Vibration damping system of steering wheel

Abstract

The vibration damping system of the steering wheel is used for damping vibration of a bridge plate installed on a hub of the steering wheel and comprises a fastening piece, an elastic body, a supporting piece and a bias piece, the elastic body comprises a cylindrical base portion arranged in an installation hole of the bridge plate, a first limiting portion and a second limiting portion, and the first limiting portion and the second limiting portion are clamped on the two sides of the bridge plate. A first notch is formed in the radial outer contour of the second limiting part and penetrates through the two end faces, in the thickness direction, of the second limiting part. The first notches are formed in the second limiting parts, the first axial protrusions are arranged on the radial supporting parts, located below the second limiting parts, of the supporting pieces, and when the bridge plate is stressed to move towards the hub, the first axial protrusions penetrate through the first notches to abut against the bridge plate and are inserted into the first notches, so that the rigidity of the elastic bodies can be changed, and the rigidity of the elastic bodies is changed. Therefore, the frequency of the elastomer is changed.

Description

Technical Field

[0001] The present 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 car transmit vibration excitation to the steering column through the car body, and the steering column 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 the vibration of the steering wheel.

[0003] At present, the design structure of dampers is relatively simple. One damper can only be matched with one steering wheel. Each time a new airbag is developed, the damper needs to be redeveloped. There are many styles of dampers, which are not easy to reuse, have a single match, are not easy to produce on a platform, and the design and development cost of the damping system is 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, wherein a first notch is opened on a second limiting portion below a bridge plate, and a first axial protrusion is provided on a radial supporting portion of a 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, used 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, wherein the elastomer comprises 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 comprises a guide cylinder and a radial supporting portion, the guide cylinder is inserted into the cylindrical base and a guide channel is formed inside the guide cylinder, one end of the fastener is fixed to the hub after passing through the guide channel, the biasing member pushes the radial supporting portion to abut against the second limiting portion, and further pushes 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 first notches. The elastic protrusions extend toward the direction approaching the first limiting portion to form a first axial protrusion.

[0009] Preferably, 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.

[0010] Preferably, a plurality of axial recesses are formed on one side of the second limiting portion close to the radial supporting portion, and the radial supporting portion extends toward the second limiting portion to form second axial protrusions corresponding to the plurality of axial recesses, and when the second axial protrusion is embedded in the axial recess, the top of the first axial protrusion extends into the first notch.

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

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

[0013] Preferably, the cylindrical base extends inwardly in a direction close to the guide cylindrical portion to form a plurality of first protrusions, and the plurality of first protrusions extend vertically from the first limiting portions between the plurality of second notches toward the cylindrical base.

[0014] Preferably, a plurality of first notches are formed on the radial profile of the second limiting portion, elastic protrusions are formed between the first notches, and the first limiting portion includes a plurality of elastic arms arranged at intervals, and the plurality of elastic arms respectively correspond to the plurality of first notches.

[0015] Preferably, 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.

[0016] Preferably, 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.

[0017] Preferably, 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.

[0018] Preferably, 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.

[0019] Preferably, the cylindrical base extends toward the direction approaching the guide cylindrical portion to form a plurality of vertical elastic protrusions.

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

[0021] Preferably, a plurality of fourth notches are formed on the guide cylinder portion, and the plurality of fourth notches divide the guide cylinder portion into a plurality of arc-shaped elastic sheets, and the plurality of arc-shaped elastic sheets extend outward to form claws, and the claws press and fix the cover plate on the first limiting portion.

