Stator punching sheet, stator core, motor and vehicle

Abstract

The utility model relates to a stator punching sheet, a stator core, a motor and a vehicle, the stator punching sheet is provided with a first flow channel structure and a second flow channel structure, one or more stator punching sheets which are laminated along the axial direction are used for forming a group of stator core segments of the stator core, one or more first flow channel structures form a first flow channel of the stator core segments, and one or more second flow channel structures form a second flow channel of the stator core segments. And the one or more second flow channel structures form second flow channels of the stator core sections, and the first flow channels and the second flow channels of two adjacent groups of stator core sections are crossed and communicated. Cooling oil in the first flow channel and the second flow channel can be converted into a turbulent flow state from a stable laminar flow state after being converged, the flow speed of the cooling oil in the turbulent flow state is higher, circulation of the cooling oil is facilitated, the cooling oil in the turbulent flow state has high heat conduction efficiency, and the cooling efficiency of the cooling oil can be improved; in addition, turbulence can be formed only through the stator punching sheets of the same structure, the production cost of the stator punching sheets and the complexity of the production process are reduced, and therefore the economical efficiency of the stator punching sheets is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular, to a stator punching sheet, a stator core, a motor and a vehicle. Background Art

[0002] The motor of an electric vehicle is an important part of the vehicle. The heat dissipation performance of the motor determines the performance of the motor itself, thus ensuring the quality of the vehicle. In the related art, most motors dissipate heat through cooling oil in a laminar flow state. Since the flow rate of cooling oil in a laminar flow state is slow, the cooling effect of the cooling oil on the motor is poor. Utility Model Content

[0003] The purpose of the present disclosure is to provide a stator punching sheet, a stator core, a motor and a vehicle, wherein the cooling flow channel of the stator punching sheet can make the cooling oil therein form turbulence, so as to at least partially solve the above technical problems.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a stator punching sheet, which has a first flow channel structure and a second flow channel structure, and one or more stator punching sheets arranged in an axially stacked manner are used to form a group of stator core segments of a stator core, so that one or more of the first flow channel structures form a first flow channel of the stator core segment, and one or more of the second flow channel structures form a second flow channel of the stator core segment, and the first flow channel and the second flow channel of two adjacent groups of stator core segments are cross-connected.

[0005] Optionally, the first flow channel structure includes a first flow channel groove extending along the circumference of the stator punching sheet.

[0006] Optionally, the first flow channel groove has a first opening opened outwardly in the radial direction of the stator punching sheet, so that the first flow channel is formed between the first flow channel groove and the housing of the motor.

[0007] Optionally, the first flow channel groove is an arc-shaped hole formed on the stator punching sheet and extending in the circumferential direction.

[0008] Optionally, the second flow channel structure includes a second flow channel groove extending along the axial direction of the stator punching sheet.

[0009] Optionally, the second flow channel groove is a through hole axially penetrating the stator punching sheet.

[0010] Optionally, the second flow channel groove has a second opening that opens outward in the radial direction of the stator punching sheet.

[0011] Optionally, there are multiple second flow channel grooves, and the multiple second flow channel grooves are arranged at intervals along the circumferential direction.

[0012] Optionally, the stator punching sheet includes a first sector ring area and a second sector ring area, the first flow channel structure is formed on the first sector ring area, and the second flow channel structure is formed on the second sector ring area.

[0013] Optionally, the central angle of the first sector ring area is 180°-270°, and the central angle of the second sector ring area is 90°-180°.

[0014] Optionally, the outer diameter of the first sector ring region is smaller than the outer diameter of the second sector ring region, so that the peripheral wall of the first sector ring region and the side wall adjacent to the peripheral wall formed on the second sector ring region jointly form a first flow channel structure.

[0015] According to a second aspect of the present disclosure, a stator core is provided, comprising a plurality of stator core segments stacked in an axial direction, the stator core segments comprising one or more of the above-mentioned stator punching sheets stacked in an axial direction, and two adjacent stator core segments are staggered by a preset angle in the circumferential direction so that the first flow channel and the second flow channel are cross-connected.

