| CPC H02K 9/19 (2013.01) [H02K 1/20 (2013.01); H02K 1/32 (2013.01); H02K 5/203 (2021.01); H02K 2209/00 (2013.01); H02K 2213/03 (2013.01)] | 24 Claims |
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1. A motor comprising:
a housing having an inner cavity and a housing oil inlet;
a stator comprising a stator core and a stator winding, the stator being disposed in the inner cavity of the housing, wherein a cooling oil channel is defined between an outer peripheral wall of the stator core and an inner peripheral wall of the housing, the cooling oil channel being in communication with the housing oil inlet;
a first end cover mounted at a first end of the housing;
a second end cover having an end cover oil inlet and mounted at a second end of the housing;
a first oil injection ring disposed on an inner side of the first end cover, wherein an oil injection space in communication with the cooling oil channel is defined between an outer peripheral wall of the first oil injection ring and the inner peripheral wall of the housing, and wherein a plurality of first oil injection holes is disposed on the first oil injection ring and arranged at intervals in a circumferential direction of the first oil injection ring, the plurality of first oil injection holes being in communication with the oil injection space to allow cooling oil to be injected from an outer periphery of the stator towards a first end of the stator winding;
a rotor comprising:
a rotor core, wherein a rotor oil path is formed in the rotor core;
a rotor magnet steel; and
a rotation shaft, wherein a rotation shaft oil path is formed in the rotation shaft, wherein a rotation shaft oil inlet and a rotation shaft oil outlet are disposed on the rotation shaft and are both in communication with the rotation shaft oil path, wherein a first end of the rotation shaft penetrates the first end cover and extends out of the housing, and wherein the rotation shaft oil inlet is in communication with the end cover oil inlet;
a first end plate disposed at a first end of the rotor core and engaged with the rotation shaft, wherein a first oil groove is disposed on an inner side surface of the first end plate opposite to the rotor core, and is in communication with the rotation shaft oil outlet and the rotor oil path, respectively, and wherein a first end plate oil outlet is disposed on an outer side surface of the first end plate and configured to communicate the first oil groove with the inner cavity of the housing; and
a second end plate disposed at a second end of the rotor core and engaged with the rotation shaft, wherein a second oil groove is disposed on an inner side surface of the second end plate opposite to the rotor core, and is in communication with the rotor oil path, and wherein a second end plate oil outlet is disposed on an outer side surface of the second end plate and configured to communicate the second oil groove with the inner cavity of the housing.
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