Axial end face motor capable of resisting magnetic pulling force and preventing deformation

Abstract

The utility model relates to a wheel hub motor, in particular to an axial end face motor capable of resisting magnetic pulling force and preventing deformation, and solves the technical problem that a rotor structure of a conventional axial magnetic flux motor cannot resist the attraction force of a rotor permanent magnet to stator teeth, so that the rotor structure is deformed. The axial end face motor capable of resisting magnetic pulling force and preventing deformation comprises a motor shaft, a rotor assembly, a stator assembly and a magnetic suspension assembly. The magnetic suspension assembly comprises two magnetic ring seats, 2K movable magnetic rings, 2K static magnetic rings and a plurality of adjusting bolts, wherein K is greater than or equal to 1; the two magnetic ring seats are respectively arranged in the first rotor magnetic ring groove and the second rotor magnetic ring groove through adjusting bolts, and the adjusting lengths of the two magnetic ring seats along the axial direction are equal; 2K moving magnetic rings are equally divided into two groups and are respectively adsorbed on the end surfaces, facing the stator, of the two magnetic ring seats; 2K static magnetic rings are equally divided into two groups and are respectively arranged in the first stator magnetic ring groove and the second stator magnetic ring groove, and the magnetic poles of the opposite end surfaces of the static magnetic rings and the movable magnetic rings are the same to form an axial suspension state.

Description

Technical Field

[0001] This utility model relates to a hub motor, specifically an axial end face motor that is resistant to magnetic tension and deformation. Background Technology

[0002] The stator and rotor structures of axial flux motors are mostly made of carbon fiber or high-strength steel and high-strength aluminum to prevent deformation caused by the attraction of the rotor permanent magnets to the stator teeth. This results in higher motor costs, heavier weight, and lower power density. In particular, disc-type axial flux motors with larger radial dimensions can only use carbon fiber for the stator and rotor structures. Although this can prevent deformation due to attraction, their price is generally tens of thousands of yuan per unit, making them very expensive.

[0003] While existing stator windings without iron cores have solved the problem of force deformation in axial flux motors, the magnetic field strength of these windings is low, and the power density is limited. The magnetic field needs to be closed through the air, resulting in extremely high magnetic reluctance and significantly reducing the effective air gap magnetic flux density to only 1 / 5 to 1 / 3 of that of iron core motors. To achieve the same torque, coreless stator windings require a significant increase in winding current or number of turns, leading to a surge in copper losses. High copper losses result in low efficiency, and if the magnetic field is weakened, even higher current compensation is required. Especially in continuous operation or high-load scenarios, the heat generation problem becomes prominent.

[0004] Axial flux motors offer numerous advantages over radial flux motors, yet their market application is limited. The primary reason is that when an axial flux motor is not in operation, the magnetic fields of the stator core and rotor permanent magnets create an axial attraction between the permanent magnets and the core on two planes along the axis. If the rotor's resistance to bending deformation is less than this axial attraction, the permanent magnets will adhere to the stator core, rendering the motor inoperable. Conversely, if the rotor's resistance to bending deformation exceeds the axial attraction, the cost becomes high material costs or significant weight, negating its advantages over radial flux motors. Therefore, there is an urgent need to develop a low-cost, high-efficiency axial motor that can resist the attraction of the rotor permanent magnets to the stator teeth, preventing rotor deformation without altering the original air gap size. Utility Model Content

[0005] The purpose of this invention is to solve the technical problem that the rotor structure of existing axial flux motors cannot resist the attraction of the rotor permanent magnet to the stator teeth, which causes rotor structure deformation. In response, this invention provides an axial end face motor that is resistant to magnetic tension and deformation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An axial end face motor resistant to magnetic tension and deformation is characterized by comprising a motor shaft, a rotor assembly rotatably sleeved on the motor shaft, a stator assembly fixedly sleeved on the motor shaft, and a magnetic levitation assembly.

[0008] The rotor assembly includes a first rotor disk, a rotor connecting ring, a second rotor disk, and 4Y magnets connected sequentially along the axial direction, where Y≥1. A mounting cavity is formed between the first rotor disk, the rotor connecting ring, and the second rotor disk. A first rotor magnetic ring groove is provided on the inner end face of the first rotor disk facing the stator assembly, close to the motor shaft. A second rotor magnetic ring groove is provided on the inner end face of the second rotor disk facing the stator assembly at a position corresponding to the first rotor magnetic ring groove. The N and S poles of Y / 2 magnets are evenly staggered circumferentially on the inner end face of the first rotor disk and located outside the first rotor magnetic ring groove. Similarly, the N and S poles of Y / 2 magnets are evenly staggered circumferentially on the inner end face of the second rotor disk and located outside the second rotor magnetic ring groove, corresponding to the radial positions of the Y / 2 magnets on the first rotor disk. The magnetic poles of the magnets in the first rotor disk are opposite to those of the corresponding magnets in the second rotor disk, used to generate a first axial magnetic field. The outer end face of the first rotor disk is used for power output.

