Stator core, stator, motor and vehicle

Abstract

The utility model relates to the technical field of drive motors, and specifically discloses a stator core, a stator, a motor and a vehicle. The core includes six reversing components, a plurality of oil channel components and a plurality of oil inlet components; the first avoidance ports on the second and fifth reversing components are 180° offset from the first avoidance ports on the first reversing component; a plurality of oil channel components are arranged between the reversing components, and a plurality of first oil channels of two adjacent oil channel components are arranged in a staggered manner; a plurality of oil inlet components are arranged between the third and fourth reversing components, and a plurality of oil channel components are sandwiched between every two oil inlet components, the second avoidance ports on the oil inlet components are 180° offset from the first avoidance ports on the first reversing component, and the second oil channel is arranged in a staggered manner with a plurality of first oil channels on adjacent oil channel components. The core adopts the above-mentioned improvements to achieve an optimized layout of the cooling oil flow direction, increase the contact area, increase the flow rate, and enhance the oil cooling and heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of drive motors, in particular to a stator core, a stator, a motor and a vehicle. Background Art

[0002] With the popularity of new energy electric vehicles, drive motors, as core components of new energy vehicles, are also moving towards higher torque density and higher power density. While pursuing high indicators, motor temperature rise has become the most difficult problem to overcome. Moreover, the motor temperature rise problem directly affects the stability and safety of electric vehicles. Therefore, the cooling structure design has very important practical significance in the design process of the drive motor.

[0003] Motor cooling can be divided into two categories according to the cooling medium: air cooling and liquid cooling. Among them, liquid cooling also includes oil cooling and water cooling.

[0004] Air cooling refers to the use of some cooling fins on the outside of the casing to remove heat through flowing air. The heat dissipation efficiency is relatively low. There are mainly two forms: natural cooling and forced air cooling.

[0005] Water cooling refers to adding water channels in the motor casing to remove heat through heat exchange, which has become the mainstream cooling method. However, its disadvantage is that it cannot directly cool the heat source. The heat of the winding needs to pass through copper wires, insulation layers, iron cores, casings and other parts before being removed by cooling water. The transfer path is long and the cooling efficiency is low.

[0006] Compared with water cooling, the advantage of oil cooling is that oil is non-conductive and non-magnetic, has good insulation properties, can directly contact the internal components of the motor, and penetrate deep into the rotor and stator windings for more complete heat exchange, making the heat dissipation more efficient.

[0007] The oil cooling structure has become a current research hotspot due to its unique advantages. The oil cooling structure has two major categories: oil immersion type and oil injection type, and is mostly used in flat wire motors. The oil immersion cooling method is to immerse the stator and rotor of the motor in cooling oil for cooling, which will affect the efficiency of the motor. The oil injection cooling method is to add an oil channel to the stator yoke so that the cooling oil is sprayed to the end of the stator or other hot places through the oil channel for cooling. The oil injection oil cooling method can feed oil from the end or from the middle of the core, but the stator core oil circuit generally has the disadvantages of short transmission path, uneven oil distribution and slow flow rate, which leads to poor cooling effect of the flat copper wire and the core in the slot. Utility Model Content

[0008] The utility model aims to provide a stator core, a stator, a motor and a vehicle to solve the problems of short oil transmission path, uneven oil distribution and slow flow rate of the stator core, and to improve the cooling effect of the oil cooling structure.

[0009] To achieve this purpose, the utility model adopts the following technical solutions:

