Rotor of axial flux motor, and axial flux motor

Abstract

A rotor of an axial flux motor, and an axial flux motor. The rotor of the axial flux motor comprises a rotor carrier (1), a fixing ring (2), and a plurality of magnetic steel units (3); the rotor carrier (1) is circumferentially provided with a plurality of mounting slots (11); each magnetic steel unit (3) is correspondingly mounted in one mounting slot (11); the fixing ring (2) is arranged around the rotor carrier (1) and radially limits the magnetic steel units (3); in the radial direction of the rotor carrier (1), each magnetic steel unit (3) comprises an inner ring magnetic steel assembly (31) and an outer ring magnetic steel assembly (32); a plurality of limiting portions (12) are formed on the rotor carrier (1); and each limiting portion (12) radially limits one inner ring magnetic steel assembly (31).

Description

Rotor of axial magnetic field motor and axial magnetic field motor

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on March 6, 2024, with application numbers 202410254555.2, 202410254552.9, 202410254549.7 and 202410254559.0, the entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of axial magnetic field motors, for example, to a rotor of an axial magnetic field motor and an axial magnetic field motor. Background Art

[0003] Axial magnetic field motors, also known as disc motors, have the advantages of small axial size, high torque density, high power density and high efficiency. They are widely used in electric vehicles, general industry and household appliances.

[0004] As shown in Figure 1, the rotor of an axial magnetic field motor typically includes a rotor support 1', a retaining ring 3', and multiple magnets 2'. The rotor support 1' is formed with multiple mounting slots 11', and the magnets 2' are mounted in corresponding mounting slots 11'. The retaining ring 3' is sleeved around the outer circumference of the rotor support 1', thereby radially confining the magnets 2' between the retaining ring 3' and the rotor support 1'. As the rotor speed increases, the centrifugal force on the magnets 2' also increases accordingly. However, the retaining ring 3' has limited radial restraint on the magnets 2'. As a result, the above rotor structure cannot meet the development trend of higher motor speeds.

[0005] Summary of the Invention

[0006] The present application proposes a rotor for an axial magnetic field motor, which can provide radial constraints on the magnetic steel unit partitions, so that the magnetic steel units can overcome large centrifugal forces, thereby enabling the rotor to adapt to high-speed applications of the axial magnetic field motor.

[0007] A rotor for an axial magnetic field motor comprises a rotor support, a fixing ring, and a plurality of magnetic steel units. The rotor support is provided with a plurality of mounting slots along a circumferential direction, and each magnetic steel unit is mounted in a corresponding mounting slot. The fixing ring is disposed around the rotor support and radially limits the magnetic steel units.

[0008] Along the radial direction of the rotor bracket, the magnetic steel unit includes an inner ring magnetic steel assembly and an outer ring magnetic steel assembly. A plurality of limiting portions are formed on the rotor bracket, and each limiting portion limits one of the inner ring magnetic steel assemblies along the radial direction.

[0009] As an optional solution, the mounting groove includes a first groove body and a second groove body arranged radially from the inside to the outside, the rotor bracket forms the limiting portion between the first groove body and the second groove body, and at least part of the outer circumferential surface of the inner ring magnetic steel assembly abuts against the limiting portion.

[0010] As an optional solution, the rotor support includes two support monomers arranged along the axial direction, and the two support monomers are symmetrically arranged.

[0011] As an optional solution, the two bracket monomers are bonded and connected.

[0012] As an optional solution, the first groove body and the second groove body are connected, and the size of the outer circumference of the first groove body is larger than the size of the inner circumference of the second groove body to form the limiting portion.

[0013] As an optional solution, the first slot body and the second slot body are not connected, and each of the limiting portions has the same circumferential extension trajectory as the corresponding inner ring magnetic steel assembly.

[0014] As an optional solution, reinforcing ribs are formed on the rotor bracket, and the reinforcing ribs are arranged around the outer circumference of the plurality of outer ring magnetic steel assemblies.

[0015] As an optional solution, set to at least one of the following situations:

[0016] One of the sidewall of the first slot body parallel to the radial direction and the sidewall of the inner ring magnetic steel assembly is provided with a first protrusion, and the other is provided with a first groove, and the first protrusion is engaged with the first groove; or

[0017] One of the sidewalls of the second slot body parallel to the radial direction and the sidewall of the outer ring magnetic steel assembly is provided with a second protrusion, and the other is provided with a second groove, and the second protrusion is snap-fitted with the second groove.

[0018] As an optional solution, set to at least one of the following situations:

[0019] The inner ring magnetic steel assembly is divided into two inner sub-segments along the axial direction; or

[0020] The outer ring magnetic steel assembly is divided into two outer sub-segments along the axial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a rotor of an axial magnetic field motor provided by related art;

[0022] FIG2 is a schematic structural diagram of a rotor of an axial magnetic field motor provided in Example 1 of the present application;

[0023] FIG3 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in Example 1 of the present application;

[0024] FIG4 is a schematic structural diagram of a rotor of an axial magnetic field motor provided in a second embodiment of the present application;

[0025] FIG5 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in Example 2 of the present application;

[0026] FIG6 is a schematic structural diagram of a rotor of an axial magnetic field motor provided in Example 3 of the present application;

[0027] FIG7 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in Example 3 of the present application;

[0028] FIG8 is a schematic structural diagram of a rotor of an axial magnetic field motor provided in a fourth embodiment of the present application;

[0029] FIG9 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in a fourth embodiment of the present application;

[0030] FIG10 is a schematic diagram of the exploded structure of the rotor of the axial magnetic field motor provided in the fourth embodiment of the present application;

[0031] FIG11 is a schematic diagram of the rotor assembly process of the axial magnetic field motor provided in the fourth embodiment of the present application;

[0032] FIG12 is a schematic structural diagram of the rotor of the axial magnetic field motor provided in Example 5 of the present application;

[0033] FIG13 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in Example 5 of the present application;

[0034] FIG14 is a schematic structural diagram of the rotor of the axial magnetic field motor provided in Example 6 of the present application;

[0035] FIG15 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in Example 6 of the present application;

[0036] FIG16 is a schematic structural diagram of the rotor of the axial magnetic field motor provided in Example 7 of the present application;

[0037] FIG17 is an exploded view of the rotor of the axial magnetic field motor provided in Example 7 of the present application;

[0038] FIG18 is a schematic structural diagram of the inner ring guide disk and the rotor bracket provided in Example 7 of the present application;

[0039] FIG19 is a top view of the structure in FIG18;

[0040] FIG20 is a cross-sectional view AA in FIG19;

[0041] FIG21 is a schematic structural diagram of the rotor of the axial magnetic field motor provided in Example 8 of the present application;

[0042] FIG22 is an exploded view of the rotor of the axial magnetic field motor provided in Example 8 of the present application;

[0043] FIG23 is a schematic structural diagram of the outer ring guide disk and the rotor bracket provided in Example 8 of the present application;

[0044] FIG24 is a schematic structural diagram of the outer ring guide disk, rotor bracket and fixing ring provided in Example 8 of the present application;

[0045] FIG25 is a schematic structural diagram of the rotor of the axial magnetic field motor provided in Example 9 of the present application;

[0046] FIG26 is an exploded view of the rotor of the axial magnetic field motor provided in Example 9 of the present application;

[0047] FIG27 is a schematic diagram of the structure of the inner ring guide disk, the outer ring guide disk and the rotor bracket provided in Example 9 of the present application;

[0048] FIG28 is a top view of the structure in FIG27;

[0049] FIG29 is a sectional view BB in FIG28;

[0050] FIG30 is a schematic structural diagram of an arrangement of magnetic steel units provided in Example 10 of the present application;

[0051] FIG31 is a schematic diagram of a rotor assembly provided in Example 10 of the present application;

[0052] FIG32 is a schematic structural diagram of the rotor of the axial magnetic field motor provided in the tenth embodiment of the present application;

[0053] FIG33A is a structural diagram of the rotor assembly process of the first axial magnetic field motor provided in the eleventh embodiment of the present application;

[0054] FIG33B is a structural diagram of the rotor assembly process of the second axial magnetic field motor provided in the eleventh embodiment of the present application;

[0055] FIG34 is a schematic structural diagram of a rotor of an axial magnetic field motor provided in a twelfth embodiment of the present application;

[0056] FIG35 is an exploded view of the rotor of the axial magnetic field motor provided in the twelfth embodiment of the present application;

[0057] FIG36 is a schematic structural diagram of a rotor support provided in Example 12 of the present application;

[0058] FIG37 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in a twelfth embodiment of the present application;

[0059] FIG38 is a side view of the rotor of the axial magnetic field motor provided in the twelfth embodiment of the present application;

[0060] FIG39 is a cross-sectional view of FIG38 AA;

[0061] Figure 40 is an enlarged view of point B in Figure 35;

[0062] FIG41 is a schematic diagram of a partial structure of a rotor of another axial magnetic field motor provided in Example 12 of the present application;

[0063] FIG42 is a schematic structural diagram of a rotor of an axial magnetic field motor provided in Example 13 of the present application;

[0064] FIG43 is an exploded view of the rotor of the axial magnetic field motor provided in Example 13 of the present application;

[0065] FIG44 is a schematic structural diagram of a rotor support provided in Example 13 of the present application;

[0066] FIG45 is a schematic diagram of a partial structure of a rotor of an axial magnetic field motor provided in Example 13 of the present application;

[0067] FIG46 is a side view of the rotor of the axial magnetic field motor provided in the thirteenth embodiment of the present application;

[0068] FIG47 is a CC sectional view in FIG45;

[0069] FIG48 is a schematic structural diagram of a stent unit provided in Example 13 of the present application;

[0070] FIG49 is a schematic structural diagram of a magnetic steel unit provided in Example 13 of the present application;

[0071] FIG50 is a flow chart of a method for manufacturing a rotor of an axial magnetic field motor provided in Example 7 of the present application;

[0072] FIG51 is a flow chart of a method for manufacturing a rotor of an axial magnetic field motor provided in Example 8 of the present application;

[0073] Figure 52 is a flow chart of a method for manufacturing a rotor of an axial magnetic field motor provided in Example 10 of the present application.

[0074] In the picture:

[0075] 1′, rotor bracket; 11′, mounting slot; 2′, magnet; 3′, fixing ring;

[0076] 1. Rotor bracket; 11. Mounting slot; 111. First slot body; 112. Second slot body; 12. Position limiting portion; 13. Bracket unit; 131. First accommodating slot; 132. Second accommodating slot; 14. Reinforcement rib; 15. First protrusion; 16. Second protrusion; 17. Third protrusion; 18. Fourth protrusion; 19. Avoidance hole;

[0077] 2. Fixed ring;

[0078] 3. Magnetic steel unit; 31. Inner ring magnetic steel assembly; 311. Inner sub-segment; 312. First groove; 32. Outer ring magnetic steel assembly; 321. Outer sub-segment; 322. Second groove; 331. Third groove; 332. Fourth groove;

[0079] 41. Inner ring guide disk; 411. Inner ring filling part; 412. Inner ring connecting part; 42. Outer ring guide disk; 421. Outer ring filling part; 422. Outer ring connecting part.

[0080] 5. Constraint mechanism; 51. Connecting assembly; 511. Column; 512. First pressure plate; 513. Second pressure plate; 5131. Mounting hole; 52. Inner ring sleeve; 53. Outer ring sleeve. DETAILED DESCRIPTION

[0081] The present application will be described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present application and are not intended to limit the present application. For ease of description, the accompanying drawings only illustrate portions of the present application, not all of the structures.

[0082] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0083] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0084] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0085] Example 1

[0086] This embodiment provides a rotor for an axial magnetic field motor and an axial magnetic field motor. The axial magnetic field motor includes at least one stator and a rotor for the axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two stators and a rotor for the axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two rotors for the axial magnetic field motor and a stator. The rotor of the axial magnetic field motor in this embodiment can provide radial constraints on the magnetic steel unit partitions, allowing the magnetic steel units to overcome large centrifugal forces, thereby enabling the rotor to adapt to high-speed applications of the axial magnetic field motor.

[0087] As shown in Figures 2 and 3, the rotor of the axial magnetic field motor includes a rotor support 1, multiple magnetic steel units 3 and a fixed ring 2. The rotor support 1 has a circular outline and is provided with multiple mounting grooves 11 along its circumference. Optionally, the multiple mounting grooves 11 are evenly distributed along the circumference of the rotor support 1. Each magnetic steel unit 3 is correspondingly installed in a mounting groove 11. Along the radial direction of the rotor support 1, each magnetic steel unit 3 includes an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32. A plurality of limiting portions 12 are formed on the rotor support 1, each limiting portion 12 radially limiting an inner ring magnetic steel assembly 31. The fixed ring 2 is arranged around the rotor support 1 and radially limits the outer ring magnetic steel assembly 32.

[0088] In the rotor of the axial magnetic field motor of the present application, the limiting portion 12 on the rotor bracket 1 can radially constrain the inner ring magnetic steel assembly 31 to overcome the centrifugal force during rotation, and the fixing ring 2 can provide radial constraint to the outer ring magnetic steel assembly 32 to overcome the centrifugal force. The rotor of this embodiment provides radial constraint to the magnetic steel unit 3 by partitioning, that is, the rotor bracket 1 shares part of the centrifugal force of the magnetic steel unit 3. Therefore, under the premise of a certain constraint force of the fixing ring 2, it can achieve constraint on the outer ring magnetic steel assembly 32 rotating at a higher speed, and the entire rotor can meet the requirements of effectively constraining the magnetic steel unit 3 rotating at a higher speed, so as to adapt to the high-speed application of the axial magnetic field motor. The axial magnetic field motor in this embodiment, by providing the above-mentioned rotor, has a strong structure and can adapt to high-speed applications.

[0089] As shown in Figures 2 and 3, the mounting slot 11 includes a first slot body 111 and a second slot body 112 arranged radially from the inside to the outside. The rotor support 1 forms a limiting portion 12 between the first slot body 111 and the second slot body 112, and at least a portion of the outer circumferential surface of the inner ring magnetic steel assembly 31 abuts the limiting portion 12. By configuring the mounting slot 11 to be composed of two slot bodies, it is not only convenient to separately support and limit the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32, but also convenient to form the limiting portion 12 on the rotor support 1. In this embodiment, the first slot body 111 and the second slot body 112 are both configured as fan ring structures.

