| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball circulation part embedded type ball screw device which has a simple structure, reduce time and labor required for assembly, and provides high productivity. SOLUTION: When a ball circulation part 4 is fitted in a cylindrical ball nut 2, at least one part of an outer end face in which the ball circulation part 4 is fitted is arranged in such a manner that it is substantially on the same face as an outer peripheral face of the ball nut 2, and a substantially cylindrical circulation part retaining member 7 provided with an inside diameter which is fitted in the outer peripheral face of the ball nut 2 without producing a clearance is fitted therein to fix the ball circulation part 4 on the ball nut 2. |
