CN117759669A - Guide assembly and damper - Google Patents

Abstract

A deflector assembly and a shock absorber. The guide assembly includes a guide and a guide bushing. The guide includes a through hole penetrating in an axial direction thereof, and has a first end portion and a second end portion opposite to each other in the axial direction. The through hole includes a first hole and a second hole communicating with each other. The diameter of the first hole is smaller than that of the second hole, the second hole is positioned at the first end of the guide, and the first hole is positioned at one side of the second hole close to the second end. The side wall of the second hole is provided with a first groove, and the guide bushing is positioned in the second hole and is attached to the side wall outside the first groove of the second hole, so that the first groove forms a channel for communicating the outside of the guide with the inner space of the guide. Therefore, gas or bubbles in the external oil liquid can enter the inner space of the guide device through the first groove, and can be discharged through the guide device, so that noise and vibration caused by the gas or bubbles in the oil liquid can be eliminated.

Description

Guide assembly and damper

Technical Field

Embodiments of the present disclosure relate to a guide assembly and a shock absorber.

Background

In order to improve the vibration generated by rebound, a shock absorber connected with the elastic element in parallel can be arranged in the automobile suspension system to attenuate the vibration, and the working principle of the shock absorber is that when the relative motion occurs due to the vibration between a frame (or a vehicle body) and an axle, a piston rod in the shock absorber moves up and down, and oil in a storage cylinder of the shock absorber flows into another cavity from one cavity through different valves repeatedly. At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form damping force to vibration, so that the vibration energy of the automobile is converted into the heat energy of the oil, and then absorbed by the shock absorber and emitted into the atmosphere.

The shock absorber can be divided into a single-cylinder shock absorber and a double-cylinder shock absorber according to the structure, and further can be divided into a single-cylinder air pressure shock absorber, a double-cylinder oil pressure shock absorber and a double-cylinder oil gas shock absorber.

Disclosure of Invention

The unavoidable gas or bubbles can exist in the oil liquid in the oil storage cylinder of the shock absorber, the piston rod of the shock absorber moves up and down in the working process, and the pressure change of the oil liquid can cause the bubble in the oil liquid to be broken, so that local hydraulic impact is caused, noise and vibration are caused, and the stability of the performance of the shock absorber is affected.

Embodiments of the present disclosure provide a guide assembly and a shock absorber.

At least one embodiment of the present disclosure provides a guide assembly including a guide including a through hole penetrating in an axial direction thereof and having first and second ends opposite to each other in the axial direction; the through hole comprises a first hole and a second hole which are communicated with each other, the diameter of the first hole is smaller than that of the second hole, the second hole is positioned at the first end part of the guide, the first hole is positioned at one side, close to the second end part, of the second hole, a first groove is formed in the side wall of the second hole, and the guide bushing is positioned in the second hole and is attached to the side wall, outside the first groove, of the second hole, so that the first groove forms a channel for communicating the outer part of the guide with the inner space of the guide.

For example, in a guide assembly provided in an embodiment of the present disclosure, the first groove extends in a direction parallel to the axial direction.

For example, in the guide assembly provided in an embodiment of the present disclosure, in a direction parallel to the axial direction, the first groove has the same size as the second hole, and an end of the guide bush near the second end is flush with an end of the second hole near the second end, or is farther from the second end than an end of the second hole near the second end.

For example, in the guide assembly provided in an embodiment of the present disclosure, a plurality of the first grooves are spaced apart on the sidewall of the second hole.

For example, in an embodiment of the present disclosure, the guide assembly further includes an oil retainer, the through hole further includes a third hole, the third hole is located between the first hole and the second hole, a diameter of the third hole is greater than a diameter of the first hole and less than a diameter of the second hole, and the oil retainer is disposed in the second hole.

For example, in the guide assembly provided in an embodiment of the present disclosure, the guide is formed with a mesa between the first hole and the third hole, the mesa having an inner circumference intersecting with a sidewall of the first hole and an outer circumference intersecting with a sidewall of the third hole, the mesa being provided with a second groove, both ends in an extending direction of the second groove being located on the inner circumference and the outer circumference, respectively.

