Stator core, stator assembly, suspension motor, suspension system and vehicle

Abstract

The utility model discloses a stator core, a stator assembly, a suspension motor, a suspension system and a vehicle, and the stator core comprises a stator tooth part; the stator yoke part is connected with the stator tooth part in the axial direction of the stator yoke part, at least part of the structure of the stator yoke part protrudes out of the stator tooth part to form a coil accommodating groove, and at least one of the stator tooth part and the stator yoke part forms a multi-layer structure; and the stator tooth crown is connected to the radial outer side of the stator tooth part, and at least one axial end part of the stator tooth crown protrudes out of the axial end surface of the stator tooth part in the axial direction of the stator iron core. According to the stator core provided by the utility model, at least one of the stator yoke part and the stator tooth part is of a multi-layer structure, so that eddy current loss can be greatly reduced, meanwhile, the stator tooth crown piece is arranged, so that magnetic resistance of the stator core on the outer side of the stator tooth part can be reduced, and motor thrust and operation efficiency are improved.

Description

Technical Field

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

[0002] In the related art, during the operation of the suspension motor, the stator core will generate eddy current loss and the magnetic resistance is large, thereby reducing the thrust and efficiency of the suspension motor. There is room for improvement. Summary of the invention

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a stator core that can significantly reduce the eddy current loss of the stator core, reduce the influence of the air gap on the magnetic field lines, and thus improve the thrust and efficiency of the suspension motor.

[0004] According to the stator core of the embodiment of the utility model, it includes: a stator tooth portion; a stator yoke portion, in the axial direction of the stator yoke portion, the stator yoke portion and the stator tooth portion are connected, and at least part of the structure of the stator yoke portion protrudes from the stator tooth portion to form a coil accommodating groove; a stator tooth crown, the stator tooth crown is connected to the radial outer side of the stator tooth portion, in the axial direction of the stator core, at least one axial end portion of the stator tooth crown protrudes from the axial end face of the stator tooth portion.

[0005] According to the stator core of the embodiment of the utility model, by setting at least one of the stator yoke and the stator tooth to be a multi-layer structure, the eddy current loss generated by the stator yoke and the stator tooth can be greatly reduced. At the same time, the stator tooth crown can reduce the magnetic resistance of the stator core on the outside of the stator tooth, thereby effectively improving the thrust of the motor and the overall operating efficiency of the motor.

[0006] According to the stator core of some embodiments of the present invention, the stator crown includes a plurality of second laminations, and the plurality of second laminations are stacked along the axial direction of the stator core.

[0007] According to the stator core of some embodiments of the present invention, in the circumferential direction of the stator core, the stator tooth crown includes a plurality of sub-crown portions spaced apart along the circumferential direction, and two adjacent sub-crown portions define a wire passing slot.

[0008] According to the stator core of some embodiments of the present invention, at least one of the sub-crown portions includes a plurality of second laminations, and the plurality of second laminations are stacked along the axial direction of the stator core.

[0009] According to the stator core of some embodiments of the present invention, the stator teeth include a plurality of first laminations stacked along the axial direction of the stator core, and / or

[0010] The stator yoke is a winding part.

[0011] According to the stator core of some embodiments of the present invention, the first laminations and the second laminations have the same thickness, and the number of the second laminations is greater than the number of the first laminations.

[0012] According to the stator core of some embodiments of the present invention, in the axial direction of the stator core, the height of the stator tooth crown is greater than the height of the stator tooth portion, and one side surface of the stator tooth crown is flush with one side surface of the stator tooth portion.

[0013] According to the stator core of some embodiments of the present invention, in the axial direction of the stator core, the height difference between the stator tooth crown and the stator tooth portion is a multiple of the first lamination stack.

[0014] According to the stator core of some embodiments of the utility model, the stator teeth are provided with a center hole, and the stator core further includes: a tooth yoke transition piece, and the stator teeth and the stator yoke are both connected to the tooth yoke transition piece.

[0015] According to the stator core of some embodiments of the utility model, the yoke transition piece and the stator yoke part are axially positioned and matched, and the yoke transition piece and the center hole are circumferentially positioned and matched.

[0016] According to the stator core of some embodiments of the utility model, one of the yoke transition piece and the stator tooth portion is provided with a first positioning protrusion and the other is provided with a first positioning groove, and the first positioning protrusion and the first positioning groove are plugged together to limit the circumferential position of the stator tooth portion.

[0017] According to the stator core of some embodiments of the present invention, in the circumferential direction of the stator teeth, the opposite side walls of the first positioning groove extend obliquely toward each other in the direction toward the center hole, and the first positioning protrusion and the first positioning groove are conformally matched.

[0018] According to the stator core of some embodiments of the present invention, one of the tooth yoke transition piece and the stator tooth portion is provided with a guide protrusion and the other is provided with a guide groove, and the guide protrusion is suitable for cooperating with the guide groove.

[0019] According to the stator core of some embodiments of the present invention, the outer peripheral wall of the guide protrusion is formed as an arc-shaped surface, and the guide groove is formed as an arc-shaped groove.

[0020] According to the stator core of some embodiments of the present invention, the guide groove and the first positioning protrusion are respectively arranged on the outer peripheral wall of the gear yoke transition piece, and the guide groove and the first positioning protrusion are respectively multiple and staggered along the circumferential direction of the gear yoke transition piece.

[0021] According to the stator core of some embodiments of the utility model, in the axial direction of the stator core, the end of the tooth yoke transition piece is provided with a first plug-in portion, and the end of the stator yoke is provided with a second plug-in portion, and the first plug-in portion and the second plug-in portion are plug-fitted.

[0022] According to the stator core of some embodiments of the present invention, the first plug-in portion is a plurality of first plug-in protrusions protruding axially, and the second plug-in portion is a plurality of first plug-in grooves, and the plurality of first plug-in protrusions and the plurality of first plug-in grooves are plug-fitted in a one-to-one correspondence.

[0023] According to the stator core of some embodiments of the present invention, the yoke transition piece is provided with a slit.

[0024] According to the stator core of some embodiments of the utility model, there are multiple slits, and the multiple slits are arranged at intervals in the circumferential direction of the gear yoke transition piece.

[0025] The utility model also provides a stator assembly.

[0026] The stator assembly according to the embodiment of the utility model includes: a stator core, which is the stator core described in any one of the above embodiments; and a stator winding, which is placed on the stator teeth and is sheathed on the stator yoke.

[0027] The utility model also provides a suspension motor.

[0028] The suspension motor according to the embodiment of the utility model comprises: a stator assembly, wherein the stator assembly is the stator assembly described in any one of the above embodiments; and a mover assembly, wherein the mover assembly is movably matched with the stator assembly.

[0029] The utility model also proposes a suspension system, comprising the suspension motor described in any one of the above embodiments, wherein one of the stator assembly and the mover assembly is suitable for connection to a vehicle body, and the other of the stator assembly and the mover assembly is suitable for connection to a wheel.

[0030] The utility model also provides a vehicle, comprising the suspension system described in any one of the above embodiments.

[0031] The advantages of the vehicle, the suspension system, the suspension motor and the stator assembly are the same as those of the above-mentioned stator core compared with the prior art, which will not be described in detail here.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 is a schematic structural diagram of a stator core according to some embodiments of the utility model;

[0035] Figure 2 is a schematic structural diagram of a stator core according to some embodiments of the utility model (from another side perspective);

[0036] Figure 3 is a schematic diagram of the structure of a gear yoke transition piece according to some embodiments of the utility model;

[0037] Figure 4 is a schematic structural diagram of a gear yoke transition piece according to some embodiments of the utility model (from another side perspective);

[0038] Figure 5 is a side end view of a yoke transition piece according to other embodiments of the utility model;

[0039] Figure 6 It is a schematic diagram of the structure of the gear yoke transition piece according to other embodiments of the utility model;

[0040] Figure 7 is a schematic structural diagram of a stator tooth portion according to some embodiments of the utility model;

[0041] Figure 8 is a schematic structural diagram of a stator yoke according to some embodiments of the utility model;

[0042] Fig. 9 yes Figure 8 The enlarged view of point A in the middle;

[0043] Fig.10 is a schematic structural diagram of a stator yoke according to some embodiments of the utility model (from another side perspective);

[0044] Fig.11 It is a schematic structural diagram of a stator crown according to some embodiments of the utility model;

[0045] Fig.12 It is a schematic structural diagram of a stator core according to other embodiments of the utility model;

[0046] Fig.13 It is a schematic structural diagram of a stator crown according to other embodiments of the utility model;

[0047] Fig.14 is a schematic structural diagram of a stator core according to some other embodiments of the utility model;

[0048] Fig.15 is a schematic structural diagram of a stator core according to some other embodiments of the utility model (from another side perspective);

[0049] Fig.16 is a schematic structural diagram of a gear yoke transition piece according to some other embodiments of the utility model;

[0050] Fig.17 It is a relationship diagram between the magnetic resistance and time of the stator core in the prior art and the utility model;

[0051] Fig.18 It is a graph showing the relationship between thrust and time of the suspension motor in the prior art and the present utility model;

[0052] Fig.19 It is a simulation diagram of magnetic lines of force corresponding to two stator tooth crowns of the utility model in the prior art;

[0053] Fig. 20 It is a simulation diagram of magnetic lines of force of the stator core of the utility model (the stator crown is an integrated type);

[0054] Fig.21 It is a simulation diagram of magnetic lines of force of the stator core of the utility model (the stator tooth crown is a split type).

