Dustproof end cover for shock absorber and shock absorber
Patent Information
- Application Number
- CN202611351143.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-02
- Publication Date
- 2026-10-20
AI Technical Summary
但是，现有储油筒的端盖的油封，通常结构比较复杂，导致端盖的结构也比较复杂，制造工艺复杂，占用空间较大，生产成本高，噪音相对较大，安全性和可靠性低
[0016]根据本申请的用于减振器的防尘端盖，包括端盖本体、密封件及固定件。端盖本体上设置有用于减振器的活塞杆穿过的第一通孔，第一通孔靠近储油筒内的端面上设置有第一槽体，密封件上设置有用于活塞杆穿过的第二通孔，密封件与第一槽体的底壁抵接，固定件将密封件固定在第一槽体中。端盖本体上设置有排气孔，压缩缓冲块与端盖本体接触且被压缩生产高压气流能够直接通过排气孔排掉，降低了噪音。由此设置，本申请的用于减振器的防尘端盖，密封件与固定件采用分体式结构，结构简单，加工制造方便，占用空间小，操作方便，降低了生产成本，而且排气孔也便于高压气流直接排掉，大大降低了噪音，提高了减振器的安全性和可靠性。
Smart Images
Figure FT_1 
Figure FT_2 
Figure FT_3
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive vibration damping technology, specifically to a dustproof end cap for a vibration damper and a vibration damper. Background Technology
[0002] Shock absorbers are a crucial component of automotive suspension systems, such as those in the intelligent chassis of smart connected new energy vehicles. During vehicle operation, shock absorbers attenuate ground impact loads. Simultaneously, the suspension system typically uses the shock absorbers to limit the extension stroke during wheel drop or body bounce. An oil reservoir is located outside the shock absorber cylinder, and a guide that mates with the piston rod is located at the end of the cylinder. An end cap is located at the end of the oil reservoir near the guide. In harsh road conditions, such as those with heavy sand or dust, sand and gravel can easily penetrate the oil seal of the guide, leading to oil seal leakage and failure. Therefore, an oil seal is usually also installed on the end cap of the oil reservoir. However, existing oil seals on the end caps of oil reservoirs are typically complex in structure, resulting in a complex end cap structure, complex manufacturing process, large space occupation, high production cost, relatively high noise, and low safety and reliability. Summary of the Invention
[0003] The purpose of this application is to provide a dustproof end cap for a vibration damper and a vibration damper, which has a simple structure, is easy to manufacture, reduces production costs, reduces noise, and improves the safety and reliability of the vibration damper.
[0004] To solve at least one of the above-mentioned technical problems, this application adopts the following technical solution:
[0005] According to a first aspect of this application, a dustproof end cap for a shock absorber is provided, comprising: an end cap body disposed at the end of an oil reservoir of the shock absorber, the end cap body having a first through hole for a piston rod of the shock absorber to pass through, a first groove being disposed on the end face of the first through hole near the oil reservoir, the first groove being coaxial with the first through hole, and the diameter of the first groove being larger than the diameter of the first through hole; a sealing member abutting against the bottom wall of the first groove, the sealing member having a second through hole for the piston rod to pass through; a fixing member for fixing the sealing member in the first groove; and an exhaust hole being disposed on the end cap body, one end of the exhaust hole communicating with the first through hole and the other end communicating with the end cap body, the connection between the exhaust hole and the first through hole being located between the sealing member and the end of the first through hole away from the first groove.
[0006] In one possible implementation of the first aspect described above, the vent holes extend radially along the first through hole, and there are multiple vent holes that are evenly distributed circumferentially along the first through hole.
[0007] In one possible implementation of the first aspect described above, the fixing member is an annular pressure plate, the fixing member is disposed in the first groove, the fixing member is interference-fitted with the first groove, and the fixing member presses and fixes the sealing member in the first groove.
[0008] In one possible implementation of the first aspect described above, the seal is made of an elastic material and the fastener is made of a rigid material.
[0009] In one possible implementation of the first aspect described above, the seal includes: a sealing portion, a second through hole disposed on the sealing portion; and a fixing portion extending outward along the circumferential outer side of the sealing portion and abutting against the bottom wall of the first groove.
