Patent ID: 8235166
Filing Date: 2012-08-07
Classification: B62D

Abstract:
1. A speed superimposition device for a vehicle steering system having: an output shaft which aligned, in an axial direction, towards an input shaft, a first carrier arrangement configured to rotatably position the output shaft and the input shaft such that the output shaft or the input shaft is at least partly supported, an auxiliary drive with a rotor which is connected in an operative, torque-proof manner to a first gear element of a superimposition gear unit, and a second carrier arrangement which is arranged in a fixed manner on a chassis, and which holds the auxiliary drive and supports the rotor so that the rotor is enabled to rotate, wherein the rotor of the auxiliary drive coaxially surrounds the output shaft, the input shaft, or both, wherein the superimposition gear unit is configured to transmit rotational speed of the rotor to the output shaft at a rotational speed ratio that is less than 1, and further comprising: an intermediate piece formed from a material having elastic and damping properties arranged between the rotor and the first gear element in such a way that the rotor is connected in an operative manner to the first gear element in the rotational direction only by interconnecting the intermediate piece.