Axial motor, shell structure and axial motor assembling method

Abstract

The invention provides an axial motor, a shell structure and an axial motor assembling method, the axial motor comprises a shell, the shell comprises a side wall and a blocking wall, the blocking wall is arranged in a surrounding mode in the circumferential direction of the shell, the side wall is arranged on the outer side of the blocking wall in a surrounding mode, and a mounting cavity is formed between the side wall and the blocking wall; the stator assembly is arranged in the mounting cavity, the stator assembly is arranged on the inner side of the side wall in a surrounding mode, and a first filling gap is formed between the side wall and the stator assembly; and the heat-conducting glue layer is at least filled in the first filling gap, so that the side wall is connected with the stator assembly through the heat-conducting glue layer. And the heat-conducting glue layer is in contact with the stator assembly and the side wall of the shell to play a role in heat conduction, so that heat in the motor can be conveniently and quickly conducted to the shell for heat dissipation. The heat-conducting glue layer plays a role in connection and fixation and also plays a role in heat conduction, the structural characteristics of the motor are fully utilized, no extra heat dissipation device needs to be added for heat dissipation of the motor, the complexity of the manufacturing process is reduced, and the structure of the motor is simplified.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to an axial motor, a housing structure and an axial motor assembly method. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque as a power source for electrical appliances or various machines. According to the direction of the magnetic lines of force, motors can be divided into radial motors and axial motors. The magnetic lines of force of radial motors are along the radial direction of the motor, while the magnetic lines of force of axial motors are parallel to the direction of the rotating shaft.

[0003] Compared with radial motors, axial motors are smaller in size and have higher power density, which brings higher challenges to the heat dissipation of various components of axial motors during operation. At present, the heat dissipation methods of axial motors can be divided into air cooling, water cooling and oil cooling according to the cooling medium. These heat dissipation methods all require the installation of additional heat dissipation devices, which increases the design complexity of the motor. Summary of the invention

[0004] The present application provides an axial motor, a housing structure and an axial motor assembly method, which can improve the heat dissipation effect while simplifying the structure of the motor.

[0005] In a first aspect, the present application provides an axial motor, comprising:

[0006] The housing comprises a side wall and a blocking wall, wherein the blocking wall is disposed around the circumference of the housing, the side wall is disposed around the outside of the blocking wall, and a mounting cavity is formed between the side wall and the blocking wall;

[0007] A stator assembly is disposed in the installation cavity, the stator assembly is disposed around the inner side of the side wall, and a first filling gap is formed between the side wall and the stator assembly; and

[0008] A thermally conductive adhesive layer is filled at least in the first filling gap, so that the side wall is connected to the stator assembly through the thermally conductive adhesive layer.

[0009] In a second aspect, the present application further provides a housing structure, which is applied to an axial motor, and the housing structure includes:

[0010] A side wall is disposed around the circumference of the shell; and

[0011] A blocking wall, the blocking wall is arranged around the inner side of the side wall and is located in the space enclosed by the side wall, and a mounting cavity is formed between the blocking wall and the side wall, and the mounting cavity is used to mount the stator assembly of the axial motor;

[0012] Wherein, when the stator assembly is installed in the installation cavity, a first filling gap is formed between the side wall and the stator assembly, and the first filling gap is used to fill the thermal conductive adhesive layer.

[0013] In a third aspect, the present application further provides an axial motor assembly method, which is applied to the axial motor, wherein the axial motor includes a stator assembly, a rotor assembly and a housing, wherein the housing includes a side wall, a first end cover and a second end cover, wherein the side wall includes a first end and a second end oppositely arranged in the axial direction, wherein the first end defines a first opening, and the second end defines a second opening; the method includes:

[0014] Placing the side wall of the housing on a positioning fixture with the first opening of the side wall facing upward;

[0015] Placing a stator assembly in the side wall and supported by the positioning fixture, wherein the stator assembly and the side wall are spaced apart to form a first filling gap;

[0016] Injecting thermally conductive glue from the first opening so that the thermally conductive glue fills the first filling gap;

[0017] placing a first end cover on the first opening;

[0018] separating the side wall and the stator assembly from the positioning fixture;

[0019] Disposing the rotor assembly coaxially with the stator assembly;

[0020] The second end cover is disposed on the second opening of the side wall.

[0021] The present application provides an axial motor, a housing structure and an axial motor assembly method, wherein the housing of the axial motor includes a side wall and a barrier wall, and an installation cavity is formed between the side wall and the barrier wall, so that the stator assembly can be installed, and a first filling gap is formed between the stator assembly and the side wall, so that a thermal conductive adhesive layer can be filled in the first filling gap, and the thermal conductive adhesive layer is connected to the side wall and the stator assembly. In this way, under the connection effect of the thermal conductive adhesive layer, the stator assembly can be fixed to the side wall, and because the thermal conductive adhesive layer is in contact with the stator assembly and the side wall of the housing, it can play a role in heat conduction, so that the heat inside the motor can be more conveniently and quickly conducted to the housing for heat dissipation. The thermal conductive adhesive layer plays a role in both connection and fixing, and also plays a role in heat conduction, making full use of the structural characteristics of the motor itself, and there is no need to add an additional heat dissipation device to dissipate the heat of the motor, reducing the complexity of the manufacturing process and simplifying the structure of the motor, thereby achieving the purpose of improving the heat dissipation effect while simplifying the motor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0023] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0024] Figure 1 A schematic diagram of the structure of the axial motor provided in an embodiment of the present application.

[0025] Figure 2 A schematic diagram of the structure of the stator assembly and the rotor assembly provided in an embodiment of the present application.

[0026] Figure 3 for Figure 1 An exploded view of an axial motor is shown.

[0027] Figure 4 A cross-sectional view of a shell provided in an embodiment of the present application.

[0028] Figure 5 A cross-sectional view of an axial motor provided in an embodiment of the present application.

[0029] Figure 6 for Figure 1 A cross-section of an axial motor shown filled with thermal paste.

[0030] Figure 7 This is a schematic diagram of the first structure of the magnetic core provided in an embodiment of the present application.

[0031] Figure 8 An exploded view of a shell provided in an embodiment of the present application.

[0032] Fig. 9 for Figure 8 A schematic structural diagram of another perspective of the structure shown.

[0033] Fig.10 A schematic diagram of the second magnetic structure provided in an embodiment of the present application.

