Buffer

Abstract

The utility model provides a buffer. The buffer comprises a cylinder body, a piston and a ball body, a liquid cavity used for containing viscous liquid is formed in the cylinder body. The piston is arranged in the liquid cavity in a sliding manner; the piston divides the liquid cavity into a pressure cavity and a non-pressure cavity; a passage communicated with the pressure cavity and the non-pressure cavity is arranged in the piston; the passage is provided with a ball seat structure on one side of the pressure cavity, and the ball body is movably arranged in the pressure cavity and is matched with the ball seat structure to open and close the passage or adjust the flow speed and flow of the viscous liquid passing through the passage by adjusting the size of the cross section of the passage at the ball seat structure. According to the utility model, the structure is more compact, and the extruded area of the elastic air bag is larger, so that the contraction ratio is larger under the same liquid pressure, and the adjusting capability is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a damping component technical field especially a novel buffer. BACKGROUND

[0002] At present, the structure of the existing buffer usually comprises a cylinder body and a guide rod, a valve plate is arranged at the head of the guide rod, and the valve plate is moved to open and close the liquid flow path between the pressure chamber side and the non-pressure chamber side. However, the valve plate that slides and moves on the guide rod tilts or hooks on other component parts with the movement of the piston, thereby causing the component to fail to work normally and the reliability is low. SUMMARY

[0003] The utility model discloses a buffer to solve at least one above-mentioned technical problem in prior art.

[0004] To solve the above technical problem, the utility model provides a buffer, which comprises a cylinder body, a piston and a ball (valve ball).

[0005] A liquid cavity for enclosing viscous liquid is arranged in the cylinder body.

[0006] The piston is slidably arranged in the liquid cavity; the piston divides the liquid cavity into a pressure cavity and a non-pressure cavity.

[0007] A passage is arranged in the piston and communicates the pressure cavity and the non-pressure cavity; a ball seat structure is arranged at the side of the pressure cavity of the passage; the ball is movably arranged in the pressure cavity and is matched with the ball seat structure to open and close the passage or adjust the cross-sectional size of the passage at the ball seat structure to adjust the flow rate and flow of the viscous liquid through the passage.

[0008] Further, the ball seat structure is a conical frustum chamber arranged at the side of the pressure cavity of the piston.

[0009] Further, the piston is provided with a limiting structure at the outside of the conical frustum chamber close to the pressure cavity to prevent the ball from completely separating from the piston.

[0010] Further, the limiting structure is a containing cavity in communication with the conical frustum chamber, the ball is reciprocally and slidably arranged between the conical frustum chamber and the containing cavity, and the containing cavity is provided with a limiting protrusion or a limiting pin at the outside opening to prevent the ball from separating.

[0011] Further, the limiting structure is a cage arranged at the outside of the conical frustum chamber.

[0012] Further, a reset spring is arranged in the pressure cavity, and the two ends of the reset spring are respectively abutted against the piston and the cylinder, and the reset spring tends to force the piston to move to the side of the non-pressure cavity.

[0013] Further, an elastic air bag is arranged in the non-pressure cavity, and the elastic air bag is communicated with the outside of the cylinder through an air passage; in the radial direction of the cylinder and the piston, the elastic air bag comprises an outer side and an inner side which are arranged in opposite directions, when the piston moves to the side of the non-pressure cavity, the non-pressure cavity is compressed, the viscous liquid at least presses the elastic air bag from the two sides of the outer side and the inner side, and the elastic air bag is forced to be shrunk, the gas in the elastic air bag is discharged through the air passage, and then the containing space in the non-pressure cavity is increased; when the piston moves to the side of the pressure cavity, the elastic air bag is inflated under the action of its elasticity, and then the containing space in the non-pressure cavity is reduced.

[0014] The elastic air bag in the application is squeezed in a larger area, so that the shrinkage is also larger under the same liquid pressure, and the adjusting capacity is also greatly improved.

[0015] Further, a piston rod is arranged, and the top end of the piston rod extends into the cylinder from the cylinder port on the side of the non-pressure cavity, and the piston rod is fixedly connected with the piston.

[0016] Further, the elastic air bag is annular as a whole, and comprises an outer cylinder part and an inner cylinder part; the outer cylinder part and the inner cylinder part enclose an annular cavity.

