Fan blade assembly

Abstract

A fan blade assembly includes a fan blade body, which has an axle housing downwardly suspending in a center accommodation open chamber thereof at the center and defining therein an axle hole and an inside annular flange in the axle hole, and a core shaft, which is inserted into the axle hole of the axle housing to support magnetic levitation rotation of the fan blade body and has a coupling groove extending around the periphery thereof and coupled to the inside annular flange of the axle housing with a gap left therebetween.

1 . A fan blade assembly comprising:
 a fan blade body, said fan blade body comprising a center accommodation open chamber and an axle housing downwardly suspending in said center accommodation open chamber at the center, said axle housing having an axle hole axially and downwardly extending to a bottom side thereof and an inside annular flange transversely extending around an inside wall and suspending in said axle hole; and   a core shaft inserted into said axle hole of said axle housing to support rotation of said fan blade body on said core shaft, said core shaft having a coupling groove extending around the periphery thereof and coupled to said inside annular flange of said axle housing.   
   
   
       2 . The fan blade assembly as claimed in  claim 1 , wherein said fan blade body comprises a locating hole on an outside wall thereof in axial alignment with said axle hole of said axle housing, and a magnetic member mounted in said locating hole to attract said core shaft. 
   
   
       3 . The fan blade assembly as claimed in  claim 1 , wherein said coupling groove is coupled to said inside annular flange with a gap about 0.1 mm left therebetween. 
   
   
       4 . A fan blade assembly comprising:
 a fan blade body, said fan blade body comprising a center accommodation open chamber, an axle housing downwardly suspending in said center accommodation open chamber at the center, said axle housing having an axle hole axially and downwardly extending to a bottom side thereof and an annular stop flange at the bottom side within said axle hole;   an axle bearing mounted in said axle hole inside said axle housing;   a core shaft inserted through said axle bearing in said axle hole of said axle housing of said fan blade body to support rotation of said fan blade body on said core shaft, said core shaft having a coupling groove extending around the periphery thereof; and   a retainer ring mounted in said axle hole inside said axle housing between said annular stop flange of said axle housing and said axle bearing and coupled to said coupling groove of said core shaft to secure said core shaft to said axle housing.   
   
   
       5 . The fan blade assembly as claimed in  claim 4 , wherein said retainer ring is coupled to said coupling groove with a gap about 0.1 mm left therebetween. 
   
   
       6 . The fan blade assembly as claimed in  claim 4 , wherein said axle bearing is a slide bearing. 
   
   
       7 . The fan blade assembly as claimed in  claim 4 , wherein said axle bearing is a ball bearing. 
   
   
       8 . The fan blade assembly as claimed in  claim 4 , wherein said fan blade body comprises a locating hole extending through a top wall of said center accommodation open chamber and axially connected to said axle hole of said axle housing, and a magnetic member mounted in said locating hole and stopped against said core shaft.