CN213243761U - Rotor assembly, motor and vehicle with motor - Google Patents

Rotor assembly, motor and vehicle with motor Download PDF

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Publication number
CN213243761U
CN213243761U CN202021586521.7U CN202021586521U CN213243761U CN 213243761 U CN213243761 U CN 213243761U CN 202021586521 U CN202021586521 U CN 202021586521U CN 213243761 U CN213243761 U CN 213243761U
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China
Prior art keywords
end plate
oil
oil outlet
rotor
groove
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Active
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CN202021586521.7U
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Chinese (zh)
Inventor
蒲晓敏
王飞
高劲军
胡义明
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Anqing Weiling Auto Parts Co ltd
Guangdong Welling Auto Parts Co Ltd
Anhui Welling Auto Parts Co Ltd
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Guangdong Welling Auto Parts Co Ltd
Anhui Welling Auto Parts Co Ltd
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Application filed by Guangdong Welling Auto Parts Co Ltd, Anhui Welling Auto Parts Co Ltd filed Critical Guangdong Welling Auto Parts Co Ltd
Priority to CN202021586521.7U priority Critical patent/CN213243761U/en
Application granted granted Critical
Publication of CN213243761U publication Critical patent/CN213243761U/en
Priority to PCT/CN2021/110151 priority patent/WO2022028382A1/en
Priority to EP21853052.5A priority patent/EP4131743A4/en
Priority to US17/994,909 priority patent/US20230116766A1/en
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Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a rotor assembly, the rotor assembly comprises a rotor, a first end plate and a second end plate, the rotor comprises a rotor iron core, rotor magnetic steel and a rotating shaft, a rotor oil circuit is arranged in the rotor iron core, a rotating shaft oil circuit is arranged in the rotating shaft, and the rotating shaft is provided with a rotating shaft oil inlet and a rotating shaft oil outlet which are communicated with the rotating shaft oil circuit; the first end plate is arranged at the first end of the rotor core, a first oil groove is arranged on the inner side surface of the first end plate, the first oil groove is respectively communicated with the rotating shaft oil outlet hole and the rotor oil path, and a first end plate oil outlet hole is arranged on the outer side surface of the first end plate; the second end plate is arranged at the second end of the rotor core and provided with a second oil groove, the second oil groove is communicated with the rotor oil way, and the second end plate is provided with a second end plate oil outlet hole. According to the utility model discloses the rotor subassembly, the cooling effect is good, but also can improve and cool down to other subassemblies of the motor inside that have this rotor subassembly, and the holistic radiating efficiency of motor is high, has effectively improved the performance of motor.

Description

Rotor assembly, motor and vehicle with motor
Technical Field
The utility model relates to the technical field of electric machines, specifically, relate to a rotor subassembly, motor and have vehicle of this motor.
Background
At present, a driving motor of a new energy automobile gradually tends to high power density and high speed, so that higher requirements on the heat dissipation capacity of the motor are provided. The high heat of the motor directly affects the life of the motor insulation and the reliability of the motor operation.
Among the correlation technique, cooling mode to the rotor subassembly includes at the inside cooling oil that adds of motor, makes the rotor soak in the cooling oil, gets rid of the oil through the rotation of rotor and cools off on the motor, but, adopts this kind of method to cool off and can cause the motor air gap inhomogeneous, and makes the atress of rotor appear unbalanced, causes the influence to the normal use of motor easily, and the cooling effect is poor.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
To this end, embodiments of the first aspect of the present invention provide a rotor assembly with improved cooling effect.
Embodiments of a second aspect of the invention propose an electric machine having a rotor assembly as described above.
An embodiment of a third aspect of the invention proposes a vehicle having the above-described electric machine.