[0009] The stator assembly is located in the mounting cavity and includes a stator disk and 3X iron core windings, where X≥1; a first stator magnetic ring slot is provided on one side wall of the stator disk at a position corresponding to the first rotor magnetic ring slot, and a second stator magnetic ring slot is provided on the other side wall at a position corresponding to the second rotor magnetic ring slot; the X iron core windings are evenly distributed circumferentially along the outer wall of the stator disk, and the circumference of the iron core windings corresponds to the radial position of Y magnets; when the iron core windings are energized, they generate a second axial magnetic field, which interacts with the first axial magnetic field to generate radial torque;

[0010] The magnetic levitation assembly includes two magnetic ring seats, 2K moving magnetic rings, 2K stationary magnetic rings, and multiple adjusting bolts, where K≥1. The two magnetic ring seats are respectively set in the first rotor magnetic ring slot and the second rotor magnetic ring slot via adjusting bolts, and their axial adjustment lengths are equal. The 2K moving magnetic rings are divided into two groups and are respectively adsorbed onto the end faces of the two magnetic ring seats facing the stator. The 2K stationary magnetic rings are also divided into two groups and are respectively set in the first stator magnetic ring slot and the second stator magnetic ring slot, and the magnetic poles of the opposite end faces of the stationary magnetic rings and the moving magnetic rings are the same, forming an axial levitation state.

[0011] Furthermore, the 2K moving magnetic rings are evenly divided into two groups along the radial direction and are respectively adsorbed onto the end faces of the two magnetic ring seats facing the stator; the 2K stationary magnetic rings are respectively arranged in the first stator magnetic ring slot and the second stator magnetic ring slot along the radial direction; or, the 2K moving magnetic rings are evenly divided into two groups along the axial direction and are respectively adsorbed onto the end faces of the two magnetic ring seats facing the stator; the 2K stationary magnetic rings are respectively arranged in the first stator magnetic ring slot and the second stator magnetic ring slot along the axial direction.

[0012] Furthermore, on the inner end faces of both the first and second rotor disks, a first annular wall and a second annular wall are sequentially arranged from the outside to the inside on the inner side of the Y / 2 magnets, and the heights of the first and second annular walls along the axial direction are equal; the first rotor magnetic ring groove is formed by the first annular wall, the second annular wall, and the inner end face of the first rotor disk located between the first and second annular walls; the second rotor magnetic ring groove is formed by the first annular wall, the second annular wall, and the inner end face of the second rotor disk located between the first and second annular walls; both the first and second rotor magnetic ring grooves are provided with screw holes; one end of the adjusting bolt is connected to the screw hole, and the other end is connected to the corresponding magnetic ring seat, thereby adjusting the axial position of the magnetic ring seat in the first or second rotor magnetic ring groove through the thread.

[0013] Furthermore, the inner end face of the first rotor disk is uniformly provided with Y / 2 first magnet slots adapted to the magnets along the circumference; the inner end face of the second rotor disk is uniformly provided with Y / 2 second magnet slots adapted to the magnets along the circumference; the radial cross-section of the magnet is a trapezoidal structure, and the small end of the magnet is located close to the motor shaft; the first magnet slots and the second magnet slots are trapezoidal slots adapted to the magnets, and the small end of the trapezoidal slots is located close to the motor shaft.

[0014] Furthermore, it also includes two roller bearings; the middle part of the first rotor disk and the second rotor disk are respectively provided with stepped holes; the inner wall of the small end of the stepped hole is clearance-fitted with the motor shaft, and the inner wall of the large end is fixedly connected to the outer ring of the two roller bearings respectively, and the inner ring of the two roller bearings is fixedly connected to the motor shaft respectively.

[0015] Furthermore, the stator disk includes a disk body and X radial protrusions; the X radial protrusions are evenly distributed along the outer wall of the disk body to form X grooves; X iron core windings are respectively disposed in the X grooves; the iron core windings include an iron core and a winding; the end faces of two adjacent iron cores are attached to each other along the axial direction; the windings are used to connect with an external driver.