[0010] The stator core comprises six reversing assemblies, a plurality of oil channel assemblies and a plurality of oil inlet assemblies; the reversing assembly is formed by stacking a plurality of first punching sheets, a first notch is provided on the first punching sheet, all the first notches in the reversing assembly are connected to form a first avoidance opening, the first avoidance openings on the third, fourth and sixth reversing assemblies are in the same position as the first avoidance opening on the first reversing assembly, and the first avoidance openings on the second and fifth reversing assemblies are 180° offset from the first avoidance opening on the first reversing assembly; the oil channel assembly is arranged between the reversing assemblies, the oil channel assembly is formed by stacking a plurality of second punching sheets, a plurality of first through holes are uniformly distributed in the circumferential direction of the second punching sheets, and each of the first through holes can be connected with the first through hole along the extension direction The other first through holes are connected to form a first oil passage, and the multiple first oil passages of two adjacent oil passage assemblies are staggered; the oil inlet assembly is arranged between the third and fourth reversing assemblies, and a plurality of oil passage assemblies are sandwiched between every two oil inlet assemblies, and the oil inlet assembly is formed by stacking a plurality of third punching sheets, and the third punching sheet has a second notch and a plurality of second through holes, all the second notches in the oil inlet assembly are connected to form a second avoidance port, and the second avoidance port is 180° staggered with the first avoidance port on the first reversing assembly, and each of the second through holes can be connected with the corresponding second through hole along the extension direction to form a second oil passage, and the second oil passage is staggered with the multiple first oil passages on the adjacent oil passage assemblies.

[0011] As an optional technical solution for the stator core, the oil channel assembly is divided into multiple first assemblies, two second assemblies, multiple third assemblies, multiple fourth assemblies and two fifth assemblies of different thicknesses, and a number of the third assemblies are sandwiched between every two oil inlet assemblies; part of the first assemblies and one of the second assemblies are sandwiched between the first and second reversing assemblies, the remaining first assemblies and another second assemblies are sandwiched between the fifth and sixth reversing assemblies, a number of fourth assemblies and one of the fifth assemblies are sandwiched between the second and third reversing assemblies, and a number of fourth assemblies and another fifth assemblies are sandwiched between the fourth and fifth reversing assemblies; a number of fourth assemblies are sandwiched between the third reversing assembly and the oil inlet assembly at one end, and a number of fourth assemblies are sandwiched between the fourth reversing assembly and the oil inlet assembly at the other end.

[0012] As an optional technical solution for the stator core, a first supporting rib is provided between two adjacent first through holes, and a second supporting rib is provided between two adjacent second through holes and between the second through hole and the adjacent second notch.

[0013] As an optional technical solution for the stator core, the number of the first support ribs and the number of the first through holes are both 44, the number of the second support ribs is 41, and the number of the second through holes is 40.

[0014] As an optional technical solution for the stator core, with respect to the adjacent reversing assembly and the oil channel assembly, in the thickness direction of the stator core, the projection of the edge of the first avoidance opening is spaced apart from the projection of the first oil channel; with respect to the adjacent oil inlet assembly and the oil channel assembly, in the thickness direction of the stator core, the projection of the edge of the second avoidance opening is spaced apart from the projection of the first oil channel.

[0015] As an optional technical solution for the stator core, the inner side wall of the first punching sheet has a plurality of first stator slots, the inner side wall of the second punching sheet has a plurality of second stator slots, and the inner side wall of the third punching sheet has a plurality of third stator slots, and the plurality of first stator slots, the plurality of second stator slots and the plurality of third stator slots are aligned with each other.

[0016] As an optional technical solution for the stator core, the number of each of the first stator slots, the second stator slots and the third stator slots is 48.

[0017] The stator comprises a stator winding and the above-mentioned stator core, wherein the stator core has stator teeth; and the stator winding is wound on the stator teeth.

[0018] The motor comprises a housing and the above-mentioned stator, wherein the housing has a housing oil supply port, the stator is arranged in the housing, and the stator core is communicated with the housing oil supply port.

[0019] A vehicle comprises a vehicle body and the above-mentioned motor, wherein the motor is arranged on the vehicle body.

[0020] Beneficial effects of the utility model:

[0021] The stator core stacks the reversing assembly, the oil channel assembly and the oil inlet assembly in order, so that all the first oil channels and the second oil channels are connected to each other and form a cooling oil circuit network, thereby completing the optimized layout of the cooling oil flow trajectory in the stator core, thereby solving the problems of short oil circuit transmission path, uneven oil distribution and slow flow rate in the stator core, thereby increasing the contact area between the cooling oil circuit network and the cooling oil, accelerating the flow rate of the cooling oil, balancing the cooling oil volume in various places in the stator, ensuring the oil cooling and heat dissipation effect, and improving the cooling efficiency of the stator core and the flat copper wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a stator core provided by an embodiment of the utility model from a first perspective;

[0023] Figure 2 It is a structural schematic diagram of a stator core provided by an embodiment of the utility model from a second viewing angle;

