A kind of automobile steering wheel vibration reduction structure

Abstract

The present invention discloses a vehicle steering wheel vibration reduction structure, comprising a metal frame and an airbag module, at least two vibration reduction units are arranged on the metal frame, connecting pins are respectively inserted into the vibration reduction units, the upper ends of the connecting pins are connected to the airbag modules, and the airbag modules are used to absorb energy and reduce vibration through the vibration reduction units as counterweights; the vibration reduction unit comprises a vibration reduction sleeve, a buckle and a vibration reduction spring, the vibration reduction sleeve is embedded and mounted in a corresponding mounting hole on the metal frame, the buckle is sleeved on the connecting pin and embedded and mounted in the vibration reduction sleeve, the vibration reduction spring is sleeved on the upper part of the connecting pin and the lower end is clamped on the buckle; the upper end of the connecting pin is inserted into the support plate of the airbag module and is clamped and fixed by a torsion spring. The structure can integrate vibration reduction and speaker functions, achieve good vibration reduction and noise reduction effects in a limited space, and is also conducive to product platform layout.

Description

Technical Field

[0001] The invention relates to the field of automobile steering wheels, and in particular to a vibration reduction structure of an automobile steering wheel. Background Art

[0002] As the market's requirements for automobile performance become increasingly higher, vehicle manufacturers are paying more and more attention to the NVH performance of their products. Steering wheel vibration and noise directly affect the driver's driving experience and comfort. Therefore, it is of great significance to add a vibration reduction structure to the steering wheel and integrate a horn mechanism that effectively reduces contact noise to control vibration and reduce noise.

[0003] Most vibration reduction structures usually add a frequency-adjustable weight block made of elastic body inside the steering wheel to absorb the energy of the steering wheel vibration. However, the vibration reduction effect is limited and it is difficult to suppress low-frequency and small-amplitude vibrations. At the same time, the weight block has a large mass and a complex fixing structure. Due to the small space inside the steering wheel, the structure layout is difficult and the cost is high.

[0004] Some hook-type connection structures can limit the travel of the speaker, but the speaker rebounds and makes a loud noise, which may cause customer dissatisfaction.

[0005] Therefore, it is necessary to develop a steering wheel vibration reduction structure that can integrate vibration reduction and horn functions, achieve good vibration reduction and noise reduction effects in a limited space, and facilitate product platform layout. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a car steering wheel vibration reduction structure which can achieve good vibration reduction effect in a limited space and is conducive to product platform layout.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A vehicle steering wheel vibration reduction structure comprises a metal frame and an airbag module, wherein at least two vibration reduction units are arranged on the metal frame, and connecting pins are respectively inserted into the vibration reduction units, and the upper ends of the connecting pins are connected to the airbag modules, so as to absorb energy and reduce vibration by using the vibration reduction units to use the airbag modules as counterweights;

[0009] The vibration reduction unit comprises a vibration reduction sleeve, a buckle and a vibration reduction spring. The vibration reduction sleeve is embedded and clamped in a corresponding mounting hole on the metal frame. The buckle is sleeved on the connecting pin and embedded and clamped in the vibration reduction sleeve. The vibration reduction spring is sleeved on the upper part of the connecting pin and the lower end is clamped on the buckle.

[0010] The upper end of the connecting pin is inserted into the support plate of the airbag module and is fixed by clamping with a torsion spring.

[0011] As a further preference, a gasket is clamped at the lower end of the buckle, and the gasket is clamped between the big end of the connecting pin and the vibration-damping sleeve to achieve the limiting of the buckle.

[0012] As a further preference, the vibration-damping sleeve is made of a silicone material, and an annular groove is provided in the middle of the outer edge thereof for being clamped in a corresponding mounting hole on the metal frame.

[0013] As a further preference, the buckle is a hollow structure, and the lower end of the buckle is provided with elastic hooks evenly distributed around the circumference, which are used to be embedded and mounted in the vibration-damping sleeve; an annular clamping edge is provided on the upper part of the buckle, which is used to be clamped on the upper end surface of the vibration-damping sleeve; and elastic barbs are evenly distributed around the circumference of the upper end of the buckle, and the lower end of the vibration-damping spring is clamped on the elastic barbs.

[0014] As a further preference, there are three vibration reduction units, which are arranged on the metal frame in the form of an isosceles triangle.