[0055] Reference numerals:

[0056] Stator assembly 1000,

[0057] Stator core 100,

[0058] Stator tooth portion 1, center hole 11, first positioning groove 12, guide protrusion 13, second positioning groove 14, first lamination 15, tooth yoke transition piece 2, first positioning protrusion 21, guide groove 22, first plug-in protrusion 23, slit 24, positioning portion 25, stator yoke portion 3, first plug-in groove 31, head end 32, tail end 33, stator tooth crown 4, sub-crown portion 41, wire groove 42, bending portion 43, axial end face 44, circumferential side wall 45, second lamination 46;

[0059] Stator winding 200 . DETAILED DESCRIPTION

[0060] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0061] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0062] Reference below Figure 1-Figure 16 The stator core 100 according to the embodiment of the utility model is described. The stator core 100 can be applied to the stator assembly of the suspension motor, which can effectively reduce the eddy current loss, thereby facilitating the improvement of the thrust and efficiency of the suspension motor, the improvement of the operating performance of the suspension motor, and the reduction of the use cost of the suspension motor.

[0063] like Figure 1 , Figure 2 , Fig.14 and Fig.15 As shown, the stator core 100 according to the embodiment of the utility model includes: a stator tooth portion 1, a stator yoke portion 3 and a stator tooth crown 4.

[0064] In the axial direction of the stator yoke 3, the stator yoke 3 is connected to the stator tooth 1, wherein the connection method of the stator yoke 3 and the stator tooth 1 includes but is not limited to welding, plugging or clamping, or the two are indirectly connected through other structural parts. And, when the stator yoke 3 and the stator tooth 1 are connected, the axis of the stator yoke 3 and the axis of the stator tooth 1 can be overlapped.

[0065] Among them, at least one of the stator yoke 3 and the stator tooth 1 is configured as a multi-layer structure, that is, the stator yoke 3 can be constructed as a multi-layer structure, the stator tooth 1 can be constructed as a multi-layer structure, or both can be constructed as a multi-layer structure, wherein the multi-layer structure can be installed and arranged by stacking or winding, thereby, compared with the integral result component, the multi-layer stator yoke 3 and the stator tooth 1 effectively block the eddy current circuit, thereby helping to reduce the eddy current loss of the stator yoke 3.

[0066] Among them, at least part of the structure of the stator yoke 3 protrudes from the stator tooth 1 to form a coil accommodating groove, that is, after the stator yoke 3 and the stator tooth 1 are connected and fixed, the coil accommodating groove is formed, and the coil of the stator winding 200 can be arranged in the coil accommodating groove, and the stator tooth crown 4 is connected to the radial outer side of the stator tooth 1. In the axial direction of the stator core 100, at least one axial end of the stator tooth crown 4 protrudes from the axial end face of the stator tooth 1.

[0067] Among them, the stator tooth crown 4 can be constructed as an annular part, and the annular part can be constructed as a closed ring or an open ring, so that the stator tooth crown 4 can be sleeved outside the stator tooth part 1, thereby shielding the outer side of the stator tooth part 1, that is, the stator tooth part 1 is accommodated in the stator tooth crown 4.

[0068] The stator crown 4 may be a structural member made of magnetic conductive material DT4, No. 10 steel, etc., or may be made of other types of magnetic conductive materials.

[0069] In the axial direction of the stator core 100, at least one axial end of the stator tooth crown 4 protrudes from the axial end face 44 of the stator tooth portion 1. It should be noted that when the stator core 100 is installed in the stator assembly, multiple stator cores 100 can be stacked in sequence along the axial direction, and a stator slot for placing the winding is formed between two adjacent stator tooth portions 1. By arranging the stator tooth crown 4 on the outer side of the stator tooth portion 1, the stator slot can be partially blocked by the part of the stator tooth crown 4 that protrudes axially from the stator tooth portion 1, thereby optimizing the stator slot, thereby reducing the magnetic resistance of the stator core 100, thereby reducing the thrust fluctuation of the motor and ensuring the operating efficiency of the motor.

[0070] In actual design, one end of the stator tooth crown 4 may protrude from the end face of the stator tooth portion 1, or both ends of the stator tooth crown 4 may be configured to protrude from the end faces of both sides of the stator tooth portion 1, so as to increase the optimization effect on the stator slot. Figure 2 As shown, the stator tooth crown 4 is protrudingly arranged on the upper end surface of the stator tooth portion 1 to reduce the magnetic resistance on the upper side of the stator tooth portion 1, and the arrangement method is flexible and optional.

[0071] Among them, the stator yoke 3 is located at one end of the stator tooth portion 1, and the part of the stator tooth crown 4 protruding from the stator tooth portion 1 can be located at the same end of the stator tooth portion 1 as the stator yoke 3, so that after the stator winding 200 is wound on the stator yoke 3, the stator tooth crown 4 is located on the outside of the stator winding 200 to reduce the magnetic resistance.

[0072] According to the stator core 100 of the embodiment of the utility model, at least one of the stator yoke 3 and the stator tooth 1 is set to a multi-layer structure, which can greatly reduce the eddy current loss generated by the stator yoke 3 and the stator tooth 1. At the same time, the stator tooth crown 4 is set on the outer side of the stator tooth 1 to play a magnetic conductive role, which is beneficial to reduce the electromagnetic resistance outside the coil accommodating slot, thereby effectively improving the motor thrust and the overall operating efficiency of the motor.

[0073] In some embodiments, Fig.12 and Fig.13As shown, the stator crown 4 includes a plurality of second laminations 46, and the plurality of second laminations 46 are stacked along the axial direction of the stator core 100, that is, the stator crown 4 is formed by stacking a plurality of second laminations 46 along the axial direction. In this way, the stator crown 4 can be divided into a plurality of second laminations 46 for separate processing, which is beneficial to reducing the processing difficulty of the stator crown 4 and reducing the setting cost.

[0074] Among them, the thicknesses of multiple second laminations 46 can be set to be the same, or the thicknesses of at least two second laminations 46 can be set to be different, and two adjacent second laminations 46 can be connected by bonding or other methods, so that the stator crown 4 is constructed as a stable whole, and the two adjacent second laminations 46 will not be separated from each other, and the stator crown 4 is formed in the direction of the axial lamination, which is also conducive to reducing the eddy current loss of the stator crown 4 and improving the motor performance.

[0075] In actual design, the thickness of the second laminations 46 can be set to be the same as that of the first laminations 15 , and the number of the second laminations 46 is a multiple of the number of the first laminations 15 , so that the stacked second laminations 46 can protrude from the stator teeth 1 .

[0076] In some embodiments, in the circumferential direction of the stator core 100, the stator tooth crown 4 includes a plurality of sub-crown portions 41 arranged at intervals along the circumferential direction, that is, the stator tooth crown 4 can be formed by a plurality of sub-crown portions 41 to reduce the difficulty of processing the stator tooth crown 4, and the plurality of sub-crown portions 41 can be respectively connected to the outer peripheral wall of the stator tooth portion 1 to reduce the difficulty of installing the stator tooth crown 4.

[0077] Among them, two adjacent sub-tube parts 41 define a wire groove 42, that is, the wire groove 42 of the stator tooth crown 4 is defined by the adjacent sub-crown parts 41, so that the stator winding 200 located in the stator slot can extend out from or extend into the wire groove 42, which is convenient for threading the stator winding 200 and facilitating the installation and matching of the stator winding 200 and the stator core 100.

[0078] Specifically, the sub-crown 41 can be provided in three parts, such as Figure 1 , Figure 2 , Fig.12 and Fig.13 As shown, the three sub-crowns 41 are evenly spaced and distributed in the circumferential direction of the stator tooth 1, so that the outer peripheral wall of the stator tooth 1 is formed with three wire passing slots 42. It can be understood that the stator core 100 in the utility model can be applied to a three-phase permanent magnet synchronous suspension motor, and the three-phase wiring can be respectively passed through the three wire passing slots 42, which is convenient for the installation of the motor.

[0079] Therefore, by providing the stator crown 4, not only the stator slot is optimized and the magnetic resistance of the stator core 100 is reduced, but also the wire slot 42 is limited to facilitate the threading of the stator winding 200, which has a simple structure and is easy to use.

[0080] In some embodiments, at least one sub-crown portion 42 includes a plurality of second laminations 46, and the plurality of second laminations 46 are stacked along the axial direction of the stator core. In other words, one sub-crown portion 42 can be configured to include a plurality of second laminations 46, or two or three to multiple sub-crown portions 42 can be configured to include a plurality of second laminations 46. The structure is simple and the installation is convenient.

