Rotor, axial flux motor and vehicle

Abstract

The utility model provides a rotor, an axial magnetic flux motor and a vehicle. The rotor comprises magnetic steel, a rotor disc and separation strips. The rotor disc is provided with an annular groove, and the annular groove is used for accommodating the magnetic steel and limiting the magnetic steel in the radial direction of the rotor disc. And the separation strips are arranged in the annular groove, are arranged at intervals along the circumferential direction of the rotor disc, and are used for limiting the magnetic steel along the circumferential direction. And in the circumferential direction, one of the magnetic steel and the separation strip at least partially protrudes to the other one of the magnetic steel and the separation strip. According to the rotor provided by the utility model, the magnetic steel and the rotor disc are limited sufficiently along the radial direction, so that the magnetic steel can be prevented from being separated from the rotor disc when the rotor rotates at a high speed, structures such as a sheath do not need to be additionally assembled, the axial size of the motor is reduced, and the assembly of the motor is simplified.

Description

Technical Field

[0001] The utility model generally relates to the technical field of motors, and more specifically to a rotor, an axial flux motor and a vehicle. Background Art

[0002] At present, the existing axial flux motor adopts the design of rotor core with rotor pressure plate and fixing components. Although it improves the reliability of high-speed operation of the rotor, it increases the axial size of the motor, resulting in a larger weight of the motor, increased magnetic steel leakage, and reduced magnetic steel utilization. In addition, in order to prevent the magnetic steel from being thrown out in the radial direction when the rotor is at high speed, additional structures such as sheaths need to be installed, which increases the assembly complexity of the motor. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to at least partially solve the above problems, the utility model provides a rotor in a first aspect, comprising:

[0005] magnetic steel;

[0006] A rotor disk, wherein the rotor disk is provided with an annular groove, wherein the annular groove is used to accommodate the magnetic steel and limit the magnetic steel along the radial direction of the rotor disk; and

[0007] A separator bar, wherein the separator bar is disposed in the annular groove, and the separator bars are arranged at intervals along the circumferential direction of the rotor disk, and are used to limit the magnetic steel along the circumferential direction;

[0008] Wherein, along the circumferential direction, one of the magnetic steel and the partition bar at least partially protrudes toward the other of the magnetic steel and the partition bar.

[0009] According to the rotor of the first aspect of the utility model, the setting of the annular groove limits the magnetic steel in the radial direction, which is beneficial to prevent the magnetic steel from detaching from the rotor disk, and the dividing strip limits the magnetic steel in the circumferential direction, further strengthening the firmness of the magnetic steel and the rotor disk; in addition, the protrusion setting between the dividing strip and the magnetic steel enables the dividing strip to limit the magnetic steel in the radial direction, so there is sufficient limitation between the magnetic steel and the rotor disk in the radial direction, preventing the magnetic steel from detaching from the rotor disk when the rotor rotates at high speed, and no additional structures such as the sheath are required, which not only reduces the axial size of the motor, but also simplifies the assembly of the motor.

[0010] Optionally, the partition bar is provided with a protruding portion, and the magnetic steel is provided with a recessed portion, and the protruding portion extends along the circumferential direction to the recessed portion, so that the magnetic steel is embedded in the partition bar.

[0011] Optionally, the magnetic steel is provided with a protruding portion, and the partition bar is provided with a recessed portion, and the protruding portion extends to the recessed portion along the circumferential direction so that the magnetic steel is embedded in the partition bar.

[0012] Optionally, the protrusion includes a first protrusion and a second protrusion, and the first protrusion and the second protrusion are arranged on both sides of the dividing strip along the circumferential direction; the recessed portion includes a first recessed portion and a second recessed portion, and the first recessed portion and the second recessed portion are arranged on both sides of the magnetic steel along the circumferential direction.

[0013] Optionally, the protrusion includes a first protrusion and a second protrusion, and the first protrusion and the second protrusion are arranged at intervals along the radial direction; the recessed portion includes a first recessed portion and the second recessed portion, and the first recessed portion and the second recessed portion are arranged at intervals along the radial direction.

