Cap assembly for shock absorber, shock absorber and vehicle
By introducing a cylindrical component, a rotating component, and a roller structure into the shock absorber, sliding friction is converted into rolling friction, which solves the friction noise problem between the buffer block and the cap component and improves the driving comfort of the vehicle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HYUNDAI MOTOR CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-04-28
AI Technical Summary
In existing shock absorbers, friction between the buffer block and the cap component causes noise problems and increases the risk of cracking at the lip end of the buffer block.
Design a cap assembly comprising a cylindrical component, a rotating component, and multiple rollers. By having the rollers roll between the cylindrical component and the rotating component, sliding friction is reduced and converted into rolling friction, thereby reducing noise.
It effectively reduces noise when the piston rod moves downward, reduces noise caused by friction, and improves driving comfort.
Smart Images
Figure CN224174469U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle technology, and in particular to a cap assembly for a shock absorber, a shock absorber, and a vehicle. Background Technology
[0002] As a key component of the vehicle suspension system, the core function of the shock absorber is to mitigate and dampen the vibrations and impacts caused by uneven road surfaces during vehicle operation, thereby improving vehicle stability and ride comfort.
[0003] A shock absorber mainly consists of a cylinder block, piston rod, cap component, and buffer block. Specifically, the buffer block is fitted around the outer circumference of the piston rod and located at the top of the piston rod; the cap component is fitted around the top of the cylinder block. When the piston rod moves downward relative to the cylinder block, the buffer block moves downward synchronously and comes into contact with the cap component. During this contact process, the buffer block rotates relative to the cap component, resulting in sliding friction and noise, which affects ride comfort. Furthermore, high friction between the buffer block and the cap component increases the risk of cracking at the lip end of the buffer block after long-term durability.
[0004] Therefore, how to overcome the aforementioned shortcomings of existing technologies is a technical problem that all sectors urgently need to solve. Utility Model Content
[0005] The purpose of this invention is to reduce the friction between the buffer block and the cap component, thereby reducing the noise caused by the downward displacement of the piston rod.
[0006] To achieve the above objectives, the first aspect of this utility model provides a cap assembly for a shock absorber, comprising: a cylindrical member having a receiving space, and having a first opening at its lower end communicating with the receiving space for fitting onto the cylinder of the shock absorber through the first opening; a rotating member disposed at the upper end of the cylindrical member and capable of rotating relative to the cylindrical member; and a plurality of rollers disposed between the cylindrical member and the rotating member, and capable of providing support for the rotating member, wherein the plurality of rollers are capable of rolling between the cylindrical member and the rotating member.
[0007] In some exemplary embodiments, the rotating member has a second opening through which the piston rod of the shock absorber passes, and the rotating member also forms a continuous first annular groove, the portions of which a plurality of rollers contact the rotating member are located in the first annular groove and are able to roll within the first annular groove.
[0008] In some exemplary embodiments, the annular cage has an inner edge defining a third opening through which the piston rod of the shock absorber can pass, and the cage has a plurality of retaining grooves evenly distributed along the circumference of the cage, with a plurality of rollers located in the plurality of retaining grooves respectively.
[0009] In some exemplary embodiments, a fixing member is further included, which is fixedly disposed on the cylindrical member, a plurality of rollers are located between the fixing member and the rotating member, and the fixing member is formed with a fourth opening and a continuous second annular groove, the fourth opening allowing the piston rod of the shock absorber to pass through, and the plurality of rollers being located in the second annular groove and capable of rolling within the second annular groove.
[0010] In some exemplary embodiments, the cylindrical member forms a mounting boss that projects radially inward, and the fixing member is fixed to the mounting boss, wherein the mounting boss has a mounting hole, the fixing member has a mounting post corresponding to the mounting hole, and the mounting post and the mounting hole are interference-fitted; the radially inward edge of the mounting boss defines a fifth opening that allows the piston rod of the shock absorber to pass through, but prevents the cylinder of the shock absorber from passing through.
[0011] In some exemplary embodiments, the mounting boss is formed near the upper end of the cylindrical member and divides the interior of the cylindrical member into an upper mounting space and a lower receiving space.
