A Two-stage Vibration Isolation Hydraulic Mount

Abstract

The invention provides secondary vibration-isolation hydraulic suspension, and belongs to the technical field of vehicles. The problem that existing secondary vibration-isolation hydraulic suspensionis poor in vibration-isolation effect is solved. The secondary vibration-isolation hydraulic suspension comprises a suspension bracket, and a suspension supporting arm, a rubber main spring and a vulcanized base are connected to the suspension bracket; a flow channel system is arranged in the rubber main spring, and the position, close to the vulcanized base, of the rubber main spring is providedwith a mass block; and the rubber main spring is provided with vibration-isolation rubber wrapping the mass block, and the suspension supporting arm, the rubber main spring, the mass block and the vulcanized base are fixedly connected into a whole and then are in interference fit with the suspension bracket. According to the secondary vibration-isolation hydraulic suspension, a secondary vibration-isolation structure composed of hydraulic vibration isolation and rubber vibration isolation is optimized, and the secondary vibration-isolation effect is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles and relates to a two-stage vibration isolation hydraulic mount. Background technique [0002] During the running of the car, the vibration of the engine is one of the main sources of body vibration. Existing cars usually use rubber mounts and hydraulic mounts to buffer and isolate engine vibration, but the vibration isolation effect of rubber mounts is poor, and the vibration isolation effect of hydraulic mounts is greatly improved compared with rubber mounts. In order to further improve the vibration isolation performance of the hydraulic mount, people began to add rubber vibration isolation to the hydraulic vibration isolation to form a secondary vibration isolation. [0003] For example, the Chinese patent [Application No. 201420045843.9; Authorization No. CN203805683U] discloses a two-stage vibration-isolation hydraulic suspension mechanism, which includes a rubber main spring connected t...

AI Technical Summary

Problems solved by technology

[0005] In the above-mentioned prior art, the second-level vibration isolation scheme of the hydraulic mount is realized: the first one is to arrange a rubber body in the connection hole where the rubber main spring cover and the vehicle body are connected. This scheme is only based on the hydraulic vibration isolation. An elastic vibration isolation is added at the connection, the two work independently, and even affect each other, resulting in poor vibration isolation effect

The second is to divide the vibration isolation seat into an upper frame and a lower frame, and set a vibration isolation spring and a leather cup between the upper frame and the lower frame. The upper frame, the lower frame, the vibration isolation spring and the leather cup are vulcanized as a whole through rubber. , this solution actually adjusts the structure of the vibration isolator, so that the vibration isolator has the function of elastic vibration isolation. Compared with the first solution, the combination of hydraulic vibration isolation and elastic vibration isolation is closer, but In the process of vibration transmission, there will still be overall instability, resonance may still occur in the process of vibration transmission, and the vibration isolation effect is not ideal

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