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

Abstract

The present application discloses a stator core, a stator assembly, a suspension motor, a suspension system, and a vehicle. The stator core comprises: a stator tooth part; a stator yoke part, wherein the stator yoke part is connected to 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 is formed into a multi-layer structure; and a stator tooth crown, wherein 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 core.

Description

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

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 2024206878146, application date April 3, 2024, and name “Stator core, stator assembly, suspension motor, suspension system and vehicle”, and claims the priority of the above Chinese patent application. The entire content of the above Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of motor technology, and in particular to a stator core, a stator assembly, a suspended motor, a suspension system, and a vehicle. Background Art

[0004] 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, and there is room for improvement. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a stator core that can significantly reduce eddy current losses in the stator core, reduce the impact of the air gap on the magnetic field lines, and thereby improve the thrust and efficiency of the levitation motor.

[0006] According to an embodiment of the present application, the stator core includes: a stator tooth portion; a stator yoke portion, wherein the stator yoke portion and the stator tooth portion are connected in the axial direction of the stator yoke portion, and at least part of the structure of the stator yoke portion protrudes from the stator tooth portion to form a coil accommodating slot; a stator tooth crown, wherein the stator tooth crown is connected to the radial outer side of the stator tooth portion, and 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.

[0007] According to the stator core of the embodiment of the present application, 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 provision of the stator tooth crown can reduce the magnetic resistance of the stator core on the outside of the stator tooth, thereby effectively improving the motor thrust and the overall operating efficiency of the motor.

[0008] According to the stator core of some embodiments of the present application, the stator tooth crown 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 application, 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 slot.

[0010] According to the stator core of some embodiments of the present application, 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.

[0011] According to the stator core of some embodiments of the present application, the stator teeth include a plurality of first laminations stacked along the axial direction of the stator core, and / or

[0012] The stator yoke is a wound part.

[0013] According to the stator core of some embodiments of the present application, 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.

[0014] According to the stator core of some embodiments of the present application, 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.

[0015] According to the stator core of some embodiments of the present application, 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.

[0016] According to the stator core of some embodiments of the present application, 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.

[0017] According to the stator core of some embodiments of the present application, the tooth yoke transition piece and the stator yoke part are axially positioned and matched, and the tooth yoke transition piece and the center hole are circumferentially positioned and matched.

[0018] According to the stator core of some embodiments of the present application, one of the tooth 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.

[0019] According to the stator core of some embodiments of the present application, 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.

[0020] According to the stator core of some embodiments of the present application, 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.

[0021] According to the stator core of some embodiments of the present application, 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.

[0022] According to the stator core of some embodiments of the present application, the guide groove and the first positioning protrusion are respectively arranged on the outer peripheral wall of the tooth yoke transition piece, and the guide groove and the first positioning protrusion are respectively multiple and staggered along the circumference of the tooth yoke transition piece.

[0023] According to the stator core of some embodiments of the present application, 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.

[0024] According to the stator core of some embodiments of the present application, 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.

[0025] According to the stator core of some embodiments of the present application, the tooth yoke transition piece is provided with a slit.

[0026] According to the stator core of some embodiments of the present application, there are multiple slits, and the multiple slits are arranged at intervals in the circumferential direction of the tooth yoke transition piece.

[0027] The application also proposes a stator assembly.

[0028] According to an embodiment of the present application, the stator assembly 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 externally mounted on the stator yoke.

[0029] The present application also proposes a suspension motor.

[0030] According to an embodiment of the present application, the levitation motor includes: a stator assembly, which is the stator assembly described in any one of the above embodiments; and a mover assembly, which is movably matched with the stator assembly.

[0031] The present application 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.

[0032] The present application also proposes a vehicle comprising the suspension system described in any one of the above embodiments.

[0033] 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 to the prior art, which will not be described in detail here.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] FIG1 is a schematic structural diagram of a stator core according to some embodiments of the present application;

[0037] FIG2 is a schematic structural diagram of a stator core according to some embodiments of the present application (from another side perspective);

[0038] FIG3 is a schematic structural diagram of a gear yoke transition piece according to some embodiments of the present application;

[0039] FIG4 is a schematic structural diagram of a gear yoke transition piece according to some embodiments of the present application (from another side perspective);

[0040] FIG5 is a side end view of a yoke transition piece according to other embodiments of the present application;

[0041] FIG6 is a schematic structural diagram of a gear yoke transition piece according to other embodiments of the present application;

[0042] FIG7 is a schematic structural diagram of a stator tooth according to some embodiments of the present application;

[0043] FIG8 is a schematic structural diagram of a stator yoke according to some embodiments of the present application;

[0044] FIG9 is an enlarged view of point A in FIG8 ;

[0045] FIG10 is a schematic structural diagram of a stator yoke according to some embodiments of the present application (from another side perspective);

