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

Claim 7:
8. 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; and
the at least one of the closures is integral with the to wall;
the rotor supporting portion of the at least one of the closures integral with the tubular wall includes a circumferential wall extending in the axial direction to receive the bearing therein to rotatably support an axial end portion of the rotor; and
the rotor supporting portion of the at least one of the closures integral with the tubular wall includes an axial end wall including the through hole, and a bearing insertion opening into which the bearing is inserted;
the axial end wall is located at an axial end on an inner side of the housing with respect to the circumferential wall; and
the bearing insertion opening is located at an axial end on an outer side of the housing with respect to the circumferential wall.