Kugelspindelvorrichtung

摘要

In a ball screw apparatus providing a screw shaft, a ball screw nut and a plurality of balls, a seal member is formed of a ring which is fitted into a large-diameter portion of the ball screw nut and a ridge which engages the screw groove of the screw shaft with an inner circumference of the seal member. The ring is formed of first and second segments, each of the first and second segments including a connecting projection and a connecting recess at ends, respectively, the connecting projection and the connecting recess of the first segment being capable of engaging the connecting recess and the connecting projection of the second segment, respectively. The seal member has an anti-slip device for mounting the seal member in the ball screw nut in a short time regardless of the length of the screw shaft and the shape of its end portions and, what is more, cutting and other special operations are unnecessary and there is a great latitude in the selection of materials for the seal member, which therefore can be manufactured at low cost.