[0014] Optionally, the rotor includes multiple layers of magnetic steel, and the multiple layers of magnetic steel are arranged along the axial direction of the rotor disk.

[0015] Optionally, the multi-layer magnetic steel includes a first magnetic steel and a second magnetic steel, the first magnetic steel is provided with a first recessed portion, the second magnetic steel is provided with a second recessed portion, and the first recessed portion and the second recessed portion are spaced apart along the circumferential direction; the first protrusion and the second protrusion are respectively provided on both sides of the dividing strip, the first protrusion cooperates with the first recessed portion, and the second protrusion cooperates with the second recessed portion.

[0016] Optionally, the rotor disk comprises:

[0017] The disc; and

[0018] A flange portion is arranged at the edge of the disk body and protrudes from the disk body, and the flange portion extends along the circumferential direction.

[0019] Optionally, the rotor disk further includes a boss portion, which is arranged in the middle of the disk body and protrudes from the disk body, and the flange portion is spaced apart from the boss portion along the radial direction to form the annular groove on the disk body; along the axial direction of the rotor disk, the distance that the flange portion protrudes from the disk body is not less than the distance that the boss portion protrudes from the disk body.

[0020] Optionally, along the axial direction, a distance by which the magnetic steel protrudes from the flange portion is smaller than a size of a single layer of the magnetic steel.

[0021] Optionally, the number of layers of the magnetic steel is n, the distance that the flange protrudes from the disk body is h, the layer height of the multiple layers of the magnetic steel is d, and (n-1)*d / n<h≤d.

[0022] A second aspect of the utility model provides an axial flux motor, comprising the rotor and stator according to the above, wherein the rotor is arranged on both sides of the stator along the axial direction of the motor.

[0023] The axial flux motor according to the second aspect of the utility model has a small axial size and is easy to assemble.

[0024] A third aspect of the utility model provides a vehicle, comprising the axial flux motor according to the above.

[0025] The vehicle according to the third aspect of the utility model adopts an axial flux motor with a small axial dimension and high space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0027] Figure 1 A three-dimensional schematic diagram of a rotor disk of a rotor according to a preferred embodiment of the utility model;

[0028] Figure 2 This is a three-dimensional schematic diagram of the magnetic steel of the rotor according to a preferred embodiment of the utility model;

[0029] Figure 3 A three-dimensional schematic diagram of a rotor disk of a rotor according to another preferred embodiment of the utility model;

[0030] Figure 4 This is a three-dimensional schematic diagram of a first magnetic steel of a rotor in another preferred embodiment of the utility model;

[0031] Figure 5 This is a three-dimensional schematic diagram of a second magnetic steel of a rotor according to another preferred embodiment of the utility model;

[0032] Figure 6 It is a three-dimensional schematic diagram of the rotor and stator of an axial flux motor according to a preferred embodiment of the utility model.

[0033] Description of Reference Numerals

[0034] 100: stator 110: rotor

[0035] 120: Magnetic steel 121: Recessed part

[0036] 122: first recessed portion 123: second recessed portion

[0037] 130: rotor disk 131: disk body

[0038] 132: boss portion 133: flange portion

[0039] 134: Ring groove 140: Separator strip

[0040] 141: protrusion 142: first protrusion

[0041] 143: second protrusion 124: first magnetic steel

[0042] 125: Second magnetic steel D1: Axial direction

[0043] D2: Circumferential direction D3: Radial direction DETAILED DESCRIPTION

[0044] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0045] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0046] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0047] In this document, “equal”, “same”, etc. are not strictly limited in mathematical and / or geometric senses, but also include errors that can be understood by those skilled in the art and allowed by manufacturing or use.

[0048] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0049] First embodiment

[0050] Figure 1 and Figure 2A rotor 110 according to the present invention is shown, and the rotor 110 includes a magnetic steel 120, a rotor disk 130, and a separator bar 140. The rotor disk 130 is provided with an annular groove 134, and the annular groove 134 is used to accommodate the magnetic steel 120 and limit the magnetic steel 120 along the radial direction D3 of the rotor disk 130. The separator bar 140 is arranged in the annular groove 134, and the separator bar 140 is arranged at intervals along the circumferential direction D2 of the rotor disk 130, and is used to limit the magnetic steel 120 along the circumferential direction D2.

