Rotor assembly for an electric motor
AssigneeMilwaukee Electric Tool Corporation
InventorsRussell M. Rapant, Andrew T. Beyerl
Life of this patent
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Abstract
A method of forming a molded rotor assembly for an electric motor includes providing a lamination stack, molding an insulative material to the lamination stack to form an integral fan and magnet retention coupled to the lamination stack, the lamination stack and the integral fan and magnet retention together forming a rotor body, and pressing a shaft into a central aperture formed in the rotor body to achieve an interference fit between the shaft and the lamination stack.
Claims20
A method of forming a molded rotor assembly for an electric motor, the method comprising:
- providing a lamination stack;
- molding an insulative material to the lamination stack to form an integral fan and magnet retention coupled to the lamination stack, the lamination stack and the integral fan and magnet retention together forming a rotor body;
- and
- pressing a shaft into a central aperture formed in the rotor body to achieve an interference fit between the shaft and the lamination stack.
A method of manufacturing an electric motor, the method comprising:
- forming a molded rotor assembly by
- providing a lamination stack,
- molding an insulative material to the lamination stack to form an integral fan and magnet retention coupled to the lamination stack, the lamination stack and the integral fan and magnet retention together forming a rotor body, and
- pressing a shaft into a central aperture formed in the rotor body to achieve an interference fit between the shaft and the lamination stack;
- and
- providing a stator assembly operable to produce a rotating magnetic field with which the rotor assembly interacts.
Dependencies are inferred from the claim text.