An axial flux motor

Abstract

The application provides an axial flux motor, and relates to the technical field of axial flux motors.The axial flux motor provided by the application comprises a shell, a stator arranged in the shell, two stators arranged in parallel and coaxially along an axial direction, a rotor arranged in the shell and located between the two stators, the rotor comprising a plurality of permanent magnets and a rotor disc, the permanent magnets being arranged along the circumferential side of the rotor disc, an output shaft connected to one end of the rotor disc and extending out of the shell, the output shaft being configured to rotate under the drive of the rotor disc, and a sealing assembly comprising two sealing members, the two sealing members being connected to two iron cores respectively, a containing cavity being formed between the two sealing members, and the permanent magnets being located in the containing cavity.By arranging the permanent magnets in the containing cavity, the cooling oil is prevented from entering the containing cavity, so that the problem that the permanent magnets will stir the oil violently when rotating, generate eddy current resistance and cause additional energy loss is avoided.

Description

Technical Field

[0001] This invention relates to the field of axial flux motor technology, and more specifically to an axial flux motor. Background Technology

[0002] An axial flux motor is a type of motor in which the magnetic flux direction is distributed along the motor axis. It is widely used in response scenarios such as wheel hub drive in new energy vehicles. By employing an axial arrangement of the stator windings and the permanent magnet rotor, the magnetic flux enters the stator from the rotor surface along the axial direction through the air gap, forming a closed loop. This results in an axial flux motor having an extremely short magnetic flux path and a flat structure, enabling higher power density and torque density within the same volume.

[0003] An axial flux motor consists of a stator and a rotor. The stator includes windings and a core, while the rotor integrates permanent magnets. These permanent magnets generate an axial magnetic field through electromagnetic induction to drive the rotor's rotation, thus achieving torque output. Because the windings and core of an axial flux motor are densely arranged within a limited space, heat easily accumulates deep within the stator. Therefore, related technologies typically inject cooling oil directly into the sealed cavity between the stator and rotor, achieving efficient heat dissipation through direct contact between the oil and the stator windings and core.

[0004] However, when cooling oil is injected directly into the sealed cavity, the high-speed rotating rotor will violently agitate the oil, generating eddy current resistance and resulting in additional energy loss. Summary of the Invention

[0005] This invention provides an axial flux motor to solve the problem of eddy current resistance caused by the rotor violently agitating the oil, resulting in additional energy loss.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] This invention provides an axial flux motor, comprising:

[0008] case;

[0009] The stator is disposed within the aforementioned housing, and the two stators are arranged parallel and coaxially along the axial direction. The stator includes an iron core and a winding wound on the iron core.

[0010] The rotor is disposed within the aforementioned housing and located between the two aforementioned stators. The rotor includes a plurality of permanent magnets and a rotor disk, with the permanent magnets arranged along the periphery of the rotor disk.

[0011] The output shaft is connected at one end to the rotor disk and extends out of the housing at the other end. The output shaft is configured to rotate under the drive of the rotor disk.

[0012] The sealing assembly includes two seals, which are respectively connected to the two iron cores, and a receiving cavity is formed between the two seals, in which the permanent magnet is located.

[0013] In one possible implementation, the sealing element includes a sealing portion and an abutting portion connected to each other. The sealing portion has an annular structure and is connected to the iron core. The abutting portions of the two sealing elements abut against each other.

[0014] In one possible implementation, the seal further includes a plurality of first mounting portions, which are disposed on the inner ring of the seal and are connected to the iron core.

[0015] In one possible implementation, the axial flux motor further includes multiple limiting members. The iron core has multiple winding slots, the winding is wound in the winding slots, and the limiting members are disposed in the winding slots to fix the winding in the winding slots.

[0016] In one possible implementation, the first mounting part is provided in a one-to-one correspondence with a portion of the winding groove, and the first mounting part is engaged in the winding groove.

[0017] In one possible implementation, a locking part is provided in the winding groove, and the limiting member is inserted into the winding groove along the radial direction of the iron core and abuts against the locking part.

[0018] In one possible implementation, the seal further includes a plurality of second mounting portions connected to the winding.

[0019] In one possible implementation, the second mounting part is a wire clamping groove, which engages with the winding.

[0020] In one possible implementation, the sealing assembly further includes a sealing ring disposed on the sealing member, with the sealing rings on the two sealing members abutting each other.

[0021] In one possible implementation, the seal is further provided with an oil discharge groove, which is located above the oil line.

