| 摘要 |
<p>The present invention achieves a configuration of a cycloid decelerator and an in-wheel motor drive device using the same wherein a retainer of a needle roller bearing that supports an external pin is prevented from coming out, without increasing cost or housing size. In the cycloid decelerator, an engagement flange section (53) that curves radially inward is provided on the outer edge of a retainer (48) of a needle roller bearing (43) that supports an external pin (31), and this engagement flange section (53) is engaged in the axial direction with the outer end face of the external pin (31) so as to prevent the retainer (48) from coming out.</p> |