[0034] Fig.11 A schematic diagram of the structure of the side wall and stator assembly provided in an embodiment of the present application when positioned on a positioning fixture.

[0035] Fig.12 A flow chart of an axial motor assembly method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] The embodiments of the present application provide an axial motor, a housing structure and an axial motor assembly method, which can improve the heat dissipation effect while simplifying the structure of the motor. This will be described below with reference to the accompanying drawings.

[0038] It can be understood that in traditional motor structures, the motor is usually radial flux, and the effective magnetic field direction of the radial flux motor is radial, that is, the magnetic lines of force are along the radial direction of the motor. The stator of the radial flux motor is sleeved on the outside of the rotor, and the rotor rotates in the middle. The air gap surface between the stator and the rotor is a cylinder, and the magnetic lines of force are perpendicular to the air gap surface, and the magnetic lines of force are parallel to the diameter direction.

[0039] The air gap surface of the axial motor is flat, and the air gap magnetic field is axial, so it is also called a disc motor. In most disc motor structures, the stator and rotor are disc-shaped, and the air gap surface between the two is a plane perpendicular to the motor shaft. Its magnetic field lines are perpendicular to the air gap surface and parallel to the shaft direction. The axial motor has the characteristics of small size, light weight and high efficiency. The stator of the axial motor is generally a coil, and the rotor is a permanent magnet or a disc with a permanent magnet.

[0040] It should be noted that compared with radial motors, axial motors are small in size and have high power density. During operation, the heat dissipation of various components of axial motors is more challenging. Similar to traditional radial motors, the losses of axial motors are divided into copper loss, iron loss, mechanical loss, stray loss, etc. These losses are dissipated in the form of heat, which is mainly concentrated on the stator core. However, due to process limitations, the heat exchange efficiency between the stator core and the shell is not high. When the temperature is too high, on the one hand, it may cause the permanent magnet to demagnetize or even lose magnetism, resulting in a decrease in motor output. On the other hand, it will also accelerate the aging of the motor insulation material and reduce the operating reliability of the motor. Therefore, it is necessary to reasonably design the cooling structure of the axial motor and optimize the temperature distribution of the motor to ensure its long-term safe and reliable operation.

[0041] At present, the heat dissipation methods of axial motors can be divided into air cooling, water cooling and oil cooling according to the cooling medium. These heat dissipation methods all require the installation of additional heat dissipation devices, which increases the design complexity of the motor. For example, air cooling uses air as the heat transfer medium and cools the motor through convection heat dissipation. For example, fans and other equipment are installed on the motor to enhance air flow and strengthen the air cooling effect.

[0042] Water cooling and oil cooling are liquid cooling, which use water or cooling oil as the coolant, with the help of additional equipment such as water pumps or oil pumps to drive the coolant to circulate through the specially designed cooling channels inside the motor, absorb the heat generated inside the motor, and transfer it to equipment such as heat exchangers to complete the entire cooling process.

[0043] It can be seen from this that the current heat dissipation methods of axial motors all require the provision of additional heat dissipation devices, which increases the design complexity of the motor.

[0044] Based on this, see Figures 1 to 5 , Figure 1 This is a schematic diagram of the structure of the axial motor provided in the embodiment of the present application. Figure 2 A schematic diagram of the structure of the stator assembly and the rotor assembly provided in the embodiment of the present application, Figure 3 for Figure 1 An exploded view of the axial motor is shown, Figure 4 A cross-sectional view of a housing provided in an embodiment of the present application, Figure 5 A cross-sectional view of an axial motor provided in an embodiment of the present application. An embodiment of the present application provides an axial motor 100, which includes a housing 10, a stator assembly 20 and a rotor assembly 30. The stator assembly 20 and the rotor assembly 30 are located in the housing 10 and are coaxially arranged. It can be understood that the rotor assembly 30 includes a rotating shaft 31 and a rotor body 32. The rotating shaft 31 is rotatably connected to the housing 10. The rotor body 32 is connected to the rotating shaft 31 and is located on one side of the stator assembly 20 in the axial direction. It can be understood that the rotor body 32 can be a permanent magnet or a disc structure with a permanent magnet bonded thereto, and the stator assembly 20 can be an iron core with a coil winding 24 wound thereon. In this way, the rotor assembly 30 can be rotated relative to the stator assembly 20 under the action of the axial magnetic flux.

[0045] The housing 10 may include a side wall 11 and a barrier wall 12, wherein the barrier wall 12 is disposed around the circumference of the housing 10, the side wall 11 is disposed around the outside of the barrier wall 12 and is spaced from the barrier wall 12, and an installation cavity 13 is formed between the side wall 11 and the barrier wall 12, so that the stator assembly 20 can be installed. It can be understood that the stator assembly 20 is disposed in the installation cavity 13, and the stator assembly 20 is disposed around the outside of the barrier wall 12, or in other words, the stator assembly 20 is disposed around the inside of the side wall 11, and a first filling gap 131 is formed between the side wall 11 and the stator assembly 20. It can be understood that the side wall 11 includes a side wall surface 111 facing the stator assembly 20, and the stator assembly 20 includes an outer peripheral surface 21 facing the side wall surface 111, and a first filling gap 131 is formed between the side wall surface 111 and the outer peripheral surface 21.

[0046] Please also read Figure 6 , Figure 6 for Figure 1The axial motor shown is a cross-sectional view when it is filled with a thermally conductive adhesive layer. The axial motor 100 also includes a thermally conductive adhesive layer 40, which is filled in at least the first filling gap 131, so that the side wall 11 is connected to the stator assembly 20 through the thermally conductive adhesive layer 40. In this way, under the connecting action of the thermally conductive adhesive layer 40, the stator assembly 20 can be fixed to the side wall 11, and because the thermally conductive adhesive layer 40 is in contact with the stator assembly 20 and the side wall 11 of the housing 10, it can play a role in heat conduction, so that the heat inside the motor can be more conveniently and quickly transferred to the housing 10 for heat dissipation. The thermally conductive adhesive layer 40 plays a role in both connection and fixing, and also plays a role in heat conduction. This structure makes full use of the structural characteristics of the motor itself, and there is no need to add additional heat dissipation devices to dissipate the heat of the motor, which reduces the complexity of the manufacturing process and simplifies the structure of the motor, thereby achieving the purpose of improving the heat dissipation effect while simplifying the motor structure.