The rotor component according to the embodiment of the utility model comprises a rotor, a first end plate and a second end plate,
the rotor comprises a rotor iron core, rotor magnetic steel and a rotating shaft, a rotor oil circuit is arranged in the rotor iron core, a rotating shaft oil circuit is arranged in the rotating shaft, and the rotating shaft is provided with a rotating shaft oil inlet and a rotating shaft oil outlet which are communicated with the rotating shaft oil circuit; the first end plate is arranged at the first end of the rotor core and matched with the rotating shaft, a first oil groove is arranged on the inner side surface of the first end plate opposite to the rotor core and is respectively communicated with the rotating shaft oil outlet and the rotor oil path, and a first end plate oil outlet communicated with the first oil groove is arranged on the outer side surface of the first end plate; the second end plate is arranged at the second end of the rotor core and matched with the rotating shaft, a second oil groove is formed in the inner side face, opposite to the rotor core, of the second end plate, the second oil groove is communicated with the rotor oil way, and an oil outlet hole of the second end plate, communicated with the second oil groove, is formed in the outer side face of the second end plate.
According to the utility model discloses rotor subassembly is equipped with rotor oil circuit and pivot oil circuit, rotor oil circuit and pivot oil circuit intercommunication, and the pivot oil circuit cools off the countershaft, and the rotor oil circuit cools off rotor magnet steel, reduces the magnet steel temperature rise, promotes the output performance of motor under high-speed operating mode. And partial cooling oil is thrown out from the first end plate oil outlet, and the rest of cooling oil is thrown out from the second end plate oil outlet after passing through the rotor oil way, so that other components in the motor with the rotor assembly can be cooled, the overall heat dissipation efficiency of the motor is high, and the performance of the motor is improved.
In some embodiments, the number of first end plate oil outlet holes is N1 and the first end plate oil outlet holes are evenly arranged along the circumference of the first end plate, the number of second end plate oil outlet holes is N2 and the second end plate oil outlet holes are evenly arranged along the circumference of the second end plate, where N1 < N2.
In some embodiments, the number of first end plate oil outlet holes is different from the number of second end plate oil outlet holes.
In some embodiments, the number of first end plate oil outlet holes is less than the number of second end plate oil outlet holes.
In some embodiments, the first end plate oil outlet hole has a smaller diameter than the second end plate oil outlet hole.
In some embodiments, the first oil groove includes a first connecting groove, a first guiding groove, and a first oil outlet groove, a first end of the first connecting groove communicates with the rotating shaft oil outlet, a second end of the first connecting groove communicates with the first guiding groove, a first end of the first oil outlet groove communicates with the first guiding groove, and a second end of the first oil outlet groove communicates with the first end plate oil outlet.
In some embodiments, the first connecting groove is a plurality of grooves arranged at intervals along the circumferential direction of the first end plate, the first connecting groove extends along the radial direction of the first end plate, the first oil outlet groove is a plurality of grooves arranged at intervals along the circumferential direction of the first end plate, and the first oil outlet groove extends along the radial direction of the first end plate.
In some embodiments, the first connecting groove is offset from the first oil outlet groove in a radial direction of the first end plate.
In some embodiments, the second oil groove includes a second guide groove and a second oil outlet groove, the second guide groove is communicated with the rotor oil passage, a first end of the second oil outlet groove is communicated with the second guide groove, and a second end of the second oil outlet groove is communicated with the second end plate oil outlet hole.
In some embodiments, the second oil outlet groove is a plurality of grooves arranged at intervals in the circumferential direction of the second end plate, and the second oil outlet groove extends in the radial direction of the second end plate.
In some embodiments, the opening direction of the outlet end of the first end plate oil outlet hole faces outward in the radial direction of the first end plate, and/or the opening direction of the outlet end of the second end plate oil outlet hole faces outward in the radial direction of the second end plate.
The electric machine according to an embodiment of the second aspect of the invention comprises a rotor assembly which is an electric machine according to an embodiment of the first aspect of the invention.
A vehicle according to an embodiment of the third aspect of the invention includes the motor according to the embodiment of the second aspect of the invention.