[0024] Figure 3 is a top view of a stator core provided by an embodiment of the utility model;

[0025] Figure 4 It is a side view of the stator core provided by an embodiment of the utility model;

[0026] Figure 5 yes Figure 4 A partial enlarged view of middle A;

[0027] Figure 6 It is a structural schematic diagram of a first punching sheet provided in an embodiment of the utility model;

[0028] Figure 7 It is a structural schematic diagram of a second punching sheet provided in an embodiment of the utility model;

[0029] Figure 8 It is a structural schematic diagram of a third punching sheet provided in an embodiment of the utility model;

[0030] Fig. 9 It is a flow chart of a method for manufacturing a stator core provided in an embodiment of the utility model.

[0031] In the figure:

[0032] 110, reversing assembly; 120, first assembly; 130, second assembly; 140, third assembly; 150, fourth assembly; 160, fifth assembly; 170, oil inlet assembly;

[0033] 200, first punching sheet; 201, first notch; 202, first stator tooth; 203, first stator slot; 204, first stator yoke;

[0034] 300, second punching sheet; 301, first through hole; 302, second stator tooth; 303, second stator slot; 304, second stator yoke; 305, first supporting rib;

[0035] 400, third punching sheet; 401, second through hole; 402, third stator tooth; 403, third stator slot; 404, third stator yoke; 405, second supporting rib; 406, second notch;

[0036] 901, first oil outlet channel; 902, second oil outlet channel; 903, third oil outlet channel; 904, oil inlet. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] like Figures 1 to 8As shown, the present embodiment provides a stator core, including six reversing assemblies 110, a plurality of oil channel assemblies and a plurality of oil inlet assemblies 170; the reversing assembly 110 is formed by stacking a plurality of first punching sheets 200, a first notch 201 is provided on the first punching sheet 200, all the first notches 201 in the reversing assembly 110 are connected and form a first avoidance opening, the first avoidance openings on the third, fourth and sixth reversing assemblies 110 are at the same position as the first avoidance opening on the first reversing assembly 110, and the first avoidance openings on the second and fifth reversing assemblies 110 are 180° offset from the first avoidance opening on the first reversing assembly 110; the oil channel assembly is arranged between the reversing assemblies 110, and the oil channel assembly is formed by stacking a plurality of second punching sheets 300, a plurality of first through holes 301 are uniformly distributed circumferentially on the second punching sheets 300, and each first through hole 301 can be connected with other first through holes 301 along the extension direction to form a first oil channel, and multiple first oil channels of two adjacent oil channel assemblies are staggered; the oil inlet assembly 170 is arranged between the third and fourth reversing assemblies 110, and a plurality of oil channel assemblies are sandwiched between every two oil inlet assemblies 170, and the oil inlet assembly 170 is formed by stacking a plurality of third punching sheets 400, and the third punching sheet 400 has a second notch 406 and a plurality of second through holes 401, and all the second notches 406 in the oil inlet assembly 170 are connected to form a second avoidance port, and the second avoidance port is 180° staggered with the first avoidance port on the first reversing assembly 110, and each second through hole 401 can be connected with the corresponding second through hole 401 along the extension direction to form a second oil channel, and the second oil channel is staggered with multiple first oil channels on adjacent oil channel assemblies.

[0042] The stator core adopts a method of stacking the reversing assembly 110, the oil channel assembly and the oil inlet assembly 170 in order, so that all the first oil channels and the second oil channels are connected to each other and form a cooling oil circuit network, thereby completing the optimized layout of the cooling oil flow trajectory in the stator core, thereby solving the problems of short oil circuit transmission path, uneven oil distribution and slow flow rate in the stator core, thereby increasing the contact area between the cooling oil circuit network and the cooling oil, accelerating the flow rate of the cooling oil, balancing the amount of cooling oil in various places in the stator, ensuring the effect of oil cooling and heat dissipation, and improving the cooling efficiency of the stator core and the flat copper wire.

