Magnetic gear composite motor and wheel

Abstract

The invention provides a magnetic gear composite motor and a wheel, and belongs to the technical field of motors. The magnetic gear composite motor comprises a motor stator, a motor rotor, a magnetism adjusting rotor, a magnetism adjusting ring and a magnetism adjusting stator. The motor rotor comprises a rotating shaft and a plurality of first magnetic steels, the rotating shaft is rotatably connected with the motor stator, and the plurality of first magnetic steels are located on the surface, opposite to the motor stator, of the rotating shaft and are connected with the rotating shaft; the magnetic adjusting rotor is annularly sleeved on the outer side of the rotating shaft and is connected with the rotating shaft; the magnetic field adjusting ring sleeves the outer side of the magnetic field adjusting rotor and is rotationally connected with the rotating shaft; the magnetic adjusting stator is sleeved on the outer side of the magnetic adjusting ring and is connected with the motor stator. According to the invention, the driving motor part and the magnetic gear part are decoupled in electromagnetic design and can be designed separately and independently, so that the flexibility of the structural design of the motor is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular to a magnetic gear compound motor and a wheel. Background Art

[0002] Magnetic gear compound motors are gradually becoming the first choice for more equipment due to their low speed and high torque characteristics.

[0003] The magnetic gear compound motor usually includes a rotor, a magnetic adjustment ring, a motor stator and a magnetic adjustment stator. These four components are coaxially arranged, from the inside to the outside, they are the rotor, the magnetic adjustment ring, the magnetic adjustment stator and the motor stator, among which the magnetic adjustment stator is fixed on the inner wall of the motor stator. After the motor stator is energized, a magnetic field loop will be formed between the motor stator and the rotor, driving the rotor to rotate rapidly. At the same time, a magnetic field loop is also formed between the rotor, the magnetic adjustment ring and the magnetic adjustment stator. The rotor rotates rapidly and the magnetic adjustment stator is fixed, which will drive the magnetic adjustment ring to rotate slowly, thereby outputting low-speed torque to the outside.

[0004] However, in the above-mentioned magnetic gear composite motor, due to the coupling design of the magnetic field circuit generated by the driving motor part (motor stator and rotor) and the magnetic field circuit generated by the magnetic gear part (magnetic regulating stator, magnetic regulating ring and rotor), both magnetic field circuits are related to the rotor magnetic field, and the flexibility of the motor structure design is relatively low. Summary of the invention

[0005] The embodiments of the present disclosure provide a magnetic gear compound motor and a wheel, which can solve the technical problems existing in the related art. The technical solutions of the magnetic gear compound motor and the wheel are as follows:

[0006] On the one hand, an embodiment of the present disclosure provides a magnetic gear compound motor, wherein the magnetic gear compound motor includes a motor stator, a motor rotor, a magnetic adjustment rotor, a magnetic adjustment ring and a magnetic adjustment stator;

[0007] The motor rotor comprises a rotating shaft and a plurality of first magnetic steels, the rotating shaft is rotatably connected to the motor stator, and the plurality of first magnetic steels are located on a surface of the rotating shaft opposite to the motor stator and are connected to the rotating shaft;

[0008] The magnetically adjustable rotor is sleeved on the outer side of the rotating shaft and is connected to the rotating shaft;

[0009] The magnetic adjustment ring is sleeved on the outer side of the magnetic adjustment rotor and is rotatably connected to the rotating shaft;

[0010] The magnetic adjustment stator ring is sleeved on the outer side of the magnetic adjustment ring and is connected to the motor stator.

[0011] In a possible implementation, the motor stator includes a stator yoke and a plurality of stator coils, the stator yoke has a disc structure, and the plurality of stator coils are connected to one side of the stator yoke;

[0012] The rotating shaft is located on a side of the stator yoke close to the stator coil and is rotatably connected to the stator yoke. The multiple first magnetic steels are located on a surface of the rotating shaft opposite to the multiple stator coils, and the surface is perpendicular to the axis of the rotating shaft.

[0013] In a possible implementation, the magnetic gear compound motor further includes a first bearing;

[0014] The stator yoke has a first annular protrusion on one side close to the rotating shaft, and the plurality of stator coils are located outside the first annular protrusion;

[0015] A cylindrical protrusion is provided on the surface, and one end of the cylindrical protrusion close to the stator yoke is located in the first annular protrusion;

[0016] The inner ring of the first bearing is connected to the outer side wall of the cylindrical protrusion, and the outer ring of the first bearing is connected to the inner side wall of the first annular protrusion.

[0017] In a possible implementation, the magnetic gear compound motor further includes an end cover;

[0018] The motor stator comprises a stator yoke and a plurality of stator coils, the stator yoke has a circular ring structure, one end of the stator yoke is connected to the end cover, and the plurality of stator coils are located inside the stator yoke and connected to the stator yoke;

[0019] One end of the rotating shaft is passed through the inner side of the stator yoke and is rotatably connected to the end cover. The plurality of first magnetic steels are located on the outer side wall of the rotating shaft and correspond to the positions of the plurality of stator coils.

[0020] In a possible implementation, the magnetic gear compound motor further includes a second bearing;

[0021] The outer wall of the rotating shaft is provided with a second annular protrusion, and the second annular protrusion is located between the first magnetic steel and the magnetic adjustment rotor;

[0022] The inner ring of the second bearing is connected to the outer side wall of the second annular protrusion, and the outer ring of the second bearing is connected to an end of the magnetic adjustment ring close to the first magnetic steel.

