Schaeffler Technologies Ag & Co .kg

Gerd Sanewski

Mario Kreutzer

Nadine Kliemann

A ball screw drive comprising a leadscrew that has at least one outer ball groove and comprising a threaded nut that has at least one inner ball groove, which ball grooves together to form a ball channel in which balls, via which the leadscrew is guided relative to the threaded nut, are accommodated, wherein in the ball groove of the threaded nut is provided at least one radially closed pocket in which a deflection element for deflecting the balls moving in the ball groove is accommodated, wherein the threaded nut has an outer deflection device, which outer deflection device is axially in front of the deflection element in the form of an individual deflection element, is situated on the outer side of the threaded nut and engages in two radial openings in the threaded nut, and by means of which outer deflection device the balls are axially offset.

Ball screw drive

A ball screw drive, comprising a screw that includes at least one outer ball groove, and a threaded nut that includes at least one inner ball groove, wherein the inner and outer ball grooves combine to form a ball channel in which one or more balls are accommodated, wherein at least one pocket is formed in the threaded nut, in which a deflection element is accommodated for deflecting the balls rolling in the ball groove, wherein the deflection element includes a deflection body, on which an intake and discharge section are formed and open into the ball groove to enable the one or more balls to enter and exit the groove, and wherein the intake and discharge section includes a snaking bath that enables the ball to be moved from one ball groove section into an adjacent ball path section.

A spindle nut for a ball screw with a nut part on whose inner periphery there is a spiral ball groove that winds around a spindle axis for the rolling of balls and with two deflection elements, the balls are deflectable into the curved deflection channel of each deflection element and the nut part has two recesses that are spaced apart from each other in the axial direction and one of the deflection elements is arranged in each recess. The nut part is provided with a straight return channel for the balls, and the straight return channel is connected to the two deflection channels. The balls are movable along a ball track in the curved deflection channel and in the straight return channel, and the straight return channel is arranged within a wall thickness of the spindle nut and is arranged at an angle relative to the spindle axis.

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Erlangen, Germany

Gerd Sanewski