[0043] Among them, the first oil passages of two adjacent oil passage assemblies are staggered, and the second oil passage and multiple first oil passages on the adjacent oil passage assemblies are staggered. The above limitations realize the network connection of the oil passages between the components, so that all the oil passage assemblies located between the first and third reversing assemblies 110 and between the fourth and sixth reversing assemblies 110 form a first oil circuit network, and all the oil passage assemblies and the oil inlet assembly 170 located between the third and fourth reversing assemblies 110 form a second oil circuit network. The first oil circuit network and the second oil circuit network constitute a cooling oil circuit network. The second oil circuit network is connected to the first oil circuit network through the first avoidance ports on the third and fourth reversing assemblies 110, so that the third and fourth reversing assemblies 110 become a primary reversing mechanism; the space in the first oil circuit network is also separated by the second and fifth reversing assemblies 110, which causes the cooling oil to pass through the first avoidance ports on the second and fifth reversing assemblies 110 to realize the connection between the two spaces in the first oil circuit network, thereby making the second and fifth reversing assemblies 110 a secondary reversing mechanism. The design of separating the space in the first oil circuit network reduces the cross-sectional area of ​​the oil channel in a single direction and increases the flow rate of the cooling oil. Under the same oil temperature, more heat can be taken away in time, and the heat dissipation effect is better, which helps to further improve the power density and volume density of the motor. At the same time, the design of adding a commutation structure can realize the scheme of cooling oil entering from the bottom of the stator core and flowing out from the top of the stator core. The above scheme makes it difficult for the cooling oil to generate bubbles in the cooling oil circuit network, and the cooling effect is better. The above design ensures that the cooling oil can flow smoothly everywhere in the stator core, which helps to achieve uniform cooling of the stator core.

[0044] At the same time, by cooperating with the first oil channel and the first avoidance openings on the first and sixth reversing components 110, the purpose of opening the first oil outlet channel 901 on the stator core can be achieved; by cooperating with the first oil channel and the first avoidance openings on the second and fifth reversing components 110, the purpose of opening the second oil outlet channel 902 on the stator core can be achieved; by cooperating with the first oil channel and the first avoidance openings on the third and fourth reversing components 110, the purpose of opening the third oil outlet channel 903 on the stator core can be achieved. By setting the first oil outlet channel 901, the cooling oil in the cooling oil circuit network can be discharged from the first oil outlet channel 901 at a fixed point, ensuring that the cooling oil flows fully and evenly in the cooling oil circuit network, and by setting the second oil outlet channel 902 and the third oil outlet channel 903, the connection between the first oil circuit network and the second oil circuit network is achieved. The second oil outlet channel 902 is 180° offset from the first oil outlet channel 901 and the third oil outlet channel 903, so that the cooling oil flowing into the first oil circuit network from the third oil outlet channel 903 must travel the farthest distance in the two separated spaces before it can flow out, thereby extending the residence time of the cooling oil in the first oil circuit network, thereby effectively reducing the situation where there is no cooling oil flowing through the first oil circuit network, and improving the cooling of the oil channel components by the cooling oil. By cooperating with the second oil channel and the second avoidance port, the purpose of opening the oil inlet 904 on the stator core can be achieved. By setting the oil inlet 904, the cooling oil can enter the second oil circuit network, and the third oil outlet channel 903 and the second avoidance port are 180° offset, so that the cooling oil flowing from the oil inlet 904 into the second oil circuit network must travel the farthest distance before flowing to the first oil circuit network, thereby extending the residence time of the cooling oil in the second oil circuit network, thereby effectively reducing the situation where there is no cooling oil flowing through the first oil circuit network, and improving the cooling of the oil channel components by the cooling oil.

[0045] By designing that the first punching sheet 200, the second punching sheet 300 and the third punching sheet 400 form a plurality of components, the punching sheets of different components can be rotated by a predetermined angle to realize the planning of the oil circuit structure. At the same time, the production cost of the stator core is effectively reduced, the manufacturing difficulty of the stator core is reduced, and the manufacturing efficiency of the stator core is improved.

