| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a propeller shaft in which μ-v characteristics is set to a positive gradient without performing a coating process with the use of, for example, DLC (diamond like carbon). <P>SOLUTION: The propeller shaft includes: a first shaft 2 that has a plurality of first fine grooves 5 extending in a first direction (face width direction) on a torque transmission face 200a; and a second shaft 3 that is coupled to the first shaft 2 so as to be movable relative to the first shaft in an axial direction of the first shaft, and that has a plurality of second fine grooves 6 extending in a second direction that crosses the first direction on a torque transmission face 300a. <P>COPYRIGHT: (C)2012,JPO&INPIT |
