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force limiter

A retractor and force-limiting technology, applied in belt tighteners and other directions, can solve problems such as cost reduction, and achieve the effects of reducing the number of components, reducing weight, and reducing volume

Active Publication Date: 2020-07-28
天合汽车研发(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

cut costs

Method used

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Embodiment Construction

[0051] Embodiments of the force-limiting retractor according to the present invention will be described below with reference to the accompanying drawings. The description and drawings are exemplary in nature, provided to enable a person skilled in the art to make and use the force limiting retractor described, and are not intended to limit the scope of protection of the appended claims in any way.

[0052] As used herein, the terms "comprising", "comprising" and "having" are intended to be inclusive and mean that additional elements may be present other than the listed elements. The term "retractor" means a device for fully retracting or partially retracting the seat belt webbing. The term "reel drum" refers to the cylindrical assembly on the retractor used to wind the webbing. The term "coil spring assembly" refers to the device on the retractor used to provide torque. The term "coil spring" refers to a leaf spring coiled in a coil spring assembly with a hook in the center ...

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Abstract

The invention relates to a force limiting retractor which comprises a spring winding assembly, a force limiting rod, a belt winding barrel, a motion stop wheel, a U-shaped frame assembly and a mechanical side cover. The force limiting retractor further comprises a detachable force limiting component, and the force limiting component is detachably installed on the belt winding barrel and rotates along with the belt winding barrel to form a rotary path. A motion stop component is arranged on the motion stop wheel and arranged on the rotary path of the force limiting component. When the belt winding barrel rotates relative to the motion stop wheel, the force limiting component can be jointed with the motion stop component selectively to form a force limiting effect. By the adoption of the force limiting retractor, functions of a common type force limiting retractor, a progressive increase type force limiting retractor and a progressive decrease type force limiting retractor are integrated, the design, research and development cost is effectively reduced, it is unnecessary to design a special retractor structure and a special retractor mechanism for a single force limiting function. Meanwhile, the structure is more compact, the structures of parts are simple, the design size is reduced compared with the traditional design size, dimension chain superposition is reduced, and the quality risks are reduced.

Description

technical field [0001] The invention relates to a force-limiting retractor with a force-limiting function for a safety belt of a vehicle. 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 basis o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R22/46
Inventor 伏春波
Owner 天合汽车研发(上海)有限公司
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