Fan device having a self-lubricating bearing

Abstract

The present invention provides a fan device having a self-lubricating bearing. The fan device includes a fan base and at least one self-lubricating bearing. The self-lubricating bearing is disposed in a bearing hole of the fan base and has a bearing surface assembly. The bearing surface assembly is provided with at least one magnetic element. By this arrangement, the magnetic element generates a magnetic attractive force to the spindle, thereby making the spindle to return to its optimal position rapidly. In this way, wear, noise and vibration are reduced. Further, the lifetime of the fan device is extended.

What is claimed is: 
     
         1 . A fan device having a self-lubricating bearing, including:
 a fan base having a sleeve on its one side, the sleeve having a bearing hole;   at least one self-lubricating bearing disposed in the bearing hole, the self-lubricating bearing having a spindle hole and a bearing surface assembly, the bearing surface assembly being provided with at least one magnetic element; and   a fan wheel having a plurality of blades and a spindle, the spindle being pivotally disposed in the spindle hole.   
     
     
         2 . The fan device having a self-lubricating bearing according to  claim 1 , wherein a hydraulic layer is formed between spindle and the spindle hole. 
     
     
         3 . The fan device having a self-lubricating bearing according to  claim 1 , wherein the bearing surface assembly includes an upper bearing surface and a lower bearing surface. 
     
     
         4 . The fan device having a self-lubricating bearing according to  claim 3 , wherein the magnetic element is provided on the upper bearing surface. 
     
     
         5 . The fan device having a self-lubricating bearing according to  claim 3 , wherein the magnetic element is provided on the lower bearing surface. 
     
     
         6 . The fan device having a self-lubricating bearing according to  claim 3 , wherein the magnetic element is provided on the upper bearing surface and the lower bearing surface. 
     
     
         7 . The fan device having a self-lubricating bearing according to  claim 1 , wherein bearing surface assembly further includes a middle bearing surface, the middle bearing surface is formed on a trough of an outer surface of the self-lubricating bearing, the magnetic element is provided on the middle bearing surface. 
     
     
         8 . The fan device having a self-lubricating bearing according to  claim 1 , wherein the magnetic element is selected from any one of a group including a magnet, magnetic powder and an element having magnetism.