Stator core, motor and automobile

Abstract

This application provides a stator core, a motor, and an automobile, comprising a first lamination group formed by stacking multiple first laminations and a second lamination group formed by stacking multiple second laminations. The inner edges of the annular first laminations and the inner edges of the annular second laminations are provided with multiple spaced and radially distributed stator teeth and stator slots. A second lamination group is connected to each end of the first lamination group, forming the stator core. The area near the annular side edge of the second laminations is provided with multiple sets of spaced first and second sets of oil guide holes. The multiple oil outlets of the first lamination group form multiple main oil supply channels, and the deflected and superimposed first and second sets of oil guide holes of the second lamination group form multiple first and second oil injection channels, thereby optimizing the motor cooling system structure, improving oil guiding efficiency, and meeting the heat dissipation requirements of high-power motors.

Description

Technical Field

[0001] This application relates to motor cooling technology, specifically to a stator core, a motor, and an automobile. Background Technology

[0002] With the rapid development of new energy vehicles, electric drive systems are evolving towards higher power density, higher efficiency, and higher integration. However, high-power-density motors face severe heat dissipation challenges under compact designs, and internal heat accumulation can easily lead to winding overheating, rotor demagnetization, and other faults. The traditional stator cooling system using an oil guide ring structure suffers from problems such as complex cooling system structure, numerous components, and low oil guiding efficiency, resulting in excessively high local temperature rise and affecting motor reliability and lifespan. Therefore, it is urgent to optimize the cooling oil channel structure of the stator and its oil guide ring to improve the cooling system structure, enhance cooling uniformity, and meet the heat dissipation requirements of high-power motors. Utility Model Content

[0003] This application provides a stator core, a motor, and an automobile. Multiple oil injection channels are formed by the deflection and superposition of laminations at both ends of the stator core, which optimizes the stator cooling oil channel structure, improves oil guiding efficiency, and meets the heat dissipation requirements of high-power motors.

[0004] This application provides a stator core, including a first lamination group formed by stacking multiple first laminations and a second lamination group formed by stacking multiple second laminations. The inner edge of the annular first lamination and the inner edge of the annular second lamination are provided with multiple stator teeth arranged at intervals. A stator slot is provided between two adjacent stator teeth. The two ends of the first lamination group are respectively connected to a second lamination group, and thus form the stator core.

[0005] The second lamination has multiple sets of spaced-apart first and second sets of oil guide holes in the area near the annular side edge;

[0006] The first set of oil guide holes includes a first notch extending radially inward from the annular side edge and a plurality of first oil guide ports spaced apart. The first notch and the plurality of first oil guide ports are respectively provided corresponding to one of the stator slots or the stator teeth, and the radial distance of the plurality of first oil guide ports in any set of the first set of oil guide holes from the center gradually decreases.

[0007] The second set of oil guide holes includes a second notch extending radially inward from the annular side edge and a plurality of second oil guide ports spaced apart. The second notch and the plurality of second oil guide ports are respectively provided corresponding to one of the stator slots or the stator teeth, and the radial distance of the plurality of second oil guide ports from the center in any set of the second set of oil guide holes gradually decreases.

[0008] Along the radial direction of the second lamination, the first set of oil guide holes is closer to the outer edge of the second lamination than the second set of oil guide holes.

[0009] In one embodiment, the outer circumference of the first lamination is provided with multiple sets of oil inlet notches, and the oil inlet notches are provided corresponding to one of the stator slots or stator teeth; multiple layers of the first laminations are stacked and the multiple oil inlet notches are connected to form a main oil supply channel, which is used to introduce cooling oil.

[0010] In one embodiment, a set of oil inlet gaps includes a first oil inlet and a second oil inlet, wherein the first oil inlet is correspondingly disposed to the first gap, and the second oil inlet is correspondingly disposed to the second gap.

[0011] In one embodiment, the multilayer second lamination is offset and deflected along the stacking direction;

[0012] Along the stacking direction, multiple layers of the second stampings with first notches and multiple first oil guide ports are partially stacked in a staggered manner to form a first oil injection channel, and multiple layers of the second stampings with second notches and multiple second oil guide ports are partially stacked in a staggered manner to form a second oil injection channel.

[0013] In one embodiment, the first fuel injection passage has a first tilt angle, and the second fuel injection passage has a second tilt angle, wherein the first tilt angle is different from the second tilt angle.

[0014] In one embodiment, the second lamination group includes group A connected to the first lamination group and groups B, C and D connected axially in sequence; the lamination thickness of group A is greater than or equal to the lamination thickness of group B, the lamination thickness of group C and the lamination thickness of group D.

[0015] In one embodiment, within each of the groups A, B, C, and D, the projections of the first group of oil guide holes and the second group of oil guide holes on a plurality of second laminations overlap along the stacking direction.

[0016] In one embodiment, the groups A, B, C, and D are offset and staggered along the stacking direction; the plurality of first oil guide ports on the second laminations in the groups A, B, C, and D respectively include at least a second hole, a third hole, and a fourth hole; the plurality of second oil guide ports on the second laminations in the groups A, B, C, and D respectively include at least a B hole, a C hole, and a D hole.

[0017] Along the stacking direction, the first notch of group A is misaligned and overlaps with the second hole of group B, the second hole of group B is misaligned and overlaps with the third hole of group C, and the third hole of group C is misaligned and overlaps with the fourth hole of group D;

[0018] Along the stacking direction, the second notch of group A is misaligned and overlaps with the B hole of group B, the B hole of group B is misaligned and overlaps with the C hole of group C, and the C hole of group C is misaligned and overlaps with the D hole of group D.

[0019] This application also provides an electric motor, which includes the above-described stator core.

[0020] This application also provides an automobile that includes the above-described electric motor.

[0021] The beneficial effects of adopting the above technical solution are:

[0022] This application provides a stator core, a motor, and an automobile, comprising a first lamination group formed by stacking multiple first laminations and a second lamination group formed by stacking multiple second laminations. The annular side edge of the second lamination group is provided with multiple sets of first and second sets of oil guide holes, which are spaced apart on the second laminations. This fully utilizes the spatial structure of the annular side edge of the second laminations, not only reducing the weight of the stator core but also providing conditions for forming cooling oil channels. This has the potential to optimize the cooling system structure, improve oil guiding efficiency, and meet the heat dissipation requirements of high-power motors. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the stator core of Embodiment 1 provided in this application.

[0025] Figure 2 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 1 provided in this application.

[0026] Figure 3 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 1 provided in this application.

[0027] Figure 4 A cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 1 provided in this application.

[0028] Figure 5a for Figure 4 A magnified view of a portion of region A shown.

[0029] Figure 5b for Figure 4 A magnified view of a portion of region B shown.

[0030] Figure 6 A cross-sectional schematic diagram of the second oil injection channel of the stator core in Embodiment 1 provided in this application.