[0017] Further, the annular cavity is provided with an annular opening on the side away from the piston; and a sealing member is further arranged to block the annular opening, and the air passage which communicates the inside and outside of the annular cavity is arranged in the sealing member or between the sealing member and the cylinder.

[0018] Preferably, the sealing member comprises an end cover part and an annular protruding part, and the annular protruding part is inserted into and blocks the annular opening; further preferably, the end cover part also blocks the cylinder port of the cylinder, and a shaft hole is arranged in the middle of the end cover part for the piston rod to pass through.

[0019] Further, the rim of the outer cylinder part is inserted into and seals the gap between the annular protruding part and the cylinder.

[0020] Further, the rim of the inner cylinder part is inserted into and seals the gap between the annular protruding part and the piston rod.

[0021] Further, the elastic air bag can also be a bag-shaped body in a strip shape, and a plurality of bag-shaped bodies are uniformly and spacedly arranged in the circumferential direction of the piston rod.

[0022] Further, a liquid storage member is further arranged, and the liquid storage member comprises an end plate part and a guide sleeve part.

[0023] The liquid storage member is arranged in the non-pressure cavity, and the end plate part is arranged close to the piston; the top end of the piston rod is fixedly connected with the piston after passing through the guide hole in the middle of the guide sleeve part;

[0024] The liquid storage member and the cylinder body enclose an annular liquid storage cavity, and the elastic air bag is arranged in the liquid storage cavity.

[0025] The end plate part is provided with a through hole for the viscous liquid to enter or exit the liquid storage cavity.

[0026] The guide hole in the middle of the guide sleeve part is in guiding cooperation with the piston rod, so that the piston rod can stably and flexibly move.

[0027] Further, the outer side of the guide sleeve part is provided with a sunken platform; the mouth edge of the inner cylinder part is provided with an annular insertion slot on one side of the liquid storage member, the outer side end of the guide sleeve part is inserted into the annular insertion slot, and the inner side wall of the annular insertion slot is inserted into the sunken platform.

[0028] The guide sleeve part and the mouth edge of the inner cylinder part form an insertion structure, so that the mouth edge of the elastic air bag is effectively supported, the structure is more compact, and the sealing performance of the overall structure is improved.

[0029] Further, the bottom of the cylinder body is provided with a liquid injection port, and a plug is detachably arranged on the liquid injection port.

[0030] By adopting the above technical scheme, the buffer has the following beneficial effects:

[0031] The buffer has a more compact structure, the area of the elastic air bag that is extruded is larger, so that the contraction ratio is also larger under the same liquid pressure, and the adjustment capacity is also greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the specific embodiments of the present application or the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0033] Figure 1 A perspective view of the buffer provided by the embodiments of the present application;

[0034] Figure 2 A front view of the buffer shown in FIG. Figure 1

[0035] Figure 3 A perspective view of the buffer shown in FIG.​Figure 2 AA sectional view of the buffer shown;

[0036] Figure 4 An exploded view of the buffer provided by the embodiment of the present application;

[0037] Figure 5 A Figure 3 enlarged view of a portion at C;

[0038] Figure 6 A front view of the piston in the embodiment of the present application;

[0039] Figure 7 A Figure 6 sectional view at BB;

[0040] Figure 8 A perspective view of the piston from a first perspective;

[0041] Figure 9 A perspective view of the piston from a second perspective;

[0042] Figure 10 A perspective view of the elastic air bag in the embodiment;

[0043] Figure 11 A perspective view of the elastic air bag from a second perspective;

[0044] Figure 12 A Figure 3 enlarged view of a portion at D.

[0045] Reference signs:

[0046] 10 - cylinder; 11 - pressure chamber; 12 - non-pressure chamber; 15 - liquid injection port; 16 - plug; 20 - piston; 21 - passage; 22 - ball seat structure; 30 - piston rod; 40 - return spring; 50 - ball; 60 - elastic air bag; 61 - outer side surface; 62 - inner side surface; 63 - outer cylinder portion; 64 - inner cylinder portion; 65 - annular cavity; 65a - annular opening; 66 - annular slot; 70 - sealing member; 71 - end cover portion; 72 - annular protrusion portion; 80 - liquid storage member; 81 - end plate portion; 82 - guide sleeve portion; 83 - through hole; 84 - guide hole; 85 - sunken platform. DETAILED DESCRIPTION

[0047] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the utility model, it should be pointed out that, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, and can also be detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0050] The utility model will be further explained and described in combination with specific embodiments.

