Rotor assembly and electric machine and vehicle having the same

Abstract

The application provides a rotor assembly, a motor with the same and a vehicle, which comprises a first magnet and a second magnet, a first support disc and a second support disc arranged in the axial direction of the rotor assembly, the first magnet is embedded in the first support disc, the second magnet is embedded in the second support disc, and the first support disc and the second support disc are detachably connected. According to the rotor assembly, the axial force borne by a single support disc can be reduced by arranging the first support disc and the second support disc, so that the first support disc and the second support disc can be prevented from being damaged, the service life of the motor is effectively prolonged, meanwhile, the anti-interference capability of the whole rotor assembly can be improved, and the noise of the motor can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle manufacturing technology, and in particular to a rotor assembly, an electric motor having the same, and a vehicle. Background Technology

[0002] In existing motor designs, two stators are typically placed around the rotor assembly to improve motor performance. When the motor is running, the magnets inside the rotor assembly need to work together with the two stators to improve motor performance. However, the axial force transmitted from the magnets to the support plate of this rotor assembly is very large, which can easily lead to damage to the support plate and thus affect the service life of the motor. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a rotor assembly that can improve the service life of an electric motor.

[0004] This application also proposes an electric motor having the aforementioned rotor assembly.

[0005] This application also proposes a vehicle having the aforementioned motor.

[0006] According to an embodiment of the present invention, a rotor assembly includes: a first magnet and a second magnet; a first support disk and a second support disk, wherein the second support disk and the first support disk are arranged axially in the rotor assembly, the first magnet is embedded in the first support disk, the second magnet is embedded in the second support disk, and the first support disk and the second support disk are detachably connected.

[0007] According to the rotor assembly of the present invention, by providing a first support plate and a second support plate, the axial force borne by a single support plate can be reduced, thereby avoiding damage to the first and second support plates, effectively improving the service life of the motor. At the same time, it can increase the overall anti-interference capability of the rotor assembly and effectively reduce the noise of the motor.

[0008] According to some embodiments of the present invention, there are multiple first magnets and multiple second magnets, and the multiple first magnets and multiple second magnets are arranged at circumferential intervals along the rotor assembly.

[0009] According to some alternative embodiments of the present invention, a plurality of first magnets and a plurality of second magnets are arranged alternately along the circumference of the rotor assembly.

[0010] According to some embodiments of the present invention, the first support plate is provided with a plurality of first mounting holes, and a plurality of first magnets are provided in the corresponding first mounting holes; the second support plate is provided with a plurality of second mounting holes, and a plurality of second magnets are provided in the corresponding second mounting holes.

[0011] According to some optional embodiments of the present invention, the first support plate is provided with a first clearance hole, the first clearance hole being directly opposite the second mounting hole in the axial direction of the rotor assembly, and a portion of the second magnet being located within the first clearance hole; and / or, the second support plate is provided with a second clearance hole, the second clearance hole being directly opposite the first mounting hole in the axial direction of the rotor assembly, and a portion of the first magnet being located within the second clearance hole.

[0012] According to some alternative embodiments of the present invention, in the axial direction of the rotor assembly, the two side surfaces of the first magnet are respectively flush with the two side surfaces of the second magnet.

[0013] According to some embodiments of the present invention, the first magnet includes two first magnetic parts stacked in the axial direction of the rotor assembly, and the second magnet includes two second magnetic parts stacked in the axial direction of the rotor assembly; or, the first magnet includes two first magnetic parts stacked in the axial direction of the rotor assembly, and the second magnet is a single piece; or, the first magnet is a single piece, and the second magnet includes two second magnetic parts stacked in the axial direction of the rotor assembly.

[0014] According to some embodiments of the present invention, the first magnet is formed as a fan-shaped ring centered on the central axis of the rotor assembly; and / or, the second magnet is an elongated strip extending radially along the rotor assembly.