[0046] FIG11 is a schematic structural diagram of a stator tooth crown according to some embodiments of the present application;

[0047] FIG12 is a schematic structural diagram of a stator core according to other embodiments of the present application;

[0048] FIG13 is a schematic structural diagram of a stator tooth crown according to other embodiments of the present application;

[0049] FIG14 is a schematic structural diagram of a stator core according to yet other embodiments of the present application;

[0050] FIG15 is a schematic structural diagram of a stator core according to yet other embodiments of the present application (from another side perspective);

[0051] FIG16 is a schematic structural diagram of a gear yoke transition piece according to yet other embodiments of the present application;

[0052] FIG17 is a diagram showing the relationship between the magnetic resistance and time of the stator core in the prior art and the present application;

[0053] FIG18 is a graph showing the relationship between thrust and time of a levitation motor in the prior art and the present application;

[0054] FIG19 is a simulation diagram of magnetic lines of force corresponding to two stator tooth crowns in the prior art and the present application;

[0055] FIG20 is a simulation diagram of the magnetic lines of force of the stator core of the present application (the stator crown is an integrated type);

[0056] FIG21 is a simulation diagram of the magnetic lines of force of the stator core of the present application (the stator tooth crown is a split type).

[0057] Reference numerals:

[0058] stator assembly 1000,

[0059] stator core 100,

[0060] 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, bend 43, axial end face 44, circumferential side wall 45, second lamination 46;

[0061] Stator winding 200 . DETAILED DESCRIPTION

[0062] The following describes in detail embodiments of the present application, examples of which 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 intended to be used to explain the present application, and should not be construed as limiting the present application.

[0063] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0064] The stator core 100 according to an embodiment of the present application is described below with reference to Figures 1 to 16. The stator core 100 can be applied to the stator assembly of a levitation motor, and can effectively reduce eddy current losses, thereby helping to increase the thrust and efficiency of the levitation motor, enhance the operating performance of the levitation motor, and reduce the cost of using the levitation motor.

[0065] As shown in FIG. 1 , FIG. 2 , FIG. 14 and FIG. 15 , the stator core 100 according to an embodiment of the present application includes: a stator tooth portion 1 , a stator yoke portion 3 and a stator tooth crown 4 .

[0066] The stator yoke 3 is axially connected to the stator tooth 1. The stator yoke 3 and the stator tooth 1 may be connected by methods including, but not limited to, welding, plugging, or clamping, or indirectly connected via other structural components. Furthermore, when connecting the stator yoke 3 and the stator tooth 1, the axis of the stator yoke 3 and the axis of the stator tooth 1 may be aligned.

[0067] 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 multi-layer structures. Among them, the multi-layer structure can be installed and set by stacking or winding. Therefore, compared with the whole piece, the multi-layer stator yoke 3 and stator tooth 1 effectively block the eddy current circuit, which is beneficial to reduce the eddy current loss of the stator yoke 3.

[0068] 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. 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.

[0069] 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 outside of the stator tooth part 1, that is, the stator tooth part 1 is accommodated in the stator tooth crown 4.

[0070] The stator tooth crown 4 may be a structural component made of magnetic conductive material such as DT4 or No. 10 steel, or may be made of other types of magnetic conductive materials.

[0071] In the axial direction of the stator core 100, at least one axial end portion 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 outside of the stator tooth portion 1, the stator slot can be partially blocked by the part of the stator tooth crown 4 that protrudes from the stator tooth portion 1 in the axial direction, thereby optimizing the stator slot, thereby reducing the magnetic resistance of the stator core 100, thereby helping to reduce the thrust fluctuation of the motor and ensure the operating efficiency of the motor.

[0072] In actual design, one end of the stator tooth crown 4 can protrude from the end face of the stator tooth 1, or both ends of the stator tooth crown 4 can be configured to protrude from the end faces of the stator tooth 1 to enhance the optimization effect on the stator slot. Specifically, as shown in Figure 2, the stator tooth crown 4 is configured to protrude from the upper end face of the stator tooth 1 to reduce the magnetic resistance on the upper side of the stator tooth 1. This configuration is flexible and optional.

[0073] In which, 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.

[0074] According to the stator core 100 of the embodiment of the present application, 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 outside of the stator tooth 1 to play a magnetic conductive role, which is beneficial to reducing the electromagnetic resistance outside the coil accommodating slot, thereby effectively improving the motor thrust and the overall operating efficiency of the motor.

[0075] In some embodiments, as shown in Figures 12 and 13, the stator crown 4 includes a plurality of second laminations 46, which are stacked along the axial direction of the stator core 100. That is, the stator crown 4 is formed by stacking the plurality of second laminations 46 along the axial direction. In this way, the stator crown 4 can be divided into the plurality of second laminations 46 and processed separately, which helps to reduce the processing difficulty of the stator crown 4 and reduce the setting cost.