[0081] In some embodiments, the stator tooth portion 1 includes a plurality of first laminations 15 stacked, such as stacking the plurality of first laminations 15 along the axial direction of the stator core 100, and a center hole 11 is provided in the middle of the stator tooth portion 1. That is, the stator tooth portion 1 includes a plurality of first laminations 15, and the plurality of first laminations 15 are stacked along the axial direction of the stator core 100 to form an integral part, and the thickness of the plurality of first laminations 15 can be set to be the same, or the thickness of at least two of them is different, and the two adjacent first laminations 15 can be connected by bonding or other means, so that the stator tooth portion 1 is constructed as a stable integral part, and the two adjacent first laminations 15 will not separate from each other. Therefore, the stator tooth portion 1 is formed by axial lamination, which is conducive to reducing the eddy current loss of the stator tooth portion 1. In addition, the process of lamination stamping is relatively mature, which makes the manufacturing process of the stator tooth portion 1 more feasible.

[0082] Each of the first laminations 15 may be configured as an annular sheet, so that after a plurality of first laminations 15 are axially stacked, they are configured as an annular member having a central hole 11 in the middle.

[0083] In some embodiments, the first laminations 15 and the second laminations 46 have the same thickness, which facilitates the molding of the first laminations 15 and the second laminations 46 and reduces processing costs. The number of second laminations 46 is greater than the number of first laminations 15, so that after multiple second laminations 46 are stacked, they protrude from the stator teeth 1, play a magnetic conductive role, and reduce magnetic resistance.

[0084] In some embodiments, in the axial direction of the stator core 100 , the height of the stator crown 4 is greater than the height of the stator tooth 1 , and one side surface of the stator crown 4 is flush with one side surface of the stator tooth 1 .

[0085] like Figure 1 As shown, the gear yoke transition piece 2 is Figure 1 The upper surface is flush with the upper surface of the stator yoke 3. Figure 2 As shown, the gear yoke transition piece 2 is Figure 1 The middle upper surface is located between the stator tooth portion 1 and the stator yoke portion 3, so that the portion of the stator tooth crown 4 that is higher than the stator tooth portion 1 can play a magnetic conductive role, so as to reduce the magnetic resistance.

[0086] In some embodiments, in the axial direction of the stator core 100 , the height difference between the stator tooth crown 4 and the stator tooth 1 is a multiple of the first lamination stack 15 .

[0087] And in actual design, the thickness of the second laminations 46 can be set to be the same as the thickness of the first laminations 15, and the number of the second laminations 46 is a multiple of the number of the first laminations 15, so that the stacked second laminations 46 can protrude from the stator tooth portion 1, thereby reducing the difficulty of forming the stator tooth crown 4, and a larger number of second laminations 46 can be stacked to form.

[0088] In some embodiments, the stator tooth portion 1 is provided with a center hole 11, and the stator core 100 further includes: a tooth yoke transition piece 2, and the stator tooth portion 1 and the stator yoke portion 3 are both connected to the tooth yoke transition piece 2. In other words, the stator yoke portion 3 and the stator tooth portion 1 can be relatively fixed by the tooth yoke transition piece 2, so that the tooth yoke transition piece 2 eliminates the air gap between the stator yoke portion 3 and the stator tooth portion 1 of the multi-layer structure, or can also eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3 of the multi-layer structure, or can simultaneously eliminate the air gap between the stator yoke portion 3 and the stator tooth portion 1 of the multi-layer structure.

[0089] Therefore, the tooth yoke transition piece 2 is provided, which can not only realize the connection between the stator yoke 3 and the stator tooth portion 1, but also eliminate the air gap between the stator yoke 3 and the stator tooth portion 1, and reduce the influence of the air gap at the connection between the stator tooth portion 1 and the stator yoke 3 on the magnetic field lines, thereby greatly reducing the influence of the air gap formed in the motor on the magnetic field lines, which is beneficial to improving the motor thrust and increasing the motor operating efficiency.

[0090] In some embodiments, the gear yoke transition piece 2 and the stator yoke 3 are axially positioned and matched, that is, a positioning structure is designed between the connecting structure and the stator yoke 3 to fix the two relatively axially, so that the stator yoke 3 will not detach axially from the gear yoke transition piece 2.

[0091] Therefore, after the two are axially positioned, the tooth yoke transition piece 2 is located at one axial end of the stator yoke 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator yoke 3 and the stator tooth 1. During the use of the suspension motor, the tooth yoke transition piece 2 will not automatically detach from the stator yoke 3 in the axial direction, ensuring the stability of the assembly of the two, thereby reliably reducing the influence of the air gap formed in the stator yoke 3 on the magnetic field lines.

[0092] In addition, the yoke transition piece 2 and the center hole 11 are circumferentially positioned and matched, that is, the yoke transition piece 2 can be circumferentially positioned with the stator tooth portion 1 in the center hole 11 through a positioning structure, so that the stator tooth portion 1 and the yoke transition piece 2 are relatively fixed in the circumferential direction, avoiding relative movement of the two along the circumferential direction, thereby ensuring the stability of the suspension motor.

[0093] In some embodiments, the stator yoke 3 is formed as a winding part, that is, the stator yoke 3 is a multi-layer part formed by winding in sequence along the circumferential direction, and specifically, it can be a whole piece of silicon steel sheet spirally wound around the axis, that is, Fig. 9 As shown, one end of the stator yoke 3 is located inside and the other end is located outside. The stator yoke 3 can be formed by stamping and winding, and the winding head end 32 and tail end 33 can be fixed by resistance welding or other methods. Therefore, the stator yoke 3 formed by circumferential winding effectively blocks the eddy current circuit compared to a structure of a whole conductor, thereby helping to reduce the eddy current loss of the stator yoke 3. In addition, the process of winding the magnetic core of the axial flux motor is relatively mature, making the manufacturing process of the stator yoke 3 more feasible.

[0094] Therefore, the alpha coil winding can be nested in the stator yoke 3 and placed on the stator tooth 1. When the motor is running, the magnetic flux mainly passes through the iron core along the radial direction of the stator tooth 1 and the axial direction of the stator yoke 3. Therefore, the stator tooth 1 of the axially stacked rail sheets can better block the tooth eddy current circuit to reduce the eddy current loss of the stator tooth 1. At the same time, the stator yoke 3 of the circumferentially wound rail sheets can also effectively block the eddy current circuit of the stator yoke 3 to reduce the eddy current loss of the stator yoke 3. The combination of the two can further increase the motor thrust and the total motor loss, which is beneficial to improving the motor operation efficiency.

[0095] In some embodiments, one of the yoke transition piece 2 and the stator tooth portion 1 is provided with a first positioning protrusion 21 and the other is provided with a first positioning groove 12 , and the first positioning protrusion 21 and the first positioning groove 12 are plug-fitted to limit the circumferential position of the stator tooth portion 1 .

[0096] The first positioning protrusion 21 and the first positioning groove 12 are plugged together to limit the circumferential position of the stator tooth portion 1. That is, one of the yoke transition piece 2 and the stator tooth portion 1 is provided with the first positioning protrusion 21 and the other is provided with the first positioning groove 12, and the first positioning protrusion 21 and the first positioning groove 12 are plugged together to limit the circumferential position of the stator tooth portion 1, so that the yoke transition piece 2 and the stator tooth portion 1 are relatively fixed in the circumferential direction.

[0097] The first positioning protrusion 21 can be provided on the yoke transition piece 2, and the first positioning groove 12 can be provided on the stator tooth portion 1, or the first positioning protrusion 21 can be provided on the stator tooth portion 1, and the first positioning groove 12 can be provided on the yoke transition piece 2, both of which can achieve positioning and plugging of the two. Specifically, Figure 3 and Figure 4 As shown, a first positioning protrusion 21 is provided on the outer peripheral wall of the gear yoke transition piece 2, and as shown in Figure 7 As shown, a first positioning groove 12 is provided on the inner peripheral wall of the stator tooth portion 1, so that the first positioning protrusion 21 of the yoke transition piece 2 is inserted into the first positioning groove 12 of the stator tooth portion 1 for circumferential limiting fit.

[0098] Furthermore, the first positioning protrusion 21 and the first positioning groove 12 can be provided in plurality, and the plurality of first positioning protrusions 21 and the plurality of first positioning grooves 12 are matched one by one, so that the stator tooth portion 1 and the tooth yoke transition piece 2 are circumferentially limited at multiple positions, thereby improving the reliability of the limit. Figure 3 and Figure 4 As shown, the first positioning protrusions 21 are set to three, and the three first positioning protrusions 21 are spaced apart and distributed in the circumferential direction of the gear yoke transition piece 2. Figure 7 As shown, there are three first positioning grooves 12, and the three first positioning grooves 12 are spaced apart and distributed in the circumferential direction of the stator tooth portion 1. Figure 1 and Figure 2 As shown, the three first positioning protrusions 21 and the three first positioning grooves 12 are spaced apart in the circumferential direction of the stator core 100 to form three groups of positioning structures, which greatly increases the matching stability between the stator tooth portion 1 and the tooth yoke transition piece 2.