[0090] As shown in FIG2 , in this embodiment, the first slot body 111 and the second slot body 112 are connected. The outer circumferential size of the first slot body 111 is larger than the inner circumferential size of the second slot body 112, thereby forming a stepped stopper 12. The outer circumferential surface of the inner ring magnetic steel assembly 31 abuts against the stepped stopper 12, thereby causing the stopper 12 to radially constrain the inner ring magnetic steel assembly 31. Optionally, along the circumferential direction, both ends of the outer ring of the first slot body 111 form the aforementioned steps, which respectively abut against the ends of the circumferential surface of the inner ring magnetic steel assembly 31, thereby making the force applied to the inner ring magnetic steel assembly 31 more uniform, thereby ensuring that the inner ring magnetic steel assembly 31 is effectively constrained when the rotor rotates at high speed.

[0091] Optionally, as shown in Figure 3, one of the radially parallel sidewalls of the first trough 111 and the sidewall of the inner ring magnetic steel assembly 31 is provided with a first protrusion 15, and the other is provided with a first groove 312, with the first protrusion 15 snapping into engagement with the first groove 312. The engagement of the first protrusion 15 and the first groove 312 allows the rotor support 1 to axially limit the inner ring magnetic steel assembly 31, thereby strengthening the structure of the entire rotor and preventing the rotor from falling apart during high-speed rotation. In this embodiment, first protrusions 15 are provided on both sidewalls of the first trough 111, and first grooves 312 are provided on both sidewalls of the inner ring magnetic steel assembly 31, with each first protrusion 15 snapping into engagement with a first groove 312.

[0092] Similarly, as shown in Figure 3, one of the radially parallel sidewalls of the second trough 112 and the sidewall of the outer ring magnetic steel assembly 32 is provided with a second protrusion 16, and the other is provided with a second groove 322. The second protrusion 16 engages with the second groove 322. The engagement of the second protrusion 16 and the second groove 322 allows the rotor support 1 to axially limit the outer ring magnetic steel assembly 32, thereby further enhancing the structural strength of the entire rotor and preventing the rotor from falling apart during high-speed rotation. In this embodiment, the second protrusion 16 is provided on both sidewalls of the second trough 112, and the second groove 322 is provided on both sidewalls of the outer ring magnetic steel assembly 32. Each second protrusion 16 engages with a second groove 322.

[0093] Optionally, as shown in Figure 3, the inner ring magnetic steel assembly 31 is axially divided into two inner sub-segments 311. The two inner sub-segments 311 are magnetically connected to each other and form a first groove 312. During rotor assembly, the two inner sub-segments 311 can be inserted into the first slot 111 from either end of the rotor support 1 along the axial direction. Once the two inner sub-segments 311 are magnetically fixed to each other, the first groove 312 engages with the corresponding first protrusion 15. Furthermore, configuring the inner ring magnetic steel assembly 31 as consisting of two axially arranged inner sub-segments 311 can also axially split the rotor's induced eddy current loop, thereby reducing rotor eddy current losses. In some embodiments, glue can be applied to the circumferential surface of the inner ring magnetic steel assembly 31 to bond the inner ring magnetic steel assembly 31 to the slot wall of the first slot 111, further improving the reliability of the connection between the inner ring magnetic steel assembly 31 and the rotor support 1.

[0094] In some embodiments, the inner ring magnetic steel assembly 31 is not segmented along the axial direction. In this case, to ensure that the inner ring magnetic steel assembly 31 is smoothly installed in the first slot 111, the inner ring magnetic steel assembly 31 can be used as an insert and integrally molded with the rotor bracket 1.

[0095] As shown in Figure 2, in this embodiment, the second slot 112 extends radially through the outer circumference of the rotor support 1, and the outer ring magnetic steel assembly 32 is not segmented axially. The outer ring magnetic steel assembly 32 can be radially installed into the second slot 112, thereby improving the convenience of installing the outer ring magnetic steel assembly 32. After all outer ring magnetic steel assemblies 32 are installed in the second slot 112, the retaining ring 2 is installed / molded.

[0096] In some embodiments (not shown), the outer ring magnetic steel assembly 32 is also divided into two outer sub-segments along the axial direction. This arrangement can axially split the rotor's induced eddy current loop, thereby further reducing the rotor's eddy current losses.

[0097] Example 2

[0098] This embodiment provides a rotor of an axial magnetic field motor and an axial magnetic field motor. The inventive concept of the rotor of the axial magnetic field motor is the same as that of the first embodiment, that is, a plurality of limiting portions 12 are provided on the rotor support 1 for radially constraining the inner ring magnetic steel assembly 31. The difference between this embodiment and the first embodiment lies in the specific arrangement of the limiting portions 12, which is as follows:

[0099] As shown in Figures 4 and 5, in this embodiment, the first slot body 111 and the second slot body 112 are not connected. The solid structure between the first slot body 111 and the second slot body 112 constitutes a stopper 12. Each stopper 12 aligns with the circumferential extension trajectory of the corresponding inner ring magnetic steel assembly 31. That is, the outer circumferential surface of the inner ring magnetic steel assembly 31 is completely aligned with a corresponding stopper 12. This provides a more stable and uniform radial constraint on the inner ring magnetic steel assembly 31 to overcome the centrifugal force during rotation, making the rotor structure more stable and reliable during high-speed rotation. As shown in Figure 5, multiple stoppers 12 together form a ring structure. This structure improves the structural strength of the rotor support 1 itself, thereby preventing the rotor from falling apart during high-speed rotation.

[0100] In this embodiment, the structure of the inner ring magnetic steel assembly 31, the structure of the outer ring magnetic steel assembly 32, the matching method between the inner ring magnetic steel assembly 31 and the rotor bracket 1, and the matching method between the outer ring magnetic steel assembly 32 and the rotor bracket 1 are all the same as those in Example 1, so they will not be repeated here.

[0101] Example 3

[0102] This embodiment provides a rotor and an axial magnetic field motor for an axial magnetic field motor, which share the same inventive concept as the second embodiment. As shown in Figures 6 and 7 , in this embodiment, the first slot 111 and the second slot 112 are not connected, and each limiting portion 12 and the corresponding inner ring magnetic steel assembly 31 have the same circumferential extension trajectory. This embodiment differs from the second embodiment in the way the rotor bracket 1 constrains the outer ring magnetic steel assembly 32, as follows:

[0103] As shown in Figure 6, the rotor bracket 1 is further formed with reinforcing ribs 14, which are arranged around the outer circumference of the multiple outer ring magnetic steel assemblies 32. In this embodiment, the reinforcing ribs 14 and the retaining ring 2 together radially constrain the outer ring magnetic steel assemblies 32 to overcome the centrifugal force of the outer ring magnetic steel assemblies 32 when the rotor rotates at high speeds, ensuring the structural stability of the rotor during high-speed rotation and meeting the requirements of high-speed motor applications.

[0104] In this embodiment, the structure of the inner ring magnetic steel assembly 31, the matching method of the inner ring magnetic steel assembly 31 and the rotor bracket 1, and the setting method of the second protrusion 16 in the second groove body 112 are the same as those in Example 1 and will not be repeated here.

[0105] As shown in Figure 7, in this embodiment, the outer ring magnetic steel assembly 32 is axially divided into two outer sub-segments 321. The two outer sub-segments 321 are magnetically connected to each other and form a second groove 322. During rotor assembly, the two outer sub-segments 321 can be inserted into the second slot 112 from either end of the rotor support 1 along the axial direction. Once the two outer sub-segments 321 are magnetically fixed to each other, the second groove 322 engages with the corresponding second protrusion 16. Furthermore, configuring the outer ring magnetic steel assembly 32 as consisting of two axially arranged outer sub-segments 321 can also axially split the rotor's induced eddy current loop, thereby reducing rotor eddy current losses. In some embodiments, glue can be applied to the circumference of the outer ring magnetic steel assembly 32 to bond the inner ring magnetic steel assembly 31 to the slot wall of the second slot 112, further improving the reliability of the connection between the outer ring magnetic steel assembly 32 and the rotor support 1.

[0106] It is understandable that in some embodiments, the outer ring magnetic steel assembly 32 is not segmented along the axial direction. In this case, to ensure that the outer ring magnetic steel assembly 32 is matched with the second slot body 112, the outer ring magnetic steel assembly 32 can be used as an insert and molded integrally with the rotor bracket 1.

[0107] Example 4

[0108] This embodiment provides a rotor of an axial magnetic field motor and an axial magnetic field motor. The inventive concept of the rotor of the axial magnetic field motor of this embodiment is the same as that of the first embodiment, that is, a plurality of limiting portions 12 are formed on the rotor bracket 1 to radially constrain a plurality of inner ring magnetic steel assemblies 31 respectively. The difference between this embodiment and the first embodiment lies in the manner in which the rotor bracket 1 cooperates with the inner ring magnetic steel assemblies 31 and the outer ring magnetic steel assemblies 32, respectively, as follows:

[0109] As shown in Figures 8-10, the rotor support 1 includes two axially arranged support units 13. The two support units 13 are symmetrically arranged, and the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are not segmented along the axial direction. In this embodiment, by configuring the rotor support 1 to be composed of two support units 13, the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are not segmented, which facilitates installation.

[0110] Optionally, in this embodiment, as shown in FIG10 , the first groove 312 is provided on the inner wall of the first slot body 111, and the first protrusion 15 is provided on the inner wall of the inner ring magnetic steel assembly 31. The second groove 322 is provided on the side wall of the outer ring magnetic steel assembly 32, and the second protrusion 16 is provided on the side wall of the second slot body 112. Therefore, when assembling the rotor, as shown in FIG11 , the multiple inner ring magnetic steel assemblies 31 are respectively placed on the first slot body 111 of the first bracket unit 13; the second bracket unit 13 is then snapped onto the first bracket unit 13; the multiple outer ring magnetic steel assemblies 32 are then radially inserted into the corresponding second slot bodies 112; and the fixing ring 2 is sleeved or formed around the outer circumference of the rotor bracket 1. At this time, as shown in Figure 10, the second groove 322 on each outer ring magnetic steel assembly 32 can achieve axial clamping limitation of the two bracket monomers 13 by cooperating with the corresponding second protrusion 16. At the same time, the first groove 312 on the two bracket monomers 13 achieves axial limitation of the inner ring magnetic steel assembly 31 by cooperating with the first protrusion 15 on the inner ring magnetic steel assembly 31, that is, the rotor bracket 1, the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are axially limited to each other, thereby improving the overall structural strength of the rotor.

[0111] In this embodiment, the end surface of the second protrusion 16 close to the first slot body 111 constitutes the limiting portion 12 and limits the inner ring magnetic steel assembly 31 in the radial direction.

[0112] It is understandable that, in some embodiments, glue may be applied between the two bracket monomers 13 to bond the two bracket monomers 13 together, thereby further improving the structural firmness of the entire rotor.

[0113] Example 5

[0114] This embodiment provides a rotor for an axial magnetic field motor and an axial magnetic field motor. The inventive concept of the rotor of the axial magnetic field motor is the same as that of the fourth embodiment. As shown in Figures 12 and 13, in this embodiment, the rotor bracket 1 is also configured to be composed of two bracket units 13, so that the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are not segmented along the axial direction, and can also be easily assembled. The difference between this embodiment and the fourth embodiment lies in the configuration of the limit portion 12, which is specifically as follows:

[0115] As shown in Figure 13 , in this embodiment, the first slot 111 and the second slot 112 are disconnected. The physical structure between the first slot 111 and the second slot 112 constitutes a stopper 12. Each stopper 12 aligns with the circumferential extension trajectory of the corresponding inner ring magnetic steel assembly 31. In other words, the outer circumferential surface of the inner ring magnetic steel assembly 31 is completely aligned with a corresponding stopper 12. This provides a more stable and uniform radial constraint on the inner ring magnetic steel assembly 31 to overcome centrifugal force, making the rotor structure more stable and reliable during high-speed rotation. As shown in Figure 13 , multiple stoppers 12 together form a ring-shaped structure. This structure enhances the structural strength of the rotor support 1, thereby preventing the rotor from falling apart during high-speed rotation.

[0116] In this embodiment, the matching manner of the first protrusion 15 and the first groove 312, the matching manner of the second protrusion 16 and the second groove 322, and the assembly method of the rotor are the same as those in the fourth embodiment and are not repeated here.

[0117] Example 6

[0118] This embodiment provides a rotor for an axial magnetic field motor and an axial magnetic field motor. The inventive concept of the rotor for the axial magnetic field motor in this embodiment is the same as that of the fifth embodiment. As shown in Figures 14 and 15, the rotor bracket 1 in this embodiment is also configured to be composed of two bracket units 13. The inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are not segmented along the axial direction, and the limiting portion 12 and the corresponding inner ring magnetic steel assembly 31 have the same circumferential extension trajectory. The difference between this embodiment and the fifth embodiment lies in the way the rotor bracket 1 constrains the outer ring magnetic steel assembly 32, which is specifically as follows:

[0119] As shown in Figures 14 and 15 , the rotor support 1 is further formed with reinforcing ribs 14, which are arranged around the outer circumference of the plurality of outer ring magnetic steel assemblies 32. In this embodiment, the reinforcing ribs 14 and the retaining ring 2 together radially constrain the outer ring magnetic steel assemblies 32 to overcome the centrifugal force of the outer ring magnetic steel assemblies 32 when the rotor rotates at high speeds, ensuring the structural stability of the rotor during high-speed rotation and meeting the requirements of high-speed motor applications.

[0120] In this embodiment, the structure of the inner ring magnetic steel assembly 31, the matching method of the inner ring magnetic steel assembly 31 and the rotor bracket 1, and the setting method of the second protrusion 16 in the second groove body 112 are the same as those in Example 5 and will not be repeated here.

[0121] As shown in Figure 15, in this embodiment, the outer ring magnetic steel assembly 32 is axially divided into two outer sub-segments 321. The two outer sub-segments 321 are magnetically connected to each other and form a second groove 322. During rotor assembly, the two outer sub-segments 321 can be inserted into the second slot 112 from either end of the rotor support 1 along the axial direction. Once the two outer sub-segments 321 are magnetically fixed to each other, the second groove 322 engages with the corresponding second protrusion 16. Furthermore, configuring the outer ring magnetic steel assembly 32 as consisting of two axially arranged outer sub-segments 321 can also axially split the rotor's induced eddy current loop, thereby reducing rotor eddy current losses. In some embodiments, glue can be applied to the circumference of the outer ring magnetic steel assembly 32 to bond the inner ring magnetic steel assembly 31 to the slot wall of the second slot 112, further improving the reliability of the connection between the outer ring magnetic steel assembly 32 and the rotor support 1.