[0016] Furthermore, a third ring wall and a fourth ring wall are sequentially arranged on one side wall of the disk body from the outside to the inside, and a fifth ring wall and a sixth ring wall are sequentially arranged on the other side wall from the outside to the inside, and the third ring wall, the fourth ring wall, the fifth ring wall and the sixth ring wall are of equal height along the axial direction; the first stator magnetic ring groove is formed by the third ring wall, the fourth ring wall and one side wall of the disk body located between the third ring wall and the fourth ring wall; the second stator magnetic ring groove is formed by the fifth ring wall, the sixth ring wall and the other side wall of the disk body located between the fifth ring wall and the sixth ring wall.

[0017] Furthermore, the iron core includes a first core plate, a second core plate, and a core body vertically connected between the first core plate and the second core plate, and the first core plate, the core body, and the second core plate are connected to form an I-shaped structure; the core body is used to be vertically arranged between adjacent radial protrusions, and the two sides of the middle part are respectively provided with matching limiting grooves at positions corresponding to the radial protrusions. The limiting grooves cooperate with the corresponding radial protrusions to lock the core body into the corresponding grooves; the windings are respectively arranged on the core body between the limiting groove and the first core plate, and between the limiting groove and the second core plate.

[0018] Furthermore, the device also includes a connector; the core is a cuboid structure with a through first mounting hole on its side along the width direction; the bottom of the groove has a second mounting hole; the connector passes through the first mounting hole and connects to the second mounting hole from the outside to the inside, thereby fixing the core onto the disc body.

[0019] Furthermore, reinforcing ribs are provided on the outer end faces of both the first rotor disk and the second rotor disk; the first rotor disk is integrally formed with the first ring wall and the second ring wall; the disk body is integrally formed with X radial protrusions, the third ring wall, the fourth ring wall, the fifth ring wall and the sixth ring wall; ceramic rings are respectively provided at the bottom of the first stator magnetic ring slot and the second stator magnetic ring slot for heat insulation to prevent the static magnetic ring from demagnetizing.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model relates to an axial end face motor that resists magnetic tension and deformation. A magnetic levitation component is installed in the first and second rotor magnetic ring slots, which reduces the weight of the axial end face motor and allows for flexible adjustment of the repulsive force between the first and second rotor disks and the stator disk. The smaller the distance between the stationary and moving magnetic rings, the greater the repulsive force. This solves the technical problems of existing axial flux motors, such as high cost, low efficiency, and rotor structure deformation caused by the inability of the rotor permanent magnet to resist the attraction of the rotor permanent magnet to the stator teeth.

[0022] 2. The axial end face motor with anti-magnetic tension and anti-deformation in this utility model has a static magnetic ring and a moving magnetic ring, both of which are single-pole magnetic rings and repel each other, forming an axial suspension state. Therefore, the repulsive force of the static magnetic ring and the moving magnetic ring applies a supporting force to the first rotor disk and the second rotor disk and the stator disk respectively, preventing the first rotor disk and the second rotor disk from bending and deforming, thereby ensuring the designed air gap size.

[0023] 3. The axial end face motor of this utility model with anti-magnetic tension and anti-deformation, when 2K moving magnetic rings and 2K stationary magnetic rings are arranged radially, can make the repulsive force evenly distributed between the first rotor disk, the second rotor disk and the stator disk when the radial dimension of the axial end face motor is too large; when 2K moving magnetic rings and 2K stationary magnetic rings are arranged axially, the repulsive force between the first rotor disk and the second rotor disk and the stator disk can be increased, ensuring that they do not deform.

[0024] 4. The anti-magnetic tensile and anti-deformation axial end face motor in this utility model can limit the position of the two magnetic ring seats along the axial and radial directions through the first rotor magnetic ring groove and the second rotor magnetic ring groove, and then control the axial distance between the stationary magnetic ring and the moving magnetic ring by adjusting the bolt, thereby ensuring the stability of the designed air gap size.

[0025] 5. The axial end face motor with anti-magnetic tension and anti-deformation in this utility model uses the first ring wall and the second ring wall to limit the moving magnetic ring in the radial direction, so as to prevent the moving magnetic ring from radially shifting when the repulsive forces of the stationary magnetic ring and the moving magnetic ring interact.

[0026] 6. The anti-magnetic tensile and anti-deformation axial end face motor of this utility model uses the third ring wall, the fourth ring wall, the fifth ring wall and the sixth ring wall to limit the static magnetic ring in the radial direction, so as to prevent the static magnetic ring from undergoing radial displacement when the repulsive forces of the static magnetic ring and the moving magnetic ring interact.