Drawings
Fig. 1 is a schematic view of a rotor assembly according to an embodiment of the present invention;
fig. 2 is a schematic view of a rotating shaft according to an embodiment of the present invention;
fig. 3 is a schematic view of a first end plate according to an embodiment of the invention;
fig. 4 is another schematic view of a first end plate according to an embodiment of the invention;
fig. 5 is a schematic view of a second end plate according to an embodiment of the invention;
fig. 6 is another schematic view of a second end plate according to an embodiment of the invention;
reference numerals:
1. a rotor core; 11. a rotor oil path;
2. a rotating shaft; 21. a rotating shaft oil circuit; 22. an oil inlet of the rotating shaft; 23. an oil outlet of the rotating shaft;
3. a first end plate; 31. a first connecting groove; 32. a first guide groove; 33. a first oil outlet groove; 34. the first end plate is provided with an oil outlet;
4. a second end plate; 41. a second guide groove; 42. a second oil outlet groove; 43. and the oil outlet of the second end plate.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1 and 2, a rotor assembly according to an embodiment of the present invention includes a rotor, a first end plate 3, and a second end plate 4. The rotor includes rotor core 1, rotor magnet steel (not marked) and pivot 2, and pivot 2 just runs through rotor core 1 with rotor core 1 cooperation. A rotor oil path 11 which penetrates through the rotor core 1 along the axial direction of the rotor core 1 is arranged in the rotor core 1, a rotating shaft oil path 21, a rotating shaft oil inlet 22 and a rotating shaft oil outlet 23 are arranged in the rotating shaft 2, and the rotating shaft oil inlet 22 and the rotating shaft oil outlet 23 are communicated with the rotating shaft oil path 21.
First end plate 3 establishes the first end at rotor core 1, and second end plate 4 establishes the second end at rotor core 1, and first end plate 3 and second end plate 4 all cooperate with pivot 2, and first end of pivot 2 passes first end plate 3 promptly, and second end of pivot 2 passes second end plate 4. Wherein, the first end of the rotor core 1 refers to the left end in fig. 1, and the second end of the rotor core 1 refers to the right end in fig. 1.
As shown in fig. 3 and 4, a first oil groove is provided on an inner side surface of the first end plate 3 facing the rotor core 1, the first oil groove is respectively communicated with the rotating shaft oil outlet 23 and the rotor oil passage 11, a first end plate oil outlet 34 communicated with the first oil groove is provided on an outer side surface of the first end plate 3, similarly, a second oil groove is provided on an inner side surface of the second end plate 4 facing the rotor core 1, the second oil groove is communicated with the rotor oil passage 11, and a second end plate oil outlet 44 communicated with the second oil groove is provided on an outer side surface of the second end plate 4.
The cooling oil enters the rotating shaft oil path 21 through the rotating shaft oil inlet 22, enters the first oil groove through the rotating shaft oil outlet 23, is thrown out through the first end plate oil outlet 34 under the action of centrifugal force, enters the rotor oil path 11 through the rest part, enters the second oil groove, is thrown out through the second end plate oil outlet 44, enters the inner cavity of the motor through the cooling oil thrown out through the first end plate oil outlet 34 and the second end plate oil outlet 44, cooling of the motor is achieved, and finally all the cooling oil is discharged through the oil outlet.
According to the utility model discloses rotor subassembly is equipped with rotor oil circuit 11 and pivot oil circuit 21, and rotor oil circuit 11 and pivot oil circuit 21 intercommunication, pivot oil circuit 21 cool off the pivot, and rotor oil circuit 11 cools off the rotor magnet steel, reduces rotor magnet steel temperature rise, promotes the output performance of the motor that has this rotor subassembly under high-speed operating mode. And part of the cooling oil is thrown out from the first end plate oil outlet 34, and the rest of the cooling oil is thrown out from the second end plate oil outlet 44 after passing through the rotor oil circuit 11, so that other components in the motor are cooled, the overall heat dissipation efficiency of the motor is high, and the performance of the motor is improved.
