US 12,466,357 B2
Winding drum assembly
Wei Zhao, Shanghai (CN); Bin Chen, Shanghai (CN); and Yongliang Huang, Shanghai (CN)
Assigned to YANFENG INTERNATIONAL AUTOMOTIVE TECHNOLOGY CO., LTD., Shanghai (CN)
Filed by YANFENG INTERNATIONAL AUTOMOTIVE TECHNOLOGY CO., LTD., Shanghai (CN)
Filed on Aug. 11, 2023, as Appl. No. 18/232,960.
Claims priority of application No. 202210965237.8 (CN), filed on Aug. 12, 2022.
Prior Publication US 2024/0051496 A1, Feb. 15, 2024
Int. Cl. B60R 22/34 (2006.01); B60R 22/02 (2006.01); B60R 22/36 (2006.01); B60R 22/46 (2006.01)
CPC B60R 22/4671 (2013.01) [B60R 22/02 (2013.01); B60R 22/36 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A winding drum assembly, wherein the winding drum assembly comprises a winding drum, a gear mechanism and a force limiting mechanism, and wherein the winding drum for winding a safety belt extends in the axial direction and is rotatably supported in a frame of a retractor, and the gear mechanism is installed at one side of the winding drum through the force limiting mechanism and comprises a stop wheel and a ball gear which are riveted and fixedly connected in the axial direction, the stop wheel for locking the winding drum to rotate in the direction of pulling out the safety belt to limit the safety belt from being pulled out under a predetermined condition is rotatably installed on the frame, and the ball gear for driving the winding drum to rotate in the direction of retracting the safety belt to retract the safety belt to restrain passengers in an activated state comprises a penetrating shaft hole, and the force limiting mechanism is inserted into the shaft hole in the axial direction and both ends of the force limiting mechanism are respectively connected with the winding drum and the gear mechanism to prevent the passengers from being excessively restrained by realizing the force limiting function.