[0016] Optionally, from one end of the stator core to the other end along the axial direction, the stator core segments at odd positions form a first group of stator core segments, and the stator core segments at even positions form a second group of stator core segments, and the second group of stator core segments are staggered by the preset angle in the circumferential direction relative to the first group of stator core segments to form a stator oil inlet channel extending along the axial direction.

[0017] Optionally, the first flow channel has a flow channel section that is axially connected to another adjacent first flow channel, and the flow channel sections of each stator core segment together form the stator oil inlet channel.

[0018] Optionally, a central angle from one side to the other side of the stator oil inlet channel along the circumferential direction is less than or equal to 180°.

[0019] According to a third aspect of the present disclosure, a motor is provided, comprising the above-mentioned stator core.

[0020] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned motor.

[0021] Through the above technical scheme, one or more stator punching sheets of the present invention can be stacked along the axial direction to form a stator core segment, the first flow channel structure of one or two adjacent stator punching sheets can form a first flow channel, and the second flow channel structure of one or two adjacent stator punching sheets can form a second flow channel. The first flow channel and the second flow channel on the two adjacent stator core segments can be cross-connected, so that the cooling oil in the first flow channel and the second flow channel can be transformed from a stable laminar state to a turbulent state after the intersection. Compared with the related art that only uses cooling oil in a laminar state to cool the stator core, the cooling oil in a turbulent state has a faster flow rate, which is beneficial to the circulation of the cooling oil, and the cooling oil in a turbulent state has a higher heat conduction efficiency, which can improve the cooling efficiency of the cooling oil. In addition, the present invention can form turbulence only through stator punching sheets of the same structure, reducing the production cost of the stator punching sheets and the complexity of the production process, thereby improving the economy of the stator punching sheets.

[0022] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0024] Figure 1 is a schematic structural diagram of a stator punching sheet provided in an embodiment of the present disclosure;

[0025] Figure 2 is a schematic structural diagram of a stator core segment provided by an embodiment of the present disclosure;

[0026] Figure 3 is a schematic structural diagram of a stator core provided in an embodiment of the present disclosure;

[0027] Figure 4 It is a schematic diagram of the oil circuit structure of the stator core provided in an embodiment of the present disclosure.

[0028] Description of Reference Numerals

[0029] 1- stator punching sheet; 2- first flow channel structure; 3- second flow channel structure; 4- first flow channel groove; 41- first opening; 5- second flow channel groove; 51- through hole; 6- first fan ring area; 7- second fan ring area; 8- stator core; 9- stator core segment; 91- first flow channel; 911- flow channel segment; 92- second flow channel; 10- stator oil inlet channel. DETAILED DESCRIPTION

[0030] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0031] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to "inside" and "outside" relative to the corresponding component's own outline. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0032] The stator sheet and the stator core in the exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0033] refer to Figures 1 to 4 As shown, in the first aspect of the present disclosure, a stator punching sheet is provided, wherein the stator punching sheet 1 has a first flow channel structure 2 and a second flow channel structure 3, and one or more stator punching sheets 1 stacked in the axial direction are used to form a group of stator core segments 9 of the stator core 8, so that one or more first flow channel structures 2 form a first flow channel 91 of the stator core segment 9, and one or more second flow channel structures 3 form a second flow channel 92 of the stator core segment 9, and the first flow channels 91 and the second flow channels 92 of two adjacent groups of stator core segments 9 are cross-connected. The cooling oil in the first flow channel 91 and the second flow channel 92 will meet at the connection point between the two, thereby changing the cooling oil from a smooth laminar state to a turbulent state. Compared with the related art that only uses cooling oil in a laminar state to cool the stator core 8, the cooling oil in a turbulent state has a faster flow rate, which is beneficial to the circulation of the cooling oil, and the cooling oil in a turbulent state has a higher heat conduction efficiency, which can improve the cooling efficiency of the cooling oil. In addition, compared with the related art that requires a variety of stator punchings with different structures to form a turbulent stator core, the present invention can form turbulence only through stator punchings 1 with the same structure, reducing the production cost of the stator punchings 1 and the complexity of the production process, thereby improving the economy of the stator punchings 1.

