Stator core, stator assembly, motor, power assembly and vehicle

Abstract

The utility model discloses a stator core, a stator assembly, a motor, a power assembly and a vehicle. The stator core comprises a stator core body and stator tooth blocks. The stator core body is provided with stator convex teeth, and the stator convex teeth are arranged on the radial inner side of the stator core body; the stator tooth blocks are suitable for being sleeved with the stator windings, the stator tooth blocks are connected with the stator protruding teeth, and the stator tooth blocks and the stator protruding teeth are arranged in a split mode. The stator tooth blocks are connected to the protruding parts of the stator core body, namely the stator convex teeth, so that the stator core is convenient to assemble, the processing difficulty of the stator core body is reduced, the processing efficiency of the stator core body is improved, the structural strength and rigidity of the stator core body are ensured, and the production efficiency of the stator assembly is improved; due to the split arrangement of the stator tooth blocks and the stator convex teeth, the winding flexibility and convenience of the winding coil can be improved, the slot fullness rate of the winding coil is ensured, and the motor performance can be improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a stator core, stator assembly, motor, powertrain, and vehicle. Background Technology

[0002] Stator assemblies typically include a stator core and stator windings wound on the stator core. The stator core typically includes a stator core body and stator teeth. In related technologies, an assembly groove is formed on the inner side of the stator core body, and the stator teeth with stator windings wound on them cooperate with the assembly groove. The stator core body is difficult to process, and the production efficiency of stator assemblies is low. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a stator core that can improve the production efficiency of stator assemblies.

[0004] The second objective of this invention is to provide a stator assembly, including the stator core in the above embodiments, and also including stator windings.

[0005] The third objective of this invention is to provide an electric motor that includes the stator assembly described in the above embodiments.

[0006] The fourth objective of this invention is to provide a powertrain including the motor described in the above embodiments.

[0007] The fifth objective of this invention is to provide a vehicle that includes the motor and / or powertrain described in the above embodiments.

[0008] According to a first aspect of the present invention, the stator core includes a stator core body and a stator tooth block. The stator core body is provided with stator protrusions and is annular. In the radial direction of the stator core body, the stator protrusions are provided on the outer or inner side of the stator core body. The stator tooth block is adapted to fit a stator winding. The stator tooth block is connected to the stator protrusions and is separately disposed from the stator protrusions.

[0009] According to the embodiments of this utility model, the stator core is connected to the protruding part of the stator core body, namely the stator tooth, by a stator tooth block. Compared with the stator tooth block being directly connected to the stator core body, this application facilitates the assembly of the stator core, reduces the processing difficulty of the stator core body, improves the processing efficiency of the stator core body, ensures the structural strength and rigidity of the stator core body, and is more conducive to improving the production efficiency of stator assemblies. At the same time, since the stator tooth block and the stator tooth are separately set, the flexibility and convenience of winding the winding coil can be improved, the slot fill factor of the winding coil is guaranteed, and it is beneficial to improve the motor performance.

[0010] In some embodiments, the stator tooth block is disposed on the radial inner side of the stator core body, and a mating groove is formed on one of the stator tooth block and the stator tooth, and the other of the stator tooth block and the stator tooth mates with the mating groove.

[0011] In some embodiments, the mating groove is formed on the stator tooth block, and the mating groove is open on the side facing the stator core body.

[0012] In some embodiments, the mating groove extends axially along the stator core body and is open on both sides of the stator core body in the axial direction.

[0013] In some embodiments, at least one limiting rib is formed on at least one sidewall of the mating groove, and at least one limiting groove is formed on the corresponding surface of the other of the stator tooth block and the stator protrusion, the limiting rib and the limiting groove cooperating; and / or, at least one limiting groove is formed on at least one sidewall of the mating groove, and at least one limiting rib is formed on at least one side surface of the other of the stator tooth block and the stator protrusion, the limiting rib and the limiting groove cooperating.

[0014] In some embodiments, there are multiple limiting ribs, and the multiple limiting ribs are arranged at intervals.

[0015] In some embodiments, a plurality of the limiting ribs are arranged radially along the stator core body and extend axially along the stator core body; there are a plurality of limiting grooves, and the plurality of limiting ribs respectively cooperate with the plurality of limiting grooves.

[0016] In some embodiments, the mating groove is provided on the stator tooth block, and the distance between two opposite sidewalls of the mating groove along the circumferential direction of the stator core body decreases in the radial direction of the stator core body toward the center of the stator core body.

[0017] In some embodiments, the stator tooth block and the corresponding stator tooth are engaged by a connecting structure, the connecting structure including a guide portion and a limiting portion, the guide portion being used to guide the stator tooth block to approach the stator tooth along a predetermined direction and engage with the stator tooth, and the limiting portion being used to restrict the stator tooth block from disengaging from the stator tooth along a direction opposite to the predetermined direction.

[0018] In some embodiments, the stator core includes a plurality of stator teeth and a plurality of stator tooth blocks. The stator teeth are disposed on the radial inner side of the stator core body. The plurality of stator teeth and the plurality of stator tooth blocks are evenly distributed along the circumference of the stator core body. At least some of the stator tooth blocks cooperate with the corresponding stator teeth through a sawtooth structure.

[0019] In some embodiments, the serrated structure includes: at least one first tooth structure, the first tooth structure being disposed on at least one side of two sides of the stator protrusion disposed circumferentially along the stator core body, the outline of the projection of the first tooth structure onto a plane perpendicular to the axis of the stator core body including a group of line segments, the group of line segments including: a first line segment and a second line segment, the first end of the first line segment being close to the stator core body, the second end of the first line segment extending obliquely in a direction away from the stator core body and close to the center of the stator core body; the first end of the second line segment being connected to the second end of the first line segment, the second end of the second line segment extending obliquely in a direction away from the stator core body and close to the adjacent stator protrusion.