[0023] In a possible implementation, the magnetic gear compound motor further includes a rotating member, a third bearing and a fourth bearing;

[0024] The rotating member comprises a first annular portion and a second annular portion, the first annular portion is coaxial with the second annular portion, and the outer diameter of the first annular portion is greater than the outer diameter of the second annular portion, one end of the first annular portion is connected to an end of the magnetic tuning ring away from the first magnetic steel, and the other end of the first annular portion is connected to an end surface of the second annular portion;

[0025] The inner ring of the third bearing is connected to the outer side wall of the second annular portion, and the outer ring of the third bearing is connected to an end of the magnetic modulation stator away from the motor stator;

[0026] The inner ring of the fourth bearing is connected to an end of the rotating shaft away from the first magnetic steel, and the outer ring of the fourth bearing is connected to the inner side wall of the second annular portion.

[0027] In a possible implementation manner, the third bearing and the fourth bearing are located opposite to each other.

[0028] In a possible implementation, the magnetic adjustment ring includes an annular bracket and a plurality of magnetic conductors, the annular bracket is sleeved on the outside of the magnetic adjustment rotor and is rotatably connected to the rotating shaft, the side wall of the annular bracket has a plurality of through holes distributed along the circumferential direction, each magnetic conductor is located in a different through hole and is connected to the annular bracket;

[0029] The magnetically adjustable stator comprises an annular stator housing and a plurality of second magnetic steels, wherein the annular stator housing is sleeved on the outside of the annular bracket and connected to the motor stator, and the plurality of second magnetic steels are located between the annular stator housing and the annular bracket and connected to the annular stator housing;

[0030] The positions of the magnetic tuning rotor, the plurality of magnetic conductors and the plurality of second magnetic steels correspond to each other.

[0031] In a possible implementation, the magnetically adjustable rotor includes a magnetic conductive ring and a plurality of third magnetic steels;

[0032] The magnetic conductive ring is sleeved on the outer side of the rotating shaft and connected to the rotating shaft, and the outer side wall of the magnetic conductive ring has a plurality of grooves distributed along the circumferential direction;

[0033] Each third magnetic steel is located in a different groove and is connected to the magnetic conductive ring. The positions of the plurality of third magnetic steels, the plurality of magnetic conductive bodies and the plurality of second magnetic steels correspond to each other.

[0034] On the other hand, an embodiment of the present disclosure provides a wheel, the wheel comprising a housing, a rubber-covered wheel, and a magnetic gear compound motor as described in any one of the above items;

[0035] The shell has a cylindrical structure;

[0036] The rubber-coated wheel has a circular ring structure, and the inner side wall of the rubber-coated wheel is connected to the outer side wall of the shell;

[0037] The magnetic gear compound motor is located in the housing, and the magnetic adjustment ring is connected to the housing.

[0038] The technical solution provided by the embodiments of the present disclosure includes at least the following beneficial effects:

[0039] An embodiment of the present disclosure provides a magnetic gear composite motor, wherein a driving motor part includes a motor stator and a plurality of first magnetic steels, and a magnetic gear part includes a magnetic adjustment rotor, a magnetic adjustment ring and a magnetic adjustment stator. The driving motor part and the magnetic gear part are decoupled in electromagnetic design, and the two can be designed separately and independently, thereby improving the flexibility of the motor structure design.

[0040] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 is a structural schematic diagram of a magnetic gear compound motor shown in an embodiment of the present disclosure;

[0043] Figure 2 is a schematic structural diagram of a motor rotor shown in an embodiment of the present disclosure;

[0044] Figure 3 is a schematic structural diagram of a motor stator shown in an embodiment of the present disclosure;

[0045] Figure 4 is a structural schematic diagram of a magnetic gear compound motor shown in an embodiment of the present disclosure;

[0046] Figure 5 is a structural schematic diagram of a rotating member shown in an embodiment of the present disclosure;

[0047] Figure 6 is a structural schematic diagram of a magnetic tuning ring shown in an embodiment of the present disclosure;

[0048] Figure 7 is a structural schematic diagram of a magnetically modulated stator shown in an embodiment of the present disclosure;

[0049] Figure 8is a schematic structural diagram of a motor rotor and a magnetically adjustable rotor shown in an embodiment of the present disclosure;

[0050] Fig. 9 It is a schematic diagram of the structure of a wheel shown in an embodiment of the present disclosure.

[0051] Legend

[0052] 1. Motor stator; 2. Motor rotor; 3. Magnetic adjustment rotor; 4. Magnetic adjustment ring; 5. Magnetic adjustment stator; 6. End cover; 7. Rotating part; 10. First bearing; 20. Second bearing; 30. Third bearing; 40. Fourth bearing;

[0053] 11. stator yoke; 12. stator coil; 111. first annular protrusion;

[0054] 21, rotating shaft; 22, first magnetic steel; 211, cylindrical protrusion; 212, second annular protrusion;

[0055] 31. magnetic conductive ring; 32. third magnetic steel; 311. groove;

[0056] 41. annular bracket; 42. magnetic conductor; 411. through hole;

[0057] 51. annular stator housing; 52. second magnetic steel;

[0058] 71. first annular portion; 72. second annular portion;

[0059] 100. housing; 200. rubber-coated wheel; 300. magnetic gear compound motor. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0061] The embodiment of the present disclosure provides a magnetic gear compound motor 300, such as Figure 1 As shown, the magnetic gear compound motor 300 includes a motor stator 1 , a motor rotor 2 , a magnetic adjustment rotor 3 , a magnetic adjustment ring 4 and a magnetic adjustment stator 5 .

