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

Claim 6:
7. 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 provided with a non-rotationally symmetric shape;
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 closure 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 one of the closures which is separate from the tubular wall; and
the positioner includes a step extending in the circumferential direction of the tubular wall and protruding radially inwardly.