Stator core, stator assembly, motor and vehicle

Abstract

The utility model 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 utility model, the cooling liquid can flow in the first cooling channel so as to cool the outer side part of the stator iron core, parts (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] This utility model relates to the field of motor technology, and in particular to a stator core, stator assembly, motor and vehicle. Background Technology

[0002] An electric motor consists of a stator assembly and a rotor assembly. The stator assembly comprises the stator core and stator windings. The stator assembly generates significant heat, primarily from the stator core and windings. Ineffective cooling of the stator assembly directly leads to low reliability, stability, and efficiency in motor operation. Current stator core cooling methods rely on heat dissipation structures, but these structures cannot simultaneously achieve high cooling efficiency while also being cost-effective, lightweight, and structurally simple. Summary of the Invention

[0003] This utility model provides a stator core, stator assembly, motor, and vehicle to solve the problem that the existing heat dissipation structure on the stator core cannot achieve both heat dissipation efficiency and low cost, light weight, and simple structure.

[0004] A stator core comprising at least one first lamination and two second laminations:

[0005] At least one of the first laminations is disposed between two of the second laminations;

[0006] The outer side of the first lamination is provided with an outward-facing guide groove;

[0007] The outer side of the second lamination is provided with a first nozzle;

[0008] The first nozzle is positioned opposite to the guide channel, and the first nozzle and the guide channel cooperate to form a first cooling channel.

[0009] Preferably, the inner side of the first lamination is provided with a first opening groove facing inward; the inner side of the second lamination is provided with a second opening groove facing inward; the second opening groove is disposed opposite to the first opening groove, and the second opening groove and the first opening groove cooperate to form a second cooling channel.

[0010] Preferably, the stator core further includes a flow guide; the flow guide is installed on the side of the second lamination away from the first lamination and is disposed opposite to the first nozzle.

[0011] Preferably, the flow guide includes a main body block and a connecting buckle disposed on the main body block;

[0012] The connecting buckle is installed on the second punch, and the main body block is attached to the second punch;

[0013] The main body block is provided with a first guide hole, which is connected to the first spray hole;

[0014] The first guide hole is inclined from the outside to the inside along the axial direction of the stator core.

[0015] Preferably, there are multiple first laminations, which are stacked and rotated in a staggered manner along the axial direction.

[0016] Preferably, the second lamination further includes a second nozzle, which is spaced apart from the first nozzle along the radial direction of the stator core;

[0017] The stator core further includes a third lamination; the third lamination is disposed between the first lamination and the second lamination;

[0018] The inner side of the third lamination is provided with a third opening groove facing inward, and the third lamination is provided with a second guide hole arranged in the radial direction of the stator core; one end of the second guide hole is arranged between two adjacent third opening grooves, and at least one third opening groove is arranged at intervals between two adjacent second guide holes.

[0019] The third opening groove is disposed opposite to the first opening groove and the second opening groove; the first side of the second guide hole is disposed opposite to the guide groove, and the second side of the second guide hole is disposed opposite to the first spray hole and the second spray hole.

[0020] Preferably, the first punch, the second punch, and the third punch are all provided with a first unblocking groove;

[0021] The first unblocking groove on the first punch is connected to the first opening groove, the first unblocking groove on the second punch is connected to the second opening groove, and the first unblocking groove on the third punch is connected to the third opening groove.

[0022] The third punch is also provided with a second unblocking groove, which is connected to the first unblocking groove and the second guide hole.

[0023] A stator assembly includes a stator winding and the stator core;

[0024] The stator windings are installed inside the stator core;

[0025] The inner side of the stator core is in close contact with the stator winding.

[0026] An electric motor includes a rotor assembly and the stator assembly;

[0027] The rotor assembly is installed within the stator assembly.

[0028] Preferably, the rotor assembly is provided with a third cooling channel, one end of which is connected to the outside and the other end of which faces the stator assembly.

[0029] Preferably, the motor further includes a housing, the housing including a main body, a first protrusion and two second protrusions disposed on the outer side of the main body, the main body being sleeved on the stator assembly, the inner wall of the main body being in contact with the outer side of the stator assembly, and the main body being provided with a third nozzle facing the stator assembly;

[0030] Two second protrusions are spaced apart along the axial direction of the main body, and the two ends of the first protrusion are respectively connected to the two second protrusions;

[0031] The first protrusion is provided with a first flow channel, and the second protrusion is provided with a second flow channel; the two ends of the first flow channel are respectively connected to the two second flow channels, the first flow channel is also connected to the outside of the stator assembly, the second flow channel is connected to the third nozzle, and the first flow channel, the second flow channel and the third nozzle cooperate to form a fourth cooling channel.