[0020] In some embodiments, the first tooth structure is disposed on both sides of the stator protrusion along the circumferential direction of the stator core body. On a projection plane perpendicular to the axis of the stator core body, the line segment groups disposed on both sides of the first tooth structure have a symmetrical axis passing through the center of the stator core body. The line segment group further includes a third line segment, which is parallel to the symmetrical axis and connected to the first end of the first line segment or the second end of the second line segment.

[0021] In some embodiments, the contour line includes multiple sets of line segments connected sequentially along the axis of symmetry, and the third line segment of the line segment set closest to the stator core body is connected to the projection of the stator core body on the projection plane.

[0022] In some embodiments, the angle between the first line segment and the first direction is between 0° and 45°; and / or, the angle between the second line segment and the first direction is between 90° and 135°; the first direction is the direction from the center of the stator core body to the stator core body along the axis of symmetry of the first tooth structure where the first line segment is located.

[0023] In some embodiments, the stator tooth block is provided with a tooth groove with an opening facing the stator core body, and the sawtooth structure further includes at least one second tooth structure, the second tooth structure being disposed on both sides of the tooth groove, and the outline shape of the second tooth structure being adapted to the outline shape of the first tooth structure.

[0024] According to a second aspect of the present invention, a stator assembly includes a stator core as described in any of the above embodiments and a stator winding, wherein the stator winding includes an insulating support and a winding coil, the insulating support being disposed on the stator tooth block; and the winding coil being wound on the insulating support.

[0025] In some embodiments, there are multiple stator teeth, each of which is connected to a stator tooth. The insulating support includes multiple sub-supports, each of which has a mounting groove. The mounting grooves are spaced apart circumferentially along the stator core body. The mounting grooves have openings on the side of the insulating support opposite to the stator core body. At least a portion of each of the multiple stator teeth passes through the openings into the multiple mounting grooves.

[0026] The motor according to a third aspect of the present invention includes the stator assembly described in any of the above embodiments.

[0027] The powertrain according to a fourth aspect of the present invention includes the motor described in the above embodiments.

[0028] The vehicle according to the fifth aspect of the present invention includes the motor or powertrain described in the above embodiments.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 This is a schematic diagram of a stator assembly according to an embodiment of the present utility model;

[0032] Figure 2 This is an exploded view of the stator assembly according to an embodiment of the present utility model;

[0033] Figure 3 This is a schematic diagram of the stator core body according to an embodiment of the present utility model;

[0034] Figure 4 This is a schematic diagram of the stator tooth block according to an embodiment of the present utility model;

[0035] Figure 5 yes Figure 4 Enlarged schematic diagram of region P in the middle;

[0036] Figure 6This is a partially exploded schematic diagram of the stator core according to an embodiment of the present utility model;

[0037] Figure 7 yes Figure 6 Enlarged schematic diagram of the mid-Q region;

[0038] Figure 8 This is a schematic diagram of the insulating bracket according to an embodiment of the present utility model;

[0039] Figure 9 This is a schematic diagram of the stator winding according to an embodiment of the present utility model;

[0040] Figure 10 This is an assembly diagram of the stator winding and stator tooth block according to an embodiment of the present utility model;

[0041] Figure 11 This is a schematic diagram of the orthographic projection of the stator core body in the embodiment of the present utility model onto a plane perpendicular to the axial direction of the stator core body.

[0042] Figure 12 According to one embodiment of the present utility model Figure 11 Enlarged schematic diagram of the R region;

[0043] Figure 13 According to another embodiment of the present invention Figure 11 Enlarged schematic diagram of the R region;

[0044] Figure 14 yes Figure 11 A magnified diagram of the S-region in the middle.

[0045] Figure label:

[0046] 1. Stator assembly;

[0047] 100. Stator core;

[0048] 10. Stator core body; 11. Stator teeth;

[0049] 20. Stator winding; 21. Stator tooth block; 22. Mating slot; 221. First sidewall; 222. Second sidewall; 223. Third sidewall; 23. Sawtooth structure; 231. First tooth structure; 232. Second tooth structure; 24. Outline; 25. Tooth groove; 26. Line segment group; 27. Third line segment; 28. First line segment; 29. ​​Second line segment;

[0050] 30. Insulating bracket; 31. Sub-bracket; 32. Limiting component; 33. Mounting slot; 34. Winding coil;

[0051] 40. Connecting structure; 41. Guide part; 42. Limiting part. Detailed Implementation

[0052] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-14 The stator core 100 according to an embodiment of the present utility model is described. The stator core 100 includes: a stator core body 10 and a stator tooth block 21.

[0053] Specifically, such as Figures 1-3 As shown, the stator core body 10 is provided with stator protrusions 11. The stator core body 10 is annular. In the radial direction of the stator core body 10, the stator protrusions 11 are provided on the outer or inner side of the stator core body 10. The stator tooth block 21 is adapted to fit the stator winding 20. The stator tooth block 21 is connected to the stator protrusions 11, and the stator tooth block 21 and the stator protrusions 11 are separately provided.

[0054] The stator core body 10 is an annular structure. The projection shape of the stator core body 10 along the axial direction on the horizontal plane is annular. The stator tooth 11 can protrude radially from the side surface of the stator core body 10 adjacent to the center of the stator core body 10 and extend toward the center of the stator core body 10. The stator tooth 11 can also protrude radially from the other side surface of the stator core body 10 away from the center of the stator core body 10 and extend in a direction away from the center of the stator core body 10. The stator tooth 11 can be fixedly connected to the stator core body 10. The stator tooth block 21 and the stator tooth 11 can be separably engaged radially with the stator core body 10.

[0055] Optionally, there are multiple stator teeth 11, which are spaced apart circumferentially along the stator core body 10, and the stator core body 10 is a permanent magnet.

