Stator, motor and vehicle
By designing oil inlet holes, oil guide channels, and oil injection holes on the stator core, the problem of increased structural complexity caused by the oil injection pipe was solved, achieving effective cooling of the winding and space saving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHERY AUTOMOBILE CO LTD
- Filing Date
- 2026-01-08
- Publication Date
- 2026-05-15
AI Technical Summary
In existing motors, the arrangement of the fuel injection pipe inside the motor housing increases the complexity of the internal structure, affecting the cooling effect of the windings and space utilization.
Oil inlet holes, oil guide channels, and oil spray holes are opened on the stator core. Cooling oil flows inside the stator through these structures and is sprayed onto the winding ends to achieve a cooling effect without the need for additional delivery pipes.
This achieves effective cooling of the windings, reduces the complexity of the motor's internal structure, and saves space.
Smart Images
Figure CN122052372A_ABST
Abstract
Description
Technical Field
[0001] This disclosure pertains to the field of vehicle motor technology, and particularly relates to a stator, a motor, and a vehicle. Background Technology
[0002] The stator of an electric motor consists of an iron core and windings. The iron core is fitted onto the windings and is typically composed of multiple laminated laminations. During motor operation, the windings continuously generate a large amount of heat. If this heat is not dissipated in time, the windings may overheat, leading to the failure of the insulation layer between the windings and the iron core. Therefore, it is necessary to cool the windings to ensure they operate within their normal temperature range.
[0003] To cool the windings, an oil spray pipe is usually installed inside the motor housing, aligned with the ends of the windings. Cooling oil is sprayed onto the ends of the windings through the oil spray pipe to achieve the effect of cooling the windings.
[0004] However, arranging the fuel injection pipe inside the motor housing requires reserving space for the fuel injection pipe within the motor housing, which increases the complexity of the motor's internal structure. Summary of the Invention
[0005] This disclosure provides a stator, a motor, and a vehicle, which can solve the technical problems existing in related technologies. The technical solution is as follows: This disclosure provides a stator, which includes an iron core and windings; The iron core has an oil inlet hole, an oil guide channel and an oil spray hole connected in sequence. The oil inlet hole is opened on the outer side of the iron core and is used to allow cooling oil to flow in. The oil spray hole is opened on the end faces of both ends of the iron core and is used to allow cooling oil to be sprayed out. The winding passes through the iron core, and the two ends of the winding protrude from the two ends of the iron core respectively. The ends of the winding extend outward away from the central axis of the iron core to receive the cooling oil sprayed from the oil injection hole.
[0006] In some possible implementations, the oil guide channel includes an axial channel and a radial channel; The axial channel extends along the axial direction of the iron core and communicates with the oil inlet hole; The radial channel extends radially along the iron core, with one end connected to the axial channel and the other end connected to the oil injection hole.
[0007] In some possible implementations, the cross-sectional area of the radial channel is smaller than that of the axial channel.
[0008] In some possible implementations, the iron core includes a first core segment, a second core segment, a third core segment, and a fourth core segment; The first core segment has the oil inlet hole, the second core segment has the axial channel, the third core segment has the radial channel, and the fourth core segment has the oil injection hole; The first core segment, the second core segment, the third core segment, and the fourth core segment are stacked sequentially along the axial direction of the iron core.
[0009] In some possible implementations, the first core segment includes a plurality of stacked first laminations; An oil inlet groove is formed on the outer edge of the first stamping, the oil inlet groove extends through both ends of the first stamping, and multiple oil inlet grooves form the oil inlet hole.
[0010] In some possible implementations, the second core segment comprises a plurality of stacked second laminations; The second lamination has an axial oil groove that extends through both ends of the second lamination, and the plurality of axial oil grooves form the axial channel.
[0011] In some possible implementations, the third core segment comprises a plurality of stacked third laminations; The third stamping is provided with radial oil grooves, which extend through both ends of the third stamping, and multiple radial oil grooves form the radial channel.
[0012] In some possible implementations, the fourth core segment comprises a plurality of stacked fourth laminations; The fourth stamping is provided with an oil injection groove, which extends through both ends of the fourth stamping, and multiple oil injection grooves form the oil injection hole.
[0013] This disclosure also provides an electric motor, including the stator as described above.