[0022] The beneficial effects of this invention are:

[0023] This invention provides an axial flux motor, comprising a housing; two stators disposed within the housing, the stators being parallel and coaxially arranged along the axial direction, each stator including an iron core and windings wound on the iron core; a rotor disposed within the housing and located between the two stators, the rotor including multiple permanent magnets and a rotor disk, the permanent magnets being arranged along the circumference of the rotor disk; an output shaft, one end connected to the rotor disk and the other end extending out of the housing, the output shaft being configured to rotate under the drive of the rotor disk; and a sealing assembly including two seals, each seal being connected to one of the two iron cores, forming a receiving cavity between the two seals, the permanent magnets being located within the receiving cavity. By placing the permanent magnets within the receiving cavity, the seals provide shielding, preventing cooling oil from entering the receiving cavity, thereby avoiding the problem of violently agitating the oil and generating eddy current resistance when the permanent magnets rotate, resulting in additional energy loss. Attached Figure Description

[0024] Figure 1 The diagram shown is a structural schematic of the axial flux motor provided by the present invention. Figure 1 ;

[0025] Figure 2 The diagram shown is a structural schematic of the axial flux motor provided by the present invention. Figure 2 ;

[0026] Figure 3 The diagram shown is a structural schematic of the axial flux motor provided by the present invention. Figure 3 ;

[0027] Figure 4 Displayed as Figure 1 A schematic diagram of the structure of the first sealing element.

[0028] In the picture,

[0029] 100 - Stator; 110 - Core; 120 - Winding;

[0030] 200 - Rotor; 210 - Permanent magnet; 220 - Rotor disk;

[0031] 300-output shaft;

[0032] 400 - Sealing assembly; 410 - Seal; 411 - Sealing part; 412 - Abutting part; 413 - First mounting part; 414 - Second mounting part; 415 - Oil unloading groove; 420 - Sealing ring;

[0033] 500 - Limiting component. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of the embodiments of this application.

[0035] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0037] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0038] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0039] Unless otherwise stated, the term "multiple" means two or more.

[0040] First, let me explain the terms used in this application:

[0041] Permanent magnets: Permanent magnets are hard magnetic materials that can maintain their magnetism for a long time without the need for external energy. They can generate a stable magnetic field without an external power source. The core principle of permanent magnets is that there are a large number of neatly arranged tiny magnetic regions (called magnetic domains) inside the material. These magnetic domains maintain a fixed orientation after being magnetized, thus forming permanent magnetism.

[0042] Winding: A winding is a coil system formed by winding conductors (copper or aluminum wires) in a specific shape and arrangement. When current flows through the winding, the coil generates a magnetic field. In an axial flux motor, the magnetic field generated by the winding can interact with a permanent magnet, driving the permanent magnet to rotate.

[0043] As described in the background section, an axial flux motor is a type of motor in which the magnetic flux direction is distributed along the motor axis. It is widely used in response scenarios such as hub drive in new energy vehicles. By employing an axial arrangement of the stator windings and the permanent magnet rotor, the magnetic flux passes through the air gap from the rotor surface along the axis and enters the stator, forming a closed loop. This results in an axial flux motor having an extremely short magnetic flux path and a flat structure, enabling higher power density and torque density within the same volume.

[0044] An axial flux motor consists of a stator and a rotor. The stator includes windings and a core, while the rotor integrates permanent magnets. These permanent magnets generate an axial magnetic field through electromagnetic induction to drive the rotor's rotation, thus achieving torque output. Because the windings and core of an axial flux motor are densely arranged within a limited space, heat easily accumulates deep within the stator. Therefore, related technologies typically inject cooling oil directly into the sealed cavity between the stator and rotor, achieving efficient heat dissipation through direct contact between the oil and the stator windings and core.

[0045] However, when cooling oil is injected directly into the sealed cavity, the high-speed rotating rotor will violently agitate the oil, generating eddy current resistance and resulting in additional energy loss.

[0046] This application provides an axial flux motor, comprising a housing; two stators disposed within the housing, the stators being parallel and coaxially arranged along the axial direction, each stator including an iron core and windings wound on the iron core; a rotor disposed within the housing and located between the two stators, the rotor including multiple permanent magnets and a rotor disk, the permanent magnets being arranged along the circumference of the rotor disk; an output shaft, one end connected to the rotor disk and the other end extending out of the housing, the output shaft being configured to rotate under the drive of the rotor disk; and a sealing assembly including two seals, each seal being connected to one of the two iron cores, forming a receiving cavity between the two seals, the permanent magnets being located within the receiving cavity. By placing the permanent magnets within the receiving cavity, the seals provide shielding, preventing cooling oil from entering the receiving cavity, thereby avoiding the problem of violently agitating the oil and generating eddy current resistance when the permanent magnets rotate, resulting in additional energy loss.