[0076] 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 means, so that the stator crown 4 is constructed as a stable whole, and the two adjacent second laminations 46 will not separate from each other. The stator crown 4 is formed in the direction of axial lamination, which is also conducive to reducing the eddy current loss of the stator crown 4 and improving the motor performance.

[0077] 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 .

[0078] 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.

[0079] Among them, the 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. In this way, 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 coordination of the stator winding 200 and the stator core 100.

[0080] Specifically, three sub-crown portions 41 can be provided, as shown in Figures 1, 2, 12, and 13. The three sub-crown portions 41 are evenly spaced and distributed in the circumferential direction of the stator tooth portion 1, so that three wire grooves 42 are formed on the outer peripheral wall of the stator tooth portion 1. It can be understood that the stator core 100 in this application can be applied to a three-phase permanent magnet synchronous levitation motor, and the three-phase wiring can be respectively routed through the three wire grooves 42, facilitating the installation of the motor.

[0081] 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 defined to facilitate the threading of the stator winding 200, with a simple structure and easy use.

[0082] In some embodiments, at least one sub-crown 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 42 can be configured to include a plurality of second laminations 46, or two or three to multiple sub-crowns 42 can be configured to include a plurality of second laminations 46. The structure is simple and the installation is convenient.

[0083] In some embodiments, the stator tooth portion 1 includes a plurality of stacked first laminations 15. For example, the plurality of first laminations 15 are stacked axially along 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, which are stacked axially along the stator core 100 to form a single integral piece. The thicknesses of the plurality of first laminations 15 can be set to be the same, or at least two of the first laminations 15 can have different thicknesses. Adjacent first laminations 15 can be connected by bonding or other means to form the stator tooth portion 1 as a stable integral piece, and adjacent first laminations 15 will not separate from each other. Thus, forming the stator tooth portion 1 by axial lamination is beneficial for reducing eddy current losses in the stator tooth portion 1. Furthermore, the lamination stamping process is relatively mature, making the manufacturing process of the stator tooth portion 1 more feasible.

[0084] 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.

[0085] In some embodiments, the thickness of the first laminations 15 and the second laminations 46 are the same, 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.

[0086] 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 .

[0087] As shown in Figure 1, the upper surface of the tooth yoke transition piece 2 in Figure 1 is flush with the upper surface of the stator yoke 3. At the same time, as shown in Figure 2, the upper surface of the tooth yoke transition piece 2 in Figure 1 is located between the stator tooth portion 1 and the stator yoke 3, so that the part of the stator tooth crown 4 that is higher than the stator tooth portion 1 can play a magnetic conductive role, thereby reducing the magnetic resistance.

[0088] 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 portion 1 is a multiple of the first lamination stack 15 .

[0089] 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 can be 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. In this way, the difficulty of forming the stator tooth crown 4 can be reduced, and a larger number of second laminations 46 can be stacked to form the stator tooth crown 4.

[0090] 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 through the tooth yoke transition piece 2. In this way, 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 simultaneously eliminate the air gap between the stator yoke portion 3 and the stator tooth portion 1 of the multi-layer structure.

[0091] 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 part 1, but also eliminate the air gap between the stator yoke 3 and the stator tooth part 1, and reduce the influence of the air gap at the connection between the stator tooth part 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.

[0092] In some embodiments, the tooth 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 so that the two are relatively fixed in the axial direction, so that the stator yoke 3 will not detach axially from the tooth yoke transition piece 2.

[0093] Thus, after axial positioning, the tooth-yoke transition piece 2 is located at one axial end of the stator yoke 3, allowing the tooth-yoke transition piece 2 to eliminate the air gap between the stator yoke 3 and the stator teeth 1. During operation of the levitation motor, the tooth-yoke transition piece 2 will not automatically axially disengage from the stator yoke 3, ensuring the stability of their assembly and reliably reducing the impact of the air gap formed in the stator yoke 3 on the magnetic field lines.

[0094] 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, and ensuring the stability of the suspension motor.

[0095] In some embodiments, the stator yoke 3 is formed as a wound part, that is, the stator yoke 3 is a multi-layer part formed by sequentially winding in the circumferential direction. Specifically, it can be formed by spirally winding a whole piece of silicon steel sheet around the axis, that is, as shown in Figure 9, one end of the stator yoke 3 is located on the inner side and the other end is located on the outer side. Among them, the stator yoke 3 can adopt a stamping winding process, and the winding head end 32 and the 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 the 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.

[0096] 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.

[0097] 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 plugged together to limit the circumferential position of the stator tooth portion 1 .

[0098] 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. 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, thereby fixing the yoke transition piece 2 and the stator tooth portion 1 relative to each other in the circumferential direction.

