Guides and shock absorbers having the same

Abstract

A guide for a shock absorber to cooperate with an oil seal of the shock absorber, comprising: a central hole for a connecting rod of the shock absorber to pass through; a first base located at the periphery of the central hole; a guide retainer ring protruding upwardly from the first base, the guide retainer ring being provided with a guide retainer ring groove; a second base located at the periphery of the first base, the second base being provided with a recessed groove; and a guide window communicating with the recessed groove and penetrating through the guide. The guide retainer ring is provided with an outer taper surface to cooperate with the oil seal. The sealing system formed by the guide retainer ring and the oil seal can resist higher reverse pressure, and the oil flow is improved and the response speed is improved. The utility model also discloses a shock absorber with the guide.

Description

Technical Field

[0001] This utility model relates to a guide and a vibration damper having the guide, belonging to the field of vehicle vibration reduction technology. Background Technology

[0002] Vehicle shock absorbers in related technologies typically include a connecting rod, a guide, and an oil seal. The guide cooperates with the oil seal to seal the oil seal check valve. The force requirement is generally low, so the mating surface of the check valve can be a flat surface or a circumferential retaining ring.

[0003] However, as the requirements for force and solenoid valve response frequency of shock absorbers become increasingly stringent, the sealing system needs to withstand higher reverse pressure. Therefore, the matching structure of the guide and oil seal check valve in related technologies needs further optimization. Utility Model Content

[0004] The purpose of this invention is to provide a guide with an improved structure and a vibration damper having the guide.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a guide for use in a shock absorber to cooperate with the oil seal of the shock absorber, the guide comprising: A center hole, through which the connecting rod of the shock absorber passes; A first base, located on the outer periphery of the central hole; A guide retaining ring, the guide retaining ring protruding upward from the first base, and the guide retaining ring having a guide retaining ring groove; A second base, located on the outer periphery of the first base, is provided with a recessed groove; and A guide window, which is connected to and passes through the recessed groove; The guide retaining ring is provided with an outer conical surface for cooperating with the oil seal.

[0006] As a further improvement of this utility model, the number of guide skylights is the same as the number of guide retaining ring grooves.

[0007] As a further improvement of this utility model, the number of guide skylights and the number of guide retaining ring grooves are both multiple, wherein the sum of the flow areas of the multiple guide skylights is equal to the sum of the flow areas of the multiple guide retaining ring grooves.

[0008] As a further improvement of the present invention, the number of recessed grooves and the number of guide retaining ring grooves are both multiple, wherein the multiple recessed grooves are evenly distributed along the circumference of the second base, and the multiple guide retaining ring grooves are evenly distributed along the circumference of the guide retaining ring.

[0009] As a further improvement of this utility model, the guide retaining ring groove and the recessed groove are arranged in a radially offset manner along the guide.

[0010] As a further improvement of the present invention, along the circumference of the guide, each recessed groove is located between two adjacent guide retaining ring grooves that are close to it, and each guide retaining ring groove is located between two adjacent recessed grooves that are close to it.

[0011] This utility model also discloses a vibration damper, which includes: Inner cylinder, wherein the inner cylinder is provided with an inner cavity; An outer cylinder, with an outer cavity formed between the outer cylinder and the inner cylinder; A connecting rod, which is at least partially disposed in the inner cylinder and is capable of axial extension and retraction; The guide, wherein the guide is as described above, and the guide retaining ring is provided with an outer conical surface; and An oil seal that mates with the guide and the connecting rod. The oil seal includes a main lip that abuts against the connecting rod, a base located on the outer periphery of the main lip, an abutting portion extending from the base, and a corner portion located at the connection point between the abutting portion and the base. The abutting portion has an inner conical surface that mates with the outer conical surface of the guide retaining ring. The height of the outer conical surface protruding upward from the first base of the guide is close to the height of the corner portion.

[0012] As a further improvement of this utility model, the height of the outer conical surface protruding upward from the first base does not exceed the height of the corner portion.

[0013] As a further improvement of this utility model, the base is inclined from top to bottom toward the connecting rod, and the abutting part is inclined from top to bottom toward the direction away from the connecting rod.

[0014] As a further improvement of the present invention, when the shock absorber is compressed, the connecting rod moves and the inner conical surface of the oil seal abuts against the outer conical surface of the guide retaining ring groove to play a sealing role and prevent the oil connected to the outer chamber from returning to the inner chamber. When the shock absorber returns to its original position, the connecting rod moves, and the oil in the inner chamber pushes the abutment part outward, so that the oil connected to the inner chamber flows into the outer chamber.

