Abstract: According to one embodiment, an oil guide member is provided in a case of, for example, a transmission. The case is provided with a first oil channel through which lubricant flows when a shaft is rotated in a first rotation direction, and a second oil channel through which the lubricant flows when the shaft is rotated in a second rotation direction. The oil guide member includes a base portion forming an oil chamber capable of storing the lubricant between the base portion and an internal surface of the case, and an extending portion extending from the base portion toward inside of an internal oil channel of the shaft, and provided with a communicating channel communicating with the oil chamber and the internal oil channel. The base portion is provided with an inlet allowing an inflow of the lubricant from the first oil channel and the lubricant from the second oil channel.

Abstract: A vehicle differential device having a differential case rotatably supported via a bearing by a housing and a drive shaft inserted into the differential case, including an oil sump member on the opposite side of the differential case to the bearing, the oil sump member including an insert hole into which the drive shaft is inserted, and an oil supply channel formed higher than the drive shaft in the vertical direction, wherein at least a portion of the insert hole is formed with a gap between the insertion hole and the drive shaft wider than that on the vertically lower side of the rotational axis of the drive shaft, the oil sump member includes a discharge hole allowing oil to flow out toward the differential case if an oil level of an oil chamber formed between the oil sump member and an oil seal exceeds a predetermined height.

Abstract: A vehicle differential device having a differential case rotatably supported via a bearing by a housing and a drive shaft inserted into the differential case, including an oil sump member on the opposite side of the differential case to the bearing, the oil sump member including an insert hole into which the drive shaft is inserted, and an oil supply channel formed higher than the drive shaft in the vertical direction, wherein at least a portion of the insert hole is formed with a gap between the insertion hole and the drive shaft wider than that on the vertically lower side of the rotational axis of the drive shaft, the oil sump member includes a discharge hole allowing oil to flow out toward the differential case if an oil level of an oil chamber formed between the oil sump member and an oil seal exceeds a predetermined height.