PLANETARY GEAR DEVICE

摘要

A planetary gear system (1) includes: a sun gear (5) having external teeth; a plurality of planet gears (7) having external teeth, each planet gear meshing with the sun gear; a ring gear (9) having internal teeth, the ring gear meshing with the planet gears; and a baffle unit (35) disposed between the planet gears which are adjacent to each other, the baffle unit having side faces (37F, 37R) positioned near the respective planet gears. The baffle unit (35) has: oil supply holes (47) which are formed in a tip portion (41) facing an outer periphery of the sun gear (5) and which jet out lubricating oil (OL) to mesh positions (43, 45) between the sun gear and the planet gears; and a collection opening (55) which is formed in at least one of the side faces and through which the lubricating oil (OL) that has been jetted out is collected into the baffle unit (35).