Vibration damper

Abstract

A vibration damper, comprising a spoke spring buffer (10), wherein the spoke spring buffer (10) comprises a center portion (11), a plurality of spoke springs (12) and an outer ring portion (13), the outer ring portion (13) coaxially surrounds the radial outer side of the center portion (11), the plurality of spoke springs (12) are respectively radially connected between the outer ring portion (13) and the center portion (11) and are circumferentially arranged at intervals, and the plurality of spoke springs (12) can elastically deform to allow the outer ring portion (13) to rotate relative to the center portion (11); and further comprising a cover plate (20), wherein the cover plate (20) is fixed on an axial side of the center portion (11), and can directly or indirectly abut against the outer ring portion (13) in a relative rotation manner, such that when the outer ring portion (13) rotates relative to the center portion (11), the cover plate (20) can be in direct or indirect frictional contact with the outer ring portion (13), thereby reducing the risk of deformation of the spoke spring buffer (10) toward an axial side.

Description

shock absorber Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a shock absorber for a transmission system of a motor vehicle. Background Art

[0002] In traditional fuel vehicles or hybrid vehicles, the crankshaft of the internal combustion engine is often affected by torque vibration. The torque vibration of the crankshaft can cause crankshaft damage and NVH (noise, vibration and harshness) problems. The current conventional solution to this problem is to install a rubber vibration damper (TVD). The TVD vibration damper mainly uses the friction generated by the rotation of the outer ring with a large moment of inertia relative to the rubber elastic element to consume the energy of torsional vibration, thereby reducing the torsional amplitude of the crankshaft and avoiding resonance within the commonly used speed range. However, due to the limitation of the installation space, this type of vibration damper often finds it difficult to provide sufficient attenuation of the crankshaft torsional vibration, and the rubber is prone to aging under the action of the heat generated by friction, thus affecting the service life.

[0003] CN 115182963 A proposes a novel spoke spring damper. This spoke spring damper comprises multiple spoke spring buffers with different radial dimensions, thereby providing multiple frequencies to dampen the torsional vibrations of the crankshaft. Because the spoke spring buffers have different shapes and sizes, this damper requires more complex processing and higher production costs. Furthermore, the damping provided by this damper depends solely on the shape of the spoke spring buffers and the friction between them. The finished damper cannot flexibly adjust the damping according to needs.

[0004] Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to provide an improved shock absorber.

[0006] The above technical problems are solved by a vibration damper according to the present invention. The vibration damper comprises a spoke spring buffer, comprising a central portion, a plurality of spoke springs, and an outer ring portion. The outer ring portion coaxially surrounds the central portion radially outwardly. The spoke springs are radially connected between the outer ring portion and the central portion and spaced circumferentially. The spoke springs are elastically deformable to allow the outer ring portion to rotate relative to the central portion. The vibration damper further comprises a cover plate fixed to an axial side of the central portion and rotatably abutting the outer ring portion directly or indirectly. When the outer ring portion rotates relative to the central portion, the cover plate directly or indirectly frictionally contacts the outer ring portion. When torque vibration occurs, the spoke springs elastically deform, causing the outer ring portion to rotate relative to the central portion to a certain extent, thereby damping the torque vibration. At this time, because the cover plate is fixed relative to the central portion, the outer ring portion also rotates relative to the cover plate, resulting in relative sliding between the cover plate and the outer ring portion, providing additional frictional damping for the vibration damper. In addition, the cover plate located on one axial side of the spoke spring buffer can also provide axial constraints for the outer ring portion, thereby prompting the spoke spring to elastically deform in a predetermined manner substantially in a plane perpendicular to the axial direction.

[0007] According to a preferred embodiment of the present invention, the shock absorber may further include a diaphragm spring, which abuts between the cover plate and the outer ring portion and rotatably abuts at least one of the cover plate and the outer ring portion. The cover plate thus indirectly abuts the outer ring portion via the diaphragm spring, and the elastically compressed diaphragm spring exerts a compressive force on the contact surface through its elastic force, thereby ensuring that sufficient friction is generated on the contact surface.

[0008] According to another preferred embodiment of the present invention, the diaphragm spring can be fixedly connected to one of the cover plate and the outer ring portion and can rotatably contact the other, thereby facilitating installation and positioning of the diaphragm spring in the shock absorber.

