Abstract: A power transmission device that includes an uppermost side bearing; a lower side bearing; an uppermost side lubricating medium storage portion defined between the uppermost side bearing and the case to guide a lubricating medium to the uppermost side bearing; a lower side lubricating medium storage portion defined between the lower side bearing and the case to guide a lubricating medium to the lower side bearing, and located below the uppermost side lubricating medium storage portion when installing the power transmission device for a vehicle on the vehicle; and a communicating passage formed in the case to communicate the uppermost side lubricating medium storage portion and the lower side lubricating medium storage portion with each other.

Abstract: A vehicle power transmission device mounted on a vehicle for transmitting power from a power generating source to an axle through a gear train accommodated in a case, including: a lubricating pump that is accommodated in the case and which is driven by the power generating source and is capable of supplying a lubricating medium to an element to be lubricated; a lubricating medium storage portion that stores the lubricating medium; a lowermost gear that is located at a lowest position in the case, and which scoops up the lubricating medium in an inner bottom of the case toward a center of the case during normal rotation of the axle without guiding the lubricating medium along an inner wall surface of the case; a partition wall; and a lubrication flow path that guides the lubricating medium scooped up by the lowermost gear to a predetermined element to be lubricated.

Abstract: A vehicle power transmission device mounted on a vehicle for transmitting power from a power generating source to an axle through a gear train accommodated in a case, including: a lubricating pump that is driven by the power generating source and is capable of supplying a lubricating medium to an element to be lubricated; a lubricating medium storage portion that stores the lubricating medium; a lowermost gear that is located at a lowest position in the case; a topmost gear that is located at a highest position in the case; a lubrication flow path that guides the lubricating medium scooped up by the lowermost gear and carried by the gear train to a predetermined element to be lubricated; and a guide portion that guides the lubricating medium scooped up by the lowermost gear and carried by the gear train to an inlet of the lubrication flow path.

Abstract: A power transmission device that includes an uppermost side bearing; a lower side bearing; an uppermost side lubricating medium storage portion defined between the uppermost side bearing and the case to guide a lubricating medium to the uppermost side bearing; a lower side lubricating medium storage portion defined between the lower side bearing and the case to guide a lubricating medium to the lower side bearing, and located below the uppermost side lubricating medium storage portion when installing the power transmission device for a vehicle on the vehicle; and a communicating passage formed in the case to communicate the uppermost side lubricating medium storage portion and the lower side lubricating medium storage portion with each other.

Abstract: A vehicle power transmission device mounted on a vehicle for transmitting power from a power generating source to an axle through a gear train accommodated in a case, including: a lubricating pump that is accommodated in the case and which is driven by the power generating source and is capable of supplying a lubricating medium to an element to be lubricated; a lubricating medium storage portion that stores the lubricating medium; a lowermost gear that is located at a lowest position in the case, and which scoops up the lubricating medium in an inner bottom of the case toward a center of the case during normal rotation of the axle without guiding the lubricating medium along an inner wall surface of the case; a partition wall; and a lubrication flow path that guides the lubricating medium scooped up by the lowermost gear to a predetermined element to be lubricated.

Abstract: A vehicle power transmission device mounted on a vehicle for transmitting power from a power generating source to an axle through a gear train accommodated in a case, including: a lubricating pump that is driven by the power generating source and is capable of supplying a lubricating medium to an element to be lubricated; a lubricating medium storage portion that stores the lubricating medium; a lowermost gear that is located at a lowest position in the case; a topmost gear that is located at a highest position in the case; a lubrication flow path that guides the lubricating medium scooped up by the lowermost gear and carried by the gear train to a predetermined element to be lubricated; and a guide portion that guides the lubricating medium scooped up by the lowermost gear and carried by the gear train to an inlet of the lubrication flow path.