Siemens Aktiengesellschaft

Ewald Wehner

Peter Adam

Adolf Lindner

Werner Schilling

This invention develops an automated procedure which permits the settling of the axial play of a rotor using a stator sleeve pressed onto the rotor shaft and held in place during assembly by an insulating end disc which mates at an end face with the laminated rotor core, whereby assuring the smallest number of assembly steps. According to this invention, the insulating end disc is injection-moulded in one piece along with the spacer sleeve with an intermediate weak rated point in the form of either elastic or break-away intermediate segments which permit a relative setting motion between the insulating end disc which contacts the end face of the laminated rotor core, and the spacer sleeve pressed on the rotor shaft. This invention is particularly suitable for small commutator motors with rotor shafts mounted in sleeve bearings.

Device and procedure to adjust the axial play between the rotor and the

A commutator motor brush mounting arrangement is arranged in an axial opening of an electric motor housing. The arrangement is provided with mounting bars which protrude axially from a support plate, the mounting bars being arranged at the interior of the motor housing. Hammer-shaped brush holders which are formed with half-open bearing shells are rotatably engaged with the mounting bars. Axial displacement of the brush holders in a first direction is prevented by the front plate, and in a second direction by an end plate. The end plate is provided with elastic openings for engaging posts arranged on the mounting bars in a self-locking manner. The support plate and the end plate are provided with respective complementary guide portions in the form of support ribs and corresponding depressions. Such guide portions rotatably secure the hammer-shaped brush holders to the mounting bars, so as to prevent canting and binding of the brush holders within the motor housing.

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Wurzberg, Germany

Ewald Wehner