[0015] According to some embodiments of the present invention, the two side surfaces of the first magnet in the axial direction of the rotor assembly are first surfaces, the two end faces of the first magnet in the circumferential direction of the rotor assembly are first end faces, and a chamfer is formed between the first end faces and the first surfaces; and / or, the two side surfaces of the second magnet in the axial direction of the rotor assembly are second surfaces, the two end faces of the second magnet in the circumferential direction of the rotor assembly are second end faces, and a chamfer is formed between the second end faces and the second surfaces.

[0016] According to some embodiments of the present invention, the rotor assembly includes a magnetic barrier bar disposed between adjacent first magnets and second magnets.

[0017] According to some optional embodiments of the present invention, the first support plate is provided with a plurality of first mounting holes, a plurality of first magnets correspond one-to-one with the plurality of first mounting holes and are disposed in the corresponding first mounting holes, and the magnetic barrier strip is disposed in the first mounting hole.

[0018] According to some optional embodiments of the present invention, in the circumferential direction of the rotor assembly, both ends of the first magnet are provided with the magnetic barrier strips, and both ends of the first magnet abut against the inner wall of the first mounting hole through the magnetic barrier strips.

[0019] According to some embodiments of the present invention, the first support plate and the second support plate are fastened together.

[0020] According to a second aspect of the present invention, an electric motor includes: a rotor assembly according to a first aspect of the present invention; and two stators, the two stators being respectively disposed on both sides of the rotor assembly in the axial direction.

[0021] According to the present invention, by providing the rotor assembly of the first aspect embodiment described above, and by providing the first support plate and the second support plate, the axial force borne by a single support plate can be reduced, thereby avoiding damage to the first support plate and the second support plate, effectively improving the service life of the motor. At the same time, it can increase the overall anti-interference capability of the rotor assembly and effectively reduce the noise of the motor.

[0022] A vehicle according to a third aspect of the present invention includes a motor according to a second aspect of the present invention.

[0023] According to the present invention, by providing the motor of the second aspect embodiment described above, the rotor assembly of the first aspect described above is provided on the motor. By providing the first support plate and the second support plate, the axial force borne by a single support plate can be reduced, thereby avoiding damage to the first support plate and the second support plate, effectively improving the service life of the motor. At the same time, the overall anti-interference capability of the rotor assembly can be increased, effectively reducing the noise of the motor.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a motor according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A schematic diagram of the rotor assembly shown;

[0027] Figure 3 yes Figure 2 An exploded view of the rotor assembly shown;

[0028] Figure 4 yes Figure 3 A schematic diagram of the first support plate shown;

[0029] Figure 5 yes Figure 3 A schematic diagram of the second support plate shown;

[0030] Figure 6 yes Figure 3 A schematic diagram of the first magnet shown;

[0031] Figure 7 yes Figure 1 A schematic diagram of one embodiment of the motor shown;

[0032] Figure 8 yes Figure 1 A schematic diagram of another embodiment of the motor shown;

[0033] Figure 9 yes Figure 1 A schematic diagram of another embodiment of the motor shown.

[0034] Figure label:

[0035] 100. Rotor assembly;

[0036] 10. First magnet; 11. First magnetic part; 12. First surface; 13. Second end face;

[0037] 20. Second magnet; 21. Second magnetic part;

[0038] 30. First support plate; 31. First mounting hole; 32. First clearance hole;

[0039] 40. Second support plate; 41. Second mounting hole; 42. Second clearance hole;

[0040] 50. Magnetic barrier strips;

[0041] 200. Stator;

[0042] 1000, Electric motor. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] The following is a reference appendix. Figure 1-9A rotor assembly 100 according to an embodiment of the present invention is described.

[0045] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 According to an embodiment of the present invention, the rotor assembly 100 includes: a first magnet 10, a second magnet 20, a first support disk 30, and a second support disk 40.

