Damper

Abstract

A damper comprises an outer part, an inner part matched with the outer part in a relative rotation mode, a sealing ring arranged between the inner part and the outer part and viscous liquid, and the inner part comprises a cylinder part. The outer part comprises an outer side circumferential wall, an inner side circumferential wall, a bottom wall and an annular space which is formed by the outer side circumferential wall, the inner side circumferential wall and the bottom wall and can be assembled and matched with the cylinder part, and the inner part further comprises an outer buckling part. The cylinder part extends into the annular space, and the outer buckling part extends out of the outer part in the radial direction and is externally buckled to the outer side of the outer side circumferential wall. The damper is good in waterproof performance and stable in structure.

Description

[Technical Field]

[0001] This invention relates to a damper, and more particularly to a rotary damper. [Background Technology]

[0002] Automobiles contain many structures that undergo simple mechanical rotational motion, such as door handles, fuel tank caps, and charging ports. Under the influence of a non-constant drive source, these rotational movements are prone to shocks. To smooth the rotational motion, dampers are often added to reduce or eliminate motion fluctuations. Rotational dampers enable products to achieve smooth mechanical motion during rotation, thereby improving product quality and lifespan.

[0003] Referring to Chinese Patent CN104948636B, a rotational damper is disclosed, which includes an inner component, an outer component that is combined with the inner component in a manner that enables the inner component to rotate relative to it, and a viscous fluid that applies resistance to the relative rotation. The outer component includes an inner cylinder and an outer cylinder, with an annular space between the inner and outer cylinders. The inner component is housed within this annular space, and the outer side of the inner component and the inner side of the outer cylinder are provided with mutually engaging structures. In this design, the path for the external liquid to enter the annular space is short, resulting in poor waterproofing performance. Therefore, an improved damper is needed to overcome the shortcomings of the prior art. [Summary of the Invention]

[0004] The main objective of this invention is to provide an improved damper with good waterproof performance.

[0005] To achieve the above objectives, the present invention can adopt the following technical solution: a damper, comprising an outer component, an inner component that rotates relative to the outer component, a sealing ring disposed between the inner component and the outer component, and a viscous liquid, wherein the inner component comprises a cylindrical portion, and the outer component comprises an outer circumferential wall, an inner circumferential wall, a bottom wall, and an annular space formed by the outer circumferential wall, the inner circumferential wall, and the bottom wall, which can be assembled with the cylindrical portion, wherein the inner component further comprises an outer fastening portion, wherein when the inner component and the outer component are assembled, the cylindrical portion extends into the annular space, and the outer fastening portion extends radially beyond the outer component and fastens to the outer side of the outer circumferential wall.

[0006] Another major objective of this invention is to provide an improved damper that has a stable structure and good waterproof performance.

[0007] To achieve the above objectives, the present invention can adopt the following technical solution: a damper, comprising an outer component, an inner component that rotates relative to the outer component, a sealing ring disposed between the inner component and the outer component, and a viscous liquid, wherein the inner component comprises a cylindrical portion, and the outer component comprises an outer circumferential wall, an inner circumferential wall, a bottom wall, and an annular space formed by the outer circumferential wall, the inner circumferential wall, and the bottom wall that can be assembled with the cylindrical portion, wherein the outer circumferential wall has a mating structure that can mate with the inner component to form an axially fixed mating structure between the inner component and the outer component.

[0008] Another major objective of this invention is to provide an improved method for installing a damper, which has a stable structure and good waterproof performance.

[0009] To achieve the above objectives, the present invention can adopt the following technical solution: the installation method of the above-mentioned damper includes the following steps:

[0010] The outer sealing ring is pre-installed in the circumferential groove;

[0011] The inner sealing ring is pre-installed on the second stepped surface of the outer component;

[0012] The viscous liquid is filled into the annular space of the outer component;

[0013] The inner component and the outer component are pressed together, the cylindrical part of the inner component enters the annular space of the outer component, and the outer buckle of the inner component is fastened to the outer side of the outer circumferential wall of the outer component for fixation.

[0014] Compared with the prior art, the advantages of the present invention are: the damper in the present invention extends the path of external liquid into the damper by fastening the inner component to the outside of the outer component, reduces the risk of the internal viscous liquid being damaged by the interference of the external liquid, and has good waterproof performance and stable structure. [Attached Image Description]

[0015] Figure 1 This is a perspective view of the damper of the present invention.

[0016] Figure 2 yes Figure 1 An exploded view of the damper shown.

[0017] Figure 3 yes Figure 1 The damper shown is a cross-sectional view along the AA direction.

[0018] Figure 4 yes Figure 1 The front view of the damper is shown.

[0019] Figure 5 yes Figure 1The side view of the damper shown.

