| 摘要 |
PROBLEM TO BE SOLVED: To provide a cage for a non-circulation type ball screw which improves the processing accuracy and the positional accuracy of individual ball attachment parts even if the number of windings is increased, and can improve productivity, and its manufacturing method.SOLUTION: This cage 20 is constituted of a group of two cylindrical divided components 21, 22 which are divided along an axial direction. The two divided components 21, 22 have spiral protrusions 23 which are spirally formed along a screw shaft 1 or a screw groove of a nut 2, the spiral protrusions 23 are formed while protruding toward the outside rather than a cylindrical external peripheral face of the cage 20, and a plurality of ball-holding ball attachment parts 24 are protrusively arranged from internal peripheral face sides of the divided components 21, 22 along the spiral protrusions 23.SELECTED DRAWING: Figure 2 |