[0099] In some embodiments, Figure 7 As shown, on the circumference of the stator tooth portion 1, the relative side walls of the first positioning groove 12 extend obliquely toward each other in the direction toward the center hole 11, that is, the first positioning groove 12 includes two inner side walls relatively distributed on the circumference of the stator tooth portion 1, and the two inner side walls are inclined side walls, that is, the spacing between the two inner side walls in the circumferential direction gradually decreases from the outside to the inside along the radial direction of the stator tooth portion 1. In other words, the first positioning groove 12 can be constructed as a dovetail groove that gradually decreases from the outside to the inside in the radial direction of the stator tooth portion 1.

[0100] The first positioning protrusion 21 and the first positioning groove 12 are matched with each other. Figure 3 and Figure 4 As shown, the shape of the first positioning protrusion 21 and the first positioning groove 12 can be constructed to be the same, that is, the first positioning protrusion 21 can also be constructed as a dovetail-shaped protrusion. In this way, after the first positioning protrusion 21 is extended into the first positioning groove 12, the two can not only realize the circumferential limitation between the stator tooth portion 1 and the tooth yoke transition piece 2, but also utilize the inclined outer wall of the first positioning protrusion 21 and the inclined inner wall of the first positioning groove 12 to perform wedging limitation, so that the stator tooth portion 1 and the tooth yoke transition piece 2 can also be radially absorbed by the cooperation of the first positioning protrusion 21 and the first positioning groove 12, which has an effective radial anti-slip effect.

[0101] It should be noted that, before stacking the plurality of first laminations 15 into the stator tooth portion 1, each first lamination 15 is constructed to have a groove portion, and after the plurality of first laminations 15 are stacked, the groove portions of the plurality of first laminations 15 are axially opposite to each other along the stator tooth portion 1 to jointly construct a first positioning groove 12.

[0102] In some embodiments, the first positioning protrusion 21 is provided on the outer peripheral wall of the yoke transition piece 2, the first positioning groove 12 is located in the stator tooth portion 1, and the inner wall of the stator tooth portion 1 is recessed outward, and the first positioning groove 12 is connected to the center hole 11 of the stator tooth portion 1, that is, in actual construction, the first positioning protrusion 21 can be directly formed on the outer peripheral wall of the yoke transition piece 2 when the yoke transition piece 2 is processed. At the same time, when the center hole 11 of the stator tooth portion 1 is processed, the first positioning groove 12 and the center hole 11 can be formed together, thereby helping to reduce the setting cost.

[0103] Therefore, when the yoke transition piece 2 is installed in the center hole 11, the first positioning protrusion 21 extends from the outer peripheral wall of the yoke transition piece 2 to the first positioning groove 12 to achieve limiting cooperation with the stator tooth portion 1, with a simple structure and easy installation.

[0104] like Figure 3 and Figure 4 As shown, the first positioning protrusion 21 is provided on the outer peripheral wall of the gear yoke transition piece 2, and the thickness of the first positioning protrusion 21 can be set to be the same as the axial thickness of the gear yoke transition piece 2, which is conducive to the integral molding of the two. Figure 7 As shown, the first positioning groove 12 is provided on the inner peripheral wall of the stator tooth portion 1 , and the first positioning groove 12 can be arranged to penetrate along the axial direction of the stator tooth portion 1 , which is beneficial to jointly mold the first positioning groove 12 and the center hole 11 .

[0105] In some embodiments, one of the yoke transition piece 2 and the stator tooth portion 1 is provided with a guide protrusion 13 and the other is provided with a guide groove 22, the guide protrusion 13 extends along the axial direction of the stator core 100, and the guide protrusion 13 is suitable for movably cooperating with the guide groove 22 to guide the assembly direction of the yoke transition piece 2.

[0106] In other words, by providing the guide protrusion 13 and the guide groove 22 , the axial installation guidance of the yoke transition piece 2 and the stator tooth portion 1 can be achieved, which is beneficial to improving the installation efficiency of the two.

[0107] In actual design, the guide protrusion 13 can be provided on the yoke transition piece 2, and the guide groove 22 can be provided on the stator tooth portion 1, or Figure 7 As shown in FIG. 1 , the guide protrusion 13 is arranged on the stator tooth portion 1. Figure 3-Figure 6 As shown, the guide groove 22 is arranged on the gear yoke transition piece 2, and the arrangement method is flexible and optional.

[0108] Therefore, by setting the guide protrusion 13 and the guide groove 22 for plug-in cooperation, the tooth yoke transition piece 2 can be plug-in assembled with the stator tooth portion 1 along the axial direction, that is, during actual installation, the tooth yoke transition piece 2 is located at one axial end of the stator tooth portion 1 and is opposite to the center hole 11. At the same time, the guide protrusion 13 and the guide groove 22 are opposite to each other along the axial direction of the stator tooth portion 1, and the first positioning groove 12 and the first positioning protrusion 21 are also opposite to each other along the axial direction of the stator tooth portion 1. Then, the tooth yoke transition piece 2 is pushed into the center hole 11. Under the guiding action of the guide protrusion 13 and the guide groove 22, quick installation is achieved, which is beneficial to improving the axial installation efficiency.

[0109] In some embodiments, the outer peripheral wall of the guide protrusion 13 is formed as an arc surface, the guide groove 22 is formed as an arc groove, and the curvature of the arc surface and the curvature of the arc groove are set to be the same, so that the guide protrusion 13 can be smoothly guided and matched with the guide groove 22.

[0110] The axis of the arc surface and the axis of the arc groove are parallel to the axis of the stator core 100, so that the guide protrusion 13 and the guide groove 22 can cooperate along the axial guidance to avoid the guide jam.

[0111] Of course, in actual construction, the outer peripheral wall of the guide protrusion 13 can be constructed as an arc surface, but is not limited to an arc surface, and can also be constructed as other types of surfaces, such as a multi-section bent prismatic surface, etc., and the setting method is flexible and optional.

[0112] In some embodiments, the guide groove 22 and the first positioning protrusion 21 are respectively disposed on the outer peripheral wall of the gear yoke transition piece 2 , and the guide groove 22 and the first positioning protrusion 21 are respectively multiple and staggered along the circumference of the gear yoke transition piece 2 .

[0113] The guide groove 22 is provided on the outer peripheral wall of the yoke transition piece 2, and the guide protrusion 13 is located on the stator tooth portion 1 and protrudes inward from the inner wall of the stator tooth portion 1. Figure 3-Figure 4 As shown, the guide groove 22 and the first positioning protrusion 21 are respectively arranged on the outer peripheral wall of the yoke transition piece 2, that is, in actual construction, the guide groove 22 and the first positioning protrusion 21 can be simultaneously arranged on the outer peripheral wall of the yoke transition piece 2, and the guide groove 22 and the first positioning protrusion 21 can be distributed and spaced apart in the circumferential direction of the yoke transition piece 2. Therefore, when the yoke transition piece 2 is installed in the center hole 11, it can be assembled simultaneously with the guide protrusion 13 and the first positioning groove 12 of the stator tooth portion 1, that is, there is no need to assemble the guiding structure and the positioning structure separately, and positioning cooperation is achieved in the guiding process, which is beneficial to improve the installation efficiency and ensure the installation accuracy.

[0114] There are multiple guide grooves 22 and multiple first positioning protrusions 21, and the multiple first positioning protrusions 21 and multiple guide grooves 22 are staggered along the circumference of the yoke transition piece 2 to achieve staggered distribution of guiding and positioning cooperation with the stator tooth portion 1 in the circumferential direction of the yoke transition piece 2, so that the guiding and positioning of the stator tooth portion 1 and the yoke transition piece 2 are more balanced.

[0115] Specifically, Figure 3 and Figure 4 As shown, there are three guide grooves 22 and three first positioning protrusions 21. The three first positioning protrusions 21 and the three guide grooves 22 are spaced apart and staggered along the circumferential direction on the outer peripheral wall of the gear yoke transition piece 2. Of course, the number of guide grooves 22 and first positioning protrusions 21 includes but is not limited to three, and can be flexibly arranged according to actual guiding and positioning requirements.

[0116] In some embodiments, the tooth yoke transition piece 2 is located on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3. As a result, the tooth yoke transition piece 2 can play a magnetic conductive role on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3, thereby helping to reduce the magnetic resistance between the stator yoke portion 3 and the stator tooth portion 1, thereby improving the motor thrust and increasing the motor operating efficiency.

[0117] In some embodiments, the stator tooth portion 1 is a multi-layer structure, and the radial projections of the yoke transition piece 2 and the stator tooth portion 1 at least partially overlap, that is, at least part of the yoke transition piece 2 is located in the radial direction of the stator tooth portion 1. The yoke transition piece 2 can be installed in the stator tooth portion 1 so that the yoke transition piece 2 can eliminate the air gap between the multi-layer structure of the stator tooth portion 1 and the stator yoke portion 3, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0118] And / or, the stator yoke 3 is a multi-layer structure, and the axial projections of the tooth yoke transition piece 2 and the stator yoke 3 at least partially overlap, that is, at least part of the tooth yoke transition piece 2 is located in the axial direction of the stator yoke 3. For example, the tooth yoke transition piece 2 and the stator yoke 3 can be axially arranged opposite each other so that the tooth yoke transition piece 2 can eliminate the air gap between the multi-layer stator yoke 3 and the stator tooth portion 1, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0119] In some embodiments, the yoke transition piece 2 is connected to the radial inner side of the stator tooth portion 1, wherein a center hole 11 may be formed in the stator tooth portion 1, and the yoke transition piece 2 may be disposed in the center hole 11 to eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3 on the radial inner side of the stator tooth portion 1, thereby reducing the magnetic resistance of the stator tooth portion 1 and improving the operating efficiency of the motor.

