COMMUTATOR FAN COUPLING

摘要

The invention is related to a by-pass type electrical vacuum cleaner motor that lengthens the service life of the roller (9) at the commutator side by protecting it from the carbon dusts and that prevents the deterioration of the roller grease. A radial fan is mounted on the surface (2) of the commutator (1) facing the roller (9) in such a manner that it rotates together with the commutator, and it prevents the carbon dusts from penetrating into the roller (9) by providing an air flow to avoid the irregular air flow and turbulences generated when the cooling air is struck onto the commutator upper surface (2) and returns to the roller bearing (10), and directs the air and therefore the carbon dusts towards the lateral surface of the commutator with a smooth and regular flow.