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

Abstract

The invention relates to a wheel hub motor, in particular to an anti-magnetic-pulling-force and anti-deformation axial end face motor, and solves the technical problem that a rotor structure of an existing axial magnetic flux motor cannot resist 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] The present invention relates to a wheel hub motor, and more particularly to an axial end face motor with anti-magnetic pulling force and anti-deformation. Background Art

[0002] For the stator structure and rotor structure of axial flux motors, carbon fiber materials, high-strength steel, or high-strength aluminum are mostly used to prevent deformation caused by the suction force of the rotor permanent magnet on the stator teeth. As a result, the motor has a high cost, heavy weight, and low power density. Especially for some disk-type axial flux motors with larger radial dimensions, only carbon fiber materials can be used for the stator structure and rotor structure. Although it can prevent suction deformation, its selling price is generally tens of thousands of yuan per unit, which is expensive.

[0003] The existing stator winding without iron core solves the problem of suction deformation of axial flux motors, but the magnetic field strength of this stator winding is low, the power density is limited, its magnetic field needs to be closed through air, and the magnetic resistance is extremely large, significantly reducing the effective air-gap magnetic density, which is only 1 / 5 to 1 / 3 of that of an iron-core motor; in order to achieve the same torque, the stator winding without iron core needs to greatly increase the winding current or the number of turns, resulting in a sharp increase in copper loss. High copper loss means low efficiency. If the magnetic field is weakened, higher current compensation is required, especially in continuous operation or high-load scenarios, and the heating problem is prominent.

[0004] Axial flux motors have many advantages compared to radial flux motors, but their market applications are very few. The main reason is that when the axial flux motor is in the non-operating state, the magnetic fields of the stator iron core and the rotor permanent magnet are generated on two planes along the axis direction, resulting in an axial suction force of the permanent magnet on the iron core. If the anti-bending deformation ability of the rotor structure is less than the axial suction force of the magnet on the iron core, the rotor permanent magnet will adsorb on the stator iron core and cannot work. If the anti-bending deformation ability of the rotor structure meets the axial suction force of the rotor permanent magnet on the iron core, then the cost of the rotor structure is either expensive in terms of material price or very heavy in terms of mass, thus losing the advantages over radial flux motors. Therefore, there is an urgent need to develop a low-cost and high-efficiency axial motor, so that the rotor structure can resist the attractive force of the rotor permanent magnet on the stator teeth and avoid deformation of the rotor structure without changing the original designed air-gap size. Summary of the Invention

[0005] The object of the present invention is to solve the technical problem that the rotor structure of the existing axial flux motor cannot resist the attractive force of the rotor permanent magnet on the stator teeth and causes deformation of the rotor structure, and to provide an axial end face motor with anti-magnetic pulling force and anti-deformation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An axial end-face motor with anti-magnetic tensile force and anti-deformation, which is characterized in that it includes 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 permanent magnets connected in sequence along the axial direction, where Y≥1; an installation cavity is formed between the first rotor disk, the rotor connecting ring, and the second rotor disk; on the inner end face of the first rotor disk facing the stator assembly, there is a first rotor magnetic ring groove close to the motor shaft, and at a position corresponding to the first rotor magnetic ring groove on the inner end face of the second rotor disk facing the stator assembly, there is a second rotor magnetic ring groove; among them, the N poles and S poles of Y / 2 permanent magnets are evenly staggered along the circumferential direction on the inner end face of the first rotor disk and are located outside the first rotor magnetic ring groove, and the N poles and S poles of the other Y / 2 permanent magnets are evenly staggered along the circumferential direction on the inner end face of the second rotor disk and are located outside the second rotor magnetic ring groove, and are radially corresponding to the Y / 2 permanent magnets on the first rotor disk. The magnetic poles of the permanent magnets in the first rotor disk are opposite to the magnetic poles of the permanent magnets in the corresponding second rotor disk, which is used to generate a first axial magnetic field; the outer end face of the first rotor disk is used to output power;

[0009] The stator assembly is located in the installation cavity and includes a stator disk and 3X iron core windings, where X≥1; on one side wall of the stator disk, at a position corresponding to the first rotor magnetic ring groove, there is a first stator magnetic ring groove, and on the other side wall, at a position corresponding to the second rotor magnetic ring groove, there is a second stator magnetic ring groove; X iron core windings are evenly distributed along the outer circumference of the stator disk, and the circumference where the iron core windings are located corresponds to the radial positions of Y permanent magnets. When the iron core windings are energized, a second axial magnetic field is generated, which is used to interact with the first axial magnetic field to generate a radial torque;