In some embodiments, the first oil groove includes a first communication groove 31, a first guide groove 32, and a first oil outlet groove 33, a first end of the first communication groove 31 communicates with the rotating shaft oil outlet hole 23, and a second end of the first communication groove 31 communicates with the first guide groove 32. As shown in fig. 3, the first guide groove 32 is preferably annular. The cooling oil in the rotating shaft oil path 21 enters the first connecting groove 31 through the rotating shaft oil outlet 23, flows from the first end of the first connecting groove 31 to the second end, flows into the first guide groove 32 from the second end of the first connecting groove 31, enters the first end of the first oil outlet groove 33 through the first guide groove 32, is sprayed out through the second end of the first oil outlet groove 33 and the first end plate oil outlet 34, and the rest of the cooling oil enters the rotor oil path 11 through the first guide groove 32 and flows to the second oil groove.
As shown in fig. 5 and 6, the second oil groove includes a second guide groove 42 and a second oil outlet groove 43, and the second guide groove 42 communicates with the rotor oil passage 11. The second guide groove 42 is preferably annular. The second end of the second oil outlet groove 43 communicates with the second end plate oil outlet hole 44. The cooling oil in the rotor oil passage 11 first flows into the second guide groove 42, flows into the first end of the second oil outlet groove 43 through the second guide groove 42, and is finally thrown out through the second end plate oil outlet hole 44.
It should be noted that, in the above description, the first end plate 3 differs from the second end plate 4 in that the first end plate 3 has the first communicating groove 31 communicating with the spindle oil outlet hole 23, and the second end plate 4 does not have the communicating groove. However, for convenience of processing and cost reduction, for example, when the first end plate 3 and the second end plate 4 are processed, the same mold can be used for manufacturing, the second end plate 4 is also processed with the second communicating groove 41 similar to the first communicating groove 31, and since the rotating shaft is not provided with the rotating shaft oil outlet hole communicated with the second communicating groove 41, the coolant cannot enter the second communicating groove 41 from the rotating shaft oil outlet hole, thereby not affecting the normal use of the second end plate 4.
In some embodiments, the first communicating groove 31 is plural and is spaced along the circumferential direction of the first end plate 3, the first communicating groove 31 extends along the radial direction of the first end plate 3, the first oil outlet groove 33 is plural and is spaced along the circumferential direction of the first end plate 3, the first oil outlet groove 33 extends along the radial direction of the first end plate 3, and similarly, the second oil outlet groove 43 is plural and is spaced along the circumferential direction of the second end plate 4, and the second oil outlet groove 43 extends along the radial direction of the second end plate 4. It should be noted that the number of the first communicating grooves 31 and the number of the first oil outlet grooves 33 may be different, and the number of the first oil outlet grooves 33 and the number of the second oil outlet grooves 43 may be different.
In some embodiments, the first communicating groove 31 and the first oil outlet groove 33 are staggered in the radial direction of the first end plate 3, in other words, the first communicating groove 31 and the first oil outlet groove 33 cannot be aligned with each other.
The number of the first connecting grooves 31 and the first oil outlet grooves 33 is multiple, and each first connecting groove 31 is radially staggered with the first oil outlet groove 33 on the first end plate 3, so as to ensure that under the condition that the number of the rotating shaft oil outlet holes 23 is different from the number of the first connecting grooves 31, the cooling oil entering the first connecting grooves 31 through the rotating shaft oil outlet holes 23 can flow in the first guide grooves 32, so that each first oil outlet groove 33 can have the cooling oil flowing in, but the cooling oil directly enters the first oil outlet grooves 33 from the first connecting grooves 31.
In some embodiments, the number of the first header oil outlet holes 34 is N1, the first header oil outlet holes 34 are evenly arranged along the circumference of the first header 3, the number of the second header oil outlet holes 44 is N2, and the second header oil outlet holes 44 are evenly arranged along the circumference of the second header 4, where N1 < N2.