For example, in a guide assembly provided in an embodiment of the present disclosure, the second groove extends in a radial direction of the inner circumference or the outer circumference.

For example, in a guide assembly provided in an embodiment of the present disclosure, a plurality of the second grooves are spaced apart on the table.

For example, in one embodiment of the disclosure, the guide assembly further includes a spacer sleeve disposed over an outer side of the guide, the spacer sleeve including a spacer sleeve body portion at the first end and a spacer sleeve extension extending toward a side away from the first end.

For example, in the guide assembly provided in an embodiment of the present disclosure, the through hole further includes a fourth hole located at a side of the first hole away from the second hole, the guide includes a through hole penetrating through a sidewall of the fourth hole in a radial direction of the fourth hole, and an opening of the through hole located at an outer side of the guide is at least partially non-overlapping with the positioning sleeve extension.

For example, in one embodiment of the disclosure, the guide assembly further includes an elastic ring sleeved on the outer side wall of the positioning sleeve extension portion and covering the opening of the through hole on the outer side surface of the guide.

For example, a pilot assembly provided in an embodiment of the present disclosure further includes an oil seal disposed at the second end of the pilot, the oil seal configured to seal oil entering the pilot.

At least one embodiment of the present disclosure provides a guide assembly comprising a guide assembly according to any one of the above and a piston rod inserted in a through hole of the guide.

For example, in the shock absorber provided in an embodiment of the present disclosure, the guide assembly further includes a positioning sleeve, the positioning sleeve is sleeved on an outer side surface of the first end portion of the guide, the first cylinder sleeve is sleeved on the positioning sleeve, the second cylinder sleeve is sleeved on the second end portion of the guide, and the first cylinder is in the cavity of the second cylinder.

Through the first recess in the director subassembly, can get into the inner space of director in the fluid that is located the outside of director subassembly first end to gas or bubble in the fluid can be got rid of through the director, and then noise and the vibration problem that gas or bubble in the fluid brought can be eliminated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure, not to limit the present disclosure.

FIG. 1 is a schematic cross-sectional view of a guide assembly according to one embodiment of the present disclosure;

FIG. 2 is a schematic perspective view of the guide shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a portion of the structure shown in FIG. 1; and

fig. 4 is a schematic cross-sectional view of a shock absorber according to an embodiment of the present disclosure.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Unless otherwise defined, features such as "parallel", "perpendicular" and "identical" as used in the embodiments of the present disclosure include cases where "parallel", "perpendicular", "identical" and the like are in strict sense, and cases where "substantially parallel", "substantially perpendicular", "substantially identical" and the like include certain errors. For example, the above-described "approximately" may indicate that the difference of the compared objects is within 10%, or 5%, of the average value of the compared objects. Where the number of a component or element is not specifically indicated in the following description of embodiments of the present disclosure, it means that the component or element may be one or more or may be understood as at least one. "at least one" means one or more, and "a plurality" means at least two.

The unavoidable gas or bubbles can exist in the oil liquid in the oil storage cylinder of the shock absorber, the piston rod of the shock absorber moves up and down in the working process, and the pressure change of the oil liquid can cause the bubble in the oil liquid to be broken, so that local hydraulic impact is caused, noise and vibration are caused, and the stability of the performance of the shock absorber is affected.

Embodiments of the present disclosure provide a guide assembly and a shock absorber. The guide assembly includes a guide and a guide bushing. The guide includes a through hole penetrating in an axial direction thereof, and has a first end portion and a second end portion opposite to each other in the axial direction. The through hole includes a first hole and a second hole communicating with each other, the first hole and the second hole being a part of the through hole. The diameter of the first hole is smaller than that of the second hole, the second hole is positioned at the first end of the guide, and the first hole is positioned at one side of the second hole close to the second end. The side wall of the second hole is provided with a first groove, and the guide bushing is positioned in the second hole and is attached to the side wall outside the first groove of the second hole, so that the first groove forms a channel for communicating the outside of the guide with the inner space of the guide.

