Hydraulic suspension

Abstract

The invention relates to a hydraulic suspension, which comprises a main spring, a flow passage, a platen, a metal skeleton, a bottom film, a decoupling membrane, an upper hydraulic chamber and a lower hydraulic chamber, wherein a plurality of through holes are formed in the places, which are opposite to the decoupling membrane, of the platen; a plurality of openings are formed in the places, which are opposite to the decoupling membrane, of the flow passage; a connecting line between the center of each opening and the center of through hole opposite to the opening is perpendicular to the decoupling membrane; the decoupling membrane is provided with bulges which outwards extend from the upper surface and the lower surface at the same time; the bugles are not opposite to the through holes. The through holes in the platen and in the flow passage are enabled to form a net structure; meanwhile, the bulges are added on the decoupling membrane to fix the decoupling membrane; the decoupling membrane can be effectively prevented from a large deformation quantity when being strongly impacted; the reliability problem of the decoupling membrane is solved.

Description

technical field [0001] The invention belongs to the field of automobile suspension, and specifically refers to a hydraulic suspension. Background technique [0002] For engine side mounts, in order to improve its vibration isolation performance at high frequencies, they are generally designed as hydraulic mounts. The main performance parameters of hydraulic mounts include dynamic-to-static ratio, dynamic stiffness at high frequencies, and large damping at low frequencies. Wait. Generally speaking, it is the stiffness of the decoupling diaphragm that affects the dynamic-to-static ratio, and it is the spoiler that affects the dynamic stiffness at high frequencies. Therefore, choosing a low-stiffness decoupling diaphragm is conducive to obtaining a smaller dynamic-to-static ratio and is conducive to isolating high-frequency and small-amplitude vibrations. However, the general low-stiffness decoupling diaphragm has low durability, especially for off-road vehicles, the road con...

AI Technical Summary

Problems solved by technology

[0008] 2) Although this kind of decoupling diaphragm has high rigidity and good durability, as the driving conditions of the vehicle increase and the service time increases, the decoupling diaphragm will still be damaged in some vehicles, which is not conducive to isolating low frequencies (especially is the vibration of the powertrain at 10-13Hz)

[0011] For pure rubber mounts, (1) there is dynamic hardening at high frequencies, which is not conducive to isolating high-frequency small-amplitude vibrations; (2) the damping is small at low frequencies, which is not conducive to isolating low-frequency large-amplitude vibrations

[0012] For hydraulic mounts (the decoupling diaphragm has cutouts), due to the cutouts, the damping at low frequencies will be small, which is not conducive to isolating low-frequency large-value vibrations

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