| 摘要 |
PURPOSE: A cooling structure is provided to protect a bearing from overheat by permitting the air to flow toward the bearing by the nozzles coupled along the circumference of a front end bracket. CONSTITUTION: A cooling structure comprises a housing(120) which accommodates a stator core and a rotor core; a front end bracket(122) and a rear end bracket(124) coupled to both ends of the housing, and which has centers on which bearings(132,134) are mounted; a rotating shaft(130) supported by the bearings and coupled to the rotor core; a cooling fan(140) coupled to the rotating shaft protruded from the rear end bracket; and a plurality of nozzles(150) coupled to the front end bracket. Each of the nozzles includes a hollow body; an inlet port formed at an end of the hollow body in such a manner that the inlet port is communicated to the air path formed between adjacent cooling pieces(126); and an outlet port formed at the other end of the hollow body toward the bearing.
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