Fan blade assemlby

Abstract

A fan blade assembly comprises: a motor-mounting seat and a plurality of spaced-apart fan blades extending from a periphery of the motor-mounting seat. The fan blades each are provided with a vibration-blocking unit in the form of a concave structure, which makes the fan blades become a non-flat structure. The vibration-blocking unit reduces the vibration and noise of the fan blade assembly, it further increases the structural strength while relatively reducing the thickness of the fan blades, so that the material cost of the fan blades is reduced.

1 . A fan blade assembly comprising: a motor-mounting seat and a plurality of spaced-apart fan blades extending from a periphery of the motor-mounting seat, the fan blades each including a connecting edge, an opposite outer edge, and a leading edge and a trailing edge between the connecting edge and the opposite outer edge, the connecting edge being connected to the periphery of the motor-mounting seat, a vibration-blocking unit being formed in each of the fan blades and extending from the trailing edge to the leading edge, making the fan blades become a non-flat structure, the vibration-blocking unit having a length smaller than half of a length of the trailing edge. 
     
     
         2 . The fan blade assembly as claimed in  claim 1 , wherein the motor-mounting seat is formed with a through hole for insertion of a shaft of a fan motor. 
     
     
         3 . The fan blade assembly as claimed in  claim 1 , wherein the opposite outer edge is arc-shaped. 
     
     
         4 . The fan blade assembly as claimed in  claim 1 , wherein the vibration-blocking unit is an arc-shaped concave. 
     
     
         5 . The fan blade assembly as claimed in  claim 1 , wherein a periphery of the vibration-blocking unit is arc-shaped. 
     
     
         6 . The fan blade assembly as claimed in  claim 1 , wherein the fan blade assembly is mounted on a fan support, and the motor-mounting seat is connected to the fan motor.