[0032] 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 disposed on the upper half of the main body.

[0033] Preferably, the first flow channel includes a first main flow channel and a first branch flow channel; the first main flow channel is arranged radially, and the first branch flow channel is arranged axially.

[0034] One end of the first main channel is connected to the outside, and the other end of the first main channel faces the stator assembly;

[0035] The first branch channel intersects and connects with the first main channel, and both ends of the first branch channel are respectively connected to the two second guide channels.

[0036] Preferably, the second flow channel includes a second main flow channel and a second branch flow channel; the second main flow channel is arranged circumferentially, and the second branch flow channel is arranged radially.

[0037] The second main channel is connected to the first diversion channel, and the second branch channel intersects with and is connected to the second main channel;

[0038] One end of the second diversion channel is connected to the second main channel, and the other end of the second diversion channel is connected to the third nozzle.

[0039] A vehicle including the aforementioned motor.

[0040] The stator core provided in this embodiment includes at least one first lamination and two second laminations. The outer side of the first lamination has an outward-facing guide groove, through which coolant (e.g., cooling oil) flows, cooling the outer side of the first lamination. The outer side of the second lamination has a first nozzle, through which coolant flows, cooling the outer side of the second lamination. The first nozzle and the guide groove are positioned opposite each other, forming a first cooling channel. Coolant can flow within this channel to cool the outer portion 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. This ensures that the stator core achieves low cost, light weight, and simple structure while maintaining efficient heat dissipation. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a first structural diagram of the stator core in one embodiment of this utility model;

[0043] Figure 2 This is a front view of the first lamination in one embodiment of the present invention;

[0044] Figure 3 This is an enlarged view of the structure of the first lamination portion in one embodiment of this utility model;

[0045] Figure 4 This is a first structural diagram of the second lamination in one embodiment of the present invention;

[0046] Figure 5 This is a second structural diagram of the stator core in one embodiment of this utility model;

[0047] Figure 6 This is an isometric view of the guide component in one embodiment of the present invention;

[0048] Figure 7 This is a cross-sectional view of the flow guide in one embodiment of the present invention;

[0049] Figure 8 This is a third structural diagram of the stator core in one embodiment of this utility model;

[0050] Figure 9 This is a second structural diagram of the second lamination in one embodiment of the present invention;

[0051] Figure 10 This is an enlarged view of the structure of the second lamination portion in one embodiment of this utility model;

[0052] Figure 11 This is a front view of the third lamination in one embodiment of the present invention;

[0053] Figure 12 This is an enlarged view of the third lamination portion structure in one embodiment of this utility model;

[0054] Figure 13 This is an isometric view of the motor in one embodiment of the present invention;

[0055] Figure 14 This is a cross-sectional view of the motor from a first perspective in one embodiment of this utility model;

[0056] Figure 15 This is a cross-sectional view of the motor from a second perspective in one embodiment of this utility model;

[0057] Figure 16 This is an axonometric view of the housing in one embodiment of the present invention.

[0058] Among them, 1. First lamination; 11. First opening slot; 12. Guide slot; 2. Second lamination; 21. Second opening slot; 22. First nozzle; 23. Second nozzle; 3. Guide component; 31. Main body block; 32. Connecting buckle; 33. First guide hole; 4. Third lamination; 41. Third opening slot; 42. Second guide hole; 5. Stator winding; 6. Rotor assembly; 7. Third cooling channel; 71. Main cooling channel; 72. Sub-cooling channel; 8. Housing; 81. Main body; 82. First protrusion; 83. Second protrusion; 84. Third nozzle; 85. First guide channel; 851. First main channel; 852. First sub-channel; 86. Second guide channel; 861. Second main channel; 862. Second sub-channel; 9. First unblocking groove; 10. Second unblocking groove. Detailed Implementation

[0059] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0060] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0061] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0062] This utility model provides a stator core, referring to... Figure 1 , Figure 2 and Figure 4 The stator core includes at least one first lamination 1 and two second laminations 2: at least one first lamination 1 is disposed between two second laminations 2; the outer side of the first lamination 1 is provided with an outward-facing guide groove 12; the outer side of the second lamination 2 is provided with a first nozzle 22; the first nozzle 22 is disposed opposite to the guide groove 12, and the first nozzle 22 and the guide groove 12 cooperate to form a first cooling channel.

[0063] As an example, the stator core includes at least one first lamination 1 and two second laminations 2. The outer side of the first lamination 1 has an outward-facing guide groove 12, within which coolant (e.g., cooling oil) flows to cool the outer side of the first lamination 1. The outer side of the second lamination 2 has a first nozzle 22, within which coolant flows to cool the outer side of the second lamination 2.

