Airbag vibration reduction structure

Abstract

The present invention relates to the field of automobile airbag systems, specifically an airbag vibration reduction structure, which is applied to the connection position between the gas generator and the airbag airbag support ring assembly in the airbag module, the gas generator is provided with a flange surface on the periphery, the flange surface is provided with an opening, and the airbag airbag support ring assembly has a support ring stud corresponding to the flange surface opening; an airbag vibration reduction pad is clamped in the flange surface opening, the support ring stud passes through the axial opening of the airbag vibration reduction pad and the shell opening of the airbag module in turn, and is locked with the shell of the airbag module through a locking nut; the shell of the airbag module receives abnormal vibration input from the steering wheel through a connection structure with the steering wheel, and the abnormal vibration is then transmitted to the gas generator through the support ring stud and the airbag vibration reduction pad, and the gas generator absorbs the abnormal vibration and generates shaking to achieve a vibration reduction function. The problem of space occupation is solved, the structure is simple, the cost is low, the weight is light, and vibration reduction pads with different hardness parameters can be interchanged, and it is also convenient to improve the designed steering wheel and airbag structure to add a vibration reduction function.

Description

Technical Field

[0001] The invention relates to the technical field of automobile airbag systems, and in particular to an airbag vibration reduction structure. Background Art

[0002] At present, the requirements for automobile vibration reduction performance are getting higher and higher, and vehicle manufacturers are paying more and more attention to the vibration reduction performance of their products. With the widespread application of three-cylinder engines in the market and the increase in engine power, the steering wheel vibration problem will directly affect the driver's driving experience and comfort. Therefore, it is of great significance to add vibration reduction function to the steering wheel system accessories.

[0003] For this reason, most vehicle manufacturers have introduced the concept of vibration damping blocks based on the vibration reduction principle. Simply put, a vibration damping block is a mass block that is set on the target structure and can move relative to it, so as to absorb abnormal vibrations generated on the structure. Specifically, most vehicle manufacturers achieve vibration reduction by adding vibration damping blocks / counterweight bars to the steering wheel body. However, with the development trend of the steering wheel system, the internal space between the steering wheel and the driver's airbag has gradually become smaller. Due to the limitation of the internal space of the steering wheel system, it is difficult to arrange the vibration damping block structure space, which increases the difficulty of design. At the same time, the cost is greatly increased, and the actual vibration reduction effect is not ideal.

[0004] In this regard, the existing patent CN116348360A - Airbag module assembly, its manufacturing and quality inspection method and vehicle steering wheel with such airbag module assembly, uses the airbag module as a whole as a shock-absorbing block, that is, cancels the addition of a shock-absorbing block to circumvent the above-mentioned problem. Specifically, the airbag module assembly is fastened to the steering wheel base through a shock-absorbing unit to achieve a vibration reduction effect. However, this method has a complex structure and needs to consider the problem of accidental horn touching. In addition, it is difficult to modify the already formed steering wheel and airbag structure to add such a vibration reduction structure. Summary of the invention

[0005] In view of the above problems, an embodiment of the present invention provides an airbag vibration reduction structure.

[0006] An airbag vibration damping structure provided in an embodiment of the present invention is applied to the connection position between a gas generator and an airbag airbag support ring assembly in an airbag module. A flange surface is provided on the outer periphery of the gas generator, an opening is provided on the flange surface, and the airbag airbag support ring assembly has a support ring stud corresponding to the flange surface opening; an airbag vibration damping pad is clamped in the flange surface opening, and the support ring stud passes through the axial opening of the airbag vibration damping pad and the shell opening of the airbag module in sequence, and is locked with the shell of the airbag module by a locking nut; the shell of the airbag module receives abnormal vibration input by the steering wheel through a connection structure with the steering wheel, and the abnormal vibration is then transmitted to the gas generator through the support ring stud and the airbag vibration damping pad, and the gas generator generates shaking after absorbing the abnormal vibration, absorbs vibration energy and thus realizes the vibration damping function.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: the airbag module in the steering wheel system does not increase the cumbersome structure due to the addition of the vibration reduction function. Only an airbag vibration reduction pad is added between the flange surface opening on the gas generator housing and the support ring stud, which greatly solves the problem of space occupation. The structure is simple, the cost is low, and the weight is light. In addition, the airbag vibration reduction pad can meet the interchangeability requirements, that is, the vibration frequency can be adjusted by replacing the airbag vibration reduction pad with different hardness parameters to meet the requirements of different vehicle conditions and different vibration reduction frequencies. Finally, for the steering wheel and airbag structure of the whole vehicle product that have been designed and formed, it is only necessary to set the airbag vibration reduction pad on the original support ring stud to meet the requirement of adding the vibration reduction function. The operation is convenient and does not require major structural improvements.

