A frequency-adjustable damper and steering wheel damping system

Abstract

The embodiment of the present specification provides a frequency-adjustable damper and a steering wheel damping system, the damper comprising a sleeve and an elastic part molded on the outer circumferential side of the sleeve, the elastic part extending in a direction perpendicular to the axis of the sleeve to form a ring-shaped supporting part, a plurality of through grooves being formed on the ring-shaped supporting part, the damper being arranged in an opening of a mounting device, the opening having a wedge-shaped part with a gradually decreasing aperture, during the installation of the damper into the opening, the outer circumference of the ring-shaped supporting part is gradually extruded by the wedge-shaped part to plastically deform, and the frequency adjustment of the damper is realized by adjusting the final installation position of the damper. By forming a plurality of through grooves on the elastic part and forming an opening with a wedge-shaped part having a gradually decreasing aperture on the mounting device for mounting the damper, when the damper is installed, the elastic part is extruded by the wedge-shaped part in the circumferential direction to plastically deform, so that the frequency of the damper changes, and different frequency dampers are obtained by adjusting the final installation position of the damper.

Description

Technical Field

[0001] This specification relates to the field of automotive steering wheel technology, specifically to an adjustable frequency damper and a steering wheel damping system. Background Technology

[0002] Currently, the connection between the car steering wheel and the driver's side airbag is often achieved through a center clicker. The clicker and steering wheel frame are secured with bolts. A damping mechanism and spring are installed on the clicker; the damping function controls and buffers the vibrations generated by the airbag during vehicle operation. In existing technology, due to the different weights and shapes of DAB (driver's side airbags), the damping mechanisms matched to the clicker vary. To adjust for new resonant frequencies, a new damping structure generally needs to be developed. Summary of the Invention

[0003] In view of this, embodiments of this specification provide an adjustable frequency damper and a steering wheel damping system.

[0004] This specification provides the following technical solution through its embodiments: an adjustable frequency damper, comprising a sleeve and an elastic portion molded on the outer periphery of the sleeve, the elastic portion extending in a direction perpendicular to the axis of the sleeve to form an annular support portion, the annular support portion having a plurality of through slots, the damper being disposed in an opening of a mounting device, the opening having a wedge-shaped portion with a gradually decreasing aperture.

[0005] During the installation of the damper into the opening, the outer periphery of the annular support is gradually squeezed by the wedge-shaped part and undergoes plastic deformation, further compressing the through groove. The damping frequency is adjusted by adjusting the final installation position of the damper.

[0006] Preferably, the through groove extends in a direction parallel to the axial direction of the sleeve and penetrates the upper and lower surfaces of the annular support.

[0007] Preferably, the plurality of through slots are evenly distributed in the circumferential direction within the annular support portion, and the plurality of through slots are deflected in a clockwise or counterclockwise direction.

[0008] A steering wheel damping system includes a support plate, a clamping block, an adjusting nut, and a damper as described in any of the preceding claims, wherein...

[0009] The opening on the support plate is provided with several internal spline grooves and threaded protrusions in the circumferential direction. The threaded protrusions include a threaded portion facing the axis of the opening and a wedge-shaped structure located below the threaded portion. The bottom of the wedge-shaped structure gradually protrudes towards the axis of the opening.

[0010] The clamping block includes a connecting ring and a plurality of inner wedges extending to the same side of the connecting ring, which are placed in the opening, and the outer peripheries of the inner wedges respectively abut against the inner side of the wedge-shaped structure;

[0011] The damper further includes an overlapping portion disposed on the outer periphery of the annular support portion, placed in the opening, the overlapping portion being accommodated in the inner spline groove, and the inner periphery of the inner wedge block clamping the outer periphery of the annular support portion.

[0012] The adjusting nut is provided with an external thread that mates with the threaded portion, and is screwed into the opening to abut against the top of the inner wedge and / or the top of the annular support portion;

[0013] When the adjusting nut is rotated and pressed down, the inner wedge block gradually moves downward and is clamped to the outer periphery of the annular support by the inner top action of the wedge structure. The final position of the damper in the opening is adjusted by rotating and pressing down the adjusting nut, thereby realizing the adjustment of its damping frequency.

[0014] Preferably, the threaded protrusion and the internal spline groove are alternately arranged on the inner wall of the opening.

