Stator core, stator assembly, motor and vehicle

Abstract

The invention provides a stator core, a stator assembly, a motor and a vehicle. The stator core comprises at least one first punching sheet and two second punching sheets; the at least one first punching sheet is arranged between the two second punching sheets; the outer side of the first punching sheet is provided with a diversion trench with an outward opening. A first spray hole is formed in the outer side of the second punching sheet; the first spray holes are opposite to the flow guide grooves, and the first spray holes and the flow guide grooves are matched to form first cooling channels. According to the invention, the cooling liquid can flow in the first cooling channel so as to cool the outer side part of the stator iron core, a part (shell) connected with the outer side of the stator iron core and parts (stator windings) located at the two ends of the stator iron core, so that the stator iron core is ensured to be low in cost, light in weight and simple in structure while the heat dissipation efficiency is considered.

Description

Technical Field

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

[0002] The motor includes a stator assembly and a rotor assembly. The stator assembly includes a stator core and a stator winding. The stator assembly generates a lot of heat, and the main heat is generated by the stator core and the stator winding. If the stator assembly of the motor cannot be effectively cooled and dissipated, the reliability, stability and efficiency of the motor operation will be directly reduced. The existing cooling method of the stator core is to cool the stator core through a heat dissipation structure, but the heat dissipation structure on the stator core cannot achieve low cost, light weight and simple structure while taking into account the heat dissipation efficiency. Summary of the invention

[0003] The present invention provides a stator core, a stator assembly, a motor and a vehicle to solve the problem that the heat dissipation structure on the existing stator core cannot achieve low cost, light weight and simple structure while taking into account the heat dissipation efficiency.

[0004] A stator core comprises at least one first punching sheet and two second punching sheets: At least one of the first punching sheets is arranged between two of the second punching sheets; The outer side of the first punching sheet is provided with a guide groove opening outward; A first spray hole is provided on the outer side of the second punching sheet; The first spray hole is arranged opposite to the guide groove, and the first spray hole and the guide groove cooperate to form a first cooling channel.

[0005] Preferably, a first opening groove opening inwards is provided on the inner side of the first punching sheet; a second opening groove opening inwards is provided on the inner side of the second punching sheet; the second opening groove is arranged opposite to the first opening groove, and the second opening groove cooperates with the first opening groove to form a second cooling channel.

[0006] Preferably, the stator core further includes a flow guide; the flow guide is installed on a side of the second punching sheet away from the first punching sheet and is arranged opposite to the first spray hole.

[0007] Preferably, the flow guide comprises a main body block and a connecting buckle arranged on the main body block; The connecting buckle is installed on the second punching sheet, and the main body block is fitted with the second punching sheet; The main body block is provided with a first flow guide hole, and the first flow guide hole is connected with the first spray hole; The first guide holes are arranged obliquely from outside to inside along the axial direction of the stator core.

[0008] Preferably, there are multiple first punches, and the multiple first punches are rotated and stacked in sequence along the axial direction.

[0009] Preferably, the second punching sheet further comprises a second spray hole, and the second spray hole and the first spray hole are arranged at intervals along the radial direction of the stator core; The stator core further includes a third punching sheet; the third punching sheet is arranged between the first punching sheet and the second punching sheet; A third opening slot with an inward opening is provided on the inner side of the third punching sheet, and a second flow guide hole is provided on the third punching sheet along the radial direction of the stator core; one end of the second flow guide hole is provided between two adjacent third opening slots, and at least one third opening slot is provided between two adjacent second flow guide holes; The third opening slot is arranged opposite to the first opening slot and the second opening slot; the first side of the second guide hole is arranged opposite to the guide slot, and the second side of the second guide hole is arranged opposite to the first spray hole and the second spray hole.

[0010] Preferably, the first punching sheet, the second punching sheet and the third punching sheet are all provided with a first dredging groove; The first dredging groove on the first punch is connected to the first opening groove, the first dredging groove on the second punch is connected to the second opening groove, and the first dredging groove on the third punch is connected to the third opening groove; The third punch is also provided with a second dredging groove, and the second dredging groove is communicated with the first dredging groove and the second guide hole.

[0011] A stator assembly comprises a stator winding and the stator core; The stator winding is installed in the stator core; The inner side of the stator core is in close contact with the stator winding.

[0012] A motor comprises a rotor assembly and the stator assembly; The rotor assembly is mounted within the stator assembly.

[0013] Preferably, a third cooling channel is provided in the rotor assembly, one end of the third cooling channel is communicated with the outside, and the other end of the third cooling channel faces the stator assembly.

[0014] Preferably, the motor further comprises a shell, the shell comprising a main body, a first protrusion and two second protrusions arranged outside the main body, the main body is sleeved outside the stator assembly, the inner wall of the main body is in contact with the outer side of the stator assembly, and the main body is provided with a third spray hole facing the stator assembly; The two second protrusions are spaced apart along the axial direction of the main body, and two ends of the first protrusion are respectively connected to the two second protrusions; A first guide channel is provided on the first protrusion, and a second guide channel is provided on the second protrusion; both ends of the first guide channel are respectively connected with two second guide channels, the first guide channel is also connected with the outside of the stator assembly, the second guide channel is connected with the third spray hole, and the first guide channel, the second guide channel and the third spray hole cooperate to form a fourth cooling channel.

[0015] Preferably, the main body, the first protrusion and the two second protrusions are integrally formed; the third spray hole, the first protrusion and the two second protrusions are all arranged in the upper half of the main body.

