Pre-tightening and force-limiting safety belt and pre-tightening and force-limiting anti-attenuation mechanism thereof

Abstract

The invention discloses a pre-tightening and force-limiting anti-attenuation mechanism of a pre-tightening and force-limiting safety belt. The pre-tightening and force-limiting anti-attenuation mechanism comprises a mounting disc, a ratchet wheel which is rotatably arranged in the mounting disc, a pre-tightening wheel which is rotatably arranged in the mounting disc and is connected with the bottom end of the ratchet wheel to form a whole body, and an instantaneous transmission mechanism which is communicated with the circumferential direction of the mounting disc and is used for transmittinga driving force to the pre-tightening wheel when the safety belt needs to be tightened, wherein the ratchet wheel is connected with a winding shaft for winding the safety belt. Therefore, the pre-tightening wheel is connected with the ratchet wheel to form the whole body; when the instantaneous transmission mechanism transmits the driving force to the pre-tightening wheel, the pre-tightening wheelcan drive the ratchet wheel to rotate synchronously, and the ratchet wheel is connected with the winding shaft, so that the winding shaft is driven to rotate synchronously, and furthermore, the safety belt is rapidly wound; the safety belt is rapidly tensioned and a passenger in a vehicle is fastened on a seat. The invention further discloses the pre-tightening and force-limiting safety belt andthe pre-tightening and force-limiting safety belt has the beneficial effects above.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a pre-tightening force-limiting anti-attenuation mechanism of a pre-tightening force-limiting safety belt. The present invention also relates to a pre-tightening force-limiting safety belt comprising the above-mentioned pre-tightening force-limiting anti-attenuation mechanism. Background technique [0002] With the development of the automobile industry, more and more auto accessories have been widely used. [0003] Taking the car seat belt as an example, the car seat belt is a safety device for restraining the occupant in the event of a collision, and avoiding secondary collisions between the occupant and the steering wheel and instrument panel during the collision, or preventing the occupant from rushing out of the vehicle during a collision and causing death or injury. The car seat belt can also be called the seat belt, which is a kind of occupant restraint device. Car se...

AI Technical Summary

Problems solved by technology

[0007] However, in the prior art, the ring gear is used to drive the spool gear to rotate. Although the seat belt can be tightened quickly, it still needs the ring gear to move a certain distance before meshing with the spool gear, and then the explosive driving force can be smoothly released. Transmission to the reel gear, during which there is a certain vacuum period of power transmission. For the moment when every second counts, the impact of this vacuum period is very important, which seriously affects the safety of the people on board

In addition, the inner space of the storage box of the safety belt is narrow, and the ring gear and the spool gear in the prior art are respectively arranged on the mounting surface, which needs to occupy a large space

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