Electric machine and electric device

Abstract

This application provides an electric motor and an electrical device. The motor includes a stator assembly, a rotor assembly, and a shaft. The rotor assembly and the stator assembly are arranged along a first direction, and the rotor assembly is used for contact connection with a rotating component. The shaft is coaxially arranged with the stator assembly and the rotor assembly, and the axis of the shaft is parallel to the first direction. The shaft is fixedly connected to the rotor assembly and rotatably connected to the stator assembly. According to this application, the connection reliability and structural compactness between the motor and the rotating component can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a motor and an electrical device. Background Technology

[0002] Electric motors, as devices that convert electrical energy into mechanical energy, are widely used in electronic equipment, such as electric vehicles, electric cars, electric airplanes, electric ships, and so on.

[0003] Electric motors are typically connected to rotating parts to drive them to rotate. Improving the reliability of the connection between the motor and the rotating parts and the compactness of the structure is an important research direction in the field of motor technology. Summary of the Invention

[0004] In view of the above problems, this application provides an electric motor and an electrical device that can effectively improve the reliability of the connection between the motor and the rotating parts and the structural compactness.

[0005] In a first aspect, embodiments of this application provide an electric motor, which includes a stator assembly, a rotor assembly, and a rotating shaft. The rotor assembly and the stator assembly are arranged along a first direction, and the rotor assembly is used for contact connection with a rotating component. The rotating shaft is coaxially arranged with the stator assembly and the rotor assembly, and the axial direction of the rotating shaft is parallel to the first direction. The rotating shaft is fixedly connected to the rotor assembly and rotatably connected to the stator assembly.

[0006] The aforementioned technical solution, by directly bonding the rotor assembly to the rotating component, effectively increases the contact area between the motor and the rotating component, thereby dispersing working stress and improving the connection reliability between the motor and the rotating component. This contributes to enhancing the stability of the rotating body during rotation. Furthermore, it eliminates the need for additional adapter components to improve the connection strength between the shaft and the rotating component, helping to reduce overall structural complexity. Additionally, by directly bonding the rotor assembly to the rotating component, the rotating component and the motor can be more compact axially, thus improving the structural compactness between the motor and the rotating component.

[0007] In some embodiments of the first aspect, the stator assembly includes a first stator member and a stator housing, a shaft is rotatably connected to the first stator member, at least a portion of the first stator member is disposed within the stator housing, and the first stator member is connected to the stator housing.

[0008] The stator housing described above provides support and protection for the first stator component, reducing the impact of the external environment and thus extending the motor's lifespan. Furthermore, the stator housing helps reduce vibration or swaying during motor operation, improving output stability.

[0009] In some embodiments of the first aspect, the rotor assembly includes a first rotor member, a shaft fixedly connected to the first rotor member, and the first rotor member being used for contact connection with a rotating member. The stator housing has a first opening at one end along a first direction, and the first rotor member is disposed on the side of the first stator member near the first opening.

[0010] The first opening in the above technical solution can provide an installation environment for the first rotor component, thereby reducing the assembly difficulty between the first rotor component and the rotating component and improving the ease of use of the motor.

[0011] In some embodiments of the first aspect, the first rotor element is disposed outside the stator housing.

[0012] The above technical solution can further expand the installation environment of the first rotor component, thereby further reducing the assembly difficulty between the first rotor component and the rotating component, and thus further improving the ease of use of the motor.

[0013] In some embodiments of the first aspect, the rotor assembly further includes a second rotor member, which is coaxially disposed with the first rotor member and the shaft is fixedly connected to the second rotor member. The second rotor member is disposed on the side of the first stator member facing away from the first rotor member along a first direction.

[0014] The above technical solution, by further introducing a second rotor component and placing the first stator component between the first rotor component and the second rotor component, not only improves the overall output torque of the motor, but also makes the magnetic flux more symmetrical and fully utilized in the axial direction, reduces leakage magnetic loss, and thus improves the electromagnetic utilization efficiency of the motor.

[0015] In some embodiments of the first aspect, the second rotor element is housed within a stator housing.

[0016] The stator housing can provide some protection for the second rotor components, reducing the risk of damage to the second rotor components from the external environment and helping to improve the service life of the motor.

[0017] In some embodiments of the first aspect, the stator housing has a second opening at the other end along the first direction, and the second rotor member is disposed on the side of the first stator member near the second opening.

[0018] The second opening in the above technical solution can provide an installation environment for the second rotor component, thereby reducing the assembly difficulty of the second rotor component, improving the assembly efficiency and ease of use of the motor, and also helping to reduce costs.

[0019] In some embodiments of the first aspect, the second rotor is used for a contact connection with the rotating member.

[0020] The above technical solution can further increase the contact area between the motor and the rotating parts, thereby improving the reliability of the connection between them. In addition, it can shorten the force transmission path of the second rotor, allowing it to directly drive the rotating body, thus improving the energy utilization efficiency of the motor.

[0021] In some embodiments of the first aspect, the rotor assembly includes a first rotor member and a rotor housing, a shaft is fixedly connected to at least one of the first rotor member and the rotor housing, at least a portion of the first rotor member is disposed within the rotor housing, and the first rotor member is connected to the inner wall of the rotor housing.

[0022] The rotor housing of the above technical solution can provide a certain degree of protection for the first rotor component, reduce the impact of the external environment on the first rotor component, and thus improve the service life of the motor.

[0023] In some embodiments of the first aspect, the outer wall of the rotor housing is used for a close-fitting connection with the rotating component.

[0024] The outer wall of the rotor housing being in close contact with the rotating component means that the outer wall of the rotor housing is directly connected to the rotating component. This further increases the contact area between the rotor assembly and the rotating component, thereby further improving the connection reliability between the motor and the rotating component.

[0025] In some embodiments of the first aspect, the stator assembly includes a first stator member, a shaft rotatably connected to the first stator member, a rotor housing having a third opening at one end along a first direction, and the first stator member being disposed on the side of the first rotor member near the third opening.

