Stator structure of motor and motor

Abstract

The invention discloses a stator structure of a motor and the motor, and relates to the technical field of motors, the stator structure of the motor comprises a stator iron core, the stator iron core is annular, a plurality of cooling oil channels are formed in the stator iron core, the plurality of cooling oil channels are sequentially arranged at intervals along the circumferential direction of the stator iron core, the cooling oil channels comprise yoke part oil channels and tooth part oil channels, and the yoke part oil channels are communicated with the tooth part oil channels. The yoke part oil ducts and the tooth part oil ducts extend in the axial direction of the stator iron core, the yoke part oil ducts and the tooth part oil ducts are arranged in the radial direction of the stator iron core, the yoke part oil ducts and the tooth part oil ducts are communicated, and the oil inlet and the oil outlet of the same cooling oil duct are located at the same end of the stator iron core in the axial direction of the stator iron core. According to the stator structure, the cooling oil can directly cool the yoke part and the tooth part of the stator core, the heat dissipation capability of the stator core can be improved, the stator core can be cooled uniformly, the heat dissipation efficiency of the stator core can be improved, the cooling effect of the stator core can be improved, and the working efficiency of a motor can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator structure of a motor and a motor having the stator structure. Background Art

[0002] In the related art, the stator structure of the existing motor cannot cool the yoke and teeth of the stator core at the same time, and the stator core is cooled unevenly, resulting in poor heat dissipation effect and low heat dissipation efficiency of the stator core, affecting the working efficiency of the motor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a stator structure for a motor in which cooling oil can directly cool the yoke and teeth of the stator core, thereby improving the heat dissipation capacity of the stator core and evenly cooling the stator core, thereby improving the heat dissipation efficiency of the stator core, enhancing the cooling effect of the stator core, and thus improving the operating efficiency of the motor.

[0004] The present invention also provides a motor using the stator structure.

[0005] According to the first aspect of the present invention, the stator structure of the motor includes: a stator core, which is annular and has a plurality of cooling oil channels formed therein. The plurality of cooling oil channels are arranged in sequence and spaced apart along the circumference of the stator core. The cooling oil channels include a yoke oil channel and a tooth oil channel. The yoke oil channel and the tooth oil channel both extend in the axial direction of the stator core. The yoke oil channel and the tooth oil channel are arranged in the radial direction of the stator core, and the yoke oil channel and the tooth oil channel are connected. The yoke oil channel has an oil inlet, and the tooth oil channel has an oil outlet. Along the axial direction of the stator core, the oil inlet and the oil outlet of the same cooling oil channel are located at the same end of the stator core.

[0006] According to the stator structure of the motor of the embodiment of the present application, by providing a cooling oil channel having a connected yoke oil channel and a tooth oil channel, the cooling oil can directly cool the yoke and teeth of the stator core, achieving the effect of direct heat exchange between the cooling oil and the stator core, which is beneficial to improving the heat dissipation capacity of the stator core, enabling the stator core to withstand higher magnetic loads and operating frequencies, and is beneficial to improving the power density of the motor. In addition, by arranging the oil inlet and oil outlet of the same cooling oil channel at the same end of the stator core along the axial direction of the stator core, the stator core can be cooled evenly, which is beneficial to improving the heat dissipation efficiency of the stator core, improving the cooling effect of the stator core, and improving the operating efficiency of the motor.

[0007] According to some embodiments of the present invention, the cooling oil passage further includes a connecting oil passage, which is connected between the yoke oil passage and the gear oil passage so that the yoke oil passage and the gear oil passage are connected in series.

[0008] According to some embodiments of the present invention, the communicating oil passage extends in a radial direction of the stator core.

[0009] According to some embodiments of the present invention, the plurality of cooling oil channels include: a first type of cooling oil channel and a second type of cooling oil channel. Along the axial direction of the stator core, the stator core has a first end and a second end. The oil inlet and the oil outlet of the first type of cooling oil channel are located at the first end of the stator core, and the oil inlet and the oil outlet of the second type of cooling oil channel are located at the second end of the stator core.

[0010] According to some embodiments of the present invention, one of at least two adjacent cooling oil passages is the first type of cooling oil passage, and the other is the second type of cooling oil passage.

[0011] According to some embodiments of the present invention, the stator core includes: a core body, a first core sheet, a second core sheet, a third core sheet and a fourth core sheet. Along the axial direction of the stator core, the first core sheet and the second core sheet are located on one side of the core body, the second core sheet is located between the first core sheet and the core body, the third core sheet and the fourth core sheet are located on the other side of the core body, and the fourth core sheet is located between the third core sheet and the core body; the first core sheet is formed with a first oil hole, the second core sheet is formed with a second oil hole, and the core body is formed with a third oil hole. The first oil hole, the second oil hole and the third oil hole are arranged in a one-to-one correspondence to form the yoke oil channel of the first type of cooling oil channel, and the first core sheet is shaped The fourth iron core sheet is formed with a fourth oil hole, the second iron core sheet is formed with a fifth oil hole, and the iron core body is formed with a sixth oil hole. The fourth oil hole, the fifth oil hole and the sixth oil hole are arranged in a one-to-one correspondence to form the tooth oil channel of the first type of cooling oil channel; the third iron core sheet is formed with a seventh oil hole, the fourth iron core sheet is formed with an eighth oil hole, and the iron core body is formed with a ninth oil hole. The seventh oil hole, the eighth oil hole and the ninth oil hole are arranged in a one-to-one correspondence to form the yoke oil channel of the second type of cooling oil channel, the third iron core sheet is formed with a tenth oil hole, the fourth iron core sheet is formed with an eleventh oil hole, and the iron core body is formed with a twelfth oil hole. The tenth oil hole, the eleventh oil hole and the twelfth oil hole are arranged in a one-to-one correspondence to form the tooth oil channel of the second type of cooling oil channel.

[0012] According to some embodiments of the present invention, the fourth core sheet is formed with a first connecting oil hole, the first connecting oil hole extends radially along the fourth core sheet and is constructed as a part of the corresponding cooling oil channel, and the first connecting oil hole connects the third oil hole and the sixth oil hole; and / or the second core sheet is formed with a second connecting oil hole, the second connecting oil hole extends radially along the second core sheet and is constructed as a part of the corresponding cooling oil channel, and the second connecting oil hole connects the ninth oil hole and the twelfth oil hole.

[0013] According to some embodiments of the present invention, the structure of the first core piece is the same as that of the third core piece; and / or the structure of the second core piece is the same as that of the fourth core piece.

[0014] According to some embodiments of the present invention, at least a portion of the tooth oil passage is located at a corresponding stator tooth of the stator core.

[0015] The motor according to the second embodiment of the present invention includes the stator structure of the motor described in the above embodiment.

[0016] According to some embodiments of the present invention, the motor further includes: a casing, the stator structure is arranged in the casing, and along the radial direction of the stator structure, the casing has a casing side wall opposite to the stator structure, and the casing side wall is formed with a plurality of oil inlets, and along the axial direction of the stator structure, some of the plurality of oil inlets are located on one side of the stator structure, and another part of the plurality of oil inlets are located on the other side of the stator structure.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 is a side cross-sectional view of a motor according to an embodiment of the present application;

[0020] Figure 2 is another side cross-sectional view of a motor according to an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of a stator structure according to an embodiment of the present application;

[0022] Figure 4 is an exploded view of a stator structure according to an embodiment of the present application;

[0023] Figure 5is a side view of a core body according to an embodiment of the present application;

[0024] Figure 6 is a side view of a first core sheet according to an embodiment of the present application;

[0025] Figure 7 is a side view of a second core sheet according to an embodiment of the present application;

[0026] Figure 8 is a side view of a third core sheet according to an embodiment of the present application;

[0027] Figure 9 is a side view of a fourth core sheet according to an embodiment of the present application;

[0028] Figure 10 It is a schematic diagram of the coordinated assembly of the stator structure and the fuel injection ring according to an embodiment of the present application.