[0034] In some embodiments of the present disclosure, the first flow channel structure 2 includes a first flow channel groove 4 extending along the circumference of the stator punching sheet 1. The first flow channel groove 4 allows the cooling oil to flow along the circumference of the stator punching sheet 1 after entering the first flow channel groove 4. Accordingly, in the stator core segment 9 formed by one or more stator punching sheets or the stator core 8 formed by one or more stator core segments 9, the cooling oil will flow along the first flow channel 91 formed by the first flow channel groove 4 in the circumferential direction of the stator core segment 9 or the stator core 8, thereby cooling a partial area of ​​the stator core segment 9 or the stator core 8.

[0035] In some embodiments, reference Figure 1 and Figure 2As shown, the first flow channel groove 4 can also have a first opening 41 that is open radially outward along the stator punching sheet 1, so that a first flow channel 91 is formed between the first flow channel groove 4 and the housing of the motor, that is, the outer peripheral wall of the stator punching sheet 1 forms the bottom wall of the first flow channel 91, and the inner side wall of the motor is arranged around the first flow channel 91 to form the inner side wall of the first flow channel 91, thereby facilitating the cooling oil to flow along the first flow channel. In addition, compared with the first flow channel groove 4 that is directly opened on the stator punching sheet 1 and is closed along its own circumference, the first flow channel groove 4 with the first opening uses less material, can save costs, and improve the economy of the stator punching sheet.

[0036] In other embodiments not shown in the figure, the first flow channel groove 4 may be an arc-shaped groove structure that is closed along its own circumference. For example, the first flow channel groove 4 may be an arc-shaped hole extending along the circumferential direction formed on the stator punching sheet 1. In this way, after the cooling oil enters the stator core 8 or the stator core segment 9, it will flow in the circumferential direction of the stator core 8 or the stator core segment 9 along the extension direction of the arc-shaped hole, thereby achieving the effect of cooling the stator core 8.

[0037] In some embodiments, reference Figure 1 and Figure 2 As shown, the second flow channel structure 3 includes a second flow channel groove 5 extending in the axial direction of the stator punching sheet 1. The second flow channel groove 5 arranged in the axial direction can make the cooling oil flow in the axial direction of the stator punching sheet 1 after entering the second flow channel groove 5. Accordingly, in the stator core segment 9 formed by one or more stator punching sheets 1 or the stator core 8 formed by one or more stator core segments 9, the cooling oil will flow in the axial direction of the stator core segment 9 or the stator core 8 along the second flow channel 92 formed by the second flow channel groove 5, thereby cooling a partial area of ​​the stator core segment 9 or the stator core 8.

[0038] Among them, the second flow channel groove 5 can be a through hole 51 that axially penetrates the stator punching sheet 1, that is, after the cooling oil enters the stator core 8 or the stator core segment 9, it can pass through the through hole 51 set on the stator punching sheet 1 of the stator core segment 9 in sequence, thereby flowing in the axial direction of the stator core 8 or the stator core segment 9 to achieve the effect of cooling the stator core 8.

[0039] Of course, in some embodiments not shown in the figure, the second flow channel groove 5 may also have a second opening that is open radially outward along the stator punching sheet 1 to reduce the material of the stator punching sheet 1, save production costs, and improve the economy of the stator punching sheet 1. Specifically, the second flow channel groove 5 can form a second flow channel 92 together with the motor housing.

[0040] In addition, in order to ensure the flow efficiency of the cooling oil in the second flow channel 92 formed by the second flow channel groove 5, the number of the second flow channel grooves 5 can be multiple, and the multiple second flow channel grooves 5 are arranged at intervals along the circumferential direction to increase the flow rate of the cooling oil flowing in the axial direction, thereby improving the cooling effect of the cooling oil on the stator core 8.

[0041] It should be noted that the setting direction of the first flow channel 91 is not limited to the circumferential setting of the stator punching sheet 1. Similarly, the setting direction of the second flow channel 92 is not limited to the axial setting of the stator punching sheet. As long as the two flow channels are staggered so that the cooling oil in the first flow channel 91 and the second flow channel 92 can converge to form irregular turbulence.

