Steering wheel vibration reduction system and steering wheel

Abstract

The present invention relates to a steering wheel and a steering wheel vibration reduction system, which includes an airbag module and a click device, wherein the airbag module includes a first shell component, and the click device includes a second shell component and a click spring, wherein the second shell component is configured to be fixedly mounted to a steering wheel body. The steering wheel vibration reduction system includes an elastomer and a protective component mounted to the second shell component, wherein the elastomer is configured to transmit the vibration of the steering wheel body to the airbag module. The elastomer has at least one weakening portion for weakening the stiffness of the elastomer, and the weakening portion is configured to reduce the natural frequency of the steering wheel vibration reduction system. The steering wheel vibration reduction system has a compensation convex block, which is configured to compensate for the outer contour size of the airbag module. The steering wheel vibration reduction system can be improved in reducing the natural vibration frequency while ensuring that the airbag and the click device function well.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and more particularly to a steering wheel vibration reduction system and a steering wheel having the steering wheel vibration reduction system. Background Art

[0002] Steering wheels are widely used in modern vehicles to provide steering functions. Typically, the steering wheel may include an airbag module and a horn for the vehicle, which may be mounted in the center of the steering wheel. The vehicle may generate vibrations while driving, for example, due to various factors such as idling of the vehicle's engine, uneven road surface, and deformation of the vehicle's tires. The vibrations of the vehicle may be transmitted to the steering wheel. The vibrations on the steering wheel may affect the comfort of the driver of the vehicle.

[0003] Some steering wheel vibration reduction systems are known in the prior art, which include an elastomer as a spring element and an airbag module as a vibration mass block, wherein the elastomer is configured to transmit the vibration of the steering wheel body to the airbag module. When the vibration of the vehicle is transmitted to the steering wheel body, the steering wheel vibration reduction system including the elastomer and the vibration mass block can partially absorb the vibration of the steering wheel body and improve the comfort of the driver holding the steering wheel rim. For relevant prior art, reference can be made to CN103140387B, CN105667443B, CN209921405U and CN110962911A, for example. Summary of the invention

[0004] The inventors of the present application have discovered in their research on steering wheel vibration damping systems that: known steering wheel vibration damping systems are difficult to meet the expectations of some users for reducing the vibration damping frequency; the airbag module may deviate from the predetermined outer contour dimensions relative to the steering wheel body, such as collapsing relative to the steering wheel body, which is related to the deformation of the elastomer under the action of gravity, especially when the elastomer is weakened in order to reduce the frequency of the steering wheel vibration damping system; known steering wheel vibration damping systems have a complex structure and are not easy to assemble.

[0005] Therefore, the object of the present invention is to provide a steering wheel vibration damping system and a steering wheel having such a steering wheel vibration damping system, wherein the steering wheel vibration damping system is improved in reducing the natural vibration frequency, while the airbag module can maintain a predetermined outer contour size relative to the steering wheel body.

[0006] According to a first aspect of the present invention, a steering wheel vibration damping system is proposed, which includes an airbag module for a steering wheel and a click device for a vehicle horn, the airbag module including a first housing component, the click device second housing component and a click spring separating the first housing component and the second housing component from each other, the second housing component being configured to be fixedly mounted to a steering wheel body, the steering wheel vibration damping system including an elastomer mounted to the second housing component and a protective component for protecting the elastomer, the elastomer being configured to transmit vibrations of the steering wheel body to the airbag module and the first housing component as mass blocks, the elastomer having at least one weakening portion for weakening the stiffness of the elastomer, the weakening portion being configured to reduce the natural frequency of the steering wheel vibration damping system, and the steering wheel vibration damping system having a compensation cam, the compensation cam being configured to compensate for the outer contour size of the airbag module.

[0007] The steering wheel vibration reduction system according to the present invention can well meet the expectations of some users for the reduction of low-frequency vibrations, improve the comfort of the driver, is easy to install, and can ensure the functions of the airbag module and the clicking device.

[0008] In the present invention, the weakened portion can be used to adjust the natural vibration frequency of the steering wheel vibration damping system in the low-frequency direction, and the compensation convex block can be used to compensate the outer contour size of the airbag module, while other parts of the steering wheel vibration damping system can remain basically unchanged. This can be advantageous in terms of manufacturing and installation of the steering wheel vibration damping system.

