| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw device enabling a dustproof countermeasure and a grease holding countermeasure for enhancing sealability, inexpensively manufacturable, and capable of improving installation performance, even if employing such a configuration that a seal body is constituted of one sheet, in a contact seal part arranged in an end part of a nut.SOLUTION: In a ball screw device, a contact seal part 9 arranged in an end part of a nut 2 includes: a seal body 10 of an annular ring plate shape formed so that a contour shape on its inner peripheral side slidingly contacts in a cross section perpendicular to the axis of a screw shaft 1 over the whole periphery with a ball rolling groove 4 of the screw shaft 1 opposed to the shape; and an annular ring plate-like face plate 12 installed so as to support the reverse surface side of this seal body 10 from the inside in the axial direction of the nut 2, having a similar figure of offsetting the contour shape on the inner peripheral side of the seal body in the expanding direction to the cross section perpendicular to the axis of the screw shaft 1, in the contour shape on the inner peripheral side, and made of a harder raw material than the seal body 10. |
