic sleeve 60 through the hollow 51 .

[0060] This embodiment further includes a piston rod 30 , the top end of which extends into the cylinder body 10 from the cylinder port on the side of the non-pressure chamber 12 , and is fixedly connected to the piston 20 after passing through the liquid storage chamber 62 .

[0061] See also Figure 3 and Figure 4 As shown, the cylinder body 10 further includes a sealing member 70 for sealing the cylinder port, and an air path is provided in the sealing member 70 or between the sealing member 70 and the cylinder body 10 to connect the inside and outside of the annular air chamber 61. An axial hole is provided in the middle of the sealing member 70 for the passage of the piston rod 30.

[0062] Preferably, the outer end of the elastic sleeve 60 seals the gap between the piston rod 30 and the supporting fixture 50 and the sealing member 70 to prevent leakage of the viscous liquid. The inner end of the elastic sleeve 60 has an outwardly turned edge portion, sealing the gap between the supporting fixture 50 and the cylinder body 10, preventing the gas in the annular air chamber 61 from entering the liquid cavity, and preventing the viscous liquid from entering the annular air chamber 61.

[0063] Preferably, the piston 20 further includes a ball 1 (ie, a valve ball), and a passage 21 is provided in the piston 20 to connect the pressure chamber 11 and the non-pressure chamber 12; see Figure 6-8 As shown, the passage 21 is provided with a ball seat structure 22 on one side of the pressure chamber 11, and the ball 1 is movably arranged in the pressure chamber 11, and is adapted to the ball seat structure 22 for opening and closing the passage 21 or adjusting the cross-sectional size of the passage 21 at the ball seat structure 22 to thereby adjust the flow rate and flow of the viscous liquid through the passage 21.

[0064] In this embodiment, the ball seat structure 22 is a frustoconical chamber provided on the piston 20 on one side of the pressure chamber 11 .

[0065] Furthermore, the piston 20 is provided with a retaining structure on the outer side of the frustum-shaped chamber near the pressure chamber 11 to prevent the ball 1 from completely separating from the piston 20. The retaining structure can be a receiving chamber connected to the frustum-shaped chamber, with the ball 1 being able to slide back and forth between the two chambers. The receiving chamber is provided with a retaining protrusion or a retaining pin at the outer edge to prevent the ball 1 from separating. Alternatively, the retaining structure can be a cage-like structure provided outside the frustum-shaped chamber.

[0066] This embodiment further includes a return spring 40 , which is disposed in the pressure chamber 11 . Two ends of the return spring 40 respectively abut against the piston 20 and the cylinder 10 , tending to force the piston 20 to move toward the non-pressure chamber 12 .

[0067] Furthermore, a liquid injection port 15 is provided at the bottom of the cylinder body 10 , and a plug 16 is detachably provided on the liquid injection port 15 .

[0068] The utility model provides a buffer, in which the supporting fixing member 50 is arranged in the annular air chamber 61. When the elastic sleeve 60 is compressed, the elastic sleeve 60 is effectively supported and fixed by the supporting fixing member 50, the structure is more reliable, the efficiency is higher when doing work, and the service life of the entire buffer is greatly extended.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A buffer, characterized in that: include: Cylinder body, piston, supporting fixtures and elastic sleeve; The cylinder body is provided with a liquid cavity formed for sealing a viscous liquid; The piston is slidably disposed in the liquid chamber; the piston divides the liquid chamber into a pressure chamber and a non-pressure chamber; The elastic sleeve is arranged in the non-pressure chamber; the elastic sleeve is cylindrical, and an annular air chamber is enclosed between the outer side of the elastic sleeve and the inner wall of the cylinder body; the annular air chamber is connected to the outside of the cylinder body through an air path; The supporting fixing member is in the shape of a circular sleeve and is arranged in the annular air chamber, and is used to fix the two ends of the elastic sleeve in the axial direction of the cylinder body, and to support the middle part of the elastic sleeve in the axial direction of the cylinder body when the elastic sleeve is compressed; A liquid storage cavity is provided at the center of the elastic sleeve. When the piston reciprocates in the liquid cavity, viscous liquid enters and exits the liquid storage cavity, and the elastic sleeve swells or contracts accordingly, thereby adjusting the volume of the liquid storage cavity.