[0026] The third opening in the above technical solution can provide an installation environment for the first stator component, thereby reducing the difficulty of fixing and assembling the first stator component and improving the ease of use of the motor.

[0027] In some embodiments of the first aspect, at least a portion of the first stator element is housed within a rotor housing.

[0028] The rotor housing can provide some protection for the first stator component, reducing the risk of damage to the first stator component from the external environment and helping to improve the service life of the motor.

[0029] In some embodiments of the first aspect, the stator assembly further includes a second stator member, to which a shaft is rotatably connected, and a fourth opening is provided at the other end of the rotor housing along the first direction, with the second stator member disposed on the side of the first rotor member near the fourth opening.

[0030] The above technical solution further introduces a second stator component, with the first rotor component positioned between the first and second stator components. The first rotor can simultaneously couple with the magnetic fields generated by both the first and second stator components. This strengthens the effective air gap area and magnetic flux path of the motor within the same motor size, thereby increasing the torque output per unit volume. Since the first and second stator components are symmetrically located on both sides of the first rotor, the magnetic circuit distribution is more uniform, reducing magnetic flux asymmetry and leakage, and improving the electromagnetic energy conversion efficiency of the motor. The first rotor, sandwiched between the first and second stator components, has a more compact mechanical structure and more symmetrical force distribution, which helps reduce vibration and noise, improve the mechanical stability and service life of the motor.

[0031] In some embodiments of the first aspect, at least a portion of the second stator element is housed within the rotor housing.

[0032] The rotor housing can provide some protection for the second stator component, reducing the risk of damage to the second stator component from the external environment and helping to improve the service life of the motor.

[0033] In some embodiments of the first aspect, the rotor assembly includes a first rotor member, a shaft fixedly connected to the first rotor member, the first rotor member having a connecting hole, and a portion of the shaft being accommodated within the connecting hole.

[0034] The above technical solution introduces a connecting hole, which on the one hand can accommodate a portion of the shaft to reduce the space occupied by the shaft and improve the overall structural compactness of the motor; on the other hand, it can also increase the contact area between the shaft and the first rotor component and improve the connection reliability between the shaft and the first rotor component.

[0035] In some embodiments of the first aspect, in the first direction, the end of the shaft near the first rotor member is received within a connecting hole.

[0036] The above technical solution can not only reduce the interference of the rotating shaft on the assembly between the first rotor component and the rotating body, but also further reduce the space occupancy rate of the rotating shaft, so as to further improve the overall structural compactness of the motor.

[0037] In some embodiments of the first aspect, in the first direction and in the direction from which the stator assembly points to the rotor assembly, the area of ​​the cross section of the connecting hole perpendicular to the first direction gradually decreases, and the shaft fits against the inner surface of the connecting hole.

[0038] The above technical solution, by setting the connecting hole as a wedge-shaped structure, enables the shaft and the connecting hole to form a wedge-shaped fit, which can effectively improve the connection reliability between the shaft and the first rotor component.

[0039] In some embodiments of the first aspect, the motor further includes a fastener, a connecting hole extending through the first rotor member in a first direction, and an end of the shaft near the first rotor member protruding from a surface of the first rotor member away from the stator assembly in the first direction, the fastener connecting the end and the surface. This can further improve the reliability of the connection between the shaft and the first rotor member.

[0040] In some embodiments of the first aspect, the rotor assembly is provided with mounting holes for engaging with a fixing member to secure the rotating member to the rotor assembly. This further improves the reliability of the connection between the motor and the rotating member.

[0041] In some embodiments of the first aspect, the area of ​​the cross-section of the rotor assembly perpendicular to the first direction is greater than the area of ​​the cross-section of the stator assembly perpendicular to the first direction.

[0042] The above technical solution can effectively increase the overall output torque of the motor and improve its applicability by increasing the radial dimension of the rotor assembly.

[0043] Secondly, this application provides an electrical device including a rotating component and a motor provided in any embodiment of the first aspect, wherein a rotor assembly is fitted and connected to the rotating component.

[0044] In some embodiments of the second aspect, the rotating component includes a propeller.

[0045] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0046] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0047] Figure 1 This is a schematic diagram of the structure of a motor and a rotating component cooperating, provided in some embodiments of this application;

[0048] Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure along AA;

[0049] Figure 3 This is a schematic diagram of another structure for the cooperation between a motor and a rotating component, provided in some embodiments of this application;

[0050] Figure 4 for Figure 3 A schematic diagram of a cross-sectional structure along BB;

[0051] Figure 5 This is a schematic diagram of another structure for the cooperation between a motor and a rotating component provided in some embodiments of this application;

[0052] Figure 6 for Figure 5 Another cross-sectional view of the structure along CC.

[0053] The reference numerals in the detailed embodiments are as follows:

[0054] 100. Motor; 200. Rotating component;

[0055] 10. Stator assembly; 11. First stator component; 12. Stator housing; 121. First opening; 122. Second opening; 13. Second stator component;

[0056] 20. Rotor assembly; 21. First rotor component; 211. Connecting hole; 22. Rotor housing; 221. Third opening; 222. Fourth opening; 23. Second rotor component; 24. Mounting hole;

[0057] 30. Shaft;

[0058] 40. Fasteners;

[0059] X, the first direction. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0062] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0063] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0066] In this application, "multiple" means two or more (including two).

[0067] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0068] Electric motors, as devices that convert electrical energy into mechanical energy, are widely used in electronic devices such as electric vehicles, electric cars, electric airplanes, and electric ships. Electric motors are typically connected to rotating components to drive their rotation. Improving the reliability of the connection between the motor and the rotating components, as well as the structural compactness, is an important research direction in the field of electric motor technology.

[0069] In related technologies, motors typically connect to rotating components via a motor shaft, forming a shaft connection structure. The contact area between the motor shaft and the rotating component is small, and stress is concentrated, resulting in poor stability of the rotating component during motor operation. Furthermore, improving the connection reliability between the motor and the rotating component requires an additional adapter, increasing overall structural complexity and cost. Additionally, connecting the motor to the rotating component via a motor shaft necessitates reserving axial space for assembly, leading to poor structural compactness between the motor and the rotating component.