By providing the first groove communicating the exterior of the guide and the interior space of the guide on the side wall of the second hole of the guide assembly, and the second hole is located at the first end of the guide, gas or bubbles in the oil located at the exterior of the first end of the guide assembly can enter the interior space of the guide through the first groove, so that the gas or bubbles in the oil can be discharged through the guide, and noise and vibration problems caused by the gas or bubbles in the oil can be eliminated.

The guide assembly and the damper provided in the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

An embodiment of the present disclosure provides a guide assembly. FIG. 1 is a schematic cross-sectional view of a guide assembly according to one embodiment of the present disclosure; fig. 2 is a perspective view of the guide shown in fig. 1. As shown in fig. 1 and 2, the guide assembly 100 includes a guide 110 and a guide bushing 120. The guide 110 includes a through hole 111 penetrating in an axial direction X thereof, and has a first end 110a and a second end 110b opposite to each other in the axial direction X. The through hole 111 includes a first hole 112 and a second hole 113 communicating with each other, the first hole 112 and the second hole 113 being part of the through hole 111. The diameter of the first hole 112 is smaller than the diameter of the second hole 113, the second hole 113 is located at the first end 110a of the guide 110, and the first hole 112 is located at a side of the second hole 113 near the second end 110b. The second hole 113 is provided with a first groove 114 on a sidewall thereof, and the guide bush 120 is positioned in the second hole 113 and is fitted with a sidewall outside the first groove 114 of the second hole 113 such that the first groove 114 forms a passage communicating the outside of the guide 110 with the inner space of the guide 110.

When the guide assembly 100 is used in a shock absorber, the guide assembly 100 is sleeved on the piston rod 210, the guide bushing 120 is attached to the piston rod 210, oil is stored in the shock absorber, and the oil is located on one side of the first end 110a of the guide 110, which is far away from the second end 110b. The first groove 114 is formed on the sidewall of the second hole 113 of the guide assembly 100, and the first groove 114 communicates the exterior of the guide 110 with the interior space of the guide 110, so that gas or bubbles in the oil in the shock absorber can enter the interior space of the guide 110 through the first groove 114, and the gas or bubbles in the oil can be discharged through the guide 110, and noise and vibration problems caused by the gas or bubbles in the oil can be eliminated.

In some examples, as shown in fig. 1 and 2, the first groove 114 may extend in a direction parallel to the axial direction X. For example, the first groove 114 may be a straight line segment extending in a direction parallel to the axial direction X. Thus, gas or bubbles in the oil may better and faster enter the interior space of the guide 110 via the first groove 114. The extending direction of the first groove 114 is not limited in the embodiments of the present disclosure, for example, the extending direction of the first groove 114 may form an included angle with the axial direction X.

For example, the extending direction of the first groove 114 may be an arc, or a combination of a straight line and an arc, which is not limited by the embodiment of the present disclosure.

In some examples, as shown in fig. 1 and 2, the first groove 114 has the same size as the second hole 113 in a direction parallel to the axial direction X; the end of the guide bush 120 near the second end 110b is flush with the end of the second hole 113 near the second end 110b. The embodiment of the present disclosure does not limit the positional relationship of the end of the guide bush 120 remote from the second end 110b and the end of the second hole 113 remote from the second end 110b. For example, an end of the guide bushing 120 remote from the second end 110b may be flush with an end of the second bore 113 remote from the second end 110b. For example, an end of the guide bushing 120 remote from the second end 110b may also be closer to or farther from the second end 110b than an end of the second bore 113 remote from the second end 110b. Thereby, the first groove 114 may better form a passage communicating the outside of the guide 110 with the inner space of the guide 110.

For example, in a direction parallel to the axial direction X, the first groove 114 may have the same size as the second hole 113, and an end of the guide bush 120 close to the second end 110b may be further away from the second end 110b than an end of the second hole 113 close to the second end 110b. Thereby, the first groove 114 may better form a passage communicating the outside of the guide 110 with the inner space of the guide 110.

