STRUCTURE FOR PLACING BEARING IN LUBRICATION OIL PATH

摘要

[PROBLEMS] A structure for placing a bearing in a lubrication oil path, in which, even if a lubrication oil supply function that utilizes centrifugal force does not work, lubrication oil is supplied normally. [MEANS FOR SOLVING PROBLEMS] Lubrication oil supply paths (211, 212, 143) for supplying lubrication oil to needles (180) between a pinion gear (11P) and a pinion shaft (210) are formed from the pinion shaft (210) to a first front carrier (140) on which the pinion shaft (210) is installed. The lubrication oil supply paths are connected to a lubrication oil path (191) formed between a first front sun gear (11S) and an expanded diameter section (91) of a stator shaft (90) placed axially adjacent the first front sun gear (11S). A needle bearing (200) in contact with the expanded diameter section (91) of the stator shaft (90) and with an end surface of the sun gear (11S) is placed in the lubrication oil path (191). Rotation of the needle bearing (200) causes the lubrication oil in the lubrication oil path to be supplied to the needles (180) after allowing the lubrication oil to pass through the lubrication oil supply paths connected to the lubrication oil path.