[0009] In some embodiments, the elastic body may be configured as a column. The elastic body may have a circular cross section or a non-circular cross section. The cross section of the elastic body may remain unchanged or change in the axial direction.

[0010] In some embodiments, the elastic body may be configured in a hollow cylindrical shape, and the elastic body may have a central hole.

[0011] In some embodiments, the protection component may be configured as a protection bushing, and the protection bushing may have a hollow cylindrical portion inserted into a central hole of the elastomer.

[0012] In some embodiments, the protective bushing may provide protection for the axial end surface and / or the center hole of the upper portion of the elastomer.

[0013] In some embodiments, the steering wheel damping system may include a connection device, which may define a maximum separation position of the first housing component relative to the second housing component under the force of the click spring.

[0014] In some embodiments, the connection device can pass through the central hole of the elastomer, the hollow cylindrical part of the protective bushing and the click spring. A particularly compact design can thus be achieved, wherein the elastomer, the protective bushing and the click spring can be arranged essentially coaxially. The elastomer, the protective bushing and the click spring can fit into a common receiving hole of the second housing part without the need for separate receiving holes on the second housing part for the elastomer and the protective bushing on the one hand and for the click spring on the other hand.

[0015] In some embodiments, the connection device may be a bolt connection device or a riveted connection device. In some embodiments, the connection device may also be a non-detachable connection structure.

[0016] In some embodiments, the bolt connection device may include a step nut and a bolt screwed into the step nut, the step nut being fastened to the first shell component by the bolt, and the step of the step nut can be stopped against at least one of the second shell component, the elastomer and the protective bushing at the maximum separation position, for example, only against the elastomer, or only against the protective bushing, or against the second shell component and the protective bushing.

[0017] In some embodiments, the weakened portion may include at least one groove extending in the inner circumference of the elastomer. The groove may extend over the entire axial length of the center hole of the elastomer, or only over a portion of the axial length. The groove may extend in the axial direction of the elastomer, or may extend in a direction deviating from the axial direction, for example, in a spiral shape. The groove may extend continuously or intermittently. In principle, the groove may have any cross-sectional shape, for example, a roughly semicircular, roughly rectangular or roughly triangular cross-sectional shape. The cross-sectional shape of the groove may remain unchanged or change along the extension direction of the groove.

[0018] As an alternative or supplement to the above groove, the weakened portion may include at least one groove extending in the outer peripheral surface of the elastomer; and / or at least one hole extending in the base of the elastomer. The hole may be a through hole or a blind hole.

[0019] In some embodiments, the weakened portion may include at least one groove extending in the axial direction in the inner circumferential surface of the elastic body.

[0020] In some embodiments, the weakened portion may include at least two groups of grooves extending in the axial direction in the inner circumferential surface of the elastic body, the grooves of each group are arranged adjacent to each other in the circumferential direction of the elastic body, and the groups are distributed in the circumferential direction of the elastic body. For example, the weakened portion may include two groups of grooves extending in the axial direction in the inner circumferential surface of the elastic body, the grooves of each group are arranged adjacent to each other in the circumferential direction of the elastic body, and the two groups are arranged opposite to each other.

[0021] In some embodiments, the natural vibration frequency of the steering wheel damping system can be influenced by at least one of the following parameters: the number of grooves, the extension direction of the grooves, the cross-sectional shape of the grooves, the depth and width of the grooves, and the extension length.

[0022] In some embodiments, the compensation amount of the compensation bump may be affected by at least one of the following parameters: the shape and area of ​​the compensation bump, the height of the compensation bump, and the position of the compensation bump.

[0023] In some embodiments, the compensation convex block may be disposed on at least one of the protective component, the elastic body, and the second housing component. For example, the compensation convex block may be disposed only on the protective component, or may be disposed only on the second housing component, or may be disposed not only on the protective component but also on the second housing component.

[0024] In some embodiments, the compensation protrusion may be disposed at a six o'clock position on a surface of the protection component facing the elastic body, and the compensation protrusion forms a surface contact with the elastic body.

[0025] In some embodiments, the compensation bump may be a planar bump.

[0026] In some embodiments, the protective component may have arcuate protrusions arranged at the three o'clock and nine o'clock positions on the surface of the protective component facing the elastomer, the arcuate protrusions form a line contact with the elastomer, and the contact line forms a pivot axis of the protective component relative to the elastomer.