[0046] Specifically, the second support disk 40 and the first support disk 30 are aligned axially with each other in the rotor assembly 100 (e.g., ...). Figure 1 The first magnet 10 is embedded in the first support disk 30, and the second magnet 20 is embedded in the second support disk 40, and the first support disk 30 and the second support disk 40 are detachably connected.

[0047] For example, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first support disk 30 is disc-shaped, and the second support disk 40 has the same structure as the first support disk 30, and the first support disk 30 and the second support disk 40 are arranged along the axial direction of the rotor assembly 100. Preferably, the first support disk 30 and the second support disk 40 are made of non-magnetic, high-bending-resistance materials, such as aluminum alloy and high-strength plastic, which can prevent the first support disk 30 and the second support disk from becoming magnetized.

[0048] The rotor assembly 100 of the present invention, by providing a first support disk 30 and a second support disk 40, has a first magnet 10 embedded in the first support disk 30 and a second magnet 20 embedded in the second support disk 40. When the motor 1000 is running, the axial force on the first magnet 10 is transmitted to the first support disk 30, and the axial force on the second magnet 20 is transmitted to the second support disk 40. Compared with the prior art, where one support disk simultaneously bears the axial force of the first magnet 10 and the second magnet 20, the rotor assembly 100 of this application can reduce the axial force borne by a single support disk, thereby avoiding damage to the first support disk 30 and the second support disk 40, effectively improving the service life of the first support disk 30 and the second support disk 40, and thus improving the service life of the motor 1000. At the same time, it can reduce the manufacturing difficulty of the first support disk 30 and the second support disk 40.

[0049] In addition, this fixing method can reduce the mechanical coupling between the first magnet 10 and the second magnet 20, reduce the risk of synchronous displacement caused by vibration or impact, and reduce torque pulsation, thereby increasing the overall anti-interference capability of the rotor assembly 100 and reducing the noise of the motor 1000.

[0050] Furthermore, the spacing, angle, or relative position of the first support plate 30 and the second support plate 40 can be flexibly adjusted, thereby optimizing the magnetic field distribution, such as gradient, intensity, or direction, to meet specific application requirements. At the same time, the installation of the first magnet 10 and the second magnet 20 does not affect each other, effectively preventing the first magnet 10 and the second magnet 20 from attracting each other magnetically, thus facilitating the installation of the first magnet 10 and the second magnet 20, and further facilitating the assembly of the rotor assembly 100, thereby improving assembly efficiency.

[0051] According to an embodiment of the present invention, the rotor assembly 100, by providing a first support disk 30 and a second support disk 40, can reduce the axial force borne by a single support disk, thereby avoiding damage to the first support disk 30 and the second support disk 40, effectively improving the service life of the motor 1000. At the same time, it can increase the overall anti-interference capability of the rotor assembly 100 and effectively reduce the noise of the motor 1000.

[0052] According to some embodiments of the present invention, with reference to Figure 2 , Figure 3 and Figure 6 The number of first magnets 10 is multiple, that is, the number of first magnets 10 can be two, three, four or more. The number of second magnets 20 is also multiple, that is, the number of second magnets 20 can be two, three, four or more. The multiple first magnets 10 and the multiple second magnets 20 are arranged at intervals along the circumference of the rotor assembly 100.

[0053] In this way, the multiple first magnets 10 and multiple second magnets 20 work together to precisely adjust the magnetic field strength of the rotor assembly 100 according to actual needs, thereby improving the versatility of the rotor assembly 100. At the same time, by arranging the first magnets 10 and second magnets 20 at circumferential intervals in the rotor assembly 100, the mutual coupling between adjacent first magnets 10 and second magnets 20 can be effectively reduced, thereby avoiding uncontrollable eddy currents or magnetic saturation caused by magnetic field superposition.

