Axial flux motor, electric equipment and vehicle

Abstract

The invention discloses an axial magnetic flux motor, an electric device and a vehicle, the axial magnetic flux motor comprises a shell, a stator assembly, a rotor assembly and a partition plate assembly, the shell is used for forming a containing space, the stator assembly and the rotor assembly are arranged in the containing space in the axial direction of the axial magnetic flux motor, and the partition plate assembly comprises a partition plate body. The partition plate main body is arranged between the stator assembly and the rotor assembly, the shell is matched with the partition plate main body to form a cooling space for accommodating a coolant and the stator assembly, and the coolant in the cooling space is in direct contact with the stator assembly. According to the implementation mode, the partition plate body is arranged between the stator assembly and the rotor assembly, the internal space of the shell is reasonably utilized, and the structure of the axial magnetic flux motor can be more compact. The shell is matched with the partition plate body to form the cooling space, the coolant in the cooling space is in direct contact with the stator assembly, heat exchange between the coolant and the stator assembly can be efficiently achieved, and the cooling efficiency of the stator assembly is improved.

Description

Axial flux motor, electric device and vehicle Technical Field

[0001] The present application relates to the technical field of flux motors, and in particular to an axial flux motor, an electric device, and a vehicle. Background Art

[0002] Electric devices often use electric motors as a power source to perform their respective actions. For example, vehicles such as electric vehicles use electric motors such as induction motors and permanent magnet motors to propel the vehicle and capture braking energy when used as generators. Currently, two common types of electric motors include radial flux motors and axial flux motors. Compared to radial flux motors, axial flux motors are relatively lightweight, generate increased power, and have a compact size.

[0003] However, the axial flux motor has a high power density and generates a lot of heat when working. The existing method of cooling the axial flux motor is inefficient and cannot meet the heat dissipation requirements of the axial flux motor.

[0004] Summary of the Invention

[0005] The main purpose of this application is to provide an axial flux motor, an electric device and a vehicle, aiming to solve the above-mentioned technical problems existing in the prior art.

[0006] To address the aforementioned issues, the present application provides an axial flux motor comprising a housing, a stator assembly, a rotor assembly, and a partition assembly. The housing forms a housing space within which the stator assembly and rotor assembly are arranged axially along the motor's axis. The partition assembly comprises a partition body disposed between the stator assembly and the rotor assembly. The housing and the partition body cooperate to form a cooling space for accommodating coolant and the stator assembly. The coolant in the cooling space directly contacts the stator assembly. Thus, by disposing the partition body between the stator assembly and the rotor assembly, the internal space of the housing is rationally utilized, resulting in a more compact structure for the axial flux motor. The housing and the partition body cooperate to form a cooling space within which the coolant directly contacts the stator assembly, effectively enabling heat exchange between the coolant and the stator assembly and improving the cooling efficiency of the stator assembly.

[0007] In one embodiment, the housing includes an end plate portion, the inner end surface of which is disposed toward the side of the stator assembly facing away from the rotor assembly. The inner end surface of the end plate portion is spaced apart from the partition body along the axial direction, thereby defining two sides of the cooling space in the axial direction. Thus, by defining the boundaries of the cooling space through the end plate portion and the partition body, the utilization rate of the housing's accommodation space can be improved, making the entire axial flux motor structure more compact.

[0008] In one embodiment, the housing includes two cylindrical portions nested radially along the axial flux motor. Each of the two cylindrical portions seals against the partition body, and the cooling space is annular. This allows the stator assembly to be sealed within the cooling space with a relatively simple structure, reducing the risk of coolant leakage.

[0009] In one embodiment, the two cylindrical portions include a first cylindrical portion and a second cylindrical portion surrounding the first cylindrical portion. The first and second cylindrical portions extend toward the stator assembly, and the first cylindrical portion allows the rotor assembly's rotating shaft to pass through. The partition body includes an inner ring matching portion and an outer ring matching portion surrounding the inner ring matching portion. The inner ring matching portion seals with the first cylindrical portion, and the outer ring matching portion seals with the second cylindrical portion. This allows the stator assembly to be sealed within the annular cooling space using a relatively simple structure, reducing the risk of coolant leakage and minimizing interference with the rotor assembly.

[0010] In one embodiment, the baffle body is embedded within the second cylindrical portion, with the outer circumferential surface of the outer ring mating portion and the inner circumferential surface of the second cylindrical portion forming a sealed fit. Alternatively, the inner ring mating portion is provided with a third cylindrical portion that plugs into the first cylindrical portion and forms a sealed fit therebetween. Thus, the baffle body is positioned within the accommodating space, providing a cooling space while also providing effective protection for the baffle body. Furthermore, the plug-in fit between the third cylindrical portion and the first cylindrical portion achieves improved alignment and sealing.

[0011] In one embodiment, the third cylindrical portion is inserted into the periphery of the first cylindrical portion. The axial flux motor further includes a bearing disposed within the first cylindrical portion. The partition body includes an oil collecting plate, which cooperates with the first cylindrical portion to form an oil reservoir. This improves the lubrication continuity and stability of the bearing.

[0012] In one embodiment, the oil collecting plate is connected to the third cylindrical portion and extends radially toward the interior of the third cylindrical portion of the axial flux motor. This simplifies the assembly process of the oil collecting plate and enhances the structural strength of the partition body.

[0013] In one embodiment, the stator assembly includes a stator core and a coil wound around the stator core. The stator core is provided with a plurality of stator slots, and the coil is embedded in the plurality of stator slots. The partition body includes a plurality of embedded ribs corresponding to the positions of the plurality of stator slots, and each embedded rib is embedded in a corresponding stator slot. Thus, the embedded ribs are embedded in the stator slots, effectively securing the coil in the stator slot.

[0014] In one embodiment, the housing includes a first cylindrical portion and a second cylindrical portion disposed around the first cylindrical portion, the first cylindrical portion and the second cylindrical portion extending toward the stator assembly, the first cylindrical portion allowing the shaft portion of the rotor assembly to pass through, the partition body including an inner ring matching portion and an outer ring matching portion disposed around the inner ring matching portion, the inner ring matching portion sealingly mating with the first cylindrical portion, the outer ring matching portion sealingly mating with the second cylindrical portion, the plurality of stator slots and the plurality of embedded ribs radially extending relative to the axial direction, the plurality of embedded ribs being connected to the inner ring matching portion and / or the outer ring matching portion, respectively. Thus, the assembly process of the embedded ribs can be simplified, and the embedded ribs can be used to assist in fixing the inner ring matching portion and / or the outer ring matching portion, thereby improving structural stability.

[0015] In one embodiment, the partition body further comprises a blocking plate for blocking the gaps between the plurality of embedded ribs, thereby enhancing the sealing performance of the cooling space.

[0016] In one embodiment, the inner ring matching portion and / or the outer ring matching portion are in sealing cooperation with the stator assembly, thereby enhancing the sealing performance of the cooling space.

[0017] In one embodiment, the partition assembly includes a reinforcement member, which is cylindrical and supported on a side of the partition body facing away from the stator assembly, and the rotor assembly is disposed within the reinforcement member. Thus, the reinforcement member can improve the structural stability of the partition body.

[0018] In one embodiment, the reinforcement member is configured to abut against the shell, thereby improving the structural stability of the partition body through the reinforcement member.

[0019] In one embodiment, the partition assembly is provided with a plurality of pressure relief holes arranged at intervals along the circumference of the axial flux motor, thereby balancing the pressure fluctuations caused by the rotor assembly during operation through the pressure relief holes.

[0020] In one embodiment, the rotor assembly and the partition body are spaced apart in the axial direction to form an air gap, and the pressure relief hole is used to connect the air gap with the space outside the partition assembly. Thus, the pressure relief hole can be used to balance the air pressure fluctuations in the air gap caused by the rotor assembly during operation.

[0021] In one embodiment, the baffle assembly is further provided with a return hole, through which coolant that has penetrated from the cooling space into the baffle assembly is discharged to the space outside the baffle assembly. This can alleviate the adverse effects of coolant leakage in the cooling space on the axial flux motor.

[0022] In one embodiment, the partition assembly includes a reinforcement member, which is cylindrical and supported on the side of the partition body facing away from the stator assembly. The rotor assembly is disposed within the reinforcement member, and the return hole is provided on the reinforcement member. This can mitigate the adverse effects of coolant leakage within the cooling space on the rotor assembly.

[0023] In one embodiment, the reinforcement member is further provided with a plurality of pressure relief holes, which are spaced apart along the circumference of the axial flux motor at the edge of the reinforcement member facing the partition body, and the return holes are centrally located relative to both side edges of the reinforcement member along the axial direction. This improves the pressure relief effect of the pressure relief holes and the return flow effect of the return holes.

[0024] In one embodiment, the stator assembly includes a stator core and coils wound around the stator core. The stator core is annular, and the coils protrude from opposite annular surfaces of the stator core in the radial direction of the axial flux motor to form an inner coil portion and an outer coil portion. The inner coil portion and / or the outer coil portion are located within the cooling space, and coolant within the cooling space directly contacts the inner coil portion and / or the outer coil portion. This improves the cooling efficiency of the stator assembly.

[0025] In one embodiment, the housing includes an end plate portion, the inner end surface of which faces the stator assembly away from the rotor assembly. Cooling channels are provided on the inner end surface of the end plate portion, on the side of the partition body facing the end plate portion, and / or on the stator assembly. Coolant in the cooling space flows along the cooling channels. This improves the cooling efficiency of the stator assembly.

[0026] In one embodiment, the housing includes an end plate portion, the inner end surface of which is disposed toward the side of the stator assembly facing away from the rotor assembly. A cooling channel for the coolant is disposed on the inner end surface. The stator assembly cover is disposed over at least a portion of the cooling channel to allow the coolant flowing in the cooling channel to directly contact the stator assembly. Thus, by allowing the coolant in the cooling channel to directly contact the stator assembly, efficient heat exchange between the coolant and the stator assembly can be achieved, thereby improving the cooling efficiency of the stator assembly.

[0027] In one embodiment, the stator assembly includes a stator flange and a stator core. The stator flange includes a disc-shaped body. The stator core is attached to a main surface of the disc-shaped body facing away from the end plate. The disc-shaped body covers at least a portion of the cooling channel. Coolant flowing in the cooling channel directly contacts the disc-shaped body. Thus, the stator flange is used to secure the stator core and serves as a foundation for mating with the housing, thereby reducing assembly difficulty.

[0028] In one embodiment, the stator assembly further includes a coil wound around the stator core, wherein the stator core and the disc-shaped body are arranged in an annular shape, and the coil protrudes from opposite annular surfaces of the stator core in the radial direction of the axial flux motor to form an inner ring coil portion and an outer ring coil portion. At least one of the inner ring coil portion and the outer ring coil portion is arranged to extend beyond the disc-shaped body in the radial direction of the axial flux motor or to maintain a predetermined gap with the disc-shaped body in the axial direction of the axial flux motor, and the coolant is in direct contact with at least one of the inner ring coil portion and the outer ring coil portion. This facilitates direct contact between the coolant and the inner ring coil portion and / or the outer ring coil portion through the predetermined gap, thereby improving the cooling efficiency of the stator assembly.

[0029] In one embodiment, the cooling channels include at least two circumferential channels and at least one radial channel. The at least two circumferential channels are spaced apart in the radial direction of the axial flux motor, and the radial channel is disposed in the radial direction of the axial flux motor and communicates with the at least two circumferential channels. This allows for a wider contact area between the coolant and the stator assembly, further improving the cooling efficiency of the stator assembly.

[0030] In one embodiment, the stator assembly includes a first stator assembly and a second stator assembly spaced apart along the axial direction, the rotor assembly being located between the first and second stator assemblies, and the partition body including a first partition body and a second partition body. The first partition body cooperates with the housing to form a first cooling space for accommodating the coolant and the first stator assembly, while the second partition body cooperates with the housing to form a second cooling space for accommodating the coolant and the second stator assembly. Thus, the two stator assemblies improve the stability and output efficiency of the axial flux motor, and the coolant simultaneously contacts both stator assemblies, thereby improving the cooling efficiency of the axial flux motor.

[0031] In one embodiment, the partition assembly is provided with a communication channel for connecting the first cooling space and the second cooling space. Thus, by connecting the first cooling space and the second cooling space through the communication channel, coolant can flow between the first cooling space and the second cooling space, simplifying the coolant circulation method.

[0032] In one embodiment, the communication channel includes a first communication channel and a second communication channel, and the first communication channel and the second communication channel are arranged opposite to each other along the radial direction, thereby improving the consistency of the cooling effects of the two cooling spaces.

[0033] In one embodiment, the housing includes a first end plate portion and a second end plate portion spaced apart along the axial direction. The stator assembly and the rotor assembly are arranged axially between the first and second end plates. One of the first and second end plates is provided with a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are respectively arranged opposite the first and second connecting channels along the axial direction of the axial flux motor. This improves the consistency of the cooling effect of the two cooling spaces.

[0034] In one embodiment, the partition assembly further includes a reinforcement member and a channel member connected between the first and second partition bodies. The reinforcement member is cylindrical, the rotor assembly is disposed within the reinforcement member, the channel member is disposed outside the reinforcement member, and the communication channel is disposed on the channel member. This improves the structural stability of the first and second partition bodies, while reducing interference with the rotor assembly caused by the communication channel and mitigating adverse effects on the rotor assembly caused by coolant leakage within the communication channel.

[0035] In one embodiment, the housing includes a first cylindrical portion, within which the rotor assembly's shaft portion is rotatably supported, and the first cylindrical portion at least partially overlaps the stator assembly along the axial direction. This reduces the axial dimension of the axial flux motor, making the entire axial flux motor more compact.

[0036] In one embodiment, the stator assembly and / or the rotor assembly includes a flange and an iron core. The flange comprises a disc-shaped body having a plurality of through-grooves connecting the two main surfaces of the disc-shaped body. The iron core is provided with a plurality of protrusions corresponding to the through-grooves, the protrusions being inserted into the corresponding through-grooves. The disc-shaped body and the iron core are welded and fixed to each other along the mating edges of the through-grooves and the protrusions. This reduces the difficulty of machining and assembling the iron core of the stator assembly and / or the rotor assembly, and reduces electromagnetic losses in the iron core.

[0037] In one embodiment, the rotor assembly includes a rotor core, a magnetic block, and a stopper. The rotor core is provided with a rotor slot having an open end located on the outer circumference of the rotor core. The magnetic block is disposed within the rotor slot. The stopper is located radially outward of the rotor core and axially blocks the open end. Thus, the stopper confines the magnetic block within the rotor slot, mitigating the risk of the magnetic block falling out of the rotor slot and improving the rotor assembly's maximum speed capability.

[0038] In one embodiment, the stopper is an annular structure that surrounds the rotor core along the circumference of the rotor assembly. The rotor assembly further includes a rotor flange, which includes a disc-shaped body. The rotor core is affixed to one major surface of the disc-shaped body. The stopper is provided separately from the rotor flange or is affixed to the disc-shaped body. Thus, providing the stopper separately from the rotor flange simplifies the machining of the rotor flange, while affixing the stopper to the disc-shaped body improves the structural stability of the stopper and enhances the stopping effect.

[0039] In one embodiment, the rotor assembly includes a first rotor assembly and a second rotor assembly. The first rotor assembly includes a first rotor flange and a first rotor core. The first rotor flange includes a first disc-shaped body and a rotating shaft portion disposed on the first disc-shaped body. The first rotor core is disposed on one main surface of the first disc-shaped body and surrounds the rotating shaft portion. The second rotor assembly includes a second rotor flange and a second rotor core. The second rotor flange includes a second disc-shaped body and an axial hole portion disposed on the second disc-shaped body. The second rotor core is disposed on one main surface of the second disc-shaped body. The axial hole portion defines an axial hole, and the rotating shaft portion is inserted into the axial hole along the axial direction of the rotor assembly. The main surface of the first disc-shaped body facing away from the first rotor core and the main surface of the second disc-shaped body facing away from the second rotor core are in contact with each other and fixed relative to each other. This reduces the difficulty of assembling the two rotor assemblies.

