Ceiling fan motor

Abstract

A ceiling fan motor with a reduced height includes a stator, a rotor and a circuit unit. The stator includes an iron core and a shaft. The iron core has an assembly hole. The shaft is non-rotatable and extends through the assembly hole in an extending direction. The rotor is rotatably coupled with an outer periphery of the shaft and has a housing. The rotor rotates about the shaft. The circuit unit is arranged between the iron core and the housing of the rotor in a radial direction of the shaft perpendicular to the extending direction of the shaft. The housing delimits a compartment where the stator and the circuit unit are received.

What is claimed is: 
     
         1 . A ceiling fan motor comprising:
 a stator comprising an iron core and a shaft, wherein the iron core has an assembly hole, wherein the shaft is non-rotatable, and wherein the shaft extends through the assembly hole in an extending direction;   a rotor rotatably coupled with an outer periphery of the shaft and having a housing, wherein the rotor rotates about the shaft; and   a circuit unit arranged between the iron core and the housing in a radial direction perpendicular to the extending direction of the shaft, wherein the housing delimits a compartment, and wherein the stator and the circuit unit are received in the compartment.   
     
     
         2 . The ceiling fan motor as claimed in  claim 1 , wherein the circuit unit comprises a circuit board mounted with at least one electronic component, wherein the rotor and the iron core are located within an area in the extending direction of the shaft, and wherein the at least one electronic component of the circuit board extends into the area. 
     
     
         3 . The ceiling fan motor as claimed in  claim 1 , wherein the iron core is coupled to a radial extension portion, wherein the circuit unit is coupled with the radial extension portion, wherein the radial extension portion extends from the iron core towards the housing, and wherein the circuit unit is aligned with the rotor or the iron core in a radial direction perpendicular to the extending direction of the shaft. 
     
     
         4 . The ceiling fan motor as claimed in  claim 1 , further comprising a cover coupled with the stator, wherein the cover has a flat outer surface in a radial direction perpendicular to the extending direction of the shaft. 
     
     
         5 . The ceiling fan motor as claimed in  claim 4 , wherein the circuit unit comprises a circuit board mounted with at least one electronic component, wherein the circuit board is coupled with the cover, and wherein the at least one electronic component of the circuit board extends between the iron core and the housing. 
     
     
         6 . The ceiling fan motor as claimed in  claim 4 , wherein the cover has an assembly channel extending through the cover from an inner edge of the cover to an outer edge of the cover in the radial direction of the shaft, and wherein the cover is detachably attached to the stator. 
     
     
         7 . The ceiling fan motor as claimed in  claim 1 , further comprising a bearing coupled with the outer periphery of the shaft, wherein the rotor further includes a permanent magnet unit, wherein the housing includes an axially extending wall, wherein the permanent magnet unit is located intermediate the bearing and the stator, wherein the stator is located intermediate the axially extending wall and the permanent magnet unit, and wherein the circuit unit is located intermediate the axially extending wall and the stator. 
     
     
         8 . The ceiling fan motor as claimed in  claim 7 , wherein an entirety of the circuit unit is located between the iron core and the axially extending wall in the radial direction of the shaft.