A vibration damping system for a steering wheel

Abstract

The embodiment of the present specification provides a vibration damping system of a steering wheel for damping the vibration of a bridge plate installed on a hub of the steering wheel, comprising a fastener, an elastic body, a support and a biasing member, the elastic body comprising a cylindrical base part placed in a mounting hole of the bridge plate and a first limiting part and a second limiting part clamped on both sides of the bridge plate, a first notch is formed on the radial outer contour of the second limiting part, and the first notch penetrates through both end faces in the thickness direction of the second limiting part. By opening the first notch on the second limiting part, the radial support part under the second limiting part is provided with a first axial protrusion, when the bridge plate moves to the hub direction under the force, the first axial protrusion abuts against the bridge plate through the first notch, the first axial protrusion is inserted into the first notch, so that the rigidity of the elastic body can be changed, thereby changing the frequency of the elastic body.

Description

Technical Field

[0001] This specification relates to the technical field of steering wheels, and in particular to a vibration damping system of a steering wheel. Background Art

[0002] Vibration sources inside and outside the vehicle transmit vibration excitation to the steering column through the vehicle body, and the steering column then transmits it to the steering wheel. In order to improve the user experience, more and more steering wheels are equipped with frequency-tuned vibration dampers to reduce steering wheel vibration.

[0003] Currently, damper designs are relatively simple, requiring each damper to be compatible with only one steering wheel. Each new airbag development requires a new damper. The wide variety of damper styles makes reuse difficult, and the limited matching options hinder platform-based production. Furthermore, damper system design and development costs are high. Summary of the Invention

[0004] In view of this, an embodiment of the present specification provides a vibration damping system for a steering wheel, in which a first notch is opened on a second limiting portion below the bridge plate, and a first axial protrusion is provided on a radial support portion of the support member below the second limiting portion. When the bridge plate is forced to move toward the wheel hub, the first axial protrusion passes through the first notch and abuts against the bridge plate. The first axial protrusion is inserted into the first notch, which can change the stiffness of the elastomer, thereby changing the frequency of the elastomer.

[0005] The embodiments of this specification provide the following technical solutions: a vibration damping system for a steering wheel, for damping the vibration of a bridge plate installed on a steering wheel hub, comprising a fastener, an elastomer, a support member and a biasing member, the elastomer comprising a cylindrical base placed in a mounting hole of the bridge plate and a first limiting portion and a second limiting portion respectively clamped on both sides of the bridge plate, the support member comprising a guide cylinder and a radial support portion, the guide cylinder being inserted into the cylindrical base and forming a guide channel therein, one end of the fastener being fixed to the hub after passing through the guide channel, the biasing member pushing the radial supporting portion to abut against the second limiting portion, and further pushing the bridge plate to move in a direction away from the hub area until it stops after contacting the other end of the fastener,

[0006] A first notch is formed on the radial outer contour of the second limiting portion, and the first notch passes through both end surfaces of the second limiting portion in the thickness direction.

[0007] Preferably, a first axial protrusion is provided on the radial support portion, and when the bridge plate is subjected to vibration along the axial direction of the fastener or moves toward the hub due to external force, the first axial protrusion can pass through the first notch and abut against the bridge plate.

[0008] Preferably, a plurality of first notches are formed on the radial outer contour of the second limiting portion, and elastic protrusions are formed between the plurality of first notches and extend towards the first limiting portion to form first axial protrusions.

[0009] Preferably, a plurality of second axial protrusions are formed on the first limiting portion and extend towards the second limiting portion, and the plurality of second axial protrusions correspond to the plurality of first notches respectively.

[0010] Preferably, a plurality of axial recesses are formed on the side of the second limiting portion close to the radial support portion, and the radial support portion extends towards the second limiting portion to form second axial protrusions corresponding to the plurality of axial recesses, and when the second axial protrusions are embedded in the axial recesses, the top of the first axial protrusions extends into the first notches.

[0011] Preferably, the first notches are six, the first limiting portion is divided into six elastic protrusions by the six first notches, the first axial protrusions are four, and the second axial protrusions are three.

[0012] Preferably, a plurality of second notches are formed on the radial inner contour of the first limiting portion, the second notches pass through both ends of the thickness direction of the first limiting portion, and correspond to the plurality of elastic protrusions.

