Two-stage force limiting mandrel and retractor
A technology of retractor and mandrel, applied in the direction of belt tightener, etc., can solve the problems of complex structure, high cost, unfavorable mass production, etc., and achieve the effect of simplified assembly method, simple assembly and simple structure
Pending Publication Date: 2020-11-03
ZHEJIANG SONGYUAN AUTOMOTIVE SAFETY SYST CO LTD
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Problems solved by technology
[0006] The embodiment of the present application provides a two-stage force-limiting mandrel to solve the problem that the multi-stage force-limiting structure of the mandrel of the existing retractor is complex in structure, high in cost, and unfavorable for mass production
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[0051]In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.
[0052] The first embodiment of the present application provides a secondary force-limiting mandrel, which is arranged on a retractor and is used to limit the retraction of a safety belt of an automobile. figure 1 It is an exploded view of the secondary force limiting mandrel provided by the first embodiment of the present application. figure 2 It is a schematic diagram of an angle of the secondary force limiting mandrel provided by the first embodiment of the present application. image 3 It is a structural schemati...
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The invention discloses a two-stage force limiting mandrel and a retractor. The two-stage force limiting mandrel comprises a mandrel body, a lockable shaft head, a fixed block, a force limiting torsional spring, a force limiting rod and a limiting structure. One end of the force limiting rod is limited in the first containing groove of the mandrel body, and the other end of the force limiting rodis limited in the limiting groove of the lockable shaft head. The fixed block is inserted into a second accommodating groove in the end part of the mandrel body; the force limiting torsional spring isfixed to the lockable shaft head through a limiting structure and abuts against the fixed block. When the lockable shaft head is locked, the mandrel body drives the force limiting rod to rotate, andthe fixed block is synchronously driven by the mandrel body to rotate and bears the force limiting effect of the elastic force of the force limiting torsional spring. Compared with the prior art, allthe components are simple in structure and are assembled on the mandrel body in a clamping or inserting mode, the assembling mode of the multi-stage force limiting structure and the mandrel body is simplified, the structure based on all the components is simple, the components and the mandrel body are easy to assemble, and therefore the cost for manufacturing the mandrel of the retractor is reduced.
Description
technical field [0001] The present application relates to the technical field of automobile equipment, in particular to a secondary force limiting mandrel and a retractor. Background technique [0002] With the rapid development of the automobile manufacturing industry, users have higher and higher requirements for the safety performance of automobile seat belts. [0003] When a traditional emergency locking seat belt collides, the webbing of the seat belt will exert greater pressure on the occupant's chest, causing certain injuries to the occupant's chest. In order to improve the protection effect, the limited force seat belt was born. The retractor of the force-limiting seat belt has a force-limiting rod that can rotate at a specified torque. When a collision occurs, the seat belt retractor is locked, and the seat belt webbing stops being pulled out from the retractor. As the force acting on the seat belt webbing increases, the torque of the force limiting rod inside the...
Claims
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CPCB60R22/36
Inventor 施炳军赵轰
Owner ZHEJIANG SONGYUAN AUTOMOTIVE SAFETY SYST CO LTD