[0027] 7. The axial end face motor with anti-magnetic tension and anti-deformation in this utility model uses two roller bearings to maintain the perpendicularity of the first rotor disk and the second rotor disk to the motor shaft.

[0028] 8. The axial end face motor with anti-magnetic tension and anti-deformation in this utility model can reduce the deformation caused by the attraction between the magnetic field of the magnet and the iron core winding by means of reinforcing ribs.

[0029] 9. The axial end face motor with anti-magnetic tension and anti-deformation in this utility model has a first rotor disk integrally formed with the first ring wall and the second ring wall; the disk body is integrally formed with X radial protrusions, the third ring wall, the fourth ring wall, the fifth ring wall and the sixth ring wall, which makes it easier to process and more stable in structure.

[0030] 10. In the axial end face motor of this utility model with anti-magnetic tension and anti-deformation, ceramic rings are respectively provided at the bottom of the first stator magnetic ring slot and the second stator magnetic ring slot for heat insulation, to prevent the heat generated by the iron core winding from being directly transferred to the static magnetic ring, causing the static magnetic ring to demagnetize. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of an axial end face motor that resists magnetic tension and deformation according to this utility model;

[0032] Figure 2 This is an exploded view of an embodiment of an axial end face motor that resists magnetic tension and deformation according to this utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the first rotor disk in an embodiment of an axial end face motor that resists magnetic tension and deformation according to this utility model;

[0034] Figure 4 This is a schematic diagram of the stator disk structure in an embodiment of an axial end face motor that resists magnetic tension and deformation according to this utility model;

[0035] Figure 5 This is a schematic diagram of the assembly of the stator disk and the iron core in an embodiment of an axial end face motor that resists magnetic tension and deformation according to this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1-Motor shaft, 2-First rotor disk, 21-First rotor magnetic ring groove, 22-First ring wall, 23-Second ring wall, 24-First magnet groove, 25-Stepped hole, 26-Screw hole, 3-Rotor connecting ring, 4-Second rotor disk, 41-Second rotor magnetic ring groove, 42-Second magnet groove, 5-Magnet, 6-Stator disk, 61-First stator magnetic ring groove, 62-Second stator magnetic ring groove, 63-Disk body, 64-Radial protrusion, 65-Groove, 66-Third ring wall, 67-Fourth ring wall, 68-Fifth ring wall, 69-Sixth ring wall, 7-Iron core, 71-First core plate, 72-Second core plate, 73-Core body, 8-Magnetic ring seat, 9-Moving magnetic ring, 10-Stationary magnetic ring, 11-Adjusting bolt, 12-Roller bearing, 13-Connector, 14-Ceramic ring. Detailed Implementation

[0038] like Figure 1 , Figure 2 , Figure 3 As shown, an axial end-face motor resistant to magnetic tension and deformation includes a motor shaft 1, a rotor assembly rotatably sleeved on the motor shaft 1, a stator assembly fixedly sleeved on the motor shaft 1, a magnetic levitation assembly, two roller bearings 12, and a connector 13. The rotor assembly includes a first rotor disk 2, a rotor connecting ring 3, a second rotor disk 4, and 4Y magnets 5 connected sequentially along the axial direction, where Y≥1. A mounting cavity is formed between the first rotor disk 2, the rotor connecting ring 3, and the second rotor disk 4. Figure 3As shown, a first rotor magnetic ring groove 21 is provided on the inner end face of the first rotor disk 2 facing the stator assembly, close to the motor shaft 1. A second rotor magnetic ring groove 41 is provided on the inner end face of the second rotor disk 4 facing the stator assembly at a position corresponding to the first rotor magnetic ring groove 21. The N poles and S poles of Y / 2 magnets 5 are evenly staggered along the circumference on the inner end face of the first rotor disk 2 and located outside the first rotor magnetic ring groove 21. In addition, the N poles and S poles of Y / 2 magnets 5 are evenly staggered along the circumference on the inner end face of the second rotor disk 4 and located outside the second rotor magnetic ring groove 41, corresponding to the radial positions of the Y / 2 magnets 5 on the first rotor disk 2. The magnetic poles of the magnets 5 in the first rotor disk 2 are opposite to the magnetic poles of the corresponding magnets 5 in the second rotor disk 4, which is used to generate a first axial magnetic field. The outer end face of the first rotor disk 2 is used to output power.