[0042] In the embodiment of the present disclosure, the first flow channel 91 is arranged along the circumference of the stator punching sheet 1, and the second flow channel 92 is arranged along the axial direction of the stator punching sheet 1, so that the flow direction of the cooling oil in the two flow channels is at a right angle when they intersect, so as to increase the degree of collision of the cooling oil in two directions when they intersect, thereby ensuring the flow rate and heat conduction efficiency of the cooling oil when the cooling oil changes from a laminar state to a turbulent state after the intersection and collision, thereby ensuring the cooling effect of the cooling oil on the stator core.

[0043] In some embodiments of the present disclosure, the stator sheet includes a first sector ring area 6 and a second sector ring area 7, the first flow channel structure 2 is formed on the first sector ring area 6, and the second flow channel structure 3 is formed on the second sector ring area 7. That is, the first flow channel structure 2 and the second flow channel structure 3 are arranged in corresponding areas of the stator sheet 1, so that only one set of molds is used when producing the stator sheet 1, which simplifies the production process and production cost of the stator sheet, and improves the economy of the stator sheet.

[0044] The central angle of the first ring sector area 6 can be 180°-270°, the central angle of the second ring sector area 7 can be 90°-180°, and when the sum of the central angles of the first ring sector area 6 and the second ring sector area 7 is 360°, the cooling effect of the cooling oil on the stator core 8 formed by the stator sheet 1 is the best. Of course, the central angles of the first ring sector area and the second ring sector area can also be any other angles that can have the first flow channel structure and the second flow channel structure.

[0045] In addition, the outer diameter of the first fan ring area 6 is smaller than the outer diameter of the second fan ring area 7, so that the peripheral wall of the first fan ring area 6 and the side wall formed on the second fan ring area 7 adjacent to the peripheral wall together form the first flow channel structure 2. In this way, it is possible to avoid the situation in which the first fan ring area 6 of one stator core segment 9 blocks the second flow channel structure 3 on the other stator core segment 9 due to the excessively large outer diameter of the two adjacent stator core segments 9, so as to ensure that the cooling oil can flow along the first flow channel 91 and the second flow channel 92 and intersect to form turbulence.

[0046] In a second aspect of the present disclosure, a stator core is provided, such as Figure 3 and Figure 4As shown, the stator core 8 includes a plurality of stator core segments 9 stacked in the axial direction, the stator core segment 9 includes one or more stator punching sheets 1 stacked in the axial direction, and two adjacent stator core segments 9 are staggered by a preset angle in the circumferential direction, so that the first flow channel 91 and the second flow channel 92 are cross-connected. Since the two adjacent stator core segments 9 are staggered by a preset angle in the circumferential direction, the axial projection of the first flow channel 91 on one of the stator core segments 9 can partially overlap with the axial projection of the second flow channel 92 on the other stator core segment 9, so that the cooling oil flowing in the first flow channel 91 of one of the stator core segments 9 can intersect with the cooling oil flowing in the second flow channel 92 of the other stator core segment 9 to form turbulence.

[0047] In some embodiments of the present disclosure, the stator core 8 can be formed by a plurality of stator core segments 9 stacked in the axial direction. Based on this, from one end to the other end of the stator core 8 in the axial direction, the stator core segments 9 in odd positions can form a first group of stator core segments, and the stator core segments 9 in even positions can form a second group of stator core segments. The second group of stator core segments are staggered at a preset angle in the circumferential direction relative to the first group of stator core segments to form a stator oil inlet channel 10 extending in the axial direction. After entering the stator oil inlet channel 10, the cooling oil will flow along the extension direction of the stator oil inlet channel 10. At the same time, part of the cooling oil will flow into the first flow channel 91 and the second flow channel 92 in each stator core segment 9, so that the cooling oil in the first flow channel 91 of one stator core segment 9 in two adjacent stator core segments 9 can intersect with the cooling oil in the second flow channel 92 of the other stator core segment 9, thereby forming turbulence to improve the cooling effect.

[0048] In some embodiments, the first flow channel 91 has a flow channel segment 911 connected to another adjacent first flow channel 91 in the axial direction, and each flow channel segment 911 of each stator core segment 9 together forms a stator oil inlet channel 10. Therefore, by using the flow channel segment 911 of the first flow channel 91 to form the stator oil inlet channel 10, it is possible to avoid opening other channels, and it is only necessary to adjust the circumferential angle of the stator core segment 9 during assembly, which is simple to manufacture and low in cost.