[0031] Figure 7a for Figure 6 A magnified view of a portion of region C shown.

[0032] Figure 7b for Figure 6 A magnified view of a portion of region D shown.

[0033] Figure 8 A schematic diagram of the stator core of Embodiment 2 provided in this application.

[0034] Figure 9 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 2 provided in this application.

[0035] Figure 10 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 2 provided in this application.

[0036] Figure 11 A cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 2 provided in this application.

[0037] Figure 12 for Figure 11 A magnified view of a portion of region E shown.

[0038] Figure 13 A schematic diagram of the stator core of Embodiment 3 provided in this application.

[0039] Figure 14 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 3 provided in this application.

[0040] Figure 15 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 3 provided in this application.

[0041] Figure 16 A cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 3 provided in this application.

[0042] Figure 17 for Figure 16 A magnified view of a portion of region F shown.

[0043] Figure 18 A schematic diagram of the stator core of Embodiment 4 provided in this application.

[0044] Figure 19This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 4 provided in this application.

[0045] Figure 20 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 4 provided in this application.

[0046] Figure 21 A cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 4 provided in this application.

[0047] Figure 22 for Figure 21 A magnified view of a portion of region G shown.

[0048] Figure 23 A cross-sectional schematic diagram of the second oil injection channel of the stator core in Embodiment 4 provided in this application.

[0049] Figure 24 for Figure 23 A magnified view of a portion of region H shown.

[0050] Figure 25 A schematic diagram of the stator core of Embodiment 5 provided in this application.

[0051] Figure 26 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 5 provided in this application.

[0052] Figure 27 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 5 provided in this application.

[0053] Figure 28 A cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 5 provided in this application.

[0054] Figure 29 for Figure 28 A magnified view of a portion of region I shown.

[0055] Figure 30 A cross-sectional schematic diagram of the second oil injection channel of the stator core in Embodiment 5 provided in this application.

[0056] Figure 31 for Figure 30 A magnified view of a portion of region J shown.

[0057] Figure label:

[0058] 100 - Stator core;

[0059] 10 - First film processing;

[0060] 11-First film processing group;

[0061] 12-Oil inlet notch; 121-First oil inlet; 122-Second oil inlet; 13-Main oil supply channel;

[0062] 20 - Second film;

[0063] 21-Second stencil group; 211-Group A; 212-Group B; 213-Group C; 214-Group D; 215-Group E; 216-Group F;

[0064] 22-First set of oil guide holes; 221-First notch; 222-First oil guide port; 2222-Second hole; 2223-Third hole; 2224-Fourth hole; 2225-Fifth hole; 2226-Sixth hole;

[0065] 23-Second group of oil guide holes; 231-Second notch; 232-Second oil guide port; 2322-Hole B, 2323-Hole C; 2324-Hole D;

[0066] 24-First fuel injection passage; 241-First tilt angle;

[0067] 25 - Second fuel injection passage; 251 - Second tilt angle;

[0068] 30-Stator teeth;

[0069] 40 - Stator slot. Detailed Implementation

[0070] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0071] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0072] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0073] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0074] To address the problems of complex cooling systems, numerous components, and low oil guiding efficiency in current automotive motor stators, this application provides a stator core 100. Figure 1 This is a schematic diagram of the stator core structure of Embodiment 1 provided in this application. Figure 2 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 1 provided in this application, as shown below. Figure 1 and Figure 2 As shown, the stator core 100 includes a first lamination group 11 formed by stacking multiple first laminations 10 and a second lamination group 21 formed by stacking multiple second laminations 20. The inner edges of the annular first laminations 10 and the inner edges of the annular second laminations 20 are provided with multiple stator teeth 30 spaced apart. A stator slot 40 is provided between two adjacent stator teeth 30. The two ends of the first lamination group 11 are respectively connected to a second lamination group 21, forming the stator core 100.

[0075] The second punch 20 has multiple sets of spaced first set of oil guide holes 22 and second set of oil guide holes 23 in the area near the annular side edge.

[0076] like Figure 3 As shown, the first group of oil guide holes 22 includes a first notch 221 extending radially inward from the annular side edge and a plurality of first oil guide ports 222 spaced apart. The first notch 221 and the plurality of first oil guide ports 222 are respectively provided corresponding to one of the stator slots 40, and the radial distance of the plurality of first oil guide ports 222 from the center in any group of the first group of oil guide holes 22 gradually decreases.

[0077] The second set of oil guide holes 23 includes a second notch 231 extending radially inward from the annular side edge and a plurality of second oil guide ports 232 spaced apart. The second notch 231 and the plurality of second oil guide ports 232 are respectively provided corresponding to one of the stator teeth 30 or the stator groove 40, and the radial distance of the plurality of second oil guide ports 232 in any set of the second set of oil guide holes 23 from the center gradually decreases.

[0078] Along the radial direction of the second lamination 20, the first set of oil guide holes 22 is closer to the outer edge of the second lamination 20 than the second set of oil guide holes 23.

[0079] The stator core 100 provided in this application is formed by stacking and connecting annular first laminations 10 and second laminations 20. The inner rings of the first laminations 10 and second laminations 20 are provided with a plurality of stator slots 40 that are evenly distributed and radially extended. The two ends of the multi-layered first lamination group 11 are connected to the multi-layered second lamination group 21, forming a composite structure stator core 100. At the same time, the annular side edge of the second lamination group 21 is provided with a plurality of first oil guide holes 22 and second oil guide holes 23, so that cooling oil channels can be formed in the first lamination group 11 and the second lamination group 21 that make up the stator core 100, thereby laying the foundation for simplifying the cooling oil channel structure and eliminating the oil guide ring in the current cooling system. Moreover, the first set of oil guide holes 22 and the second set of oil guide holes 23 are distributed at intervals on the second lamination 20, making full use of the space structure of the annular side edge of the second lamination 20. This not only reduces the weight of the stator core 100, but also forms cooling oil channels, which has the potential to optimize the cooling system structure, improve oil guiding efficiency, and meet the heat dissipation requirements of high-power motors.

[0080] To make the technical solution, purpose and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.

[0081] Example 1

[0082] In this embodiment, the first lamination group 11 formed by the stacking of the first laminations 10 is disposed in the middle section of the stator core 100 and is the main body of the stator core 100.

[0083] In some implementations, such as Figure 1 and Figure 2 As shown, in order to make full use of the multi-layer lamination structure of the stator core 100 and to stack and connect them to form a cooling oil channel, multiple sets of oil inlet notches 12 are provided on the outer circumference of the first lamination 10. The oil inlet notches 12 are corresponding to one of the stator slots 40. Moreover, a set of oil inlet notches 12 includes a first oil inlet 121 and a second oil inlet 122. Multiple layers of the first lamination 10 are stacked and multiple oil inlet notches 12 are connected to form a main oil supply channel 13, which is used to introduce cooling oil.

