Self-adapting variable-damping hydraulic pressure rubber vibration isolation device for automobile suspension

Abstract

The invention discloses a self-adapting variable-damping hydraulic pressure rubber vibration isolation device for an automobile suspension. The vibration isolation device comprises an inner pipe, an outer pipe, a rubber body arranged between the inner pipe and the outer pipe, a separation device arranged between the inner pipe and the rubber body, wherein damping adjustment components which are used for adjusting damping force according to pressure are respectively arranged at a communicating end of a fluid flow passage of an isolator I and a hydraulic pressure working chamber, and at a communicating end of a fluid flow passage of an isolator II and a hydraulic pressure working chamber II; the damping adjustment components are arranged, under the working conditions of high frequency and small amplitude, a spring is not compressed or rarely compressed, and damping fluid flows into the fluid flow passages from the outer side of a plunger, so that the requirements for vibration reduction and noise reduction with low rigidity and small damping are satisfied; under the working conditions of low frequency and large amplitude, the inner diameter of a fluid through hole is far smaller than the hole diameter of the fluid flow passages, so that the pressure is increased, and the fluid hole diameter is decreased; therefore, at this moment, the damping force is greatly improved. Compared with an existing rubber lining, the vibration isolation device disclosed by the invention can completely satisfy the requirements of vibration reduction and noise reduction with high rigidity and high damping under the working conditions of low frequency and large amplitude.

Description

technical field [0001] The invention relates to the field of automobile suspension vibration reduction, in particular to an adaptive variable damping hydraulic rubber vibration isolation device for automobile suspension. Background technique [0002] In the current production process of the automobile industry, in order to greatly reduce the vibration of the automobile chassis during driving, the connection between the chassis and the suspension is often changed into a flexible connection. Among them, the most important flexible connection method is through the suspension parts. The end connection points are provided with rubber bushings. The radial type hydraulic bushing is a kind of rubber bushing. Two hydraulic chambers arranged radially opposite to each other are connected by a fluid channel. When a radial impact load or vibration occurs, the damping mucus circulates in the two hydraulic chambers to generate damping. Force, in order to achieve the purpose of vibration i...

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Problems solved by technology

[0003] However, the fluid channels connecting the two hydraulic chambers on the existing radial hydraulic bushings are generally set on the rubber body, which not only easily deforms with the compression of the rubber body when subjected to radial impact loads, resulting in poor damping, or even loss of damping effect, and the damping effect produced by the fluid channel in the prior art is invariable, and the size of the damping hole is fixed. Under different impact load conditions, the damping effect is different and changes accordingly, and the adaptability is not good

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