[0013] Preferably, a plurality of first protrusions are formed on the cylindrical base portion and extend towards the guide cylinder portion, and the plurality of first protrusions extend vertically from the first limiting portion between the plurality of second notches to the cylindrical base portion.

[0014] Preferably, a plurality of first notches are formed on the radial contour of the second limiting portion, and elastic protrusions are formed between the plurality of first notches, and the first limiting portion includes a plurality of spaced elastic arms corresponding to the plurality of first notches respectively.

[0015] Preferably, the elastic protrusions extend towards the first limiting portion to form first axial protrusions, and the elastic arms extend towards the second limiting portion to form a plurality of second axial protrusions.

[0016] Preferably, a plurality of first notches are formed on the radial contour of the second limiting portion, and elastic protrusions are formed between the plurality of first notches, and the thickness of the elastic protrusions gradually decreases along the direction away from the cylindrical base portion.

[0017] Preferably, the side of the elastic protrusion close to the first limiting portion is a flat surface, and the side of the elastic protrusion away from the first limiting portion is a curved surface.

[0018] Preferably, a plurality of first notches are formed on the radial outer contour of the second limiting part, and a plurality of third notches are formed on the radial inner contour of the first limiting part, and a plurality of ribs are formed between the plurality of third notches, and the plurality of ribs correspond to the plurality of first notches respectively.

[0019] Preferably, the cylindrical base part extends in the direction close to the guide cylinder part to form a plurality of vertical elastic protrusions.

[0020] Preferably, the damping system further comprises a cover plate, and the guide cylinder part is clamped with the cover plate arranged on the first limiting part after passing through the cylindrical base part.

[0021] Preferably, a plurality of fourth notches are formed on the guide cylinder part, and the guide cylinder part is divided into a plurality of arc-shaped elastic pieces by the plurality of fourth notches, and the plurality of arc-shaped elastic pieces all extend outward to form clamping claws, and the clamping claws press and fix the cover plate on the first limiting part.

[0022] Compared with the prior art, the above at least one technical solution adopted by the embodiments of the present application can achieve at least the following beneficial effects:

[0023] By forming the first notches on the second limiting part below the bridge plate, the radial supporting part below the second limiting part of the supporting member is provided with the first axial protrusion, when the bridge plate moves in the direction of the hub under force, the first axial protrusion passes through the first notches and abuts against the bridge plate, the first axial protrusion is inserted into the first notches, so that the rigidity of the elastic body can be changed, thereby changing the frequency of the elastic body. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is an explosion structure schematic diagram of the vibration damping system of the steering wheel provided by the present application;

[0026] Figure 2 is a structure schematic diagram of the elastic body in the first to sixth embodiments provided by the present application;

[0027] Figure 3 is Figure 2 is a bottom view of the elastic body in

[0028] Figure 4 is a structure schematic diagram of the supporting member of the vibration damping system of the steering wheel provided by the present application;

[0029] Figure 5 is a structure schematic diagram of the first axial protrusion of the vibration damping system of the steering wheel in the initial state of the application;

[0030] Figure 6 is a structure schematic diagram of the first axial protrusion of the vibration damping system of the steering wheel in the initial state of the application;

[0031] Figure 7 is a structure schematic diagram of the elastic body in the seventh embodiment of the application;

[0032] Figure 8 is a structure schematic diagram of the elastic body in the eighth to tenth embodiments of the application;

[0033] Figure 9 is a structure schematic diagram of the elastic body in the eleventh embodiment of the application;

[0034] Figure 10 is a structure schematic diagram of the elastic body in the initial state of the application; Figure 9

[0035] Figure 11 is a structure schematic diagram of the elastic body in the twelfth embodiment of the application.

[0036] In the figure, 1, fastener; 2, cover plate; 3, elastic body; 31, first limiting part; 32, second limiting part; 33, first notch; 34, elastic protrusion; 341, curved surface; 35, first axial protrusion; 36, second axial protrusion; 37, axial recess; 38, cylindrical base; 39, second notch; 310, first protrusion; 311, elastic arm; 312, third notch; 313, rib; 314, vertical elastic protrusion; 4, support; 41, radial support part; 42, guide cylinder part; 421, fourth notch; 422, arc-shaped elastic sheet; 423, clamping jaw; 43, first axial protrusion; 44, second axial protrusion; 5, bridge plate; 6, biasing member; 7, steering wheel hub. DETAILED DESCRIPTION

[0037] The embodiments of the application are described in detail below with reference to the accompanying drawings.