[0020] [Explanation of Key Component Symbols]

[0021] Damper 100 External Components 10

[0022] Inner circumferential wall 11 Outer circumferential wall 12

[0023] Bottom wall 13 Annular space 14

[0024] Mounting section 15, 23, arc-shaped boss 121

[0025] Concave surface 122, Internal component 20

[0026] Cylindrical part 21 Outer buckle part 22

[0027] Cylinder wall 211 Upper cylinder section 212

[0028] Annular groove 221 Chamfered part 222

[0029] Sealing ring 30, inner sealing ring 31

[0030] External sealing ring 32, viscous liquid 40

Detailed Implementation Methods

[0031] Please see Figures 1 to 5 The image shows a damper 100 according to an embodiment of the present invention. The damper 100 includes an outer component 10, an inner component 20 that rotatably engages with the outer component 10, a sealing ring 30 disposed between the outer component 10 and the inner component 20, and a viscous liquid 40 that can apply resistance to the relative rotation of the outer component 10 and the inner component 20.

[0032] Please see Figure 2 As shown, the outer component 10 is a hollow structure with openings at both ends, comprising an outer circumferential wall 12, an inner circumferential wall 11, and a bottom wall 13. The outer circumferential wall 12, the inner circumferential wall 11, and the bottom wall 13 form an annular space 14 that can be assembled with the inner component. The outer circumferential wall 12 is longer than the inner circumferential wall 11 in the axial direction of the damper. The outer circumferential wall 12 is also provided with a mounting portion 15 for mounting on an external device (not shown). The inner component 20 is a hollow structure with openings at both ends, comprising a cylindrical portion 21, an outer fastening portion 22 extending radially outward from the cylindrical portion 21 and fastening to the outer side of the outer circumferential wall 12, and a mounting portion 23 extending from the cylindrical portion in a direction away from the bottom wall 13. The mounting portion 23 can be mounted on another external device (not shown).

[0033] Please see Figure 3As shown, when the inner component 20 is assembled with the outer component 10, the cylindrical portion 21 and the outer fastening portion 22 are not completely accommodated within the outer component 10. Specifically, the cylindrical portion 21 includes a cylindrical wall 211 extending into the annular space 14 and an upper cylindrical portion 212 that does not enter the annular space 14. The outer fastening portion 22 extends radially outward from the upper cylindrical portion 212 beyond the outer circumferential wall 12 and continues downward to fasten to the outside of the outer circumferential wall 12. The outer circumferential wall 12 has a mating portion 120 at the position corresponding to the outer fastening portion 22. The outer fastening portion 22 is generally hook-shaped and includes an annular groove 221 and a chamfered portion 222 disposed on the lower side of the annular groove 221. The mating part 120 has an arc-shaped boss 121 at the position corresponding to the annular groove 221, which mates with the annular groove 221, and an outer concave surface 122 at the position corresponding to the chamfered part 222, which mates with the chamfered part. The mating of the outer buckle 22 and the mating part 120 extends the path of external liquid into the damper, reducing the risk of performance degradation due to external interference of the internal viscous liquid. A first contact position A is formed at the mating point of the annular groove 221 and the arc-shaped boss 121, and a second contact position B is formed at the mating point of the chamfered part 222 and the outer concave surface 122. Both contact positions A and B are line contacts, which reduces friction during damper rotation and thus reduces the impact of friction on torque. When the outer buckle 22 and the mating part 120 are engaged, the inner and outer components are axially fixed, resulting in rotation relative to the axis. Furthermore, the design of the mating structure at the outer buckle and mating part, such as the engagement of the arc-shaped boss and the annular groove, and the fit of the chamfer and the outer concave surface, reduces the risk of component damage that may occur during the assembly of internal and external components. The wall thickness of the mating part 120 is less than the wall thickness at other locations of the outer circumferential wall 12. When the outer buckle 22 is engaged with the mating part 120, the outer surface of the outer buckle 22 is flush with the outer surface of the outer circumferential wall 12 at other locations.

[0034] The annular space 14 is a gap formed between the outer side of the inner peripheral wall 11 and the inner side of the outer peripheral wall 12, and the wall thickness of the cylinder wall 211 is slightly smaller than the gap. The viscous liquid 40 can fill the annular space 14 and apply resistance to the rotation or relative rotation of the internal component 20. The viscous liquid 40 can be silicone oil or lubricating oil, and there is no limitation on the type of viscous liquid. The sealing ring 30 includes an inner sealing ring 31 disposed on the inner side of the cylinder wall 211 and the outer side of the inner peripheral wall 11, and an outer sealing ring 32 disposed on the outer side of the cylinder wall 211 and the inner side of the outer peripheral wall 12. The inner sealing ring 31 and the outer sealing ring have the same thickness. Both the inner sealing ring 31 and the outer sealing ring 32 are radial dynamic seals, and their installation compression can be designed to be 7%, which can reduce friction caused by external pressure while ensuring sealing performance.