[0064] During installation, at least one first lamination 1 is placed between two second laminations 2. Specifically, the first lamination 1 and the second lamination 2 are connected together by a self-adhesive process or other processes. The first nozzle 22 and the guide groove 12 are arranged opposite to each other, and the first nozzle 22 and the guide groove 12 cooperate to form a first cooling channel. Coolant can flow in the first cooling channel to cool the outer part of the stator core itself, the parts connected to the outer part of the stator core (housing 8), and the parts located at both ends of the stator core (stator windings 5). By using only two types of laminations and opening the first nozzle 22 and guide groove 12 on the two types of laminations for the flow of coolant, the stator core can be made low-cost, light-weight, and simple in structure while taking into account heat dissipation efficiency. At the same time, since only two types of laminations are used, the processing technology of the stator core is also simpler. The coolant can enter the first cooling channel from the liquid inlet on the housing 8 and / or the liquid inlet of the rotor assembly 6.

[0065] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 4 The inner side of the first punch 1 is provided with a first opening groove 11 with the opening facing inward; the inner side of the second punch 2 is provided with a second opening groove 21 with the opening facing inward; the second opening groove 21 is arranged opposite to the first opening groove 11, and the second opening groove 21 and the first opening groove 11 cooperate to form a second cooling channel.

[0066] As an example, the inner side of the first lamination 1 is provided with an inwardly opening groove 11, in which coolant (e.g., cooling oil) flows to cool the inner side of the first lamination 1. The inner side of the second lamination 2 is provided with an inwardly opening groove 21, in which coolant flows to cool the inner side of the second lamination 2.

[0067] During installation, at least one first lamination 1 is placed between two second laminations 2. Specifically, the first lamination 1 and the second lamination 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 and the first opening slot 11 cooperate to form a second cooling channel. 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 inlet of the rotor assembly 6 and flow into the second cooling channel through the stator winding 5.

[0068] 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. This allows for cooling of both the inner and outer sides of the stator core, expanding the cooling area, making cooling more even, improving the cooling effect, and extending the service life of the stator core. By adjusting the coolant volume, the number and size of the opening slots, and the number and size of the first spray holes 22, the coolant is sprayed from the stator core along a parabolic trajectory to the middle position of the outer end of the stator winding 5, thereby ensuring a more even cooling effect. Compared with existing stator cores, the stator core in this example reduces the number of laminations used for liquid inlet in the middle of the core, resulting in fewer types of laminations, lower mold costs, and all slots on the laminations are open slots, further reducing cost and weight. In addition, the second lamination 2 can block the guide groove 12 of the first lamination 1. The coolant flowing in the guide groove 12 will generate a certain pressure. The first nozzle 22 can spray the coolant towards the outer part of the parts (stator winding 5) at both ends of the stator core, thereby cooling the outer part of the parts (stator winding 5) at both ends of the stator core. The first opening groove 11, the guide groove 12, the second opening groove 21 and the first nozzle 22 are all distributed circumferentially along the stator core, which can make the cooling effect more balanced and improve the cooling efficiency.

[0069] In one embodiment, reference is made to Figure 5 and Figure 7 The stator core also includes a flow guide 3; the flow guide 3 is installed on the side of the second lamination 2 away from the first lamination 1 and is positioned opposite to the first nozzle 22.

[0070] As an example, the stator core also includes a flow guide 3. During installation, the flow guide 3 is installed on the side of the second lamination 2 away from the first lamination 1 and is positioned opposite to the first nozzle 22. This arrangement allows the flow guide 3 to adjust the distance from which the coolant is sprayed from the first nozzle 22, thereby enabling the coolant to be sprayed to different positions of the stator winding 5 to meet different cooling requirements and improve the cooling effect.

[0071] In one embodiment, reference is made to Figure 6 and Figure 7 The flow guide 3 includes a main body block 31 and a connecting buckle 32 disposed on the main body block 31; the connecting buckle 32 is installed on the second lamination 2, and the main body block 31 is in contact with the second lamination 2; the main body block 31 is provided with a first flow guide hole 33, which is connected to the first spray hole 22; the first flow guide hole 33 is inclined from the outside to the inside along the axial direction of the stator core.

