Vehicle shock-absorbing device

Abstract

The invention relates to the field of vibration noise, and discloses an automotive vibration damping device, which comprises a base, a mass block, a shell and a damping body. The shell is fixed on the base and forms a sealed cavity with the base; the mass block and the damping body are arranged in the cavity; and the damping body contacts the mass block. The automotive vibration damping device has the advantages that the device adopts an encapsulated structure, solves the problem of structural corrosion caused by water, air and oil, and prevents the safety problem caused by release of internal parts; the device adopts the structure of a bidirectional compression elastic body, and solves the problems that the elastic body has low tensile strength and is easy to damage; and the device adopts vulcanized rubber as the elastic body and the damping body, and solves the problems of difficult adjustment and control of rigidity and damping. The vibration damping device is used for reducing noise inside a vehicle when the vehicle is started at low speed by more than 5dBA, has obvious improvement on subjective experience, and improves subjective experience score by two grades; and the durability test meets the test requirements of durability and weather resistance of the whole vehicle.

Description

technical field [0001] The invention relates to the field of vibration and noise, in particular to a vibration damping device for an automobile transmission system. Background technique [0002] At present, when the vehicle is running, the vibration of the structure has a serious impact on the noise inside the vehicle, and the low-frequency noise inside the vehicle makes people quite uncomfortable. Therefore, it is often necessary to use a harmonic damping shock absorber to solve this problem. Traditional mass damping shock absorbers include steel leaf spring-mass damping shock absorber, rubber damping body-mass damping shock absorber; the damping ratio of steel leaf spring in steel leaf spring-mass damping shock absorber is low, and The attenuation effect of vibration is poor, the cost is high, and it is easy to cause reaction and increase vibration when receiving other excitations, and the displacement of the mass block is large in a large vibration environment; The body ...

AI Technical Summary

Problems solved by technology

Traditional mass damping shock absorbers include steel leaf spring-mass damping shock absorber, rubber damping body-mass damping shock absorber; the damping ratio of steel leaf spring in steel leaf spring-mass damping shock absorber is low, and The attenuation effect of vibration is poor, the cost is high, and it is easy to cause reaction to increase vibration when receiving other excitations, and the displacement of the mass block is large in a large vibration environment; The body is a material with low tensile strength and is easy to be cracked. The rubber damping body is exposed to oil, water, and air and is prone to aging and failure. Generally, it is only used in places with small vibrations.

Because the torsional vibration of the chassis structure such as the transmission system is quite large, the traditional mass damping shock absorber cannot meet the requirements of durability and vehicle NVH performance

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