[0010] In one possible implementation of the first aspect described above, the fixing part is located at the end of the sealing part near the first groove, the outer diameter of the fixing part is smaller than the diameter of the first groove, the sealing part extends toward the end of the first through hole away from the first groove, and a buffer gap is formed between the inner wall of the first groove and the sealing part; the end of the first through hole near the first groove is tapered and its diameter gradually decreases from the bottom of the first groove to the end of the first through hole away from the first groove, the sealing part is tapered and sleeve-shaped, and the diameter of the sealing part gradually decreases from the end of the fixing part to the other end.
[0011] In one possible implementation of the first aspect described above, the end cap body is provided with a sleeve for fitting over the oil reservoir, and the end of the sleeve away from the end cap body is provided with a connecting flange that protrudes outward along its circumference.
[0012] In one possible implementation of the first aspect described above, an exhaust groove is provided at the end of the sleeve portion away from the end cap body. The exhaust groove extends radially through the sleeve portion, and a notch communicating with the exhaust groove is provided on the connecting flange.
[0013] In one possible implementation of the first aspect above, a noise reduction structure is provided on the end face of the end cap body away from the oil reservoir; the noise reduction structure includes a plurality of protrusions spaced apart, the plurality of protrusions being multiple groups arranged circumferentially along the first through hole, each protrusion being arc-shaped and coaxial with the first through hole, and each group of protrusions including a plurality of protrusions arranged radially spaced apart along the first through hole.
[0014] According to a second aspect of this application, a shock absorber is provided, including the dustproof end cap for the shock absorber described in the first aspect.
[0015] The above-mentioned technical solution of this application has at least one of the following beneficial effects:
[0016] The dustproof end cap for a vibration damper according to this application includes an end cap body, a sealing element, and a fixing element. The end cap body has a first through hole for the piston rod of the vibration damper to pass through. A first groove is provided on the end face of the first through hole near the oil reservoir. The sealing element has a second through hole for the piston rod to pass through. The sealing element abuts against the bottom wall of the first groove, and the fixing element secures the sealing element in the first groove. The end cap body has an exhaust port. The high-pressure airflow generated by the compression buffer block contacting the end cap body can be directly discharged through the exhaust port, reducing noise. Therefore, the dustproof end cap for a vibration damper of this application has a separate structure for the sealing element and the fixing element, which is simple in structure, easy to manufacture, occupies little space, is easy to operate, reduces production costs, and the exhaust port facilitates the direct discharge of high-pressure airflow, greatly reducing noise and improving the safety and reliability of the vibration damper.
[0017] In addition, unless otherwise specified in the technical solution of this application, the technical solution can be implemented by adopting conventional means in the field. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a half-sectional schematic diagram of a dustproof end cap for a shock absorber according to one embodiment of this application;
[0020] Figure 2 for Figure 1 Schematic diagram of the structure at point A;
[0021] Figure 3 This is a half-sectional view of a dustproof end cap for a vibration damper according to one embodiment of this application.
[0022] Figure 4 This is a partial structural schematic diagram of a vibration damper according to one embodiment of this application.
[0023] Explanation of the labels in the attached drawings:
[0024] Dustproof end cap 1000;
[0025] End cap body 1100; first through hole 1110; first groove 1120; vent 1130; noise reduction structure 1140; seal 1200; sealing part 1210; fixing part 1220; fixing part 1300; buffer gap 1400; sleeve part 1500; connecting flange 1600; notch 1610; vent groove 1700;
[0026] Oil storage tank 2000;
[0027] Piston rod 3000;
[0028] Guide 4000;
[0029] Cylinder 5000;
[0030] Compressed buffer block 6000;
[0031] Corrugated dust cover 7000. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only some, not all, of the embodiments of this application, and are used merely to explain this application and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "both ends," "both sides," "bottom," and "top," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," "upper-level," "lower-level," "main," and "secondary," etc., are used for descriptive purposes only and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.
