Autoliv Development Ab

Thomas Schneider

Martin Schmidt

Stefan Suhr

Stefan Bösch

Thomas Schmidt

Michael Pech

Erne Frey

Stefan Hofs

Miriam Ors

Santi Gasol

Jordi Casiano

Kay Löffler

A combination of belt retractor and belt pre-tensioner in which the pre-tensioning device is coupled to the belt shaft by means of the vehicle-sensitive or belt strap sensitive locking system of the belt retractor, is characterized in that a lever () entrained by the drive wheel () on its rotation in the pre-tensioning direction is mounted pivotally on the housing and on its pivoting movement effected by the rotation of the drive wheel () its free end () comes into engagement with the control disc () and in so doing, over part of its pivoting movement, drives the control disc () for its relative rotation relatively to the belt shaft and after the lever () has passed through its pivoting path serving to drive the control disc () it is released from the control disc () and the drive wheel ().

Coupling system between pre-tensioning wheel and seat belt retainer spool

The invention relates to a seat belt retractor including a pretensioner especially for use in motor vehicles. The seat belt retractor includes a spool belt which supports belt webbing of the seat belt and rotates in the take-up direction of the safety belt when the pretensioning drive coupled to the belt spool is activated. The belt spool is associated with a drivewheel with recesses on the periphery thereof for accepting mass bodies acting as drive means for pretensioning the seat belt. The mass bodies are stored in a tube, which tangentially flows into the drivewheel, and the mass bodies are accelerated in the tube by means of a gas generator arranged at one end of the tube.

Seat belt retractor and pretensioner combination

In at least one embodiment of the present invention a seat-belt retractor is provided. The seat-belt retractor comprises a locking system that is controlled by means of at least one vehicle-sensitive sensor. The sensor has an alignment mass for autonomous alignment and is configured to pivot on the seat-belt retractor when the angular installation position of the seat-belt retractor is changed and when the seat-belt is extended, the sensor can be fixed in position by a blocking device. The blocking device is friction-controlled by the rotation of the belt shaft in the extension direction. The blocking device includes a rotatably mounted blocking lever which can be displaced into a release position for the sensor by a control lever that is coupled to the belt shaft by a friction coupling when the belt shaft rotates in a retraction direction.

Seat-belt retractor

A self stopping seat belt retractor is provided with a belt shaft for winding a seat belt thereonto and unwinding a wound seat belt therefrom and a housing rotatably supporting the belt shaft and having a locking device that includes a locking means for the belt shaft that can be controlled in a vehicle sensitive and/or belt sensitive manner into engagement with a toothed gearing system on that side of the housing. A tightening device operating on the belt shaft includes a drive wheel, which is, prior to the release of the tightening device, secured in a force-transmitting manner on the housing, is connectable upon release of the tightening device with the belt shaft, whereby the drive wheel of the tightening device is connectable via the locking device with the belt shaft for the transmission of force to the belt shaft.

High performance tightener

Growing community of inventors

Husum, Germany

Thomas Schneider