| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a circulation unit for a ball screw capable of realizing a processing cost reduction of the ball screw and simplification of its installation and improving a positional accuracy of the ball screw and its smooth operation.SOLUTION: A circulation unit 60 comprises a first surface 61, and a second surface 62 opposite to the first surface 61. The second surface 62 is concave in arc shape toward the first surface 61 in order to accommodate for a surface of a screw shaft. The first surface 61 is divided into a first slant surface 611 and a second slant surface 612 of which orientations are opposite to each other. The first slant surface 611 and the second slant surface 612 extend in parallel with a tangential direction of the second surface 62, i.e. a tangential direction of a screw shaft. The first slant surface 611 has a first side 613 and a second side 614. The second slant surface 612 has a third side 615 and a fourth side 616.</p> |