[0015] Preferably, the adjusting nut has a central opening, and a screw spline is provided on the upper surface of the adjusting nut along the central opening. The damping system further includes a locking ring plate, the outer ring surface of which is provided with a limiting external spline that cooperates with the inner spline groove, and the inner ring surface of the locking ring plate is provided with a limiting internal spline that cooperates with the screw spline.

[0016] Preferably, the damping system further includes a pan head screw, a spring, and a frame. The frame has a threaded groove that mates with the pan head screw. The threaded rod of the pan head screw passes sequentially through the limiting internal spline of the locking ring plate, the central opening of the adjusting nut, the sleeve of the damper, and the spring, and then mates with the threaded groove. The spring always pushes the support plate to move away from the frame until the locking ring plate abuts against the pan head portion of the pan head screw.

[0017] Preferably, the locking ring plate has a plurality of elastic limiting ribs on the side opposite to the pan head portion.

[0018] Preferably, the elastic limiting rib is a rod-shaped protrusion that extends obliquely upward from the top of the locking ring piece, and its end forms an elastic part that abuts against the pan head portion.

[0019] Preferably, the upper surface of the overlapping portion is provided with an upper limit rib, which abuts against the adjusting nut.

[0020] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0021] By designing an adjustable frequency damper, a sleeve and an elastic part molded on the outer periphery of the sleeve are used to form the damper. Several through slots are opened on the elastic part, and an opening with a wedge-shaped part with a gradually decreasing aperture is opened on the mounting device for installing the damper. When the damper is installed, the elastic part is plastically deformed by the wedge-shaped part in the circumferential direction, which further compresses the through slots, thereby changing the frequency of the damper. Dampers with different frequencies can be obtained by adjusting the final installation position of the damper. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded structural diagram of the steering wheel damping system provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the damper provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the support plate proposed in this invention;

[0026] Figure 4 This is a schematic diagram of the structure of the adjusting nut proposed in this invention;

[0027] Figure 5 This is a schematic diagram of the clamping block proposed in this invention;

[0028] Figure 6 This is a schematic diagram of the structure of the locking ring piece proposed in this invention;

[0029] Figure 7 This is a schematic diagram of the structure of the damper and adjusting nut proposed in this invention when they are installed inside the support plate;

[0030] Figure 8 This is a schematic diagram of the structure of the locking ring piece proposed in this invention when it is installed inside the support plate;

[0031] Figure 9 This is a cross-sectional view of the steering wheel damping system proposed in this invention after assembly.

[0032] In the diagram, 1 is the damper; 101 is the sleeve; 102 is the annular support; 103 is the through groove; 104 is the lap joint; 105 is the upper limit rib; 2 is the support plate; 201 is the opening; 202 is the threaded protrusion; 203 is the internal spline groove; 3 is the adjusting nut; 301 is the external thread; 302 is the screw spline; 4 is the clamping block; 401 is the connecting ring; 402 is the internal wedge block; 5 is the pan head screw; 6 is the spring; 7 is the skeleton; 8 is the locking ring plate; 801 is the limiting external spline; 802 is the limiting internal spline; 803 is the elastic limiting rib. Detailed Implementation

[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0034] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one 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 aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0036] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0038] Currently, a damping mechanism is generally required to be installed in the steering wheel of a car. The purpose of damping is to control and buffer the vibration generated by the airbag during the car's operation. Since the weight and shape of the driver's airbag in different car steering wheels are different, the style of the damping mechanism matched on the push-button is also different. In order to adjust the new resonance frequency, the existing dampers are difficult to adjust the frequency. Therefore, it is generally necessary to design dampers of different frequencies according to the actual situation, which leads to higher production costs.

[0039] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0040] like Figures 1-3 As shown, an adjustable frequency damper 1 includes a sleeve 101 and an elastic portion molded on the outer periphery of the sleeve 101. The elastic portion extends in a direction perpendicular to the axis of the sleeve 101 to form an annular support portion 102. The annular support portion 102 has a plurality of through slots 103. By having through slots 103 on the annular support portion 102, when the outer periphery of the annular support portion 102 is compressed, the annular support portion 102 undergoes plastic deformation due to the presence of through slots 103. The compression groove 103 causes the frequency of the damper 1 to change. The damper 1 is disposed in the opening 201 of the mounting device. The opening 201 has a wedge-shaped portion with a gradually decreasing aperture. By providing a wedge-shaped portion with a gradually decreasing aperture in the opening 201 of the mounting device, when the damper 1 is installed in the opening 201, as the damper 1 moves in the opening 201, the wedge-shaped portion squeezes the damper 1, causing it to undergo plastic deformation, thereby changing the damping frequency of the damper 1.