[0056] According to the embodiment of the present invention, the stator core 100 is connected to the stator core body 10 via stator tooth block 21 to the protruding part along the radial direction of the stator core body 10, namely the stator tooth 11. Compared with the stator tooth block 21 being directly connected to the stator core body 10, this application is more convenient for assembling the stator core 100, reduces the processing difficulty of the stator core body 10, improves the processing efficiency of the stator core body 10, ensures the structural strength and rigidity of the stator core body 10, and is more conducive to improving the production efficiency of the stator assembly 1. At the same time, since the stator tooth block 21 and the stator tooth 11 are separately set, the flexibility and convenience of winding the winding coil 34 can be improved, the slot fill factor of the winding coil 34 is guaranteed, and it is beneficial to improve the motor performance.

[0057] According to some embodiments of the present invention, taking the stator tooth 11 arranged radially along the stator core body 10 on one side of the stator core body 10 near the center of the stator core body 10 as an example, the stator tooth block 21 is arranged radially inside the stator core body 10, and a mating groove 22 is formed on one of the stator tooth block 21 and the stator tooth 11, and the other of the stator tooth block 21 and the stator tooth 11 mates with the mating groove 22.

[0058] For example, combining Figure 4 , Figure 5 and Figure 6 The stator tooth block 21 has a mating groove 22, and the stator tooth 11 and the mating groove 22 on the stator tooth block 21 form a separable fit along the radial direction of the stator core body 10. Optionally, the stator tooth 11 has a mating groove 22, and the stator tooth block 21 and the mating groove 22 on the stator tooth 11 form a separable fit along the radial direction of the stator core body 10.

[0059] Therefore, by forming a mating groove 22 on one of the stator tooth block 21 and the stator tooth 11, and having the other of the stator tooth block 21 and the stator tooth 11 engage with the mating groove 22, the assembly and disassembly efficiency of the stator tooth block 21 and the stator tooth 11 can be further improved, as well as the accuracy of the engagement between the stator tooth block 21 and the stator tooth 11. This allows for the circumferential positioning of the stator tooth block 21 within the stator core body 10, ensuring the structural strength of the stator tooth block 21 and the stator tooth 11 after installation.

[0060] According to some embodiments of this utility model, such as Figure 5 As shown, the mating groove 22 is formed on the stator tooth block 21, and the mating groove 22 is open on the side facing the stator core body 10.

[0061] A mating groove 22 is formed at one end of the stator tooth block 21 that is radially away from the center of the stator core body 10. The shape and size of the mating groove 22 are adapted to the shape and size of the stator tooth 11. The mating groove 22 is open towards the stator tooth 11 on the side that is radially away from the center of the stator core body 10, so that the stator tooth block 21 can mate with the stator tooth 11 radially.

[0062] Therefore, by forming a mating groove 22 on the stator tooth block 21, and the mating groove 22 being open on the side facing the stator core body 10, it is convenient for the stator protrusion 11 and the stator tooth block 21 to form a separable fit through the mating groove 22, thereby improving the assembly efficiency of the stator core 100.

[0063] According to some embodiments of this utility model, such as Figure 5As shown, the mating groove 22 extends along the axial direction of the stator core body 10, and the mating groove 22 is open on both sides of the stator core body 10 in the axial direction. This facilitates the adjustment of the stator tooth 11 and the stator tooth block 21 in the axial direction of the stator core body 10 after they are mated, improving assembly efficiency and reducing assembly difficulty.

[0064] According to some embodiments of the present invention, at least one limiting rib is formed on at least one side wall of the mating groove 22, and at least one limiting groove is formed on the corresponding surface of the other of the stator tooth block 21 and stator protrusion 11, and the limiting rib and the limiting groove are mated.

[0065] Optionally, in this application, taking the mating groove 22 being provided on the stator tooth block 21 as an example, at least one limiting rib is formed on at least one side wall of the stator tooth block 21 where the mating groove 22 mates with the stator tooth 11, i.e., on the contacting side wall. At least one limiting groove is formed at the corresponding position of the side surface of the stator tooth 11 that mates with the at least one side wall, i.e., the surface that contacts the mating groove 22 of the stator tooth. The limiting rib and the limiting groove form a separable fit, and the fit direction can be along the axial direction or radial direction of the stator core body 10. This effectively improves the connection strength between the stator tooth block 21 and the stator tooth 11, resulting in a higher assembly fit between the stator tooth block 21 and the stator tooth 11, and preventing the stator tooth 11 from falling off the mating groove 22 on the stator tooth block 21.

[0066] Optionally, at least one limiting groove is formed on at least one side wall of the mating groove 22, and at least one limiting rib is formed on at least one side surface of the other of the stator tooth block 21 and stator tooth 11, the limiting rib and the limiting groove mating.

[0067] That is, at least one limiting groove is formed on at least one side wall of the stator tooth block 21 where the mating groove 22 mates with the stator tooth 11, and at least one limiting rib is formed on one side surface of the stator tooth 11 where it mates with the at least one side wall. The limiting rib and the limiting groove form a separable fit. Thus, the connection strength between the stator tooth block 21 and the stator tooth 11 can be improved by the fit of the limiting rib and the limiting groove.

[0068] Optionally, at least one limiting rib and at least one limiting groove are formed on at least one sidewall of the stator tooth block 21 where the mating groove 22 mates with the stator tooth 11, and at least one limiting groove and at least one limiting rib are formed on one side surface of the stator tooth 11 where it mates with the at least one sidewall. That is, limiting ribs and limiting grooves are provided on both the surface of the stator tooth 11 and the mating groove 22 that contacts each other and the surface of the mating groove 22 and the stator tooth 11 that contacts each other. This can further improve the connection strength between the stator tooth block 21 and the stator tooth 11, and make the stability and reliability of the connection between the stator tooth 11 and the stator tooth block 21 higher.

