Patent ID: 7701096

Claim:
A totally enclosed type main drive motor for a vehicle, comprising: a cylindrical outer casing frame attached to the vehicle so that a central axis of the outer casing frame extends horizontally and intersects with a vehicle's traveling direction at right angles; a stator core arranged on an inner circumference of the outer casing frame; a bracket having a bearing built-in, the bearing being arranged on one end of the outer casing frame; a housing having a bearing built-in, the bearing being arranged on the other end of the outer casing frame; a rotor shaft having its both ends supported by the bearing of the bracket and the bearing of the housing; a rotor core arranged in a substantially central part of the rotor shaft in a longitudinal direction thereof; openings formed in both axial ends of a peripheral wall of the outer casing frame, respectively; a pair of connective air ducts arranged outside the peripheral wall so as to communicate with the openings; a ventilation pipe connecting the connective air ducts with each other; a cooler containing the ventilation pipe and also releasing heat of air flowing in the ventilation pipe to outside air; a fan arranged on one end of the rotor shaft to allow air in the outer casing frame to flow into the cooler in circulation thereby cooling the air; and traveling-wind guiding means for collecting traveling wind flowing around the outer casing frame to the cooler, the traveling-wind guiding means comprising guide plates arranged above and below the cooler horizontally; wherein the upper guide plate has an end formed so as to project ahead of the cooler in the vehicle's traveling direction, and the end is bent at an angle within a range from 10° to 45° upwardly to the vehicle's traveling direction.