| 摘要 |
PROBLEM TO BE SOLVED: To overcome a problem in a bearing lubricating device for a planetary gear wherein lubricating oil is insufficient in a bearing part close to the revolution center because a bearing inner ring and a support shaft only revolve without rotation.SOLUTION: The bearing lubricating device for the planetary gear includes a rolling bearing 13 interposed between a planetary gear 11 and its support shaft 12, and an oil feeding reservoir 23 provided inside the support shaft 12. The inner peripheral surface of the oil feeding reservoir 23 is provided with oil feeding holes 24b-24d communicating with a raceway 25 of the rolling bearing 13, and the oil feeding reservoir is provided with a lubricating oil filling port 32 opened in an axial direction. Based on a position on a reference line Y that connects the revolution center P of the planetary gear 11 to the bearing center O, the filling port 32 is provided in a position close to the revolution center P rather than the bearing center O when viewed from the revolution center P, and the oil feeding holes 24b-24d are provided in positions far from the filling port 32. |
