PLANET GEAR SUPPORT SHAFT, METHOD FOR MANUFACTURING PLANET GEAR SUPPORT SHAFT, AND PLANETARY GEAR UNIT

Provided are a planet gear support shaft, a method for manufacturing the planet gear support shaft, and a planetary gear unit. The planet gear support shaft (5; 5A; 5B; 5C; 5D) includes a cylindricalbody that is open at both ends in a central axis direction. The cylindrical body has an inlet port (501) through which lubricating oil is introduced into a hollow portion (50) of the cylindrical body,and a discharge port through which the lubricating oil introduced into the hollow portion is discharged, the inlet port (501) and the discharge port being open to an inner peripheral surface (50a) ofthe hollow portion (50) at different positions in the central axis direction. An oil guide groove (51, 52) is provided between a first opening (501a) of the inlet port and a second opening (502a) ofthe discharge port in the inner peripheral surface. The oil guide groove (51, 52) is configured to guide the lubricating oil between the first opening and the second opening. 本发明提供行星齿轮支撑轴及其制造方法和行星齿轮单元。行星齿轮支撑轴(5；5A；5B；5C；5D)包括在中心