[0041] During the installation of the damper 1 into the opening 201, the outer periphery of the annular support 102 is gradually squeezed by the wedge-shaped part and undergoes plastic deformation, further compressing the through groove 103. The damping frequency can be adjusted by adjusting the final installation position of the damper 1. It can be used in steering wheels of different modules, is easy to produce on a platform, and reduces the cost of developing a single damper.

[0042] It should be noted that when the elastic part is described as "molded" in the sleeve, it should be interpreted as the relevant component being directly formed / molded on the sleeve. The sleeve provides support for the elastic part, and its interior also guides the through-piece. The elastic part includes silicone rubber. In this embodiment, the elastic part is preferably a combination of nylon or polyoxymethylene and EPDM or silicone inserts via injection molding to ensure that the elastic part can easily undergo plastic deformation when subjected to the compression of the wedge-shaped part.

[0043] Furthermore, the through groove 103 extends in a direction parallel to the axis of the sleeve 101 and penetrates the upper and lower surfaces of the annular support portion 102. By providing the through groove 103 that penetrates the upper and lower surfaces of the annular support portion 102, the annular support portion 102 is made to undergo plastic deformation when the outer circumference of the annular support portion 102 is squeezed by the wedge-shaped portion, thereby changing the frequency of the damper 1.

[0044] Furthermore, the plurality of through grooves 103 are evenly distributed in the circumferential direction within the annular support portion 102. By evenly distributing the plurality of through grooves 103 in the circumferential direction within the annular support portion 102, when the outer circumference of the annular support portion 102 is subjected to the squeezing action of the wedge-shaped portion, the plastic deformation generated by the annular support portion 102 is more uniform, thereby facilitating the change of the frequency of the damper 1. The plurality of through grooves 103 are deflected in a clockwise or counterclockwise direction, and the plurality of through grooves 103 are oriented in the same direction, which facilitates further compression of the through grooves 103.

[0045] It should be noted that in this embodiment, the orientation of the plurality of through grooves 103 is deflected counterclockwise. When the outer circumference of the annular support portion 102 is compressed, the plastic deformation generated by the annular support portion 102, since the plurality of through grooves 103 are all deflected counterclockwise, causes the annular support portion 102 to deform along the orientation of the plurality of through grooves 103, resulting in uniform deformation around the annular support portion 102. This facilitates the compression of the through grooves 103, thereby changing the damping frequency of the damper 1. In other embodiments, the orientation of the plurality of through grooves may also be deflected clockwise.

[0046] like Figures 1-9 As shown, based on the same inventive concept, this specification provides a steering wheel damping system, including a support plate 2 (i.e., mounting device), a clamping block 4, an adjusting nut 3, and a damper as described in any of the above embodiments, wherein,

[0047] The support plate 2 has an opening 201. The opening 201 on the support plate 2 has several internal spline grooves 203 and threaded protrusions 202 in the circumferential direction. The threaded protrusion 202 includes a threaded part facing the axis of the opening and a wedge-shaped structure located below the threaded part. The bottom structure of the wedge-shaped structure gradually protrudes towards the axis of the opening 201, that is, the lower part of the threaded protrusion 202 gradually approaches the damper 1.

[0048] The clamping block 4 includes a connecting ring 401 and a plurality of inner wedges 402 extending to the same side of the connecting ring 401. The clamping block 4 is placed in the opening 201, and the outer periphery of the inner wedges 402 respectively abuts against the inner side of the wedge-shaped structure.

[0049] The damper 1 also includes an overlapping portion 104 disposed on the outer periphery of the annular support portion 102. The damper 1 is placed in the opening 201, and the overlapping portion 104 is accommodated in the inner spline groove 203. The inner spline groove 203 can limit the damper 1, so that the damper 1 can only move in the vertical direction, preventing the damper 1 from rotating. The inner periphery of the inner wedge block 402 is clamped on the outer periphery of the annular support portion 102, and the inner wedge block 402 is located between two adjacent overlapping portions 104.

