| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw device that can easily attach and detach a dustproof member without reference to the thickness of a nut, and also can mount the dustproof member on the nut even after a screw shaft provided with a screw groove cut and raised part is incorporated in the nut.SOLUTION: A ball screw device includes: a screw shaft 10; and a nut 20 which threadably engages the screw shaft 10 through a ball 30 relatively movably, and an engagement groove 22 is formed on an inner peripheral surface 20a of the nut 20 in a peripheral direction at a predetermined distance from an axial end part. The nut 20 is fitted with a cylindrical dustproof member 40 which seals the gap between the screw shaft 10 and nut 20 by engaging an engagement piece 41 formed on an outer peripheral surface 40a with the engagement groove 22. The dustproof member 40 comprises: divided bodies 40A, 40B, which are coupled together each at one end and detachable each at the other end. |