In some examples, as shown in fig. 1 and 2, a first groove 114 is provided on a sidewall of the second hole 113, an upper end 114a of the first groove 114 reaches an upper edge 113a of the second hole 113, and a lower end 114b of the first groove 114 reaches a lower edge 113b of the second hole 113. Thus, the first groove 114 may form a passage communicating the outside of the guide 110 with the inner space of the guide 110.

In the sectional view shown in fig. 1, the sectional line is cut through only one first groove 114, and thus, one side of the second hole 113 has the first groove 114, and the other side of the second hole 113 has no first groove 114.

In some examples, as shown in fig. 1 and 2, both ends of the guide bushing 120 are flush with both ends of the second hole 113. The embodiments of the present disclosure are not limited in this regard, for example, both ends of the guide bushing 120 may not be flush with both ends of the second hole 113. For example, the axial length of the guide bushing 120 is smaller than the axial length of the second bore 113. For example, the upper end 114a of the first groove 114 may be closer to the upper edge 113a of the second hole 113 than the upper end of the guide bush 120, and the lower end 114b of the first groove 114 may be closer to the lower edge 113b of the second hole 113 than the lower end of the guide bush 120. For example, the upper end 114a and the lower end 114b of the first groove 114 are located at the outer sides of both ends of the guide bush 120, whereby the first groove 114 may better form a passage communicating the outside of the guide 110 with the inner space of the guide 110, and gas or bubbles in the oil may be better discharged through the guide 110 via the first groove 114.

For example, the upper end 114a of the first groove 114 may include at least one port, or the lower end 114b of the first groove 114 may include at least one port. For example, the first groove 114 may not be a straight line segment or an arc line in the extending direction, and may have branches at both ends, and the shape of the first groove 114 in the extending direction is not limited in the embodiments of the present disclosure.

In some examples, as shown in fig. 2, a plurality of first grooves 114 may be provided at intervals on the sidewall of the second hole 113, thereby forming a plurality of passages communicating the outside of the guide 110 with the inner space of the guide 110, and gas or bubbles in the oil may be better and more quickly discharged through the plurality of first grooves 114. The number and arrangement of the first grooves 114 are not limited in the embodiments of the present disclosure. For example, the number of first grooves 114 may be a positive integer greater than or equal to 1. For example, the plurality of first grooves 114 are uniformly provided on the side wall of the second hole 113 in the circumferential direction of the second hole 113.

In some examples, as shown in fig. 2, the cross-section of the first groove 114 may be a graph composed of an arc or a straight line such as a semicircle, or may be a polygon such as a trapezoid or a triangle. The embodiment of the present disclosure does not limit the shape of the cross section of the first groove 114.

In some examples, the dimensions of the cross-section of the first groove 114, e.g., the radius, length, width, depth, etc. of the cross-section, may be designed and adjusted according to the dimensions of the guide 110 or the damping performance of the shock absorber in which the guide 110 is located, etc. The size of the cross section of the first groove 114 is not particularly limited by the embodiments of the present disclosure.

In some examples, as shown in fig. 2, the dimensions of the cross-section of the first groove 114 may be the same in the direction of extension of the first groove 114. The embodiment of the present disclosure is not limited thereto, and for example, the size of the cross section of the first groove 114 may be varied in the extending direction of the first groove 114, for example, may be gradually increased or decreased.

In some examples, as shown in fig. 1, the inner sidewall of the guide bushing 120 may also have a wear resistant coating 121, whereby the service life of the piston rod 210 and the guide bushing 120 may be enhanced, etc. The disclosed embodiments do not limit the structure and materials of the guide bushing.

In some examples, as shown in fig. 1 and 2, the guide assembly 100 may further include an oil seal 160. For example, the oil seal 160 may include a skeleton 161, a seal lip 162, and a spring 163. An oil seal 160 is disposed at the second end 110b of the guide 110, the oil seal 160 being configured to seal oil entering the guide 110.

