Patent ID: 7017437

Claim:
A ball screw drive comprising a spindle ( 1 , 18 ), a nut ( 3 , 15 ) surrounding the spindle ( 1 , 18 ), and balls ( 4 ) arranged between the spindle ( 1 , 18 ) and the nut ( 3 , 15 ), which balls ( 4 ) are in rolling contact with a screw track ( 2 ) formed on the spindle ( 1 , 18 ) and on corresponding screw tracks ( 1 , 9 , 10 , 12 ) formed on rings arranged within the nut ( 3 , 15 ), at least one of these rings forming deflecting region ( 13 , 20 ) for returning the balls ( 4 ) from a run-out end of a common turn of the screw tracks ( 7 , 9 , 10 , 12 ) to a run-in end of this turn, the screw tracks ( 7 , 9 , 10 , 12 ) of the rings arranged in the nut ( 3 , 15 ) being made on front faces of these rings, so that the screw tracks ( 7 , 9 , 10 , 12 ) of two adjacent rings define, together with the screw track ( 2 ) of the spindle ( 1 , 18 ), an endless circulation channel for the balls ( 4 ), characterized in that the nut ( 3 , 15 ) is a thin-walled bushing made by shaping without machining that comprises a bent-over bushing flange ( 6 ) wherein one of these rings is axially supported on the bushing flange ( 6 ) of the nut ( 3 ).