[0039] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the stator assembly is located in the mounting cavity and includes a stator disk 6 and 3X iron core windings, where X ≥ 1. A first stator magnetic ring groove 61 is provided on one side wall of the stator disk 6 at a position corresponding to the first rotor magnetic ring groove 21, and a second stator magnetic ring groove 62 is provided on the other side wall at a position corresponding to the second rotor magnetic ring groove 41. The X iron core windings are evenly distributed circumferentially along the outer wall of the stator disk 6, and the circumference of the iron core windings corresponds to the radial position of Y magnets 5. When the iron core windings are energized, they generate a second axial magnetic field, which interacts with the first axial magnetic field to generate radial torque.

[0040] like Figure 2 As shown, the magnetic levitation assembly includes two magnetic ring seats 8, two moving magnetic rings 9, two stationary magnetic rings 10, and multiple adjusting bolts 11. The two magnetic ring seats 8 are respectively set in the first rotor magnetic ring groove 21 and the second rotor magnetic ring groove 41 by adjusting bolts 11, and their axial adjustment lengths are equal. The two moving magnetic rings 9 are divided into two groups and are respectively adsorbed on the end faces of the two magnetic ring seats 8 facing the stator. The two stationary magnetic rings 10 are divided into two groups and are respectively set in the first stator magnetic ring groove 61 and the second stator magnetic ring groove 62, and the magnetic poles of the end faces of the stationary magnetic rings 10 and the moving magnetic rings 9 are the same to form an axial levitation state. One end of the adjusting bolt 11 is connected to the bottom of the first rotor magnetic ring groove 21 or the bottom of the second rotor magnetic ring groove 41, and the other end is connected to the magnetic ring seat 8, which is used to adjust the axial levitation distance between the moving magnetic rings 9 and the stationary magnetic rings 10, thereby adjusting the magnitude of the repulsive force.

[0041] To better adjust the repulsive force, the two moving magnetic rings 9 are evenly divided into two groups radially and adsorbed onto the end faces of the two magnetic ring seats 8 facing the stator, respectively; the two stationary magnetic rings 10 are respectively arranged radially in the first stator magnetic ring groove 61 and the second stator magnetic ring groove 62; or, the two moving magnetic rings 9 are sequentially adsorbed axially onto the end faces of the two magnetic ring seats 8 facing the stator, and the two stationary magnetic rings 10 are sequentially arranged axially in the first stator magnetic ring groove 61 and the second stator magnetic ring groove 62. The axial adjustment lengths of the two magnetic ring seats 8 are equal. The repulsive force of the stationary magnetic rings 10 and the moving magnetic rings 9 applies a supporting force between the first rotor disk 2 and the second rotor disk 4 and the stator disk 6, respectively, preventing the first rotor disk 2 and the second rotor disk 4 from bending and deforming, thereby ensuring the designed air gap size. Ceramic rings 14 are respectively provided at the bottom of the first stator magnetic ring groove 61 and the second stator magnetic ring groove 62 to prevent the stationary magnetic rings 10 from being demagnetized.

[0042] In this embodiment, on the inner end faces of the first rotor disk 2 and the second rotor disk 4, a first annular wall 22 and a second annular wall 23 are sequentially arranged from the outside to the inside on the inner side of the Y / 2 magnets 5, and the heights of the first annular wall 22 and the second annular wall 23 are equal along the axial direction; the first rotor magnetic ring groove 21 is formed by the first annular wall 22, the second annular wall 23 and the inner end face of the first rotor disk 2 located between the first annular wall 22 and the second annular wall 23; the second rotor magnetic ring groove 41 is formed by the first annular wall 22, the second annular wall 23 and the inner end face of the second rotor disk 4 located between the first annular wall 22 and the second annular wall 23; both the first rotor magnetic ring groove 21 and the second rotor magnetic ring groove 41 are provided with screw holes 26; one end of the adjusting bolt 11 is connected to the screw hole 26, and the other end is connected to the corresponding magnetic ring seat 8, thereby adjusting the axial position of the magnetic ring seat 8 in the first rotor magnetic ring groove 21 or the second rotor magnetic ring groove 41 through the thread.

[0043] like Figure 3 As shown, the inner end face of the first rotor disk 2 is uniformly provided with Y / 2 first magnet slots 24 that are adapted to the magnets 5 along the circumference; the inner end face of the second rotor disk 4 is uniformly provided with Y / 2 second magnet slots 42 that are adapted to the magnets 5 along the circumference; the radial cross-section of the magnets 5 is a trapezoidal structure, and the small end of the magnets 5 is located close to the motor shaft 1; the first magnet slots 24 and the second magnet slots 42 are trapezoidal slots adapted to the magnets 5, and the small end of the trapezoidal slots is located close to the motor shaft 1.