[0009] According to another preferred embodiment of the present invention, the diaphragm spring can be fixedly connected to the outer ring portion and contact the cover plate in a relatively rotatable manner. The fixed connection between the diaphragm spring and the outer ring portion is easy to achieve.

[0010] According to another preferred embodiment of the present invention, the shock absorber may further include a friction washer, through which the diaphragm spring indirectly contacts the cover plate. The friction washer may have excellent wear resistance, thereby providing sufficient friction while reducing wear on the cover plate and diaphragm spring, and also preventing noise generated by steel-on-steel friction.

[0011] According to another preferred embodiment of the present invention, the friction washer may include an axial section and a radial section. The axial section abuts the radial outer side of the cover plate, and the radial section extends radially inward from an axial end of the axial section and abuts the side of the cover plate facing the spoke spring buffer. The friction washer thus has an L-shaped cross-section and can be positioned on the outer periphery of the cover plate by form-fitting.

[0012] According to another preferred embodiment of the present invention, the shock absorber may further include one or more first fasteners, each of which axially passes through the cover plate and the center portion to secure the cover plate and the center portion together; and / or the shock absorber may further include one or more second fasteners, each of which axially passes through the diaphragm spring and the outer ring portion to secure the diaphragm spring and the outer ring portion together. Such fasteners may be bolts, screws, rivets, etc.

[0013] According to another preferred embodiment of the present invention, the cover plate can be made of an elastic material, so that the cover plate can compress the outer edge against the outer ring portion through elastic deformation. The cover plate can provide a pressing force on the contact surface through elastic deformation, thereby ensuring that sufficient friction can be generated between the contact surfaces.

[0014] According to another preferred embodiment of the present invention, the cover plate may include a radially inner portion, an arched portion, and an edge portion. The radially inner portion is fixed to the central portion, the edge portion coaxially surrounds the radially outer side of the radially inner portion, and the arched portion is connected between the radially inner portion and the edge portion and arches away from the spoke spring buffer so that the edge portion is pressed against the outer ring portion. The cover plate can be elastically deformed by the arched portion.

[0015] According to another preferred embodiment of the present invention, the cover plate may include one or more through-holes for draining contaminants. The windows may be formed on portions of the cover plate that do not contact the spoke spring buffers. Contaminants on the spoke spring buffers can be drained out of the shock absorber through the windows under the action of centrifugal force.

[0016] According to another preferred embodiment of the present invention, the vibration damper may include two cover plates, one located on either axial side of the spoke spring buffer and rotatably abutting the outer ring portion directly or indirectly. The two cover plates can apply pressure to the spoke spring buffer on both axial sides, thereby reducing the risk of the spoke spring buffer deforming toward one side in the axial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings. Elements with the same function are represented by the same reference numerals in the drawings.

[0018] FIG1 shows a perspective view of a shock absorber according to an exemplary embodiment of the present invention;

[0019] FIG2 shows a perspective view of the shock absorber shown in FIG1 ;

[0020] FIG3 shows a cross-sectional view of the shock absorber shown in FIG1 ;

[0021] FIG4 shows a perspective view of a shock absorber according to another exemplary embodiment of the present invention;

[0022] FIG5 shows a perspective view of a shock absorber according to yet another exemplary embodiment of the present invention; and

[0023] FIG. 6 shows a cross-sectional view of the vibration absorber shown in FIG. 5 . DETAILED DESCRIPTION

[0024] The following detailed description and accompanying drawings are used to illustrate the principles of the present invention. The present invention is not limited to the preferred embodiments described. The scope of protection of the present invention is defined by the claims.

[0025] According to an embodiment of the present invention, a vibration damper for a motor vehicle drivetrain is provided. This vibration damper is specifically designed to be mounted on a crankshaft of an internal combustion engine to dampen torsional vibrations of the crankshaft. This vibration damper utilizes spoke springs and additional friction damping to provide both damping and vibration reduction effects.

[0026] The specific structure of the shock absorber according to the present invention is described below with reference to the exemplary embodiments shown in Figures 1 to 3. Figures 1 and 2 are perspective views of a shock absorber according to an exemplary embodiment of the present invention, while Figure 3 is a cross-sectional view of the shock absorber taken along a section passing through the central axis.

