Back to results
US 4,059,898 AGranted
Method of making a small electric motor
OwnerGerald L. Adairinventor
Life of this patent
Estimating the term…
Abstract
Concentricity between the rotor and rotor shaft of a small motor is attained by means of a plastic, toothed hub on the shaft press fitted into the rotor; any eccentricity is removed by shearing the teeth.
Claims1
A method of assembling a cylindrical rotor and a metal rotor shaft into a rotor assembly for a subfractional dynamoelectric machine comprising the following steps:
- A. presenting to one end of the rotor a circular hub molded substantially concentrically to one end of the shaft, said hub having a toothed periphery of deformable and shearable plastic material softer than the rotor, and the outer diameter of the hub being larger than the inner diameter of the rotor;
- B. press-fitting the hub into the inner diameter of the rotor, while maintaining the outer diameters of the shaft and the rotor in concentric relation, the teeth of the hub distorting during press fitting to compensate for any eccentricity between the peripheral ends of the teeth and the inner diameter of the rotor.
Dependencies are inferred from the claim text.