[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral molding; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0035] See Figure 1 , Figure 2 , Figure 4 The diagram schematically illustrates a dustproof end cap 1000 for a shock absorber according to an embodiment of this application, comprising: an end cap body 1100, a sealing element 1200, and a fixing element 1300. The end cap body 1100 is disposed at the end of the oil reservoir 2000 of the shock absorber. The end cap body 1100 has a first through hole 1110 through which the piston rod 3000 of the shock absorber passes. A first groove 1120 is provided on the end face of the first through hole 1110 near the oil reservoir 2000. The first groove 1120 is coaxial with the first through hole 1110, and the diameter of the first groove 1120 is larger than the diameter of the first through hole 1110. The sealing element 1200 abuts against the bottom wall of the first groove 1120. The sealing element 1200 has a second through hole through which the piston rod 3000 passes. The fixing element 1300 is used to fix the sealing element 1200 in the first groove 1120. The end cap body 1100 is provided with an exhaust hole 1130. One end of the exhaust hole 1130 is connected to the first through hole 1110 and the other end is connected to the outside of the end cap body 1100. The connection between the exhaust hole 1130 and the first through hole 1110 is located between the sealing member 1200 and the end of the first through hole 1110 away from the first groove 1120.
[0036] It should be noted that, with Figure 4 For reference, the dustproof end cap 1000 is located at the top of the oil reservoir 2000, which is located outside the cylinder 5000. A guide 4000 is located at the top of the cylinder 5000. A corrugated dust cover 7000 is located outside the dustproof end cap 1000. A compression buffer block 6000 is located inside the corrugated dust cover 7000. The compression buffer block 6000 is located above the dustproof end cap 1000. The piston rod 3000 passes through the compression buffer block 6000, the seal 1200, and the guide 4000.
[0037] A step is formed at the intersection of the first groove 1120 and the first through hole 1110. The sealing element 1200 is placed in the first groove 1120 and abuts against the bottom wall of the first groove 1120. The fixing element 1300 presses and fixes the sealing element 1200 in the first groove 1120. It is easy to assemble, has a simple structure, occupies little space, and is easy to process and manufacture. The end cover body 1100 covers the end of the oil reservoir 2000. During the operation of the shock absorber, when the compression buffer block 6000 contacts the end cover body 1100 and is compressed, the high-pressure airflow generated can be directly discharged through the exhaust hole 1130 on the end cover body 1100.
[0038] Therefore, the dustproof end cover 1000, sealing element 1200 and fixing element 1300 of the shock absorber of this application adopt a split structure, which is simple and stable, easy to process and manufacture, occupies little space, is easy to operate, reduces production costs, has a good sealing effect, and the exhaust hole 1130 can also facilitate the direct discharge of high-pressure airflow, which greatly reduces noise and improves the safety, reliability and service life of the shock absorber, such as the intelligent chassis of intelligent connected new energy vehicles.
[0039] In some embodiments, reference Figure 2 , Figure 3 As shown, the vent holes 1130 extend radially along the first through hole 1110, and there are multiple vent holes 1130 evenly distributed circumferentially along the first through hole 1110. For example, the vent holes 1130 are circular holes, and there are three vent holes 1130 evenly distributed circumferentially along the first through hole 1110. This configuration results in a more stable structure and better venting performance.
[0040] In some embodiments, reference Figure 1 , Figure 2 As shown, the fixing member 1300 is an annular pressure plate, which is disposed in the first groove 1120. The fixing member 1300 and the first groove 1120 are interference-fitted, and the fixing member 1300 presses and fixes the sealing member 1200 in the first groove 1120. With this configuration, the structure is simpler, the assembly is more convenient and faster, and the production cost is further reduced.
[0041] In some embodiments, reference Figure 1 , Figure 2 As shown, the seal 1200 is made of an elastic material, and the fastener 1300 is made of a rigid material. For example, the seal 1200 can be made of rubber, and the fastener 1300 can be made of nylon. This design not only ensures sealing performance but also improves the overall structural strength and extends service life. Alternatively, the seal 1200 can also be made of other elastic materials, and the fastener 1300 can be made of metal or other rigid materials.
