Reverse channel for ball screw, has reverse bend that is formed in cross-section such that bend has large section surface so that distance piece does not contact with inner guiding surface when piece guides through bend

摘要

The channel has a reverse bend (51) and two guiding sections (52, 53) that connect two ends of the bend, a coil groove (21) and a reverse borehole (22). The bend has inner and outer guiding surfaces, where an inner curved line is in contact with the inner surface. A center point of a curved line is provided in a position such that inner and outer lines are not parallel to each other. The bend is formed in a cross-section such that the bend has a large section surface so that a distance piece (4) does not contact with the inner guiding surface when the piece guides through the bend.