CN107165967B

CN107165967B - buffer device

Info

Publication number: CN107165967B
Application number: CN201610129664.7A
Authority: CN
Inventors: 梁秀江; 陈庚金; 王俊强
Original assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Current assignee: King Slide Works Co Ltd; King Slide Technology Co Ltd
Priority date: 2016-03-08
Filing date: 2016-03-08
Publication date: 2021-04-23
Anticipated expiration: 2036-03-08
Also published as: CN107165967A

Abstract

The present invention relates to a buffer device, comprising a cylinder, a cover assembly, a piston rod and an elastic member. The cylinder comprises an inner wall defining a chamber and an opening communicating with the chamber, wherein the chamber is filled with a buffer fluid; the cover assembly is disposed adjacent to the opening of the cylinder; the piston rod can move relative to the cylinder, the piston rod comprises a rod portion, an extension portion, and an expansion portion located between the rod portion and the extension portion, the rod portion passes through the cover assembly, and the width of the expansion portion is greater than the width of the rod portion; the elastic member is disposed in the chamber of the cylinder, and the elastic member is used to provide elastic force to the piston rod.

Description

Buffer device

Technical Field

The present invention relates to a damping device, and more particularly, to a damping device applied to a furniture object.

Background

Generally, certain furniture items, such as doors or cabinets, are provided with cushioning devices. The buffer device can be used for providing a buffer function when a first member moves relative to a second member from an opening end to a closing end so as to relieve the force when the first member closes relative to the second member. For example, U.S. Pat. No. US9,021,656B2 discloses a damping device for furniture, which comprises a slide (13), a piston (22) and a piston rod (17). As can be seen from fig. 4a and 4b of the present disclosure, one end of the piston rod (17) is connected to the piston (22), and the piston (22) is located in a chamber (21) of the sliding seat (13).

Specifically, in the related art of the present damping device, the piston rod is generally a slender rod, and the piston rod needs to be additionally provided with a piston. That is, the piston rod and the piston of the prior art are two separate components. When the piston rod and the piston are made of different materials, for example, the piston rod is made of metal and the piston is made of plastic, the piston may be damaged due to the strong pressure applied to the piston for a long time. Therefore, if a different cushioning device can be developed, it will bring more choices to the market.

Disclosure of Invention

The invention aims to provide a buffer device, which realizes that a piston rod is combined with a piston to be a single component and can achieve the buffer function of a reinforced structure.

According to an aspect of the present invention, a damping device includes a cylinder, a cover member, a piston rod, and an elastic member, and is characterized in that: the cylinder body comprises a cavity defined by an inner wall and an opening communicated with the cavity, and a buffer fluid is filled in the cavity; the covering component is arranged adjacent to the opening of the cylinder body; the piston rod can move relative to the cylinder body and comprises a rod part, an extension part and an expansion part, wherein the rod part is positioned between the rod part and the extension part, the rod part penetrates through the covering assembly, and the width of the expansion part is greater than that of the rod part; the elastic member is disposed in the cavity of the cylinder body and is used for providing elastic force to the piston rod.

Preferably, the inner wall of the cylinder has a groove for passing at least a portion of the buffer fluid.

Preferably, a gap is formed between the expanding portion and the inner wall of the cylinder for passing at least a portion of the buffer fluid.

Preferably, the damping device further comprises a base mounted to the piston rod adjacent to the extension portion, the base being disposed in the cavity of the cylinder and abutting against the elastic member.

Preferably, the piston rod further comprises a mounting portion protruding from the extension portion, the base being mounted to the mounting portion.

Preferably, the base has at least one hole for passing at least a portion of the buffer fluid.

Preferably, the damping device further comprises a control valve movably mounted between the expansion portion of the piston rod and the base.

Preferably, the rod portion, the extension portion and the expansion portion of the piston rod are integrally formed.

Preferably, the width of the extension part is larger than that of the rod part, and the width of the extension part is smaller than that of the expansion part.

Preferably, the piston rod is made of a metallic material.

