The seat belt is a wound and vehicle

Abstract

The present disclosure relates to a retractor for a seat belt and a vehicle. The winder includes a frame for being installed on the body of the vehicle, a support provided on the frame, a pre-tensioning mechanism provided on the support, a winding gear and a locking gear which are connected to the reel and can rotate integrally, and a locking mechanism for preventing the reel from rotating toward the direction of pulling out the safety belt, the reel is rotatably arranged on the frame, the pre-tensioning mechanism includes a driving part and a pre-tensioning gear for transmitting the power of the driving part, The pre-tightening gear is used to cooperate with the winding gear. The locking mechanism includes a stop piece, a driving part and a claw. The stop piece is rotatably arranged on the support, and the claw is rotatably arranged on the frame. The driving force that makes the claws engage with the locking gear. Before the pre-tensioning mechanism is activated, the stopper stops the linkage to limit its rotation. After the pre-tensioning mechanism is activated, the driving part drives the winding gear to rotate. At the same time, it also drives the stop piece to move to release the lock of the stop piece to the linkage.

Description

technical field [0001] The present disclosure relates to the technical field of vehicles, in particular, to a retractor for a safety belt and a vehicle. Background technique [0002] The existing safety belt winder has the devices of pyrotechnic pre-tensioning mechanism and mechanical sensor type locking mechanism at the same time. Under normal circumstances, when it is detected that the acceleration of pulling out the seat belt or the acceleration of the vehicle body exceeds the acceleration set by the mechanical sensor, the mechanical sensor locking mechanism will lock the webbing winding device to prevent the webbing from being pulled out. When the vehicle is in an emergency situation, such as a forward collision, the pyrotechnic pre-tensioning device will make the webbing winding device wind up in the direction opposite to the direction in which the webbing is pulled out, eliminating the slack of the webbing on the user's body. The pyrotechnic pre-tensioning mechanism a...

AI Technical Summary

Problems solved by technology

But there are two disadvantages in this scheme: one, in order to realize the positioning of the stop lock in all directions, the volume of the stop lock must be set large enough, and the stop lock needs to rotate a certain angle to avoid the rotation of the locking pawl. position, which requires a large fan-shaped space reserved for this mechanism, resulting in a larger seat belt winder; second, at a certain position, the friction plate will cut off the raised part of the stop lock and be The cut raised part will fall into the position of the winding shaft and other parts, which will easily affect the normal operation of related parts

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