[0012] In some exemplary embodiments, the rotating member is at least partially located outside the mounting space.
[0013] In some exemplary embodiments, the mounting boss is a continuous annular structure.
[0014] In some exemplary embodiments, the rotating component, the cage, the plurality of rollers, and the fixed component constitute a planar thrust bearing.
[0015] In some exemplary embodiments, the rotating member has a continuous annular groove; the fixing member has a plurality of extensions distributed circumferentially thereon, each extension extending from the fixing member to the annular groove, and the extensions have a locking portion formed at a position corresponding to the annular groove, the locking portion being able to engage with the annular groove.
[0016] In some exemplary embodiments, the plurality of rollers are tapered rollers, and the first annular groove and the second annular groove are formed with inclined surfaces adapted to the tapered rollers.
[0017] The second aspect of this utility model provides a shock absorber, comprising: a cylinder; a piston rod; a buffer block disposed at the top end of the piston rod; and a cap assembly according to the first aspect, wherein a cylindrical member of the cap assembly is sleeved on the top end of the cylinder, and the piston rod passes through a first opening, a second opening, a third opening, a fourth opening, and a fifth opening of the cap assembly.
[0018] A third aspect of this utility model provides a vehicle equipped with the cap assembly described in the first aspect, or with the shock absorber described in the second aspect.
[0019] According to the cap assembly provided by this utility model, the rotating member can contact the buffer block when the shock absorber moves downward, and can rotate with the buffer block relative to the cylindrical member, thereby reducing the sliding friction between the buffer block and the cap assembly. Multiple rollers can convert the sliding friction between the rotating member and the cylindrical member into rolling friction, further reducing the sliding friction inside the cap assembly. Therefore, the cap assembly provided by this utility model can reduce noise caused by the downward displacement of the piston rod. Attached Figure Description
[0020] Figure 1 This is an exploded view of the cap assembly;
[0021] Figure 2 This is a structural schematic diagram of a cylindrical component;
[0022] Figure 3 This is a cross-sectional structural diagram of the cylindrical component;
[0023] Figure 4 This is a schematic diagram of the bottom structure of the rotating component;
[0024] Figure 5 This is a top view of the cage structure.
[0025] Figure 6 This is a structural diagram of the fixed component;
[0026] Figure 6a yes Figure 6 Enlarged schematic diagram of the structure within the dashed box;
[0027] Figure 7 It is a longitudinal sectional view of the assembled fixed components, rollers, cages, and rotating components;
[0028] Figure 7a yes Figure 7 Enlarged schematic diagram of the structure within the dashed box;
[0029] Figure 8 This is a longitudinal sectional view of the cap assembly.
[0030] Figure 9 This is a structural diagram of a shock absorber.
[0031] Explanation of reference numerals in the attached figures:
[0032] 100. Cap assembly; 110. Cylinder component; 111. Mounting boss; 112. Mounting hole; 113. First opening; 114. Mounting space; 115. Accommodation space; 116. Fifth opening; 120. Rotating component; 121. First annular groove; 122. Second opening; 123. Annular groove; 130. Roller; 140. Fixing component; 141. Second annular groove; 142. Fourth opening; 143. Mounting post; 144. Extension; 145. Locking block; 150. Cage; 151. Third opening; 152. Retaining groove; 200. Shock absorber; 210. Cylinder block; 220. Piston rod; 230. Buffer block.
[0033] Unless otherwise stated, the same reference numerals or symbols denote the same elements in the accompanying drawings.
[0034] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the principles of this invention. The specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific application and environment in which they will be used.
[0035] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation
[0036] The present invention will now be described in detail with reference to various embodiments, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.
[0037] For ease of interpretation and precise definition of the appended claims, the terms “upper,” “lower,” “top,” “bottom,” “inner,” and “outer” are used to describe features of exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.
[0038] It should be noted that the downward movement of the shock absorber mentioned in this utility model refers to the process of the piston rod of the shock absorber moving downward relative to the cylinder body of the shock absorber. At this time, the buffer block will move downward along with the piston rod. Furthermore, the downward movement of the piston rod relative to the cylinder body includes: 1) the cylinder body is stationary and the piston rod moves downward; 2) the piston rod is stationary and the cylinder body moves upward; 3) the piston rod moves downward and the cylinder body moves upward simultaneously.