[0029] Reference numerals:

[0030] Motor 1,

[0031] stator structure 100,

[0032] Stator core 10, cooling oil passage 11, yoke oil passage 111, oil inlet 1111, tooth oil passage 112, oil outlet 1121, connecting oil passage 113, first end 12, second end 13, core body 14, third oil hole 141, sixth oil hole 142, ninth oil hole 143, twelfth oil hole 144, fifth core sheet 145, first core sheet 15, first oil hole 151, fourth oil hole 152 , the second oil-free hole yoke 153, the second oil-free hole tooth portion 154, the second core sheet 16, the second oil hole 161, the fifth oil hole 162, the second connecting oil hole 163, the third core sheet 17, the seventh oil hole 171, the tenth oil hole 172, the first oil-free hole yoke 173, the first oil-free hole tooth portion 174, the fourth core sheet 18, the eighth oil hole 181, the eleventh oil hole 182, the first connecting oil hole 183,

[0033] The first type of cooling oil passage 21, the second type of cooling oil passage 22,

[0034] stator teeth 31, stator slots 32,

[0035] Housing 200, housing side wall 210, oil inlet 220,

[0036] Injection ring 300,

[0037] Winding coil 410 , end winding 420 . DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] Reference below Figures 1-10 A stator structure 100 of a motor 1 according to an embodiment of the present invention is described. The stator structure 100 can be mounted on the motor 1 .

[0040] The stator structure 100 of the motor 1 according to the first embodiment of the present invention is as follows: Figures 1-10 As shown, the stator structure 100 of the motor 1 may include: a stator core 10, which is annular and has a plurality of cooling oil channels 11 formed therein. The plurality of cooling oil channels 11 are arranged in sequence along the circumference of the stator core 10, and the cooling oil channels 11 include a yoke oil channel 111 and a tooth oil channel 112. The yoke oil channel 111 and the tooth oil channel 112 both extend along the axial direction of the stator core 10. The yoke oil channel 111 and the tooth oil channel 112 are arranged along the radial direction of the stator core 10, and the yoke oil channel 111 and the tooth oil channel 112 are connected. The yoke oil channel 111 has an oil inlet 1111, and the tooth oil channel 112 has an oil outlet 1121. Along the axial direction of the stator core 10, the oil inlet 1111 and the oil outlet 1121 of the same cooling oil channel 11 are located at the same end of the stator core 10.

[0041] It should be noted that the stator structure of the existing motor cannot cool the yoke and teeth of the stator core at the same time, and the stator core is cooled unevenly, resulting in poor heat dissipation effect and low heat dissipation efficiency of the stator core, affecting the working efficiency of the motor.

[0042] Based on this, an embodiment of the present application proposes a stator structure 100 of a motor 1. The stator structure 100 may include a stator core 10. The stator core 10 may be constructed in a ring shape, and the cross-section of the stator core 10 may be constructed in a circular shape. The stator core 10 may be formed with a plurality of cooling oil channels 11. The plurality of cooling oil channels 11 may be arranged in sequence along the circumference of the stator core 10, and the spacing distance between any two adjacent cooling oil channels 11 may be equal. Cooling oil may flow in the cooling oil channels 11, and the cooling oil may directly exchange heat with the stator core 10, thereby achieving the effect of cooling the stator core 10. The advantage of using oil cooling is that the cooling oil can directly contact the heating parts of the motor 1, and the heat dissipation effect is relatively good. In addition, the cooling oil may have the characteristics of good thermal conductivity, good insulation, low freezing point, high boiling point, etc., so that the cooling effect of the motor 1 is better.

[0043] The cooling oil channel 11 may include a yoke oil channel 111 and a tooth oil channel 112, that is, there may be multiple yoke oil channels 111 and tooth oil channels 112, and the yoke oil channels 111 and the tooth oil channels 112 may both extend along the axial direction of the stator core 10. The yoke oil channels 111 and the tooth oil channels 112 of each cooling oil channel 11 may be arranged in parallel with each other, and the yoke oil channels 111 and the corresponding tooth oil channels 112 may be arranged along the radial direction of the stator core 10. The yoke oil channels 111 may be located on the side of the stator core 10 away from the central axis of the stator core 10 along the radial direction of the stator core 10, and the tooth oil channels 112 may be located on the side of the stator core 10 close to the central axis of the stator core 10 along the radial direction of the stator core 10. The yoke oil channels 111 and the tooth oil channels 112 may be arranged opposite to each other and spaced apart along the radial direction of the stator core 10. The yoke oil passage 111 and the tooth oil passage 112 can be connected, and multiple yoke oil passages 111 and multiple tooth oil passages 112 can be connected one by one, and each yoke oil passage 111 has a corresponding tooth oil passage 112 connected thereto.

[0044] The yoke oil passage 111 may have an oil inlet 1111, which may be configured as the inlet of the corresponding cooling oil passage 11. The tooth oil passage 112 may have an oil outlet 1121, which may be configured as the outlet of the corresponding cooling oil passage 11. Cooling oil may enter the yoke oil passage 111 from the oil inlet 1111, flow through the yoke oil passage 111 and the tooth oil passage 112, and then flow out of the tooth oil passage 112 from the oil outlet 1121. The cooling oil may exchange heat with the yoke and teeth of the stator core 10, directly cooling the yoke and teeth of the stator core 10, thereby improving the heat dissipation capacity of the stator core 10. Along the axial direction of the stator core 10, the oil inlet 1111 and the oil outlet 1121 of the same cooling oil channel 11 are located at the same end of the stator core 10, that is, the cooling oil can flow into the cooling oil channel 11 from one end of the stator core 10, and the cooling oil can flow out of the cooling oil channel 11 from the same end of the stator core 10. By arranging the oil inlet 1111 and the oil outlet 1121 of the same cooling oil channel 11 at the same end of the stator core 10 along the axial direction of the stator core 10, the flow path of the cooling oil in the stator core 10 can be extended, so that the cooling oil can take away more heat from the stator core 10, and the heat dissipation effect of the stator core 10 can be improved.

[0045] The end of the yoke oil passage 111 that faces away from the oil inlet 1111 along the axial direction of the stator core 10 can be connected to the tooth oil passage 112. The portion of the yoke oil passage 111 near the oil inlet 1111 can be denoted as the upstream portion of the yoke oil passage 111, and the portion where the yoke oil passage 111 and the tooth oil passage 112 connect can be denoted as the downstream portion of the yoke oil passage 111. The end of the tooth oil passage 112 that faces away from the oil outlet 1121 along the axial direction of the stator core 10 can be connected to the yoke oil passage 111. The portion where the tooth oil passage 112 and the yoke oil passage 111 connect can be denoted as the upstream portion of the tooth oil passage 112, and the portion of the tooth oil passage 112 near the oil outlet 1121 can be denoted as the downstream portion of the tooth oil passage 112. The upstream of the yoke oil passage 111 and the downstream of the tooth oil passage 112 can be located on the same side of the stator core 10 along the axial direction of the stator core 10, and the downstream of the yoke oil passage 111 and the upstream of the tooth oil passage 112 can be located on the same side of the stator core 10 along the axial direction of the stator core 10.

[0046] When low-temperature cooling oil enters the yoke oil channel 111 through the oil inlet 1111, the cooling oil exchanges heat with the stator core 10 in the yoke oil channel 111, and the temperature of the cooling oil continues to rise. The temperature of the cooling oil downstream of the yoke oil channel 111 is higher than the temperature of the cooling oil upstream of the yoke oil channel 111. The cooling effect of the cooling oil on the stator core 10 upstream of the yoke oil channel 111 is stronger than the cooling effect of the cooling oil on the stator core 10 downstream of the yoke oil channel 111. When the cooling oil flows into the tooth oil passage 112, the cooling oil continues to exchange heat with the stator core 10 in the tooth oil passage 112, and the temperature of the cooling oil further increases. The temperature of the cooling oil upstream of the tooth oil passage 112 is lower than the temperature of the cooling oil downstream of the tooth oil passage 112. The cooling effect of the cooling oil on the stator core 10 upstream of the tooth oil passage 112 is stronger than the cooling effect of the cooling oil on the stator core 10 downstream of the tooth oil passage 112.