[0027] As shown in Figure 1, the shock absorber is generally disc-shaped. As shown in Figure 3, the shock absorber of this embodiment mainly includes a spoke spring buffer 10, a cover plate 20, and a diaphragm spring 30. The three-dimensional view of Figure 2 removes the cover plate 20 in Figure 1 to more clearly illustrate the structure of the spoke spring buffer 10.

[0028] The spoke spring damper 10 can be an integral component or a multi-layer structure stacked and fixed together to form a unitary body. As shown in Figure 2, the spoke spring damper 10 includes a central portion 11, a plurality of spoke springs 12, and an outer ring portion 13. The spoke spring damper 10 has a central axis parallel to the longitudinal direction. The central portion 11 is a circular, plate-shaped component formed around the longitudinal central axis. The outer ring portion 13 coaxially surrounds the central portion 11 radially outward and is radially spaced from the central portion 11. Each spoke spring 12 extends substantially radially between the outer ring portion 13 and the central portion 11, thereby connecting the outer ring portion 13 and the central portion 11 as a single unit. The multiple spoke springs 12 of the spoke spring damper 10 are spaced apart circumferentially, preferably evenly distributed, and each spoke spring 12 preferably has substantially the same shape and size. The spoke spring damper 10 is torsionally connected to the internal combustion engine crankshaft, allowing it to rotate with the engine crankshaft about the central axis of the spoke spring damper 10. The spoke springs 12 of the spoke spring buffer 10 are made of an elastic material. Therefore, when torque vibration occurs on the spoke spring buffer 10, the spoke springs 12 can be elastically deformed, thereby allowing the outer ring portion 13 to rotate relative to the central portion 11 around the central axis within a certain range (depending on the torque size and the elastic deformation ability of the spoke springs 12), thereby buffering the torque vibration.

[0029] As shown in Figure 3, the shock absorber includes one or two cover plates 20. Each cover plate 20 is a generally disc-shaped component formed around a central axis. It is coaxially mounted on one axial side of the spoke spring damper 10 and fixed to the corresponding axial side of the central portion 11. The cover plate 20 and the central portion 11 can be fixedly connected, for example, using one or more first fasteners 50 (such as rivets, screws, or bolts). These first fasteners 50 can be spaced circumferentially, particularly evenly spaced. Each first fastener 50 axially passes through the cover plate 20 and the central portion 11, thereby securing the cover plate 20 and the central portion 11 together. When the shock absorber includes two cover plates 20, the two cover plates 20 are positioned on either axial side of the spoke spring damper 10, such that the spoke spring damper 10 is axially positioned between the two cover plates 20. In this case, each first fastener 50 can axially pass through both cover plates 20 and the central portion 11 simultaneously. Each cover plate 20 is axially spaced apart from the spoke spring 12 and the outer ring portion 13 of the spoke spring buffer 10 . When the outer ring portion 13 rotates relative to the central portion 11 , it also rotates synchronously relative to each cover plate 20 .

[0030] Accordingly, the shock absorber includes one or two diaphragm springs 30. In a single shock absorber, the number of diaphragm springs 30 is the same as the number of cover plates 20, with each diaphragm spring 30 corresponding to a corresponding cover plate 20. Each diaphragm spring 30 is also a generally annular member formed around a central axis and is arranged substantially coaxially with the spoke spring buffer 10 and the cover plate 20. Each diaphragm spring 30 abuts axially between the corresponding cover plate 20 and the outer ring portion 13 in a pre-compressed state, thereby axially compressing the mutually facing axial side surfaces of the cover plate 20 and the outer ring portion 13.

[0031] Each diaphragm spring 30 abuts at least one of the cover plate 20 and the outer ring portion 13 in a relatively rotatable manner, that is, it is in non-fixed contact with the at least one component. Therefore, when the outer ring portion 13 of the spoke spring buffer 10 rotates or tends to rotate relative to the center portion 11, the diaphragm spring 30 can slidably rotate or tend to rotate relative to the non-fixed contact components of the cover plate 20 and the outer ring portion 13 (i.e., frictional contact), thereby generating frictional forces on the corresponding contact surfaces that resist rotation and provide additional frictional damping for the shock absorber.