[0015] As a further preference, an annular groove is provided at the upper end of the connecting pin, and the torsion spring is clamped in the annular groove.

[0016] As a further preference, a connector is provided at one end of the torsion spring, and the vehicle horn input signal is connected through the connector; a conductive sheet is installed on the bottom surface of each mounting hole on the metal frame through a bracket, and the conductive sheet is electrically connected to the metal frame through a bracket or a screw, and an upwardly protruding spring sheet is provided below the corresponding connecting pin on the conductive sheet to form a horn mechanism, and the connecting pin and the conductive sheet serve as the upper contact and lower contact of the horn mechanism respectively.

[0017] As a further preference, a rectangular boss is provided in the middle of the conductive sheet, and an L-shaped cutout is provided on the top surface of the rectangular boss to form the spring sheet.

[0018] As a further preference, a connector is provided at one end of the torsion spring, and the vehicle horn input signal is connected through the connector; bosses are respectively provided below the torsion springs corresponding to each vibration damping unit on the metal frame, and rivets are respectively provided on the upper ends of the bosses to form a horn mechanism, and the torsion spring and rivet serve as the upper contact and lower contact of the horn mechanism respectively.

[0019] The beneficial effects of the present invention are:

[0020] 1. Since at least two vibration reduction units are arranged on the metal frame, connecting pins are respectively inserted into the vibration reduction units, and the upper ends of the connecting pins are connected to the airbag module, the vibration reduction units and the connecting pins cooperate to install the airbag module as a counterweight on the metal frame, which can play a role in energy absorption and vibration reduction, and achieve a good vibration reduction effect in a limited space, thereby improving the driver's driving experience and comfort, and facilitating the platform layout of the product.

[0021] 2. Since the vibration damping unit includes a vibration damping sleeve, a buckle and a vibration damping spring, the vibration damping sleeve is embedded and clamped in the corresponding mounting hole on the metal frame, the buckle is sleeved on the connecting pin and embedded and clamped in the vibration damping sleeve, the vibration damping spring is sleeved on the upper part of the connecting pin and the lower end is clamped on the buckle, the upper end of the connecting pin is inserted into the support plate of the airbag module and fixed by the torsion spring, so the vibration damping unit can not only achieve a good vibration damping effect, but also the vibration frequency of the steering wheel assembly can be adjusted by replacing vibration damping sleeves with different hardness, thereby meeting the different frequency requirements of customers.

[0022] 3. Since the upper end of the connecting pin is inserted into the support plate of the airbag module and fixed by the torsion spring, there is no relative displacement between the connecting pin and the torsion spring, which can avoid abnormal noise caused by the rebound of the airbag module and has a good noise reduction effect; and by arranging a connector at one end of the torsion spring and connecting the input signal of the vehicle horn, the integrated horn function can be realized in combination with the vibration reduction unit and the connecting pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 yes Figure 1 AA section view.

[0025] Figure 3 yes Figure 1 Rear view without the metal frame.

[0026] Figure 4 It is a structural schematic diagram of the buckle of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the speaker mechanism corresponding to Example 1 of the present invention.

[0028] Figure 6 yes Figure 5 BB cross-sectional view.

[0029] Figure 7 It is a structural schematic diagram of the speaker mechanism corresponding to Example 2 of the present invention.

[0030] In the figure: metal frame 1, boss 101, support plate 2, support plate seat 201, connecting pin 3, gasket 4, vibration-damping spring 5, torsion spring 6, connector 601, buckle 7, elastic hook 701, annular clamping edge 702, elastic barb 703, vibration-damping sleeve 8, conductive sheet 9, spring piece 901, screw 10, bracket 11, rivet 12. DETAILED DESCRIPTION

[0031] Example 1

[0032] like Figure 1-Figure 4As shown, the present invention relates to a car steering wheel vibration reduction structure, including a metal frame 1 and an airbag module. At least two vibration reduction units are provided on the metal frame 1, and a connecting pin 3 is inserted into each vibration reduction unit. The upper end of the connecting pin 3 is connected to the support plate 2 of the airbag module, which is used to use the vibration reduction unit to use the airbag module as a counterweight to absorb energy and reduce vibration.

[0033] Preferably, there are three vibration reduction units, which are arranged on the metal frame 1 in the form of an isosceles triangle.

