| 摘要 |
A belt pretensioner and force limiter in a vehicle, comprising a piston-cylinder device (1) with a cylinder chamber (2) containing an explosive charge (10). The piston (3) has a piston rod (4), which protrudes from the cylinder and is joined to a cable (24) which, via a drum (26) and a planetary gear set (27), drives a reel mechanism (28) for the belt in the winding-up direction when the explosive charge is detonated. The planetary gear set (27) is so disposed that the gear ratio is 1:1 between the drum (26) and the reel mechanism (28) when the drum (26) rotates in the winding-up direction and is geared up in the opposite direction so that the return movement of the piston (3) a certain distance in the cylinder (2) corresponds to a several times longer feed-out of the web from the reel mechanism (28). <IMAGE> |
