Universal motor with a device for removing dust

摘要

A universal motor ( 2 ) includes at least two carbon brushes ( 36 ) contacting the commutator ( 14 ), a ventilation device ( 12 ) for producing a cooling flow (K), and a dust protection arrangement for preventing penetration of material particles (M) into the commutation region ( 34 ) and including at least one guide member ( 26 ) that provides for delivering of the material particles (M) in the cooling flow (K), with the at least one guide member ( 26 ) having a smooth concave guide surface ( 28 ) located between the two carbon brushes ( 36 ) and extending adjacent to an outer surface ( 30 ) of the commutator ( 14 ) and toward a suction opening ( 22 ) connected with the cooling flow path ( 24 ).