[0062] like Figure 2 As shown, the motor rotor 2 includes a rotating shaft 21 and a plurality of first magnetic steels 22. The rotating shaft 21 has a cylindrical structure and is rotatably connected to the motor stator 1. The plurality of first magnetic steels 22 are located on a surface of the rotating shaft 21 opposite to the motor stator 1 and are connected to the rotating shaft 21. The first magnetic steels 22 may be permanent magnets.

[0063] In this way, the positions of the plurality of first magnetic steels 22 correspond to the position of the motor stator 1 , so that the plurality of first magnetic steels 22 and the motor stator 1 are arranged opposite to each other, with a small gap therebetween and no other components arranged therebetween.

[0064] The plurality of first magnetic steels 22 can be evenly arranged along the circumference of the rotating shaft 21, and the rotating shaft 21 is coaxially arranged with the motor stator 1. The number and size of the plurality of first magnetic steels 22 can be set according to the requirements and the structure of the motor stator 1, and the embodiment of the present disclosure does not limit this.

[0065] In this way, when the motor stator 1 is powered on, a magnetic field loop is generated between the motor stator 1 and the plurality of first magnetic steels 22 , driving the plurality of first magnetic steels 22 and the rotating shaft 21 to achieve rapid rotation.

[0066] In a possible implementation, the rotating shaft 21 may be made of a magnetic conductive material, for example, a ferromagnetic material, etc. This may enhance the magnetic field strength between the motor stator 1 and the motor rotor 2 , thereby improving the overall performance of the magnetic gear compound motor 300 .

[0067] Alternatively, the rotating shaft 21 may include a rotating shaft body and a rotor yoke, wherein the rotor yoke is located between the rotating shaft body and the motor stator 1 and is connected to the rotating shaft body, and a plurality of first magnetic steels 22 are located on the surface of the rotor yoke opposite to the motor stator 1, wherein the rotating shaft body may be any material with high rigidity, for example, a metal material with high rigidity, etc., and the rotor yoke is a magnetic conductive material, for example, a silicon steel material or a ferromagnetic material, etc. In this way, the magnetic field strength between the motor stator 1 and the motor rotor 2 may also be enhanced, thereby improving the overall performance of the magnetic gear compound motor 300.

[0068] The magnetic adjustment rotor 3 is sleeved on the outside of the rotating shaft 21 and connected to the rotating shaft 21. The magnetic adjustment ring 4 is sleeved on the outside of the magnetic adjustment rotor 3 and rotatably connected to the rotating shaft 21. The magnetic adjustment stator 5 is sleeved on the outside of the magnetic adjustment ring 4 and connected to the motor stator 1.

[0069] When the rotating shaft 21 is driven by the first magnetic steel 22 to realize rapid rotation, the magnetic adjustment rotor 3 connected to the rotating shaft 21 also rotates rapidly along with the rotating shaft 21. Since the magnetic adjustment stator 5 is connected to the motor stator 1, the magnetic adjustment stator 5 is fixed and does not rotate. In this way, in the magnetic field loop generated by the rapidly rotating magnetic adjustment rotor 3 and the fixed magnetic adjustment stator 5, the magnetic flux lines of the magnetic field loop pass through the magnetic adjustment ring 4, driving the magnetic adjustment ring 4 to realize slow rotation, thereby outputting low-speed torque to the outside through the magnetic adjustment ring 4.

[0070] In summary, the magnetic gear composite motor 300 provided in the embodiment of the present disclosure includes a driving motor part and a magnetic gear part. The driving motor part includes a motor stator 1 and a plurality of first magnetic steels 22. When the motor stator 1 is powered on, it drives the first magnetic steels 22 to rotate rapidly. The magnetic gear part includes a magnetic adjustment rotor 3, a magnetic adjustment ring 4 and a magnetic adjustment stator 5. When the magnetic adjustment rotor 3 rotates rapidly with the rotating shaft 21, a magnetic field loop is formed between the magnetic adjustment rotor 3 and the fixed magnetic adjustment stator 5, driving the magnetic adjustment ring 4 to rotate slowly. The driving motor part and the magnetic gear part are decoupled in electromagnetic design, and the two can be designed separately and independently.

[0071] For example, the magnetic field strength of the drive motor part can be adjusted by adjusting the number and size of the motor stator 1 or the first magnetic steel 22, and such adjustment will not affect the magnetic field circuit of the magnetic gear part. The magnetic field strength of the magnetic gear part can also be adjusted by adjusting the magnetic adjustment rotor 3, the magnetic adjustment ring 4 or the magnetic adjustment stator 5, and such adjustment will not affect the magnetic field circuit of the drive motor part. Therefore, the two can be designed and adjusted separately and independently, thereby improving the flexibility of the motor structure design.

[0072] In the embodiments of the present disclosure, there are many possible structural designs of the driving motor part, and two of them are described below as examples:

[0073] The first structural design of the drive motor part

[0074] like Figure 3 As shown, the motor stator 1 includes a stator yoke 11 and a plurality of stator coils 12 .

[0075] The stator yoke 11 has a disc structure and can be made of a magnetic conductive material to enhance the magnetic field strength and thus improve the overall performance of the magnetic gear compound motor 300. For example, it can be made of ferromagnetic material, silicon steel material, etc., which is not limited in the embodiment of the present disclosure.

[0076] The plurality of stator coils 12 are located on one side of the stator yoke 11 and connected to the stator yoke 11, that is, the stator coils 12 are connected to one side of the stator yoke 11. The stator coils 12 may include a stator core and a winding coil. When the winding coil is energized, a magnetic field loop may be formed between the stator coils 12 and the first magnetic steel 22, thereby driving the plurality of first magnetic steels 22 to drive the rotating shaft 21 to rotate radially of the rotating shaft 21.