2. The buffer according to claim 1, characterized in that Before the cylinder is filled with the viscous liquid and the liquid chamber is in a vacuum state, the elastic sleeve is arranged to bulge toward the liquid storage chamber.

3. The buffer according to claim 2, characterized in that In an original state, the elastic sleeve is thin in the middle and thick at both ends, and the side wall of the elastic sleeve bulges toward one side of the liquid storage cavity.

4. The buffer according to claim 2, characterized in that In the original state, the elastic sleeve is straight-cylindrical as a whole, that is, the liquid storage cavity is straight-cylindrical. Before the viscous liquid is filled, the liquid cavity is evacuated, and the pressure in the annular air chamber is greater than the pressure in the liquid cavity, thereby forcing the elastic sleeve to bulge toward the liquid storage cavity.

5. The buffer according to claim 1, characterized in that The middle of the supporting fixing member is hollowed out so that the gas in the annular air chamber can contact the outer side surface of the elastic sleeve through the hollowing.

6. The buffer according to claim 1, characterized in that It also includes a piston rod, the top end of which extends into the cylinder body from the cylinder port on the side of the non-pressure chamber and is fixedly connected to the piston after passing through the liquid storage chamber.

7. The buffer according to claim 6, characterized in that It also includes a sealing member for sealing the cylinder port of the cylinder body, and an air path communicating with the inside and outside of the annular air chamber is provided inside the sealing member or between the sealing member and the cylinder body.

8. The buffer according to claim 7, characterized in that An axial hole is provided in the middle of the sealing member for the passage of the piston rod.

9. The buffer according to claim 7, characterized in that The outer end of the elastic sleeve seals the gap between the piston rod and the supporting fixing member and the sealing member to prevent leakage of the viscous liquid.

10. The buffer according to claim 1, characterized in that The edge of the inner end of the elastic sleeve is turned outward to seal the gap between the supporting fixing member and the cylinder body, preventing the gas in the annular air chamber from entering the liquid cavity and preventing the viscous liquid from entering the annular air chamber.

11. The buffer according to claim 1, characterized in that It also includes a spherical body, and a passage connecting the pressure chamber and the non-pressure chamber is provided in the piston; a ball seat structure is provided on one side of the pressure chamber of the passage, and the sphere is movably provided in the pressure chamber, and is adapted to the ball seat structure for opening and closing the passage or adjusting the cross-sectional size of the passage at the ball seat structure to thereby adjust the flow rate and flow of the viscous liquid through the passage.

12. The buffer according to claim 11, characterized in that The ball seat structure is a frustum-shaped chamber arranged on the piston at one side of the pressure chamber.

13. The buffer according to claim 12, characterized in that The piston is provided with a limiting structure on the outer side of the frustum-shaped chamber close to the pressure chamber to prevent the ball from being completely separated from the piston.

14. The buffer according to claim 13, characterized in that The limiting structure is a accommodating cavity connected to the frustum-shaped cavity. The sphere can be slid back and forth between the frustum-shaped cavity and the accommodating cavity. The accommodating cavity is provided with a limiting protrusion or a limiting pin at the outer edge to prevent the sphere from detaching.

15. The buffer according to claim 13, characterized in that The limiting structure is a cage-shaped body arranged outside the frustum-shaped cavity.

16. The buffer according to claim 1, wherein It also includes a return spring, which is arranged in the pressure chamber. Two ends of the return spring respectively abut against the piston and the cylinder body, tending to force the piston to move toward the non-pressure chamber side.

17. The buffer according to claim 1, wherein The bottom of the cylinder body is provided with a liquid injection port, and a plug is detachably provided on the liquid injection port.

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