[0070] Based on the above considerations, this application provides an electric motor, which includes a stator assembly, a rotor assembly, and a rotating shaft. The rotor assembly and the stator assembly are arranged along a first direction, and the rotor assembly is used for contact connection with a rotating component. The rotating shaft is coaxially arranged with the stator assembly and the rotor assembly, and the axial direction of the rotating shaft is parallel to the first direction. The rotating shaft is fixedly connected to the rotor assembly and rotatably connected to the stator assembly.

[0071] The aforementioned technical solution, by directly bonding the rotor assembly to the rotating component, effectively increases the contact area between the motor and the rotating component, thereby dispersing working stress and improving the connection reliability between the motor and the rotating component. This contributes to enhancing the stability of the rotating body during rotation. Furthermore, it eliminates the need for additional adapter components to improve the connection strength between the shaft and the rotating component, helping to reduce overall structural complexity. Additionally, by directly bonding the rotor assembly to the rotating component, the rotating component and the motor can be more compact axially, thus improving the structural compactness between the motor and the rotating component.

[0072] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0073] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, among others. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0074] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including battery boxes and electrical devices using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0075] Figure 1 This is a schematic diagram of the structure of a motor and a rotating component cooperating, provided in some embodiments of this application. Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure along AA.

[0076] refer to Figures 1 to 2 This application provides an electric motor 100, which includes a stator assembly 10, a rotor assembly 20, and a rotating shaft 30. The rotor assembly 20 is disposed along a first direction X with the stator assembly 10, and the rotor assembly 20 is used for contact connection with a rotating component 200. The rotating shaft 30 is coaxially disposed with the stator assembly 10 and the rotor assembly 20, and the axis of the rotating shaft 30 is parallel to the first direction X. The rotating shaft 30 is fixedly connected to the rotor assembly 20 and rotatably connected to the stator assembly 10.

[0077] The rotor assembly 20 may include one or more rotor elements, where "multiple" means two or more, such as two, three, four, or five. As an example, a rotor element includes a rotor core and a magnet disposed on the rotor core.

[0078] The stator assembly 10 may include one or more stator components, where "multiple" refers to two or more, such as two, three, four, or five. As an example, a stator component includes a stator core and windings, with the windings disposed on the stator core.

[0079] A magnetic field is generated by passing an electric current through the windings of the stator; the magnet rotates under the influence of the Lorentz force in the magnetic field, thereby converting electrical energy into mechanical energy. For example, the magnet can be a permanent magnet.

[0080] The rotor core can be made of a magnetically conductive material, including iron; for example, the rotor core material includes silicon steel. The rotor core is located in the magnetic field generated by the stator of the motor 100, which enhances the magnetic induction intensity, thereby increasing the torque on the magnet and consequently increasing the output torque of the motor 100.

[0081] For example, the rotor core can be formed by powder metallurgy molding or by winding silicon steel sheets.

[0082] The first direction X can be understood as the axial direction of the motor 100. The rotor assembly 20 and the stator assembly 10 are arranged along the axial direction of the motor 100. The motor 100 in this embodiment can also be called an axial flux motor 100.

[0083] The shaft 30 can be directly connected to the rotor assembly 20, or it can be confined to the rotor assembly 20 by other components. As an example, the connection between the shaft 30 and the rotor assembly 20 can be, but is not limited to, plug-in, bolt connection, welding, riveting, snap-fit, or adhesive.

[0084] In some examples, the shaft 30 and the rotor assembly 20 are interference-fitted. The interference fit connection is simple and has high connection strength. The contact surface between the shaft 30 and the rotor assembly 20 can withstand higher centrifugal and tangential forces, thereby reducing the relative displacement between the shaft 30 and the rotor assembly 20 when the rotor assembly 20 rotates at high speed, improving the stability of the rotor assembly 20 operation, reducing eddy current losses in the rotor assembly 20, and improving efficiency.

[0085] The shaft 30 can be directly connected to the stator assembly 10, or it can be confined to the stator assembly 10 by other components. As an example, the connection method between the shaft 30 and the stator assembly 10 can be, but is not limited to, plug-in connection, bolt connection, welding, riveting, snap-fit ​​or bonding.

[0086] In some examples, the shaft 30 is connected to the stator assembly 10 via a bearing, a simple connection method that helps reduce costs.

[0087] The rotor assembly 20 being in close contact with the rotating component 200 means that the rotor assembly 20 is directly connected to the rotating component 200 through its own surface, rather than being indirectly connected to the rotating component 200 through the shaft 30 or other components.

[0088] Compared to the indirect connection between the rotor assembly 20 and the rotating component 200 via the shaft 30, directly connecting the rotor assembly 20 to the rotating component 200 can effectively increase the contact area between the motor 100 and the rotating component 200, thereby dispersing the working stress, improving the connection reliability between the motor 100 and the rotating component 200, and helping to improve the stability of the rotating body during rotation.

[0089] Furthermore, the absence of additional adapter components to enhance the connection between the shaft 30 and the rotating component 200 helps reduce the overall structural complexity. Additionally, by directly attaching the rotor assembly 20 to the rotating component 200, the rotating component 200 and the motor 100 can be more axially compact, thereby improving the structural compactness between the motor 100 and the rotating component 200.

[0090] Thus, the above technical solution can improve the connection reliability between the motor 100 and the rotating component 200, reduce the overall structural complexity, and improve the structural compactness between the motor 100 and the rotating component 200 by directly attaching the rotor assembly 20 to the rotating component 200.

[0091] In some embodiments, the stator assembly 10 includes a first stator component 11 and a stator housing 12, a rotating shaft 30 is rotatably connected to the first stator component 11, at least a portion of the first stator component 11 is disposed within the stator housing 12, and the first stator component 11 is connected to the stator housing 12.

