Yoke-free axial flux motor

Abstract

The invention discloses a yoke-free axial magnetic flux motor, and relates to the technical field of motors, the yoke-free axial magnetic flux motor comprises a rotor disc and a rotor magnetic pole, the rotor disc is fixedly connected with a rotating shaft through a flange plate and is located at two sides of a stator in the axial direction, and a first interval exists between the rotor disc and the stator; the rotor magnetic pole is connected to one side, facing the stator, of the rotor disc, the rotor magnetic pole comprises a plurality of magnetic pole modules uniformly arranged in the circumferential direction of the rotor disc, the magnetic pole modules protrude into the first interval and are separated from the stator to form an air gap, and the adjacent magnetic pole modules are separated to form an airflow channel communicated with the air gap; when the magnetic pole module rotates around the axis of the rotating shaft, air in the airflow channel can be driven to flow out, so that a negative pressure environment is formed in the air gap and the cooling pipeline of the stator, and external cooling air is driven to enter the cooling pipeline of the stator for cooling. Heat generated by the motor can be dissipated efficiently, and the problem that heat in an axial magnetic flux motor in the prior art is not easy to dissipate is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a yokeless axial flux motor. Background Technology

[0002] Yokeless axial flux motors have attracted much attention due to their high torque density and high efficiency. Their typical structure is a dual-rotor, single-stator configuration. However, existing yokeless axial flux motor technologies have several drawbacks. For example, heat dissipation of the stator in axial flux motors mainly relies on the contact area with the stator coils. However, the heat dissipation area in contact with the stator coils cannot guarantee efficient heat dissipation. Oil cooling can lead to oil mist and leakage, potentially posing safety hazards. Water cooling can result in water leakage, which can reduce motor insulation in severe cases. This can lead to motor burnout; the rotor core is generally a wound structure, and the back of the core is only fixed by laser welding after winding, which is prone to deformation and has poor reliability; the tooth groove part is prone to misalignment during the core winding process, making manufacturing difficult and resulting in a low yield; the rotor magnets, rotor core and rotor support are mainly fixed by adhesive bonding, but the adhesive content between the magnets and the core and between the core and the support cannot be guaranteed, resulting in weak bonding. At the same time, during long-term operation of the rotor, the adhesive ages and its performance deteriorates, causing the magnets to be poorly bonded and posing a risk of falling off.

[0003] Therefore, how to provide a yokeless axial flux motor to at least partially improve the above-mentioned drawbacks is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a yokeless axial flux motor that can efficiently dissipate the heat generated by the motor, effectively improving the problem of heat dissipation in existing axial flux motors.

[0005] To achieve the above objectives, the present invention provides a yokeless axial flux motor, comprising:

[0006] The rotor disc is fixedly connected to the shaft via a flange and is located on both sides of the stator axial direction, with a first gap between the rotor disc and the stator;

[0007] The rotor magnetic pole is connected to the side of the rotor disk facing the stator. The rotor magnetic pole includes a number of magnetic pole modules evenly arranged around the rotor disk. The magnetic pole modules protrude into the first interval and are spaced apart from the stator to form an air gap. Adjacent magnetic pole modules are spaced apart to form an airflow channel communicating with the air gap.

[0008] When the magnetic pole module rotates around the axis of the rotating shaft, it can drive the gas in the airflow channel to flow out, creating a negative pressure environment in the air gap and the stator cooling pipes, which is used to drive external cooling air into the stator cooling pipes for cooling.

[0009] In one possible implementation, the rotor disk has a groove on the side facing the stator. The grooves are evenly distributed along the circumference of the rotor disk, and each groove corresponds to a magnetic pole module, for mounting the magnetic pole module onto the rotor disk.

[0010] In one possible implementation, the magnetic pole module is provided with a radially extending first through hole;

[0011] The rotor poles also include:

[0012] The upper pressure plate is connected to the side of the magnetic pole module away from the rotating shaft, and the upper pressure plate is provided with a second through hole coaxially arranged with the first through hole;

[0013] The lower pressure plate is connected to the side of the magnetic pole module facing the rotating shaft, and the lower pressure plate is provided with a third through hole coaxially arranged with the first through hole;

[0014] A tie rod is sequentially connected to a third through hole, a first through hole, and a second through hole arranged coaxially to connect the lower pressure plate, the magnetic pole module, and the upper pressure plate, and is used to limit the relative movement of the lower pressure plate, the magnetic pole module, and the upper pressure plate in the axial direction.