[0040] In one embodiment, one of the first disc-shaped body and the second disc-shaped body is welded and fixed to the other of the first disc-shaped body and the second disc-shaped body along its outer circumference, thereby simplifying the fixing method of the two rotor assemblies and improving the fixing effect.

[0041] In one embodiment, at an end of the axial hole portion facing away from the first disc-shaped body, the rotating shaft portion and the axial hole portion are welded and fixed to each other along the edge of the axial hole; or the rotating shaft portion includes an insertion portion and a docking portion, the insertion portion being inserted into the axial hole, the docking portion being arranged to overlap the axial hole portion in its projection along the axial direction of the rotor assembly, and the docking portion and the axial hole portion being provided with multiple sets of fixed matching pairs, the docking portions and the axial hole portion being fixed relative to each other by the fixed matching pairs. This simplifies the fixing method of the two rotor assemblies and improves the fixing effect.

[0042] In order to solve the above problems, the present application provides an electric device, which includes the axial flux motor described in any one of the above.

[0043] In order to solve the above problems, the present application provides a vehicle, which includes the axial flux motor described in any one of the above.

[0044] Compared to the prior art, the axial flux motor of the present application includes a housing, a stator assembly, a rotor assembly, and a partition assembly. The housing is used to form a storage space, within which the stator assembly and rotor assembly are arranged axially along the axial direction of the axial flux motor. The partition assembly includes a partition body disposed between the stator assembly and the rotor assembly. The housing and the partition body cooperate to form a cooling space for accommodating coolant and the stator assembly. The coolant in the cooling space directly contacts the stator assembly. Through the above-described embodiment, the partition body is disposed between the stator assembly and the rotor assembly, making rational use of the internal space of the housing and making the structure of the axial flux motor more compact. The housing and the partition body cooperate to form a cooling space for accommodating coolant and the stator assembly. The coolant therein directly contacts the stator assembly, enabling efficient heat exchange between the coolant and the stator assembly and improving the cooling efficiency of the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] FIG1 is a disassembled schematic diagram of a first embodiment of an axial flux motor provided by the present application;

[0047] FIG2 is a cross-sectional schematic diagram of a first embodiment of an axial flux motor provided by the present application;

[0048] FIG3 is a schematic structural diagram of an embodiment of a housing provided by the present application;

[0049] FIG4 is a schematic plan view of the housing shown in FIG3 ;

[0050] FIG5 is a cross-sectional schematic diagram of a first embodiment of a partition assembly provided by the present application;

[0051] FIG6 is a schematic structural diagram of an embodiment of a stator assembly provided in the present application;

[0052] FIG7 is a schematic structural diagram of a second embodiment of a partition assembly provided by the present application;

[0053] FIG8 is a cross-sectional schematic diagram of a second embodiment of a partition assembly provided by the present application;

[0054] FIG9 is a cross-sectional schematic diagram of a second embodiment of the axial flux motor provided by the present application without a rotor assembly;

[0055] FIG10 is a disassembled schematic diagram of a second embodiment of an axial flux motor provided by the present application;

[0056] FIG11 is a cross-sectional schematic diagram of a second embodiment of an axial flux motor provided by the present application;

[0057] FIG12 is a disassembled schematic diagram of the first embodiment of the diaphragm assembly of the second embodiment of the axial flux motor provided by the present application;

[0058] FIG13 is a disassembled schematic diagram of a second embodiment of a partition assembly of the second embodiment of the axial flux motor provided by the present application;

[0059] FIG14 is a disassembled schematic diagram of a third embodiment of the partition assembly of the second embodiment of the axial flux motor provided by the present application;

[0060] FIG15 is a schematic structural diagram of a first embodiment of a stator assembly provided in the present application;

[0061] FIG16 is a disassembled schematic diagram of the first embodiment of the stator assembly provided in the present application;

[0062] FIG17 is a schematic structural diagram of an embodiment of a stator flange provided in the present application;

[0063] FIG18 is a schematic structural diagram of an embodiment of a stator core provided by the present application;

[0064] FIG19 is a schematic cross-sectional view of the stator core shown in FIG15 ;

[0065] FIG20 is a structural schematic diagram and a cross-sectional schematic diagram of a second embodiment of a stator assembly provided by the present application;

[0066] FIG21 is a disassembled schematic diagram of a second embodiment of a stator assembly provided by the present application;

[0067] FIG22 is a structural schematic diagram and a cross-sectional schematic diagram of a third embodiment of a stator assembly provided in the present application;

[0068] FIG23 is a schematic structural diagram of an embodiment of a stator flange in the third embodiment of the stator assembly provided by the present application;

[0069] FIG24 is a schematic structural diagram of another embodiment of the stator flange in the third embodiment of the stator assembly provided by the present application;

[0070] FIG25 is a structural schematic diagram and a cross-sectional schematic diagram of the first embodiment of the rotor assembly provided by the present application;

[0071] FIG26 is an enlarged schematic diagram within the dotted box in FIG25 ;

[0072] FIG27 is a disassembled schematic diagram of the first embodiment of the rotor assembly provided by the present application;

[0073] FIG28 is a schematic structural diagram of an embodiment of a rotor core provided by the present application;

[0074] FIG29 is a structural schematic diagram and a cross-sectional schematic diagram of a second embodiment of a rotor assembly provided by the present application;

[0075] FIG30 is a disassembled schematic diagram of an embodiment of the first rotor component in the second embodiment of the rotor assembly provided by the present application;

[0076] FIG31 is a disassembled schematic diagram of an embodiment of the second rotor component in the second embodiment of the rotor assembly provided by the present application;

[0077] FIG32 is a structural schematic diagram and a cross-sectional schematic diagram of a third embodiment of a rotor assembly provided by the present application;

[0078] FIG33 is a disassembled schematic diagram of the third embodiment of the rotor assembly provided in the present application;

[0079] FIG34 is a structural schematic diagram and a cross-sectional schematic diagram of a fourth embodiment of a rotor assembly provided by the present application;

[0080] FIG35 is a disassembled schematic diagram of the fourth embodiment of the rotor assembly provided in the present application.

[0081] Reference numerals: axial flux motor 1; axial direction X; radial direction Y; circumferential direction Z;

[0082] Housing 10; accommodating space 11; end plate 12; inner end surface 121; first end plate 12a; second end plate 12b; first inner end surface 121a; second inner end surface 121b; cooling channel 122; circumferential channel 1221; radial channel 1222; first radial channel 12221; second radial channel 12222; mounting blind hole 123; outer end surface 124; columnar portion 1241; liquid inlet 13; liquid outlet 14; first cylindrical portion 15; second cylindrical portion 16; annular rib 17; first cooling channel 122a; second cooling channel 122b; first stator assembly 20a; second stator assembly 20b;

[0083] Stator assembly 20; stator core 21; outer ring coil portion 211; inner ring coil portion 212; stator slot 213; open slot 2131; stator flange 22; disc-shaped body 221; stepped hole 2211; first hole section 22111; second hole section 22112; center portion 2212; annular edge portion 2213; raised portion 222; through-slot 223; through-slot group 2231; raised portion 2221; fixing member 23; stepped hole 24; first hole section 241; second hole section 242; third hole section 243; fixing post 25; internal threaded hole 251; fixing post group 252;

[0084] Rotor assembly 30; rotor core 31; rotor slot 311; protrusion 312; protrusion 3121; second through-slot 3122; magnetic block 32; stopper 33; rotor flange 34; disc-shaped body 341; first through-slot 342; first rotor assembly 30a; first rotor core 31a; first rotor slot 311a; first magnetic block 32a; first rotor flange 34a; first disc-shaped body 341a; shaft portion 35a; first annular table 351a; insertion portion 352a; docking portion 353a; first a fixing hole 354a; a first outer hole section 3541a; a first inner hole section 3542a; a second rotor assembly 30b; a second rotor core 31b; a second rotor slot 311b; a second magnetic block 32b; a second rotor flange 34b; a second disc-shaped body 341b; an axial hole portion 35b; an axial hole 351b; a second annular table 352b; a second fixing hole 353b; a second outer hole section 3531b; a second inner hole section 3532b; a fixing pair 36; a fixing member 37; a positioning pin 38; and an annular stopper 39.

[0085] Partition assembly 40; cooling space 41; partition body 42; inner ring matching portion 421; outer ring matching portion 422; third cylindrical portion 423; oil collecting plate 424; oil storage tank 4241; reinforcement 425; pressure relief hole 4251; return hole 4252; embedded rib 426; sealing plate 427; first partition body 42a; second partition body 42b; first cooling space 41a; second cooling space 41b; first connecting channel 431; second connecting channel 432; channel member 440. DETAILED DESCRIPTION

[0086] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0087] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0088] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0089] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0090] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0091] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0092] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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 cannot be understood as a limitation on the embodiments of the present application.

[0093] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0094] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0095] In one of the embodiments provided in the present application, the axial flux motor disclosed in the present application can be used in electric devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements. The electric devices may be, but are not limited to, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys may include mobile electric toys, for example, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like. The electric device not only needs to convert electrical energy into kinetic energy to replace or partially replace fuel or natural gas to provide driving power, but also needs an electric motor (i.e., motor) to generate torque to convert electrical energy into mechanical energy.

[0096] In another embodiment provided herein, the axial flux motor provided herein may also be applied to vehicles, which may include but are not limited to battery vehicles, fuel vehicles, gas vehicles, new energy vehicles, electric vehicles, ships, spacecraft, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc. Taking electric vehicles as an example, electric vehicles not only need to convert electrical energy into kinetic energy to replace or partially replace fuel or natural gas to provide driving power for the vehicle, but also need electric motors (i.e., motors) to generate torque to convert electrical energy into mechanical energy.

[0097] Taking the example of electric vehicles where both the vehicle and the electric device are electric vehicles, electric vehicles (including hybrid vehicles) use electric motors such as induction motors and permanent magnet motors to drive the vehicle and capture braking energy when used as generators. Generally, an electric motor includes a rotor that rotates during operation and a stationary stator. Currently, two common types of motors include radial flux motors and axial flux motors. Among them, in radial flux motors, the rotor and stator are usually located in a concentric or nested structure, and when the stator is energized, it generates a magnetic flux that extends radially from the stator to the rotor. The conductive windings in the stator are usually arranged perpendicular to the axis of rotation, thereby generating a magnetic field that is oriented in a radial direction from the axis of rotation (along the rotor axis). In axial flux motors, a magnetic field parallel to the axis of rotation is generated by the conductive wire windings in the stator, so the magnetic flux extends parallel to the axis of rotation (parallel to the rotor axis). In some applications, axial flux motors are ideal because they are relatively light, generate increased power, and have compact dimensions compared to radial flux motors. Therefore, in applications with size and weight restrictions, such as electric vehicle drive motors, axial flux motors have obvious application advantages over radial flux motors at the same speed.

[0098] The axial flux motor has a high power density and generates a lot of heat when working. The current heat dissipation method includes setting water channels on the outside of the axial flux motor to indirectly cool the stator and rotor. However, the outer water channel design has low cooling efficiency for the stator and rotor. At the same time, the stator is only cooled by indirect cooling, and the inner and outer coils of the stator cannot be fully cooled. At the same time, the outer water channel design also requires the installation of additional external covers and fastening, etc., and the integration is low.

[0099] In order to solve the technical problems existing in the axial flux motor of the prior art and enable the coolant to directly cool the stator and / or rotor, the present application provides an axial flux motor, referring to Figures 1 and 2. Figure 1 is a disassembly schematic diagram of the first embodiment of the axial flux motor provided by the present application, and Figure 2 is a cross-sectional schematic diagram of the first embodiment of the axial flux motor provided by the present application.

[0100] The axial flux motor 1 includes a housing 10, a stator assembly 20, and a rotor assembly 30. The housing 10 is used to form a housing space 11. The stator assembly 20 and the rotor assembly 30 are arranged in the housing space 11 along the axial direction X of the axial flux motor 1. The housing 10 can be formed by assembling two hollow shells to form the housing space 11 within the housing 10. The stator assembly 20 and the rotor assembly 30 are located in the housing space 11, and the housing 10 provides good protection for the stator assembly 20 and the rotor assembly 30.

[0101] In some feasible embodiments provided herein, the housing 10 may include an end plate 12, with an inner end surface 121 of the end plate 12 disposed toward the side of the stator assembly 20 away from the rotor assembly 30. The accommodating space 11 may be cylindrical, with the inner end surface 121 being the end surface forming one side of the accommodating space 11. During operation, the rotor assembly 30 rotates about a predetermined central axis, the direction of extension of which can be identified as the axial direction X of the axial flux motor 1. The stator assembly 20 and the rotor assembly 30 are arranged within the accommodating space 11 along the axial direction X of the axial flux motor 1. Specifically, the end plate 12, the stator assembly 20, and the rotor assembly 30 are arranged sequentially along the axial direction X. By rationally utilizing the internal space of the housing 10, the structure of the axial flux motor 1 can be made more compact. Furthermore, the radial direction Y of the axial flux motor 1 described below is perpendicular to the axial direction X, and the circumferential direction Z of the axial flux motor 1 is the direction circumferential to the axial direction X. In addition, the axial, radial, and circumferential directions of the stator assembly 20 and the rotor assembly 30 described below are all defined with reference to the directions X, Y, and Z.

[0102] A cooling channel 122 is provided on the inner end surface 121 of the end plate portion 12. The cooling channel 122 is configured so that the coolant flowing in the cooling channel 122 directly contacts the stator assembly 20. The coolant is a fluid that can flow in the cooling channel 122. For example, the coolant can be cooling oil or water. During the operation of the axial flux motor 1, the temperature of the stator assembly 20 and the rotor assembly 30 will gradually increase. In order to ensure that the working efficiency of the axial flux motor 1 is not affected, the stator assembly 20 and the rotor assembly 30 need to be quickly cooled. In this embodiment, a cooling channel 122 is provided on the inner end surface 121, and the coolant in the cooling channel 122 directly contacts the stator assembly 20, which can efficiently realize heat exchange between the coolant and the stator assembly 20, thereby improving the cooling efficiency of the stator assembly 20.

[0103] 3 and 4 , FIG3 is a schematic structural diagram of an embodiment of a housing provided in the present application; FIG4 is a schematic plan view of the housing shown in FIG3 .

[0104] The cooling channels 122 include at least two circumferential channels 1221, spaced apart along the radial direction Y of the axial flux motor 1. The cooling channels 122 guide the flow of coolant, allowing the coolant flowing within the channels to directly contact the stator assembly 20 while rapidly removing heat. In this embodiment, the cooling channels 122 are configured to include at least two circumferential channels 1221, thereby increasing the contact area between the coolant and the stator assembly 20. Furthermore, the coolant flows regularly along the circumferential channels 1221 in a predetermined direction, further improving the cooling efficiency of the stator assembly 20.

[0105] Furthermore, the cooling channel 122 also includes a radial channel 1222 arranged along the radial direction Y of the axial flux motor 1. The radial channel 1222 is connected to at least two circumferential channels 1221 so that the coolant can flow between the radial channel 1222 and the circumferential channel 1221 at the same time. The radial channel 1222 is extended along the radial direction Y of the axial flux motor 1, so that the coolant in the radial channel 1222 can be quickly distributed to each circumferential channel 1221, or the coolant flowing out of each circumferential channel 1221 can be merged, thereby improving the cooling efficiency of the stator assembly 20.

[0106] Furthermore, the radial flow channel 1222 includes a first radial flow channel 12221 and a second radial flow channel 12222, wherein the first radial flow channel 12221 is used to distribute coolant to each circumferential flow channel 1221, and the second radial flow channel 12222 is used to converge the coolant flowing out of each circumferential flow channel 1221. The first radial flow channel 12221 and the second radial flow channel 12222 can be arranged on the inner end surface 121 at intervals along the circumferential direction Z of the axial flux motor 1, so that the first radial flow channel 12221 and the second radial flow channel 12222 can respectively connect to the circumferential flow channel 1221 at different positions on the inner end surface 121. The first radial flow channel 12221 is configured to receive coolant and allow the coolant to flow in along the direction in which the first radial flow channel 12221 extends. During the coolant inflow process, the coolant will sequentially flow into the circumferential flow channel 1221 at different radial positions and flow along the direction in which the circumferential flow channel 1221 extends, thereby completing heat exchange with the stator assembly 20. After the coolant completes heat exchange with the stator assembly 20, the coolant flowing along the circumferential flow channel 1221 will further flow into the second radial flow channel 12222 and converge along the second radial flow channel 12222. The coolant flowing through the converging second radial flow channel 12222 can further flow out of the housing 10 and, after heat exchange with an external heat exchange element, recirculate back to the first radial flow channel 12221, thereby improving the cooling efficiency of the stator assembly 20.