[0092] The stator housing 12 serves as an external support and protective structure for the first stator component 11. The stator housing 12 can be made of high-strength, lightweight materials, such as aluminum alloy or high-performance engineering plastics, which can provide the necessary structural strength for the motor 100 while reducing the overall weight.

[0093] In some special environments (such as high temperature or high humidity environments), the stator housing 12 can also be made of high temperature resistant or corrosion resistant materials to ensure the long-term stable operation of the motor 100.

[0094] As an example, the first stator component 11 includes a first stator core and a first winding, with the first winding disposed on the first stator core.

[0095] The rotating shaft 30 can be directly connected to the first stator 11, or it can be restricted to the first stator 11 by other components.

[0096] In some examples, the rotating shaft 30 is connected to the first stator 11 via a bearing. Specifically, the first stator 11 has a through hole that extends through the first stator 11 along the first direction X. A bearing is installed inside the through hole, and the rotating shaft 30 is inserted into the bearing. This connection method is simple and helps to reduce costs.

[0097] The first stator component 11 can be partially disposed within the stator housing 12, or it can be entirely disposed within the stator housing 12.

[0098] The first stator component 11 can be detachably connected to the stator housing 12, or it can be integrally mounted on the stator housing 12. The first stator component 11 can be directly connected to the stator housing 12, or it can be constrained to the stator housing 12 by other components. As an example, the connection method between the first stator component 11 and the stator housing 12 can be, but is not limited to, bolt connection, welding, riveting, snap-fit, or bonding.

[0099] In some examples, the first stator component 11 and the stator housing 12 are integrally formed. On the one hand, there is no need to connect the first stator component 11 and the stator housing 12 through additional connecting processes, simplifying the manufacturing process. On the other hand, compared with connecting the first stator component 11 and the stator housing 12 through additional connecting processes, the integral structure of the first stator component 11 and the stator housing 12 has higher structural strength.

[0100] The stator housing 12 of the above-mentioned technical solution can support and protect the first stator component 11, reduce the impact of the external environment on the first stator component 11, and thus improve the service life of the motor 100. In addition, the stator housing 12 also helps to reduce vibration or shaking during the operation of the motor 100, thereby improving the output stability of the motor 100.

[0101] In some embodiments, the rotor assembly 20 includes a first rotor member 21, and a rotating shaft 30 is fixedly connected to the first rotor member 21. The first rotor member 21 is used for contact connection with the rotating member 200. The stator housing 12 has a first opening 121 at one end along the first direction X, and the first rotor member 21 is disposed on the side of the first stator member 11 near the first opening 121.

[0102] The rotating shaft 30 can be directly connected to the first rotor component 21, or it can be constrained to the first rotor component 21 by other components. As an example, the connection method between the rotating shaft 30 and the first rotor component 21 can be, but is not limited to, plug-in connection, bolt connection, welding, riveting, snap-fit ​​or adhesive connection.

[0103] In some examples, the shaft 30 is interference-fitted with the first rotor 21.

[0104] As an example, the first rotor component 21 includes a first rotor core and a first magnet, with the first magnet disposed on the first rotor core.

[0105] Alternatively, the stator housing 12 may be a cylindrical body. As an example, the stator housing 12 may be a cylindrical body.

[0106] The first rotor component 21 is in close contact with the rotating component 200, meaning that the first rotor component 21 is directly connected to the rotating component 200 through its own surface.

[0107] The first opening 121 of the above technical solution can provide an installation environment for the first rotor component 21, thereby reducing the assembly difficulty between the first rotor component 21 and the rotating component 200 and improving the ease of use of the motor 100.

[0108] In some embodiments, the first rotor member 21 is disposed outside the stator housing 12.

[0109] For example, the fact that the first rotor component 21 is disposed outside the stator housing 12 can also be understood as the projection of the first rotor component 21 along the direction perpendicular to the first direction X not overlapping with the projection of the stator housing 12 along the direction perpendicular to the first direction X.

[0110] The above technical solution can further increase the installation environment of the first rotor component 21, thereby further reducing the assembly difficulty between the first rotor component 21 and the rotating component 200, and thus further improving the ease of use of the motor 100.

[0111] In some embodiments, the rotor assembly 20 further includes a second rotor member 23, which is coaxially arranged with the first rotor member 21, and the shaft 30 is fixedly connected to the second rotor member 23. The second rotor member 23 is disposed on the side of the first stator member 11 facing away from the first rotor member 21 along the first direction X.

[0112] For example, a magnetic field is generated by passing an electric current through the first stator 11, and the first rotor 21 and the second rotor 23 can rotate simultaneously under the action of the Lorentz force in the magnetic field. The first rotor 21 and the second rotor 23 can rotate simultaneously in a clockwise direction or simultaneously in a counterclockwise direction.

[0113] During rotation, the first rotor component 21 can apply a force to the second rotor component 23 to drive its rotation, and the second rotor component 23 can apply a force to the first rotor component 21 to drive its rotation. Thus, the first rotor component 21 and the second rotor component 23 work together and, under their interaction, can increase the overall output torque of the motor 100.

[0114] The rotating shaft 30 can be directly connected to the second rotor component 23, or it can be constrained to the second rotor component 23 by other components. As an example, the connection method between the rotating shaft 30 and the second rotor component 23 can be, but is not limited to, plug-in connection, bolt connection, welding, riveting, snap-fit ​​or adhesive connection.

[0115] In some examples, the shaft 30 is interference-fitted with the second rotor 23.

[0116] The second rotor component 23 and the first rotor component 21 may have the same structure. As an example, the second rotor component 23 includes a second rotor core and a second magnet, the second magnet being disposed on the second rotor core.

[0117] The above technical solution, by further introducing a second rotor component 23 and placing the first stator component 11 between the first rotor component 21 and the second rotor component 23, not only improves the overall output torque of the motor 100, but also makes the magnetic flux more symmetrical and fully utilized in the axial direction, reduces leakage magnetic loss, and thus improves the electromagnetic utilization efficiency of the motor 100.

