Stator structure and electric machine

Abstract

The application relates to a stator structure and a motor, comprising an oil guiding section and an oil spraying section, and the oil guiding section is provided with the oil spraying section on both sides along the axial direction of the stator structure. The oil guiding section comprises an oil guiding channel, the oil spraying section comprises an oil spraying channel, the oil spraying channel is communicated with the oil guiding channel, and cooling oil is sprayed to windings located on the stator structure along the oil guiding channel and the oil spraying channel to reduce the temperature of the windings. The oil spraying section comprises a plurality of first laminations, the first lamination comprises a plurality of first oil spraying holes and a plurality of second oil spraying holes, the spacing between the plurality of first oil spraying holes and the outer edge of the first lamination gradually decreases, the plurality of first laminations are staggered to form an inclined oil spraying channel, and the cooling oil is conveniently sprayed to the windings to reduce the temperature of the windings, thereby reducing the temperature of the motor and improving the output power of the motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a stator structure and a motor. Background Technology

[0002] The stator structure of an electric motor includes a yoke and a toothed section. Windings are installed on the toothed section, and current is passed through the windings to generate a magnetic field. When current is passed through the windings, heat is generated inside the windings, and the stator also generates heat in the magnetic field generated by the windings. This causes the motor temperature to rise, the internal resistance of the windings to increase, and the current flow to be obstructed, thereby increasing copper losses and reducing the overall operating efficiency and output power of the motor. Summary of the Invention

[0003] This application provides a stator structure and a motor to solve the problem of high temperature during motor operation.

[0004] In a first aspect, this application provides a stator structure, the stator structure comprising: An oil guiding section, wherein the oil guiding section includes an oil guiding channel; The oil injection section includes an oil injection channel along the axial direction of the stator structure. The oil injection section is located on both sides of the oil guide section, and the oil injection channel is connected to the oil guide channel. The oil injection section includes a plurality of first laminations, each first lamination including a plurality of oil injection holes. The plurality of first laminations are stacked along the axial direction of the stator structure and are staggered along the circumferential direction of the stator structure. The plurality of oil injection holes are divided into a plurality of first oil injection holes and a plurality of second oil injection holes. The distance between the first oil injection hole and the outer edge of the first lamination gradually decreases along the clockwise or counterclockwise direction. The plurality of second oil injection holes are spaced between the first oil injection hole at the beginning position and the first oil injection hole at the end position.

[0005] Compared with related technologies, this stator structure has at least the following advantages: the oil guiding section includes an oil guiding channel, and the oil injection section includes an oil injection channel. The oil injection channel is connected to the oil guiding channel, allowing cooling oil to flow into the oil injection channel along the oil guiding channel and then be sprayed onto the windings to absorb the heat generated by the windings. The distance between the plurality of first oil injection holes and the outer edge of the first laminations gradually decreases in a clockwise or counterclockwise direction. The plurality of first laminations are staggered, and in a direction away from the oil guiding section, the distance between the overlapping first oil injection holes and the outer edge of the first laminations gradually increases, forming an oil injection channel that is inclined towards the teeth to facilitate the spraying of cooling oil onto the windings.

[0006] In a first possible implementation, there is a gap between the first injection hole at the starting position and the first injection hole at the ending position along the radial direction of the first stack, the gap being greater than or equal to the diameter of the first injection hole, and the dimension of the second injection hole along the radial direction of the first stack is greater than the gap.

[0007] In the first possible implementation, the size of the second oil injection hole is larger than the distance between the first two oil injection holes, which can reduce the possibility of some oil injection channels being blocked and improve the cooling effect on the winding.

[0008] In a second possible implementation, the first lamination includes a first yoke and a plurality of first teeth; the oil injection hole is located on the first yoke and along the radial direction of the first lamination, the oil injection hole and the first teeth are on the same straight line.

[0009] In the second possible implementation, the oil injection hole is located in the first yoke, allowing cooling oil to be sprayed out from the first yoke and reducing the possibility of the winding blocking the oil injection hole. The winding is located in the first tooth section, along the radial direction of the first lamination, and the oil injection hole is located on the same straight line as the first tooth section, so that the oil injection hole can be aligned with the winding, facilitating the sprayed cooling oil to fall onto the winding.

[0010] In a third possible implementation, the first stack includes a plurality of first keyways. Along the radial direction of the first stack, the first keyways and the oil injection holes are located on the same straight line. The central angles corresponding to adjacent first keyways are the same as the central angles corresponding to adjacent oil injection holes. The number of first keyways is greater than or equal to the number of first stacks in the oil injection section. One of the plurality of first keyways is provided with a first positioning groove.

[0011] In the third possible implementation, the central angle corresponding to adjacent first keyways is the same as the central angle corresponding to adjacent injection holes. During stacking, the first stack rotates one first keyway and then the second first stack falls, aligning the first keyways in adjacent first stacks. The included angle between adjacent first stacks can be determined by the first keyways, aligning the injection holes on adjacent first stacks. The number of first keyways in the first stack is greater than or equal to the number of first stacks in the injection section, so that the position of multiple first stacks can be confirmed by the relative position of the first keyways in multiple first stacks. The first positioning groove facilitates the identification of the front and back sides of the first stack.

[0012] In a fourth possible implementation, the first lamination includes a plurality of first weld grooves, which are spaced apart on the outer edge of the first lamination, and a first keyway is provided between adjacent first weld grooves.

[0013] In the fourth possible implementation, the first weld groove and the first keyway are spaced apart to reduce the possibility of interference between the first keyway and the first weld groove.

