Patent ID: 11929658
Assignee: NIDEC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  A  Y | IPC H

Claim 13:
14. An electric motor comprising:
a housing including a tubular wall extending in an axial direction of the housing and closures positioned at opposite axial ends of the tubular wall;
a stator fixedly mounted inside of the housing;
a rotor rotatably mounted inside of the housing;
a bearing rotatably supporting the rotor; wherein
at least one of the closures includes a rotor supporting portion that includes a through hole to receive a portion of the rotor;
the through hole is defined by a closed shape including at least three or more straight sides;
at least another one of the closures is separate from the tubular wall, and includes a radially inner portion which includes the rotor supporting portion and a radially outer flange which is in physical contact with a radially inner surface of the tubular wall and extends from the radially inner portion of the at least another one of the closures towards an opposite axial end of the tubular wall;
the radially inner surface of the tubular wall includes a positioner to be brought into physical contact with the radially outer flange of the at least another one of the closures which is separate from the tubular wall;
the positioner includes a step extending in the circumferential direction of the tubular wall and protruding radially inwardly.