[0042] In some embodiments, reference Figure 1 , Figure 2 As shown, the seal 1200 includes a sealing portion 1210 and a fixing portion 1220. A second through hole is provided on the sealing portion 1210, and the fixing portion 1220 extends outward along the circumferential outer side of the sealing portion 1210 and abuts against the bottom wall of the first groove 1120. Both the fixing portion 1220 and the fixing member 1300 can be annular and coaxial. The fixing portion 1220 abuts against the bottom wall of the first groove 1120, and is pressed and fixed by the fixing member 1300, while the sealing portion 1210 ensures a tight seal with the piston rod 3000, preventing dust, mud, and other debris from entering the oil reservoir 2000. This design results in a more stable structure and higher safety and reliability.
[0043] Optionally, refer to Figure 1 , Figure 2 As shown, the fixing part 1220 is located at the end of the sealing part 1210 near the first groove 1120. The outer diameter of the fixing part 1220 is smaller than the diameter of the first groove 1120. The sealing part 1210 extends toward the end of the first through hole 1110 away from the first groove 1120. A buffer gap 1400 is formed between the inner wall of the first groove 1120 and the sealing part 1210. This arrangement not only provides a buffer zone for the elastic deformation of the sealing part 1210, but also allows the sealing element 1200 to self-adjust radially to compensate for machining errors, making it safer and more reliable.
[0044] Optionally, refer to Figure 1 , Figure 2 As shown, the first through hole 1110 is tapered at the end near the first groove 1120, and its diameter gradually decreases from the bottom of the first groove 1120 to the end of the first through hole 1110 away from the first groove 1120. The sealing part 1210 is a tapered sleeve, and its diameter gradually decreases from the end near the fixing part 1220 to the other end. This tapered structure not only provides guidance and facilitates assembly, but also prevents the outer side of the sealing part 1210 away from the fixing part 1220 from loosening, ensuring a tighter fit between the sealing part 1210 and the piston rod 3000, resulting in better sealing performance.
[0045] In some embodiments, reference Figure 1 , Figure 3 , Figure 4As shown, the end cap body 1100 is provided with a sleeve portion 1500 for fitting over the oil reservoir 2000. A connecting flange 1600 protruding outwards along its circumference is provided at the end of the sleeve portion 1500 away from the end cap body 1100. The end cap body 1100 and the sleeve portion 1500 can be integrally formed. A corrugated dust cover 7000 is provided outside the end cap body 1100 and the sleeve portion 1500. The connecting flange 1600 is connected to an annular groove inside the corrugated dust cover 7000. Reinforcing ribs can be provided at the connection point between the sleeve portion 1500 and the end cap body 1100. These reinforcing ribs can be one, two, or more arranged circumferentially along the sleeve portion 1500. This design results in a simple, stable structure that is easy to assemble.
[0046] Optionally, refer to Figure 1 , Figure 3 , Figure 4 As shown, an exhaust groove 1700 is also provided at the end of the sleeve portion 1500 away from the end cover body 1100. The exhaust groove 1700 extends radially through the sleeve portion 1500, and a notch 1610 communicating with the exhaust groove 1700 is provided on the connecting flange 1600. There can be one, two, or more exhaust grooves 1700, for example, multiple exhaust grooves 1700 are evenly distributed circumferentially along the sleeve portion 1500. When the corrugated dust cover 7000 is compressed, the airflow inside the corrugated dust cover 7000 can be quickly discharged through the exhaust groove 1700, thereby reducing noise, making it safer and more reliable, and improving the service life of the product.
[0047] In some embodiments, reference Figure 2 , Figure 3 , Figure 4 As shown, a noise reduction structure 1140 is provided on the end face of the end cap body 1100 away from the oil reservoir 2000. When the compression buffer block 6000 contacts the noise reduction structure 1140 on the end face of the end cap body 1100 and is elastically compressed to absorb energy, the noise reduction structure 1140 can avoid sliding friction, thereby reducing noise.
[0048] Optionally, refer to Figure 2 , Figure 3 As shown, the noise reduction structure 1140 includes a plurality of protrusions spaced apart. These protrusions are arranged in multiple groups along the circumference of the first through hole 1110. Each protrusion is arc-shaped and coaxial with the first through hole 1110. Each group of protrusions includes a plurality of protrusions arranged radially spaced apart along the first through hole 1110. This arrangement not only better avoids sliding friction and improves the noise reduction effect, but also enhances the structural strength of the end cap body 1100.