[0016] Preferably, the first flow guiding channel comprises a first main flow channel and a first branch flow channel; the first main flow channel is arranged in a radial direction, and the first branch flow channel is arranged in an axial direction; One end of the first main flow channel is in communication with the outside, and the other end of the first main flow channel faces the stator assembly; The first branch flow channel intersects and communicates with the first main flow channel, and two ends of the first branch flow channel are respectively communicated with two of the second flow guide channels.

[0017] Preferably, the second flow guiding channel comprises a second main flow channel and a second branch flow channel; the second main flow channel is arranged along the circumferential direction, and the second branch flow channel is arranged along the radial direction; The second main flow channel is communicated with the first flow guide channel, and the second branch flow channel intersects and communicates with the second main flow channel; One end of the second branch flow channel is communicated with the second main flow channel, and the other end of the second branch flow channel is communicated with the third spray hole.

[0018] A vehicle comprises the motor.

[0019] The stator core provided by the embodiment of the present invention includes at least one first punch and two second punches. The outer side of the first punch is provided with a guide groove opening outward, and the coolant (such as cooling oil) flows in the guide groove, which can cool the outer side of the first punch. The outer side of the second punch is provided with a first spray hole, and the coolant flows in the first spray hole, which can cool the outer side of the second punch. The first spray hole is arranged opposite to the guide groove, and the first spray hole and the guide groove cooperate to form a first cooling channel. The coolant can flow in the first cooling channel to achieve cooling of the outer part of the stator core itself, the parts (housing) connected to the outer side of the stator core, and the parts (stator windings) located at both ends of the stator core, so as to ensure that the stator core has low cost, light weight and simple structure while taking into account the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 is a first structural diagram of a stator core in one embodiment of the present invention; Figure 2 is a front view of a first punching sheet in one embodiment of the present invention; Figure 3 is an enlarged view of the structure of the first punching sheet in one embodiment of the present invention; Figure 4 This is a first structural diagram of a second punching sheet in one embodiment of the present invention; Figure 5 is a second structural diagram of a stator core in one embodiment of the present invention; Figure 6 is an isometric view of a flow guide member in one embodiment of the present invention; Figure 7 is a cross-sectional view of a flow guide member in one embodiment of the present invention; Figure 8 is a third structural diagram of a stator core in one embodiment of the present invention; Fig. 9 is a second structural diagram of a second punching sheet in one embodiment of the present invention; Fig.10 is an enlarged view of the structure of the second punching sheet in one embodiment of the present invention; Fig.11 is a front view of a third punching sheet in one embodiment of the present invention; Fig.12 is an enlarged view of the structure of the third punching sheet in one embodiment of the present invention; Fig.13 is an axonometric view of a motor in one embodiment of the present invention; Fig.14 is a cross-sectional view of a motor from a first viewing angle in one embodiment of the present invention; Fig.15 is a cross-sectional view of a motor from a second viewing angle in one embodiment of the present invention; Fig.16 1 is an isometric view of a housing in one embodiment of the present invention.

[0022] Among them, 1. the first punch; 11. the first opening groove; 12. the guide groove; 2. the second punch; 21. the second opening groove; 22. the first spray hole; 23. the second spray hole; 3. the guide piece; 31. the main body block; 32. the connecting buckle; 33. the first guide hole; 4. the third punch; 41. the third opening groove; 42. the second guide hole; 5. the stator winding; 6. the rotor assembly; 7. the third cooling channel; 71. the main cooling channel; 72. the branch cooling channel; 8. the shell; 81. the main body; 82. the first protrusion; 83. the second protrusion; 84. the third spray hole; 85. the first guide channel; 851. the first main channel; 852. the first branch channel; 86. the second guide channel; 861. the second main channel; 862. the second branch channel; 9. the first dredging groove; 10. the second dredging groove. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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.

[0026] An embodiment of the present invention provides a stator core, referring to Figure 1 , Figure 2 and Figure 4The stator core includes at least one first punching sheet 1 and two second punching sheets 2: at least one first punching sheet 1 is arranged between the two second punching sheets 2; the outer side of the first punching sheet 1 is provided with a guide groove 12 opening outward; the outer side of the second punching sheet 2 is provided with a first spray hole 22; the first spray hole 22 is arranged opposite to the guide groove 12, and the first spray hole 22 cooperates with the guide groove 12 to form a first cooling channel.

[0027] As an example, the stator core includes at least one first punching sheet 1 and two second punching sheets 2. A guide groove 12 with an opening facing outward is provided on the outer side of the first punching sheet 1, and a coolant (such as cooling oil) flows in the guide groove 12 to cool the outer side of the first punching sheet 1. A first spray hole 22 is provided on the outer side of the second punching sheet 2, and a coolant flows in the first spray hole 22 to cool the outer side of the second punching sheet 2.

[0028] During installation, at least one first punching sheet 1 is arranged between two second punching sheets 2, and the first punching sheet 1 and the second punching sheet 2 are connected together by a self-adhesive process or other processes; the first spray hole 22 is arranged opposite to the guide groove 12, and the first spray hole 22 cooperates with the guide groove 12 to form a first cooling channel, and the coolant can flow in the first cooling channel to realize cooling of the outer part of the stator core itself, the parts connected to the outer side of the stator core (shell 8) and the parts located at both ends of the stator core (stator winding 5). By using only two types of punching sheets, and opening the first spray hole 22 and the guide groove 12 for circulating the coolant on the two punching sheets, it is ensured that the stator core has low cost, light weight and simple structure while taking into account the heat dissipation efficiency. At the same time, since only two types of punching sheets are used, the processing technology of the stator core is also simpler. Among them, the coolant can enter the first cooling channel from the liquid inlet on the shell 8 and / or the liquid inlet of the rotor assembly 6.

