Patent ID: 7650809
Filing Date: 2010-01-26
Classification: B62D,F16H,Y10T

Abstract:
1. An electrical steering system for a motor vehicle, comprising: an electric motor; an input shaft; a worm gear system including a worm and a worm wheel coupled to the input shaft; an elastic compensating coupling adapted to transmit torque and including coupling parts to be coupled to each other, a first coupling part being the worm wheel and a second coupling part being a flange rotatably fixedly connected to the input shaft, wherein the elastic compensating coupling includes at least one elastic spacer arranged to space the coupling parts from each other in axial, radial and tangential directions and to couple the coupling parts to each other, at least one of (a) the first coupling part and (b) the second coupling part including contact surfaces arranged to exert axial, radial and tangential pressure forces during operation on corresponding contact surfaces of the spacer, wherein one of (a) the first coupling part and (b) the second coupling part includes at least one stud adapted to engage with axial, radial, and tangential positive clearance in a larger recess of the other one of (a) the first coupling part and (b) the second coupling part, the stud and the recess configured to form mutual limit stops at a certain torque in accordance with a corresponding elastic deformation of the spacer after overcoming the positive tangential clearance.