[0069] According to some embodiments of this utility model, there are multiple limiting ribs, which are spaced apart. In this embodiment, the multiple limiting ribs are arranged radially at intervals along the stator core body 10. Thus, by forming multiple limiting ribs on the surfaces of the stator tooth 11 and the mating groove 22 that contact each other, and on the surfaces of the mating groove 22 and the stator tooth 11 that contact each other, the connection strength between the stator tooth block 21 and the stator tooth 11 can be improved. At the same time, the multiple limiting ribs being spaced apart can avoid stress concentration when the stator tooth block 21 and the stator tooth 11 are connected.

[0070] According to some embodiments of this utility model, multiple limiting ribs are arranged radially along the stator core body 10, and the limiting ribs extend axially along the stator core body 10; there are multiple limiting grooves, and the multiple limiting ribs respectively cooperate with the multiple limiting grooves. The arrangement of multiple limiting ribs and multiple limiting grooves is such that a tooth-like structure is formed on the two circumferential surfaces of the stator protrusions 11 along the stator core body 10 or on the inner circumferential surface of the mating grooves 22 of the stator core body 10. Therefore, by arranging multiple limiting ribs radially along the stator core body 10 and extending axially along the stator core body 10, the cooperation between the multiple limiting ribs and the multiple limiting grooves can increase the contact area between the stator tooth block 21 and the stator tooth 11, increase the frictional force between the stator tooth 11 and the stator tooth block 21, and restrict the relative movement between the stator tooth block 21 and the stator tooth 11 along the radial direction of the stator core body 10, so that the stator core 100 has good resistance to torsional deformation and further improves the connection strength between the stator tooth block 21 and the stator tooth 11.

[0071] In this embodiment, as Figure 5 As shown, the mating groove 22 includes a first sidewall 221 and a second sidewall 222. The first sidewall 221 and the second sidewall 222 are spaced apart along the circumference of the stator core body 10. The stator teeth 11 form separable matings with the first sidewall 221 and the second sidewall 222 on both sides of the circumference of the stator core body 10. For example, multiple limiting ribs are formed on the adjacent surfaces of the first sidewall 221 and the second sidewall 222, and multiple limiting grooves are formed on both sides of the stator teeth 11 along the circumference of the stator core body 10, so that the stator teeth 11 and the stator tooth block 21 form a reliable mating through the multiple limiting ribs and multiple limiting grooves.

[0072] In addition, the mating groove 22 also includes a third sidewall 223, which is radially disposed at one end of the first sidewall 221 and the second sidewall 222 near the center of the stator core body 10. The third sidewall 223 is connected to the first sidewall 221 and the second sidewall 222, and the third sidewall 223, the first sidewall 221 and the second sidewall 222 define the mounting groove 33.

[0073] Optionally, the surface of the third sidewall 223 that is radially away from the first sidewall 221 and the second sidewall 222 along the stator core body 10 is an arc surface.

[0074] According to some embodiments of the present invention, the mating groove 22 is provided on the stator tooth block 21, and the distance between two opposite side walls of the mating groove 22 along the circumferential direction of the stator core body 10 decreases in the radial direction of the stator core body 10 toward the center of the stator core body 10.

[0075] In this embodiment, the distance between the two sides of the stator tooth 11 along the circumferential direction of the stator core body 10 gradually decreases along the radial direction of the stator core body 10 toward the center of the stator core body 10; that is, the distance between the first sidewall 221 and the second sidewall 222 gradually decreases along the radial direction of the stator core body 10 toward the center of the stator core body 10.

[0076] This reduces the resistance to the radial assembly of the stator teeth 11 and stator tooth blocks 21 along the stator core body 10, thereby improving the assembly efficiency of the stator core 100.

[0077] According to some embodiments of this utility model, such as Figure 12 As shown, the stator tooth block 21 and the corresponding stator tooth 11 are engaged by a connecting structure 40. The connecting structure 40 includes a guide part 41 and a limiting part 42. The guide part 41 is used to guide the stator tooth block 21 to approach the stator tooth 11 in a predetermined direction and engage with the stator tooth 11. The limiting part 42 is used to restrict the stator tooth block 21 from disengaging from the stator tooth 11 in a direction opposite to the predetermined direction.

[0078] The connecting structure 40 is disposed on one side surface of the first sidewall 221 and the second sidewall 222 of the stator tooth block 21 adjacent to each other, and on both sides of the stator protrusion 11 corresponding to the stator tooth block 21 along the circumference of the stator core body 10, that is, on the two surfaces of the stator protrusion 11 that contact the first sidewall 221 and the second sidewall 222. In this embodiment, taking the connecting structure 40 disposed on the stator protrusion 11 as an example, the guide portion 41 on the stator protrusion 11 extends radially along the stator core body 10, and the limiting portion 42 on the stator protrusion 11 extends circumferentially along the stator core body 10. In a predetermined direction, that is, the direction in which the stator protrusion 11 moves toward the stator tooth block 21, one end of the guide portion 41 adjacent to the stator tooth block 21 extends obliquely toward the central plane of the stator protrusion 11, and the central plane of the stator protrusion 11 is a plane that extends radially along the central axis of the stator core body 10. When the guide portion 41 is disposed on both sides of the stator tooth 11 along the circumference of the stator core body 10 and is disposed opposite to each other, the end of the guide portion 41 adjacent to the central axis of the stator core body 10 extends obliquely toward the side where they are located. The limiting portion 42 is disposed at the end of the guide portion 41 adjacent to the stator tooth block 21. The cross-sectional area of ​​the limiting portion 42 is larger than the cross-sectional area of ​​the end of the guide portion 41 adjacent to the stator tooth block 21, and smaller than or equal to the cross-sectional area of ​​the other end of the guide portion 41 away from the limiting portion 42.

[0079] Therefore, by setting the connection structure 40, the guide part 41 of the connection structure 40 can facilitate the stator tooth block 21 to form a guiding fit with the stator tooth 11 along the radial direction of the stator core body 10, thereby improving the assembly efficiency. The limiting part 42 of the connection structure 40 can prevent the stator tooth block 21 from disengaging from the stator tooth 11 along the radial direction of the stator core body 10 in a direction away from the stator tooth 11, thereby further improving the connection strength between the stator tooth block 21 and the stator tooth 11.