[0072] As an example, the flow guide 3 includes a main body block 31 and a connecting buckle 32, with the connecting buckle 32 mounted on the main body block 31. During installation, the connecting buckle 32 is mounted on the second lamination 2, with the main body block 31 fitting snugly against the second lamination 2. Specifically, the second lamination 2 has a slot, and the connecting buckle 32 engages with the slot, enabling the installation and removal of the flow guide 3. A first flow guide hole 33 is provided on the main body block 31, communicating with a first spray hole 22. This allows adjustment of the distance at which coolant is sprayed from the first spray hole 22, thereby directing coolant to different positions on the stator winding 5 to meet varying cooling requirements and improve cooling efficiency. The mating surfaces between the main body block 31 and the second lamination 2 are sealed using adhesive or a self-contained sealing gasket.

[0073] Reference Figure 7 During the design, the first guide hole 33 is inclined from the outside to the inside along the axial direction of the stator core. This allows the coolant to generate potential energy from its own gravity and path drop when flowing in the guide member 3, which facilitates the flow of the coolant.

[0074] In one embodiment, reference is made to Figure 1 , Figure 5 , Figure 8 and Figure 14 The number of first laminations 1 is multiple, and the multiple first laminations 1 are stacked in a staggered manner along the axial direction.

[0075] As an example, there are multiple first laminations 1. During installation, multiple first laminations 1 are rotated and stacked in a staggered manner along the axial direction. In this way, the overall left and right structure of the stator core is symmetrical. The rotation and staggered stacking of multiple first laminations 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.

[0076] In one embodiment, reference is made to Figure 8 , Figure 9 and Figure 11 The second lamination 2 also includes a second nozzle 23, which is spaced apart from the first nozzle 22 along the radial direction of the stator core. The stator core also includes a third lamination 4. The third lamination 4 is disposed between the first lamination 1 and the second lamination 2. The inner side of the third lamination 4 is provided with an inwardly opening third opening groove 41, and the third lamination 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 disposed between two adjacent third opening grooves 41, and at least one third opening groove 41 is spaced apart between two adjacent second guide holes 42. The third opening groove 41 is disposed opposite to the first opening groove 11 and the second opening groove 21. The first side of the second guide hole 42 is disposed opposite to the guide groove 12, and the second side of the second guide hole 42 is disposed opposite to the first nozzle 22 and the second nozzle 23.

[0077] As an example, the stator core also includes a third lamination 4; during installation, the third lamination 4 is placed between the first lamination 1 and the second lamination 2; the inner side of the third lamination 4 is provided with an inwardly opening third opening groove 41, which is opposite to the first opening groove 11 and the second opening groove 21. In this way, the third opening groove 41, the first opening groove 11 and the second opening groove 21 cooperate to form a second cooling channel, in which coolant can flow to cool the inner part of the stator core itself and the parts (stator windings 5) located at both ends of the stator core. The third lamination 4 is provided with a second guide hole 42; the second lamination 2 also includes a second spray hole 23, which is radially spaced from the first spray hole 22. The second guide hole 42 is positioned opposite 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, in which coolant can flow to cool the outer part of the stator core itself, the parts (housing 8) connected to the outer part of the stator core, and the parts (stator windings 5) located at both ends of the stator core. In this example, the second lamination 2 is provided with two spray holes, the first spray hole 22 and the second spray hole 23, which can simultaneously spray coolant onto different positions of the stator windings 5, thereby improving cooling efficiency.

[0078] In one embodiment, reference is made to Figure 8 and Figure 11 The second guide hole 42 is an elongated hole arranged radially. During installation, the first spray hole 22 is positioned opposite the portion of the elongated hole furthest from the axis, and the second spray hole 23 is positioned opposite the portion of the elongated hole closest to the axis. This allows coolant to be sprayed onto the portion of the stator winding 5 furthest from the stator core through the first spray hole 22, and onto the portion of the stator winding 5 closest to the stator core through the second spray hole 23. This enables simultaneous cooling of two positions of the stator winding 5, thereby improving cooling efficiency. In this example, one end of the second guide hole 42 is positioned between two adjacent third opening slots 41, and one or more third opening slots 41 are spaced apart between two adjacent second guide holes 42. This arrangement allows coolant flowing from the second cooling channel inside the stator core and coolant flowing from the first cooling channel outside the stator core to simultaneously cool different positions of the stator core, expanding the cooling area, making cooling more balanced, improving the cooling effect, and extending the service life of the stator core.

[0079] In one embodiment, reference is made to Figure 2 , Figure 3 , Figure 9 , Figure 10 , Figure 11 and Figure 12The first punch 1, the second punch 2, and the third punch 4 are all provided with a first unblocking groove 9; the first unblocking groove 9 on the first punch 1 is connected to the first opening groove 11, the first unblocking groove 9 on the second punch 2 is connected to the second opening groove 21, and the first unblocking groove 9 on the third punch 4 is connected to the third opening groove 41; the third punch 4 is also provided with a second unblocking groove 10, which is connected to the first unblocking groove 9 and the second guide hole 42.