[0014] In a fifth possible implementation, the oil guide section includes a first oil guide section and a second oil guide section. Along the axial direction of the stator structure, the second oil guide section is provided on both sides of the first oil guide section, and the first oil guide section is provided between the second oil guide section and the oil injection section. Along the circumferential direction of the stator structure, multiple first oil guide sections are staggered.

[0015] In the fifth possible implementation, multiple first oil guide sections are staggered, so that the thicker positions formed by processing errors in the multiple first oil guide sections are aligned with the thinner positions, thereby reducing the difference between the same plate.

[0016] In a sixth possible implementation, the first oil guide section includes at least two sets of second laminations, each second lamination including a second yoke and a plurality of second teeth; the second lamination includes a plurality of first oil passage holes, a plurality of second oil passage holes, and a plurality of oil inlet holes; along the radial direction of the second lamination, the first oil passage holes and the oil inlet holes are spaced apart, the first oil passage holes are located in the second teeth, and the oil inlet holes are located in the second yoke and penetrate the side of the second yoke away from the second teeth; along the circumferential direction of the second lamination, the first oil passage holes and the second oil passage holes are alternately arranged; along the direction close to the outer edge of the second lamination, the width of the first oil passage holes and the oil inlet holes gradually increases; adjacent sets of second laminations are staggered, wherein the first oil passage holes and the oil inlet holes of one are both connected to the second oil passage holes of the other.

[0017] In the sixth possible implementation, the second oil passage hole and the first oil passage hole are alternately arranged along the circumference of the second lamination. This reduces the impact of the first oil passage hole, the second oil passage hole, and the oil inlet hole on the strength of the second lamination and on the magnetic circuit of the second yoke. Adjacent sets of second laminations are staggered, aligning the second oil passage hole in one set with the first oil passage hole and the oil inlet hole in the other set, forming a connected oil inlet channel and a first oil guide channel. Cooling oil flows into the stator structure through the oil inlet channel and then into the second oil guide section through the first oil guide channel. The width of the first oil passage hole and the oil inlet hole gradually increases near the outer edge of the second lamination, while the cross-sectional area of ​​the oil inlet channel and the first oil guide channel gradually decreases along the flow direction of the cooling oil. This gradually increases the pressure of the cooling oil, allowing it to fill the oil guide channel and the spray channel, and also increases the flow rate of the cooling oil sprayed onto the winding, thus improving the cooling effect.

[0018] In a seventh possible implementation, the second stack includes at least two second keyways along the radial direction of the second stack, one of which is co-located with the first oil passage and the other with the second oil passage; one of the at least two second keyways is provided with a second positioning groove; the second stack includes multiple sets of second weld grooves, the second weld grooves are located on the side of the second yoke away from the second tooth, along the circumferential direction of the second stack, the second weld grooves are located between the oil inlet and the second oil passage, and the multiple sets of second weld grooves are spaced apart.

[0019] In the seventh possible implementation, the two sets of second laminations in the first oil passage section are staggered. Along the circumference of the stator structure, the included angle between two adjacent sets of second laminations coincides with the included angle between two adjacent second keyways. The second keyways facilitate the determination of the included angle between two adjacent sets of second laminations. The second keyways also facilitate the identification of the front and back sides of the second laminations. Along the circumference of the second laminations, the second weld groove is located between the oil inlet and the second oil passage, reducing the possibility of misalignment between the second weld groove and the oil inlet, thus improving the reliability of the stator structure after welding.

[0020] In the eighth possible implementation, the second oil guide section includes multiple sets of third laminations, which are staggered along the circumference of the stator structure; each third lamination includes multiple third weld grooves, which are spaced apart along the circumference of the third laminations, and the third weld grooves in the multiple sets of third laminations are aligned along the axial direction of the stator structure.

[0021] In the eighth possible implementation, multiple sets of third laminations are staggered, aligning the thicker positions (due to processing errors) with the thinner positions within the multiple third laminations to reduce the difference in thickness between the same plate. Multiple third weld grooves are aligned to facilitate welding the second oil guide section.

[0022] In the ninth possible implementation, the third lamination includes a third yoke and a plurality of third teeth, the third teeth being provided with third oil passage holes, and the third oil passage holes in the plurality of sets of the third laminations are interconnected along the axial direction of the stator structure.

[0023] In the ninth possible implementation, a winding is provided on the third tooth. During the operation of the motor, the temperature of the third tooth is relatively high. The third oil passage is located on the third tooth, so that the second oil guide channel formed by the third oil passage is located on the third tooth. Cooling oil flows in the second oil guide channel, which can absorb the heat of the third tooth and improve the heat dissipation effect of the stator structure.

[0024] In a tenth possible implementation, the third stack includes at least one third keyway, which is located on the same straight line as the third oil passage along the radial direction of the third stack, and at least one of the third keyways is provided with a third positioning groove.

[0025] In the tenth possible implementation, multiple third laminations in the second oil guide section are staggered, and the third keyway facilitates the confirmation of the relative positions of two adjacent third laminations. The third positioning groove facilitates the confirmation of the front and back sides of the third laminations.

[0026] Secondly, this application provides an electric motor, which includes a stator structure, a housing, and windings. The stator structure includes a yoke and a toothed portion. The windings are disposed on the toothed portion, and the housing is fitted onto the yoke. The stator structure is any of the stator structures described above.

[0027] Compared with related technologies, the motor is equipped with the stator structure described in any of the above-mentioned claims, and therefore has the technical effects described in any of the above-mentioned claims, which can reduce the temperature during the operation of the motor, thereby improving the operating efficiency and output power of the motor.