[0032] Preferably, the diaphragm spring 30 is fixedly connected to one of the cover plate 20 and the outer ring portion 13 and rotatably contacts the other. In particular, the diaphragm spring 30 is preferably fixedly connected to the outer ring portion 13 and rotatably contacts the cover plate 20. Therefore, the diaphragm spring 30 is positioned during installation by its fixed connection to the outer ring portion 13. In this case, the shock absorber may further include one or more second fasteners 60, such as rivets, screws, or bolts, for securing the diaphragm spring 30 to the outer ring portion 13. These second fasteners 60 may be spaced circumferentially, particularly evenly spaced. Each second fastener 60 may axially penetrate the diaphragm spring 30 and the outer ring portion 13, thereby securing the diaphragm spring 30 and the outer ring portion 13 together. If there are two diaphragm springs 30, one located axially on either side of the outer ring portion 13, each second fastener 60 may axially penetrate both diaphragm springs 30 and the outer ring portion 13. Alternatively, the diaphragm spring 30 may also be fixedly connected to the cover plate 20 and contact the outer ring portion 13 in a relatively rotatable manner.

[0033] The rotatable contact between the diaphragm spring 30 and the cover plate 20 and / or the outer ring portion 13 can be direct or indirect. Preferably, the shock absorber can include friction washers 40. Each friction washers 40 is also a generally annular member formed around the central axis and extends substantially in a plane perpendicular to the central axis. Each friction washers 40 is also arranged substantially coaxially with the spoke spring buffer 10, the cover plate 20, and the diaphragm spring 30, and is clamped between the corresponding diaphragm spring 30 and the corresponding friction contact surface. For example, as shown in FIG3 , when the diaphragm spring 30 is fixedly connected to the outer ring portion 13 and rotatably contacts the cover plate 20, each diaphragm spring 30 indirectly contacts the corresponding cover plate 20 via the corresponding friction washers 40.

[0034] As shown in the enlarged view on the right side of FIG. 3 , the friction pad 40 preferably has an L-shaped cross-section taken along the central axis. Specifically, the friction pad 40 includes an axial section 41 and a radial section 42. The axial section 41 is a cylindrical portion extending generally axially and abuts against the radially outer side of the cover plate 20. The radial section 42 is a circular, plate-like portion extending generally radially. It extends radially inward from the axial end of the axial section 41 facing the spoke spring damper 10 and abuts against the side of the cover plate 20 facing the spoke spring damper 10. This friction pad 40 can be positioned relative to the cover plate 20 in a plane perpendicular to the central axis through form-fitting.

[0035] As shown in FIG3 , each cover plate 20 may preferably include a radially outer portion 21 and a radially inner portion 22. Both the radially outer portion 21 and the radially inner portion 22 are annular portions formed around a central axis. The radially outer portion 21 is coaxially located radially outward of the radially inner portion 22. The radially outer portion 21 is axially offset relative to the radially inner portion 22, such that the radially outer portion 21 is axially spaced from the spoke spring damper 10 and the radially inner portion 22 axially abuts the center portion 11. This allows the diaphragm spring 30 to be mounted between the radially outer portion 21 and the outer ring 13, and the cover plate 20 to be fixedly connected to the center portion 11 of the spoke spring damper 10 via the radially inner portion 22 (in this case, the first fastener 50 is mounted on the radially inner portion 22). The friction pad 40 (if present) may be positioned at the radially outer edge of the radially outer portion 21.

[0036] In addition, each cover plate 20 may further include a transition portion 23 radially located between the radially outer portion 21 and the radially inner portion 22. The radially outer portion 21 and the radially inner portion 22 may each extend in a plane substantially perpendicular to the central axis, while the transition portion 23 may extend obliquely relative to the radially outer portion 21 and the radially inner portion 22, thereby connecting the two portions offset from each other.

[0037] Preferably, the outer diameter of the radially outer portion 21 may be smaller than the outer diameter of the outer ring portion 13, and the area of ​​the diaphragm spring 30 abutting the radially outer portion 21 is located radially inside the area of ​​the diaphragm spring 30 abutting the outer ring portion 13. This facilitates installation of the diaphragm spring 30.