[0120] In some embodiments, the axial extension dimension of the yoke transition piece 2 is greater than or equal to the axial extension dimension of the stator tooth portion 1. In other words, the yoke transition piece 2 and the stator tooth portion 1 can both be constructed as annular pieces, and the yoke transition piece 2 is located inside the stator tooth portion 1 and the two can be coaxially arranged, so that the yoke transition piece 2 can reduce the effect of the air gap on the magnetic resistance.

[0121] In some embodiments, a side surface of the yoke transition piece 2 away from the stator yoke 3 is flush with a side surface of the stator tooth portion. In the axial direction, a side surface of the yoke transition piece 2 close to the stator yoke 3 is located between the stator tooth portion 1 and the stator yoke 3.

[0122] like Figure 1 As shown, the gear yoke transition piece 2 is Figure 1 The upper surface is flush with the upper surface of the stator yoke 3. Figure 2 As shown, the gear yoke transition piece 2 is Figure 1 The middle upper surface is located between the stator tooth portion 1 and the stator yoke portion 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3, thereby reducing the magnetic resistance generated by the air gap and the space between the two.

[0123] In some embodiments, the tooth yoke transition piece 2 is a magnetic conductive material piece, so that the tooth yoke transition piece 2 can guide the magnetic field lines, reduce the influence of the air gap between the stator tooth portion 1 and the stator yoke portion 3 on the magnetic field lines, and reduce the magnetic resistance. The stator yoke portion 3 and the stator tooth portion 1 can be connected through the tooth yoke transition piece 2, and the tooth yoke transition piece 2 is formed as an annular magnetic conductive material piece, and in the axial direction of the stator core 100, the tooth yoke transition piece 2 and the stator yoke portion 3 are stacked, and the tooth yoke transition piece 2 and the center hole 11 are positioned and matched to achieve installation and fixation.

[0124] In some embodiments, the yoke transition piece 2 is an integral piece, so that the yoke transition piece 2 can be formed in one piece, thereby reducing processing costs and facilitating installation.

[0125] In some embodiments, the yoke transition piece 2 is a multi-layer structure, and the stator tooth portion 1 is a multi-layer structure. The number of layers of the yoke transition piece 2 is less than the number of layers of the stator tooth portion 1, so that the yoke transition piece 2 has better magnetic conductivity, and the yoke transition piece 2 and the stator tooth portion 1 can both reduce eddy current losses and improve the operating efficiency of the motor.

[0126] In some embodiments, the stator tooth portion 1 includes a plurality of first laminations 15 stacked, such as stacking the plurality of first laminations 15 along the axial direction of the stator core 100, and a center hole 11 is provided in the middle of the stator tooth portion 1. That is, the stator tooth portion 1 includes a plurality of first laminations 15, and the plurality of first laminations 15 are stacked along the axial direction of the stator core 100 to form an integral part, and the thickness of the plurality of first laminations 15 can be set to be the same, or the thickness of at least two of them is different, and the two adjacent first laminations 15 can be connected by bonding or other means, so that the stator tooth portion 1 is constructed as a stable integral part, and the two adjacent first laminations 15 will not separate from each other. Therefore, the stator tooth portion 1 is formed by axial lamination, which is conducive to reducing the eddy current loss of the stator tooth portion 1. In addition, the process of lamination stamping is relatively mature, which makes the manufacturing process of the stator tooth portion 1 more feasible.

[0127] Each of the first laminations 15 may be configured as an annular sheet, so that after a plurality of first laminations 15 are axially stacked, they are configured as an annular member having a central hole 11 in the middle.

[0128] In some embodiments, the tooth yoke transition piece 2 is connected to one axial side of the stator yoke 3, so that the tooth yoke transition piece 2 can play a magnetic conductive role on the axial side of the stator yoke 3, that is, an air gap is formed between two radially adjacent layers of the stator yoke 3, and the air gap is open along the axial direction of the stator core 100. The tooth yoke transition piece 2 and the stator yoke 3 are stacked and distributed in the axial direction, so that the tooth yoke transition piece 2 can eliminate the air gap at the end of the stator yoke 3, thereby helping to reduce the influence of the air gap on the magnetic field lines.

[0129] In some embodiments, the gear yoke transition piece 2 and the stator yoke 3 are axially positioned and matched, that is, a positioning structure is designed between the connecting structure and the stator yoke 3 to fix the two relatively axially, so that the stator yoke 3 will not detach axially from the gear yoke transition piece 2.

[0130] Therefore, after the two are axially positioned, the tooth yoke transition piece 2 is located at one axial end of the stator yoke 3, so that the tooth yoke transition piece 2 can effectively eliminate the air gap between two adjacent layers of the stator yoke 3, and during the use of the suspension motor, the tooth yoke transition piece 2 will not automatically detach axially relative to the stator yoke 3, thereby ensuring the stability of the assembly of the two, thereby reliably reducing the influence of the air gap formed in the stator yoke 3 on the magnetic field lines.

[0131] In addition, the yoke transition piece 2 and the center hole 11 are circumferentially positioned and matched, that is, the yoke transition piece 2 can be circumferentially positioned with the stator tooth portion 1 in the center hole 11 through a positioning structure, so that the stator tooth portion 1 and the yoke transition piece 2 are relatively fixed in the circumferential direction, avoiding relative movement of the two along the circumferential direction, thereby ensuring the stability of the suspension motor.

[0132] In some embodiments, in the axial direction of the stator core 100, a first plug-in portion is provided at the end of the tooth yoke transition piece 2, and a second plug-in portion is provided at the end of the stator yoke 3, and the first plug-in portion and the second plug-in portion are plug-fitted. In other words, when the tooth yoke transition piece 2 and the stator yoke 3 are stacked axially, the two can be axially connected through the plug-fitting of the first plug-in portion and the second plug-in portion.

[0133] The first plug-in portion can be arranged on the end surface of one end of the gear yoke transition piece 2, and the second plug-in portion can be arranged on the end surface of one end of the stator yoke 3. When the gear yoke transition piece 2 and the stator yoke 3 are stacked in the axial direction, the end surface of one end of the gear yoke transition piece 2 and the end surface of one end of the stator yoke 3 are opposite to each other in the axial direction of the stator core 100, and the first plug-in portion and the second plug-in portion are also opposite to each other in the axial direction of the stator core 100, so that the plug-in installation of the two can be achieved by axially approaching each other.

[0134] Therefore, after the first plug-in part and the second plug-in part are axially plugged in, the two can press against each other during the circumferential relative movement along the stator core 100 to limit the relative movement of the tooth yoke transition piece 2 and the stator yoke 3 in the circumferential direction and avoid relative movement. In addition, through the tight fit after the first plug-in part and the second plug-in part are plugged in, the axial slippage of the tooth yoke transition piece 2 and the stator yoke 3 is reduced, and the installation is more stable.

[0135] In some embodiments, the first plug-in portion is a plurality of first plug-in protrusions 23 protruding in the axial direction, that is, the first plug-in portion can be configured as a plurality of first plug-in protrusions 23, the first plug-in protrusions 23 can be protrudingly arranged on the end surface of the gear yoke transition piece 2, and the plurality of first plug-in protrusions 23 are spaced apart and distributed in the circumferential direction of the gear yoke transition piece 2. At the same time, the second plug-in portion is a plurality of first plug-in grooves 31, the first plug-in grooves 31 are configured to be recessed in the end surface of the stator yoke 3, and the plurality of first plug-in grooves 31 are spaced apart and distributed in the circumferential direction of the stator yoke 3.

[0136] Therefore, when the stator yoke 3 and the gear yoke transition piece 2 are axially connected, the multiple first plug-in protrusions 23 and the multiple first plug-in grooves 31 can be plug-fitted one by one, so that the stator yoke 3 and the gear yoke transition piece 2 can be tightly plug-fitted at multiple positions in the circumferential direction, thereby improving the compactness of the connection between the two and preventing axial slippage.

[0137] Specifically, Figure 3 and Figure 4 As shown, the first plug-in protrusions 23 can be set to 9, and the 9 first plug-in protrusions 23 are evenly spaced and distributed along the circumferential direction on the end surface of the gear yoke transition piece 2. At the same time, as shown in FIG. Figure 8 and Fig.10As shown, the number of the first plug-in grooves 31 is also 9, and the 9 first plug-in grooves 31 are evenly spaced and distributed along the circumferential direction on the end surface of the stator yoke 3. Therefore, during actual installation, the 9 first plug-in protrusions 23 can be plugged into the 9 first plug-in grooves 31 one by one, so as to achieve plug-in installation, which greatly improves the assembly tightness of the stator yoke 3 and the gear yoke transition piece 2.