[0047] After the cooling oil flows through the cooling oil channel 11, the temperature of the stator core 10 located upstream of the corresponding yoke oil channel 111 is lower, and the temperature of the stator core 10 located downstream of the corresponding tooth oil channel 112 is higher. The temperatures of the stator core 10 located downstream of the corresponding yoke oil channel 111 and the stator core 10 located upstream of the corresponding tooth oil channel 112 are moderate. The high-temperature stator core 10 located downstream of the tooth oil channel 112 can transfer heat to the low-temperature stator core 10 located upstream of the yoke oil channel 111, so that the temperature distribution of the stator core 10 is uniform, which is beneficial to uniform cooling of the stator core 10, improving the heat dissipation efficiency of the stator core 10, improving the cooling effect of the stator core 10, and improving the working efficiency of the motor 1.

[0048] In the embodiment of the present application, by providing a cooling oil channel 11 having a connected yoke oil channel 111 and a tooth oil channel 112, the cooling oil can directly cool the yoke and tooth of the stator core 10, thereby achieving the effect of direct heat exchange between the cooling oil and the stator core 10, which is beneficial to improving the heat dissipation capacity of the stator core 10, enabling the stator core 10 to withstand higher magnetic loads and operating frequencies, and is beneficial to improving the power density of the motor 1. Furthermore, by providing the oil inlet 1111 and the oil outlet 1121 of the same cooling oil channel 11 at the same end of the stator core 10 along the axial direction of the stator core 10, the stator core 10 can be cooled evenly, which is beneficial to improving the heat dissipation efficiency of the stator core 10, improving the cooling effect of the stator core 10, and improving the working efficiency of the motor 1.

[0049] As an example, the inner circumferential wall of the stator core 10 may be formed with a plurality of stator teeth 31, each of which extends axially along the stator core 10. The plurality of stator teeth 31 may be spaced apart circumferentially along the stator core 10, with the spacing between any two adjacent stator teeth 31 being equal. The plurality of stator teeth 31 may be evenly distributed circumferentially along the stator core 10. Stator slots 32 are formed between any two adjacent stator teeth 31. There may be multiple stator slots 32, which may be used to accommodate winding coils 410. Along the axial direction of the stator core 10, the winding coils 410 have end windings 420 that protrude from both ends of the stator core 10.

[0050] The oil outlet 1121 of the tooth oil channel 112 can be arranged corresponding to the end winding 420 of the stator structure 100 along the axial direction of the stator core 10. The cooling oil flowing out of the oil outlet 1121 of the tooth oil channel 112 can be sprayed to the end winding 420 of the stator structure 100, which is beneficial to further improve the heat dissipation effect of the stator structure 100.

[0051] In some embodiments of the present invention, Figure 1 As shown, the cooling oil passage 11 may further include a connecting oil passage 113 , which is connected between the yoke oil passage 111 and the gear oil passage 112 so that the yoke oil passage 111 and the gear oil passage 112 are connected in series.

[0052] A connecting oil passage 113 may be provided between the yoke oil passage 111 and the tooth oil passage 112. The connecting oil passage 113 may be connected to both the yoke oil passage 111 and the tooth oil passage 112. The yoke oil passage 111 and the tooth oil passage 112 may be connected in series. Cooling oil may enter the yoke oil passage 111 from the oil inlet 1111. After the cooling oil flows through the yoke oil passage 111, the connecting oil passage 113, and the tooth oil passage 112, the cooling oil flows out of the tooth oil passage 112 from the oil outlet 1121. The cooling oil passage 11 may be constructed in a U-shape or similar to a U-shape. By providing the connecting oil passage 113, the structure of the cooling oil passage 11 may be simplified, the connection between the yoke oil passage 111 and the tooth oil passage 112 may be simplified, the efficiency of the cooling oil flowing from the yoke oil passage 111 to the tooth oil passage 112 may be improved, and the heat dissipation efficiency of the stator core 10 may be further improved.

[0053] In some embodiments of the present invention, Figure 1 As shown, the communication oil passage 113 extends in the radial direction of the stator core 10 .

[0054] The yoke oil channel 111 and the tooth oil channel 112 are arranged along the radial direction of the stator core 10, and the connecting oil channel 113 can extend along the radial direction of the stator core 10, which is conducive to making the length of the connecting oil channel 113 smaller, and is conducive to further simplifying the structure of the cooling oil channel 11, and is conducive to further simplifying the connection method between the yoke oil channel 111 and the tooth oil channel 112, and is conducive to further improving the efficiency of the cooling oil flowing from the yoke oil channel 111 to the tooth oil channel 112, and is conducive to further improving the heat dissipation efficiency of the stator core 10.

[0055] In some embodiments of the present invention, Figure 1 As shown, the multiple cooling oil channels 11 may include: a first type of cooling oil channel 21 and a second type of cooling oil channel 22. Along the axial direction of the stator core 10, the stator core 10 has a first end 12 and a second end 13. The oil inlet 1111 and the oil outlet 1121 of the first type of cooling oil channel 21 are located at the first end 12 of the stator core 10, and the oil inlet 1111 and the oil outlet 1121 of the second type of cooling oil channel 22 are located at the second end 13 of the stator core 10.

[0056] The stator core 10 has a first end 12 and a second end 13 along the axial direction of the stator core 10. The first end 12 and the second end 13 of the stator core 10 can be arranged opposite each other along the axial direction of the stator core 10. The oil inlet 1111 and the oil outlet 1121 of the first-type cooling oil channel 21 are located at the first end 12 of the stator core 10. That is, cooling oil can enter the first-type cooling oil channel 21 from the first end 12 of the stator core 10 and flow out of the first end 12 of the stator core 10. The oil inlet 1111 and the oil outlet 1121 of the second-type cooling oil channel 22 can be located at the second end 13 of the stator core 10. That is, cooling oil can enter the second-type cooling oil channel 22 from the second end 13 of the stator core 10 and flow out of the second end 13 of the stator core 10. The first and second cooling oil passages 21, 22 are spaced apart from each other and are not connected. Providing oil inlets 1111 on both sides of the stator core 10 along the axial direction effectively reduces oil resistance within the cooling oil passages 11, thereby reducing the power, cost, and energy consumption of the oil pump.

[0057] The flow direction of the cooling oil in the first type cooling oil channel 21 is opposite to the flow direction of the cooling oil in the second type cooling oil channel 22. The upstream of the yoke oil channel 111 of the first type cooling oil channel 21 can be arranged corresponding to the downstream of the yoke oil channel 111 of the second type cooling oil channel 22 along the circumferential direction of the stator core 10. The downstream of the yoke oil channel 111 of the second type cooling oil channel 22 can transfer heat to the upstream of the yoke oil channel 111 of the first type cooling oil channel 21. The downstream of the yoke oil channel 111 of the first type cooling oil channel 21 can be arranged corresponding to the upstream of the yoke oil channel 111 of the second type cooling oil channel 22 along the circumferential direction of the stator core 10. The downstream of the yoke oil channel 111 of the first type cooling oil channel 21 can transfer heat to the upstream of the yoke oil channel 111 of the second type cooling oil channel 22. The same applies to the tooth oil passages 112. The upstream of the tooth oil passages 112 of the first type cooling oil passages 21 can be arranged correspondingly to the downstream of the tooth oil passages 112 of the second type cooling oil passages 22 along the circumferential direction of the stator core 10. The downstream of the tooth oil passages 112 of the second type cooling oil passages 22 can transfer heat to the upstream of the tooth oil passages 112 of the first type cooling oil passages 21. The downstream of the tooth oil passages 112 of the first type cooling oil passages 21 can be arranged correspondingly to the upstream of the tooth oil passages 112 of the second type cooling oil passages 22 along the circumferential direction of the stator core 10. The downstream of the tooth oil passages 112 of the first type cooling oil passages 21 can transfer heat to the upstream of the tooth oil passages 112 of the second type cooling oil passages 22. By providing the cooling oil channel 11 including the first type of cooling oil channel 21 and the second type of cooling oil channel 22, the stator core 10 can be further cooled evenly, which is beneficial to further make the temperature distribution of the stator core 10 even, which is beneficial to further improve the heat dissipation efficiency of the stator core 10, which is beneficial to further improve the cooling effect of the stator core 10, and which is beneficial to further improve the working efficiency of the motor 1.