[0118] In some embodiments, at least a portion of the second rotor member 23 is housed within the stator housing 12.

[0119] The second rotor component 23 can be partially housed within the stator housing 12, or it can be entirely housed within the stator housing 12.

[0120] The stator housing 12 can provide a certain degree of protection for the second rotor component 23, reduce the risk of damage to the second rotor component 23 from the external environment, and help improve the service life of the motor 100.

[0121] In some embodiments, the stator housing 12 has a second opening 122 at the other end along the first direction X, and the second rotor member 23 is disposed on the side of the first stator member 11 near the second opening 122.

[0122] As an example, the stator housing 12 is a cylindrical body with openings at both ends along the first direction X.

[0123] The second opening 122 of the above technical solution can provide an installation environment for the second rotor component 23, thereby reducing the assembly difficulty of the second rotor component 23, improving the assembly efficiency and ease of use of the motor 100, and also helping to reduce costs.

[0124] In some embodiments, the second rotor 23 is used to be fitted and connected to the rotating member 200.

[0125] The second rotor component 23 being in close contact with the rotating component 200 means that the second rotor component 23 is directly connected to the rotating component 200 through its own surface.

[0126] The above technical solution can further increase the connection contact area between the motor 100 and the rotating component 200, thereby further improving the connection reliability between the motor 100 and the rotating component 200. In addition, it can also shorten the force transmission path of the second rotor component 23, enabling the second rotor component 23 to directly drive the rotating body to rotate, thereby improving the energy utilization efficiency of the motor 100.

[0127] In some embodiments, the second rotor member 23 is disposed outside the stator housing 12.

[0128] For example, the fact that the second rotor component 23 is disposed outside the stator housing 12 can also be understood as the projection of the second rotor component 23 along the direction perpendicular to the first direction X not overlapping with the projection of the stator housing 12 along the direction perpendicular to the first direction X.

[0129] The above technical solution can further increase the installation environment of the second rotor component 23, thereby further reducing the assembly difficulty between the second rotor component 23 and the rotating component 200, and thus further improving the ease of use of the motor 100.

[0130] In some embodiments, the stator assembly 10 includes a first stator component 11 and a second stator component 13, and the rotor assembly 20 includes a first rotor component 21. The rotating shaft 30, the first stator component 11, the second stator component 13 and the first rotor component 21 are coaxially arranged. The rotating shaft 30 is fixedly connected to the first rotor component 21 and rotatably connected to the first stator component 11 and the second stator component 13. The first rotor component 21 is disposed between the first stator component 11 and the second stator component 13 and is used to fit and connect the rotating component 200.

[0131] The first rotor component 21 is disposed between the first stator component 11 and the second stator component 13, allowing the first rotor to couple with the magnetic fields generated by both components simultaneously. This strengthens the effective air gap area and magnetic flux path of the motor 100 within the same motor size, thereby increasing the torque output per unit volume. Since the first stator component 11 and the second stator component 13 are symmetrically located on both sides of the first rotor, the magnetic circuit distribution is more uniform, reducing magnetic flux asymmetry and leakage, and improving the electromagnetic energy conversion efficiency of the motor 100. The first rotor, sandwiched between the first stator component 11 and the second stator component 13, has a more compact mechanical structure and more symmetrical force distribution, which helps reduce vibration and noise, and improves the mechanical stability and service life of the motor 100.

[0132] Based on the above embodiments, the stator assembly 10 further includes a plurality of stator housings 12, the plurality of stator housings 12 including a first stator housing and a second stator housing, the first stator housing and the second stator housing are spaced apart along a first direction X, at least a portion of the first stator component 11 is disposed in the first stator housing, the first stator component 11 is connected to the first stator housing, at least a portion of the second stator component 13 is disposed in the second stator housing, the second stator component 13 is connected to the second stator housing.

[0133] The above technical solution provides an installation environment for the first rotor component 21 by splitting the stator housing 12 into a first stator housing and a second stator housing, thereby reducing the assembly difficulty between the first rotor component 21 and the rotating component 200.

[0134] Figure 3 This is a schematic diagram of another structure for the cooperation between a motor and a rotating component, provided in some embodiments of this application. Figure 4 for Figure 3 A schematic diagram of a cross-sectional structure along BB.

[0135] Continue to refer to Figures 3 to 4 In some embodiments, the rotor assembly 20 includes a first rotor component 21 and a rotor housing 22, with a rotating shaft 30 fixedly connected to at least one of the first rotor component 21 and the rotor housing 22. At least a portion of the first rotor component 21 is disposed within the rotor housing 22, and the first rotor component 21 is connected to the inner wall of the rotor housing 22.

[0136] For example, during rotation, the first rotor component 21 can drive the rotor housing 22 to rotate synchronously. This can be achieved by the first rotor component 21 being in contact with the rotating component 200, the rotor housing 22 being in contact with the rotating component 200, or both the first rotor component 21 and the rotor housing 22 being in contact with the rotating component 200.

[0137] The rotor housing 22 can be made of high-strength, lightweight materials, such as aluminum alloy or high-performance engineering plastics, which can provide the necessary structural strength for the motor 100 while reducing the overall weight.

[0138] In some special environments (such as high temperature or high humidity environments), the material of rotor housing 22 can also be selected as high temperature resistant or corrosion resistant material to ensure long-term stable operation of motor 100.

[0139] The rotating shaft 30 can be fixedly connected to the first rotor component 21, fixedly connected to the rotor housing 22, or fixedly connected to both the first rotor component 21 and the rotor housing 22.

[0140] The first rotor component 21 can be partially disposed within the rotor housing 22, or it can be entirely disposed within the rotor housing 22.

[0141] The first rotor component 21 can be detachably connected to the rotor housing 22, or it can be integrally mounted on the rotor housing 22. The first rotor component 21 can be directly connected to the rotor housing 22, or it can be constrained to the rotor housing 22 by other components. As an example, the connection method between the first rotor component 21 and the rotor housing 22 can be, but is not limited to, bolt connection, welding, riveting, snap-fit, or bonding.