[0080] According to some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the stator core 100 includes a plurality of stator teeth 11 and a plurality of stator tooth blocks 21. The stator teeth 11 are located on the radial inner side of the stator core body 10. The plurality of stator teeth 11 and the plurality of stator tooth blocks 21 are evenly distributed along the circumference of the stator core body 10. At least some of the stator tooth blocks 21 cooperate with the corresponding stator teeth 11 through a sawtooth structure 23.

[0081] In this embodiment, the serrated structure 23 is disposed on one side surface of the first sidewall 221 and the second sidewall 222 of at least a portion of the stator tooth block 21 that are adjacent to each other, and on both sides of the stator protrusion 11 corresponding to at least a portion of the stator tooth block 21 along the circumference of the stator core body 10, that is, on the two surfaces where the stator protrusion 11 contacts the first sidewall 221 and the second sidewall 222. At least a portion of the stator tooth block 21 and the corresponding stator protrusion 11 are engaged by the serrated structure 23. In this application, the serrated structures 23 on both sides of the stator protrusion 11 corresponding to at least part of the stator tooth block 21 are arranged opposite each other along the circumference of the stator core body 10. Since the distance between the first sidewall 221 and the second sidewall 222 tends to decrease along the radial direction of the stator core body 10 toward the center of the stator core body 10, the cross-sectional area of ​​the region defined between the two serrated structures 23 opposite each other along the radial direction of the stator core body 10 and along the circumference of the stator tooth block 21 tends to decrease in the direction toward the center of the stator core body 10, so as to further reduce the resistance of the stator protrusion 11 and the stator tooth block 21 in the radial direction of the stator core body 10.

[0082] Therefore, by providing a serrated structure 23 on at least a portion of the stator tooth block 21 and the corresponding stator tooth 11, the contact area and interlocking force at the connection between the stator tooth block 21 and the stator tooth 11 can be increased, thereby improving the connection strength at the connection between the stator tooth block 21 and the stator tooth 11 and preventing the stator tooth block 21 from coming off.

[0083] According to some embodiments of this utility model, such as Figure 7 , Figure 11 and Figure 13 As shown, the sawtooth structure 23 includes: at least one first tooth structure 231, the first tooth structure 231 being disposed on at least one side of the two sides of the stator protrusion 11 disposed along the circumferential direction of the stator core body 10, the outline 24 of the projection of the first tooth structure 231 on a plane perpendicular to the axis of the stator core body 10 includes a line segment group 26, the line segment group 26 including: a first line segment 28 and a second line segment 29, the first end of the first line segment 28 being close to the stator core body 10, the second end of the first line segment 28 extending obliquely in a direction away from the stator core body 10 and close to the center of the stator core body 10; the first end of the second line segment 29 being connected to the second end of the first line segment 28, the second end of the second line segment 29 extending obliquely in a direction away from the stator core body 10 and close to the adjacent stator protrusion 11.

[0084] Specifically, one end of the first segment 28 is disposed radially adjacent to the stator core body 10, and the other end of the first segment 28 extends radially away from the stator core body 10 and obliquely towards the central region of the stator tooth 11 along the circumference of the stator core body 10; one end of the second segment 29 is disposed radially adjacent to the stator core body 10 and connected to the other end of the first segment 28, and the other end of the second segment 29 extends radially away from the stator core body 10 and obliquely towards the central region of the stator tooth 11 along the circumference of the stator core body 10.

[0085] Therefore, the design of the first tooth structure 231 facilitates the assembly of the stator tooth 11 and the stator tooth block 21. The inclined first line segment 28 can increase the guiding effect of the assembly. The structure formed by the first line segment 28 and the second line segment 29 can effectively prevent the stator tooth 11 from coming out of the stator tooth block 21 after assembly. It can increase the contact area and interlocking force at the connection between the stator tooth block 21 and the stator tooth 11, and improve the connection strength at the connection between the stator tooth block 21 and the stator tooth 11.

[0086] According to some embodiments of this utility model, such as Figure 7 and Figure 13 As shown, the first tooth structure 231 is provided on both sides of the stator protrusion 11 arranged circumferentially upward along the stator core body 10. On the projection plane perpendicular to the axis of the stator core body 10, the line segment group 26 respectively arranged on both sides of the first tooth structure 231 has a symmetrical axis passing through the center of the stator core body 10. The line segment group 26 also includes a third line segment 27, which is parallel to the symmetrical axis and connected to the first end of the first line segment 28 or the second end of the second line segment 29.

[0087] The line segment groups 26 on both sides of the first tooth structure 231 are symmetrically arranged about the axis of symmetry passing through the center of the stator core body 10. One end of the third line segment 27 extends radially away from the stator core body 10 and circumferentially away from the central area of ​​the stator tooth 11, and connects to the other end of the adjacent first line segment 28 away from the second line segment 29. The other end of the third line segment 27 is arranged radially adjacent to the stator core body 10 and connects to the other end of the adjacent second line segment 29 away from the first line segment 28.

[0088] Therefore, by setting the third line segment 27, the contact area and engagement force at the connection between the stator tooth block 21 and the stator tooth 11 can be further increased, thereby further improving the connection strength at the connection between the stator tooth block 21 and the stator tooth 11.

[0089] According to some embodiments of this utility model, such as Figure 13 As shown, the outline 24 also includes multiple sets of line segments 26, which are connected sequentially along the direction of the axis of symmetry. The third line segment 27 of the line segment group 26 that is closest to the stator core body 10 is connected to the projection of the stator core body 10 on the projection plane.

[0090] Multiple groups of line segments 26 are connected sequentially along the axis of symmetry. Along the axis of symmetry, the other end of the third line segment 27 of the group of line segments 26 that is closest to the stator core body 10 is connected to the projection of the stator core body 10 on the projection plane.

