Autoliv Development Ab

G&uuml;nter Clute

Klaus-Peter Singer

Enno Witfeld

Alois Juchem

Frank Fugel

Peer Gross

A safety belt arrangement is provided that has a belt retractor that includes a force-limiting device. When triggered in a collision, the belt retractor is associated with limited belt release therefrom. Associated with the belt retractor is a tensioning device that is actuated subsequent to the primary collision and that eliminates slack in a belt that occurs when the force-limiting device is triggered during the primary collision.

Safety belt system with pre-tensioning device for secondary collision

The invention relates to a belt retractor ( ) with a switchable force limiter. Said belt retractor ( ) comprises as the force limiter at least one energy absorbing element ( ) that is linked with the reel shaft ( ) and with the locking device of the belt retractor ( ) via a profiled bead ( ). The belt retractor is further provided with a switch device with which the energy absorption is adjusted. The aim of the invention is to provide a switch device that functions independent of the transmission of power between the reel shaft and the torsion bar. Said switch device (latch ) is designed in such a manner that it can be switched at any time during the already existing energy absorption via the drive ( ) that is independent of the reel shaft ( ) and/or the switch device.

Belt retractor with switchable force limiter

A self-locking belt roller is provided and includes a belt winding shaft rotatably mountable in a housing, a profiled head, and a torsion rod which becomes operational to resist further extraction of a belt from the belt roller so as to effect thereby a first force limiting operation of the belt roller. The belt roller also includes a resistance facilitating element on the belt winding shaft or the profiled head and a deformation element for increasing the resistance force of the belt roller to further extraction of the belt either at the time before the actuation of the torsion rod to resist further belt unwinding or at the time during which the torsion rod resists further belt extraction. The deformation element is engaged by the resistance facilitating element during further rotation of the belt roller in a manner to increase the resistance of the belt roller to further extraction of the belt.

Self-locking belt roller having two retraction force limiting elements

A self-locking belt roller has a housing and a belt winding shaft rotatably mounted in housing. A torsion rod has a first end connected in the belt winding shaft. A profile head is connected to a second end of the torsion rod. A blocking member, that is vehicle-sensitive and/or belt-sensitive, is mounted on the profile head and moveable into a locking position at the housing in which rotation of the belt winding shaft is blocked. An energy-dissipating structure is positioned within a force transmission path, including the profile head, the torsion rod, and the belt winding shaft, for increasing a restraining force before the torsion rod becomes effective or simultaneously to the torsion rod becoming effective and for obtaining a degressive force characteristic curve.

Belt roller with damped force limiter

A self-locking belt retractor has a belt reeling shaft having a belt connected thereto. A locking device, activatable in a vehicle sensitive and/or belt-sensitive manner for preventing belt removal from the belt reeling shaft is provided. The locking device has a locking member and a profiled head connected to the belt reeling shaft. The belt reeling shaft is locked when the locking member engages the profiled head. At least two force-limiting elements are arranged in parallel or in series to one another, wherein one of the force-limiting elements is a torsion bar allowing a limited belt removal when the locking device locks the belt reeling shaft. A switching device for selectively engaging at least one of the force-limiting elements is provided to thereby connect the belt reeling shaft and the profiled head. The switching device is switched between the force-limiting elements and the belt reeling shaft for adjusting the energy absorption of the belt retractor and adapting the belt retractor to pre-adjustable incidents of loading.

Growing community of inventors

Hamburg, Germany

Günter Clute

Growing community of inventors

Hamburg, Germany

G&uuml;nter Clute

Günter Clute