[0044] The middle portions of the first rotor disk 2 and the second rotor disk 4 are respectively provided with stepped holes 25; the inner wall of the small end of the stepped hole 25 is clearance-fitted with the motor shaft 1, and the inner wall of the large end is fixedly connected to the outer rings of the two roller bearings 12 respectively, and the inner rings of the two roller bearings 12 are fixedly connected to the motor shaft 1 respectively.

[0045] like Figure 4 , Figure 5As shown, the stator disk 6 includes a disk body 63 and X radial protrusions 64; the X radial protrusions 64 are evenly distributed along the circumference of the outer wall of the disk body 63 to form X grooves 65; X iron core windings are respectively disposed in the X grooves 65; the iron core windings include iron cores 7 and windings; the end faces of two adjacent iron cores 7 are attached to each other along the axial direction; the windings are used to connect with an external driver. A third annular wall 66 and a fourth annular wall 67 are arranged sequentially from the outside to the inside on one side wall of the disk body 63, and a fifth annular wall 68 and a sixth annular wall 69 are arranged sequentially from the outside to the inside on the other side wall, and the third annular wall 66, the fourth annular wall 67, the fifth annular wall 68 and the sixth annular wall 69 have the same height along the axial direction. The first stator magnetic ring groove 61 is formed by the third ring wall 66, the fourth ring wall 67 and one side wall of the disk body 63 located between the third ring wall 66 and the fourth ring wall 67; the second stator magnetic ring groove 62 is formed by the fifth ring wall 68, the sixth ring wall 69 and the other side wall of the disk body 63 located between the fifth ring wall 68 and the sixth ring wall 69.

[0046] The core 7 includes a first core plate 71, a second core plate 72, and a core body 73 vertically connected between the first core plate 71 and the second core plate 72. The first core plate 71, the core body 73, and the second core plate 72 are connected in an I-shape. The core body 73 is vertically positioned between adjacent radial protrusions 64, and its two sides, corresponding to the radial protrusions 64, are respectively provided with matching limiting grooves. The limiting grooves cooperate with the corresponding radial protrusions 64 to lock the core body 73 into the corresponding grooves 65. The windings are respectively arranged on the core body 73 between the limiting groove and the first core plate 71, and between the limiting groove and the second core plate 72. The core body 73 has a cuboid structure, and a through first mounting hole is provided on its side along the width direction. A second mounting hole is provided at the bottom of the groove 65. The connector 13 passes through the first mounting hole and connects to the second mounting hole from the outside to the inside, fixing the core body 73 onto the disc body 63.

[0047] The outer end faces of the first rotor disk 2 and the second rotor disk 4 are provided with reinforcing ribs, which can reduce the deformation caused by the attraction between the magnetic field of the magnet 5 and the iron core winding from a structural point of view; the first rotor disk 2 is integrally formed with the first ring wall 22 and the second ring wall 23; the disk body 63 is integrally formed with X radial protrusions 64, the third ring wall 66, the fourth ring wall 67, the fifth ring wall 68 and the sixth ring wall 69.

[0048] This utility model discloses an axial end face motor with anti-magnetic pull and anti-deformation properties, which can solve the problem of rotor assembly deformation and stator assembly deformation caused by the mutual attraction between magnet 5 and iron core 7 in various axial motors. Since the moving magnetic ring 9 and the stationary magnetic ring 10 correspond to the same pole, they repel each other, which is used to resist the attraction between magnet 5 and iron core 7, thereby weakening the gravitational deformation of the first rotor disk 2, the second rotor disk 4 and the disk body 63. The adjusting bolt 11 can be adjusted according to the magnitude of the magnetic ring repulsion force between the first rotor disk 2 and the second rotor disk 4 and the disk body 63, thereby controlling the distance between the moving magnetic ring 9 and the stationary magnetic ring 10 to control the magnitude of the repulsion force. The number of magnetic ring sets can be increased according to the power and size of the axial motor.