[0047] In order to improve the heat dissipation effect of the housing 10 , heat dissipation fins may be provided on the side wall 11 of the housing 10 to increase the heat dissipation efficiency of the housing 10 .

[0048] Please continue to read Figure 5 and Figure 6 A second filling gap 132 is formed between the stator assembly 20 and the barrier wall 12, and the heat conductive adhesive layer 40 is also filled in the second filling gap 132, so that the barrier wall 12 is connected to the stator assembly 20 through the heat conductive adhesive layer 40. It can be understood that since the stator assembly 20 is arranged around the barrier wall 12, the stator assembly 20 as a whole forms an annular structure, and therefore, the stator assembly 20 includes an inner peripheral surface 22 facing the barrier wall 12 and an outer peripheral surface 21 away from the inner peripheral surface 22, wherein the barrier wall 12 includes a barrier wall surface 121, and the barrier wall surface 121 faces the inner peripheral surface 22 of the stator assembly 20. It can be understood that a first filling gap 131 is formed between the outer peripheral surface 21 of the stator assembly 20 and the side wall surface 111 of the side wall 11, and a second filling gap 132 is formed between the inner peripheral surface 22 of the stator assembly 20 and the barrier wall surface 121 of the barrier wall 12.

[0049] In the embodiment of the present application, by filling the second filling gap 132 with the thermal conductive adhesive layer 40, and also filling the first filling gap 131, under the connecting action of the thermal conductive adhesive layer 40, the stator assembly 20 can be better fixed to the shell 10, and because the thermal conductive adhesive layer 40 is in contact with the stator assembly 20, the side wall 11 of the shell 10 and the blocking wall 12 of the shell 10, it can achieve a better heat conduction effect, so that the heat inside the motor can be more conveniently and quickly transferred to the shell 10 for heat dissipation.

[0050] It is also understandable that see Figure 7 Combined with Figure 2 , Figure 3 and Figure 5 , Figure 7 The first structural schematic diagram of the magnetic core provided in the embodiment of the present application. The stator assembly 20 includes a magnetic core 23 and a coil winding 24, wherein the magnetic core 23 includes a magnetic core body 231 and a plurality of stator teeth 232, the magnetic core body 231 is arranged around the barrier wall 12, and the plurality of stator teeth 232 are connected to the magnetic core body 231 and extend along the axial direction of the axial motor 100, so that a first filling gap 131 is formed between the plurality of stator teeth 232 and the side wall 11, and a second filling gap 132 is formed between the plurality of stator teeth 232 and the barrier wall 12.

[0051] A plurality of stator teeth 232 are spaced around the barrier wall 12, and it is understood that the coil winding 24 is wound around the stator teeth 232. The magnetic core 23 may be an iron core or other magnetically conductive materials, such as a Sendust core, a ferrite core, a manganese-zinc ferrite core, or a nickel-zinc ferrite core, etc., which is not limited in the present application.

[0052] Among them, a third filling gap 133 is formed between adjacent stator teeth 232, and the third filling gap 133 is connected to the first filling gap 131 and the second filling gap 132. The thermal conductive adhesive layer 40 is also filled in the third filling gap 133. It can be understood that when the thermal conductive adhesive layer 40 is filled in the first filling gap 131, the second filling gap 132 and the third filling gap 133, the thermal conductive adhesive layer 40 is also filled in the gap between the coils when the coil winding 24 is wound on the stator teeth 232. In this way, by filling the thermal conductive adhesive layer 40 in the first filling gap 131, the second filling gap 132 and the third filling gap 133, the heat conduction area can be greatly increased, so that the heat inside the motor can be more conveniently and quickly conducted to the housing 10 for heat dissipation, and the stator assembly 20 can also be more firmly fixed to the housing 10. Furthermore, by filling the thermally conductive adhesive layer 40 , the complexity of the manufacturing process is reduced, and there is no need to add an additional heat dissipation device to dissipate the heat of the motor, thereby simplifying the structure of the motor, thereby achieving the purpose of improving the heat dissipation effect while simplifying the motor structure.

[0053] Exemplarily, the thermally conductive adhesive layer 40 may be made of glue with a certain fluidity. When the glue is filled into the first filling gap 131, since the glue has a certain fluidity, the glue can flow from the first filling gap 131 to the third filling gap 133, and then flow from the third filling gap 133 to the second filling gap 132, until the first filling gap 131, the second filling gap 132 and the third filling gap 133 are fully filled.

[0054] Of course, it is understandable that the glue can also be filled into the second filling gap 132. Since the glue has a certain fluidity, the glue can flow from the second filling gap 132 to the third filling gap 133, and then flow from the third filling gap 133 to the first filling gap 131 until the first filling gap 131, the second filling gap 132 and the third filling gap 133 are filled.

[0055] Alternatively, when the fluidity of the glue is poor, the first filling gap 131 , the second filling gap 132 and the third filling gap 133 may be filled separately.

[0056] In some embodiments, in order to increase the bonding area, bonding strength and thermal conductivity area of ​​the thermal conductive adhesive layer 40, a groove may be provided on the side wall surface 111 of the side wall 11 facing the stator assembly 20, so that when the thermal conductive adhesive layer 40 is filled in the first filling gap 131, part of the thermal conductive adhesive layer 40 may be filled in the groove, thereby increasing the bonding area, bonding strength and thermal conductivity area of ​​the thermal conductive adhesive layer 40. Exemplarily, the groove may be a knurled structure.

[0057] It is understandable that a knurling structure may also be provided on the blocking wall surface 121 of the blocking wall 12 .

[0058] In order to more clearly illustrate the structure of the housing 10 , the specific structure of the housing 10 and its related components will be described in detail below with reference to the accompanying drawings.

[0059] In order to facilitate the assembly of the axial motor 100, the housing 10 can be configured as a split structure, see Figure 8 and Fig. 9 , Figure 8 An exploded view of a housing provided in an embodiment of the present application, Fig. 9 for Figure 8 A schematic diagram of the structure from another perspective of the structure shown. The housing 10 may include a side wall 11, a first end cover 14, and a second end cover 15. It can be understood that the side wall 11 is arranged around the axis of the axial motor 100 to form an annular structure. It can also be understood that the shape of the side wall 11 can be flexibly set as needed. For example, in some embodiments, the shape of the side wall 11 can be set to be roughly circular, elliptical, polygonal, etc.