[0091] Therefore, by connecting multiple sets of line segments 26 sequentially along the axis of symmetry, the contact area and engagement force at the connection between the stator tooth block 21 and the stator tooth 11 can be further increased, thereby further improving the connection strength at the connection between the stator tooth block 21 and the stator tooth 11.

[0092] According to some embodiments of this utility model, such as Figure 13 As shown, the angle between the first line segment 28 and the first direction is between 0° and 45°. Therefore, limiting the range of the angle between the first line segment 28 and the first direction can reduce assembly resistance and provide guidance for the assembly of the stator tooth block 21 and the stator tooth 11.

[0093] Optionally, the angle between the second line segment 29 and the first direction is between 90° and 135°; wherein, the first direction is the direction from the center of the stator core body 10 to the stator core body 10 along the axis of symmetry of the first tooth structure 231 where the first line segment 28 is located. Thus, limiting the range of the angle between the second line segment 29 and the first direction can improve the engagement force at the connection between the stator tooth block 21 and the stator protrusion 11, and prevent the stator tooth block 21 from falling off the stator protrusion 11.

[0094] Optionally, the angle between the first line segment 28 and the first direction is between 0° and 45°, while the angle between the second line segment 29 and the first direction is between 90° and 135°.

[0095] According to some embodiments of this utility model, such as Figure 7 , Figure 11 and Figure 14 As shown, the stator tooth block 21 is provided with a tooth groove 25 with an opening facing the stator core body 10. The sawtooth structure 23 also includes at least one second tooth structure 232. The second tooth structure 232 is provided on both sides of the tooth groove 25. The outline shape of the second tooth structure 232 is adapted to the outline shape of the first tooth structure 231.

[0096] Specifically, the second tooth structure 232 is symmetrically arranged about the axis of symmetry passing through the center of the stator core body 10, and the shape of the outline 24 of the projection of the second tooth structure 232 on the end face of the stator core body 10 is adapted to the shape of the outline 24 of the projection of the first tooth structure 231 on the end face of the stator core body 10.

[0097] When the stator tooth 11 and the stator tooth block 21 are engaged, the first tooth structure 231 and the second tooth structure 232 are aligned radially from one end adjacent to the stator tooth block 21 to the other end away from the stator tooth block 21. This helps the first tooth structure 231 and the second tooth structure 232 to be engaged radially along the stator core body 10. After engagement, the first tooth structure 231 and the second tooth structure 232 can effectively prevent the stator tooth block 21 from falling off the stator tooth 11, ensuring the structural strength of the connection.

[0098] Therefore, by setting the second tooth structure 232, and matching the shape of the side profile of the projection of the first tooth structure 231 and the second tooth structure 232 on the end face of the stator core body 10, the fit of the first tooth structure 231 and the second tooth structure 232 is improved, which facilitates the assembly of the stator tooth block 21 and the stator protrusion 11, while preventing the stator tooth block 21 from falling out.

[0099] Optionally, the number of the first tooth structure 231 and the second tooth structure 232 are the same.

[0100] Optionally, the first tooth structure 231 may be disposed on the stator tooth block 21, and the second tooth structure 232 may be disposed on the stator convex tooth 11, without specific limitations.

[0101] According to the second aspect embodiment of the present invention, the stator assembly 1, as follows: Figure 1 , Figure 2 and Figure 9 As shown, the stator includes the stator core 100 as described in any of the above embodiments and the stator winding 20. The stator winding 20 includes an insulating support 30 and a winding coil 34. The insulating support 30 is disposed on the stator tooth block 21; the winding coil 34 is wound on the insulating support 30.

[0102] An insulating bracket 30 is fitted radially onto the stator tooth block 21 along the stator core body 10. Then, the winding coil 34 is wound on the insulating bracket 30. The insulating bracket 30 is suitable for improving the insulation performance of the stator assembly 1 and preventing current leakage and arc breakdown. The winding coil 34 is suitable for generating a magnetic field when energized to realize the transmission and conversion of circuit functions.

[0103] Therefore, by winding the winding coil 34 onto the insulating support 30, and then placing the insulating support 30 on the stator tooth block 21, and then making the stator tooth block 21 and the stator protrusion 11 form a separable engagement along the radial direction of the stator core body 10, the winding method of the winding coil 34 can be made more flexible and varied, reducing the winding difficulty of the winding coil 34 and improving the winding efficiency. At the same time, by setting the insulating support 30, the winding coil 34 can be protected from external factors such as moisture, dust, and chemicals, extending the service life of the winding coil 34 and ensuring the normal operation of the stator assembly 1. The insulating support 30 can also increase the mechanical strength of the stator assembly 1, improve the vibration resistance and impact resistance of the stator assembly 1, thereby extending the service life of the stator assembly 1.

[0104] According to some embodiments of this utility model, such as Figure 4 , Figure 8 and Figure 10 As shown, there are multiple stator teeth 21, which are arranged at intervals along the circumference of the stator core body 10; the insulating support 30 includes multiple sub-supports 31, which are respectively disposed on the multiple stator teeth 21; and multiple winding coils 34 are respectively wound on the multiple sub-supports 31.

[0105] There are multiple stator teeth 11 and stator tooth blocks 21, and the multiple stator teeth 11 and multiple stator tooth blocks 21 are all arranged at intervals along the circumference of the stator core body 10. The number of stator teeth 11 and stator tooth blocks 21 is the same. Multiple sub-supports 31 are sleeved on the multiple stator tooth blocks 21 along the radial direction of the stator core body 10, and then multiple winding coils 34 are wound on the multiple sub-supports 31 respectively.

[0106] Therefore, by placing multiple sub-supports 31 on multiple stator tooth blocks 21 respectively, the insulation between multiple stator tooth blocks 21 can be improved, avoiding short circuits caused by contact between adjacent winding coils 34, thus improving the safety and reliability of stator assembly 1. At the same time, by winding multiple winding coils 34 on multiple sub-supports 31 respectively, the slot fill factor of winding coils 34 can be improved, thereby improving the working efficiency of stator assembly 1.