[0038] ​Following, the embodiments of the present application are described through specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in the specification without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0039] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect can be implemented both as any number of software running on a device and / or as an apparatus manufactured for a particular purpose. For example, an aspect can be implemented as a software routine running on a general purpose computer or be implemented as a hardware device, such as an application- specific integrated circuit.

[0040] It should also be noted that the figures provided in the following embodiments are only to illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the figures, not drawn according to the number, shape and size of the components in actual implementation, and the shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the layout of the components can also be more complex.

[0041] In addition, in the following description, specific details are provided to facilitate a thorough understanding of examples. However, one skilled in the art will understand that the described aspects can be practiced without these specific details.

[0042] It is one of the main functions currently required for steering wheels to reduce the vibration frequency of the steering wheel with a damping mechanism, which also serves the purpose of shock absorption. The existing technology of damping mechanism has the following three cases:

[0043] Case one: adjust the resonance frequency by adjusting the hardness of the damping mechanism, but the frequency adjustment range is very narrow by changing only the hardness, and the frequency tuning is difficult;

[0044] Case two: adjust the resonance frequency by adjusting the weight of the damping system, but the weight of the damping system is limited by factors such as material and space;

[0045] Case three: In general, the harder or more solid the damper structure in the damper unit, the higher the tuning frequency, and vice versa. The frequency of existing modular dampers is difficult to adjust to a lower frequency, for example, below 35 Hz.

[0046] At present, the steering wheel and the driver's airbag are connected through an intermediate click plate, the click plate and the steering wheel skeleton are fixed by disc head bolts, and the damping mechanism and the spring are installed on the click plate. The damping effect is to prevent the vibration of the airbag during driving and to control the buffer.

[0047] At present, the damper design structure is relatively single, and a damper can only match a steering wheel. The newly developed airbag needs to redevelop the damper each time. The damper style is more, not easy to reuse, single matching, not easy to platform production, and the damping system design and development cost is large.

[0048] The technical solutions provided by the embodiments of the present application are described below in combination with the drawings.

[0049] As shown in Figures 1-6 A vibration damping system of a steering wheel for damping the vibration of a bridge plate 5 installed on a hub 7 of the steering wheel, comprising a fastener 1, an elastic body 3, a support 4 and a biasing member 6, the elastic body 3 comprising a cylindrical base 38 placed in a mounting hole of the bridge plate 5 and a first limiting portion 31 and a second limiting portion 32 clamped on both sides of the bridge plate 5 respectively, the support 4 comprising a guide cylinder portion 42 and a radial support portion 41, the guide cylinder portion 42 being inserted into the cylindrical base 38 and forming a guide channel inside it, one end of the fastener 1 passing through the guide channel and being fixed on the hub, the biasing member 6 pushing the radial support portion 41 and the second limiting portion 32 to abut, and further pushing the bridge plate 5 to move away from the hub area until it stops after contacting the other end of the fastener 1.

[0050] A first notch 33 is formed on the radial outer contour of the second limiting portion 32, and the first notch 33 penetrates through both end faces in the thickness direction of the second limiting portion 32. The first notch 33 reduces the contact area of the second limiting portion 32 with the bridge plate 5 and the radial support portion 41 respectively, increases the deformation space of the elastic body 3 after being pressed, and realizes effective damping adjustment effect.

[0051] The radial support part 41 is provided with a first axial protrusion 43, when the bridge plate 5 is moved in the direction of the hub under the vibration or external force along the axial direction of the fastener 1, the first axial protrusion 43 can pass through the first gap 33 and abut against the bridge plate 5. The elastic body 3 is installed on the bridge plate 5 of the steering wheel hub 7, the elastic body 3 forms a first limiting part 31 and a second limiting part 32 on the opposite sides of the bridge plate 5 respectively, the second limiting part 32 is below the bridge plate 5, the guide cylinder part 42 of the support part 4 is inserted into the cylindrical base part 38 of the elastic body 3 from below, the radial support part 41 of the support part 4 is in contact with the second limiting part 32, the first gap 33 is formed on the second limiting part 32, and the radial support part 41 extends in the direction close to the second limiting part 32 to form the first axial protrusion 43. The first axial protrusion 43 extends into the first gap 33 without contacting the bridge plate 5 in the unforced state of the vibration damping system, as shown in Figure 5 When the bridge plate 5 is forced to move in the direction of the hub, the first axial protrusion 43 passes through the first gap 33 and abuts against the bridge plate 5, as shown in Figure 6 Then the radial support part 41 moves in the direction close to the hub together with the bridge plate 5.