[0099] Specifically, a first positioning protrusion 21 can be provided on the yoke transition piece 2, and a first positioning groove 12 can be provided on the stator tooth portion 1, or a first positioning protrusion 21 can be provided on the stator tooth portion 1, and a 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, as shown in Figures 3 and 4, a first positioning protrusion 21 is provided on the outer peripheral wall of the yoke transition piece 2, and as shown in Figure 7, 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 plugged into the first positioning groove 12 of the stator tooth portion 1, performing circumferential limit fit.

[0100] Furthermore, both the first positioning protrusion 21 and the first positioning groove 12 can be set to multiple, and the multiple first positioning protrusions 21 and the multiple first positioning grooves 12 are matched one-to-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. Specifically, as shown in Figures 3 and 4, the first positioning protrusions 21 are set to three, and the three first positioning protrusions 21 are distributed spaced apart in the circumferential direction of the tooth yoke transition piece 2. At the same time, as shown in Figure 7, there are three first positioning grooves 12, and the three first positioning grooves 12 are distributed spaced apart in the circumferential direction of the stator tooth portion 1. Thus, as shown in Figures 1 and 2, 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.

[0101] In some embodiments, as shown in Figure 7, 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 that are relatively distributed on the circumference of the stator tooth portion 1, and the two inner side walls are inclined side walls, that is, the circumferential spacing between the two inner side walls 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.

[0102] The first positioning protrusion 21 and the first positioning groove 12 are conformally matched, as shown in Figures 3 and 4, that is, the shapes 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 use 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.

[0103] It should be noted that before stacking the multiple first laminations 15 into the stator tooth portion 1, each first lamination 15 is constructed to have a groove portion. After the multiple first laminations 15 are stacked, the groove portions of the multiple first laminations 15 are aligned along the axial direction of the stator tooth portion 1 to jointly construct the first positioning groove 12.

[0104] 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 stator tooth portion 1 is processing the center hole 11, the first positioning groove 12 and the center hole 11 can be formed together, thereby helping to reduce the setting cost.

[0105] Therefore, when the yoke transition piece 2 is installed in the center hole 11, the first positioning protrusion 21 extends into the first positioning groove 12 on the outer peripheral wall of the yoke transition piece 2 to achieve limiting cooperation with the stator tooth part 1, which has a simple structure and is easy to install.

[0106] As shown in Figures 3 and 4 , the first positioning protrusion 21 is provided on the outer circumferential wall of the yoke transition piece 2. The thickness of the first positioning protrusion 21 can be set to be the same as the axial thickness of the yoke transition piece 2, facilitating their integral molding. As shown in Figure 7 , the first positioning groove 12 is provided on the inner circumferential wall of the stator tooth portion 1. The first positioning groove 12 can be set to extend axially through the stator tooth portion 1, facilitating the co-molding of the first positioning groove 12 and the center hole 11.

[0107] 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.

[0108] 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.

[0109] Among them, 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 the guide protrusion 13 can be provided on the stator tooth portion 1 as shown in Figure 7, and the guide groove 22 can be provided on the yoke transition piece 2 as shown in Figures 3-6. The setting method is flexible and optional.

[0110] 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 conducive to improving the axial installation efficiency.

[0111] 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.

[0112] 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 direction to avoid the guide jam.

[0113] 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. It can also be constructed as other types of surfaces, such as a multi-section bent prismatic surface, etc. The setting method is flexible and optional.

[0114] In some embodiments, the guide groove 22 and the first positioning protrusion 21 are respectively provided on the outer peripheral wall of the 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 yoke transition piece 2 .

[0115] 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. As shown in Figures 3 and 4, the guide groove 22 and the first positioning protrusion 21 are respectively provided 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 provided simultaneously on the outer peripheral wall of the yoke transition piece 2, and the guide groove 22 and the first positioning protrusion 21 can be spaced apart and distributed 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 guide structure and the positioning structure separately. Positioning and matching are achieved during the guiding process, which is conducive to improving installation efficiency and ensuring installation accuracy.

[0116] 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 tooth yoke transition piece 2 to achieve an staggered distribution of guiding and positioning cooperation with the stator tooth portion 1 in the circumferential direction of the tooth yoke transition piece 2, so that the guiding and positioning of the stator tooth portion 1 and the tooth yoke transition piece 2 are more balanced.

[0117] Specifically, as shown in Figures 3 and 4, there are three guide grooves 22, and there are also 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 wall of the tooth 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 set according to actual guiding and positioning requirements.

[0118] 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. Thus, 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, enhance the motor thrust, and increase the motor operating efficiency.

[0119] In some embodiments, the stator tooth portion 1 is a multi-layer structure, and the radial projection of the tooth yoke transition piece 2 and the stator tooth portion 1 at least partially overlaps, that is, at least part of the tooth yoke transition piece 2 is located in the radial direction of the stator tooth portion 1. The tooth yoke transition piece 2 can be installed in the stator tooth portion 1 so that the tooth 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.