[0107] To facilitate the drainage of the coolant after heat exchange out of the housing 10 and the flow of the coolant that has not undergone heat exchange into the housing 10, a liquid inlet 13 and a liquid outlet 14 may be provided on the housing 10. Specifically, the first radial flow channel 12221 and the second radial flow channel 12222 are arranged opposite each other along the radial direction Y. The housing 10 is also provided with a liquid inlet 13 and a liquid outlet 14. The liquid inlet 13 is used to connect the first radial flow channel 12221 with the exterior of the housing 10, and the liquid outlet 14 is used to connect the second radial flow channel 12222 with the exterior of the housing 10. As shown in Figures 3 and 4, the liquid inlet 13 may be located at the end of the first radial flow channel 12221 away from the center of the inner end surface 121, and the liquid outlet 14 may be located at the end of the second radial flow channel 12222 away from the center of the inner end surface 121. The coolant enters the housing 10 from the liquid inlet 13 and, when flowing in the first radial flow channel 12221, is first distributed to the circumferential flow channel 1221 with the largest diameter, and then sequentially distributed to each circumferential flow channel 1221 with gradually smaller diameters. Although the path of the circumferential flow channel 1221 with a relatively large diameter is relatively long, the coolant pressure is also relatively high. Therefore, the above-mentioned method can minimize the time difference between the coolant in different circumferential flow channels 1221 flowing to the second radial flow channel 12222, thereby efficiently and comprehensively cooling the stator assembly 20. Similarly, the liquid outlet 14 can be located at the end of the second radial flow channel 12222 away from the center of the inner end surface 121, so that the two ends of the circumferential flow channel 1221 with a relatively large diameter have a large pressure difference, thereby minimizing the time difference between the coolant in different circumferential flow channels 1221 flowing to the second radial flow channel 12222.

[0108] In one embodiment, the inner end surface 121 is provided with a first cylindrical portion 15 and at least two annular ribs 17 surrounding the first cylindrical portion 15. The first cylindrical portion 15 can be used to accommodate a bearing. The annular ribs 17 and the first cylindrical portion 15 can be integrally formed with the inner end surface 121. Both the first cylindrical portion 15 and the annular ribs 17 protrude from the inner end surface 121, thereby forming a cooling flow channel 122 on the inner end surface 121. Specifically, the at least two annular ribs 17 are spaced apart from the first cylindrical portion 15 along the radial direction Y, and are spaced apart from each other along the radial direction Y, thereby forming a circumferential flow channel 1221 between the first cylindrical portion 15 and adjacent annular ribs 17, and between two adjacent annular ribs 17. The annular ribs 17 and the first cylindrical portion 15 are used to guide the coolant flow within the circumferential flow channel 1221. The width of the outermost annular rib 17 can be greater than that of the other annular ribs 17 to enhance the structural strength of the inner end surface 121 and facilitate the assembly of the housing 10 with other structures using the outermost annular rib 17. At least some of the annular ribs 17 are provided with notches, thereby forming the radial flow channel 1222. By utilizing the coordination between the first cylindrical portion 15, the annular ribs 17, and the notches, the machining difficulty of the cooling channel is reduced.

[0109] 1 to 4 , a mounting blind hole 123 is further provided on the inner end surface 121, and the stator assembly 20 is fixed to the end plate portion 12 by means of a fixing piece inserted into the mounting blind hole 123. At this time, the opening of the mounting blind hole 123 faces the stator assembly 20, and the fixing piece is inserted into the mounting blind hole 123 from the inside of the housing 10. In this way, the risk of coolant leakage can be effectively reduced. Optionally, the number of mounting blind holes 123 can be multiple, and the multiple mounting blind holes 123 are arranged at intervals along the circumferential Z direction of the axial flux motor 1. The multiple mounting blind holes 123 can be located at the edge of the end plate portion 12. Correspondingly, the number of fixing pieces can be in a one-to-one correspondence with the number of mounting blind holes 123, so as to improve the stability of the installation of the housing 10 and the stator assembly 20.

[0110] Furthermore, the end plate portion 12 further includes an outer end surface 124 disposed opposite the inner end surface 121. A columnar portion 1241 protrudes from the outer end surface 124, and the blind mounting hole 123 extends into the columnar portion 1241. The outer end surface 124 is located outside the accommodating space 11, and the columnar portion 1241 can correspond to the position of the blind mounting hole 123. The blind mounting hole 123 extends into the columnar portion 1241, which can increase the depth of the blind mounting hole 123. When a fixing member is inserted into the blind mounting hole 123, the fixing member can be simultaneously fixed by the end plate portion 12 and the columnar portion 1241, further improving the stability of the installation of the housing 10 and the stator assembly 20.

[0111] Optionally, the mounting blind hole 123 is provided on the outermost annular rib 17 of the at least two annular ribs 17. In this case, the mounting blind hole 123 is located at the edge of the end plate 12, and when the fixing member is inserted into the mounting blind hole 123 to achieve fixation, it will not affect the direct contact between the coolant in the cooling channel 122 and the stator assembly 20.

[0112] Optionally, the width of the outermost annular rib 17 along the radial direction Y is greater than the widths of the remaining annular ribs 17 along the radial direction Y. By increasing the width of the outermost annular rib 17, the structural strength of the inner end surface 121 can be enhanced, thereby facilitating the formation of the mounting blind hole 123 on the outermost annular rib 17 and facilitating the assembly of the housing 10 and the stator assembly 20 using the outermost annular rib 17.

[0113] In one embodiment, the stator assembly 20 includes a stator core 21 and a coil. The coil is wound around the stator core 21, which is annular in shape. The coil protrudes from opposite sides of the stator core 21 along the radial direction Y of the axial flux motor 1, forming an inner coil portion 212 and an outer coil portion 211. Specifically, a portion of the coil may protrude from the inner surface of the stator core 21, forming the inner coil portion 212, and a portion may protrude from the outer surface of the stator core 21, forming the outer coil portion 211. Coolant flowing within the cooling channel 122, or coolant flowing into or out of the cooling channel 122, directly contacts at least one of the inner coil portion 212 and the outer coil portion 211. Because the coil protrudes from the stator core 21 to form an outer coil portion 211 and an inner coil portion 212, when the coolant flows in the cooling channel 122, the coolant can directly contact not only the stator core 21, but also the outer coil portion 211 and / or the inner coil portion 212. This improves the cooling efficiency of the stator assembly 20. Furthermore, the coolant in the cooling channel 122 can directly contact the stator core 21, while the coolant flowing into or out of the cooling channel 122 can directly contact the outer coil portion 211 and / or the inner coil portion 212.

[0114] In one embodiment, the stator assembly 20 includes a stator flange 22. The stator core 21 is attached and fixed to one main surface of a disc-shaped body 221 of the stator flange 22. The stator flange 22 can be fixedly connected to the stator core 21, and the stator core 21 can be connected to the housing 10 via the stator flange 22, thereby reducing the difficulty of assembling the stator assembly 20. At least one of the inner ring coil portion 212 and the outer ring coil portion 211 is configured to extend beyond the disc-shaped body 221 in the radial direction Y or to maintain a predetermined gap with the disc-shaped body 221 in the axial direction X. Alternatively, the inner ring coil portion 212 or the outer ring coil portion 211 may extend beyond the disc-shaped body 221 in the radial direction Y, or both the inner ring coil portion 212 and the outer ring coil portion 211 may extend beyond the disc-shaped body 221 in the radial direction Y; or the inner ring coil portion 212 and / or the outer ring coil portion 211 may maintain a predetermined gap with the disc-shaped body 221 in the axial direction X. Through the above method, the coolant can directly contact the inner ring coil part 212 and / or the outer ring coil part 211 through a predetermined gap, which can increase the contact amount of the coolant with the inner ring coil part 212 and / or the outer ring coil part 211 and improve the cooling effect.

[0115] In some optional embodiments of the present application, the stator core 21 is attached and fixed to one main surface of a disc-shaped body 221 of the stator flange 22. The disc-shaped body 221 covers at least a portion of the cooling channel 122. The coolant flowing in the cooling channel 122 directly contacts the disc-shaped body 221. As a result, the stator flange 22 is used to fix the stator core 21 and serves as the basis for mating with the housing 10, thereby reducing assembly difficulty. The stator flange 22 can be fixedly connected to the stator core 21, and the stator core 21 can be connected to the housing 10 through the stator flange 22, thereby reducing the difficulty of manufacturing the stator assembly 20 and the difficulty of assembly with the housing 10.

[0116] In this embodiment, the housing 10 includes a second cylindrical portion 16 and two end plate portions (i.e., a first end plate portion and a second first end plate portion) that block the openings at both ends of the second cylindrical portion 16, so that the two end plate portions and the second cylindrical portion 16 cooperate to form an accommodating space 11. The stator assembly 20 and the rotor assembly 30 are arranged between the two end plate portions along the axial direction X. There are also two inner end surfaces (i.e., a first inner end surface and a second end surface) corresponding to the two end plate portions, and the cooling channel 122 is provided on at least one of the two inner end surfaces adjacent to the stator assembly 20. Specifically, in the single stator structure described in Figures 1-4, the cooling channel 122 is provided on the inner end surface 12. In the double stator structure described below, the cooling channel 122 can be provided on both inner end surfaces at the same time.

[0117] In the above embodiment, by opening the cooling channel 122 on the housing 10, the coolant flowing in the cooling channel 122 can directly contact the stator assembly 20, so that the coolant and the stator assembly 20 can complete heat exchange efficiently, thereby improving the cooling efficiency of the axial flux motor 1.

[0118] As further shown in Figures 1 and 2, the axial flux motor 1 further includes a partition assembly 40. The partition assembly 40 includes a partition body 42, which is positioned between the stator assembly 20 and the rotor assembly 30. The housing 10 and the partition body 42 cooperate to form a cooling space 41 for accommodating coolant and the stator assembly 20. The coolant in the cooling space 41 directly contacts the stator assembly 20. The partition body 42 can abut against a portion of the inner circumference of the housing 10, thereby dividing the accommodating space 11 into at least two spaces: one space is the cooling space 41 for accommodating coolant and the stator assembly 20, and the other space is for accommodating the rotor assembly 30. Coolant can be stored in the cooling space 41, which directly contacts the stator assembly 20. Therefore, positioning the partition body 42 between the stator assembly 20 and the rotor assembly 30 effectively utilizes the internal space of the housing 10, making the structure of the axial flux motor 1 more compact. In addition, the shell 10 cooperates with the partition body 42 to form a cooling space 41, in which the coolant is in direct contact with the stator assembly 20, which can efficiently realize heat exchange between the coolant and the stator assembly 20 and improve the cooling efficiency of the stator assembly 20.

[0119] Optionally, the housing 10 includes an end plate portion 12 , with an inner end surface 121 of the end plate portion 12 disposed toward the side of the stator assembly 20 away from the rotor assembly 30 . The inner end surface 121 of the end plate portion 12 is spaced apart from the partition body 42 along the axial direction X to define two side boundaries of the cooling space 41 in the axial direction X. Thus, by defining the boundaries of the cooling space 41 through the end plate portion 12 and the partition body 42 , the utilization rate of the accommodating space 11 of the housing 10 can be improved, making the structure of the entire axial flux motor 1 more compact.

[0120] Optionally, the housing 10 includes two cylindrical portions nested along the radial direction Y of the axial flux motor 1, the two cylindrical portions are respectively sealed with the partition body 42, and the cooling space 41 is arranged in an annular shape. Thus, the stator assembly 20 can be sealed in the cooling space 41 by a relatively simple structure, reducing the risk of coolant leakage. Specifically, in order to ensure that the rotating shaft of the rotor assembly 30 passes through, the stator assembly 20 is generally arranged in an annular shape. By utilizing the annular cooling space 41 to accommodate the stator assembly 20, a columnar space can be formed inside the annular cooling space 41 for placing bearings and allowing the rotating shaft of the rotor assembly 30 to be inserted. Since the columnar space and the annular cooling space 41 are isolated from each other, during the cooling process of the stator assembly 20, the coolant in the cooling space 41 will not enter the columnar space and affect the rotor assembly 30.

[0121] In a specific embodiment, the two cylindrical portions include a first cylindrical portion 15 and a second cylindrical portion 16 arranged around the first cylindrical portion 15, the first cylindrical portion 15 and the second cylindrical portion 16 extend toward the stator assembly 20, the first cylindrical portion 15 is for the rotating shaft portion of the rotor assembly 30 to pass through, the partition body 42 includes an inner ring matching portion 421 and an outer ring matching portion 422 arranged around the inner ring matching portion 421, wherein the inner ring matching portion 421 is sealed with the first cylindrical portion 15, and the outer ring matching portion 422 is sealed with the second cylindrical portion 16. The first cylindrical portion 15 and the second cylindrical portion 16 can be coaxially arranged. The first cylindrical portion 15 can abut against the inner ring matching portion 421 to achieve a sealed fit between the inner ring matching portion 421 and the first cylindrical portion 15. The second cylindrical portion 16 can abut against the outer ring matching portion 422 to achieve a sealed fit between the outer ring matching portion 422 and the second cylindrical portion 16, thereby forming an annular cooling space 41 between the first cylindrical portion 15 and the second cylindrical portion 16. Thus, the stator assembly 20 can be sealed within the cooling space 41 using a relatively simple structure, reducing the risk of coolant leakage.

[0122] Optionally, the inner ring matching portion 421 and / or the outer ring matching portion 422 are sealed with the stator assembly 20, thereby sealing the stator assembly 20 into the cooling space 41. In this way, the sealing performance of the cooling space 41 can be enhanced.

[0123] Optionally, the rotating shaft portion of the rotor assembly 30 is rotatably supported within the first cylindrical portion 15, and the first cylindrical portion 15 and the stator assembly 20 at least partially overlap in the axial direction X. The rotating shaft portion of the rotor assembly 30 extends into the first cylindrical portion 15 in the axial direction X and is further rotatably supported in the first cylindrical portion 15, and the first cylindrical portion 15 and the stator assembly 20 at least partially overlap in the axial direction X. This can reduce the axial X dimension of the axial flux motor 1, making the entire axial flux motor 1 more compact.

[0124] Referring to FIG. 5 , FIG. 5 is a schematic cross-sectional view of the first embodiment of the partition assembly provided in the present application.

[0125] In one embodiment, the baffle body 42 is embedded within the second cylindrical portion 16, and a seal is formed between the outer circumferential surface of the outer ring matching portion 422 and the inner circumferential surface of the second cylindrical portion 16. This allows the baffle body 42 to be positioned within the accommodating space 11, thereby providing better protection for the baffle body 42 while forming the cooling space 41. Optionally, a third cylindrical portion 423 is provided on the inner ring matching portion 421. The third cylindrical portion 423 is plugged into the first cylindrical portion 15 to form a seal therebetween. The plug-in fit between the third cylindrical portion 423 and the first cylindrical portion 421 achieves better alignment and sealing effects.

[0126] The third cylindrical portion 423, the second cylindrical portion 16, and the first cylindrical portion 15 can be coaxially arranged. The dimension of the third cylindrical portion 423 in the radial direction Y is not equal to the dimension of the first cylindrical portion 15 in the radial direction Y. The third cylindrical portion 423 and the first cylindrical portion 15 are pluggable and mated with each other in the axial direction X. The outer circumferential surface of the third cylindrical portion 423 can be arranged to abut against the inner circumferential surface of the first cylindrical portion 15, or the inner circumferential surface of the third cylindrical portion 423 can be arranged to abut against the outer circumferential surface of the first cylindrical portion 15, thereby limiting the third cylindrical portion 423 in the radial direction Y by the first cylindrical portion 15. At the same time, the side of the first cylindrical portion 15 facing the inner ring matching portion 421 can abut against the inner ring matching portion 421, thereby limiting the diaphragm body 42 in the axial direction X and fixing the diaphragm body 42 in the housing 10.