[0027] In some alternative embodiments, the protective component may have a compensation protrusion disposed at the six o'clock position, and the elastic body may have arc-surface protrusions disposed at the three o'clock and nine o'clock positions.

[0028] In some embodiments, the second housing component may have a receiving hole for receiving the elastic body and the protective component, and the elastic body, the protective component and the receiving hole are non-rotatable relative to each other in the axial direction.

[0029] In some embodiments, the elastic body may have a pin-shaped element that can be inserted into a positioning hole of the second housing component that is adjacent to the receiving hole.

[0030] In some embodiments, the elastic body may have a protrusion, and the protective component may have a notch, and the protrusion can be received in the notch.

[0031] In some embodiments, the receiving hole may have an inner circumferential surface, a radially outward extending step surface at the top, and a radially inward extending step surface at the bottom, and the elastomer can be installed into the receiving hole from the side of the second shell component facing the first shell component, and the elastomer has an outer circumferential surface opposite to the inner circumferential surface of the receiving hole and an upper flange, the bottom area of ​​the elastomer is supported on the step surface at the bottom of the receiving hole, and the flange of the elastomer is supported on the step surface at the top of the receiving hole.

[0032] In some embodiments, the receiving hole may have an inner circumferential surface, a radially inwardly extending step surface at the top, and a radially outwardly extending step surface at the bottom, and the elastomer can be installed in the receiving hole from the side of the second shell component facing away from the first shell component, and the elastomer has an outer circumferential surface opposite to the inner circumferential surface of the receiving hole and a lower flange, the upper region of the elastomer is supported on the upper step surface of the receiving hole, and the flange of the elastomer is supported on the step surface at the bottom of the receiving hole.

[0033] In some embodiments, the second housing part can be configured in a U-shape and can have three receiving holes, one of which is arranged at the bottom of the U-shape, and the other two are arranged in the free end regions of the U-shape, each receiving hole being provided with the elastic body and the protective component and the click spring. Generally speaking, there can be a single combination or a plurality of combinations, which can include the receiving holes of the second housing part, the elastic body, the protective component and the click spring, which can be provided with connection devices, in particular screw connection devices, for example.

[0034] In some embodiments, the click device may include a click lower plate, and the click lower plate may have a limiting element, and the limiting element is configured to limit the maximum movement of the protective component and the elastic body. The limiting element can prevent the elastic body and the protective component from moving too much. Such excessive movement may shorten the life of the elastic body, and may even cause the elastic body and the protective component to be out of the installation position.

[0035] In some embodiments, the stiffness of the elastomer may be significantly smaller than the stiffness of the click spring, for example, at least 2 times, preferably at least 3 times, such as at least 4 times smaller than the stiffness of the click spring.

[0036] According to a second aspect of the present invention, a steering wheel is proposed, which comprises a steering wheel body, in which a steering wheel vibration damping system according to the first aspect of the present invention is arranged. The steering wheel has the technical advantages associated with the above-mentioned steering wheel vibration damping system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be described in more detail below with reference to the accompanying drawings with the aid of specific embodiments.

[0038] Figure 1 is a top view of a steering wheel having a steering wheel vibration damping system according to an embodiment of the present invention;

[0039] Figure 2 yes Figure 1 A cross-sectional view of a half of the steering wheel damping system along section line AA;

[0040] Figure 3 yes Figure 1 A perspective view of a structural assembly of a steering wheel vibration reduction system;

[0041] Figure 4 yes Figure 1 A partial cross-sectional view of a steering wheel vibration reduction system;

[0042] Figure 5 yes Figure 1 A perspective view of an elastic body of a steering wheel vibration reduction system;

[0043] Figure 6 yes Figure 1 A perspective view of a protective bushing of a steering wheel vibration reduction system;

[0044] Figure 7 is a partial cross-sectional view of a steering wheel vibration reduction system according to another embodiment;

[0045] 8A and 8B are perspective views of elastomers according to further embodiments. DETAILED DESCRIPTION

[0046] Figure 1 is a top view of a steering wheel having a steering wheel vibration damping system according to one embodiment, and Figure 2 yes Figure 1A cross-sectional view of a half of a steering wheel damping system along section line AA. The steering wheel may have a steering wheel body 1, which may have a metal frame, which may be wrapped with a flexible material. An airbag module 2 may be arranged in the center of the steering wheel body 1. A sounding device for a vehicle horn may be arranged below the airbag module 2. Typically, the airbag module 2 may include an airbag door cover 3, a first shell component 5 connected to the airbag door cover 3, and the airbag door cover 3 and the first shell component 5 may constitute a shell of the airbag module, and the shell has a accommodating chamber for accommodating a folded airbag 4. Typically, the inflator 7 is arranged in the center of the bottom of the shell of the airbag module, and can quickly inflate the folded airbag 4 when triggered, and the inflated airbag then pops out from the airbag door cover 3 to provide safety protection for the vehicle occupants. Typically, the inflator 7 may be a pyrotechnic gas generator.

