| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a planetary rotation/linear motion converter for enlarging a stroke of a sun shaft, and improving productivity and durability. Ž<P>SOLUTION: The planetary rotation/linear motion converter includes: the sun shaft 1 having a sun gear 11 and a helical ridge 12; planetary shafts 4 having planetary gears 41 meshing with the sun gear 11 of the sun shaft 1 and helical grooves 42 meshing with the helical ridge 12 of the sun shaft 1; and a nut 2 having an internal gear 21 meshing with the planetary gears 41 of the planetary shafts 4 and meshing with the helical grooves 42 in the planetary shafts 4. When the sun shaft 1 is rotated relative to the nut 2, the planetary shafts 4 linearly move relative to the sun shaft 1 in the axis direction of the sun shaft 1. Regions of the planetary shafts 4 in which the planetary gears 41 are formed and regions of the planetary shafts 4 in which the helical grooves 42 are formed are separated from each other in the axis direction of the planetary shafts 4. The sun gear 11 meshing with the planetary gears 41 of the planetary shafts 4 is formed on the helical ridge 12 of the sun shaft 1. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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