[0051] As Figures 1-12 shown, the utility model provides a buffer, including: cylinder 10, piston 20 and ball 50 (i.e. a valve ball);The cylinder 10 is provided with the liquid cavity for enclosing viscous liquid and forming in;The piston 20 is slidably arranged in the liquid cavity;Piston 20 divides the liquid cavity into pressure chamber 11 and non-pressure chamber 12;

[0052] The piston 20 is provided with a passage 21 connecting the pressure chamber 11 and the non-pressure chamber 12; the passage 21 is provided with a ball seat structure 22 on the side of the pressure chamber 11, and the ball 50 is movably arranged in the pressure chamber 11 and 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 adjust the flow rate and flow of the viscous liquid passing through the passage 21. Specifically, the ball seat structure 22 in the present application is a frustum-shaped chamber arranged on the piston 20 on the side of the pressure chamber 11. During the reciprocating movement of the piston 20, the reverse flow of the viscous liquid pushes the ball 50 away from or close to the frustum-shaped chamber, and the gap between the ball 50 and the side wall of the frustum-shaped chamber also increases or decreases, thereby achieving the purpose of adjusting the flow rate and flow. When the buffer achieves the effect of buffering and shock absorption, under the action of the piston rod 30 and the external load, the piston 20 moves to the side of the pressure chamber 11 and compresses the return spring 40, the reverse flow of the viscous liquid pushes the ball 50 close to the side wall of the frustum-shaped chamber, the effective cross section of the passage 21 decreases, that is, a more and more narrow fluid passage is formed, and the flow of the viscous liquid in the direction of the non-pressure chamber 12 is blocked, thereby achieving the effect of buffering. When the piston 20 is reset under the action of the return spring 40, the reverse flow of the viscous liquid pushes the ball 50 away from the side wall of the frustum-shaped chamber, the effective cross section of the passage 21 increases, the effective cross section of the passage 21 increases, and the viscous liquid can flow very smoothly in the direction of the pressure chamber 11.

[0053] Preferably, the piston 20 is provided with a limiting structure on the outside of the frustum-shaped chamber close to the pressure chamber 11 to prevent the ball 50 from completely separating from the piston 20. For example, the limiting structure is a containing cavity in communication with the frustum-shaped chamber, and the ball 50 is reciprocally arranged between the frustum-shaped chamber and the containing cavity, and the containing cavity is provided with a limiting protrusion or a limiting pin at the outside opening to prevent the ball 50 from separating. Alternatively, the limiting structure is a cage arranged on the outside of the frustum-shaped chamber.

[0054] As shown in Figure 3 The reset spring 40 is arranged in the pressure chamber 11, and the two ends of the reset spring 40 abut against the piston 20 and the cylinder body 10 respectively, tending to force the piston 20 to move to the side of the non-pressure chamber 12.

[0055] Further, the non-pressure chamber 12 is provided with an elastic air bag 60, and the elastic air bag 60 is in communication with the outside of the cylinder body 10 through an air path. Figure 5As shown, in the radial direction of the cylinder 10 and the piston 20, the elastic air bag 60 comprises an outer side 61 and an inner side 62 arranged oppositely and spaced apart, when the piston 20 moves to the side of the non-pressure chamber 12, the non-pressure chamber 12 is compressed, the viscous liquid presses the elastic air bag 60 from at least two sides of the outer side 61 and the inner side 62, forcing the elastic air bag 60 to be contracted, the gas in the elastic air bag 60 is discharged through the gas path, and then used to increase the containing space in the non-pressure chamber 12; when the piston 20 moves to the side of the pressure chamber 11, the elastic air bag 60 is inflated under the action of its own elasticity, and then used to reduce the containing space in the non-pressure chamber 12.

[0056] The elastic air bag 60 in the present application is squeezed in a larger area, so that the contraction is also larger under the same liquid pressure, and the adjustment capacity is also greatly improved.

