Reinforced fan frame structure

Abstract

A reinforced fan frame structure includes a frame body and at least one metal ring. The frame body has a seat portion with a centered bearing cup axially forward extended from the seat portion. The metal ring is integrally associated with the seat portion and has an inner circumferential edge facing toward the bearing cup. With the metal ring integrally associated with the seat portion of the frame body, it is able to effectively control the deformation and the flatness of the seat portion and accordingly, effectively upgrade the overall structural strength of the seat portion.

1 . A reinforced fan frame structure, comprising:
 a frame body having a seat portion with a centered bearing cup axially forward extended from the seat portion; and   at least one metal ring being integrally associated with the seat portion and having an inner circumferential edge facing toward the bearing cup.   
     
     
         2 . The reinforced fan frame structure as claimed in  claim 1 , wherein the inner circumferential edge of the metal ring defines a round opening therein, and an annular space is defined between the circumferential edge of the metal ring and the bearing cup. 
     
     
         3 . The reinforced fan frame structure as claimed in  claim 1 , wherein the seat portion is enclosed in an annular wall, so that an open-topped recess is defined on the seat portion within the annular wall. 
     
     
         4 . The reinforced fan frame structure as claimed in  claim 1 , wherein the frame body further has a bottom portion and a wall portion; the wall portion being extended along an outer periphery of the bottom portion to vertically rise from substantially three sides of the bottom portion, such that a receiving space is defined in the frame body by the wall portion and the bottom portion. 
     
     
         5 . The reinforced fan frame structure as claimed in  claim 4 , wherein an air outlet is defined on an open side of the bottom portion without the wall portion, and the air outlet being communicable with the receiving space in the frame body. 
     
     
         6 . The reinforced fan frame structure as claimed in  claim 4 , wherein the frame body further has a supporting base formed between the seat portion and the bottom portion; a plurality of connecting portions being formed between the supporting base and the seat portion, and the connecting portions respectively having an end fixedly connected to the supporting base and another end fixedly connected to the seat portion. 
     
     
         7 . The reinforced fan frame structure as claimed in  claim 6 , wherein a hole is defined between any two adjacent ones of the connecting portions; and the holes being extended through the supporting base and the bottom portion and being communicable with the receiving space in the frame body. 
     
     
         8 . The reinforced fan frame structure as claimed in  claim 1 , wherein the seat portion supports a stator thereon; the stator being externally fitted around the bearing cup and including a winding assembly and a silicon steel plate assembly, and the winding assembly being wound around the silicon steel plate assembly. 
     
     
         9 . The reinforced fan frame structure as claimed in  claim 8 , wherein the bearing cup has a rotor rotatably connected thereto, and the stator is enclosed in and covered by the rotor; and the rotor including a hub having a plurality of blades spaced on and extended from an outer circumferential surface of the hub, a magnetic member arranged inside the hub, and a rotary shaft having a front end fixedly connected to the hub and a rear end extended through a corresponding oil-impregnated bearing, such that the bearing and the rotary shaft are together received in the bearing cup. 
     
     
         10 . The reinforced fan frame structure as claimed in  claim 9 , wherein the magnetic member has a radially inward oriented magnetic surface and an axially downward oriented magnetic surface; the radially inward oriented magnetic surface facing toward the silicon steel plate assembly and the axially downward oriented magnetic surface facing toward the metal ring to provide an increased magnetic adhesion effect. 
     
     
         11 . The reinforced fan frame structure as claimed in  claim 3 , wherein the metal ring is integrally associated with the seat portion by insert-molding the metal ring in the recess of the seat portion.