[0080] As an example, a first unblocking groove 9 is provided on the first punch 1, the second punch 2, and the third punch 4; the first unblocking groove 9 on the first punch 1 is connected to the first opening groove 11, the first unblocking groove 9 on the second punch 2 is connected to the second opening groove 21, and the first unblocking groove 9 on the third punch 4 is connected to the third opening groove 41; with this arrangement, when the first punch 1, the second punch 2, and the third punch 4 are assembled together, the third opening groove 41 is positioned opposite to the first opening groove 11 and the second opening groove 21, thus the third opening groove 41 is connected to the first opening groove 11 and the second opening groove 21. The opening slot 11 and the second opening slot 21 cooperate to form a second cooling channel, in which coolant can flow to cool the inner part of the stator core and the parts (stator windings 5) located at both ends of the stator core. The first unblocking slot 9 is used for coolant passage, facilitating the entry of coolant into the second cooling channel. Without the first unblocking slot 9, when the parts (stator windings 5) located at both ends of the stator core fill the third opening slot 41 of the third lamination 4, the coolant is easily blocked, making it difficult for the coolant to enter the second cooling channel. A second unblocking slot 10 is also provided on the third lamination 4, which communicates with the first unblocking slot 9 and the second guide hole 42, thus facilitating the diversion of coolant from the first cooling channel to the second cooling channel.

[0081] This utility model embodiment provides a stator assembly, see reference Figure 7 , Figure 13 , Figure 14 and Figure 15 It includes stator winding 5 and stator core; stator winding 5 is installed inside stator core; the inner side of stator core is in close contact with stator winding 5.

[0082] 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. Specifically, the stator core includes at least one first lamination 1 and two second laminations 2. The first opening slot 11 of the first lamination 1 and the second opening slot 21 of the second lamination 2 cooperate to form a second cooling channel. The second cooling channel is in close contact with the stator winding 5, and 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 lamination 1 is provided with a guide groove 12, and the outer side of the second lamination 2 is provided with a first spray hole 22. The first spray hole 22 and the guide groove 12 are connected to the stator core. The slots 12 are arranged opposite each other, and the first spray hole 22 cooperates with the guide slot 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 (housing 8), and the outer parts of the parts located at both ends of the stator core (stator winding 5). This arrangement can cool from both the inner and outer sides of the stator core, expand the cooling area, make the cooling more even, improve the cooling effect, and extend the service life of the stator core. By adjusting the coolant volume, 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 even cooling effect. Compared with existing stator cores, the stator core in this example reduces the number of laminations in the middle of the core used for liquid inlet, has fewer types of laminations, reduces mold costs, and the slots on the laminations are all open slots, which reduces both cost and weight.

[0083] This utility model embodiment provides a motor, see reference Figure 13 , Figure 14 and Figure 15 It includes a rotor assembly 6 and a stator assembly; the rotor assembly 6 is installed inside the stator assembly.

[0084] As an example, the motor includes a rotor assembly 6 and a stator assembly. During installation, the rotor assembly 6 is installed inside 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. Specifically, the stator core includes at least one first lamination 1 and two second laminations 2. The first opening slot 11 of the first lamination 1 and the second opening slot 21 of the second lamination 2 cooperate with the stator winding 5 to form a second cooling channel. 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 lamination 1 is provided with a guide groove 12, and the outer side of the second lamination 2 is provided with a first spray hole 2. 2. The first spray nozzle 22 is positioned opposite to the guide groove 12, forming a first cooling channel. Coolant can flow within this channel to cool the outer portion of the stator core itself, the parts connected to the outer side of the stator core (housing 8), and the outer portions of the parts located at both ends of the stator core (stator windings 5). This arrangement allows cooling from both the inner and outer sides of the stator core, expanding the cooling area, making cooling more even, improving the cooling effect, and extending the service life of the stator core. By adjusting the coolant volume, the number and size of the opening grooves, and the number and size of the first spray nozzle 22, the coolant is sprayed parabolically from the stator core towards the middle of the outer end of the stator windings 5, ensuring a more even cooling effect. Compared to existing stator cores, the stator core in this example reduces the number of laminations in the middle for liquid inlet, resulting in fewer types of laminations, lower mold costs, and all slots on the laminations are open slots, further reducing cost and weight.

[0085] In one embodiment, reference is made to Figure 14 The rotor assembly 6 is provided with a third cooling channel 7. 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.