[0008] Optionally, the portion of the support ring stud that contacts the airbag vibration damping pad is a smooth surface without a threaded structure.

[0009] Optionally, the airbag airbag support ring assembly is inserted into the airbag bag of the airbag module, and the support ring stud passes through the opening of the airbag bag, the axial opening of the airbag vibration damping pad, and the shell opening of the airbag module in sequence, and is locked with the shell of the airbag module by a locking nut.

[0010] Optionally, the diameter of the smooth surface portion of the support ring stud is larger than the diameter of the shell opening of the airbag module, thereby limiting the tightening stroke of the locking nut, locating the installation position of the shell of the airbag module and the support ring stud, and ensuring the vibration space of the airbag vibration damping pad.

[0011] Optionally, the length of the portion having the smooth surface in the support ring stud is greater than the axial length of the airbag vibration damping pad.

[0012] Optionally, the airbag vibration damping pad is in the shape of a truncated cone as a whole, and an annular groove matching the opening of the flange surface is circumferentially arranged on the outer side surface.

[0013] Optionally, an inclined transition surface is provided between the top surface and the outer side surface of the airbag vibration damping pad, the inclined transition surface extends downward to a predetermined distance above the annular groove, and the bottom of the airbag vibration damping pad has a reinforcement section of predetermined length and equal diameter.

[0014] Optionally, the airbag vibration damping pad is made of a material with corresponding hardness parameters according to different vibration frequency requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. In the drawings:

[0016] Figure 1 A cross-sectional view of an airbag vibration reduction structure provided by an embodiment of the present invention being installed in a steering wheel system;

[0017] Figure 2A cross-sectional view of an airbag vibration reduction structure provided by an embodiment of the present invention being arranged in an airbag module;

[0018] Figure 3 A schematic diagram of a three-dimensional structure of an airbag vibration reduction structure provided by an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the main structure of an airbag vibration reduction structure provided by an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of a front cross-sectional structure of an airbag vibration reduction structure provided by an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of a front cross-sectional structure of another airbag vibration reduction structure provided by an embodiment of the present invention;

[0022] Figure 7 A schematic diagram of the structure of an airbag vibration damping pad provided by an embodiment of the present invention;

[0023] Figure 8 A schematic cross-sectional structure diagram of a support ring assembly provided in an embodiment of the present invention.

[0024] Among them, 1. gas generator; 2. airbag support ring assembly; 3. flange surface; 4. support ring stud; 5. airbag vibration damping pad; 6. shell; 7. locking nut; 8. steering wheel; 9. smooth surface; 10. airbag bag; 11. annular groove; 12. inclined transition surface; 13. reinforcement section. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0026] See also Figure 1-Figure 8 An airbag vibration reduction structure provided by an embodiment of the present invention is applied to the connection position between a gas generator 1 and an airbag airbag support ring assembly 2 in an airbag module. A flange surface 3 is provided on the outer periphery of the gas generator 1, and an opening is provided on the flange surface 3. The airbag airbag support ring assembly 2 has a support ring stud 4 corresponding to the opening of the flange surface 3; an airbag vibration reduction pad 5 is clamped in the opening of the flange surface 3, and the support ring stud 4 passes through the axial opening of the airbag vibration reduction pad 5 and the opening of the shell 6 of the airbag module in sequence, and is locked with the shell 6 of the airbag module by a locking nut 7; the shell 6 of the airbag module receives abnormal vibration input by the steering wheel 8 through a connection structure with the steering wheel 8, and the abnormal vibration is then transmitted to the gas generator 1 through the support ring stud 4 and the airbag vibration reduction pad 5. After absorbing the abnormal vibration, the gas generator 1 generates shaking, performs vibration energy absorption, and thus realizes the vibration reduction function.

[0027] During implementation, the airbag vibration damping pad 5 is arranged in accordance with the number of the support ring studs 4. The airbag vibration damping pad 5 serves as an intermediate carrier to connect the airbag airbag support ring assembly 2 and the gas generator 1. The vibration transmitted from the steering wheel 8 to the airbag module is transferred to the gas generator 1 through the airbag vibration damping pad 5. The gas generator 1 acts as a vibration damping block in the airbag module to generate shaking, thereby achieving a vibration reduction effect.

[0028] In practice, the portion of the support ring stud 4 that contacts the airbag vibration damping pad 5 is a smooth surface 9 without a threaded structure, which is convenient for perforation and vibration damping cooperation.

[0029] For more information, see Figure 6 The airbag support ring assembly 2 is inserted into the airbag bag 10 of the airbag module, and the support ring stud 4 passes through the opening of the airbag bag 10, the axial opening of the airbag vibration damping pad 5, and the opening of the shell 6 of the airbag module in sequence, and is locked with the shell 6 of the airbag module by the locking nut 7; the length of the part with the smooth surface 9 in the support ring stud 4 can be defined and designed according to the axial length of the airbag vibration damping pad 5 and the thickness of the airbag bag 10.