[0015] Compared to existing technologies, the guide and damper with the guide of this utility model include a guide retaining ring, which protrudes upward from the first base. The guide retaining ring has an outer conical surface for cooperating with the oil seal, thereby enabling the sealing system formed by the guide retaining ring and the oil seal to resist higher reverse pressure. In addition, the guide retaining ring has a guide retaining ring groove, which helps to improve oil flow and increase response speed. Attached Figure Description

[0016] Figure 1 This is a partial cross-sectional schematic diagram of the shock absorber of this utility model; Figure 2 yes Figure 1 A magnified view of part A circled in the middle; Figure 3 yes Figure 1 A three-dimensional schematic diagram of the guide in the middle; Figure 4 yes Figure 3 A magnified view of part B circled in the middle; Figure 5 yes Figure 3 A magnified view of the circled area C; Figure 6 yes Figure 5 Top view; Figure 7 It is along Figure 6 A cross-sectional schematic diagram of the DD line. Detailed Implementation

[0017] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Where several specific embodiments exist, features in these embodiments can be combined with each other without conflict. When the description relates to the drawings, unless otherwise stated, the same numbers or symbols in different drawings represent the same or similar elements. The content described in the following exemplary embodiments does not represent all embodiments of this utility model; rather, they are merely examples of products consistent with this utility model and as described in the claims.

[0018] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the scope of protection of this invention. It should be understood that terms such as "first," "second," and similar words used in the specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish the features.

[0019] Please refer to Figures 1 to 7 As shown, this utility model discloses a shock absorber 100 for installation on a vehicle. The shock absorber 100 includes: an inner cylinder 1, an outer cylinder 2, a connecting rod 3 at least partially disposed in the inner cylinder 1 and capable of axial extension and retraction, a guide 4 disposed between the inner cylinder 1 and the outer cylinder 2, an oil seal 5 cooperating with the guide 4 and the connecting rod 3, and a top cover 6 fixed to the outer cylinder 2. The inner cylinder 1 has an axially extending inner chamber 10. The shock absorber 100 also includes an outer chamber 20 located between the inner cylinder 1 and the outer cylinder 2, the outer chamber 20 being annular.

[0020] The guide 4 includes a central hole 41 through which the connecting rod 3 passes, a first base 42 located on the outer periphery of the central hole 41, a guide retaining ring 43 protruding upward from the first base 42, a second base 44 located on the outer periphery of the first base 42, a plurality of recessed grooves 45 formed by recesses from the second base 44, and a guide window 46 communicating with each recessed groove 45 and radially penetrating the guide 4. In the embodiment illustrated in this utility model, the plurality of recessed grooves 45 are evenly arranged along the circumference of the second base 44 to adjust the uniformity of oil distribution.

[0021] In the embodiment illustrated in this utility model, the oil seal 5 is at least partially installed in the guide 4. The oil seal 5 includes an oil seal main lip 51 that abuts against the connecting rod 3, a base 52 located on the outer periphery of the oil seal main lip 51, and an abutment portion 53 extending from the base 52. The base 52 is inclined from top to bottom towards the connecting rod 3. The abutment portion 53 is inclined from top to bottom away from the connecting rod 3. With this configuration, the oil seal 5 has a corner portion 54 located at the connection position between the abutment portion 53 and the base 52. The abutment portion 53 is equivalent to the oil seal check valve of the oil seal 5. In the embodiment illustrated in this utility model, the abutment portion 53 is frustum-shaped, and the abutment portion 53 has an end portion 531 for abutting against the first base 42 and an inner conical surface 532 that opens outward in a top-to-bottom direction.

[0022] In the embodiment illustrated in this utility model, the connecting rod 3, the oil seal 5, and the guide 4 are assembled by press fitting.

[0023] The guide ring 43 protrudes upward from the first base 42 to a certain height. The guide ring 43 has a plurality of guide ring grooves 431 arranged circumferentially thereon, the grooves 431 being recessed downward from the guide ring 43. Preferably, the plurality of guide ring grooves 431 are evenly arranged circumferentially along the guide ring 43 to adjust the uniformity of oil distribution.

[0024] The guide retaining ring 43 is provided with an outer conical surface 432 for engaging with the abutment portion 53. Please refer to... Figure 2 As shown by the dotted line, the height of the outer conical surface 432 protruding upward from the first base 42 is close to the height of the corner portion 54. This configuration prevents the abutting portion 53 from exceeding the guide retaining ring groove 431 due to high pressure, reducing the risk of failure and improving reliability. In the embodiment illustrated in this utility model, the height of the outer conical surface 432 protruding upward from the first base 42 does not exceed the height of the corner portion 54; that is, the height of the outer conical surface 432 protruding upward from the first base 42 is slightly less than the height of the corner portion 54, or the height of the outer conical surface 432 protruding upward from the first base 42 is flush with the height of the corner portion 54.

[0025] Please combine Figure 3 as well as Figure 6 As shown in the illustrated embodiment of this utility model, the guide retaining ring groove 431 and the recessed groove 45 are arranged in a radially offset manner along the guide 4. In other words, the guide retaining ring groove 431 and the recessed groove 45 are not aligned radially along the guide 4. This arrangement is beneficial for regulating the oil flow. Preferably, taking the recessed groove 45 located on the outer side of the guide retaining ring groove 431 as an example, along the circumference of the guide 4, each recessed groove 45 is located between two adjacent guide retaining ring grooves 431. Similarly, taking the guide retaining ring groove 431 located on the inner side of the recessed groove 45 as an example, along the circumference of the guide 4, each guide retaining ring groove 431 is located between two adjacent recessed grooves 45. This arrangement is beneficial for regulating the flow of the oil.

