Motor assembly and fan

Abstract

The utility model provides a motor assembly and a fan, and the motor assembly comprises a driving motor which comprises a first output shaft; the magnetic gear comprises a driving rotor, a driven rotor and a magnetism adjusting ring, the driving rotor and the driven rotor are located on the two opposite sides of the magnetism adjusting ring respectively, the driving rotor is installed on the first output shaft, and the driven rotor can rotate under the action of the driving rotor; the driven rotor comprises a second output shaft which is installed on the first output shaft and can rotate relative to the first output shaft. When the first output shaft rotates, the second output shaft can reversely rotate relative to the first output shaft. According to the motor assembly, opposite driving force can be output through the first output shaft and the second output shaft, so that a counter-rotating motor is formed. Meanwhile, according to the counter-rotating motor, the cost of the motor assembly is reduced, the structure of the motor assembly is simplified, and the counter-rotating motor has the advantages of being free of mechanical friction, small in vibration, low in noise, capable of preventing overload and the like.

Description

[0001] The applicant claims priority to the Chinese patent application No. 202423323527.6, filed on December 31, 2024, and entitled "Motor assembly and fan", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of household appliances, in particular to a motor assembly and a fan. BACKGROUND

[0003] In related solutions, the contra-rotating motor generally includes two forms. One adopts double motors. This kind of motor has high cost due to the use of two sets of motors and driving systems. The other adopts a gear mechanism, which derives a second functional shaft. However, mechanical noise is generated due to the mechanical engagement of the gear, resulting in a poor user experience of the product.

[0004] Therefore, how to design a motor assembly that can simultaneously output two different performances by using one motor without mechanical gear engagement noise has become a problem to be solved. SUMMARY

[0005] The present application aims to at least solve the problems of high cost and large mechanical noise of the contra-rotating motor in the prior art or related art.

[0006] Therefore, the first purpose of the present application is to provide a motor assembly.

[0007] The second purpose of the present application is to provide a fan.

[0008] To achieve the above purpose, the technical solution of the first aspect of the present application provides a motor assembly, comprising: a driving motor comprising a first output shaft; a magnetic gear comprising a driving rotor and a driven rotor and a magnetic adjusting ring, the driving rotor and the driven rotor are respectively located on the two sides of the magnetic adjusting ring oppositely arranged, and the driving rotor is installed on the first output shaft, the driven rotor can rotate under the action of the driving rotor; the driven rotor comprises a second output shaft, which is installed on the first output shaft and can rotate relative to the first output shaft; wherein the first output shaft rotates, and the second output shaft can rotate reversely relative to the first output shaft.

[0009] The utility model discloses a motor assembly, including drive motor and magnetic gear. Among them, drive motor, magnetic gear and the second output shaft of driven rotor can assemble and form a contra-rotating motor. This kind of contra-rotating motor has two output ends of opposite rotation direction, can drive two parts to rotate in opposite directions. Specifically, the magnetic gear includes the driving rotor installed on the first output shaft of drive motor, and the driving rotor can rotate with the first output shaft. The magnetic gear further includes the driven rotor installed corresponding to the driving rotor and the magnetic ring arranged between the driving rotor and the driven rotor. Among them, the magnetic ring is used for adjusting the magnetic circuit between the driving rotor and the driven rotor, so that when the driving rotor rotates with the first output shaft, the driven rotor can be driven to rotate reversely through the magnetic ring through the magnetic force, so as to drive the second output shaft of the driven rotor to rotate reversely, so that the power output of the driven rotor can be output through the second output shaft. This kind of motor assembly can output opposite driving force through the first output shaft and the second output shaft, thereby forming a contra-rotating motor. But this kind of contra-rotating motor only needs to set up a motor, therefore, not only reduces the cost of motor assembly, also simplifies the structure of motor assembly, reduces the volume of motor assembly. In addition, this kind of motor assembly adopts the magnetic gear, and therefore, it also has the advantages of no mechanical friction, small vibration, low noise, overload protection and the like. In addition, since the second output shaft is supported and installed on the first output shaft, and the rotation center of the first output shaft and the rotation center of the second output shaft are parallel to each other, the concentricity of the first output shaft and the second output shaft is ensured, the stability of the motor system is improved, and the installation of the second output shaft is facilitated.