[0015] In one possible implementation, the groove has an upper rectangular hole and a lower rectangular hole on the side facing the stator. The upper rectangular hole is used for one end of the upper pressure plate to be inserted axially to limit the radial movement of the upper pressure plate, and the lower rectangular hole is used for one end of the lower pressure plate to be inserted axially to limit the radial movement of the lower pressure plate.

[0016] In one possible implementation, the outer circumferential surface of the rotor disk away from the shaft is further provided with a first fixing hole that communicates with the upper rectangular hole and extends radially. The first fixing hole is used for connecting the first fixing member to press the upper pressure plate located in the upper rectangular hole in the radial direction.

[0017] In one possible implementation, the rotor disk on the side opposite to the stator is also provided with a second fixing hole that communicates with the groove and extends axially.

[0018] The magnetic pole module is provided with clearance holes that correspond one-to-one with the second fixing holes and communicate with the first through holes;

[0019] The tie rod is provided with a third fixing hole that corresponds one-to-one with the second fixing hole;

[0020] The second fixing member is sequentially inserted through the second fixing hole, the clearance hole and the third fixing hole to restrict the relative movement of the tie rod and the rotor disc.

[0021] In one possible implementation, the device further includes a housing and an end cover. The housing is located circumferentially to the stator and is fixedly connected to the stator. The end cover is connected to both sides of the housing in the axial direction and is located on the side of the rotor disk away from the stator. The end cover has axially extending air outlets evenly arranged in the circumferential direction. The air outlets are connected to the airflow channel and are used to discharge the gas in the airflow channel to the side of the end cover away from the rotor disk.

[0022] In one possible implementation, the housing is uniformly provided with radially extending air inlets in the circumferential direction. The air inlets are used to communicate with the cooling pipes of the stator, so as to allow cooling air to enter into the cooling pipes of the stator.

[0023] In one possible implementation, the magnetic pole module includes a magnetic pole box and a magnet. The magnetic pole box is formed by stacking self-adhesive magnetic pole laminations and has a fourth through hole extending radially for accommodating the magnet.

[0024] In one possible implementation, the side of the magnetic pole box facing the stator has an arc-shaped structure.

[0025] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects: the rotor magnetic poles are designed as modular magnetic pole modules, and the magnetic pole modules are evenly arranged in the circumferential direction of the rotor disk. The magnetic pole modules protrude from the side of the rotor disk facing the stator. The magnetic pole modules of the rotor magnetic poles can serve as both the excitation function of the motor rotor magnetic poles and the function of fan blades. When the magnetic pole modules of the rotor magnetic poles rotate around the axis of the rotating shaft, the gas in the airflow channel is thrown out under the action of centrifugal force, so that a negative pressure environment is formed in the air gap and the cooling pipes of the stator. Under the action of pressure difference, the external cooling air is drawn into the cooling pipes of the stator for cooling. After carrying away the heat of the stator, it enters the air gap and airflow channel and is discharged. This enables the heat generated by the motor to be dissipated efficiently, effectively improving the problem that the heat in the axial flux motor in the prior art is not easy to dissipate. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the yokeless axial flux motor provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of gas flow in a yokeless axial flux motor provided in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the rotor magnetic poles mounted on the rotor disk according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the rotor disk provided in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the magnetic pole module provided in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the first magnetic pole piece provided in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the second magnetic pole piece provided in an embodiment of the present invention.

[0034] in:

[0035] 100-rotor disc, 110-groove, 120-upper rectangular hole, 130-lower rectangular hole, 140-first fixing hole, 150-second fixing hole, 160-mounting surface;

[0036] 200-Flange;

[0037] 300-spindle;

[0038] 400-Stator;

[0039] 500-Rotor magnetic pole, 510-Magnetic pole module, 511-First through hole, 512-Allowing hole, 513-Magnetic pole box, 514-Magnet, 515-First magnetic pole lamination, 516-Second magnetic pole lamination, 517-Fourth through hole, 520-Upper pressure plate, 521-Second through hole, 530-Lower pressure plate, 531-Third through hole, 540-Pull rod, 541-Third fixing hole;

[0040] 600 - First fastener;

[0041] 700 - Second fastener;

[0042] 800 - Casing, 810 - Air inlet;

[0043] 900 - End cap, 910 - Air outlet;

[0044] 1000-Bearing. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of this invention, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this invention.