[0022] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0023] By opening a first notch on the second limiting portion below the bridge plate, a first axial protrusion is provided on the radial supporting 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

[0027] Figure 3 yes Figure 2 Bottom view of the elastic body;

[0028] Figure 4 It is a structural schematic diagram of a support member of a vibration damping system of a steering wheel provided in the present application;

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

[0030] Figure 6 It is a structural schematic diagram of the first axial protrusion of the vibration damping system of the steering wheel provided by the present application when it contacts the bridge plate;

[0031] Figure 7 is a schematic structural diagram of an elastomer in a seventh embodiment provided in the present application;

[0032] Figure 8 1 is a schematic diagram of the structure of the elastic body in the eighth to tenth embodiments provided in the present application;

[0033] Fig. 9 is a schematic structural diagram of an elastomer in an eleventh embodiment provided in the present application;

[0034] Fig.10 yes Fig. 9 A schematic diagram of the structure after the elastic body and the support member are installed in coordination;

[0035] Fig.11 It is a schematic diagram of the structure of the elastomer in the twelfth embodiment provided in the present application.

[0036] In the figure, 1, fastener; 2, cover plate; 3, elastic body; 31, first limiting portion; 32, second limiting portion; 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 member; 41, radial support portion; 42, guide cylinder; 421, fourth notch; 422, arc-shaped elastic sheet; 423, claw; 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 present application are described in detail below with reference to the accompanying drawings.

[0038] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. 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 implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0039] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0040] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0041] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0042] Using a damping mechanism to reduce the vibration frequency of the steering wheel and achieve the purpose of shock absorption is one of the main functions that steering wheels are generally required to have. Currently, there are three existing technologies for damping mechanisms:

[0043] Case 1: The resonant frequency is adjusted by adjusting the hardness of the damping mechanism, but the frequency adjustment range is very narrow when only the hardness is changed, and frequency tuning is difficult;

[0044] Case 2: The resonant frequency is adjusted by adjusting the weight of the damping system, but the weight of the damping system is limited by factors such as materials and space;

[0045] Case 3: Generally speaking, the stiffer or more solid the damper structure in the damper unit is, the higher the tuning frequency is, and vice versa. The frequency of the existing module damper is difficult to adjust to a lower frequency, for example, below 35 Hz.

[0046] At present, many car steering wheels and main driver airbags are connected to each other through an intermediate click plate. The click plate and the steering wheel frame are tightened and fixed by pan head bolts. A damping mechanism and a spring are installed on the click plate. The function of the damping is to prevent the vibration generated by the airbag during the driving of the car and control the buffer.

[0047] At present, the design structure of dampers is relatively simple. One damper can only be matched with one steering wheel. Each time a new airbag is developed, the damper needs to be redeveloped. There are many styles of dampers, which are not easy to reuse, have a single match, are not easy to produce on a platform, and the design and development cost of the damping system is high.

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

[0049] like Figure 1-Figure 6 As shown, a vibration damping system of a steering wheel is used to damp the vibration of a bridge plate 5 installed on a steering wheel hub 7, comprising a fastener 1, an elastomer 3, a support member 4 and a biasing member 6, wherein the elastomer 3 comprises 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 respectively clamped on both sides of the bridge plate 5, the support member 4 comprises a guide cylinder portion 42 and a radial supporting portion 41, the guide cylinder portion 42 is inserted into the cylindrical base 38, and a guide channel is formed therein, one end of the fastener 1 is fixed to the hub after passing through the guide channel, the biasing member 6 pushes the radial supporting portion 41 to abut against the second limiting portion 32, and further pushes the bridge plate 5 to move in a direction away from the hub area until it contacts the other end of the fastener 1 and stops.

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

[0051] The radial support portion 41 is provided with a first axial protrusion 43. When the bridge plate 5 is subjected to vibration along the axial direction of the fastener 1 or is moved toward the hub by an external force, the first axial protrusion 43 can pass through the first notch 33 and abut against the bridge plate 5. The elastomer 3 is installed on the bridge plate 5 of the steering wheel hub 7. The elastomer 3 forms a first limiting portion 31 and a second limiting portion 32 on opposite sides of the bridge plate 5, respectively. The second limiting portion 32 is located below the bridge plate 5. The guide cylinder portion 42 of the support member 4 is inserted from below into the cylindrical base 38 of the elastomer 3. The radial support portion 41 of the support member 4 contacts the second limiting portion 32. By opening the first notch 33 on the second limiting portion 32, the radial support portion 41 extends toward the direction close to the second limiting portion 32 to form the first axial protrusion 43. In the vibration damping system, when it is not subjected to force, the top portion of the first axial protrusion 43 extends into the first notch 33, but does not contact the bridge plate 5. Figure 5 When the bridge plate 5 is forced to move toward the hub direction, the first axial protrusion 43 passes through the first notch 33 and abuts against the bridge plate 5, as shown Figure 6 Then the radial support portion 41 moves together with the bridge plate 5 toward the direction close to the hub.