[0050] The adjusting nut 3 is provided with an external thread 301 that mates with the threaded portion. The adjusting nut 3 is screwed into the opening 201 and abuts against the top of the inner wedge block 402 and / or the top of the annular support portion 102.

[0051] When the adjusting nut 3 is rotated and pressed down, the inner wedge block 402 gradually moves downward and is clamped to the outer periphery of the annular support 102 by the inner top action of the wedge structure. The final position of the damper 1 in the opening is adjusted by rotating and pressing down the adjusting nut 3, thereby realizing the adjustment of its damping frequency.

[0052] By rotating the adjusting nut 3, the external thread 301 of the adjusting nut 3 engages with the threaded portion of the upper part of the threaded protrusion 202. The adjusting nut 3 moves downward, pressing the clamping block 4 downward. The outer periphery of the inner wedge block 402 contacts the wedge-shaped structure at the lower part of the threaded protrusion 202. As the wedge-shaped structure gradually approaches the damper 1, when the clamping block 4 moves downward, the wedge-shaped structure of the threaded protrusion 202 presses the inner wedge block 402 towards the damper 1. The inner wedge block 402 squeezes the damper 1. Since there is a through groove 103 on the damper 1, the annular support portion 102 of the damper 1 undergoes plastic deformation, compressing the through groove 103, thus changing the frequency of the damper 1.

[0053] It should be noted that in other embodiments, the clamping block 4 may not be provided. The damper 1 can be pushed downward by adjusting the nut 3, and the threaded protrusion 202 directly squeezes the damper 1, causing the damper 1 to undergo plastic deformation, thereby changing the frequency of the damper 1.

[0054] like Figures 1-3As shown, in some embodiments, the threaded protrusion 202 and the inner spline groove 203 are alternately arranged on the inner wall of the opening 201. By alternately arranging the threaded protrusion 202 and the inner spline groove 203, the overlapping part 104 of the damper 1 is accommodated in the inner spline groove 203, which can limit the damper 1 and prevent the damper 1 from rotating. When the adjusting nut 3 moves downward along the threaded protrusion 202, the adjusting nut 3 pushes the clamping block 4 downward. The lower part of the threaded protrusion 202 squeezes the inner wedge block 402, and the inner wedge block 402 deforms towards the damper 1, squeezing the damper 1 and causing the damper 1 to undergo plastic deformation.

[0055] like Figures 1-5 As shown, in some embodiments, a plurality of inner wedges 402 correspond to a plurality of threaded protrusions 202 respectively. By correspondingly arranging the plurality of inner wedges 402 and the plurality of threaded protrusions 202, when the clamping block 4 moves downward, the threaded protrusions 202 can squeeze the inner wedges 402, causing them to deform toward the damper 1, thereby achieving the squeezing of the damper 1.

[0056] It should be noted that in this embodiment, the inner wedges 402 and the threaded protrusions 202 are arranged in a one-to-one correspondence, so that each inner wedge 402 will be squeezed by the threaded protrusions 202, which makes it easier for the inner wedges 402 to apply a more uniform force to the damper 1.

[0057] like Figures 1-4 As shown, in some embodiments, the adjusting nut 3 has a central opening, and a screw spline 302 is provided on the upper surface of the adjusting nut 3 along the central opening. The screw spline 302 facilitates screwing the adjusting nut 3. The damping system also includes a locking ring plate 8. A limiting external spline 801 is provided on the outer ring surface of the locking ring plate 8, and the limiting external spline 801 cooperates with the inner spline groove 203. A limiting internal spline 801 is provided on the inner ring surface of the locking ring plate 8. 02. The limiting inner spline 802 cooperates with the screw spline 302. By setting a locking ring plate 8, and setting a limiting outer spline 801 that cooperates with the inner spline groove 203 on the outer ring surface of the locking ring plate 8, and setting a limiting inner spline 802 that cooperates with the screw spline 302 on the inner ring surface of the locking ring plate 8, the mutual limiting between the adjusting nut 3, the support plate 2 and the locking ring plate 8 can be realized, and relative rotation between the adjusting nut 3, the support plate 2 and the locking ring plate 8 can be avoided.

