| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact power output device which is reduced in the number of parts and has a compact configuration, and in which the bearing life of an inboard-side bearing can be improved and the load capacity thereof can be increased. <P>SOLUTION: An outside member 19 is connected to an outboard-side end of a casing 1 fixed to a vehicle body side, and an inside member 21 for supporting a wheel is incorporated to the inside of the outside member 19 to serve as an output shaft of a deceleration device. Rolling elements 26a, 26b are incorporated between double rows of raceway grooves 20a, 20b formed on the inner periphery of the outside member 19 and raceway grooves 25a, 25b formed on the outer periphery of the inside member 21 to rotatably support the inside member 21. The pitch circle diameter of the inboard-side group of rolling elements 26a adjacent to the deceleration device, of the double row groups of rolling elements 26a, 26b, is larger than the pitch circle diameter of the outboard-side group of rolling elements 26b, and the number of rolling elements 26a of the inboard-side rolling element group with a large pitch circle diameter is larger than the number of rolling elements 26b of the outboard-side rolling element group with a small pitch circle diameter. <P>COPYRIGHT: (C)2013,JPO&INPIT |