[0029] In one embodiment, referring to Figure 1 , Figure 2 and Figure 4 A first opening groove 11 opening inward is provided on the inner side of the first punching sheet 1; a second opening groove 21 opening inward is provided on the inner side of the second punching sheet 2; the second opening groove 21 is arranged opposite to the first opening groove 11, and the second opening groove 21 cooperates with the first opening groove 11 to form a second cooling channel.

[0030] As an example, a first opening groove 11 with an opening facing inward is provided on the inner side of the first punching plate 1, and a coolant (such as cooling oil) flows in the first opening groove 11 to cool the inner side of the first punching plate 1. A second opening groove 21 with an opening facing inward is provided on the inner side of the second punching plate 2, and a coolant flows in the second opening groove 21 to cool the inner side of the second punching plate 2.

[0031] During installation, at least one first punching sheet 1 is arranged between two second punching sheets 2, and the first punching sheet 1 and the second punching sheet 2 are connected together by a self-adhesive process or other processes; the second opening slot 21 is arranged opposite to the first opening slot 11, and the second opening slot 21 cooperates with the first opening slot 11 to form a second cooling channel, and the coolant can flow in the second cooling channel to cool the inner part of the stator core itself and the parts connected to the inner side of the stator core (stator winding 5). The coolant can enter from the liquid inlet of the rotor assembly 6 and flow into the second cooling channel through the stator winding 5.

[0032] In this embodiment, a second cooling channel is provided on the inner side of the stator core, and a first cooling channel is provided on the outer side, so that the inner and outer sides of the stator core can be cooled, the cooling area can be expanded, the cooling can be more balanced, the cooling effect can be improved, and the service life of the stator core can be extended; by adjusting the amount of coolant, the number and size of the open slots, and the number and size of the first spray holes 22, the coolant is sprayed from the stator core along a parabola to the middle position of the outer end of the stator winding 5, thereby ensuring a more balanced cooling effect. Compared with the existing stator core, the stator core in this example reduces the punching sheets for liquid inlet in the middle of the core, has fewer types of punching sheets, reduces mold costs, and the slots set on the punching sheets are all open slots, which reduces costs and weight. In addition, the second punching sheet 2 can block the guide groove 12 of the first punching sheet 1, and the coolant flowing in the guide groove 12 will generate a certain pressure. The setting of the first spray hole 22 can spray the coolant to the outer part of the parts (stator winding 5) at both ends of the stator core, so as to cool the outer part of the parts (stator winding 5) at both ends of the stator core. Among them, the first opening slot 11, the guide slot 12, the second opening slot 21 and the first spray hole 22 are all distributed at intervals along the circumference of the stator core, which can make the cooling effect more balanced and improve the cooling efficiency.

[0033] In one embodiment, referring to Figure 5 and Figure 7 The stator core further includes a flow guide 3 ; the flow guide 3 is installed on a side of the second punching sheet 2 away from the first punching sheet 1 , and is arranged opposite to the first spray hole 22 .

[0034] As an example, the stator core also includes a guide member 3; during installation, the guide member 3 is installed on the side of the second punching sheet 2 away from the first punching sheet 1, and is arranged opposite to the first spray hole 22. In this way, the guide member 3 can be used to adjust the distance of the coolant sprayed from the first spray hole 22, so as to realize the spraying of the coolant to different positions of the stator winding 5, meet different cooling requirements, and improve the cooling effect.

[0035] In one embodiment, referring to Figure 6 and Figure 7The guide member 3 includes a main body block 31 and a connecting buckle 32 arranged on the main body block 31; the connecting buckle 32 is installed on the second punching sheet 2, and the main body block 31 is fitted with the second punching sheet 2; a first guide hole 33 is provided on the main body block 31, and the first guide hole 33 is connected with the first spray hole 22; the first guide hole 33 is inclined from the outside to the inside along the axial direction of the stator core.

[0036] As an example, the guide member 3 includes a main body block 31 and a connecting buckle 32, and the connecting buckle 32 is arranged on the main body block 31; during installation, the connecting buckle 32 is installed on the second punching sheet 2, and the main body block 31 is fitted with the second punching sheet 2. Specifically, a slot is provided on the second punching sheet 2, and the connecting buckle 32 is engaged in the slot to achieve installation and disassembly of the guide member 3. A first guide hole 33 is provided on the main body block 31, and the first guide hole 33 is connected to the first spray hole 22. In this way, the first guide hole 33 can be used to adjust the distance of the coolant sprayed from the first spray hole 22, so as to achieve the cooling liquid spraying to different positions of the stator winding 5, meet different cooling requirements, and improve the cooling effect. Among them, the fitting surface between the main body block 31 and the second punching sheet 2 is sealed by glue or a self-contained sealing gasket.

[0037] Reference Figure 7 When designing, the first guide hole 33 is tilted from outside to inside along the axial direction of the stator core, so that when the coolant flows in the guide member 3, potential energy is generated by its own gravity and the path drop, which is convenient for guiding the coolant.