[0054] For example, such as Figure 2 , Figure 3 and Figure 6 As shown, the number of first magnets 10 can be eight, and the eight first magnets 10 are arranged at intervals along the circumference of the rotor assembly 100. The number of second magnets 20 is nine, and the nine second magnets 20 are arranged at intervals along the circumference of the rotor assembly 100. The eight first magnets 10 and the nine second magnets 20 are arranged at intervals along the circumference of the rotor assembly 100.

[0055] According to some optional embodiments of the present invention, refer to Figure 2 and Figure 3Multiple first magnets 10 and multiple second magnets 20 are arranged alternately along the circumference of the rotor assembly 100. Therefore, there is no need to verify the arrangement of the first magnets 10 and the second magnets 20, which facilitates the installation of the first magnets 10 and the second magnets 20. At the same time, it optimizes the magnetic field distribution, reduces harmonics and torque pulsation, and thus ensures the stability of the magnetic field of the motor 1000.

[0056] According to some embodiments of the present invention, with reference to Figure 3 , Figure 4 and Figure 5 The first support plate 30 is provided with a plurality of first mounting holes 31, that is, the first support plate 30 may be provided with two, three or four or more first mounting holes 31, and the plurality of first magnets 10 correspond one-to-one with the plurality of first mounting holes 31 and are disposed in the corresponding first mounting holes 31; the second support plate 40 is provided with a plurality of second mounting holes 41, that is, the second support plate 40 may be provided with two, three or four or more second mounting holes 41, and the plurality of second magnets 20 correspond one-to-one with the plurality of second mounting holes 41 and are disposed in the corresponding second mounting holes 41.

[0057] In this way, each first magnet 10 and each second magnet 20 can be installed in a corresponding position without having to consider whether the installation position of the first magnet 10 or the second magnet 20 is correct, thereby improving the installation efficiency of the rotor assembly 100.

[0058] For example, such as Figure 3 , Figure 4 and Figure 5 As shown, the first support plate 30 is provided with eight first mounting holes 31, and each first mounting hole 31 contains a first magnet 10. The second support plate 40 is provided with nine second mounting holes 41, and each second mounting hole 41 contains a second magnet 20.

[0059] According to some embodiments of the present invention, with reference to Figure 3 , Figure 4 and Figure 5 The first support plate 30 is provided with a first clearance hole 32, which is directly opposite to the second mounting hole 41 in the axial direction of the rotor assembly 100. A portion of the second magnet 20 is located within the first clearance hole 32. Therefore, when the second magnet 20 is fixed in the second mounting hole 41 of the second support plate 40, a portion of the second magnet 20 can be placed within the first clearance hole 32 when the first support plate 30 and the second support plate 40 are joined together. This ensures the thickness of the second magnet 20 in the axial direction of the rotor assembly 100, thereby ensuring the magnetic field strength of the rotor assembly 100.

[0060] Furthermore, such as Figure 3 , Figure 4 and Figure 5 As shown, the second support plate 40 is provided with a second clearance hole 42, which is directly opposite to the first mounting hole 31 in the axial direction of the rotor assembly 100. A portion of the first magnet 10 is located within the second clearance hole 42. Thus, when the first magnet 10 is fixed in the first mounting hole 31 of the first support plate 30, and the first support plate 30 and the second support plate 40 are spliced ​​together, a portion of the first magnet 10 can be placed within the second clearance hole 42, thereby ensuring the thickness of the first magnet 10 in the axial direction of the rotor assembly 100, and thus ensuring the magnetic field strength of the rotor assembly 100.

[0061] For example, such as Figure 3 , Figure 4 and Figure 5 As shown, the first support plate 30 is provided with a first clearance hole 32, which is directly opposite to the second mounting hole 41 in the axial direction of the rotor assembly 100, and the first clearance hole 32 and the second mounting hole 41 have the same hole shape and diameter. The second support plate 40 is provided with a second clearance hole 42, which is directly opposite to the first mounting hole 31 in the axial direction of the rotor assembly 100, and the second clearance hole 42 and the first mounting hole 31 have the same hole shape and diameter.