[0057] The present embodiment also comprises a piston rod 30, the top end of the piston rod 30 extends into the cylinder 10 from the cylinder port on the side of the non-pressure chamber 12, and is detachably fixedly connected with the piston 20. The non-pressure chamber 12 is a rod chamber, and the pressure chamber 11 is a rodless chamber.

[0058] Further, the elastic air bag 60 is annular as a whole, comprising an outer cylinder portion 63 for forming the outer side 61 and an inner cylinder portion 64 for forming the inner side 62; the outer cylinder portion 63 and the inner cylinder portion 64 enclose an annular cavity 65. The annular cavity 65 is provided with an annular opening 65a on the side away from the piston 20; and further comprising a sealing member 70 for plugging the annular opening 65a, and the gas path for communicating the inside and outside of the annular cavity 65 is arranged in the sealing member 70 or between the sealing member 70 and the cylinder 10.

[0059] Preferably, the sealing member 70 comprises an end cover portion 71 and an annular protruding portion 72, the annular protruding portion 72 is inserted and plugged into the annular opening 65a; further preferably, the end cover portion 71 simultaneously plugs the cylinder port of the cylinder 10, and a shaft hole is arranged in the middle of the end cover portion 71 for the piston rod 30 to pass through.

[0060] More preferably, the mouth edge of the outer cylinder portion 63 of the elastic air bag 60 is inserted and sealed into the gap between the annular protruding portion 72 and the cylinder 10. The mouth edge of the inner cylinder portion 64 is inserted and sealed into the gap between the annular protruding portion 72 and the piston rod 30.

[0061] Alternatively, the elastic air bag 60 can also be a long strip-shaped bag body, and a plurality of bag bodies are uniformly and spaced arranged in the circumferential direction of the piston rod 30.

[0062] This embodiment may further include a liquid storage component 80, which includes an end plate portion 81 and a guide sleeve portion 82. The liquid storage component 80 is disposed within the non-pressure chamber 12, and the end plate portion 81 is disposed close to the piston 20. The top end of the piston rod 30 is fixedly connected to the piston 20 after passing through the guide hole in the middle of the guide sleeve portion 82. The liquid storage component 80 and the cylinder body 10 enclose an annular liquid storage cavity, and the elastic airbag 60 is disposed within the liquid storage cavity. The end plate portion 81 is provided with a through hole 83 for viscous liquid to enter and exit the liquid storage cavity. The guide hole 84 in the middle of the guide sleeve portion 82 forms a guiding engagement with the piston rod 30, ensuring that the piston rod 30 moves smoothly in and out. In addition, the end plate portion 81 can also serve as a stroke limiting structure for the piston 20 on the opening side of the cylinder body 10.

[0063] Furthermore, such as Figure 12 As shown, a recessed platform 85 is provided at the outer edge of the guide sleeve 82; an annular slot 66 is provided at the edge of the inner cylinder 64 on one side of the liquid storage component 80. The outer end of the guide sleeve 82 is inserted into the annular slot 66, and the inner sidewall of the annular slot 66 is inserted into the recessed platform 85. The guide sleeve 82 and the edge of the inner cylinder 64 form an interlocking structure, providing effective support for the edge of the elastic airbag 60, making the structure more compact and improving the overall sealing performance.

[0064] Additionally, the bottom of the cylinder body 10 is provided with a liquid injection port 15, and a plug 16 is detachably provided on the liquid injection port 15.

[0065] The structure of this utility model is more compact, and the area of ​​the elastic airbag 60 that is compressed is larger, so the contraction ratio is also greater under the same liquid pressure, and the adjustment capability is also greatly improved.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A buffer, characterized by Comprise: cylinder, piston and ball; a liquid cavity is formed by enclosing viscous liquid in the cylinder; the piston is slidably arranged in the liquid cavity; the piston divides the liquid cavity into pressure cavity and non-pressure cavity; a passageway is arranged in the piston to communicate the pressure cavity and the non-pressure cavity; the passageway is provided with a ball seat structure on the side of the pressure cavity, and the ball is movably arranged in the pressure cavity and matched with the ball seat structure to open or close the passageway or adjust the flow rate and flow of viscous liquid through the passageway by adjusting the cross-sectional size of the passageway at the ball seat structure.