[0107] In this embodiment, as Figure 8As shown, each of the multiple sub-supports 31 is provided with a limiting member 32. The limiting member 32 is located at one end of the sub-support 31 near the center of the stator core body 10 along the radial direction, and extends circumferentially along the stator core body 10. The limiting member 32 abuts against the corresponding winding coil 34. Thus, by setting the limiting member 32, the winding coil 34 can be limited, which facilitates fixing the winding coil 34 on the corresponding sub-support 31, avoids relative displacement between the winding coil 34 and the corresponding sub-support 31, and at the same time avoids interference between the winding coil 34 and other structural components, thereby improving the safety and reliability of the stator assembly 1.

[0108] Optionally, the mating groove 22 is located at least a portion of the radial portion of the stator core body 10 adjacent to the center of the stator core body 10 and abuts against the limiting member 32.

[0109] According to some embodiments of this utility model, such as Figure 8 As shown, there are multiple stator tooth blocks 21, each of which is connected to a stator tooth 11. Multiple sub-supports 31 are respectively formed with mounting grooves 33. The multiple mounting grooves 33 are arranged at intervals along the circumference of the stator core body 10. The mounting grooves 33 have openings on the side of the insulating support 30 away from the stator core body 10. At least a portion of the multiple stator tooth blocks 21 are respectively inserted through the openings into the multiple mounting grooves 33.

[0110] The mounting groove 33 has an opening on the side of the stator core body 10 away from the stator core body 10 in the radial direction. The shape and size of the multiple mounting grooves 33 are adapted to the shape and size of the multiple stator tooth blocks 21. At least a portion of the multiple stator tooth blocks 21 in the radial direction of the stator core body 10 are respectively inserted through the opening in the multiple mounting grooves 33 and form a separable fit with the multiple mounting grooves 33.

[0111] Optionally, the mounting groove 33 has openings on both sides of the stator core body 10 in the radial direction. At least a portion of the stator tooth blocks 21 in the radial direction of the stator core body 10 passes through an opening on one side adjacent to the center of the stator core body 10 and is disposed in the mounting groove 33. At least a portion of the stator teeth 11 in the radial direction of the stator core body 10 respectively engages with the stator tooth blocks 21 through an opening on the other side away from the center of the stator core body 10.

[0112] Therefore, by forming mounting grooves 33 in multiple sub-supports 31 respectively, and by having at least a portion of multiple stator tooth blocks 21 pass through openings to cooperate with multiple mounting grooves 33, the assembly efficiency of multiple stator tooth blocks 21 and multiple mounting grooves 33 can be improved, which facilitates the insulation support 30 to support the winding coil 34 and the installation of stator tooth blocks 21.

[0113] In this embodiment, the stator core body 10 includes a stator core yoke and a stator tooth 11. The stator tooth 11 is located on one side of the stator core body 10 near the center in the radial direction. After the sub-support 31 is assembled with the stator tooth block 21 and the winding coil 34, it engages with the stator tooth 11 in the radial direction and abuts against the stator core yoke.

[0114] According to some embodiments of this utility model, the stator core body 10 is a stamped part. This improves the production efficiency of the stator core body 10, reduces production costs, and simultaneously enhances the structural strength and machining accuracy of the stator core body 10.

[0115] Optionally, the stator tooth block 21 is a stamped part. This can improve the production efficiency of the stator tooth block 21, reduce the production cost of the stator tooth block 21, and at the same time improve the structural strength and machining accuracy of the stator tooth block 21.

[0116] Optionally, both the stator core body 10 and the stator tooth block 21 can be stamped parts or made by other processes, which is not limited here.

[0117] In this embodiment, by having at least a portion of the stator tooth blocks 21 pass through openings and engage with the multiple mounting slots 33, the insulating bracket 30 is fitted onto the stator tooth blocks 21. Subsequently, the winding coil 34 is wound onto the insulating bracket 30, and the limiting member 32 of the insulating bracket 30 provides a stop and support for the winding coil 34, improving the flexibility of the winding coil 34 arrangement. Then, the multiple stator tooth blocks 21 and the multiple stator protrusions 11 of the stator core body 10 are engaged with each other in the radial direction of the stator core body 10 through the sawtooth structure 23, thereby realizing the assembly of the stator assembly 1. The stator tooth blocks 21 are connected to the protruding parts of the stator core body 10, i.e., the stator protrusions 11, which facilitates the assembly of the stator core 100, improves the structural strength of the stator core body 10, and improves the production efficiency of the stator assembly 1.

[0118] The motor according to a third aspect embodiment of the present invention includes a stator assembly 1 as described in any of the first aspect embodiments above.

[0119] The powertrain according to a fourth aspect embodiment of the present invention includes the motor described in the above embodiments. In this embodiment, the powertrain includes a motor and a transmission mechanism, which are connected in a driving connection.

[0120] The vehicle according to a fifth aspect embodiment of the present invention includes the motor or powertrain described in the above embodiments. By employing the above-described motor or powertrain, the service life of the vehicle can be extended and the output power of the motor can be increased.

[0121] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0122] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0123] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0124] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator core (100), characterized in that, include: The stator core body (10) is provided with stator teeth (11), which are protruding on the outer or inner side of the stator core body (10). Stator tooth block (21), the stator tooth block (21) is adapted to wind around the stator winding (20), the stator tooth block (21) is connected to the stator tooth (11), and the stator tooth block (21) and the stator tooth (11) are separately arranged.

2. The stator core (100) according to claim 1, characterized in that, The stator tooth block (21) is located on the radial inner side of the stator core body (10). A mating groove (22) is formed on one of the stator tooth block (21) and the stator tooth (11), and the other of the stator tooth block (21) and the stator tooth (11) mates with the mating groove (22).