[0120] 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 part 1, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0121] In some embodiments, the tooth 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 tooth yoke transition piece 2 may be arranged 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.

[0122] In some embodiments, the axial extension of the yoke transition piece 2 is greater than or equal to the axial extension 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 members, and the yoke transition piece 2 can be coaxially arranged within the stator tooth portion 1, so that the yoke transition piece 2 can reduce the effect of the air gap on the magnetic resistance.

[0123] In some embodiments, the side surface of the tooth yoke transition piece 2 away from the stator yoke 3 is flush with the side surface of the stator tooth portion, and in the axial direction, the side surface of the tooth yoke transition piece 2 close to the stator yoke 3 is located between the stator tooth portion 1 and the stator yoke 3.

[0124] As shown in Figure 1, the upper surface of the tooth yoke transition piece 2 in Figure 1 is flush with the upper surface of the stator yoke 3. At the same time, as shown in Figure 2, the upper surface of the tooth yoke transition piece 2 in Figure 1 is located between the stator tooth portion 1 and the stator yoke 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator tooth portion 1 and the stator yoke 3, thereby reducing the magnetic resistance generated by the air gap and the space between the two.

[0125] In some embodiments, the yoke transition piece 2 is made of a magnetically conductive material so that it can guide magnetic field lines, reduce the effect of the air gap between the stator teeth 1 and the stator yoke 3 on the magnetic field lines, and reduce magnetic drag. The stator yoke 3 and the stator teeth 1 can be connected via the yoke transition piece 2. The yoke transition piece 2 is formed as an annular magnetically conductive material. In the axial direction of the stator core 100, the yoke transition piece 2 and the stator yoke 3 are stacked, and the yoke transition piece 2 and the center hole 11 are positioned and matched to achieve secure installation.

[0126] 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.

[0127] 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 both the yoke transition piece 2 and the stator tooth portion 1 can reduce eddy current loss and improve the operating efficiency of the motor.

[0128] In some embodiments, the stator tooth portion 1 includes a plurality of stacked first laminations 15. For example, the plurality of first laminations 15 are stacked axially along 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, which are stacked axially along the stator core 100 to form a single integral piece. The thicknesses of the plurality of first laminations 15 can be set to be the same, or at least two of the first laminations 15 can have different thicknesses. Adjacent first laminations 15 can be connected by bonding or other means to form the stator tooth portion 1 as a stable integral piece, and adjacent first laminations 15 will not separate from each other. Thus, forming the stator tooth portion 1 by axial lamination is beneficial for reducing eddy current losses in the stator tooth portion 1. Furthermore, the lamination stamping process is relatively mature, making the manufacturing process of the stator tooth portion 1 more feasible.

[0129] 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.

[0130] 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.

[0131] In some embodiments, the tooth 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 so that the two are relatively fixed in the axial direction, so that the stator yoke 3 will not detach axially from the tooth yoke transition piece 2.

[0132] 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 the 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.

[0133] 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, and ensuring the stability of the suspension motor.

[0134] 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.

[0135] The first plug-in portion can be provided on the end surface of one end of the gear yoke transition piece 2, while the second plug-in portion can be provided 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 axially, 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 aligned axially with each other in the stator core 100. Simultaneously, the first plug-in portion and the second plug-in portion are also aligned axially with each other in the stator core 100, thereby enabling plug-in installation of the two by axially approaching each other.

[0136] Therefore, after the first plug-in part and the second plug-in part are axially plugged in, the two can press against each other when they move relative to each other in the circumferential direction of the stator core 100, so as to limit the relative movement of the tooth yoke transition piece 2 and the stator yoke part 3 in the circumferential direction and avoid relative movement. Moreover, 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 part 3 is reduced, and the installation is more stable.

[0137] 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 provided 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 circumferentially of the gear yoke transition piece 2. Simultaneously, the second plug-in portion is a plurality of first plug-in grooves 31. The first plug-in grooves 31 are configured as recessed grooves in the end surface of the stator yoke 3, and the plurality of first plug-in grooves 31 are spaced apart and distributed circumferentially of the stator yoke 3.

[0138] Therefore, when the stator yoke 3 and the tooth yoke transition piece 2 are axially connected, the multiple first plug-in protrusions 23 and the multiple first plug-in grooves 31 can be plugged in and matched one by one, so that the stator yoke 3 and the tooth yoke transition piece 2 can be tightly plugged in at multiple positions in the circumferential direction, thereby improving the compactness of the connection between the two and preventing axial slippage.