[0046] The oil channel assembly is divided into a plurality of first assemblies 120, two second assemblies 130, a plurality of third assemblies 140, a plurality of fourth assemblies 150 and two fifth assemblies 160 of different thicknesses, and a plurality of third assemblies 140 are sandwiched between every two oil inlet assemblies 170; a part of the first assemblies 120 and a second assemblies 130 are sandwiched between the first and second reversing assemblies 110, the remaining first assemblies 120 and another second assemblies 130 are sandwiched between the fifth and sixth reversing assemblies 110, a plurality of fourth assemblies 150 and a fifth assemblies 160 are sandwiched between the second and third reversing assemblies 110, and a plurality of fourth assemblies 150 and another fifth assemblies 160 are sandwiched between the fourth and fifth reversing assemblies 110; a plurality of fourth assemblies 150 are sandwiched between the third reversing assembly 110 and the oil inlet assembly 170 at one end, and a plurality of fourth assemblies 150 are sandwiched between the fourth reversing assembly 110 and the oil inlet assembly 170 at the other end.

[0047] The thicknesses of the first assembly 120 , the second assembly 130 , the third assembly 140 , the fourth assembly 150 and the fifth assembly 160 are different because the number of the second punching sheets 300 stacked in the oil channel assembly is different.

[0048] Through the above structural improvements, the stable operation of the oil-cooled motor with a stator core is guaranteed, making it easier to use the oil-cooled motor as a drive motor and electric drive assembly for new energy vehicles.

[0049] In this embodiment, the first punching piece 200 has a first stator yoke 204, and the first notch 201 is formed on the first stator yoke 204. The second punching piece 300 has a second stator yoke 304, and a plurality of first through holes 301 are formed on the second stator yoke 304. The third punching piece 400 has a third stator yoke 404, and the second notch 406 and the plurality of second through holes 401 are both formed on the third stator yoke 404. Specifically, all of the above stator yokes are annular.

[0050] The above design realizes the limitation of the structural layout of the stator core, ensuring that the corresponding gaps and the oil channels can be smoothly connected. This simplifies the specific structure of the stator core, reduces the production cost of the stator core, and ensures the smooth flow of cooling oil in the cooling oil network.

[0051] By setting the first notch 201 on the first stator yoke 204, setting the first through hole 301 on the second stator yoke 304, and setting the second notch 406 on the third stator yoke 404, the production cost of the first punch 200 and the third punch 400 is reduced, which helps to ensure the smooth operation of the first oil outlet channel 901, the second oil outlet channel 902, the third oil outlet channel 903 and the oil inlet 904.

[0052] Exemplarily, a first supporting rib 305 is provided between two adjacent first through holes 301 , and a second supporting rib 405 is provided between two adjacent second through holes 401 and between a second through hole 401 and an adjacent second notch 406 .

[0053] With the help of the setting of a variety of different supporting ribs, the structural strength of the punching plate is guaranteed, the smooth formation of the cooling oil network is ensured, and it can also play the role of blocking boundaries and diverting liquids.

[0054] This embodiment adopts a layout in which corresponding support ribs between adjacent components are cross-stacked, thereby ensuring the overlapping effect of the stator slots between adjacent components.

[0055] Exemplarily, the inner side wall of the first punch 200 has a plurality of first stator slots 203, the inner side wall of the second punch 300 has a plurality of second stator slots 303, and the inner side wall of the third punch 400 has a plurality of third stator slots 403, and the plurality of first stator slots 203, the plurality of second stator slots 303 and the plurality of third stator slots 403 are aligned with each other.

[0056] A plurality of first stator teeth 202 are fixedly connected to the inner side wall of the first punching sheet 200, a plurality of second stator teeth 302 are fixedly connected to the inner side wall of the second punching sheet 300, a plurality of third stator teeth 402 are fixedly connected to the inner side wall of the third punching sheet 400, and the plurality of first stator teeth 202, the plurality of second stator teeth 302 and the plurality of third stator teeth 402 are aligned with each other.

[0057] By aligning all the stator teeth with all the stator slots respectively, it is possible to avoid interference with subsequent winding, thereby helping to ensure the relative positional relationship between the components.

[0058] Furthermore, the first stator slot 203, the second stator slot 303 and the third stator slot 403 are all 48. The above definition makes the stator core suitable for the motor solution with 8 poles and 48 slots, which is convenient for meeting the needs of new energy vehicles for drive motors and electric drive assemblies.

[0059] In this embodiment, the number of the first support ribs 305 and the number of the first through holes 301 are both 44, the number of the second support ribs 405 is 41, and the number of the second through holes 401 is 40.