[0052] It should be noted that the number of first axial protrusions 43 is less than the number of first gaps 33, by changing the number of first gaps 33, the elastic body 3 of different frequencies can be obtained, when the number of first gaps 33 is determined, by changing the number of first axial protrusions 43 (i.e. changing the number of first axial protrusions 43 inserted into the first gap 33) or the position of the first axial protrusion 43 inserted into the first gap 33, the damper of different frequencies can be obtained. The number of first gaps 33 in the design is through the design along the thickness direction on the radial outer contour of the second limiting part 32, which can effectively reduce the damping coordination frequency of the system, such as achieving 30-35Hz, and the abutment design of the first axial protrusion 43 and the bridge plate 5 can avoid the risk of the elastic body second limiting part 32 being excessively compressed and then being pulled out or failing.

[0053] It should be further noted that the fastener 1 is a disc head screw, the disc head part of the disc head screw is above the first limiting part 31, the screw part of the disc head screw is screwed with the hub after passing through the guide channel and the biasing part 6, and the biasing part 6 can be a spring.

[0054] It should be further noted that the elastic body 3 is made of EPDM or silicone, and the elastic body 3 can also be made of nylon or POM and two materials of EPDM or silicone, so that the elastic body 3 is soft and easy to deform, and can be fixed on the horn pressing plate or air bag shell, etc., to achieve the effect of shock absorption.

[0055] As shown in Figure 2As shown, in the first embodiment, a plurality of first notches 33 are formed on the radial profile of the second limiting portion 32, and elastic protrusions 34 are formed between the plurality of first notches 33. The elastic protrusions 34 extend toward the direction close to the first limiting portion 31 to form a first axial protrusion 35. By forming a plurality of first notches 33 on the radial profile of the second limiting portion 32, a plurality of elastic protrusions 34 are formed in the portion between the plurality of first notches 33. The plurality of first notches 33 and the plurality of elastic protrusions 34 are staggered, and the elastic protrusions 34 extend upward to form a first axial protrusion 35. The first axial protrusion 35 abuts against the lower surface of the bridge plate 5 to ensure the stability of the elastomer 3 installed on the bridge plate 5. When the bridge plate 5 is forced to move toward the wheel hub, the first axial protrusion 35 is deformed by the extrusion force of the bridge plate 5.

[0056] It should be noted that by changing the number of first notches 33, the stiffness of the elastomer 3 is changed, and the design of the first axial protrusion 35 further reduces the contact area with the bridge plate 5, thereby achieving a change in the frequency of the elastomer 3. When a lower frequency is required, the number of first notches 33 can be increased, and the shape design and number of the elastic protrusions 34 can be adjusted according to the stiffness of the damping system, thereby achieving the purpose of frequency adjustment.

[0057] like Figure 2 As shown, based on the above-mentioned first embodiment, in the second embodiment, the first limiting portion 31 extends toward the direction close to the second limiting portion 32 to form a plurality of second axial protrusions 36, and the plurality of second axial protrusions 36 respectively correspond to the plurality of first notches 33. The first limiting portion 31 extends downward to form a plurality of second axial protrusions, and the projection of the second axial protrusions is within the first notch 33. The second axial protrusions abut against the upper surface of the bridge plate 5, thereby ensuring the stability of the elastomer 3 installed on the bridge plate 5 and further adjusting the damping frequency.