[0010] The magnetic levitation assembly includes two magnetic ring seats, 2K moving magnetic rings, 2K static magnetic rings, and a plurality of adjusting bolts, where K≥1; the two magnetic ring seats are respectively arranged in the first rotor magnetic ring groove and the second rotor magnetic ring groove through the adjusting bolts and have the same adjusting length along the axial direction; the 2K moving magnetic rings are evenly divided into two groups and are respectively adsorbed on the end faces of the two magnetic ring seats facing the stator; the 2K static magnetic rings are evenly divided into two groups and are respectively arranged in the first stator magnetic ring groove and the second stator magnetic ring groove, and the end faces of the static magnetic rings opposite to the moving magnetic rings have the same magnetic poles to form 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 on the end faces of the two magnetic ring seats facing the stator; the 2K static magnetic rings are respectively arranged in the first stator magnetic ring groove and the second stator magnetic ring groove in sequence along the radial direction; or, the 2K moving magnetic rings are evenly divided into two groups along the axial direction and are respectively adsorbed on the end faces of the two magnetic ring seats facing the stator; the 2K static magnetic rings are respectively arranged in the first stator magnetic ring groove and the second stator magnetic ring groove in sequence along the axial direction.

[0012] Further, on the inner end faces of the first rotor disk and the second rotor disk, a first ring wall and a second ring wall are sequentially arranged from outside to inside on the inner sides of Y / 2 magnetic steel pieces. The first ring wall and the second ring wall have equal heights along the axial direction. The first rotor magnetic ring groove is formed by the first ring wall, the second ring wall, and the inner end face of the first rotor disk located between the first ring wall and the second ring wall. The second rotor magnetic ring groove is formed by the first ring wall, the second ring wall, and the inner end face of the second rotor disk located between the first ring wall and the second ring wall. Screw holes are arranged in both the first rotor magnetic ring groove and the second rotor magnetic ring groove. One end of the adjusting bolt is connected to the screw hole, and the other end is connected to the corresponding magnetic ring seat, and the axial position of the magnetic ring seat in the first rotor magnetic ring groove or the second rotor magnetic ring groove is adjusted through the thread.

[0013] Further, Y / 2 first magnetic steel grooves adapted to the magnetic steel pieces are evenly arranged along the circumference on the inner end face of the first rotor disk; Y / 2 second magnetic steel grooves adapted to the magnetic steel pieces are evenly arranged along the circumference on the inner end face of the second rotor disk; the radial cross-section of the magnetic steel piece is a trapezoidal structure, and the small end of the magnetic steel piece is close to the motor shaft; the first magnetic steel groove and the second magnetic steel groove are respectively trapezoidal grooves adapted to the magnetic steel piece, and the small end of the trapezoidal groove is close to the motor shaft.

[0014] Further, two roller bearings are further included; step holes are respectively arranged in the middle parts of the first rotor disk and the second rotor disk; the inner wall of the small end of the step hole is in clearance fit with the motor shaft, the inner walls of the large ends are respectively fixedly connected to the outer rings of the two roller bearings, and the inner rings of the two roller bearings are respectively fixedly connected to the motor shaft.

[0015] Further, the stator disk includes a disk body and X radial protrusions; the X radial protrusions are evenly distributed along the circumferential direction of the outer wall of the disk body to form X grooves; X iron core windings are respectively arranged in the X grooves; the iron core winding includes an iron core and a winding; the end faces at both axial ends of adjacent two iron cores are in contact with each other; the winding is used for connecting to an external driver.

[0016] Further, a third ring wall and a fourth ring wall are sequentially arranged from outside to inside on one side wall of the disk body, and a fifth ring wall and a sixth ring wall are sequentially arranged from outside to inside on the other side wall, and the third ring wall, the fourth ring wall, the fifth ring wall, and the sixth ring wall have equal heights 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 positions corresponding to the radial protrusions on both sides of the middle are respectively provided with limiting grooves adapted thereto, and the limiting grooves cooperate with the corresponding radial protrusions to clip the core body into the corresponding grooves; the windings are respectively arranged on the core body between the limiting grooves and the first core plate and between the limiting grooves and the second core plate.