[0142] In some examples, the first rotor component 21 and the rotor housing 22 are integrally formed. On the one hand, there is no need to connect the first rotor component 21 and the rotor housing 22 through an additional connecting process, simplifying the manufacturing process. At the same time, compared with connecting the first rotor component 21 and the rotor housing 22 through an additional connecting process, the integral structure of the first rotor component 21 and the rotor housing 22 has higher structural strength.

[0143] The rotor housing 22 of the above technical solution can provide a certain degree of protection for the first rotor component 21, reduce the impact of the external environment on the first rotor component 21, and thus improve the service life of the motor 100.

[0144] In some embodiments, the outer wall of the rotor housing 22 is used to fit and connect with the rotating member 200.

[0145] The outer wall of the rotor housing 22 being in close contact with the rotating component 200 means that the outer wall of the rotor housing 22 is directly connected to the rotating component 200. This can further increase the contact area between the rotor assembly 20 and the rotating component 200, thereby further improving the connection reliability between the motor 100 and the rotating component 200.

[0146] In some embodiments, the stator assembly 10 includes a first stator component 11, a rotating shaft 30 is rotatably connected to the first stator component 11, and a rotor housing 22 has a third opening 221 at one end along a first direction X. The first stator component 11 is disposed on the side of the first rotor component 21 near the third opening 221.

[0147] Alternatively, the rotor housing 22 may be a cylindrical body. As an example, the rotor housing 22 may be a cylindrical body.

[0148] The third opening 221 of the above technical solution can provide an installation environment for the first stator component 11, thereby reducing the difficulty of fixing and assembling the first stator component 11 and improving the ease of use of the motor 100.

[0149] In some embodiments, at least a portion of the first stator member 11 is housed within the rotor housing 22.

[0150] The first stator component 11 may be partially or entirely housed within the rotor housing 22.

[0151] The rotor housing 22 can provide a certain degree of protection for the first stator component 11, reduce the risk of damage to the first stator component 11 from the external environment, and help improve the service life of the motor 100.

[0152] In some embodiments, the stator assembly 10 further includes a second stator component 13, the shaft 30 is rotatably connected to the second stator component 13, the rotor housing 22 has a fourth opening 222 at the other end along the first direction X, and the second stator component 13 is disposed on the side of the first rotor component 21 near the fourth opening 222.

[0153] For example, the first rotor component 21 is disposed between the first stator component 11 and the second stator component 13. When current is passed through the first stator component 11 and the second stator component 13, the magnetic fields generated by the first stator component 11 and the second stator component 13 can simultaneously drive the first rotor component 21 to rotate.

[0154] The rotating shaft 30 can be directly connected to the second stator 13, or it can be restricted to the second stator 13 by other components.

[0155] The second stator component 13 and the first stator component 11 may have the same structure. As an example, the second stator component 13 includes a second stator core and a second winding, the second winding being disposed on the second stator core.

[0156] In some examples, the shaft 30 is connected to the second stator 13 via a bearing. Specifically, the second stator 13 has a through hole that extends through the second stator 13 along the first direction X. A bearing is installed inside the through hole, and the shaft 30 is inserted into the bearing. This connection method is simple and helps to reduce costs.

[0157] The above technical solution further introduces a second stator component 13, with the first rotor component 21 disposed between the first stator component 11 and the second stator component 13. The first rotor can simultaneously couple with the magnetic fields generated by the first stator component 11 and the second stator component 13. Thus, within the same motor 100 size, the effective air gap area and magnetic flux path of the motor 100 are strengthened, thereby improving the torque output per unit volume. Since the first stator component 11 and the second stator component 13 are symmetrically located on both sides of the first rotor, the magnetic circuit distribution is more uniform, reducing magnetic flux asymmetry and magnetic leakage, and improving the electromagnetic energy conversion efficiency of the motor 100. The first rotor, sandwiched between the first stator component 11 and the second stator component 13, has a more compact mechanical structure and more symmetrical force distribution, which helps reduce vibration and noise, and improve the mechanical stability and service life of the motor 100.

[0158] In some embodiments, at least a portion of the second stator member 13 is housed within the rotor housing 22.

[0159] The second stator component 13 may be partially or entirely housed within the rotor housing 22.

[0160] The rotor housing 22 can provide a certain degree of protection for the second stator component 13, reduce the risk of damage to the second stator component 13 from the external environment, and help improve the service life of the motor 100.

[0161] In some embodiments, the rotor assembly 20 includes a first rotor element 21 and a second rotor element 23, and the stator assembly 10 includes a first stator element 11. The first stator element 11 is disposed between the first rotor element 21 and the second rotor element 23. The rotating shaft 30 is rotatably connected to the first stator element 11, passes through the first stator element 11, and its two ends are respectively fixedly connected to the first rotor element 21 and the second rotor element 23.

[0162] The first stator component 11 is disposed between the first rotor component 21 and the second rotor component 23. It can not only improve the overall output torque of the motor 100, but also make the magnetic flux more symmetrical and fully utilized in the axial direction, reduce leakage magnetic loss, and thus improve the electromagnetic utilization efficiency of the motor 100.

[0163] Based on the above embodiments, the rotor assembly 20 further includes a plurality of rotor housings 22, including a first rotor housing and a second rotor housing. The first rotor housing and the second rotor housing are spaced apart along a first direction X. At least a portion of the first rotor member 21 is disposed within the first rotor housing and is fixedly connected to the first rotor housing. At least a portion of the second rotor member 23 is disposed within the second rotor housing and is fixedly connected to the second rotor housing. The outer peripheral surface of the first rotor housing and / or the outer peripheral surface of the second rotor housing is used for fitting and connecting the rotating member 200.

[0164] The above technical solution, by dividing the rotor housing 22 into a first rotor housing and a second rotor housing, can provide an installation and fixing environment for the first stator component 11, thereby reducing the installation difficulty of the motor 100.