[0058] like Figure 2As shown, based on the second embodiment described above, in a third embodiment, a plurality of axial recesses 37 are formed on a side of the second limiting portion 32 proximate to the radial support portion 41. The radial support portion 41 extends toward the second limiting portion 32 to form second axial protrusions 44 corresponding to the plurality of axial recesses 37. When the second axial protrusions 44 are embedded in the axial recesses 37, the top of the first axial protrusion 43 extends into the first notch 33. By providing the plurality of axial recesses 37 at the bottom of the second limiting portion 32 and forming the second axial protrusions 44 on the radial support portion 41 to cooperate with the plurality of axial recesses 37, when the support member 4 and the elastic body 3 are assembled, the second axial protrusions 44 at least partially embed within the corresponding axial recesses 37, ensuring stability of the support member 4 and the elastic body 3 after assembly. Furthermore, because the stiffness of the second axial protrusions 44 is different from that of the second limiting portion 32, the stiffness of the elastic body 3 also changes to a certain extent when the second axial protrusions 44 are embedded in the axial recesses 37, thereby enabling frequency adjustment of the elastic body 3.

[0059] It should be noted that the number of the second axial protrusions 44 is less than or equal to the number of the axial recesses 37. When the number of the second axial protrusions 44 is less than the number of the axial recesses 37, the support member 4 can be rotated as needed to select one or several axial recesses 37 to embed the second axial protrusions 44.

[0060] like Figure 2 As shown, based on the above-mentioned third embodiment, in the fourth embodiment, six first notches 33 are provided, and the six first notches 33 divide the second limiting portion 32 into six elastic protrusions 34, four first axial protrusions 43 are provided, and three second axial protrusions 44 are provided. By arranging six first notches 33 and six elastic protrusions 34 that are staggered, the six first notches 33 and the six elastic protrusions 34 are all evenly distributed in a ring shape, four first axial protrusions 43 are provided, and the first axial protrusions 43 are embedded in four of the first notches 33, and an axial recess 37 is provided at the bottom of the six elastic protrusions 34, and three second axial protrusions 44 are provided, and the three second axial protrusions 44 are respectively embedded in three of the axial recesses 37.

[0061] It should be noted that, in other embodiments, the number of first notches 33 can be any value between 0 and 12, and the number of first axial protrusions 43 can be any value other than four, as long as each first axial protrusion 43 can correspond to the first notch 33, and the number of second axial protrusions 44 can be any value other than three, as long as each second axial protrusion 44 can correspond to the axial recess 37.

[0062] It should be noted that when different first notches 33 of the elastomer 3 are required, the elastomer 3 can be multi-cavity in one mold, different inserts are interchanged through the same mold, different structures of the elastomer 3 are realized, and different frequencies are achieved.

[0063] As shown in Figure 3 the fifth embodiment based on the above first embodiment, the first limiting portion 31 is provided with a plurality of second notches 39 in the radial inner contour, the second notches 39 penetrate through the two end faces of the thickness direction of the first limiting portion 31, and correspond to the plurality of elastic blocks 34. By providing a plurality of second notches 39 in the radial inner contour of the first limiting portion 31, the stiffness of the elastomer 3 can be further reduced, thereby reducing the frequency of the elastomer 3. The projection of the plurality of second notches 39 along the axial direction of the cylindrical base 38 is at the elastic block 34.

[0064] It should be noted that the number of second notches 39 can be adjusted according to the stiffness requirement of the elastomer 3, and the number of second notches 39 can be 0-12. The corresponding arrangement of the second notches 39 in the radial inner part of the first limiting portion 31 and the elastic blocks 34 of the second limiting portion 32 can largely eliminate the small damping frequency of the elastomer 3 while maintaining the stability of the elastomer 3 in the system.

[0065] As shown in Figure 2 the sixth embodiment based on the above fifth embodiment, the cylindrical base 38 extends inwards towards the direction of the guide cylinder portion 42 to form a plurality of first protrusions 310, and the plurality of first protrusions 310 vertically extend from the first limiting portion 31 between the plurality of second notches 39 to the cylindrical base 38. The plurality of first protrusions 310 correspond to the plurality of first notches 33 respectively, and the inner wall of the cylindrical base 38 extends inwards towards the direction of the guide cylinder portion 42 to form a plurality of first protrusions 310, which are uniformly distributed in a ring shape. The plurality of first protrusions 310 are in contact with the outer wall of the guide cylinder portion 42, which ensures the stability of the elastomer 3 after being matched with the support 4, and the plurality of first protrusions 310 correspond to the plurality of first notches 33 respectively, which ensures the rigidity of the elastomer 3.