[0014] This disclosure also provides a vehicle including the motor described above.
[0015] The technical solution provided in this disclosure includes at least the following beneficial effects: The stator provided in this disclosure, by opening an oil inlet, an oil guide channel, and an oil spray hole on the stator, allows cooling oil to flow sequentially through the oil inlet, the oil guide channel, and the oil spray hole, and then spray out from the oil spray hole onto the end of the winding, thereby cooling the winding. This realizes that the cooling oil flows inside the stator and is sprayed onto the end of the winding, eliminating the need for additional delivery pipes inside the motor to transport the cooling oil, saving internal space of the motor, and reducing the complexity of the internal structure of the motor.
[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description
[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings: Figure 1 This is a schematic diagram of a stator provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of a fourth lamination provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of an oil guiding channel for an iron core provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of a first lamination provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of an iron core provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of a second lamination provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of a third lamination provided in an embodiment of this disclosure.
[0018] Legend 1. Stator; 10. Iron core; 101. Installation slot; 101. Oil inlet hole; 102. Oil guide channel; 102a. Axial channel; 102b. Radial channel; 103. Oil injection hole; 104. Circumferential channel; 105. First core segment; 1051. First lamination; 1051a. Oil inlet groove; 106. Second core segment; 1061. Second lamination; 1061a. Axial oil groove; 107. Third core segment; 1071. Third lamination; 1071a. Radial oil groove; 108. Fourth core segment; 1081. Fourth lamination; 1081a. Oil injection groove; 11. Winding.
[0019] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.
[0021] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.
[0022] This disclosure provides a stator 1, with reference to... Figure 1 The stator 1 includes an iron core 10 and a winding 11. The iron core 10 has an oil inlet 101, an oil guide channel 102, and an oil spray hole 103 connected in sequence. The oil inlet 101 is opened on the outer surface of the iron core 10 and is used to allow cooling oil to flow in. The oil spray hole 103 is opened on the end faces of both ends of the iron core 10 and is used to allow cooling oil to be sprayed out. The winding 11 passes through the iron core 10, and both ends of the winding 11 protrude from both ends of the iron core 10. The ends of the winding 11 expand outward in a direction away from the central axis of the iron core 10 to receive the cooling oil sprayed out by the oil spray hole 103.
[0023] refer to Figure 1 Along the axial direction of the iron core 10, oil guide channels 102 are provided on both sides of the cooling oil. Both sides of the oil guide channels 102 are connected to the cooling oil and are respectively connected to the oil spray holes 103 at both ends of the iron core 10. The cooling oil flows in from the oil inlet 101, flows from the middle to both ends through the oil guide channels 102 on both sides, and flows to the oil spray holes 103 at both ends of the iron core 10. Finally, it is sprayed out from the oil spray holes 103 at both ends of the iron core 10 and sprayed onto both ends of the winding 11, thereby cooling the winding 11.
[0024] By adopting the technical solution of this disclosure, by opening an oil inlet hole 101, an oil guide channel 102 and an oil spray hole 103 on the stator 1, the cooling oil can flow through the oil inlet hole 101, the oil guide channel 102 and the oil spray hole 103 in sequence, and spray out from the oil spray hole 103 and spray onto the end of the winding 11, thereby cooling the winding 11. This realizes that the cooling oil flows inside the stator 1 and is sprayed onto the end of the winding 11, eliminating the need to arrange additional conveying pipes inside the motor to transport the cooling oil, saving space inside the motor and reducing the complexity of the internal structure of the motor.
[0025] In some possible implementations, the outer surface of the iron core 10 can be fitted with the inner surface of the motor housing (not shown in the figure), and the motor housing is provided with an oil passage (not shown in the figure). One end of the oil passage passes through the inner surface of the motor housing and is aligned with and connected to the oil inlet 101. The other end of the oil passage passes through the outer surface of the motor housing for the input of cooling oil.
[0026] Cooling oil flows in from one end of the oil passage that runs through the outer surface of the motor housing, flows along the oil passage to the other end that runs through the inner surface of the motor housing, and then flows to the oil inlet 101.
[0027] In some possible implementations, the oil inlet 101 may be located in the middle of the iron core 10 in the axial direction.
