Low-cost steering wheel

Abstract

The low-cost steering wheel is applied to the technical field of steering wheels and is characterized in that a pin body of a positioning pin is inserted into a framework hole of a hub area, the positioning pin is fixed to the hub area through the head and a pin piece of the positioning pin, and a limiting ring body is arranged between the framework hole and the positioning pin; the anti-rotation positioning column is inserted into the anti-rotation positioning groove in the axis direction of the annular base portion of the limiting ring body, the head portion is opposite to the annular base portion, and the head portion abuts against the hub area through the annular base portion, so that movement of the positioning pin on the steering wheel framework is greatly reduced and can be effectively reduced. And even noise and abnormal sound between the positioning pins and the steering wheel framework when a vehicle passes through a bumpy road surface are avoided, the comfort level of a driver is improved, and the steering wheel is low in cost.

Description

Technical Field

[0001] This application relates to the technical field of steering wheels, and particularly relates to a low-cost steering wheel. Background Art

[0002] In the prior art, the connection method between the driver airbag and the steering wheel is mainly that the hook pin on the driver airbag and the retaining spring wire of the steering wheel are mutually clamped. Since an assembly gap needs to be left between the retaining spring wire of the steering wheel and the metal skeleton of the steering wheel, collision noises are likely to occur between the retaining spring wire and the steering wheel skeleton when the vehicle passes through a bumpy road surface, thereby causing discomfort to the driver.

[0003] Based on this, a new technical solution is needed. Utility Model Content

[0004] In view of this, the embodiments of this specification provide a low-cost steering wheel.

[0005] The embodiments of this specification provide the following technical solutions:

[0006] A low-cost steering wheel provided by the embodiments of this specification includes a steering wheel skeleton, a positioning pin, and a pin piece. A skeleton hole is provided in the hub area of the steering wheel skeleton. The positioning pin includes a pin body and a head. The pin body is inserted into the skeleton hole from one side of the hub area, and the pin piece is clamped on the pin body on the other side of the hub area. The head and the pin piece respectively form limiting structures of the positioning pin on both sides of the hub area.

[0007] A limiting ring body is provided between the skeleton hole and the positioning pin. The limiting ring body includes an annular base and an anti-rotation positioning column extending in a direction parallel to the axis of the annular base. An anti-rotation positioning groove is provided in the skeleton hole. When in the installation position, the anti-rotation positioning column is embedded into the anti-rotation positioning groove, and the annular base is opposite to the head.

[0008] Preferably, a catch is further fixed on the upper inner side of the annular base. The catch includes a main body portion extending in a direction parallel to the axis of the annular base and a hook portion extending from the main body portion toward the outer side of the annular base. A limiting groove is recessed inward from the other side of the hub area in the skeleton hole. The main body portion is inserted into the skeleton hole, and the hook portion hooks the limiting groove. The hook portion and the annular base respectively form limiting structures of the limiting ring body on both sides of the hub area.

[0009] Preferably, a positioning rib parallel to the axial direction of the skeleton hole is provided on the surface of the anti-rotation positioning column that abuts against the anti-rotation positioning groove;

[0010] And / or, an inner protrusion parallel to the axial direction of the pin body is provided on the surface of the anti-rotation positioning column that abuts against the pin body.

[0011] Preferably, the number of the anti-rotation positioning columns is at least three, and a plurality of the anti-rotation positioning columns are fixed to the inner side of the annular base and distributed along the circumferential direction of the annular base. A plurality of the anti-rotation positioning columns respectively abut against the corresponding anti-rotation positioning grooves through positioning ribs, and the pin body is inserted into the annular base and abuts and is restricted between the inner protrusions of the plurality of anti-rotation positioning columns;

[0012] A plurality of the anti-rotation positioning columns are arranged with different wall thicknesses, and / or a plurality of the anti-rotation positioning columns are asymmetrically distributed along the circumferential direction of the annular base;

[0013] A plurality of the hooks are provided, and a plurality of the hooks are distributed along the circumferential direction of the annular base, and a plurality of the hook portions respectively hook the corresponding limiting grooves.