[0122] In this embodiment, the general process of rotor assembly is as follows: multiple inner ring magnetic steel assemblies 31 are respectively placed on the first slot body 111 of the first bracket monomer 13; then the second bracket monomer 13 is buckled on the first bracket monomer 13; then, the two outer sub-segments 321 of the same outer ring magnetic steel assembly 32 are respectively installed into the second slot body 112 from the two ends of the second slot body 112 along the axial direction. After the multiple outer ring magnetic steel assemblies 32 are installed on the rotor bracket 1 in this way, a fixing ring 2 is sleeved or formed on the outer periphery of the rotor bracket 1. At this time, the second groove 322 on each outer ring magnetic steel assembly 32 can achieve axial clamping and limiting of the two bracket monomers 13 by cooperating with the corresponding second protrusion 16. At the same time, the first groove 312 on the two bracket monomers 13 achieves axial limiting of the inner ring magnetic steel assembly 31 by cooperating with the first protrusion 15 on the inner ring magnetic steel assembly 31, that is, the rotor bracket 1, the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are axially limited to each other, thereby improving the overall structural strength of the rotor.

[0123] It is understandable that in some embodiments, the outer ring magnetic steel assembly 32 is not segmented along the axial direction. In this case, to ensure that the outer ring magnetic steel assembly 32 is matched with the second slot body 112, the outer ring magnetic steel assembly 32 can be used as an insert and molded integrally with the rotor bracket 1.

[0124] The rotor of the axial magnetic field motor of the present application has the following advantages:

[0125] (1) The limiting portion on the rotor bracket can radially constrain the inner ring magnetic steel assembly to overcome the centrifugal force during rotation, and the fixed ring can provide radial constraints to the outer ring magnetic steel assembly to overcome the centrifugal force during rotation. The rotor divides the magnetic steel unit into sections to provide radial constraints, that is, the rotor bracket shares part of the centrifugal force of the magnetic steel unit. Therefore, under the premise of a certain constraint force of the fixed ring, the outer ring magnetic steel assembly rotating at a higher speed can be constrained, and the entire rotor can meet the requirements of effectively constraining the magnetic steel unit rotating at a higher speed, so as to adapt to the high-speed application of the axial magnetic field motor.

[0126] (2) The reinforcing ribs can provide radial constraints on the outer ring magnetic steel assembly together with the fixing ring, and the reinforcing ribs also make the structure of the rotor bracket more solid, further ensuring the structural stability of the rotor when rotating at high speed and avoiding the situation of falling apart.

[0127] (3) The inner ring magnetic steel assembly is set as an axially segmented structure, which not only facilitates the assembly of the inner ring magnetic steel assembly and the rotor bracket, but also can split the induced eddy current loop of the rotor in the axial direction, thereby reducing the rotor eddy current loss.

[0128] (4) By configuring the rotor bracket to include two bracket monomers along the axial direction, the inner ring magnetic steel assembly and the outer ring magnetic steel assembly are not segmented along the axial direction, which facilitates assembly with the rotor bracket.

[0129] Example 7

[0130] This embodiment provides a rotor of an axial magnetic field motor and an axial magnetic field motor. The axial magnetic field motor includes at least one stator and a rotor of the above-mentioned axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two stators and a rotor of the above-mentioned axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two rotors of the above-mentioned axial magnetic field motor and a stator. The rotor of the axial magnetic field motor in this embodiment can reduce the amount of magnetic steel used and reduce production costs while ensuring better magnetic flux. By providing the above-mentioned rotor, the axial magnetic field motor reduces production costs while ensuring better torque and power.

[0131] As shown in Figures 16-18, the rotor of the axial magnetic field motor includes a rotor support 1, a conductive magnetic disk assembly, and multiple magnetic steel units 3. The rotor support 1 has a circular outline and is provided with multiple mounting slots 11 along its circumference. Optionally, the multiple mounting slots 11 are evenly distributed around the circumference of the rotor support 1. The conductive magnetic disk assembly also has a circular outline and is coaxially arranged and connected to the rotor support 1. The conductive magnetic disk assembly is made of a magnetically conductive material and includes multiple filling portions, the number of which is the same as the number of mounting slots 11. Each filling portion can partially fill the space in the corresponding mounting slot 11. Each magnetic steel unit 3 is correspondingly provided in a mounting slot 11 and fills the remaining space in the mounting slot 11. Each mounting slot 11 is filled with one magnetic steel unit 3 and one filling portion. The north-south (NS) poles of two adjacent magnetic steel units 3 along the circumference are opposite. The number of magnetic steel units 3 is an even number, and each two adjacent magnetic steel units 3 form a pole pair.

[0132] In the rotor of the axial magnetic field motor of this embodiment, the filling portion of the conductive disk assembly fills part of the mounting slot 11, and the magnetic steel unit 3 only needs to fill the remaining space of the mounting slot 11, thereby reducing the amount of magnetic steel used in the entire rotor and further reducing the manufacturing cost of the rotor. Since the conductive disk assembly is made of magnetic conductive material, the magnetic resistance is small, so that a "pseudo-magnet" is formed at each mounting slot 11, thereby minimizing the weakening of the magnetic flux. Even if the rotor still has a high magnetic flux, it is ultimately ensured that the motor still has high torque and power.

[0133] Optionally, the volume of each magnetic steel unit 3 accounts for 50% of the volume of the corresponding mounting slot 11. It is understandable that as the amount of magnetic steel used decreases, the magnetic flux at each magnetic steel unit 3, the torque and power of the motor manufactured by the rotor will all decrease. Through experimental verification, when the amount of magnetic steel used is halved, the magnetic flux at each magnetic steel unit 3 can be maintained at 80%-85% of the full magnetic steel solution (the solution in which the mounting slot 11 is filled with magnetic steel units 3), and the torque and power of the motor manufactured by the rotor can reach 80%-90% of the full magnetic steel solution. In other words, by controlling the volume ratio of the filling part relative to the mounting slot 11, that is, the volume ratio of the magnetic steel unit 3 relative to the mounting slot 11, it is possible to meet the requirements of reducing the manufacturing cost of the rotor and motor of the axial magnetic field motor while maintaining better performance of the motor.

[0134] Optionally, the conductive disk assembly is made of a soft magnetic material such as silicon steel or other materials with high magnetic permeability. Alternatively, the rotor support 1 can be made of a non-magnetic material. In this embodiment, as shown in Figure 17 , each mounting slot 11 radially extends through the circumferential surface of the rotor support 1. Therefore, at least some of the magnetic steel units 3 can be installed radially from the mounting slot 11, thereby improving the installation convenience of the magnetic steel units 3.

[0135] As motors continue to develop towards higher speeds, the magnetic steel unit 3 generates a large centrifugal force during high-speed rotation of the rotor, making it difficult for the fixing ring 2 to reliably restrain the magnetic steel, thereby restricting the application of high-speed motors.

[0136] Optionally, as shown in Figures 16-18, along the radial direction of the rotor support 1, the mounting slot 11 includes a first slot body 111 and a second slot body 112, and the magnetic steel unit 3 includes an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32, wherein the inner ring magnetic steel assembly 31 is accommodated in the first slot body 111, and the outer ring magnetic steel assembly 32 is accommodated in the second slot body 112. The rotor support 1 is formed with limiting portions 12, each limiting portion 12 radially limiting an inner ring magnetic steel assembly 31. In the rotor of this embodiment, the limiting portion 12 on the rotor bracket 1 can radially constrain the inner ring magnetic steel assembly 31 to overcome the centrifugal force during rotation, and the fixing ring 2 can provide radial constraint to the outer ring magnetic steel assembly 32 to overcome the centrifugal force during rotation, that is, the magnetic steel unit 3 is partitioned to provide radial constraint, and the rotor bracket 1 shares part of the centrifugal force during rotation of the magnetic steel unit 3. Therefore, under the premise of a certain constraint force of the fixing ring 2, the outer ring magnetic steel assembly 32 rotating at a higher speed can be constrained, and the entire rotor can meet the requirements of effectively constraining the magnetic steel unit 3 rotating at a higher speed, so as to adapt to the high-speed application of the axial magnetic field motor.

[0137] In this embodiment, as shown in Figures 16 and 17, the first slot body 111 and the second slot body 112 are connected, and the outer circumference of the first slot body 111 is larger than the inner circumference of the second slot body 112, thereby forming a limit portion 12. In other embodiments, the first slot body 111 and the second slot body 112 can also be arranged to be disconnected, and the physical structure between the first slot body 111 and the second slot body 112 constitutes the limit portion 12. In this embodiment, the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are both constructed as fan ring structures.

[0138] Optionally, as shown in Figure 17, the second slot 112 is parallel to the radial sidewalls and the sidewalls of the outer ring magnetic steel assembly 32. One of the second slots 112 is provided with a third protrusion 17, and the other is provided with a third groove 331. The third protrusion 17 engages with the third groove 331. The cooperation between the third protrusion 17 and the third groove 331 enables the rotor bracket 1 to axially limit the outer ring magnetic steel assembly 32, thereby strengthening the structure of the entire rotor. In this embodiment, the third protrusion 17 is provided on the radial sidewalls of the second slot 112, and the third groove 331 is provided on the sidewalls of the outer ring magnetic steel assembly 32. When installing the outer ring magnetic steel assembly 32, the outer ring magnetic steel assembly 32 can be inserted radially into the second slot 112.

[0139] As shown in Figures 17 and 18, in this embodiment, the guide disk assembly includes an inner ring guide disk 41, which includes multiple inner ring filling portions 411. These inner ring filling portions 411 are spaced apart along the circumference of the rotor support 1. Each inner ring filling portion 411 fills a portion of the space in the first slot 111. The inner ring magnetic steel assembly 31 fills the remaining space in the first slot 111, and the outer ring magnetic steel assembly 32 is installed in the second slot 112. In this embodiment, the inner ring filling portions 411 are the filling portions of the guide disk assembly. Their arrangement forms "dummy magnetic steel," thereby reducing the amount of magnetic steel used in the magnetic steel unit 3 and lowering the manufacturing cost of the rotor. Optionally, the inner ring magnetic steel assembly 31 can be secured to the first slot 111 by bonding, magnetic attraction to the corresponding inner ring filling portion 411, or other methods, which are not specifically limited here.

[0140] Optionally, as shown in Figures 17, 19, and 20, the inner ring guide disk 41 also includes multiple inner ring connecting portions 412, which connect two adjacent inner ring filling portions 411. The provision of these inner ring connecting portions 412 forms the inner ring guide disk 41 as a single unit, not only strengthening the structure but also facilitating connection to the rotor support 1. Each inner ring connecting portion 412 extends circumferentially along the rotor support 1 and is embedded within the rotor support 1. Alternatively, during rotor manufacturing, the inner ring guide disk 41 can be fabricated first and then integrally molded as an insert with the rotor support 1.

[0141] For the rotor of the full-magnet solution (the solution in which the mounting slot 11 is filled with magnetic steel units 3), the distance between two circumferentially adjacent magnets is relatively close, and the clamp of the magnetizing equipment cannot clamp the two adjacent magnets at the same time, resulting in the inability to magnetize the multiple magnets of the rotor as a whole.

[0142] In this regard, in the present application, as shown in Figures 17 and 18, two adjacent inner ring filling portions 411 protrude from either side of the inner ring connecting portion 412, so that the two adjacent inner ring magnetic steel assemblies 31 are located at the axial ends of the rotor bracket 1. By positioning the inner ring filling portions 411, the two circumferentially adjacent inner ring magnetic steel assemblies 31 are located on either side of the rotor bracket 1. Therefore, on the same side of the rotor bracket 1, the inner ring magnetic steel assemblies 31 that need to be magnetized are spaced apart, leaving sufficient space for the magnetization equipment fixture. This allows multiple inner ring magnetic steel assemblies 31 to be magnetized as a whole, thereby improving the manufacturing efficiency of the rotor of the axial magnetic field motor.

[0143] As shown in FIG50 , this embodiment further provides a method for manufacturing a rotor of an axial magnetic field motor, which is used to manufacture the above-mentioned rotor. The manufacturing method includes the following steps:

[0144] S10, machining the inner ring guide disk 41;

[0145] S20, integrally molding the inner ring guide magnetic disk 41 as an insert with the rotor support 1; wherein two adjacent inner ring filling portions 411 of the inner ring guide magnetic disk 41 are respectively located at two ends of the rotor support 1 in the axial direction;

[0146] S30, installing the plurality of unmagnetized inner ring magnetic steel assemblies 31 into the plurality of first slots 111 accordingly;

[0147] S40, magnetizing the plurality of inner ring magnetic steel assemblies 31 as a whole;

[0148] S50, installing the plurality of magnetized outer ring magnetic steel assemblies 32 into the plurality of second slots 112 accordingly;

[0149] S60 , forming a fixing ring 2 on the outer periphery of the rotor bracket 1 , wherein the fixing ring 2 radially constrains the plurality of outer ring magnetic steel assemblies 32 .

[0150] The manufacturing method of the rotor of the axial motor of this embodiment forms a "pseudo-magnetic steel" in the inner ring filling portion 411 by providing an inner ring guide disk 41, thereby reducing the amount of magnetic steel used and lowering the manufacturing cost of the rotor; by arranging adjacent inner ring filling portions 411 to be respectively located at the two axial ends of the rotor bracket 1, the two adjacent inner ring magnetic steel assemblies 31 are respectively located at the two axial ends of the rotor bracket 1, so that the inner ring magnetic steel assemblies 31 on the same side of the rotor bracket 1 are spaced apart more, and the inner ring magnetic steel assemblies 31 can be magnetized as a whole, thereby improving the production efficiency of the rotor and reducing the manufacturing cost of the rotor.