[0038] In one embodiment, referring to Figure 1 , Figure 5 , Figure 8 and Fig.14 There are multiple first punching sheets 1, and the multiple first punching sheets 1 are rotated and stacked in sequence along the axial direction.

[0039] As an example, there are multiple first punching sheets 1. During installation, the multiple first punching sheets 1 are rotated and staggered in sequence along the axial direction and stacked, so that the overall left-right structure of the stator core is symmetrical. The rotation and staggered stacking of the multiple first punching sheets 1 can reduce the flow rate of the coolant, increase the heat exchange area, prolong the contact time between the coolant and the stator core, and increase the heat dissipation effect.

[0040] In one embodiment, referring to Figure 8 , Fig. 9 and Fig.11The second punching sheet 2 also includes a second spray hole 23, and the second spray hole 23 and the first spray hole 22 are arranged at intervals along the radial direction of the stator core; the stator core also includes a third punching sheet 4; the third punching sheet 4 is arranged between the first punching sheet 1 and the second punching sheet 2; the inner side of the third punching sheet 4 is provided with a third opening groove 41 with an opening facing inward, and the third punching sheet 4 is provided with a second guide hole 42 arranged along the radial direction of the stator core; one end of the second guide hole 42 is arranged between two adjacent third opening grooves 41, and at least one third opening groove 41 is arranged between two adjacent second guide holes 42; the third opening groove 41 is arranged opposite to the first opening groove 11 and the second opening groove 21; the first side of the second guide hole 42 is arranged opposite to the guide groove 12, and the second side of the second guide hole 42 is arranged opposite to the first spray hole 22 and the second spray hole 23.

[0041] As an example, the stator core also includes a third punching sheet 4; during installation, the third punching sheet 4 is arranged between the first punching sheet 1 and the second punching sheet 2; the inner side of the third punching sheet 4 is provided with a third opening groove 41 opening inward, and the third opening groove 41 is arranged opposite to the first opening groove 11 and the second opening groove 21, so that the third opening groove 41 cooperates with the first opening groove 11 and the second opening groove 21 to form a second cooling channel, and the coolant can flow in the second cooling channel to achieve cooling of the inner part of the stator core itself and the parts located at both ends of the stator core (stator winding 5). The third punching plate 4 is provided with a second guide hole 42; the second punching plate 2 also includes a second spray hole 23, the second spray hole 23 and the first spray hole 22 are arranged at intervals in the radial direction, and the second spray hole 42 is arranged relative to the guide groove 12, the first spray hole 22 and the second spray hole 23; in this way, the first spray hole 22, the second spray hole 23, the second guide hole 42 and the guide groove 12 cooperate to form a first cooling channel, and the coolant can flow in the first cooling channel to achieve cooling of the outer part of the stator core itself, the parts connected to the outer side of the stator core (housing 8) and the parts located at both ends of the stator core (stator winding 5). In this example, the second punching plate 2 is provided with two spray holes, the first spray hole 22 and the second spray hole 23, which can realize the simultaneous spraying of the coolant to different positions of the stator winding 5, thereby improving the cooling efficiency.

[0042] In one embodiment, referring to Figure 8 and Fig.11, the second guide hole 42 is set as a long strip hole set in the radial direction; during installation, the first spray hole 22 is set relative to the part of the long strip hole away from the axis, and the second spray hole 23 is set relative to the part of the long strip hole close to the axis, so that the coolant can be sprayed to the part of the stator winding 5 away from the stator core through the first spray hole 22, and the coolant can be sprayed to the part of the stator winding 5 close to the stator core through the second spray hole 23, which can realize the cooling of two positions of the stator winding 5 at the same time, thereby providing cooling efficiency. In this example, one end of the second guide hole 42 is set between two adjacent third opening slots 41, and one or more third opening slots 41 are set between two adjacent second guide holes 42; such a setting can make the coolant flowing out of the second cooling channel on the inner side of the stator core and the coolant flowing out of the first cooling channel on the outer side of the stator core cool different positions of the stator core at the same time, expand the cooling area, make the cooling more balanced, improve the cooling effect, and extend the service life of the stator core.

[0043] In one embodiment, referring to Figure 2 , Figure 3 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 The first punch 1, the second punch 2 and the third punch 4 are all provided with a first dredging groove 9; the first dredging groove 9 on the first punch 1 is connected with the first opening groove 11, the first dredging groove 9 on the second punch 2 is connected with the second opening groove 21, and the first dredging groove 9 on the third punch 4 is connected with the third opening groove 41; the third punch 4 is also provided with a second dredging groove 10, and the second dredging groove 10 is connected with the first dredging groove 9 and the second guide hole 42.

[0044] As an example, the first dredging groove 9 is provided on the first punch 1, the second punch 2 and the third punch 4; the first dredging groove 9 on the first punch 1 is connected to the first opening groove 11, the first dredging groove 9 on the second punch 2 is connected to the second opening groove 21, and the first dredging groove 9 on the third punch 4 is connected to the third opening groove 41; in this way, when the first punch 1, the second punch 2 and the third punch 4 are assembled together, the third opening groove 41 is arranged opposite to the first opening groove 11 and the second opening groove 21, so that the third opening groove 41 is connected to the first The opening groove 11 and the second opening groove 21 cooperate to form a second cooling channel, and the coolant can flow in the second cooling channel to cool the inner part of the stator core itself and the parts (stator winding 5) at both ends of the stator core; the first dredging groove 9 is used for supercooling liquid, which facilitates the coolant to enter the second cooling channel. If there is no first dredging groove 9, when the parts (stator winding 5) at both ends of the stator core fill the third opening groove 41 of the third punching plate 4, it is easy to block the coolant and the coolant is not easy to enter the second cooling channel. The second dredging groove 10 is also provided on the third punching plate 4, and the second dredging groove 10 is connected with the first dredging groove 9 and the second guide hole 42, so that the coolant in the first cooling channel is easily drained into the second cooling channel.

