Plastic inner cage hydraulic bushing

Abstract

The invention discloses a plastic inner cage hydraulic bushing. The plastic inner cage hydraulic bushing comprises an outer frame, an inner frame, a damping rubber structure, a plastic inner cage, a limiting rubber structure and a limiting gasket, wherein the inner frame, the damping rubber structure and the plastic inner cage are sequentially and coaxially arranged from inside to outside; the plastic inner cage, the damping rubber structure, and the inner frame are integrated into a first combination through vulcanized bonding; the limiting rubber structure is annular and arranged at the topend of the outer frame; the limiting rubber structure and the outer frame are integrated into a second combination through vulcanized bonding; the limiting gasket is arranged at the top end of the limiting rubber structure; the first combination is arranged in the second combination. According to the plastic inner cage hydraulic bushing, the durability of the bushing can be improved, the cost is reduced, and the quality is stable and reliable.

Description

technical field [0001] The invention relates to a plastic inner cage hydraulic bushing. Background technique [0002] In recent years, with the increasing pressure on the manufacturing cost of the automobile industry, and the increase in the requirements for the comfort of the vehicle. All major OEMs use hydraulic bushings to reduce vibration and noise in key parts of automobile chassis. Due to the material and molding process, the traditional hydraulic bushing is contradictory in terms of durability, vibration damping performance, and cost. Among them, the more important inner cage support structure, on the one hand, affects the durability and performance of the hydraulic bushing, and at the same time plays a decisive role in the cost of the entire hydraulic bushing. [0003] see figure 1 , figure 2 , image 3 and Figure 4 , conventional hydraulic bushings have the following structures: [0004] (1) The outer frame 1' connected to the mounting holes of the control ...

AI Technical Summary

Problems solved by technology

[0014] The steel inner cage is mainly produced through the stamping forming process. The corresponding stamping mold is complex and costly, and stamping burrs are easy to be generated at the window position, which makes the vibration-damping rubber part of the hydraulic bushing easy to be cut by the stamping burrs during use, thus Cause hydraulic bushing to leak and fail

[0015] The aluminum inner cage is mainly produced by die-casting molding process, but due to the relatively brittle material characteristics of the die-casting aluminum inner cage, it is impossible to carry out shrinkage extrusion deformation treatment on the inner cage, so that the vibration-damping rubber itself cannot be extruded, resulting in reduced The tensile stress of the vibration rubber itself is relatively large, which reduces the fatigue life of the vibration damping rubber

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