[0047] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0048] This embodiment provides an axial flux motor, including a housing; two stators 100 disposed within the housing, the two stators 100 being parallel and coaxially arranged along the axial direction, each stator 100 including an iron core 110 and a winding 120 wound on the iron core 110; a rotor 200 disposed within the housing and located between the two stators 100, the rotor 200 including a plurality of permanent magnets 210 and a rotor 200 disk, the permanent magnets 210 being arranged along the periphery of the rotor 200 disk; an output shaft 300, one end connected to the rotor 200 disk and the other end extending out of the housing, the output shaft 300 being configured to rotate under the drive of the rotor 200 disk; and a sealing assembly 400 including two seals 410, the two seals 410 being respectively connected to the two iron cores 110, forming a receiving cavity between the two seals 410, the permanent magnets 210 being located within the receiving cavity.

[0049] Specifically, in this embodiment, two stators 100 are arranged parallel and coaxially inside the housing along their own axial direction. The stators 100 are fixedly connected to the housing. Each stator 100 includes an iron core 110 and windings 120 wound on the iron core 110, thereby forming a symmetrical magnetic field distribution. The rotor 200 is located between the two stators 100 and consists of a rotor 200 disk and a plurality of permanent magnets 210 arranged along the periphery of the rotor 200 disk. One end of the output shaft 300 is connected to the rotor 200 disk, and the other end extends out of the housing.

[0050] When the axial flux motor is operating, the winding 120 generates a rotating magnetic field after being energized. Since the two stators 100 are symmetrically arranged, their magnetic fields simultaneously act on the permanent magnet 210. The interaction between the magnetic field and the permanent magnet 210 drives the rotor 200 to rotate. The rotation of the rotor 200 drives the connected output shaft 300 to rotate as well, thereby outputting mechanical power.

[0051] Meanwhile, since the stator windings 120 and core 110 of the axial flux motor generate a large amount of heat during operation, cooling is required. The cooling oil filled inside the housing can effectively remove the heat and ensure the normal operation of the motor.

[0052] The cooling oil level is kept below the oil line. The oil level is controlled by a preset oil line to ensure sufficient cooling while preventing the oil level from becoming too high and affecting other components.

[0053] During the rotation of rotor 200, permanent magnet 210 will agitate the cooling oil. The high-speed rotating oil will scour the surface of permanent magnet 210. Long-term operation may cause wear on the protective layer on the surface of permanent magnet 210. At the same time, the oil entering the gap of permanent magnet 210 will generate additional rotational resistance, reduce motor efficiency, and cause additional energy loss.

[0054] To address the aforementioned issues, the axial flux motor provided in this embodiment further includes a sealing assembly 400. The sealing assembly 400 comprises two seals 410, each connected to one of the two stators 100. A receiving cavity is formed between the two seals 410, and the permanent magnet 210 is located within this cavity. This receiving cavity isolates the permanent magnet 210 from the cooling oil, preventing direct contact between the cooling oil and the surface of the permanent magnet 210, thus preventing wear on the protective layer of the permanent magnet 210 surface. It also reduces the rotational resistance of the oil, improving motor operating efficiency. Furthermore, this sealing structure prevents impurities in the oil from entering the gaps between the permanent magnets 210, ensuring a uniform and stable magnetic field distribution.

[0055] By employing the axial flux motor provided in this embodiment, the cooling oil level is controlled to be below the oil line, ensuring effective cooling of the stator 100 while preventing the oil level from being too high and affecting the operation of the rotor 200. The cooling oil circulates within the housing, carrying away the heat generated by the stator 100 and maintaining the normal operating temperature of the axial flux motor. Simultaneously, by incorporating the sealing assembly 400, heat dissipation is ensured while effectively protecting the permanent magnet 210 from the influence of the oil.

[0056] In an optional embodiment, the iron core 110 is provided with an oil spray hole. The operator can spray cooling oil into the housing through the oil spray hole, or directly inject cooling oil into the housing. This embodiment does not impose any restrictions on this.

[0057] In an optional embodiment, the seal 410 includes a sealing portion 411 and an abutment portion 412 connected to each other. The sealing portion 411 has an annular structure and is connected to the iron core 110. The abutment portions 412 of the two seals 410 abut against each other.

