Adjustable device for balancing a fan

Abstract

An adjustable device for balancing a fan includes a hollow hub, which defines a receiving space and a plurality of fan blades extending outward from the hollow hub. Wherein, the receiving space includes an inner ring at the inner wall surface thereof and at least a balancing granular part is connected to the inner ring via a weak spot such that the weak spot is capable of being broken for separating the balancing granular part from the ring. Once the balancing granular part is removed to reduce weight at the position without the balancing granular part, the fan is able to run steadily instead of in a state of unbalancing.

1 . An adjustable device for balancing a fan, comprising: 
 a hollow hub, defining a receiving space; and    a plurality of fan blades, extending outward from the hollow hub;    wherein, the receiving space includes an inner ring at the inner wall surface thereof and at least a balancing granular part is connected to the inner ring via a weak spot such that the weak spot is capable of being broken for separating the balancing granular part from the ring;    whereby, once the balancing granular part is removed to reduce weight at the position without the balancing granular part, the fan is able to run steadily instead of in a state of unbalancing.    
   
   
       2 . The adjustable device for balancing a fan as defined in  claim 1 , wherein the inner ring detachably fits with the hub.  
   
   
       3 . The adjustable device for balancing a fan as defined in  claim 1 , wherein a spindle is arranged at the center of the hub.  
   
   
       4 . The adjustable device for balancing a fan as defined in  claim 1 , wherein the inner ring is joined to a spindle.  
   
   
       5 . The adjustable device for balancing a fan as defined in  claim 1 , wherein the weak spot is a continuation zone of a joint between the balancing granular part and the inner ring.  
   
   
       6 . The adjustable device for balancing a fan as defined in  claim 1 , wherein the weak spot is connected to part of the inner ring and the balancing granular p art.  
   
   
       7 . The adjustable device for balancing a fan as defined in  claim 1 , wherein the balancing granular part is the weak spot.  
   
   
       8 . The fan capable of resisting reversed flow as defined in  claim 1 , wherein a plurality of connecting parts corresponding to the baffle parts.  
   
   
       9 . The fan capable of resisting reversed flow as defined in  claim 8 , wherein each of the connecting parts has a through hole.  
   
   
       10 . The fan capable of resisting reversed flow as defined in  claim 9 , wherein each of the baffles has a protrusion part joined to the through hole of the connecting part respectively.