[0028] The oil inlet 101 is positioned at the middle of the axial direction of the iron core 10, so that the cooling oil flows into the oil inlet 101 and flows through the oil guide channels 102 on both sides to the oil spray holes 103 at both ends of the iron core 10. The cooling oil reaches the oil spray holes 103 at both ends of the iron core 10 at approximately the same time, thereby cooling both ends of the winding 11 simultaneously.
[0029] It should be noted that, along the axial direction of the core 10, the structures of the core 10 and the winding 11 on both sides of the oil inlet 101 can be considered as mirror images. For the sake of simplification, in the following possible embodiments, the description will be based on the angle of one side of the oil inlet 101. For example, if only the oil guide channel 102 and the oil injection hole 103 on one side of the oil inlet 101 are described, the oil guide channel 102 and the oil injection hole 103 on the other side of the oil inlet 101 can be considered as mirror images of that side.
[0030] In some possible implementations, refer to Figure 2 There are multiple oil injection holes 103, which can be arranged at intervals along the circumference of the iron core 10. All of the multiple oil injection holes 103 are used to spray out cooling oil.
[0031] Since multiple oil injection holes 103 are arranged at intervals along the circumference of the iron core 10, after the multiple oil injection holes 103 spray out the cooling oil, the cooling oil can be sprayed to multiple different areas at the end of the winding 11, thereby forming multi-point cooling at the end of the winding 11 and ensuring the uniformity of cooling at the end of the winding 11 as much as possible.
[0032] In some possible implementations, the orthographic projection of the end of the winding 11 onto the end face of the core 10 can cover the oil injection hole 103, and the distance between the oil injection hole 103 and the end of the winding 11 in the axial direction of the core 10 is less than a preset distance.
[0033] Understandably, during motor operation, some oil injection holes 103 will inevitably be located roughly above the winding 11. The cooling oil sprayed from these holes, even if the distance between the injection hole 103 and the end of the winding 11 is relatively large, will still fall onto the end of the winding 11 due to the parabolic motion caused by gravity. However, some oil injection holes 103 are located roughly below the winding 11. If the distance between the injection hole 103 and the end of the winding 11 is relatively large, the cooling oil sprayed from these holes may not reach the end of the winding 11 due to the parabolic motion caused by gravity. Similarly, some oil injection holes 103 are located roughly to the side of the winding 11. The cooling oil sprayed from these holes may not reach the end of the winding 11 because its spray path is offset from the winding 11, thus only a portion of the end of the winding 11 is cooled. Based on this, the end of the winding 11 can be expanded outward in a direction away from the central axis of the iron core 10, so that the orthographic projection of the end of the winding 11 on the end face of the iron core 10 can cover the oil spray hole 103. At the same time, the distance between the oil spray hole 103 and the end of the winding 11 in the axial direction of the iron core 10 is less than a preset distance, that is, the distance between the oil spray hole 103 and the end of the winding 11 in the axial direction of the iron core 10 is reduced. Then, after the cooling oil is sprayed out of the oil spray hole 103, the cooling oil can be directly sprayed onto the surface of the end of the winding 11 that is roughly facing the end face of the iron core 10 before it falls a significant height. This ensures that the cooling oil sprayed out by all the oil spray holes 103 can be sprayed onto the end of the winding 11.
[0034] In some possible implementations, refer to Figure 2 The inner edge of the iron core 10 is provided with a plurality of mounting slots 101, which are arranged at intervals along the circumference of the iron core 10. The mounting slots 101 are used to mount the winding 11. Among them, a plurality of oil injection holes 103 are arranged around the plurality of mounting slots 101.
[0035] The mounting groove 101 has a bottom wall facing the central axis of the iron core 10. The distance between the central axis of the plurality of oil injection holes 103 and the central axis of the iron core 10 is greater than the distance between the bottom wall of the plurality of mounting grooves 101 and the central axis of the iron core 10. In other words, the plurality of oil injection holes 103 are arranged around the plurality of mounting grooves 101.
[0036] In some possible implementations, refer to Figure 3 There are multiple oil guiding channels 102, which can be arranged at intervals along the circumference of the iron core 10. All multiple oil guiding channels 102 are connected to the oil inlet 101, and each oil injection hole 103 is connected to at least one oil guiding channel 102.