In some examples, as shown in fig. 1, the pilot assembly 100 may also include a slinger 130. The through hole 111 further includes a third hole 115, and the third hole 115 is a part of the through hole 111. The third hole 115 is located between the first hole 112 and the second hole 113. The third hole 115 has a diameter larger than that of the first hole 112 and smaller than that of the second hole 113, and the slinger 130 is provided in the second hole 113. By arranging the oil retainer 130, on one hand, the impact force of oil to the oil seal 160 can be reduced, so that the risk of oil leakage can be reduced, the manufacturing cost of the product is reduced, the internal leakage is reduced, and the stability of the product is improved; on the other hand, the oil slinger 130 may also reduce the flow rate of the oil flowing from the first groove 114 toward the oil slinger 130, thereby reducing the impact of the first groove 114 on the damping effect of the shock absorber in which the deflector assembly 100 is located and improving the stability of the shock absorber.

In some examples, as shown in fig. 1, the outer ring size of the slinger 130 may be smaller than the aperture of the third bore 115, whereby oil passing through the first groove 114 may enter the pilot 110 through a gap between the slinger 130 and the third bore 115.

In some examples, as shown in fig. 1 and 2, the guide 110 is formed with a land 116 between the first aperture 112 and the third aperture 115, the land 116 having an inner circumference 116a intersecting a sidewall of the first aperture 112 and an outer circumference 116b intersecting a sidewall of the third aperture 115. Since the diameter of the third hole 115 is larger than the diameter of the first hole 112, the mesa 116 faces the first end 110a of the guide 110. The mesa 116 is provided with a second groove 117, and both ends in the extending direction of the second groove 117 are located on the inner circumference 116a and the outer circumference 116b, respectively. Oil entering through the first groove 114 may flow in the guide 110 through the gap between the slinger 130 and the third bore 115, the second groove 117, and the gap between the first bore 112 and the piston rod 210, in sequence. Therefore, by providing the second groove 117 on the table 116, the air or bubbles in the oil can flow out through the guide 110 better and faster, so that the noise and vibration generated by the air or bubbles in the oil can be reduced or eliminated better and faster, and the stability of the shock absorber used by the guide assembly 100 is improved. Meanwhile, the oil flowing in from the first groove 114 and the second groove 117 can also lubricate the oil seal 160, so that the service life of the oil seal 160 is prolonged.

In the sectional view shown in fig. 1, the sectional line is cut to only one second groove 117, and thus, only one second groove 117 is shown.

In some examples, as shown in fig. 1 and 2, the second groove 117 extends radially along the inner circumference 116a or the outer circumference 116b. Thus, the gas or bubbles in the oil can be discharged through the second groove 117 more quickly and better. The extending direction of the second groove 117 is not limited in the embodiments of the present disclosure, for example, the extending direction of the second groove 117 may form an angle with the radial direction of the inner circumference 116a or the outer circumference 116b.

For example, the extending direction of the second groove 117 may also be an arc, or a combination of a straight line and an arc, which is not limited by the embodiment of the present disclosure.

In some examples, as shown in fig. 2, a plurality of second grooves 117 may be provided on the table 116 at intervals, so that gas or bubbles in the oil may be better and faster discharged through the plurality of second grooves 117. The embodiment of the present disclosure does not limit the number and arrangement of the second grooves 117. For example, the number of the second grooves 117 is a positive integer of 1 or more. For example, the plurality of second grooves 117 are uniformly provided on the mesa 116 along the circumferential direction of the inner circumference 116a or the outer circumference 116b.

In some examples, as shown in fig. 2, the cross-sectional shape of the second groove 117 may be a trapezoid, a triangle, or the like, or may be a graph composed of an arc or a straight line, and the cross-sectional shape of the second groove 117 is not limited in the embodiments of the present disclosure.

In some examples, the dimensions of the cross-section of the second groove 117, e.g., the radius, length, width, depth, etc. of the cross-section, may be designed and adjusted according to the dimensions of the guide 110 or the damping performance of the shock absorber in which the guide 110 is located, etc. The embodiment of the present disclosure does not particularly limit the size of the cross section of the second groove 117.