[0010] In any of the above technical solutions, optionally, the drive motor further includes a motor body, at least a portion of the first output shaft is installed in the motor body, and the first output shaft includes a first output end and a second output end respectively extending from two opposite sides of the motor body; the second output shaft and the driving rotor are installed on the second output end.

[0011] In this technical solution, the two ends of the first output shaft respectively extend from the two sides of the motor body, thereby forming two output ends. Among them, one output end is used for installing one of the power elements (such as the first fan blade), and the other output end is used for installing the driving rotor and the second output shaft. This kind of scheme can form an output end on each side of the motor, thereby making the structure of the whole fan more stable.

[0012] In any of the above technical solutions, optionally, the drive motor further includes a motor body, at least a portion of the first output shaft is installed in the motor body, and the first output shaft includes a third output end extending from one side of the motor body; at least a portion of the second output shaft is installed outside the third output end.

[0013] In the technical scheme, one end of the first output shaft extends from one side of the motor body to form a third output end, and at least part of the second output shaft is mounted outside the third output end, so that the first fan blade and the second fan blade can be mounted on the same side of the motor body, thereby increasing the air volume.

[0014] In any of the above technical schemes, optionally, at least part of the second output shaft is sleeved outside the first output shaft, so as to ensure the coaxial mounting degree of the first output shaft and the second output shaft.

[0015] In any of the above technical schemes, optionally, the fan further comprises one or more bearings mounted on the first output shaft, and a rotating hole is arranged on the second output shaft, and the second output shaft is sleeved and mounted on the one or more bearings through the rotating hole.

[0016] In the technical scheme, the second output shaft is in a hollow structure, and the hollow structure forms a rotating hole. One or more bearings are arranged between the second output shaft and the first output shaft, and the second output shaft is mounted on the first output shaft through the bearings, and the second output shaft can rotate relative to the first output shaft, so that the second output shaft is rotatably mounted on the first output shaft. In addition, the second output shaft can also be mounted without the support of the first output shaft, but in order to ensure the coaxiality, at least part of the first output shaft can be inserted into the second output shaft.

[0017] Optionally, the number of bearings is 2, and the two bearings are arranged in an axial direction of the first output shaft. This arrangement can make the mounting stability of the second output shaft better and avoid the shaking of the second output shaft.

[0018] In any of the above technical schemes, optionally, the second output shaft comprises a support sleeve mounted on the first output shaft and capable of rotating relative to the first output shaft, and a mounting portion connected with the support sleeve, at least part of the driving rotor and the mounting portion are respectively located on two sides of the magnetic adjusting ring, and the driven rotor is mounted on a portion of the mounting portion corresponding to the driving rotor.

[0019] In the technical scheme, the second output shaft comprises two parts, one part is a support sleeve which is similar to a shaft sleeve and is used for sleeved mounting on the first output shaft, and the other part is used for mounting the driven rotor so that the driven rotor and the driving rotor can be arranged on two sides of the magnetic adjusting ring. The support sleeve and the mounting portion are in an integrated structure, so as to ensure the connection strength.

[0020] Optionally, the support sleeve and the mounting portion are integrally formed.

[0021] In any of the above technical solutions, optionally, the motor assembly further comprises: a mounting bracket, the driving motor and the magnetic adjusting ring are mounted on the mounting bracket; the driving motor further comprises a motor body, at least part of the first output shaft is mounted in the motor body, and at least part of the first output shaft extends from the motor body; wherein the motor body and the magnetic gear are located on the same side of the mounting bracket, or the motor body and the magnetic gear are located on the two opposite sides of the mounting bracket respectively.

[0022] In this technical solution, the mounting bracket is used to form a mounting platform to realize the installation of parts such as the driving motor and the magnetic adjusting ring. Among them, the motor body and the magnetic gear can be installed on the same side of the mounting bracket during installation. At the same time, the motor body and the magnetic gear can also be installed on the two sides of the mounting bracket during installation, which can simplify the structure of the whole fan.