Preferably, the cover assembly includes a cover body having a space for accommodating the sleeve, a sleeve through which the rod portion of the piston rod passes, and a sealing ring fitted over the cover body.

According to another aspect of the present invention, a damping device comprises a cylinder, a cover member, a piston rod, a base, a control valve and an elastic member, wherein: the cylinder body comprises a cavity defined by an inner wall and an opening communicated with the cavity, and a buffer fluid is filled in the cavity; the covering component is arranged adjacent to the opening of the cylinder body; the piston rod can move relative to the cylinder body, the piston rod comprises a rod part, an extension part and an expansion part, the rod part, the extension part and the expansion part are positioned between the rod part and the extension part and are integrally formed, wherein the rod part extends out of the opening, the width of the expansion part is larger than that of the rod part, and a gap is formed between the expansion part and the inner wall of the cylinder body for at least one part of the buffer fluid to pass through; the base is mounted to the piston rod adjacent the extension and is located within the chamber of the cylinder; the control valve is movably mounted between the expansion part of the piston rod and the base; the elastic piece is arranged in the cavity of the cylinder body and is used for providing elastic force to the piston rod; when the piston rod receives force in a first direction, the elastic piece accumulates elastic force, and the control valve is positioned at a position corresponding to the expansion part of the piston rod to block the gap; when the force in the first direction is released, the piston rod can respond to the elastic force of the elastic piece to displace in a second direction, so that the control valve is far away from the position and does not block the gap.

Drawings

For further explanation of the above objects, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings, in which:

fig. 1 is an exploded view of a buffering device according to an embodiment of the present invention.

Fig. 2 is a perspective view illustrating a cylinder of a damping device according to an embodiment of the present invention.

Fig. 3 is an assembly view of a buffer device according to an embodiment of the invention.

Fig. 4 is a schematic diagram illustrating a piston rod of a damping device according to an embodiment of the invention receiving a force in a first direction.

FIG. 5 shows an enlarged view of area A of FIG. 4 to show that the control valve is capable of blocking a gap in a position.

FIG. 6 is a schematic diagram illustrating the force being applied to the piston rod of the damping device in the first direction according to an embodiment of the present invention.

Fig. 7 is a schematic view illustrating a piston rod of a damping device according to an embodiment of the invention being displaced in a second direction in response to an elastic force of an elastic member.

Fig. 8 is a schematic view illustrating that the piston rod of the damping device according to the embodiment of the present invention can return to an initial state with respect to the cylinder in response to the elastic force of the elastic member.

Detailed Description

Fig. 1 shows a damping device 20 according to an embodiment of the present invention, which includes a cylinder 22, a cover assembly 24, a piston rod 26 and an elastic member 28. Preferably, the damping device 20 further includes a base 30 and a control valve 32.

As shown in FIG. 2, the cylinder 22 includes an inner wall 34 defining a chamber 36 and an opening 38 communicating with the chamber 36. In this embodiment, the cylinder 22 is substantially cylindrical in shape, and the cylinder 22 has an annular inner wall 34. Preferably, the inner wall 34 of the cylinder 22 has a groove 40. The groove 40 is disposed along the longitudinal direction of the cylinder 22.

As shown in fig. 3, the base 30 and the piston rod 26 are in an initial state relative to the cylinder 22, and the chamber 36 of the cylinder 22 can be filled with a buffer fluid 42 (in fig. 3, the buffer fluid 42 is represented by a plurality of black dots).

The cover assembly 24 is disposed adjacent the opening 38 of the cylinder 22. Preferably, the cover assembly 24 includes a cover 44, a sleeve 46, and a sealing ring 48. The cover 44 has a space 50 for accommodating the sleeve 46; the sealing ring 48 is disposed around the cover 44 to seal the opening 38 of the cylinder 22.