[0058] In some embodiments of the present invention, Figure 1 and Figure 4 As shown, at least one of the two adjacent cooling oil passages 11 is a first-type cooling oil passage 21 , and the other is a second-type cooling oil passage 22 .

[0059] At least one of the two adjacent cooling oil channels 11 is a first-type cooling oil channel 21, and the other is a second-type cooling oil channel 22. The first-type cooling oil channel 21 and the second-type cooling oil channel 22 can be arranged along the circumference of the stator core 10. Heat can be transferred between the first-type cooling oil channel 21 and the second-type cooling oil channel 22, which is beneficial to further uniformly cool the stator core 10, further improve the heat dissipation efficiency of the stator core 10, further improve the cooling effect of the stator core 10, and further improve the working efficiency of the motor 1. As an example, there can be multiple first-class cooling oil channels 21, and there can be multiple second-class cooling oil channels 22. The number of first-class cooling oil channels 21 and second-class cooling oil channels 22 can be the same. One of any two adjacent cooling oil channels 11 can be a first-class cooling oil channel 21, and the other can be a second-class cooling oil channel 22. Multiple first-class cooling oil channels 21 and multiple second-class cooling oil channels 22 can be staggered in sequence along the circumference of the stator core 10. Each first-class cooling oil channel 21 is provided with a second-class cooling oil channel 22 on both sides of the circumference of the stator core 10, and each second-class cooling oil channel 22 is provided with a first-class cooling oil channel 21 on both sides of the circumference of the stator core 10, which is conducive to further uniform cooling of the stator core 10, further improving the heat dissipation efficiency of the stator core 10, further improving the cooling effect of the stator core 10, and further improving the working efficiency of the motor 1.

[0060] In some embodiments of the present invention, Figure 3-Figure 9As shown, the stator core 10 may include: a core body 14, a first core sheet 15, a second core sheet 16, a third core sheet 17 and a fourth core sheet 18. Along the axial direction of the stator core 10, the first core sheet 15 and the second core sheet 16 are located on one side of the core body 14, the second core sheet 16 is located between the first core sheet 15 and the core body 14, the third core sheet 17 and the fourth core sheet 18 are located on the other side of the core body 14, and the fourth core sheet 18 is located between the third core sheet 17 and the core body 14; the first core sheet 15 is formed with a first oil hole 151, the second core sheet 16 is formed with a second oil hole 161, and the core body 14 is formed with a third oil hole 141. The first oil hole 151, the second oil hole 161 and the third oil hole 141 are arranged in a one-to-one correspondence to form the yoke oil channel 111 of the first type cooling oil channel 21, the first core sheet 15 is formed with a fourth oil hole 152, the second oil hole 153 is formed with a fourth oil hole 154, and the fourth oil hole 155 is formed with a fourth oil hole 156. The second core sheet 16 is formed with a fifth oil hole 162, the core body 14 is formed with a sixth oil hole 142, the fourth oil hole 152, the fifth oil hole 162 and the sixth oil hole 142 are arranged one by one to form the tooth oil channel 112 of the first type cooling oil channel 21; the third core sheet 17 is formed with a seventh oil hole 171, the fourth core sheet 18 is formed with an eighth oil hole 181, the core body 14 is formed with a ninth oil hole 143, the seventh oil hole 171, the eighth oil hole 181 and the ninth oil hole 181. The oil hole 181 and the ninth oil hole 143 are arranged in a one-to-one correspondence to form the yoke oil channel 111 of the second type of cooling oil channel 22, the third core sheet 17 is formed with a tenth oil hole 172, the fourth core sheet 18 is formed with an eleventh oil hole 182, and the core body 14 is formed with a twelfth oil hole 144. The tenth oil hole 172, the eleventh oil hole 182 and the twelfth oil hole 144 are arranged in a one-to-one correspondence to form the tooth oil channel 112 of the second type of cooling oil channel 22.

[0061] like Figure 3 and Figure 4 As shown, the first core sheet 15, the second core sheet 16, the core body 14, the fourth core sheet 18, and the third core sheet 17 can be sequentially arranged along the axial direction of the stator core 10. The first core sheet 15, the second core sheet 16, the core body 14, the fourth core sheet 18, and the third core sheet 17 can be stacked along the axial direction of the stator core 10. Along the axial direction of the stator core 10, the first core sheet 15 and the second core sheet 16 can be located on one side of the core body 14. The first core sheet 15 and the second core sheet 16 can be provided at the first end 12 of the stator core 10, and the second core sheet 16 can be located between the first core sheet 15 and the core body 14. The third core piece 17 and the fourth core piece 18 can be located on the other side of the core body 14 . The third core piece 17 and the fourth core piece 18 can be provided at the second end 13 of the stator core 10 . The fourth core piece 18 can be located between the third core piece 17 and the core body 14 .

[0062] like Figure 5-Figure 7As shown, the first core sheet 15 may be formed with a first oil hole 151. The first oil hole 151 may penetrate the first core sheet 15 along the thickness direction of the first core sheet 15. There may be a plurality of first oil holes 151. The plurality of first oil holes 151 may be spaced apart and arranged along the circumference of the first core sheet 15 (i.e., the circumference of the stator core 10). The plurality of first oil holes 151 may be evenly arranged along the circumference of the first core sheet 15. The second core sheet 16 may be formed with a second oil hole 161. The second oil hole 161 may penetrate the second core sheet 16 along the thickness direction of the second core sheet 16. There may be a plurality of second oil holes 161. The plurality of second oil holes 161 may be spaced apart and arranged along the circumference of the second core sheet 16 (i.e., the circumference of the stator core 10). The plurality of second oil holes 161 may be evenly arranged along the circumference of the second core sheet 16. The core body 14 is formed with a third oil hole 141, which can penetrate the core body 14 along the thickness direction of the core body 14. There can be multiple third oil holes 141, and the multiple third oil holes 141 can be spaced apart and arranged along the circumference of the core body 14 (that is, the circumference of the stator core 10). The multiple third oil holes 141 can be evenly arranged along the circumference of the core body 14.

[0063] The number of the first oil holes 151, the second oil holes 161 and the third oil holes 141 can be the same, and the first oil holes 151, the second oil holes 161 and the third oil holes 141 can be arranged one by one along the arrangement direction of the first iron core sheet 15, the second iron core sheet 16 and the iron core body 14 (that is, the axial direction of the stator core 10), and each first oil hole 151 has a second oil hole 161 and a third oil hole 141 arranged corresponding thereto, and the first oil holes 151, the second oil holes 161 and the third oil holes 141 can jointly form the yoke oil channel 111 of the first type cooling oil channel 21.

[0064] like Figure 5-Figure 7As shown, the first core sheet 15 may be formed with a fourth oil hole 152. The fourth oil hole 152 may be spaced apart from the first oil hole 151 in the radial direction of the first core sheet 15. The fourth oil hole 152 may penetrate the first core sheet 15 along the thickness direction of the first core sheet 15. There may be multiple fourth oil holes 152. The multiple fourth oil holes 152 may be spaced apart along the circumference of the first core sheet 15. The multiple fourth oil holes 152 may be evenly arranged along the circumference of the first core sheet 15. The second core sheet 16 may be formed with a fifth oil hole 162. The fifth oil hole 162 may be spaced apart from the second oil hole 161 in the radial direction of the second core sheet 16. The fifth oil hole 162 can penetrate the second core sheet 16 along the thickness direction of the second core sheet 16. There can be a plurality of fifth oil holes 162. The plurality of fifth oil holes 162 can be spaced apart along the circumference of the second core sheet 16. The plurality of fifth oil holes 162 can be evenly distributed along the circumference of the second core sheet 16. The core body 14 is formed with a sixth oil hole 142. The sixth oil hole 142 can be spaced apart from the third oil hole 141 in the radial direction of the core body 14. The sixth oil hole 142 can penetrate the core body 14 along the thickness direction of the core body 14. There can be a plurality of sixth oil holes 142. The plurality of sixth oil holes 142 can be spaced apart along the circumference of the core body 14. The plurality of sixth oil holes 142 can be evenly distributed along the circumference of the core body 14.

