Magnetorheological elastomer collision buffering energy absorber with variable magnetic circuit

Abstract

The invention relates to a magnetorheological elastomer collision buffering energy absorber with a variable magnetic circuit. The energy absorber comprises a front end cover, a spiral spring, control lines, a controller, a first excitation coil, a second excitation coil, a force transducer, a signal wire, a shell, a magnetorheological compression unit, a magnetorheological cutting unit and an excitation iron core, wherein the front end cover is connected with the shell through the spiral spring; the controller is connected with the first excitation coil and the second excitation coil through the control lines, and is connected with the force transducer through the signal wire; the force transducer is arranged between the bottom of the shell and an automobile beam, the second excitation coil is preset in the magnetorheological cutting unit, an inner ring of the magnetorheological cutting unit is connected with the excitation iron core, and an outer ring is connected with the shell; and the first excitation coil is placed in the shell, the magnetorheological compression unit is connected with the center position of the bottom of the shell, and the front end cover is fixedly connected with a front bumper. The energy absorber has the characteristics of adjusting structural rigidity in real time, and fully giving full play to the characteristics of cutting and compression of a magnetorheological elastomer, and can reasonably absorb and manage collision energy under the complicated collision working condition.

Description

(1) Technical field [0001] The invention relates to a magneto-rheological elastomer collision buffer energy-absorbing device with a variable magnetic circuit, in particular to an automobile collision buffer energy-absorbing device and an energy management method using a new type of intelligent material—magnetorheological elastomer. It is used to replace the traditional crash box structure and is used for energy absorption and management during low-speed collisions. The invention belongs to the technical field of automobile collision passive safety protection. (2) Background technology [0002] Crash safety has always been an important topic in the field of automotive design. When a car has a frontal low-speed collision, the bumper assembly at the front of the vehicle is used to fully absorb the collision kinetic energy and reduce the maximum impact force to ease the impact. Bumpers can be divided into non-energy-absorbing and energy-absorbing types according to their funct...

AI Technical Summary

Problems solved by technology

Bumpers can be divided into non-energy-absorbing and energy-absorbing types according to their functions: 1. Non-energy-absorbing bumpers have poor cushioning and energy-absorbing capabilities, and basically only play a decorative role. Currently, they are only used in some light passenger cars; 2. The energy-absorbing bumper mainly absorbs and dissipates collision energy through deformation of metal materials or hydraulic damping, but its stiffness is fixed and it is not self-adaptive

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