[0060] Under the condition that the number of stator slots is 48, the number of first support ribs 305 and first through holes 301 can only be 44 to form the oil circuit structure of this embodiment, and the cooling oil circuit network formed thereby can increase the flow rate of cooling oil and improve the heat dissipation of the motor. If the number of first support ribs 305, first through holes 301, second support ribs 405 and second through holes 401 is set to be less, the cooling oil circuit network structure cannot be formed, which causes the flow rate of cooling oil to be too low and the heat dissipation effect to be low; if more are set, although the cooling oil circuit network can be formed, due to the excessively high flow rate of cooling oil, a very large flow resistance will be generated.

[0061] In this embodiment, with respect to the adjacent reversing assembly 110 and the oil channel assembly, in the thickness direction of the stator core, the projection of the edge of the first avoidance opening is spaced from the projection of the first oil channel; with respect to the adjacent oil inlet assembly 170 and the oil channel assembly, in the thickness direction of the stator core, the projection of the edge of the second avoidance opening is spaced from the projection of the first oil channel. The above design ensures the sealing of the edges of the first avoidance opening and the second avoidance opening, avoids the accidental outflow of the liquid in the first oil circuit network and the second oil circuit network, ensures that the cooling oil flows along the expected trajectory, and thus ensures the long-term stable operation of the stator core.

[0062] Specifically, all punching sheets are made of silicon steel sheets; the number of corresponding punching sheets in each component can be determined according to structural requirements, which will not be elaborated here.

[0063] This embodiment also provides a stator, including a stator winding and the above-mentioned stator core; the stator core has stator teeth; the stator winding is wound on the stator teeth. The stator teeth include all the first stator tooth portion 202, the second stator tooth portion 302 and the third stator tooth portion 402.

[0064] This embodiment also provides a motor, including a housing and the above-mentioned stator; the housing has a housing oil supply port; the stator is arranged in the housing, and the stator core is connected to the housing oil supply port.

[0065] This embodiment also provides a vehicle, including a vehicle body and the above-mentioned motor, wherein the motor is arranged on the vehicle body.

[0066] like Figures 1 to 9 As shown, this embodiment also provides a method for manufacturing a stator core, which is used to manufacture the above-mentioned stator core, comprising the following steps:

[0067] Step 1: stack a plurality of first punching sheets 200 to form the first reversing assembly 110 .

[0068] Step 2: Stack a number of second punches 300 on the first reversing component 110 as a first component 120, and the second punches 300 do not rotate during stacking. Stack a number of second punches 300 on the first component 120 as multiple first components 120, and the second punches 300 rotate K° during stacking.

[0069] Step 3: stack a plurality of second punching sheets 300 on a portion of the first component 120 to form a second component 130, and rotate the second punching sheets 300 by K° during stacking.

[0070] Step 4: stack a plurality of second punching sheets 300 on the second component 130 to form two third components 140 . The second punching sheets 300 are rotated 2K° during stacking.

[0071] Step 5: Stack a plurality of first punching sheets 200 on the third component 140 to serve as the second reversing component 110 . The first punching sheets 200 are rotated by K° during stacking.

[0072] Step six: stack a number of second punches 300 on the second reversing component 110 as a fourth component 150, the second punches 300 do not rotate during stacking; stack a number of second punches 300 on the fourth component 150 as multiple fourth components 150, the second punches 300 rotate K° during stacking.

[0073] Step 7: Stack a plurality of second punching sheets 300 on the fourth component 150 to form a fifth component 160. The second punching sheets 300 are rotated K° during stacking.

[0074] Step eight: stack a plurality of second punching sheets 300 on a fifth component 160 to form two third components 140 , and rotate the second punching sheets 300 by 2K° during stacking.

[0075] Step nine: stack a plurality of first punching sheets 200 on the third component 140 to serve as the third reversing component 110 . The first punching sheets 200 are rotated K° during stacking.

[0076] Step 10: Stack a number of second punches 300 on the third reversing component 110 as a fourth component 150, and the second punches 300 do not rotate during stacking. Stack a number of second punches 300 on the fourth component 150 as multiple fourth components 150, and the second punches 300 rotate K° during stacking.