[0060] Among them, the side wall 11 includes a first end 112 and a second end 113 which are axially opposite to each other. The first end 112 defines a first opening 114, and the second end 113 defines a second opening 115. It can be understood that the second opening 115 is axially opposite to the first opening 114, or in other words, the opening direction of the first opening 114 is along the axial direction of the axial motor 100, and the opening direction of the second opening 115 is along the axial direction of the axial motor 100.

[0061] The first end cover 14 is detachably connected to the first end portion 112, so that the first end cover 14 is covered on the first opening 114 when it is connected to the first end portion 112. When the first end cover 14 is connected to the first end portion 112, the blocking wall 12 is connected to the first end cover 14. The blocking wall 12 can be detachably connected to the first end cover 14, or the blocking wall 12 and the first end cover 14 can be integrally formed. For example, when the blocking wall 12 and the first end cover 14 are integrally formed, the blocking wall 12 is always connected to the first end cover 14 regardless of whether the first end cover 14 is connected to the first end portion 112. The blocking wall 12 is arranged around the axis of the axial motor 100. It can be understood that when the first end cover 14 is connected to the first end portion 112 to cover the first opening 114, an installation cavity 13 for installing the stator assembly 20 of the axial motor 100 is formed between the blocking wall 12 and the side wall 11.

[0062] The second end cover 15 is detachably connected to the second end portion 113 so that the second end cover 15 covers the second opening 115 when connected to the second end portion 113. Thus, the first end cover 14, the side wall 11 and the second end cover 15 together define an accommodation cavity, and the stator assembly 20 and the rotor assembly 30 are located in the accommodation cavity.

[0063] Among them, see Figure 6 , Figure 8 and Fig. 9 In order to facilitate the rotation of the rotor assembly 30 in the accommodating cavity, or in other words, to facilitate the rotation of the rotor assembly 30 relative to the stator assembly 20, a bearing seat 141 may be provided on the first end cover 14, and a bearing 142 is provided on the bearing seat 141. The rotating shaft 31 of the rotor assembly 30 is connected to the bearing 142, such as the rotating shaft 31 of the rotor assembly 30 is sleeved on the outer ring of the bearing 142, wherein, in order to facilitate the connection and removal of the rotating shaft 31, the rotating shaft 31 and the bearing 142 are transitionally matched. It can be understood that the blocking wall 12 is arranged around the bearing seat 141 and is spaced from the bearing seat 141, so that the rotating shaft 31 has enough space to be sleeved on the bearing 142 and rotate.

[0064] Among them, in order to facilitate the connection between the wires inside the axial motor 100 and the external wires, a through hole 1411 can be set in the bearing seat 141. It can be understood that the through hole 1411 passes through the bearing seat 141 to connect the inside of the shell 10 with the external environment. In this way, wiring can be carried out through the through hole 1411. Moreover, since the through hole 1411 is set, when a sensor is set on the first end cover 14, the through hole 1411 can leave an avoidance space for the sensor, which is also convenient for the transmission of the sensor signal.

[0065] Of course, it is understandable that wiring through holes may also be provided at other positions of the first end cover 14 to facilitate the connection between the wires inside the axial motor 100 and the wires outside.

[0066] It can also be understood that the first end cover 14 is detachably connected to the first end portion 112 to cover the first opening 114 , and the first end cover 14 and the first end portion 112 can be detachably connected by a first fastener.

[0067] For example, see Figure 4 , Figure 8 and Fig. 9 The first end cover 14 is provided with a first connection portion 143, the first connection portion 143 is provided with a first fastening hole 1431, the first end portion 112 of the side wall 11 is provided with a second connection portion 1121, the second connection portion 1121 is provided with a second fastening hole 11211, when the first end cover 14 is connected to the first end portion 112, the first fastening hole 1431 and the second fastening hole 11211 are coaxially arranged, when it is necessary to connect the first end cover 14 to the first end portion 112, the first fastener can be inserted into the first fastening hole 1431 and the second fastening hole 11211, so as to achieve the connection of the first end cover 14 to the first end portion 112. It can be understood that in order to facilitate disassembly, the first fastener can be a screw, and the screw is threadedly connected with the first fastening hole 1431 and the second fastening hole 11211. Of course, it is also possible that a part of the first fastener passes through the first fastening hole 1431 and is threadedly connected with the second fastening hole 11211.

[0068] In order to facilitate the positioning of the first end cover 14 on the first end 112 of the side wall 11, a positioning protrusion 1432 may be provided on the first connection portion 143, and a positioning groove 11212 may be provided on the second connection portion 1121. When the first end cover 14 is covered on the first end 112, the positioning protrusion 1432 is inserted into the positioning groove 11212, so that the first end cover 14 can be conveniently connected to the first end 112. In order to facilitate processing and save space, the positioning protrusion 1432 and the first fastening hole 1431 are coaxially arranged, and the positioning groove 11212 and the second fastening hole 11211 are coaxially arranged.

[0069] It can also be understood that the first connection portion 143 can be arranged in plurality, and the plurality of first connection portions 143 are arranged at circumferential intervals along the first end cover 14. Correspondingly, the second connection portion 1121 can also be arranged in plurality, and the plurality of second connection portions 1121 are arranged at circumferential intervals along the side wall 11, and one first connection portion 143 corresponds to one second connection portion 1121.

[0070] When the first end cover 14 is connected to the first end portion 112 to cover the first opening 114 , the stator assembly 20 may be connected to the first end cover 14 .

[0071] In order to facilitate the connection and heat conduction of the stator assembly 20, the thermally conductive adhesive layer 40 is also arranged between the stator assembly 20 and the first end cover 14, so that the stator assembly 20 is connected to the first end cover 14 through the thermally conductive adhesive layer 40, that is, the thermally conductive adhesive layer 40 is connected between the stator assembly 20 and the first end cover 14. In this way, under the connection effect of the thermally conductive adhesive layer 40, the stator assembly 20 can be firmly connected to the first end cover 14, and the thermally conductive adhesive layer 40 can also conduct the heat of the stator assembly 20 to the first end cover 14 for heat dissipation. For example, before the first end cover 14 is connected to the first end 112, the thermally conductive adhesive layer 40 can be applied to the side of the first end cover 14 facing the stator assembly 20. When the first end cover 14 is connected to the first end 112 to cover the first opening 114, the thermally conductive adhesive layer 40 can be connected to the side of the stator assembly 20 facing the first end cover 14.