[0065] The number of the fourth oil hole 152, the fifth oil hole 162 and the sixth oil hole 142 can be the same. The fourth oil holes 152, the fifth oil holes 162 and the sixth oil holes 142 can be arranged one by one along the arrangement direction of the first iron core sheet 15, the second iron core sheet 16 and the iron core body 14. Each fourth oil hole 152 has a fifth oil hole 162 and a sixth oil hole 142 arranged corresponding to it. The fourth oil holes 152, the fifth oil holes 162 and the sixth oil holes 142 can jointly form the tooth oil channel 112 of the first type cooling oil channel 21.

[0066] like Figure 5 、 Figure 8 and Figure 9As shown, the third core sheet 17 is formed with a seventh oil hole 171. The seventh oil hole 171 can penetrate the third core sheet 17 along the thickness direction of the third core sheet 17. There can be a plurality of seventh oil holes 171. The plurality of seventh oil holes 171 can be spaced apart and arranged along the circumference of the third core sheet 17 (i.e., the circumference of the stator core 10). The plurality of seventh oil holes 171 can be evenly arranged along the circumference of the third core sheet 17. The fourth core sheet 18 is formed with an eighth oil hole 181. The eighth oil hole 181 can penetrate the fourth core sheet 18 along the thickness direction of the fourth core sheet 18. There can be a plurality of eighth oil holes 181. The plurality of eighth oil holes 181 can be spaced apart and arranged along the circumference of the fourth core sheet 18 (i.e., the circumference of the stator core 10). The plurality of eighth oil holes 181 can be evenly arranged along the circumference of the fourth core sheet 18. The core body 14 is formed with a ninth oil hole 143, which can penetrate the core body 14 along the thickness direction of the core body 14. There can be multiple ninth oil holes 143, and multiple ninth oil holes 143 can be arranged at intervals along the circumference of the core body 14 (that is, the circumference of the stator core 10). Multiple ninth oil holes 143 can be evenly arranged along the circumference of the core body 14.

[0067] The number of the seventh oil hole 171, the eighth oil hole 181 and the ninth oil hole 143 can be the same. The seventh oil hole 171, the eighth oil hole 181 and the ninth oil hole 143 can be arranged one by one along the arrangement direction of the third core sheet 17, the fourth core sheet 18 and the core body 14 (that is, the axial direction of the stator core 10). Each seventh oil hole 171 has an eighth oil hole 181 and a ninth oil hole 143 arranged corresponding thereto. The seventh oil hole 171, the eighth oil hole 181 and the ninth oil hole 143 can jointly form the yoke oil channel 111 of the second type cooling oil channel 22.

[0068] like Figure 5 、 Figure 8 and Figure 9As shown, the third core sheet 17 may be formed with a tenth oil hole 172. The tenth oil hole 172 may be spaced apart from the seventh oil hole 171 in the radial direction of the third core sheet 17. The tenth oil hole 172 may penetrate the third core sheet 17 along the thickness direction of the third core sheet 17. There may be a plurality of tenth oil holes 172. The plurality of tenth oil holes 172 may be spaced apart along the circumference of the third core sheet 17. The plurality of tenth oil holes 172 may be evenly spaced along the circumference of the third core sheet 17. The fourth core sheet 18 may be formed with an eleventh oil hole 182. The eleventh oil hole 182 may be spaced apart from the eighth oil hole 181 in the radial direction of the fourth core sheet 18. The eleventh oil hole 182 can penetrate the fourth core sheet 18 along the thickness direction of the fourth core sheet 18. There can be a plurality of eleventh oil holes 182. The plurality of eleventh oil holes 182 can be spaced apart along the circumference of the fourth core sheet 18. The plurality of eleventh oil holes 182 can be evenly spaced along the circumference of the fourth core sheet 18. The core body 14 is formed with a twelfth oil hole 144. The twelfth oil hole 144 can be spaced apart from the ninth oil hole 143 in the radial direction of the core body 14. The twelfth oil hole 144 can penetrate the core body 14 along the thickness direction of the core body 14. There can be a plurality of twelfth oil holes 144. The plurality of twelfth oil holes 144 can be spaced apart along the circumference of the core body 14. The plurality of twelfth oil holes 144 can be evenly spaced along the circumference of the core body 14.

[0069] The number of the tenth oil hole 172, the eleventh oil hole 182 and the twelfth oil hole 144 can be the same. The tenth oil hole 172, the eleventh oil hole 182 and the twelfth oil hole 144 can be arranged one by one along the arrangement direction of the third iron core sheet 17, the fourth iron core sheet 18 and the iron core body 14. Each tenth oil hole 172 has an eleventh oil hole 182 and a twelfth oil hole 144 arranged corresponding to it. The tenth oil hole 172, the eleventh oil hole 182 and the twelfth oil hole 144 can jointly form the tooth oil channel 112 of the second type cooling oil channel 22.

[0070] The first core sheet 15, the second core sheet 16 and the core body 14 can jointly define the yoke oil channel 111 and the tooth oil channel 112 of the first type of cooling oil channel 21, and the third core sheet 17, the fourth core sheet 18 and the core body 14 can jointly define the yoke oil channel 111 and the tooth oil channel 112 of the second type of cooling oil channel 22. The first core sheet 15 and the second core sheet 16 are located on one side of the core body 14, and the third core sheet 17 and the fourth core sheet 18 are located on the other side of the core body 14, which is conducive to further achieving the effect of opposite flow directions of the cooling oil in the first type of cooling oil channel 21 and the second type of cooling oil channel 22, which is conducive to further uniform cooling of the stator core 10, further improving the heat dissipation efficiency of the stator core 10, further improving the cooling effect of the stator core 10, and further improving the working efficiency of the motor 1.

[0071] As an example, the core body 14 can be composed of multiple fifth core sheets 145, and the multiple fifth core sheets 145 can be arranged in sequence along the axial direction of the core body 14, and the third oil holes 141, sixth oil holes 142, ninth oil holes 143 and twelfth oil holes 144 of the multiple fifth core sheets 145 can be arranged one by one along the arrangement direction of the multiple fifth core sheets 145, so that the multiple fifth core sheets 145 can jointly define the yoke oil channel 111 of the first type of cooling oil channel 21, the tooth oil channel 112 of the first type of cooling oil channel 21, the yoke oil channel 111 of the second type of cooling oil channel 22 and the tooth oil channel 112 of the second type of cooling oil channel 22 with the first core sheet 15, the second core sheet 16, the third core sheet 17 and the fourth core sheet 18.

[0072] In some embodiments of the present invention, Figure 4-Figure 9 As shown, the fourth core sheet 18 is formed with a first connecting oil hole 183, the first connecting oil hole 183 extends along the radial direction of the fourth core sheet 18 and is constructed as part of the corresponding cooling oil channel 11, and the first connecting oil hole 183 connects the third oil hole 141 and the sixth oil hole 142; and / or the second core sheet 16 is formed with a second connecting oil hole 163, the second connecting oil hole 163 extends along the radial direction of the second core sheet 16 and is constructed as part of the corresponding cooling oil channel 11, and the second connecting oil hole 163 connects the ninth oil hole 143 and the twelfth oil hole 144.

