Patent ID: 11962217
Assignee: NIDEC MOTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electric motor comprising:
a stator assembly;
a rotor assembly including a rotor shaft rotatable relative to the stator assembly about a rotation axis;
an endshield;
a bearing assembly rotatably supporting the rotor shaft on the endshield;
a shaft ground assembly electrically coupled to the rotor shaft; and
a bearing lockplate fixedly coupled to the endshield,
said shaft ground assembly being supported by the bearing lockplate on the endshield,
the endshield presenting an interior surface and including an annular wall extending axially inward from the interior surface,
the annular wall defining a bearing pocket arranged substantially concentric with the rotation axis,
the bearing assembly being positioned at least partially in the bearing pocket,
the endshield including a plurality of internal tabs that extend axially inward from the annular wall,
the bearing lockplate including a plurality of arcuate slots defined therein, with each of said slots receiving a respective one of the internal tabs,
each of the internal tabs being arcuately undersized relative to the respective slot so as to permit limited arcuate shifting of the bearing lockplate relative to the endshield.