Motor with heat dissipation structure

In a motor including a housing, a cover, a rotating shaft, and a cooling fan, wherein the housing has a surrounding wall defining therein an inner space with a front opening and has a rear closure wall opposite to the front opening, the rear closure wall defining a central hole and a plurality of outlet holes;

• the cover, which closes the front opening of the housing, has a central hub defining a central hole and has a peripheral portion integrally formed around the central hub;
• the rotating shaft is mounted across the inner space of the housing, the rotating shaft having a first end which is inserted through the central hole of the rear closure wall and having a second end which is inserted through the central hole of the central hub of the cover;
• the cooling fan is fixed to the second end of the rotating shaft, so that the cooling fan is rotated together with the rotating shaft;
• wherein the improvement comprises:
• the peripheral portion of the cover is provided with a plurality of air guiding fins around the central hub and defines a plurality of first inlet holes corresponding to the air guiding fins, between the air guiding fins and the central hub, whereby a central portion of a whirling, ongoing air current generated by the cooling fan can be guided by the air guiding fins to flow through the first inlet holes of the cover to enter the inner space of the housing and finally flow out of the housing via the outlet holes for dissipating the heat generated in the housing;
• the surrounding wall of the housing defines a plurality of second inlet holes, and the cover is provided at an outer rim of its peripheral portion with a plurality of wind-catching projections each defining an air guiding channel, whereby an outer portion of the air current generated by the cooling fan can flow through the air guiding channels and the second inlet holes to enter the inner space of the housing for further dissipating the heat generated in the housing.