[0072] Among them, Fig. 9 As shown, a glue overflow groove 144 is provided on one side of the first end cover 14 facing the stator assembly 20, so that when the first end cover 14 is connected to the first end portion 112 and bonded to the stator assembly 20 through the thermal conductive adhesive layer 40, excess thermal conductive adhesive layer 40 can overflow into the glue overflow groove 144. It can be understood that the glue overflow groove 144 can be an annular structure, and the glue overflow groove 144 is arranged around the barrier wall 12.

[0073] In some embodiments, in order to make the stator assembly 20 more firmly connected to the first end cover 14, refer to Figures 2 to 5 Combined with Fig. 9 , the stator assembly 20 is provided with a first connection hole 25, and the first end cover 14 is provided with a second connection hole 145 coaxially arranged with the first connection hole 25, and the first connection hole 25 and the second connection hole 145 are used for the first connection member to pass through so as to fix the stator assembly 20 to the first end cover 14. It can be understood that when the first end cover 14 is connected to the first end 112 to cover the first opening 114, and the stator assembly 20 is located in the installation cavity 13, the first connection member can be passed through the first connection hole 25 and the second connection hole 145 to fix the stator assembly 20 to the first end cover 14. It can also be understood that, in order to facilitate disassembly, the first connection member can be a screw, and the screw is threadedly connected with the first connection hole 25 and the second connection hole 145. Of course, it is also possible that a part of the first connection member passes through the first connection hole 25 and is threadedly connected with the second connection hole 145. After the first connector is assembled between the stator assembly 20 and the first end cover 14 , the mechanical connection can prevent the risk of the stator assembly 20 falling off due to failure of the thermal conductive adhesive layer 40 at an excessively high temperature.

[0074] Among them, the first connection hole 25 can be set in plurality, and the plurality of first connection holes 25 can be arranged at circumferential intervals along the stator assembly 20. Correspondingly, the second connection hole 145 can also be set in plurality, and the plurality of second connection holes 145 are arranged at circumferential intervals along the first end cover 14, and one second connection hole 145 corresponds to one first connection hole 25.

[0075] Exemplarily, the first connection hole 25 can penetrate the stator tooth 232 and the core body 231 of the stator assembly 20 along the axial direction of the axial motor 100. A first connection hole 25 can be correspondingly provided for each stator tooth 232. Of course, in some other embodiments, a plurality of first connection holes 25 can also be correspondingly provided for each stator tooth 232, and the present application does not limit this. After the first connector is assembled between the stator assembly 20 and the first end cover 14, the mechanical connection better limits the axial movement of the stator assembly 20 and can prevent deformation of a single stator tooth 232.

[0076] In order to further improve the connection stability between the stator assembly 20 and the first end cover 14, please refer to Fig.10 , Fig.10 A second structural schematic diagram of the magnetism provided in the embodiment of the present application. A slot 26 may also be provided on the side of the stator assembly 20 facing the first end cover 14, such as providing a slot 26 on the side of the magnetic core 23 of the stator assembly 20 facing the first end cover 14, and providing a latch hole at a position of the first end cover 14 corresponding to the slot 26, and the latch hole and the slot 26 are provided correspondingly, so that a latch can be inserted into the latch hole and the slot 26 to achieve mechanical locking between the stator assembly 20 and the first end cover 14. Exemplarily, the slot 26 may be a dovetail slot.

[0077] In some embodiments, in order to fully utilize the characteristics of the thermal conductive adhesive layer 40 so that the stator assembly 20 can be more firmly installed in the housing 10, please refer to Figures 4 to 6 The side wall surface 111 of the side wall 11 of the housing 10 facing the stator assembly 20 includes a first end 1111 and a second end 1112, the first end 1111 is closer to the first end cover 14 than the second end 1112, and the side wall surface 111 is inclined relative to the stator assembly 20 in the direction from the second end 1112 to the first end 1111 and away from the stator assembly 20. That is, along the direction parallel to the axis of the axial motor 100 and toward the first end cover 14, the aperture formed by the side wall 11 gradually increases.

[0078] It can be understood that when the thermally conductive adhesive layer 40 is filled in the first filling gap 131, the side wall surface 111 of the side wall 11 is inclined, so that the thermally conductive adhesive layer 40 is roughly triangular in shape. With this design, when the thermally conductive adhesive layer 40 expands due to heat, it will be restricted by the structure of the inclined side wall surface 111, and the thermally conductive adhesive layer 40 will press the stator assembly 20 more tightly in the direction of the first end cover 14, so as to press the stator assembly 20 against the first end cover 14.

[0079] Since the second end 1112 along the side wall surface 111 is inclined toward the first end 1111 of the side wall surface 111, and the side wall surface 111 is inclined toward the direction away from the stator assembly 20, in the first filling gap 131, the closer to the first end cover 14, the larger the gap of the first filling gap 131, or the first filling gap 131 is at a large end near the first opening 114, and the first filling gap 131 is at a small end away from the first opening 114. Since the gap of the first filling gap 131 is relatively large near the first opening 114, at this time, when the first end cover 14 has not yet covered the first opening 114, it is convenient to inject the thermal conductive adhesive layer 40 into the first filling gap 131. It can also be known from this that the housing 10 is arranged in a split manner, that is, the first end cover 14 is detachably connected to the first end 112 of the side wall 11, which can facilitate the filling of glue, that is, when the first end cover 14 has not yet covered the first opening 114, the large end of the first filling gap 131 can be exposed to facilitate the filling of glue.

[0080] It can also be understood that, due to the inclined side wall surface 111, the first filling gap 131 is at a large end near the first opening 114, and the first filling gap 131 is at a small end far away from the first opening 114. At this time, even if the gap of the first filling gap 131 at the small end is set to be very small, due to the existence of the large end of the first filling gap 131, there is no need to worry about the problem of not being able to inject glue into the first filling gap 131. That is, when the thickness of the side wall 11 is certain, the first filling gap 131 can be made as small as possible, so that the axial motor 100 can be miniaturized.