[0127] Optionally, the third cylindrical portion 423 is inserted into the periphery of the first cylindrical portion 15. The dimension of the third cylindrical portion 423 along the radial direction Y can be larger than the dimension of the first cylindrical portion 15 along the radial direction Y. The first cylindrical portion 15 is inserted into the third cylindrical portion 423, and the inner circumferential surface of the third cylindrical portion 423 can be configured to fit the outer circumferential surface of the first cylindrical portion 15, thereby defining a space for mounting a bearing within the first cylindrical portion 15 while restricting the diaphragm body 42 within the housing 10. The axial flux motor 1 also includes a bearing disposed within the first cylindrical portion 15, which can be used to connect to the rotor assembly 30. In this case, the housing 10 can be made of a metal material to provide relatively strong structural strength, while the diaphragm body 42 can be made of a lightweight material such as plastic or silicone to provide a better sealing effect while reducing the overall weight of the axial flux motor 1.

[0128] The separator body 42 includes an oil collecting plate 424, which cooperates with the first cylindrical portion 15 to form an oil reservoir 4241. The lubricating oil in the oil reservoir 4241 lubricates the bearing. The oil collecting plate 424 can be located on the inner ring matching portion 421 or separately from the inner ring matching portion 421. When a bearing is placed in the first cylindrical portion 15, the bearing and the oil collecting plate 424 overlap in the radial direction Y and have a clearance fit in the axial direction X, thereby forming the oil reservoir 4241. The oil reservoir 4241 is used to store lubricating oil, which is used to ensure continuous and stable lubrication of the bearing.

[0129] Optionally, the oil collecting plate 424 is connected to the third cylindrical portion 423 and extends toward the interior of the third cylindrical portion 423 along the radial direction Y of the axial flux motor 1. Thus, once the third cylindrical portion 423 is inserted into position relative to the first cylindrical portion 15, the oil collecting plate 424 can cooperate with the first cylindrical portion 15 to form an oil reservoir 4241, simplifying the assembly process of the oil collecting plate 424 and further enhancing the structural strength of the partition body 42.

[0130] In one embodiment, the diaphragm assembly 40 includes a reinforcement member 425. The reinforcement member 425 is cylindrical and supported on the side of the diaphragm body 42 facing away from the stator assembly 20. The rotor assembly 30 is disposed within the reinforcement member 425. Optionally, the cylindrical reinforcement member 425 can be coaxially disposed with the diaphragm body 42 and connected to the outer ring matching portion 422. The reinforcement member 425 supports the diaphragm body 42, thereby reducing unnecessary deformation of the diaphragm body 42 during assembly of the housing 10 and improving the structural stability of the diaphragm body 42.

[0131] Optionally, the reinforcement member 425 is configured to abut against the housing 10. For example, in FIG2 , the reinforcement member 425 abuts against the inner end surface opposite the inner end surface 121. In other embodiments, the reinforcement member 425 may abut against the second cylindrical portion 16. Thus, the support force provided by the housing 10 on the reinforcement member 425 can further enhance the structural stability of the partition body 42.

[0132] In the embodiment of the present application, the stator assembly 20 includes a stator core 21 and a coil wound around the stator core 21. The stator core 21 is annular, and the coil protrudes from opposite sides of the stator core 21 along the radial direction Y of the axial flux motor 1. That is, a portion of the coil may protrude from the inner ring of the stator core 21, forming an inner ring coil portion 212, and a portion may protrude from the outer ring of the stator core 21, forming an outer ring coil portion 211. The inner ring coil portion 212 and / or the outer ring coil portion 211 are located within the cooling space 41, and the coolant within the cooling space 41 directly contacts the inner ring coil portion 212 and / or the outer ring coil portion 211, thereby improving the cooling efficiency of the stator assembly 20.

[0133] Furthermore, as described above, when the stator core 21 is fixed by the stator flange 22, at least one of the inner ring coil portion 212 and the outer ring coil portion 211 can be configured to extend beyond the disc-shaped body 221 in the radial direction Y or to maintain a predetermined gap with the disc-shaped body 221 in the axial direction X, thereby obtaining a better cooling effect.

[0134] 6-8 , FIG6 is a structural schematic diagram of an embodiment of the stator assembly provided in the present application, FIG7 is a structural schematic diagram of a second embodiment of the partition assembly provided in the present application, and FIG8 is a cross-sectional schematic diagram of the second embodiment of the partition assembly provided in the present application.

[0135] The stator assembly 20 includes a stator core 21 and coils wound around the stator core 21. The stator core 21 is provided with a plurality of stator slots 213, into which coils are embedded. The partition body 42 includes a plurality of embedded ribs 426 corresponding to the positions of the stator slots 213. Each embedded rib 426 is embedded within a corresponding stator slot 213. The number of stator slots 213 and the number of embedded ribs 426 can be in a one-to-one correspondence. When an embedded rib 426 is embedded in a corresponding stator slot 213, it directly contacts the coils through the embedded ribs 426, effectively securing the coils within the stator slots 213. When the partition body 42 is made of a highly thermally conductive material, coolant in the cooling space 41 can contact the partition body 42, lowering its temperature. The embedded ribs 426 of the partition body 42 then cool the coils within the stator slots 213. In some other embodiments, the embedded ribs 426 may also be spaced apart from the coils in the stator slots 213 , as long as the coils are ensured not to escape from the stator slots 213 .

[0136] Furthermore, the plurality of stator slots 213 and the plurality of embedded ribs 426 are radially extended relative to the axial direction X, thereby providing a larger number of stator slots 213 and embedded ribs 426 within a limited space, and the plurality of embedded ribs 426 are respectively connected to the inner ring matching portion 421 and / or the outer ring matching portion 422. Thus, the assembly process of the embedded ribs 426 can be simplified, and the embedded ribs 426 can be used to assist in fixing the inner ring matching portion 421 and / or the outer ring matching portion 422, thereby improving structural stability. When the inner ring matching portion 421 is sealed with the first cylindrical portion 15, or when the outer ring matching portion 422 is sealed with the second cylindrical portion 16, the embedded ribs 426 connected to the inner ring matching portion 421 and / or the outer ring matching portion 422 can be synchronously embedded in the stator slots 213, making the assembly method more convenient. Since the stator slots 213 and the embedded ribs 426 are radially extended, their number can be increased, so that the contact area between the partition body 42 and the stator core 21 and the coil is larger, thereby further increasing the cooling effect of the coolant on the stator assembly 20.

[0137] Furthermore, since the stator slots 213 and the embedded ribs 426 are radially extended, the embedded ribs 426 can provide good circumferential positioning and radial positioning for the connected inner ring matching part 421 and / or outer ring matching part 422, and when the embedded ribs 426 are fixed in the stator slots 213 by embedding or other means, they can also provide good axial positioning for the connected inner ring matching part 421 and / or outer ring matching part 422.

[0138] Optionally, no filling is performed between the multiple embedded ribs 426, that is, a hollow arrangement is provided. The hollow arrangement is advantageous in reducing the air gap width between the partition body 42 and the rotor assembly 30, making the structure of the entire axial flux motor 1 more compact.

[0139] Optionally, the partition body 42 also includes a sealing plate 427 for sealing the gaps between multiple embedded ribs 426. The sealing plate 427 is located on the side of the embedded rib 426 away from the stator slot 213, and the sealing plate 427 can be a whole plate. The gaps between the embedded ribs 426 can be sealed by the sealing plate 427. Thus, the sealing plate 427 can enhance the sealing of the cooling space 41, making it difficult for the coolant to leak from the cooling space 41.

[0140] It should be noted that, as described above, the housing 10 includes an end plate portion 12. The inner end surface 121 of the end plate portion 12 is disposed toward the side of the stator assembly 20 that faces away from the rotor assembly 30. A cooling channel 122 is provided on the inner end surface 121 of the end plate portion 12. Coolant within the cooling space 41 flows along the cooling channel 122. The stator assembly 20 covers at least a portion of the cooling channel 122, and coolant flowing within the cooling channel 122 directly contacts the stator assembly 20. The stator assembly 20 includes a stator flange 22 and a stator core 21. The stator flange 22 includes a disc-shaped body 221. The stator core 21 is attached to and fixed to the main surface of the disc-shaped body 221 on a side facing away from the end plate portion 12. The disc-shaped body 221 covers at least a portion of the cooling channel 122, and coolant flowing within the cooling channel 122 directly contacts the disc-shaped body 221.

[0141] In addition, at least one of the inner ring coil portion 212 and the outer ring coil portion 211 is configured to extend beyond the disc-shaped body 221 along the radial direction Y of the axial flux motor 1 or to maintain a predetermined gap with the disc-shaped body 221 along the axial direction X of the axial flux motor 1, and the coolant is in direct contact with at least one of the inner ring coil portion 212 and the outer ring coil portion 211.

[0142] Furthermore, the cooling channel 122 includes at least two circumferential flow channels 1221 and at least one radial flow channel 1222. The at least two circumferential flow channels 1221 are arranged at intervals along the radial direction Y of the axial flux motor 1. The radial flow channel 1222 is arranged along the radial direction Y of the axial flux motor 1 and is connected to the at least two circumferential flow channels 1221.

[0143] In other embodiments, similar cooling channels may be provided on the side of the partition body 42 facing the end plate portion 12 and / or the stator assembly 20 to allow coolant to flow.

[0144] In other embodiments, the partition assembly 40 may be eliminated, and the stator assembly 20 and the inner end surface 121 of the end plate portion 12 may cooperate to form a closed cooling space.

[0145] The above embodiment is primarily described based on a single-stator structure, i.e., the stator assembly includes only one stator assembly. In some other feasible embodiments of the present application, the partition assembly 40 is also applicable to a dual-stator structure, i.e., the stator assembly includes two stator assemblies spaced apart in the axial direction X, with the rotor assembly located between the two stator assemblies. The two stator assemblies are used to improve the stability and output efficiency of the axial flux motor 1.

[0146] Refer to Figures 9-11, Figure 9 is a cross-sectional schematic diagram of the second embodiment of the axial flux motor provided in the present application excluding the rotor assembly, Figure 10 is a disassembled schematic diagram of the second embodiment of the axial flux motor provided in the present application, and Figure 11 is a cross-sectional schematic diagram of the second embodiment of the axial flux motor provided in the present application.

[0147] The stator assembly 20 includes a first stator assembly 20a and a second stator assembly 20b spaced apart along the axial direction X. The rotor assembly 30 is disposed between the first stator assembly 20a and the second stator assembly 20b. In other words, in this embodiment, the axial flux motor 1 can be a dual-stator axial flux motor 1, and the two stator assemblies improve the stability and output efficiency of the axial flux motor 1, as well as the integration level of the axial flux motor 1. The rotor assembly 30 can include one or two rotor assemblies. When the rotor assembly 30 includes two rotor assemblies, the two rotor assemblies can be connected via a rotating shaft, with one rotor assembly corresponding to the first stator assembly 20a and the other rotor assembly corresponding to the second stator assembly 20b. The first stator assembly 20a, the two rotor assemblies, and the second stator assembly 20b can be arranged sequentially along the axial direction X of the axial flux motor 1, thereby improving the integration level of the axial flux motor 1.

[0148] Furthermore, the axial flux motor 1 includes a partition assembly 40, which includes a first partition body 42a and a second partition body 42b. The first partition body 42a cooperates with the shell 10 to form a first cooling space 41a for accommodating coolant and the first stator assembly 20a, and the second partition body 42b cooperates with the shell 10 to form a second cooling space 41b for accommodating coolant and the second stator assembly 20b. The coolant in the first cooling space 41a can directly contact the first stator assembly 20a in the first cooling space 41a, and the coolant in the second cooling space 41b can directly contact the second stator assembly 20b in the second cooling space 41b, thereby efficiently forming heat exchange between the coolant and the first stator assembly 20a and the second stator assembly 20b, thereby improving the cooling efficiency of the stator assembly 20.

[0149] Specifically, in order to quickly cool the first stator assembly 20a and the second stator assembly 20b, the housing 10 includes a first end plate portion 12a and a second end plate portion 12b. The first end plate portion 12a includes a first inner end surface 121a, and the second end plate portion 12b includes a second inner end surface 121b. The first inner end surface 121a is disposed toward the first stator assembly 20a, and the second inner end surface 121b is disposed toward the second stator assembly 20b. The first inner end surface 121a may be provided with a first cooling channel 122a, and the second inner end surface 121b may be provided with a second cooling channel 122b. The cooling channel 122b and the first cooling channel 122a can be configured so that the coolant flowing in the first cooling channel 122a directly contacts the first stator assembly 20a, and the second cooling channel 122b can be configured so that the coolant flowing in the second cooling channel 122b directly contacts the second stator assembly 20b, thereby allowing the coolant to directly contact the first stator assembly 20a and the second stator assembly 20b, and efficiently allowing the coolant to complete heat exchange with the first stator assembly 20a and the second stator assembly 20b, thereby improving the cooling efficiency of the stator assembly 20.

[0150] The first stator assembly 20a is located between the first inner end face 121a and the first partition body 42a, and the first partition body 42a cooperates with the first inner end face 121a to form a first cooling space 41a for accommodating the coolant and the first stator assembly 20a. The second stator assembly 20b is located between the second inner end face 121b and the second partition body 42b, and the second partition body 42b cooperates with the second inner end face 121b to form a second cooling space 41b for accommodating the coolant and the second stator assembly 20b. A first cooling channel 122a may be provided on the first inner end face 121a, and a second cooling channel 122b may be provided on the second inner end face 121b, so that the coolant and the first stator assembly 20a and the second stator assembly 20b can complete heat exchange efficiently, thereby improving the cooling efficiency of the stator assembly 20.

[0151] It is worth noting that, as described above, the first cooling channel 122a and the second cooling channel 122b are not necessary conditions for forming the first cooling space 41a and the second cooling space 41b, and can be eliminated according to actual needs, or cooling channels can be set at other corresponding positions.

[0152] Furthermore, a communication channel is provided on the partition assembly 40, and the communication channel is used to connect the first cooling space 41a and the second cooling space 41b.

[0153] Furthermore, the communication channel includes a first communication channel 431 and a second communication channel 432, which are arranged opposite each other along the radial direction Y. This improves the consistency of the cooling effect of the two cooling spaces 41. The first communication channel 431 and the second communication channel 432 can be located at the outer peripheral edge of the partition assembly 40. One of the first communication channel 431 and the second communication channel 432 can be used to allow coolant to flow from the first cooling space 41a to the second cooling space 41b, while the other allows coolant to flow from the second cooling space 41b to the first cooling space 41a. For example, the first and second connecting passages 431 and 432 both connect the first and second cooling spaces 41a and 41b. If coolant enters the first cooling space 41a from the outside, it can then enter the second cooling space 41b through the first connecting passage 431. After completing heat exchange with the second stator assembly 20b in the second cooling space 41b, the coolant can then flow through the second connecting passage 432 into the first cooling space 41a. The coolant is then transported out of the housing 10 from the first cooling space 41a. This ensures cooling efficiency for the stator assembly 20 while also improving the consistency of the cooling effects of the two cooling spaces 41. Furthermore, the coolant circulation method can be simplified.