[0052] It should be noted that the number of the first axial protrusions 43 is less than the number of the first notches 33. By changing the number of the first notches 33, the elastic body 3 of different frequencies can be obtained. When the number of the first notches 33 is determined, the damper of different frequencies can be obtained by changing the number of the first axial protrusions 43 (i.e., changing the number of the first axial protrusions 43 inserted into the first notches 33) or the position of the first axial protrusion 43 inserted into the first notches 33. The first notches 33 of the present design are through-designed along the thickness direction on the radial outer contour of the second limit portion 32, which can effectively reduce the damping coordination frequency of the system, such as achieving 30-35Hz. At the same time, the abutment design of the first axial protrusion 43 and the bridge plate 5 avoids the risk of the second limit portion 32 of the elastic body coming out or failing after being compressed to the limit.

[0053] It should be further explained that the fastener 1 is a pan head screw, the pan head portion of the pan head screw is located above the first limiting portion 31, the screw portion of the pan head screw passes through the guide channel and the biasing member 6 and is screwed to the wheel hub, and the biasing member 6 can be a spring.

[0054] It should also be noted that the elastomer 3 is made of EPDM or silicone, and the elastomer 3 can also be made of nylon or POM and EPDM or silicone, so that the elastomer 3 is softer and easier to deform, and can be fixed on a horn soundboard or an airbag housing, etc., to achieve a shock-absorbing effect.

[0055] like 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. A plurality of first notches 33 are formed on the radial profile of the second limiting portion 32, and 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 alternately arranged, 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. 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. 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, and 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 notches 33, and 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, in the third embodiment, a plurality of axial recesses 37 are provided on one side of the second limiting portion 32 close to the radial support portion 41, and the radial support portion 41 extends in a direction close to the second limiting portion 32 to form a second axial protrusion 44 corresponding to the plurality of axial recesses 37, and when the second axial protrusion 44 is embedded in the axial recess 37, the top of the first axial protrusion 43 extends into the first notch 33. By providing a plurality of axial recesses 37 at the bottom of the second limiting portion 32, a second axial protrusion 44 matching with the plurality of axial recesses 37 is formed on the radial support portion 41, and when the support member 4 and the elastic body 3 are assembled with each other, the second axial protrusion 44 is at least partially embedded in the corresponding axial recess 37, so as to ensure the stability of the support member 4 and the elastic body 3 after assembly, and at the same time, because the stiffness of the second axial protrusion 44 is different from that of the second limiting portion 32, when the second axial protrusion 44 is embedded in the axial recess 37, the stiffness of the elastic body 3 will also change to a certain extent, so as to achieve the adjustment of the frequency 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 axial recesses 37 are 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, so as to ensure that 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, so as to ensure that each second axial protrusion 44 can correspond to the axial recess 37.

[0062] It should also be noted that when it is necessary to obtain an elastomer 3 with different numbers of first notches 33, the elastomer 3 can be molded with multiple cavities. By using the same mold and exchanging different inserts, different structures of the elastomer 3 can be realized to achieve different frequencies.

[0063] like Figure 3 As shown, based on the above-mentioned first embodiment, in a fifth embodiment, a plurality of second notches 39 are provided in the radial inner contour of the first limiting portion 31, and the second notches 39 pass through the two end surfaces of the first limiting portion 31 in the thickness direction, and correspond to the plurality of elastic protrusions 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, and the projections of the plurality of second notches 39 along the axial direction of the cylindrical base 38 are located at the elastic protrusions 34.

