| 摘要 |
A pinion shaft (12) is supported in a housing (11) by two tapered roller bearings (13,14) which are arranged separately from each other in an axial direction, and these two tapered roller bearings (13,14) are lubricated with lubricating oil in the housing in oil bath lubrication method. A labyrinth forming member (40) in a disc-like shape is disposed with respect to a backward tapered roller bearing (13) out of the two tapered roller bearings (13,14), on an end face at a small diameter side of an inner ring (22) thereof in a press-contact manner, so as to be opposed to a rib part (24b) which is formed inwardly in a radial direction at a small diameter end of a cage (24). In this manner, a labyrinth structure for restricting a flow of the lubricating oil is formed between the rib part (24b) at the small diameter end side of the cage (24) and the labyrinth forming member (40). |