[0077] Step 11: Stack a number of third punching sheets 400 as an oil inlet assembly 170, and rotate the second punching sheet 300 by K° during stacking. Stack a number of second punching sheets 300 on the oil inlet assembly 170 as a third assembly 140, and rotate the second punching sheets 300 by K° during stacking. Stack a number of second punching sheets 300 on the third assembly 140 as multiple third assemblies 140, and rotate the second punching sheets 300 by 2K° during stacking.

[0078] Step 12: Perform step 11 N times, and then stack a number of third punching sheets 400 on the fourth component 150 as an oil inlet component 170. The second punching sheet 300 is rotated K° during stacking, where N is a positive integer.

[0079] Step 13: stack a plurality of second punching sheets 300 on the oil inlet assembly 170 to form a plurality of fourth assemblies 150 , and rotate the second punching sheets 300 by K° during stacking.

[0080] Step 14: stack a plurality of first punching sheets 200 on the fourth component 150 to serve as the fourth reversing component 110. The first punching sheets 200 do not rotate during stacking.

[0081] Step 15: stack a plurality of second punching sheets 300 on the fourth reversing assembly 110 to form a plurality of fourth assemblies 150, and rotate the second punching sheets 300 by K° during stacking.

[0082] Step 16: Stack a plurality of second punching sheets 300 on the fourth component 150 to form another fifth component 160. The second punching sheets 300 are rotated K° during stacking.

[0083] Step 17: stack a plurality of second punching sheets 300 on another fifth component 160 to form two third components 140. The second punching sheets 300 are rotated 2K° during stacking.

[0084] Step 18: Stack a plurality of first punching sheets 200 on the third component 140 to serve as the fifth reversing component 110 . The first punching sheets 200 do not rotate during stacking.

[0085] Step 19: stack a number of second punching sheets 300 on the fifth reversing assembly 110 to serve as the remaining first assembly 120 . The second punching sheets 300 are rotated by K° during stacking.

[0086] Step 20: Stack a number of second punching sheets 300 on the remaining first components 120 to form another second component 130. The second punching sheets 300 are rotated K° during stacking.

[0087] Step 21: stack a plurality of second punching sheets 300 on another second component 130 to form two third components 140. The second punching sheets 300 are rotated 2K° during stacking.

[0088] Step 22: Stack a plurality of first punching sheets 200 on the third component 140 to serve as the sixth reversing component 110. The first punching sheets 200 do not rotate during stacking.

[0089] The manufacturing method of the stator core adopts the method of stacking different punching sheets to form various components, and the layout of the cooling oil circuit network structure is realized by planning the rotation angle or non-rotation angle of the corresponding punching sheets. In this way, efficient manufacturing of the stator core is realized, and the position adjustment of the components can be realized by coordinating the means of rotating the working angle of the punching sheets during stacking, thereby realizing the rapid construction of the cooling oil circuit network structure, realizing the effective limitation of the cooling oil flow trajectory, simplifying the processing flow of the stator core, reducing the production difficulty of the stator core, reducing the workload of the operators, and reducing the manufacturing cost of the stator core.

[0090] In this embodiment, N is 5. That is, there are five oil inlet assemblies 170. The above definition increases the number of oil inlets 904, reduces the difficulty of cooling oil entering the stator core, facilitates the rapid flow of cooling oil in the cooling oil network, and helps to ensure the heat dissipation effect of the stator core.

[0091] For example, K° is 45°. 45° can be adapted to the number of the first through holes 301 and the second through holes 401. Whenever the punch rotates 45°, the projection of the support rib in one component falls exactly in the middle of the projection of the oil passage in another component, thereby efficiently realizing the layout of the cross-overlapping of the corresponding support ribs between adjacent components.