It should be noted that, when the utility model discloses in the casing of motor was installed to the rotor subassembly, the second end plate corresponds with the leading-out terminal of establishing the stator winding in the rotor subassembly outside, stator winding's lead-out wire extends the casing of motor from second end plate one side promptly, because stator winding's leading-out terminal has the lead-out wire and highly is higher than stator winding's non-leading-out terminal, consequently, calorific capacity is big, comparatively speaking, stator winding's non-leading-out terminal does not have the lead-out wire and highly is higher than stator winding's leading-out terminal, consequently, calorific capacity is relatively little, therefore, through setting up the quantity with second end plate oil outlet into the quantity that is greater than first end plate oil outlet, can further improve the cooling. Of course, if the outgoing lines of the stator winding extend out of the casing of the motor from the first end plate side, the number of the first end plate oil outlet holes is set to be greater than that of the second end plate oil outlet holes correspondingly.
In addition, the number of the first-end plate oil outlet holes 34 and the number of the second-end plate oil outlet holes 43 may be different. Preferably, the number of first end plate oil outlet holes 34 is less than the number of second end plate oil outlet holes 43. Therefore, the balanced cooling of the two ends of the stator winding can be better realized.
Alternatively, the first-end-plate oil outlet holes 34 have a smaller diameter than the second-end-plate oil outlet holes 43. Therefore, the balanced cooling of the two ends of the stator winding can be better realized.
In some embodiments, the number of the first end plate oil outlet holes 34 is two, the number of the second end plate oil outlet holes 44 is four, the first end plate oil outlet holes 34 are oppositely arranged along the radial direction of the first end plate 3, and the second end plate oil outlet holes 44 are uniformly arranged along the circumferential direction of the second end plate 4.
As shown in fig. 3 and 5, the number of the first oil outlet grooves 33 and the number of the second oil outlet grooves 43 are four, two first end plate oil outlet holes 34 are formed in two opposite first oil outlet grooves 33, and four second end plate oil outlet holes 44 are formed in four second oil outlet grooves 43, so that it can be better ensured that part of the cooling oil can enter the rotor oil passage 11 through the first oil grooves, and then the cooling oil can be sprayed out of the oil outlet holes 44 through the second end plate oil outlet holes 44.
In some embodiments, the opening direction of the outlet ends of the first end plate oil outlet holes 34 faces outward in the radial direction of the first end plate. In other embodiments, the outlet ends of the second end plate oil outlet holes 44 are opened in a direction radially outward of the second end plate. The oil outlet holes 44 can thereby better inject the cooling oil directly to the end portions of the stator windings on the outer periphery of the rotor core 1, improving the cooling efficiency. Oil outlet 44
A rotor assembly according to some specific examples of the present invention is described below with reference to fig. 1 to 6.
As shown in fig. 1 and 2, the rotor assembly comprises a rotor, a first end plate and a second end plate 4. The rotor includes rotor core 1, rotor magnet steel and pivot 2, is equipped with pivot oil circuit 21 in the pivot 2, is equipped with rotor oil circuit 11 in the rotor core 1, and the first end of pivot 2 is equipped with pivot oil outlet 23, and the second end of pivot 2 is equipped with pivot oil inlet 22.
First end of rotor core 1 is equipped with first end plate 3, and the second end of rotor core 1 is equipped with second end plate 4, and first end plate 3 is equipped with first oil groove, is equipped with the second oil groove on the second end plate 4, first oil groove and rotor oil outlet and rotor oil circuit 11 intercommunication, second oil groove and rotor oil circuit 11 intercommunication.
As shown in fig. 3 to 6, the first end plate 3 is provided with a first end plate oil outlet hole 34, and the second end plate 4 is provided with a second end plate oil outlet hole 44, the first end plate oil outlet hole 34 communicating with the first oil groove, and the second end plate oil outlet hole 44 communicating with the second oil groove.