[0081] In some embodiments, see Figure 4 and Figure 5 When the stator assembly 20 is accommodated in the space enclosed by the side wall 11, in order to position the stator assembly 20 in the axial direction, a first positioning portion 116 may be provided at one end of the side wall 11 away from the first end cover 14. The first positioning portion 116 is used to abut against a side of the stator assembly 20 that is axially away from the first end cover 14 to position the stator assembly 20. It can be understood that the first positioning portion 116 cooperates with the first end cover 14 to prevent the stator assembly 20 from moving in the axial direction, and also prevent the risk of the stator assembly 20 falling off after the failure of the first connector and the thermal conductive adhesive layer 40.

[0082] Exemplarily, the stator teeth 232 of the stator assembly 20 are wound with the coil winding 24 , and a portion of the coil winding 24 may abut against the first positioning portion 116 , thereby achieving the positioning of the stator assembly 20 .

[0083] In some embodiments, in order to make the stator assembly 20 more firmly fixed, please refer to Figures 3 to 6 , a glue hole 117 radially penetrating to the installation cavity 13 may be provided on the side wall 11, and when the first filling gap 131 is filled with the thermally conductive glue layer 40, part of the thermally conductive glue layer 40 is located in the glue hole 117. In this way, the part of the thermally conductive glue layer 40 located in the glue hole 117 can form a structure similar to a reinforcing rib, and when the stator assembly 20 is subjected to a large attraction force from the magnet of the rotor assembly 30, the thermally conductive glue layer 40 located in the glue hole 117 can play a role of limiting and tightening, so that the stator assembly 20 can be fixed more firmly.

[0084] It is understandable that when filling the first filling gap 131 with glue, the glue hole 117 needs to be sealed first, for example, the glue hole 117 can be sealed with a tape to prevent the glue from overflowing from the glue hole 117. It is also understandable that since the glue hole 117 also needs to be provided with a thermal conductive glue layer 40, when the glue hole 117 is sealed, only the outer opening of the glue hole 117 is sealed, rather than partially filling and sealing the glue hole 117, so that the thermal conductive glue layer 40 in the first filling gap 131 can partially flow into the glue hole 117 to form a reinforcing rib structure.

[0085] It can also be understood that the glue hole 117 can be provided in plurality, and the plurality of glue holes 117 are arranged at intervals along the circumference of the side wall 11 .

[0086] Among them, Figure 3 As shown, after the stator assembly 20 and the rotor assembly 30 are installed, the second end cover 15 can be detachably connected to the second end 113 of the side wall 11 to cover the second opening 115. For example, the second end cover 15 can be detachably connected to the second end 113 by a second fastener.

[0087] For example, see Figure 4 , Figure 8 and Fig. 9The second end cover 15 is provided with a third connection portion 151, and the third connection portion 151 is provided with a third fastening hole 1511. The second end portion 113 of the side wall 11 is provided with a fourth connection portion 1131, and the fourth connection portion 1131 is provided with a fourth fastening hole 11311. When the second end cover 15 is connected to the second end portion 113, the third fastening hole 1511 and the fourth fastening hole 11311 are coaxially arranged. When the second end cover 15 needs to be connected to the second end portion 113, the second fastener can be inserted into the third fastening hole 1511 and the fourth fastening hole 11311, so as to realize the connection of the second end cover 15 to the second end portion 113. It can be understood that in order to facilitate disassembly, the second fastener can be a screw, and the screw is threadedly connected with the third fastening hole 1511 and the fourth fastening hole 11311. Of course, it is also possible that a part of the second fastener passes through the third fastening hole 1511 and is threadedly connected with the fourth fastening hole 11311.

[0088] It can also be understood that the third connection portion 151 can be arranged in plurality, and the plurality of third connection portions 151 are arranged at circumferential intervals along the second end cover 15. Correspondingly, the fourth connection portion 1131 can also be arranged in plurality, and the plurality of fourth connection portions 1131 are arranged at circumferential intervals along the side wall 11, and one third connection portion 151 corresponds to one fourth connection portion 1131.

[0089] It is also understandable that Figure 4 As shown, in order to facilitate processing and assembly, the second connecting portion 1121 and the fourth connecting portion 1131 on the side wall 11 can be integrally formed into a whole, and the second fastening hole 11211 and the third fastening hole 1511 are coaxially arranged, or the second fastening hole 11211 and the third fastening hole 1511 can be connected into one fastening hole.

[0090] Please continue to read Figure 3 and Figure 4 In order to facilitate the positioning of the second end cover 15 to the second end 113 of the side wall 11, the second end 113 of the side wall 11 is provided with a limiting portion 1132 protruding along the side where the second end cover 15 is located. The limiting portion 1132 is arranged around the second opening 115. When the second end cover 15 is covered on the second opening 115, the inner wall of the second end cover 15 abuts against the limiting portion 1132, thereby realizing the positioning of the second end cover 15.

[0091] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front and back) are only used to explain the relative position relationship and movement of the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0092] On the other hand, the embodiment of the present application also provides an axial motor assembly method, which is used to assemble and form the above-mentioned axial motor 100. Fig.11 As shown, Fig.11 The schematic diagram of the structure of the side wall and the stator assembly provided in the embodiment of the present application when positioned on the positioning fixture. When filling the thermal conductive glue, the positioning fixture 50 is required to position the parts of the axial motor 100. The positioning fixture 50 includes a side wall 11 for supporting the housing 10 and a bearing portion 51 for the stator assembly 20. Please refer to Fig.12 , Fig.12 A flowchart of an axial motor assembly method provided in an embodiment of the present application. The axial motor assembly method includes:

[0093] 101. Place the side wall 11 of the housing 10 on the positioning fixture 50, such as on the bearing portion 51 of the positioning fixture 50, and make the first opening 114 of the side wall 11 face upward. The first opening 114 facing upward can facilitate the injection of thermal conductive glue.

[0094] 102 . Place the stator assembly 20 in the side wall 11 and support it with the positioning fixture 50 . The stator assembly 20 and the side wall 11 are spaced apart to form a first filling gap 131 .

[0095] 103. Inject thermally conductive glue from the first opening 114 to fill the first filling gap 131. After the thermally conductive glue is cured, a thermally conductive glue layer 40 can be formed. It can be understood that when the side wall 11 is provided with a glue hole 117, before filling the first filling gap 131 with glue, the glue hole 117 needs to be sealed first, for example, the glue hole 117 can be sealed with a tape to prevent the glue from overflowing from the glue hole 117.