[0062] According to some optional embodiments of the present invention, refer to Figure 3 , Figure 4 and Figure 5 Along the axial direction of the rotor assembly 100, the two side surfaces of the first magnet 10 are flush with the two side surfaces of the second magnet 20. Therefore, when the rotor assembly 100 and the stator 200 are installed together, the first magnet 10 or the second magnet 20 can be prevented from protruding, thus avoiding interference with the installation of the rotor assembly 100 and the stator 200. This ensures that the rotor assembly 100 and the stator 200 can be properly assembled, and also ensures the stability of the magnetic field gradient.

[0063] According to some embodiments of the present invention, with reference to Figure 2 and Figure 7 The first magnet 10 includes two first magnetic parts 11 stacked axially on the rotor assembly 100, and the second magnet 20 includes two second magnetic parts 21 stacked axially on the rotor assembly 100. Thus, the first magnetic parts 11 and 21 on the same side cooperate with the adjacent stator 200 to form a complete magnetic circuit, and the first magnetic parts 11 and 21 on the other side cooperate with the adjacent stator 200 to form another complete magnetic circuit. Therefore, the double-layer magnetic circuit can fully utilize the energy efficiency of the motor 1000 and effectively ensure the energy utilization rate of the motor 1000.

[0064] For example, such as Figure 2 and Figure 7As shown, the first magnet 10 includes two first magnetic parts 11 arranged in an axially stacked manner, and the two first magnetic parts 11 are fixedly connected to each other. The second magnet 20 includes two second magnetic parts 21 arranged in an axially stacked manner, and the two second magnetic parts 21 are fixedly connected to each other.

[0065] Furthermore, such as Figure 2 and Figure 8 As shown, the first magnet 10 includes two first magnetic parts 11 stacked axially in the rotor assembly 100, and the second magnet 20 is a single piece. This ensures that the rotor assembly 100 can form a complete magnetic circuit with the corresponding stator 200, and eliminates the need for further processing of the second magnet 20, thereby reducing processing steps and improving processing efficiency.

[0066] For example, such as Figure 2 and Figure 8 As shown, the first magnet 10 includes two first magnetic parts 11 arranged in an axially stacked manner, and the two first magnetic parts 11 are fixedly connected to each other. The second magnet 20 is an integral piece.

[0067] It should be noted that, as Figure 8 As shown, the magnetization direction of the first magnet 10 is axial, and the magnetization direction of the second magnet 20 is circumferential. Adjacent first magnets 10 have opposite magnetization directions, and adjacent second magnets 20 also have opposite magnetization directions. Figure 8 The dashed line in the middle represents the magnetic circuit.

[0068] Furthermore, such as Figure 2 and Figure 9 As shown, the first magnet 10 is a single piece, and the second magnet 20 includes two second magnetic parts 21 stacked axially on the rotor assembly 100. This ensures that the rotor assembly 100 can form a complete magnetic circuit with the corresponding stator 200, without requiring further processing of the first magnet 10, thus reducing processing steps and improving processing efficiency.

[0069] For example, such as Figure 2 and Figure 9 As shown, the first magnet 10 is a single unit, and the second magnet 20 includes two second magnetic parts 21 arranged in an axially stacked manner, with the two second magnetic parts 21 fixedly connected to each other.

[0070] It should be noted that, as Figure 9 As shown, the magnetization direction of the first magnet 10 is axial, and the magnetization direction of the second magnet 20 is circumferential. Adjacent first magnets 10 have opposite magnetization directions, and adjacent second magnets 20 also have opposite magnetization directions. Figure 9 The dashed line in the middle represents the magnetic circuit.