[0086] As an example, a third cooling channel 7 is provided within the rotor assembly 6. One end of the third cooling channel 7 is connected to the outside, and the other end faces the stator assembly. This arrangement allows coolant to enter the rotor assembly 6 through the third cooling channel 7. When the motor is operating, the rotor assembly 6 rotates, and the rotational inertia forces the coolant to be thrown from the third cooling channel 7 onto the stator assembly, thus cooling the stator assembly. The third cooling channel 7 includes a main cooling channel 71 arranged axially and multiple sub-cooling channels 72 arranged radially. The sub-cooling channels 72 are spaced apart circumferentially around the rotor assembly 6 and are all connected to the main cooling channel 71. In use, coolant is first delivered into the main cooling channel 71, and then delivered to the stator assembly through the sub-cooling channels 72 to cool the stator assembly. Simultaneously, the third cooling channel 7 also cools the rotor assembly 6.

[0087] In one embodiment, reference is made to Figure 13-16 The motor also includes a housing 8, which includes a main body 81, a first protrusion 82 and two second protrusions 83 disposed on the outside of the main body 81. The main body 81 is fitted over the stator assembly, and the inner wall of the main body 81 is in contact with the outer side of the stator assembly. The main body 81 is provided with a third nozzle 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 to the two second protrusions 83. The first protrusion 82 is provided with a first guide channel 85, and the second protrusion 83 is provided with a second guide channel 86. The two ends of the first guide channel 85 are respectively connected to the two second guide channels 86. The first guide channel 85 is also connected to the outer side of the stator assembly, and the second guide channel 86 is connected to the third nozzle 84. The first guide channel 85, the second guide channel 86 and the third nozzle 84 cooperate to form a fourth cooling channel.

[0088] As an example, the motor also includes a housing 8. During installation, the housing 8 is fitted over the stator assembly, with the inner wall of the housing 8 fitting against the outer side of the stator assembly. Specifically, both the stator assembly and the rotor assembly 6 are installed inside the housing 8. The outer side of the stator core of the stator assembly is fitted against the inner wall of the housing 8. 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 fitted against the stator winding 5. Specifically, the guide groove 12 of the first lamination 1 and the first nozzle 22 of the second lamination 2 cooperate to form a first cooling channel. The first cooling channel is fitted against the inner wall of the housing 8, and the coolant can flow in the first cooling channel to cool the outer part of the stator core itself, the housing 8, and the stator winding 5 located at both ends of the stator core.

[0089] In one embodiment, reference is made to Figure 14 , Figure 15 and Figure 16The housing 8 includes a main body 81, a first protrusion 82 and two second protrusions 83. The main body 81 serves as a reference and is fitted onto 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 disposed 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. The two ends of the first protrusion 82 are respectively connected to the two second protrusions 83. During installation, the main body 81 is provided with a third nozzle 84 facing the stator assembly, the first protrusion 82 is provided with a first guide channel 85, and the second protrusion 83 is provided with a second guide channel 86. The two ends of the first guide channel 85 are respectively connected to the two second guide channels 86, and the first guide channel 85 is also connected to the outside of the stator assembly. The second guide channels 86 are connected to the third nozzle 84. In this way, the first guide channel 85, the second guide channel 86 and the third nozzle 84 cooperate to form a fourth cooling channel. Coolant can flow from the first guide channel 85 to the stator assembly and the second guide channel 86 at the same time. The coolant on the stator assembly can flow in the first cooling channel on the outside of 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 nozzle 84 to further cool the stator assembly.

[0090] In one embodiment, reference is made to Figure 16 The main body 81, the first protrusion 82 and the two second protrusions 83 are integrally formed; the third nozzle 84, the first protrusion 82 and the two second protrusions 83 are all provided in the upper half of the main body 81.

[0091] As an example, the main body 81, the first protrusion 82, and the two second protrusions 83 are integrally formed. Through clever drilling and sealing, the first guide channel 85 and the second guide channel 86 are formed, avoiding the formation of oil channels in the shell 8 through welding, simplifying the processing technology and reducing welding costs. Utilizing the self-flow of the coolant and the effect of gravity, the third nozzle 84, the first protrusion 82, and the two second protrusions 83 are all located in the upper half of the main body 81, allowing the coolant to flow throughout the entire interior of the shell 8, thereby achieving uniform cooling of the internal structure of the shell 8.

[0092] In one embodiment, reference is made to Figure 14 and Figure 16 The first flow channel 85 includes a first main flow channel 851 and a first branch flow channel 852; 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; the first branch flow channel 852 is arranged and connected to the first main flow channel 851, and both ends of the first branch flow channel 852 are connected to two second flow channels 86 respectively.