[0077] The plurality of stator coils 12 may be evenly arranged along the circumference of the stator yoke 11. The number of the plurality of stator coils 12 and the gears may be set according to requirements and in consideration of the number of the plurality of first magnetic steels 22 and the gears, which is not limited in the embodiment of the present disclosure.

[0078] When the magnetic gear compound motor 300 provided by the embodiment of the present disclosure is applied to other equipment, the stator yoke 11 can be fixed on the equipment so that it is fixed and the motor rotor 2 is driven to rotate relatively.

[0079] like Figure 1 As shown, the rotating shaft 21 is located on a side of the stator yoke 11 close to the stator coil 12 and is rotatably connected to the stator yoke 11. That is, the rotating shaft 21 and the stator coil 12 are located on the same side of the stator yoke 11, and the rotating shaft 21 can rotate relative to the stator yoke 11.

[0080] A plurality of first magnetic steels 22 are located on the surface of the rotating shaft 21 opposite to the plurality of stator coils 12, and the surface of the rotating shaft 21 opposite to the plurality of stator coils 12 is perpendicular to the axis of the rotating shaft, so that the driving motor part composed of the motor stator 1 and the motor rotor 2 is configured as a disc motor structure, thereby reducing the radial dimension of the magnetic gear compound motor 300, and being more suitable for equipment with a smaller radial dimension of the installation space.

[0081] In a possible implementation, the rotational connection between the rotating shaft 21 and the stator yoke 11 may be as follows:

[0082] like Figure 1 and Figure 3 As shown, the stator yoke 11 has a first annular protrusion 111 on one side close to the rotating shaft 21 , and the plurality of stator coils 12 are located outside the first annular protrusion 111 .

[0083] The first annular protrusion 111 can be coaxially arranged with the stator yoke 11, and the end face of one end of the first annular protrusion 111 is connected to one side of the stator yoke 11, and the other end of the first annular protrusion 111 extends in a direction away from the stator yoke 11, and a plurality of stator coils 12 are evenly arranged along the circumference of the outer side of the first annular protrusion 111, that is, a plurality of stator coils 12 are evenly arranged around the first annular protrusion 111.

[0084] like Figure 1 and Figure 2 As shown, the surface of the rotating shaft 21 opposite to the multiple stator coils 12 has a cylindrical protrusion 211, and one end of the cylindrical protrusion 211 close to the stator yoke 11 is located in the first annular protrusion 111. The cylindrical protrusion 211 can be coaxially arranged with the rotating shaft 21, and the end surface of one end of the cylindrical protrusion 211 is connected to the surface of the rotating shaft 21 opposite to the multiple stator coils 12, and the other end of the cylindrical protrusion 211 extends in a direction away from the surface until it is inserted into the first annular protrusion 111.

[0085] The magnetic gear compound motor 300 further includes a first bearing 10, which includes an inner ring and an outer ring, and the inner ring and the outer ring are rotatably connected. The inner ring of the first bearing 10 is connected to the outer side wall of the cylindrical protrusion 211, and the outer ring of the first bearing 10 is connected to the inner side wall of the first annular protrusion 111, so that the rotatable connection between the cylindrical protrusion 211 and the first annular protrusion 111 is realized through the first bearing 10, and then the rotatable connection between the rotating shaft 21 and the stator yoke 11 is realized.

[0086] In the embodiments of the present disclosure, the rotational connection structure between the rotating shaft 21 and the stator yoke 11 can also be any other reasonable structure. For example, the rotating shaft 21 has a first annular protrusion on the surface opposite to the multiple stator coils 12, and the stator yoke 11 has a cylindrical protrusion on the side close to the rotating shaft 21, and the end of the cylindrical protrusion close to the rotating shaft 21 is located in the first annular protrusion, and the cylindrical protrusion is rotationally connected to the first annular protrusion through a first bearing, thereby realizing the rotational connection between the rotating shaft 21 and the stator yoke 11, etc. The embodiments of the present disclosure are not limited to this.

[0087] In a possible implementation, the driving motor part of the magnetic gear compound motor 300 provided in the embodiment of the present disclosure may be as follows: Figure 1 The single-disc disc motor shown can also be provided with a second motor rotor to form a multi-disc disc motor, and its structure is as follows: the second motor rotor includes a second rotating shaft and a plurality of fourth magnetic steels, the second rotating shaft and the plurality of fourth magnetic steels are both located on the side of the stator yoke 11 away from the rotating shaft 21, the second rotating shaft is rotationally connected to the stator yoke 11, the second rotating shaft is coaxial with the rotating shaft 21 and is fixedly connected to the rotating shaft 21, the plurality of fourth magnetic steels are located on the surface of the second rotating shaft opposite to the plurality of stator coils 12, and the surface of the second rotating shaft opposite to the plurality of stator coils 12 is perpendicular to the axis of the second rotating shaft.

[0088] In this way, when the motor stator 1 is energized, the motor stator 1 can drive the motor rotor 2 and the second motor rotor to rotate simultaneously, thereby increasing the torque output range of the rotating shaft 21, and further increasing the torque output range of the magnetic adjustment ring 4 in the magnetic gear compound motor 300, thereby improving the overall performance of the magnetic gear compound motor 300 and expanding the application range of the magnetic gear compound motor 300.

[0089] The second structural design of the drive motor part

[0090] like Figure 4 As shown, the magnetic gear compound motor 300 further includes an end cover 6 , which may have a disc structure.

[0091] The motor stator 1 includes a stator yoke 11 and a plurality of stator coils 12 . The stator yoke 11 has a circular ring structure. One end of the stator yoke 11 is connected to the end cover 6 . The plurality of stator coils 12 are located inside the stator yoke 11 and connected to the stator yoke 11 .