[0138] In some embodiments, Figure 5 and Figure 6 As shown, the yoke transition piece 2 is provided with a slit 24, wherein the slit 24 can be set as a thin slit that penetrates the yoke transition piece 2 axially but not radially. By setting the slit 24, part of the eddy current circuit of the yoke transition piece 2 can be interrupted, thereby reducing the eddy current loss, thereby reducing the overall loss of the motor, and improving the motor thrust and operating efficiency.

[0139] Furthermore, the slit 24 is an open slit, and a thermal conductive glue can be injected into the slit 24 to increase the thermal conductivity, thereby reducing the temperature rise of the stator core 100 and achieving the purpose of reducing iron loss.

[0140] In some embodiments, Figure 5 and Figure 6 As shown, there are multiple slits 24, and multiple slits 24 are arranged at intervals in the circumferential direction of the yoke transition piece 2, so that the yoke transition piece 2 can interrupt the eddy current circuit at multiple positions in the circumferential direction, thereby greatly reducing the worm gear loss and improving the motor performance.

[0141] And if Figure 5 and Figure 6 As shown, the slits 24 may be distributed in groups in the circumferential direction of the yoke transition piece 2 , and each group may include a plurality of slits 24 .

[0142] Among them, the slit 24 can be arranged between two adjacent first plug-in protrusions 23, that is, there are multiple first plug-in protrusions 23, and the multiple first plug-in protrusions 23 are distributed at intervals in the circumferential direction of the yoke transition piece 2, that is, the multiple first plug-in protrusions 23 and the multiple slits 24 can be staggered in the circumferential direction of the yoke transition piece 2, so that the slit 24 is connected to the groove between the two adjacent first plug-in protrusions 23, so that the groove can be formed together with the slit 24, thereby reducing the difficulty of forming.

[0143] In other embodiments, Figure 1 , Figure 2 and Fig.11 As shown, the stator crown 4 is formed as an annular integral part, and the outer peripheral wall of the stator crown 4 is provided with a plurality of wire grooves 42. In other words, the stator crown 4 can be constructed as an integral part and is annular as a whole, so that the stator crown 4 can be integrally sleeved outside the stator tooth portion 1 to reduce the assembly steps of the stator crown 4 and the stator tooth portion 1 and improve the assembly efficiency.

[0144] Furthermore, the stator tooth crown 4 is constructed as an integral part, and three separate wire-passing grooves 42 can be provided, and the stator tooth crown 4 does not need to be axially penetrated, and the molding is also convenient. At the same time, the stator tooth crown 4 is sleeved outside the stator tooth portion 1, and the two can maintain a relatively stable positional relationship in the radial direction, avoiding the problem of the stator tooth crown 4 being radially outwardly separated from the stator tooth crown 4 during threading, thereby improving the stability of the structure.

[0145] That is to say, the stator crown 4 can be constructed as a split type (such as Fig.12 and Fig.13 As shown), it can also be constructed as an integrated type (as shown Fig.11 As shown), both can reduce magnetic resistance and improve magnetic lines of force. Specifically, Fig. 20 As shown, the stator crown 4 is of an integrated type, such as Fig.21 As shown, the stator crown 4 is of a split type, and by comparing the magnetic lines of force of the split type and the integrated type, it can be seen that the integrated stator crown 4 can more effectively reduce the magnetic resistance than the split type, making the magnetic lines of force smoother when passing through the integrated stator crown 4, thereby effectively reducing the magnetic resistance and increasing the motor thrust and efficiency.

[0146] In some embodiments, Fig.11 As shown, a portion of the stator crown 4 is bent inward to define a bent portion 43 having a wire slot 42, as shown in FIG. Figure 7 As shown, the peripheral wall of the stator tooth portion 1 is provided with a second positioning groove 14, and the bent portion 43 is located in the second positioning groove 14, that is, by providing the bent portion 43, the stator tooth crown 4 can be positioned and matched with the stator tooth portion 1 inside it, thereby realizing the circumferential limiting cooperation between the stator tooth crown 4 and the stator tooth portion 1, and at the same time, the wire passing groove 42 on the bent portion 43 is used for threading.

[0147] Specifically, three bent portions 43 that are bent in opposite directions are provided on the inner circumferential wall of the stator tooth crown 4, and at the same time, three second positioning grooves 14 are provided on the outer circumferential wall of the stator tooth portion 1, so that the three bent portions 43 respectively extend into the three second positioning grooves 14 for positioning and matching, thereby improving the compactness of assembly of the two. At the same time, the winding wire of the stator winding 200 can also pass through or pass through the wire grooves 42 of the three bent portions 43. The structure is simple and the installation is convenient, which is conducive to the assembly of the entire motor.

[0148] In some embodiments, Fig.12As shown, the stator tooth crown 4 includes an axial end face 44 and a circumferential side wall 45, and a transition chamfer (not shown in the figure) is provided between the circumferential side wall 45 and at least one axial end face 44. In other words, the stator tooth crown 4 includes two axial end faces 44 that are separated from each other in the axial direction, and a circumferential inner side wall and a circumferential outer side wall that are separated from each other in the radial direction, wherein a transition chamfer may be provided at the connection between the circumferential outer side wall and one axial end face 44, or at the connection between the circumferential outer side wall and both axial end faces 44, or at the connection between the circumferential inner side wall and at least one of the axial end faces 44.

[0149] Therefore, by setting the transition chamfer, the corners of the stator tooth crown 4 can be made relatively smooth, avoiding the corners being too sharp, thereby preventing the corners from being easily deformed due to force, reducing the risk of the corners of the stator tooth crown 4 cutting other objects, and improving the safety of the stator tooth crown 4.

[0150] The transition chamfer may be configured as a straight angle, an arc angle, or other types of chamfers.

[0151] The utility model also provides another stator core 100 .

[0152] like Figure 1 , Figure 2 , Fig.14 and Fig.15 As shown, the stator core 100 according to the embodiment of the utility model comprises: a stator tooth portion 1 , a stator yoke portion 3 and a tooth yoke transition piece 2 .

[0153] A radial magnetic path is formed on the stator tooth portion 1, an axial magnetic path is formed on the stator yoke portion 3, and a connecting magnetic path is formed on the tooth yoke transition piece 1. The magnetic path of the stator core 100 includes a radial magnetic path, an axial magnetic path and a connecting magnetic path. The connecting magnetic path is used to connect the radial magnetic path and the axial magnetic path.

[0154] Therefore, by setting the tooth yoke transition piece 2, the radial magnetic path and the axial magnetic path of the stator yoke 3 and the stator tooth part 1 can be connected, thereby reducing the magnetic resistance between the radial magnetic path and the axial magnetic path, which is beneficial to improving the thrust of the motor and increasing the operating efficiency of the motor.

[0155] In some embodiments, the tooth yoke transition piece 2 is located on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3. As a result, the tooth yoke transition piece 2 can play a magnetic conductive role on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3, thereby helping to reduce the magnetic resistance between the stator yoke portion 3 and the stator tooth portion 1, thereby improving the motor thrust and increasing the motor operating efficiency.

[0156] In some embodiments, the stator tooth portion 1 is a multi-layer structure, and the radial projections of the yoke transition piece 2 and the stator tooth portion 1 at least partially overlap, that is, at least part of the yoke transition piece 2 is located in the radial direction of the stator tooth portion 1. The yoke transition piece 2 can be installed in the stator tooth portion 1 so that the yoke transition piece 2 can eliminate the air gap between the multi-layer structure of the stator tooth portion 1 and the stator yoke portion 3, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0157] And / or, the stator yoke 3 is a multi-layer structure, and the axial projections of the tooth yoke transition piece 2 and the stator yoke 3 at least partially overlap, that is, at least part of the tooth yoke transition piece 2 is located in the axial direction of the stator yoke 3. For example, the tooth yoke transition piece 2 and the stator yoke 3 can be axially arranged opposite each other so that the tooth yoke transition piece 2 can eliminate the air gap between the multi-layer stator yoke 3 and the stator tooth portion 1, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0158] In some embodiments, the yoke transition piece 2 is connected to the radial inner side of the stator tooth portion 1, wherein a center hole 11 may be formed in the stator tooth portion 1, and the yoke transition piece 2 may be disposed in the center hole 11 to eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3 on the radial inner side of the stator tooth portion 1, thereby reducing the magnetic resistance of the stator tooth portion 1 and improving the operating efficiency of the motor.

[0159] In some embodiments, the axial extension dimension of the yoke transition piece 2 is greater than or equal to the axial extension dimension of the stator tooth portion 1. In other words, the yoke transition piece 2 and the stator tooth portion 1 can both be constructed as annular pieces, and the yoke transition piece 2 is located inside the stator tooth portion 1 and the two can be coaxially arranged, so that the yoke transition piece 2 can reduce the influence of the air gap at various axial positions of the stator tooth portion 1 on the magnetic resistance.

[0160] In some embodiments, a side surface of the yoke transition piece 2 away from the stator yoke 3 is flush with a side surface of the stator tooth portion. In the axial direction, a side surface of the yoke transition piece 2 close to the stator yoke 3 is located between the stator tooth portion 1 and the stator yoke 3.

