Ball screw
AssigneeINA-Schaeffler KG
InventorsAlexander Zernickel, Rolf Fleischhauer
Life of this patent
Estimating the term…
Abstract
In a ball screw drive comprising a spindle (1), a nut (3) surrounding the spindle (1), and balls (4) arranged between the spindle (1) and the nut (3), which balls (4) are in rolling contact with a screw track (2) formed on the spindle (1) and on corresponding screw tracks (7, 12) formed on rings arranged within the nut (3) comprises a deflecting region for returning the balls (4) from a run-out end of a common turn of the screw tracks (2, 7, 12) to a run-in end of this turn, the screw tracks (7, 12) of the rings arranged in the nut (3, 15) are made on front faces of these rings with the screw tracks (7, 12) of two adjacent rings defining together with the screw track (2) of the spindle (1, 18), an endless circulation channel for the balls (4).
Claims9
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).
Dependencies are inferred from the claim text.