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汽车安全与节能学报

汽车安全与节能学报 ›› 2014, Vol. 5 ›› Issue (03): 252-256.DOI: 10.3969/j.issn.1674-8484.2014.03.005

• 汽车安全 • 上一篇    下一篇

正碰中安全带集中对胸部变形量影响及D 环的改进

商恩义，鞠春贤，蒋斌庆，秦佳佳   

  1. 长城汽车股份有限公司技术中心，河北省汽车工程技术研究中心，保定 071000，中国
  • 收稿日期:2014-01-06 出版日期:2014-09-25 发布日期:2014-10-08
  • 作者简介:商恩义(1972 － )，男( 满)，上海，工程师。E-mail: shangenyi@163.com

Influence of the safety belt collecting on chest deflection in frontal impact tests and the D-ring improvement

SHANG Enyi, JU Chunxian, JIANG Binqing, QIN Jiajia   

  1. Great Wall Motor Technology Center, Hebei Auto Engineering Technology Research Center, Baoding 071000, China
  • Received:2014-01-06 Online:2014-09-25 Published:2014-10-08

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摘要： 在汽车正碰试验中，在安全带高度调节器的上部导向环(D 环) 处，常发生安全带集中现象，
这使得假人胸部伤害加重。对某款车，进行了2 次台车试验: 一次是安全带动作正常，另一次是D 环
处安全带发生集中。试验研究了D 环摩擦力、肩带力、假人胸部变形量、假人胸部刚度。结果表明：
安全带集中, 导致了D 环摩擦力增大，肩带力增加500 N ；肩带力快速的上升，降低了假人胸部刚度；
胸部变形量提高约20%。因此，为防止安全带集中，新的安全带结构设计时，应尽量减小D 环摩擦力。

关键词: 汽车工程, 被动安全, 安全带, 上导向环(D 环) , 安全带集中, 摩擦力, 胸部刚度, 胸部变形量

Abstract: In vehicle frontal impact tests, the safety belt collecting, which normally appears at the upper guide
ring (D-ring) of a safety belt height adjuster, causes severe dummy chest injuries. Two sled tests were conducted
for a vehicle. In one test, the belt acted normally, and in the other test, the belt had collection on the D-ring.
The friction forces, the shoulder belt forces, the chest deflections, and the chest rigidity were measured in the
tests, and then analyzed. The results show that the safety belt collecting enhances D-ring friction force with the
shoulder force increasing by 500 N and the shoulder belt force rising quickly, which makes dummy chest rigidity
decrease, with the dummy chest deflection raising about 20%. Therefore, a new safety belt structural design
should reduce D-ring friction force to prevent safety belt collecting.

Key words: automobile engineering, passive safety, safety belt, upper guide ring (D-ring), safety belt collecting, friction force
chest rigidity, chest deflection

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