[0093] As an example, the first flow channel 85 includes a first main flow channel 851 and a first branch flow channel 852. In design, 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 faces the stator assembly, allowing coolant to flow directly from the first main flow channel 851 to the stator assembly for cooling. The first branch flow channel 852 intersects and connects with the first main flow channel 851. Both ends of the first branch flow channel 852 are connected to two second flow channels 86, allowing coolant to flow from the first main flow channel 851 to the first branch flow channel 852, then from the first branch flow channel 852 into the second flow channels 86, and finally from the second flow channels 86 through the third nozzle 84 onto the stator assembly for further cooling.

[0094] In one embodiment, reference is made to Figure 15 and Figure 16 The second flow channel 86 includes a second main flow channel 861 and a second branch flow channel 862; the second main flow channel 861 is arranged circumferentially, and the second branch flow channel 862 is arranged radially; the second main flow channel 861 is connected to the first flow channel 85, and the second branch flow channel 862 is arranged intersecting and connected to the second main flow channel 861; one end of the second branch flow channel 862 is connected to the second main flow channel 861, and the other end of the second branch flow channel 862 is connected to the third nozzle 84.

[0095] As an example, the second flow channel 86 includes a second main flow channel 861 and a second branch flow channel 862. During installation, the second main flow channel 861 is arranged circumferentially to better match the shape of the second flow channel 86 with the housing 8, increasing the overlap area between the second flow channel 86 and the housing 8, thereby expanding the cooling efficiency of the coolant on the housing 8. The second branch flow channel 862 is arranged radially. The second main flow channel 861 is connected to the first flow channel 85, and the second branch flow channel 862 intersects and is connected to the second main flow channel 861. One end of the second branch flow channel 862 is connected to the second main flow channel 861, and the other end of the second branch flow channel 862 is connected to the third spray hole 84. This allows the coolant in the second main flow channel 861 to be sprayed from the second branch flow channel 862 through the third spray hole 84 onto the stator assembly, further cooling the stator assembly. One end of the second branch flow channel 862 is connected to the outside, and a plug is provided at one end of the second branch flow channel 862 to facilitate the cleaning of the coolant in the second flow channel 86. The plug can be a steel ball, a mesh plug, or a threaded plug, etc.

[0096] The motor in this embodiment includes a stator core, stator windings 5, a rotor assembly 6, and a housing 8. During installation, the stator assembly, consisting of the stator core and stator windings 5, is fitted onto the rotor assembly 6, and the housing 8 is fitted onto the stator core. Simultaneously, a first cooling channel is located on the outside of the stator core, a second cooling channel is located on the inside of the stator core, a third cooling channel 7 is located inside the rotor assembly 6, and a fourth cooling channel is located inside the housing 8. The fourth cooling channel communicates with the first cooling channel, and the first cooling channel communicates with the second cooling channel. With this configuration, coolant enters through the fourth cooling channel of the housing 8 and can flow to the first cooling channel, then to the second cooling channel, or directly to the stator windings 5. Coolant enters through the third cooling channel 7 of the rotor assembly 6 and can flow directly to the stator windings 5. The coolant flowing through the first cooling channel can contact the outer part of the stator core and the housing 8, and can also flow to the outside of the stator winding 5, thereby cooling the outer part of the stator core, the housing 8, and the outside of the stator winding 5. Then, after passing through the first unblocking groove 9 and the second unblocking groove 10, the coolant flows to the second cooling channel. 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 housing 8 and the stator winding 5, thereby cooling the outside of the housing 8 and the stator winding 5. By setting up a first cooling channel, a second cooling channel, a third cooling channel, and a fourth cooling channel, the motor can be cooled comprehensively and evenly, resulting in 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.

[0097] This utility model provides a vehicle, including an electric motor.

[0098] As an example, the vehicle includes an electric motor; the electric motor includes a rotor assembly 6 and a stator assembly. During installation, the rotor assembly 6 is installed inside 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; specifically, the stator core includes at least one first lamination 1 and two second laminations 2. The first opening slot 11 of the first lamination 1 and the second opening slot 21 of the second lamination 2 cooperate with the stator winding 5 to form a second cooling channel. 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 lamination 1 is provided with a guide groove 12, and the outer side of the second lamination 2 is provided with a first... The first spray hole 22 is positioned opposite to the guide groove 12, forming a first cooling channel. Coolant can flow within this channel to cool the outer portion of the stator core, the parts connected to the outer side of the stator core (housing 8), and the outer portions of the parts located at both ends of the stator core (stator windings 5). This arrangement allows cooling from both the inner and outer sides of the stator core, expanding the cooling area, making cooling more even, improving the cooling effect, and extending the service life of the stator core. By adjusting the coolant volume, the number and size of the opening grooves, and the number and size of the first spray holes 22, the coolant is sprayed parabolically from the stator core towards the middle of the outer end of the stator windings 5, ensuring a more even cooling effect. Compared to existing stator cores, the stator core in this example reduces the number of laminations in the middle for liquid inlet, resulting in fewer types of laminations, lower mold costs, and all slots on the laminations are open slots, further reducing cost and weight.