[0028] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the motor provided in an embodiment of this application; Figure 2 This is a schematic diagram of the stator structure provided in an embodiment of this application; Figure 3 This is a schematic diagram of the stator structure and part of the housing provided in the embodiments of this application; Figure 4 for Figure 3 Schematic diagram of the structure in the AA direction; Figure 5 for Figure 4 A magnified view of the area at position I in the middle; Figure 6 for Figure 4 A magnified view of a portion of position II; Figure 7 An exploded view of the stator structure provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of the third lamination provided in an embodiment of this application; Figure 9 for Figure 8 A magnified view of the middle V position; Figure 10 for Figure 7 A magnified view of a portion of position III; Figure 11 This is a schematic diagram of the structure of the first oil guide section provided in an embodiment of this application; Figure 12 This is a schematic diagram of the structure of the second stack of wafers provided in an embodiment of this application; Figure 13 for Figure 12 A magnified view of the middle VI position; Figure 14 for Figure 7 A magnified view of the central IV position; Figure 15 This is a schematic diagram of the structure of the first stack of wafers provided in an embodiment of this application; Figure 16 for Figure 15 A magnified view of position VII in the middle.

[0031] Figure label: 100-Stator structure; 101-Yoke; 102-teeth; 1- Oil guide section; 11- Oil guide channel; 12-First oil guide section; 121 - Second stack; 1211 - Second yoke; 1212 - Second tooth; 1213 - First oil passage hole; 1214 - Second oil passage hole; 1215 - Oil inlet hole; 1216 - Second keyway; 1217 - Second positioning slot; 1218 - Second weld groove; 122 - Oil inlet channel; 123 - First oil guide channel; 124-First guide oil section a; 125 - First guide oil section b; 126-First oil guide section c; 127-First guide oil section d; 128-First oil guide section e; 129-First guide oil section f; 13-Second oil guide section; 131 - Third stack; 1311 - Third weld groove; 1312 - Third yoke; 1313 - Third tooth; 1314 - Third oil passage hole; 1315 - Third keyway; 1316 - Third positioning slot; 132 - Second oil guide channel; 133-Second oil guide section a; 134-Second guide oil section b; 135 - Second guide oil section c; 136 - Second guide section d; 137-Second guide oil section e; 138-Second guide oil section f; 2-Injection section; 21-Injection passage; 211 - First fuel injection passage; 212 - Second fuel injection passage; 22-First stack; 221 - Injector hole; 2211 - First fuel injection hole; 2212 - Second fuel injection hole; 222 - First yoke; 223 - First tooth; 224 - First keyway; 225 - First weld groove; 226 - First positioning slot; 23-Injection section a; 24-Injection section b; 3-Casing; 31-Fuel supply channel; 4-Windings. Detailed Implementation

[0032] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0034] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0035] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In the description of the embodiments of this application, the use of terms such as "same," "equal," or "consistent" regarding dimensions does not require absolute mathematical or geometric precision. Given the actual manufacturing, measurement, and material factors, those skilled in the art should understand that the aforementioned dimensional terms include deviations within permissible limits or unavoidable deviations. As long as such deviations do not affect the realization of the corresponding dimensions' function and technical effect in this application, they should be considered to fall within the meaning of "same dimensions" as described in the embodiments of this application.

[0037] like Figure 1 As shown, this application provides an electric motor, which includes a stator structure 100. The stator structure 100 includes a yoke 101 and a toothed portion 102. A winding 4 is disposed on the toothed portion 102, and a housing 3 is fitted onto the yoke 101. During motor operation, current flows through the winding 4, causing heat to be generated in the winding 4, resulting in an increase in the motor temperature and reducing the overall operating efficiency and output power of the motor.

[0038] like Figure 1 and Figure 2 As shown, this application provides a stator structure 100, with an oil spray hole 221 provided on the yoke 101. The oil spray hole 221 can spray cooling oil onto the winding 4 to absorb the heat generated in the winding 4 and reduce the motor temperature. The stator structure 100 includes an oil guiding section 1 and an oil spray section 2. Along the axial direction of the stator structure 100, oil spray sections 2 are provided on both sides of the oil guiding section 1. Figures 3 to 6 As shown, the oil guiding section 1 includes an oil guiding channel 11, and the oil injection section 2 includes an oil injection channel 21. The oil injection channel 21 is connected to the oil guiding channel 11, so that the cooling oil can flow into the oil injection channel 21 along the oil guiding channel 11, and then be sprayed onto the winding 4 by the oil injection channel 21 to absorb the heat generated by the winding 4.

[0039] like Figure 4As shown, in one possible embodiment, the oil guide section 1 includes a first oil guide section 12 and a second oil guide section 13. The first oil guide section 12 has an interconnected oil inlet channel 122 and a first oil guide channel 123. The second oil guide section 13 has a second oil guide channel 132. Along the axial direction of the stator structure 100, the second oil guide section 13 is provided on both sides of the first oil guide section 12. The second oil guide channel 132 in the second oil guide section 13 is connected to the first oil guide channel 123 in the first oil guide section 12. Figure 4 , Figure 5 and Figure 6 As shown in the figure, the dashed lines with arrows represent the flow path of the cooling oil in the stator structure 100. The cooling oil enters the stator structure 100 through the oil inlet channel 122, then flows to the first oil guide channel 123, and then flows along the axial direction of the stator structure 100 to the second oil guide channels 132 on both sides.