[0161] like Figure 1 As shown, the gear yoke transition piece 2 is Figure 1 The upper surface is flush with the upper surface of the stator yoke 3. Figure 2 As shown, the gear yoke transition piece 2 is Figure 1 The middle upper surface is located between the stator tooth portion 1 and the stator yoke portion 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3, thereby reducing the magnetic resistance generated by the air gap and the space between the two.

[0162] In some embodiments, the tooth yoke transition piece 2 is a magnetic conductive material piece, so that the tooth yoke transition piece 2 can guide the magnetic field lines, reduce the influence of the air gap between the stator tooth portion 1 and the stator yoke portion 3 on the magnetic field lines, and reduce the magnetic resistance. The stator yoke portion 3 and the stator tooth portion 1 can be connected through the tooth yoke transition piece 2, and the tooth yoke transition piece 2 is formed as an annular magnetic conductive material piece, and in the axial direction of the stator core 100, the tooth yoke transition piece 2 and the stator yoke portion 3 are stacked, and the tooth yoke transition piece 2 and the center hole 11 are positioned and matched to achieve installation and fixation.

[0163] In some embodiments, the yoke transition piece 2 is an integral piece, so that the yoke transition piece 2 can be formed in one piece, thereby reducing processing costs and facilitating installation.

[0164] In some embodiments, the yoke transition piece 2 is a multi-layer structure, and the stator tooth portion 1 is a multi-layer structure. The number of layers of the yoke transition piece 2 is less than the number of layers of the stator tooth portion 1, so that the yoke transition piece 2 has better magnetic conductivity, and the yoke transition piece 2 and the stator tooth portion 1 can both reduce eddy current losses and improve the operating efficiency of the motor.

[0165] In some embodiments, the stator tooth portion 1 includes a plurality of first laminations 15 stacked, such as stacking the plurality of first laminations 15 along the axial direction of the stator core 100, and a center hole 11 is provided in the middle of the stator tooth portion 1. That is, the stator tooth portion 1 includes a plurality of first laminations 15, and the plurality of first laminations 15 are stacked along the axial direction of the stator core 100 to form an integral part, and the thickness of the plurality of first laminations 15 can be set to be the same, or the thickness of at least two of them is different, and the two adjacent first laminations 15 can be connected by bonding or other means, so that the stator tooth portion 1 is constructed as a stable integral part, and the two adjacent first laminations 15 will not separate from each other. Therefore, the stator tooth portion 1 is formed by axial lamination, which is conducive to reducing the eddy current loss of the stator tooth portion 1. In addition, the process of lamination stamping is relatively mature, which makes the manufacturing process of the stator tooth portion 1 more feasible.

[0166] Each of the first laminations 15 may be configured as an annular sheet, so that after a plurality of first laminations 15 are axially stacked, they are configured as an annular member having a central hole 11 in the middle.

[0167] In some embodiments, the stator yoke 3 is formed as a winding part, that is, the stator yoke 3 is a multi-layer part formed by winding in sequence along the circumferential direction, and specifically, it can be a whole piece of silicon steel sheet spirally wound around the axis, that is, Fig. 9As shown, one end of the stator yoke 3 is located inside and the other end is located outside. The stator yoke 3 can be formed by stamping and winding, and the winding head end 32 and tail end 33 can be fixed by resistance welding or other methods. Therefore, the stator yoke 3 formed by circumferential winding effectively blocks the eddy current circuit compared to a structure of a whole conductor, thereby helping to reduce the eddy current loss of the stator yoke 3. In addition, the process of winding the magnetic core of the axial flux motor is relatively mature, making the manufacturing process of the stator yoke 3 more feasible.

[0168] Therefore, the alpha coil winding can be nested in the stator yoke 3 and placed on the stator tooth 1. When the motor is running, the magnetic flux mainly passes through the iron core along the radial direction of the stator tooth 1 and the axial direction of the stator yoke 3. Therefore, the stator tooth 1 of the axially stacked rail sheets can better block the tooth eddy current circuit to reduce the eddy current loss of the stator tooth 1. At the same time, the stator yoke 3 of the circumferentially wound rail sheets can also effectively block the eddy current circuit of the stator yoke 3 to reduce the eddy current loss of the stator yoke 3. The combination of the two can further increase the motor thrust and the total motor loss, which is beneficial to improving the motor operation efficiency.

[0169] In some embodiments, the tooth yoke transition piece 2 is connected to one axial side of the stator yoke 3, so that the tooth yoke transition piece 2 can play a magnetic conductive role on the axial side of the stator yoke 3, that is, an air gap is formed between two radially adjacent layers of the stator yoke 3, and the air gap is open along the axial direction of the stator core 100. The tooth yoke transition piece 2 and the stator yoke 3 are stacked and distributed in the axial direction so that the tooth yoke transition piece 2 can eliminate the air gap at the end of the stator yoke 3, thereby helping to reduce the influence of the air gap extending along the axial direction of the stator yoke 3 on the magnetic field lines.

[0170] In some embodiments, the gear yoke transition piece 2 and the stator yoke 3 are axially positioned and matched, that is, a positioning structure is designed between the connecting structure and the stator yoke 3 to fix the two relatively axially, so that the stator yoke 3 will not detach axially from the gear yoke transition piece 2.

[0171] Therefore, after the two are axially positioned, the tooth yoke transition piece 2 is located at one axial end of the stator yoke 3, so that the tooth yoke transition piece 2 can effectively eliminate the air gap between two adjacent layers of the stator yoke 3, and during the use of the suspension motor, the tooth yoke transition piece 2 will not automatically detach axially relative to the stator yoke 3, thereby ensuring the stability of the assembly of the two, thereby reliably reducing the influence of the air gap formed in the stator yoke 3 on the magnetic field lines.

[0172] In addition, the yoke transition piece 2 and the center hole 11 are circumferentially positioned and matched, that is, the yoke transition piece 2 can be circumferentially positioned with the stator tooth portion 1 in the center hole 11 through a positioning structure, so that the stator tooth portion 1 and the yoke transition piece 2 are relatively fixed in the circumferential direction, avoiding relative movement of the two along the circumferential direction, thereby ensuring the stability of the suspension motor.

[0173] Furthermore, combined with Figure 17-Figure 19 The effects of the technical features of the utility model and the prior art can be compared and analyzed, among which: Fig.17 It is a graph showing the relationship between the magnetic resistance and time of the stator core in the prior art and the present invention. Fig.18 This is a graph showing the relationship between thrust and time of the suspension motor in the prior art and the present invention. Fig.19 It is a simulation diagram of magnetic lines of force corresponding to two stator tooth crowns of the utility model in the prior art.

[0174] The utility model also provides a stator assembly 1000 .

[0175] According to the stator assembly 1000 of the embodiment of the utility model, it includes: a stator core 100 and a stator winding 200 . The stator core 100 is the stator core 100 of any of the above embodiments. The stator winding 200 is placed on the stator teeth 1 and is covered on the stator yoke 3 .

[0176] Therefore, the stator teeth 1 can support the stator winding 200 , and the stator yoke 3 can limit the stator winding 200 , thereby enhancing the structural stability of the stator winding 200 . At the same time, the stator winding 200 is sheathed on the stator yoke 3 .

[0177] In addition, the stator winding 200 can fully utilize the space between the stator teeth 1 and the stator yoke 3, thereby improving space utilization, thereby reducing the overall structural size of the stator assembly 1000 and facilitating the miniaturization design of the stator assembly 1000.

[0178] In particular, when the suspension motor is running, the magnetic lines of force mainly extend along the radial direction in the stator tooth portion 1 and the axial direction in the stator yoke portion 3, and the stator tooth portion 1 can largely weaken the eddy current loss generated in the stator tooth portion 1 through the axially stacked first laminations 15. The effect of the circumferentially wound winding is equivalent to the effect of axially stacking the first laminations 15 to weaken the eddy current loss of the stator tooth portion 1, and the eddy current loss in the stator yoke portion 3 can be largely weakened.

[0179] According to the stator assembly 1000 of the embodiment of the utility model, the stator tooth portion 1 is composed of a plurality of first laminations 15 stacked in the axial direction so as to reduce the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or a stacked member so as to reduce the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly reduced, thereby improving the thrust and efficiency of the suspension motor.

[0180] Furthermore, by providing the tooth yoke transition piece 2, not only can the connection between the stator yoke 3 and the stator tooth 1 be achieved, but also the air gap between the stator yoke 3 and the stator tooth 1 can be eliminated, and the influence of the air gap at the connection between the stator tooth 1 and the stator yoke 3 on the magnetic field lines can be reduced, thereby greatly reducing the influence of the air gap formed in the motor on the magnetic field lines, which is beneficial to improving the motor thrust and increasing the motor operating efficiency.

[0181] The utility model also provides a stator assembly.

[0182] The stator assembly according to the embodiment of the utility model includes the stator component 1000 described in any one of the above embodiments, and a plurality of stator components 1000 are provided, and the plurality of stator components 1000 are stacked in the axial direction, and power can be driven by the plurality of stator components 1000.

