Axial variable-damping hydraulic bushing for automotive suspension

Abstract

The invention discloses an axial variable-damping hydraulic bushing for an automotive suspension. The axial variable-damping hydraulic bushing comprises an inner tube, an outer tube and rubber bodies. The rubber bodies are arranged between the inner tube and the outer tube, are connected with each other and include an upper rubber body and a lower rubber body, the upper rubber body and the lower rubber body are of split structures, a hydraulic working cavity is formed among the upper rubber body, the lower rubber body, the inner tube and the outer tube, a cavity partition device is arranged in the hydraulic working cavity, and damping adjusting assemblies which are used for adaptively adjusting damping force are arranged at communicated ends of a damping channel, an upper working cavity and a lower working cavity. The axial variable-damping hydraulic bushing has the advantages that excellent axial damping effects can be realized when the bushing is vertically mounted along an automobile body, accordingly, the axial variable-damping hydraulic bushing is high in axial rigidity, axial vibration can be buffered, and noise can be reduced; the damping force can be adaptively adjusted according to different working conditions, so that service requirements under the different working conditions can be met.

Description

technical field [0001] The invention relates to the field of vibration reduction of automobile chassis, in particular to an axial type damping variable hydraulic bushing 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. Most of the existing rubber bushes are pure rubber bushes, which have the advantages of low price, simple manufacturing process, and small space occupation. However, in the chassis suspension system, simple pure rubber bushes are used in low frequency, The vibration and noise reduction requirements of high stiffness and high damping cannot be met under the large ...

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Problems solved by technology

However, most of the existing hydraulic bushings are radial hydraulic bushings. When the hydraulic bushing needs to be installed vertically along the vehicle body, it cannot improve the better axial damping effect, so it is difficult to obtain high axial rigidity. There are axial hydraulic bushings in the prior art, but the axial hydraulic working chambers are connected through damping passages with constant apertures, and the damping force does not change when it is suitable for low-frequency, large-amplitude working conditions or high-frequency, small-amplitude working conditions. Large, the damping force cannot be adaptively adjusted according to different working conditions, resulting in poor adaptation of the axial hydraulic bushing

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