[0154] Optionally, the stator assembly 20 and the rotor assembly 30 are arranged between the first end plate portion 12a and the second end plate portion 12b along the axial direction X, and a liquid inlet 13 and a liquid outlet 14 are provided on one of the first end plate portion 12a and the second end plate portion 12b, and the liquid inlet 13 and the liquid outlet 14 are respectively arranged opposite to the first connecting channel 431 and the second connecting channel 432 along the axial direction X of the axial flux motor 1. For example, taking the first end plate portion 12a as an example in which both the liquid inlet 13 and the liquid outlet 14 are provided, the coolant enters the first cooling space 41a from the liquid inlet 13, part of the coolant flows in the first cooling space 41a, directly contacts the first stator assembly 20a, and completes heat exchange with the first stator assembly 20a before flowing out of the first cooling space 41a from the liquid outlet 14, and the remaining part of the coolant enters the second cooling space 41b from the first connecting channel 431, directly contacts the second stator assembly 20b, and completes heat exchange with the second stator assembly 20b before flowing out of the second cooling space 41b from the second connecting channel 432 to the first cooling space 41a, and finally flows out from the liquid outlet 14. Since the liquid inlet 13 and the liquid outlet 14 are respectively arranged opposite to the first connecting channel 431 and the second connecting channel 432 along the axial direction X of the axial flux motor 1, the coolant flowing into the second cooling space 41b through the first connecting channel 431 will not undergo excessive heat exchange with the first stator assembly 20a. At the same time, the coolant flowing into the first cooling space 41a through the second connecting channel 431 is merged with the coolant in the first cooling space 41a that completes heat exchange with the first stator assembly 20a. Therefore, while ensuring the cooling efficiency of the stator assembly 20 and the rotor assembly 30, the consistency of the cooling effects of the two cooling spaces 41 can also be improved.

[0155] In combination with Figures 12-14, Figure 12 is a disassembled schematic diagram of the first embodiment of the partition assembly of the second embodiment of the axial flux motor provided in the present application; Figure 13 is a disassembled schematic diagram of the second embodiment of the partition assembly of the second embodiment of the axial flux motor provided in the present application; Figure 14 is a disassembled schematic diagram of the third embodiment of the partition assembly of the second embodiment of the axial flux motor provided in the present application.

[0156] In one embodiment, the partition assembly 40 further includes a reinforcement member 425 and a channel member 440 connected between the first partition body 42a and the second partition body 42b. The reinforcement member 425 is cylindrical, and the rotor assembly 30 is disposed within the reinforcement member 425. The channel member 440 is disposed outside the reinforcement member 425, and the connecting channel is disposed on the channel member 440. This improves the structural stability of the first and second partition bodies 42a, 42b while preventing interference between the connecting channel and the rotor assembly 30. Furthermore, the location of the channel member 440 outside the reinforcement member 425 expands the flow range of the coolant in the first and second cooling spaces 41a, 41b, providing more comprehensive cooling for the axial flux motor 1 and improving the consistency of the cooling effect within the two cooling spaces 41. Furthermore, both the reinforcement member 425 and the channel member 440 are disposed on the partition assembly 40, which increases the integration level of the axial flux motor 1. At the same time, the channel member 440 disposed outside the reinforcement member can also alleviate the adverse effects on the rotor assembly 30 caused by coolant leakage in the communication channel.

[0157] In one embodiment, the diaphragm assembly 40 is provided with a plurality of pressure relief holes 4251 arranged at intervals along the circumferential direction Z of the axial flux motor 1. The pressure relief holes 4251 can be through holes and are used to balance the pressure fluctuations caused by the rotor assembly 30 during operation.

[0158] Optionally, the rotor assembly 30 and the diaphragm body 42 are spaced apart along the axial direction X, forming an air gap. This prevents interference between the rotor assembly 30 and the diaphragm body 42 due to vibration along the axial direction X during operation. During operation of the rotor assembly 30, the air pressure in the air gap may change, thereby affecting the rotational performance of the rotor assembly 30. In this embodiment, a pressure relief hole 4251 is used to connect the air gap with the space outside the diaphragm assembly 40. Pressure relief hole 4251 can be used to balance pressure fluctuations in the air gap caused by the operation of the rotor assembly 30, thereby reducing the impact of pressure fluctuations on the rotational performance of the rotor assembly 30.

[0159] In one embodiment, the partition assembly 40 is further provided with a return hole 4252, which is configured to discharge the coolant that penetrates from the cooling space 41 into the partition assembly 40 to the space outside the partition assembly 40. The return hole 4252 can be a through hole, thereby alleviating the adverse effects of the coolant leaking from the cooling space 41 on the axial flux motor 1.

[0160] Alternatively, as described above, the rotor assembly 30 is disposed in the reinforcement 425 , and thus the pressure relief hole 4251 and the return hole 4252 may be disposed on the reinforcement 425 . In this case, the pressure relief hole 4251 and the return hole 4252 connect the interior space of the reinforcement 425 with the exterior space of the diaphragm assembly 40 .

[0161] Optionally, multiple pressure relief holes 4251 are arranged at intervals along the circumferential direction Z of the axial flux motor 1 on the edge of the reinforcement 425 facing the partition body 42. The number of pressure relief holes 4251 can be set according to actual conditions, and the multiple pressure relief holes 4251 can be arranged at equal intervals along the circumferential direction Z of the axial flux motor 1, so that the air pressure within the reinforcement 425 can be simultaneously adjusted through the multiple pressure relief holes 4251. The return hole 4252 is centrally located relative to the two side edges of the reinforcement 425 along the axial direction X to enhance the pressure relief effect of the pressure relief hole 4251 and the return flow effect of the return hole 4252.

[0162] In one embodiment, when the axial direction X is arranged horizontally, the return hole 4252 is arranged on the lower side of the reinforcement 425 along the gravity direction, thereby allowing the coolant leaking into the reinforcement 425 to flow out from the return hole 4252 under its own gravity.

[0163] It is worth noting that the above-mentioned pressure relief hole 4251 and return hole 4252 are also applicable to the single stator structure described above.

[0164] It should be noted that the first partition body 42a and the second partition body 42b shown in FIG11 can completely adopt the same structure as the partition body 42 described in FIG1-4 and the same matching method with the shell 10, which will not be repeated here.

[0165] 12 and 13 , the first partition body 42a can be integrally formed with the reinforcement 425 and the channel member 440 or pre-assembled and fixed into an integrated component structure, and the second partition body 42b is assembled with the above-mentioned integrated component structure after the rotor assembly 30 is assembled to the reinforcement 425 .

[0166] It should be noted that the gaps between the embedded ribs 426 in FIG. 12 are blocked by the blocking plate 427 , while the gaps between the embedded ribs 426 in FIG. 13 are hollowed out.

[0167] Referring to Figure 14, in this embodiment, the outer ring matching portion 422 of the first partition body 42a and the second partition body 42b are integrally formed with the reinforcement 425 and the channel member 440 or pre-assembled and fixed into an integrated component structure, the inner ring matching portion 421 of the first partition body 42a and the embedded rib 426 are integrally formed or pre-assembled and fixed into an integrated component structure, and the inner ring matching portion 421 and the embedded rib 426 of the second partition body 42b are integrally formed or pre-assembled and fixed into an integrated component structure. By assembling the three to form a partition assembly 40, the partition assembly 40 can be easily disassembled and maintained.

[0168] Through the above-mentioned embodiment, a partition assembly 40 can be set between the stator assembly 20 and the rotor assembly 30 and / or a cooling channel 122 can be opened on the housing 10, so that the coolant can directly contact the stator assembly 20, so as to efficiently complete heat exchange between the coolant and the stator assembly 20, thereby improving the cooling efficiency of the axial flux motor 1.

[0169] In order to improve the assembly efficiency of the stator assembly, accurately install the stator assembly in the housing, and facilitate direct cooling of the stator assembly by coolant in the housing, the axial flux motor provided in the present application also includes improvements to the stator assembly. The following content mainly describes the structure of the stator assembly, see Figure 15, which is a schematic structural diagram of the first embodiment of the stator assembly provided in the present application.

[0170] The stator assembly 20 includes a stator core 21 and a stator flange 22. The stator flange 22 includes a disc-shaped body 221. The stator core 21 is attached to one major surface of the disc-shaped body 221. The disc-shaped body 221 is used to secure the stator core 21 to the end plate of the housing when the stator assembly 20 is placed in the housing. The stator core 21 can be fixedly or removably connected to the major surface of the disc-shaped body 221. The major surface can be defined as the largest surface of the stator flange 22. For example, the disc-shaped body 221 can be disc-shaped, with both opposing side surfaces of the disc-shaped body 221 defined as major surfaces. The stator flange 22 can be used to mount the stator core 21 on the end plate of the housing of an axial X-flux motor. The stator assembly 20 can use the stator flange 22 as a mounting and positioning reference, thereby improving the positioning accuracy and processing efficiency of the stator assembly 20.

[0171] Refer to FIG16 , which is a disassembled schematic diagram of the first embodiment of the stator assembly provided in this application.

[0172] The disc-shaped body 221 is provided with a plurality of through-grooves 223 that communicate with both main surfaces of the disc-shaped body 221. The stator core 21 is attached to one main surface of the disc-shaped body 221 and is provided with a plurality of protrusions 222 corresponding to the plurality of through-grooves 223. The protrusions 222 are inserted into the corresponding through-grooves 223. The disc-shaped body 221 and the stator core 21 are welded together along the mating edges of the through-grooves 223 and the protrusions 222. Optionally, the number of the protrusions 222 and the through-grooves 223 are in a one-to-one correspondence, and one protrusion 222 can be inserted into one through-grooves 223. The disc-shaped body 221 and the stator core 21 can be fixed by welding, so that the stator core 21 and the stator flange 22 can be assembled into the housing as a whole. The through-slot 223 and the raised portion 222 have similar shapes. For example, both are square. After the raised portion 222 is inserted into the through-slot 223, the stator core 21 and the stator flange 22 are positioned relative to each other by the through-slot 223 and the raised portion 222. This facilitates welding and securing the disc-shaped body 221 to the stator core 21 along the mating edges of the through-slot 223 and the raised portion 222. This reduces the difficulty of machining and assembling the stator core 21 of the stator assembly 20 and reduces electromagnetic losses in the stator core 21.

[0173] Optionally, a plurality of through slots 223 are arranged at intervals along the circumferential direction Z of the disc-shaped body 221. The through slots 223 may be arranged at different positions of the disc-shaped body 221 along the circumferential direction Z of the disc-shaped body 221. The plurality of through slots 223 may be arranged at equal intervals along the circumferential direction Z of the disc-shaped body 221 to improve the stability of the connection between the disc-shaped body 221 and the stator core 21.

[0174] Optionally, multiple through slots 223 are provided to extend along the radial direction Y of the disc-shaped body 221 and spread out radially. The through slots 223 may extend along the radial direction Y of the disc-shaped body 221 at different positions of the disc-shaped body 221 to improve the stability of the connection between the disc-shaped body 221 and the stator core 21.

[0175] See FIG. 17 , which is a schematic structural diagram of an embodiment of a stator flange provided in the present application.

[0176] The plurality of through slots 223 are arranged to extend in an arc shape along the circumferential direction Z of the disc-shaped body 221. The plurality of through slots 223 can be spaced apart along the circumferential direction Z of the disc-shaped body 221 to increase the welding area between the disc-shaped body 221 and the stator core 21 and improve the stability of the connection between the disc-shaped body 221 and the stator core 21.

[0177] Furthermore, the plurality of through-slots 223 are divided into at least two through-slot groups 2231 nested within each other and spaced apart along the radial direction Y of the disc-shaped body 221. Each through-slot group 2231 includes at least two through-slots 223 spaced apart along the circumferential direction Z of the disc-shaped body 221. The through-slots 223 in the same group may be located on the circumference of the same reference circle, while the through-slots 223 in different groups may be located on the circumference of reference circles of different diameters. The number of through-slots 223 in each through-slot group 2231 may be the same. The closer the through-slot group 2231 is to the central axis of the disc-shaped body 221, the shorter the extension length of each through-slot 223. The plurality of through-slots 223 in the same group may be spaced apart along the circumferential direction Z of the disc-shaped body 221. The through-slots 223 in two adjacent through-slot groups 2231 are at least partially staggered along the circumferential direction Z of the disc-shaped body 221. Exemplarily, multiple through slots 223 can be divided into three through slot groups 2231, each group of through slots 223 includes eight through slots 223, the eight through slots 223 are all arranged in an arc shape, and the eight through slots 223 are arranged at equal intervals along the circumferential direction Z of the disc-shaped body 221, the through slots 223 between different groups are spaced apart in the radial direction Y of the disc-shaped body 221, and the through slots 223 in the outermost circle of the through slot group 2231 and the through slots 223 in the middle through slot group 2231 are at least partially staggered along the circumferential direction Z of the disc-shaped body 221, so that the structural strength of the disc-shaped body 221 can be ensured in the above manner, and the stability of the connection between the disc-shaped body 221 and the stator core 21 can be further improved.

[0178] See FIG. 18 , which is a schematic structural diagram of an embodiment of a stator core provided in the present application.

[0179] The stator core 21 is formed by winding a strip of sheet material. A protrusion 2221 is protruding from one edge of the strip, and an open slot 2131 is recessed into one edge of the strip. The protrusion 2221 forms a raised portion 222 as the strip is wound, while the open slot 2131 forms a stator slot 213 for accommodating the coils. Compared to traditional die-casting, winding the stator core 21 allows for more efficient molding. In addition, a plurality of protrusions 2221 are protrudingly provided on one side of the strip sheet, and the plurality of protrusions 2221 are arranged at predetermined intervals on one side of the strip sheet. After the strip sheet is wound to form the stator core 21, the plurality of protrusions 2221 cooperate with the back of the stator core 21 to form a protrusion 222, thereby facilitating efficient forming of the protrusion 222; similarly, a plurality of open slots 2131 can be provided at predetermined intervals on the other side of the strip sheet. After the strip sheet is wound to form the stator core 21, the plurality of open slots 2131 cooperate with the side of the stator core 21 away from the protrusion 222 to form a stator slot 213 for embedding the coil, thereby facilitating efficient forming of the open slots 2131.

[0180] 15 to 19 , FIG19 is a schematic cross-sectional view of the stator core shown in FIG15 .

[0181] The disc-shaped body 221 is provided with a plurality of stepped holes 2211. The stepped holes 2211 include a first hole section 22111 and a second hole section 22112. The first hole section 22111 connects to one main surface of the disc-shaped body 221 facing the stator core 21, while the second hole section 22112 connects to the other main surface of the disc-shaped body 221 facing away from the stator core 21. The aperture of the first hole section 22111 is larger than that of the second hole section 22112, thereby forming an annular table at the junction of the second hole section 22112 and the first hole section 22111. Both the first hole section 22111 and the second hole section 22112 can be cylindrical holes, and the first hole section 22111 and the second hole section 22112 are connected to each other and further connected to both main surfaces of the disc-shaped body 221. The plurality of stepped holes 2211 may be arranged at equal intervals around the circumference Z of the disc-shaped body 221 . The plurality of stepped holes 2211 are all arranged away from the center of the disc-shaped body 221 in the radial direction Y of the disc-shaped body 221 .

[0182] The stator assembly 20 includes a fixing member 23 inserted into the stepped hole 2211. The fixing member 23 is recessed within the first hole section 22111 and supported on the first annular table. The fixing member 23 may also have a two-stage structure, where the dimension of the first section of the fixing member 23 along the radial direction Y is larger than the dimension of the second section of the fixing member 23 along the radial direction Y and smaller than the dimension of the first hole section 22111 along the radial direction Y. This allows the first section of the fixing member 23 to be recessed within the first hole section 22111 and supported on the first annular table, while the second section of the fixing member 23 at least partially protrudes from the second hole section 22112, thereby connecting to the housing. The number of fixing members 23 is the same as the number of stepped holes 2211. There is a one-to-one correspondence between fixing members 23 and stepped holes 2211, meaning that one fixing member 23 can be placed in each stepped hole 2211.

[0183] In one embodiment, the fixing member 23 is pre-inserted into the stepped hole 2211 before the disc-shaped body 221 is welded to the stator core 21. The projection of the stator assembly 20 along the axial direction X of the stator assembly 20 covers the fixing member 23, so that the fixing member 23 is retained in the stepped hole 2211. Before the disc-shaped body 221 is welded to the stator core 21, the fixing member 23 is first placed into the stepped hole 2211, and then the disc-shaped body 221 is connected and fixed to the stator core 21. The annular table and the stator core 21 can then be used to retain the fixing member 23 in the stepped hole 2211, preventing the fixing member 23 from falling out of the stepped hole 2211.