[0151] Example 8

[0152] This embodiment provides a rotor for an axial magnetic field motor. The difference between this embodiment and the seventh embodiment lies in the arrangement of the magnetic disk assembly and the installation of the magnetic steel unit 3, as follows:

[0153] As shown in Figures 21-23, in this embodiment, the rotor of the axial magnetic field motor also includes a rotor support 1, a conductive magnetic disk assembly, and multiple magnetic steel units 3. The rotor support 1 is provided with multiple mounting slots 11 along its circumference. The mounting slots 11 include a first slot body 111 and a second slot body 112. The magnetic steel units 3 include an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32. The inner ring magnetic steel assembly 31 is accommodated in the first slot body 111, and the outer ring magnetic steel assembly 32 is accommodated in the second slot body 112. The conductive magnetic disk assembly includes an outer ring conductive magnetic disk 42, which includes multiple outer ring filling portions 421. Each outer ring filling portion 421 fills a portion of the second slot body 112. The outer ring magnetic steel assembly 32 fills the remaining space in the second slot body 112, and the inner ring magnetic steel assembly 31 is mounted in the first slot body 111. In this embodiment, the outer ring filling portion 421 serves as the filling portion of the conductive disk assembly. This configuration forms a "dummy magnet," thereby reducing the amount of magnetic steel used in the magnetic steel unit 3 and lowering the rotor's manufacturing cost. Alternatively, the outer ring magnetic steel assembly 32 may be secured within the second slot 112 by bonding, magnetic attraction, or other methods, such as the corresponding inner ring filling portion 411, without further limitation.

[0154] It is understood that in this embodiment, as shown in Figure 21, a limiting portion 12 is also provided between the first slot body 111 and the second slot body 112, thereby forming a radial constraint on the inner ring magnetic steel assembly 31. The specific configuration of the limiting portion 12 is the same as that of the seventh embodiment and will not be repeated here.

[0155] Optionally, as shown in Figures 22 and 23, the outer ring guide disk 42 also includes multiple outer ring connecting portions 422, each connected to the rotor support 1. Each outer ring connecting portion 422 connects two adjacent outer ring filling portions 421. The provision of these outer ring connecting portions 422 forms the outer ring guide disk 42 as a single unit, enhancing its structural strength and facilitating connection to the rotor support 1. Each outer ring connecting portion 422 extends circumferentially along the rotor support 1 and is embedded within the rotor support 1. Alternatively, during rotor manufacturing, the outer ring guide disk 42 can be fabricated first and then integrally molded as an insert with the rotor support 1.

[0156] For the rotor of the full-magnet solution (the solution in which the mounting slot 11 is filled with magnetic steel units 3), the distance between two circumferentially adjacent magnets is relatively close, and the clamp of the magnetizing equipment cannot clamp the two adjacent magnets at the same time, resulting in the inability to magnetize the multiple magnets of the rotor as a whole.

[0157] In this regard, in the present application, as shown in Figures 22 and 23, two adjacent outer ring filling portions 421 protrude from either side of the outer ring connecting portion 422, so that the two adjacent outer ring magnetic steel assemblies 32 are located at the axial ends of the rotor bracket 1. By positioning the outer ring filling portions 421, the two circumferentially adjacent outer ring magnetic steel assemblies 32 are located on either side of the rotor bracket 1. Therefore, on the same side of the rotor bracket 1, the outer ring magnetic steel assemblies 32 that need to be magnetized are spaced apart, leaving sufficient space for the magnetization equipment fixture. This allows multiple outer ring magnetic steel assemblies 32 to be magnetized as a whole, thereby improving the manufacturing efficiency of the rotor of the axial magnetic field motor.

[0158] As shown in Figure 22, a fourth protrusion 18 is provided on one of the radially parallel sidewalls of the first slot 111 and the sidewall of the inner ring magnetic steel assembly 31, and a fourth groove 332 is provided on the other side. The fourth protrusion 18 engages with the fourth groove 332. The engagement of the fourth protrusion 18 and the fourth groove 332 allows the rotor support 1 to axially limit the inner ring magnetic steel assembly 31, thereby further strengthening the structure of the entire rotor. In this embodiment, the fourth protrusion 18 is provided on the radially parallel sidewall of the first slot 111, and the fourth groove 332 is provided on the sidewall of the inner ring magnetic steel assembly 31.

[0159] Optionally, as shown in FIG22 , the inner ring magnetic steel assembly 31 includes two radially arranged inner sub-segments 311. Therefore, when installing the inner ring magnetic steel assembly 31, the two inner sub-segments 311 can be installed into the first slot 111 from both ends of the rotor bracket 1 in the axial direction, thereby greatly improving the installation convenience of the inner ring magnetic steel assembly 31. After the two inner sub-segments 311 are installed in the second slot 112, they attract each other, and the structure of the fourth groove 332 and the fourth protrusion 18 is combined to achieve the installation and fixation of the inner ring magnetic steel assembly 31. In addition, by configuring the inner ring magnetic steel assembly 31 to consist of two axially arranged inner sub-segments 311, the rotor's induced eddy current loop can also be split axially, thereby reducing the rotor's eddy current losses.

[0160] As shown in FIG51 , this embodiment further provides a method for manufacturing a rotor of an axial magnetic field motor, which is used to manufacture the above-mentioned rotor. The manufacturing method includes the following steps:

[0161] S101, processing the outer ring guide disk 42;

[0162] S201, the outer ring guide magnetic disk 42 is integrally molded with the rotor support 1 as an insert; wherein two adjacent outer ring filling portions 421 of the outer ring guide magnetic disk 42 are respectively located at two ends of the rotor support 1 in the axial direction;

[0163] S301, installing a plurality of unmagnetized outer ring magnetic steel assemblies 32 into the second slot 112;

[0164] S401, magnetizing the plurality of outer ring magnetic steel assemblies 32 as a whole;

[0165] S501 , installing the plurality of inner ring magnetic steel assemblies 31 into the plurality of first slots 111 accordingly.

[0166] The manufacturing method of the rotor of the axial motor of this embodiment forms a "pseudo-magnetic steel" in the outer ring filling portion 421 by providing an outer ring guide disk 42, thereby reducing the amount of magnetic steel used and lowering the manufacturing cost of the rotor; by arranging adjacent outer ring filling portions 421 to be respectively located at the two axial ends of the rotor bracket 1, the two adjacent outer ring magnetic steel assemblies 32 are respectively located at the two axial ends of the rotor bracket 1, so that the outer ring magnetic steel assemblies 32 on the same side of the rotor bracket 1 are spaced apart more, and the outer ring magnetic steel assemblies 32 can be magnetized as a whole, thereby improving the production efficiency of the rotor and reducing the manufacturing cost of the rotor.

[0167] Optionally, the rotor manufacturing method of the axial magnetic field motor of this embodiment, as shown in FIG24 , further includes, before magnetizing the outer ring magnetic steel assembly 32 as a whole in step S401:

[0168] S35 , wrapping a tightening band around the outer circumference of the rotor support 1 to form a fixing ring 2 that radially stops the magnetic steel unit 3 by die-casting.

[0169] The rotor is assembled as follows: Multiple magnetic units are magnetized individually; the magnetized magnets are installed in their corresponding mounting slots; and a retaining ring is formed around the outer periphery of the rotor bracket to provide radial restraint for the multiple magnetic units. Since the magnetic units are already magnetized, excessively high temperatures in the formed retaining rings can cause demagnetization. Therefore, the retaining ring molding temperature is limited, and the preload force of the formed retaining ring is also limited. Consequently, the radial restraint force provided by the retaining ring on the magnetic units is limited, making it incapable of meeting the requirements for high-speed rotor operation.

[0170] In this embodiment, the rotor manufacturing method for an axial magnetic field motor forms the retaining ring 2 before magnetizing the outer ring magnetic steel assembly 32. This allows the retaining ring 2 to be formed at an unrestricted temperature. This provides a higher preload force on the magnetic steel unit 3, i.e., greater radial constraint, enabling the rotor and motor to meet high-speed applications. The tightening band can be made of carbon fiber.

[0171] Example 9

[0172] This embodiment provides a rotor for an axial magnetic field motor, which differs from the seventh and eighth embodiments in the arrangement of the conductive disk assembly and the arrangement of the magnetic steel unit 3, as follows:

[0173] As shown in Figures 25-29, in this embodiment, the rotor of the axial magnetic field motor also includes a rotor support 1, a conductive magnetic disk assembly, and multiple magnetic steel units 3. The rotor support 1 is circumferentially provided with multiple mounting slots 11. The mounting slots 11 include a first slot 111 and a second slot 112. The magnetic steel units 3 include an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32. The inner ring magnetic steel assembly 31 is housed in the first slot 111, and the outer ring magnetic steel assembly 32 is housed in the second slot 112. The conductive magnetic disk assembly includes an inner ring conductive magnetic disk 41 and an outer ring conductive magnetic disk 42. The inner ring conductive magnetic disk 41 includes multiple inner ring filling portions 411, and the outer ring conductive magnetic disk 42 includes multiple outer ring filling portions 421. Each inner ring filling portion 411 and outer ring filling portion 421 constitute a filling portion. In this embodiment, the inner ring filling portions 411 and the inner ring magnetic steel assembly 31 together fill the first slot 111, while the outer ring filling portions 421 and the outer ring magnetic steel assembly 32 together fill the second slot 112. This arrangement of the present embodiment makes it easier to set the total volume of the magnetic steel unit 3 to 50% of the volume of the installation slot 11 .

[0174] In this embodiment, the inner ring guide disk 41 also includes multiple inner ring connecting portions 412, which connect two adjacent inner ring filling portions 411. The materials and structure of the inner ring guide disk 41 can be referenced in the seventh embodiment and will not be further described here. The outer ring guide disk 42 includes multiple outer ring connecting portions 422, which connect two adjacent outer ring filling portions 421. The materials and structure of the outer ring guide disk 42 can be referenced in the eighth embodiment and will not be further described here.

[0175] In this embodiment, during rotor manufacturing, the inner ring guide magnetic disk 41 and the outer ring guide magnetic disk 42 can first be machined. The inner ring guide magnetic disk 41 and the outer ring guide magnetic disk 42 are then molded integrally with the rotor support 1 as inserts. After molding, as shown in Figures 28 and 29 , the inner ring connecting portion 412 and the outer ring connecting portion 422 are both embedded within the rotor support 1.

[0176] It is understood that in this embodiment, as shown in Figure 25, a limiting portion 12 is also provided between the first slot body 111 and the second slot body 112, thereby forming a radial constraint on the inner ring magnetic steel assembly 31. The specific configuration of the limiting portion 12 is the same as that of the seventh embodiment and will not be repeated here.

[0177] Furthermore, in this embodiment, grooves and bosses are not required on the sidewalls of the inner ring magnetic steel assembly 31 and the first slot body 111. Instead, the inner ring magnetic steel assembly 31 is fixedly mounted within the first slot body 111 by magnetic attraction to the inner ring filling portion 411 and bonding to the rotor bracket 1. Similarly, grooves and bosses are not required on the sidewalls of the outer ring magnetic steel assembly 32 and the second slot body 112. Instead, the outer ring magnetic steel assembly 32 is fixedly mounted within the second slot body 112 by magnetic attraction to the outer ring filling portion 421 and bonding to the rotor bracket 1.

[0178] This embodiment further provides a method for manufacturing a rotor of an axial magnetic field motor, which is used to manufacture the above-mentioned rotor. The manufacturing method comprises the following steps:

[0179] S1011, processing the inner ring guide magnetic disk 41 and the outer ring guide magnetic disk 42 respectively;

[0180] S2011, the inner ring guide magnetic disk 41 and the outer ring guide magnetic disk 42 are integrally molded as inserts with the rotor support 1; wherein the two adjacent inner ring filling portions 411 of the inner ring guide magnetic disk 41 are respectively located at two ends of the rotor support 1 in the axial direction; and the two adjacent outer ring filling portions 421 of the outer ring guide magnetic disk 42 are respectively located at two ends of the rotor support 1 in the axial direction.

[0181] S3011, installing the plurality of unmagnetized inner ring magnetic steel assemblies 31 into the plurality of first slots 111, and installing the plurality of unmagnetized outer ring magnetic steel assemblies 32 into the plurality of second slots 112;

[0182] S351, wrapping a tightening band around the outer circumference of the rotor support 1 to form a fixing ring 2 that radially stops the outer ring magnetic steel assembly 32;

[0183] S4011, magnetize the multiple inner ring magnetic steel assemblies 31 and the multiple outer ring magnetic steel assemblies 32 as a whole.

[0184] The manufacturing method of the rotor of the axial magnetic field motor of this embodiment is to provide an inner ring conductive magnetic disk 41 and an outer ring conductive magnetic disk 42 so that the inner ring filling part 411 and the outer ring filling part 421 form a "pseudo magnetic steel", thereby reducing the amount of magnetic steel used and lowering the manufacturing cost of the rotor; by arranging the adjacent inner ring filling parts 411 to be respectively located at the two axial ends of the rotor bracket 1, so that the two adjacent inner ring magnetic steel assemblies 31 are respectively located at the two axial ends of the rotor bracket 1, and by arranging the outer ring filling parts 421 to be respectively located at the two axial ends of the rotor bracket 1, so that the two adjacent outer ring magnetic steel assemblies 32 are respectively located at the two axial ends of the rotor bracket 1, so that the inner ring magnetic steel assemblies 31 and the outer ring magnetic steel assemblies 32 on the same side of the rotor bracket 1 are spaced apart more widely, and thus the inner ring magnetic steel assemblies 31 and the outer ring magnetic steel assemblies 32 can be magnetized as a whole, thereby improving the production efficiency of the rotor and reducing the manufacturing cost of the rotor. Furthermore, by molding the retaining ring 2 before magnetizing the magnetic steel unit 3, the molding temperature of the retaining ring 2 is not restricted, thereby providing a higher preload force on the magnetic steel unit 3, that is, a higher radial constraint, thereby enabling the rotor and motor to meet high-speed applications. The tightening band can be made of carbon fiber material.

[0185] The rotor of the axial magnetic field motor of the present application has the following advantages:

[0186] (1) By using a conductive magnetic disk assembly made of a conductive material to fill part of the installation slots, "pseudo magnets" are formed at multiple installation slots, and the magnetic steel unit only needs to fill the remaining space of the installation slot, thereby reducing the amount of magnetic steel used in the entire rotor and further reducing the manufacturing cost of the rotor.

[0187] (2) By arranging two adjacent inner ring filling portions to be located at the two axial ends of the rotor bracket, the two circumferentially adjacent inner ring magnetic steel assemblies are respectively located on both sides of the rotor bracket. Therefore, on the same side of the rotor bracket, the inner ring magnetic steel assemblies that need to be magnetized are arranged at intervals to leave enough space for setting the fixture of the magnetizing equipment, so that multiple inner ring magnetic steel assemblies can be magnetized as a whole, thereby improving the manufacturing efficiency of the rotor of the axial magnetic field motor.