[0023] In any of the above technical solutions, optionally, the first output shaft comprises: a first shaft section, a second shaft section and a third shaft section connected to each other in sequence, the diameters of the first shaft section, the second shaft section and the third shaft section increase in sequence; wherein the driving rotor is mounted on the second shaft section, the second output shaft is mounted on the first shaft section, and the third shaft section is located in the motor body.

[0024] In this technical solution, the first output shaft of the motor is an integral structure, which can include three parts according to the size of the diameter, specifically, the first shaft section, the second shaft section and the third shaft section. Among them, the driving rotor is mounted on the second shaft section, the second output shaft is mounted on the first shaft section, and the third shaft section is located in the motor body. The purpose of different diameters of each part is to make the assembly of parts such as the motor, the rotor and the bearing more convenient, and the stepped position is formed at the segmented part with different diameters. Through the stepped position, the axial limiting effect of the assembled parts can be achieved.

[0025] In any of the above technical solutions, optionally, the first output shaft further comprises a fourth shaft section connected to the side of the third shaft section away from the second shaft section and extending from the side of the motor body away from the second shaft section, and the fourth shaft section forms an output end.

[0026] In this technical solution, the first output shaft further comprises a fourth shaft section. The fourth shaft section is used to mount the first fan blade and the like. Among them, the diameter of the fourth shaft section can be greater than or equal to the diameter of the third shaft section, or less than the diameter of the third shaft section.

[0027] In any of the above technical solutions, optionally, the difference between the diameter of the second shaft section and the diameter of the first shaft section is greater than or equal to 0.5mm and less than or equal to 2mm, and / or the difference between the diameter of the third shaft section and the diameter of the second shaft section is greater than or equal to 0.5mm and less than or equal to 2mm.

[0028] In this technical solution, the three diameters of the shaft are D1, D2, and D3, where D1 < D2 < D3, and 0.5mm ≤ D2 - D1 ≤ 2mm. When D2 - D1 < 0.5mm, the machining is difficult, and the small diameter difference results in an excessively small step on the shaft, affecting its axial limiting function. When D2 - D1 > 2mm, the machining difficulty increases, leading to increased machining costs. Similarly, 0.5mm ≤ D3 - D2 ≤ 2mm. When D3 - D2 < 0.5mm, the machining is difficult, and the small diameter difference results in an excessively small step on the bearing, affecting its axial limiting function. When D3 - D2 > 2mm, the machining difficulty increases, leading to increased machining costs.

[0029] In any of the above technical solutions, optionally, the magnetic adjustment ring includes: a mounting ring; a plurality of magnetic adjustment teeth, which are spaced apart on the mounting ring along a first circumferential direction, and a magnetic isolation hole is formed between two adjacent magnetic adjustment teeth, the mounting ring being located at one end of the plurality of magnetic adjustment teeth along the length direction; a connecting ring, which is connected to the end of the plurality of magnetic adjustment teeth away from the mounting ring, and the connecting ring and the mounting ring are spaced apart along the length direction; wherein, a magnetic isolation groove is provided on one or both ends of the magnetic adjustment teeth along the length direction.

[0030] In this technical solution, the adjusting ring includes a mounting ring and multiple adjusting teeth. Magnetic isolation holes are formed between the multiple adjusting teeth. The adjusting teeth are magnetically conductive, guiding the magnetic circuit between the driven rotor and the driving rotor, thus enabling them to rotate in opposite directions. Furthermore, the mounting ring is located at one end of the multiple adjusting teeth along their length; that is, the mounting ring only connects one end of the multiple adjusting teeth along their length, meaning that most of the length of the multiple adjusting teeth is unconnected. This creates relatively large magnetic isolation holes between the multiple adjusting teeth, effectively preventing magnetic leakage and improving the magnetic moment transmission effect between the driven rotor and the driving rotor. Therefore, when the adjusting ring is used in magnetic gears, it can improve the load capacity of the magnetic gears and reduce the risk of the magnetic gears losing synchronization.

[0031] Furthermore, by setting up magnetic isolation grooves, the leakage magnetic flux at both ends of the adjusting gear along the radial direction can be reduced, thereby further improving the magnetic moment transmission effect between the driven rotor and the driving rotor. Thus, when the adjusting ring is used in a magnetic gear, the load capacity of the magnetic gear can be further improved, and the risk of the magnetic gear losing synchronization can be reduced.