[0040] like Figure 2 , Figure 7 , Figure 8 and Figure 9 As shown, in one possible embodiment, the second oil guiding section 13 includes multiple sets of third laminations 131. Each third lamination 131 includes a third yoke 1312 and multiple third teeth 1313. The third yoke 1312 has an annular structure, and multiple third teeth 1313 are spaced apart along the circumference of the third lamination 131 on its inner edge. Each third tooth 1313 is provided with a third oil passage hole 1314. The multiple sets of third laminations 131 are stacked so that the third oil passage holes 1314 in the multiple sets of third laminations 131 are aligned to form a second oil guiding channel 132. Each third tooth 1313 is correspondingly provided with a third oil passage hole 1314. Along the radial direction of the third lamination 131, the multiple third oil passage holes 1314 are spaced at the same distance from the third yoke 1312. Optionally, the third lamination 131 includes 54 third teeth 1313, and correspondingly provides 54 third oil passage holes 1314. The stator structure 100 has a tooth 102 including a third tooth 1313 in the third lamination 131. Therefore, a winding 4 is provided on the third tooth 1313. During motor operation, the temperature of the third tooth 1313 is high. The third oil passage 1314 is located in the third tooth 1313, so that the second oil guide channel 132 is located in the tooth 102. Cooling oil flows in the second oil guide channel 132, which can absorb the heat of the third tooth 1313 and improve the heat dissipation effect of the stator structure 100.

[0041] like Figure 7As shown, in one possible embodiment, the second oil guiding section 13 includes multiple sets of third laminations 131. These sets of third laminations 131 are staggered along the circumference of the stator structure 100, and the included angle between adjacent sets of third laminations 131 is the same. Multiple third laminations 131 within the same set overlap. Optionally, the thickness of each third lamination 131 is 0.2 mm, and each set of third laminations 131 includes 92 overlapping third laminations 131, resulting in a thickness of 18.4 mm for each set. During the processing of the third laminations 131, due to processing errors, the thickness at different positions within the third laminations 131 may vary. The included angle between adjacent sets of third laminations 131 is related to the number of sets of third laminations 131 in the second oil guiding section 13. The sum of the included angles between multiple sets of third laminations 131 is 360°, aligning the thicker positions with the thinner positions within the multiple sets of third laminations 131 to reduce plate thickness differences. Optionally, the second oil guide section 13 includes three sets of third laminations 131, with an included angle of 120° between each set of third laminations 131.

[0042] like Figure 8 and Figure 9 As shown, in one possible embodiment, the third lamination 131 includes a plurality of third weld grooves 1311. The plurality of third weld grooves 1311 are spaced apart along the circumference of the third lamination 131. After multiple sets of third laminations 131 are stacked, the plurality of third weld grooves 1311 are aligned to facilitate welding the second oil guide section 13. Optionally, the third lamination 131 includes nine weld grooves spaced apart. The nine weld grooves are centrally symmetrically arranged, which improves the reliability after welding and also makes the force on each position in the third lamination 131 more balanced.

[0043] like Figure 8 and Figure 9 As shown, in one possible embodiment, the third stack 131 includes at least one third keyway 1315, and the third keyway 1315 and the third oil passage 1314 are located on the same straight line along the radial direction of the third stack 131. like Figure 8 and Figure 9 As shown, in one possible embodiment, at least one of the third keyways 1315 is provided with a third positioning groove 1316, the third positioning groove 1316 being located at the included angle of the third keyway 1315 and being asymmetrically arranged within the third keyway 1315 to facilitate confirmation of the front and back sides of the third stack 131.

[0044] like Figures 10 to 13As shown, in one possible embodiment, the first oil guide section 12 includes a plurality of second laminations 121. Each second lamination 121 includes a second yoke 1211 and a plurality of second teeth 1212. The second yoke 1211 has an annular structure, and the plurality of second teeth 1212 are spaced apart on the inner edge of the second yoke 1211. In the stator structure 100, the second teeth 1212 overlap with the third teeth 1313 in the third lamination 131, and the second yoke 1211 overlaps with the third yoke 1312 in the third lamination 131. The second lamination 121 includes a plurality of first oil passage holes 1213, a plurality of second oil passage holes 1214, and a plurality of oil inlet holes 1215. Along the radial direction of the second lamination 121, the first oil passage hole 1213 and the oil inlet hole 1215 are spaced apart and located on the same straight line. The first oil passage hole 1213 is located on the second tooth portion 1212, so that the first oil passage hole 1213 can be aligned with the third oil passage hole 1314. The first oil inlet hole 1215 is located on the second yoke portion 1211 and can penetrate the side of the second yoke portion 1211 away from the second tooth portion 1212, forming an oil inlet channel 122 on the side wall of the stator structure 100, so that cooling oil can enter the stator structure 100 along the oil inlet channel 122. One end of the second oil passage hole 1214 is located on the second yoke portion 1211, and the other end is located on the second tooth portion 1212. Along the radial direction of the second lamination 121, the length of the second oil passage hole 1214 is greater than the distance between the first oil passage hole 1213 and the oil inlet hole 1215. Along the circumferential direction of the second lamination 121, the second oil passage 1214 and the first oil passage 1213 are alternately arranged, which can reduce the influence of the first oil passage 1213, the second oil passage 1214 and the oil inlet 1215 on the strength of the second lamination 121 and the magnetic circuit of the yoke 101 in the stator structure 100.

