CN-224204850-U - Motor rotor, motor and vehicle

CN224204850UCN 224204850 UCN224204850 UCN 224204850UCN-224204850-U

Abstract

The utility model discloses a motor rotor, a motor and a vehicle, wherein the motor rotor comprises a rotating shaft, a first rotor core group and a second rotor core group, a plurality of first oil channels are arranged in the first rotor core group, the first oil channels extend along the axial direction of the rotating shaft and penetrate through two end faces of the first rotor core group, a first channel is arranged in the second rotor core group, the first channel penetrates through two end faces of the second rotor core group, an annular gap is arranged between the outer peripheral wall of the rotating shaft and the inner wall of the first channel, the annular gap extends along the axial direction of the rotating shaft, the first oil channels are distributed along the circumferential direction of the annular gap, and the projection of each first oil channel along the axial direction of the rotating shaft is at least partially positioned in the annular gap so that each first oil channel is communicated with the annular gap. The motor rotor, the motor and the vehicle are relatively simple to assemble, and the heat dissipation structure can be conveniently arranged.

Inventors

HUANG DIMIAO
LI TAO
LI RUPENG
PENG HONG

Assignees

浙江极氪智能科技有限公司
威睿电动汽车技术(宁波)有限公司
浙江吉利控股集团有限公司

Dates

Publication Date: 20260505
Application Date: 20250526

Claims (10)

1. The motor rotor is characterized by comprising a rotating shaft, a first rotor core group and a second rotor core group, wherein the first rotor core group and the second rotor core group are sleeved on the rotating shaft, and the first rotor core group and the second rotor core group are stacked along the axial direction of the rotating shaft; A plurality of first oil channels are arranged in the first rotor core group, extend along the axial direction of the rotating shaft and penetrate through two end faces of the first rotor core group; a first channel is arranged in the second rotor core group, the first channel penetrates through two end faces of the second rotor core group, and the rotating shaft is arranged in the first channel; An annular gap is formed between the outer peripheral wall of the rotating shaft and the inner wall of the first channel, the annular gap extends along the axial direction of the rotating shaft, a plurality of first oil channels are distributed along the circumferential direction of the annular gap, and the projection of each first oil channel along the axial direction of the rotating shaft is at least partially positioned in the annular gap so that each first oil channel is communicated with the annular gap.
2. The electric machine rotor of claim 1, wherein the first passage is circular in cross-section, a minimum distance between each of the first oil passages and a central axis of the first passage is equal in a radial direction of the first passage, and the minimum distance is smaller than a radius of the first passage.
3. The motor rotor according to claim 2, wherein each of the first oil passages is provided at equal intervals in a circumferential direction of the annular gap.
4. The electric machine rotor of claim 2, wherein a maximum distance between each of the first oil passages and a central axis of the first passage in a radial direction of the first passage is equal, the maximum distance being greater than or equal to a radius of the first passage.
5. The motor rotor according to claim 1, wherein the first oil passage has a cross-sectional shape of a circle, a polygon, or a circular arc.
6. The electric machine rotor of claim 1, comprising a squirrel cage comprising a conductor bar and end rings connected at both ends of the conductor bar, the end rings abutting against one end of the first rotor core set facing away from the second rotor core set, wherein a projection of the end rings along an axial direction of the shaft is outside the first oil gallery in a radial direction of the shaft.
7. The electric machine rotor of claim 1, wherein the first rotor core groups are provided in plural, each of the first rotor core groups including a plurality of axially stacked first rotor sheets, the second rotor core group being sandwiched between two of the second rotor core groups, the second rotor core group including at least one second rotor sheet.
8. The electric machine rotor of claim 1, wherein the shaft has a shaft oil passage therein, the shaft oil passage including a first axially extending segment and a second radially extending segment, the second segment communicating between the first segment and the annular gap.
9. An electric machine comprising an electric machine rotor as claimed in any one of claims 1-8.
10. A vehicle comprising the electric machine of claim 9.

Description

Motor rotor, motor and vehicle Technical Field The present disclosure relates to motors, and particularly to a motor rotor, a motor, and a vehicle. Background The motor includes a stator and a rotor that rotates relative to the stator when the motor is in operation. Because the rotor can generate a large amount of heat in the continuous rotary motion process, the heat is difficult to timely emit, the service life and the stability of the motor are easily influenced by overheat of the rotor, and the rotor is required to be cooled. The technical scheme discloses including the motor shaft and the rotor core of cover locating the motor shaft, be equipped with the oil duct that is used for with cooling system intercommunication in the motor shaft, also be provided with the oil duct in the rotor core, rotor core's oil duct and the oil duct intercommunication of motor shaft, however suffer from its oil duct structure, the assembly is relatively difficult. Disclosure of utility model The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a motor rotor which is relatively simple to assemble. The utility model also provides a motor with the motor rotor. The utility model further provides a vehicle with the motor. According to an embodiment of the first aspect of the utility model, the motor rotor comprises a rotating shaft, a first rotor core group and a second rotor core group, wherein the first rotor core group and the second rotor core group are sleeved on the rotating shaft, and the first rotor core group and the second rotor core group are stacked along the axial direction of the rotating shaft; A plurality of first oil channels are arranged in the first rotor core group, extend along the axial direction of the rotating shaft and penetrate through two end faces of the first rotor core group; a first channel is arranged in the second rotor core group, the first channel penetrates through two end faces of the second rotor core group, and the rotating shaft is arranged in the first channel; An annular gap is formed between the outer peripheral wall of the rotating shaft and the inner wall of the first channel, the annular gap extends along the axial direction of the rotating shaft, a plurality of first oil channels are distributed along the circumferential direction of the annular gap, and the projection of each first oil channel along the axial direction of the rotating shaft is at least partially positioned in the annular gap so that each first oil channel is communicated with the annular gap. The motor rotor has the advantages that an annular gap is formed between the outer peripheral wall of the rotating shaft and the inner wall of the first channel, and oil flows into the annular gap from the rotating shaft and flows out after passing through the first oil duct. The first oil channels are circumferentially distributed along the annular gap, and the projection of each first oil channel along the axial direction is at least partially positioned in the annular gap, so that the change of the circumferential position of the second rotor core group does not affect the communication between each first oil channel and the annular gap, and therefore the second rotor core group and the first rotor core group do not need to be aligned in the circumferential direction in the assembly process, and the installation difficulty is reduced. In addition, the arrangement position of the first oil duct is not limited by the circumferential position of the second rotor core group, and the first oil duct can be designed more conveniently. According to some embodiments of the utility model, the first channels are circular in cross-section, a minimum distance between each of the first oil passages and a central axis of the first channel is equal along a radial direction of the first channel, and the minimum distance is smaller than a radius of the first channel. According to some embodiments of the utility model, each of the first oil passages is provided at equal intervals along a circumferential direction of the annular gap. According to some embodiments of the utility model, a maximum distance between each of the first oil passages and the central axis of the first passage is equal along a radial direction of the first passage, the maximum distance being greater than or equal to a radius of the first passage. According to some embodiments of the utility model, the first oil passage has a cross-sectional shape that is circular, polygonal, or circular arc. According to some embodiments of the utility model, the motor rotor comprises a squirrel cage, the squirrel cage comprises a conducting bar and end rings connected to two ends of the conducting bar, the end rings are propped against one end of the first rotor core group, which is away from the second rotor core group, wherein the projection of the end rings along the axial direction of the r