[0032] Meanwhile, since the magnetic isolation groove is located relatively close to the end, the structural strength of the magnetic adjustment ring at the end is relatively weak. In order to increase the wall thickness of the magnetic adjustment teeth at the end, a chamfer can be set at the connection of the two sides of the magnetic isolation groove near the end. This can appropriately increase the thickness of the magnetic isolation groove near the end, thereby improving the structural strength of the magnetic adjustment ring.

[0033] Further, the mounting ring is hollow in the middle, so the magnetic field can be further prevented from leaking through the mounting ring.

[0034] Further, the plurality of magnetic adjustment teeth are connected by the mounting ring and the connecting ring at two ends along the length direction, so that the strength of the magnetic adjustment ring can be ensured, and the magnetic adjustment teeth can be prevented from deforming during operation. Meanwhile, the mounting ring and the connecting ring make the structure of the magnetic adjustment ring simple, and the magnetic isolation effect of the magnetic adjustment ring can be improved, and the magnetic leakage of the magnetic adjustment ring based on the mounting structure at the two ends can be prevented.

[0035] In any of the above technical solutions, optionally, the magnetic adjustment teeth comprise two end portions arranged along the length direction, and the magnetic isolation groove is provided with a chamfer, and the chamfer is arranged at the side of the magnetic isolation groove close to the end portion, and one end or both ends of the magnetic isolation groove distributed along the first circumferential direction are provided with the chamfer.

[0036] In the technical solution, the magnetic isolation groove is arranged close to the end portion, so that the structural strength of the magnetic adjustment ring at the end portion is weak. In order to increase the wall thickness of the magnetic adjustment teeth at the end portion, the chamfer can be arranged at the connection of the two sides of the side of the magnetic isolation groove close to the end portion, so that the thickness of the side of the magnetic isolation groove close to the end portion can be appropriately increased, and the structural strength of the magnetic adjustment ring can be improved.

[0037] Further, one end or both ends of the magnetic isolation groove distributed along the first circumferential direction are provided with the chamfer. That is, the side of the magnetic isolation groove close to the end portion can be provided with only one chamfer for single-sided structural reinforcement, or can be provided with two chamfers for double-sided structural reinforcement.

[0038] In any of the above technical solutions, optionally, the number of poles of the driving rotor is P1, and the number of poles of the driven rotor is P2, wherein: P1 and P2 are both even numbers, and P1 is less than P2, and / or 0.3≤P2 / P1≤3.

[0039] In the technical solution, the number of poles of the driving rotor is P1, and the number of poles of the driven rotor is P2, and P1 and P2 are both even numbers. P1 should be less than P2, the transmission ratio of the magnetic gear is i, i=P2 / P1. The transmission ratio is 0.3≤i≤3. When i is less than 0.3, there is a risk of out-of-step at high speed, that is, the driven rotor does not rotate relative to the driving rotor at the original transmission ratio i; when i is greater than 3, the magnetic transmission efficiency is low, that is, the load capacity of the magnetic gear is reduced, and there is a risk of out-of-step at high speed. Therefore, by setting the transmission ratio i in the range of 0.3-3, the risk of out-of-step at high speed can be reduced, the magnetic transmission efficiency can be ensured, and the load capacity of the magnetic gear can be enhanced.

[0040] Optionally, the transmission ratio i is set in the range of 1.1-3.

[0041] In the technical solution, the driving rotor and the driven rotor are respectively located on two sides of the magnetic adjusting ring in a radial direction, so that a radial magnetic gear is formed.

[0042] In any of the above technical solutions, the distance between the magnetic adjusting ring and the driving rotor and / or the driven rotor along the length direction of the magnetic adjusting tooth is G, wherein 0.5mm≤G≤4mm.

[0043] When G is less than 0.5mm, the rotor and the magnetic adjusting ring are prone to interference friction due to installation error and machining error, causing noise; when G is greater than 4mm, the magnetic transmission efficiency is greatly reduced, thereby affecting the efficiency of the magnetic transmission and causing the driven shaft to lose synchronization.