[0066] It should be noted that the number of first protrusions 310 can be adjusted according to the stiffness requirement of the elastomer 3, and the number of first protrusions 310 can be 0-12. Through this design, the contact area of the elastomer 3 with the guide cylinder portion 42 in the radial direction is further reduced, and the adjustment purpose of lower frequency is achieved.

[0067] As shown in Figure 7As shown, in the seventh embodiment, a plurality of first notches 33 are formed on the radial profile of the second limiting portion 32, and elastic protrusions 34 are formed between the plurality of first notches 33. The first limiting portion 31 includes a plurality of radial elastic arms 311 arranged at intervals, and the plurality of elastic arms 311 respectively correspond to the plurality of first notches 33. By opening the first notches 33 on the second limiting portion 32, elastic protrusions 34 are formed between adjacent first notches 33. At the same time, the first limiting portion 31 is constituted by a plurality of elastic arms 311 arranged at intervals. The projections of the plurality of elastic arms 311 along the axial direction of the cylindrical base 38 are at the first notches 33, that is, the projections of the elastic arms 311 and the projections of the elastic protrusions 34 are staggered, which is not only beneficial to the contact between the upper and lower end faces of the bridge plate 5 and the elastic body 3, but also can reduce the stiffness of the elastic body 3 and is beneficial to the demolding, thereby improving the life of the mold.

[0068] It should be noted that the difference between the elastic protrusions 34 and the elastic arms 311 is that the elastic protrusions 34 are radially connected within the first notches 33 of the second stopper 32, while the elastic arms 311 are individually connected to the cylindrical base 38 and are not connected to each other. This design further reduces the axial contact area between the elastic body 3 and both sides of the bridge plate 5, achieving lower frequency regulation. In actual applications, the elastic protrusions and elastic arms can be provided separately on the first stopper 31 and the second stopper 32, depending on the desired damping effect, but they should be arranged in an alternating manner.

[0069] It should also be noted that in the prior art, the damping frequency range of steering wheels is generally 35 Hz to 55 Hz. However, by implementing the above embodiments, either individually or in combination, the damper frequency can be achieved in the range of 20 Hz to 60 Hz. When a lower frequency is not required, the number of first notches 33 and / or elastic arms 311 can be reduced to increase the stiffness of the elastic body 3, thereby increasing the damper frequency.

[0070] like Figure 8 As shown, based on the above-mentioned seventh embodiment, in the eighth embodiment, the elastic protrusion 34 extends in the direction close to the first limiting portion 31 to form a first axial protrusion 35, and the elastic arm 311 extends in the direction close to the second limiting portion 32 to form a plurality of second axial protrusions 36. The upper surface of the elastic protrusion 34 is formed with a first axial protrusion 35, and the lower surface of the elastic arm 311 is formed with a second axial protrusion. The first axial protrusion 35 is in contact with the lower surface of the bridge plate 5, and the second axial protrusion is in contact with the upper surface of the bridge plate 5. While ensuring the stability of the elastomer 3 installed on the bridge plate 5, the stiffness of the elastomer 3 can be reduced, thereby reducing the frequency of the elastomer 3.

[0071] like Figures 7-8As shown, in the ninth embodiment, a plurality of first notches 33 are formed on the radial profile of the second limiting portion 32, and elastic protrusions 34 are formed between the plurality of first notches 33. The thickness of the elastic protrusions 34 gradually decreases in the direction away from the cylindrical base 38. By setting the elastic protrusions 34 to a gradient thickness, the farther the elastic protrusions 34 are from the cylindrical base 38, the smaller the thickness is, and the material of the elastic protrusions 34 can be further reduced, thereby reducing the stiffness of the elastomer 3 and ensuring that the elastomer 3 can reach a lower frequency.

[0072] like Figures 7-8 As shown, based on the above-mentioned ninth embodiment, in the tenth embodiment, the side of the elastic protrusion 34 close to the first limiting portion 31 is a plane, and the side of the elastic protrusion 34 away from the first limiting portion 31 is a curved surface 341. The thickness of the elastic protrusion 34 is reduced by setting the bottom surface of the elastic protrusion 34 to the curved surface 341, and the top surface of the elastic protrusion 34 is a plane, thereby ensuring the stability of the elastic protrusion 34 (or the first axial protrusion 35) after contact with the bridge plate 5.