[0045] The first oil guiding section 12 includes at least two sets of second laminations 121. Each set of second laminations 121 includes multiple overlapping second laminations 121. Optionally, the thickness of a single second lamination 121 is 0.2 mm, and each set of second laminations 121 includes 12 second laminations 121, making the thickness of each set of second laminations 121 2.4 mm. Along the circumference of the second laminations 121, adjacent sets of second laminations 121 are staggered, so that the second oil passage hole 1214 in one set of second laminations 121 is aligned with the first oil passage hole 1213 and oil inlet hole 1215 in another set of second laminations 121, to form a connected oil inlet channel 122 and a first oil guiding channel 123, so that cooling oil flows into the stator structure 100 through the oil inlet channel 122, and then flows into the second oil guiding channel 132 through the first oil guiding channel 123. Optionally, the first oil guide section 12 includes two sets of second laminations 121, wherein the first oil passage hole 1213 of one set of second laminations 121 is aligned with the third oil passage hole 1314 in the second oil guide section 13, and the second oil passage hole 1214 of the other set of second laminations 121 is aligned with the third oil passage hole 1314 in the second oil guide section 13, so that the cooling oil can flow to the second oil guide sections 13 on both sides.

[0046] like Figure 13 As shown, in one possible embodiment, the width of the first oil passage 1213 and the oil inlet 1215 gradually increases along the direction close to the outer edge of the second lamination 121, while the cross-sectional area of ​​the oil inlet channel 122 and the cross-sectional area of ​​the first oil guide channel 123 gradually decrease along the flow direction of the cooling oil, thereby gradually increasing the pressure of the cooling oil. This allows the cooling oil to fill the oil guide channel 11 and the oil spray channel 21, and also increases the flow rate of the cooling oil sprayed onto the winding 4, which is beneficial for improving the cooling effect.

[0047] like Figure 10 , Figure 12 and Figure 13 As shown, in one possible embodiment, the second lamination 121 includes at least two second keyways 1216. Along the radial direction of the second lamination 121, one is collinear with the first oil passage 1213, and the other is collinear with the second oil passage 1214. The two sets of second laminations 121 in the first oil passage section are staggered. Along the circumferential direction of the stator structure 100, the included angle between two adjacent sets of second laminations 121 coincides with the included angle between two adjacent second keyways 1216. The second keyways 1216 facilitate the determination of the included angle between two adjacent sets of second laminations 121.

[0048] like Figure 12 and Figure 13 As shown, in one possible embodiment, at least one of the two second keyways 1216 is provided with a second positioning groove 1217. The second positioning groove 1217 is located at the included angle of the second keyway 1216 and is asymmetrically arranged within the second keyway 1216 to facilitate the identification of the front and back sides of the second stack 121.

[0049] like Figure 12 and Figure 13As shown, in one possible embodiment, the second lamination 121 includes multiple sets of second weld grooves 1218. The second weld grooves 1218 are located on the side of the second yoke 1211 away from the second tooth 1212, and the multiple sets of second weld grooves 1218 are spaced apart circumferentially along the second lamination 121. Optionally, the second lamination 121 includes nine sets of second weld grooves 1218. After the second lamination 121 and the third lamination 131 are stacked, they can have second weld grooves 1218 aligned with the third weld groove 1311, which facilitates welding. Along the circumference of the second lamination 121, the second weld grooves 1218 are located between the oil inlet hole 1215 and the second oil passage hole 1214, which can reduce the possibility of the second weld grooves 1218 being aligned with the oil inlet hole 1215, and is beneficial to improving the reliability of the stator structure 100 after welding. Optionally, each group of second weld grooves 1218 includes two second weld grooves 1218, and the distance between the two second weld grooves 1218 is the same as the distance between the two second keyways 1216. After the two groups of second stacked plates 121 are staggered, the second weld grooves 1218 in the two groups of second stacked plates 121 can be aligned, which facilitates welding.

[0050] like Figures 14 to 16 As shown, in one possible embodiment, the fuel injection section 2 includes a plurality of first laminations 22, each first lamination 22 including a plurality of fuel injection holes 221, which are spaced apart circumferentially along the first laminations 22. The plurality of first laminations 22 in the fuel injection section 2 are stacked and spaced apart circumferentially along the stator structure 100. The fuel injection holes 221 in adjacent first laminations 22 are staggered and aligned in a clockwise or counterclockwise direction, so that the fuel injection holes 221 located at different positions in the plurality of first laminations 22 overlap to form a fuel injection channel 21.

[0051] The oil injection holes 221 are divided into multiple first oil injection holes 2211 and multiple second oil injection holes 2212. The multiple first oil injection holes 2211 are spirally arranged in a clockwise or counterclockwise direction, with the distance between the first oil injection holes 2211 and the outer edge of the first lamination 22 gradually decreasing. The multiple first laminations 22 are staggered, and along the direction away from the oil guide section 1, the distance between the overlapping first oil injection holes 2211 and the outer edge of the first lamination 22 gradually increases. The resulting oil injection channel 21 is inclined towards the tooth section 102 to facilitate the spraying of cooling oil onto the winding 4. By adjusting the radial spacing of adjacent first oil injection holes 2211 in the first lamination 22, the inclination angle of the oil injection channel 21 can be adjusted, thereby adjusting the spray range of the cooling oil.

[0052] Multiple first oil injection holes 2211 are spirally arranged such that the radial distance d between the first oil injection holes 2211 at the beginning and the end of the first oil injection holes 2211 is greater than or equal to the diameter of the first oil injection holes 2211. The staggered arrangement of the multiple first laminations 22 can obstruct the first oil injection holes 2211, preventing some of the oil injection channels 21 from spraying cooling oil onto the winding 4. Multiple second oil injection holes 2212 are located between the first oil injection holes 2211 at the beginning and the end of the first oil injection holes 2211, and are spaced apart circumferentially along the first laminations 22. The size D of the second oil injection holes 2212 is larger than the distance d between the first and last first oil injection holes 2211 along the radial direction of the first laminations 22, reducing the possibility of obstruction of some oil injection channels 21 and improving the cooling effect on the winding 4.