In some examples, as shown in fig. 2, the dimensions of the cross-section of the second groove 117 may be the same in the direction of extension of the second groove 117. The embodiment of the present disclosure is not limited thereto, and for example, the size of the cross section of the second groove 117 may also vary in the extending direction of the second groove 117, for example, may become gradually larger or smaller.

In some examples, as shown in fig. 2, the first grooves 114 and the second grooves 117 may be staggered in a circumferential direction. The embodiment of the present disclosure does not limit the positional relationship of the first groove 114 and the second groove 117. For example, the extending directions of the first groove 114 and the second groove 117 may also intersect. For example, the first groove 114 and the second groove 117 may directly communicate with each other.

In some examples, as shown in fig. 1, the guide assembly 100 may further include a positioning sleeve 140. The positioning sleeve 140 is sleeved on the outer side surface of the guide 110. The positioning sleeve 140 includes a positioning sleeve body portion 141 and a positioning sleeve extension portion 142, the positioning sleeve body portion 141 being located at the first end portion 110a, the positioning sleeve extension portion 142 extending toward a side away from the first end portion 110a. By providing the positioning sleeve 140, the universality of the guide 110 can be improved, and for the shock absorbers 200 with different sizes and performances, only the different positioning sleeves 140 are matched, and the guide 110 does not need to be redeveloped, so that the mold development cost of the guide 110 is reduced.

For example, the material of the positioning sleeve 140 may be metal, and the present disclosure is not limited to a specific material of the positioning sleeve 140.

Fig. 3 is a schematic cross-sectional view of a portion of the structure shown in fig. 1. In some examples, as shown in fig. 1 and 3, the through-hole 111 further includes a fourth hole 118, the fourth hole 118 being a portion of the through-hole 111. The fourth hole 118 is located at a side of the first hole 112 remote from the second hole 113, and the guide 110 includes a through hole 118a penetrating a sidewall of the fourth hole 118 in a radial direction of the fourth hole 118, and an opening of the through hole 118a located at an outer side of the guide 110 is at least partially non-overlapped with the positioning sleeve extension 142. For example, the opening of the through-hole 118a is not blocked by the extension 142 of the positioning sleeve 140. For example, the opening of the through-hole 118a may be at least partially unobstructed by the extension 142 of the positioning sleeve 140. Accordingly, the oil flowing into the guide 110 through the first groove 114 may flow out through the through hole 118a, so that gas or bubbles in the oil flow out through the through hole 118 a. The embodiment of the present disclosure does not limit the axial direction and the opening shape of the through-hole 118a, for example, the axial direction of the through-hole 118a may form an angle with the axial direction of the fourth hole 118. For example, the opening shape of the through-hole 118a may be a circle, a square, a U-shape, or the like.

In some examples, as shown in fig. 3, a plurality of through holes 118a may be provided on a sidewall of the fourth hole 118, so that the oil flowing into the guide 110 may be more quickly and better discharged from the plurality of through holes 118 a. The embodiment of the present disclosure does not limit the number, position, size, shape, etc. of the through holes 118 a.

In some examples, as shown in fig. 1 and 3, the guide assembly 100 further includes an elastic ring 150, the elastic ring 150 being sleeved on the outer sidewall of the positioning sleeve extension 142 and covering the opening of the through hole 118a on the outer side of the guide 110. The elastic ring 150 can be used for covering the through hole 118a to fill the guide 110 with oil, so that the lubrication effect of the oil on the oil seal 160 is improved, and the service life of the oil seal 160 is prolonged; on the other hand, the elastic ring 150 may also function as a check valve, and gas or bubbles in the oil in the guide 110 may flow out through the elastic ring 150, but gas outside the elastic ring 150 may not enter the guide 110, thereby avoiding gas from being mixed into the oil.

For example, the material of the elastic ring 150 may be rubber, and the specific material of the elastic ring 150 is not limited in the embodiments of the present disclosure.