[0073] The fourth core sheet 18 may be formed with a first communicating oil hole 183, which may be configured as part of the corresponding cooling oil passage 11, or the second core sheet 16 may be formed with a second communicating oil hole 163, which may be configured as part of the corresponding cooling oil passage 11, or the fourth core sheet 18 may be formed with a first communicating oil hole 183, which may be configured as part of the corresponding cooling oil passage 11, and the second core sheet 16 may be formed with a second communicating oil hole 163, which may be configured as part of the corresponding cooling oil passage 11. The embodiment of the present application is described by taking as an example the case where the fourth core sheet 18 is formed with a first communicating oil hole 183, which may be configured as part of the corresponding cooling oil passage 11, and the second core sheet 16 is formed with a second communicating oil hole 163, which may be configured as part of the corresponding cooling oil passage 11.

[0074] The tooth oil passages 112 and yoke oil passages 111 of the first type cooling oil passages 21 are connected, and the connecting oil passages 113 are connected between the corresponding yoke oil passages 111 and the corresponding tooth oil passages 112. The fourth core lamination 18 is formed with a first connecting oil hole 183. The first connecting oil hole 183 can penetrate the fourth core lamination 18 along the thickness direction of the fourth core lamination 18. The first connecting oil hole 183 can extend in the radial direction of the fourth core lamination 18. The first connecting oil hole 183 can connect the corresponding third oil hole 141 and the corresponding sixth oil hole 142. The first connecting oil hole 183 can connect the yoke oil passage 111 and the tooth oil passage 112 of the corresponding first type cooling oil passage 21. The first connecting oil hole 183 can be configured as part of the corresponding cooling oil passage 11. There may be a plurality of first communicating oil holes 183 , and the plurality of first communicating oil holes 183 may be spaced apart and arranged along the circumference of the fourth core sheet 18 . The plurality of first communicating oil holes 183 may be evenly arranged along the circumference of the fourth core sheet 18 . A portion of the first communicating oil hole 183 may be provided between any two adjacent eighth oil holes 181 , and a portion of the first communicating oil hole 183 may be provided between any two adjacent eleventh oil holes 182 . The first communicating oil hole 183 is spaced apart from both the eighth oil hole 181 and the eleventh oil hole 182 .

[0075] As an example, Figure 8 As shown, a first oil-free yoke 173 can be provided between any two adjacent seventh oil holes 171 on the third core sheet 17, and a first oil-free tooth 174 can be provided between any two adjacent tenth oil holes 172 on the third core sheet 17. The first oil-free yoke 173 can be arranged opposite to a portion of the first connecting oil hole 183 along the axial direction of the stator core 10, and the first oil-free tooth 174 can be arranged opposite to a portion of the first connecting oil hole 183 along the axial direction of the stator core 10. The third core sheet 17 can cover the first connecting oil hole 183 along the axial direction of the stator core 10, so that the first connecting oil hole 183 can jointly construct a connecting oil channel 113 with the third core sheet 17 and the core body 14, which is beneficial for the cooling oil to flow from the corresponding yoke oil channel 111 to the corresponding tooth oil channel 112 through the connecting oil channel 113, thereby improving the reliability of the cooling oil channel 11.

[0076] The tooth oil passages 112 and yoke oil passages 111 of the second type cooling oil passages 22 communicate with each other, and a communication oil passage 113 connects the corresponding yoke oil passage 111 and tooth oil passage 112. The second core lamination 16 is formed with a second communication oil hole 163. The second communication oil hole 163 can penetrate the second core lamination 16 along its thickness. The second communication oil hole 163 can extend radially in the second core lamination 16 and connect with the ninth oil hole 143 and the twelfth oil hole 144. The second communication oil hole 163 can connect the yoke oil passage 111 and tooth oil passage 112 of the corresponding second type cooling oil passage 22. The second communication oil hole 163 can be configured as part of the corresponding cooling oil passage 11. There can be multiple second communication oil holes 163, which can be spaced apart and evenly distributed along the circumference of the second core lamination 16. A portion of the second connecting oil hole 163 may be provided between any two adjacent second oil holes 161 , and a portion of the second connecting oil hole 163 may be provided between any two adjacent fifth oil holes 162 . The second connecting oil hole 163 is separated from the second oil hole 161 and the fifth oil hole 162 .

[0077] As an example, a second oil-free yoke 153 can be provided between any two adjacent first oil holes 151 on the first core sheet 15, and a second oil-free tooth 154 can be provided between any two adjacent fourth oil holes 152 on the first core sheet 15. The second oil-free yoke 153 can be arranged opposite to a portion of the second connecting oil hole 163 along the axial direction of the stator core 10, and the second oil-free tooth 154 can be arranged opposite to a portion of the second connecting oil hole 163 along the axial direction of the stator core 10. The first core sheet 15 can cover the second connecting oil hole 163 along the axial direction of the stator core 10, so that the second connecting oil hole 163 can jointly construct a connecting oil channel 113 with the first core sheet 15 and the core body 14, which is beneficial for the cooling oil to flow from the corresponding yoke oil channel 111 to the corresponding tooth oil channel 112 through the connecting oil channel 113, thereby improving the reliability of the cooling oil channel 11.

[0078] In some embodiments of the present invention, Figure 4-Figure 9 As shown, the structure of the first core piece 15 is the same as that of the third core piece 17 ; and / or the structure of the second core piece 16 is the same as that of the fourth core piece 18 .

[0079] The structure of the first core sheet 15 can be the same as that of the third core sheet 17, or the structure of the second core sheet 16 can be the same as that of the fourth core sheet 18, or the structure of the first core sheet 15 is the same as that of the third core sheet 17, and the structure of the second core sheet 16 is the same as that of the fourth core sheet 18. The embodiment of the present application is described by taking the example that the structure of the first core sheet 15 is the same as that of the third core sheet 17, and the structure of the second core sheet 16 is the same as that of the fourth core sheet 18.

[0080] The structure of the first core sheet 15 and the structure of the third core sheet 17 can be the same. The diameter, location, and number of the first oil hole 151 on the first core sheet 15 and the seventh oil hole 171 on the third core sheet 17 can be the same. The diameter, location, and number of the fourth oil hole 152 on the first core sheet 15 and the tenth oil hole 172 on the third core sheet 17 can be the same. By making the structure of the first core sheet 15 and the structure of the third core sheet 17 the same, the difficulty of manufacturing and processing the stator core 10 can be reduced, which helps to reduce costs.

[0081] As an example, when the first core sheet 15 and the third core sheet 17 are both used to form the stator core 10, the first oil hole 151 of the first core sheet 15 and the seventh oil hole 171 of the third core sheet 17 need to be staggered along the circumferential direction of the stator core 10, and the first oil hole 151 of the first core sheet 15 can be arranged opposite to the first oil-hole-free yoke 173 of the third core sheet 17 along the axial direction of the stator core 10, and the fourth oil hole 152 of the first core sheet 15 can be arranged opposite to the first oil-hole-free tooth portion 174 of the third core sheet 17 along the axial direction of the stator core 10, which is conducive to the first oil hole 151, the second oil hole 161, the third oil hole 141, the first connecting oil hole 183, the sixth oil hole 142, the fifth oil hole 162 and the fourth oil hole 152 can jointly define the first type of cooling oil channel 21. The seventh oil hole 171 of the third core sheet 17 can be arranged relative to the second oil-hole-free yoke 153 of the first core sheet 15 along the axial direction of the stator core 10, and the tenth oil hole 172 of the third core sheet 17 can be arranged relative to the second oil-hole-free tooth portion 154 of the first core sheet 15 along the axial direction of the stator core 10, which is conducive to the seventh oil hole 171, the eighth oil hole 181, the ninth oil hole 143, the second connecting oil hole 163, the tenth oil hole 172, the eleventh oil hole 182 and the twelfth oil hole 144 to jointly define the second type of cooling oil channel 22.

[0082] The structure of the second core sheet 16 can be identical to that of the fourth core sheet 18. The diameter, location, and number of the second oil hole 161 on the second core sheet 16 and the eighth oil hole 181 on the fourth core sheet 18 can be identical. The diameter, location, and number of the fifth oil hole 162 on the second core sheet 16 and the eleventh oil hole 182 on the fourth core sheet 18 can be identical. By arranging the structures of the second core sheet 16 and the fourth core sheet 18 to be identical, the difficulty of manufacturing and processing the stator core 10 can be further reduced, which is conducive to further reducing costs.

