Patent ID: 7357048

Claim:
A ball screw drive comprising a spindle nut that can be disposed on a spindle, said spindle nut comprising on an inner periphery, a ball groove that is arranged along a helix and defines a load-bearing channel for balls, an external deflector arranged outside of the outer circumference of the spindle nut connecting two ends of the load-bearing channel endlessly to each other for deflecting the balls from one of the two ends of the load-bearing channel to the other of the two ends of the load-bearing channel, a drive pinion for driving the spindle nut being arranged on the spindle nut, and the external deflector being arranged within the axial length of the drive pinion wherein the drive pinion is constituted by a toothed belt wheel which comprises a toothed rim that comprises an outer gearing and defines an annular space which is configured within the toothed belt wheel, the external deflector being arranged in said annular space between the outer circumference of the nut and the inner circumference of the toothed rim to protect the external deflector.