[0048] The purpose of this invention is to provide a yokeless axial flux motor that can efficiently dissipate the heat generated by the motor, effectively improving the problem of heat dissipation in existing axial flux motors.

[0049] It should be noted that in this embodiment, the axial direction is based on the axial direction of the rotating shaft, that is, the axial direction refers to the direction in which the rotation axis of the rotating shaft extends or the direction parallel to the direction in which the rotation axis of the rotating shaft extends. In this embodiment, the radial direction is based on the radial direction of the rotating shaft, that is, the radial direction refers to the direction in which the rotation axis of the rotating shaft extends perpendicularly, so as to facilitate a clear understanding of the content of this solution.

[0050] Please see Figures 1 to 7To achieve the above objectives, the present invention provides a yokeless axial flux motor, comprising a rotor disk 100 and rotor poles 500. The rotor disk 100 and rotor poles 500 constitute the rotor. The rotor disk 100 is fixedly connected to the rotating shaft 300 via a flange 200 and is located on both sides of the stator 400 in the axial direction. There is a first gap between the rotor disk 100 and the stator 400. It can be understood that during motor assembly, the bearing 1000 and the rotating shaft 300 are first installed on the stator 400, with the outer circle of the bearing 1000 installed on the inner ring of the stator 400, and the inner circle of the bearing 1000 heat-fitted onto the rotating shaft 300. Then, the flange 200 and the rotor poles 500 are installed onto the rotating shaft 300. The rotor disk 100 has a ring-shaped structure, and the inner ring of the rotor disk 100 has a mounting surface 160 with a first mounting hole. The flange 200 has corresponding mounting holes. The second mounting hole connects the corresponding first and second mounting holes via a connector to achieve the connection between the rotor disk 100 and the flange 200. The first and second mounting holes can be threaded holes, and the connector can be a bolt, as long as the above purpose is achieved. The rotor magnetic pole 500 is connected to the side of the rotor disk 100 facing the stator 400. The rotor magnetic pole 500 includes a plurality of magnetic pole modules 510 evenly arranged around the rotor disk 100. The magnetic pole modules 510 protrude into the first interval and are spaced apart from the stator 400 to form an air gap. Adjacent magnetic pole modules 510 are spaced apart to form an airflow channel communicating with the air gap. When the magnetic pole modules 510 rotate around the axis of the rotating shaft 300, they can drive the gas in the airflow channel to flow out, so that a negative pressure environment is formed in the air gap and the cooling pipe of the stator 400, which is used to drive external cooling air into the cooling pipe of the stator 400 for cooling.

[0051] The rotor magnetic pole 500 is designed as a modular magnetic pole module 510, and the magnetic pole modules 510 are evenly arranged in the circumference of the rotor disk 100. The magnetic pole modules 510 protrude from the side of the rotor disk 100 facing the stator 400. The magnetic pole modules 510 of the rotor magnetic pole 500 can serve as both the excitation function of the motor rotor magnetic pole 500 and the function of fan blades. When the magnetic pole modules 510 of the rotor magnetic pole 500 rotate around the axis of the rotating shaft 300, the gas in the airflow channel is thrown out under the action of centrifugal force, creating a negative pressure environment in the air gap and the cooling pipes of the stator 400. Under the action of pressure difference, the external cooling air is drawn into the cooling pipes of the stator 400 for cooling, and the heat of the stator 400 is carried away and discharged into the air gap and airflow channel. This enables the heat generated by the motor to be dissipated efficiently, effectively improving the problem of heat dissipation in axial flux motors in the prior art.

[0052] In one possible implementation, the magnetic pole module 510 is provided with a radially extending first through hole 511; the rotor magnetic pole 500 further includes an upper pressure plate 520, a lower pressure plate 530, and a pull rod 540. The upper pressure plate 520 is connected to the side of the magnetic pole module 510 facing away from the rotating shaft 300, and the upper pressure plate 520 is provided with a second through hole 521 coaxially arranged with the first through hole 511; the lower pressure plate 530 is connected to the side of the magnetic pole module 510 facing the rotating shaft 300, and the lower pressure plate 530 is provided with a third through hole 531 coaxially arranged with the first through hole 511; the pull rod 540 is sequentially connected to the coaxially arranged third through hole 531, first through hole 511, and second through hole 521 to connect the lower pressure plate 530, the magnetic pole module 510, and the upper pressure plate 520, and to limit the relative axial movement of the lower pressure plate 530, the magnetic pole module 510, and the upper pressure plate 520.