[0018] Furthermore, the invention also includes a connecting piece; the core body is a rectangular structure, and a through first mounting hole is arranged on the side surface along the width direction; a second mounting hole is arranged at the bottom of the groove; the connecting piece passes through the first mounting hole and is connected with the second mounting hole in sequence from the outside to the inside, so as to fix the core body on the disc body.

[0019] Furthermore, the outer end surfaces of the first rotor disc and the second rotor disc are both provided with reinforcing ribs; the first rotor disc is integrally formed with the first ring wall and the second ring wall; the disc 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; the bottoms of the first stator magnetic ring groove and the second stator magnetic ring groove are respectively provided with ceramic rings for heat insulation to prevent demagnetization of the static magnetic ring.

[0020] Beneficial effects of the present invention:

[0021] 1. The axial end face motor with anti-magnetic tension and anti-deformation of the present invention has magnetic suspension components arranged in the first rotor magnetic ring groove and the second rotor magnetic ring groove, which can reduce the weight of the axial end face motor and flexibly adjust the size of the repulsive force between the first rotor disk, the second rotor disk and the stator disk respectively. If the distance between the static magnetic ring and the dynamic magnetic ring is smaller, the repulsive force is greater, which solves the technical problems of the existing axial flux motor with high cost and low efficiency, and the rotor structure cannot resist the attraction of the rotor permanent magnet to the stator teeth, causing the rotor structure to deform.

[0022] 2. The axial end face motor with anti-magnetic tension and anti-deformation in the present invention has a static magnetic ring and a dynamic magnetic ring which are both unipolar magnetic rings and repel each other to form an axial suspension state. Therefore, the repulsive force of the static magnetic ring and the dynamic magnetic ring is used to apply a supporting force between the first rotor disk and the second rotor disk and the stator disk respectively to prevent the first rotor disk and the second rotor disk from bending and deforming, thereby ensuring the designed air gap size.

[0023] 3. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, when 2K moving magnetic rings and 2K static magnetic rings are arranged radially, when the radial dimension of the axial end-face motor is too large, the repulsive force can be evenly distributed between the first rotor disk, the second rotor disk and the stator disk; when 2K moving magnetic rings and 2K static magnetic rings are arranged axially, the repulsive force between the first rotor disk, the second rotor disk and the stator disk can be increased to ensure that it does not deform.

[0024] 4. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, the positions of the two magnetic ring seats in the axial and radial directions can be restricted through the first rotor magnetic ring groove and the second rotor magnetic ring groove, and then the axial distance between the static magnetic ring and the moving magnetic ring can be controlled by adjusting bolts, so as to ensure the stability of the designed air gap size.

[0025] 5. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, the moving magnetic ring is limited in the radial direction by the first ring wall and the second ring wall to prevent the moving magnetic ring from undergoing radial displacement when the repulsive forces between the static magnetic ring and the moving magnetic ring interact.

[0026] 6. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, the static magnetic ring is limited in the radial direction by the third ring wall, the fourth ring wall, the fifth ring wall and the sixth ring wall to prevent the static magnetic ring from undergoing radial displacement when the repulsive forces between the static magnetic ring and the moving magnetic ring interact.

[0027] 7. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, two roller bearings can be used to maintain the perpendicularity of the installation of the first rotor disk, the second rotor disk and the motor shaft.

[0028] 8. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, the deformation caused by the suction force between the magnetic field of the magnetic steel and the iron core winding can be reduced structurally through the reinforcing ribs.

[0029] 9. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, 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, making its processing more convenient and the structure more stable.

[0030] 10. For the axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention, ceramic rings are respectively arranged at the bottoms of the first stator magnetic ring groove and the second stator magnetic ring groove for heat insulation to prevent the heat generated by the iron core winding from being directly transferred to the static magnetic ring, resulting in demagnetization of the static magnetic ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of an embodiment of an axial end-face motor with anti-magnetic tensile force and anti-deformation of the present invention;

[0032] Figure 2It is an exploded view of an axial end face motor with anti-magnetic pulling force and anti-deformation according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the first rotor disk in an axial end face motor with anti-magnetic pulling force and anti-deformation according to an embodiment of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the stator disk in an axial end face motor with anti-magnetic pulling force and anti-deformation according to an embodiment of the present invention;

[0035] Figure 5 It is a schematic structural diagram of the assembly of the stator disk and the iron core in an axial end face motor with anti-magnetic pulling force and anti-deformation according to an embodiment of the present invention.