[0014] Preferably, a plurality of the hooks and a plurality of the anti-rotation positioning columns are distributed at intervals along the circumferential direction of the annular base; reinforcing structures extending in a direction parallel to the axis of the annular base are formed on both sides of the anti-rotation positioning columns on the annular base, and the reinforcing structures are inserted into the skeleton holes; a groove-shaped structure facilitating the deformation of the hooks is formed between the hooks and the reinforcing structures on the annular base, and a hole-shaped structure penetrating in a direction parallel to the axis of the annular base is provided at a position on the annular base opposite to the hook portion.

[0015] Preferably, the low-cost steering wheel further includes an airbag housing. A hanging hook opening is formed in a region of the pin body away from the head, a hanging hook rod is installed on the airbag housing, and the hanging hook opening is hooked to the hanging portion of the hanging hook rod;

[0016] A limiting block is formed at a part of the edge of the lower outer side of the annular base, and the limiting block and another part of the edge of the lower outer side of the annular base form a limiting notch; a positioning notch is provided at a part of the edge of the outer side of the head, and the positioning notch makes another part of the edge of the outer side of the head form a positioning block, and the positioning block is clamped with the limiting notch so that the hanging hook opening is hooked to the hanging portion in a fixed direction.

[0017] Preferably, a plurality of the skeleton holes are arranged around the center of the hub region, the hanging hook rod is bent, so that the hanging portions are distributed following the skeleton holes, and the fixed direction distributions of a plurality of the hanging hook openings are arranged to adapt to the rod length directions of the corresponding hanging portions.

[0018] Preferably, a buffer gasket is abutted between the head and the annular base.

[0019] Preferably, the pin piece is formed into a sheet-like structure that exceeds a semi-circular ring circumferentially around a part of the pin body. The pin piece forms an opening circumferentially around another part of the pin body. Guide bevels are formed at positions on both opposite side walls of the opening close to the outside of the pin piece. The two guide bevels are arranged symmetrically in an open-mouthed shape in the direction from the inside of the pin piece to the outside of the pin piece. The inside of the pin piece is deformed and clamped into a clamping groove on the circumference of the pin body through the opening.

[0020] Preferably, a plurality of convex portions that abut against the clamping groove are formed on the circumference of the inside of the pin piece; concave portions for facilitating the deformation of the pin piece are formed on both sides of the convex portions on the circumference of the inside of the pin piece. The convex portions and the concave portions form a gear-like structure distributed along the circumference of the inside of the pin piece.

[0021] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of this specification at least include:

[0022] This application does not adopt the solution of using a retaining spring wire of an airbag pin to hook the steering wheel in the prior art, and there is no collision noise between the retaining spring wire and the steering wheel skeleton. Instead, the pin body of the positioning pin is inserted into the skeleton hole, and the positioning pin is fixed in the hub area through the head and the pin piece of the positioning pin. A limiting ring body is provided between the skeleton hole and the positioning pin. When in the installation position, the anti-rotation positioning post is inserted into the anti-rotation positioning groove along the axis direction of the annular base of the limiting ring body, and the head and the annular base are opposite. The head abuts against the hub area through the annular base, greatly reducing the movement of the positioning pin on the steering wheel skeleton, effectively reducing, or even avoiding, the noise between the positioning pin and the steering wheel skeleton when the vehicle passes through a bumpy road surface, improving the comfort of the driver, and the cost of this steering wheel is relatively low. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a cross-sectional view of the overall structure of the low-cost steering wheel of this application;

[0025] Figure 2 is an exploded view of the low-cost steering wheel of this application;

[0026] Figure 3 is a schematic diagram of this application highlighting the positions of the positioning block and the limiting notch relative to the skeleton hole;

[0027] Figure 4It is a schematic diagram of the present application for highlighting the distribution position of the hanging rod relative to the skeleton hole;

[0028] Figure 5 It is a schematic diagram of the structure of the hub area of the steering wheel skeleton in the present application;

[0029] Figure 6 It is a schematic diagram of the structure of the limiting ring inserted into the skeleton hole in the present application;

[0030] Figure 7 It is a schematic diagram of the structure of the limiting ring in the present application;

[0031] Figure 8 It is a schematic diagram of the structure of the positioning pin in the present application;

[0032] Figure 9 It is a schematic diagram of the structure of the pin piece in the present application.