[0071] According to some embodiments of the present invention, with reference to Figure 2 , Figure 3 and Figure 6The first magnet 10 is formed as a fan-shaped ring with the central axis of the rotor assembly 100 as the center. Therefore, this structure of the first magnet 10 is convenient to arrange on the first support disk 30, so that the area of ​​the first magnet 10 can be guaranteed in a limited space, and at the same time, the rotor assembly 100 can have sufficient magnetic flux density, thereby ensuring that the motor 1000 can operate stably under high speed or high load conditions.

[0072] Furthermore, referring to Figure 2 and Figure 3 The second magnet 20 is an elongated strip extending radially along the rotor assembly 100. Therefore, the second magnet 20 has a simple structure and is easy to manufacture. Furthermore, the second magnet 20 allows for further adjustment of the magnetic flux of the rotor assembly 100, thereby optimizing the magnetic field distribution and ensuring the magnetic field stability of the motor 1000. Moreover, the structural design of the first magnet 10 and the second magnet 20 can reduce the manufacturing cost of the rotor assembly 100 while ensuring the magnetic field strength of the rotor assembly 100, thus meeting the requirements for low-cost production.

[0073] According to some embodiments of the present invention, with reference to Figure 2 , Figure 3 and Figure 6 The first magnet 10 has two axial surfaces on both sides of the rotor assembly 100 as first surfaces 12, and two circumferential end faces of the first magnet 10 as first end faces. A chamfer is formed between the first end faces and the first surfaces 12. This chamfer facilitates the installation of the first magnet 10 within the first mounting hole 31, thereby improving the assembly efficiency of the rotor assembly 100. Simultaneously, it prevents the circumferential ends of the first magnet 10 from colliding and being damaged by the hole wall of the first mounting hole 31, thus protecting the first magnet 10.

[0074] For example, such as Figure 2 , Figure 3 and Figure 6 As shown, the two sides of the first magnet 10 in the left-right direction are the first surface 12, and the two ends of the first magnet 10 in the circumferential direction are the first end face. The chamfer is set at the position adjacent to the first surface 12 and the first end face.

[0075] Furthermore, such as Figure 2 and Figure 3As shown, the two axial surfaces of the second magnet 20 in the rotor assembly 100 are called second surfaces, and the two circumferential end faces of the second magnet 20 in the rotor assembly 100 are called second end faces 13. A chamfer is formed between the second end faces 13 and the second surfaces. This chamfer facilitates the installation of the second magnet 20 in the second mounting hole 41, thereby improving the assembly efficiency of the rotor assembly 100. Simultaneously, it prevents the circumferential ends of the second magnet 20 from colliding and being damaged by the hole wall of the second mounting hole 41, thus protecting the second magnet 20.

[0076] According to some embodiments of the present invention, with reference to Figure 2 and Figure 3 The rotor assembly 100 includes a magnetic barrier bar 50, which is disposed between adjacent first magnets 10 and second magnets 20. Thus, the magnetic barrier bar can shield magnetic field interference between adjacent first magnets 10 and second magnets 20, thereby ensuring the stability of the magnetic field and consequently ensuring the stability of the motor 1000's operation.

[0077] According to some optional embodiments of the present invention, refer to Figure 3 and Figure 4 The first support plate 30 has multiple first mounting holes 31, and multiple first magnets 10 correspond one-to-one with the multiple first mounting holes 31 and are disposed within the corresponding first mounting holes 31. Magnetic barrier strips 50 are disposed within the first mounting holes 31. Therefore, the first mounting holes 31 provide mounting positions for the magnetic barrier strips 50, facilitating their installation, and also improving the functional integration of the first mounting holes 31. For example, as... Figure 3 and Figure 4 As shown, taking one of the first mounting holes 31 as an example, the magnetic barrier strips 50 are disposed at both ends of the first mounting hole 31 in the circumferential direction.