[0184] Furthermore, the disc-shaped body 221 and the stator core 21 are both annular in shape, and the stator assembly 20 also includes a coil wound around the stator core 21. The coil extends beyond the annular surfaces of the stator core 21 on both sides along the radial direction Y of the stator assembly 20 to form an inner ring coil portion 212 and an outer ring coil portion 211. Because the stator core 21 is annular in shape, when the coil is wound around the stator core 21, the coil protrudes from both the inner and outer ring sides of the stator core 21. The coil protruding from the inner ring surface of the stator core 21 is the inner ring coil portion 212, and the coil protruding from the outer ring surface of the stator core 21 is the outer ring coil portion 211.

[0185] The disc-shaped body 221 includes a central portion 2212 and an annular edge portion 2213 disposed around the central portion 2212. The annular edge portion 2213 cooperates with the central portion 2212 to form a recessed area. The stator core 21 is disposed within the recessed area, and the stepped hole 2211 is disposed on the annular edge portion 2213. The projection of the outer ring coil portion 211 along the axial direction X of the stator assembly 20 covers the fixing member 23. The thickness of the central portion 2212 can be smaller than that of the annular edge portion 2213 to form a recessed area in the central portion 2212. The dimensions of the recessed area can match those of the main surface of the stator core 21, allowing the stator core 21 to be placed within the recessed area, with at least a portion of the outer circumferential surface of the stator core 21 aligned with the inner annular surface of the annular edge portion 2213. The stepped hole 2211 is arranged on the annular edge portion 2213, so that the projection of the outer ring coil portion 211 along the axial direction X of the stator assembly 20 covers the stepped hole 2211, so that when the fixing part 23 is set in the stepped hole 2211, the outer ring coil portion 211 covers the stepped hole 2211, so that the annular table and the outer ring coil portion 211 can be used to keep the fixing part 23 in the stepped hole 2211, so that the fixing part 23 will not fall out of the stepped hole 2211.

[0186] Furthermore, at least one of the inner ring coil portion 212 and the outer ring coil portion 211 extends beyond the disc-shaped body 221 along the radial direction Y of the stator assembly 20 or is spaced apart from the disc-shaped body 221 along the axial direction X, so that when the stator assembly 20 is fixed to the end plate portion of the shell, the coolant input from the end plate portion directly contacts at least one of the inner ring coil portion 212 and the outer ring coil portion 211. Specifically, the inner ring coil portion 212 or the outer ring coil portion 211 may extend beyond the disc-shaped body 221 in the radial direction Y, or both the inner ring coil portion 212 and the outer ring coil portion 211 may extend beyond the disc-shaped body 221 in the radial direction Y; or the inner ring coil portion 212 and / or the outer ring coil portion 211 may maintain a predetermined gap with the disc-shaped body 221 in the axial direction X of the disc-shaped body 221, so that the coolant can directly contact the inner ring coil portion 212 and / or the outer ring coil portion 211 through the predetermined gap, thereby increasing the contact amount of the coolant with the inner ring coil portion 212 and / or the outer ring coil portion 211, thereby improving the efficiency of the coolant in cooling the stator assembly 20.

[0187] Furthermore, the width of the disc-shaped body 221 along the radial direction Y is smaller than the width of the stator core 21 along the radial direction Y. This allows the coolant to directly contact the stator core 21 not covered by the disc-shaped body 221, further improving the coolant's efficiency in cooling the stator assembly 20. This also reduces the weight of the stator flange 22 and lowers production costs.

[0188] The stator flange 22 and the fixing member 23 are both non-magnetic conductive parts, thereby reducing electromagnetic loss.

[0189] In the embodiment of the stator assembly 20 described above, a stepped hole is provided on the disc-shaped body 221, and the stepped hole on the disc-shaped body 221 is matched with a fixing member to achieve fixation. However, in another embodiment provided in the present application, holes can also be simultaneously opened on the stator flange 22 and the disc-shaped body 221 to form a stepped hole of another embodiment. See Figures 20 and 21 for details. Figure 20 is a structural schematic diagram and a cross-sectional schematic diagram of the second embodiment of the stator assembly provided in the present application, and Figure 21 is a disassembled schematic diagram of the second embodiment of the stator assembly provided in the present application. Figure 20 a is a structural schematic diagram of the second embodiment of the stator assembly, and Figure 20 b is a cross-sectional schematic diagram of Figure 20 a along the AA direction.

[0190] The stator assembly 20 is provided with a stepped hole 24, which extends through the disc-shaped body 221 and the stator core 21 along the axial direction X of the stator assembly 20. The stepped hole 24 includes a first hole section 241 and a second hole section 242. The first hole section 241 is located within the stator core 21 and connects the main surface of the stator core 21 facing away from the disc-shaped body 221. The second hole section 242 is located within the disc-shaped body 221 and connects the main surface of the disc-shaped body 221 facing away from the stator core 21. The aperture of the first hole section 241 is larger than the aperture of the second hole section 242. Both the first hole section 241 and the second hole section 242 can be cylindrical holes. The first hole section 241 connects the two main surfaces of the stator core 21, while the second hole section 242 connects the two main surfaces of the disc-shaped body 221. The first hole section 241 and the second hole section 242 are correspondingly arranged in the axial direction X of the disc-shaped body 221.

[0191] The stepped hole 24 is used to allow the fixing member 23 to be inserted from the side of the stator core 21 facing away from the disc-shaped body 221 when the stator assembly 20 is placed in the housing. The fixing member 23 is then sunk into the first hole section 241, thereby securing the stator assembly 20 to the end plate portion of the housing. The fixing member 23 may have a two-stage structure, with the first stage of the fixing member 23 having a larger radial dimension Y than the second stage of the fixing member 23. This allows the first stage of the fixing member 23 to be sunk into the first hole section 241, while the second stage of the fixing member 23 is inserted into the second hole section 242 and at least partially protrudes from the second hole section 242.

[0192] In this embodiment, a first hole section 241 is formed on the stator core 21, a second hole section 242 is formed on the disc-shaped body 221, and the fixing member 23 is sunk into the first hole section 241. Thus, the stator assembly 20 can be fixed to the end plate portion of the shell without the stator core 21 having to avoid the second hole section 242. This can increase the overall volume of the stator core 21 and improve the magnetic field strength of the stator assembly 20.

[0193] Furthermore, the stepped hole 24 also includes a third hole segment 243, which is located within the stator core 21 and connected between the first hole segment 241 and the second hole segment 242. The diameter of the third hole segment 243 is smaller than that of the first hole segment 241, thereby forming an annular table surface at the connection between the third hole segment 243 and the first hole segment 241. The fixing member 23 is also pressed and fixed on the annular table surface. The dimension of the third hole segment 243 along the radial direction Y can be the same as the dimension of the second hole segment 242 along the radial direction Y. The first hole segment 241 and the third hole segment 243 are interconnected and jointly communicate with both main surfaces of the stator core 21. The larger section of the fixing member 23 can be fixed to the annular table surface, while the smaller section of the fixing member 23 can pass through the second hole segment 242 and the third hole segment 243 and protrude from the main surface of the disc-shaped body 221 facing away from the stator core 21. In this way, the stator core 21 can be further pressed and fixed to the disc-shaped body 221 by the fixing member 23. In addition, the diameter of the third hole section 243 is smaller than that of the first hole section 241, which is also helpful in alleviating the magnetic loss of the stator core 21.

[0194] Furthermore, there are multiple stepped holes 24, spaced apart along the circumferential direction Z of the stator assembly 20. The multiple stepped holes 24 can be equally spaced around the circumferential direction Z of the disc-shaped body 221, and the multiple stepped holes 24 are all centrally located along the radial direction Y of the disc-shaped body 221. The number of fixing members 23 is the same as the number of stepped holes 24, and there is a one-to-one correspondence between the fixing members 23 and the stepped holes 24, meaning that one fixing member 23 can be placed in each stepped hole 24.

[0195] Optionally, the stepped holes 24 and the through slots 223 are alternately arranged along the circumferential direction Z of the stator assembly 20. This makes the distribution of the stepped holes 24 and the through slots 223 uniform, reduces the difficulty of machining the stator assembly 20, and improves the stability of the installation between the stator core 21 and the stator flange 22, as well as the stability of the installation between the stator assembly 20 and the housing.

[0196] When the stator assembly 20 needs to be installed in the housing of the axial flux motor, it is only necessary to insert the fixing part 23 into the stepped hole 24 from the side of the stator core 21 away from the disc-shaped main body 221, and sink it into the first hole section 241, and then use the fixing part 23 to fix the stator assembly 20 on the end plate portion of the housing.

[0197] In the third embodiment provided herein, the fixing member 23 can also be integrated into the stator flange 22, thereby simplifying the installation of the stator core 21 and the stator flange 22 and improving the integration of the stator assembly 20. Referring to Figure 22, Figure 22 is a schematic structural diagram and a cross-sectional diagram of the third embodiment of the stator assembly provided herein. Figure 22a is a schematic structural diagram of the third embodiment of the stator assembly, and Figure 22b is a cross-sectional diagram of Figure 22a along the BB direction.

[0198] The stator flange 22 also includes multiple fixing posts 25. These are located on the main surface of the disc-shaped body 221, facing away from the stator core 21, and extend along the axial direction X of the stator assembly 20. These fixing posts 25 are used to secure the stator flange 22 to the end plate of the housing when the stator assembly 20 is placed within the housing. The fixing posts 25 can be hollow cylindrical and perpendicular to the main surface of the stator core 21, thereby improving the integration of the stator assembly 20. When the stator assembly 20 needs to be secured to the housing, it can be secured to the housing end plate via the fixing posts 25. This simplifies the installation of the stator core 21 and stator flange 22, improving production efficiency. Furthermore, there is no need to drill holes in the stator flange 22 or stator core 21, which reduces magnetic losses in the stator core 21.

[0199] Furthermore, the fixing post 25 is provided with an internal threaded hole 251 extending along the axial direction X. The internal threaded hole 251 can be threadedly connected to the stud, so that the fixing post 25 can be detachably mounted on the end plate portion of the housing, thereby simplifying the assembly process.

[0200] Furthermore, a plurality of fixing posts 25 are arranged at intervals along the circumferential direction Z of the stator assembly 20. A plurality of studs can be arranged at equal intervals along the circumferential direction Z of the stator assembly 20 so as to stably mount the stator assembly 20 on the end plate portion of the housing through the fixing posts 25.

[0201] The plurality of fixing posts 25 are integrally formed with the disc-shaped body 221 or separately formed from the disc-shaped body 221 and assembled and fixed on the disc-shaped body 221 .

[0202] Referring to FIG. 23 , FIG. 23 is a schematic structural diagram of an embodiment of a stator flange in the third embodiment of the stator assembly provided herein. Optionally, the plurality of fixing posts 25 are divided into a plurality of fixing post groups 252 . The plurality of fixing post groups 252 are spaced apart along the circumferential direction Z of the stator assembly 20 , and each fixing post group 252 includes at least two fixing posts 25 spaced apart along the radial direction Y of the stator assembly 20 . The plurality of fixing post groups 252 can be equally spaced along the circumferential direction Z of the stator assembly 20 . The number of fixing posts 25 in each fixing post group 252 can be the same, and the spacing between the fixing posts 25 in the fixing post group 252 in the radial direction Y of the stator assembly 20 can be the same. Thus, the plurality of fixing posts 25 can be regularly distributed on the disc-shaped body 221 , so that the stator assembly 20 can be stably mounted on the end plate portion of the housing via the fixing posts 25 .

[0203] Furthermore, the fixing posts 25 and the through-slots 223 are arranged alternately along the circumferential direction Z of the stator assembly 20. The number of through-slots 223 can be multiple, and the multiple through-slots 223 are arranged in an interval arrangement along the circumferential direction Z of the disc-shaped body 221. In one embodiment, referring to FIG. 22 , the multiple through-slots 223 are arranged to extend along the radial direction Y of the disc-shaped body 221 and spread out radially. Referring to FIG. 23 , the fixing post groups 252 and the through-slots 223 are arranged alternately along the circumferential direction Z of the stator assembly 20. In another embodiment, referring to FIG. 24 , the multiple through-slots 223 are arranged to extend in an arc shape along the circumferential direction Z of the disc-shaped body 221. In this embodiment, the alternating arrangement of the fixing posts 25 and the through-slots 223 along the circumferential direction Z of the stator assembly 20 not only improves the stability of the connection between the stator core 21 and the disc-shaped body 221, but also improves the stability of the disc-shaped body 221 when fixed to the end plate portion of the housing.

[0204] In order to improve the processing efficiency of the rotor assembly, facilitate the precise installation of the rotor assembly in the housing, and facilitate the direct cooling of the rotor assembly by coolant in the housing, the axial flux motor provided by the present application also includes improvements to the rotor assembly. The following content mainly describes the structure of the rotor assembly, see Figures 25 to 27. Figure 25 is a structural schematic diagram and a cross-sectional schematic diagram of the first embodiment of the rotor assembly provided by the present application. Figure 26 is an enlarged schematic diagram within the dotted box in Figure 25. Figure 27 is a disassembled schematic diagram of the first embodiment of the rotor assembly provided by the present application. Among them, a in Figure 25 is a structural schematic diagram of the first embodiment of the rotor assembly, and b in Figure 25 is a cross-sectional schematic diagram of a in Figure 25 along the CC direction.

[0205] The rotor assembly 30 includes a rotor core 31, a magnetic block 32, and a stopper 33. The rotor core 31 is provided with rotor slots 311, each with an open end located on the outer circumference of the rotor core 31. The magnetic block 32 is disposed within the rotor slots 311. The rotor core 31 can be annular to facilitate installation of the rotor assembly 30 in an axial X-flux motor. The rotor slots 311 are defined on the outer circumference of the rotor core 31 and extend toward the interior of the rotor core 31 along the radial direction Y of the rotor assembly 30. The open ends of the rotor slots 311 face outward from the rotor core 31, allowing the magnetic block 32 to fit into the rotor slots 311 from the open ends. The stopper 33 is located outside the rotor core 31 in the radial direction Y of the rotor assembly 30 and blocks the open ends along the axial direction X of the rotor assembly 30. The stopper 33 can be attached to the outer side of the rotor core 31 and cover the open end through the stopper 33 , so that the magnetic block 32 is limited in the rotor slot 311 through the stopper 33 .

[0206] Through the above-mentioned embodiment, the magnetic block 32 is limited in the rotor slot 311 by using the stopper 33 to reduce the risk of the magnetic block 32 escaping from the rotor slot 311, thereby improving the maximum speed capability of the rotor assembly 30, and by integrating the stopper 33, the magnetic block 32 and the rotor core 31 into the rotor assembly 30, the integration of the rotor assembly 30 can be improved and the size of the axial X-flux motor can be reduced.

[0207] Furthermore, the stopper 33 is an annular structure that surrounds the rotor core 31 along the circumferential direction Z of the rotor assembly 30. The inner side surface of the annular stopper 33 along the radial direction Y is equal to or slightly larger than the outer circumferential surface of the rotor core 31 along the radial direction Y. This allows the stopper 33 to surround the rotor core 31 and fit against the outer circumference of the rotor core 31, thereby retaining the magnetic block 32 within the rotor slot 311.

[0208] In one embodiment, the rotor core 31 includes a first end surface and a second end surface that are oppositely disposed along the axial direction X of the rotor assembly 30. The rotor slots 311 are disposed between the first end surface and the second end surface along the axial direction X of the rotor assembly 30. The rotor slots 311 extend toward the interior of the rotor core 31 along the radial direction Y of the rotor assembly 30. The magnetic blocks 32 located within the rotor slots 311 are restrained along the axial direction X of the rotor assembly 30.

[0209] In one embodiment, the rotor assembly 30 further includes a rotor flange 34, which includes a disc-shaped body 341. The rotor core 31 is affixed to one major surface of the disc-shaped body 341, and the stopper 33 is provided separately from the rotor flange 34. The rotor flange 34 is fixedly connected to the rotor core 31, and the rotor core 31 can be connected to the housing of the axial flux motor via the rotor flange 34, thereby reducing the difficulty in manufacturing the rotor assembly 30. Furthermore, the rotor core 31 is installed relative to the rotor flange 34, which improves the installation accuracy of the rotor core 31 and the processing efficiency of the rotor assembly 30. The rotor core 31 and the disc-shaped body 341 can be detachably connected, or the disc-shaped body 341 and the rotor core 31 can be welded to each other. The separate provision of the stopper 33 and the rotor flange 34 simplifies the processing of the rotor flange 34.

