| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To smoothly guide linear movement of an output member even if lateral moment acts on the output member being driven linearly, and to prevent contact of a shoulder of a spiral projected thread with a groove edge when the spiral projected thread is fit into a circumferential groove or a spiral groove. <P>SOLUTION: An outer annular member 5, which regulates the axial movement of a carrier 6 supporting a planetary roller 7 and is fitted inside of the inner diameter surface of a cylindrical member of a housing in such a way as to be slidable in the axial direction, is stopped from rotating by a key in a coupled object which is being driven, and the outer annular member 5 serves as the output member which moves linearly. Further, a side wall of the spiral groove 7a of an outer diameter surface of the planetary roller 7 is inclined such that a groove width is expanded from a groove bottom side to a groove edge side. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