[0165] In some embodiments, the rotor assembly 20 includes a first rotor component 21, a rotating shaft 30 is fixedly connected to the first rotor component 21, the first rotor component 21 is provided with a connecting hole 211, and a portion of the rotating shaft 30 is accommodated in the connecting hole 211.

[0166] The structural shape of the connecting hole 211 matches the structural shape of the rotating shaft 30. As an example, the projection shape of the connecting hole 211 along the first direction X is circular, the projection shape of the rotating shaft 30 along the first direction X is circular, and the outer peripheral surface of the rotating shaft 30 is attached to the inner wall surface of the connecting hole 211.

[0167] For example, the connection hole 211 can be a through hole or a blind hole.

[0168] The above technical solution introduces a connecting hole 211, which on the one hand can accommodate a portion of the rotating shaft 30 to reduce the space occupancy rate of the rotating shaft 30 and improve the overall structural compactness of the motor 100; on the other hand, it can also increase the contact area between the rotating shaft 30 and the first rotor component 21 and improve the connection reliability between the rotating shaft 30 and the first rotor component 21.

[0169] In some embodiments, in the first direction X, the end of the shaft 30 near the first rotor member 21 is received within the connection hole 211. In other words, in the first direction X, the end of the shaft 30 near the first rotor member 21 does not protrude from the surface of the first rotor member 21 on the side away from the stator assembly 10 along the first direction X.

[0170] The above technical solution can not only reduce the interference of the rotating shaft 30 on the assembly between the first rotor component 21 and the rotating body, but also further reduce the space occupancy rate of the rotating shaft 30, so as to further improve the overall structural compactness of the motor 100.

[0171] Figure 5 This is a schematic diagram of another structure for the cooperation between a motor and a rotating component, provided in some embodiments of this application. Figure 6 for Figure 5 Another cross-sectional view of the structure along CC.

[0172] Continue to refer to Figures 5 to 6 In some embodiments, in the direction of the first direction X and the direction of the stator assembly 10 pointing to the rotor assembly 20, the area of ​​the cross section of the connecting hole 211 perpendicular to the first direction X gradually decreases, and the rotating shaft 30 is in contact with the inner surface of the connecting hole 211.

[0173] For example, in the first direction X and in the direction from the stator assembly 10 to the rotor assembly 20, the area of ​​the cross section of the shaft 30 perpendicular to the first direction X at least in the portion accommodated in the connection hole 211 gradually decreases so that the shaft 30 can fit against the inner surface of the connection hole 211.

[0174] The above technical solution, by setting the connecting hole 211 as a wedge-shaped structure, makes the rotating shaft 30 and the connecting hole 211 form a wedge-shaped fit, which can effectively improve the connection reliability between the rotating shaft 30 and the first rotor component 21.

[0175] In some embodiments, an adhesive is provided between the rotating shaft 30 and the inner wall surface of the connecting hole 211 to further improve the connection strength between the rotating shaft 30 and the inner wall surface of the connecting hole 211.

[0176] In some embodiments, the motor 100 further includes a fastener 40, a connecting hole 211 extending through the first rotor member 21 along a first direction X, and an end of the shaft 30 near the first rotor member 21 protruding from the surface of the first rotor member 21 on the side away from the stator assembly 10 along the first direction X. The fastener 40 connects this end and this surface. This can further improve the connection reliability between the shaft 30 and the first rotor member 21.

[0177] For example, fastener 40 may be, but is not limited to, nuts, bolts, or rivets.

[0178] In some embodiments, the rotor assembly 20 is provided with a mounting hole 24 for engaging with a fixing member to secure the rotating member 200 to the rotor assembly 20. This can further improve the connection reliability between the motor 100 and the rotating member 200.

[0179] In some examples, the mounting hole 24 is provided on the first rotor member 21. In other examples, the mounting hole 24 is provided on the rotor housing 22.

[0180] For example, the fastener can be, but is not limited to, nuts, bolts, or rivets.

[0181] In some embodiments, the area of ​​the cross-section of the rotor assembly 20 perpendicular to the first direction X is greater than the area of ​​the cross-section of the stator assembly 10 perpendicular to the first direction X. In other words, the radial dimension of the rotor assembly 20 is greater than the radial dimension of the stator assembly 10.

[0182] Understandably, due to the lever arm effect, when the radial dimension of the rotor assembly 20 increases, even if the electromagnetic force acting on the magnetic circuit remains the same, the final torque will increase proportionally due to the increased radius of the force application point. Therefore, under the same conditions, increasing the radial dimension of the rotor assembly 20 can significantly increase the output torque of the motor 100. Furthermore, a larger radial dimension of the rotor assembly 20 allows for the placement of larger or more magnets, increasing or at least maintaining the air gap magnetic flux density at a higher level, thereby strengthening electromagnetic coupling.

[0183] The above technical solution can effectively increase the overall output torque of the motor 100 and improve the applicability of the motor 100 by increasing the radial dimension of the rotor assembly 20.

[0184] According to some embodiments of this application, this application also provides an electrical device, including a rotating component 200 and a motor 100 of any of the above embodiments, wherein a rotor assembly 20 is fitted and connected to the rotating component 200.

[0185] In some embodiments, the rotating component 200 includes a propeller.

[0186] In some embodiments, the rotating component 200 includes a rotating disk for connecting to a hub.

[0187] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. All technical features and optional technical features of this application can be combined to form new technical solutions.

[0188] To better understand the motor 100 provided in the embodiments of this application, based on the same inventive concept, embodiments of the motor 100 in practical applications are provided here for description.

[0189] This application provides an electric motor 100, which includes a stator assembly 10, a rotor assembly 20, and a rotating shaft 30. The rotor assembly 20 is disposed along a first direction X with the stator assembly 10, and the rotor assembly 20 is used for contact connection with a rotating component 200. The rotating shaft 30 is coaxially disposed with the stator assembly 10 and the rotor assembly 20, and the axis of the rotating shaft 30 is parallel to the first direction X. The rotating shaft 30 is fixedly connected to the rotor assembly 20 and rotatably connected to the stator assembly 10.