[0078] According to some optional embodiments of the present invention, refer to Figure 2 and Figure 3 In the circumferential direction of the rotor assembly 100, magnetic barrier strips 50 are provided at both ends of the first magnet 10, and both ends of the first magnet 10 abut against the inner wall of the first mounting hole 31 through the magnetic barrier strips 50. This ensures that the magnetic barrier strips 50 effectively shield the magnetic field interference between adjacent first magnets 10 and second magnets 20, and simultaneously ensures the stability of the first magnet 10 within the first mounting hole 31, effectively preventing the first magnet 10 from shaking within the first mounting hole 31, thereby ensuring the stability of the magnetic field of the rotor assembly 100.

[0079] For example, such as Figure 2 and Figure 3As shown, each first magnet 10 is provided with magnetic barrier strips 50 on both sides in the circumferential direction within the first mounting hole 31, which can facilitate the installation of the magnetic barrier strips 50 and shield adjacent first magnets 10 and second magnets 20.

[0080] It should be explained that the two ends of the first magnet 10 are interference-fitted with the hole walls defined by the magnetic barrier strips 50 on both sides, which can facilitate the installation of the first magnet 10 in the first mounting hole 31 and ensure the stability of the first magnet 10 fixed in the first mounting hole 31.

[0081] According to some embodiments of the present invention, with reference to Figure 2 and Figure 3 The first support plate 30 and the second support plate 40 are fastened together. This connection method is simple to implement and easy to operate, thereby improving the assembly efficiency of the rotor assembly 100. It also facilitates maintenance and parts replacement of the rotor assembly 100. It should be noted that the fastening connection can be achieved through bolted connections, pin connections, or connections via couplings, etc.

[0082] According to a second aspect embodiment of the present invention, the motor 1000, with reference to Figure 1 , Figure 2 and Figure 3 It includes: a rotor assembly 100 of the first aspect of this embodiment; and two stators 200, which are respectively disposed on both sides of the rotor assembly 100 in the axial direction.

[0083] It should be noted that there is an air gap between the rotor assembly 100 and the stators 200 on both sides. The air gap needs to be as small as possible so as not to affect the magnetic force of the rotor assembly 100 and effectively ensure the output power of the motor 1000.

[0084] According to an embodiment of the present invention, the motor 1000, by providing the rotor assembly 100 of the first aspect embodiment described above, and by providing the first support disk 30 and the second support disk 40, can reduce the axial force borne by a single support disk, thereby avoiding damage to the first support disk 30 and the second support disk 40, effectively improving the service life of the motor 1000. At the same time, it can increase the overall anti-interference capability of the rotor assembly 100 and effectively reduce the noise of the motor 1000.

[0085] The vehicle according to a third aspect embodiment of the present invention, referring to Figure 1 , Figure 2 and Figure 3 This includes the motor 1000 of the second aspect of this embodiment.

[0086] According to an embodiment of the present invention, by providing the motor 1000 of the second aspect embodiment described above, and by providing the rotor assembly 100 of the first aspect on the motor 1000, and by providing the first support plate 30 and the second support plate 40, the axial force borne by a single support plate can be reduced, thereby avoiding damage to the first support plate 30 and the second support plate 40, effectively improving the service life of the motor 1000, and at the same time, increasing the overall anti-interference capability of the rotor assembly 100, effectively reducing the noise of the motor 1000.

[0087] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0089] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0091] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotor assembly (100), characterized in that, include: First magnet (10) and second magnet (20); A first support disk (30) and a second support disk (40) are arranged axially on the rotor assembly (100) with the second support disk (40) and the first support disk (30). The first magnet (10) is embedded in the first support disk (30), and the second magnet (20) is embedded in the second support disk (40). The first support disk (30) and the second support disk (40) are detachably connected.

2. The rotor assembly (100) according to claim 1, characterized in that, The number of first magnets (10) is multiple, the number of second magnets (20) is multiple, and the multiple first magnets (10) and the multiple second magnets (20) are arranged at circumferential intervals along the rotor assembly (100).