[0084] In this embodiment, please continue to refer to Figure 2 The first lamination 10 is an annular thin sheet structure. The outer ring has multiple stator teeth 30 that protrude radially inward from the annular area. There is a stator slot between two adjacent stator teeth. That is, the inner ring has 54 stator slots 40 that radiate radially outward.

[0085] The outer ring of the first lamination 10 is provided with nine square first oil inlets 121 and second oil inlets 122 evenly spaced in a circumferential direction. The first oil inlets 121 and second oil inlets 122 are respectively aligned with a stator slot 40. The stator slot 40 of the inner ring of each first lamination 10 is aligned with the stator slot 40 of the adjacent first lamination 10. The stacked first laminations 10 extend axially to form a first lamination group 11. The first oil inlets 121 and second oil inlets 122 on the multiple first laminations 10 on the outer ring are connected and extend axially to form a main oil supply channel 13. The main oil supply channel 13 can communicate with the cooling oil channel of the stator housing.

[0086] For example, the thickness of the first lamination 10 can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.6 mm, or other thicknesses. The first lamination 10 can be made of silicon steel or other metal materials. The first oil inlet 121 and the second oil inlet 122 can be square, round, triangular, or other shapes. The number of the first oil inlet 121 and the second oil inlet 122 can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or other quantities. No restrictions are imposed here.

[0087] In the above scheme, the outer edge of the first lamination 10 is provided with nine evenly distributed first oil inlets 121 and second oil inlets 122, and the inner edge of the first lamination 10 is provided with 54 evenly distributed stator slots 40. Each first oil inlet 121 and second oil inlet 122 corresponds to one stator slot 40. This design ensures that when the first oil inlets 121 and second oil inlets 122 on the outer edges of multiple stacked first laminations 10 are aligned, the stator slots 40 on the inner edges of the multiple stacked first laminations 10 will also be aligned. Moreover, the first oil inlets 121 and second oil inlets 122 on the outer edges of multiple stacked first laminations 10 are connected to form the main oil supply channel 13. This design is ingenious, easy to process and form, and has a high cost performance.

[0088] In this embodiment, please refer to the following: Figure 1 and Figure 3 To divert the cooling oil from the main oil supply channel 13 in the middle section of the stator core 100 to both ends of the stator core 100, a second lamination group 21 is connected to each end of the first lamination group 11 in the middle section of the stator core 100. The second lamination group 21 is formed by stacking multiple layers of second laminations 20. The second lamination 20 has an annular thin sheet structure, and the outer diameter and inner diameter of the second lamination 20 are the same as those of the first lamination 10. The inner ring of the second lamination 20 is also provided with the same stator groove 40 and stator teeth 30 as the first lamination 10. Moreover, the area of ​​the second lamination 20 near the annular side edge is provided with multiple sets of spaced first oil guide holes 22 and second oil guide holes 23.

[0089] In some implementations... Figure 3 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 1 provided in this application, as shown below. Figure 3 As shown, the first group of oil guide holes 22 includes a first notch 221 extending radially inward from the annular side edge and a plurality of first oil guide ports 222 spaced apart. The first notch 221 and the plurality of first oil guide ports 222 are respectively provided corresponding to one of the stator slots 40, and the radial distance of the plurality of first oil guide ports 222 from the center in any group of the first group of oil guide holes 22 gradually decreases.

[0090] Specifically, the first notch 221 is a bullet-shaped groove structure that extends radially outward from the side edge of the second lamination 20 to form the outer edge of the second lamination 20.

[0091] The first oil guide port 222 is a circular hole that is adjacent to the first notch 221 and spaced apart. Multiple first oil guide ports 222 extend through the annular side of the second lamination 20. Among them, the first notch 221 is separated from the adjacent first oil guide port 222 by at least one stator slot 40, and there is at least one stator slot 40 between every two first oil guide ports 222.

[0092] Please continue reading. Figure 3 The second group of oil guide holes 23 includes a second notch 231 extending radially inward from the annular side edge and a plurality of second oil guide ports 232 spaced apart. The second notch 231 and the plurality of second oil guide ports 232 are respectively provided corresponding to one of the stator slots 40, and the radial distance of the plurality of second oil guide ports 232 in any group of the second group of oil guide holes 23 from the center gradually decreases.

[0093] Specifically, the second notch 231 is a bullet-shaped groove structure that extends radially outward from the side edge of the second lamination 20 and forms the outer edge of the second lamination 20. Moreover, the second notch 231 is adjacent to the first notch 221, and there is at least one stator slot 40 between the second notch 231 and the first notch 221.

[0094] The second oil guide port 232 is a circular hole that is adjacent to the second notch 231 and spaced apart. Multiple second oil guide ports 232 extend through the annular side of the second lamination 20. Among them, the second notch 231 is separated from the adjacent second oil guide port 232 by at least one stator slot 40, and there is at least one stator slot 40 between every two second oil guide ports 232.

[0095] To fully utilize the annular side edge of the second lamination 20, in some embodiments, please refer to [the relevant documentation]. Figure 3Along the radial direction of the second lamination 20, the first group of oil guide holes 22 is closer to the outer edge of the second lamination 20 than the second group of oil guide holes 23. Understandably, the distance of the first group of oil guide holes 22 from the edge of the second lamination 20 is less than the distance of the second group of oil guide holes 23 from the edge of the second lamination 20; that is, the first group of oil guide holes 22 and the second group of oil guide holes 23 are staggered and distributed on the annular side surface of the second lamination 20.

[0096] In order to enable the first set of oil guide holes 22 and the second set of oil guide holes 23 in the multi-layered second lamination 20 to connect and form a cooling oil spray channel, in some embodiments... Figure 4 This is a cross-sectional structural diagram of the first oil injection channel of the stator core in Embodiment 1 provided in this application. Figure 5a for Figure 4 A magnified view of a portion of region A shown. Figure 5b for Figure 4 A magnified view of a portion of region B shown. Figure 6 This is a cross-sectional schematic diagram of the second oil injection channel of the stator core in Embodiment 1 provided in this application. Figure 7a for Figure 6 A magnified view of a portion of region C shown. Figure 7b for Figure 6 A magnified view of a portion of region D, as shown below. Figures 4 to 7b As shown,

[0097] The multi-layered second lamination 20 is offset and deflected along the stacking direction. Furthermore, along the stacking direction, the first notch 221 and a plurality of first oil guide ports 222 on the multi-layered second lamination 20 are partially offset and stacked to form a first oil injection channel 24, and the second notch 231 and a plurality of second oil guide ports 232 on the multi-layered second lamination 20 are partially offset and stacked to form a second oil injection channel 25.