[0030] The diameter of the portion with the smooth surface 9 in the support ring stud 4 is larger than the diameter of the opening of the shell 6 of the airbag module, thereby limiting the tightening stroke of the locking nut 7, positioning the installation position of the shell 6 of the airbag module and the support ring stud 4, and ensuring the vibration space of the airbag vibration damping pad 5.

[0031] The length of the portion of the support ring stud 4 having the smooth surface 9 is greater than the axial length of the airbag vibration damping pad 5 .

[0032] The airbag vibration-damping pad 5 is in a truncated cone shape as a whole, and an annular groove 11 is circumferentially arranged on the outer side surface to match the opening of the flange surface 3 .

[0033] An inclined transition surface 12 is provided between the top surface and the outer side surface of the airbag vibration damping pad 5 , and the inclined transition surface 12 extends downward to a predetermined distance above the annular groove 11 . The bottom of the airbag vibration damping pad 5 has a reinforcement section 13 of predetermined length and equal diameter.

[0034] The airbag vibration damping pad 5 is made of materials with corresponding hardness parameters according to different vibration frequency requirements, so as to adapt to different vehicle models.

[0035] According to the solution provided by the present invention, the airbag module in the steering wheel system does not increase the complicated structure due to the increase of the vibration reduction function. Only an airbag vibration reduction pad 5 is added between the flange surface 3 opening on the shell of the gas generator 1 and the support ring stud 4, which greatly solves the problem of space occupation. The structure is simple, the cost is low, and the weight is light. In addition, the airbag vibration reduction pad 5 can meet the interchangeability requirements, that is, the vibration frequency can be adjusted by replacing and adjusting the airbag vibration reduction pad 5 with different hardness to meet the requirements of different vehicle conditions and different vibration reduction frequencies. Finally, for the steering wheel and airbag structure of the whole vehicle product that have been designed and formed, it is only necessary to set the airbag vibration reduction pad 5 on the original support ring stud 4 to meet the requirement of adding the vibration reduction function. The operation is convenient and no major structural improvement is required.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An airbag vibration reduction structure is applied to the connection position between the gas generator and the airbag airbag support ring assembly in the airbag module, the gas generator is provided with a flange surface on the periphery, the flange surface is provided with an opening, and the airbag airbag support ring assembly has a support ring stud corresponding to the flange surface opening; characterized in that: An airbag vibration damping pad is stuck in the opening of the flange surface. The support ring stud passes through the axial opening of the airbag vibration damping pad and the shell opening of the airbag module in sequence, and is locked to the shell of the airbag module by a locking nut. The shell of the airbag module receives abnormal vibration input by the steering wheel through the connection structure with the steering wheel, and the abnormal vibration is then transmitted to the gas generator through the support ring stud and the airbag vibration damping pad. The gas generator absorbs the abnormal vibration and generates shaking, thereby absorbing vibration energy and realizing the vibration reduction function.

2. The airbag vibration reduction structure according to claim 1, characterized in that: The portion of the support ring stud that contacts the airbag vibration damping pad is a smooth surface without a thread structure.

3. The airbag vibration reduction structure according to claim 1, characterized in that: The airbag airbag support ring assembly is inserted into the airbag bag of the airbag module. The support ring stud passes through the opening of the airbag bag, the axial opening of the airbag vibration damping pad, and the shell opening of the airbag module in sequence, and is locked with the shell of the airbag module through a locking nut.

4. The airbag vibration reduction structure according to claim 2, characterized in that: The diameter of the smooth surface portion of the support ring stud is larger than the diameter of the shell opening of the airbag module, thereby limiting the tightening stroke of the locking nut, locating the installation position of the shell of the airbag module and the support ring stud, and ensuring the vibration space of the airbag vibration damping pad.

5. The airbag vibration reduction structure according to claim 2, characterized in that: The length of the portion with the smooth surface in the support ring stud is greater than the axial length of the airbag vibration damping pad.

6. The airbag vibration reduction structure according to any one of claims 1 to 5, characterized in that: The airbag vibration damping pad is in the shape of a truncated cone as a whole, and an annular groove matching the opening of the flange surface is circumferentially arranged on the outer side surface.

7. The airbag vibration reduction structure according to claim 6, characterized in that: An inclined transition surface is arranged between the top surface and the outer side surface of the airbag vibration damping pad, and the inclined transition surface extends downward to a predetermined distance above the annular groove. The bottom of the airbag vibration damping pad has a reinforcement section with a predetermined length and equal diameter.

8. The airbag vibration reduction structure according to claim 6, characterized in that: The airbag vibration damping pad is made of materials with corresponding hardness parameters according to different vibration frequency requirements.

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