[0051] In this case, along the circumferential direction D2 of the rotor disk 130 , one of the magnetic steel 120 or the separation bar 140 at least partially protrudes toward the other of the magnetic steel 120 or the separation bar 140 .

[0052] According to the rotor 110 of the utility model, the setting of the annular groove 134 limits the magnetic steel 120 in the radial direction D3, which is conducive to preventing the magnetic steel 120 from being separated from the rotor disk 130, and the separation bar 140 limits the magnetic steel 120 in the circumferential direction D2, further strengthening the firmness of the magnetic steel 120 and the rotor disk 130. In addition, the protrusion between the separation bar 140 and the magnetic steel 120 allows the separation bar 140 to limit the magnetic steel 120 in the radial direction D3, so that there is sufficient limit between the magnetic steel 120 and the rotor disk 130 in the radial direction D3, preventing the magnetic steel 120 from being separated from the rotor disk 130 when the rotor 110 rotates at a high speed, and no additional structures such as a sleeve need to be assembled, which not only reduces the axial size of the motor, but also simplifies the assembly of the motor.

[0053] The first end of the partition bar 140 is close to the center of the rotor disk 130, and the second end of the partition bar 140 is close to the outer side of the rotor disk 130, so that the annular groove 134 can be separated to form a plurality of slots for accommodating each magnetic steel 120. Of course, if the magnetic steel 120 is in the shape of a fan-shaped block, the partition bar 140 can also be configured to extend along the radial direction D3. It can be understood that the arrangement of the partition bar 140 separating the magnetic steel 120 in the rotor disk 130 and forming the slots of the magnetic steel 120 should be within the protection scope of the present utility model.

[0054] Reference Figure 1The rotor disk 130 includes a disk body 131, a boss portion 132 and a flange portion 133. The disk body 131 is circular, and a through hole for passing the motor shaft is provided in the middle of the disk body 131. The boss portion 132 is provided in the middle of the disk body 131 and protrudes from one side of the disk surface of the disk body 131 along the axial direction D1. The cross section of the boss portion 132 perpendicular to the axial direction D1 is annular, and the boss portion 132 is coaxial with the disk body 131. The flange portion 133 is provided at the edge of the disk body 131 and protrudes from the disk body 131 along the axial direction D1. The flange portion 133 extends along the circumferential direction D2, and the flange portion 133 is spaced apart from the flange portion 133 along the radial direction D3 to form an annular groove 134 in the disk body 131. The magnet 120 is disposed in the annular groove 134 formed by the boss portion 132 and the flange portion 133. The boss portion 132 and the flange portion 133 are located on both sides of the magnet 120 along the radial direction D3, and have a limiting effect on the magnet 120. In particular, when the motor rotates, the magnet 120 has a tendency to move toward the flange portion 133 under the action of centrifugal force, and the flange portion 133 has a limiting effect on the magnet 120, thereby preventing the magnet 120 from detaching from the disk body 131.

[0055] Further, along the axial direction D1 of the rotor disk 130, the distance that the flange portion 133 protrudes from the disk body 131 is not less than the distance that the boss portion 132 protrudes from the disk body 131, so that the flange portion 133 has a sufficient limiting effect on the magnetic steel 120, further preventing the magnetic steel 120 from being separated from the disk body 131. Optionally, the distance that the flange portion 133 protrudes from the disk body 131 is twice or more than the distance that the boss portion 132 protrudes from the disk body 131.

