Seat belts controlled by magnetorheological force limiters

Abstract

A safety belt controlled by a magneto-rheological load limiter comprises a lock buckle, a lock tongue, a woven belt, a locking device, a connecting plate, a sliding block, the magneto-rheological load limiter, an electric controller, an electronic control unit, a woven belt force sensor, an electronic control switch and a fixed sleeve. The magneto-rheological load limiter mainly comprises a cylinder body, an electromagnet piston, a piston rod, a sealing partition plate and magneto-rheological fluid. The magneto-rheological load limiter adopts the magneto-rheological control mode, can intelligently control the tensioning degree of the woven belt in the locking device according to the vehicle speed, the acceleration speed of the woven belt, the inclination angle of a vehicle body and the constraining force on the human body, can constrain the human body to a seat as soon as possible in emergency circumstances, can intelligently control the woven belt for providing appropriate constraint force for controlling the deceleration of the human body according to the physiological limit of the human body and can protect the human body against constraint injury caused by the woven belt.

Description

technical field [0001] The invention relates to an automobile safety belt, in particular to a safety belt controlled by a magneto-rheological force limiter. Background technique [0002] Since seat belts were invented and used, they have played a vital role in the passive safety of automobiles. Almost all traffic departments in various countries have made mandatory regulations on wearing seat belts while driving. At present, the types of vehicle seat belts include: composite sensitive seat belts, force-limiting seat belts, pre-tension force-limiting seat belts, and pre-rolled pre-tension force-limiting seat belts. [0003] The locker structures of these seat belts all adopt a mechanical structure, and the triggering method depends on the design value of the mechanical structure, that is, it cannot be reasonably adjusted and set according to specific road conditions and specific vehicles. And when the restraining effect of the seat belt occurs, the binding reaction force of ...

AI Technical Summary

Problems solved by technology

[0004] The force-limiting seat belt is based on the compound sensitive seat belt. A metal torsion bar is used in the lock to limit the binding force of the webbing. However, the torsion bar has a limited and irreversible force limit range. The occupant loses the restraint of the seat belt and is injured by colliding with the objects in the car, and this force-limiting seat belt torsion bar cannot be used again after deformation

[0005] Although the pre-rolled pre-tensioning force-limiting seat belt pre-tensions the seat belt by igniting the gunpowder to generate gas expansion and locking, after such a working method is used, the force-limiting locking mechanism for tensioning fails and cannot No replacement, the disadvantage of one-time use increases the user's use cost and wastes resources

This safety belt still can't control the damage of the webbing to the human body after the webbing is locked

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