[0190] The stator assembly 10 includes a first stator component 11 and a stator housing 12. A rotating shaft 30 is rotatably connected to the first stator component 11. At least a portion of the first stator component 11 is disposed within the stator housing 12, and the first stator component 11 is connected to the stator housing 12. The rotor assembly 20 includes a first rotor component 21 and a second rotor component 23. The rotating shaft 30 is fixedly connected to the first rotor component 21, and the second rotor component 23 is coaxially arranged with the first rotor component 21. The first rotor component 21 is used for contact connection with the rotating component 200.

[0191] The stator housing 12 has a first opening 121 at one end along the first direction X, and a first rotor member 21 is disposed on the side of the first stator member 11 near the first opening 121. The stator housing 12 has a second opening 122 at the other end along the first direction X, and a second rotor member 23 is disposed on the side of the first stator member 11 near the second opening 122. The first rotor member 21 is disposed outside the stator housing 12, and the second rotor member 23 is accommodated inside the stator housing 12.

[0192] The above-described technical solution, by directly bonding the rotor assembly 20 to the rotating component 200, effectively increases the contact area between the motor 100 and the rotating component 200, thereby dispersing working stress and improving the connection reliability between the motor 100 and the rotating component 200, which helps to improve the stability of the rotating body during rotation. Furthermore, it eliminates the need for additional adapter components to improve the connection strength between the shaft 30 and the rotating component 200, helping to reduce the overall structural complexity. In addition, by directly bonding the rotor assembly 20 to the rotating component 200, the rotating component 200 and the motor 100 can be more compact in the axial direction, thereby improving the structural compactness between the motor 100 and the rotating component 200.

[0193] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0194] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electric motor, characterized in that, include: Stator assembly; A rotor assembly is disposed along a first direction with the stator assembly, and the rotor assembly is used for close contact with a rotating component; A rotating shaft is coaxially arranged with the stator assembly and the rotor assembly, and the axis of the rotating shaft is parallel to the first direction. The rotating shaft is fixedly connected to the rotor assembly and rotatably connected to the stator assembly.

2. The motor according to claim 1, characterized in that, The stator assembly includes a first stator component and a stator housing. The rotating shaft is rotatably connected to the first stator component. At least a portion of the first stator component is disposed within the stator housing, and the first stator component is connected to the inner wall of the stator housing.

3. The motor according to claim 2, characterized in that, The rotor assembly includes a first rotor component, the rotating shaft is fixedly connected to the first rotor component, and the first rotor component is used to fit and connect with the rotating component. The stator housing has a first opening at one end along the first direction, and the first rotor component is disposed on the side of the first stator component near the first opening.

4. The motor according to claim 3, characterized in that, The first rotor component is disposed outside the stator housing.

5. The motor according to claim 3, characterized in that, The rotor assembly further includes a second rotor component, which is coaxially arranged with the first rotor component, and the rotating shaft is fixedly connected to the second rotor component. The second rotor component is disposed on the side of the first stator component facing away from the first rotor component along the first direction.

6. The motor according to claim 5, characterized in that, The second rotor component is housed within the stator housing.

7. The motor according to claim 5, characterized in that, The stator housing has a second opening at the other end along the first direction, and the second rotor component is disposed on the side of the first stator component near the second opening.

8. The motor according to claim 7, characterized in that, The second rotor component is used to fit and connect with the rotating component.

9. The motor according to claim 1, characterized in that, The rotor assembly includes a first rotor component and a rotor housing. The rotating shaft is fixedly connected to at least one of the first rotor component and the rotor housing. At least a portion of the first rotor component is disposed within the rotor housing, and the first rotor component is connected to the inner wall of the rotor housing.

10. The motor according to claim 9, characterized in that, The outer wall of the rotor housing is used for fitting and connecting with the rotating component.

11. The motor according to claim 9, characterized in that, The stator assembly includes a first stator component, the rotating shaft is rotatably connected to the first stator component, the rotor housing has a third opening at one end along the first direction, and the first stator component is disposed on the side of the first rotor component near the third opening.

12. The motor according to claim 11, characterized in that, At least a portion of the first stator component is housed within the rotor housing.

13. The motor according to claim 11, characterized in that, The stator assembly further includes a second stator component, the shaft being rotatably connected to the second stator component, the rotor housing having a fourth opening at the other end along the first direction, and the second stator component being disposed on the side of the first rotor component near the fourth opening.

14. The motor according to claim 13, characterized in that, At least a portion of the second stator component is housed within the rotor housing.

15. The motor according to claim 1, characterized in that, The rotor assembly includes a first rotor component, the shaft is fixedly connected to the first rotor component, the first rotor component is provided with a connecting hole, and a portion of the shaft is accommodated in the connecting hole.

16. The motor according to claim 15, characterized in that, In the first direction, the end of the shaft near the first rotor is accommodated within the connecting hole.

17. The motor according to claim 15, characterized in that, In the first direction and in the direction from which the stator assembly points to the rotor assembly, the area of ​​the cross-section of the connecting hole perpendicular to the first direction gradually decreases, and the rotating shaft is in contact with the inner surface of the connecting hole.

18. The motor according to claim 15, characterized in that, The motor further includes a fastener, the connecting hole extends through the first rotor component along the first direction, and the end of the shaft near the first rotor component protrudes from the side surface of the first rotor component away from the stator assembly along the first direction, the fastener connecting the end and the surface.

19. The motor according to claim 1, characterized in that, The rotor assembly is provided with mounting holes for engaging with a fixing member to fix the rotating member to the rotor assembly.

20. The motor according to any one of claims 1-19, characterized in that, The area of ​​the rotor assembly's cross-section perpendicular to the first direction is greater than the area of ​​the stator assembly's cross-section perpendicular to the first direction.

21. An electrical appliance, characterized in that, include: Rotating component; The motor as described in any one of claims 1-20, wherein the rotor assembly is fitted and connected to the rotating component.

22. The electrical appliance according to claim 21, characterized in that, The rotating component includes a propeller.

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