[0053] Both sides of the oil guide section 1 are equipped with oil injection sections 2, such as... Figures 4 to 6 As shown, in one possible embodiment, the oil injection section 2 located on one side of the oil guiding section 1 includes a plurality of first laminations 22 arranged in a clockwise staggered manner. The oil injection holes 221 in the plurality of first laminations 22 form a first oil injection channel 211. Along the direction away from the oil guiding section 1, the first oil guiding channel 123 is inclined towards the center of the stator structure 100 to facilitate spraying cooling oil onto the winding 4. The oil injection section 2 located on the other side of the oil guiding section 1 includes a plurality of first laminations 22 arranged in a counterclockwise staggered manner. The oil injection holes 221 in the plurality of first laminations 22 form a second oil injection channel 212. Along the direction away from the oil guiding section 1, the second oil guiding channel 132 is inclined towards the center of the stator structure 100 to facilitate spraying cooling oil onto the winding 4.

[0054] like Figure 15 and Figure 16 As shown, in one possible embodiment, the first lamination 22 includes a first yoke 222 and a plurality of first teeth 223. The first yoke 222 has an annular structure, and the plurality of first teeth 223 are spaced apart on the inner edge of the first yoke 222. In the stator structure 100, the first teeth 223, the second teeth 1212, and the third teeth 1313 overlap to facilitate the arrangement of the winding 4. The oil injection hole 221 is located on the first yoke 222, allowing cooling oil to be sprayed out from the first yoke 222, reducing the possibility of the winding 4 blocking the oil injection hole 221. The winding 4 is disposed on the first teeth 223. Along the radial direction of the first lamination 22, the oil injection hole 221 and the first teeth 223 are located on the same straight line, so that the oil injection hole 221 can be aligned with the winding 4, facilitating the sprayed cooling oil to fall onto the winding 4.

[0055] The oil injection hole 221 is located in the first yoke 222, and the third oil passage hole 1314 in the second oil guide section 13 is located in the third toothed section 1313, such as Figures 4 to 7As shown, in one possible embodiment, a first oil guiding section 12 is provided between the second oil guiding section 13 and the oil injection section 2. The first oil guiding section 12 includes two sets of staggered second laminations 121. The first oil passage hole 1213 of one set of the two sets of second laminations 121 is connected to the third oil passage hole 1314, and the second oil passage hole 1214 of the other set is connected to the oil injection channel 21, so that the oil injection channel 21 is connected to the second oil guiding channel 132; or, the second oil passage hole 1214 of one set of the two sets of second laminations 121 is aligned with the third oil passage hole 1314, and the oil inlet hole 1215 of the other set is connected to the oil injection channel 21, so that the oil injection channel 21 is connected to the second oil guiding channel 132.

[0056] like Figure 4 As shown, the stator structure 100 is located inside the housing 3 and is interference-fitted with the inner wall of the housing 3. The inner wall of the housing 3 can block the oil inlet hole 1215 of the first oil guide section 12 between the second oil guide section 13 and the oil injection section 2, which can reduce the possibility of cooling oil leakage in the stator structure 100.

[0057] There is a first oil guide section 12 between the two second oil guide sections 13, and there is also a first oil guide section 12 between the second oil guide section 13 and the oil injection section 2, so that there are three first oil guide sections 12 in the stator structure 100. Due to processing errors, the thickness of different positions in the first oil guide section 12 will be different. In one possible embodiment, the included angle between two adjacent first oil guide sections 12 is 120°, so that the position with larger thickness in the multiple first oil guide sections 12 is aligned with the position with smaller thickness, so as to reduce the difference in thickness between the same plate.

[0058] like Figure 14 , Figure 15 and Figure 16As shown, in one possible embodiment, the first stack 22 includes a plurality of first keyways 224. These first keyways 224 are spaced apart along the circumference of the first stack 22. Along the radial direction of the first stack 22, the first keyways 224 and the injection holes 221 are located on the same straight line. The central angles corresponding to adjacent first keyways 224 and adjacent injection holes 221 are the same. During stacking, the first stack 22 rotates one first keyway 224 and then another first stack 22 falls down, aligning the first keyways 224 in adjacent first stacks 22. The included angle between adjacent first stacks 22 can be determined by the first keyways 224, aligning the injection holes 221 on adjacent first stacks 22. The number of first keyways 224 in the first stack 22 is greater than or equal to the number of first stacks 22 in the injection section 2, so that the position of the multiple first stacks 22 can be confirmed by the relative positions of the first keyways 224 in the multiple first stacks 22. The stator structure 100 has multiple first laminations 22, multiple second laminations 121, and multiple third laminations 131. Each lamination has a thickness of 0.2 mm and a tolerance of 0.02 mm. Therefore, the thickness of the stator structure 100 will vary after the multiple first laminations 22, multiple second laminations 121, and multiple third laminations 131 are stacked. Optionally, the oil injection section 2 includes 5 to 10 first laminations 22. The specific number of first laminations 22 can be determined based on the thickness of the multiple second laminations 121 and multiple third laminations 131 after stacking, so as to reduce the error in the thickness of the stator structure 100.

[0059] like Figure 15 and Figure 16 As shown, in one possible embodiment, one of the plurality of first keyways 224 is provided with a first positioning groove 226. The first positioning groove 226 is located at the included angle of the first keyway 224 and is asymmetrically arranged within the first keyway 224 to facilitate confirmation of the front and back sides of the first stacked piece 22.

