| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure can prevent elastic bend deformation of a shaft preload part 20a of elastic material to a spline shaft part 12a provided on a chip part of an output shaft 10 of an electric motor when a spline hole 11b provided at a base end of a worm 8 is inclined. <P>SOLUTION: For a depth end face 24a of the spline hole 11b and a chip face 25 of the shaft preload part 20a, which are in contact with each other, the depth end face 24a is formed as a partially spherical recessed surface, and the chip face 25 is formed as a partially spherical projected surface having the same radius of curvature as the depth end face 24a. In this constitution, a contact position of the chip face 25 to the depth end face 24a moves, so that the problem is solved. <P>COPYRIGHT: (C)2010,JPO&INPIT |
