Vibration damper

Abstract

The invention provides a vibration damper for supporting the compressor unit of the air spring apparatus on the vehicle body to realize both the vibration protection and durability. An upper bush is secured to a bracket of a compressor unit, and a lower bush is abutted against a panel member of a vehicle body through a washer. A coil spring is interposed between the upper and lower bushes. A pipe member is inserted through the upper and lower bushes and the coil spring. A bolt is inserted through the pipe member and screwed into the panel member of the vehicle body. The compressor unit is resiliently supported floatingly by the coil spring. Vibration of the compressor unit is damped by friction generated by sliding contact between the pipe member and raised portions of the upper bush. When the vibration amplitude is large, respective projections of the upper and lower bushes abut against each other to suppress the vibration while absorbing impact.

Description

technical field [0001] The present invention relates to an anti-vibration device for suppressing vibration from a vibration source such as a compressor to a mounting part such as a vehicle body when, for example, mounting a height-adjusting compressor unit of an air suspension device of an automobile on a vehicle body. transmit vibration. Background technique [0002] The suspension device of the motor vehicle has an air suspension device that can adjust the height of the vehicle by supplying and discharging compressed air from the compressor to the air spring. The air suspension device is provided with an anti-vibration device so that the vibration when the compressor operates is not transmitted to the vehicle body. The existing anti-vibration device arranged on the air suspension device is to suppress the transmission of vibration from the vibration source such as the compressor to the vehicle body by adding rubber or coil springs between the vibration source such as the ...

AI Technical Summary

Problems solved by technology

For the structure using rubber, the anti-vibration performance can be improved by using soft rubber, but the durability is reduced. Therefore, hard rubber has to be used in consideration of durability, and sufficient anti-vibration performance cannot be obtained.

In addition, when the vibration amplitude increases due to compressor start-up, stop, or load fluctuation, even soft rubber may not be able to obtain sufficient vibration-proof effect.

On the other hand, for the structure using a coil spring, high vibration-proof performance and durability can be obtained, but since the vibration on the compressor side cannot be damped, the pipes, hoses, and wires connected to the compressor, etc. are subject to constant vibration. It is easy to deteriorate due to the influence of vibration, and there is a problem that it may have a bad influence on equipment such as compressors due to vibration

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