[0036] Explanation of reference numerals:

[0037] 1 - motor shaft, 2 - first rotor disk, 21 - first rotor magnet ring groove, 22 - first ring wall, 23 - second ring wall, 24 - first magnet steel groove, 25 - stepped hole, 26 - screw hole, 3 - rotor connecting ring, 4 - second rotor disk, 41 - second rotor magnet ring groove, 42 - second magnet steel groove, 5 - magnet steel, 6 - stator disk, 61 - first stator magnet ring groove, 62 - second stator magnet 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 - magnet ring seat, 9 - moving magnet ring, 10 - static magnet ring, 11 - adjusting bolt, 12 - roller bearing, 13 - connecting piece, 14 - ceramic ring. Detailed implementation manners

[0038] As Figure 1 、 Figure 2 、 Figure 3 shown, an axial end face motor with anti-magnetic pulling force and anti-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 connecting piece 13; the rotor assembly includes a first rotor disk 2, a rotor connecting ring 3, a second rotor disk 4, and 4Y magnet steels 5 connected in sequence along the axial direction, where Y≥1; an installation cavity is formed among the first rotor disk 2, the rotor connecting ring 3, and the second rotor disk 4. As Figure 3As shown in the figure, on the inner end face of the first rotor disk 2 facing the stator assembly, there is a first rotor magnet ring groove 21 close to the motor shaft 1. At a position corresponding to the first rotor magnet ring groove 21 on the inner end face of the second rotor disk 4 facing the stator assembly, there is a second rotor magnet ring groove 41. Among them, the N poles and S poles of Y / 2 magnets 5 are arranged evenly and alternately along the circumferential direction on the inner end face of the first rotor disk 2 and are located outside the first rotor magnet ring groove 21. The N poles and S poles of the other Y / 2 magnets 5 are arranged evenly and alternately along the circumferential direction on the inner end face of the second rotor disk 4 and are located outside the second rotor magnet ring groove 41, and their radial positions correspond to those 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 magnets 5 in the corresponding 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] As Figure 1 , Figure 2 , Figure 4 , Figure 5 shown in the figure, the stator assembly is located in the installation cavity, and it includes a stator disk 6 and 3X iron core windings, where X≥1. At a position corresponding to the first rotor magnet ring groove 21 on one side wall of the stator disk 6, there is a first stator magnet ring groove 61. At a position corresponding to the second rotor magnet ring groove 41 on the other side wall, there is a second stator magnet ring groove 62. X iron core windings are evenly distributed along the circumferential direction of the outer wall of the stator disk 6, and the circumference where the iron core windings are located corresponds to the radial positions of Y magnets 5. When the iron core windings are energized, a second axial magnetic field is generated, which is used to interact with the first axial magnetic field to generate a radial torque.

[0040] As Figure 2 shown in the figure, the magnetic levitation assembly includes two magnetic ring seats 8, two moving magnetic rings 9, two static magnetic rings 10, and a plurality of adjusting bolts 11. The two magnetic ring seats 8 are respectively arranged in the first rotor magnet ring groove 21 and the second rotor magnet ring groove 41 through the adjusting bolts 11, and their adjusting lengths along the axial direction are equal. The two moving 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 two static magnetic rings 10 are evenly divided into two groups and are respectively arranged in the first stator magnet ring groove 61 and the second stator magnet ring groove 62. The end faces of the static magnetic rings 10 opposite to the moving magnetic rings 9 have the same magnetic poles to form an axial levitation state. One end of the adjusting bolt 11 is connected to the bottom of the first rotor magnet ring groove 21 or the bottom of the second rotor magnet ring groove 41, and the other end is connected to the magnetic ring seat 8, which is used to adjust the levitation distance between the moving magnetic ring 9 and the static magnetic ring 10 along the axial direction and thus adjust the magnitude of the repulsive force.

