公开(公告)号：US07140571B2

公开(公告)日：2006-11-28

申请号：US10459353

申请日：2003-06-11

Applicant: Michael K. Hishon ,  Samuel D. Engler ,  Krzysztof W. Karwaczynski

Inventor： Michael K. Hishon ,  Samuel D. Engler ,  Krzysztof W. Karwaczynski

IPC: B65H75/48

CPC classification number: B60R22/44 ,  B60R21/0155 ,  B60R22/46 ,  B60R2022/4473 ,  B60R2022/4666

Abstract: An electric retractor extracts and retracts a seat belt in response to tension in the seat belt. The electric retractor may include a spool rotatably attached to a retractor frame. A seat belt is wound on the spool. The spool is rotated by a motor via a worm gear system that permits limited axial motion of the worm, but generally prevents the motor from being back-driven by tension in the seat belt to prevent forced seat belt extraction. The gear system may also cut off power to the motor in the event of excessive seat belt tension to prevent further payout of the seat belt. A senses tension in the seat belt and activates the motor to retract or extract the seat belt from the retractor. An emergency control system may override the web guide control in response to abnormal vehicle dynamics to provide reversible pre-crash pretensioning and/or crash pretensioning.

Abstract translation: 电牵引器响应于安全带中的张力而提取和缩回安全带。 电牵引器可以包括可旋转地附接到牵开器框架的线轴。 安全带缠绕在阀芯上。 卷轴由马达通过蜗轮系统旋转，允许蜗杆的有限的轴向运动，但是通常防止马达被安全带中的张力反向驱动以防止强制的安全带提取。 在安全带张力过大的情况下，齿轮系统还可以切断电动机的动力，以防止安全带的进一步支出。 感觉到安全带上的张力，并启动电机从牵开器收回或取出座椅安全带。 应急控制系统可以响应于异常车辆动力学来覆盖卷筒纸引导控制，以提供可逆的预碰撞预张紧和/或碰撞预张紧。