[0098] Understandably, when the stator slots 40 of multiple stacked second laminations 20 are aligned, and the first notch 221, multiple first oil guide ports 222, second notch 231 and multiple second oil guide ports 232 of adjacent second laminations 20 are aligned respectively, that is, the first notch 221 of adjacent second laminations 20 is aligned with the first notch 221, the first oil guide port 222 is aligned with the first oil guide port 222, the second notch 231 of adjacent second laminations 20 is aligned with the second notch 231, and the second oil guide port 232 is aligned with the second oil guide port 232, then the multiple first notches 221, multiple first oil guide ports 222, second notches 231 and multiple second oil guide ports 232 will be stacked to form a passage, while a passage will not be formed between the first group of oil guide holes 22 and the second group of oil guide holes 23.

[0099] Specifically, when multiple second laminations 20 are aligned with the stator slots 40 of adjacent multiple second laminations 20 and the two are deflected along the stacking direction, a passage can be formed between the first notch 221 and the multiple first oil guide ports 222, and a passage can be formed between the second notch 231 and the multiple second oil guide ports 232.

[0100] Understandably, when the first notch 221 of a second lamination 20 connects with the first oil guide port 222 adjacent to the deflection of the next second lamination 20, and then connects with the next first oil guide port 222 adjacent to the deflection of the third second lamination 20, and the stator slots 40 of the adjacent second laminations 20 are aligned, a passage is formed by connecting the first notch 221 and multiple first oil guide ports 222, thereby forming a cooling oil injection channel structure. Similarly, the second notch 231 and multiple second oil guide ports 232 will also connect to form a passage, thereby forming a cooling oil injection channel structure. That is, through the deflection angle between multiple second laminations 21 and the alignment of the stator slots 40, a first oil injection channel 24 is formed between the first notch 221 and multiple first oil guide ports 222 of the multiple second laminations 20, and a second oil injection channel 25 is formed between the second notch 231 and multiple second oil guide ports 232 of the multiple second laminations 20.

[0101] In some implementations, please refer to [the relevant documentation]. Figures 1 to 7b In order to connect the first fuel injection passage 24, the second fuel injection passage 25 and the main fuel supply passage 13, the first fuel inlet 121 is correspondingly arranged with the first notch 221, and the second fuel inlet 122 is correspondingly arranged with the second notch 231. It can be understood that when the first fuel inlet 121 of the first lamination 10 is aligned with the first notch 221 of the second lamination 20, and the second fuel inlet 122 of the first lamination 10 is aligned with the second notch 231 of the second lamination 20, the main fuel supply passage 13 of the first lamination group 11 and the first fuel injection passage 24 and the second fuel injection passage 25 of the second lamination group 21 can be connected.

[0102] To ensure that the cooling oil is sprayed thoroughly onto different areas at both ends of the stator core 100, thereby achieving comprehensive cooling of the stator coil, some embodiments are described below. Figure 5a , Figure 5b and Figure 7b The first fuel injection passage 24 has a first tilt angle 241, and the second fuel injection passage 25 has a second tilt angle 251. The first tilt angle 241 and the second tilt angle 251 are different.

[0103] Specifically, the first inclination angle 241 formed by the first oil injection channel 24 and the axial direction is smaller than the second inclination angle 251 formed by the second oil injection channel 25 and the axial direction. Understandably, the first oil injection channel 24 can spray cooling oil to a position farther than the second oil injection channel 25. Furthermore, due to the different lengths of the stator coils exposed at both ends of the stator core 100, the spray angles of the first oil injection channel 24 and the second oil injection channel 25 of the multi-layer second laminations 20 located at both ends of the stator core 100 are also different.

[0104] In some implementations, such as Figure 5a , Figure 5b , Figure 7a and Figure 7b As shown, the second lamination group 21 includes group A 211 connected to the first lamination group 11, and groups B 212, C 213, and D 214 connected axially in sequence. The lamination thickness of group A 211 is greater than or equal to the lamination thickness of group B 212, the lamination thickness of group C 213, and the lamination thickness of group D 214, respectively.

[0105] Specifically, the second lamination group 21 is divided into group A 211, group B 212, group C 213, and group D 214. Among them, group A 211 is adjacent to the first lamination group 11 and extends axially to connect group B 212, group C 213, and group D 214 in sequence. Moreover, in order to reduce the flow resistance of cooling oil flowing from the self-supply channel 13 into the first injection channel 24, the thickness of group A 211 is greater than the thickness of the other three groups. That is, the flow length of the first inlet 121 of the self-supply channel 13 into the first opening 221 of the first injection channel 24 is greater than the length of the other three groups. Similarly, the flow length of the second inlet 122 of the self-supply channel 13 into the second opening 231 of the second injection channel 25 is greater than the length of the other three groups.

[0106] In this embodiment, the thickness of the second lamination 20 is 0.2 mm, the thickness of group A 211 is 2 mm, and the thicknesses of groups B 212, C 213, and D 214 are each 1 mm. That is, group A 211 consists of 10 stacked second laminations 20, and groups B 212, C 213, and D 214 each consist of 5 stacked second laminations 20. Understandably, the flow length of the cooling oil in group A 211 is longer than the flow lengths of groups B 212, C 213, and D 214.

[0107] To ensure the unobstructed flow of the first fuel injection channel 24 and the second fuel injection channel 25, the projections of the first group of oil guide holes 22 and the second group of oil guide holes 23 on the multiple second stampings 20 in each of the groups A 211, B 212, C 213 and D 214 overlap along the stacking direction.

[0108] Understandably, the first group of oil guide ports and the second group of oil guide holes 23 of the multi-layered second laminations 20 of Group A 211, Group B 212, Group C 213, and Group D 214 can form the first injection channel 24 and the second injection channel 25 through deflection and overlap. However, the first notch 221 and multiple first oil guide ports 222 in the first group of oil guide ports do not form a confluence area during deflection and overlap, thus the first injection channel 24 cannot be formed. Similarly, the second notch 231 and multiple second oil guide ports 23 in the second group of oil guide holes do not form a confluence area during deflection and overlap, thus the second injection channel 25 cannot be formed. Therefore, the projections of the first group of oil guide holes 22 and the second group of oil guide holes 23 along the lamination direction must overlap and intersect, and cannot be separated.

[0109] In some implementations, please refer to [the relevant documentation]. Figure 2 , Figure 3 , Figure 5a and Figure 5b The plurality of first oil guide ports 222 on the second laminations 20 in Group A 211, Group B 212, Group C 213, and Group D 214 respectively include at least a second hole 2222, a third hole 2223, and a fourth hole 2224. The plurality of second oil guide ports 232 on the second laminations 20 in Group A 211, Group B 212, Group C 213, and Group D 214 respectively include at least a B hole 2322, a C hole 2323, and a D hole 2324.

[0110] Specifically, in this embodiment, the second lamination group 21 is divided into 4 groups. Correspondingly, the first group of oil guide holes 22 includes a first notch 221, a second hole 2222, a third hole 2223 and a fourth hole 2224, and the second group of oil guide holes 23 includes a second notch 231, a B hole 2322, a C hole 2323 and a D hole 2324. Moreover, the second hole 2222, the third hole 2223 and the fourth hole 2224 are all round holes, and the B hole 2322, the C hole 2323 and the D hole 2324 are all round holes.