[0073] like Figures 9-10 As shown, in the eleventh embodiment, a plurality of third notches 312 are provided in the radial inner contour of the first limiting portion 31, and the third notches 312 extend to the inside of the cylindrical base 38. A plurality of ribs 313 are formed between the third notches 312, and the ribs 313 respectively correspond to the first notches 33. By providing a plurality of third notches 312 in the radial inner contour of the first limiting portion 31, the stiffness of the elastomer 3 can be further reduced, thereby reducing the frequency of the elastomer 3. Ribs 313 are formed between adjacent third notches 312, and each rib 313 respectively corresponds to a first notch 33.

[0074] like Figure 11 As shown, in the twelfth embodiment, the cylindrical base 38 extends toward the direction close to the guide cylinder 42 to form a plurality of vertical elastic protrusions 314. A plurality of vertical elastic protrusions 314 are formed by extending from the inner wall of the cylindrical base 38. The plurality of vertical elastic protrusions 314 are in contact with the outer wall of the guide cylinder 42, thereby ensuring the stability of the support member 4 and the elastomer 3 after installation, and at the same time reducing the stiffness of the elastomer 3.

[0075] like Figure 2 and Figures 7-8As shown, based on any one of the above (except the fourth) embodiments, in the thirteenth embodiment, the first notches 33 are provided with six, and the six first notches 33 divide the second limiting portion 32 into six elastic blocks 34, the first axial protrusions 43 are provided with four, and the six elastic blocks 34 are formed on the second limiting portion 32 through the six first notches 33, and the four first axial protrusions 43 are formed on the radial support portion 41, and the four first axial protrusions 43 are respectively embedded in the four first notches 33, and the rigidity of the first axial protrusions 43 is different from the rigidity of the elastic blocks 34.

[0076] As shown in Figure 1 and Figures 5-6 As shown, based on any one of the above (except the thirteenth) embodiments, in the fourteenth embodiment, in some embodiments, the damping system further comprises a cover plate 2, and the guide cylinder portion 42 is clamped with the cover plate 2 provided on the first limiting portion 31 after passing through the cylindrical base 38. By providing the cover plate 2 above the first limiting portion 31, the top end of the guide cylinder portion 42 is clamped with the cover plate 2 after passing through the cylindrical base 38, the cover plate 2 is fastened on the first limiting portion 31, and the connection between the elastic body 3, the support 4 and the cover plate 2 is achieved.

[0077] As shown in Figures 4-6 As shown, based on the above fourteenth embodiment, in the fifteenth embodiment, a plurality of fourth notches 421 are opened on the guide cylinder portion 42, and the plurality of fourth notches 421 divide the guide cylinder portion 42 into a plurality of arc-shaped elastic pieces 422, and the plurality of arc-shaped elastic pieces 422 all extend outward to form clamping claws 423, and the clamping claws 423 press and fix the cover plate 2 on the first limiting portion 31. By opening the fourth notches 421 on the guide cylinder portion 42, the guide cylinder portion 42 is divided into a plurality of arc-shaped elastic pieces 422, so that the arc-shaped elastic pieces 422 can move to the first limiting portion 31 through the cylindrical base 38, the end of the arc-shaped elastic piece 422 extends outward to form a clamping claw 423, the clamping claw 423 press and fixes the cover plate 2 on the first limiting portion 31, and the fastening connection between the elastic body 3, the support 4 and the cover plate 2 is achieved.

[0078] It should be noted that the size of the clamping claw 423 is greater than the size of the second notch 39, which can prevent the clamping claw 423 from being clamped into the second notch 39, and ensure the installation and damping function of the damper.

[0079] It should be further noted that the number of clamping claws 423 can be increased or decreased according to actual conditions, so as to adjust different hand feeling needs.

[0080] The same or similar parts among various embodiments in the specification can be referred to each other, and each embodiment focuses on the difference from other embodiments. Especially, for the method embodiments described later, since they are corresponding to the system, the description is relatively simple, and the relevant parts can be referred to the part of the system embodiment.

