Vehicle safety belt force-limiting retractor with incremental force-limiting function

Abstract

The invention discloses a vehicle safety belt force-limiting retractor with a progressive increase force limiting function. The force-limiting retractor comprises a winding drum, a stop wheel and a force-limiting retractor. The force-limiting retractor further comprises a detachable force limiting component; a fixing component used for fixing the force limiting component, an actuating component used for pushing the force limiting component and a guiding structure used for guiding the force limiting component are arranged on the stop wheel; a gradually reduced sliding chute is arranged on the winding drum, therefore, the progressive increase force limiting function can be realized by virtue of the sliding chute on the winding drum, which presses the force limiting component in the work process of the retractor.

Description

technical field [0001] The invention relates to a force-limiting retractor with incremental force-limiting function for vehicle safety belts. Background technique [0002] With the continuous increase of the number of motor vehicles in China, many motor vehicle users have put forward higher requirements for the power and economy of vehicles, and at the same time, they also require vehicles to have good safety. Vehicle safety strategies are mainly divided into active safety and passive safety. In passive safety systems, seat belts are one of the most important components. The use of seat belts has effectively saved about 45% of lives in traffic accidents, and prevented 67% of people from major injuries. When a motor vehicle collides, the impact force of ordinary seat belts on the chest of the occupant can be as high as 11KN or higher, and the chest compression of the occupant is relatively large, which is likely to cause greater damage to the occupant. Therefore, on the bas...

AI Technical Summary

Problems solved by technology

[0005] In the existing design, some force-limiting retractors use the blade to cut the material on the reel to achieve increment or decrement. However, in the process of cutting the material by the blade, since the reel is generally made by die-casting technology, if the die-cast Die-casting defects such as pores inside the material will affect the characteristic curve, and its force-limiting performance will be unstable

Moreover, since the tool will generate axial force during the material removal process, it is necessary to increase the assembly for fixing the stopper wheel and the reel, which will increase the cost of the assembly and make the structure more complicated

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