[0188] (3) By arranging the two adjacent outer ring filling parts to be located at the two ends of the rotor bracket in the axial direction, the two outer ring magnetic steel assemblies adjacent in the circumferential direction are respectively located on both sides of the rotor bracket. Therefore, on the same side of the rotor bracket, the outer ring magnetic steel assemblies that need to be magnetized are arranged at intervals to leave enough space for setting the fixture of the magnetizing equipment, so that multiple outer ring magnetic steel assemblies can be magnetized as a whole, thereby improving the manufacturing efficiency of the rotor of the axial magnetic field motor.

[0189] Example 10

[0190] This embodiment provides a rotor of an axial magnetic field motor and an axial magnetic field motor. The axial magnetic field motor includes at least one stator and a rotor of the above-mentioned axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two stators and a rotor of the above-mentioned axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two rotors of the above-mentioned axial magnetic field motor and a stator. The rotor of the axial magnetic field motor in this embodiment greatly reduces the amount of magnetic steel used while sacrificing less magnetic flux, and reduces the manufacturing cost of the rotor. The axial magnetic field motor reduces the production cost by providing the above-mentioned rotor.

[0191] As shown in Figure 2, the rotor of the axial magnetic field motor includes a rotor support 1, multiple magnetic steel units 3 and a fixed ring 2. The rotor support 1 has a circular outline and is provided with multiple mounting grooves 11 along its circumference. Optionally, the multiple mounting grooves 11 are evenly distributed along the circumference of the rotor support 1. Each magnetic steel unit 3 is correspondingly installed in a mounting groove 11. The magnetic steel unit 3 includes an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32 arranged in the radial direction. The inner ring magnetic steel assembly 31 is axially divided into at least one inner sub-segment 311, and the outer ring magnetic steel assembly 32 is axially divided into at least one outer sub-segment 321. In the same magnetic steel unit 3, at least one of the inner sub-segment 311 and the outer sub-segment 321 is a magnetic steel, and the rest are magnetizers.

[0192] In the rotor of this embodiment, the magnetic steel unit 3 is radially and axially segmented. In each magnetic steel unit 3, at least one sub-segment is made of magnetic steel, while the remaining sub-segments are made of magnetic conductors. Since the magnetic resistance of the magnetic conductors is very small, they are equivalent to forming "pseudo-magnets". Therefore, the amount of magnetic steel used is greatly reduced at the expense of less magnetic flux. The cost of magnetic conductors is much lower than that of magnetic steel, thereby reducing the manufacturing cost of the rotor.

[0193] In this embodiment, the mounting groove 11 penetrates the circumferential surface of the rotor bracket 1 , thereby facilitating the installation of the outer ring magnetic steel assembly 32 .

[0194] Optionally, in each magnetic steel unit 3, the volume of the magnetic steel accounts for 50% of the total volume of the magnetic steel unit 3. It is understandable that as the amount of magnetic steel used decreases, the magnetic flux at each magnetic steel unit 3, the torque and power of the motor manufactured by the rotor will all decrease. Through experimental verification, when the amount of magnetic steel used is halved, the magnetic flux at each magnetic steel unit 3 can be maintained at 80%-85% of the full magnetic steel solution (that is, the entire magnetic steel unit 3 is made of magnetic steel), and the torque and power of the motor manufactured by the rotor can reach 80%-90% of the full magnetic steel solution. By controlling the volume ratio of the magnetic steel relative to the magnetic steel unit 3, it is possible to achieve a significant reduction in the amount of magnetic steel used while sacrificing less magnetic flux, thereby reducing the manufacturing cost of the rotor and the axial magnetic field motor. Optionally, the magnetizer is made of soft magnetic materials such as silicon steel or other materials with high magnetic permeability. Optionally, the rotor bracket 1 can be made of non-magnetic material.

[0195] In some embodiments, as shown in FIG3 , the inner ring magnetic steel assembly 31 is axially divided into two inner sub-segments 311, while the outer ring magnetic steel assembly 32 is unsegmented. In practice, it is possible to select, based on actual needs, only one of the inner sub-segments 311, only both of the inner sub-segments 311, or only the outer ring magnetic steel assembly 32.

[0196] In this embodiment, as shown in Figure 30 , the inner ring magnetic steel assembly 31 is axially divided into two inner sub-segments 311, one of which is made of a magnetic conductor and the other of which is made of magnetic steel. The outer ring magnetic steel assembly 32 is axially divided into two outer sub-segments 321, one of which is made of a magnetic conductor and the other of which is made of magnetic steel. This arrangement facilitates achieving a 50% volume fraction of magnetic steel within a magnetic steel unit 3, thereby achieving higher magnetic flux at a lower cost. It is understood that in other embodiments, the materials used to manufacture the inner and outer sub-segments 311, 321, and thereby adjust the volume fraction of the magnetic steel relative to the entire magnetic steel unit 3 can be flexibly adjusted based on actual needs, without specific limitations here. Optionally, the two inner sub-segments 311 of the inner ring magnetic steel assembly 31 can be connected magnetically or by bonding with magnetic adhesive. The two outer sub-segments 321 of the outer ring magnetic steel assembly 32 can be connected magnetically or by bonding with magnetic adhesive.

[0197] For the rotor of the full magnetic steel solution (i.e., the entire magnetic steel unit 3 is made of magnetic steel), the distance between two circumferentially adjacent magnetic steels is relatively close, and the clamp of the magnetizing equipment cannot clamp the two adjacent magnetic steels at the same time. As a result, the multiple magnetic steels of the rotor cannot be magnetized as a whole, which increases the manufacturing difficulty of the rotor and reduces the manufacturing efficiency of the rotor.

[0198] In this regard, in some embodiments, on the same side of the rotor support 1, one of two circumferentially adjacent inner sub-segments 311 is a magnetic steel and the other is a magnetizer. Therefore, on the same side of the rotor support 1, the inner sub-segments 311 (i.e., magnetic steel) that need to be magnetized are spaced apart, increasing the distance between adjacent magnetic steels. This allows the magnetizing equipment fixture to simultaneously magnetize the magnets of multiple inner ring magnetic steel assemblies 31, thereby reducing the difficulty of rotor manufacturing and improving rotor manufacturing efficiency.

[0199] In some embodiments, on the same side of the rotor support 1, one of two circumferentially adjacent outer sub-segments 321 is a magnetic steel and the other is a magnetizer. Therefore, on the same side of the rotor support 1, the outer sub-segments 321 (i.e., magnetic steel) that need to be magnetized are spaced apart, increasing the distance between adjacent magnets. This allows the magnetizing equipment fixture to simultaneously magnetize the magnets of multiple outer ring magnetic steel assemblies 32, thereby reducing the difficulty of rotor manufacturing and improving rotor manufacturing efficiency.

[0200] In some embodiments, on the same side of the rotor support 1, one of two circumferentially adjacent inner sub-segments 311 is made of magnetic steel, and the other is a magnetizer. Simultaneously, on the same side of the rotor support 1, one of two circumferentially adjacent outer sub-segments 321 is made of magnetic steel, and the other is a magnetizer. In this embodiment, the magnetic steel of the inner ring magnetic steel assembly 31 and the magnetic steel of the outer ring magnetic steel assembly 32 can be magnetized simultaneously, further improving rotor manufacturing efficiency.

[0201] In some embodiments, after the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are installed on the rotor bracket 1, the formed fixing ring 2 is placed on the rotor bracket 1, thereby radially constraining the multiple magnetic steel units 3 to overcome the centrifugal force when the magnetic steel units 3 rotate.

[0202] In other methods, after the inner and outer ring magnetic steel assemblies 31 and 32 are mounted on the rotor support 1, the retaining ring 2 is directly molded onto the rotor support 1 through compression molding. Because the magnetic steel unit 3 is already magnetized, excessively high molding temperatures for the retaining ring 2 can cause demagnetization. Therefore, the molding temperature for the retaining ring 2 is limited, and the preload force of the molded retaining ring 2 is also limited. Consequently, the radial restraining force that the retaining ring 2 can provide on the magnetic steel unit 3 is limited, making it incapable of meeting the requirements for high-speed rotor operation.

[0203] Optionally, in this embodiment, the retaining ring 2 is formed by curing multiple layers of carbon fiber wrapped around the rotor support 1 before the outer sub-segment 321, made of magnetic steel, is magnetized. Because the retaining ring 2 is formed before the magnetic steel is magnetized, the molding temperature of the retaining ring 2 is not restricted. This provides a higher preload force on the magnetic steel unit 3, thereby providing greater radial constraint, thereby enabling the rotor and motor to meet high-speed applications.

[0204] As shown in FIG52 , this embodiment further provides a method for manufacturing a rotor of an axial magnetic field motor, which is used to manufacture the above-mentioned rotor. The method for manufacturing a rotor of an axial magnetic field motor includes:

[0205] S10111. Each inner ring magnetic steel assembly 31 includes two inner sub-segments 311, one of which is a magnetic steel and the other is a magnetic conductor. Each outer ring magnetic steel assembly 32 includes two outer sub-segments 321, one of which is a magnetic steel and the other is a magnetic conductor.

[0206] S20111. Install multiple outer ring magnetic steel assemblies 32 onto the rotor support 1, and ensure that on the same side of the rotor support 1, one of two circumferentially adjacent outer sub-segments 321 is a magnetic steel and the other is a magnetic conductor;

[0207] S30111. Install multiple inner ring magnetic steel assemblies 31 onto the rotor support 1, and ensure that on the same side of the rotor support 1, one of two circumferentially adjacent inner sub-segments 311 is a magnetic steel and the other is a magnetic conductor;

[0208] S40111, magnetizing the magnetic steels in the multiple inner ring magnetic steel assemblies 31 and / or the magnetic steels in the multiple outer ring magnetic steel assemblies 32 as a whole;

[0209] S50111. Form a fixing ring 2 on the outer periphery of the rotor bracket 1 to radially constrain the multiple outer ring magnetic steel assemblies 32.

[0210] The manufacturing method of the rotor of the axial magnetic field motor of this embodiment is such that the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are both arranged to be composed of two sub-segments, and on the same side of the rotor bracket 1, the magnetic steels that need to be magnetized in the inner ring magnetic steel assembly 31 are arranged at intervals, and the magnetic steels that need to be magnetized in the outer ring magnetic steel assembly 32 are arranged at intervals, so that the overall magnetization of the inner ring magnetic steel assembly 31 and / or the outer ring magnetic steel assembly 32 can be achieved, thereby improving the manufacturing efficiency of the rotor.

[0211] Optionally, before magnetizing the magnets in the multiple outer ring magnetic steel assemblies 32 as a whole, carbon fiber is wrapped around the outer circumference of the rotor support 1 to form a retaining ring 2 by compression molding. Because the retaining ring 2 is molded before the magnets are magnetized, the molding temperature of the retaining ring 2 is not restricted. This can provide a higher preload force on the magnetic steel unit 3, that is, a higher radial constraint, thereby enabling the rotor and motor to meet high-speed applications.

[0212] In some embodiments, a schematic diagram of a rotor assembled through the following steps is shown in FIG31 , where the rotor assembly steps are:

[0213] (1) Install multiple outer ring magnetic steel assemblies 32 (the outer sub-segments 321 made of magnetic steel have not yet been magnetized) onto the rotor bracket 1;

[0214] (2) Winding carbon fibers around the outer periphery of the rotor bracket 1 to form a fixing ring 2 by molding;

[0215] (3) Installing multiple inner ring magnetic steel assemblies 31 (the inner sub-segments 311 made of magnetic steel have not yet been magnetized) onto the rotor bracket 1;

[0216] (4) The magnetic steels of the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are magnetized as a whole.

[0217] In some embodiments, as shown in FIG32 , the steps of assembling the rotor may also be:

[0218] (1) Install multiple inner ring magnetic steel assemblies 31 and multiple outer ring magnetic steel assemblies 32 on the rotor bracket 1 (all magnetic steels are not magnetized at this time);

[0219] (2) Winding carbon fibers around the outer periphery of the rotor bracket 1 to form a fixing ring 2 by molding;

[0220] (3) The magnetic steels of the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are magnetized as a whole.

[0221] Example 11

[0222] This embodiment provides a rotor for an axial magnetic field motor. It shares the same inventive concept as the tenth embodiment, and the similarities are not further described here. The difference lies in the provision of a limiting portion 12 on the rotor support 1. As shown in Figures 2 and 33A, the rotor support 1 is formed with multiple limiting portions 12, each radially limiting an inner ring magnetic steel assembly 31. The limiting portions 12 on the rotor support 1 radially constrain the inner ring magnetic steel assembly 31 to overcome centrifugal forces during rotation, while the retaining ring 2 radially constrains the outer ring magnetic steel assembly 32 to overcome centrifugal forces during rotation. The rotor provides radial constraint to the magnetic steel units 3 in separate zones, meaning that the rotor support 1 shares some of the centrifugal forces of the magnetic steel units 3. Therefore, while the retaining ring 2 maintains a certain restraining force, it can constrain the outer ring magnetic steel assembly 32, which rotates at a higher speed. The entire rotor can effectively constrain the magnetic steel units 3, rotating at higher speeds, thus adapting to the high-speed applications of axial magnetic field motors.

[0223] As shown in FIG33A , the mounting groove 11 includes a first groove body 111 and a second groove body 112 arranged radially from the inside to the outside. The inner ring magnetic steel assembly 31 is mounted in the first groove body 111, and the outer ring magnetic steel assembly 32 is mounted in the second groove body 112. The rotor bracket 1 forms a limiting portion 12 between the first groove body 111 and the second groove body 112, and at least part of the outer circumferential surface of the inner ring magnetic steel assembly 31 abuts against the limiting portion 12. By configuring the mounting groove 11 to be composed of two groove bodies, it is not only convenient to support and limit the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 respectively, but also convenient to form the limiting portion 12 on the rotor bracket 1. In this embodiment, the first groove body 111 and the second groove body 112 are both constructed as fan ring structures.