[0183] Among them, in the stator assembly, the stator tooth portion 1 is composed of a plurality of first laminations 15 stacked axially to reduce the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or stacked member to reduce the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly reduced, thereby improving the thrust and efficiency of the suspension motor.

[0184] Furthermore, by providing the tooth yoke transition piece 2, not only can the connection between the stator yoke 3 and the stator tooth portion 1 be achieved, but also the air gap formed between the stator yoke 3 and the stator tooth portion 1 can be eliminated, and the influence of the air gap at the connection between the stator tooth portion 1 and the stator yoke 3 on the magnetic field lines can be reduced, thereby greatly reducing the influence of the air gap formed in the motor on the magnetic field lines, which is beneficial to improving the motor thrust and increasing the motor operating efficiency.

[0185] In some embodiments, the stator assembly further includes a connecting rod, and the stator cores of the multiple stator assemblies 1000 are arranged on the connecting rod, so that the multiple stator assemblies 1000 are connected as a whole through the connecting rod. Among them, the stator core 100 of the stator assembly 1000 can be interference-fitted with the connecting rod, which is conducive to the overall installation of the stator assembly, reducing the installation steps and improving the installation efficiency. In addition, the multiple stator assemblies 1000 all have good magnetic field force, which is conducive to improving the operating performance of the stator assembly.

[0186] In some embodiments, the connecting rod passes through the stator core 100, and the yoke transition piece 2 is provided with a positioning portion 25 that limits the circumference of the connecting rod, wherein the positioning portion 25 can be constructed as a positioning boss, and the positioning boss can be arranged to protrude from the inner circumferential wall of the yoke transition piece 2, so that when the connecting rod is passed through the yoke transition piece 2, the two can be positioned and pressed by the positioning boss, thereby preventing the stator core 100 from rotating relative to the connecting rod, thereby ensuring the stability of the stator assembly.

[0187] The positioning boss can be constructed in an arc shape, and a positioning groove can be provided on the outer peripheral wall of the connecting rod, so that the positioning boss can extend into the positioning groove for positioning and matching, thereby achieving circumferential fixation.

[0188] The utility model also provides a suspension motor.

[0189] According to the embodiment of the utility model, the suspension motor includes: a stator assembly and a mover assembly, the stator assembly is the stator assembly of any one of the above embodiments, and the mover assembly moves and cooperates with the stator assembly. That is, the suspension motor is a linear motor. According to the embodiment of the utility model, the stator tooth portion 1 of the stator assembly is stacked axially by a plurality of first laminations 15 to reduce the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or a stacking member to reduce the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly reduced, reducing the influence of the air gap formed in the motor on the magnetic field lines, which is conducive to improving the thrust of the motor and increasing the operating efficiency of the motor.

[0190] The utility model also proposes a suspension system, comprising a suspension motor of any one of the above embodiments, wherein one of the stator assembly and the mover assembly is suitable for connecting to a vehicle body, and the other of the stator assembly and the mover assembly is suitable for connecting to a wheel.

[0191] Therefore, the suspension motor can be used to transmit the force and torque acting between the wheels and the vehicle body, and to buffer the impact force transmitted to the vehicle body by the uneven road surface, thereby playing a vibration reduction role to ensure that the vehicle can run smoothly.

[0192] According to the suspension system of the embodiment of the utility model, the stator tooth portion 1 of the stator assembly is stacked axially by multiple first laminations 15 to reduce the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or a stacked member to reduce the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly reduced, thereby improving the thrust and efficiency of the suspension motor, reducing the influence of the air gap formed in the motor on the magnetic field lines, and facilitating the improvement of the motor thrust and the increase of the motor operation efficiency.

[0193] The utility model also provides a vehicle, comprising the suspension system of any one of the above embodiments.

[0194] According to the vehicle of the embodiment of the utility model, the stator tooth portion 1 of the stator assembly is composed of a plurality of first laminations 15 stacked axially to reduce the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or a stacked member to reduce the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly reduced, thereby improving the thrust and efficiency of the suspension motor, reducing the influence of the air gap formed in the motor on the magnetic field lines, and facilitating the improvement of the motor thrust and the increase of the motor operating efficiency.

[0195] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0196] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0197] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0198] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0199] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0200] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator core, characterized in that: include: stator teeth; A stator yoke, wherein the stator yoke is connected to the stator teeth in the axial direction of the stator yoke, and at least a part of the structure of the stator yoke protrudes from the stator teeth to form a coil accommodating slot, and at least one of the stator teeth and the stator yoke is formed into a multi-layer structure; A stator tooth crown is connected to the radial outer side of the stator tooth portion. In the axial direction of the stator core, at least one axial end of the stator tooth crown protrudes from the axial end surface of the stator tooth portion.

2. The stator core according to claim 1, characterized in that: The stator crown includes a plurality of second laminations, and the plurality of second laminations are stacked along the axial direction of the stator core.

3. The stator core according to claim 1, characterized in that: In the circumferential direction of the stator core, the stator tooth crown includes a plurality of sub-crown portions spaced apart along the circumferential direction, and two adjacent sub-crown portions define a wire passing slot.

4. The stator core according to claim 3, characterized in that: At least one of the sub-crown parts includes a plurality of second laminations, and the plurality of second laminations are stacked along the axial direction of the stator core.

5. The stator core according to claim 2, characterized in that: The stator teeth include a plurality of first laminations stacked in the axial direction of the stator core, and / or The stator yoke is a winding part.

6. The stator core according to claim 5, characterized in that: The first laminate and the second laminate have the same thickness, and the number of the second laminate is greater than the number of the first laminate.

7. The stator core according to claim 5, characterized in that: In the axial direction of the stator core, the height of the stator tooth crown is greater than the height of the stator tooth portion, and a side surface of the stator tooth crown is flush with a side surface of the stator tooth portion.

8. The stator core according to claim 7, characterized in that: In the axial direction of the stator core, a height difference between the stator tooth crown and the stator tooth portion is a multiple of the first lamination.

9. The stator core according to any one of claims 2 to 8, characterized in that: The stator teeth are provided with a central hole, and the stator core further comprises: A tooth yoke transition piece, wherein the stator tooth portion and the stator yoke portion are both connected to the tooth yoke transition piece.

10. The stator core according to claim 9, characterized in that: The gear yoke transition piece and the stator yoke part are axially positioned and matched, and the gear yoke transition piece and the center hole are circumferentially positioned and matched.

11. The stator core according to claim 10, characterized in that: One of the yoke transition piece and the stator tooth portion is provided with a first positioning protrusion and the other is provided with a first positioning groove, and the first positioning protrusion and the first positioning groove are plug-fitted to limit the circumferential position of the stator tooth portion.

12. The stator core according to claim 11, characterized in that: In the circumferential direction of the stator tooth portion, opposite side walls of the first positioning groove extend obliquely toward each other in a direction toward the center hole, and the first positioning protrusion and the first positioning groove are conformally matched.

13. The stator core according to claim 11, characterized in that: One of the yoke transition piece and the stator tooth portion is provided with a guide protrusion and the other is provided with a guide groove, and the guide protrusion is suitable for matching with the guide groove.

14. The stator core according to claim 13, characterized in that: The outer peripheral wall of the guide protrusion is formed as an arc-shaped surface, and the guide groove is formed as an arc-shaped groove.

15. The stator core according to claim 13, characterized in that: The guide groove and the first positioning protrusion are respectively arranged on the outer peripheral wall of the gear yoke transition piece, and the guide groove and the first positioning protrusion are respectively multiple and staggered along the circumferential direction of the gear yoke transition piece.

16. The stator core according to claim 9, characterized in that: In the axial direction of the stator core, a first plug-in portion is provided at the end of the gear yoke transition piece, and a second plug-in portion is provided at the end of the stator yoke portion, and the first plug-in portion and the second plug-in portion are plug-fitted.

17. The stator core according to claim 16, characterized in that: The first plug-in portion is a plurality of first plug-in protrusions protruding along the axial direction, and the second plug-in portion is a plurality of first plug-in grooves. The plurality of first plug-in protrusions and the plurality of first plug-in grooves are plug-fitted in a one-to-one correspondence.

18. The stator core according to claim 9, characterized in that: The gear yoke transition piece is provided with a slit.

19. The stator core according to claim 18, characterized in that: There are a plurality of slits, and the plurality of slits are arranged at intervals in the circumferential direction of the gear yoke transition piece.

20. A stator assembly, characterized in that: include: A stator core, wherein the stator core is a stator core according to any one of claims 1 to 19; The stator winding is placed on the stator teeth and is sheathed on the stator yoke.

21. A suspension motor, characterized in that: include: A stator assembly, wherein the stator assembly is the stator assembly according to claim 20; A mover assembly is movably matched with the stator assembly.

22. A suspension system, characterized in that: It comprises the suspension motor according to claim 21, wherein one of the stator assembly and the mover assembly is suitable for connection with a vehicle body, and the other of the stator assembly and the mover assembly is suitable for connection with a wheel.

23. A vehicle, characterized in that: Comprising a suspension system according to claim 22.

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