[0041] In order to better adjust the repulsive force, the two moving magnetic rings 9 are evenly divided into two groups along the radial direction and are respectively adsorbed on the end faces of the two magnetic ring seats 8 facing the stator; the two static magnetic rings 10 are respectively arranged in the first stator magnetic ring groove 61 and the second stator magnetic ring groove 62 in sequence along the radial direction; alternatively, the two moving magnetic rings 9 are adsorbed on the end faces of the two magnetic ring seats 8 facing the stator in sequence along the axial direction; the two static magnetic rings 10 are arranged in the first stator magnetic ring groove 61 and the second stator magnetic ring groove 62 in sequence along the axial direction. The adjustment lengths of the two magnetic ring seats 8 along the axial direction are equal. A supporting force is applied between the first rotor disk 2 and the second rotor disk 4 and the stator disk 6 respectively through the repulsive force between the static magnetic ring 10 and the moving magnetic ring 9, preventing the first rotor disk 2 and the second rotor disk 4 from bending and deforming, so as to ensure the designed air gap size. Ceramic rings 14 are respectively arranged at the bottoms of the first stator magnetic ring groove 61 and the second stator magnetic ring groove 62 to prevent the static magnetic ring 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 ring wall 22 and a second ring wall 23 are sequentially arranged from outside to inside on the inner sides of Y / 2 magnetic steels 5, and the heights of the first ring wall 22 and the second ring wall 23 along the axial direction are 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 face of the first rotor disk 2 located 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 face of the second rotor disk 4 located between the first ring wall 22 and the second ring wall 23; screw holes 26 are arranged in both the first rotor magnetic ring groove 21 and the second rotor magnetic ring groove 41; 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, 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.

[0043] As Figure 3 shown, Y / 2 first magnetic steel grooves 24 adapted to the magnetic steel 5 are evenly arranged along the circumference on the inner end face of the first rotor disk 2; Y / 2 second magnetic steel grooves 42 adapted to the magnetic steel 5 are evenly arranged along the circumference on the inner end face of the second rotor disk 4; the radial cross-section of the magnetic steel 5 is a trapezoidal structure, and the small end of the magnetic steel 5 is close to the motor shaft 1; the first magnetic steel grooves 24 and the second magnetic steel grooves 42 are respectively trapezoidal grooves adapted to the magnetic steel 5, and the small ends of the trapezoidal grooves are close to the motor shaft 1.

[0044] Step holes 25 are respectively arranged in the middle parts of the first rotor disk 2 and the second rotor disk 4; the inner wall of the small end of the step hole 25 is in clearance fit with the motor shaft 1, and the inner walls of the large ends are respectively fixedly connected to the outer rings of the two roller bearings 12, and the inner rings of the two roller bearings 12 are respectively fixedly connected to the motor shaft 1.

[0045] As 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 circumferentially and evenly distributed along the outer wall of the disk body 63 to form X grooves 65; the X iron core windings are respectively arranged in the X grooves 65; the iron core winding includes an iron core 7 and a winding; the end faces of two adjacent iron cores 7 are in contact with each other at both axial ends; the winding is used to connect to an external driver. On one side wall of the disk body 63, a third ring wall 66 and a fourth ring wall 67 are sequentially arranged from outside to inside, and on the other side wall, a fifth ring wall 68 and a sixth ring wall 69 are sequentially arranged from outside to inside, and the third ring wall 66, the fourth ring wall 67, the fifth ring wall 68 and the sixth ring wall 69 have the same height along the axis. 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 iron 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, and after the first core plate 71, the core body 73 and the second core plate 72 are connected, they form an I-shaped structure; the core body 73 is used to be vertically arranged between adjacent radial protrusions 64, and limiting grooves adapted to them are respectively arranged at positions corresponding to the two sides of the middle part of the core body 73 opposite to the radial protrusions 64, and the limiting grooves cooperate with the corresponding radial protrusions 64 to clamp the core body 73 in the corresponding groove 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 is a cuboid structure, and a through first mounting hole is arranged on the side surface along its width direction; a second mounting hole is arranged at the bottom of the groove 65; a connecting piece 13 sequentially passes through the first mounting hole and the second mounting hole from outside to inside for connection, and fixes and mounts the core body 73 on the disk body 63.

[0047] Reinforcing ribs are arranged on the outer end faces of the first rotor disk 2 and the second rotor disk 4, which can structurally reduce the deformation caused by the suction force generated between the magnetic field of the permanent magnet 5 and the iron core winding; 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 the 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] An axial end-face motor with anti-magnetic tensile force and anti-deformation according to the present invention can solve the problems of deformation of the rotor assembly or the stator assembly caused by the mutual attraction between the magnetic steel 5 and the iron core 7 existing in various axial motors. Since the moving magnetic ring 9 and the static magnetic ring 10 are opposite in the same pole, they repel each other, which is used to resist the suction force between the magnetic steel 5 and the 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 repulsive force between the first rotor disk 2 and the second rotor disk 4 and the disk body 63, and then the distance between the moving magnetic ring 9 and the static magnetic ring 10 is controlled to control the magnitude of the repulsive force. The repulsive moving magnetic ring 9 and static magnetic ring 10 can increase the number of magnetic ring groups according to the power and size of the axial motor.