[0037] In one example, multiple oil guide channels 102 are connected to multiple oil injection holes 103 in a one-to-one correspondence. After the cooling oil flows in through the oil inlet 101, it is divided into multiple parts and flows into the multiple oil guide channels 102 respectively, and then flows to the corresponding oil injection holes 103, and finally sprays from the oil injection holes 103 to the end of the winding 11.
[0038] In another example, each injection hole 103 may be connected to at least two adjacent oil guide channels 102.
[0039] In some possible implementations, refer to Figure 4 The iron core 10 is also provided with a circumferential channel 104, which extends along the circumference of the iron core 10 and is connected to the oil inlet 101 and multiple oil guide channels 102.
[0040] After the cooling oil flows in through the oil inlet 101, it first flows into the circumferential channel 104 and then along the circumferential channel 104. As the cooling oil flows along the circumferential channel 104, it flows into multiple oil guide channels 102 and then into the oil spray holes 103, and finally is sprayed from the multiple oil spray holes 103 to the end of the winding 11.
[0041] In some possible implementations, refer to Figure 1 The oil guide channel 102 includes an axial channel 102a and a radial channel 102b. The axial channel 102a extends axially along the iron core 10 and communicates with the oil inlet 101. The radial channel 102b extends radially along the iron core 10, with one end communicating with the axial channel 102a and the other end communicating with the oil injection hole 103.
[0042] The axial channel 102a is connected to the circumferential channel 104. There can be multiple oil guide channels 102, and therefore multiple axial channels 102a and radial channels 102b.
[0043] After the cooling oil flows in through the oil inlet 101, it first flows into the circumferential channel 104 and along the circumferential channel 104. As the cooling oil flows along the circumferential channel 104, it flows into multiple axial channels 102a, then into multiple radial channels 102b, and then into multiple oil injection holes 103, finally being sprayed from the multiple oil injection holes 103 to the end of the winding 11.
[0044] In some possible implementations, refer to Figure 3 Each oil guide channel 102 may include at least two adjacent axial channels 102a and one radial channel 102b. The at least two axial channels 102a are spaced apart, and one end of the radial channel 102b is connected to the at least two axial channels 102a, while the other end may be connected to an oil injection hole 103.
[0045] After the cooling oil flows in through the oil inlet 101, it first flows into the circumferential channel 104 and along the circumferential channel 104. As the cooling oil flows along the circumferential channel 104, it flows into multiple axial channels 102a. Cooling oil in at least two adjacent axial channels 102a can flow into the same radial channel 102b, and then the cooling oil in the radial channel 102b can flow into the corresponding oil spray hole 103, and finally be sprayed from the oil spray hole 103 to the end of the winding 11.
[0046] Understandably, when the cooling oil pressure is low, an axial channel 102a connected to the same radial channel 102b can be added during the design phase to increase the cooling oil pressure within the radial channel 102b. For example, when the cooling oil pressure is low, each oil guide channel 102 may include three adjacent axial channels 102a and one radial channel 102b, with one end of the radial channel 102b connected to the three axial channels 102a and the other end connected to an oil injection hole 103. When the cooling oil pressure is high, the number of axial channels 102a connected to the same radial channel 102b can be reduced during the design phase to prevent excessive cooling oil pressure within the radial channel 102b. For example, when the cooling oil pressure is high, each oil guide channel 102 may include two adjacent axial channels 102a and one radial channel 102b, with one end of the radial channel 102b connected to the two axial channels 102a and the other end connected to an oil injection hole 103.
[0047] Of course, each oil guide channel 102 may also include an axial channel 102a and a radial channel 102b.
[0048] In some possible implementations, the cross-sectional area of the radial channel 102b is smaller than the cross-sectional area of the axial channel 102a.
[0049] Since the cross-sectional area of the radial channel 102b is smaller than that of the axial channel 102a, the flow velocity of the cooling oil increases after flowing from the axial channel 102a to the radial channel 102b. With this increased flow velocity, the cooling oil flows from the radial channel 102b to the injection hole 103 and is ejected from the injection hole 103 at a higher speed, further ensuring that the cooling oil is sprayed to the end of the winding 11.
