| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve cooling effects in an outer ring of a bearing for supporting a planetary gear in a planetary gear device. <P>SOLUTION: In the planetary gear device, a cooling hole 29, for making a cooling oil pass through an outer ring 24 integrated with a body portion of a planetary gear 14, is provided in an axial direction, and a cooling oil nozzle 19 corresponding to the cooling hole 29 is installed outside the device. While the cooling oil injected from the cooling oil nozzle 19 passes through the cooling hole 29, the outer ring 24 of a roller bearing 21 supporting the planetary gear 14 is cooled. <P>COPYRIGHT: (C)2013,JPO&INPIT |
