Axial blow fan, has two companion flanges associated with flanges of hub, and clamping device clamping each blade between flanges and companion flanges through screw, where all flanges are formed by injection molding

摘要

The fan has two blades (1), and a hub including two flanges (2) for fixing the blades on the hub. Two companion flanges (3) are associated with the flanges (2) and include notches. A clamping device (4) is utilized for clamping each blade between the flanges and the companion flanges through a screw (5), where both the flanges (2, 3) are formed by injection molding.