US20060039809A1

US20060039809A1 - Worm-gear type ceiling fan motor

Info

Publication number: US20060039809A1
Application number: US10/923,100
Authority: US
Inventors: Robin Fan
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-19
Filing date: 2004-08-19
Publication date: 2006-02-23

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.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
This invention relates to a worm-gear type ceiling fan motor with worm-gear air-cooling system which is capable of cooling the working temperature of the ceiling fan motor, improving air-circulating efficiency and prolonging its service life.
2. Description of the Prior Arts
A traditional ceiling fan comprises a driving motor, a fly-wheel connected to the driving motor, and a plurality of fan blades fixed on the fly-wheel. The driving motor is an external revolving motor, it has to produce air circulation by rotating the fly-wheel, the motor cover and the fan blades together. However, there are still some problems as follows need to solve:
First, power is wasted since the driving motor has to drive the fly-wheel, the motor cover and the fan blades to rotate together, so that the working temperature of driving motor will be high and the service life will be affected.
Second, the driving motor, the fly-wheel and the motor cover is located at the center of the traditional ceiling fan, only the fan blades can rotate to produce air movement and there still exists a turbulence in the central space corresponding to the driving motor, the fly-wheel and the motor cover. Accordingly, the air circulating speed right below the ceiling fan motor is very slow.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a worm-gear type ceiling fan motor with worm-gear air-cooling system which is capable of cooling down the working temperature of the ceiling fan motor, improving efficiency of air movement and prolonging service life. When the worm-gear type ceiling fan motor rotates, forward for example, a plurality of 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 a plurality of hollow slots, and expelling it out from the hollow slots of a lower heat-expelling cover, through this way, air is circulated through the inside of the worm-gear type ceiling fan motor, so as to cool down the working temperature of the motor effectively, and to prolong its service life tremendously.
The second object of the present invention is to provide a worm-gear type ceiling fan motor capable of assisting in producing air circulation bellow the central part of the ceiling fan motor.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a worm-gear type ceiling fan motor in accordance with the present invention;
FIG. 2 is an assembly view of the worm-gear type ceiling fan motor in accordance with the present invention;
FIG. 3 is an assembly cross sectional view of worm-gear type ceiling fan motor in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1-3, a worm-gear type ceiling fan motor in accordance with a preferred embodiment of the present invention is shown and generally including: a motor shaft 10, a stator 20, a rotor 30, two bearings 40 and two heat-expelling covers 50.
The motor shaft 10 is a hollow tube for allowing the passage of a power source, and a top end of the motor shaft 10 is hung on the ceiling.
The stator 20 is fixed to the motor shaft 10 and produces magnetic rotating force after the power is on.
The rotor 30 is moveably mounted outside the stator 20 and interiorly provided with an induction wall 31 employed to rotate the rotor 30 under the influence of the stator 20. At two opposite sides of the rotor 30 are formed with two pairs of positioning posts 32, respectively.
The bearings 40 are fixed at two opposite positions on the motor shaft 10.
The heat-expelling covers 50, including an upper cover and a lower cover, are fixed on the bearings 40 through a central hole 51, covered face to face and fastened to the positioning posts 32 on both sides of the rotor 30 through fasteners 54. On the surface of the heat-expelling covers 50 is formed with a plurality of through slots 52 in which are provided plural worm-gear blades 53 whose angles are specially designed in accordance with each heat expelling cover.
When the worm-gear type ceiling fan motor 50 rotates, the worm-gear blades 53 on the upper heat-expelling cover 50 will instantly introduce the fresh air A above the motor into the space between the stator 30 and the rotor 20 through the hollow slots 52, and expelling it out from the lower heat-expelling cover 50. Through this way, air A is circulated through the inside of the worm-gear type ceiling fan motor, so as to cool down the working temperature of the motor effectively, and to prolong its service life tremendously. Furthermore, since the worm-gear blades 53 of the heat-expelling covers 50 can produce strong air circulation, so that the problem of weak air circulation bellow the conventional ceiling fan motor can be solved.
While we have shown and described various embodiments in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims

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.