[0053] It is understood that the cross-sections of the third through hole 531, the first through hole 511, and the second through hole 521 perpendicular to their own extension direction are all rectangular, and preferably the rectangular cross-sectional dimensions of the third through hole 531, the first through hole 511, and the second through hole 521 are consistent, so that the rectangular pull rod 540 with the same cross-sectional dimensions can pass through the third through hole 531, the first through hole 511, and the second through hole 521 to realize the connection of the lower pressure plate 530, the magnetic pole module 510, and the upper pressure plate 520. The bottom of the pull rod 540 is provided with a transverse protrusion, which is used to abut against the side of the lower pressure plate 530 away from the magnetic pole module 510 to ensure the accurate radial position of the pull rod 540.

[0054] In one possible implementation, the rotor disk 100 has a groove 110 on the side facing the stator 400. The grooves 110 are evenly distributed along the circumference of the rotor disk 100, and each groove 110 corresponds to a magnetic pole module 510 for mounting the magnetic pole module 510 onto the rotor disk 100. The groove 110 has an upper rectangular hole 120 and a lower rectangular hole 130 on the side facing the stator 400. The axial length of the upper pressure plate 520 and the lower pressure plate 530 is slightly greater than the axial length of the magnetic pole module 510. The upper rectangular hole 120 is used for inserting one end of the upper pressure plate 520 axially to limit the upper pressure. The radial movement of plate 520 is restricted by the lower rectangular hole 130 for one end of lower pressure plate 530 to be inserted axially. The rotor disk 100 is also provided with a first fixing hole 140 on the outer circumferential surface opposite to the rotating shaft 300, which communicates with the upper rectangular hole 120 and extends radially. The first fixing hole 140 is used for the connection of the first fixing member 600, so that one end of the first fixing member 600 facing the upper pressure plate 520 is in close contact with the upper pressure plate 520, so as to press the upper pressure plate 520 located in the upper rectangular hole 120 radially and press the upper pressure plate 520 onto the rotor disk 100. The first fixing hole 140 can be a threaded hole, and the first fixing member 600 can be a bolt, so as to facilitate the installation and disassembly of the first fixing member 600 and adjust the pressure of the first fixing member 600 on the upper pressure plate 520 according to actual needs. The countersunk threaded hole corresponding to the first fixing hole 140 can be added to the upper pressure plate 520 according to actual needs to improve the pressure and fixing effect on the upper pressure plate 520.

[0055] Furthermore, the rotor disk 100 is provided with a second fixing hole 150 on the side opposite to the stator 400, which communicates with the groove 110 and extends axially; the magnetic pole module 510 is provided with a clearance hole 512 that corresponds one-to-one with the second fixing hole 150 and communicates with the first through hole 511; the tie rod 540 is provided with a third fixing hole 541 that corresponds one-to-one with the second fixing hole 150; the second fixing member 700 is sequentially inserted through the second fixing hole 150, the clearance hole 512 and the third fixing hole 541 to limit the relative movement of the tie rod 540 and the rotor disk 100. The second fixing hole 150 and the third fixing hole 541 can be threaded holes, and the second fixing member 700 can be bolted, so as to facilitate the installation and disassembly of the second fixing member 700. Preferably, at least two third fixing holes 541 are provided on the same tie rod 540, which are spaced apart in the radial direction. Correspondingly, the magnetic pole module 510 is provided with a clearance hole 512 that corresponds one-to-one with the third fixing hole 541, so as to avoid the installation of the second fixing member 700. The same tie rod 540 can be effectively fixed by connecting at least two second fixing members 700. The magnetic pull between the rotor magnetic pole 500 and the stator 400 is borne by the tie rod 540, and the centrifugal force on the magnetic pole module 510 is borne by the upper pressure plate 520 and the lower pressure plate 530, which can ensure high mechanical reliability. The tie rod 540 is made of high-strength structural steel, which can effectively prevent the influence of eddy current loss on the rotor magnetic pole 500, and ensure the fixing strength of the magnetic pole module 510, thereby increasing the reliability of the rotor magnetic pole 500 operation.