Claims

1. An axial end face motor with anti-magnetic tension and anti-deformation, characterized in that: It comprises a motor shaft (1), a rotor assembly rotatably sleeved on the motor shaft (1), a stator assembly fixedly sleeved on the motor shaft (1), and a magnetic suspension assembly; The rotor assembly comprises a first rotor disc (2), a rotor connecting ring (3), a second rotor disc (4), and 4Y magnetic steels (5) connected in sequence along the axial direction, where Y≥1; a mounting cavity is formed between the first rotor disc (2), the rotor connecting ring (3), and the second rotor disc (4); a first rotor magnetic ring groove (21) close to the motor shaft (1) is arranged on the inner end surface of the first rotor disc (2) facing the stator assembly, and a second rotor magnetic ring groove (41) is arranged on the inner end surface of the second rotor disc (4) facing the stator assembly at a position corresponding to the first rotor magnetic ring groove (21); wherein N of the Y / 2 magnetic steels (5) is The N poles and S poles are evenly staggered along the circumferential direction on the inner end surface of the first rotor disk (2) and are located outside the first rotor magnetic ring groove (21); in addition, the N poles and S poles of Y / 2 magnetic steels (5) are evenly staggered along the circumferential direction on the inner end surface of the second rotor disk (4) and are located outside the second rotor magnetic ring groove (41), and correspond to the radial positions of the Y / 2 magnetic steels (5) on the first rotor disk (2); the magnetic poles of the magnetic steels (5) in the first rotor disk (2) are opposite to the magnetic poles of the magnetic steels (5) in the corresponding second rotor disk (4), and are used to generate a first axial magnetic field; the outer end surface of the first rotor disk (2) is used to output power; The stator assembly is located in the installation cavity, and comprises a stator disk (6) and 3X iron core windings, where X≥1; a first stator magnetic ring groove (61) is provided at a position corresponding to the first rotor magnetic ring groove (21) on one side wall of the stator disk (6), and a second stator magnetic ring groove (62) is provided at a position corresponding to the second rotor magnetic ring groove (41) on the other side wall; the X iron core windings are evenly distributed along the circumference of the outer wall of the stator disk (6), and the circumference of the iron core windings corresponds to the radial position of the Y magnetic steels (5); when the iron core windings are energized, a second axial magnetic field is generated, which is used to interact with the first axial magnetic field to generate a radial torque; The magnetic suspension assembly comprises two magnetic ring seats (8), 2K dynamic magnetic rings (9), 2K static magnetic rings (10) and a plurality of adjustment bolts (11), K≥1; the two magnetic ring seats (8) are respectively arranged in a first rotor magnetic ring groove (21) and a second rotor magnetic ring groove (41) through the adjustment bolts (11), and their adjustment lengths along the axial direction are equal; the 2K dynamic magnetic rings (9) are evenly divided into two groups, and are respectively adsorbed on the end surfaces 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 a first stator magnetic ring groove (61) and a second stator magnetic ring groove (62), and the end surface magnetic poles of the static magnetic ring (10) and the dynamic magnetic ring (9) are the same to form an axial suspension state.

2. According to claim 1, the axial end face motor with anti-magnetic tension and anti-deformation is characterized in that: The 2K dynamic magnetic rings (9) are evenly divided into two groups in sequence along the radial direction and are respectively adsorbed on the end surfaces of the two magnetic ring seats (8) facing the stator; the 2K static magnetic rings (10) are arranged in sequence in the first stator magnetic ring slot (61) and the second stator magnetic ring slot (62) in sequence along the radial direction; Alternatively, the 2K dynamic magnetic rings (9) are sequentially adsorbed on the end surface of the magnetic ring seat (8) facing the stator along the axial direction; and the 2K static magnetic rings (10) are sequentially arranged in the first stator magnetic ring groove (61) and the second stator magnetic ring groove (62) along the axial direction.