[0056] Optionally, refer to Figure 1 and Figure 2 , the separator bar 140 is provided with a protrusion 141, and the magnetic steel 120 is provided with a recessed portion 121, and the protrusion 141 extends to the recessed portion 121 along the circumferential direction D2, so that the magnetic steel 120 and the separator bar 140 are embedded. The arrangement of the protrusion 141 and the recessed portion 121 allows the separator bar 140 and the magnetic steel 120 to have a limit along the radial direction D3. In detail, the protrusion 141 includes a first protrusion 142 and a second protrusion 143, and the first protrusion 142 and the second protrusion 143 are arranged on both sides of the separator bar 140 along the circumferential direction D2. The recessed portion 121 includes a first recessed portion 122 and a second recessed portion 123, and the first recessed portion 122 and the second recessed portion 123 are arranged on both sides of the magnetic steel 120 along the circumferential direction D2, so that both sides of the magnetic steel 120 along the radial direction D3 are limited by the separator bar 140, and the structure is stable.

[0057] Further, see Figure 1 and Figure 2The first protrusion 142 and the second protrusion 143 are arranged at intervals along the radial direction D3, and the first recessed portion 122 and the second recessed portion 123 are arranged at intervals along the radial direction D3, so that the magnetic steel 120 is subject to two limiting effects along the radial direction D3, which is beneficial to prevent the magnetic steel 120 from detaching.

[0058] In addition, as one of the alternative solutions, the magnetic steel 120 may be provided with a protrusion 141, and the dividing strip 140 may be provided with a recessed portion 121, and the protrusion 141 may extend to the recessed portion 121 along the circumferential direction D2 so that the magnetic steel 120 and the dividing strip 140 are interlocked, and a limit may be provided between the dividing strip 140 and the magnetic steel 120 along the radial direction D3.

[0059] In detail, the protrusion 141 includes a first protrusion 142 and a second protrusion 143, and the first protrusion 142 and the second protrusion 143 are arranged on both sides of the partition bar 140 and the magnetic steel 120 along the circumferential direction D2. The recessed portion 121 includes a first recessed portion 122 and a second recessed portion 123, and the first recessed portion 122 and the second recessed portion 123 are arranged on both sides of the magnetic steel 120 and the partition bar 120 along the circumferential direction D2, so that both sides of the magnetic steel 120 along the radial direction D3 are limited by the partition bar 140, and the structure is stable. The first protrusion 142 and the second protrusion 143 are arranged at intervals along the radial direction D3, and the first recessed portion 122 and the second recessed portion 123 are arranged at intervals along the radial direction D3, so that the magnetic steel 120 is limited by two positions along the radial direction D3, which is conducive to preventing the magnetic steel 120 from detaching. In addition, the first protrusion 142 and the second protrusion 143 are arranged at intervals along the radial direction D3, and the first recess 122 and the second recess 123 are arranged at intervals along the radial direction D3, so that the magnetic steel 120 is subject to two limiting effects along the radial direction D3, which helps to prevent the magnetic steel 120 from detaching.

[0060] Optionally, the magnetic steel 120 is fixed to the disk body 131 by adhesive, which reduces the difficulty of assembly, and the adhesive fixation is sufficient to meet the limiting requirements of the magnetic steel 120 and the disk body 131 along the axial direction D1.

[0061] Second embodiment

[0062] The rotor 110 according to the second embodiment is different from the rotor 110 according to the first embodiment mainly in that the rotor 110 includes a plurality of layers of magnetic steel 120 along the axial direction D1 and the rotor disk 130 is not provided with a boss portion 132 .

[0063] For details, refer to Figures 3 to 5The rotor disk 130 includes a disk body 131 and a flange portion 133. The flange portion 133 is arranged at the edge of the disk body 131 and protrudes from the disk body 131 along the axial direction D1. The flange portion 133 extends along the circumferential direction D2. The multi-layered magnetic steel 120 is arranged in the annular groove 134 formed by the inner side of the flange portion 133 and the disk body 131. The flange portion 133 is located on the outer side of the magnetic steel 120 along the radial direction D3, which has a limiting effect on the magnetic steel 120, cancels the setting of the boss portion 132, and is conducive to reducing the cost of the rotor. When the motor rotates, the magnetic steel 120 has a tendency to move toward the flange portion 133 under the action of centrifugal force, and the flange portion 133 has a limiting effect on the magnetic steel 120, thereby preventing the magnetic steel 120 from separating from the disk body 131.