[0045] An embodiment of the present invention provides a stator assembly, referring to Figure 7 , Fig.13 , Fig.14 and Fig.15 , including a stator winding 5 and a stator core; the stator winding 5 is installed in the stator core; the inner side of the stator core is in contact with the stator winding 5.

[0046] As an example, the stator assembly includes a stator winding 5 and a stator core; during installation, the stator winding 5 is inserted into the stator core and welded together so that the inner side of the stator core is in close contact with the stator winding 5; the specific stator core includes at least one first punching sheet 1 and two second punching sheets 2, the first opening groove 11 of the first punching sheet 1 and the second opening groove 21 of the second punching sheet 2 cooperate to form a second cooling channel, the second cooling channel is in close contact with the stator winding 5, and the coolant can flow in the second cooling channel to cool the inner part of the stator core itself and the stator winding 5 connected to the inner side of the stator core; a guide groove 12 is provided on the outer side of the first punching sheet 1, and a first spray hole 22 is provided on the outer side of the second punching sheet 2, and the first spray hole 22 is in close contact with the guide groove 12. The grooves 12 are arranged relatively, and the first spray hole 22 cooperates with the guide groove 12 to form a first cooling channel. The coolant can flow in the first cooling channel to cool the outer part of the stator core itself, the parts connected to the outer side of the stator core (shell 8) and the outer parts of the parts located at both ends of the stator core (stator winding 5); such an arrangement can cool from both the inside and outside of the stator core, expand the cooling area, make the cooling more balanced, improve the cooling effect, and extend the service life of the stator core; by adjusting the amount of coolant, the number and size of the open grooves, and the number and size of the first spray holes 22, the coolant is sprayed from the stator core along a parabola to the middle position of the outer end of the stator winding 5, thereby ensuring a more balanced cooling effect. Compared with the existing stator core, the stator core in this example reduces the punching sheets for liquid inlet in the middle of the core, has fewer types of punching sheets, reduces mold costs, and the slots set on the punching sheets are all open slots, which reduces costs and weight.

[0047] An embodiment of the present invention provides a motor, referring to Fig.13 , Fig.14 and Fig.15 , including a rotor assembly 6 and a stator assembly; the rotor assembly 6 is installed in the stator assembly.

[0048] As an example, the motor includes a rotor assembly 6 and a stator assembly. During installation, the rotor assembly 6 is installed in the stator assembly; the stator assembly includes a stator winding 5 and a stator core; the stator winding 5 is inserted into the stator core and welded together so that the inner side of the stator core is in close contact with the stator winding 5; the specific stator core includes at least one first punching sheet 1 and two second punching sheets 2, the first opening groove 11 of the first punching sheet 1 and the second opening groove 21 of the second punching sheet 2 cooperate with the stator winding 5 to form a second cooling channel, and the coolant can flow in the second cooling channel to cool the inner part of the stator core itself and the stator winding 5 connected to the inner side of the stator core; the outer side of the first punching sheet 1 is provided with a guide groove 12, and the outer side of the second punching sheet 2 is provided with a first spray hole 2 2. The first spray hole 22 is arranged opposite to the guide groove 12. The first spray hole 22 cooperates with the guide groove 12 to form a first cooling channel. The coolant can flow in the first cooling channel to cool the outer part of the stator core itself, the parts (shell 8) connected to the outer side of the stator core, and the outer parts of the parts (stator winding 5) located at both ends of the stator core; such an arrangement can cool from both sides of the stator core, expand the cooling area, make the cooling more balanced, improve the cooling effect, and extend the service life of the stator core; by adjusting the amount of coolant, the number and size of the open slots, and the number and size of the first spray holes 22, the coolant is sprayed from the stator core along a parabola to the middle position of the outer end of the stator winding 5, thereby ensuring a more balanced cooling effect. Compared with the existing stator core, the stator core in this example reduces the punching sheets for liquid inlet in the middle of the core, has fewer types of punching sheets, reduces mold costs, and the slots set on the punching sheets are all open slots, which reduces costs and weight.

[0049] In one embodiment, referring to Fig.14 A third cooling channel 7 is provided in the rotor assembly 6, one end of the third cooling channel 7 is communicated with the outside, and the other end of the third cooling channel 7 faces the stator assembly.

[0050] As an example, a third cooling channel 7 is provided in the rotor assembly 6, one end of the third cooling channel 7 is connected to the outside, and the other end of the third cooling channel 7 faces the stator assembly, so that the coolant can enter the rotor assembly 6 from the third cooling channel 7. When the motor is working, the rotor assembly 6 will rotate, and the coolant can be thrown from the third cooling channel 7 to the stator assembly by utilizing the rotational inertia force, so as to achieve cooling of the stator assembly. Among them, the third cooling channel 7 includes a main cooling channel 71 arranged in the axial direction and a plurality of sub-cooling channels 72 arranged in the radial direction, and the plurality of sub-cooling channels 72 are distributed at intervals along the circumference of the rotor assembly 6, and are all connected to the main cooling channel 71; when in use, the coolant is first transported into the main cooling channel 71, and then transported to the stator assembly through the sub-cooling channel 72, so as to achieve cooling of the stator assembly; at the same time, the third cooling channel 7 also cools the rotor assembly 6.