[0050] In some possible implementations, refer to Figure 5 The iron core 10 includes a first core segment 105, a second core segment 106, a third core segment 107, and a fourth core segment 108. The first core segment 105 has an oil inlet 101, the second core segment 106 has an axial channel 102a, the third core segment 107 has a radial channel 102b, and the fourth core segment 108 has an oil spray hole 103. The first core segment 105, the second core segment 106, the third core segment 107, and the fourth core segment 108 are stacked sequentially along the axial direction of the iron core 10.
[0051] Understandably, the axial channel 102a and radial channel 102b are inconvenient to process because they are inside the iron core 10. Based on this, the iron core 10 can be divided into a first core segment 105, a second core segment 106, a third core segment 107, and a fourth core segment 108. An oil inlet hole 101 is provided in the first core segment 105, an axial channel 102a is provided in the second core segment 106, a radial channel 102b is provided in the third core segment 107, and an oil spray hole 103 is provided in the fourth core segment 108.
[0052] It should be noted that the number of the second core segment 106, the third core segment 107, and the fourth core segment 108 can all be at least two. At least two second core segments 106, at least two third core segments 107, and at least two fourth core segments 108 are respectively disposed at both ends of the first core segment 105. In other words, the first core segment 105 has a second core segment 106, a third core segment 107, and a fourth core segment 108 disposed at both ends in the axial direction. For example, the number of the second core segment 106, the third core segment 107, and the fourth core segment 108 can all be two. Therefore, along the axial direction of the core 10, they can be stacked sequentially in the order of fourth core segment 108, third core segment 107, second core segment 106, first core segment 105, second core segment 106, third core segment 107, and fourth core segment 108.
[0053] When the oil inlet hole 101 is formed in the first core segment 105, the oil inlet hole 101 can be formed on the outer surface of the first core segment 105 and can extend radially along the first core segment 105. The oil inlet hole 101 can penetrate the end faces of both ends of the first core segment 105 on both axial sides, so that the oil inlet hole 101 communicates with the axial channel 102a when the second core segment 106 is stacked with the first core segment 105. Furthermore, circumferential channels 104 are formed on the end faces of both ends of the first core segment 105, and the circumferential channels 104 communicate with the oil inlet hole 101. It can be understood that when the first core segment 105 and the second core segment 106 are stacked, the oil inlet hole 101 on both axial sides of the first core segment 105 can be closed by the end faces of the second core segment 106 on both sides of the first core segment 105. That is, the sidewall portion forming the oil inlet hole 101 is located in the first core segment 105, and the other portion is located in the end faces of the second core segment 106 on both sides of the first core segment 105.
[0054] When the axial channel 102a is opened in the second core segment 106, the axial channel 102a can be opened along the axial direction of the second core segment 106 at the outer edge adjacent to the second core segment 106, and both ends of the axial channel 102a can penetrate the end faces of both ends of the second core segment 106, so that one end of the axial channel 102a can communicate with the circumferential channel 104 when the second core segment 106 and the first core segment 105 are stacked, and then communicate with the oil inlet hole 101. The other end of the axial channel 102a can communicate with the radial channel 102b when the second core segment 106 and the third core segment 107 are stacked.
[0055] When a radial channel 102b is opened in the third core segment 107, a radial channel 102b can be opened along the radial direction of the third core segment 107, and the radial channel 102b can penetrate both ends of the third core segment 107 on both sides in the axial direction, so that one end of the radial channel 102b can be connected to the axial channel 102a when the third core segment 107 and the second core segment 106 are stacked, and the other end of the radial channel 102b can be connected to the oil injection hole 103 when the third core segment 107 and the fourth core segment 108 are stacked.
[0056] When the oil injection hole 103 is opened in the fourth core segment 108, the oil injection hole 103 can be opened along the central axis of the fourth core segment 108, and the two ends of the oil injection hole 103 can penetrate the two ends of the fourth core segment 108, so that one end of the oil injection hole 103 can be connected to the radial channel 102b when the fourth core segment 108 and the third core segment 107 are stacked, and the other end of the oil injection hole 103 can spray out cooling oil.
