| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat radiation structure which achieves improvement of the motor operating efficiency and inhibits temperature rise in a motor.SOLUTION: A heat radiation structure for inhibiting temperature rise in a motor includes: a cylindrical housing 1; a rotor assembly; a cover 2; and a cooling fan 4. A first end of the housing 1 is molded on a sealing surface 101. A bearing 21 is disposed at a center part of the sealing surface 101. Through holes are formed on the sealing surface 101. An opening is formed at a rear end of the housing 1. At least one ventilation port 10 is formed on a peripheral wall surface of the housing 1 completely penetrating through the peripheral wall surface. The rotor assembly is rotatably attached to the interior of the housing 1. The cover 2 has the bearing 21 disposed at a center part and seals the opening of the housing 1. The cooling fan 4 is attached to a rotary shaft 16 of the rotor assembly to be positioned at the outer side of the cover 2.SELECTED DRAWING: Figure 3 |
