Two-level vibration isolation hydraulic mount

Abstract

The invention discloses a two-level vibration isolation hydraulic mount comprising an inner core, a limiting cover, an anti-collision cover, a runner assembly and a connecting bolt. A rubber mainspring is arranged on the lower portion of the inner core. The outer side wall of the lower portion of the rubber mainspring is provided with a mainspring outer framework. The lower portion of the limiting cover is installed on the outer side wall of the mainspring outer framework in an interference pressing mode. The top of the limiting cover is installed at the top of the rubber mainspring in a pressing mode. The anti-collision cover covers the top of the limiting cover. A vibration isolation seat is arranged at the bottom of the rubber mainspring. A sealed liquid cavity is formed between the vibration isolation seat and the rubber mainspring and is divided into an upper liquid cavity body and a lower liquid cavity body through the runner assembly. The lower portion of the connecting bolt is arranged in a threaded hole in the upper portion of the inner core. The threaded hole communicates with the upper liquid cavity body through a liquid filling hole. The liquid filling hole forms interference sealing through a steel ball. According to the two-level vibration isolation hydraulic mount, the first level of vibration isolation is conducted on excitation vibration through the rubber mainspring and the runner assembly, the second level of vibration isolation is conducted through a vibration isolation spring on the vibration isolation seat after attenuation, and thus vibration energy transmitted onto a vehicle frame is lowered to the minimum.

Description

technical field [0001] The invention belongs to the technical field of auto parts and relates to a hydraulic mount, in particular to a hydraulic mount with two stages of vibration isolation for an engine. Background technique [0002] Nowadays, the control of noise and vibration of cars has always been a difficult problem for people, seriously affecting the comfort of the car. For this reason, people start to implement isolation control from the excitation source, such as using rubber mounts or hydraulic mounts. The cost of pure rubber mounts is relatively low and is widely used, but due to its low damping, the vibration isolation performance is poor; Ordinary hydraulic mounts adopt the form of an inertial channel decoupling membrane, which can produce greater damping at low frequencies and large amplitudes. At high frequencies, due to the effect of the decoupling membrane, the phenomenon of high-frequency dynamic hardening can be alleviated to a certain extent. Therefore, ...

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Problems solved by technology

[0002] Nowadays, the control of noise and vibration of automobiles has always been a difficult problem for people, which seriously affects the comfort of riding in the car.

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