Claims

1. A magnetic drag resistant, distortion proof axial face motor characterized by: The motor shaft (1), the rotor assembly rotatably sleeved on the motor shaft (1), the stator assembly fixedly sleeved on the motor shaft (1), and the magnetic suspension assembly are included. The rotor assembly includes, in sequence along the axial direction, a first rotor disc (2), a rotor connecting ring (3), a second rotor disc (4), and 4Y magnetic steels (5), Y≥1; the first rotor disc (2), the rotor connecting ring (3), and the second rotor disc (4) form an installation cavity; the first rotor disc (2) is provided with a first rotor magnetic ring groove (21) close to the motor shaft (1) on an inner end face thereof facing the stator assembly; the second rotor disc (4) is provided with a second rotor magnetic ring groove (41) on an inner end face thereof facing the stator assembly at a position corresponding to the first rotor magnetic ring groove (21); N poles and S poles of Y / 2 magnetic steels (5) are uniformly and alternately arranged on the inner end face of the first rotor disc (2) and located outside the first rotor magnetic ring groove (21) in the circumferential direction; N poles and S poles of the other Y / 2 magnetic steels (5) are uniformly and alternately arranged on the inner end face of the second rotor disc (4) and located outside the second rotor magnetic ring groove (41) in the circumferential direction, and correspond to the radial positions of the Y / 2 magnetic steels (5) on the first rotor disc (2); the magnetic poles of the magnetic steels (5) in the first rotor disc (2) are opposite to the magnetic poles of the magnetic steels (5) in the second rotor disc (4) corresponding thereto, for generating a first axial magnetic field; and the outer end face of the first rotor disc (2) is used for outputting power. The stator assembly is located in the installation cavity and includes a stator disc (6) and 3X core windings, X≥1; a first stator magnetic ring groove (61) is arranged on one side wall of the stator disc (6) at a position corresponding to the first rotor magnetic ring groove (21); a second stator magnetic ring groove (62) is arranged on the other side wall of the stator disc (6) at a position corresponding to the second rotor magnetic ring groove (41); the X core windings are uniformly distributed along the outer wall of the stator disc (6) in the circumferential direction, and the circumference where the core windings are located corresponds to the radial positions of the Y magnetic steels (5); the core windings generate a second axial magnetic field when energized, for interacting with the first axial magnetic field to generate a radial torque. The magnetic suspension assembly includes two magnetic ring seats (8), 2K dynamic magnetic rings (9), 2K static magnetic rings (10), and a plurality of adjusting bolts (11), K≥1; the two magnetic ring seats (8) are arranged in the first rotor magnetic ring groove (21) and the second rotor magnetic ring groove (41) by the adjusting bolts (11) and have equal axial adjustment lengths; the 2K dynamic magnetic rings (9) are evenly divided into two groups and are respectively adsorbed on the end faces of the two magnetic ring seats (8) facing the stator; the 2K static magnetic rings (10) are evenly divided into two groups and are respectively arranged in the first stator magnetic ring groove (61) and the second stator magnetic ring groove (62); and the end faces of the static magnetic rings (10) and the dynamic magnetic rings (9) opposite to each other have the same magnetic poles, forming an axial suspension state.

2. The axial end face motor against magnetic pulling force and deformation according to claim 1, characterized in that: 2K said moving magnetic rings (9) are evenly divided into two groups along the radial direction, and are respectively adsorbed on the end surface of the two magnetic ring seats (8) facing the stator; 2K said static magnetic rings (10) are arranged in the first stator magnetic ring groove (61) and the second stator magnetic ring groove (62) along the radial direction; Alternatively, 2K said moving magnetic rings (9) are adsorbed on the end surface of the magnetic ring seat (8) facing the stator along the axial direction; 2K said static magnetic rings (10) are arranged in the first stator magnetic ring groove (61) and the second stator magnetic ring groove (62) along the axial direction.

3. The axial end surface motor of claim 2, wherein: the inner end surface of the first rotor disc (2) and the second rotor disc (4) is provided with a first ring wall (22) and a second ring wall (23) from outside to inside on the inner side of Y / 2 magnetic steels (5), and the height of the first ring wall (22) and the second ring wall (23) along the axial direction is equal; the first rotor magnetic ring groove (21) is formed by the first ring wall (22), the second ring wall (23) and the inner end surface of the first rotor disc (2) between the first ring wall (22) and the second ring wall (23); the second rotor magnetic ring groove (41) is formed by the first ring wall (22), the second ring wall (23) and the inner end surface of the second rotor disc (4) between the first ring wall (22) and the second ring wall (23); the first rotor magnetic ring groove (21) and the second rotor magnetic ring groove (41) are provided with screw holes (26) inside; one end of the adjusting bolt (11) is connected with the screw hole (26), and the other end is connected with the corresponding magnetic ring seat (8), and the axial position of the magnetic ring seat (8) in the first rotor magnetic ring groove (21) or the second rotor magnetic ring groove (41) is adjusted through the thread.

