Archimedes spiral channel based controllable magneto-rheological grease buffer

Abstract

The invention discloses an Archimedes spiral channel based controllable magneto-rheological grease buffer, comprising a magneto-rheological damper and a hollow collision-bearing component. The magneto-rheological damper is provided with an Archimedes spiral channel; the hollow collision-bearing component can be collided to deform; the hollow collision-bearing component is communicated with the head end of the Archimedes spiral channel; and the tail end of the Archimedes spiral channel is provided with a rheological exhausting port. Because the magneto-rheological damper adopts the Archimedes spiral channel, the length of a flow path is increased, and because the magneto-rheological damper adopts the electromagnetic effect, the buffering force can be controlled. Under the condition that the overall length of the buffer is not changed, the length of the magneto-rheological damper adopting the Archimedes spiral channel can be reduced greatly, the axial deformation space of the buffer can be increased greatly hereby, and the colliding buffering efficiency can be increased. With the long damping channel, the controllable magneto-rheological grease buffer has good buffering performance, higher collision strength, good active control performance and reasonable magneto-rheological grease adjusting damping coefficient so that the collision hardness of the buffer can be adjusted.

Description

technical field [0001] The invention relates to a buffer controllable device used in an automobile collision safety system, in particular to a collision buffer using magneto-rheological grease. Background technique [0002] Vehicle collision is a relatively common safety accident in road traffic, which generally causes serious personal and property losses. [0003] In the prior art, the commonly used safety protection device for slowing down vehicle collisions is a passive collision bumper, which belongs to a safety device that passively absorbs and eases external impact forces and protects the front and rear of the vehicle body. The front and rear bumpers of early cars were mainly made of metal materials, which were punched into U-shaped channel steel with a steel plate with a thickness of more than 3 mm, and riveted or welded with the frame longitudinal beam. With the development of the automobile industry, automobile bumpers are constantly updated and improved as an impo...

AI Technical Summary

Problems solved by technology

However, the above bumpers belong to the category of passive safety systems, and cannot achieve active and controllable absorption and ease of external impact forces. Therefore, although they have a certain buffering effect, they cannot achieve a good energy absorption and buffering effect. Safety accidents caused by accidents cannot achieve better prevention and protection effects; at the same time, the bumper will be significantly damaged after a heavy impact, and will continue to cause damage to the vehicle and the person after the damage

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