[0096] It can also be understood that a third filling gap 133 is formed between adjacent stator teeth 232 in the stator assembly 20. When the stator assembly 20 is placed in the side wall 11 and supported by the positioning fixture 50, a second filling gap 132 is formed between the stator assembly 20 and the barrier wall 12, and the third filling gap 133 communicates with the first filling gap 131 and the second filling gap 132. In this way, injecting thermal conductive glue from the first opening 114 includes:

[0097] The thermal conductive glue is injected from the first opening 114 to fill the first filling gap 131, the second filling gap 132 and the third filling gap 133. It is understandable that the thermal conductive glue can be glue with a certain fluidity. When the glue fills the first filling gap 131, since the glue has a certain fluidity, the glue can flow from the first filling gap 131 to the third filling gap 133, and then flow from the third filling gap 133 to the second filling gap 132, until the first filling gap 131, the second filling gap 132 and the third filling gap 133 are fully filled.

[0098] Of course, it is understandable that the glue can also be filled into the second filling gap 132. Since the glue has a certain fluidity, the glue can flow from the second filling gap 132 to the third filling gap 133, and then flow from the third filling gap 133 to the first filling gap 131 until the first filling gap 131, the second filling gap 132 and the third filling gap 133 are filled.

[0099] Alternatively, when the fluidity of the glue is poor, the first filling gap 131 , the second filling gap 132 and the third filling gap 133 may be filled separately.

[0100] 104. The first end cover 14 is covered on the first opening 114. For example, the first end cover 14 is provided with a first connection portion 143, the first connection portion 143 is provided with a first fastening hole 1431, the first end portion 112 of the side wall 11 is provided with a second connection portion 1121, the second connection portion 1121 is provided with a second fastening hole 11211, the first fastening hole 1431 and the second fastening hole 11211 are coaxially arranged, when the first end cover 14 needs to be covered on the first opening 114, the first end cover 14 can be connected to the first end portion 112, and at this time, the first fastener can be inserted into the first fastening hole 1431 and the second fastening hole 11211, so as to realize the connection of the first end cover 14 to the first end portion 112. It can be understood that, in order to facilitate disassembly, the first fastener can be a screw, and the screw is threadedly connected with the first fastening hole 1431 and the second fastening hole 11211. Of course, a portion of the first fastener may pass through the first fastening hole 1431 and then be threadedly connected to the second fastening hole 11211 .

[0101] Before the first end cover 14 is covered on the first opening 114, thermal conductive glue may be applied to the side of the first end cover 14 facing the stator assembly 20. Thus, when the first end cover 14 is covered on the first opening 114, a thermal conductive glue layer 40 may be formed between the first end cover 14 and the stator assembly 20.

[0102] 105. Separate the side wall 11 and the stator assembly 20 from the positioning fixture 50. This facilitates the subsequent installation of the rotor assembly 30.

[0103] 106. The rotor assembly 30 and the stator assembly 20 are coaxially arranged. For example, the bearing 142 is sleeved on the bearing seat 141 on the first end cover 14 , and the rotating shaft 31 of the rotor assembly 30 is connected to the bearing 142 .

[0104] Wherein, when the stator assembly 20 is provided with a first connection hole 25, and the first end cover 14 is provided with a second connection hole 145 coaxially arranged with the first connection hole 25, before the rotor assembly 30 is coaxially arranged with the stator assembly 20, the assembly method further includes:

[0105] The first connecting member is inserted into the first connecting hole 25 and the second connecting hole 145 to fix the stator assembly 20 to the first end cover 14 .

[0106] 107. The second end cover 15 is covered on the second opening 115 of the side wall 11. For example, the second end cover 15 is provided with a third connection portion 151, the third connection portion 151 is provided with a third fastening hole 1511, the second end portion 113 of the side wall 11 is provided with a fourth connection portion 1131, the fourth connection portion 1131 is provided with a fourth fastening hole 11311, and the third fastening hole 1511 and the fourth fastening hole 11311 are coaxially arranged. When the second end cover 15 needs to be covered on the second opening 115 of the side wall 11, the second end cover 15 can be connected to the second end portion 113, and at this time, the second fastener can be inserted into the third fastening hole 1511 and the fourth fastening hole 11311, so as to realize the connection of the second end cover 15 to the second end portion 113. It can be understood that, in order to facilitate disassembly, the second fastener can be a screw, and the screw is threadedly connected with the third fastening hole 1511 and the fourth fastening hole 11311. Of course, a portion of the second fastener may pass through the third fastening hole 1511 and then be threadedly connected to the fourth fastening hole 11311 .

[0107] As described above, the embodiment of the present application configures the shell 10 into a three-section structure consisting of a first end cover 14, a side wall 11 and a second end cover 15, and combined with the specific structural design of the first end cover 14, the side wall 11 and the second end cover 15, as well as the above-mentioned assembly sequence, it is possible to use the thermal conductive adhesive layer 40 to fill all gaps between the stator assembly 20 and the shell 10, increase the thermal conductivity and improve the connection stability of the stator assembly 20, so that the heat inside the axial motor 100 can be more conveniently and quickly conducted to the shell 10 for heat dissipation.

[0108] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0109] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0110] The axial motor, housing structure and axial motor assembly method provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An axial motor, It is characterized in that include: The housing comprises a side wall and a blocking wall, wherein the blocking wall is disposed around the circumference of the housing, the side wall is disposed around the outside of the blocking wall, and a mounting cavity is formed between the side wall and the blocking wall; A stator assembly is arranged in the installation cavity, the stator assembly is arranged around the inner side of the side wall, and a first filling gap is formed between the side wall and the stator assembly; and A thermally conductive adhesive layer is filled at least in the first filling gap, so that the side wall is connected to the stator assembly through the thermally conductive adhesive layer.

2. The axial motor according to claim 1, It is characterized in that A second filling gap is formed between the stator assembly and the barrier wall, and the heat conductive adhesive layer is also filled in the second filling gap, so that the barrier wall is connected to the stator assembly through the heat conductive adhesive layer.

3. The axial motor according to claim 2, It is characterized in that The stator assembly comprises: A magnetic core, comprising a magnetic core body and a plurality of stator teeth, wherein the magnetic core body is arranged around the blocking wall, and the plurality of stator teeth are connected to the magnetic core body and extend along the axial direction of the axial motor, so that the first filling gap is formed between the plurality of stator teeth and the side wall, and the second filling gap is formed between the plurality of stator teeth and the blocking wall; the plurality of stator teeth are spaced around the blocking wall, and a third filling gap is formed between adjacent stator teeth, and the third filling gap connects the first filling gap and the second filling gap; and A coil winding, wound around the stator teeth; Wherein, the thermal conductive adhesive layer is also filled in the third filling gap.