[0139] Specifically, as shown in Figures 3 and 4 , nine first insertion protrusions 23 can be provided, and the nine first insertion 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 Figures 8 and 10 , nine first insertion grooves 31 are also provided, and the nine first insertion 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 nine first insertion protrusions 23 can be inserted into the nine first insertion grooves 31 in a one-to-one correspondence, achieving plug-in installation and greatly improving the assembly tightness between the stator yoke 3 and the gear yoke transition piece 2.

[0140] In some embodiments, as shown in Figures 5 and 6, 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 axial direction of the yoke transition piece 2 and does not penetrate in the radial direction. 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.

[0141] 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.

[0142] In some embodiments, as shown in Figures 5 and 6, there are multiple slits 24, and the 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.

[0143] As shown in FIG. 5 and FIG. 6 , the slits 24 may be distributed in groups in the circumferential direction of the yoke transition piece 2 , and each group includes a plurality of slits 24 .

[0144] Among them, the slit 24 can be set 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 spaced apart and distributed 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, reducing the difficulty of forming.

[0145] In other embodiments, as shown in Figures 1, 2 and 11, 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 be annular as a whole, so that the stator crown 4 can be integrally mounted outside the stator tooth portion 1, thereby reducing the assembly steps of the stator crown 4 and the stator tooth portion 1 and improving the assembly efficiency.

[0146] Furthermore, the stator crown 4 is constructed as a single piece, allowing for the provision of three separate wire slots 42. This eliminates the need for axial penetration of the stator crown 4, facilitating molding. Furthermore, the stator crown 4 is sleeved over the stator tooth portion 1, maintaining a relatively stable radial positional relationship between the stator crown 4 and the stator tooth portion 1. This prevents the stator crown 4 from radially disengaging from the stator crown 4 during threading, thereby improving structural stability.

[0147] That is to say, the stator crown 4 can be constructed as a split type (as shown in Figures 12 and 13) or as an integrated type (as shown in Figure 11), both of which can reduce magnetic resistance and improve magnetic lines of force. Specifically, as shown in Figure 20, the stator crown 4 adopts an integrated type, and as shown in Figure 21, the stator crown 4 adopts a split type. By comparing the magnetic lines of force of the split and integrated types, it can be seen that the integrated stator crown 4 can more effectively reduce the magnetic resistance than the split type, so that the magnetic lines of force are smoother when passing through the integrated stator crown 4, thereby effectively reducing the magnetic resistance and increasing the thrust and efficiency of the motor.

[0148] In some embodiments, as shown in FIG11 , a portion of the stator tooth crown 4 is bent inward to define a bent portion 43 having a wire passing groove 42 . As shown in FIG7 , a second positioning groove 14 is provided on the peripheral wall of the stator tooth portion 1 , and the bent portion 43 is located within 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 within the stator tooth portion 1 , thereby achieving circumferential limited matching of the stator tooth crown 4 and the stator tooth portion 1 . At the same time, the wire passing groove 42 on the bent portion 43 is used for threading.

[0149] Specifically, three bent portions 43 are provided on the inner peripheral wall of the stator tooth crown 4. At the same time, three second positioning grooves 14 are provided on the outer peripheral wall of the stator tooth portion 1, so that the three bent portions 43 extend into the three second positioning grooves 14 respectively for positioning and matching, thereby improving the compactness of the assembly of the two. At the same time, the winding of the stator winding 200 can also pass through or out of the wire grooves 42 of the three bent portions 43. The structure is simple, the installation is convenient, and it is conducive to the assembly of the entire motor.

[0150] In some embodiments, as shown in FIG12 , the stator tooth crown 4 includes an axial end face 44 and a circumferential side wall 45, with a transition chamfer (not shown) provided between the circumferential side wall 45 and at least one of the axial end faces 44. In other words, the stator tooth crown 4 includes two axial end faces 44 that face away from each other in the axial direction, and a circumferential inner side wall and a circumferential outer side wall that face away from each other in the radial direction. A transition chamfer may be provided at the junction of the circumferential outer side wall with one of the axial end faces 44, at the junction of the circumferential outer side wall with both axial end faces 44, or at the junction of the circumferential inner side wall with at least one of the axial end faces 44.

[0151] 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 under force, and reducing the risk of the corners of the stator tooth crown 4 cutting other objects, thereby improving the safety of the stator tooth crown 4.

[0152] The transition chamfer may be configured as a straight angle, an arc angle, or other types of chamfers.

[0153] This application also proposes another stator core 100 .

[0154] As shown in FIG. 1 , FIG. 2 , FIG. 14 and FIG. 15 , the stator core 100 according to an embodiment of the present application includes: a stator tooth portion 1 , a stator yoke portion 3 and a tooth yoke transition piece 2 .

[0155] 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.

[0156] 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 motor thrust and increasing the motor operating efficiency.