[0083] As an example, when the second core sheet 16 and the fourth core sheet 18 are both used to form the stator core 10, the second oil hole 161 of the second core sheet 16 and the eighth oil hole 181 of the fourth core sheet 18 need to be staggered along the circumferential direction of the stator core 10, and the second oil hole 161 of the second core sheet 16 can be arranged opposite to the first connecting oil hole 183 of the fourth core sheet 18 along the axial direction of the stator core 10, and the fifth oil hole 162 of the second core sheet 16 can be arranged opposite to the first connecting oil hole 183 of the fourth core sheet 18 along the axial direction of the stator core 10, which is conducive to the first oil hole 151, the second oil hole 161, the third oil hole 141, the first connecting oil hole 183, the sixth oil hole 142, the fifth oil hole 162 and the fourth oil hole 152 can jointly define the first type of cooling oil channel 21. The eighth oil hole 181 of the fourth core sheet 18 can be arranged opposite to the second connecting oil hole 163 of the second core sheet 16 along the axial direction of the stator core 10, and the eleventh oil hole 182 of the fourth core sheet 18 can be arranged opposite to the second connecting oil hole 163 of the second core sheet 16 along the axial direction of the stator core 10, which is conducive to the seventh oil hole 171, the eighth oil hole 181, the ninth oil hole 143, the second connecting oil hole 163, the tenth oil hole 172, the eleventh oil hole 182 and the twelfth oil hole 144 to jointly define the second type of cooling oil channel 22.

[0084] In some embodiments of the present invention, Figure 5-Figure 9 As shown, at least a portion of the tooth oil passage 112 is located at the corresponding stator tooth 31 of the stator core 10 .

[0085] At least a portion of the tooth oil passage 112 can be located at the corresponding stator tooth 31 of the stator core 10, and at least a portion of the tooth oil passage 112 can be arranged opposite to and spaced apart from the stator slot 32 along the circumferential direction of the stator core 10. When the cooling oil flows through the tooth oil passage 112, the cooling oil in the tooth oil passage 112 can indirectly cool the winding coil 410 in the stator slot 32, which is beneficial to improving the current carrying capacity of the winding coil 410 in the stator slot 32, so that the winding coil 410 in the stator slot 32 can withstand higher current density and operating frequency, which is beneficial to further improve the heat dissipation efficiency of the stator core 10 and further improve the power density of the motor 1.

[0086] As an example, Figure 6 and Figure 8 As shown, on the first core sheet 15 and the third core sheet 17 , all of the tooth oil passages 112 may be located at the corresponding stator teeth 31 of the first core sheet 15 and the third core sheet 17 .

[0087] As another example, Figure 7 and Figure 9 As shown, on the second core sheet 16 and the fourth core sheet 18, portions of the tooth oil passages 112 can be located at the corresponding stator teeth 31 of the second core sheet 16 and the fourth core sheet 18, and the multiple stator teeth 31 of the second core sheet 16 can be alternately distributed with portions of the multiple corresponding tooth oil passages 112 along the circumference of the second core sheet 16, and the multiple stator teeth 31 of the fourth core sheet 18 can be alternately distributed with portions of the multiple corresponding tooth oil passages 112 along the circumference of the fourth core sheet 18.

[0088] As another example, Figure 5 As shown, on the core body 14 , part of the tooth oil passage 112 can be located at the corresponding stator teeth 31 of the core body 14 , and the multiple stator teeth 31 of the core body 14 can be alternately distributed with parts of the multiple corresponding tooth oil passages 112 along the circumference of the core body 14 .

[0089] The motor 1 according to the second embodiment of the present invention includes the stator structure 100 of the motor 1 in the above embodiment.

[0090] According to the motor 1 of the embodiment of the present application, the stator structure 100 of the motor 1 in the above embodiment is used to improve the power density of the motor 1 and the working efficiency of the motor 1.

[0091] In some embodiments of the present invention, Figure 1 、 Figure 2 and Figure 10 As shown, the motor 1 may further include: a casing 200, the stator structure 100 is arranged in the casing 200, and along the radial direction of the stator structure 100, the casing 200 has a casing side wall 210 opposite to the stator structure 100, and the casing side wall 210 is formed with a plurality of oil inlets 220, along the axial direction of the stator structure 100, part of the plurality of oil inlets 220 are located on one side of the stator structure 100, and another part of the plurality of oil inlets 220 are located on the other side of the stator structure 100.

[0092] like Figure 1As shown, the stator structure 100 can be disposed within a housing 200. Along the radial direction of the stator structure 100, the housing 200 has a housing sidewall 210 opposing the stator structure 100. The housing sidewall 210 can be disposed circumferentially around the stator core 10 and can form an interference fit with the stator structure 100. The housing sidewall 210 can be formed with a plurality of oil inlets 220, through which cooling oil can enter the interior of the motor 1 and flow toward the stator structure 100. Along the axial direction of the stator structure 100, some of the plurality of oil inlets 220 are located on one side of the stator structure 100, while another portion of the plurality of oil inlets 220 are located on the other side of the stator structure 100. Specifically, some of the plurality of oil inlets 220 can be located near the first end 12 of the stator core 10, while another portion of the plurality of oil inlets 220 can be located near the second end 13 of the stator core 10. The oil inlet 1111 and the oil outlet 1121 of the first type cooling oil channel 21 are located at the first end 12 of the stator core 10, and the oil inlet 1111 and the oil outlet 1121 of the second type cooling oil channel 22 are located at the second end 13 of the stator core 10. According to the principle of proximity, some of the multiple oil inlets 220 can be connected to the oil inlet 1111 of the first type cooling oil channel 21 in the multiple cooling oil channels 11, so that the cooling oil can flow into the first type cooling oil channel 21, and another part of the multiple oil inlets 220 can be connected to the oil inlet 1111 of the second type cooling oil channel 22 in the multiple cooling oil channels 11, so that the cooling oil can flow into the second type cooling oil channel 22.

[0093] By setting multiple oil inlets 220 on the casing 200, the distance that the cooling oil flows from the oil inlet 220 into the corresponding first-type cooling oil channel 21 and the corresponding second-type cooling oil channel 22 can be shortened, which is beneficial to further improve the heat dissipation efficiency of the stator structure 100, improve the heat dissipation effect of the stator structure 100, and further improve the working efficiency of the motor 1.

[0094] As an example, Figure 1 and Figure 10As shown, the motor 1 may further include an oil spray ring 300. There may be two oil spray rings 300, each mounted on the stator core 10 at both ends of the stator core 10 along the axial direction. The oil spray ring 300 is provided with oil spray holes, through which cooling oil can be sprayed onto the end windings 420 of the stator structure 100. This can cool the end windings 420 of the stator structure 100, further improving the heat dissipation effect and efficiency of the motor 1 and extending the service life of the motor 1. The oil injection ring 300 can form a connecting groove, which can extend along the circumference of the stator core 10. The connecting groove can connect the oil inlets 1111 of the yoke oil channels 111 of multiple first-type cooling oil channels 21 in parallel, so that the oil inlet pressures of the yoke oil channels 111 of multiple first-type cooling oil channels 21 are kept balanced. The connecting groove can connect the oil inlets 1111 of the yoke oil channels 111 of multiple second-type cooling oil channels 22 in parallel, so that the oil inlet pressures of the yoke oil channels 111 of multiple second-type cooling oil channels 22 are kept balanced.