[0210] Optionally, the stopper 33 is fixed on the disc-shaped body 341. The stopper 33 can be welded and fixed on the disc-shaped body 341, or formed integrally with the disc-shaped body 341, thereby improving the integration of the rotor assembly 30, improving the structural stability of the stopper 33, and improving the stopping effect.

[0211] Furthermore, the stopper 33 is integrally formed with the disc-shaped main body 341. This simplifies assembly difficulty, improves the structural stability of the stopper 33, and enhances the stopping effect.

[0212] Optionally, a stopper 33 is attached to the outer circumferential surface of the rotor core 31, with one end of the stopper 33 connected to the outer edge of the disc-shaped body 341. The stopper 33 extends along the axial direction X of the rotor assembly 30 to cover the outer circumferential surface of the rotor core 31 on both sides of the rotor slot 311. This allows the rotor flange 34 to serve as an installation reference. When assembling the rotor core 31 and the disc-shaped body 341, the stopper 33 can be used as a positioning reference, thereby improving the alignment of the rotor core 31 and the disc-shaped body 341.

[0213] In one embodiment, the disc-shaped body 341 is provided with a plurality of first through-slots 342 connecting the two main surfaces of the disc-shaped body 341. The rotor core 31 is provided with a plurality of protrusions 312 corresponding to the first through-slots 342. Each protrusion 312 is inserted into a corresponding first through-slot 342. On the side of the disc-shaped body 341 facing away from the rotor core 31, the disc-shaped body 341 and the rotor core 31 are welded together along the mating edges of the first through-slots 342 and the protrusions 312. This reduces the difficulty of machining and assembling the rotor core 31 of the rotor assembly 30 and reduces electromagnetic losses in the rotor core 31. The number of protrusions 312 corresponds to the number of first through-slots 342. One protrusion 312 can be inserted into each first through-slot 342, and the disc-shaped body 341 and the stator core can be fixed together by welding, thereby facilitating the assembly of the rotor core 31 and the rotor flange 34 as a single component to the housing. The first through-slot 342 and the raised portion 312 have similar shapes. For example, both are square in structure. After the raised portion 312 is inserted into the first through-slot 342, the rotor core 31 and the rotor flange 34 are positioned relative to each other by the first through-slot 342 and the raised portion 312, facilitating welding and securing the disc-shaped body 341 and the stator and rotor core 31 along the mating edges of the first through-slot 342 and the raised portion 312. Because the rotor assembly of this embodiment and the stator assembly described above share similar fixing methods between the core and the rotor flange, the rotor assembly of this embodiment can employ various variations of the stator assembly described above.

[0214] See Figure 28, which is a schematic structural diagram of an embodiment of the rotor core provided in this application.

[0215] The rotor core 31 is formed by winding a strip of sheet material. A protrusion 3121 is provided on one edge of the strip. The strip is provided with a second through-groove 3122, located between the two edges of the strip and connecting the two main surfaces of the strip. The two edges of the strip form the first and second end faces of the rotor core 31 as the strip is wound. The protrusion 3121 forms the raised portion 312 as the strip is wound, and the second through-groove 3122 forms the rotor slot 311 as the strip is wound. Compared to traditional die-casting, the rotor core 31 in this embodiment can be formed more efficiently by winding the strip of sheet material. In addition, a plurality of protrusions 3121 are protrudingly provided on one side of the strip sheet, and the plurality of protrusions 3121 are arranged at predetermined intervals on one side of the strip sheet. After the strip sheet is wound to form the rotor core 31, the plurality of protrusions 3121 cooperate with the back of the stator core to form a protrusion 312, thereby facilitating the efficient forming of the protrusion 312; similarly, a plurality of second through-grooves 3122 can be provided at predetermined intervals on the other side of the strip sheet. After the strip sheet is wound to form the rotor core 31, the plurality of second through-grooves 3122 cooperate with the side of the rotor core 31 away from the protrusion 312 to form a rotor slot 311 for embedding the magnetic block 32, thereby facilitating the efficient forming of the rotor slot 311.

[0216] Referring to Figures 29-31, Figure 29 is a schematic structural diagram and a cross-sectional diagram of the second embodiment of the rotor assembly provided in this application. Figure 30 is a schematic disassembled diagram of one embodiment of the first rotor assembly in the second embodiment of the rotor assembly provided in this application, and Figure 31 is a schematic disassembled diagram of one embodiment of the second rotor assembly in the second embodiment of the rotor assembly provided in this application. Figure 29 (a) is a schematic structural diagram of the second embodiment of the rotor assembly, and Figure 29 (b) is a schematic cross-sectional diagram of Figure 29 (a) along the DD direction.

[0217] The rotor assembly 30 includes a first rotor component 30a and a second rotor component 30b. By assembling the first rotor component 30a and the second rotor component 30b to form the rotor assembly 30, when the rotor assembly 30 is used to form an axial flux motor, the output efficiency of the axial flux motor can be improved.

[0218] The first rotor assembly 30a includes a first rotor flange 34a and a first rotor core 31a. The first rotor flange 34a includes a first disc-shaped body 341a and a rotational shaft portion 35a disposed on the first disc-shaped body 341a. The first rotor core 31a is disposed on one major surface of the first disc-shaped body 341a and surrounds the rotational shaft portion 35a. The first disc-shaped body 341a can be disc-shaped, with both opposing side surfaces of the disc-shaped first disc-shaped body 341a defining major surfaces. The rotational shaft portion 35a can be located in the middle of the first disc-shaped body 341a. For example, the rotational shaft portion 35a can be coaxial with the first disc-shaped body 341a. The first rotor flange 34a can be fixedly connected to the first rotor core 31a, thereby simplifying assembly of the first rotor assembly 30a. Furthermore, the first rotor core 31a and the first rotor flange 34a can be integrated into the axial flux motor, thereby increasing the integration density of the axial flux motor.

[0219] The second rotor assembly 30b includes a second rotor flange 34b and a second rotor core 31b. The second rotor flange 34b includes a second disc-shaped body 341b and an axial hole portion 35b disposed in the second disc-shaped body 341b. The second rotor core 31b is disposed on one major surface of the second disc-shaped body 341b, and the axial hole portion 35b defines an axial hole 351b. The second disc-shaped body 341b can be disc-shaped, with both opposing surfaces of the disc-shaped second disc-shaped body 341b defining major surfaces. The axial hole portion 35b can be located in the middle of the second disc-shaped body 341b. For example, the axial hole portion 35b can be coaxial with the second disc-shaped body 341b. The second rotor flange 34b can be fixedly connected to the second rotor core 31b, thereby simplifying assembly of the second rotor assembly 30b. The second rotor core 31b and the second rotor flange 34b can be integrated into the axial flux motor, thereby improving the integration level of the axial flux motor.

[0220] The shaft portion 35a is inserted into the shaft hole 351b along the axial direction of the rotor assembly 30. The main surface of the first disc-shaped body 341a facing away from the first rotor core 31a and the main surface of the second disc-shaped body 341b facing away from the second rotor core 31b are in contact with each other and fixed relative to each other. In this manner, the first and second rotor cores 31a, 31b use the first and second rotor flanges 34a, 34b as the installation and positioning references, improving the positioning accuracy and assembly efficiency of the first and second rotor assemblies 30a, 30b during installation. Furthermore, the back-to-back connection of the first and second rotor assemblies 30a, 30b via the first and second rotor cores 31a, 31b reduces the difficulty of assembling the two rotor assemblies.

[0221] Optionally, one of the first disc-shaped body 341a and the second disc-shaped body 341b is welded to the other of the first disc-shaped body 341a and the second disc-shaped body 341b along its outer circumference. This simplifies the securing method of the two rotor assemblies and improves the securing effect. Furthermore, the first rotor flange 34a and the second rotor flange 34b are axially welded along their outer circumferences, improving the processing efficiency of the rotor assembly 30.

[0222] Furthermore, the outer circumferences of the first and second disc-shaped bodies 341a, 341b are aligned radially with each other in the rotor assembly 30. The first and second disc-shaped bodies 341a, 341b are welded to each other along the mating edges of their outer circumferences. This simplifies the securing method for the two rotor assemblies and improves the securing effect. The first and second disc-shaped bodies 341a, 341b can have the same radial dimensions. When the first and second disc-shaped bodies 341a, 341b are aligned, the outer circumferences of the first and second disc-shaped bodies 341a, 341b are aligned radially with each other in the rotor assembly 30. By aligning the outer circumferences of the first and second disc-shaped bodies 341a, 341b radially with each other, the radial dimensions of the rotor assembly 30 can be reduced. This also facilitates welding of the first and second disc-shaped bodies 341a, 341b along their outer circumferences, improving the processing efficiency of the rotor assembly 30.

[0223] Optionally, the shaft portion 35a and the shaft hole portion 35b are welded to each other along the edge of the shaft hole 351b at the end of the shaft hole portion 35b facing away from the first disc-shaped body 341a. When the shaft portion 35a is inserted into the shaft hole 351b along the axial direction X of the rotor assembly 30, a portion of the shaft portion 35a extends to the end of the shaft hole portion 35b facing away from the first disc-shaped body 341a. The outer circumferential surface of the shaft portion 35a located within the shaft hole 351b can mate with the inner wall surface of the shaft hole 351b, facilitating the welding of the shaft portion 35a and the shaft hole portion 35b along the edge of the shaft hole 351b. This axial welding of the shaft hole portion 35b and the shaft portion 35a improves the processing efficiency of the rotor assembly 30.

[0224] Furthermore, the shaft portion 35a is provided with a first annular platform 351a. A second annular platform 352b, surrounding the shaft hole 351b, is provided on the side of the shaft hole portion 35b facing away from the first disc-shaped body 341a. The second annular platform 352b is flush with the first annular platform 351a along the axial direction of the rotor assembly 30 and surrounds the first annular platform 351a. The shaft portion 35a and the shaft hole portion 35b are welded together along the mating edges of the first annular platform 351a and the second annular platform 352b. The radial dimension of the first annular platform 351a can be equal to or slightly smaller than the radial dimension of the second annular platform 352b to facilitate insertion of the shaft portion 35a into the shaft hole 351b. When the rotating shaft portion 35a is inserted into the shaft hole 351b, the first annular table 351a and the second annular table 352b are on the same plane, which facilitates the rotating shaft portion 35a and the shaft hole portion 35b to be welded and fixed along the matching edges of the first annular table 351a and the second annular table 352b, thereby improving the processing efficiency of the rotor assembly 30 and reducing the radial size of the rotor assembly 30.

[0225] In the second embodiment, the shaft portion 35a and the shaft hole portion 35b can be welded for fixation. In the third embodiment, other fixing methods can also be used. See Figures 32 and 33. Figure 32 is a schematic structural diagram and a cross-sectional diagram of the third embodiment of the rotor assembly provided by this application. Figure 33 is a disassembled schematic diagram of the third embodiment of the rotor assembly provided by this application. Figure a in Figure 32 is a schematic structural diagram of the third embodiment of the rotor assembly, and Figure b in Figure 32 is a cross-sectional diagram of Figure a in Figure 35 along the EE direction.

[0226] The shaft portion 35a includes an insertion portion 352a and a docking portion 353a. The insertion portion 352a is inserted into the shaft hole 351b. The docking portion 353a, projected along the axial direction of the rotor assembly 30, overlaps the shaft hole portion 35b. Multiple sets of fixing pairs 36 are provided on the docking portion 353a and the shaft hole portion 35b, securing the docking portion 353a and the shaft hole portion 35b relative to each other via the fixing pairs 36. This simplifies the securing method for the two rotor assemblies and improves the securing effect. The radial dimension of the docking portion 353a can be larger than that of the insertion portion 352a. When the insertion portion 352a is inserted into the shaft hole 351b, the docking portion 353a and the shaft hole portion 35b can form a face-to-face fit. The docking portions 353a and the shaft hole portion 35b thus restrain the shaft portion 35a and the shaft hole portion 35b in the radial direction of the rotor assembly 30. The multiple fixed matching pairs 36 can be arranged at equal intervals along the circumference of the rotor assembly 30. The multiple fixed matching pairs 36 can be interconnected through holes, and the rotating shaft portion 35a and the shaft hole portion 35b can be detachably connected by other components, thereby increasing the flexibility of the rotor assembly 30 and facilitating disassembly and maintenance of the rotor assembly 30. In other embodiments, the fixed matching pairs 36 can also be pin matching pairs or other matching pairs.

[0227] Furthermore, the fixed matching pair 36 includes a first fixing hole 354a provided on the docking portion 353a and a second fixing hole 353b provided on the axial hole portion 35b. The docking portion 353a and the axial hole portion 35b are fixed relative to each other by a fixing member 37 inserted into the first fixing hole 354a and the second fixing hole 353b. The first fixing hole 354a and the second fixing hole 353b of the same matching pair can be coaxially arranged. The first fixing hole 354a and the second fixing hole 353b can be threaded holes. The fixing member 37 can be a bolt. The number of fixing members 37 corresponds to the number of fixed matching pairs 36. At least one of the first fixing hole 354a and the second fixing hole 353b is a stepped hole. By inserting the fixing member 37 into the first fixing hole 354a and the second fixing hole 353b, the docking portion 353a and the axial hole portion 35b are detachably connected.

[0228] Optionally, in at least one set of fixed matching pairs 36, the first fixing hole 354a includes a first outer hole segment 3541a and a first inner hole segment 3542a that are connected to each other, the aperture of the first inner hole segment 3542a is larger than the aperture of the first outer hole segment 3541a, the second fixing hole 353b includes a second outer hole segment 3531b and a second inner hole segment 3532b that are connected to each other, the aperture of the second inner hole segment 3532b is larger than the aperture of the second outer hole segment 3531b, the first inner hole segment 3542a and the second inner hole segment 3532b are docked with each other, the rotor assembly 30 includes a positioning pin 38 inserted into the first inner hole segment 3542a and the second inner hole segment 3532b, and the fixing member 37 passes through the first outer hole segment 3541a, the positioning pin 38 and the second outer hole segment 3531b. The radial dimensions of the first inner bore section 3542a and the second inner bore section 3532b can be the same. During the installation of the docking portion 353a and the shaft hole portion 35b, a positioning pin 38 can be first placed in the first inner bore section 3542a or the second inner bore section 3532b. Then, based on the position of the positioning pin 38, the first fixing hole 354a and the second fixing hole 353b of the same fixed matching pair 36 are aligned. Finally, the fixing member 37 is inserted into the first fixing hole 354a and the second fixing hole 353b, thereby relatively fixing the shaft hole portion 35b and the docking portion 353a. Thus, the auxiliary positioning by the positioning pin 38 facilitates the relative fixing of the shaft hole portion 35b and the docking portion 353a, thereby improving the processing efficiency of the rotor assembly 30.

[0229] In this embodiment, to improve the limiting speed capability of the rotor assembly 30, stoppers may be provided on the outer circumferences of the first rotor assembly 30a and the second rotor assembly 30b. See Figures 34 and 35. Figure 34 is a schematic structural diagram and a cross-sectional diagram of the fourth embodiment of the rotor assembly provided in this application. Figure 35 is a disassembled schematic diagram of the fourth embodiment of the rotor assembly provided in this application. Figure 34 (b) is a schematic structural diagram of the fourth embodiment of the rotor assembly, and Figure 34 (a) is a cross-sectional diagram of Figure 34 (b) along the FF direction.