[0044] When the driving rotor and the driven rotor are arranged in a radial direction of the magnetic adjusting ring, the distance G between the magnetic adjusting ring and the driving rotor and / or the driven rotor in the radial direction is greater than or equal to 0.5mm and less than or equal to 4mm.

[0045] In the technical solution, the driving rotor and the driven rotor are respectively located on two sides of the magnetic adjusting ring in a radial direction, so that a radial magnetic gear is formed.

[0046] The driving rotor and the driven rotor are magnetized in a direction corresponding to the magnetization direction.

[0047] The second aspect of the technical solution of the utility model provides a fan, including the motor assembly provided by any of the first aspect technical solutions.

[0048] The fan provided by the utility model has all the beneficial effects of the motor assembly provided by any of the first aspect technical solutions.

[0049] In the technical solution, the fan further comprises: a first fan blade mounted on the first output shaft and capable of rotating under the action of the first output shaft; and a second fan blade connected with the second output shaft and capable of rotating with the second output shaft.

[0050] In the technical solution, the first fan blade is mounted on the first output shaft and can rotate with the first output shaft, and the second fan blade is connected with the second output shaft and can rotate with the second output shaft in the direction opposite to the rotation direction of the first fan blade, so that the first fan blade and the second fan blade can rotate in opposite directions, thereby forming the counter-rotating fan with two fan blades capable of rotating in opposite directions. Meanwhile, since the first output shaft and the second output shaft are coaxially arranged, the stability of system operation is improved, and since the first fan blade and the second fan blade are respectively mounted on the first output shaft and the second output shaft, the first fan blade and the second fan blade can be concentrically arranged, thereby making the air flow generated by the two fan blades more stable, reducing vortex and noise.

[0051] In the fan, since two fan blades with different rotation directions are included, soft, comfortable and variable wind types can be output, and noise can be reduced through the interaction of the two fan blades. In addition, since only one motor needs to be arranged, the cost of the fan is reduced, the structure of the fan is simplified, and the size of the fan is reduced. In addition, since the magnetic gear is adopted, the fan also has the advantages of no mechanical friction, small vibration, low noise, overload prevention and the like.

[0052] In the fan, the first fan blade and the second fan blade are axial flow fans, so that the air flow generated by the fan blade in front can be exactly reversed and eliminated by the other fan blade, and the axial flow air flow meeting the outlet requirements of the fan is directly generated. Therefore, guide vanes do not need to be arranged for the fan, so that the structure of the fan becomes simple and compact, and the axial size of the whole machine is greatly shortened.

[0053] In addition, the structure can realize different modes of air outlet by adjusting the speed ratio between the driving rotor and the driven rotor. For example, when the speed ratio of the front and rear fan blades is 1:2, the front fan blade can further rub, rub and scatter the air blown out by the rear fan blade, and the finally blown-out air is very soft. When the speed ratio of the front and rear fan blades is 2:1, the rear fan blade assists the front fan blade, so that a very powerful pressurized air flow can be blown out, which is undoubtedly very good for indoor ventilation. When the speed ratio of the front and rear fan blades is 1:1, the two fan blades disturb the air at the same time, so that a large amount of circulating air flow can be realized. At this time, the 360° rotation up, down, left and right can completely realize the function of the circulating fan, and the indoor temperature can be more balanced when the circulating fan is used with the air conditioner.

[0054] In the fan, the first fan blade is located in front of the second fan blade, that is, the first fan blade is designed to be closer to the air outlet side of the fan.

[0055] In any of the above technical solutions, optionally, at least part of the second fan blade is arranged on the radial outer side of the first fan blade, or the second fan blade is located on one side of the first fan blade in the axial direction.

[0056] In the technical solution, at least part of the second fan blade can be arranged at the radial outer side of the first fan blade, or the second fan blade can be arranged at one side of the first fan blade along the axial direction of the first fan blade, so that a larger air volume can be generated under the same rotating speed and power input, and the air exchange efficiency is effectively improved. Meanwhile, the uniformity of the air outlet can be improved.

[0057] In any of the above technical solutions, optionally, the rotating speed of the first fan blade is n1, the rotating speed of the second fan blade is n2, and 0.3≤n2 / n1≤3.

