公开(公告)号：EP3514022A1

公开(公告)日：2019-07-24

申请号：EP18152478.6

申请日：2018-01-19

申请人： TRW Polska Sp.z.o.o.

发明人： Suchanski, Damian ,  Krukowski, Krzysztof

IPC分类号： B60R22/34 ,  B60R22/46

摘要： A belt reel (10) for a belt retractor is provided, comprising a pinion (12) which is configured to be driven by a drive element in order to rotate the belt reel (10), and a spool (14) whereon a belt can be wound up by rotation of the belt reel (10), wherein a damping device (16) is provided between the pinion (12) and the spool (14), a torque being transmittable to the spool (14) by the pinion (12) and wherein the pinion (12) and the spool (14) are rotatably fixed with respect to each other when the torque transmitted to the spool (14) by the pinion (12) is below a threshold value and wherein a relative movement between the pinion (12) and the spool (14) is allowed due to a wedging effect being enabled by the damping device (16) when the torque transmitted to the spool (14) by the pinion (12) exceeds the threshold value. Furthermore, a belt retractor is provided, comprising a belt tensioning mechanism with a belt reel (10) and a drive mechanism being configured to rotate the belt reel (10) in order to wind up a belt, wherein the drive mechanism comprises a pyrotechnic gas generator (46) and an elongated elastic piston (32) which is configured to rotate the pinion (12) of the belt reel (10) by activation of the gas generator (46).