[0060] like Figure 15 and Figure 16 As shown, in one possible embodiment, the first stack 22 includes a plurality of first weld grooves 225, which are spaced apart on the outer edge of the first stack 22. A first keyway 224 is provided between adjacent first weld grooves 225, such that the first weld grooves 225 and the first keyway 224 are spaced apart, reducing the possibility of interference between the first keyway 224 and the first weld grooves 225. Optionally, the first stack 22 includes 54 weld seams. After the first stack 22, the second stack 121, and the third stack 131 are stacked, they can have first weld grooves 225 aligned with the third weld groove 1311, facilitating welding.

[0061] The second lamination 121 has at least two second keyways 1216, one of which is collinear with the first oil passage 1213 and located at the end of the oil inlet 1215, creating a gap between the second keyway 1216 and the inner wall of the housing 3. The first keyway 224 also has a gap with the inner wall of the housing 3. When the second keyway 1216 is aligned with the first keyway 224, cooling oil in the stator structure 100 will leak through the first keyway 224 and the second keyway 1216. Adjusting this position to below the stator structure 100 reduces the possibility of leakage affecting the motor. An oil supply channel 31 is provided inside the housing 3, aligned with the first oil guide section 12 in the middle position, allowing cooling oil to flow into the stator structure 100 through the first oil guide section 12 in the middle position.

[0062] During the fabrication of the stator structure 100, the first lamination 22, the second lamination 121, and the third lamination 131 are placed from the loading device to the receiving device in a preset order. By rotating the receiving device, a preset angle is formed between the first lamination 22, the second lamination 121, and the third lamination 131. After the loading is completed, the first lamination 22, the second lamination 121, and the third lamination 131 have multiple aligned weld grooves. Then, the first lamination 22, the second lamination 121, and the third lamination 131 that have been placed to the receiving device are stacked and welded.

[0063] like Figure 7 As shown, the position where the positioning groove is located in the stack of sheets is taken as the absolute position. That is, when the stack of sheets falls to the receiving device, the positioning groove is at the zero-degree position. The first stack of sheets 22, the second stack of sheets 121, and the third stack of sheets 131 are positioned by the position of the positioning groove. The unloading process of the first stack of sheets 22, the second stack of sheets 121, and the third stack of sheets 131 includes: The first stack of blades 22 is dropped from the feeding device onto the receiving device; the receiving device rotates counterclockwise by one first keyway 224, and the second first stack of blades 22 is dropped from the feeding device onto the receiving device, and so on, up to 10 first stacks of blades 22 are dropped from the feeding device onto the receiving device, forming the oil spraying section a23; 12 second stacks of blades 121 are dropped from the feeding device onto the receiving device, and the second positioning groove 1217 is aligned with the first positioning groove 226, forming the first oil guiding section a124; the receiving device rotates counterclockwise by one second keyway 1216, and the 12 second stacks of blades 121 are dropped from the feeding device onto the receiving device, forming the first oil guiding section b125; the receiving device rotates clockwise by one second keyway 1216. 16. 92 third-layer laminations 131 are fed from the feeding device onto the receiving device, forming a second oil guiding section a133. The third positioning groove 1316 in the second oil guiding section a133 is aligned with the second positioning groove 1217 in the first oil guiding section a124. The receiving device rotates 120° clockwise, and 92 third-layer laminations 131 are fed from the feeding device onto the receiving device, forming a second oil guiding section b134. The receiving device rotates 120° clockwise, and 92 third-layer laminations 131 are fed from the feeding device onto the receiving device, forming a second oil guiding section c135. 12 second-layer laminations 121 are fed from the feeding device onto the receiving device, forming a first oil guiding section c126. The third positioning groove 1316 in the first oil guiding section c126 is aligned with the second positioning groove 1217 in the first oil guiding section c124. The second positioning groove 1217 aligns with the third positioning groove 1316 in the second oil guiding section c135; the receiving device rotates counterclockwise by one second keyway 1216, and 12 second stacked plates 121 fall from the feeding device onto the receiving device, forming the first oil guiding section d127; the receiving device rotates counterclockwise by 133.33°, and 92 third stacked plates 131 fall from the feeding device onto the receiving device, forming the second oil guiding section d136; the receiving device rotates clockwise by 120°, and 92 third stacked plates 131 fall from the feeding device onto the receiving device, forming the second oil guiding section e137; the receiving device rotates clockwise by 120°, and 92 third stacked plates 131 fall from the feeding device onto the receiving device, forming... The second oil guiding section f138; the receiving device rotates clockwise 120°, and 12 second stacked laminations 121 fall from the feeding device onto the receiving device, forming the first oil guiding section e128; the receiving device rotates counterclockwise by one second keyway 1216, and 12 second stacked laminations 121 fall from the feeding device onto the receiving device, forming the first oil guiding section f129; the receiving device rotates clockwise 133.33°, and one first stacked lamination 22 falls from the feeding device onto the receiving device; the receiving device rotates clockwise by one first keyway 224, and one first stacked lamination 22 falls from the feeding device onto the receiving device, and so on, until 10 first stacked laminations 22 fall from the feeding device onto the receiving device, forming the oil spraying section b24. The lamination stacking of the first stator structure 100 is completed, and at this time the receiving device returns to its initial position, and the stator structure 100 is pushed out. The above steps can be repeated to stack multiple stator structures 100.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application, or the scope of this application should be defined by the appended claims.