[0092] Among them, the stator yoke 11 can be coaxial with the end cover 6, and the multiple stator coils 12 and the stator yoke 11 are located on the same side of the end cover 6. The multiple stator coils 12 are evenly arranged along the circumference of the stator yoke 11 and connected to the inner wall of the stator yoke 11. The end face of the stator yoke 11 close to the end cover 6 is connected to the end cover 6.

[0093] One end of the rotating shaft 21 is inserted into the inner side of the stator yoke 11 and is rotatably connected to the end cover 6. That is, the rotating shaft 21 and the stator yoke 11 are both located on the same side of the end cover 6.

[0094] The plurality of first magnetic steels 22 are located on the outer side wall of the rotating shaft 21 and correspond to the positions of the plurality of stator coils 12. The plurality of first magnetic steels 22 may be evenly arranged along the circumference of the rotating shaft 21 and connected to the outer side wall of the rotating shaft 21.

[0095] The outer wall of the rotating shaft 21 for connecting the first magnetic steel 22 is evenly provided with a plurality of mounting grooves along the circumferential direction, and each first magnetic steel 22 can be located in a different mounting groove and connected to the rotating shaft 21. The connection method can be a fixing method such as gluing, which is not limited in the embodiment of the present disclosure.

[0096] In the above-mentioned magnetic gear compound motor 300, the motor stator 1 is annularly arranged on the outside of the motor rotor 2, and the driving motor part composed of the motor stator 1 and the motor rotor 2 is configured as a radial motor structure, thereby reducing the axial size of the magnetic gear compound motor 300, and is more suitable for equipment with a smaller installation space for axial gears, such as applications in hub motors, etc.

[0097] In the embodiment of the present disclosure, there are many possible structural designs for the rotational connection between the magnetic adjustment ring 4 and the rotating shaft 21. Three of them are described below as examples:

[0098] The first structural design of the rotational connection between the magnetic adjustment ring 4 and the rotating shaft 21

[0099] like Figure 2 As described above, a second annular protrusion 212 is provided on the outer wall of the rotating shaft 21 , and the second annular protrusion 212 is located between the first magnetic steel 22 and the magnetic tuning rotor 3 .

[0100] like Figure 1As shown, the magnetic gear compound motor 300 also includes a second bearing 20, and the second bearing 20 includes an inner ring and an outer ring, and the inner ring and the outer ring are rotatably connected. The inner ring of the second bearing 20 is connected to the outer side wall of the second annular protrusion 212, and the outer ring of the second bearing 20 is connected to the end of the magnetic adjustment ring 4 close to the first magnetic steel 22.

[0101] In this way, the second annular protrusion 212 and the magnetic adjustment ring 4 can be rotationally connected through the second bearing 20, and the setting of the second annular protrusion 212 can enable the magnetic adjustment ring 4 to always maintain a relatively stable coaxial setting with the magnetic adjustment rotor 3, thereby improving the overall performance of the magnetic gear compound motor 300.

[0102] Alternatively, the structural design of the rotational connection between the magnetic adjustment ring 4 and the rotating shaft 21 can also be: a second annular protrusion is provided on the inner wall of the magnetic adjustment ring, the second annular protrusion is connected to the outer ring of the second bearing 20, and the inner ring of the second bearing 20 is connected to the outer wall of the rotating shaft 21.

[0103] The structural design of the rotational connection between the magnetic tuning ring 4 and the rotating shaft 21 may also be any other reasonable structural design, which is not limited in the embodiments of the present disclosure.

[0104] Second structural design of the rotational connection between the magnetic adjustment ring 4 and the rotating shaft 21

[0105] like Figure 1 As shown, the magnetic gear compound motor 300 further includes a rotating member 7 , a third bearing 30 and a fourth bearing 40 .

[0106] like Figure 5 As shown, the rotating member 7 includes a first annular portion 71 and a second annular portion 72. The first annular portion 71 is coaxial with the second annular portion 72, and the outer diameter of the first annular portion 71 is greater than the outer diameter of the second annular portion 72. One end of the first annular portion 71 is connected to an end of the magnetic tuning ring 4 away from the first magnetic steel 22, and the other end of the first annular portion 71 is connected to the end face of the second annular portion 72.

[0107] The third bearing 30 includes an inner ring and an outer ring, which are rotatably connected. The inner ring of the third bearing 30 is connected to the outer wall of the second annular portion 72, and the outer ring of the third bearing 30 is connected to the end of the magnetic stator 5 away from the motor stator 1.

[0108] The fourth bearing 40 includes an inner ring and an outer ring, which are rotatably connected. The inner ring of the fourth bearing 40 is connected to the end of the rotating shaft 21 away from the first magnetic steel 22 , and the outer ring of the fourth bearing 40 is connected to the inner side wall of the second annular portion 72 .

[0109] In this way, the second annular portion 72 with a smaller outer diameter is connected to the magnetic tuning ring 4 with a relatively larger outer diameter through the first annular portion 71 with a larger outer diameter, so that the outer diameter of the second annular portion 72 can be set relatively small, and then the outer diameters of the third bearing 30 and the fourth bearing 40 can be made relatively small, thereby reducing the radial size of the magnetic gear compound motor 300 and improving the torque density of the magnetic gear compound motor 300.

[0110] In addition, both ends of the rotating shaft 21 are rotatably supported by the first bearing 10 and the fourth bearing 40 respectively, which improves the coaxiality between the motor stator 1 and the motor rotor 2, and the coaxiality between the magnetic adjustment rotor 3, the magnetic adjustment ring 4 and the magnetic adjustment stator 5, thereby improving the overall performance of the magnetic gear compound motor 300.