The piston rod 26 is movable relative to the cylinder 22, and the piston rod 26 includes a rod portion 52, an extension portion 54, and an expansion portion 56 located between the rod portion 52 and the extension portion 54. Preferably, the piston rod 26 also includes a mounting portion 58 projecting from the extension 54. Here, the piston rod 26 may be made of a metal material. In addition, the rod portion 52, the extending portion 54, the expanding portion 56 and the mounting portion 58 of the piston rod 26 are integrally formed, so that the piston rod 26 provided by the embodiment of the invention has better structural strength; wherein the expanding portion 56 may be considered a piston. The width W1 of the flared portion 56 is greater than the width W2 of the stem portion 52; the width W3 of the extension 54 is greater than the width W2 of the stem 52, and the width W3 of the extension 54 is less than the width W1 of the flared portion 56. In short, the expression is W1> W3> W2. In addition, the stem 52 extends through the cover assembly 24, such as through the sleeve 46 and the cover 44, and may extend outside of the opening 38 of the cylinder 22. A gap 60 is provided between the enlarged portion 56 of the piston rod 26 and the inner wall 34 of the cylinder 22.

The resilient member 28 is disposed within the chamber 36 of the cylinder 22, and the resilient member 28 is configured to provide a resilient force to the piston rod 26 such that a portion of the rod portion 52 of the piston rod 26 remains extended outside the opening 38 of the cylinder 22.

The base 30 is mounted to the mounting portion 58 of the piston rod 26 adjacent the extension 54. The base 30 is disposed in the chamber 36 of the cylinder 22 and abuts against the resilient member 28. Preferably, the base 30 has at least one hole 62.

The control valve 32 is movably mounted between the flared portion 56 of the piston rod 26 and the base 30. Specifically, the flared portion 56 of the piston rod 26 is spaced apart from the base 30 by a distance L1, and the control valve 32 has a dimension L2 that is less than the distance L1 such that the control valve 32 is movable between the flared portion 56 of the piston rod 26 and the base 30. The control valve 32 is generally ring-shaped and made of flexible material, and the control valve 32 has an annular opening 64 for the extension portion 54 of the piston rod 26 to pass through. For example, the aperture of the annular opening 64 is larger than the size of the extension 54 of the piston rod 26 for the extension 54 to pass through.

As shown in fig. 3 and 4, when a force is applied to the piston rod 26 in a first direction D1, the piston rod 26 is displaced in the first direction D1, so that the base 30 pushes against the elastic element 28, the elastic element 28 can accumulate an elastic force, and a portion of the buffer fluid 42 is squeezed to flow toward the opening 38.

Specifically, when a portion of the buffer fluid 42 flows in a direction toward the opening 38, a portion of the buffer fluid 42 may pass through the at least one hole 62 of the base 30, the annular opening 64 of the control valve 32, the groove 40, or the gap 60. Wherein, by means of the groove 40 or the gap 60, a portion of the buffer fluid 42 can flow from one side of the expansion portion 56 of the piston rod 26 to the other side of the expansion portion 56 of the piston rod 26. In this embodiment, during the displacement of the piston rod 26 in the first direction D1, the control valve 32 can be in a position P relative to the expanding portion 56 of the piston rod 26 to block the gap 60 (this portion can be matched with fig. 5). Therefore, in this state, a portion of the damping fluid 42 is forced to flow from the groove 40 to the other side of the expanding portion 56 of the piston rod 26.

As shown in fig. 4 and 6, when the force is continuously applied to the piston rod 26 in the first direction D1, the base 30 further pushes against the elastic member 28, so that the elastic member 28 accumulates the elastic force, and a portion of the buffer fluid 42 is squeezed to continuously flow from the groove 40 to the other side of the expanding portion 56 of the piston rod 26.

As shown in fig. 7 and 8, when the force in the first direction D1 is released, the base 30 and the piston rod 26 can be displaced in a second direction D2 in response to the elastic force of the elastic element 28, wherein the second direction D2 is opposite to the first direction D1. During the displacement of the base 30 and the piston rod 26 in the second direction D2, a portion of the buffer fluid 42 is compressed, such that a portion of the buffer fluid 42 flows back from the other side of the expanding portion 56 of the piston rod 26 in a direction away from the opening 38. During this backflow, a portion of the buffer fluid 42 may pass through the gap 60; alternatively, a portion of the buffer fluid 42 may pass through the channel 40. Wherein, the control valve 32 can be close to the base 30 by displacing the base 30 in the second direction D2 in response to the elastic force of the elastic member 28. Briefly, the control valve 32 moves away from the position P without blocking the gap 60; alternatively, by returning a portion of the buffer fluid 42, the control valve 32 can be moved from the position P to the base 30 by the portion of the buffer fluid 42 and displaced toward the base 30, i.e., the control valve 32 can be moved away from the position P accordingly.

