Magnetorheological shock absorber with external coil

Abstract

The invention discloses relates to a magnetorheological shock absorber with an external coil. The magnetorheological shock absorber comprises a hydraulic cylinder body, a floating piston, a piston, a piston rod, a sealing cover, a coil, an external cylinder barrel, dustproof rings, an external end cover, a bottom limit element, a nut and a sleeve, wherein the floating piston plays a role of separating a compensation gas chamber from a hydraulic cavity; the piston is connected with the piston rod, and a bottom end is fixed to the bottom limit element through the nut; the bottom limit element is fixedly connected with the external cylinder barrel; the sleeve externally sleeves the hydraulic cylinder body; a bipolar coil is arranged in the sleeve; the dustproof rings are installed at the two ends of the sleeve; the piston is located at the central position of the bipolar coil; and during working of the shock absorber, the hydraulic cylinder body carries out reciprocating motion relative to the external cylinder barrel and the piston, and the magnitude of a magnetic field passing through a damping channel between the piston and the hydraulic cylinder body can be controlled through controlling a current of the external coil, so that the characteristic of a magnetorheological liquid is changed, and a purpose of controlling a damping force is achieved. The structure is convenient to install and simple in structure, production and maintenance costs are lowered, and a long service life is achieved.

Description

Technical field [0001] The invention belongs to the technical field of automobile vibration reduction, and in particular relates to a magnetorheological shock absorber with an external coil. Background of the invention [0002] With the continuous popularization and application of automobiles, consumers' requirements for automobiles are also increasing, and the comfort and stability of automobiles are increasingly concerned. In order to improve the driving comfort and handling stability of automobiles, researchers and major component suppliers continue to develop new automobile vibration damping technologies. Magnetorheological shock absorber as a kind of intelligent shock absorber with adjustable damping is more and more widely used in automobile suspension damping system. [0003] After more than 20 years of continuous research and improvement, the existing magnetorheological shock absorbers have been able to meet the requirements of vehicle design in terms of performance, but t...

AI Technical Summary

Problems solved by technology

[0003] After more than 20 years of continuous research and improvement, the existing magneto-rheological shock absorbers have been able to meet the requirements of vehicle design in terms of performance, but the lack of structure has increased the difficulty of processing and assembling the magnetorheological shock absorbers, thus Increased cost is not conducive to further popularization and application. For example, the piston structure of the magneto-rheological shock absorber introduced in the authorized patent CN201010621508.5 represents the structural characteristics of the existing magnetorheological shock absorber, that is, the piston is slotted circumferentially to arrange the coil. There is a long hole inside the piston rod to lead out the wire

This solution has a compact structure, but the piston structure is complex and difficult to process, especially the piston rod, the processing cost of the long hole is higher and there are many restrictions on structural optimization

At the same time, the shock absorber converts vibration energy into heat energy and dissipates it through damping, but the temperature rise will seriously affect the performance of the shock absorber

Because the coil is used to generate a magnetic field, the coil itself will generate heat. If the coil is arranged inside the hydraulic cylinder, the heat generated will further aggravate the temperature rise in the shock absorber and reduce the performance of the shock absorber.

Images