[0111] In order for the first set of oil guide holes 22 and the second set of oil guide holes 23 of Group A 211, Group B 212, Group C 213 and Group D 214 to be connected to form an injection channel, Group A 211, Group B 212, Group C 213 and Group D 214 are offset and staggered along the stacking direction. Moreover, along the stacking direction, the first notch 221 of Group A 211 is offset and overlaps with the second hole 2222 of Group B 212, the second hole 2222 of Group B 212 is offset and overlaps with the third hole 2223 of Group C 213, and the third hole 2223 of Group C 213 is offset and overlaps with the fourth hole 2224 of Group D 214. Similarly, along the stacking direction, the second notch 231 of group A 211 is misaligned and overlaps with the B hole 2322 of group B 212, the B hole 2322 of group B 212 is misaligned and overlaps with the C hole 2323 of group C 213, and the C hole 2323 of group C 213 is misaligned and overlaps with the D hole 2324 of group D 214.

[0112] Specifically, in this embodiment, the first notch 221 and the second hole 2222 in the first group of oil guide holes 22 are separated by two stator slots 40, the second hole 2222 and the third hole 2223 are separated by one stator slot 40, and the third hole 2223 and the fourth hole 2224 are separated by one stator slot 40. Therefore, firstly, the first notch 221 of the first group of oil guide holes 22 in group A 211 is aligned with the first oil inlet 121 of the first lamination group 11 and the two are overlapped. Then, group B 212 is deflected by two stator slots 40 and its second hole 2222 is aligned with the first notch 221 of group A 211 and the two are overlapped. Then, group C 213 is deflected by one stator slot 40 and its third hole 2223 is aligned with the second hole 2222 of group B 212 and the two are overlapped. Finally, group D 214 is deflected by one stator slot 40 and its fourth hole 2224 is aligned with the third hole 2223 of group C 213 and the two are overlapped. Understandably, the first notch 221 of group A 211, the second hole 2222 of group B 212 (which overlaps with the deflection), the third hole 2223 of group C 213, and the fourth hole 2224 of group D 214 form the first oil injection channel 24. The first oil injection channel 24 is connected to the first oil inlet 121 of the main oil supply channel 13 and is used to transport cooling oil to cool the stator core 100 and the stator coils at both ends of the stator core 100.

[0113] Similarly, first, align the second notch 231 of the second group of oil guide holes 23 of group A 211 with the second oil inlet 122 of the first lamination group 11 and make them overlap. Then, deflect group B 212 by two stator slots 40 and align its B hole 2322 with the second notch 231 of group A 211 and make them overlap. Then, deflect group C 213 by one stator slot 40 and align its C hole 2323 with the B hole 2322 of group B 212 and make them overlap. Then, deflect group D 214 by one stator slot 40 and align its D hole 2324 with the C hole 2323 of group C 213 and make them overlap. Understandably, the second notch 231 of group A 211, together with the B hole 2322 of group B 212, the C hole 2323 of group C 213 and the D hole 2324 of group D 214, which are deflected and overlapped, form the second oil injection channel 25. The second oil injection channel 25 is connected to the second oil inlet 122 of the main oil supply channel 13, and is used to transport cooling oil to cool the stator core 100 and the stator coils at both ends of the stator core.

[0114] In this embodiment, the thickness of the second lamination 20 is 0.2 mm, but it can also be 0.1 mm, 0.15 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.6 mm, or other thicknesses. The second lamination 20 is made of silicon steel, but it can also be made of other metal materials. The first oil guide port 222 and the second oil guide port 232 are square, but they can also be round, triangular, or other shapes. There are 9 of each of the first oil guide ports 222 and the second oil guide ports 232, but they can also be 2, 3, 4, 5, 6, 7, 8, 10, 11, or other numbers. The first lamination group 11 and the second lamination group 21 can be divided into 1 group, 2 groups, 3 groups, 4 groups, 5 groups, 6 groups, or other numbers of groups. There are no restrictions on the above.

[0115] Example 2

[0116] In this embodiment, Figure 8 This is a schematic diagram of the stator core structure of Embodiment 2 provided in this application. Figure 9 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 2 provided in this application, as shown below. Figure 8 and Figure 9 As shown, the stator slots 40 of the first lamination 10 and the second lamination 20 are 72 in total.

[0117] The outer ring of the first lamination 10 is provided with 18 square first oil inlets 121 evenly spaced in the circumference. Each first oil inlet 121 is correspondingly arranged with a stator tooth 30. The first lamination group 11, formed by stacking multiple first laminations 10, is located in the middle section of the stator core 100. Understandably, the first lamination group 11 forms 18 main oil supply channels 13 in the circumference.

[0118] Figure 10This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 2 provided in this application, as shown below. Figures 8-10 As shown, the second lamination 20 has 18 sets of spaced-apart first-group oil guide holes 22 near its annular side edge. A second lamination group 21, formed by stacking multiple second laminations 20, is located at both ends of the first lamination group 11. The first-group oil guide holes 22 include a first notch 221, a second hole 2222, a third hole 2223, and a fourth hole 2224 spaced apart, and each of these holes corresponds to a stator tooth 30.

[0119] Figure 11 This is a cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 2 provided in this application. Figure 12 for Figure 11 A magnified view of a portion of region E shown, as follows: Figure 11 and Figure 12 As shown, the second lamination group 21 is divided into group A 211, group B 212, group C 213, and group D 214. Among them, group A 211 is adjacent to the first lamination group 11, and groups B 212, C 213, and D 214 are connected sequentially along the axial direction. Moreover, groups A 211, B 212, C 213, and D 214 are offset and staggered along the stacking direction to form the first fuel injection channel 24 according to the method of embodiment 1.

[0120] For details, please continue reading Figures 8-12 First, align the first notch 221 of the first group of oil guide holes 22 of group A 211 with the first oil inlet 121 of the first lamination group 11 and make them overlap. Then, deflect group B 212 by one stator slot 40 and align its second hole 2222 with the first notch 221 of group A 211 and make them overlap. Next, deflect group C 213 by one stator slot 40 and align its third hole 2223 with the second hole 2222 of group B 212 and make them overlap. Then, deflect group D 214 by one stator slot 40 and align its fourth hole 2224 with the third hole 2223 of group C 213 and make them overlap. Understandably, the first notch 221 of group A 211, the deflected and overlapped second hole 2222 of group B 212, the third hole 2223 of group C 213, and the fourth hole 2224 of group D 214 form the first fuel injection channel 24, and the first fuel injection channel 24 is connected to the main fuel supply channel 13.