[0081] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A vibration damping system for a steering wheel, for damping the vibration of a bridge plate installed on a steering wheel hub, comprising a fastener, an elastic body, a support member and a biasing member, the elastic body comprising a cylindrical base placed in a mounting hole of the bridge plate and a first limiting portion and a second limiting portion respectively clamped on both sides of the bridge plate, the support member comprising a guide cylinder and a radial support portion, the guide cylinder being inserted into the cylindrical base and forming a guide channel therein, one end of the fastener being fixed to the wheel hub after passing through the guide channel, the biasing member pushing the radial supporting portion to abut against the second limiting portion, and further pushing the bridge plate to move in a direction away from the wheel hub area until it stops after contacting the other end of the fastener, characterized in that A plurality of first notches are formed on the radial outer contour of the second limiting portion, and the first notches penetrate through both end surfaces of the second limiting portion in the thickness direction; The radial support portion is provided with a first axial protrusion, and when the bridge plate is subjected to vibration along the axial direction of the fastener or is moved toward the hub by an external force, the first axial protrusion can pass through the first notch and abut against the bridge plate; An elastic protrusion is formed between the first notches, and the elastic protrusion extends toward the first limiting portion to form a first axial protrusion; The damping system further includes a cover plate, wherein the guide cylinder portion passes through the cylindrical base portion and engages with the cover plate provided on the first limiting portion; The guide cylinder portion is provided with a plurality of fourth notches, which divide the guide cylinder portion into a plurality of arc-shaped elastic pieces. The plurality of arc-shaped elastic pieces extend outward to form claws, which press and fix the cover plate on the first limiting portion.

2. The vibration damping system of the steering wheel according to claim 1, characterized in that: The first limiting portion extends in a direction close to the second limiting portion to form a plurality of second axial protrusions, and the plurality of second axial protrusions respectively correspond to the plurality of first notches.

3. The vibration damping system of the steering wheel according to claim 1, characterized in that: A plurality of axial recesses are provided on one side of the second limiting portion close to the radial support portion, and the radial support portion extends toward the second limiting portion to form second axial protrusions corresponding to the plurality of axial recesses. When the second axial protrusion is embedded in the axial recess, the top of the first axial protrusion extends into the first notch.

4. The vibration damping system of the steering wheel according to claim 3, characterized in that: There are six first notches, which divide the second limiting portion into six elastic protrusions. There are four first axial protrusions, and three second axial protrusions.

5. The vibration damping system of the steering wheel according to any one of claims 1 to 4, characterized in that: A plurality of second notches are formed in the radial inner contour of the first limiting portion. The second notches pass through both ends of the first limiting portion in the thickness direction and correspond to the plurality of elastic protrusions.

6. The vibration damping system of the steering wheel according to claim 5, characterized in that: A plurality of first protrusions are formed by extending inwardly of the cylindrical base toward the guide cylindrical portion. The plurality of first protrusions extend vertically from the first limiting portion between the plurality of second notches toward the cylindrical base.

7. The vibration damping system of the steering wheel according to claim 1, characterized in that: A plurality of first notches are formed on the radial profile of the second limiting portion, and elastic protrusions are formed between the first notches. The first limiting portion includes a plurality of elastic arms arranged at intervals, and the elastic arms respectively correspond to the first notches.

8. The vibration damping system of the steering wheel according to claim 7, characterized in that: The elastic protrusion extends in a direction close to the first limiting portion to form a first axial protrusion, and the elastic arm extends in a direction close to the second limiting portion to form a plurality of second axial protrusions.

9. The vibration damping system of the steering wheel according to claim 1, characterized in that: A plurality of first notches are formed on the radial profile of the second limiting portion, and elastic protrusions are formed between the first notches. The thickness of the elastic protrusions gradually decreases in a direction away from the cylindrical base.

10. The vibration damping system of the steering wheel according to claim 9, characterized in that: A side of the elastic protrusion close to the first limiting portion is a flat surface, and a side of the elastic protrusion away from the first limiting portion is a curved surface.

11. The vibration damping system of the steering wheel according to claim 1, characterized in that: A plurality of first notches are formed on the radial outer contour of the second limiting portion, a plurality of third notches are formed on the radial inner contour of the first limiting portion, a plurality of ribs are formed between the plurality of third notches, and the plurality of ribs respectively correspond to the plurality of first notches.

12. The vibration damping system of the steering wheel according to claim 1, characterized in that: The cylindrical base portion extends toward the direction close to the guide cylindrical portion to form a plurality of vertical elastic protrusions.

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