| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology for efficiently cooling an in-wheel motor drive device with a simple constitution. <P>SOLUTION: A plurality of peripheral fins 22g are formed on an outer peripheral surface of a motor casing 22a, and a plurality of fins 22f are formed on an outside surface of a motor rear cover 22d. Lubricating oil flows by cycling through a motor casing oil path 55 arranged in the motor casing 22a, a motor rear cover oil path 56 arranged in the motor rear cover 22d and a deceleration part B. Such the lubricating oil is cooled when flowing in the motor casing oil path 55 and the motor rear cover oil path 56. Thus, the in-wheel motor drive device 21 is efficiently cooled. <P>COPYRIGHT: (C)2012,JPO&INPIT |