[0035] The cylindrical wall 211 has a circumferential groove 211a near the entrance of the annular space 14 for the outer sealing ring 32 to be embedded. The inner side of the cylindrical wall 211, corresponding to the circumferential groove 211a, has a first stepped surface 211b, and the outer side of the inner circumferential wall 11 has a second stepped surface 211c. The first stepped surface 211b and the second stepped surface 211c together form a space for the inner sealing ring 31 to be embedded. The inner diameter of the inner sealing ring 31 is 2% smaller than the outer diameter of the second stepped surface 211c.

[0036] A method for installing a damper 100 includes the following steps:

[0037] The outer sealing ring 32 is pre-installed in the circumferential groove 211a of the inner component 20;

[0038] The inner sealing ring 31 is pre-installed on the second stepped surface 211c of the outer component 10;

[0039] The viscous liquid is filled into the annular space 14 of the outer component 10 or the viscous liquid is coated on the cylinder wall 211 of the inner component 20.

[0040] The inner component 10 is pressed together with the outer component 20, and the cylindrical wall 211 of the inner component 20 enters the annular space 14 of the outer component 10. The outer buckle 22 of the inner component 20 engages with the mating part 120 to seal and assemble the damper 100.

[0041] The damper in this invention extends the path for external liquid to enter the damper by attaching the outer buckle of the inner component to the outer side of the outer component, thereby reducing the risk of performance degradation of the internal viscous liquid due to interference from the external liquid and ensuring structural stability.

[0042] However, it is understood that although many features and advantages of the invention have been mentioned in the foregoing description, including some structural and functional details, this disclosure is illustrative and many details may be changed, especially in terms of the shape, size and arrangement of components within the scope of the principles as indicated by the broad general meaning of the terms set forth in the appended claims.

Claims

1. A damper comprising an outer component, an inner component that rotates relative to the outer component, a sealing ring disposed between the inner component and the outer component, and a viscous liquid, wherein the inner component comprises a cylindrical portion, and the outer component comprises an outer circumferential wall, an inner circumferential wall, a bottom wall, and an annular space formed by the outer circumferential wall, the inner circumferential wall, and the bottom wall, capable of being assembled with the cylindrical portion, characterized in that: The inner component also includes an outer fastening portion. When the inner component is assembled with the outer component, the cylindrical portion extends into the annular space, and the outer fastening portion extends radially beyond the outer component and fastens to the outer side of the outer circumferential wall.

2. The damper as described in claim 1, characterized in that: When the outer buckle is fastened to the outer side of the outer circumferential wall, the outer buckle and the outer side of the outer circumferential wall form a first contact position and a second contact position.

3. The damper as described in claim 2, characterized in that: At the first contact position, the outer component and the inner component make a first line contact; at the second contact position, the outer component and the inner component make a second line contact.

4. The damper as described in claim 3, characterized in that: The outer buckle includes an annular groove, and the outer circumferential wall is provided with an arc-shaped boss that mates with the annular groove.

5. The damper as described in claim 3, characterized in that: The outer buckle includes a chamfered portion disposed on the lower side of the annular groove, and an outer concave surface that mates with the chamfered portion is provided at a corresponding position on the outer circumferential wall.

6. The damper as described in claim 5, characterized in that: The sealing ring includes an inner sealing ring disposed on the inner side of the cylindrical portion and an outer sealing ring disposed on the outer side of the cylindrical portion, wherein the inner sealing ring and the outer sealing ring are of equal thickness.

7. The damper as described in claim 6, characterized in that: The outer side of the cylindrical part is provided with a circumferential groove for the outer sealing ring to be inserted. The inner side of the cylindrical part is provided with a first stepped surface for the inner sealing ring to be inserted at the circumferential groove. The inner circumferential wall of the outer component is recessed with a second stepped surface, so that the inner sealing ring can be inserted between the first stepped surface and the second stepped surface.

8. The damper as described in claim 7, characterized in that: The inner diameter of the inner sealing ring is 2% smaller than the outer diameter of the second stepped surface.

9. A method for installing the damper as described in claim 7, characterized in that: Includes the following steps: The outer sealing ring is pre-installed in the circumferential groove; The inner sealing ring is pre-installed on the second stepped surface of the outer component; The viscous liquid is filled into the annular space of the outer component; The inner component and the outer component are pressed together, the cylindrical part of the inner component enters the annular space of the outer component, and the outer buckle of the inner component is fastened to the outer side of the outer circumferential wall of the outer component for fixation.

10. A damper comprising an outer component, an inner component that rotates relative to the outer component, a sealing ring disposed between the inner component and the outer component, and a viscous liquid, wherein the inner component comprises a cylindrical portion, and the outer component comprises an outer circumferential wall, an inner circumferential wall, a bottom wall, and an annular space formed by the outer circumferential wall, the inner circumferential wall, and the bottom wall, capable of being assembled with the cylindrical portion, characterized in that: The outer circumferential wall is provided with a mating structure that can cooperate with the inner component to form an axially fixed mating structure between the inner and outer components.

Images