[0047] In the embodiment shown, the first housing part 5 can be regarded as a common part of the airbag module 2 and the trigger device, wherein the trigger contacts of the trigger device can be arranged on the first housing part. In some embodiments not shown, the airbag module 2 and the trigger device can each have their own housing parts, which can be fixedly connected to each other, and the trigger contacts are arranged on the own housing parts of the trigger device.

[0048] Figure 3 yes Figure 1 A perspective view of a structural assembly of a steering wheel vibration reduction system, the structural assembly includes a second housing component 6, the second housing component is configured to be generally U-shaped and may have a plurality of (in Figure 3 There are three receiving holes 13, each of which can accommodate an elastomer 10 and a protective component 12, as will be described in more detail later.

[0049] Figure 4 yes Figure 1 A partial cross-sectional view of a steering wheel damping system is shown, in which the structure associated with a central receiving hole 13 is described. Figure 5 and Figure 6 The elastic body 10 and the protective component 12 arranged in the central receiving hole are described separately. The situation can be the same or similar for the other two receiving holes 13 arranged at the end sides and the elastic bodies 10 and protective components 12 accommodated therein.

[0050] Typically, the pressing device may include a pressing upper plate and a pressing lower plate 9. The pressing upper plate may be integrated into the first housing component 5, or may be connected to the first housing component 5 as a separate component. The pressing upper plate may have a pressing contact. The pressing lower plate 9 may be mounted to the second housing component 6, and may have a pressing wire 9a. The pressing lower plate 9 may also be integrated into the second housing component 6. The pressing device may include a pressing spring 11 that separates the pressing upper plate and the pressing lower plate, or that separates the first and second housing components 5 and 6. When the airbag module 2 is pressed, the first housing component 5 may overcome the spring force of the pressing spring 11 and move toward the second housing component 6, so that the pressing contact that moves with the first housing component and the pressing wire 9a that is fixed to the second housing component 6 are in contact and connected, so that the vehicle horn can be pressed. When the pressure on the airbag module 2 is released, the first housing component 5 can be separated from the second housing component 6 under the action of the spring force of the click spring 11, so that the click contact and the click wire 9a are separated, and the vehicle horn can stop sounding.

[0051] like Figure 4 As shown, the receiving hole 13 may have an inner peripheral surface 6a, an upper stepped surface 6b extending radially outward, and a bottom stepped surface 6c extending radially inward.

[0052] like Figure 4 and Figure 5 As shown, the elastomer 10 can be constructed into a hollow cylinder, especially a hollow cylindrical shape. The elastomer 10 can have an inner peripheral surface 10a defining a central hole, an outer peripheral surface 10b opposite to the inner peripheral surface of the receiving hole, and a flange 10c on the upper portion. The bottom area 10d of the elastomer 10 can be supported on the step surface 6c. The flange 10c of the elastomer 10 can be supported on the step surface 6b. More specifically, the flange 10c of the elastomer 10 can have a first surface facing away from the receiving hole 13 and a second surface facing the receiving hole 13, and the second surface can be placed on the step surface 6b.

[0053] The elastic body 10 can be received in the receiving hole 13 without relative rotation. For this purpose, for example, the elastic body 10 can have a pin-shaped element 10f, which can be inserted into the positioning hole 6d of the second housing part 6 adjacent to the receiving hole 13. As an alternative, it is also possible that the elastic body 10 and the receiving hole 13 can have a non-circular cross section, for example, a substantially rectangular cross section.

