MOTOR WITH HEAT DISSIPATION STRUCTURE

摘要

A motor generally includes a housing, a cover, and a cooling fan. The cover defines multiple first inlet holes and is provided with an air collecting ring around the first inlet holes for collecting some of the air current generated by the cooling fan. Furthermore, the cover is provided with multiple wind-catching projections. The housing defines multiple second inlet holes near its opening. The cover is installed to the housing such that the wind-catching projections are respectively located above the second inlet holes of the housing, so as to collect some of the air current. Furthermore, multiple recesses are defined between the wind-catching projections, so that some of the air current may flow along the outer surface of the housing via the recesses to further cool down the housing.

主权项

1. 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 an air collecting ring around the central hub and defines a plurality of first inlet holes between the air collecting ring and the central hub, whereby a central portion of a whirling, ongoing air current generated by the cooling fan can flow through the space between the air collecting ring and the central hub of the cover and then 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.