It can be seen that the piston rod 26 of the shock absorber 22 provided in the embodiment of the present invention is an integrally formed single component, wherein the width of the expanding portion 56 of the piston rod 26 is larger than that of the rod portion 52; furthermore, the cylinder 22 is provided with the channel 40 for the passage of a damping fluid 42.

From the above description, it can be seen that the enhanced efficacy and advantages of the present invention are: so as to realize that the piston rod is combined with the piston to be a single component and achieve the buffer function of the reinforced structure.

Although the present invention has been described with reference to the present specific embodiments, it will be recognized by those skilled in the art that the above embodiments are illustrative only, and various equivalent changes and modifications may be made without departing from the spirit of the present invention, and therefore, it is intended to cover in the appended claims all such changes and modifications as fall within the true spirit of the invention.

Claims

1. A buffer device, comprising a cylinder, a covering component, a piston rod and an elastic member, wherein the cylinder comprises an inner wall defining a chamber, and an opening communicating with the chamber, and the chamber is filled with There is a buffer fluid; the covering component is disposed adjacent to the opening of the cylinder; the piston rod can move relative to the cylinder; the elastic piece is arranged in the cavity of the cylinder, and the elastic piece is used to provide elastic force to The piston rod is characterized by:

The piston rod includes a rod part, an extension part, and an expansion part, and the expansion part is located between the rod part and the extension part, wherein the rod part passes through the covering component, and the width of the expansion part is larger than the width of the expansion part. The width of the rod portion, the width of the extension portion is greater than the width of the rod portion, and the width of the extension portion is smaller than the width of the expansion portion, wherein the piston rod further includes a mounting portion protruding from the extension portion;

The inner wall of the cylinder has a groove for at least a part of the buffer fluid to pass through, and the groove is arranged along the length direction of the cylinder;

There is a gap between the expansion part and the inner wall of the cylinder, for at least a part of the buffer fluid to pass through;

The buffer device also includes a base mounted on the mounting portion of the piston rod and adjacent to the extension portion, the base is arranged in the cavity of the cylinder, the base is against the elastic member, the base having at least one hole for passing at least a portion of the buffer fluid;

The buffer device also includes a control valve installed between the expansion part of the piston rod and the base, the control valve is made of flexible material, and the control valve has an annular opening for the extension part of the piston rod pass through;

Wherein, the rod part, extension part, expansion part and mounting part of the piston rod are integrally formed; wherein, a part of the buffer fluid can pass through at least one hole of the base, the annular opening of the control valve, the groove or the gap;

When the piston rod receives a force in a first direction, the elastic member accumulates an elastic force, and the control valve is in a position relative to the expansion portion of the piston rod to block the gap, so that a part of the buffer fluid will be forced from the groove flows from one side of the expansion portion of the piston rod to the other side of the expansion portion of the piston rod;

Wherein, when the force in the first direction is released, the piston rod can be displaced in a second direction in response to the elastic force of the elastic member, so that the control valve is away from the position without blocking the gap, so that a part of the buffer fluid is Backflow is possible through this gap.

2 . The buffer device according to claim 1 , further comprising the control valve movably installed between the expansion portion of the piston rod and the base. 3 .

3. The buffer device according to claim 1, wherein the piston rod is made of a metal material.

4 . The buffer device according to claim 1 , wherein the covering component comprises a cover body, a sleeve and a sealing ring, the cover has a space for accommodating the sleeve, and the rod portion of the piston rod passes through the sleeve. 5 . Through the set, the sealing ring is sleeved on the cover body.