[0026] In the embodiment illustrated in this utility model, the inner conical surface 532 is used to abut against the outer conical surface 432 to achieve a seal.

[0027] When the shock absorber 100 is compressed, the connecting rod 3 moves, and the inner conical surface 532 of the oil seal 5 abuts against the outer conical surface 432 of the guide retaining ring groove 431 to play a sealing role and prevent the oil connected to the outer chamber 20 from returning to the inner chamber 10.

[0028] When the shock absorber 100 returns to its original position, the connecting rod 3 moves, and the oil in the inner chamber 10 pushes the abutment part 53 outward. A gap is formed between the inner conical surface 532 of the oil seal 5 and the outer conical surface 432 of the guide retaining ring groove 431, so that the oil connected to the inner chamber 10 flows from the gap, the guide retaining ring groove 431 and the guide skylight 46 into the outer chamber 20.

[0029] Preferably, in one embodiment of the present invention, the sum of the flow areas of the plurality of guide skylights 46 is equal to the sum of the flow areas of the plurality of guide retaining ring grooves 431. In the embodiment illustrated in the present invention, the number of guide skylights 46 is the same as the number of guide retaining ring grooves 431.

[0030] Preferably, in the embodiment illustrated in this utility model, the number of guide retaining ring grooves 431 is three or more.

[0031] Compared to existing technologies, the outer conical surface 432 of this invention protrudes upwards from the first base 42 at a height close to the height of the corner portion 54, preventing the abutment portion 53 from being crushed, reducing the risk of failure, and improving reliability. Furthermore, by providing the guide retaining ring groove 431, it is beneficial to adjust the force value and response frequency, thereby improving performance.

[0032] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A guide for use in a shock absorber to cooperate with the oil seal of the shock absorber, characterized in that: The guide includes: A center hole, through which the connecting rod of the shock absorber passes; A first base, located on the outer periphery of the central hole; A guide retaining ring, the guide retaining ring protruding upward from the first base, and the guide retaining ring having a guide retaining ring groove; A second base, located on the outer periphery of the first base, is provided with a recessed groove; and A guide window, which is connected to and passes through the recessed groove; The guide retaining ring is provided with an outer conical surface for cooperating with the oil seal.

2. The guide as described in claim 1, characterized in that: The number of guide skylights is the same as the number of guide retaining ring grooves.

3. The guide as described in claim 2, characterized in that: The number of guide skylights and the number of guide retaining ring grooves are both multiple, wherein the sum of the flow areas of the multiple guide skylights is equal to the sum of the flow areas of the multiple guide retaining ring grooves.

4. The guide as described in claim 2, characterized in that: The number of recessed grooves and the number of guide retaining ring grooves are both multiple, wherein the multiple recessed grooves are evenly distributed along the circumference of the second base, and the multiple guide retaining ring grooves are evenly distributed along the circumference of the guide retaining ring.

5. The guide as described in claim 4, characterized in that: The guide retaining ring groove and the recessed groove are arranged radially offset from each other along the guide.

6. The guide as described in claim 5, characterized in that: Along the circumference of the guide, each recessed groove is located between two adjacent guide retaining ring grooves, and each guide retaining ring groove is located between two adjacent recessed grooves.

7. A vibration damper, characterized in that, include: Inner cylinder, wherein the inner cylinder is provided with an inner cavity; An outer cylinder, with an outer cavity formed between the outer cylinder and the inner cylinder; A connecting rod, which is at least partially disposed in the inner cylinder and is capable of axial extension and retraction; The guide, wherein the guide is as described in any one of claims 1 to 6, and the guide retaining ring is provided with an outer conical surface; and An oil seal that mates with the guide and the connecting rod. The oil seal includes a main lip that abuts against the connecting rod, a base located on the outer periphery of the main lip, an abutting portion extending from the base, and a corner portion located at the connection point between the abutting portion and the base. The abutting portion has an inner conical surface that mates with the outer conical surface of the guide retaining ring. The height of the outer conical surface protruding upward from the first base of the guide is close to the height of the corner portion.

8. The vibration damper as described in claim 7, characterized in that: The height by which the outer conical surface protrudes upward from the first base does not exceed the height of the corner portion.

9. The vibration damper as described in claim 7, characterized in that: The base is inclined from top to bottom toward the connecting rod, and the abutment portion is inclined from top to bottom toward the distance from the connecting rod.

10. The vibration damper as described in claim 7, characterized in that: When the shock absorber is compressed, the connecting rod moves, and the inner conical surface of the oil seal abuts against the outer conical surface of the guide retaining ring groove to provide a sealing effect and prevent the oil connected to the outer chamber from returning to the inner chamber. When the shock absorber returns to its original position, the connecting rod moves, and the oil in the inner chamber pushes the abutment part outward, so that the oil connected to the inner chamber flows into the outer chamber.

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