| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw device in which even if the number of sheets of a seal body is comprised of a single sheet, dust prevention measures and grease holding measures to enhance sealability are enabled, and which can be manufactured at low cost and can be enhanced in assemblability.SOLUTION: A ball screw device includes: a seal body 10 in an annular disk shape formed so that a contact seal part 9, arranged in an end of a nut 2, is in sliding contact with an axis orthogonal cross section of a screw shaft 1 along the whole circumference of a ball rolling groove 4 of the screw shaft 1 in which a contour shape in its inner circumference faces this; and an annular disk-like face plate 12 placed such that the reverse side of the seal body 10 is supported from the inner side of the axis direction of the nut 2, having, as a contour shape of the inner circumference, a similar form offsetting the contour shape of the inner circumference the seal body in a direction expanding to the orthogonal cross section of the screw shaft 1, and made of a material harder than the seal body 10. |