[0051] In one embodiment, referring to Figure 13-16 The motor also includes a shell 8, which includes a main body 81, a first protrusion 82 and two second protrusions 83 arranged on the outer side of the main body 81, the main body 81 is sleeved outside the stator assembly, the inner wall of the main body 81 is in contact with the outer side of the stator assembly, and the main body 81 is provided with a third spray hole 84 facing the stator assembly; the two second protrusions 83 are spaced apart along the axial direction of the main body 81, and the two ends of the first protrusion 82 are respectively connected with the two second protrusions 83; a first guide channel 85 is provided on the first protrusion 82, and a second guide channel 86 is provided on the second protrusion 83; the two ends of the first guide channel 85 are respectively connected with the two second guide channels 86, the first guide channel 85 is also connected with the outer side of the stator assembly, the second guide channel 86 is connected with the third spray hole 84, and the first guide channel 85, the second guide channel 86 and the third spray hole 84 cooperate to form a fourth cooling channel.

[0052] As an example, the motor also includes a housing 8. When installed, the housing 8 is sleeved outside the stator assembly, and the inner wall of the housing 8 fits with the outer side of the stator assembly. Specifically, the stator assembly and the rotor assembly 6 are both installed in the housing 8; the outer side of the stator core of the stator assembly fits with the inner wall of the housing 8. The stator assembly includes a stator winding 5 and a stator core; when installed, the stator winding 5 is inserted into the stator core and welded together, so that the inner side of the stator core fits with the stator winding 5; specifically, the guide groove 12 of the first punching sheet 1 and the first spray hole 22 of the second punching sheet 2 cooperate to form a first cooling channel, and the first cooling channel fits with the inner wall of the housing 8. The coolant can flow in the first cooling channel to achieve cooling of the outer part of the stator core itself, the housing 8, and the stator winding 5 located at both ends of the stator core.

[0053] In one embodiment, referring to Fig.14 , Fig.15 and Fig.16The shell 8 includes a main body 81, a first protrusion 82 and two second protrusions 83; the main body 81 is used as a reference and is mounted outside the stator assembly. The inner wall of the main body 81 is in contact with the outer side of the stator assembly. The first protrusion 82 and the two second protrusions 83 are both arranged on the outer side of the main body 81. The two second protrusions 83 are spaced apart along the axial direction of the main body 81, and the two ends of the first protrusion 82 are respectively connected to the two second protrusions 83. During installation, a third spray hole 84 facing the stator assembly is provided on the main body 81, a first guide channel 85 is provided on the first protrusion 82, and a second guide channel 86 is provided on the second protrusion 83; both ends of the first guide channel 85 are respectively connected with the two second guide channels 86, the first guide channel 85 is also connected with the outside of the stator assembly, and the second guide channel 86 is connected with the third spray hole 84, so that the first guide channel 85, the second guide channel 86 and the third spray hole 84 cooperate to form a fourth cooling channel, and the coolant can flow from the first guide channel 85 to the stator assembly and the second guide channel 86 at the same time, and the coolant on the stator assembly can flow in the first cooling channel outside the stator assembly to cool the stator assembly; at the same time, the coolant in the second guide channel 86 is sprayed onto the stator assembly through the third spray hole 84 to further cool the stator assembly.

[0054] In one embodiment, referring to Fig.16 The main body 81 , the first protrusion 82 and the two second protrusions 83 are integrally formed; the third spray hole 84 , the first protrusion 82 and the two second protrusions 83 are all arranged in the upper half of the main body 81 .

[0055] As an example, the main body 81, the first protrusion 82 and the two second protrusions 83 are integrally formed, and the first guide channel 85 and the second guide channel 86 are formed by clever drilling and blocking, so as to avoid the shell 8 from forming an oil channel by welding, and the processing technology is simpler, and the welding cost is reduced. By utilizing the fluidity and gravity of the coolant itself, the third spray hole 84, the first protrusion 82 and the two second protrusions 83 are all arranged in the upper half of the main body 81, and the coolant can flow throughout the interior of the shell 8 to achieve uniform cooling of the structure inside the shell 8.

[0056] In one embodiment, referring to Fig.14 and Fig.16 The first guide channel 85 includes a first main channel 851 and a first branch channel 852; the first main channel 851 is arranged radially, and the first branch channel 852 is arranged axially; one end of the first main channel 851 is connected to the outside, and the other end of the first main channel 851 faces the stator assembly; the first branch channel 852 is cross-arranged and connected with the first main channel 851, and the two ends of the first branch channel 852 are respectively connected to the two second guide channels 86.

[0057] As an example, the first flow guide channel 85 includes a first main flow channel 851 and a first branch flow channel 852; when designing, the first main flow channel 851 is arranged radially, and the first branch flow channel 852 is arranged axially; one end of the first main flow channel 851 is connected to the outside, and the other end of the first main flow channel 851 faces the stator assembly, so that the coolant can flow directly from the first main flow channel 851 to the stator assembly to achieve cooling of the stator assembly. The first branch flow channel 852 intersects and communicates with the first main flow channel 851, and the two ends of the first branch flow channel 852 are respectively connected to the two second flow guide channels 86, so that the coolant can flow from the first main flow channel 851 to the first branch flow channel 852, and then flow from the first branch flow channel 852 into the second flow guide channel 86, and finally spray from the second flow guide channel 86 to the stator assembly through the third spray hole 84 to achieve further cooling of the stator assembly.