[0049] Specifically, the central angle of the stator oil inlet channel 10 from one side to the other side along the circumferential direction is less than or equal to 180° to ensure that the cooling oil can flow into the first flow channel and the second flow channel, and the smaller the central angle of the stator oil inlet channel from one side to the other side along the circumferential direction, the faster the flow rate of the cooling oil in the stator oil inlet channel 10, thereby ensuring the flow rate of the cooling oil, improving the circulation efficiency of the cooling oil, and ensuring the cooling effect. In addition, when the cooling oil enters from both ends of the stator oil inlet channel 10, the cooling oil with a faster flow rate can also form turbulence to further enhance the cooling effect.

[0050] In addition, the stator oil inlet passage 10 may be provided with one or more, as long as it can allow the cooling oil to enter the stator core 8 and allow the cooling oil to flow to the first flow channel 91 and the second flow channel 92 .

[0051] In some embodiments not shown in the figures, the stator oil inlet passage 10 may also be provided on the motor housing, and the stator oil inlet passage 10 on the motor housing may be directly connected to the first flow passage 91 or the second flow passage 92 .

[0052] The following specifically describes the process of stator core segments of the present invention being staggered and stacked to form a stator core. Taking the stacking process of two adjacent stator core segments 9 as an example, the first flow channels 91 of the two stator core segments 9 are both composed of first flow channel grooves 4, and the second flow channels 92 of the two stator core segments 9 are both composed of through holes 51 opened along the axial direction of the stator punching sheet 1, and the center angles of the first sector ring area 6 and the second sector ring area 7 of the two stator core segments 9 are both 180°. When the two stator core segments 9 are stacked, their axial projections are first completely overlapped, and then one of the stator core segments 9 is rotated 180° about its center. Since the center angles of the first sector ring area 6 and the second sector ring area 7 are 180°, after one of the stator core segments 9 is rotated, The first fan ring area 6 of one stator core segment 9 overlaps with the second fan ring area 7 of the other stator core segment 9. Similarly, the second fan ring area 7 of one stator core segment 9 will also overlap with the first fan ring area 6 of the other stator core segment 9 in the axial direction. Finally, one stator core 8 is rotated by a preset angle so that the flow channel sections 911 of the first flow channels 91 of the two stator core segments 9 are connected to form a stator oil inlet channel 10. At this point, the two adjacent stator cores 8 are in a stacked state, and since the odd-numbered layers of the stator core 8 can completely overlap in their axial projections, the even-numbered layers of the stator core 8 can completely overlap in their axial projections, the stator core segments 9 are stacked in sequence according to the above-mentioned setting state to form a complete stator core.

[0053] The preset angle of rotation of the stator core is less than or equal to 180°.

[0054] A third aspect of the present disclosure provides a motor, which includes the above-mentioned stator core. It should be noted that the motor has all the beneficial effects of the above-mentioned stator core, which will not be elaborated in the present disclosure.

[0055] A fourth aspect of the present disclosure provides a vehicle, which includes the above-mentioned motor. It should be noted that the vehicle has all the beneficial effects of the above-mentioned motor, which will not be elaborated in the present disclosure.

[0056] In summary, the present disclosure exemplarily illustrates the process of cooling stator punching sheets and stator core by cooling oil.

[0057] The first flow channel structure 2 and the second flow channel structure 3 on the stator punching sheet 1 respectively form a first flow channel 91 and a second flow channel 92 on the stator core segment 9 formed by stacking one or more stator punching sheets 1. Then, the plurality of stator core segments 9 are stacked in an axial direction of the stator core segment 9 in an alternate manner to form a stator core 8. The flow channel segments 911 of the first flow channels 91 of the plurality of stator core segments 9 form a stator oil inlet channel 10, so that after the cooling oil flows from the motor housing or the oil injection rings located at both ends of the stator core 8 to the stator oil inlet channel 10, it can flow to the first flow channel 91 and the second flow channel 92 of each stator core segment 9 under the action of the stator oil inlet channel 10, so that in two adjacent stator core segments 9, the first flow channel groove 4 of one stator core segment 9 The cooling oil in the first flow channel 91 formed with the motor housing can intersect with the cooling oil in the second flow channel 92 formed by the through hole of another stator core segment 9, so that the cooling oil in the first flow channel 91 and the second flow channel 92 can be transformed from a smooth laminar state to a turbulent state after the intersection. Compared with the related art that only uses cooling oil in a laminar state to cool the stator core, the cooling oil in a turbulent state has a faster flow rate, which is conducive to the circulation of the cooling oil, and the cooling oil in a turbulent state has a higher heat conduction efficiency, which can improve the cooling efficiency of the cooling oil. In addition, the present invention can form turbulence only through stator punching sheets of the same structure, which reduces the production cost of the stator punching sheets and the complexity of the production process, thereby improving the economy of the stator punching sheets.

