BALL SCREW DRIVE

摘要

A ball screw drive with a spindle nut (1) arranged on a screw spindle (2) and a continuous ball channel (7) formed by the screw spindle (2) and the spindle nut (1), in which channel balls arranged along a continuous ball track (8) circulate continuously, wherein the continuous ball channel (7) includes a load channel (9) wound in a spiral shape, with more than one winding, about a spindle axis (S) and a deflecting channel (10) which continuously connects the two ends of the load channel (9) to one another, wherein the spindle nut (1) has a nut part (4), on the inner circumference of which a ball groove (6) is formed being wound in a spiral shape about the spindle axis S, which ball groove, together with a ball groove (3) of the screw spindle (2) being wound in a spiral shape about the spindle axis S, forms the load channel (9), and wherein a deflecting element (5) including the deflecting channel (10) is arranged on the outer periphery of the nut part (4), and the deflecting ends (12) of the deflecting element (5) axially spaced apart from one another each penetrate a recess (11) through the thickness of the wall of the nut part (4), in order to deflect balls from the load channel (9) into the deflecting channel (10), and wherein the recess (11) has an unloading bore (15) connecting to the ball groove (6) of the nut part (4) and to the deflecting end (12) of the deflecting element (5) for unloading the balls, the axis of which unloading hole is arranged at a parallel distance to a plane (E1) containing the spindle axis (S).

主权项

1. A ball screw drive comprising a spindle nut arranged on a threaded spindle and an endless ball channel formed by the threaded spindle and the spindle nut, with balls arranged along an endless ball track circulating continuously in said ball channel,
the endless ball channel comprises a load channel that is wound about a spindle axis S in a helical shape over more than one winding and a deflection channel that continuously connects two ends of the load channel to each another, the spindle nut has a nut part, on an inner circumference of which, a ball groove is formed being wound in a helical shape about the spindle axis S, with said ball groove, together with a ball groove of the threaded spindle wound in a helical shape about the spindle axis S, forming the load channel, and a deflection element comprising the deflection channel is arranged on an outer periphery of the nut part, deflection ends of the deflection element spaced apart from one another in an axial direction each engage a recess that passes through a wall thickness of the nut part, in order to deflect the balls from the load channel into the deflection channel, the recess has an unloading hole connecting, on one side, to the ball groove of the nut part and, on the other side, to the deflection end of the deflection element for unloading the balls, and a hole axis of said unloading hole is arranged at a parallel distance to a plane (E1) containing the spindle axis (S).