3. The stator core (100) according to claim 2, characterized in that, The mating groove (22) is formed on the stator tooth block (21), and the mating groove (22) is open on the side facing the stator core body (10).

4. The stator core (100) according to claim 3, characterized in that, The mating groove (22) extends along the axial direction of the stator core body (10), and the mating groove (22) is open on both sides in the axial direction of the stator core body (10).

5. The stator core (100) according to claim 2, characterized in that, At least one limiting rib is formed on at least one sidewall of the mating groove (22), and at least one limiting groove is formed on the corresponding surface of the other of the stator tooth block (21) and the stator protrusion (11), wherein the limiting rib and the limiting groove are mated; and / or, At least one limiting groove is formed on at least one side wall of the mating groove (22), and at least one limiting rib is formed on at least one side surface of the other of the stator tooth block (21) and the stator tooth (11), and the limiting rib and the limiting groove are mated.

6. The stator core (100) according to claim 5, characterized in that, There are multiple limiting ribs, and the multiple limiting ribs are arranged at intervals.

7. The stator core (100) according to claim 5, characterized in that, The plurality of limiting ribs are arranged radially along the stator core body (10), and the limiting ribs extend axially along the stator core body (10); There are multiple limiting grooves, and the multiple limiting ribs respectively cooperate with the multiple limiting grooves.

8. The stator core (100) according to claim 2, characterized in that, The mating groove (22) is provided on the stator tooth block (21). The distance between the two opposite side walls of the mating groove (22) along the circumferential direction of the stator core body (10) tends to decrease along the radial direction of the stator core body (10) toward the center of the stator core body (10).

9. The stator core (100) according to claim 1, characterized in that, The stator tooth block (21) and the corresponding stator tooth (11) are connected by a connecting structure (40). The connecting structure (40) includes a guide part (41) and a limiting part (42). The guide part (41) is used to guide the stator tooth block (21) to approach the stator tooth (11) in a predetermined direction and to engage with the stator tooth (11). The limiting part (42) is used to restrict the stator tooth block (21) from disengaging from the stator tooth (11) in a direction opposite to the predetermined direction.

10. The stator core (100) according to claim 1, characterized in that, It includes multiple stator teeth (11) and multiple stator tooth blocks (21). The stator teeth (11) are located on the radial inner side of the stator core body (10). The multiple stator teeth (11) and multiple stator tooth blocks (21) are evenly distributed along the circumference of the stator core body (10). At least some of the stator tooth blocks (21) cooperate with the corresponding stator teeth (11) through a sawtooth structure (23).

11. The stator core (100) according to claim 10, characterized in that, The serrated structure (23) includes: At least one first tooth structure (231) is provided on at least one side of the two sides of the stator protrusion (11) arranged circumferentially along the stator core body (10). The outline (24) of the projection of the first tooth structure (231) onto a plane perpendicular to the axis of the stator core body (10) includes a group of line segments (26), the group of line segments (26) including: The first line segment (28) has a first end close to the stator core body (10) and a second end extending obliquely in a direction away from the stator core body (10) and close to the center of the stator core body (10). The second line segment (29) has its first end connected to the second end of the first line segment (28), and the second end of the second line segment (29) extends obliquely in a direction away from the stator core body (10) and close to the adjacent stator tooth (11).

12. The stator core (100) according to claim 11, characterized in that, The first tooth structure (231) is provided on both sides of the stator protrusion (11) along the circumferential direction of the stator core body (10). On the projection plane perpendicular to the axis of the stator core body (10), the line segment group (26) respectively provided on both sides of the first tooth structure (231) has a symmetrical axis passing through the center of the stator core body (10). The line segment group (26) further includes a third line segment (27), which is parallel to the axis of symmetry and connected to the first end of the first line segment (28) or the second end of the second line segment (29).

13. The stator core (100) according to claim 12, characterized in that, The outline (24) includes multiple sets of line segments (26), which are connected sequentially along the axis of symmetry. The third line segment (27) of the line segment group (26) closest to the stator core body (10) is connected to the projection of the stator core body (10) on the projection plane.

14. The stator core (100) according to claim 12, characterized in that, The angle between the first line segment (28) and the first direction is between 0° and 45°; and / or, The angle between the second line segment (29) and the first direction is between 90° and 135°; The first direction is the direction from the center of the stator core body (10) to the stator core body (10) along the axis of symmetry of the first tooth structure (231) where the first line segment (28) is located.

15. The stator core (100) according to claim 11, characterized in that, The stator tooth block (21) is provided with a tooth groove (25) with an opening facing the stator core body (10). The sawtooth structure (23) also includes at least one second tooth structure (232). The second tooth structure (232) is provided on both sides of the tooth groove (25). The outline shape of the second tooth structure (232) is adapted to the outline shape of the first tooth structure (231).

16. A stator assembly (1), characterized in that, The stator core (100) includes any one of claims 1-15, and the stator winding (20), the stator winding (20) comprising: An insulating bracket (30) is sleeved on the stator tooth block (21); The winding coil (34) is wound on the insulating support (30).

17. The stator assembly (1) according to claim 16, characterized in that, There are multiple stator tooth blocks (21), and each of the multiple stator tooth blocks (21) is connected to the stator protrusion (11). The insulating support (30) includes multiple sub-supports (31), and each of the multiple sub-supports (31) forms a mounting groove (33). The multiple mounting grooves (33) are arranged at intervals along the circumference of the stator core body (10). The mounting grooves (33) form an opening on the side of the insulating support (30) away from the stator core body (10). At least a portion of the plurality of stator teeth (21) are respectively inserted through the openings into the plurality of mounting slots (33).

18. An electric motor, characterized in that, Includes the stator assembly (1) according to any one of claims 16-17.

19. A powertrain, characterized in that, Includes the motor according to claim 18.

20. A vehicle, characterized in that, Includes the motor according to claim 18, or the powertrain according to claim 19.

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