Winder for safety belt and vehicle

Abstract

The invention relates to a winder for a safety belt and a vehicle. The winder comprises a frame used for being installed on the vehicle body of a vehicle, a support arranged on the frame, a pre-tensioning mechanism arranged on the support, a winding gear and a locking gear which are connected with a winding drum and can rotate integrally, and a locking mechanism used for preventing the winding drum from rotating in the direction of pulling out the safety belt, and the winding drum is rotatably arranged on the frame. The pre-tensioning mechanism comprises a driving part and a pre-tensioning gear used for transmitting power of the driving part, the pre-tensioning gear is used for being matched with the winding gear, the locking mechanism comprises a stopping piece, a driving piece and a clamping jaw, the stopping piece is rotatably arranged on the support, the clamping jaw is rotatably arranged on the frame, and the driving piece is used for providing driving force for clamping the clamping jaw and the locking gear. Before the pre-tensioning mechanism is not started, the stopping piece stops the linkage piece to limit rotation of the linkage piece, and after the pre-tensioning mechanism is started, the driving part drives the winding gear to rotate and also drives the stopping piece to move so as to release locking of the linkage piece by the stopping piece.

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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