[0033] Reference numerals: 1, steering wheel skeleton; 11, skeleton hole; 12, anti-rotation positioning groove; 121, positioning groove side wall; 13, limiting groove; 131, limiting groove bottom wall; 2, limiting ring; 21, anti-rotation positioning column; 211, positioning rib; 212, convex rib; 22, hook; 23, groove-like structure; 24, limiting notch; 3, buffer gasket; 4, positioning pin; 41, positioning block; 42, card slot; 421, card slot side wall; 43, pin body; 44, opening; 45, head; 5, pin piece; 51, guiding bevel edge; 52, convex part; 53, concave part; 6, sounding component; 7, airbag; 71, hanging rod. Detailed implementation manners

[0034] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] The following illustrates the implementation manners of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content 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 manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0036] It should be noted that the following description relates to various aspects of embodiments within the scope of the appended claims. It will 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 illustrative only. Based on this application, those skilled in the art should 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 a device and / or practice a method. Additionally, this device and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0037] It should also be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of this application. Only the components related to this application are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the layout type of its components may also be more complex.

[0038] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that these examples can be practiced without these specific details.

[0039] Through in - depth research and improvement exploration of the steering wheel and the connection structure between the steering wheel skeleton and the airbag, the applicant found that: due to the assembly gap between the steering wheel retaining ring wire and the steering wheel metal skeleton, when the vehicle passes over a bumpy road surface, it is easy to have a collision noise between the wire and the steering wheel skeleton, which in turn causes discomfort to the driver. There are also some structures that solve the noise problem through damping and noise reduction (Damper), but adding a damping Damper will significantly increase the part cost, and a larger safety gap between the steering wheel and the airbag is required to avoid the failure of the Damper function, which has relatively high requirements for the styling space of the steering wheel.

[0040] Based on this, the following combines the drawings to illustrate the technical solutions provided by each embodiment of this application.

[0041] An embodiment of this specification proposes a low - cost steering wheel, such as Figure 1 、 Figure 5 and Figure 8As shown in the figure, it includes a steering wheel skeleton 1, a positioning pin 4 and a pin piece 5. A skeleton hole 11 is provided in the hub area of the steering wheel skeleton 1. The positioning pin 4 includes a pin body 43 and a head 45. The pin body 43 is inserted into the skeleton hole 11 from one side of the hub area, and the pin piece 5 is clamped onto the pin body 43 on the other side of the hub area. The head 45 and the pin piece 5 respectively form a limiting structure of the positioning pin 4 on both sides of the hub area. Among them, one side of the hub area is the side of the hub area close to the bottom of the vehicle, and the other side of the hub area is the side of the hub area close to the top of the vehicle. The positioning pin 4 can be called an axial positioning pin.

[0042] As Figure 1 , Figure 5 and Figure 7 shown, a limiting ring body 2 is provided between the skeleton hole 11 and the positioning pin 4. The limiting ring body 2 includes an annular base 25 and an anti-rotation positioning column 21 extending in a direction parallel to the axis of the annular base 25. The skeleton hole 11 is provided with an anti-rotation positioning groove 12. When in the installation position, the anti-rotation positioning column 21 is embedded into the anti-rotation positioning groove 12, and the annular base 25 is opposite to the head 45. Among them, the skeleton hole 11 can be a positioning step. The outer hole of the positioning step is arranged on the side close to the hub area, and the inner hole of the positioning step is arranged on the other side close to the hub area. The annular base 25 abuts against the step surface between the inner and outer holes of the positioning step, so that the head 45 and the annular base 25 can be located in the outer hole of the positioning step, and the surface where the head 45 is located on one side of the hub area does not protrude. The steering wheel skeleton 1 is designed with a positioning step to prevent the Z-directional movement of the limiting ring body 2 and the positioning pin 4, where Z represents the axial direction.