3. The rotor assembly (100) according to claim 2, characterized in that, Multiple first magnets (10) and multiple second magnets (20) are arranged alternately along the circumference of the rotor assembly (100).

4. The rotor assembly (100) according to claim 2, characterized in that, The first support plate (30) is provided with a plurality of first mounting holes (31), and a plurality of first magnets (10) correspond one-to-one with the plurality of first mounting holes (31) and are disposed in the corresponding first mounting holes (31); The second support plate (40) is provided with a plurality of second mounting holes (41), and a plurality of second magnets (20) correspond one-to-one with the plurality of second mounting holes (41) and are disposed in the corresponding second mounting holes (41).

5. The rotor assembly (100) according to claim 4, characterized in that, The first support plate (30) is provided with a first clearance hole (32), which is directly opposite the second mounting hole (41) in the axial direction of the rotor assembly (100). A portion of the second magnet (20) is located within the first clearance hole (32). And / or, the second support plate (40) is provided with a second clearance hole (42), which is directly opposite the first mounting hole (31) in the axial direction of the rotor assembly (100), and a portion of the first magnet (10) is located in the second clearance hole (42).

6. The rotor assembly (100) according to claim 5, characterized in that, In the axial direction of the rotor assembly (100), the two side surfaces of the first magnet (10) are flush with the two side surfaces of the second magnet (20).

7. The rotor assembly (100) according to claim 2, characterized in that, The first magnet (10) includes two first magnetic parts (11) stacked axially in the rotor assembly (100), and the second magnet (20) includes two second magnetic parts (21) stacked axially in the rotor assembly (100); or, The first magnet (10) includes two first magnetic parts (11) stacked axially on the rotor assembly (100), and the second magnet (20) is a single piece; or, The first magnet (10) is a single piece, and the second magnet (20) includes two second magnetic parts (21) stacked axially on the rotor assembly (100).

8. The rotor assembly (100) according to claim 2, characterized in that, The first magnet (10) is formed as a fan-shaped ring with the central axis of the rotor assembly (100) as the center; and / or, the second magnet (20) is an elongated strip extending radially along the rotor assembly (100).

9. The rotor assembly (100) according to claim 2, characterized in that, The first magnet (10) has two axial surfaces on both sides of the rotor assembly (100) as first surfaces (12), and the first magnet (10) has two circumferential end faces on both ends of the rotor assembly (100) as first end faces. A chamfer is formed between the first end face and the first surface (12). And / or, the two sides of the second magnet (20) in the axial direction of the rotor assembly (100) are the second surfaces, and the two end faces of the second magnet (20) in the circumferential direction of the rotor assembly (100) are the second end faces (13), and a chamfer is formed between the second end faces (13) and the second surfaces.

10. The rotor assembly (100) according to claim 2, characterized in that, include: A magnetic barrier strip (50) is disposed between adjacent first magnets (10) and second magnets (20).

11. The rotor assembly (100) according to claim 10, characterized in that, The first support plate (30) is provided with a plurality of first mounting holes (31), and a plurality of first magnets (10) correspond one-to-one with the plurality of first mounting holes (31) and are disposed in the corresponding first mounting holes (31). The magnetic barrier strip (50) is disposed in the first mounting hole (31).

12. The rotor assembly (100) according to claim 11, characterized in that, In the circumferential direction of the rotor assembly (100), both ends of the first magnet (10) are provided with magnetic barrier strips (50), and both ends of the first magnet (10) abut against the inner wall of the first mounting hole (31) through the magnetic barrier strips (50).

13. The rotor assembly (100) according to claim 1, characterized in that, The first support plate (30) is fastened to the second support plate (40).

14. An electric motor (1000), characterized in that, include: The rotor assembly (100) according to any one of claims 1-13; The stator (200) is two in number, and the two stators (200) are respectively disposed on both sides of the rotor assembly (100) in the axial direction.

15. A vehicle, characterized in that, Includes the motor (1000) as described in claim 14.

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