[0111] In one possible implementation, the positions of the third bearing 30 and the fourth bearing 40 can be opposite, that is, the middle section of the third bearing 30 is coplanar with the middle section of the fourth bearing 40, and the middle section of the third bearing 30 is a cross-section that is perpendicular to the axis of the third bearing 30 and is equal to the distance between the two opposite end faces of the third bearing 30. Similarly, the middle section of the fourth bearing 40 is a cross-section that is perpendicular to the axis of the fourth bearing 40 and is equal to the distance between the two opposite end faces of the fourth bearing 40.

[0112] In this way, the third bearing 30 and the fourth bearing 40 are aligned in the axial direction of the magnetic gear compound motor 300 , thereby improving the supporting rigidity of the rotor 21 and thus improving the overall performance of the magnetic gear compound motor 300 .

[0113] The third structural design of the rotational connection between the magnetic adjustment ring 4 and the rotating shaft 21

[0114] like Figure 1 As shown, the third type of rotational connection structural design is a combination of the first type of rotational connection structural design between the magnetic adjustment ring 4 and the rotating shaft 21 and the second type of rotational connection structural design between the magnetic adjustment ring 4 and the rotating shaft 21 described above, which will not be described in detail here.

[0115] In the embodiment of the present disclosure, there are many possible structural designs of the magnetic gear part, which are described in more detail below:

[0116] like Figure 6 As shown, the magnetic tuning ring 4 may include an annular support 41 and a plurality of magnetic conductors 42 .

[0117] The annular bracket 41 may be made of any reasonable non-magnetic material, for example, glass fiber reinforced plastic or other composite materials.

[0118] The magnetic conductor 42 may be any reasonable magnetic conductive material, for example, it may be composed of laminated materials such as high magnetic conductive silicon steel sheets or thin iron plates.

[0119] like Figure 1 As shown, the annular support 41 is sleeved on the outer side of the magnetic regulating rotor 3 and is rotatably connected to the rotating shaft 21. The side wall of the annular support 41 has a plurality of through holes 411 distributed along the circumferential direction, and each magnetizer 42 is located in a different through hole 411 and is connected to the annular support 41.

[0120] The inner wall of the annular bracket 41 at one end close to the first magnetic steel 22 can be connected to the outer ring of the second bearing 20, and the end of the annular bracket 41 away from the first magnetic steel 22 can be connected to one end of the first circular portion 71, thereby realizing the rotational connection between the annular bracket 41 and the rotating shaft 21 through the second bearing 20, the rotating part 7 and the fourth bearing 40.

[0121] In one possible implementation, the through hole 411 can be opened at one end along the axial direction of the annular bracket 41 and close to the first annular portion 71. In this way, it is easier to install the magnet 42 into the through hole 411. After the magnets 42 are installed in their respective corresponding through holes 411, the end of the annular bracket 41 away from the first magnetic steel 22 can be connected to the first annular portion 71, and the opening of the through hole 411 can be blocked by the first annular portion 71, thereby fixing the magnet 42.

[0122] Of course, the through hole 411 may not be open at one end along the axial direction of the annular bracket 41 and close to the first annular portion 71 , and a snap-fit ​​connection may be provided between the magnetic conductor 42 and the annular bracket 41 , etc. This is not limited in the embodiments of the present disclosure.

[0123] like Figure 7 As shown, the magnetic tuning stator 5 may include an annular stator housing 51 and a plurality of second magnetic steels 52 .

[0124] The annular stator housing 51 is sleeved on the outside of the annular bracket 41 and is connected to the motor stator 1 .

[0125] In such Figure 1 In the magnetic gear compound motor 300 shown, a cavity can be formed between the annular stator housing 51, the stator yoke 11 and the rotating member 7, and the stator coil 12, the rotating shaft 21, the first magnetic steel 22, the magnetic adjustment rotor 3, and the magnetic adjustment ring 4 are all located in the cavity, which plays a protective role for these components.

[0126] In such Figure 4 In the magnetic gear compound motor 300 shown, a cavity can be formed between the annular stator housing 51, the end cover 6 and the rotating part 7, and the stator yoke 11, the stator coil 12, the rotating shaft 21, the first magnetic steel 22, the magnetic adjustment rotor 3, and the magnetic adjustment ring 4 are all located in the cavity, which protects these components.

[0127] The plurality of second magnetic steels 52 are located between the annular stator housing 51 and the annular bracket 41 and connected to the annular stator housing 51. The plurality of second magnetic steels 52 may be evenly arranged along the circumference of the annular stator housing 51 and connected to the inner side wall of the annular stator housing 51.

[0128] The number and size of the plurality of second magnetic steels 52 can be set according to demand and in comprehensive consideration of the structures of the magnetic tuning ring 4 and the magnetic tuning rotor 3 , and the embodiment of the present disclosure does not limit this.

[0129] The positions of the magnetic adjustment rotor 3, the multiple magnetizers 42 and the multiple second magnetic steels 52 correspond to each other, the multiple magnetizers 42 are sleeved on the outside of the magnetic adjustment rotor 3, and the multiple second magnetic steels 52 are sleeved on the outside of the multiple magnetizers 42. When the magnetic adjustment rotor 3 rotates rapidly along with the rotating shaft 21, under the action of the magnetic field loop generated by the magnetic adjustment rotor 3 and the multiple second magnetic steels 52, the multiple magnetizers 42 are subjected to the radial force along the annular bracket 41, driving the magnetizers 42 and the annular bracket 41 to rotate slowly, thereby realizing the low-speed torque output of the magnetic gear compound motor 300.