[0121] Understandably, in this embodiment, the annular area of ​​the second stamping group 21 forms 18 first oil injection channels 24, which are connected to the 18 main oil supply channels 13 of the first stamping group 11 and transport cooling oil.

[0122] The differences between Embodiment 2 and Embodiment 1 are as follows: The first lamination 10 of Embodiment 2 has one set of 18 first oil inlets 121, while the first lamination 10 of Embodiment 1 has two sets of 9 first oil inlets 121 and a second oil inlet 122. The second lamination 20 of Embodiment 2 has 18 sets of first oil guide holes 22, while the second lamination 20 of Embodiment 1 has 9 sets of first oil guide holes 22 and a second set of oil guide holes 23.

[0123] For any parts not described in Example 2, please refer to the parts already described in Example 1.

[0124] Example 3

[0125] In this embodiment, Figure 13 This is a schematic diagram of the stator core structure of Embodiment 3 provided in this application. Figure 14 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 3 provided in this application, as shown below. Figure 13 and Figure 14 As shown, the stator slots 40 of the first lamination 10 and the second lamination 20 are 72 in total.

[0126] The outer ring of the first lamination 10 is provided with 12 square first oil inlets 121 evenly spaced in the circumference. Each first oil inlet 121 is correspondingly arranged with a stator tooth 30. The first lamination group 11, formed by stacking multiple first laminations 10, is located in the middle section of the stator core 100. Understandably, the first lamination group 11 forms 12 main oil supply channels 13 in the circumference.

[0127] Figure 15 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 3 provided in this application, as shown below. Figures 13-15 As shown, the second lamination 20 has 12 sets of spaced first group oil guide holes 22 near the annular side edge, and a second lamination group 21 formed by stacking multiple second laminations 20 is disposed at both ends of the first lamination group 11. The first group of oil guide holes 22 includes a first notch 221, a second hole 2222, a third hole 2223, a fourth hole 2224, a fifth hole 2225, and a sixth hole 2226 spaced apart, and each of these holes corresponds to a stator tooth 30.

[0128] Figure 16 This is a cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 3 provided in this application. Figure 17 for Figure 16 A magnified view of a portion of region F shown, as follows: Figure 16 and Figure 17As shown, the second lamination group 21 is divided into group A 211, group B 212, group C 213, group D 214, group E 215, and group F 216. Among them, group A 211 is adjacent to the first lamination group 11 and extends axially to connect group B 212, group C 213, group D 214, group E 215, and group F 216 in sequence. Moreover, group A 211, group B 212, group C 213, group D 214, group E 215, and group F 216 are offset and staggered along the stacking direction to form the first oil injection channel 24 according to the method of embodiment 1.

[0129] For details, please continue reading Figures 13-17 First, align the first notch 221 of the first group of oil guide holes 22 of group A 211 with the first oil inlet 121 of the first lamination group 11 and make them overlap. Then, deflect group B 212 by one stator slot 40 and align its second hole 2222 with the first notch 221 of group A 211 and make them overlap. Next, deflect group C 213 by one stator slot 40 and align its third hole 2223 with the second hole 2222 of group B 212 and make them overlap. Then, deflect group D 214 by one stator slot 40 and align its fourth hole 2224 with the third hole 2223 of group C 213 and make them overlap. Next, deflect group E 215 by one stator slot 40 and align its fifth hole 2225 with the fourth hole 2224 of group D 214 and make them overlap. Finally, deflect group F 216 by one stator slot 40 and align its sixth hole 2226 with the fifth hole 2225 of group E 215 and make them overlap.

[0130] Understandably, the first notch 221 of group A 211, the second hole 2222 of group B 212, the third hole 2223 of group C 213, the fourth hole 2224 of group D 214, the fifth hole 2225 of group E 215, and the sixth hole 2226 of group F 216, which are deflected and overlapped, form the first fuel injection channel 24, and the first fuel injection channel 24 is connected to the main fuel supply channel 13.

[0131] Understandably, in this embodiment, the annular region of the second lamination group 21 forms 12 first oil injection channels 24, which are connected to the 12 main oil supply channels 13 of the first lamination group 11 and deliver cooling oil.

[0132] The differences between Embodiment 3 and Embodiment 1 include: Embodiment 3's first lamination 10 has one set of 12 first oil inlets 121, while Embodiment 1's first lamination 10 has two sets of 9 first oil inlets 121 and a second oil inlet 122. Embodiment 3's second lamination 20 has 12 sets of first oil guide holes 22, while Embodiment 1's second lamination 20 has 9 sets of first oil guide holes 22 and a second set of oil guide holes 23. Embodiment 3's second lamination 20 has 6 first oil guide holes 22 and 6 sets of second lamination groups 21, while Embodiment 1's second lamination 20 has 4 first oil guide holes 22 and 4 second oil guide holes 23, and 4 sets of second lamination groups 21.

[0133] For any parts not described in Example 3, please refer to the parts already described in Example 1.

[0134] Example 4

[0135] In this embodiment, Figure 18 This is a schematic diagram of the stator core structure of Embodiment 4 provided in this application. Figure 19 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 4 provided in this application, as shown below. Figure 18 and Figure 19 As shown, the stator slots 40 of the first lamination 10 and the second lamination 20 are 72 in total.

[0136] The outer ring of the first lamination 10 is provided with 12 square first oil inlets 121 and second oil inlets 122 evenly spaced in the circumferential direction. The first oil inlets 121 and second oil inlets 122 are respectively arranged corresponding to one stator tooth 30. The first lamination group 11 formed by stacking multiple first laminations 10 is arranged in the middle section of the stator core 100. Understandably, the first lamination group 11 forms 24 main oil supply channels 13 in the circumferential direction.

[0137] Figure 20 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 4 provided in this application, as shown below. Figures 18-20 As shown, the second lamination 20 has 12 sets of spaced-apart first-group oil guide holes 22 and second-group oil guide holes 23 near its annular side edge. A second lamination group 21, formed by stacking multiple second laminations 20, is located at both ends of the first lamination group 11. The first-group oil guide holes 22 include a first notch 221, a second hole 2222, a third hole 2223, and a fourth hole 2224 spaced apart, with each notch corresponding to a stator tooth 30. The second-group oil guide holes 23 include a second notch 231, a B hole 2322, a C hole 2323, and a D hole 2324 spaced apart, with each notch corresponding to a stator tooth 30.

[0138] Figure 21 This is a cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 4 provided in this application. Figure 22 for Figure 21 A magnified view of a portion of region G shown. Figure 23 This is a cross-sectional schematic diagram of the second oil injection channel of the stator core in Embodiment 4 provided in this application. Figure 24 for Figure 23 A magnified view of a portion of region H is shown below. Figures 21-24 As shown, the second lamination group 21 is divided into group A 211, group B 212, group C 213, and group D 214. Among them, group A 211 is adjacent to the first lamination group 11, and groups B 212, C 213, and D 214 are connected sequentially along the axial direction. Moreover, groups A 211, B 212, C 213, and D 214 are offset and staggered along the stacking direction to form the first fuel injection channel 24 and the second fuel injection channel 25 according to the method of embodiment 1.