[0224] In some embodiments, as shown in FIG2 and FIG33A , in this embodiment, the first slot body 111 and the second slot body 112 are connected, and the outer circumferential size of the first slot body 111 is larger than the inner circumferential size of the second slot body 112, thereby forming a stepped stopper 12. The outer circumferential surface of the inner ring magnetic steel assembly 31 abuts against the stepped stopper 12, thereby causing the stopper 12 to radially constrain the inner ring magnetic steel assembly 31. Optionally, along the circumferential direction, both ends of the outer ring of the first slot body 111 form the aforementioned steps, which respectively abut against the ends of the circumferential surface of the inner ring magnetic steel assembly 31, thereby making the force applied to the inner ring magnetic steel assembly 31 more uniform, thereby ensuring that the inner ring magnetic steel assembly 31 is effectively constrained when the rotor rotates at high speed.

[0225] As shown in Figure 33A, in this embodiment, one of the radially parallel sidewalls of the first slot 111 and the sidewall of the inner ring magnetic steel assembly 31 is provided with a first protrusion 15, and the other is provided with a first groove 312. The first protrusion 15 engages with the first groove 312. Through the cooperation of the first protrusion 15 and the first groove 312, the rotor support 1 axially limits the inner ring magnetic steel assembly 31, thereby strengthening the structure of the entire rotor and preventing the rotor from falling apart during high-speed rotation. In this embodiment, the first protrusion 15 is provided on both sidewalls of the first slot 111, and the first groove 312 is provided on both sidewalls of the inner ring magnetic steel assembly 31. Each first protrusion 15 engages with a first groove 312.

[0226] Similarly, one of the radially parallel sidewalls of the second trough 112 and the sidewall of the outer ring magnetic steel assembly 32 is provided with a second protrusion 16, and the other is provided with a second groove 322. The second protrusion 16 engages with the second groove 322. The engagement of the second protrusion 16 and the second groove 322 allows the rotor support 1 to axially limit the outer ring magnetic steel assembly 32, further enhancing the structural robustness of the entire rotor and preventing the rotor from falling apart during high-speed rotation. In this embodiment, the second protrusion 16 is provided on both sidewalls of the second trough 112, and the second groove 322 is provided on both sidewalls of the outer ring magnetic steel assembly 32. Each second protrusion 16 engages with a second groove 322.

[0227] In some embodiments, as shown in FIG33B , the first slot body 111 and the second slot body 112 are not connected. The solid structure between the first slot body 111 and the second slot body 112 constitutes a limiting portion 12. Each limiting portion 12 has the same circumferential extension trajectory as the corresponding inner ring magnetic steel assembly 31. That is, the outer circumferential surface of the inner ring magnetic steel assembly 31 is completely aligned with a corresponding limiting portion 12. This can provide a more stable and uniform radial constraint on the inner ring magnetic steel assembly 31 to overcome the centrifugal force during rotation, making the rotor structure more stable and reliable during high-speed rotation. As shown in FIG33B , multiple limiting portions 12 together form a ring structure. This structure improves the structural strength of the rotor support 1 itself, thereby preventing the rotor from falling apart during high-speed rotation.

[0228] The rotor of the axial magnetic field motor of the present application has the following advantages:

[0229] (1) The magnetic steel unit is segmented radially and axially, and in each magnetic steel unit, at least one sub-segment is made of magnetic steel, while the remaining sub-segments are made of magnetic conductors. Since the magnetic resistance of the magnetic conductors is very small, it is equivalent to forming "pseudo-magnets", thereby greatly reducing the amount of magnetic steel used while sacrificing less magnetic flux. The cost of magnetic conductors is much lower than that of magnetic steel, thus reducing the manufacturing cost of the rotor.

[0230] (2) By rationally arranging the inner sub-segment of the inner ring magnetic steel assembly and the outer sub-segment of the outer ring magnetic steel assembly, the magnets in the inner ring magnetic steel assembly and the magnets in the outer ring magnetic steel assembly can be magnetized as a whole, thereby improving the manufacturing efficiency of the rotor.

[0231] (3) By making the volume of the magnetic steel in the same magnetic steel unit 50% relative to the volume of the magnetic steel unit, the amount of magnetic steel used is reduced as much as possible while minimizing the magnetic flux loss, thereby reducing the manufacturing cost of the rotor.

[0232] Example 12

[0233] This embodiment provides a rotor for an axial magnetic field motor and an axial magnetic field motor. The axial magnetic field motor includes at least one stator and a rotor for the axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two stators and a rotor for the axial magnetic field motor. In some embodiments, the axial magnetic field motor can also be provided with two rotors for the axial magnetic field motor and a stator. The rotor of the axial magnetic field motor in this embodiment can reliably constrain the magnetic steel monomer even when rotating at high speed, thereby enabling the motor equipped with the rotor to output higher-speed rotation, meeting the development trend of high-speed motors.

[0234] As shown in Figure 34, the rotor of the axial magnetic field motor includes a rotor support 1, multiple magnetic steel units 3, a fixing ring 2, and a restraining mechanism 5. As shown in Figures 35 and 36, the rotor support 1 has a circular profile and is provided with multiple mounting slots 11 along its circumference. Optionally, the multiple mounting slots 11 are evenly distributed along the circumference of the rotor support 1. The mounting slots 11 include a first slot body 111 and a second slot body 112. The first slot body 111 and the second slot body 112 are arranged radially along the rotor support 1, with the first slot body 111 radially inward of the second slot body 112. As shown in Figures 34 and 35, the magnetic steel units 3 include an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32 arranged radially along the rotor support 1. The inner ring magnetic steel assembly 31 is mounted within the first slot body 111, and the outer ring magnetic steel assembly 32 is mounted within the second slot body 112. As shown in Figures 34, 35, and 37, the restraining mechanism 5 includes a connecting assembly 51 and multiple inner ring sleeves 52. The connecting assembly 51 is connected to the rotor support 1. The inner ring sleeves 52 are tensioned, with the connecting assembly 51 sleeved on the first end of the inner ring sleeve 52 and at least one inner ring magnetic steel assembly 31 sleeved on the second end. The inner ring sleeves 52 can radially restrain the inner ring magnetic steel assembly 31 they are sleeved on. As shown in Figure 34, the retaining ring 2 is mounted around the rotor support 1 and radially limits the outer ring magnetic steel assembly 32.

[0235] In the rotor of the axial magnetic field motor of this embodiment, each magnetic steel unit 3 is configured as an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32 arranged radially. The constraint mechanism 5 radially constrains the inner ring magnetic steel assembly 31 and overcomes the centrifugal force when the inner ring magnetic steel assembly 31 rotates. The fixed ring 2 radially constrains the outer ring magnetic steel assembly 32 and overcomes the centrifugal force when the outer ring magnetic steel assembly 32 rotates. That is, the above-mentioned rotor radially segments the magnetic steel unit 3 and simultaneously provides the constraint mechanism 5 to share the centrifugal force of the inner ring magnetic steel assembly 31. Therefore, under the premise that the constraint force of the fixed ring 2 is certain, the outer ring magnetic steel assembly 32 rotating at a higher speed can be constrained, and the entire rotor can meet the requirements of effectively constraining the magnetic steel unit 3 rotating at a higher speed, thereby enabling the motor provided with the rotor to output a higher speed while ensuring a firm structure.

[0236] The N and N poles of two circumferentially adjacent magnetic steel units 3 are opposite. The number of magnetic steel units 3 is even, and each pair of adjacent magnetic steel units 3 forms a pole pair. In this embodiment, both the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are constructed as fan-shaped ring structures. The inner ring sheath 52 is disposed around at least the circumference of the inner ring magnetic steel assembly 31.

[0237] Optionally, as shown in Figures 35 and 36 , one of the radially parallel sidewalls of the first slot 111 and the inner ring magnetic steel assembly 31 is provided with a first groove 312, while the other is provided with a first protrusion 15. The first groove 312 engages with the first protrusion 15. The engagement of the first groove 312 and the first protrusion 15 allows the rotor support 1 to axially limit the inner ring magnetic steel assembly 31, resulting in a simple structure, reliable restraint, and improved structural robustness of the entire rotor. In this embodiment, the inner ring magnetic steel assembly 31 is provided with the first protrusion 15, and the first groove 312 is provided on the sidewall of the first slot 111.

[0238] As shown in Figures 35 and 36 , one of the radially parallel sidewalls of the second slot 112 and the outer ring magnetic assembly 32 is provided with a second groove 322, while the other is provided with a second protrusion 16. The second protrusion 16 engages with the second groove 322. The engagement of the second groove 322 and the second protrusion 16 allows the rotor support 1 to axially limit the outer ring magnetic assembly 32, resulting in a simple structure and reliable restraint, further enhancing the structural strength of the entire rotor. In this embodiment, the outer ring magnetic assembly 32 is provided with the second groove 322, and the second protrusion 16 is provided on the sidewall of the second slot 112.

[0239] Optionally, as shown in Figures 37-39, a limiting portion 12 is formed between the first slot 111 and the second slot 112. The limiting portion 12 radially limits the corresponding inner ring magnetic steel assembly 31. This means that the rotor support 1 also radially constrains the inner ring magnetic steel assembly 31. Specifically, the constraint mechanism 5 and the limiting portion 12 of the rotor support 1 jointly bear the centrifugal force of the inner ring magnetic steel assembly 31 during rotation, thereby ensuring that the inner ring magnetic steel assembly 31 maintains a secure structure even when the rotor rotates at high speeds, enabling the motor to adapt to high-speed applications of axial magnetic field motors.

[0240] In this embodiment, as shown in Figures 36, 37, and 39, the first trough body 111 and the second trough body 112 are connected, and the second protrusion 16 provided on the sidewall of the second trough body 112, facing the end surface of the first trough body 111, constitutes the stopper 12. In some embodiments (not shown), the outer circumference of the first trough body 111 is larger than the inner circumference of the second trough body 112, thereby forming the stopper 12. In other embodiments, the first trough body 111 and the second trough body 112 can also be disconnected, and the physical structure between the first trough body 111 and the second trough body 112 constitutes the stopper 12.

[0241] In some embodiments, as shown in Figure 39, the constraint mechanism 5 is configured as follows: the number of inner ring magnetic steel assemblies 31 covered by each inner ring sleeve 52 is one, that is, each inner ring sleeve 52 corresponds to constraining one inner ring magnetic steel assembly 31. In this embodiment, the number of inner ring sleeves 52, the number of magnetic steel units 3, and the number of mounting slots 11 are all the same.

[0242] As shown in Figures 35, 39, and 40, the connecting assembly 51 includes multiple columns 511. In this embodiment, the number of columns 511 is the same as the number of inner ring sleeves 52. The columns 511 extend axially through the rotor support 1. Multiple first accommodating grooves 131 are defined within the rotor support 1. Each inner ring sleeve 52 is positioned within a first accommodating groove 131, with one column 511 positioned at the first end and one inner ring magnetic assembly 31 positioned at the second end. The rotor support 1 radially constrains the columns 511, while the inner ring sleeve 52, when fitted over the columns 511 and the inner ring magnetic assembly 31, radially constrains the inner ring magnetic assembly 31. Furthermore, the first accommodating grooves 131 limit the inner ring sleeve 52, ensuring its stable position and, therefore, its reliable constraint on the inner ring magnetic assembly 31.

[0243] In this embodiment, as shown in FIG35 , the connection assembly 51 further includes a first pressure plate 512 and a second pressure plate 513 , which are respectively disposed on either side of the rotor support 1 . The first end of the column 511 is fixedly connected to the first pressure plate 512 , and the second end is fixedly connected to the second pressure plate 513 . When the constraint mechanism 5 is installed, the first pressure plate 512 is located on one side of the rotor support 1 , and the column 511 is connected to the second pressure plate 513 after passing through the rotor support 1 . Optionally, the second pressure plate 513 is provided with a plurality of mounting holes 5131 , each column 511 being insertable into a corresponding mounting hole 5131 . The first pressure plate 512 and the second pressure plate 513 can constrain the column 511 in the axial direction. The rotor typically has a bearing pressure plate. In this embodiment, the first pressure plate 512 and the second pressure plate 513 can be locked in axial position by the bearing pressure plate.

[0244] Optionally, as shown in Figures 36, 37, and 40, the rotor support 1 includes two support units 13, which are axially arranged and symmetrically arranged. That is, the two support units 13 snap together to form the rotor support 1. The two support units 13 have first half-slots on their sides facing each other, and the two first half-slots are joined to form a first receiving groove 131. By configuring the rotor support 1 as two support units 13, not only is the machining of the first receiving groove 131 facilitated, but also the installation of the inner ring sheath 52 and inner ring magnetic steel assembly 31 is facilitated.

[0245] In this embodiment, as shown in Figure 40, the first receiving groove 131 is disposed around the first slot body 111 and is in communication with the first slot body 111. As shown in Figure 39, after the inner ring magnetic steel assembly 31 is installed in the first slot body 111 and the inner ring sleeve 52 is installed in the first receiving groove 131, the inner ring sleeve 52 contacts not only the circumferential surface of the inner ring magnetic steel assembly 31 but also the radially parallel surface of the inner ring magnetic steel assembly 31. This increases the contact area between the inner ring sleeve 52 and the inner ring magnetic steel assembly 31 through the provision of the first receiving groove 131 and the first slot body 111, thereby ensuring a tighter and more reliable restraint of the inner ring sleeve 52 on the inner ring magnetic steel assembly 31. As shown in Figure 40, in this embodiment, a first groove 312 is provided on the sidewall of the first slot body 111, thereby sequentially connecting the first receiving groove 131, the first groove 312, and the first slot body 111.

[0246] The assembly steps of the rotor of this embodiment are: processing two bracket monomers 13; then, as shown in Figure 37, multiple first pressure plates 512 are set on one side of the first bracket monomer 13, and multiple columns 511 are passed through multiple avoidance holes 19 on the bracket monomer 13; then, as shown in Figure 37, multiple inner ring sleeves 52 and multiple inner ring magnetic steel assemblies 31 are respectively installed in the corresponding first half slots and the first slot body 111, at this time, the inner ring sleeves 52 are sleeved with the corresponding inner ring magnetic steel assemblies 31; then, the second bracket monomer 13 is buckled with the first bracket monomer 13, and multiple columns 511 are correspondingly passed through the avoidance holes 19 on the second bracket monomer 13; then, the second pressure plate 513 is plugged into the multiple columns 511; then, the multiple outer ring magnetic steel assemblies 32 are respectively inserted into the corresponding second slot body 112 along the radial direction of the rotor bracket 1; and a fixing ring 2 is formed on the outer periphery of the bracket monomer 13.