[0157] 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. Thus, 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, enhance the motor thrust, and increase the motor operating efficiency.

[0158] In some embodiments, the stator tooth portion 1 is a multi-layer structure, and the radial projection of the tooth yoke transition piece 2 and the stator tooth portion 1 at least partially overlaps, that is, at least part of the tooth yoke transition piece 2 is located in the radial direction of the stator tooth portion 1. The tooth yoke transition piece 2 can be installed in the stator tooth portion 1 so that the tooth 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.

[0159] 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 part 1, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0160] In some embodiments, the tooth 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 tooth yoke transition piece 2 may be arranged 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.

[0161] In some embodiments, the axial extension of the yoke transition piece 2 is greater than or equal to the axial extension 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 members, and the yoke transition piece 2 can be coaxially arranged within the stator tooth portion 1, so that the yoke transition piece 2 can reduce the effect of the air gap on the magnetic resistance at various axial positions of the stator tooth portion 1.

[0162] In some embodiments, the side surface of the tooth yoke transition piece 2 away from the stator yoke 3 is flush with the side surface of the stator tooth portion, and in the axial direction, the side surface of the tooth yoke transition piece 2 close to the stator yoke 3 is located between the stator tooth portion 1 and the stator yoke 3.

[0163] As shown in Figure 1, the upper surface of the tooth yoke transition piece 2 in Figure 1 is flush with the upper surface of the stator yoke 3. At the same time, as shown in Figure 2, the upper surface of the tooth yoke transition piece 2 in Figure 1 is located between the stator tooth portion 1 and the stator yoke 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator tooth portion 1 and the stator yoke 3, thereby reducing the magnetic resistance generated by the air gap and the space between the two.

[0164] In some embodiments, the yoke transition piece 2 is made of a magnetically conductive material so that it can guide magnetic field lines, reduce the effect of the air gap between the stator teeth 1 and the stator yoke 3 on the magnetic field lines, and reduce magnetic drag. The stator yoke 3 and the stator teeth 1 can be connected via the yoke transition piece 2. The yoke transition piece 2 is formed as an annular magnetically conductive material. In the axial direction of the stator core 100, the yoke transition piece 2 and the stator yoke 3 are stacked, and the yoke transition piece 2 and the center hole 11 are positioned and matched to achieve secure installation.

[0165] 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.

[0166] 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 both the yoke transition piece 2 and the stator tooth portion 1 can reduce eddy current loss and improve the operating efficiency of the motor.

[0167] In some embodiments, the stator tooth portion 1 includes a plurality of stacked first laminations 15. For example, the plurality of first laminations 15 are stacked axially along 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, which are stacked axially along the stator core 100 to form a single integral piece. The thicknesses of the plurality of first laminations 15 can be set to be the same, or at least two of the first laminations 15 can have different thicknesses. Adjacent first laminations 15 can be connected by bonding or other means to form the stator tooth portion 1 as a stable integral piece, and adjacent first laminations 15 will not separate from each other. Thus, forming the stator tooth portion 1 by axial lamination is beneficial for reducing eddy current losses in the stator tooth portion 1. Furthermore, the lamination stamping process is relatively mature, making the manufacturing process of the stator tooth portion 1 more feasible.

[0168] 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.

[0169] In some embodiments, the stator yoke 3 is formed as a wound part, that is, the stator yoke 3 is a multi-layer part formed by sequentially winding in the circumferential direction. Specifically, it can be formed by spirally winding a whole piece of silicon steel sheet around the axis, that is, as shown in Figure 9, one end of the stator yoke 3 is located on the inner side and the other end is located on the outer side. Among them, the stator yoke 3 can adopt a stamping winding process, and the winding head end 32 and the 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 the 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.

[0170] 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.

[0171] 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 axially of the stator yoke 3 on the magnetic field lines.

[0172] In some embodiments, the tooth 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 so that the two are relatively fixed in the axial direction, so that the stator yoke 3 will not detach axially from the tooth yoke transition piece 2.

[0173] 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 the 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.

[0174] 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, and ensuring the stability of the suspension motor.

[0175] Furthermore, the effects of the technical features of the present application and the prior art can be compared and analyzed in combination with Figures 17 to 19, wherein Figure 17 is a diagram showing the relationship between the magnetic resistance and time of the stator core in the prior art and the present application, Figure 18 is a diagram showing the relationship between the thrust and time of the levitation motor in the prior art and the present application, and Figure 19 is a simulation diagram of the magnetic lines of force corresponding to the two stator tooth crowns in the prior art and the present application.

[0176] The present application also proposes a stator assembly 1000 .

[0177] According to an embodiment of the present application, the stator assembly 1000 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 externally mounted on the stator yoke 3 .

[0178] As a result, the stator tooth portion 1 can support the stator winding 200, and the stator yoke portion 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 portion 3.