[0058] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0059] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0060] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A stator punching sheet, characterized in that: The stator punching sheet has a first flow channel structure and a second flow channel structure. One or more stator punching sheets stacked in the axial direction are used to form a group of stator core segments of the stator core, so that one or more of the first flow channel structures form the first flow channel of the stator core segment, and one or more of the second flow channel structures form the second flow channel of the stator core segment, and the first flow channel and the second flow channel of two adjacent groups of stator core segments are cross-connected.

2. The stator sheet according to claim 1, characterized in that: The first flow channel structure includes a first flow channel groove extending along the circumferential direction of the stator punching sheet.

3. The stator sheet according to claim 2, characterized in that: The first flow channel groove has a first opening opened outwardly in the radial direction of the stator punching sheet, so that the first flow channel is formed between the first flow channel groove and the housing of the motor.

4. The stator sheet according to claim 2, characterized in that: The first flow channel groove is an arc-shaped hole formed on the stator punching sheet and extending along the circumferential direction.

5. The stator sheet according to claim 1, characterized in that: The second flow channel structure includes a second flow channel groove extending along the axial direction of the stator punching sheet.

6. The stator sheet according to claim 5, characterized in that: The second flow channel groove is a through hole that axially penetrates the stator punching sheet.

7. The stator sheet according to claim 5, characterized in that: The second flow channel groove has a second opening opened outwardly in the radial direction of the stator punching sheet.

8. The stator sheet according to claim 5, characterized in that: There are multiple second flow channel grooves, and the multiple second flow channel grooves are arranged at intervals along the circumferential direction.

9. The stator sheet according to claim 1, characterized in that: The stator punching sheet includes a first sector ring area and a second sector ring area, the first flow channel structure is formed on the first sector ring area, and the second flow channel structure is formed on the second sector ring area.

10. The stator sheet according to claim 9, characterized in that: The central angle of the first sector ring area is 180°-270°, and the central angle of the second sector ring area is 90°-180°.

11. The stator sheet according to claim 9, characterized in that: The outer diameter of the first sector ring region is smaller than the outer diameter of the second sector ring region, so that a peripheral wall of the first sector ring region and a side wall adjacent to the peripheral wall and formed on the second sector ring region jointly form a first flow channel structure.

12. A stator core, characterized in that: The stator core includes a plurality of stator core segments stacked in the axial direction, and the stator core segments include one or more stator punching sheets according to any one of claims 1 to 11 stacked in the axial direction, and two adjacent stator core segments are staggered by a preset angle in the circumferential direction so that the first flow channel and the second flow channel are cross-connected.

13. The stator core according to claim 12, characterized in that: From one end of the stator core to the other end along the axial direction, the stator core segments at odd positions form a first group of stator core segments, and the stator core segments at even positions form a second group of stator core segments. The second group of stator core segments are staggered by the preset angle in the circumferential direction relative to the first group of stator core segments to form a stator oil inlet channel extending along the axial direction.

14. The stator core according to claim 13, characterized in that: The first flow channel has a flow channel section which is axially connected with another adjacent first flow channel, and the flow channel sections of the stator core segments together form the stator oil inlet channel.

15. The stator core according to claim 14, characterized in that: A central angle from one side to the other side of the stator oil inlet channel along the circumferential direction is less than or equal to 180°.

16. A motor, characterized in that: The stator core comprises the stator core according to any one of claims 12 to 15.

17. A vehicle, characterized in that: Includes the motor as claimed in claim 16.

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