[0130] In a possible implementation, when the entire shaft 21 is made of magnetic conductive material, the magnetically adjustable rotor 3 may only include a plurality of third magnetic steels 32 , and the shaft 21 may enhance the magnetic field strength between the second magnetic steels 52 and the third magnetic steels 32 , thereby improving the overall performance of the magnetic gear compound motor 300 .

[0131] In one possible implementation, Figure 8 As shown, the magnetically adjustable rotor 3 may include a magnetic conductive ring 31 and a plurality of third magnetic steels 32 .

[0132] The magnetic conductive ring 31 is sleeved on the outer side of the rotating shaft 21 and connected to the rotating shaft 21. The magnetic conductive ring 31 can be made of any magnetic conductive material, for example, silicon steel material, ferromagnetic material, etc.

[0133] The outer wall of the magnetic ring 31 has multiple grooves 311 distributed along the circumferential direction. Each third magnetic steel 32 is located in a different groove 311 and is connected to the magnetic ring 31. The positions of the multiple third magnetic steels 32, the multiple magnetic conductors 42 and the multiple second magnetic steels 52 correspond to each other.

[0134] In this way, no matter whether the entire rotating shaft 21 is made of magnetic conductive material, the magnetic conductive ring 31 can enhance the magnetic field strength between the second magnetic steel 52 and the third magnetic steel 32 , thereby improving the overall performance of the magnetic gear compound motor 300 .

[0135] It should be noted that the opposite sides of the magnetizer 42 are respectively arranged opposite to the magnetic adjustment rotor 3 and the second magnetic steel 52, that is, the gap between the magnetizer 42 and the magnetic adjustment rotor 3 is small, and no other components are arranged between the two. Similarly, the gap between the magnetizer 42 and the second magnetic steel 52 is small, and no other components are arranged between the two.

[0136] The present disclosure provides a wheel, such as Fig. 9 As shown, the wheel includes a housing 100, a rubber-coated wheel 200 and any one of the above-mentioned magnetic gear compound motors 300.

[0137] The housing 100 has a cylindrical structure, the rubber-coated wheel 200 has a circular ring structure, and the inner wall of the rubber-coated wheel 200 is connected to the outer wall of the housing 100. The magnetic gear compound motor 300 is located in the housing 100, and the magnetic adjustment ring 4 is connected to the housing 100.

[0138] The housing 100 protects the magnetic gear compound motor 300 , and the housing 100 and the magnetic gear compound motor 300 form a wheel hub, which supports the rubber-coated wheel 200 .

[0139] The motor stator 1 in the magnetic gear compound motor 300 can be fixedly connected to the vehicle frame. When the magnetic adjustment ring 4 in the magnetic gear compound motor 300 rotates at a low speed, the housing 100 and the rubber-coated wheel 200 can be driven to rotate at a low speed, thereby realizing the rotation of the wheel.

[0140] In one possible implementation, Fig. 9 As shown, the housing 100 may include a cover plate and a side plate, the cover plate is located on the side of the rotating member 7 away from the magnetic adjustment ring 4 and is connected to the second annular portion 72, the side plate surrounds the outer side of the annular stator housing 51, and one end of the side plate is connected to the cover plate. In this way, the housing 100 not only protects the magnetic gear compound motor, but also can realize low-speed rotation along with the magnetic adjustment ring 4.

[0141] In a possible implementation, one end of the side plate away from the cover plate can be rotatably sealed with the outer side wall of the annular stator housing 51, thereby providing sealing protection for the magnetic gear compound motor.

[0142] The technical solution provided by the embodiments of the present disclosure includes at least the following beneficial effects:

[0143] The embodiment of the present disclosure provides a magnetic gear compound motor 300, wherein the driving motor part includes a motor stator 1 and a plurality of first magnetic steels 22, and the magnetic gear part includes a magnetic adjustment rotor 3, a magnetic adjustment ring 4 and a magnetic adjustment stator 5. The driving motor part and the magnetic gear part are decoupled in electromagnetic design, and the two can be designed separately and independently, thereby improving the flexibility of the motor structure design.

[0144] The term "at least one" in this application means one or more, and the term "plurality" in this application means two or more.

[0145] In the present application, the terms "first" and "second" are used to distinguish between identical or similar items with substantially the same effects and functions. It should be understood that there is no logical or temporal dependency between "first" and "second", nor is the quantity and execution order limited. It should also be understood that although the following description uses the terms "first" and "second" to describe various structures, these structures should not be limited by the terms. These terms are only used to distinguish one structure from another. For example, without departing from the scope of various examples, the first annular portion can be referred to as the second annular portion, and similarly, the second annular portion can be referred to as the first annular portion.

[0146] The above are only optional embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A magnetic gear compound motor, characterized in that: The magnetic gear composite motor comprises a motor stator (1), a motor rotor (2), a magnetic adjustment rotor (3), a magnetic adjustment ring (4) and a magnetic adjustment stator (5); The motor rotor (2) comprises a rotating shaft (21) and a plurality of first magnetic steels (22), the rotating shaft (21) being rotatably connected to the motor stator (1), and the plurality of first magnetic steels (22) being located on a surface of the rotating shaft (21) opposite to the motor stator (1) and connected to the rotating shaft (21); The magnetically adjustable rotor (3) is sleeved on the outside of the rotating shaft (21) and is connected to the rotating shaft (21); The magnetic adjustment ring (4) is sleeved on the outside of the magnetic adjustment rotor (3) and is rotatably connected to the rotating shaft (21); The magnetic adjustment stator (5) is sleeved on the outside of the magnetic adjustment ring (4) and is connected to the motor stator (1).