The first oil groove comprises a first connecting groove 31, a first guide groove 32 and a first oil outlet groove 33, a first end of the first connecting groove 31 is communicated with the rotating shaft oil outlet hole 23, a second end of the first connecting groove 31 is communicated with the first guide groove 32, and the first guide groove 32 is communicated with the rotor oil path 11; the second oil groove includes a second guide groove 42 and a second oil outlet groove 43, and the second guide groove 42 communicates with the rotor oil passage 11. The cooling oil in the rotating shaft oil path 21 enters the first connecting groove 31 through the rotating shaft oil outlet 23, flows from the first end of the first connecting groove 31 to the second end, flows into the first guide groove 32 from the second end of the first connecting groove 31, enters the first end of the first oil outlet groove 33 through the first guide groove 32, is sprayed out through the second end of the first oil outlet groove 33 and the first end plate oil outlet 34, and the rest of the cooling oil enters the rotor oil path 11 through the first guide groove 32, flows to the second guide groove 42, flows into the first end of the second oil outlet groove 43 through the second guide groove 42, and is finally thrown out through the second end plate oil outlet 44.
First connecting groove 31 is four and follows the circumference interval arrangement of first endplate 3, and first connecting groove 31 is along the radial extension of first endplate 3, and first oil groove 33 is four and follows the circumference interval arrangement of first endplate 3, and first oil groove 33 is along the radial extension of first endplate 3, and two adjacent first connecting grooves 31 and two adjacent contained angles that go out the oil groove are 90 degrees, and first connecting groove 31 and first oil groove 33 staggered arrangement.
The number of the first end plate oil outlet holes 34 is two, and the first end plate oil outlet holes are arranged along the radial direction of the first end plate 3 and are respectively communicated with the second ends of the two first oil outlet grooves 33.
The second oil outlet grooves 43 are four and are arranged at intervals in the circumferential direction of the second end plate, and the second oil outlet grooves 43 extend in the radial direction of the second end plate 4. The included angle between two adjacent second oil outlet grooves 43 is 90 degrees.
The number of the second end plate oil outlet holes 44 is four, the second end plate oil outlet holes are evenly arranged along the circumferential direction of the second end plate 4 and are respectively communicated with the four second oil outlet grooves 43, and the second end plate oil outlet holes 44 and the second oil outlet grooves 43 are in one-to-one correspondence.
The opening direction of the outlet end of the first end plate oil outlet hole 34 faces outwards along the radial direction of the first end plate, and the opening direction of the second end plate oil outlet hole 44 faces outwards along the radial direction of the second end plate, so that the thrown cooling oil can be directly sprayed to the first end and the second end of the stator winding positioned on the periphery of the rotor core 1, and the cooling effect is improved.
The motor comprises the rotor assembly, the rotor assembly can be the rotor assembly of the embodiment, and the heat dissipation effect of the motor is effectively improved by arranging the rotor oil path and the rotating shaft oil path which are communicated.
According to the embodiment of the invention, the vehicle comprises the motor, the motor can be the motor of the embodiment, and the performance of the vehicle is improved by improving the heat dissipation efficiency of the motor. The vehicle may be a pure electric vehicle, and may also be a new energy vehicle in other forms, and of course, in the embodiment of the present invention, the vehicle is not limited thereto.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (13)

1. A rotor assembly, comprising:
the rotor comprises a rotor iron core, rotor magnetic steel and a rotating shaft, a rotor oil circuit is arranged in the rotor iron core, a rotating shaft oil circuit is arranged in the rotating shaft, and the rotating shaft is provided with a rotating shaft oil inlet and a rotating shaft oil outlet which are communicated with the rotating shaft oil circuit;
the first end plate is arranged at the first end of the rotor core and matched with the rotating shaft, a first oil groove is arranged on the inner side surface of the first end plate opposite to the rotor core and is respectively communicated with the rotating shaft oil outlet and the rotor oil way, and a first end plate oil outlet communicated with the first oil groove is arranged on the outer side surface of the first end plate;
the second end plate, the second end plate is established rotor core's second end and with the pivot cooperation, the second end plate with be equipped with the second oil groove on the medial surface that rotor core is relative, the second oil groove with rotor oil circuit intercommunication, the lateral surface of second end plate be equipped with the second end plate oil outlet of second oil groove intercommunication.