[0054] The elastic body 10 may have at least one weakened portion 10g in its inner circumferential surface 10a, for example, two weakened portions facing each other, such as Figure 5As shown. The weakened portion can extend axially. The weakened portion can have any cross section, for example, its cross-sectional shape can be a circular ring segment, a roughly rectangular shape, a roughly triangular shape or a similar shape. The weakened portion can weaken the stiffness of the elastic body and reduce the natural vibration frequency of the steering wheel vibration reduction system.

[0055] like Figure 4 and Figure 6 As shown, the protective component 12 can be configured as a protective sleeve. The protective sleeve can have a hollow cylindrical portion 12a and a flange 12b. The hollow cylindrical portion can be inserted into the central hole of the elastomer 10. The flange 12b can be placed on the axial end surface of the upper part of the elastomer 10. The surface of the flange 12b facing away from the elastomer can support the click spring 11. The protective component 12 can be arranged with the elastomer 10 without relative rotation. For example, the elastomer 10 can have a protrusion 10e, and the protective component 12 can have a notch 12c, in which the protrusion is received. It is also possible that the central hole of the elastomer 10 and the hollow cylindrical portion 12a of the protective component 12 have a non-circular cross section. The protective component 12 can have a compensation convex block 12d, which is configured to compensate for the outer contour size of the airbag module. The airbag module 2 is supported on the elastomer 10 with a weakened portion, and the elastomer 10 is compressed by a mass block including the airbag module 2. Compared with the case where the elastomer has no weakening part, the elastomer with the weakening part is compressed to a greater extent, which can cause the outer contour size of the airbag module to deviate from the design. The compensation lug 12d can compensate for the outer contour size of the airbag module. It is particularly advantageous that the compensation lug 12d can be set at the six o'clock position. The compensation lug 12d can have a flat surface and thus form a surface contact with the elastomer 10. As a supplement, a curved lug 12e can be set at the three o'clock and nine o'clock positions of the protective bushing 12, respectively, and the curved lug can form a line contact with the elastomer 10. Through the combination of a compensation lug 12d and two curved lugs 12e, on the one hand, the outer contour size of the airbag module can be well compensated, and on the other hand, the freedom of movement can be maximized in the vibration reduction working state, so that the absorption of vibration energy is optimized. The height and plane size of the compensation lug can be appropriately selected to ensure a good match between the airbag module and the steering wheel. In order to prevent the protective component 12 and the elastic body 10 from excessively moving, the click lower plate 9 may have a stop element for limiting the maximum movement of the protective component 12 and the elastic body 10 .

[0056] In some embodiments not shown, the compensation convex block and / or the cambered surface convex block may also be formed on the axial end surface of the upper part of the elastic body 10. In some embodiments not shown, the compensation convex block and / or the cambered surface convex block may also be formed on the second surface of the flange 10c of the elastic body 10 facing the receiving hole. In some embodiments not shown, the compensation convex block and / or the cambered surface convex block may also be formed on the bottom area 10d of the elastic body 10. In some embodiments not shown, the compensation convex block and / or the cambered surface convex block may also be formed on the step surface 6b and / or the step surface 6c of the receiving hole 13.

[0057] The first housing part 5 can be held together by a connecting device so as not to be separated from the second housing part 6. Figure 4 As shown, the connecting device may include a step nut 8 and a bolt 14, and the step nut is bolted to the first housing component 5. The step nut has a step, and the step is axially stopped by the second housing component 6 and / or the elastic body 10 and / or the protective component 12, so that the first housing component 5 is separated from the second housing component 6 at a predetermined distance under the spring force of the click spring 11.

[0058] Figure 7 It is a partial cross-sectional view of a steering wheel vibration reduction system according to another embodiment. The difference between this embodiment and the aforementioned embodiment mainly lies in the design of the receiving hole 13 of the second housing component 6 and the elastomer 10. Here, the receiving hole 13 can have an inner peripheral surface 6a, a radially inwardly extending step surface 6b at the top and a radially outwardly extending step surface 6c at the bottom. The elastomer 10 can be constructed in a hollow cylindrical shape, installed upward from the bottom of the receiving hole 13, accommodated in the receiving hole 13 and supported on the two step surfaces 6b, 6c of the receiving hole 13. The elastomer 10 can have a flange 10c at the bottom, which is supported on the step surface 6c. The upper area of ​​the elastomer 10 can be supported on the step surface 6b. The protective component 12 can be constructed the same as or similar to the aforementioned embodiment. In other aspects, reference can be made to the description of the aforementioned embodiment.