[0058] like Figure 1 and Figure 9As shown, in some embodiments, the damping system further includes a pan head screw 5, a spring 6, and a frame 7. The frame 7 has a threaded groove that mates with the pan head screw 5. The threaded rod of the pan head screw 5 passes sequentially through the limiting inner spline 802 of the locking ring 8, the central opening of the adjusting nut 3, the sleeve 101 of the damper 1, and the spring 6, and then mates with the threaded groove. The spring 6 is disposed between the frame 7 and the support plate 2. The spring 6 always pushes the support plate 2 away from the frame 7 until the locking ring 8 abuts against the pan head portion of the pan head screw 5. The support plate 2 and the frame 7 are fixed by the pan head screw 5, thus completing the fixation of components such as the locking plate, adjusting nut 3, damper 1, and clamping block 4. By placing the spring 6 between the frame 7 and the support plate 2, the spring 6 can play a buffering role.

[0059] like Figures 1-6 As shown, in some embodiments, the locking ring plate 8 has an elastic limiting rib 803 on the side opposite to the pan head portion. Several elastic limiting ribs 803 are evenly arranged on the top of the locking ring plate 8. By setting the elastic limiting rib 803 on the top of the locking ring plate, the adjusting nut 3 can be absorbed due to the different depth of the Z-direction (i.e., screwing into the opening 201) so that it is always in contact with the pan head screw 5. At the same time, it can also reduce the impact load of the pan head screw 5 and the clicker on bumpy roads and reduce noise.

[0060] Furthermore, the elastic limiting rib 803 is a rod-shaped protrusion that extends obliquely upward from the top of the locking ring piece 8, and its end forms an elastic part that abuts against the pan head portion. By setting the elastic limiting rib 803 as an upwardly diffracting rod-shaped protrusion, the elastic part at the end of the elastic limiting rib 803 abuts against the pan head portion, which can play a buffering role for the pan head portion.

[0061] like Figure 2 As shown, in some embodiments, the upper surface of the overlapping portion 104 is provided with an upper limit rib 105, which abuts against the adjusting nut 3. By providing the upper limit rib 105 on the upper surface of the overlapping portion 104, the upper limit rib 105 can play a buffering role between the adjusting nut 3 and the overlapping portion 104.

[0062] It should be noted that in this embodiment, each lap joint 104 is provided with an upper limit rib 105. In other embodiments, at least three lap joints 104 can be provided with limit ribs to ensure that the limit ribs are evenly distributed.

[0063] Please see Figures 1-9 The specific usage process of the damping system will be explained below:

[0064] The clamping block 4 is placed in the opening 201 of the support plate 2, so that there is a one-to-one correspondence between the inner wedges 402 and the threaded protrusions 202. The damper 1 is then placed in the damper, and the overlapping part 104 is accommodated in the inner spline groove 203. The inner circumference of the inner wedge 402 is clamped on the outer circumference of the annular support part 102. The inner wedge 402 is located between two adjacent overlapping parts 104. By rotating the adjusting nut 3, the external thread 301 of the adjusting nut 3 engages with the thread on the upper part of the threaded protrusion 202. As the adjusting nut 3 moves downward, it presses the clamping block 4 downward. The outer periphery of the inner wedge 402 contacts the lower part of the threaded protrusion 202. As the lower part of the threaded protrusion 202 gradually approaches the damper 1, when the clamping block 4 moves downward, the threaded protrusion 202 presses the inner wedge 402 towards the damper 1. The inner wedge 402 squeezes the damper 1. Because there is a through groove 103 on the damper 1, the annular support part 102 of the damper 1 undergoes plastic deformation, compressing the through groove. 103, which changes the frequency of damper 1. The damping frequency is adjusted by adjusting the final installation position of damper 1. It can be used in steering wheels of different modules. After the damping frequency of damper 1 is adjusted, locking ring plate 8 is placed into opening 201. Limiting external spline 801 cooperates with internal spline groove 203, and limiting internal spline 802 cooperates with screwing spline 302 to realize mutual limiting between adjusting nut 3, support plate 2 and locking ring plate 8. The support plate 2 and frame 7 are fixed by pan head screw 5 to complete the fixing of components such as locking plate, adjusting nut 3, damper 1 and clamping block 4. The lower surface of the plate-shaped screwing part at the top of pan head screw 5 is in contact with elastic limiting rib 803. Elastic limiting rib 803 can absorb the different depth of adjusting nut 3 in the Z direction (i.e. screwing into opening 201) so that it is always in contact with pan head screw 5. At the same time, it can also reduce the impact load of pan head screw 5 and sound plate on bumpy roads and reduce noise.

