US 3,945,476 AGranted

Motor construction

AssigneeQuick-Rotan Becker & Notz KG

InventorWilhelmus Maria de Jong

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Abstract

A stator is mounted in a housing, and a rotor is rotatable with reference to the stator and rotates with a motor shaft. A flywheel is mounted on and rotatable with the motor shaft. An output shaft is separate from the motor shaft and a stationary member is mounted in the housing and surrounds the output shaft with clearance. A coupling plate and a braking plate are both mounted on the output shaft for rotation therewith, being located axially adjacent the flywheel and the stationary member, respectively. A first electromagnet is associated with the coupling plate and when energized causes frictional engagement of the latter with the flywheel so that the coupling plate and thereby the output shaft are entrained in rotation by the flywheel. A second electromagnet is associated with the braking plate and when energized causes frictional engagement thereof with the stationary member so that the braking plate and the output shaft are braked by frictional engagement therewith. The electromagnets are radially spaced and define with one another an airgap, and components are provided which produce an airflow through the housing, including through the airgap between the two electromagnets.

Claims24

Dependent claims

In a motor, a combination comprising housing means;

a stator mounted in said housing means, a rotor rotatable with reference to said stator, and a rotor shaft rotatable with said rotor;
a flywheel mounted on and rotatable with said rotor shaft;
an output shaft separate from said rotor shaft;
a stationary braking member mounted in said housing means and surrounding said output shaft with clearance;
a coupling plate mounted on said output shaft axially adjacent said flywheel;
a braking plate mounted on said output shaft axially spaced from said coupling plate and axially adjacent said stationary braking member;
a first electromagnet associated with said coupling plate and energizable for effecting frictional enagement thereof with said flywheel so as to be entrained by the latter;
a second electromagnet associated with said braking plate and energizable for effecting frictional engagement with said stationary braking member so as to be braked by the same, said electromagnets being located in the space between said coupling plate and said braking plate and being axially and radially spaced from each other to define with one another a continuous air gap;
and air flow producing means for producing a flow of air through said housing means and through said air gap between said electromagnets.

6 more elements

Dependencies are inferred from the claim text.