[0064] It should be noted that the number of the second notches 39 can be adjusted according to the stiffness requirements of the elastic body 3, and the number of the second notches 39 can be 0 to 12. The corresponding arrangement of the second notches 39 radially inside the first limiting portion 31 and the elastic protrusion 34 of the second limiting portion 32 can maintain the stability of the elastic body 3 in the system while largely eliminating the volume of the elastic body 3 to achieve a lower damping frequency.

[0065] like Figure 2 As shown, based on the fifth embodiment, in the sixth embodiment, the cylindrical base 38 extends inwardly toward the guide cylinder 42 to form a plurality of first protrusions 310, and the plurality of first protrusions 310 extend vertically from the first limiting portion 31 between the plurality of second notches 39 toward 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 toward the guide cylinder 42 to form a plurality of first protrusions 310, and the plurality of first protrusions 310 are evenly distributed in a ring shape, and the plurality of first protrusions 310 are in contact with the outer wall of the guide cylinder 42, to ensure the stability of the elastic body 3 after being matched with the support member 4, and the plurality of first protrusions 310 correspond to the plurality of first notches 33, respectively, to ensure the rigidity of the elastic body 3.

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

[0067] like 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 located 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 in contact with the bridge plate 5, but also can reduce the stiffness of the elastomer 3 and is also beneficial to the demolding process, thereby increasing the service life of the mold.

[0068] It should be noted that the difference between the elastic protrusion 34 and the elastic arm 311 is that a plurality of elastic protrusions 34 are connected radially inwardly of a plurality of first notches 33 of the second limiting portion 32, while a plurality of elastic arms 311 are respectively connected to the cylindrical base 38 and are not connected to each other. Through this design, the contact area between the elastic body 3 and both sides of the bridge plate 5 in the axial direction is further reduced, and the purpose of adjusting the lower frequency is achieved. In practical applications, according to the damping effect actually required, the elastic protrusions and elastic arms can also be respectively arranged on the first limiting portion 31 and the second limiting portion 32, but they need to be arranged in a staggered manner.

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

[0070] like Figure 8 As shown, based on the seventh embodiment mentioned above, 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 contacts the lower surface of the bridge plate 5, and the second axial protrusion contacts 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 Figure 7-Figure 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 gradual thickness, the farther away from the cylindrical base 38, the smaller the thickness of the elastic protrusions 34. The material of the elastic protrusions 34 can be further reduced, thereby reducing the stiffness of the elastomer 3, thereby ensuring that the elastomer 3 can reach a lower frequency.

[0072] like Figure 7-Figure 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 contacting the bridge plate 5.

[0073] like Figure 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, and 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, and ribs 313 are formed between adjacent third notches 312, and each rib 313 respectively corresponds to a first notch 33.

[0074] like Fig.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 rigidity of the elastomer 3.

[0075] like Figure 2 and Figure 7-Figure 8As shown, based on any one of the above-mentioned embodiments (except the fourth), in the thirteenth 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 six elastic protrusions 34 are formed on the second limiting portion 32 through the six first notches 33. 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 stiffness of the first axial protrusion 43 is different from the stiffness of the elastic protrusion 34.

[0076] like Figure 1 and Figure 5-Figure 6 As shown, based on any one of the above-mentioned embodiments (except the thirteenth), in the fourteenth embodiment, in some embodiments, the damping system also includes a cover plate 2, and the guide cylinder portion 42 passes through the cylindrical base 38 and engages with the cover plate 2 arranged on the first limiting portion 31. By arranging the cover plate 2 above the first limiting portion 31, the top end of the guide cylinder portion 42 passes through the cylindrical base 38 and engages with the cover plate 2, and the cover plate 2 is fastened to the first limiting portion 31, thereby realizing the connection between the elastomer 3, the support member 4 and the cover plate 2.