4. The axial end surface motor of claim 3, wherein: the inner end surface of the first rotor disc (2) is uniformly provided with Y / 2 first magnetic steel grooves (24) matched with the magnetic steels (5) along the circumference; the inner end surface of the second rotor disc (4) is uniformly provided with Y / 2 second magnetic steel grooves (42) matched with the magnetic steels (5) along the circumference; the radial cross section of the magnetic steel (5) is trapezoidal structure, and the small end of the magnetic steel (5) is close to the motor shaft (1); the first magnetic steel groove (24) and the second magnetic steel groove (42) are trapezoidal grooves matched with the magnetic steel (5), and the small end of the trapezoidal groove is close to the motor shaft (1).

5. The axial end surface motor of claim 4, wherein: further comprising two roller bearings (12); the middle part of the first rotor disc (2) and the second rotor disc (4) is respectively provided with a stepped hole (25); the small end inner wall of the stepped hole (25) is gap fit with the motor shaft (1), and the large end inner wall is respectively fixed with the outer ring of the two roller bearings (12), and the inner ring of the two roller bearings (12) is respectively fixed with the motor shaft (1).

6. The axial end surface motor of claim 5, wherein: ​ ​ ​ The stator disc (6) comprises a disc body (63) and X radial protrusions (64); the X radial protrusions (64) are evenly distributed along the outer wall of the disc body (63) to form X grooves (65); and X core windings are arranged in the X grooves (65) respectively; The core winding comprises a core (7) and a winding; two adjacent cores (7) are pasted on the end faces of the two ends in the axial direction; and the winding is used for being connected with an external driver.

7. The axial end face motor capable of resisting magnetic pull and deformation according to claim 6, characterized in that: The disc body (63) is provided with a third ring wall (66) and a fourth ring wall (67) on one side wall from outside to inside in sequence, and a fifth ring wall (68) and a sixth ring wall (69) on the other side wall from outside to inside in sequence, and the heights of the third ring wall (66), the fourth ring wall (67), the fifth ring wall (68) and the sixth ring wall (69) in the axial direction are equal; The first stator magnetic ring groove (61) is formed by the third ring wall (66), the fourth ring wall (67) and one side wall of the disc body (63) between the third ring wall (66) and the fourth ring wall (67); The second stator magnetic ring groove (62) is formed by the fifth ring wall (68), the sixth ring wall (69) and the other side wall of the disc body (63) between the fifth ring wall (68) and the sixth ring wall (69).

8. The axial end face motor capable of resisting magnetic pull and deformation according to claim 7, characterized in that: The core (7) comprises a first core plate (71), a second core plate (72) and a core body (73) vertically connected between the first core plate (71) and the second core plate (72), and the first core plate (71), the core body (73) and the second core plate (72) are connected to form a H-shaped structure; The core body (73) is arranged vertically between the adjacent radial protrusions (64), and the positions of the two sides of the middle part correspond to the positions of the radial protrusions (64) and are provided with limiting grooves matched with the positions, and the limiting grooves and the corresponding radial protrusions (64) are matched to clamp the core body (73) in the corresponding groove (65); The winding is arranged on the core body (73) between the limiting groove and the first core plate (71) and between the limiting groove and the second core plate (72) respectively.

9. The axial end face motor capable of resisting magnetic pull and deformation according to claim 8, characterized in that: It further comprises a connecting piece (13); The core body (73) is a cuboid structure, and a first mounting hole is arranged on the side surface in the width direction of the core body (73); A second mounting hole is arranged on the groove bottom of the groove (65); The connecting piece (13) is sequentially connected through the first mounting hole and the second mounting hole from outside to inside to fix and install the core body (73) on the disc body (63).

10. The axial end face motor capable of resisting magnetic pull and deformation according to claim 9, characterized in that: The outer end faces of the first rotor disc (2) and the second rotor disc (4) are provided with reinforcing ribs; The first rotor disc (2) is integrally made with the first ring wall (22) and the second ring wall (23). The disc body (63) is integrally formed with X radial protrusions (64), a third ring wall (66), a fourth ring wall (67), a fifth ring wall (68) and a sixth ring wall (69); The bottom of the first stator magnetic ring slot (61) and the second stator magnetic ring slot (62) is respectively provided with a ceramic ring (14) for heat insulation to avoid demagnetization of the static magnetic ring (10).

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