Belt retractor system
AssigneeTRW Automotive Electronics & Components GmbH & Co. KG
InventorsCornelius Peter, Rolf Dürrstein
Life of this patent
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Abstract
A belt retractor for an occupant restraint system comprises a frame, a belt reel rotatably mounted in the frame, an electric motor drive coupled to the belt reel, a locking mechanism for selectively blocking the belt reel, and a vehicle-sensitive sensor. The locking mechanism is actuated by an actuator. An electronic control unit is provided with an input interface and an output interface. The vehicle-sensitive sensor is connected to the input interface, and the actuator and the electric motor drive are connected to the output interface.
Claims8
A belt retractor for an occupant restraint system, comprising:
- a frame,
- a belt reel rotatably mounted in said frame,
- a locking mechanism for selectively blocking said belt reel,
- a vehicle-sensitive sensor,
- an actuator for actuating said locking mechanism,
- an electric motor by which said belt reel is drivable,
- an electronic control unit including an input interface and an output interface,
- said vehicle-sensitive sensor being connected to said input interface, and said actuator and said electric motor being connected to said output interface.
- said control unit signaling said electric motor to provide a belt tensioning when the signal constellation of a plurality of sensors connected to said input interface indicates an imminent vehicle collision,
- said electric motor comprising a 14-pole outside rotor,
- said electric motor being coupled by a toothed belt to said belt reel,
- said toother belt coupling a drive pinion of said electric motor to a gearwheel side-mounted on said belt reel, said gearwheel having a diameter larger than that of said drive pinion,
- said electric motor being supported on a support plate side-mounted to a leg of said frame so as to be capable of pivoting to a limited extent and, by pivoting of said support plate, said toothed belt being pressed in a section between said gearwheel and said drive pinion against a tensioning pulley mounted on said leg of said frame.
The belt retractor as set forth in 4, wherein said control unit loads aid belt reel via said electric motor with a permanent retraction moment, the value of which can be varied across said absolute angle of which can be reel.
An occupant restraint system for vehicles comprising a plurality of belt retractors, each belt retractors of said plurality of belt retractors comprising:
- a frame,
- a belt reel rotatably mounted in said frame,
- a locking mechanism for selectively blocking said belt reel,
- a vehicle-sensitive sensor,
- an actuator for actuating said locking mechanism,
- an electric motor by which said belt reel is drivable,
- an electronic control unit including an input interface and an output interface,
- said vehicle-sensitive sensor being connected to said input interface, and said actuator and said electric motor being connected to said output interface,
- said control unit signaling said electric motor to provide a belt tensioning when the signal constellation of a plurality of sensors connected to said input interface indicates an imminent vehicle collision,
- said electric motor comprising a 14-pole outside rotor,
- said electric motor being coupled by a toothed belt to said belt reel,
- said toothed belt coupling a drive pinion of said electric motor to a gearwheel side-mounted on said belt reel, said gearwheel having a diameter larger than that of said drive pinion,
- said electric motor being supported on a support plate side-mounted to a leg of said frame so as to be capable of pivoting to a limited extent and, by pivoting of said support plate, said toothed being pressed in a section between said gearwheel and said drive pinion against a tensioning pulley mounted on said leg of said frame.
Dependencies are inferred from the claim text.