[0034] The vibration damping unit includes a vibration damping sleeve 8, a buckle 7 and a vibration damping spring 5. The buckle 7 is sleeved on the connecting pin 3 and embedded in the vibration damping sleeve 8. The vibration damping sleeve 8 is embedded in the corresponding mounting hole on the metal frame 1. The vibration damping spring 5 is sleeved on the upper part of the connecting pin 3 and the lower end is clamped on the buckle 7. A gasket 4 is clamped at the lower end of the buckle 7. The gasket 4 is clamped between the large head end of the connecting pin 3 and the vibration damping sleeve 8 to achieve the limiting of the buckle 7.

[0035] The vibration-damping sleeve 8 is made of silicone material, and an annular groove is provided in the middle of its outer edge, which is used to be clamped in the corresponding mounting hole on the metal frame 1. The buckle 7 is a hollow structure and is made of a thermoplastic polyester elastomer with vibration-damping properties. The lower end of the buckle 7 is provided with three elastic hooks 701 evenly distributed around the circumference, which are used to be embedded and clamped in the vibration-damping sleeve 8 and clamped at the lower end of the inner hole of the gasket 4 to achieve the positioning of the buckle 7; an annular clamping edge 702 is provided on the upper part of the buckle 7, which is used to clamp on the upper end surface of the vibration-damping sleeve 8; three elastic barbs 703 are evenly distributed around the upper end of the buckle 7, and the lower end of the vibration-damping spring 5 is clamped on the elastic barbs 703, and the upper end of the vibration-damping spring 5 is pressed against the bottom surface of the support plate 2 of the airbag module.

[0036] Annular grooves are respectively provided at the upper ends of the connecting pins 3, and the upper ends of the connecting pins 3 are respectively inserted into the three support plate seats 201 on the bottom surface of the support plate 2 of the airbag module and fixed by torsion springs 6. The torsion springs 6 are formed by bending an elastic steel wire and are tightly clamped into the annular grooves at the upper ends of each connecting pin 3.

[0037] like Figure 3 , Figure 5 and Figure 6As shown, a plug-in sheet 601 is pressed on one end of the torsion spring 6, and the input signal of the vehicle horn is connected through the plug-in sheet 601. The horn input signal is transmitted to the connecting pin 3 connected to the torsion spring 6 through the torsion spring 6; a conductive sheet 9 is installed on the bottom surface of each mounting hole on the metal frame 1 through a bracket 11, and the conductive sheet 9 is electrically connected to the metal frame 1 through the bracket 11 or the screw 10. In this embodiment, the bracket 11 is an injection molded part, and the conductive sheet 9 is pre-embedded in the bracket 11 and electrically connected to the metal frame 1 through the screw 10. A trapezoidal spring sheet 901 protruding upward is provided on the conductive sheet 9 corresponding to the lower side of the connecting pin 3, which is used to form a horn mechanism, and the connecting pin 3 and the conductive sheet 9 serve as the upper contact and the lower contact of the horn mechanism respectively.

[0038] A rectangular boss is folded in the middle of the conductive sheet 9, and an L-shaped cutout is provided on the top surface of the rectangular boss to form the spring sheet 901. A small angle is provided between the spring sheet 901 and the top surface of the rectangular boss, and a folded edge is provided at the top of the spring sheet 901, so that the connecting pin 3 and the conductive sheet 9 are in elastic contact when the speaker is pressed, and the contact noise is small.

[0039] During the driving process of the automobile, the airbag module is installed on the metal frame 1 as a whole counterweight through the vibration reduction unit and the connecting pin 3. The vibration reduction unit adjusts the vibration frequency through the vibration reduction sleeve 8 and the vibration reduction spring 5. The vibration reduction unit causes the vibration reduction sleeve 8 to vibrate and absorb energy according to the vibration excitation in different directions, thereby reducing the vibration of the steering wheel and improving the driving experience and comfort of the driver.

[0040] When the horn is pressed, the torsion spring 6 and the connecting pin 3 at the corresponding position are driven downward by the support plate of the airbag module. After the connecting pin 3 moves downward, it contacts the conductive sheet 9, so that the horn circuit can be connected to sound the horn.

