In order to insulate in a simple manner the basically bare rotor shaft region between the one rotor stack end face (21) and the oppositely located commutator end face (51) at its circumference, a sleeve (4) which can be upset (collapsed) axially, is fabricated as a unitized part and is formed preferably...http://www.google.es/patents/US4818910?utm_source=gb-gplus-sharePatente US4818910 - Commutator motor with an insulating cover for the rotor shaft
Commutator motor with an insulating cover for the rotor shaft