[0247] As shown in FIG41 , in some embodiments, the constraint mechanism 5 can be configured such that each inner ring sheath 52 encloses two inner ring magnetic steel assemblies 31. That is, each inner ring sheath 52 constrains two inner ring magnetic steel assemblies 31. In this embodiment, the number of inner ring sheaths 52 is half the number of inner ring magnetic steel assemblies 31. Optionally, the number of pillars 511 is the same as the number of inner ring magnetic steel assemblies 31 and is provided in a one-to-one correspondence with each inner ring magnetic steel assembly 31, with each inner ring sheath 52 enclosing two pillars 511. The pillars 511 can define the extension trajectory of the inner ring sheath 52, thereby ensuring that the inner ring sheath 52 is in good contact with the two inner ring magnetic steel assemblies 31. It is understood that in some embodiments, the constraint mechanism 5 can also be configured such that each inner ring sheath 52 encloses three or more inner ring magnetic steel assemblies 31. Those skilled in the art can select a suitable configuration based on the total number of magnetic steel units 3.

[0248] Example 13

[0249] This embodiment provides a rotor of an axial magnetic field motor and an axial magnetic field motor. The rotor of the axial magnetic field motor differs from that of the twelfth embodiment in the arrangement of the constraint mechanism 5 and the arrangement of the magnetic steel unit 3, as follows:

[0250] As shown in Figure 42, in this embodiment, the rotor of the axial magnetic field motor includes a rotor support 1, multiple magnetic steel units 3, a retaining ring 2, and a restraining mechanism 5. As shown in Figures 43 and 44, the rotor support 1 has a circular profile and is provided with multiple mounting slots 11 along its circumference. Optionally, the multiple mounting slots 11 are evenly distributed along the circumference of the rotor support 1. The mounting slots 11 include a first slot body 111 and a second slot body 112. The first slot body 111 and the second slot body 112 are arranged radially along the rotor support 1, with the first slot body 111 radially inward of the second slot body 112. As shown in Figures 42 and 45, the magnetic steel units 3 include an inner ring magnetic steel assembly 31 and an outer ring magnetic steel assembly 32 arranged radially along the rotor support 1. The inner ring magnetic steel assembly 31 is mounted within the first slot body 111, and the outer ring magnetic steel assembly 32 is mounted within the second slot body 112. As shown in Figure 42, the retaining ring 2 is disposed around the rotor support 1 and radially constrains the outer ring magnetic steel assembly 32.

[0251] As shown in Figures 43, 45-47, the restraining mechanism 5 includes a connecting assembly 51, multiple inner ring sleeves 52, and multiple outer ring sleeves 53. The connecting assembly 51 is connected to the rotor support 1. The inner ring sleeves 52 are tensioned, with the connecting assembly 51 sleeved on the first end and at least one inner ring magnetic steel assembly 31 sleeved on the second end, thereby radially restraining the inner ring magnetic steel assembly 31 sleeved thereon. The outer ring sleeve 53 is tensioned, with the connecting assembly 51 sleeved on the first end and at least one outer ring magnetic steel assembly 32 sleeved on the second end, thereby radially restraining the outer ring magnetic steel assembly 32 sleeved thereon.

[0252] In this embodiment, the inner ring sleeve 52 radially constrains the inner ring magnetic steel assembly 31 and overcomes the centrifugal force of the inner ring magnetic steel assembly 31 when it rotates. The fixed ring 2 and the outer ring sleeve 53 both radially constrain the outer ring magnetic steel assembly 32 and overcome the centrifugal force of the outer ring magnetic steel assembly 32 when it rotates. That is, the above-mentioned rotor radially segments the magnetic steel unit 3 and uses the inner ring sleeve 52 and the outer ring sleeve 53 to share the centrifugal force of multiple segments of magnetic steel. Therefore, when the rotor speed increases and the centrifugal force of the magnetic steel unit 3 increases, the magnetic steel unit 3 can also be effectively constrained, thereby enabling the motor equipped with the rotor to output a higher speed while ensuring a firm structure.

[0253] The N and N poles of two circumferentially adjacent magnetic steel units 3 are opposite. The number of magnetic steel units 3 is an even number, and every two adjacent magnetic steel units 3 form a pole pair. In this embodiment, both the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32 are constructed as fan-shaped ring structures. The inner ring sheath 52 is at least partially covered by the circumference of the inner ring magnetic steel assembly 31. The outer ring sheath 53 is at least partially covered by the circumference of the outer ring magnetic steel assembly 32.

[0254] In this embodiment, the structure of the connecting assembly 51 and the connection method with the rotor bracket 1 are the same as those in the twelfth embodiment, and are not described again here.

[0255] As shown in Figures 43 and 45 , the number of magnetic steel units 3, pillars 511, inner ring sleeves 52, and outer ring sleeves 53 are all the same. Each inner ring sleeve 52 is fitted with a pillar 511 and an inner ring magnetic steel assembly 31, and each outer ring sleeve 53 is fitted with a pillar 511 and an outer ring magnetic steel assembly 32. This arrangement ensures a more consistent restraining force across multiple magnetic steel units 3. In other embodiments, if one inner ring sleeve 52 is fitted with two inner ring magnetic steel assemblies 31, then the outer ring sleeve 53 is also fitted with two outer ring magnetic steel assemblies 32.

[0256] As shown in Figures 45 and 48, the rotor support 1 is provided with a plurality of first accommodating grooves 131. Each inner ring sleeve 52 is disposed within a corresponding first accommodating groove 131 and is fitted with a corresponding upright post 511 and inner ring magnetic steel assembly 31. The rotor support 1 is provided with a plurality of second accommodating grooves 132. Each outer ring sleeve 53 is disposed within a corresponding second accommodating groove 132 and is fitted with a corresponding upright post 511 and outer ring magnetic steel assembly 32. The arrangement of the first accommodating grooves 131 and the second accommodating grooves 132 ensures the stable position of the inner ring sleeve 52 and the outer ring sleeve 53, thereby ensuring reliable restraint of the inner ring magnetic steel assembly 31 and the outer ring magnetic steel assembly 32.

[0257] As shown in Figures 44-48, the rotor support 1 includes two support monomers 13, which are arranged axially and symmetrically. That is, the two support monomers 13 are fastened together to form the rotor support 1. The two support monomers 13 are each provided with a first half-slot on the side facing each other. The two first half-slots are connected to form a first receiving groove 131. The two support monomers 13 are each provided with a second half-slot on the side facing each other. The two second half-slots are connected to form a second receiving groove 132. In other words, by configuring the rotor support 1 as two support monomers 13, not only can the processing of the first receiving groove 131 and the second receiving groove 132 be facilitated, but also the installation of the inner ring sheath 52 and the inner ring magnetic steel assembly 31 can be facilitated.

[0258] Optionally, as shown in Figures 45 and 47 , a portion of the outer sheath 53 is positioned outside the inner sheath 52. Therefore, the trajectory of the first accommodating groove 131 and the trajectory of the second accommodating groove 132 partially overlap. As shown in Figure 16 , the first half groove and the second half groove of the stent unit 13 are partially connected, allowing them to be processed together, reducing the difficulty of processing the stent unit 13.

[0259] Optionally, as shown in Figures 44 and 49 , one of the radially parallel sidewalls of the first slot 111 and the inner ring magnetic steel assembly 31 is provided with a first groove 312, while the other is provided with a first protrusion 15. The first groove 312 engages with the first protrusion 15. The engagement of the first groove 312 and the first protrusion 15 allows the rotor support 1 to axially limit the inner ring magnetic steel assembly 31, resulting in a simple structure, reliable restraint, and improved structural robustness of the entire rotor. In this embodiment, the inner ring magnetic steel assembly 31 is provided with the first protrusion 15, and the first groove 312 is provided on the sidewall of the first slot 111.

[0260] As shown in Figures 47 and 49, one of the radially parallel sidewalls of the second slot 112 and the outer ring magnetic assembly 32 is provided with a second groove 322, and the other is provided with a second protrusion 16. The second protrusion 16 engages with the second groove 322. The engagement of the second groove 322 and the second protrusion 16 enables the rotor support 1 to axially limit the outer ring magnetic assembly 32, resulting in a simple structure and reliable restraint, further enhancing the structural strength of the entire rotor. In this embodiment, the outer ring magnetic assembly 32 is provided with a second groove 322, and the sidewall of the second slot 112 is provided with a second protrusion 16.

[0261] Optionally, as shown in Figures 47 and 48, a limiting portion 12 is formed between the first slot body 111 and the second slot body 112. The limiting portion 12 radially limits the corresponding inner ring magnetic steel assembly 31, and the rotor support 1 also forms a radial constraint on the inner ring magnetic steel assembly 31. In this embodiment, the inner ring sleeve 52 and the rotor support 1 jointly bear the centrifugal force of the inner ring magnetic steel assembly 31, while the outer ring sleeve 53 and the retaining ring 2 jointly bear the centrifugal force of the outer ring magnetic steel assembly 32. This greatly enhances the restraining force on the magnetic steel unit 3, ensuring that the magnetic steel unit 3 can still be reliably restrained even when the rotor rotates at high speed, allowing the motor equipped with this rotor to adapt to high-speed applications of axial magnetic field motors.

[0262] In this embodiment, as shown in Figures 44 and 48 , the first trough body 111 and the second trough body 112 are connected, and the second protrusion 16 provided on the sidewall of the second trough body 112, facing the end surface of the first trough body 111, constitutes the stopper 12. In some embodiments (not shown), the outer circumference of the first trough body 111 is larger than the inner circumference of the second trough body 112, thereby forming the stopper 12. In other embodiments, the first trough body 111 and the second trough body 112 may be disconnected, and the physical structure between the first trough body 111 and the second trough body 112 constitutes the stopper 12.

[0263] The assembly steps of the rotor of this embodiment are as follows: process two bracket monomers 13; then, as shown in Figure 45, set multiple first pressure plates 512 on one side of the first bracket monomer 13, and make multiple columns 511 pass through multiple avoidance holes 19 on the bracket monomer 13; then, as shown in Figure 45, install multiple inner ring sleeves 52, multiple inner ring magnetic steel assemblies 31, multiple outer ring sleeves 53 and multiple outer ring magnetic steel assemblies 32 into the corresponding first half slot, first slot body 111, second half slot and second slot body 112 respectively, at this time, the inner ring sleeve 52 is sleeved with the corresponding inner ring magnetic steel assembly 31, and the outer ring sleeve 53 is sleeved with the corresponding outer ring magnetic steel assembly 32; then, the second bracket monomer 13 is buckled with the first bracket monomer 13, and multiple columns 511 are correspondingly penetrated through the avoidance holes 19 on the second bracket monomer 13; then, the second pressure plate 513 is plugged into and matched with the multiple columns 511; and a fixing ring 2 is formed on the outer periphery of the bracket monomer 13.

[0264] The rotor of the axial magnetic field motor of the present application comprises each magnetic steel unit as an inner ring magnetic steel assembly arranged radially with an outer ring magnetic steel assembly. The restraining mechanism radially restrains the inner ring magnetic steel and overcomes the centrifugal force of the inner ring magnetic steel during rotation. The retaining ring radially restrains the outer ring magnetic steel assembly and overcomes the centrifugal force of the outer ring magnetic steel assembly during rotation. Specifically, by radially segmenting the magnetic steel units and providing an additional restraining mechanism to absorb the centrifugal force of the inner ring magnetic steel, the rotor can restrain the outer ring magnetic steel assembly rotating at a higher speed, provided that the restraining force of the retaining ring is constant. The entire rotor can effectively restrain the magnetic steel units rotating at a higher speed, thus adapting to the high-speed application of the axial magnetic field motor.

Claims

1. A rotor of an axial magnetic field motor, comprising a rotor support (1), a fixing ring (2) and a plurality of magnetic steel units (3), wherein the rotor support (1) is provided with a plurality of mounting grooves (11) along a circumferential direction, each of the magnetic steel units (3) is correspondingly mounted in one of the mounting grooves (11), and the fixing ring (2) is arranged around the rotor support (1) and radially limits the magnetic steel units (3); Along the radial direction of the rotor support (1), the magnetic steel unit (3) includes an inner ring magnetic steel component (31) and an outer ring magnetic steel component (32), and a plurality of limiting portions (12) are formed on the rotor support (1), each limiting portion (12) limiting one of the inner ring magnetic steel components (31) along the radial direction.

2. The rotor of the axial magnetic field motor according to claim 1, wherein: The mounting groove (11) includes a first groove body (111) and a second groove body (112) arranged radially from the inside to the outside, the rotor bracket (1) forms the limiting portion (12) between the first groove body (111) and the second groove body (112), and at least a portion of the outer peripheral surface of the inner ring magnetic steel assembly (31) abuts against the limiting portion (12).

3. The rotor of the axial magnetic field motor according to claim 2, wherein: The rotor support (1) comprises two support monomers (13) arranged along the axial direction, and the two support monomers (13) are symmetrically arranged.

4. The rotor of the axial magnetic field motor according to claim 3, wherein: The two bracket monomers (13) are bonded and connected.

5. The rotor of the axial magnetic field motor according to any one of claims 2 to 4, wherein: The first groove body (111) and the second groove body (112) are connected, and the size of the outer circumference of the first groove body (111) is larger than the size of the inner circumference of the second groove body (112) to form the limiting portion (12).

6. The rotor of the axial magnetic field motor according to any one of claims 2 to 4, wherein: The first slot body (111) and the second slot body (112) are not connected, and each of the limiting portions (12) has the same circumferential extension trajectory as the corresponding inner ring magnetic steel assembly (31).

7. The rotor of the axial magnetic field motor according to any one of claims 2 to 4, wherein: A reinforcing rib (14) is formed on the rotor bracket (1), and the reinforcing rib (14) is arranged around the outer periphery of the plurality of outer ring magnetic steel assemblies (32).

8. The rotor of the axial magnetic field motor according to any one of claims 2 to 4, wherein: Set to at least one of the following: One of the radially parallel side walls of the first slot body (111) and the side wall of the inner ring magnetic steel assembly (31) is provided with a first protrusion (15), and the other is provided with a first groove (312), and the first protrusion (15) is engaged with the first groove (312); or One of the radial side walls of the second slot body (112) and the side wall of the outer ring magnetic steel assembly (32) is provided with a second protrusion (16), and the other is provided with a second groove (322), and the second protrusion (16) is snap-fitted with the second groove (322).

