Patent ID: 7770688

Claim:
Rotational speed superposition device for a vehicle steering system with: an output shaft ( 4 ), which with respect to the input shaft ( 1 ) is oriented in its axial direction, a support configuration ( 8 ), which positions rotatably the input shaft ( 1 ) and the output shaft ( 4 ) at least partially bearing supported, an auxiliary drive ( 6 , 7 ) with a rotor ( 6 ), which is connected torsion tight with a wave generator ( 5 ), such as an oval disk, on whose periphery a flexible ring ( 2 ) with outertoothing is directly or indirectly supported, wherein its outer toothing meshes at least at two opposing circumferential points with an internal gear wheel ( 3 ), characterized in that the support configuration ( 8 ) is disposed stationarily on the vehicle body, the output shaft ( 4 ) is connected torsion tight with the internal gear wheel ( 3 ), the input shaft ( 1 ) is connected torsion tight with the flexible ring ( 2 ) with outer toothing, that the input shaft ( 1 ) and the output shaft ( 4 ) are supported freely rotatably independently of one another and that an adjustable locking mechanism ( 9 ) is provided for the optional blocking of the turning out of position of the rotor ( 6 ) with respect to the support configuration ( 8 ).