[0038] In embodiments according to the present invention, the shock absorber may be provided with a cover plate 20 and corresponding diaphragm spring 30 on only one axial side, or with a cover plate 20 and corresponding diaphragm spring 30 on both axial sides. However, providing two cover plates 20 and corresponding diaphragm springs 30 on either axial side of the spoke spring damper 10 is preferred. This is because the two diaphragm springs 30 in this arrangement can apply elastic forces in opposite directions on the axial sides of the spoke spring damper 10, resulting in a relatively balanced axial stress state on the spoke spring damper 10, thereby reducing the risk of axial deformation of the spoke spring damper 10. In particular, this prevents the outer ring portion 13 of the spoke spring damper 10 from plastically deforming in the axial direction, thereby preventing the pre-compression of the diaphragm spring 30 from being lost. For similar reasons, the two cover plates 20 preferably have the same shape and size and are symmetrically arranged with respect to the spoke spring damper 10. The two diaphragm springs 30 also preferably have the same shape and size and are symmetrically arranged with respect to the spoke spring damper 10.

[0039] FIG4 illustrates a modified embodiment based on the embodiment shown in FIG1 through FIG3 . The vibration absorber shown in FIG4 differs from the vibration absorber shown in FIG1 through FIG3 in that the cover plate 20 includes one or more window holes 24. Each window hole 24 axially penetrates the cover plate 20, allowing contaminants within the vibration absorber to be discharged through the window hole 24 under the action of centrifugal force. The window hole 24 is formed in a portion of the cover plate 20 that does not contact the spoke spring buffer 10, such as the transition portion 23. When multiple window holes 24 are present, they are preferably spaced apart, and in particular, evenly distributed, along the circumference.

[0040] In the embodiments shown in Figures 1 to 3 or the improved embodiment shown in Figure 4, indirect frictional contact is achieved between the cover plate 20 and the outer ring portion 13 via the diaphragm spring 30, and the required pressing force of the contact surface is provided by the elastic compression of the diaphragm spring 30. Alternatively, the pressing force required to generate friction between the cover plate 20 and the outer ring portion 13 can also be achieved through other means. In the alternative embodiment shown in Figures 5 and 6, the diaphragm spring 30 is not provided between the cover plate 20 and the outer ring portion 13. The cover plate 20 is made of an elastic material. Therefore, the cover plate 20 itself can elastically deform, thereby pressing its outer edge against the outer ring portion 13. The elastic material used to manufacture such a cover plate 20 should be a material that has both strength and elasticity, preferably spring steel.

[0041] Preferably, the cover plate 20 can utilize an arched structure to enhance its elastic deformation capability, thereby ensuring sufficient compressive force on the outer edge. Specifically, as shown in FIG6 , the cover plate 20 can include a coaxially arranged radially inner portion 22, an arched portion 25, and an edge portion 26. The radially inner portion 22 has substantially the same structure as the radially inner portion 22 in the embodiment shown in FIG1 through FIG3 , and also abuts and is fixed to the center portion 11. The annular edge portion 26, serving as the outer edge of the cover plate 20, coaxially surrounds the radially outer side of the radially inner portion 22 and is radially spaced apart from the radially inner portion 22. The arched portion 25 is also an annular portion surrounding the central axis and connects the radially inner portion 22 and the edge portion 26. The edge portion 26 abuts the outer ring portion 13 directly or indirectly (e.g., via a friction pad) in a relatively rotatable manner. The arched portion 25 arches generally axially away from the spoke spring damper 10, thereby avoiding contact with the spoke spring damper 10. When the cover plate 20 and the spoke spring buffer 10 are installed together, the arched portion 25 elastically deforms in a direction away from the spoke spring buffer 10, thereby generating an elastic force that presses the edge portion 26 against the outer ring portion 13. The structure of the cover plate 20 of the embodiment shown in Figures 5 and 6 generally corresponds to the structure formed by integrating the cover plate and diaphragm spring of the embodiment shown in Figures 1 to 3. Therefore, except for the differences explicitly described above, the remaining structural features of the two embodiments are basically the same and will not be repeated here.

[0042] The shock absorber according to the present invention utilizes a cover plate to provide additional damping for the spoke spring buffer. Furthermore, the cover plate constrains the axial position of the spoke spring buffer's outer ring, thereby reducing the risk of axial deformation. This shock absorber boasts a simple structure and is easy to manufacture and install, effectively reducing production costs and conserving installation space. Furthermore, after the finished shock absorber leaves the factory, friction can be easily adjusted by varying the diaphragm spring's elastic force or assembly height to achieve the desired damping effect.