[0139] For details, please continue reading Figures 18-24 The first notch 221 of the first group of oil guide holes 22 of group A 211 is aligned with the first oil inlet 121 of the first lamination group 11 and the two overlap. Group B 212 is deflected by two stator slots 40 and its second hole 2222 is aligned with the first notch 221 of group A 211 and the two overlap. Group C 213 is deflected by one stator slot 40 and its third hole 2223 is aligned with the second hole 2222 of group B 212 and the two overlap. Group D 214 is deflected by one stator slot 40 and its fourth hole 2224 is aligned with the third hole 2223 of group C 213 and the two overlap. It can be understood that the first notch 221 of group A 211, the deflected and overlapped second hole 2222 of group B 212, the third hole 2223 of group C 213, and the fourth hole 2224 of group D 214 form the first oil injection channel 24, and the first oil injection channel 24 is connected to the main oil supply channel 13.

[0140] Similarly, the second notch 231 of the second group of oil guide holes 23 of group A 211 is aligned with the second oil inlet 122 of the first stamping group 11 and the two overlap. Group B 212 is deflected by two stator slots 40 and its B hole 2322 is aligned with the second notch 231 of group A 211 and the two overlap. Group C 213 is deflected by one stator slot 40 and its C hole 2323 is aligned with the B hole 2322 of group B 212 and the two overlap. Group D 214 is then deflected by one stator slot 40 and its D hole 2324 is aligned with the C hole 2323 of group C 213 and the two overlap. Understandably, the second notch 231 of group A 211, together with the deflected and overlapped B hole 2322 of group B 212, C hole 2323 of group C 213, and D hole 2324 of group D 214, forms the second oil injection channel 25.

[0141] Understandably, in this embodiment, the annular region of the second lamination group 21 forms 12 first oil injection channels 24 and 12 second oil injection channels 25. The 12 first oil injection channels 24 and the 12 second oil injection channels 25 are respectively connected to the 24 main oil supply channels 13 of the first lamination group 11 and transport cooling oil.

[0142] The differences between Embodiment 4 and Embodiment 1 are as follows: The first lamination 10 of Embodiment 4 has two sets of 12 first oil inlets 121 and second oil inlets 122, while the first lamination 10 of Embodiment 1 has two sets of 9 first oil inlets 121 and second oil inlets 122. The second lamination 20 of Embodiment 4 has 12 sets of first oil guide holes 22 and second oil guide holes 23, while the second lamination 20 of Embodiment 1 has 9 sets of first oil guide holes 22 and second oil guide holes 23.

[0143] For any parts not described in Example 4, please refer to the parts already described in Example 1.

[0144] Example 5

[0145] In this embodiment, Figure 25 This is a schematic diagram of the stator core structure of Embodiment 5 provided in this application. Figure 26 This is a schematic diagram of the structure of the first lamination of the stator core in Embodiment 5 provided in this application, as shown below. Figure 25 and Figure 26 As shown, the stator slots 40 of the first lamination 10 and the second lamination 20 are 72 in total.

[0146] The outer ring of the first lamination 10 is provided with 24 square first oil inlets 121 evenly distributed in a circumferential direction. Each first oil inlet 121 is correspondingly arranged with a stator tooth 30. The first lamination group 11, formed by stacking multiple first laminations 10, is located in the middle section of the stator core 100. Understandably, the first lamination group 11 forms 24 main oil supply channels 13 in a circumferential direction.

[0147] Figure 27 This is a schematic diagram of the structure of the second lamination of the stator core in Embodiment 5 provided in this application, as shown below. Figures 25-27As shown, the second lamination 20 has 12 sets of spaced-apart first-group oil guide holes 22 and second-group oil guide holes 23 near its annular side edge. A second lamination group 21, formed by stacking multiple second laminations 20, is located at both ends of the first lamination group 11. The first-group oil guide holes 22 include a first notch 221, a second hole 2222, a third hole 2223, and a fourth hole 2224 spaced apart, with each notch corresponding to a stator tooth 30. The second-group oil guide holes 23 include a second notch 231, a B hole 2322, a C hole 2323, and a D hole 2324 spaced apart, with each notch corresponding to a stator tooth 30.

[0148] Figure 28 This is a cross-sectional schematic diagram of the first oil injection channel of the stator core in Embodiment 5 provided in this application. Figure 29 for Figure 28 A magnified view of a portion of region I shown. Figure 30 This is a cross-sectional schematic diagram of the second oil injection channel of the stator core in Embodiment 5 provided in this application. Figure 31 for Figure 30 A magnified view of a portion of region J is shown below. Figures 28-31 As shown, the second lamination group 21 is divided into group A 211, group B 212, group C 213, and group D 214. Among them, group A 211 is adjacent to the first lamination group 11, and groups B 212, C 213, and D 214 are connected sequentially along the axial direction. Moreover, groups A 211, B 212, C 213, and D 214 are offset and staggered along the stacking direction to form the first fuel injection channel 24 and the second fuel injection channel 25 according to the method of embodiment 1.

[0149] For details, please continue reading Figures 25-31 The first notch 221 of the first group of oil guide holes 22 of group A 211 is aligned with the first oil inlet 121 of the first lamination group 11 and the two overlap. Group B 212 is deflected by one stator slot 40 and its second hole 2222 is aligned with the first notch 221 of group A 211 and the two overlap. Group C 213 is deflected by one stator slot 40 and its third hole 2223 is aligned with the second hole 2222 of group B 212 and the two overlap. Group D 214 is then deflected by three stator slots 40 and its fourth hole 2224 is aligned with the third hole 2223 of group C 213 and the two overlap. It can be understood that the first notch 221 of group A 211, the deflected and overlapped second hole 2222 of group B 212, the third hole 2223 of group C 213, and the fourth hole 2224 of group D 214 form the first oil injection channel 24, and the first oil injection channel 24 is connected to the main oil supply channel 13.

[0150] Similarly, the second notch 231 of the second group of oil guide holes 23 of group A 211 is aligned with the second oil inlet 122 of the first stamping group 11 and the two overlap. Group B 212 is deflected by one stator slot 40 and its B hole 2322 is aligned with the second notch 231 of group A 211 and the two overlap. Group C 213 is deflected by one stator slot 40 and its C hole 2323 is aligned with the B hole 2322 of group B 212 and the two overlap. Group D 214 is then deflected by three stator slots 40 and its D hole 2324 is aligned with the C hole 2323 of group C 213 and the two overlap. Understandably, the second notch 231 of group A 211, together with the deflected and overlapped B hole 2322 of group B 212, C hole 2323 of group C 213, and D hole 2324 of group D 214, forms the second oil injection channel 25.