In some examples, as shown in fig. 1 and 3, both ends of the elastic ring 150 may be respectively sleeved on the outer sidewall of the guide 110 and the outer sidewall of the positioning sleeve extension 142 in the axial direction X, and the opening of the through-hole 118a is covered by the middle portion of the elastic ring 150. Thus, on the one hand, both ends of the elastic ring 150 may be supported by the outer sidewall of the guide 110 and the positioning sleeve extension 142, respectively; on the other hand, the elastic ring 150 can cover the through hole 118a more stably, thereby functioning as a seal and a check valve more stably.

As shown in fig. 1 and 3, the elastic ring 150 is sleeved on the positioning sleeve extension portion 142, and the positioning sleeve extension portion 142 plays a supporting role on the elastic ring 150, so that compared with the case that a part is independently arranged to support the elastic ring 150, the positioning sleeve extension portion 142 and the positioning sleeve main body portion 141 are integrally designed, assembly errors can be reduced, and therefore sealing performance of the guide assembly 100 can be better achieved, and manufacturing cost and assembly cost can be reduced.

In some examples, as shown in fig. 1 and 3, the inner sidewall of the spacer extension 142 may partially conform to the sidewall of the guide 110, and the spacer extension 142 may be securely sleeved over the guide 110 by partially conforming to the sidewall of the guide 110.

For example, as shown in fig. 1 to 3, the outer sidewall of the guide 110 has a plurality of protrusions 110c, and the inner sidewall of the positioning sleeve extension 142 may be attached to the sidewalls of the plurality of protrusions 110c, so that the positioning sleeve extension 142 may be stably sleeved on the plurality of protrusions 110c of the guide 110.

For example, as shown in fig. 1 to 3, the plurality of protruding portions 110c of the guide 110 are staggered with the through holes 118a in the circumferential direction of the guide 110. At the position of the through hole 118a, the positioning sleeve extension 142 is not attached to the outer side wall of the guide 110, and a gap is formed between the positioning sleeve extension 142 and the outer side wall of the guide 110, so that by providing a gap at the position of the through hole 118a, the speed of oil is buffered, the impact on the elastic ring 150 covering the opening of the through hole 118a can be reduced, and the service life of the elastic ring 150 can be prolonged.

In some examples, as shown in fig. 1 and 3, the through-hole 111 may further include a fifth hole 119, the fifth hole 119 being a portion of the through-hole 111. A fifth aperture 119 is located at the second end 110b. The oil seal 160 is disposed in the fifth hole 119, and the oil seal 160 can realize a sealing connection between the guide assembly 100 and the piston rod 210 when the guide assembly 100 is sleeved on the piston rod 210. The embodiment of the present disclosure is not limited to the fifth hole 119, for example, the fifth hole 119 may be omitted, the fourth hole 118 may extend to the second end 110b from a side of the first hole 112, and the oil seal 160 may be disposed on the fourth hole 118.

An embodiment of the present disclosure also provides a shock absorber. Fig. 4 is a schematic cross-sectional view of a shock absorber according to an embodiment of the present disclosure. As shown in fig. 4, the shock absorber 200 includes any one of the above-mentioned guide assemblies 100 and a piston rod 210, and the piston rod 210 is inserted into the through hole 111 of the guide 110, whereby the shock absorber 200 has advantageous effects corresponding to those of the guide assembly 100.

In some examples, as shown in fig. 1 and 4, the shock absorber 200 further includes a first cylinder 220 and a second cylinder 230, the guide assembly 100 further includes a positioning sleeve 140, the positioning sleeve 140 is sleeved on an outer side surface of the first end 110a of the guide 110, the first cylinder 220 is sleeved on the positioning sleeve 140, the second cylinder 230 is sleeved on the second end 110b of the guide 110, and the first cylinder 220 is within the cavity of the second cylinder 230. For example, during use of the shock absorber 200, oil may be stored in the first cylinder 220, air or high pressure gas may be stored in the upper portion of the second cylinder 230, and oil may be stored in the lower portion. The gas or bubbles in the oil in the first cylinder 220 may be discharged into the second cylinder 230 through the guide 110 via the first groove 114, so that the gas or bubbles in the oil in the first cylinder 220 may be eliminated, thereby reducing or eliminating noise and vibration problems generated by the gas or bubbles in the oil, and improving the stability of the guide damper 200.

