Torsion bar with effective energy-absorbing function

Abstract

The invention discloses a torsion bar with an effective energy-absorbing function, aiming at overcoming the defect of the prior art and providing the torsion bar which has good energy-absorbing effect, simple manufacture and low cost, can effectively control the release distance of a weaving belt and is used for a safety belt. The torsion bar comprises a bar body, a bar cap and an energy-absorbing expansion pipe, wherein the bar body and the bar cap are connected by the screw threads of the bar body; the shape of the tail part of the bar body is matched with the hollow shape of a mandrel of the safety belt; and the energy-absorbing expansion pipe is sleeved on an expansion bar of the bar body. When an automobile collides and the weaving belt of the safety belt is pulled out by a passenger, the mandrel of the safety belt drives the bar body to rotate, relative rotation between the bar body and the bar cap at that time can generate expansion pressure to the energy-absorbing expansion pipe between the bar body and the bar cap, and the energy-absorbing expansion pipe is extruded to deform, thereby the energy is absorbed. Because part of impact energy is absorbed, the safety of the passenger is enhanced. The invention is especially suitable for the safety belt, especially the fittings of the energy-absorbing safety belt of the automobile.

Description

technical field [0001] The invention relates to accessories of safety belts, in particular to a torsion bar with high-efficiency energy-absorbing function. technical background [0002] In order to improve the safety protection effect of the seat belt, a torsion bar is installed in the mandrel of the retractor, and the impact force of the occupant can be absorbed through the deformation of the torsion bar to reduce the damage to the occupant in an accident. The invention of the application number 99106998.6 titled "A device comprising at least two torsion bars to limit the force in the seat belt retractor" announced by the Chinese Patent Office on December 15, 1999, adopts two torsion bar devices to absorb the impact of the occupant; Such as the torsion bar energy-absorbing that the invention of the application number 200480027950.8 invention title "Self-Locking Seat Belt Retractor" announced by the Chinese Patent Office on 2006.11.01 adopts. These inventions have all achie...

AI Technical Summary

Problems solved by technology

However, the current torsion bars must be used after the car is installed with an airbag, because these torsion bars cannot control the number of rotations. Once the occupants cannot be controlled, if they exceed a certain distance, they will collide with the front of the car and cause injury. Instead, it fails to protect

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