9. The rotor of the axial magnetic field motor according to any one of claims 2 to 4, wherein: Set to at least one of the following: The inner ring magnetic steel assembly (31) is divided into two inner sub-segments (311) along the axial direction; or The outer ring magnetic steel assembly (32) is divided into two outer sub-segments (321) along the axial direction.

10. A rotor for an axial magnetic field motor, comprising: A rotor bracket (1), wherein the rotor bracket (1) is provided with a plurality of mounting grooves (11) along the circumferential direction; a magnetic disk assembly made of a magnetic conductive material and connected to the rotor bracket (1); the magnetic disk assembly comprising a plurality of filling portions, each of the filling portions filling a portion of the space of the corresponding mounting slot (11); A plurality of magnetic steel units (3) are correspondingly installed in a plurality of the installation slots (11), and each of the magnetic steel units (3) fills the remaining space of the corresponding installation slot (11).

11. The rotor of the axial flux motor according to claim 10, wherein: Along the radial direction of the rotor bracket (1), the mounting slot (11) includes a first slot body (111) and a second slot body (112); the magnetic steel unit (3) includes an inner ring magnetic steel component (31) accommodated in the first slot body (111) and an outer ring magnetic steel component (32) accommodated in the second slot body (112); a plurality of limiting portions (12) are formed on the rotor bracket (1), and each limiting portion (12) limits one of the inner ring magnetic steel components (31) in the radial direction.

12. The rotor of the axial flux motor according to claim 11, wherein: The guide disk assembly includes at least one of an inner ring guide disk (41) or an outer ring guide disk (42): The inner ring conductive disk (41) includes a plurality of inner ring filling portions (411), each inner ring filling portion (411) corresponding to a portion of the first slot (111), the inner ring magnetic steel assembly (31) fills the remaining space of the first slot (111), and the outer ring magnetic steel assembly (32) is installed in the second slot (112); The outer ring conductive disk (42) includes a plurality of outer ring filling portions (421), each of the outer ring filling portions (421) corresponding to a filling portion of the second slot (112), the outer ring magnetic steel assembly (32) filling the remaining space of the second slot (112), and the inner ring magnetic steel assembly (31) installed in the first slot (111).

13. The rotor of the axial flux motor according to claim 12, wherein: Set to at least one of the following: The inner ring guide disk (41) further comprises a plurality of inner ring connecting portions (412) respectively connected to the rotor support (1), wherein the inner ring connecting portion (412) connects two adjacent inner ring filling portions (411); or The two adjacent inner ring filling portions (411) are respectively located at two ends of the rotor bracket (1) along the axial direction, so that the two adjacent inner ring magnetic steel assemblies (31) are respectively located at two ends of the rotor bracket (1) along the axial direction.

14. The rotor of the axial flux motor according to claim 12, wherein: The second slot body (112) is parallel to the radial side wall and one of the side walls of the outer ring magnetic steel assembly (32) is provided with a third protrusion (17), and the other is provided with a first groove (321), and the third protrusion (17) is snap-fitted with the first groove (321).

15. The rotor of the axial flux motor according to claim 12, wherein: Set to at least one of the following: The outer ring guide disk (42) further includes a plurality of outer ring connecting portions (422) respectively connected to the rotor bracket (1), and the outer ring connecting portion (422) connects two adjacent outer ring filling portions (421); or The two adjacent outer ring filling portions (421) are respectively located at two ends of the rotor bracket (1) along the axial direction, so that the two adjacent outer ring magnetic steel components (32) are respectively located at two ends of the rotor bracket (1) along the axial direction.

16. The rotor of the axial flux motor according to claim 12, wherein: A fourth protrusion (18) is provided on one of the radial side walls of the first slot body (111) and the side wall of the inner ring magnetic steel assembly (31), and a second groove (312) is provided on the other side, and the fourth protrusion (18) is snap-fitted with the second groove (312).

17. The rotor of the axial flux motor according to claim 16, wherein: The inner ring magnetic steel assembly (31) comprises two inner sub-segments (311) arranged axially along the rotor support (1).

18. An axial magnetic field motor, comprising a stator and the rotor of the axial magnetic field motor according to any one of claims 10 to 17.

19. A method for manufacturing a rotor of an axial magnetic field motor, for manufacturing the rotor of the axial magnetic field motor according to claim 13, the method comprising: Processing the inner ring guide disk (41); The inner ring guide disk (41) is molded as an insert and integrally formed with the rotor bracket (1); Installing a plurality of unmagnetized inner ring magnetic steel assemblies (31) into a plurality of first slots (111) correspondingly; Magnetizing the plurality of inner ring magnetic steel components (31) as a whole; The plurality of magnetized outer ring magnetic steel assemblies (32) are correspondingly installed in the plurality of second slots (112).

20. A method for manufacturing a rotor of an axial magnetic field motor, for manufacturing the rotor of the axial magnetic field motor according to claim 15, the method comprising: Processing the outer ring guide disk (42); The outer ring guide disk (42) is molded as an insert and integrally formed with the rotor bracket (1); Installing a plurality of unmagnetized outer ring magnetic steel assemblies (32) into a plurality of second slots (112) correspondingly; Magnetizing the plurality of outer ring magnetic steel components (32) as a whole; The plurality of inner ring magnetic steel assemblies (31) are correspondingly installed in the plurality of first slots (111).

21. The method for manufacturing the rotor of the axial magnetic field motor according to claim 20, further comprising: before magnetizing the outer ring magnetic steel assembly (32) as a whole; A tightening band is wound around the outer periphery of the rotor support (1) to form a fixing ring (2) that radially stops the magnetic steel unit (3) by die-casting.

22. A rotor of an axial magnetic field motor, comprising a rotor support (1), a plurality of magnetic steel units (3) and a fixing ring (2), wherein the plurality of magnetic steel units (3) are arranged at intervals along the circumferential direction and supported on the rotor support (1), and the fixing ring (2) is arranged around the outer circumference of the rotor support (1) and radially constrains the magnetic steel units (3); The magnetic steel unit (3) comprises an inner ring magnetic steel component (31) and an outer ring magnetic steel component (32) arranged in a radial direction, wherein the inner ring magnetic steel component (31) is divided into at least one inner sub-segment (311) in the axial direction, and the outer ring magnetic steel component (32) is divided into at least one outer sub-segment (321) in the axial direction, and at least one of the inner sub-segment (311) and the outer sub-segment (321) in the same magnetic steel unit (3) is a magnetic steel, and the rest are magnetic conductors.

23. The rotor of the axial flux motor according to claim 22, wherein: Set to at least one of the following: The inner ring magnetic steel assembly (31) is divided into at least two inner sub-segments (311) along the axial direction, and one of the two inner sub-segments (311) adjacent to each other along the circumferential direction is a magnetic steel and the other is a magnetic conductor; or The outer ring magnetic steel assembly (32) is divided into at least two outer sub-segments (321) along the axial direction, and one of the two outer sub-segments (321) adjacent to each other along the circumferential direction is a magnetic steel, and the other is a magnetic conductor.

24. The rotor of the axial flux motor according to claim 23, wherein: Set to at least one of the following: On the same side of the rotor support (1), one of the two inner sub-segments (311) adjacent to each other in the circumferential direction is made of magnetic steel, and the other is made of a magnetic conductor; or On the same side of the rotor support (1), one of the two outer sub-segments (321) adjacent to each other in the circumferential direction is made of magnetic steel, and the other is made of a magnetic conductor.

25. The rotor of the axial flux motor according to claim 23, wherein: The fixing ring (2) is solidified and formed by multiple layers of carbon fibers wound around the rotor support (1) before the outer sub-segment (321) and the inner sub-segment (311) made of magnetic steel are magnetized.

26. The rotor of the axial flux motor according to claim 22, wherein: In the same magnetic steel unit (3), the volume of the magnetic steel accounts for 50% of the volume of the magnetic steel unit (3).

27. The rotor of the axial magnetic field motor according to any one of claims 22 to 26, wherein: The rotor bracket (1) is provided with a plurality of mounting grooves (11) arranged along the circumferential direction, and each of the magnetic steel units (3) is correspondingly mounted in one of the mounting grooves (11). The rotor bracket (1) is formed with a plurality of limiting portions (12), and each of the limiting portions (12) radially limits one of the inner ring magnetic steel components (31).

28. The rotor of the axial flux motor according to claim 27, wherein: The mounting groove (11) includes a first groove body (111) and a second groove body (112) arranged radially from the inside to the outside, the rotor bracket (1) forms the limiting portion (12) between the first groove body (111) and the second groove body (112), and at least a portion of the outer peripheral surface of the inner ring magnetic steel assembly (31) abuts against the limiting portion (12).

29. A method for manufacturing a rotor of an axial magnetic field motor, for manufacturing the rotor of the axial magnetic field motor according to any one of claims 22 to 28, the method comprising: Each of the inner ring magnetic steel components (31) is configured to include two inner sub-segments (311), one of the two inner sub-segments (311) is a magnetic steel and the other is a magnetic conductor; each of the outer ring magnetic steel components (32) is configured to include two outer sub-segments (321), one of the two outer sub-segments (321) is a magnetic steel and the other is a magnetic conductor; Mounting a plurality of outer ring magnetic steel assemblies (32) on a rotor support (1), and ensuring that on the same side of the rotor support (1), one of two circumferentially adjacent outer sub-segments (321) is a magnetic steel and the other is a magnetic conductor; Mounting a plurality of the inner ring magnetic steel assemblies (31) on the rotor support (1), and ensuring that on the same side of the rotor support (1), one of the two inner sub-segments (311) adjacent to each other in the circumferential direction is a magnetic steel and the other is a magnetic conductor; Magnetizing the magnetic steels in the plurality of inner ring magnetic steel assemblies (31) and / or the magnetic steels in the plurality of outer ring magnetic steel assemblies (32) as a whole; A fixing ring (2) is formed on the outer periphery of the rotor support (1) to radially constrain the plurality of outer ring magnetic steel assemblies (32).

30. The method for manufacturing a rotor of an axial magnetic field motor according to claim 29, further comprising, before integrally magnetizing the magnetic steels in the plurality of outer ring magnetic steel assemblies (32) and the magnetic steels in the inner ring magnetic steel assembly (31): Carbon fibers are wound around the outer circumference of the rotor support (1) to form the fixing ring (2) by compression molding.

31. An axial magnetic field motor comprising a stator and the rotor according to any one of claims 22 to 27.

32. A rotor for an axial magnetic field motor, comprising: A rotor bracket (1) is provided with a plurality of mounting grooves (11) along a circumferential direction, wherein the mounting grooves (11) include a first groove body (111) and a second groove body (112); A plurality of magnetic steel units (3) are provided along the radial direction of the rotor support (1), wherein the magnetic steel units (3) include an inner ring magnetic steel assembly (31) installed in the first slot body (111) and an outer ring magnetic steel assembly (32) installed in the second slot body (112); A fixing ring (2) is arranged on the rotor support (1) and radially limits the outer ring magnetic steel assembly (32); The restraint mechanism (5) comprises a connecting assembly (51) and a plurality of inner ring sleeves (52), wherein the connecting assembly (51) is connected to the inner ring sleeve The rotor bracket (1) is connected, the inner ring sleeve (52) is tensioned and the first end of the inner ring sleeve (52) is sleeved with the connecting component (51), and the second end is sleeved with at least one of the inner ring magnetic steel components (31) to radially constrain the inner ring magnetic steel component (31).

33. The rotor of the axial flux motor according to claim 32, wherein: The connecting assembly (51) comprises a plurality of columns (511), wherein the columns (511) penetrate the rotor support (1) along the axial direction of the rotor support (1); A plurality of first accommodating grooves (131) are provided in the rotor support (1), and each inner ring sleeve (52) is arranged in one of the first accommodating grooves (131) and sleeved with the corresponding column (511).

34. The rotor of the axial flux motor according to claim 33, wherein: The rotor support (1) comprises two support monomers (13) arranged symmetrically along the axial direction, and the two support monomers (13) are respectively provided with a first half groove on one side facing each other, and the two first half grooves are butted together to form the first accommodating groove (131).

35. The rotor of the axial flux motor according to claim 33, wherein: The first accommodating groove (131) is arranged around the first groove body (111) and is in communication with the first groove body (111).

36. The rotor of the axial flux motor according to claim 33, wherein: The connecting assembly (51) further comprises a first pressing plate (512) and a second pressing plate (513) respectively arranged on both sides of the rotor bracket (1); the column (511) is arranged on the first pressing plate (512) and is detachably connected to the second pressing plate (513).

37. The rotor of an axial magnetic field motor according to any one of claims 32 to 36, wherein: The restraining mechanism (5) further includes a plurality of outer ring sleeves (53), wherein the outer ring sleeves (53) are tensioned and the first end of the outer ring sleeve (53) is sleeved with the connecting assembly (51), and the second end is sleeved with at least one outer ring magnetic steel assembly (32) to radially restrain the outer ring magnetic steel assembly (32).

38. The rotor of an axial flux electric machine according to claim 37, wherein: Part of the outer ring sheath (53) is arranged outside the inner ring sheath (52).

39. The rotor of the axial flux motor according to claim 37, wherein: The connecting assembly (51) comprises a plurality of columns (511), wherein the columns (511) penetrate the rotor support (1) along the axial direction of the rotor support (1); A plurality of second accommodating grooves (132) are provided in the rotor support (1), and each outer ring sleeve (53) is arranged in one of the second accommodating grooves (132) and sleeved with the corresponding column (511).

40. The rotor of the axial magnetic field motor according to any one of claims 32 to 36, wherein: A limiting portion (12) is formed between the first slot body (111) and the second slot body (112), and the limiting portion (12) limits the corresponding inner ring magnetic steel assembly (31) in the radial direction.

41. The rotor of an axial magnetic field motor according to any one of claims 32 to 36, wherein: Set to at least one of the following: One of the first slot body (111) and the inner ring magnetic steel assembly (31) is provided with a first groove (312) parallel to the radial side wall, and the other is provided with a first protrusion (15), and the first groove (312) is engaged with the first protrusion (15); or The second slot body (112) is parallel to the radial side wall and one of the outer ring magnetic steel components (32) is provided with a second groove (322), and the other is provided with a second protrusion (16), and the second protrusion (16) is snap-fitted with the second groove (322).

42. An axial magnetic field motor comprising a stator and the rotor according to any one of claims 32 to 41.

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