Patent ID: 8539665
Filing Date: 2013-09-24
Classification: B21D,H02K,Y10T

Abstract:
1. A method of manufacturing a rotor for an electric motor, comprising: producing a generally flat metal strip that includes (i) a plate having a first longitudinal end and a second longitudinal end, and (ii) a plurality of protrusions extending from the plate between the first longitudinal end and the second longitudinal end, bending a first section of the plate relative to a second section of the plate along an imaginary line extending between the first longitudinal end and the second longitudinal end, the second section of the plate having the plurality of protrusions extending therefrom, rolling the plate about an imaginary axis to form a cup-shaped body, the cup-shaped body including the plurality of protrusions extending radially inward, joining the first longitudinal end of the plate with the second longitudinal end of the plate, and attaching a hub to the plurality of protrusions, the hub being configured to receive a drive shaft of the electric motor.