[0039] The following is combined with Figures 1 to 9 This invention introduces the cap assembly 100 provided by this utility model.
[0040] See also Figure 1 The cap assembly 100 provided by this utility model includes a cylindrical component 110, multiple rollers 130, and a rotating component 120.
[0041] See Figure 9 The cylinder member 110 can be sleeved onto the upper end of the cylinder body 210 of the shock absorber 200 to install the cap assembly 100 to the shock absorber 200. Specifically, see reference... Figure 2 and Figure 3 The cylindrical member 110 has a receiving space 115, and the lower end of the cylindrical member 110 is provided with a first opening 113 communicating with the receiving space 115. The cylindrical member 110 can be sleeved on the top of the cylinder 210 of the shock absorber 200 through the first opening 113.
[0042] See also Figure 1 and Figure 8 The rotating member 120 is disposed at the upper end of the cylindrical member 110. The rotating member 120 is capable of rotating relative to the cylindrical member 110. During the downward movement of the shock absorber 200, the buffer block 230 not only moves towards the cap assembly 100, but also rotates relative to the cap assembly 100. After the buffer block 230 contacts the rotating member 120, the rotating member 120 can rotate relative to the cylindrical member 110 along with the buffer block 230.
[0043] See Figure 4 The rotating member 120 has a second opening 122 through which the piston rod 220 of the shock absorber 200 can pass.
[0044] See also Figure 1 and Figure 8 Multiple rollers 130 are disposed between the cylindrical member 110 and the rotating member 120. The multiple rollers 130 can provide support for the rotating member 120 and can roll between the cylindrical member 110 and the rotating member 120 as the rotating member 120 rotates relative to the cylindrical member 110.
[0045] See Figure 7Multiple rollers 130 are in direct contact with the rotating member 120, and the rotating member 120 is also formed with a first annular groove 121 that can accommodate multiple rollers 130. The portions of multiple rollers 130 that are in contact with the rotating member 120 are located in the first annular groove 121, and the multiple rollers 130 can roll in the first annular groove 121.
[0046] In some exemplary embodiments, the cap assembly 100 further includes a retainer 150 disposed between the cylindrical member 110 and the rotating member 120. See also Figure 5 The retainer 150 is a ring structure with a third opening 151 defined on its inner edge, through which the piston rod 220 of the shock absorber 200 can pass.
[0047] The cage 150 also has a plurality of retaining grooves 152, which are evenly distributed along the circumference of the cage 150. Furthermore, the number of retaining grooves 152 is the same as the number of rollers 130, so that the rollers 130 can be located in the plurality of retaining grooves 152 respectively, so as to correspond one-to-one with the plurality of retaining grooves 152.
[0048] In some exemplary embodiments, see reference to Figure 1 and Figure 9 The cap assembly 100 also includes a fixing member 140.
[0049] See Figure 8 The fixed member 140 is fixedly mounted on the cylindrical member 110. That is, as the rotating member 120 rotates relative to the cylindrical member 110, it also rotates relative to the fixed member 140. (See also...) Figure 6 and Figure 7 Multiple rollers 130 are in direct contact with the fixed member 140. The fixed member 140 has a second annular groove 141, and the portion of the multiple rollers 130 that contacts the fixed member 140 is located within the second annular groove 141. The multiple rollers 130 are able to roll within the second annular groove 141.
[0050] It is understood that the plurality of rollers 130 can be held by the rotating member 120 and the fixed member 140, and the radial positions of the plurality of rollers 130 in the rotating member 120 and the fixed member 140 are defined by the first annular groove 121 and the second annular groove 141. In particular, both the first annular groove 121 and the second annular groove 141 can be configured to be continuous.
[0051] In some exemplary embodiments, the plurality of rollers 130 are tapered rollers, and the first annular groove 121 and the second annular groove 141 are formed with inclined surfaces adapted to the tapered rollers.