[0064] Furthermore, the rotor 110 according to the present invention includes multiple layers of magnetic steel 120, and the multiple layers of magnetic steel 120 are arranged along the axial direction D1. The arrangement of multiple layers of magnetic steel 120 is suitable for installing the rotor 110 of an axial motor with different axial sizes.

[0065] Furthermore, along the axial direction D1 , the distance that the magnetic steel 120 protrudes from the flange portion 133 is smaller than the size of a single layer of the magnetic steel 120 , so that the outermost magnetic steel 120 is also limited by the flange portion 133 , thereby preventing the outermost magnetic steel 120 from separating from the rotor disk 130 . Specifically, the number of layers of the magnet 120 is n, the distance that the flange 133 protrudes from the disk body 131 along the axial direction D1 is h, and the layer height of the multi-layer magnet 120 (that is, the size of the multi-layer magnet 120 along the axial direction D1) is d. The number of layers n of the magnet 120, the distance h that the flange 133 protrudes from the disk body 131, and the layer height d of the multi-layer magnet 120 satisfy the relationship: (n-1)*d / n<h≤d, so that only a small part of the outermost part of the magnet 120 of the annular groove 134 will not be limited by the flange 133, thereby ensuring the limiting effect of the flange 133 on the magnet 120.

[0066] Further, see Figures 3 to 5 The multi-layer magnetic steel 120 includes a first magnetic steel 124 and a second magnetic steel 125 , and the first magnetic steel 124 and the second magnetic steel 125 are arranged along the axial direction D1 , thereby forming the multi-layer magnetic steel 120 .

[0067] The first magnetic steel 124 is provided with a first recessed portion 122, and the second magnetic steel 125 is provided with a second recessed portion 123. When the first magnetic steel 124 and the second magnetic steel 125 are installed between adjacent dividing bars 140, the first magnetic steel 124 and the second magnetic steel 125 are respectively embedded with two adjacent dividing bars 140. Specifically, the first recessed portion 123 of the first magnetic steel 124 and the second recessed portion 124 of the second magnetic steel 125 are spaced apart along the circumferential direction D2. The first protrusion 142 and the second protrusion 143 are respectively provided on both sides of the dividing bar 140. The first protrusion 142 of one of the adjacent dividing bars 140 matches with the first recessed portion 122 of the first magnetic steel 124, and the second protrusion 143 of the other dividing bar 140 matches with the second recessed portion 123 of the second magnetic steel 125. Along the circumferential direction D2 , the multiple layers of magnetic steel 120 and the separation bars 140 are alternately arranged, thereby forming the rotor 110 together with the rotor disk 130 .

[0068] Through the above arrangement, the first magnetic steel 124 and the second magnetic steel 125 are respectively engaged with two adjacent separation bars 140, so that the first magnetic steel 124 and the second magnetic steel 125 form a certain misalignment angle along the circumferential direction D2, which can change the magnetic flux phase of the motor, weaken the harmonic amplitude, thereby reducing the vibration during the operation of the motor, and achieving the purpose of improving the running stability of the motor. At the same time, the layered treatment of the magnetic steel 120 is conducive to reducing the eddy current loss of the magnetic steel 120, reducing the temperature rise of the magnetic steel 120, and improving the anti-demagnetization ability of the magnetic steel 120.

[0069] Optionally, the adjacent magnetic steels 120 and the magnetic steels 120 and the disk body 131 can be fixed together by adhesive, which is easy to assemble, and the use of adhesive fixation is sufficient to meet the limit requirements between the magnetic steels 120 and between the magnetic steels 120 and the disk body 131 along the axial direction D1.

[0070] Reference Figure 6 The utility model also provides an axial flux motor, comprising the rotor 110 and the stator 100 according to the above, wherein the rotor 110 is arranged on both sides of the stator 100 along the axial direction D1 of the motor. The axial flux motor according to the utility model has a small axial size and is easy to assemble.

[0071] Furthermore, the axial flux motor includes two rotors 110 and a stator 100 , and the two rotors 110 are arranged on both sides of the stator 100 along the axial direction D1 , so that the axial flux motor has a greater torque and a higher output efficiency.