3. According to claim 2, the axial end face motor with anti-magnetic tension and anti-deformation is characterized in that: A first annular wall (22) and a second annular wall (23) are arranged on the inner end surfaces of the first rotor disc (2) and the second rotor disc (4) in sequence from the outside to the inside on the inner side of the Y / 2 magnetic steels (5), and the first annular wall (22) and the second annular wall (23) have the same height in the axial direction; The first rotor magnetic ring groove (21) is formed by a first ring wall (22), a second ring wall (23) and an inner end surface of a first rotor disk (2) located between the first ring wall (22) and the second ring wall (23); The second rotor magnetic ring groove (41) is formed by a first ring wall (22), a second ring wall (23) and an inner end surface of a second rotor disk (4) located 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 both 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), 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 by threading.

4. According to claim 3, the axial end face motor with anti-magnetic tension and anti-deformation is characterized in that: The inner end surface of the first rotor disc (2) is evenly provided with Y / 2 first magnetic steel grooves (24) adapted to the magnetic steel (5) along the circumference; The inner end surface of the second rotor disc (4) is evenly provided with Y / 2 second magnetic steel grooves (42) adapted to the magnetic steel (5) along the circumference; The radial cross section of the magnetic steel (5) is a trapezoidal structure, and the small end of the magnetic steel (5) is arranged close to the motor shaft (1); The first magnetic steel slot (24) and the second magnetic steel slot (42) are respectively trapezoidal slots adapted to the magnetic steel (5), and the small ends of the trapezoidal slots are arranged close to the motor shaft (1).

5. The axial end face motor with anti-magnetic tension and anti-deformation according to claim 4, characterized in that: Also includes two roller bearings (12); The first rotor disc (2) and the second rotor disc (4) are respectively provided with a step hole (25) in the middle; the inner wall of the small end of the step hole (25) is clearance-matched with the motor shaft (1), and the inner wall of the large end is respectively fixedly connected to the outer rings of two roller bearings (12); and the inner rings of the two roller bearings (12) are respectively fixedly connected to the motor shaft (1).

6. The axial end face motor with anti-magnetic tension and anti-deformation according to claim 5, characterized in that: The stator disc (6) comprises a disc body (63) and X radial protrusions (64); the X radial protrusions (64) are evenly distributed along the circumferential direction of the outer wall of the disc body (63) to form X grooves (65); and the X iron core windings are respectively arranged in the X grooves (65); The iron core winding comprises an iron core (7) and a winding; the end faces of two adjacent iron cores (7) at both ends along the axial direction are adjacent to each other; and the winding is used to be connected to an external driver.

7. The axial end face motor with anti-magnetic tension and anti-deformation according to claim 6, characterized in that: A third annular wall (66) and a fourth annular wall (67) are sequentially arranged on one side wall of the disc body (63) from outside to inside, and a fifth annular wall (68) and a sixth annular wall (69) are sequentially arranged on the other side wall from outside to inside, 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 in the axial direction; The first stator magnetic ring groove (61) is formed by a third ring wall (66), a fourth ring wall (67) and a side wall of a 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 a fifth ring wall (68), a sixth ring wall (69) and the other side wall of the disc body (63) located between the fifth ring wall (68) and the sixth ring wall (69).

8. The axial end face motor with anti-magnetic tension and anti-deformation according to claim 7, characterized in that: The iron 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 an I-shaped structure; The core body (73) is used to be vertically arranged between adjacent radial protrusions (64), and positions on both sides of the middle thereof corresponding to the radial protrusions (64) are respectively provided with stop grooves adapted thereto, and the stop 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).

9. The axial end face motor with anti-magnetic tension and anti-deformation according to claim 8, characterized in that: Also includes a connecting piece (13); The core (73) is a rectangular parallelepiped structure, and a through first mounting hole is provided on the side surface along the width direction thereof; A second mounting hole is provided at the bottom of the groove (65); The connecting piece (13) passes through the first mounting hole and is connected to the second mounting hole in sequence from the outside to the inside, so as to fix the core body (73) on the disc body (63).

10. The axial end face motor with anti-magnetic tension and anti-deformation according to claim 9, characterized in that: The outer end surfaces of the first rotor disc (2) and the second rotor disc (4) are both provided with reinforcing ribs; The first rotor disk (2) is made integrally with the first annular wall (22) and the second annular wall (23); The disc body (63) is integrally formed with the X radial protrusions (64), the third annular wall (66), the fourth annular wall (67), the fifth annular wall (68) and the sixth annular wall (69); Ceramic rings (14) are respectively provided at the bottoms of the first stator magnetic ring groove (61) and the second stator magnetic ring groove (62) for heat insulation and preventing demagnetization of the static magnetic ring (10).

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