Patent ID: 8261883

Claim:
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, comprising: 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; an input shaft that receives power from the power generating source; a lowermost gear that is located at a lowest position in the case among gears included in the gear train when the power transmission device is mounted on the vehicle, 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 topmost gear that is located at a highest position in the case among the gears included in the gear train when the power transmission device is mounted on the vehicle, and which rotates in a same direction as the lowermost gear during normal rotation of the axle; a partition wall that extends upward from the inner bottom of the case and surrounds a part of an outer periphery of the lowermost gear on a center side of the case, wherein a downstream end of the partition wall where the lubricating medium is scooped up is between the lowermost gear and the input shaft; 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 surrounds a part of an outer periphery of the topmost gear and guides the lubricating medium scooped up by the lowermost gear and carried by the gear train to an inlet of the lubrication flow path.