[0072] The utility model also provides a vehicle, comprising the above-mentioned axial flux motor. According to the vehicle of the utility model, the axial flux motor used has a small axial size and a high space utilization rate.

[0073] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0074] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A rotor, It is characterized in that The rotor comprises: magnetic steel; A rotor disk, wherein the rotor disk is provided with an annular groove, wherein the annular groove is used to accommodate the magnetic steel and limit the magnetic steel along the radial direction of the rotor disk; and A separation bar, wherein the separation bar is disposed in the annular groove, and the separation bar is arranged at intervals along the circumferential direction of the rotor disk, and is used to limit the magnetic steel along the circumferential direction; Wherein, along the circumferential direction, one of the magnetic steel and the partition bar at least partially protrudes toward the other of the magnetic steel and the partition bar.

2. The rotor according to claim 1, It is characterized in that The partition bar is provided with a protruding portion, and the magnetic steel is provided with a recessed portion, and the protruding portion extends to the recessed portion along the circumferential direction so that the magnetic steel is embedded in the partition bar.

3. The rotor according to claim 1, It is characterized in that The magnetic steel is provided with a protruding portion, and the partition bar is provided with a recessed portion, and the protruding portion extends to the recessed portion along the circumferential direction so that the magnetic steel is embedded with the partition bar.

4. The rotor according to claim 2 or 3, It is characterized in that The protrusion includes a first protrusion and a second protrusion, and the first protrusion and the second protrusion are arranged on both sides of the dividing strip along the circumferential direction; the recessed portion includes a first recessed portion and a second recessed portion, and the first recessed portion and the second recessed portion are arranged on both sides of the magnetic steel along the circumferential direction.

5. The rotor according to claim 2 or 3, It is characterized in that The protruding portion includes a first protruding portion and a second protruding portion, and the first protruding portion and the second protruding portion are arranged at intervals along the radial direction; the recessed portion includes a first recessed portion and the second recessed portion, and the first recessed portion and the second recessed portion are arranged at intervals along the radial direction.

6. The rotor according to claim 1, It is characterized in that The rotor includes multiple layers of magnetic steel, and the multiple layers of magnetic steel are arranged along the axial direction of the rotor disk.

7. The rotor according to claim 6, It is characterized in that The multi-layer magnetic steel includes a first magnetic steel and a second magnetic steel, the first magnetic steel is provided with a first recessed portion, the second magnetic steel is provided with a second recessed portion, and the first recessed portion and the second recessed portion are spaced apart along the circumferential direction; the first protrusion and the second protrusion are respectively provided on both sides of the dividing strip, the first protrusion cooperates with the first recessed portion, and the second protrusion cooperates with the second recessed portion.

8. The rotor according to claim 6, It is characterized in that The rotor disk comprises: The disc; and A flange portion is arranged at the edge of the disk body and protrudes from the disk body, and the flange portion extends along the circumferential direction.

9. The rotor according to claim 8, It is characterized in that The rotor disk also includes a boss portion, which is arranged in the middle of the disk body and protrudes from the disk body. The flange portion is spaced apart from the boss portion along the radial direction to form the annular groove on the disk body. Along the axial direction of the rotor disk, the distance that the flange portion protrudes from the disk body is not less than the distance that the boss portion protrudes from the disk body.

10. The rotor according to claim 8, It is characterized in that Along the axial direction, the distance that the magnetic steel protrudes from the flange portion is smaller than the size of a single layer of the magnetic steel.

11. The rotor according to claim 10, It is characterized in that The number of layers of the magnetic steel is n, the distance that the flange protrudes from the disk body is h, the layer height of the multiple layers of the magnetic steel is d, and (n-1)*d / n<h≤d.

12. An axial flux motor, It is characterized in that The motor comprises a rotor and a stator according to any one of claims 1 to 11, wherein the rotor is arranged on both sides of the stator along the axial direction of the motor.

13. A vehicle, It is characterized in that Comprising an axial flux electric machine according to claim 12.

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