2. The bumper of claim 1, wherein, The ball seat structure is a frustum-shaped chamber arranged on the piston on the side of the pressure cavity.

3. The bumper of claim 2, wherein, The piston is provided with a limiting structure on the outside of the frustum-shaped chamber close to the pressure cavity to prevent the ball from completely separating from the piston.

4. The bumper of claim 3, wherein, The limiting structure is a containing cavity in communication with the frustum-shaped chamber, and the ball is reciprocally and slidably arranged between the frustum-shaped chamber and the containing cavity, and the containing cavity is provided with a limiting protrusion or limiting pin at the outside port to prevent the ball from separating.

5. The bumper of claim 3, wherein, The limiting structure is a cage arranged on the outside of the frustum-shaped chamber.

6. The bumper of claim 1, wherein, Further comprising a reset spring arranged in the pressure cavity, and the two ends of the reset spring abut against the piston and the cylinder respectively to tend to force the piston to move to the side of the non-pressure cavity.

7. The bumper of claim 1, wherein, An elastic air bag is arranged in the non-pressure cavity and communicates with the outside of the cylinder through an air path; in the radial direction of the cylinder and the piston, the elastic air bag comprises an outer side and an inner side arranged in opposite directions, and when the piston moves to the side of the non-pressure cavity, the non-pressure cavity is compressed, the viscous liquid at least presses the elastic air bag from the two sides of the outer side and the inner side, forcing the elastic air bag to be contracted, the gas in the elastic air bag is discharged through the air path, thereby increasing the containing space in the non-pressure cavity; when the piston moves to the side of the pressure cavity, the elastic air bag is inflated under the action of its own elasticity, thereby reducing the containing space in the non-pressure cavity.

8. The bumper of claim 7, wherein, Further comprising a piston rod, the top end of the piston rod extends into the cylinder from the cylinder port on the side of the non-pressure cavity and is fixedly connected with the piston.

9. The bumper of claim 8, wherein, The elastic air bag is annular as a whole and comprises an outer cylinder part and an inner cylinder part; the outer cylinder part and the inner cylinder part enclose an annular cavity.

10. The bumper of claim 9, wherein, The annular cavity is provided with an annular opening on the side away from the piston; and further comprising a sealing member for sealing the annular opening, and the air path for communicating the inside and outside of the annular cavity is arranged in the sealing member or between the sealing member and the cylinder.

11. The bumper of claim 10, wherein, The sealing member comprises an end cover part and an annular protruding part, and the annular protruding part inserts and seals the annular opening; the end cover part simultaneously seals the cylinder port of the cylinder, and a shaft hole is arranged in the middle of the end cover part for the piston rod to pass through.

12. The bumper of claim 11, wherein, The port edge of the outer cylinder part inserts and seals the gap between the annular protruding part and the cylinder.

13. The bumper of claim 11, wherein, The port edge of the inner cylinder part inserts and seals the gap between the annular protruding part and the piston rod.

14. The bumper of claim 8, wherein, The elastic air bag is a long strip-shaped bag body, and a plurality of bag bodies are uniformly and spacedly arranged in the circumferential direction of the piston rod.

15. The bumper of claim 9, wherein, Further comprising a liquid storage member, the liquid storage member comprises an end plate part and a guide sleeve part; The liquid storage member is arranged in the non-pressure cavity, and the end plate part is arranged close to the piston; the top end of the piston rod is fixedly connected with the piston after passing through the guide hole in the middle of the guide sleeve part; An annular liquid storage cavity is enclosed between the liquid storage member and the cylinder body, and the elastic air bag is arranged in the liquid storage cavity; The end plate part is provided with a through hole for the viscous liquid to enter or exit the liquid storage cavity.

16. The bumper of claim 15, wherein, The outer side of the guide sleeve part is provided with a sunken platform along the edge; the edge of the inner cylinder part is provided with an annular insertion slot on one side of the liquid storage member, the outer side end of the guide sleeve part is inserted into the annular insertion slot, and the inner side wall of the annular insertion slot is inserted into the sunken platform.

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

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