The following points need to be described:

(1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to the general design.

(2) Features of the same and different embodiments of the disclosure may be combined with each other without conflict.

The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it should be covered in the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (14)

1. A guide assembly includes a guide and a guide bushing,

wherein the guide includes a through hole penetrating in an axial direction thereof, and has a first end portion and a second end portion opposite to each other in the axial direction;

the through hole includes a first hole and a second hole communicating with each other, the first hole having a smaller diameter than the second hole, the second hole being located at a first end of the guide, the first hole being located at a side of the second hole near the second end,

the side wall of the second hole is provided with a first groove, and the guide bushing is positioned in the second hole and is attached to the side wall outside the first groove of the second hole, so that the first groove forms a channel for communicating the outer part of the guide with the inner space of the guide.

2. The guide assembly of claim 1, wherein the first groove extends in a direction parallel to the axial direction.

3. The guide assembly of claim 2, wherein the first groove has the same dimension as the second hole in a direction parallel to the axial direction, and an end of the guide bushing near the second end is flush with an end of the second hole near the second end or is farther from the second end than an end of the second hole near the second end.

4. The guide assembly of claim 1, wherein a plurality of the first grooves are spaced apart on a sidewall of the second bore.

5. The guide assembly of any of claims 1-4, further comprising an oil retainer,

wherein the through hole further comprises a third hole, the third hole is positioned between the first hole and the second hole, the diameter of the third hole is larger than the diameter of the first hole and smaller than the diameter of the second hole,

the oil slinger is disposed within the second bore.

6. The guide assembly of claim 5, wherein the guide defines a land between the first and third bores, the land having an inner circumference intersecting a sidewall of the first bore and an outer circumference intersecting a sidewall of the third bore,

the table top is provided with a second groove, and two ends of the second groove in the extending direction are respectively positioned on the inner circumference and the outer circumference.

7. The guide assembly of claim 6, wherein the second groove extends radially of the inner circumference or the outer circumference.

8. The guide assembly of claim 6, wherein a plurality of the second grooves are spaced apart on the table.

9. The guide assembly according to any one of claims 1-4, further comprising a positioning sleeve disposed over an outer side of the guide,

the positioning sleeve comprises a positioning sleeve main body part and a positioning sleeve extending part, wherein the positioning sleeve main body part is positioned at the first end part, and the positioning sleeve extending part extends towards one side far away from the first end part.

10. The guide assembly of claim 9, wherein the through-hole further comprises a fourth hole at a side of the first hole remote from the second hole, the guide comprising a through-hole penetrating a sidewall of the fourth hole in a radial direction of the fourth hole,

the opening of the through hole on the outer side surface of the guide is at least partially not overlapped with the positioning sleeve extension part.

11. The guide assembly of claim 10, further comprising an elastic ring,

the elastic ring is sleeved on the outer side wall of the locating sleeve extension part and covers the opening of the through hole, which is positioned on the outer side face of the guide.

12. The guide assembly of claim 11, further comprising an oil seal,

wherein the oil seal is disposed at the second end of the guide, the oil seal configured to seal oil entering the guide.

13. A shock absorber, comprising:

a guide assembly according to any one of claims 1 to 8; and

the piston rod is provided with a piston rod,

wherein the piston rod is inserted into the through hole of the guide.

14. The shock absorber according to claim 13, further comprising a first cylinder and a second cylinder,

the guide device assembly further comprises a positioning sleeve, the positioning sleeve is sleeved on the outer side face of the first end portion of the guide device, the first cylinder barrel is sleeved on the positioning sleeve, the second cylinder barrel is sleeved on the second end portion of the guide device, and the first cylinder barrel is arranged in the containing cavity of the second cylinder barrel.