[0056] In one possible implementation, the system further includes a housing 800 and two end caps 900. The housing 800 is located circumferentially to the stator 400 and is fixedly connected to the stator 400. The housing 800 extends axially. The end caps 900 are connected to both sides of the housing 800 axially, and are located on the side of the rotor disk 100 opposite to the stator 400. That is, one end cap 900 is located on the side of one rotor disk 100 opposite to the stator 400, and the other end cap 900 is located on the side of the other rotor disk 100 opposite to the stator 400. Air outlets 910 extending axially are evenly arranged circumferentially on the end caps 900. The number and size of the air outlets 910 can be adjusted according to actual needs. The air outlets 910 are connected to the airflow channel and are used to discharge the gas in the airflow channel to the side of the end cover 900 away from the rotor disk 100. A filter screen is provided at the air outlets 910 to prevent external dust from entering the motor. Air inlets 810 are evenly arranged radially extending on the circumference of the housing 800. The air inlets 810 are used to connect with the cooling pipes of the stator 400 and are used to allow cooling air to enter the cooling pipes of the stator 400. A filter screen is also provided at the air inlets 810 to prevent external dust from entering the motor.

[0057] In one possible implementation, the magnetic pole module 510 includes a magnetic pole box 513 and a magnet 514. The magnetic pole box 513 is formed by stacking self-adhesive magnetic pole pieces. The magnetic pole box 513 has a radially extending fourth through hole 517 for accommodating the magnet 514. The magnetic pole pieces include a first magnetic pole piece 515 and a second magnetic pole piece 516. The first magnetic pole piece 515 has a complete first through hole 511 and a complete fourth through hole 517. The second magnetic pole piece 516 has a first through hole 511 with an opening and a complete fourth through hole 517. The aforementioned clearance hole 512 can be formed by stacking the second magnetic pole piece 516. That is, the first magnetic pole piece 515 corresponds to the part of the magnetic pole box 513 without clearance hole 512, and the second magnetic pole piece 516 corresponds to the part of the magnetic pole box 513 with clearance hole 512. In order to ensure the positive magnetic field... The magnetic pole box 513 has an arc-shaped structure on the side facing the stator 400. That is, the first magnetic pole lamination 515 and the second magnetic pole lamination 516 are both designed to be arc-shaped near the air gap. After the magnetic pole box 513 is stacked and formed, the magnet 514 is placed into the fourth through hole 517 of the magnetic pole box 513 and then potted with epoxy resin. Finally, the magnetic pole module 510 is magnetized to avoid damage to the surface coating of the magnet 514 during assembly, improve the reliability of the magnet 514 operation, and prevent the magnet 514 from breaking during assembly, thus reducing the loss of the magnet 514 during assembly.

[0058] In summary, by dividing the rotor pole 500 into several individual pole modules 510, and using self-adhesive pole laminations to form the pole box 513, the problems of easy deformation and poor reliability during core winding are effectively solved. Furthermore, by standardizing the pole lamination specifications to form uniform pole modules 510, the high manufacturing difficulty of existing axial flux motor cores is effectively addressed, and the cost of mass production of cores can be significantly reduced. Simultaneously, the modular design of the rotor pole 500 allows the pole modules 510 to function as both excitation devices for the motor rotor poles 500 and fan blades. When the pole modules 510 rotate, the gaps between them throw cooling air out of the motor end cover 900. Due to pressure, cooling air is drawn from outside the stator 400 into the stator 400, passes through cooling pipes in the stator 400, and finally exits through the pole modules 510 into the end cover 900, effectively solving the heat dissipation problem of yokeless axial flux motors.

[0059] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A yokeless axial flux motor, characterized in that, include: The rotor disk (100) is fixedly connected to the rotating shaft (300) via a flange (200) and is located on both sides of the stator (400) in the axial direction. There is a first gap between the rotor disk (100) and the stator (400). The rotor magnetic pole (500) is connected to the side of the rotor disk (100) facing the stator (400). The rotor magnetic pole (500) includes a plurality of magnetic pole modules (510) evenly arranged in the circumferential direction of the rotor disk (100). The magnetic pole modules (510) protrude into the first interval and are spaced apart from the stator (400) to form an air gap. Adjacent magnetic pole modules (510) are spaced apart to form an airflow channel communicating with the air gap. When the magnetic pole module (510) rotates around the axis of the rotating shaft (300), it can drive the gas in the airflow channel to flow out, so that a negative pressure environment is formed in the air gap and the cooling pipe of the stator (400), which is used to drive external cooling air into the cooling pipe of the stator (400) for cooling.