[0058] Specifically, in this embodiment, the air gap between the iron core 110 of the stator 100 and the permanent magnet 210 of the rotor 200 is called the air gap space. As a component of the magnetic circuit, the air gap space directly affects the distribution and strength of the magnetic field, and its size directly affects the electromagnetic performance and efficiency of the motor. At the same time, an appropriate air gap space can also ensure that the rotor 200 does not rub or collide with the stator 100 during rotation.

[0059] In this embodiment, the seal 410 includes a sealing part 411 and an abutment part 412 connected to each other, and the sealing part 411 has an annular structure.

[0060] Specifically, if the sealing part 411 is directly set as a flat plate structure, it will directly occupy the air gap space, thereby increasing the magnetic reluctance and reducing the magnetic field strength. At the same time, the excitation current needs to be increased to maintain the original magnetic field strength, which greatly reduces the working efficiency of the motor.

[0061] Therefore, the sealing part 411 in this embodiment is an annular structure. The annular structure is arranged along the inner or outer edge of the iron core 110, and will not extend to the main air gap space between the stator 100 and the rotor 200. Thus, it achieves both sealing protection of the permanent magnet 210 and does not occupy additional air gap space.

[0062] Specifically, in this embodiment, the sealing part 411 is in contact with the end face of the iron core 110, and its radial dimension is the same as that of the iron core 110, thereby ensuring that the air gap distance is not affected by the sealing part 411.

[0063] Meanwhile, in this embodiment, the abutting portions 412 of the two seals 410 abut against each other to form a sealed connection. The two seals 410 are axially positioned and pressed by the two iron cores 110, which can ensure that the two abutting portions 412 form a tight contact and effectively prevent cooling oil from penetrating into the accommodating cavity.

[0064] In an optional embodiment, the seal 410 further includes a plurality of first mounting portions 413 disposed on the inner ring of the seal 411 and connected to the iron core 110.

[0065] Specifically, in this embodiment, the seal 410 is fixed to the iron core 110 by connecting it to the first mounting portion 413. The first mounting portion 413 is evenly and spaced along the inner ring of the seal portion 411, thereby achieving multi-point connection with the iron core 110, ensuring the stability of the connection, and preventing the seal 410 from falling off due to vibration during the operation of the axial flux motor.

[0066] Meanwhile, by setting the first mounting part 413, the seal 410 is precisely positioned. By controlling the machining accuracy of the first mounting part 413, the accuracy of the relative position between the seal 410 and the iron core 110 can be ensured, so that the two abutting parts 412 can be precisely aligned.

[0067] The specific structure of the first mounting part 413 can be adapted to actual needs, and this embodiment does not impose any restrictions on it. For example, the first mounting part 413 is a protruding structure, and the corresponding iron core 110 has a groove structure, so that precise alignment can be achieved through the protruding structure and the groove structure.

[0068] In an optional embodiment, the axial flux motor further includes a plurality of limiting members 500. The iron core 110 has a plurality of winding slots, and the winding 120 is wound in the winding slots. The limiting members 500 are disposed in the winding slots to fix the winding 120 in the winding slots.

[0069] Specifically, in this embodiment, the axial flux motor also includes multiple limiting members 500. The iron core 110 has multiple winding slots evenly distributed along the circumference. The winding 120 is embedded in the winding slot according to a preset winding method. The limiting members 500 are set at the opening position of the winding slot to fix the winding 120 in the winding slot.

[0070] By fixing the winding 120 with the limiting member 500, displacement and loosening of the winding 120 due to electromagnetic force or centrifugal force can be prevented during the operation of the axial flux motor, ensuring the stability of the winding 120. At the same time, the limiting member 500 can apply appropriate clamping force to the winding 120, thereby improving the heat conduction between the winding 120 and the iron core 110 and facilitating the heat dissipation of the winding 120.

[0071] In this embodiment, the limiting member 500 is a wedge-shaped block. The wedge-shaped block is embedded in the opening of the winding groove. The inclined surface structure of the wedge-shaped block applies a radial clamping force to the winding 120, thereby fixing the winding 120 in the winding groove.

[0072] In other embodiments, the specific structure of the limiting member 500 can also be adapted, and this embodiment does not impose any restrictions on this.

[0073] In an optional embodiment, the first mounting part 413 is provided in a one-to-one correspondence with a portion of the winding groove, and the first mounting part 413 is snapped into the winding groove.