[0058] In one embodiment, referring to Fig.15 and Fig.16 The second guide channel 86 includes a second main channel 861 and a second branch channel 862; the second main channel 861 is arranged along the circumferential direction, and the second branch channel 862 is arranged along the radial direction; the second main channel 861 is connected to the first guide channel 85, and the second branch channel 862 is cross-arranged and connected to the second main channel 861; one end of the second branch channel 862 is connected to the second main channel 861, and the other end of the second branch channel 862 is connected to the third spray hole 84.

[0059] As an example, the second flow guide channel 86 includes a second main flow channel 861 and a second branch flow channel 862; when installed, the second main flow channel 861 is arranged along the circumferential direction, so that the second flow guide channel 86 is more matched with the shape of the shell 8, and the overlapping area between the second flow guide channel 86 and the shell 8 is increased, so as to expand the cooling efficiency of the shell 8 by the coolant. The second branch flow channel 862 is arranged along the radial direction, the second main flow channel 861 is connected with the first flow guide channel 85, and the second branch flow channel 862 is crossed and connected with the second main flow channel 861; one end of the second branch flow channel 862 is connected with the second main flow channel 861, and the other end of the second branch flow channel 862 is connected with the third spray hole 84; in this way, the coolant in the second main flow channel 861 can be sprayed from the second branch flow channel 862 through the third spray hole 84 to the stator assembly, so as to further cool the stator assembly. Among them, one end of the second branch flow channel 862 is connected with the outside world, and a plug is provided at one end of the second branch flow channel 862, so as to facilitate the cleaning of the coolant in the second flow guide channel 86. The plug can be a steel ball, a mesh plug or a threaded plug.

[0060] The motor in this embodiment includes a stator core, a stator winding 5, a rotor assembly 6 and a shell 8; during installation, the stator assembly consisting of the stator core and the stator winding 5 is sleeved on the rotor assembly 6, and the shell 8 is sleeved on the stator core; at the same time, the first cooling channel is arranged on the outside of the stator core, the second cooling channel is arranged on the inside of the stator core, the third cooling channel 7 is arranged in the rotor assembly 6, and the fourth cooling channel is arranged in the shell 8, the fourth cooling channel is connected with the first cooling channel, and the first cooling channel is connected with the second cooling channel; in this way, the coolant enters from the fourth cooling channel of the shell 8, can flow to the first cooling channel, then flow to the second cooling channel, or directly flow to the stator winding 5; the coolant enters from the third cooling channel 7 of the rotor assembly 6, and can directly flow to the stator winding 5. The coolant flowing through the first cooling channel can contact the outer part of the stator core and the shell 8, and can also flow to the outside of the stator winding 5, thereby cooling the outer part of the stator core, the shell 8 and the outside of the stator winding 5; then it is cooled and flows to the second cooling channel through the first dredging groove 9 and the second dredging groove 10, and the coolant flowing through the second cooling channel can contact the inner part of the stator core and the inside of the stator winding 5, thereby cooling the inner part of the stator core and the inside of the stator winding 5; the coolant flowing through the third cooling channel 7 contacts the rotor assembly 6 and the stator winding 5, thereby cooling the rotor assembly 6 and the stator winding 5; the coolant flowing through the fourth cooling channel contacts the outside of the shell 8 and the stator winding 5, thereby cooling the outside of the shell 8 and the stator winding 5. By setting the first cooling channel, the second cooling channel, the third cooling channel 7 and the fourth cooling channel, the motor can be cooled comprehensively and evenly, with good cooling effect and high cooling efficiency. While taking into account the cooling efficiency, it also achieves low cost, light weight, simple structure and simple processing technology.

[0061] An embodiment of the present invention provides a vehicle including a motor.

[0062] As an example, a vehicle includes a motor; the motor includes a rotor assembly 6 and a stator assembly. During installation, the rotor assembly 6 is installed in the stator assembly; the stator assembly includes a stator winding 5 and a stator core; the stator winding 5 is inserted into the stator core and welded together so that the inner side of the stator core is in close contact with the stator winding 5; the specific stator core includes at least one first punching sheet 1 and two second punching sheets 2, the first opening groove 11 of the first punching sheet 1 and the second opening groove 21 of the second punching sheet 2 cooperate with the stator winding 5 to form a second cooling channel, and the coolant can flow in the second cooling channel to cool the inner part of the stator core itself and the stator winding 5 connected to the inner side of the stator core; the outer side of the first punching sheet 1 is provided with a guide groove 12, and the outer side of the second punching sheet 2 is provided with a first The spray hole 22, the first spray hole 22 is arranged opposite to the guide groove 12, and the first spray hole 22 cooperates with the guide groove 12 to form a first cooling channel, and the coolant can flow in the first cooling channel to realize cooling of the outer part of the stator core itself, the parts connected to the outer side of the stator core (shell 8) and the outer part of the parts located at both ends of the stator core (stator winding 5); such an arrangement can be cooled from both sides of the stator core, expand the cooling area, make the cooling more balanced, improve the cooling effect, and extend the service life of the stator core; by adjusting the amount of coolant, the number and size of the open slots, and the number and size of the first spray hole 22, the coolant is sprayed from the stator core along a parabola to the middle position of the outer end of the stator winding 5, thereby ensuring a more balanced cooling effect. Compared with the existing stator core, the stator core in this example reduces the punching sheet for liquid inlet in the middle of the core, has fewer types of punching sheets, reduces mold costs, and the slots set on the punching sheets are all open slots, which reduces costs and weight.