[0059] Fig. 8A and Fig. 8B are perspective views of an elastomer 10 according to another embodiment, wherein the elastomer 10 has two groups of weakened portions 10g radially opposite to each other, each group may include a plurality of weakened portions, wherein the weakened portion shown in Fig. 8A may be approximately semi-cylindrical, and the weakened portion shown in Fig. 8B may have an approximately rectangular cross-section. In some embodiments not shown, the elastomer 10 may have at least one weakened portion in its outer peripheral surface, such as a plurality or a plurality of groups of weakened portions uniformly distributed on the outer peripheral surface. In some embodiments not shown, the elastomer 10 may have a hole in its matrix, such as an axially extending blind hole, as a weakened portion, for example, four holes uniformly distributed in the circumferential direction. In some embodiments not shown, the weakened portion may also extend in a direction different from the axial direction.

[0060] It should be noted that the terms used herein are for the purpose of illustrating specific aspects only and are not intended to limit the disclosure. As used herein, the singular forms "a" and "the one" shall not exclude the plural forms unless the context clearly states otherwise. It will be understood that the terms "include" and "comprise" and other similar terms, when used in the application documents, specify the existence of the stated operations, elements and / or parts, without excluding the existence or addition of one or more other operations, elements, parts and / or combinations thereof. As used herein, the term "and / or" includes all arbitrary combinations of one or more related enumerated items. In the description of the drawings, similar reference numerals always represent similar elements.

[0061] The thickness of the elements in the accompanying drawings can be exaggerated for the sake of clarity. It is also understood that if an element is referred to as being on another element, coupled to another element or connected to another element, then the element can be directly formed on the other element, coupled to it or connected to it, or one or more intervening elements can be arranged between them. On the contrary, if the expressions "directly on...", "directly coupled to..." and "directly connected to..." are used herein, then there is no intervening element. Other words used to illustrate the relationship between elements should be similarly interpreted, such as "between..." and "directly between...", "attachment" and "direct attachment", "adjacent" and "directly adjacent", etc.

[0062] Terms such as "top," "bottom," "above," "below," "above," "below," etc. are used herein to describe the relationship of one element, layer or region to another element, layer or region as illustrated in the drawings. It will be understood that these terms are intended to encompass other orientations of the device in addition to the orientation depicted in the drawings.

[0063] It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, the first element may be referred to as the second element without departing from the teachings of the present invention.

[0064] It is also conceivable that all exemplary embodiments disclosed herein can be combined with one another in any desired manner.

[0065] Finally, it should be pointed out that the above embodiments are only used to understand the present invention, and do not limit the protection scope of the present invention. For those skilled in the art, modifications can be made based on the above embodiments, and these modifications do not depart from the protection scope of the present invention.

Claims

1. A steering wheel vibration reduction system, comprising an airbag module (2) for a steering wheel and a click device for a vehicle horn, the airbag module comprising a first housing component (5), the click device comprising a second housing component (6) and a click spring (11) for separating the first housing component and the second housing component from each other, the second housing component being configured to be fixedly mounted to a steering wheel body (1), the steering wheel vibration reduction system comprising an elastic body (10) mounted to the second housing component and a protective component (12) for protecting the elastic body, the elastic body being configured to transmit vibration of the steering wheel body to the airbag module as a mass block, characterized in that: The elastomer has at least one weakening portion (10g) for weakening the stiffness of the elastomer, the weakening portion is configured to reduce the natural frequency of the steering wheel vibration damping system, and the steering wheel vibration damping system has a compensation cam (12d), the compensation cam is configured to compensate for the outer contour size of the airbag module so that the airbag module maintains a predetermined outer contour size relative to the steering wheel body.

2. The steering wheel vibration reduction system according to claim 1, characterized in that: The elastic body is configured in a hollow cylindrical shape and has a central hole, and the protective component is configured in a protective bushing and has a hollow cylindrical portion (12a) inserted into the central hole of the elastic body.

3. The steering wheel vibration reduction system according to claim 2, characterized in that: The steering wheel vibration reduction system includes a connecting device, which defines the maximum separation position of the first housing component relative to the second housing component under the action of the click spring, and the connecting device passes through the central hole of the elastomer, the hollow cylindrical part of the protective bushing and the click spring.