[0043] In one embodiment, as Figure 5 , Figure 6 and Figure 7 shown, a hook 22 is also fixed on the upper inner side of the annular base 25. The hook 22 includes a main body portion extending in a direction parallel to the axis of the annular base 25 and a hook portion extending from the main body portion toward the outside of the annular base 25. The skeleton hole 11 is recessed inward from the other side of the hub area to form a limiting groove 13. The main body portion is inserted into the skeleton hole 11, and the hook portion hooks the limiting groove 13. The hook portion and the annular base 25 respectively form a limiting structure of the limiting ring body 2 on both sides of the hub area. In addition, the hook portion is located in the limiting groove 13, and the hook portion abuts against the bottom wall 131 of the limiting groove to prevent the pin piece 5 from abutting against the other side of the hub area.

[0044] In one embodiment, as Figure 5 and Figure 7 shown, a plurality of positioning ribs 211 parallel to the axis of the skeleton hole 11 are provided on the surface of the anti-rotation positioning column 21 that abuts against the anti-rotation positioning groove 12; the outer circumference of the anti-rotation positioning column 21 is circumferentially provided with positioning ribs 211 to cooperate with the positioning groove side wall 121 of the anti-rotation positioning groove 12 on the steering wheel skeleton 1, so as to avoid shaking and abnormal noise caused by surface-to-surface contact.

[0045] and / or, as Figure 7 and Figure 8 shown, on the surface of the anti-rotation positioning post 21 that abuts against the pin body 43, there are inner protrusions parallel to the axial direction of the pin body 43, and the inner protrusions are located on both sides of the surface of the anti-rotation positioning post 21 that abuts against the pin body 43 along the circumferential direction of the pin body 43. On the surface where the inner protrusions abut against the pin body 43, there are ribbed protrusions 212 parallel to the axial direction of the pin body 43. The ribbed protrusions 212 are arranged on the circumferential side wall of the inner circle of the anti-rotation positioning post 21 to cooperate with the side wall of the pin body 43 of the positioning pin 4.

[0046] In one embodiment, as Figure 7 and Figure 8 shown, the number of the anti-rotation positioning posts 21 is at least three, and the multiple anti-rotation positioning posts 21 are fixed inside the annular base 25 and distributed along the circumferential direction of the annular base 25. The multiple anti-rotation positioning posts 21 respectively abut against the corresponding anti-rotation positioning grooves 12 through the positioning ribs 211, and the pin body 43 is inserted into the annular base 25 and abuts and is restricted between the inner protrusions of the multiple anti-rotation positioning posts 21. The multiple anti-rotation positioning posts 21 are set with different wall thicknesses, and / or, the multiple anti-rotation positioning posts 21 are asymmetrically distributed along the circumferential direction of the annular base 25. A number of anti-rotation positioning grooves 12 are provided on the steering wheel skeleton 1 to cooperate with the anti-rotation positioning posts 21 on the limiting ring body 2 to prevent the rotation of the limiting ring body 2. The number of the anti-rotation positioning posts 21 is usually greater than 3 and designed with non-uniform wall thickness and asymmetry, having the functions of positioning and anti-misalignment, so that the limiting ring body 2 can only be assembled on the steering wheel skeleton 1 at a specific angle.

[0047] As Figure 5 and Figure 7 shown, a plurality of hooks 22 are provided, and the plurality of hooks 22 are evenly distributed along the circumferential direction of the annular base 25, and the plurality of hook parts respectively hook the corresponding limiting grooves 13. For example, the anti-rotation positioning posts 21 and the hooks 22 are provided in three. A number of hooks 22 are provided on the limiting ring body 2 to cooperate with the limiting grooves 13 on the steering wheel skeleton 1.

