KR19990039859A - Air bag equivalent mass production method - Google Patents

Abstract

Disclosed is a manufacturing method of manufacturing an equivalent member that enables tuning of a dynamic damper without an air bag being mounted. This manufacturing method includes a first step of measuring the mass of the airbag module 100; A second step of setting the equivalent member 200 equal to the mass of the airbag module; A third step of mounting the airbag module to the steering wheel and measuring a frequency response function through an impact test; And a fourth step of attaching the equivalent member to the steering wheel and measuring it to match the frequency response function measured in the step through the impact test. The equivalent member produced through this manufacturing method has the same equivalent mass as that of the airbag module, thus enabling the tuning operation of the dynamic damper without installing the airbag, thereby greatly reducing the work.

Description

Air bag equivalent mass production method

The present invention relates to a method for manufacturing an airbag equivalent mass, and more particularly, to a method for manufacturing an airbag equivalent mass capable of tuning a dynamic damper of a steering wheel without mounting an airbag module when a vehicle is manufactured.

In general, as shown in Figure 1, the vehicle is equipped with an airbag module 10 for the safety of passengers in the event of a crash. The airbag module 10 is integrally configured with an airbag, an inflator, a collision sensor, and an auxiliary power circuit and mounted to the steering wheel 20.

In some cases, a dynamic damper of a steering wheel may be tuned to reduce vibrations of a steering wheel in manufacturing a vehicle.

However, since the airbag module is mounted on the steering wheel of the airbag specification, in order to tune the dynamic damper, it is necessary to remove the airbag module.

SUMMARY OF THE INVENTION The present invention was created to solve the above problems, and provides a method for manufacturing an airbag equivalent mass capable of tuning a dynamic damper of a steering wheel without removing the airbag module. The purpose is to provide.

1 is a schematic view showing an airbag module;

2 is a plan view of the equivalent member of the present invention;

3A and 3B are front and side views of the equivalent member of the present invention.

* Explanation of symbols for main parts of the drawings

100 ... airbag module 200 ... equivalent member

201-204 ... weight 210 ... screw

211 ... nuts

Airbag equivalent mass production method of the present invention to achieve the above object,

A first step of measuring a mass of the airbag module;

A second step of setting an equivalent member equal to the mass of the airbag module;

Attaching the airbag module to a steering wheel and measuring a frequency response function through an impact test;

And a fourth step of mounting the equivalent member to the steering wheel and measuring it to match the frequency response function measured in the step through an impact test.

The equivalent member includes a plurality of weights and is configured to movably couple the plurality of weights to the screw and to fix the nut at any position.

Such an equivalent member can adjust the number and position of each weight to match the mass and moment of inertia with the airbag module.

According to the above feature of the present invention, the equivalent member produced by the manufacturing method of the present invention has an equivalent mass corresponding to that of the airbag module, so that the dynamic damper can be tuned without mounting the airbag to the steering wheel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, the airbag equivalent mass manufacturing method according to the present invention first measures the mass of the airbag module 100. And the equivalent member 200 is manufactured by setting the same as the mass of the airbag module 200.

The equivalent member 200 includes a plurality of weights 201-204, a screw 210 for supporting the plurality of weights 201-204, and a plurality of nuts 211 for fixing at arbitrary positions.

Subsequently, the airbag module 100 is mounted on a steering wheel (not shown), a frequency response function is measured through an impact hammer test, and an equivalent member 200 is mounted on the steering wheel. The impact test is made while moving each weight 201-204 on the screw 210 to match the frequency response function measured in the step.

The equivalent member 200 manufactured as described above has the same mass and inertia moment as the airbag module 100.

Meanwhile, the dynamic damper (not shown) may be tuned by mounting the equivalent member 200 manufactured as described above before mounting the airbag module 100.

Therefore, it is possible to tune the dynamic damper (dynamic damper) without mounting the airbag module 100.

As described above, the present invention has the same equivalent mass as that of the airbag module, in contrast to the inconvenience of having to detach the airbag module when tuning the dynamic damper of the steering wheel to reduce vibration of the conventional steering wheel. By enabling the manufacture of the equivalent member, it is possible to tune the dynamic damper without the installation of an air bag, thereby greatly reducing the work.

Claims (2)

A first step of measuring a mass of the airbag module; A second step of setting an equivalent member equal to the mass of the airbag module; Attaching the airbag module to a steering wheel and measuring a frequency response function through an impact test; And attaching the equivalent member to the steering wheel and measuring the same as the frequency response function measured in the step through an impact test. The method according to claim 1, wherein the equivalent member includes a plurality of weights, and the plurality of weights are movably coupled to the screw and fixed to a nut at an arbitrary position.