4. The axial motor according to claim 1, It is characterized in that A groove is arranged on the side wall surface of the side wall facing the stator assembly, and part of the heat conductive adhesive layer is located in the groove.

5. The axial motor according to claim 1, It is characterized in that The side wall comprises a first end portion, the first end portion defines a first opening, and the opening direction of the first opening is along the axial direction of the axial motor; The housing further comprises a first end cover, which is detachably connected to the first end portion so that the first end cover covers the first opening when connected to the first end portion; Wherein, when the first end cover is connected to the first end portion, the stator assembly and the blocking wall are both connected to the first end cover.

6. The axial motor according to claim 5, It is characterized in that The thermally conductive adhesive layer is also disposed between the stator assembly and the first end cover, so that the stator assembly is connected to the first end cover through the thermally conductive adhesive layer.

7. The axial motor according to claim 5 or 6, It is characterized in that The stator assembly is provided with a first connecting hole, and the first end cover is provided with a second connecting hole coaxially arranged with the first connecting hole. The first connecting hole and the second connecting hole are used for a first connecting member to pass through so as to fix the stator assembly to the first end cover.

8. The axial motor according to claim 5, It is characterized in that The side wall surface of the side wall facing the stator assembly includes a first end and a second end, the first end is closer to the first end cover than the second end, and the side wall surface is inclined relative to the stator assembly in a direction away from the stator assembly along the direction from the second end toward the first end.

9. The axial motor according to any one of claims 1 to 6, It is characterized in that The side wall is provided with a glue hole which penetrates radially to the mounting cavity, and part of the thermal conductive glue layer is located in the glue hole.

10. The axial motor according to claim 5, It is characterized in that The axial motor further comprises a rotor assembly, which is coaxially arranged with the stator assembly and can rotate relative to the stator assembly; The side wall further includes a second end portion, the second end portion defines a second opening, and the second opening is disposed opposite to the first opening; The housing further comprises a second end cover, the second end cover being detachably connected to the second end portion so that the second end cover is disposed on the second opening when connected to the second end portion; The first end cover, the side wall and the second end cover together define an accommodating cavity, and the stator assembly and the rotor assembly are located in the accommodating cavity.

11. A housing structure, It is characterized in that Applied to an axial motor, the housing structure comprises: A side wall is disposed around the circumference of the shell; and A blocking wall, the blocking wall is arranged around the inner side of the side wall and is located in the space enclosed by the side wall, and a mounting cavity is formed between the blocking wall and the side wall, and the mounting cavity is used to mount the stator assembly of the axial motor; Wherein, when the stator assembly is installed in the installation cavity, a first filling gap is formed between the side wall and the stator assembly, and the first filling gap is used to fill the thermal conductive adhesive layer.

12. The housing structure according to claim 11, It is characterized in that The side wall comprises a first end portion and a second end portion which are arranged opposite to each other in the axial direction, the first end portion defines a first opening, and the second end portion defines a second opening; a first end cover, the first end cover being detachably connected to the first end portion, so that when the first end cover is connected to the first end portion, the first opening is covered; when the first end cover is connected to the first end portion, the blocking wall is connected to the first end cover; and The second end cover is detachably connected to the second end portion so that the second end cover covers the second opening when connected to the second end portion.

13. The housing structure according to claim 12, It is characterized in that A first positioning portion is disposed at one end of the side wall away from the first end cover, and the first positioning portion is used to position the stator assembly.

14. The housing structure according to claim 12, It is characterized in that The first end cover is provided with a second connection hole, and the second connection hole is used for a first connection member to pass through so as to fix the stator assembly to the first end cover.

15. The housing structure according to claim 12, It is characterized in that The side wall surface of the side wall facing the stator assembly includes a first end and a second end, the first end is closer to the first end cover than the second end, and the side wall surface is inclined relative to the stator assembly in a direction away from the stator assembly along the direction from the second end toward the first end.

16. The housing structure according to any one of claims 11 to 15, It is characterized in that The side wall is provided with a glue hole which penetrates radially to the mounting cavity. When the first filling gap is filled with a thermally conductive glue layer, a portion of the thermally conductive glue layer is located in the glue hole.

17. A method for assembling an axial motor, It is characterized in that Applied to an axial motor, the axial motor comprises a stator assembly, a rotor assembly and a housing, the housing comprises a side wall, a first end cover and a second end cover, the side wall comprises a first end and a second end oppositely arranged in the axial direction, the first end defines a first opening, and the second end defines a second opening; the method comprises: Placing the side wall of the housing on a positioning fixture with the first opening of the side wall facing upward; Placing a stator assembly in the side wall and supported by the positioning fixture, wherein the stator assembly and the side wall are spaced apart to form a first filling gap; Injecting thermally conductive glue from the first opening so that the thermally conductive glue fills the first filling gap; placing a first end cover on the first opening; separating the side wall and the stator assembly from the positioning fixture; Disposing the rotor assembly coaxially with the stator assembly; The second end cover is disposed on the second opening of the side wall.

18. The axial motor assembly method according to claim 17, It is characterized in that A third filling gap is formed between adjacent stator teeth in the stator assembly, and when the stator assembly is placed in the side wall and supported by the positioning fixture, a second filling gap is formed between the stator assembly and the barrier wall, and the third filling gap communicates with the first filling gap and the second filling gap; The injecting of thermally conductive glue from the first opening comprises: Thermally conductive glue is injected from the first opening to fill the first filling gap, the second filling gap, and the third filling gap with the thermally conductive glue.

19. The axial motor assembly method according to claim 17, It is characterized in that Before the first end cover is disposed on the first opening, the method further comprises: Apply thermal conductive glue on a side of the first end cover facing the stator assembly.

20. The axial motor assembly method according to claim 17, It is characterized in that The stator assembly is provided with a first connecting hole, and the first end cover is provided with a second connecting hole coaxially arranged with the first connecting hole; Before the rotor assembly is coaxially arranged with the stator assembly, the method further comprises: A first connecting member is inserted into the first connecting hole and the second connecting hole to fix the stator assembly to the first end cover.

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