Claims

1. A stator structure, characterized in that, The stator structure (100) includes: Oil guiding section (1), wherein the oil guiding section (1) includes an oil guiding channel (11); The oil injection section (2) includes an oil injection channel (21) along the axial direction of the stator structure (100). The oil injection section (2) is located on both sides of the oil guide section (1). The oil injection channel (21) is connected to the oil guide channel (11). The oil injection section (2) includes a plurality of first laminations (22), each of which includes a plurality of oil injection holes (221). The plurality of first laminations (22) are stacked along the axial direction of the stator structure (100) and are staggered along the circumferential direction of the stator structure (100). The plurality of oil injection holes (221) are divided into a plurality of first oil injection holes (2211) and a plurality of second oil injection holes (2212). Along the circumference of the first stack (22), the distance between the plurality of first oil injection holes (2211) and the outer edge of the first stack (22) gradually decreases. The plurality of second oil injection holes (2212) are spaced between the first oil injection holes (2211) at the beginning position and the first oil injection holes (2211) at the end position.

2. The stator structure according to claim 1, characterized in that, Along the radial direction of the first stack (22), there is a gap between the first oil injection hole (2211) at the starting position and the first oil injection hole (2211) at the ending position, the gap being greater than or equal to the diameter of the first oil injection hole (2211), and the dimension of the second oil injection hole (2212) along the radial direction of the first stack (22) is greater than the gap.

3. The stator structure according to claim 1, characterized in that, The first stack (22) includes a first yoke (222) and a plurality of first teeth (223); the oil injection hole (221) is located on the first yoke (222), and along the radial direction of the first stack (22), the oil injection hole (221) and the first teeth (223) are located on the same straight line.

4. The stator structure according to claim 1, characterized in that, The first stack (22) includes a plurality of first keyways (224). Along the circumference of the first stack (22), the plurality of first keyways (224) are spaced apart. The central angle corresponding to an adjacent first keyway (224) is the same as the central angle corresponding to an adjacent oil injection hole (221). The number of first keyways (224) is greater than or equal to the number of first stacks (22) in the oil injection section (2). One of the plurality of first keyways (224) is provided with a first positioning groove (226).

5. The stator structure according to claim 4, characterized in that, The first stack (22) includes a plurality of first weld grooves (225), the plurality of first weld grooves (225) are spaced apart on the outer edge of the first stack (22), and a first keyway (224) is provided between adjacent first weld grooves (225).

6. The stator structure according to claim 1, characterized in that, The oil guide section (1) includes a first oil guide section (12) and a second oil guide section (13). The second oil guide section (13) is provided on both sides of the first oil guide section (12) along the axial direction of the stator structure (100). The first oil guide section (12) is provided between the second oil guide section (13) and the oil injection section (2). Multiple first oil guide sections (12) are staggered along the circumference of the stator structure (100).

7. The stator structure according to claim 6, characterized in that, The first oil guide section (12) includes at least two sets of second laminations (121), each second lamination (121) including a second yoke (1211) and a plurality of second teeth (1212); the second lamination (121) includes a plurality of first oil passage holes (1213), a plurality of second oil passage holes (1214), and a plurality of oil inlet holes (1215). Along the radial direction of the second lamination (121), the first oil passage holes (1213) and the oil inlet holes (1215) are spaced apart, the first oil passage holes (1213) are located in the second teeth (1212), and the oil inlet holes (1215) are located in the second yoke (1212). 211), and penetrating the second yoke (1211) away from the second tooth (1212), along the circumference of the second lamination (121), the first oil passage hole (1213) and the second oil passage hole (1214) are alternately arranged; along the direction close to the outer edge of the second lamination (121), the width of the first oil passage hole (1213) and the oil inlet hole (1215) gradually increases; two adjacent sets of second laminations (121) are staggered, wherein the first oil passage hole (1213) and the oil inlet hole (1215) of one are connected to the second oil passage hole (1214) of the other.

8. The stator structure according to claim 7, characterized in that, The second stack (121) includes at least two second keyways (1216). Along the radial direction of the second stack (121), one of the second keyways (1216) is located on the same straight line as the first oil passage (1213), and the other is located on the same straight line as the second oil passage (1214). One of the at least two second keyways (1216) is provided with a second positioning groove (1217). The second stack (121) includes multiple sets of second weld grooves (1218). The second weld grooves (1218) are located on the side of the second yoke (1211) away from the second tooth (1212). Along the circumferential direction of the second stack (121), the second weld grooves (1218) are located between the oil inlet (1215) and the second oil passage (1214), and the multiple sets of second weld grooves (1218) are spaced apart.

9. The stator structure according to claim 6, characterized in that, The second oil guide section (13) includes multiple sets of third laminations (131), which are staggered along the circumference of the stator structure (100); each third lamination (131) includes multiple third weld grooves (1311), which are spaced apart along the circumference of the third lamination (131), and the third weld grooves (1311) in the multiple sets of third laminations (131) are aligned along the axial direction of the stator structure (100).

10. The stator structure according to claim 9, characterized in that, The third lamination (131) includes a third yoke (1312) and a plurality of third teeth (1313). The third teeth (1313) are provided with third oil passage holes (1314). Along the axial direction of the stator structure (100), the third oil passage holes (1314) in the plurality of sets of the third laminations (131) are interconnected.

11. The stator structure according to claim 10, characterized in that, The third stack (131) includes at least one third keyway (1315). Along the radial direction of the third stack (131), the third keyway (1315) and the third oil passage (1314) are located on the same straight line. At least one of the third keyways (1315) is provided with a third positioning groove (1316).

12. An electric motor, characterized in that, The motor includes a stator structure (100), a housing (3), and a winding (4). The stator structure (100) includes a yoke (101) and a toothed portion (102). The winding (4) is disposed on the toothed portion (102), and the housing (3) is sleeved on the yoke (101). The stator structure (100) is the stator structure (100) according to any one of claims 1 to 11.

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