[0074] Specifically, in this embodiment, the multiple first mounting portions 413 of the seal 410 are arranged in a one-to-one correspondence with the winding slots on the stator core 110. Each first mounting portion 413 corresponds to a specific winding slot and is directly embedded in the winding slot for fixation. This utilizes the existing structural space of the winding slot for fixation, eliminating the need for additional mounting holes on the core 110 and ensuring the integrity of the magnetic circuit of the core 110. Mechanical interlocking is achieved through the snap-fit ​​engagement between the first mounting portion 413 and the winding slot, ensuring dual positioning accuracy of the seal 410 in both the axial and radial directions.

[0075] Specifically, in this embodiment, the first mounting part 413 is a protruding structure that matches the cross-section of the winding groove. It is engaged with the winding groove through elastic deformation or interference fit, thereby automatically correcting the circumferential position of the seal 410 during assembly and ensuring the alignment accuracy between the two seals 410. At the same time, the winding groove that engages with the first mounting part 413 can still normally accommodate the winding 120, and the first mounting part 413 can perform a pressing operation on the winding 120, so that no additional limiting member 500 is needed in the winding groove where the first mounting part 413 is set.

[0076] Alternatively, in an optional embodiment, the first mounting part 413 may be embedded together with the limiting member 500 in the winding groove, so that the fixing and installation of the first mounting part 413 are not affected while limiting the winding 120.

[0077] In an optional embodiment, a locking part is provided in the winding groove, and the limiting member 500 is inserted into the winding groove along the radial direction of the iron core 110 and abuts against the locking part.

[0078] Specifically, in this embodiment, a locking part for locking the limiting member 500 is provided in the winding groove. The limiting member 500 is inserted into the winding groove along the radial direction of the iron core 110 and abuts against the locking part, thereby fixing the limiting member 500.

[0079] Specifically, in this embodiment, the snap-fit ​​part is a protruding structure on the inner wall of the winding groove. After the limiting member 500 is inserted into the winding groove along the radial direction of the iron core 110, the side of the limiting member 500 will abut against the snap-fit ​​part, thereby fixing the limiting member 500 and preventing the limiting member 500 from falling off due to vibration during the operation of the axial flux motor.

[0080] In an optional embodiment, the seal 410 further includes a plurality of second mounting portions 414 connected to the winding 120.

[0081] Specifically, in this embodiment, the seal 410 also includes a plurality of second mounting portions 414 connected to the winding 120, thereby further improving the stability of the seal 410.

[0082] The multiple second mounting portions 414 can be spaced apart from the multiple first mounting portions 413, so as to be connected to the winding 120 and the iron core 110 respectively, thereby ensuring the structural stability of the seal 410 and suppressing the vibration displacement of the winding 120.

[0083] In this embodiment, the second mounting part 414 can adopt an elastic clamping structure to clamp the winding 120. Alternatively, the specific structure of the second mounting part 414 can be adaptively selected according to actual needs. This embodiment does not impose any restrictions on this.

[0084] In an optional embodiment, the second mounting part 414 is a wire-clamping groove that engages with the winding 120.

[0085] Specifically, in this embodiment, the second mounting part 414 is a wire clamping groove, which is arranged at intervals along the periphery of the seal 410. The opening size and shape of the wire clamping groove are matched with the end wire of the winding 120 to achieve a snap-fit ​​connection.

[0086] In this embodiment, the inner wall of the wire clamping groove is provided with an elastic and insulating material. During assembly, the end wire of the winding 120 is inserted into the corresponding wire clamping groove along the axial direction. The elastic deformation of the groove wall generates a continuous clamping force, which ensures the stability of the fixation while avoiding the displacement tendency of the winding 120 under the action of electromagnetic force and centrifugal force.

[0087] By using the axial flux motor provided in this embodiment, without the need for additional fasteners, the end of the winding 120 is fixed while further ensuring the stability of the seal 410 installation.

[0088] In an optional embodiment, the sealing assembly 400 further includes a sealing ring 420 disposed on the sealing member 410, with the sealing rings 420 on the two sealing members 410 abutting against each other.

[0089] Specifically, in this embodiment, the sealing assembly 400 further includes a sealing ring 420, which is directly formed onto the contact surface of the sealing element 410 through an overmolding process. Specifically, the sealing ring 420 is formed by directly injection molding an elastic sealing material onto the contact area of ​​the sealing element 410, creating a strong molecular-level bond with the sealing element 410 and avoiding the potential detachment problem of traditional sealing rings 420.

