VEHICLE DRIVE UNIT FOR DUMP TRUCK

摘要

A wheel drive motor (18) is disposed at the inner peripheral side of a spindle (15) for a wheel (12), and rotation of a shaft (19) connected to a rotational shaft (18B) of the wheel drive motor is decelerated by a reduction gear (20). An axial intermediate portion (19A) of the shaft (19) is supported by a shaft bearing (44) provided between a sleeve (41) and a retainer (42). On the other hand, a spindle side oil supplying passage (48) is provided in the top portion of the spindle (15) and a retainer side oil supplying passage (49) is provided in the retainer (42). At rotation of the wheel (12), lubricant oil (G) scattered on the upper surface of the spindle (15) is supplied to the shaft bearing (44) through the spindle side oil supplying passage (48) and the retainer side oil supplying passage (49).