[0065] The various embodiments in this specification can be referred to interchangeably for the same or similar parts. Each embodiment focuses on describing the differences from other embodiments. In particular, the method embodiments described later are relatively simple in description since they correspond to the system, and relevant parts can be referred to the descriptions in the system embodiments.

[0066] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A frequency-adjustable damper, characterized in that, The device includes a sleeve and an elastic portion molded on the outer periphery of the sleeve. The elastic portion extends in a direction perpendicular to the axis of the sleeve to form an annular support portion. The annular support portion has several through slots. The damper is disposed in the opening of the mounting device, and the opening has a wedge-shaped portion with a gradually decreasing diameter. During the installation of the damper into the opening, the outer periphery of the annular support is gradually squeezed by the wedge-shaped part and undergoes plastic deformation, further compressing the through groove. The damping frequency is adjusted by adjusting the final installation position of the damper.

2. The adjustable frequency damper according to claim 1, characterized in that, The through groove extends in a direction parallel to the axis of the sleeve and penetrates the upper and lower surfaces of the annular support.

3. The adjustable frequency damper according to claim 1, characterized in that, The through slots are evenly distributed in the circumferential direction within the annular support portion, and the through slots are deflected in a clockwise or counterclockwise direction.

4. A steering wheel damping system, characterized in that, It includes a support plate, a clamping block, an adjusting nut, and a damper as described in any one of claims 1-3, wherein, The opening on the support plate is provided with several internal spline grooves and threaded protrusions in the circumferential direction. The threaded protrusions include a threaded portion facing the axis of the opening and a wedge-shaped structure located below the threaded portion. The bottom of the wedge-shaped structure gradually protrudes towards the axis of the opening. The clamping block includes a connecting ring and a plurality of inner wedges extending to the same side of the connecting ring, which are placed in the opening, and the outer peripheries of the inner wedges respectively abut against the inner side of the wedge-shaped structure; The damper further includes an overlapping portion disposed on the outer periphery of the annular support portion, placed in the opening, the overlapping portion being accommodated in the inner spline groove, and the inner periphery of the inner wedge block clamping the outer periphery of the annular support portion. The adjusting nut is provided with an external thread that mates with the threaded portion, and is screwed into the opening to abut against the top of the inner wedge and / or the top of the annular support portion; When the adjusting nut is rotated and pressed down, the inner wedge block gradually moves downward and is clamped to the outer periphery of the annular support by the inner top action of the wedge structure. The final position of the damper in the opening is adjusted by rotating and pressing down the adjusting nut, thereby realizing the adjustment of its damping frequency.

5. The steering wheel damping system according to claim 4, characterized in that, The threaded protrusion and the internal spline groove are alternately arranged on the inner wall of the opening.

6. The steering wheel damping system according to claim 4, characterized in that, The adjusting nut has a central opening, and a screw spline is provided on the upper surface of the adjusting nut along the central opening. The damping system also includes a locking ring plate. The outer ring surface of the locking ring plate is provided with a limiting external spline, which cooperates with the inner spline groove. The inner ring surface of the locking ring plate is provided with a limiting internal spline, which cooperates with the screw spline.

7. The steering wheel damping system according to claim 6, characterized in that, The damping system also includes a pan head screw, a spring, and a frame. The frame has a threaded groove that mates with the pan head screw. The threaded rod of the pan head screw passes sequentially through the limiting internal spline of the locking ring plate, the central opening of the adjusting nut, the sleeve of the damper, and the spring, and then mates with the threaded groove. The spring always pushes the support plate away from the frame until the locking ring plate abuts against the pan head portion of the pan head screw.

8. The steering wheel damping system according to claim 7, characterized in that, The locking ring plate has several elastic limiting ribs on the side opposite to the pan head portion.

9. The steering wheel damping system according to claim 8, characterized in that, The elastic limiting rib is a rod-shaped protrusion that extends obliquely upward from the top of the locking ring piece, and its end forms an elastic part that abuts against the pan head portion.

10. The steering wheel damping system according to claim 7, characterized in that, The upper surface of the lap joint is provided with an upper limit rib, which abuts against the adjusting nut.

Images