[0090] When the two seals 410 are assembled, the sealing rings 420 undergo elastic deformation under axial pressure and fit tightly against each other to form a sealing surface, thereby preventing the cooling oil in the housing from entering the accommodating cavity.

[0091] Meanwhile, in other embodiments, the sealing ring 420 may also be disposed on the sealing element 410 using other manufacturing processes, and this embodiment does not impose any restrictions on this.

[0092] In an optional embodiment, the seal 410 is further provided with an oil discharge groove 415, which is located above the oil line.

[0093] Specifically, in this embodiment, the seal 410 is further provided with an oil drain groove 415, which is located above the oil line and extends circumferentially along the seal 410. During operation of the axial flux motor, a small amount of cooling oil may enter the accommodating cavity due to vibration or other reasons. In this case, the permanent magnet 210 can agitate the cooling oil in the accommodating cavity, causing it to be discharged through the oil drain groove 415, thereby preventing the cooling oil entering the accommodating cavity from affecting the normal operation of the axial flux motor. Simultaneously, by making the height of the oil drain groove 415 higher than the oil line, cooling oil is prevented from entering the accommodating cavity through the oil drain groove 415.

[0094] In this embodiment, each seal 410 has two oil drain grooves 415, which are arranged opposite to each other on the seal 410. The angle between the center point of the two oil drain grooves 415 and the line connecting them to the center of the seal 410 is 90°, thus ensuring that the cooling oil can be smoothly discharged from the oil drain grooves 415. The 90° angle ensures that the spacing between the two oil drain grooves 415 is reasonable, avoiding structural interference, and that their oil collection range can cover the main area of ​​the seal 410.

[0095] In another alternative embodiment, the unloading grooves 415 on the two seals 410 can be aligned with each other, thereby increasing the unloading area.

[0096] In addition, in other embodiments, the number and location of the unloading tanks 415 can be adapted to actual needs, and this embodiment does not impose any restrictions on this.

[0097] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An axial flux motor, characterized in that, include: case; Two stators (100) are disposed in the housing. The two stators (100) are parallel and coaxially arranged along the axial direction. Each stator (100) includes an iron core (110) and a winding (120) wound on the iron core (110). The rotor (200) is disposed within the housing and located between the two stators (100). The rotor (200) includes a plurality of permanent magnets (210) and a rotor (200) disk, wherein the permanent magnets (210) are disposed along the periphery of the rotor (200) disk. An output shaft (300) is connected at one end to the rotor (200) disk and extends out of the housing at the other end. The output shaft (300) is configured to rotate under the drive of the rotor (200) disk. The sealing assembly (400) includes two sealing elements (410), which are respectively connected to two iron cores (110). A receiving cavity is formed between the two sealing elements (410), and the permanent magnet (210) is located in the receiving cavity. Each sealing element (410) includes a sealing portion (411) and an abutment portion (412) connected to each other. The sealing portion (411) has an annular structure, and the sealing portion (411) is connected to the iron core (110). The two seals (410) are connected, and the abutting portions (412) of the two seals (410) abut against each other; the seal (410) also includes a plurality of first mounting portions (413), the first mounting portions (413) are disposed on the inner ring of the seal (411), and the first mounting portions (413) are connected to the iron core (110); the seal (410) also includes a plurality of second mounting portions (414), the second mounting portions (414) are connected to the winding (120).

2. An axial flux motor according to claim 1, characterized in that, It also includes multiple limiting members (500), and the iron core (110) has multiple winding grooves. The winding (120) is wound in the winding grooves, and the limiting members (500) are disposed in the winding grooves to fix the winding (120) in the winding grooves.

3. An axial flux motor according to claim 2, characterized in that, The first mounting part (413) is provided in a one-to-one correspondence with a portion of the winding groove, and the first mounting part (413) is snapped into the winding groove.

4. An axial flux motor according to claim 2, characterized in that, A snap-fit ​​part is provided in the winding groove, and the limiting member (500) is inserted into the winding groove along the radial direction of the iron core (110) and abuts against the snap-fit ​​part.

5. An axial flux motor according to any one of claims 1-4, characterized in that, The second mounting part (414) is a wire clamping groove, which is engaged with the winding (120).

6. An axial flux motor according to any one of claims 1-4, characterized in that, The sealing assembly (400) further includes a sealing ring (420) disposed on the sealing member (410), and the sealing rings (420) on the two sealing members (410) abut against each other.

7. An axial flux motor according to any one of claims 1-4, characterized in that, The sealing element (410) is also provided with an oil unloading groove (415), which is located above the oil line.

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