ROTOR FOR ELECTRIC MOTOR

摘要

A rotor for an electric motor includes: an engagement portion formed in a groove shape in an outer periphery of a rotor shaft; and an annular ring member that is attached to the engagement portion such that an elastic force acting in a direction for clamping the rotor shaft is generated in order to restrict movement of the rotor core in a single direction along an axis of the rotor core. An outer diameter of the rotor shaft in the engagement portion increases steadily away from the rotor core.)