[0043] While the foregoing descriptions illustrate possible embodiments, it should be understood that numerous variations exist through combinations of all known and other technical features and implementations readily conceivable to a skilled artisan. Furthermore, it should be understood that the exemplary embodiments serve merely as examples and in no way limit the scope, application, or configuration of the present invention. The foregoing descriptions are intended primarily to provide a skilled artisan with technical guidance for implementing at least one exemplary embodiment. Various modifications, particularly regarding the functionality and structure of the components described, may be made without departing from the scope of the claims.

[0044] REFERENCE NUMERALS 10 Spoke spring buffer 11 Center portion 12 Spoke spring 13 Outer ring portion 20 Cover plate 21 Radially outer portion 22 Radially inner portion 23 Transition portion 24 Window hole 25 Arched portion 26 Edge portion 30 Diaphragm spring 40 Friction pad 41 Axial section 42 Radial section 50 First fastener 60 Second fastener

Claims

1. A shock absorber, comprising a spoke spring buffer (10), the spoke spring buffer (10) comprising a central portion (11), a plurality of spoke springs (12) and an outer ring portion (13), the outer ring portion (13) coaxially surrounding the radial outer side of the central portion (11), the plurality of spoke springs (12) respectively connected radially between the outer ring portion (13) and the central portion (11) and distributed at intervals in the circumferential direction, the plurality of spoke springs (12) being elastically deformable so as to allow the outer ring portion (13) to rotate relative to the central portion (11), It is characterized in that The shock absorber further comprises a cover plate (20), which is fixed to an axial side of the central portion (11) and directly or indirectly abuts against the outer ring portion (13) in a relatively rotatable manner, so that when the outer ring portion (13) rotates relative to the central portion (11), the cover plate (20) can directly or indirectly come into frictional contact with the outer ring portion (13).

2. The shock absorber according to claim 1, characterized in that: The shock absorber further comprises a diaphragm spring (30), wherein the diaphragm spring (30) abuts between the cover plate (20) and the outer ring portion (13), and abuts against at least one of the cover plate (20) and the outer ring portion (13) in a relatively rotatable manner.

3. The shock absorber according to claim 2, characterized in that: The diaphragm spring (30) is fixedly connected to one of the cover plate (20) and the outer ring portion (13) and contacts the other in a relatively rotatable manner.

4. The shock absorber according to claim 3, characterized in that The diaphragm spring (30) is fixedly connected to the outer ring portion (13) and contacts the cover plate (20) in a relatively rotatable manner.

5. The shock absorber according to claim 4, characterized in that The shock absorber further comprises a friction washer (40), and the diaphragm spring (30) indirectly contacts the cover plate (20) via the friction washer (40).

6. The shock absorber according to claim 5, characterized in that The friction pad (40) comprises an axial section (41) and a radial section (42), wherein the axial section (41) abuts against the radial outer side of the cover plate (20), and the radial section (42) extends radially inward from the axial end of the axial section (41) and abuts against the side of the cover plate (20) facing the spoke spring buffer (10).

7. The vibration absorber according to claim 4, characterized in that: The vibration absorber further comprises one or more first fasteners (50), each first fastener (50) passing through the cover plate (20) and the central portion (11) in the axial direction so as to fix the cover plate (20) and the central portion (11) together; and / or The shock absorber further comprises one or more second fasteners (60), each of which passes through the diaphragm spring (30) and the outer ring portion (13) in the axial direction so as to fix the diaphragm spring (30) and the outer ring portion (13) together.

8. The shock absorber according to claim 1, characterized in that The cover plate (20) is made of an elastic material, so that the cover plate (20) presses the outer edge onto the outer ring portion (13) through elastic deformation.

9. The vibration absorber according to claim 8, characterized in that The cover plate (20) comprises a radial inner portion (22), an arched portion (25) and an edge portion (26), wherein the radial inner portion (22) is fixed to the central portion (11), the edge portion (26) coaxially surrounds the radial outer side of the radial inner portion (22), and the arched portion (25) is connected between the radial inner portion (22) and the edge portion (26) and arches away from the spoke spring buffer (10), so that the edge portion (26) is pressed against the outer ring portion (13).

10. The vibration absorber according to claim 1, characterized in that The cover plate (20) includes one or more through-going window holes (24) to discharge pollutants.

11. The vibration absorber according to any one of claims 1 to 10, characterized in that The shock absorber comprises two cover plates (20), the two cover plates (20) are respectively located on two axial sides of the spoke spring buffer (10) and are respectively directly or indirectly abutted against the outer ring portion (13) in a relatively rotatable manner.

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