| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw which can lighten stress generated in a circulation top so as to reduce the damage and to improve the durability. SOLUTION: A rolling member circulation path 7 is formed with a space defined between opposite two block portions 8a, 8b in the circulation top 4 and a tongue section 11 arranged in the middle of the space between the block portions 8a, 8b extending from one opening portion 10a, in the vicinity of a rolling member returning passage 6 formed in a ball nut 2 to the other opening portion 10b. The rolling member circulation path 7 is so formed that an interval between the block portions 8a, 8b from the other opening portion 10b to the tongue section 11 gradually becomes larger from the tongue section 11 toward the other opening portion 10b. COPYRIGHT: (C)2004,JPO
|