2. The yokeless axial flux motor according to claim 1, characterized in that, The rotor disk (100) has a groove (110) on the side facing the stator (400). The groove (110) is evenly arranged along the circumference of the rotor disk (100), and the groove (110) corresponds one-to-one with the magnetic pole module (510) for the magnetic pole module (510) to be installed on the rotor disk (100).

3. The yokeless axial flux motor according to claim 2, characterized in that, The magnetic pole module (510) is provided with a radially extending first through hole (511). The rotor magnetic poles (500) also include: The upper pressure plate (520) is connected to the side of the magnetic pole module (510) away from the rotating shaft (300), and the upper pressure plate (520) is provided with a second through hole (521) coaxially arranged with the first through hole (511). The lower pressure plate (530) is connected to the side of the magnetic pole module (510) facing the rotating shaft (300), and the lower pressure plate (530) is provided with a third through hole (531) coaxially arranged with the first through hole (511). A pull rod (540) is sequentially connected to the third through hole (531), the first through hole (511), and the second through hole (521) arranged coaxially to connect the lower pressure plate (530), the magnetic pole module (510), and the upper pressure plate (520), and to limit the relative axial movement of the lower pressure plate (530), the magnetic pole module (510), and the upper pressure plate (520).

4. The yokeless axial flux motor according to claim 3, characterized in that, The groove (110) has an upper rectangular hole (120) and a lower rectangular hole (130) on the side facing the stator (400). The upper rectangular hole (120) is used for one end of the upper pressure plate (520) to be inserted axially to limit the radial movement of the upper pressure plate (520). The lower rectangular hole (130) is used for one end of the lower pressure plate (530) to be inserted axially to limit the radial movement of the lower pressure plate (530).

5. The yokeless axial flux motor according to claim 4, characterized in that, The rotor disk (100) is provided with a first fixing hole (140) on the outer circumferential surface away from the rotating shaft (300), which communicates with the upper rectangular hole (120) and extends radially. The first fixing hole (140) is used for the connection of the first fixing member (600) to press the upper pressure plate (520) located in the upper rectangular hole (120) radially.

6. The yokeless axial flux motor according to claim 3, characterized in that, The rotor disk (100) is also provided with a second fixing hole (150) on the side opposite to the stator (400), which communicates with the groove (110) and extends axially. The magnetic pole module (510) is provided with a clearance hole (512) that corresponds one-to-one with the second fixing hole (150) and communicates with the first through hole (511). The pull rod (540) is provided with a third fixing hole (541) that corresponds one-to-one with the second fixing hole (150); The second fixing member (700) is sequentially inserted into the second fixing hole (150), the clearance hole (512) and the third fixing hole (541) to restrict the relative movement of the pull rod (540) and the rotor disk (100).

7. The yokeless axial flux motor according to any one of claims 1-6, characterized in that, It also includes a housing (800) and an end cover (900). The housing (800) is located circumferentially to the stator (400) and is fixedly connected to the stator (400). The end cover (900) is connected to both sides of the housing (800) in the axial direction and is located on the side of the rotor disk (100) away from the stator (400). The end cover (900) is uniformly provided with an axially extending air outlet (910) in the circumferential direction. The air outlet (910) is connected to the airflow channel and is used to allow the gas in the airflow channel to be discharged to the side of the end cover (900) away from the rotor disk (100).

8. The yokeless axial flux motor according to claim 7, characterized in that, The housing (800) is uniformly provided with radially extending air inlets (810) in the circumferential direction. The air inlets (810) are used to communicate with the cooling pipes of the stator (400) to allow cooling air to enter the cooling pipes of the stator (400).

9. The yokeless axial flux motor according to any one of claims 1-6, characterized in that, The magnetic pole module (510) includes a magnetic pole box (513) and a magnet (514). The magnetic pole box (513) is formed by stacking self-adhesive magnetic pole sheets. The magnetic pole box (513) is provided with a fourth through hole (517) extending radially. The fourth through hole (517) is used to accommodate the magnet (514).

10. The yokeless axial flux motor according to claim 9, characterized in that, The side of the magnetic pole box (513) facing the stator (400) has an arc-shaped structure.

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