2. The magnetic gear compound motor according to claim 1, characterized in that: The motor stator (1) comprises a stator yoke (11) and a plurality of stator coils (12), wherein the stator yoke (11) has a disc structure, and the plurality of stator coils (12) are connected to one side of the stator yoke (11); The rotating shaft (21) is located on a side of the stator yoke (11) close to the stator coil (12) and is rotatably connected to the stator yoke (11); the plurality of first magnetic steels (22) are located on a surface of the rotating shaft (21) opposite to the plurality of stator coils (12), and the surface is perpendicular to the axis of the rotating shaft.

3. The magnetic gear compound motor according to claim 2, characterized in that: The magnetic gear compound motor also includes a first bearing (10); The stator yoke (11) has a first annular protrusion (111) on one side close to the rotating shaft (21), and the plurality of stator coils (12) are located outside the first annular protrusion (111); A cylindrical protrusion (211) is provided on the surface, and an end of the cylindrical protrusion (211) close to the stator yoke (11) is located in the first annular protrusion (111); The inner ring of the first bearing (10) is connected to the outer side wall of the cylindrical protrusion (211), and the outer ring of the first bearing (10) is connected to the inner side wall of the first annular protrusion (111).

4. The magnetic gear compound motor according to claim 1, characterized in that: The magnetic gear compound motor also includes an end cover (6); The motor stator (1) comprises a stator yoke (11) and a plurality of stator coils (12); the stator yoke (11) has a circular ring structure; one end of the stator yoke (11) is connected to the end cover (6); and the plurality of stator coils (12) are located on the inner side of the stator yoke (11) and are connected to the stator yoke (11); One end of the rotating shaft (21) is inserted into the inner side of the stator yoke (11) and is rotatably connected to the end cover (6); the plurality of first magnetic steels (22) are located on the outer side wall of the rotating shaft (21) and correspond to the positions of the plurality of stator coils (12).

5. The magnetic gear compound motor according to claim 1, characterized in that: The magnetic gear compound motor also includes a second bearing (20); A second annular protrusion (212) is provided on the outer side wall of the rotating shaft (21), and the second annular protrusion (212) is located between the first magnetic steel (22) and the magnetically adjustable rotor (3); The inner ring of the second bearing (20) is connected to the outer side wall of the second annular protrusion (212), and the outer ring of the second bearing (20) is connected to an end of the magnetic adjustment ring (4) close to the first magnetic steel (22).

6. The magnetic gear compound motor according to claim 1, characterized in that: The magnetic gear compound motor also includes a rotating member (7), a third bearing (30) and a fourth bearing (40); The rotating member (7) comprises a first annular portion (71) and a second annular portion (72), the first annular portion (71) and the second annular portion (72) being coaxial, and the outer diameter of the first annular portion (71) is greater than the outer diameter of the second annular portion (72), one end of the first annular portion (71) is connected to an end of the magnetic adjustment ring (4) away from the first magnetic steel (22), and the other end of the first annular portion (71) is connected to an end surface of the second annular portion (72); The inner ring of the third bearing (30) is connected to the outer side wall of the second annular portion (72), and the outer ring of the third bearing (30) is connected to an end of the magnetic modulation stator (5) away from the motor stator (1); The inner ring of the fourth bearing (40) is connected to an end of the rotating shaft (21) away from the first magnetic steel (22), and the outer ring of the fourth bearing (40) is connected to the inner side wall of the second annular portion (72).

7. The magnetic gear compound motor according to claim 6, characterized in that: The third bearing (30) and the fourth bearing (40) are located opposite to each other.

8. The magnetic gear compound motor according to claim 1, characterized in that: The magnetic adjustment ring (4) comprises an annular support (41) and a plurality of magnetic conductors (42); the annular support (41) is sleeved on the outside of the magnetic adjustment rotor (3) and is rotatably connected to the rotating shaft (21); the side wall of the annular support (41) has a plurality of through holes (411) distributed along the circumferential direction; each magnetic conductor (42) is located in a different through hole (411) and is connected to the annular support (41); The magnetically adjustable stator (5) comprises an annular stator housing (51) and a plurality of second magnetic steels (52); the annular stator housing (51) is sleeved on the outside of the annular support (41) and is connected to the motor stator (1); the plurality of second magnetic steels (52) are located between the annular stator housing (51) and the annular support (41) and are connected to the annular stator housing (51); The positions of the magnetically adjustable rotor (3), the plurality of magnetic conductors (42) and the plurality of second magnetic steels (52) correspond to each other.

9. The magnetic gear compound motor according to claim 8, characterized in that: The magnetically adjustable rotor (3) comprises a magnetic conductive ring (31) and a plurality of third magnetic steels (32); The magnetic conductive ring (31) is sleeved on the outside of the rotating shaft (21) and is connected to the rotating shaft (21); the outer wall of the magnetic conductive ring (31) has a plurality of grooves (311) distributed along the circumferential direction; Each third magnetic steel (32) is located in a different groove (311) and is connected to the magnetic conductive ring (31), and the positions of the plurality of third magnetic steels (32), the plurality of magnetic conductive bodies (42) and the plurality of second magnetic steels (52) correspond to each other.

10. A wheel, characterized in that: The wheel comprises a shell (100), a rubber-coated wheel (200), and a magnetic gear compound motor (300) according to any one of claims 1 to 9; The housing (100) has a cylindrical structure; The rubber-coated wheel (200) has a circular ring structure, and the inner wall of the rubber-coated wheel (200) is connected to the outer wall of the shell (100); The magnetic gear compound motor (300) is located in the housing (100), and the magnetic adjustment ring (4) is connected to the housing (100).

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