Anti-vibration structure for cooling fan

Abstract

An anti-vibration structure for cooling fan includes a frame, a hub assembly, and an anti-vibration unit. The frame includes at least a first, a second, a third, and a fourth sidewall. Any of the four sidewalls is connected at two opposite ends to respective one end of two adjacent sidewalls, and a radially inward recess is formed at each joint of any two adjacent sidewalls. The hub assembly is mounted in the frame. The anti-vibration unit includes at least one main body, and the main body has one side adapted to fitly engage with the recess. The anti-vibration unit absorbs vibration produced by an operating cooling fan to thereby reduce noise and allow the cooling fan to have increased operating stability and prolonged service life.

1 . An anti-vibration structure for cooling fan, comprising:
 a frame having at least a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall;   any of the first, second, third, and fourth sidewalls being connected at two opposite ends to respective one end of two adjacent sidewalls, and a radially inward recess being formed at each joint of any two adjacent sidewalls;   a hub assembly being mounted in the frame; and   an anti-vibration unit including at least one main body, and the main body having one side adapted to fitly engage with the recess.   
   
   
       2 . The anti-vibration structure for cooling fan as claimed in  claim 1 , wherein the frame defines a first opening, a second opening opposite to the first opening, and an air passage communicating the first opening with the second opening. 
   
   
       3 . The anti-vibration structure for cooling fan as claimed in  claim 1 , wherein the first, the second, the third, and the fourth sidewall each are provided with at least one notch communicating with one recess adjacent thereto. 
   
   
       4 . The anti-vibration structure for cooling fan as claimed in  claim 3 , wherein the main body is provided at two lateral ends with an outward projected extension each; and the extensions being corresponding to the notches formed on the first, the second, the third, and the fourth sidewalls. 
   
   
       5 . The anti-vibration structure for cooling fan as claimed in  claim 4 , wherein the extensions each have a plurality of grooves formed thereon. 
   
   
       6 . The anti-vibration structure for cooling fan as claimed in  claim 1 , wherein the main body is engaged with the recess in a tight-fit relation. 
   
   
       7 . The anti-vibration structure for cooling fan as claimed in  claim 1 , wherein the main body is engaged with the recess by supersonic welding. 
   
   
       8 . The anti-vibration structure for cooling fan as claimed in  claim 6 , wherein the main body is engaged with the recess by supersonic welding. 
   
   
       9 . The anti-vibration structure for cooling fan as claimed in  claim 1 , wherein the main body is engaged with the recess by a manner selected from the group consisting of clamping, rabbet joint, and gluing. 
   
   
       10 . The anti-vibration structure for cooling fan as claimed in  claim 6 , wherein the main body is engaged with the recess by a manner selected from the group consisting of clamping, rabbet joint, and gluing. 
   
   
       11 . The anti-vibration structure for cooling fan as claimed in  claim 1 , wherein the main body of the anti-vibration unit is made of a material selected from the group consisting of a rubber material and any other material with vibration absorbing or cushioning ability. 
   
   
       12 . The anti-vibration structure for cooling fan as claimed in  claim 1 , wherein the main body of the anti-vibration unit is provided with a mounting hole axially extended through the main body. 
   
   
       13 . The anti-vibration structure for cooling fan as claimed in  claim 9 , wherein the main body of the anti-vibration unit is provided with a mounting hole axially extended through the main body.