Liquid sealing type anti-vibration apparatus and liquid sealing type anti-vibration apparatus unit

Abstract

A liquid-sealed anti-vibration apparatus capable of sufficiently reducing abnormal noise while obtaining low dynamic spring properties in inputting vibration with rather small amplitude and a liquid-sealed anti-vibration apparatus unit are provided. Since an elastic partition membrane (10) is displaced in a reciprocating mode, a hydraulic pressure fluctuation between both liquid chambers (6A) and (6B) is absorbed to provide the low dynamic spring properties. Moreover, since a first metal mounting part(1) is formed as a vehicle body frame side connection mechanism connected to a vehicle body frame side, and a second metal mounting part (2) is formed as a vibration generating body side connection mechanism connected to an engine side, a part of a vibration transmission route from a partition mechanism (7) to a vehicle body frame (BF) can be formed of a main anti-vibration body (3). As a result, even if vibration occurs in the partition mechanism (7) due to the collision of the elastic partition membrane (10) with a plate member, the occurrence of the abnormal noise can be remarkably reduced by securely suppressing the transmission of the vibration to the vehicle body frame by the vibration isolating effect of the main anti-vibration body (3) forming the part of the vibration transmission route.

Description

technical field [0001] The present invention relates to a liquid-encapsulated anti-vibration device and a liquid-enclosed anti-vibration device unit, in particular to a liquid-enclosed anti-vibration device capable of obtaining low dynamic spring characteristics and sufficiently reducing noise when a vibration with a small amplitude is input, and Liquid-encapsulated anti-vibration unit. Background technique [0002] Liquid-encapsulated anti-vibration devices are known as anti-vibration devices that support and fix vibration-generating bodies such as engines and transmissions of automobiles while preventing the vibrations from being transmitted to the vehicle frame. [0003] As such a liquid-encapsulated anti-vibration device, generally, both the first mounting member mounted on the engine side and the second mounting member mounted on the frame side pass through a main vibration-isolating body made of a rubber-like elastic body. connected. In addition, the liquid sealing c...

AI Technical Summary

Problems solved by technology

[0011] However, in the above conventional structure, there is a problem that the noise generated by the collision between the elastic separation membrane and the displacement limiting member cannot be sufficiently reduced.

In addition, the above-mentioned existing structure also has the problem that the elastic separation film cannot be moved back and forth efficiently, and a good low dynamic spring characteristic cannot be obtained.

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