| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable accurate suppression of leakage of oil to the outside through a space between a flange and an inner race, in a startup turning force transmission mechanism of an internal combustion engine having the tubular inner race connected by a coupling shaft to the flange provided at an end of an engine output shaft. <P>SOLUTION: The startup turning force transmission mechanism includes, in annular space formed by an inner peripheral surface 31 of an outer race 30 and an outer peripheral surface 21 of the inner race 20, sequentially from an engine body EB side, a one-way clutch 40, a ball bearing 50, and an inner side sealing member 60. On an outer peripheral surface 12a of the flange 12 of a crankshaft 10, a helical groove is formed along the outer peripheral surface 12a. On an inner peripheral surface 24a of the inner race 20 opposed to the outer peripheral surface 12a, a helical groove is formed along the inner peripheral surface 24a. The groove of the outer peripheral surface 12a and the groove of the inner peripheral surface 24a are mutually engaged to constitute an engaging part for suppressing passage of oil. <P>COPYRIGHT: (C)2012,JPO&INPIT |