4. The steering wheel vibration reduction system according to claim 3, characterized in that: The connecting device is a bolt connecting device, comprising a step nut (8) and a bolt (14) screwed into the step nut, the step nut being fastened to the first housing component by the bolt, and the step of the step nut being able to abut against at least one of the second housing component, the elastomer and the protective bushing at the maximum separation position.

5. The steering wheel vibration reduction system according to any one of claims 2 to 4, characterized in that: The weakened portion includes at least one of the following components: - at least one groove extending in the inner circumference of the elastomer body; - at least one groove extending in the outer peripheral surface of the elastomer body; - At least one hole extending in the elastomeric matrix.

6. The steering wheel vibration reduction system according to any one of claims 2 to 4, characterized in that: The weakened portion includes at least one groove extending in the axial direction in the inner circumferential surface of the elastic body.

7. The steering wheel vibration reduction system according to any one of claims 2 to 4, characterized in that: The weakened portion includes at least two groups of grooves extending in the axial direction in the inner circumferential surface of the elastic body, the grooves of each group are arranged adjacent to each other in the circumferential direction of the elastic body, and the groups are distributed in the circumferential direction of the elastic body.

8. The steering wheel vibration reduction system according to any one of claims 1 to 4, characterized in that: The compensation cam is arranged on at least one of the protective component, the elastic body and the second housing component.

9. The steering wheel vibration reduction system according to any one of claims 1 to 4, characterized in that: The compensation convex block is arranged at the six o'clock position on the surface of the protection component facing the elastic body, and the compensation convex block forms a surface contact with the elastic body.

10. The steering wheel vibration reduction system according to claim 9, characterized in that: The compensation protrusion is a planar protrusion.

11. The steering wheel vibration reduction system according to claim 9, characterized in that: The protective component has arcuate convex blocks (12e) arranged at the three o'clock and nine o'clock positions on the surface of the protective component facing the elastic body, the arcuate convex blocks form a line contact with the elastic body, and the contact line forms a pivot axis of the protective component relative to the elastic body.

12. The steering wheel vibration reduction system according to any one of claims 1 to 4, characterized in that: The second housing component has a receiving hole (13) for receiving the elastic body and the protective component, and the elastic body, the protective component and the receiving hole are non-rotatable relative to each other in the axial direction.

13. The steering wheel vibration reduction system according to claim 12, characterized in that: The elastic body has a pin-shaped element (10f) which can be inserted into a positioning hole (6d) of the second housing part adjacent to the receiving hole.

14. The steering wheel vibration reduction system according to claim 12, characterized in that: The elastic body has a protrusion (10e), and the protective component has a notch (12c), and the protrusion can be received in the notch.

15. The steering wheel vibration reduction system according to claim 12, characterized in that: The receiving hole has an inner circumferential surface, a radially outward extending step surface at the top and a radially inward extending step surface at the bottom. The elastomer can be installed in the receiving hole from the side of the second shell component facing the first shell component. The elastomer has an outer circumferential surface opposite to the inner circumferential surface of the receiving hole and an upper flange. The bottom area of ​​the elastomer is supported on the step surface at the bottom of the receiving hole, and the flange of the elastomer is supported on the step surface at the top of the receiving hole.

16. The steering wheel vibration reduction system according to claim 12, characterized in that: The receiving hole has an inner circumferential surface, an upper step surface extending radially inward, and a bottom step surface extending radially outward. The elastomer can be installed in the receiving hole from the side of the second shell component facing away from the first shell component. The elastomer has an outer circumferential surface opposite to the inner circumferential surface of the receiving hole and a lower flange. The upper area of ​​the elastomer is supported on the upper step surface of the receiving hole, and the flange of the elastomer is supported on the bottom step surface of the receiving hole.

17. The steering wheel vibration reduction system according to claim 12, characterized in that: The second housing part is constructed in a U shape and has three receiving holes, one of which is arranged at the bottom of the U shape and the other two are arranged in the free end areas of the U shape, each receiving hole being equipped with the elastomer and the protective part and the click spring.

18. The steering wheel vibration reduction system according to any one of claims 1 to 4, characterized in that: The click device comprises a click lower plate (9), wherein the click lower plate has a limiting element, and the limiting element is configured to limit the maximum amount of movement of the protection component and the elastic body.

19. A steering wheel, comprising a steering wheel body (1), characterized in that: A steering wheel vibration damping system according to any one of claims 1 to 18 is arranged in a steering wheel body.

Images