[0052] The fixing member 140 has a fourth opening 142, which allows the piston rod 220 of the shock absorber 200 to pass through.
[0053] The following is combined Figures 6 to 7a The connection relationship between the rotating component 120 and the fixed component 140 is described.
[0054] See also Figure 7 and Figure 7a The bottom of the rotating member 120 has a continuous annular groove 123, meaning the annular groove 123 is continuous around the circumference of the rotating member 120. (See also...) Figure 6 and Figure 6a The fixing member 140 forms a plurality of extensions 144 corresponding to the annular groove 123, and the plurality of extensions 144 are evenly distributed along the circumference of the fixing member 140.
[0055] See also Figures 7 to 7a Each extension 144 extends into the annular groove 123, and a locking portion 145 is formed on the extension 144 corresponding to the position of the annular groove 123, the locking portion 145 being able to engage with the annular groove 123. During the rotation of the rotating member 120 relative to the fixed member 140, the locking portion 145 is able to slide within the annular groove 123.
[0056] Understandably, see reference Figure 7 The fixed component 140, the cage 150, the multiple rollers 130, and the rotating component 120 actually constitute a planar thrust bearing.
[0057] The following is combined Figure 2 , Figure 3 , Figure 7 , Figure 8 The connection structure between the cylindrical component 110 and the fixed component 140 is described.
[0058] In some exemplary implementations, see [reference] Figure 2 and Figure 3 The cylindrical member 110 has a mounting boss 111 that protrudes radially inward. The mounting boss 111 is formed near the upper end of the cylindrical member 110, and a mounting hole 112 is provided on the top of the mounting boss 111.
[0059] See Figure 7 The fixing member 140 has a mounting post 143 corresponding to the mounting hole 112, and the mounting post 143 and the second annular groove 141 are located on opposite sides of the fixing member 140. (See reference...) Figure 3 , Figure 7 , Figure 8The mounting post 143 can be inserted into the mounting hole 112, wherein the mounting post 143 and the mounting hole 112 are interference fit to fix the fixing member 140 to the mounting boss 111.
[0060] In some exemplary embodiments, the mounting boss 111 can be formed as a continuous annular structure. See also... Figure 2 and Figure 3 The radially inner edge of the mounting boss 111 defines a fifth opening 116, which allows the piston rod 220 of the shock absorber 200 to pass through, but prevents the cylinder 210 of the shock absorber 200 from passing through. When the cylindrical member 110 is fitted onto the cylinder 210 of the shock absorber 200, the piston rod 220 of the shock absorber 200 can pass through the fifth opening 116, but the cylinder 210 of the shock absorber 200 is stopped by the mounting boss 111 and cannot pass through the fifth opening 116. Thus, the cylindrical member 110 can be held at the upper end of the cylinder 210.
[0061] See Figure 2 and Figure 3 The mounting boss 111 divides the interior of the cylindrical component 110 into an installation space 114 and a receiving space 115.
[0062] The mounting space 114 is located above the receiving space 115 and can accommodate the fixed member 140, multiple rollers 130, cage 150, and rotating member 120. However, at least a portion of the rotating member 120 is located outside the mounting space 114 to facilitate the contact between the buffer block 230 at the top of the piston rod 220 of the shock absorber 200 and the rotating member 120 when the shock absorber 200 moves downward.
[0063] The receiving space 115 is located below the installation space 114. When the cylinder component 110 is sleeved onto the cylinder body 210 of the shock absorber 200, the upper end of the shock absorber 200 can be received in the receiving space 115.
[0064] This utility model also provides a shock absorber 200. (See reference...) Figure 9 The shock absorber 200 includes a cylinder 210, a piston rod 220, a cap assembly 100, and a buffer block 230 disposed at the top of the piston rod 220. The cylindrical member 110 of the cap assembly 100 is sleeved on the top of the cylinder 210 through a first opening 113, while the piston rod 220 passes through a fifth opening 116, a fourth opening 142, a third opening 151, and a second opening 122.