[0048] In one embodiment, as Figure 5 and Figure 7 shown, the multiple hooks 22 and the multiple anti-rotation positioning posts 21 are spaced apart along the circumferential direction of the annular base 25; on both sides of the anti-rotation positioning post 21 on the annular base 25, there are reinforcing structures extending in the direction parallel to the axis of the annular base 25, and the reinforcing structures are inserted into the skeleton holes 11; between the hook 22 and the reinforcing structure on the annular base 25, there is a groove-like structure 23 facilitating the deformation of the hook 22, and at the position on the annular base 25 opposite to the hook part, there is a hole-like structure penetrating in the direction parallel to the axis of the annular base 25. That is, groove-like structures 23 are provided on both sides of the hook 22 to facilitate the assembly and deformation of the hook 22, aiming to make the hook 22 easier to deform during assembly.

[0049] In one embodiment, asFigure 1 , Figure 4 and Figure 8 As shown in ,

[0050] , the low-cost steering wheel further includes an airbag housing. A hook opening is provided in the area of the pin body 43 away from the head 45. A hook rod 71 is installed on the airbag housing, and the hook opening is hooked to the hooked part of the hook rod 71. The hook rod 71 can be an airbag wire.

[0050] As Figure 3 , Figure 7 and Figure 8 shown, a limiting block is formed at a part of the lower outer edge of the annular base 25, and the limiting block and another part of the lower outer edge of the annular base 25 form a limiting notch 24; a positioning notch is provided at a part of the outer edge of the head 45, and the positioning notch makes the other part of the outer edge of the head 45 form a positioning block 41. The positioning block 41 is clamped in the limiting notch 24 so that the hook opening is hooked to the hooked part in a fixed direction. That is, a limiting notch 24 is designed at the bottom of the limiting ring body 2 to cooperate with the positioning block 41 at the bottom of the positioning pin 4, avoiding the rotation of the positioning pin 4, thereby avoiding affecting the clamping assembly of the airbag 7 and the steering wheel and avoiding abnormal noise.

[0051] In one embodiment, as Figure 4 shown, a plurality of skeleton holes 11 are arranged around the center of the hub area. The hook rod 71 is bent so that the hooked part is distributed following the skeleton holes 11, and the fixed direction distribution of the plurality of hook openings is arranged to adapt to the rod length direction of the corresponding hooked part. For example, the skeleton holes 11 are arranged in four.

[0052] In one embodiment, as Figure 1 shown, a buffer gasket 3 is abutted between the head 45 and the annular base 25. The buffer gasket 3 is in the shape of a circular ring sheet, and the pin body 43 is axially inserted into the inner side of the buffer gasket 3. That is, there is a buffer gasket 3 between the positioning pin 4 and the limiting ring body 2, and the material is a soft material such as rubber, avoiding collision abnormal noise between the positioning pin 4 and the limiting ring body 2 during the driving of the vehicle.

[0053] In one embodiment, as Figure 8 and Figure 9 shown, the pin piece 5 is formed into a sheet-like structure exceeding a semi-circular ring in a part of the circumference around the pin body 43. The pin piece 5 forms an opening 44 in another part of the circumference of the pin body 43. Guide bevels 51 are formed at the parts of the two opposite side walls of the opening 44 close to the outer side of the pin piece 5, and the two guide bevels 51 are arranged in a flaring shape and symmetrically from the inner side of the pin piece 5 to the outer side of the pin piece 5. The inner side of the pin piece 5 is clamped in the card slot 42 on the circumference of the pin body 43 through the deformation of the opening 44. The pin piece 5 can be called an opening positioning pin piece.