[0049] See Figure 4As shown, a vibration damper is also provided according to an embodiment of this application, including the dustproof end cover 1000 for vibration dampers described above. The vibration damper of this application may further include a piston rod 3000, an oil reservoir 2000, a cylinder 5000, a solenoid valve, a guide 4000, a buffer block, and a corrugated dust cover 7000, etc. These mechanisms can adopt corresponding mechanisms of existing vibration dampers, which will not be described in detail here.
[0050] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.
[0051] The above descriptions are merely some embodiments of this application, used only to illustrate the technical solutions of this application, and not to limit it. It should be understood that those skilled in the art can make improvements or substitutions based on the above descriptions without departing from the inventive concept of this application, and all such improvements and substitutions should fall within the protection scope of this application. In this case, all details can be replaced with equivalent elements, and materials, shapes, and sizes can also be arbitrary.
Claims
1. A dustproof end cap for a vibration damper, characterized in that, include: An end cap body is provided at the end of the oil reservoir of the shock absorber. The end cap body is provided with a first through hole for the piston rod of the shock absorber to pass through. A first groove is provided on the end face of the first through hole near the inside of the oil reservoir. The first groove is coaxial with the first through hole, and the diameter of the first groove is larger than the diameter of the first through hole. A sealing element abuts against the bottom wall of the first groove, and the sealing element is provided with a second through hole for the piston rod to pass through; A fastener is used to fix the seal in the first groove. The end cap body is provided with an exhaust hole. One end of the exhaust hole is connected to the first through hole and the other end is connected to the outside of the end cap body. The connection between the exhaust hole and the first through hole is located between the sealing element and the end of the first through hole away from the first groove.
2. The dustproof end cap for a vibration damper according to claim 1, characterized in that, The exhaust holes extend radially along the first through hole, and there are multiple exhaust holes that are evenly distributed circumferentially along the first through hole.
3. The dustproof end cap for a vibration damper according to claim 1, characterized in that, The fixing member is an annular pressure plate, which is disposed in the first groove. The fixing member is interference-fitted with the first groove and presses and fixes the sealing member in the first groove.
4. The dustproof end cap for a vibration damper according to claim 1, characterized in that, The sealing element is made of an elastic material, and the fixing element is made of a rigid material.
5. The dustproof end cap for a vibration damper according to claim 1, characterized in that, The sealing element includes: The sealing part, wherein the second through hole is provided on the sealing part; The fixing part extends outward along the circumferential outer side of the sealing part and abuts against the bottom wall of the first groove.
6. The dustproof end cap for a vibration damper according to claim 5, characterized in that, The fixing part is located at the end of the sealing part near the first groove body. The outer diameter of the fixing part is smaller than the diameter of the first groove body. The sealing part extends toward the end of the first through hole away from the first groove body. A buffer gap is formed between the inner wall of the first groove body and the sealing part. The first through hole is tapered at one end near the first groove, and its diameter gradually decreases from the bottom of the first groove towards the end of the first through hole away from the first groove. The sealing part is tapered and sleeve-shaped, and its diameter gradually decreases from one end near the fixing part towards the other end.
7. The dustproof end cap for a vibration damper according to claim 1, characterized in that, The end cap body is provided with a sleeve for fitting over the oil reservoir, and the end of the sleeve away from the end cap body is provided with a connecting flange that protrudes outward along its circumference.
8. The dustproof end cap for a vibration damper according to claim 7, characterized in that, The end of the sleeve portion away from the end cap body is also provided with an exhaust groove, which extends radially through the sleeve portion, and the connecting flange is provided with a notch communicating with the exhaust groove.
9. The dustproof end cap for a vibration damper according to claim 1, characterized in that, A noise reduction structure is provided on the end face of the end cap body away from the oil storage tank; The noise reduction structure includes a plurality of protrusions spaced apart. The plurality of protrusions are arranged in multiple groups along the circumference of the first through hole. Each protrusion is arc-shaped and coaxial with the first through hole. Each group of protrusions includes a plurality of protrusions arranged in a radially spaced manner along the first through hole.
10. A vibration damper, characterized in that, Includes the dustproof end cap for a shock absorber as described in any one of claims 1 to 9.