[0099] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A stator core, characterized in that, Includes at least one first lamination and two second laminations: At least one of the first laminations is disposed between two of the second laminations; The outer side of the first lamination is provided with an outward-facing guide groove; The second lamination has a first nozzle on its outer side; The first nozzle is positioned opposite to the guide channel, and the first nozzle and the guide channel cooperate to form a first cooling channel.

2. The stator core according to claim 1, characterized in that, The first lamination has a first opening groove with an inward opening on its inner side; the second lamination has a second opening groove with an inward opening on its inner side; the second opening groove is disposed opposite to the first opening groove, and the second opening groove and the first opening groove cooperate to form a second cooling channel.

3. The stator core according to claim 1, characterized in that, The stator core also includes a flow guide; the flow guide is installed on the side of the second lamination away from the first lamination and is arranged opposite to the first nozzle.

4. The stator core according to claim 3, characterized in that, The flow guide includes a main body block and a connecting buckle disposed on the main body block; The connecting buckle is installed on the second punch, and the main body block is attached to the second punch; The main body block is provided with a first guide hole, which is connected to the first spray hole; The first guide hole is inclined from the outside to the inside along the axial direction of the stator core.

5. The stator core according to claim 1, characterized in that, There are multiple first laminations, which are stacked and rotated in a staggered manner along the axial direction.

6. The stator core according to claim 2, characterized in that, The second lamination also includes a second nozzle, which is spaced apart from the first nozzle along the radial direction of the stator core. The stator core further includes a third lamination; the third lamination is disposed between the first lamination and the second lamination; The inner side of the third lamination is provided with a third opening groove facing inward, and the third lamination is provided with a second guide hole arranged in the radial direction of the stator core; one end of the second guide hole is arranged between two adjacent third opening grooves, and at least one third opening groove is arranged at intervals between two adjacent second guide holes. The third opening groove is disposed opposite to the first opening groove and the second opening groove; the first side of the second guide hole is disposed opposite to the guide groove, and the second side of the second guide hole is disposed opposite to the first spray hole and the second spray hole.

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

8. A stator assembly, characterized in that, Includes stator windings and the stator core as described in any one of claims 1-7; The stator windings are installed inside the stator core; The inner side of the stator core is in close contact with the stator winding.

9. An electric motor, characterized in that, Includes the rotor assembly and the stator assembly as described in claim 8; The rotor assembly is installed within the stator assembly.

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

11. The motor according to claim 9, characterized in that, The motor also includes a housing, which includes a main body, a first protrusion and two second protrusions disposed on the outside of the main body, the main body being sleeved on the stator assembly, the inner wall of the main body being in contact with the outer side of the stator assembly, and the main body being provided with a third nozzle facing the stator assembly; Two second protrusions are spaced apart along the axial direction of the main body, and the two ends of the first protrusion are respectively connected to the two second protrusions; The first protrusion is provided with a first flow channel, and the second protrusion is provided with a second flow channel; the two ends of the first flow channel are respectively connected to the two second flow channels, the first flow channel is also connected to the outside of the stator assembly, the second flow channel is connected to the third nozzle, and the first flow channel, the second flow channel and the third nozzle 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 disposed on the upper half of the main body.

13. The motor according to claim 11, characterized in that, The first flow channel includes a first main flow channel and a first branch flow channel; the first main flow channel is arranged radially, and the first branch flow channel is arranged axially; One end of the first main channel is connected to the outside, and the other end of the first main channel faces the stator assembly; The first branch channel intersects and connects with the first main channel, and both ends of the first branch channel are respectively connected to the two second guide channels.

14. The motor according to claim 11, characterized in that, The second flow channel includes a second main flow channel and a second branch flow channel; the second main flow channel is arranged circumferentially, and the second branch flow channel is arranged radially. The second main channel is connected to the first diversion channel, and the second branch channel intersects with and is connected to the second main channel; One end of the second diversion channel is connected to the second main channel, and the other end of the second diversion channel is connected to the third nozzle.

15. A vehicle, characterized in that, Includes the motor as described in any one of claims 9-14.

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