[0054] In one embodiment, a plurality of convex portions 52 that abut against the card slots 42 are formed on the inner circumference of the pin piece 5; concave portions 53 facilitating the deformation of the pin piece 5 are formed on both sides of the convex portions 52 on the inner circumference of the pin piece 5, and the convex portions 52 and the concave portions 53 form a gear-shaped structure distributed along the inner circumference of the pin piece 5. The pin piece 5 is a sheet-like structure exceeding a semi-circle, and the opening 44 is provided with an inclined angle conducive to assembly guidance. It is fixedly connected in the card slot 42 of the positioning pin 4 through clamping, thereby restricting the movement of the shaft positioning pin 4. A number of circumferentially distributed gear-shaped convex portions 52 and concave portions 53 are designed on the inner ring of the pin piece 5. Among them, the convex portion 52 is positioned with the side wall 421 of the card slot of the positioning pin 4, which is more conducive to positioning, while the concave portion 53 is for the elastic piece to be more easily deformed and assembled during the clamping process, reducing the assembly force.

[0055] In this application, the gap between the positioning pin 4 and the steering wheel metal skeleton is eliminated. When encountering bumpy roads of the steering wheel, abnormal noises can be reduced or even eliminated, effectively avoiding the noise and abnormal noises of the steering wheel on bumpy roads, so that the driver is not disturbed, without adding a shock damper, reducing the part cost, and furthermore, there is no need to increase the safety gap between the steering wheel and the airbag 7, which can reduce the styling space requirements of the steering wheel, with a simple structure and convenient assembly.

[0056] As Figure 1 and Figure 2 shown, the steering wheel skeleton 1, the limiting ring body 2, the buffer gasket 3, the positioning pin 4, the pin piece 5, the sounding component 6, and the airbag 7 of this application are fixedly connected through clamping in sequence. The airbag 7 is a driver airbag. The limiting ring body 2 is assembled on the steering wheel skeleton 1 at a specific angle, and the positioning pin 4 passes through the limiting ring body 2 and the buffer gasket 3 at a fixed angle to ensure that the hooking port direction at the upper end of the positioning pin 4 is clamped with the airbag 7 steel wire at a fixed angle. Then, the pin piece 5 is clamped in the card slot 42 of the positioning pin 4 through deformation. The sounding component 6 passes through the positioning pin 4 and is clamped and positioned with it. Finally, the airbag 7 is clamped on the positioning pin 4 again.

[0057] The positioning pin 4 of this application is on the steering wheel, and the gap between the positioning pin 4 and the steering wheel metal skeleton is eliminated, which can effectively avoid the noise and abnormal noises of the steering wheel on bumpy roads. In addition, due to the elimination of the shock damper, it has the advantages of simple structure, convenient assembly, and low cost, and can also realize the sharing of platform parts such as the sounding component 6, the positioning pin 4, and the pin piece 5. It greatly meets the different needs of customers.

[0058] In this specification, the same or similar parts among the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the foregoing embodiments.

[0059] As described above, it is only the specific implementation manner 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 those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A low-cost steering wheel, comprising a steering wheel skeleton, a positioning pin and a pin piece. A skeleton hole is provided in the hub area of the steering wheel skeleton. The positioning pin includes a pin body and a head. The pin body is inserted into the skeleton hole from one side of the hub area, and the pin piece is clamped on the pin body on the other side of the hub area. The head and the pin piece respectively constitute the limiting structures of the positioning pin on both sides of the hub area. It is characterized in that, A limiting ring body is provided between the skeleton hole and the positioning pin. The limiting ring body includes an annular base and an anti-rotation positioning column extending in a direction parallel to the axis of the annular base. The skeleton hole is provided with an anti-rotation positioning groove. In the installation position, the anti-rotation positioning column is embedded in the anti-rotation positioning groove, and the annular base is opposite to the head.

2. The low-cost steering wheel according to claim 1, wherein A hook is further fixed on the upper inner side of the annular base. The hook includes a main body portion extending in a direction parallel to the axis of the annular base and a hook portion extending from the main body portion toward the outer side of the annular base. The skeleton hole is concavely provided with a limiting groove from the other side of the hub area inward. The main body portion is inserted into the skeleton hole, and the hook portion hooks the limiting groove. The hook portion and the annular base respectively constitute the limiting structures of the limiting ring body on both sides of the hub area.