[0077] like Figure 4-Figure 6 As shown, based on the above-mentioned fourteenth embodiment, in the fifteenth embodiment, a plurality of fourth notches 421 are provided 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 sheets 422, and the plurality of arc-shaped elastic sheets 422 all extend outward to form claws 423, and the claws 423 press and fix the cover plate 2 on the first limiting portion 31. By providing the fourth notches 421 on the guide cylinder portion 42, the guide cylinder portion 42 is divided into a plurality of arc-shaped elastic sheets 422, so that the arc-shaped elastic sheets 422 can pass through the cylindrical base 38 to move to the first limiting portion 31, and the ends of the arc-shaped elastic sheets 422 all extend outward to form claws 423, and the claws 423 press and fix the cover plate 2 on the first limiting portion 31, thereby realizing a fastening connection between the elastomer 3, the support member 4 and the cover plate 2.

[0078] It should be noted that the size of the claw 423 is larger than the size of the second notch 39, which can prevent the claw 423 from being stuck in the second notch 39, thereby ensuring the installation and shock-absorbing function of the damper.

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

[0080] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment described later, since it corresponds to the system, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0081] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A vibration damping system for a steering wheel, used 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, wherein the elastomer comprises 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 comprises a guide cylinder and a radial supporting portion, the guide cylinder is inserted into the cylindrical base and a guide channel is formed inside the guide cylinder, one end of the fastener is fixed to the hub after passing through the guide channel, the biasing member pushes the radial supporting portion to abut against the second limiting portion, and further pushes the bridge plate to move in a direction away from the hub area until it stops after contacting the other end of the fastener, characterized in that 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.

2. The vibration damping system of the steering wheel according to claim 1, characterized in that: 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 moves toward the hub due to external force, the first axial protrusion can pass through the first notch and abut against the bridge plate.

3. The vibration damping system of the steering wheel according to claim 2, characterized in that: A plurality of first notches are formed on the radial outer contour of the second limiting portion, and elastic protrusions are formed between the first notches. The elastic protrusions extend toward the direction close to the first limiting portion to form a first axial protrusion.

4. The vibration damping system of the steering wheel according to claim 3, 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.

5. The vibration damping system of the steering wheel according to claim 2, characterized in that: A plurality of axial recesses are formed on one side of the second limiting portion close to the radial supporting portion, and the radial supporting 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.

6. The vibration damping system of the steering wheel according to claim 5, characterized in that: There are six first notches, and the six first notches divide the second limiting portion into six elastic protrusions. There are four first axial protrusions, and three second axial protrusions.

7. The vibration damping system of the steering wheel according to any one of claims 1 to 6, characterized in that: A plurality of second notches are formed in the radial inner contour of the first limiting portion. The second notches penetrate through both ends of the first limiting portion in the thickness direction and correspond to the plurality of elastic protrusions.

8. The vibration damping system of the steering wheel according to claim 7, characterized in that: A plurality of first protrusions are formed by extending inwardly of the cylindrical base toward the guide cylindrical portion, and the plurality of first protrusions vertically extend from the first limiting portions between the plurality of second notches toward the cylindrical base.

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 first limiting portion includes a plurality of elastic arms arranged at intervals, and the elastic arms correspond to the first notches respectively.

10. The vibration damping system of the steering wheel according to claim 9, characterized in that: The elastic protrusion extends toward the direction close to the first limiting portion to form a first axial protrusion, and the elastic arm extends toward the direction close to the second limiting portion to form a plurality of second axial protrusions.

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 profile of the second limiting portion, and elastic protrusions are formed between the first notches. The thickness of the elastic protrusions gradually decreases along a direction away from the cylindrical base.

12. The vibration damping system of the steering wheel according to claim 11, 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.

13. 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.

14. 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.

15. The vibration damping system of the steering wheel according to any one of claims 1-6 and 9-14, characterized in that: The damping system further includes a cover plate, and the guide cylinder portion is engaged with the cover plate disposed on the first limiting portion after passing through the cylindrical base portion.

16. The vibration damping system of the steering wheel according to claim 15, characterized in that: 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 sheets, and the plurality of arc-shaped elastic sheets extend outward to form claws, which press and fix the cover plate on the first limiting portion.

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