[0041] Example 2

[0042] like Figure 1-Figure 4 and Figure 7 As shown, the present invention relates to a car steering wheel vibration reduction structure, including a metal frame 1 and an airbag module. At least two vibration reduction units are provided on the metal frame 1, and a connecting pin 3 is inserted into each vibration reduction unit. The upper end of the connecting pin 3 is clamped to the airbag module through a torsion spring 6, so that the airbag module is used as a counterweight block through the vibration reduction unit to absorb energy and reduce vibration.

[0043] A connector 601 is provided at one end of the torsion spring 6, and the vehicle horn input signal is connected through the connector 601; conical bosses 101 are provided below the torsion spring 6 corresponding to each vibration reduction unit on the metal frame 1, and rivets 12 are provided at the upper ends of the bosses 101 to form a horn mechanism, and the torsion spring 6 and the rivet serve as the upper contact and lower contact of the horn mechanism respectively.

[0044] The other structures of this embodiment are the same as those of Embodiment 1 and will not be described in detail in this embodiment.

[0045] When the horn is pressed, the torsion spring 6 is driven downward by the support plate of the airbag module. After the torsion spring 6 moves downward, it contacts the rivet on the upper end of the corresponding boss, so that the horn circuit can be connected to sound the horn.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle steering wheel vibration reduction structure, comprising a metal frame and an airbag module, characterized in that: At least two vibration reduction units are arranged on the metal frame, and connecting pins are respectively inserted into the vibration reduction units, and the upper ends of the connecting pins are connected to the airbag module, so as to use the vibration reduction unit to use the airbag module as a counterweight to absorb energy and reduce vibration; The vibration reduction unit comprises a vibration reduction sleeve, a buckle and a vibration reduction spring. The vibration reduction sleeve is embedded and clamped in a corresponding mounting hole on the metal frame. The buckle is sleeved on the connecting pin and embedded and clamped in the vibration reduction sleeve. The vibration reduction spring is sleeved on the upper part of the connecting pin and the lower end is clamped on the buckle. The vibration reduction sleeve is made of silicone material. The upper end of the connecting pin is inserted into the support plate of the airbag module and fixed by a torsion spring; An annular groove is provided at the upper end of the connecting pin, and the torsion spring is stuck in the annular groove; a connector is provided at one end of the torsion spring, and the input signal of the vehicle horn is connected through the connector; a conductive sheet is installed on the bottom surface of each mounting hole on the metal frame through a bracket, and the conductive sheet is electrically connected to the metal frame through a bracket or a screw, and an upwardly protruding spring sheet is provided on the conductive sheet corresponding to the lower side of the connecting pin, which is used to form a horn mechanism, and the connecting pin and the conductive sheet serve as the upper contact and lower contact of the horn mechanism respectively.

2. The automobile steering wheel vibration reduction structure according to claim 1 is characterized in that: A gasket is clamped at the lower end of the buckle, and the gasket is clamped between the big end of the connecting pin and the vibration-damping sleeve to achieve the limiting of the buckle.

3. The automobile steering wheel vibration reduction structure according to claim 2 is characterized in that: An annular groove is provided in the middle of the outer edge of the vibration-damping sleeve for being clamped in a corresponding mounting hole on the metal frame.

4. The automobile steering wheel vibration reduction structure according to claim 1 or 2, characterized in that: The buckle is a hollow structure, and the lower end of the buckle is provided with elastic hooks evenly distributed around the circumference, which are used to be embedded and mounted in the vibration-damping sleeve; an annular clamping edge is provided on the upper part of the buckle, which is used to be clamped on the upper end surface of the vibration-damping sleeve; elastic barbs are evenly distributed around the circumference of the upper end of the buckle, and the lower end of the vibration-damping spring is clamped on the elastic barbs.

5. The automobile steering wheel vibration reduction structure according to claim 1 is characterized in that: There are three vibration reduction units, which are arranged on the metal frame in an isosceles triangle.

6. The automobile steering wheel vibration reduction structure according to claim 1, characterized in that: A rectangular boss is provided in the middle of the conductive sheet, and an L-shaped cutout is provided on the top surface of the rectangular boss to form the spring sheet.

7. The automobile steering wheel vibration reduction structure according to claim 1 is characterized in that: A connector is provided at one end of the torsion spring, and the vehicle horn input signal is connected through the connector; bosses are provided below the torsion springs corresponding to each vibration reduction unit on the metal frame, and rivets are provided on the upper ends of the bosses to form a horn mechanism, and the torsion spring and the rivet serve as the upper contact and the lower contact of the horn mechanism respectively.

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