2. The rotor assembly of claim 1 wherein the number of first end plate oil holes is N1 and the first end plate oil holes are evenly arranged along the circumference of the first end plate, the number of second end plate oil holes is N2 and the second end plate oil holes are evenly arranged along the circumference of the second end plate, where N1 < N2.
3. The rotor assembly of claim 1 wherein the number of first end plate oil outlet holes is different than the number of second end plate oil outlet holes.
4. The rotor assembly of claim 3 wherein the number of first end plate oil outlet holes is less than the number of second end plate oil outlet holes.
5. The rotor assembly of claim 1 wherein the first end plate oil outlet has a smaller bore diameter than the second end plate oil outlet.
6. The rotor assembly of claim 1 wherein the first oil groove comprises a first communicating groove, a first guiding groove and a first oil outlet groove, a first end of the first communicating groove is communicated with the rotating shaft oil outlet, a second end of the first communicating groove is communicated with the first guiding groove, a first end of the first oil outlet groove is communicated with the first guiding groove, and a second end of the first oil outlet groove is communicated with the first endplate oil outlet.
7. The rotor assembly of claim 6 wherein the first connecting slots are plural and are circumferentially spaced along the first end plate, the first connecting slots extend radially of the first end plate, the first oil outlet slots are plural and are circumferentially spaced along the first end plate, and the first oil outlet slots extend radially of the first end plate.
8. The rotor assembly of claim 7 wherein the first connecting slot is radially offset from the first oil outlet slot in the first end plate.
9. The rotor assembly of claim 6 wherein the second oil sump includes a second guide groove and a second oil outlet groove, the second guide groove being in communication with the rotor oil passage, a first end of the second oil outlet groove being in communication with the second guide groove, and a second end of the second oil outlet groove being in communication with the second end plate oil outlet hole.
10. The rotor assembly of claim 9 wherein the second oil outlet groove is a plurality of grooves spaced circumferentially about the second end plate, the second oil outlet groove extending radially of the second end plate.
11. The rotor assembly of claim 1 wherein the outlet ends of the first end plate oil outlets open radially outward of the first end plate and/or the outlet ends of the second end plate oil outlets open radially outward of the second end plate.
12. An electric machine comprising a rotor assembly, the rotor assembly being a machine housing according to any one of claims 1 to 11.
13. A vehicle characterized by comprising an electric machine according to claim 12.
CN202021586521.7U 2020-08-03 2020-08-03 Rotor assembly, motor and vehicle with motor Active CN213243761U (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202021586521.7U CN213243761U (en) 2020-08-03 2020-08-03 Rotor assembly, motor and vehicle with motor
PCT/CN2021/110151 WO2022028382A1 (en) 2020-08-03 2021-08-02 Motor and vehicle
EP21853052.5A EP4131743A4 (en) 2020-08-03 2021-08-02 Motor and vehicle
US17/994,909 US20230116766A1 (en) 2020-08-03 2022-11-28 Motor and vehicle

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Application Number Priority Date Filing Date Title
CN202021586521.7U CN213243761U (en) 2020-08-03 2020-08-03 Rotor assembly, motor and vehicle with motor

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CN213243761U true CN213243761U (en) 2021-05-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115173602A (en) * 2022-07-28 2022-10-11 小米汽车科技有限公司 Rotor subassembly, motor and vehicle
CN116599286A (en) * 2023-05-17 2023-08-15 小米汽车科技有限公司 Balance disc for motor, rotor assembly, motor and vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115173602A (en) * 2022-07-28 2022-10-11 小米汽车科技有限公司 Rotor subassembly, motor and vehicle
CN115173602B (en) * 2022-07-28 2023-08-29 小米汽车科技有限公司 Rotor assembly, motor and vehicle
CN116599286A (en) * 2023-05-17 2023-08-15 小米汽车科技有限公司 Balance disc for motor, rotor assembly, motor and vehicle

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