[0063] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A stator core, characterized in that: It includes at least one first punch and two second punches: At least one of the first punching sheets is arranged between two of the second punching sheets; The outer side of the first punching sheet is provided with a guide groove opening outward; A first spray hole is provided on the outer side of the second punching sheet; The first spray hole is arranged opposite to the guide groove, and the first spray hole and the guide groove cooperate to form a first cooling channel.

2. The stator core according to claim 1, characterized in that: A first opening groove opening inwards is provided on the inner side of the first punching sheet; a second opening groove opening inwards is provided on the inner side of the second punching sheet; the second opening groove is arranged opposite to the first opening groove, and the second opening groove cooperates with the first opening groove to form a second cooling channel.

3. The stator core according to claim 1, characterized in that: The stator core further includes a flow guide; the flow guide is installed on a side of the second punching sheet away from the first punching sheet and is arranged opposite to the first spray hole.

4. The stator core according to claim 3, characterized in that: The flow guide comprises a main body block and a connecting buckle arranged on the main body block; The connecting buckle is installed on the second punching sheet, and the main body block is fitted with the second punching sheet; The main body block is provided with a first flow guide hole, and the first flow guide hole is connected with the first spray hole; The first guide holes are arranged obliquely from outside to inside along the axial direction of the stator core.

5. The stator core according to claim 1, characterized in that: There are multiple first punching sheets, and the multiple first punching sheets are rotated and stacked in sequence along the axial direction.

6. The stator core according to claim 2, characterized in that: The second punching sheet further includes a second spray hole, and the second spray hole and the first spray hole are arranged at intervals along the radial direction of the stator core; The stator core further includes a third punching sheet; the third punching sheet is arranged between the first punching sheet and the second punching sheet; A third opening slot with an inward opening is provided on the inner side of the third punching sheet, and a second flow guide hole is provided on the third punching sheet along the radial direction of the stator core; one end of the second flow guide hole is provided between two adjacent third opening slots, and at least one third opening slot is provided between two adjacent second flow guide holes; The third opening slot is arranged opposite to the first opening slot and the second opening slot; the first side of the second guide hole is arranged opposite to the guide slot, and the second side of the second guide hole is arranged opposite to the first spray hole and the second spray hole.

7. The stator core according to claim 6, characterized in that: The first punching sheet, the second punching sheet and the third punching sheet are all provided with a first dredging groove; The first dredging groove on the first punch is connected to the first opening groove, the first dredging groove on the second punch is connected to the second opening groove, and the first dredging groove on the third punch is connected to the third opening groove; The third punch is also provided with a second dredging groove, and the second dredging groove is communicated with the first dredging groove and the second guide hole.

8. A stator assembly, characterized in that: Comprising a stator winding and a stator core according to any one of claims 1 to 7; The stator winding is installed in the stator core; The inner side of the stator core is in close contact with the stator winding.

9. A motor, characterized in that: comprising a rotor assembly and the stator assembly according to claim 8; The rotor assembly is mounted within the stator assembly.

10. The motor according to claim 9, characterized in that A third cooling channel is provided in the rotor assembly, one end of the third cooling channel is communicated with the outside, and the other end of the third cooling channel faces the stator assembly.

11. The motor according to claim 9, characterized in that The motor further comprises a housing, the housing comprising a main body, a first protrusion and two second protrusions arranged outside the main body, the main body is sleeved outside the stator assembly, the inner wall of the main body is in contact with the outer side of the stator assembly, and the main body is provided with a third spray hole facing the stator assembly; The two second protrusions are spaced apart along the axial direction of the main body, and two ends of the first protrusion are respectively connected to the two second protrusions; A first guide channel is provided on the first protrusion, and a second guide channel is provided on the second protrusion; both ends of the first guide channel are respectively connected with two second guide channels, the first guide channel is also connected with the outside of the stator assembly, the second guide channel is connected with the third spray hole, and the first guide channel, the second guide channel and the third spray hole cooperate to form a fourth cooling channel.

12. The motor according to claim 11, characterized in that The main body, the first protrusion and the two second protrusions are integrally formed; the third spray hole, the first protrusion and the two second protrusions are all arranged at the upper half of the main body.

13. The motor according to claim 11, characterized in that The first flow guiding channel includes a first main flow channel and a first branch flow channel; the first main flow channel is arranged in a radial direction, and the first branch flow channel is arranged in an axial direction; One end of the first main flow channel is in communication with the outside, and the other end of the first main flow channel faces the stator assembly; The first branch flow channel intersects and communicates with the first main flow channel, and two ends of the first branch flow channel are respectively communicated with two of the second flow guide channels.

14. The motor according to claim 11, characterized in that The second flow guiding channel comprises a second main flow channel and a second branch flow channel; the second main flow channel is arranged along the circumferential direction, and the second branch flow channel is arranged along the radial direction; The second main flow channel is communicated with the first flow guide channel, and the second branch flow channel intersects and communicates with the second main flow channel; One end of the second branch flow channel is communicated with the second main flow channel, and the other end of the second branch flow channel is communicated with the third spray hole.

15. A vehicle, characterized in that: A motor comprising any one of claims 9 to 14.

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