[0179] 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.

[0180] In particular, when the levitation motor is operating, the magnetic lines of force primarily extend radially within the stator tooth 1 and axially within the stator yoke 3. The axially stacked first laminations 15 of the stator tooth 1 can significantly reduce eddy current losses generated within the stator tooth 1. The circumferentially wound windings act equivalently to the axially stacked first laminations 15 to reduce eddy current losses in the stator tooth 1, significantly reducing eddy current losses in the stator yoke 3.

[0181] According to the stator assembly 1000 of the embodiment of the present application, its stator tooth portion 1 is composed of multiple first laminations 15 stacked in the axial direction 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 levitation motor.

[0182] In addition, 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 the air gap between the stator yoke 3 and the stator tooth portion 1 can also 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.

[0183] The application also proposes a stator assembly.

[0184] According to the stator assembly of the embodiment of the present application, it includes the stator assembly 1000 described in any of the above embodiments. There are multiple stator assemblies 1000, and the multiple stator assemblies 1000 are stacked in the axial direction. Power can be driven by the multiple stator assemblies 1000.

[0185] In the stator assembly, the stator teeth 1 are composed of a plurality of first laminations 15 stacked axially to reduce the eddy current loss of the stator teeth 1. The stator yoke 3 is formed as a winding or stacked member to reduce the eddy current loss of the stator yoke 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.

[0186] In addition, 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 the air gap formed between the stator yoke 3 and the stator tooth portion 1 can also 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.

[0187] In some embodiments, the stator assembly further includes a connecting rod, on which the stator cores of the multiple stator assemblies 1000 are mounted, thereby connecting the multiple stator assemblies 1000 together as a single unit. The stator cores 100 of the stator assemblies 1000 can form an interference fit with the connecting rod, facilitating the integrated installation of the stator assembly, reducing the number of installation steps, and improving installation efficiency. Furthermore, the multiple stator assemblies 1000 all possess a strong magnetic field, which helps improve the operating performance of the stator assembly.

[0188] In some embodiments, the connecting rod passes through the stator core 100, and the tooth 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 set to protrude from the inner circumferential wall of the tooth yoke transition piece 2, so that when the connecting rod is passed through the tooth 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.

[0189] The positioning boss can be constructed in an arc shape. At the same time, 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 fitting, thereby achieving circumferential fixation.

[0190] The present application also proposes a suspension motor.

[0191] According to an embodiment of the present application, the levitation motor includes: a stator assembly and a mover assembly, wherein the stator assembly is the stator assembly of any of the above-mentioned embodiments, and the mover assembly moves in conjunction with the stator assembly. That is, the levitation motor is a linear motor. According to an embodiment of the present application, the stator teeth 1 of the stator assembly are stacked axially by a plurality of first laminations 15 to reduce the eddy current loss of the stator teeth 1, and the stator yoke 3 is formed as a winding or stacked member to reduce the eddy current loss of the stator yoke 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 motor thrust and increasing the motor operating efficiency.

[0192] The present application also proposes a suspension system, comprising a suspension motor according to 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.

[0193] 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.

[0194] According to the suspension system of the embodiment of the present application, the stator tooth portion 1 of its stator assembly is composed of multiple 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, 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] The present application also provides a vehicle comprising the suspension system according to any one of the above embodiments.

[0196] According to the vehicle of the embodiment of the present application, the stator tooth portion 1 of its 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 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.

[0197] In the description of the present application, 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 application and simplifying the description, and do not indicate or imply that the device or element referred to 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 application.

[0198] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0199] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0200] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0201] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present application. 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0202] Although the embodiments of the present application 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 intent of the present application, and that the scope of the present application 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 an axial direction of the stator yoke, and at least a portion 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 portion 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 or 2, 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 portions 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 any one of claims 2 to 4, 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 wound part.

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

7. The stator core according to any one of claims 5 to 6, 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 center hole, and the stator core further comprises: A tooth yoke transition piece, to which both the stator tooth portion and the stator yoke portion are connected.

10. The stator core according to claim 9, characterized in that The gear yoke transition piece and the stator yoke 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 plugged into and matched 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 any one of claims 9 to 12, characterized in that: 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 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 into an arc-shaped surface, and the guide groove is formed into an arc-shaped groove.

15. The stator core according to claim 13 or 14, 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. There are multiple guide grooves and the first positioning protrusion respectively and they are staggered along the circumferential direction of the gear yoke transition piece.

16. The stator core according to any one of claims 9 to 15, characterized in that: In the axial direction of the stator core, a first plug-in portion is provided at the end of the tooth 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 any one of claims 9 to 17, 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 multiple slits, and the multiple 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 covered 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 configured to move in conjunction with the stator assembly.

22. A suspension system, characterized in that: It comprises the levitation motor according to claim 21, 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.

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

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