[0057] It is understood that the core 10 can be made of laminated laminations, which can reduce eddy current losses in the core 10. Therefore, the first core segment 105, the second core segment 106, the third core segment 107 and the fourth core segment 108 can all be made of laminated laminations, as described in the following possible embodiments.
[0058] In some possible implementations, the first core segment 105 includes a plurality of stacked first laminations 1051. (See reference...) Figure 4 An oil inlet groove 1051a is formed on the outer edge of the first stamping 1051. The oil inlet groove 1051a extends through both ends of the first stamping 1051. Multiple oil inlet grooves 1051a form an oil inlet hole 101 when multiple first stampings 1051 are stacked.
[0059] An oil inlet groove 1051a is formed on the outer edge of the first lamination 1051. When multiple first laminations 1051 are stacked together to form a first core segment 105, the multiple oil inlet grooves 1051a are also combined to form an oil inlet hole 101. It can be understood that since the oil inlet groove 1051a penetrates the end faces of both ends of the first lamination 1051, the first oil inlet hole 101 formed when multiple first laminations 1051 are stacked to form the first core segment 105 also penetrates the end faces of both ends of the first core segment 105.
[0060] In addition, a circumferential channel 104 can be opened near the outer edge of the first lamination 1051. When multiple first laminations 1051 are stacked together to form a first core segment 105, the circumferential channels 104 of the first laminations 1051 are combined to form the circumferential channel 104 of the first core segment 105.
[0061] In some possible implementations, the second core segment 106 includes a plurality of stacked second laminations 1061. (See reference...) Figure 6 The second lamination 1061 has an axial oil groove 1061a, which extends through both ends of the second lamination 1061, and multiple axial oil grooves 1061a form an axial channel 102a.
[0062] The second lamination 1061 has an axial oil groove 1061a near its outer edge, which extends through the end faces of both ends of the second lamination 1061. When multiple second laminations 1061 are stacked together to form a second core segment 106, the multiple axial oil grooves 1061a combine to form an axial channel 102a. It can be understood that since the axial oil groove 1061a extends through the end faces of both ends of the second lamination 1061, the axial channel 102a formed when multiple second laminations 1061 are stacked to form the second core segment 106 also extends through the end faces of both ends of the second core segment 106.
[0063] In some possible implementations, the third core segment 107 includes a plurality of stacked third laminations 1071. (See reference...) Figure 7The third lamination 1071 is provided with a radial oil groove 1071a, which extends through both ends of the third lamination 1071, and multiple radial oil grooves 1071a form a radial channel 102b.
[0064] The third lamination 1071 has radial oil grooves 1071a, which extend through the end faces of both ends of the third lamination 1071. When multiple third laminations 1071 are stacked together to form the third core segment 107, the multiple radial oil grooves 1071a combine to form a radial channel 102b. It can be understood that since the radial oil grooves 1071a extend through the end faces of both ends of the third lamination 1071, the radial channel 102b formed when multiple third laminations 1071 are stacked to form the third core segment 107 also extends through the end faces of both ends of the third core segment 107.
[0065] In some possible implementations, the fourth core segment 108 includes a plurality of stacked fourth laminations 1081. (See reference...) Figure 2 The fourth stamping 1081 is provided with an oil injection groove 1081a, which extends through both ends of the fourth stamping 1081, and multiple oil injection grooves 1081a form an oil injection hole 103.
[0066] The fourth lamination 1081 has an injection groove 1081a, which extends through the end faces of both ends of the fourth lamination 1081. When multiple fourth laminations 1081 are stacked together to form the fourth core segment 108, the multiple injection grooves 1081a combine to form an injection hole 103. It can be understood that since the injection groove 1081a extends through the end faces of both ends of the fourth lamination 1081, the injection hole 103 formed when multiple fourth laminations 1081 are stacked to form the fourth core segment 108 also extends through the end faces of both ends of the fourth core segment 108.
[0067] The technical solutions provided in this disclosure have at least the following beneficial effects: The stator 1 provided in this embodiment of the present disclosure, by opening an oil inlet 101, an oil guide channel 102 and an oil spray hole 103 on the stator 1, allows cooling oil to flow sequentially through the oil inlet 101, the oil guide channel 102 and the oil spray hole 103, and sprayed out from the oil spray hole 103 onto the end of the winding 11, thereby cooling the winding 11. This realizes that the cooling oil flows inside the stator 1 and is sprayed onto the end of the winding 11, eliminating the need to arrange additional conveying pipes inside the motor to transport the cooling oil, saving space inside the motor and reducing the complexity of the internal structure of the motor.