[0151] Understandably, in this embodiment, the annular region of the second lamination group 21 forms 12 first oil injection channels 24 and 12 second oil injection channels 25. The 12 first oil injection channels 24 and the 12 second oil injection channels 25 are respectively connected to the 24 main oil supply channels 13 of the first lamination group 11 and transport cooling oil.

[0152] The differences between Embodiment 5 and Embodiment 1 are as follows: The first lamination 10 of Embodiment 5 has one set of 24 first oil inlets 121, while the first lamination 10 of Embodiment 1 has two sets of 9 first oil inlets 121 and a second oil inlet 122. The second lamination 20 of Embodiment 5 has 12 sets of first oil guide holes 22 and second oil guide holes 23, while the second lamination 20 of Embodiment 1 has 9 sets of first oil guide holes 22 and second oil guide holes 23.

[0153] For any parts not described in Example 5, please refer to the parts already described in Example 1.

[0154] In other embodiments, the stator core 100 may include a first lamination group 11, a second lamination group 21, a third lamination group, or other combinations of laminations. The stator slots 40 may be 54 slots, 63 slots, 72 slots, 81 slots, or any other number of slots. The lamination group located in the middle section of the stator core 100 may include a first oil outlet, a second oil outlet, a third oil outlet, or any other number of oil outlets. The lamination groups located at both ends of the stator core 100 may have any number of oil guide holes, which may be arbitrarily distributed and capable of deflection and overlap. The number and thickness of the lamination groups located at both ends of the stator core 100 are arbitrary and not limited herein.

[0155] The stator core 100 of this application forms multiple main oil supply channels 13 through multiple oil outlets provided by the first lamination group 11 located in the middle section of the stator core 100. Multiple first oil spray channels 24 and second oil spray channels 25 are formed by the deflection and superposition of the second lamination groups 21 located at both ends of the stator core. Cooling oil is transported to the multiple main oil supply channels 13 and the multiple connected first oil spray channels 24 and second oil spray channels 25 through the cooling oil channels of the stator housing, thereby cooling the stator core 100 and different parts of the stator coil at both ends. This design scheme eliminates the need for oil guide rings, optimizes the stator cooling oil channel structure, optimizes the motor cooling system structure, improves oil guiding efficiency, and meets the heat dissipation requirements of high-power motors.

[0156] This application also provides an electric motor, the electric motor including the above-described stator core 100.

[0157] This application also provides a vehicle, which includes the above-described motor. It is understood that the structure of the stator core 100 of this application, as well as the structure of its main oil supply channel 13 and secondary oil injection channels, includes, but is not limited to, a first lamination group 11 formed by stacking multiple first laminations 10 and a second lamination group 21 formed by stacking multiple second laminations 20, wherein the second laminations 20 have multiple sets of spaced first oil guide holes 22 and second oil guide holes 23 near their annular side edges, and the multiple second laminations 20 are deflected and misaligned along the stacking direction to form secondary oil injection channels, etc. All of these technical solutions can be applied to the structure of motors and automobiles, and are not limited here.

[0158] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A stator core characterized by, It includes a first lamination group formed by stacking multiple first laminations and a second lamination group formed by stacking multiple second laminations. The inner edge of the annular first lamination and the inner edge of the annular second lamination are provided with multiple stator teeth that are spaced apart. A stator slot is provided between two adjacent stator teeth. The two ends of the first lamination group are respectively connected to a second lamination group and form the stator core. The second lamination has multiple sets of spaced-apart first and second sets of oil guide holes in the area near the annular side edge; The first set of oil guide holes includes a first notch extending radially inward from the annular side edge and a plurality of first oil guide ports spaced apart. The first notch and the plurality of first oil guide ports are respectively provided corresponding to one of the stator slots or the stator teeth, and the radial distance of the plurality of first oil guide ports in any set of the first set of oil guide holes from the center gradually decreases. The second set of oil guide holes includes a second notch extending radially inward from the annular side edge and a plurality of second oil guide ports spaced apart. The second notch and the plurality of second oil guide ports are respectively provided corresponding to one of the stator slots or the stator teeth, and the radial distance of the plurality of second oil guide ports from the center in any set of the second set of oil guide holes gradually decreases. Along the radial direction of the second lamination, the first set of oil guide holes is closer to the outer edge of the second lamination than the second set of oil guide holes.

2. A stator core according to claim 1, characterized in that The first lamination has multiple sets of oil inlet notches on its outer circumference, and each oil inlet notch corresponds to one of the stator slots or stator teeth; multiple layers of the first lamination are stacked and the multiple oil inlet notches are connected to form a main oil supply channel, which is used to introduce cooling oil.

3. A stator core according to claim 2, characterized in that A set of oil inlet gaps includes a first oil inlet and a second oil inlet, wherein the first oil inlet is correspondingly provided with the first gap, and the second oil inlet is correspondingly provided with the second gap.

4. A stator core according to claim 1, characterized in that The second lamination in the multilayer is offset and deflected along the stacking direction; Along the stacking direction, multiple layers of the second stampings with first notches and multiple first oil guide ports are partially stacked in a staggered manner to form a first oil injection channel, and multiple layers of the second stampings with second notches and multiple second oil guide ports are partially stacked in a staggered manner to form a second oil injection channel.

5. A stator core according to claim 4, characterized in that The first fuel injection channel has a first tilt angle, and the second fuel injection channel has a second tilt angle, wherein the first tilt angle is different from the second tilt angle.

6. A stator core according to claim 1, characterized in that The second lamination group includes group A connected to the first lamination group, and groups B, C and D connected axially in sequence; the lamination thickness of group A is greater than or equal to the lamination thickness of group B, the lamination thickness of group C and the lamination thickness of group D.

7. A stator core according to claim 6, characterized in that In each of the groups A, B, C, and D, the projections of the first group of oil guide holes and the second group of oil guide holes on the plurality of second laminations overlap along the stacking direction.

8. A stator core according to claim 6, characterized in that The groups A, B, C, and D are offset and staggered along the stacking direction; the multiple first oil guide ports on the second laminations in the groups A, B, C, and D respectively include at least a second hole, a third hole, and a fourth hole; the multiple second oil guide ports on the second laminations in the groups A, B, C, and D respectively include at least a B hole, a C hole, and a D hole; Along the stacking direction, the first notch of group A is misaligned and overlaps with the second hole of group B, the second hole of group B is misaligned and overlaps with the third hole of group C, and the third hole of group C is misaligned and overlaps with the fourth hole of group D; Along the stacking direction, the second notch of group A is misaligned and overlaps with the B hole of group B, the B hole of group B is misaligned and overlaps with the C hole of group C, and the C hole of group C is misaligned and overlaps with the D hole of group D.

9. An electric machine characterized by The motor includes a stator core as described in any one of claims 1 to 8.

10. An automobile characterized by comprising: The vehicle includes the electric motor as described in claim 9.

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