[0065] As the shock absorber 200 descends, the piston rod 220 retracts into the cylinder 210, while the buffer block 230 moves toward the cap assembly 100 along with the piston rod 220 and rotates to a certain extent. After the buffer block 230 contacts the rotating member 120 of the cap assembly 100, it can drive the rotating member 120 of the cap assembly 100 to rotate together, thereby avoiding friction between the buffer block 230 and the cap assembly 100 and preventing noise caused by such friction.
[0066] This utility model also provides a vehicle that uses either the aforementioned cap assembly 100 or the aforementioned shock absorber 200. This avoids noise caused by friction between the buffer block 230 and the cap assembly 100, thereby improving the driving experience.
[0067] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A cap assembly for a shock absorber, characterized in that, include: A cylindrical component having a receiving space, and having a first opening at its lower end communicating with the receiving space, so as to be sleeved onto the cylinder body of the shock absorber through the first opening; A rotating member is disposed at the upper end of the cylindrical member and is capable of rotating relative to the cylindrical member; as well as Multiple rollers are disposed between the cylindrical member and the rotating member, and are capable of supporting the rotating member, wherein the multiple rollers are capable of rolling between the cylindrical member and the rotating member.
2. The cap assembly for a shock absorber according to claim 1, characterized in that, The rotating member has a second opening through which the piston rod of the shock absorber can pass, and the rotating member also forms a continuous first annular groove, the portions of which multiple rollers that contact the rotating member are located in the first annular groove and are able to roll within the first annular groove.
3. The cap assembly for a shock absorber according to claim 2, characterized in that, The ring-shaped cage has a third opening defined by its inner edge, through which the piston rod of the shock absorber can pass. The cage also has multiple retaining grooves evenly distributed along its circumference, and multiple rollers are located in the multiple retaining grooves respectively.
4. The cap assembly for a shock absorber according to claim 3, characterized in that, It further includes a fixing member fixedly disposed on the cylindrical member, a plurality of rollers located between the fixing member and the rotating member, and the fixing member forming a fourth opening and a continuous second annular groove, the fourth opening allowing the piston rod of the shock absorber to pass through, the plurality of rollers located in the second annular groove and capable of rolling within the second annular groove.
5. The cap assembly for a shock absorber according to claim 4, characterized in that, The cylindrical member forms a mounting boss that protrudes radially inward, and the fixing member is fixed to the mounting boss. The mounting boss has a mounting hole, and the fixing member has a mounting post corresponding to the mounting hole. The mounting post and the mounting hole are interference-fitted. The radially inner edge of the mounting boss defines a fifth opening that allows the piston rod of the shock absorber to pass through, but prevents the cylinder of the shock absorber from passing through.
6. The cap assembly for a shock absorber according to claim 5, characterized in that, The mounting boss is formed near the upper end of the cylindrical member and divides the interior of the cylindrical member into an upper mounting space and a lower receiving space.
7. The cap assembly for a shock absorber according to claim 6, characterized in that, The rotating component is at least partially located outside the mounting space.
8. The cap assembly for a shock absorber according to claim 5, characterized in that, The mounting boss is a continuous ring structure.
9. The cap assembly for a shock absorber according to claim 4, characterized in that, The rotating component, cage, multiple rollers, and fixed component constitute a planar thrust bearing.
10. The cap assembly for a shock absorber according to claim 5, characterized in that, The rotating component has a continuous annular groove formed on it; The fixing member has a plurality of extensions distributed circumferentially thereon, each extension extending from the fixing member to the annular groove, and the extensions having a locking part formed at the position corresponding to the annular groove, the locking part being able to engage with the annular groove.
11. The cap assembly for a shock absorber according to any one of claims 6-10, characterized in that, The multiple rollers are all tapered rollers, and the first and second annular grooves are formed with inclined surfaces adapted to the tapered rollers.
12. A shock absorber, characterized in that, include: Cylinder block; Piston rod; A buffer block is disposed at the top of the piston rod; According to any one of claims 1-11, the cap assembly has a cylindrical member sleeved on the top end of the cylinder body, and the piston rod passes through the first opening, second opening, third opening, fourth opening, and fifth opening of the cap assembly.
13. A vehicle, characterized in that, The device is equipped with a cap assembly as described in any one of claims 1-11, or with a shock absorber as described in claim 12.