[0230] Optionally, the outer circumferences of the first disc-shaped body 341a and the second disc-shaped body 341b are flush with each other along the radial direction of the rotor assembly 30. The first rotor core 31a is provided with a first rotor slot 311a having a first open end located on the outer circumference of the first rotor core 31a. The first rotor assembly 30a further includes a first magnetic block 32a disposed within the first rotor slot 311a. The second rotor core 31b is provided with a second rotor slot 311b having a second open end located on the outer circumference of the second rotor core 31b. The second rotor assembly 30b further includes a second magnetic block 32b disposed within the second rotor slot 311b. The first and second rotor cores 31a, 31b may be annular to facilitate installation of the rotor assembly 30 in an axial flux motor. The first rotor slot 311a is defined on the outer circumference of the first rotor core 31a and extends radially toward the interior of the first rotor core 31a along the rotor assembly 30. The first open end of the first rotor slot 311a faces the outside of the first rotor core 31a, facilitating insertion of the first magnetic block 32a from the first open end of the first rotor core 31a into the first rotor slot 311a. Similarly, the second rotor slot 311b is defined on the outer circumference of the second rotor core 31b and extends radially toward the interior of the second rotor core 31b along the rotor assembly 30. The second open end of the second rotor slot 311b faces the outside of the second rotor core 31b, facilitating insertion of the second magnetic block 32b from the second open end of the second rotor core 31b into the second rotor slot 311b.

[0231] The rotor assembly 30 further includes an annular stopper 39, integrally disposed along the axial direction of the rotor assembly 30 and wound around the periphery of the first and second rotor cores 31a, 31b. This stops the rotor assembly 30 and simultaneously blocks the first and second open ends along the axial direction of the rotor assembly 30. The radial dimension of the inner circle of the annular stopper 39 is equal to or slightly larger than the radial dimension of the outer circumferences of the first and second rotor cores 31a, 31b, allowing the annular stopper 39 to surround and fit closely around the outer circumferences of the first and second rotor cores 31a, 31b. The annular stopper 39 is radially located outside the first and second rotor cores 31a, 31b and blocks the first and second open ends along the axial direction of the rotor assembly 30. The annular stopper 39 can be attached to the outer circumferential surface of the first rotor core 31a and the second rotor core 31b, and the first opening end and the second opening end can be covered by the annular stopper 39, so as to limit the first magnetic block 32a in the first rotor slot 311a and the second magnetic block 32b in the second rotor slot 311b through the annular stopper 39.

[0232] Through the above embodiment, the annular stopper 39 is used to limit the first magnetic block 32a in the first rotor slot 311a, and the second magnetic block 32b is limited in the second rotor slot 311b, so that the maximum speed capability of the rotor assembly 30 can be improved, and by integrating the annular stopper 39, the first magnetic block 32a, the second magnetic block 32b, the first rotor core 31a and the second rotor core 31b into the rotor assembly 30, the integration of the rotor assembly 30 can be improved and the size of the axial flux motor can be reduced.

[0233] It should be noted that in the embodiment of the integrated dual-rotor rotor assembly 30, both the first rotor assembly 30a and the second rotor assembly 30b may include the embodiment described above for the single rotor assembly 30. For example, the annular stopper 39 may be provided separately from the first rotor flange 34a and the second rotor flange 34b; or the annular stopper 39 may be integrally provided with the first rotor flange 34a or the second rotor flange 34b; or the annular stopper 39 may be welded to the first rotor flange 34a or the second rotor flange 34b. The first disc-shaped body 341a and the first rotor core 31a, as well as the second disc-shaped body 341b and the second rotor core 31b, are secured by welding using through-grooves and protrusions. Furthermore, the first rotor core 31a and the second rotor core 31b may each be formed by winding the strip-shaped sheet material described above.

[0234] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An axial flux motor, characterized in that: The axial flux motor includes a shell, a stator assembly, a rotor assembly and a partition assembly. The shell is used to form an accommodating space. The stator assembly and the rotor assembly are arranged in the accommodating space along the axial direction of the axial flux motor. The partition assembly includes a partition body, which is arranged between the stator assembly and the rotor assembly. The shell cooperates with the partition body to form a cooling space for accommodating coolant and the stator assembly. The coolant in the cooling space directly contacts the stator assembly.

2. The axial flux motor according to claim 1, characterized in that The shell includes an end plate portion, the inner end surface of the end plate portion is arranged toward the side of the stator assembly away from the rotor assembly, and the inner end surface of the end plate portion is spaced apart from the partition body along the axial direction to define the two side boundaries of the cooling space in the axial direction.

3. The axial flux motor according to claim 1 or 2, characterized in that: The housing includes two cylindrical parts nested along the radial direction of the axial flux motor. The two cylindrical parts are respectively sealed with the partition body. The cooling space is arranged in an annular shape.

4. The axial flux motor according to claim 3, characterized in that The two cylindrical portions include a first cylindrical portion and a second cylindrical portion arranged around the first cylindrical portion, the first cylindrical portion and the second cylindrical portion extend toward the stator assembly, the first cylindrical portion is for the rotating shaft portion of the rotor assembly to pass through, the partition body includes an inner ring matching portion and an outer ring matching portion arranged around the inner ring matching portion, wherein the inner ring matching portion is sealed in conjunction with the first cylindrical portion, and the outer ring matching portion is sealed in conjunction with the second cylindrical portion.

5. The axial flux motor according to claim 4, characterized in that The partition body is embedded in the interior of the second cylindrical part, and a sealing fit is formed between the outer circumferential surface of the outer ring matching part and the inner circumferential surface of the second cylindrical part, and / or a third cylindrical part is provided on the inner ring matching part, and the third cylindrical part is connected to the first cylindrical part to form a sealing fit between the two.

6. The axial flux motor according to claim 5, characterized in that The third cylindrical portion is connected to the periphery of the first cylindrical portion. The axial flux motor further includes a bearing disposed in the first cylindrical portion. The partition body includes an oil collecting plate. The oil collecting plate cooperates with the first cylindrical portion to form an oil storage tank.

7. The axial flux motor according to claim 6, characterized in that The oil collecting plate is connected to the third cylindrical portion and extends toward the inside of the third cylindrical portion along the radial direction of the axial flux motor.

8. The axial flux motor according to any one of claims 1 to 7, characterized in that: The stator assembly includes a stator core and a coil wound on the stator core. The stator core is provided with a plurality of stator slots, and the coil is embedded in the plurality of stator slots. The partition body includes a plurality of embedded ribs corresponding to the positions of the plurality of stator slots, and each of the embedded ribs is embedded in the corresponding stator slot.

9. The axial flux motor according to claim 8, characterized in that The shell includes a first cylindrical portion and a second cylindrical portion arranged around the first cylindrical portion, the first cylindrical portion and the second cylindrical portion extend toward the stator assembly, the first cylindrical portion is for the rotating shaft portion of the rotor assembly to pass through, the partition body includes an inner ring matching portion and an outer ring matching portion arranged around the inner ring matching portion, the inner ring matching portion is sealed with the first cylindrical portion, and the outer ring matching portion is sealed with the second cylindrical portion, the multiple stator slots and the multiple embedded ribs are respectively radially extended relative to the axial direction, and the multiple embedded ribs are respectively connected to the inner ring matching portion and / or the outer ring matching portion.

10. The axial flux motor according to claim 8 or 9, characterized in that: The partition body further includes a blocking plate for blocking gaps between the plurality of embedded ribs.

11. The axial flux motor according to any one of claims 4 to 7, 9 to 10, characterized in that: The inner ring matching portion and / or the outer ring matching portion are in sealing cooperation with the stator assembly.

12. The axial flux motor according to any one of claims 1 to 11, characterized in that: The partition assembly includes a reinforcement member, which is arranged in a cylindrical shape and supported on a side of the partition body away from the stator assembly. The rotor assembly is arranged in the reinforcement member.

13. The axial flux motor according to claim 12, characterized in that The reinforcement member is arranged to abut against the housing.

14. The axial flux motor according to any one of claims 1 to 13, characterized in that: The partition assembly is provided with a plurality of pressure relief holes arranged at intervals along the circumference of the axial flux motor.

15. The axial flux motor according to claim 14, characterized in that The rotor assembly and the partition body are spaced apart along the axial direction to form an air gap, and the pressure relief hole is used to connect the air gap with the external space of the partition assembly.

16. The axial flux motor according to any one of claims 1 to 15, characterized in that: The baffle assembly is further provided with a reflux hole, and the coolant that penetrates from the cooling space into the baffle assembly is discharged to the external space of the baffle assembly through the reflux hole.

17. The axial flux motor according to claim 16, characterized in that The partition assembly includes a reinforcement member, which is cylindrical and supported on a side of the partition body away from the stator assembly. The rotor assembly is arranged in the reinforcement member, and the return hole is arranged on the reinforcement member.

18. The axial flux motor according to claim 17, characterized in that The reinforcement is also provided with a plurality of pressure relief holes, which are arranged at intervals along the circumference of the axial flux motor at the edge of the reinforcement facing the partition body, and the return hole is centered relative to the two side edges of the reinforcement along the axial direction.

19. The axial flux motor according to any one of claims 1 to 18, characterized in that: The stator assembly includes a stator core and a coil wound on the stator core. The stator core is arranged in a ring shape. The coil protrudes from the opposite side annular surfaces of the stator core along the radial direction of the axial flux motor to form an inner ring coil portion and an outer ring coil portion. The inner ring coil portion and / or the outer ring coil portion are located in the cooling space, and the coolant in the cooling space directly contacts the inner ring coil portion and / or the outer ring coil portion.

20. The axial flux motor according to any one of claims 1 to 19, characterized in that: The shell includes an end plate portion, the inner end surface of the end plate portion is arranged toward the side of the stator assembly away from the rotor assembly, and a cooling channel is provided on the inner end surface of the end plate portion, the side of the partition body facing the end plate portion and / or the stator assembly, and the coolant in the cooling space flows along the cooling channel.

21. The axial flux motor according to any one of claims 1 to 20, characterized in that: The shell includes an end plate portion, the inner end surface of the end plate portion is arranged toward the side of the stator assembly away from the rotor assembly, and a cooling channel for the coolant to flow is provided on the inner end surface. The stator assembly cover is provided on at least a portion of the cooling channel, and the coolant flowing in the cooling channel directly contacts the stator assembly.

22. The axial flux motor according to claim 21, characterized in that The stator assembly includes a stator flange and a stator core. The stator flange includes a disc-shaped body. The stator core is attached and fixed to the main surface of the disc-shaped body on the side facing away from the end plate. The disc-shaped body covers at least a portion of the cooling channel. The coolant flowing in the cooling channel directly contacts the disc-shaped body.

23. The axial flux motor according to claim 22, characterized in that The stator assembly also includes a coil wound on the stator core, the stator core and the disc-shaped body are arranged in a ring shape, and the coil protrudes from the opposite side annular surfaces of the stator core in the radial direction of the axial flux motor to form an inner ring coil portion and an outer ring coil portion, and at least one of the inner ring coil portion and the outer ring coil portion is arranged to exceed the disc-shaped body in the radial direction of the axial flux motor or maintain a predetermined gap with the disc-shaped body in the axial direction of the axial flux motor, and the coolant is in direct contact with at least one of the inner ring coil portion and the outer ring coil portion.

24. The axial flux motor according to any one of claims 21 to 23, characterized in that: The cooling channel includes at least two circumferential channels and at least one radial channel. The at least two circumferential channels are arranged at intervals along the radial direction of the axial flux motor. The radial channel is arranged along the radial direction of the axial flux motor and is connected to the at least two circumferential channels.

25. The axial flux motor according to any one of claims 1 to 24, characterized in that: The stator assembly includes a first stator assembly and a second stator assembly spaced apart along the axial direction, the rotor assembly is located between the first stator assembly and the second stator assembly, the partition body includes a first partition body and a second partition body, the first partition body cooperates with the shell to form a first cooling space for accommodating the coolant and the first stator assembly, and the second partition body cooperates with the shell to form a second cooling space for accommodating the coolant and the second stator assembly.

26. The axial flux motor according to claim 25, characterized in that The partition assembly is provided with a communication channel, and the communication channel is used to connect the first cooling space and the second cooling space.

27. The axial flux motor according to claim 26, characterized in that The communication channel includes a first communication channel and a second communication channel, and the first communication channel and the second communication channel are arranged opposite to each other along the radial direction.

28. The axial flux motor according to claim 27, characterized in that The housing includes a first end plate portion and a second end plate portion spaced apart along the axial direction, the stator assembly and the rotor assembly are arranged between the first end plate portion and the second end plate portion along the axial direction, and a liquid inlet and a liquid outlet are provided on one of the first end plate portion and the second end plate portion, and the liquid inlet and the liquid outlet are respectively arranged opposite to the first connecting channel and the second connecting channel along the axial direction of the axial flux motor.

29. The axial flux motor according to any one of claims 26 to 28, characterized in that: The partition assembly also includes a reinforcement member and a channel member connected between the first partition body and the second partition body, the reinforcement member is cylindrical, the rotor assembly is arranged inside the reinforcement member, the channel member is arranged outside the reinforcement member, and the connecting channel is arranged on the channel member.

30. The axial flux motor according to any one of claims 1 to 29, characterized in that: The housing includes a first cylindrical portion, the rotating shaft portion of the rotor assembly is rotatably supported in the first cylindrical portion, and the first cylindrical portion at least partially overlaps with the stator assembly along the axial direction.

31. The axial flux motor according to any one of claims 1 to 30, characterized in that: The stator assembly and / or the rotor assembly include a flange and an iron core portion, the flange includes a disc-shaped body, the disc-shaped body is provided with a plurality of through grooves connecting the main surfaces on both sides of the disc-shaped body, the iron core portion is provided with a plurality of protrusions corresponding to the plurality of through grooves, the protrusions are inserted into the corresponding through grooves, and the disc-shaped body and the iron core portion are welded and fixed to each other along the matching edges of the through grooves and the protrusions.

32. The axial flux motor according to any one of claims 1 to 31, characterized in that: The rotor assembly includes a rotor core, a magnetic block and a stopper. The rotor core is provided with a rotor slot, and the rotor slot has an open end located on the outer peripheral surface of the rotor core. The magnetic block is arranged in the rotor slot. The stopper is located on the outside of the rotor core in the radial direction of the rotor assembly and blocks the open end along the axial direction of the rotor assembly.

33. The axial flux motor according to claim 32, characterized in that The stopper is an annular structure that surrounds the rotor core along the circumference of the rotor assembly. The rotor assembly also includes a rotor flange, which includes a disc-shaped body. The rotor core is fitted and fixed on one main surface of the disc-shaped body. The stopper is separately arranged from the rotor flange or is fixed on the disc-shaped body.

34. The axial flux motor according to any one of claims 1 to 33, characterized in that: The rotor assembly includes a first rotor assembly and a second rotor assembly. The first rotor assembly includes a first rotor flange and a first rotor core. The first rotor flange includes a first disc-shaped body and a rotating shaft portion arranged on the first disc-shaped body. The first rotor core is arranged on one main surface of the first disc-shaped body and is arranged around the rotating shaft portion. The second rotor assembly includes a second rotor flange and a second rotor core. The second rotor flange includes a second disc-shaped body and an axial hole portion arranged on the second disc-shaped body. The second rotor core is arranged on one main surface of the second disc-shaped body. The axial hole portion is provided with an axial hole. The rotating shaft portion is inserted into the axial hole along the axial direction of the rotor assembly. The main surface of the first disc-shaped body on the other side facing away from the first rotor core and the main surface of the second disc-shaped body on the other side facing away from the second rotor core are in contact with each other and fixed relative to each other.

35. The axial flux motor according to claim 34, characterized in that One of the first disk-shaped body and the second disk-shaped body is fixed to the other of the first disk-shaped body and the second disk-shaped body by welding along its outer circumference.

36. The axial flux motor according to claim 34 or 35, characterized in that At one end of the shaft hole portion facing away from the first disc-shaped body, the rotating shaft portion and the shaft hole portion are welded and fixed to each other along the edge of the shaft hole; or The rotating shaft portion includes an insertion portion and a docking portion, the insertion portion is inserted into the shaft hole, the docking portion is overlapped with the shaft hole portion along the axial projection of the rotor assembly, and multiple groups of fixed matching pairs are provided on the docking portion and the shaft hole portion, and the docking portion and the shaft hole portion are fixed relative to each other through the fixed matching pairs.

37. An electric device, characterized in that: The electric device comprises an axial flux motor as described in any one of claims 1-36.

38. A means of transport, characterized in that: The vehicle comprises an axial flux motor as claimed in any one of claims 1-36.

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