[0092] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A stator core, characterized in that: include: Six reversing assemblies (110), the reversing assemblies (110) being formed by stacking a plurality of first punching sheets (200), the first punching sheets (200) being provided with first notches (201), all the first notches (201) in the reversing assemblies (110) being connected to form first avoidance openings, the first avoidance openings on the third, fourth and sixth reversing assemblies (110) being at the same position as the first avoidance opening on the first reversing assemblies (110), and the first avoidance openings on the second and fifth reversing assemblies (110) being offset by 180° from the first avoidance opening on the first reversing assemblies (110); A plurality of oil channel assemblies are arranged between the reversing assemblies (110), the oil channel assemblies are formed by stacking a plurality of second punching sheets (300), the second punching sheets (300) are uniformly provided with a plurality of first through holes (301) in a circumferential direction, each of the first through holes (301) can be connected with other first through holes (301) along an extension direction to form a first oil channel, and the plurality of first oil channels of two adjacent oil channel assemblies are staggeredly arranged; A plurality of oil inlet assemblies (170) are arranged between the third and fourth reversing assemblies (110), and a plurality of oil channel assemblies are sandwiched between every two of the oil inlet assemblies (170). The oil inlet assemblies (170) are formed by stacking a plurality of third punching sheets (400), and the third punching sheets (400) have a second notch (406) and a plurality of second through holes (401). All of the second notches (406) in the oil inlet assemblies (170) are connected to form a second avoidance opening, and the second avoidance opening is 180° offset from the first avoidance opening on the first reversing assembly (110). Each of the second through holes (401) can be connected to the corresponding second through hole (401) along the extension direction to form a second oil channel, and the second oil channel is arranged offset from the plurality of first oil channels on the adjacent oil channel assemblies.

2. The stator core according to claim 1, characterized in that: The oil channel assembly is divided into a plurality of first assemblies (120) of different thicknesses, two second assemblies (130), a plurality of third assemblies (140), a plurality of fourth assemblies (150) and two fifth assemblies (160); a plurality of the third assemblies (140) are sandwiched between every two of the oil inlet assemblies (170); a portion of the first assemblies (120) and one of the second assemblies (130) are sandwiched between the first and second reversing assemblies (110); the remaining first assemblies (120) and another of the first assemblies (130) are sandwiched between the fifth and sixth reversing assemblies (110); A plurality of fourth components (150) and a fifth component (160) are sandwiched between the second component (130), the second and third reversing components (110), and a plurality of fourth components (150) and another fifth component (160) are sandwiched between the fourth and fifth reversing components (110); a plurality of fourth components (150) are sandwiched between the third reversing component (110) and the oil inlet component (170) located at one end, and a plurality of fourth components (150) are sandwiched between the fourth reversing component (110) and the oil inlet component (170) located at the other end.

3. The stator core according to claim 2, characterized in that: A first supporting rib (305) is provided between two adjacent first through holes (301), and a second supporting rib (405) is provided between two adjacent second through holes (401) and between the second through hole (401) and the adjacent second notch (406).

4. The stator core according to claim 3, characterized in that: The number of the first supporting ribs (305) and the number of the first through holes (301) are both 44, the number of the second supporting ribs (405) is 41, and the number of the second through holes (401) is 40.

5. The stator core according to claim 2, characterized in that: With respect to the adjacent reversing assembly (110) and the oil channel assembly, in the thickness direction of the stator core, the projection of the edge of the first avoidance opening is spaced apart from the projection of the first oil channel; with respect to the adjacent oil inlet assembly (170) and the oil channel assembly, in the thickness direction of the stator core, the projection of the edge of the second avoidance opening is spaced apart from the projection of the first oil channel.

6. The stator core according to claim 2, characterized in that: The inner side wall of the first punching sheet (200) has a plurality of first stator slots (203), the inner side wall of the second punching sheet (300) has a plurality of second stator slots (303), and the inner side wall of the third punching sheet (400) has a plurality of third stator slots (403). The plurality of first stator slots (203), the plurality of second stator slots (303) and the plurality of third stator slots (403) are aligned with each other.

7. The stator core according to claim 6, characterized in that: The number of the first stator slots (203), the second stator slots (303) and the third stator slots (403) are 48 each.

8. A stator, characterized in that It comprises a stator winding and the stator core according to any one of claims 1 to 7, wherein the stator core has stator teeth; and the stator winding is wound on the stator teeth.

9. A motor, characterized in that It comprises a housing and the stator according to claim 8, wherein the housing has a housing oil supply port, the stator is arranged in the housing, and the stator core is communicated with the housing oil supply port.

10. A vehicle, characterized in that The vehicle comprises a vehicle body and the motor according to claim 9, wherein the motor is arranged on the vehicle body.

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