| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize and reduce the manufacturing cost by the simplification of a ball screw nut structure. SOLUTION: This ball screw has a mechanism for transmitting a power to the meshing cross point of the spiral groove of a screw shaft 1 with the circumferential groove of a nut 2 through a rolling body 3 and for changing the direction of the power.
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