Worm-gear type ceiling fan motor

Abstract

A worm-gear type ceiling fan motor comprises a stator, a rotor, two bearings, two heat-expelling covers, the stator and the two bearings are fixed on a motor shaft, the rotor is fixed on the bearings by cooperating with the heat-expelling covers. A plurality of hollow slots are formed on surface of the heat-expelling covers, in which are provided with plural worm-gear blades, when the rotor rotates, fresh air is instantly introduced into the ceiling fan motor via the upper heat-expelling cover expelled out from the lower heat-expelling cover, thus, air is circulated through the inside of the worm-gear type ceiling fan motor to cool down the working temperature and prolong the service life of the ceiling fan motor accordingly.

1 . A worm-gear type ceiling fan motor comprising a stator, a rotor, two bearings, an upper heat-expelling cover and a lower heat-expelling cover, the stator and the two bearings fixed on a motor shaft, the rotor fixed on the bearings by cooperating with the upper and the lower heat-expelling covers; 
 wherein a plurality of hollow slots are formed on surface of the upper and the lower heat-expelling covers, in which are provided with plural worm-gear blades, when the rotor rotates relative to the stator, the worm-gear blades on the surface of the upper heat-expelling cover will instantly introduce fresh air into inner space of the worm-gear type ceiling fan motor through the hollow slots, and expelling it out from the hollow slots of the lower heat-expelling cover, through this way, air is circulated through the inner space of the worm-gear type ceiling fan motor.    
   
   
       2 . The worm-gear type ceiling fan motor as claimed in  claim 1 , wherein a plurality of positioning posts are formed at two opposite sides of the rotor, and the upper and the lower heat-expelling covers are fixed to the respective positioning posts through fasteners.