[0095] In the embodiment of the present application, the cooling oil can enter the interior of the motor 1 through the oil inlet 220 located on the side close to the first end 12 of the stator core 10. A part of the cooling oil can fill the oil spray ring 300 and be sprayed along the radial direction of the stator core 10 through the oil spray hole of the corresponding oil spray ring 300 to the end winding 420 of the stator structure 100. The other part of the cooling oil flows into the yoke oil channel 111 of the corresponding first-type cooling oil channel 21 through the corresponding oil inlet 1111. The cooling oil flows from the first end 12 of the stator core 10 to a position close to the second end 13 of the stator core 10. The cooling oil flows through the connecting oil channel 113 and enters the corresponding tooth oil channel 112. The cooling oil flows from a position close to the second end 13 of the stator core 10 to the first end 12 of the stator core 10, and is finally sprayed from the corresponding oil outlet 1121 along the axial direction of the stator core 10 to the end winding 420 of the stator structure 100. The cooling oil can enter the interior of the motor 1 through the oil inlet 220 located on the side close to the second end 13 of the stator core 10. A part of the cooling oil can fill the oil spray ring 300 and be sprayed along the radial direction of the stator core 10 through the oil spray holes of the corresponding oil spray ring 300 to the end winding 420 of the stator structure 100. The other part of the cooling oil flows into the yoke oil channel 111 of the corresponding second type cooling oil channel 22 through the corresponding oil inlet 1111. The cooling oil flows from the second end 13 of the stator core 10 to the position close to the first end 12 of the stator core 10. The cooling oil flows through the connecting oil channel 113 and enters the corresponding tooth oil channel 112. The cooling oil flows from the position close to the first end 12 of the stator core 10 to the second end 13 of the stator core 10, and is finally sprayed from the corresponding oil outlet 1121 along the axial direction of the stator core 10 to the end winding 420 of the stator structure 100.

[0096] By setting the oil spray ring 300, the radial oil spraying of the oil spray ring 300 and the axial oil spraying of the tooth oil channel 112 of the stator core 10 are combined, which is beneficial to increasing the spray area of ​​the end winding 420 of the stator structure 100, and is beneficial to improving the heat transfer area and heat transfer coefficient between the end winding 420 and the cooling oil, and is beneficial to further enhance the heat dissipation effect of the end winding 420, and is beneficial to further enable the end winding 420 to withstand higher current density and operating frequency, and is beneficial to further improve the power density of the motor 1.

[0097] As an example, the stator structure 100 in the present application can be assembled in conjunction with a hollow shaft oil-swinging rotor, which is beneficial for further improving the heat dissipation effect of the winding ends of the stator structure 100.

[0098] The stator structure 100 of the motor 1 according to the embodiment of the present invention and other components and operations of the motor 1 are well known to those skilled in the art and will not be described in detail here.

[0099] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0100] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A stator structure of a motor, characterized in that: include: A stator core (10), wherein the stator core (10) is annular and is formed with a plurality of cooling oil passages (11), wherein the plurality of cooling oil passages (11) are sequentially spaced apart and arranged along the circumference of the stator core (10), wherein the cooling oil passages (11) include a yoke oil passage (111) and a tooth oil passage (112), wherein the yoke oil passage (111) and the tooth oil passage (112) both extend along the axial direction of the stator core (10), and the yoke oil passage (111) and the tooth oil passage (112) extend in the axial direction of the stator core (10). The tooth oil passage (112) is arranged along the radial direction of the stator core (10), and the yoke oil passage (111) and the tooth oil passage (112) are connected. The yoke oil passage (111) has an oil inlet (1111), and the tooth oil passage (112) has an oil outlet (1121). Along the axial direction of the stator core (10), the oil inlet (1111) and the oil outlet (1121) of the same cooling oil passage (11) are located at the same end of the stator core (10).

2. The stator structure of the motor according to claim 1, characterized in that: The cooling oil passage (11) further includes a communication oil passage (113), wherein the communication oil passage (113) is connected between the yoke oil passage (111) and the gear oil passage (112), so that the yoke oil passage (111) and the gear oil passage (112) are connected in series.

3. The stator structure of the motor according to claim 2, characterized in that: The communicating oil passage (113) extends in the radial direction of the stator core (10).

4. The stator structure of the motor according to claim 1, characterized in that: The plurality of cooling oil channels (11) include: a first type of cooling oil channel (21) and a second type of cooling oil channel (22); along the axial direction of the stator core (10), the stator core (10) has a first end (12) and a second end (13); the oil inlet (1111) and the oil outlet (1121) of the first type of cooling oil channel (21) are located at the first end (12) of the stator core (10); and the oil inlet (1111) and the oil outlet (1121) of the second type of cooling oil channel (22) are located at the second end (13) of the stator core (10).

5. The stator structure of the motor according to claim 4, characterized in that: At least one of the two adjacent cooling oil passages (11) is the first type of cooling oil passage (21), and the other is the second type of cooling oil passage (22).

6. The stator structure of the motor according to claim 4, characterized in that: The stator core (10) comprises: a core body (14), a first core sheet (15), a second core sheet (16), a third core sheet (17) and a fourth core sheet (18); along the axial direction of the stator core (10), the first core sheet (15) and the second core sheet (16) are located on one side of the core body (14), the second core sheet (16) is located between the first core sheet (15) and the core body (14), the third core sheet (17) and the fourth core sheet (18) are located on the other side of the core body (14), and the fourth core sheet (18) is located between the third core sheet (17) and the core body (14); The first core sheet (15) is formed with a first oil hole (151), the second core sheet (16) is formed with a second oil hole (161), the core body (14) is formed with a third oil hole (141), the first oil hole (151), the second oil hole (161) and the third oil hole (141) are arranged in a one-to-one correspondence to form the yoke oil passage (111) of the first type of cooling oil passage (21), the first core sheet (15) is formed with a fourth oil hole (152), the second core sheet (16) is formed with a fifth oil hole (162), the core body (14) is formed with a sixth oil hole (142), the fourth oil hole (152), the fifth oil hole (162) and the sixth oil hole (142) are arranged in a one-to-one correspondence to form the tooth oil passage (112) of the first type of cooling oil passage (21); The third core sheet (17) is formed with a seventh oil hole (171), the fourth core sheet (18) is formed with an eighth oil hole (181), the core body (14) is formed with a ninth oil hole (143), the seventh oil hole (171), the eighth oil hole (181) and the ninth oil hole (143) are arranged in a one-to-one correspondence to form the yoke oil channel (111) of the second type cooling oil channel (22), the third core sheet (17) is formed with a tenth oil hole (172), the fourth core sheet (18) is formed with an eleventh oil hole (182), the core body (14) is formed with a twelfth oil hole (144), the tenth oil hole (172), the eleventh oil hole (182) and the twelfth oil hole (144) are arranged in a one-to-one correspondence to form the tooth oil channel (112) of the second type cooling oil channel (22).

7. The stator structure of the motor according to claim 6, characterized in that: The fourth core sheet (18) is formed with a first communicating oil hole (183), the first communicating oil hole (183) extending in a radial direction of the fourth core sheet (18) and being configured as a portion of the corresponding cooling oil passage (11), the first communicating oil hole (183) communicating with the third oil hole (141) and the sixth oil hole (142); and / or The second core sheet (16) is formed with a second communicating oil hole (163), which extends in the radial direction of the second core sheet (16) and is configured as a portion of the corresponding cooling oil channel (11), and the second communicating oil hole (163) is connected to the ninth oil hole (143) and the twelfth oil hole (144).

8. The stator structure of the motor according to claim 6, characterized in that: The structure of the first core sheet (15) is the same as the structure of the third core sheet (17); and / or The structure of the second core piece (16) is the same as the structure of the fourth core piece (18).

9. The stator structure of the motor according to any one of claims 1 to 3, characterized in that: At least a portion of the tooth oil passage (112) is located at a corresponding stator tooth (31) of the stator core (10).

10. A motor, characterized in that: A stator structure (100) comprising an electric machine (1) according to any one of claims 1-9.

11. The motor according to claim 10, characterized in that Also includes: A housing (200) is provided, wherein the stator structure (100) is disposed in the housing (200); along the radial direction of the stator structure (100), the housing (200) has a housing side wall (210) opposite to the stator structure (100); the housing side wall (210) is formed with a plurality of oil inlets (220); along the axial direction of the stator structure (100), some of the plurality of oil inlets (220) are located on one side of the stator structure (100), and another portion of the plurality of oil inlets (220) are located on the other side of the stator structure (100).

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