[0068] This disclosure also provides an electric motor, including the stator 1 as described above.
[0069] Specifically, the motor also includes a housing (not shown in the figure), which has an inner surface forming a receiving cavity (not shown in the figure) for accommodating the stator 1. The housing is provided with an oil passage (not shown in the figure), one end of which penetrates the outer surface of the housing, and the other end of which penetrates the inner surface of the housing and communicates with the receiving cavity. When the stator 1 is installed in the receiving cavity, the outer surface of the iron core 10 is in contact with the inner surface of the housing, and the oil inlet 101 is aligned with the end of the oil passage penetrating the inner surface of the housing.
[0070] Cooling oil flows in from one end of the oil passage that runs through the outer surface of the housing, flows through the oil passage to one end of the inner surface of the housing, and then flows into the oil inlet 101.
[0071] This disclosure also provides a vehicle including the motor described above.
[0072] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.
Claims
1. A stator (1), characterized in that, The stator (1) includes an iron core (10) and a winding (11). The iron core (10) has an oil inlet (101), an oil guide channel (102) and an oil spray hole (103) connected in sequence. The oil inlet (101) is opened on the outer side of the iron core (10) and is used to allow cooling oil to flow in. The oil spray hole (103) is opened on the end faces of both ends of the iron core (10) and is used to allow the cooling oil to spray out. The winding (11) passes through the iron core (10), and the two ends of the winding (11) protrude from the two ends of the iron core (10). The ends of the winding (11) extend outward in a direction away from the central axis of the iron core (10) to receive the cooling oil sprayed from the oil injection hole (103).
2. The stator (1) according to claim 1, characterized in that, The oil guide channel (102) includes an axial channel (102a) and a radial channel (102b). The axial channel (102a) extends along the axial direction of the iron core (10) and communicates with the oil inlet (101); The radial channel (102b) extends radially along the iron core (10), with one end connected to the axial channel (102a) and the other end connected to the oil injection hole (103).
3. The stator (1) according to claim 2, characterized in that, The cross-sectional area of the radial channel (102b) is smaller than that of the axial channel (102a).
4. The stator (1) according to claim 2, characterized in that, The iron core (10) includes a first core segment (104), a second core segment (105), a third core segment (106) and a fourth core segment (107). The first core segment (104) has the oil inlet hole (101), the second core segment (105) has the axial channel (102a), the third core segment (106) has the radial channel (102b), and the fourth core segment (107) has the oil injection hole (103). The first core segment (104), the second core segment (105), the third core segment (106) and the fourth core segment (107) are stacked sequentially along the axial direction of the iron core (10).
5. The stator (1) according to claim 4, characterized in that, The first core segment (104) includes multiple stacked first laminations (1041). An oil inlet groove (1041a) is formed on the outer edge of the first punch (1041), the oil inlet groove (1041a) passes through both ends of the first punch (1041), and multiple oil inlet grooves (1041a) form the oil inlet hole (101).
6. The stator (1) according to claim 4, characterized in that, The second core segment (105) includes multiple stacked second laminations (1051); The second punch (1051) has an axial oil groove (1051a) that extends through both ends of the second punch (1051), and the plurality of axial oil grooves (1051a) form the axial channel (102a).
7. The stator (1) according to claim 4, characterized in that, The third core segment (106) includes multiple stacked third laminations (1061). The third punch (1061) is provided with a radial oil groove (1061a), which extends through both ends of the third punch (1061), and multiple radial oil grooves (1061a) form the radial channel (102b).
8. The stator (1) according to claim 4, characterized in that, The fourth core segment (107) includes multiple stacked fourth laminations (1071). The fourth stamping (1071) is provided with an oil injection groove (1071a), which extends through both ends of the fourth stamping (1071), and multiple oil injection grooves (1071a) form the oil injection hole (103).
9. An electric motor, characterized in that, Includes the stator (1) as described in any one of claims 1-8.
10. A vehicle, characterized in that, Includes the motor as described in claim 9.