3. The low-cost steering wheel according to claim 2, characterized in that, A positioning rib parallel to the axial direction of the skeleton hole is provided on the surface of the anti-rotation positioning column that abuts against the anti-rotation positioning groove; And / or, an inner protrusion parallel to the axial direction of the pin body is provided on the surface of the anti-rotation positioning column that abuts against the pin body.

4. The low-cost steering wheel according to claim 3, wherein The number of the anti-rotation positioning columns is at least three, and the plurality of anti-rotation positioning columns are fixed on the inner side of the annular base and distributed along the circumferential direction of the annular base. The plurality of anti-rotation positioning columns respectively abut against the corresponding anti-rotation positioning grooves through the positioning ribs, and the pin body is inserted into the annular base and is restricted to be abutted between the inner protrusions of the plurality of anti-rotation positioning columns; The plurality of anti-rotation positioning columns are set to have different wall thicknesses, and / or the plurality of anti-rotation positioning columns are asymmetrically distributed along the circumferential direction of the annular base; The hooks are provided in plurality, and the plurality of hooks are distributed along the circumferential direction of the annular base. The plurality of hook portions respectively hook the corresponding limiting grooves.

5. The low-cost steering wheel according to claim 4, wherein The plurality of hooks and the plurality of anti-rotation positioning columns are distributed at intervals along the circumferential direction of the annular base; reinforcing structures extending in a direction parallel to the axis of the annular base are formed on both sides of the anti-rotation positioning column on the annular base, and the reinforcing structures are inserted into the skeleton hole; a groove-like structure for facilitating the deformation of the hook is formed between the hook and the reinforcing structure on the annular base, and a hole-like structure penetrating in a direction parallel to the axis of the annular base is provided at a position on the annular base opposite to the hook portion.

6. The low-cost steering wheel according to any one of claims 1-5, characterized in that, The low-cost steering wheel further includes an airbag housing. A hanging hook opening is provided in the area of the pin body away from the head. A hanging hook rod is installed on the airbag housing, and the hanging hook opening is hooked to the hanging part of the hanging hook rod; A limiting block is formed at a part of the lower outer edge of the annular base, and the limiting block and another part of the lower outer edge of the annular base form a limiting notch; a positioning notch is provided at a part of the outer edge of the head, and the positioning notch makes the other part of the outer edge of the head form a positioning block, and the positioning block is clamped in the limiting notch so that the hanging opening is hung on the hanging part in a fixed direction.

7. The low-cost steering wheel according to claim 6, wherein, A plurality of the skeleton holes are arranged around the center of the hub area, the hanging rod is bent so that the hanging parts are distributed following the skeleton holes, and the fixed direction distributions of the plurality of hanging openings are arranged to adapt to the rod length directions of the corresponding hanging parts.

8. The low-cost steering wheel according to any one of claims 1-5, characterized in that A buffer gasket is abutted between the head and the annular base.

9. The low-cost steering wheel according to any one of claims 1-5, characterized in that, The pin piece is formed into a sheet-like structure that exceeds a semi-circular ring on a part of the circumference around the pin body, the pin piece forms an opening on another part of the circumference of the pin body, guiding bevels are formed at positions close to the outer side of the pin piece on two opposite side walls of the opening, and the two guiding bevels are in an open-mouth shape and symmetrically arranged in the direction from the inner side of the pin piece to the outer side of the pin piece, and the inner side of the pin piece is clamped in the card slot on the circumference of the pin body through the deformation of the opening.

10. The low-cost steering wheel according to claim 9, characterized in that, A plurality of convex parts that support the card slot are formed on the inner circumference of the pin piece; concave parts for facilitating the deformation of the pin piece are formed on both sides of the convex parts on the inner circumference of the pin piece, and the convex parts and the concave parts form a gear-like structure distributed along the inner circumference of the pin piece.

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