| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a planetary differential screw type rotation-linear motion converting mechanism capable of preventing screw tips of planetary shafts from strongly contacting a screw bottom or vicinity of the screw bottom on a nut or sunshaft side independently from connection between planetary shafts with a carrier. <P>SOLUTION: A tip shape of a screw part 8c provided to a planetary shaft 8 is formed into such a shape that a tip is eliminated at a same diameter position on a tip side from screw effective diameter positions S1, S2 except for the screw effective positions S1, S2. This can prevent screw tips of planetary shafts 8 from strongly contacting a screw bottom or vicinity of the screw bottom on a nut 4 or sunshaft 6 side independently from connection between planetary shafts 8 through a carrier. As a result, sliding in other than the screw effective diameters is restrained, and deterioration of rotation-linear motion converting efficiency is prevented. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
