Rigidity-adjustable bushing

Abstract

The invention discloses a rigidity-adjustable bushing which comprises an inner barrel and an outer sleeve which are internally and externally coaxially mounted, the inner barrel is externally and coaxially provided with a magnetorheological elastomer, the magnetorheological elastomer and the outer sleeve are each provided with a plurality of iron cores, and each iron core is wound by a magnet exciting coil for providing a magnetic field; a bracket is embedded into the position between the corresponding iron core and the outer sleeve, and the end faces of the two sides of the corresponding iron core and the outer sleeve are provided with baffles; the magnetorheological elastomer is formed by curing a rubber base body and soft magnetic iron powder particles, a particle chain is distributed in the radial direction of the bushing, the current is adjusted so that the mechanical property of the current can be changed. The rigidity adjustable bushing is simple in structure, capable of overcoming the defects that a traditional hydraulic bushing is dynamically hardened and is poor in stability and the like and capable of achieving real-time adjustment of the optimal bushing rigidity and plays an active role in improving smoothness and operation stability of an automobile.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a bushing with adjustable stiffness for vehicle suspension. Background technique [0002] As a buffer element at the joint of the suspension, the bushing can reduce vibration and noise, make up for manufacturing tolerances, adjust the kinematics and elastokinematics characteristics of the suspension, etc. Reasonable bushing design can improve the handling stability, ride comfort and overall performance of the car. Different from the traditional suspension bushing, the existing suspension bushing with adjustable stiffness can strengthen the suspension to attenuate the vibration of a certain frequency or frequency range to a certain extent, but there are still some shortcomings, such as semi-active hydraulic The bushing structure is complex and its dynamic hardening is obvious, and the performance of the magnetorheological fluid (electrorheological fluid) semi-active...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical defects in the prior art, the present invention provides a suspension bushing with simple structure and continuously adjustable stiffness, which alleviates the dynamic hardening of traditional hydraulic bushings and overcomes the problem of magnetorheological fluid (or electrorheological fluid) semi-active The disadvantage of poor stability of hydraulic bushings is its fast response, simple structure and relatively low cost, which can realize real-time adjustment of optimal bushing stiffness, which has a positive effect on improving the ride comfort and handling stability of the car

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