[0058] In the technical solution, by limiting the relationship between the rotating speed of the first fan blade and the rotating speed of the second fan blade, the internal air speed can be improved, and the uniformity of the air outlet can be increased.

[0059] In any of the above technical solutions, optionally, at least part of the second fan blade is arranged at the radial outer side of the first fan blade, and the rotating speed of the second fan blade is less than the rotating speed of the first fan blade.

[0060] In the technical solution, at least part of the second fan blade is arranged at the radial outer side of the first fan blade, and the rotating speed of the second fan blade is less than the rotating speed of the first fan blade, so that the internal air speed can be improved, and the uniformity of the air outlet can be increased.

[0061] In addition, the rotating speeds of the first output shaft and the second output shaft are different. Specifically, the number of teeth and the number of slots of the inner and outer stators and the outer stator are arranged to be different, so that the number of poles of the inner and outer stators is different, and thus the rotating speeds of the inner and outer rotors are different, so that different rotating speeds are formed, thereby meeting the needs of different loads. For example, the number of slots of the outer stator is greater than the number of slots of the inner stator, so that the outer stator can realize low speed and large torque through the multi-slot, and at the same time, the inner stator can realize high speed and small torque through the small number of slots, so that the double-shaft motor can output different rotating speeds, thereby expanding the application scenarios of the motor.

[0062] In any of the above technical solutions, optionally, the fan further comprises: a middle mesh cover, the driving motor is installed on the middle mesh cover; a first mesh cover and a second mesh cover, the first mesh cover and the second mesh cover are fixed on both sides of the middle mesh cover along the axial direction of the first output shaft; wherein the first fan blade is installed in the space surrounded by the first mesh cover and the middle mesh cover, and the magnetic gear and the second fan blade are installed in the space surrounded by the second mesh cover and the middle mesh cover.

[0063] In the technical solution, the middle mesh cover is used for ventilation on one hand, and the installation of the driving motor and the magnetic gear can be realized on the other hand, and meanwhile, the middle mesh cover can form an air duct between the second fan blade and the first fan blade, so that the air blown out by the first fan blade can pass through the second fan blade and then be blown out by the second fan blade.

[0064] The additional aspects and advantages of the present application will become apparent in connection with the description of embodiments herein provided below, or can be understood by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0065] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings in which:

[0066] Figure 1 is one of the structure schematic diagrams of the fan in the embodiment of the present application;

[0067] Figure 2 is one of the structure schematic diagrams of the radial magnetization contrarotating motor in the embodiment of the present application;

[0068] Figure 3 is the second structure schematic diagram of the radial magnetization contrarotating motor in the embodiment of the present application;

[0069] Figure 4 is one of the structure schematic diagrams of the radial magnetization magnetic adjusting ring in the embodiment of the present application;

[0070] Figure 5 is the second structure schematic diagram of the radial magnetization magnetic adjusting ring in the embodiment of the present application;

[0071] Figure 6 is one of the structure schematic diagrams of the axial magnetization contrarotating motor in the embodiment of the present application;

[0072] Figure 7 is the second structure schematic diagram of the axial magnetization contrarotating motor in the embodiment of the present application;

[0073] Figure 8 is one of the structure schematic diagrams of the axial magnetization magnetic adjusting ring in the embodiment of the present application;

[0074] Figure 9 is the second structure schematic diagram of the axial magnetization magnetic adjusting ring in the embodiment of the present application;

[0075] Figure 10 is one of the structure schematic diagrams of the radial magnetization driving rotor and driven rotor in the embodiment of the present application;

[0076] Figure 11 is the second structure schematic diagram of the radial magnetization driving rotor and driven rotor in the embodiment of the present application;

[0077] Figure 12 is the third structure schematic diagram of the radial magnetization driving rotor and driven rotor in the embodiment of the present application;

[0078] Figure 13 This is an assembly diagram of the radially magnetized active rotor and driven rotor in an embodiment of this utility model.

[0079] Figure 14 This is an assembly diagram of the axially magnetized active rotor and driven rotor in an embodiment of this utility model.

[0080] Figure 15 This is one of the assembly diagrams of the first output shaft of the fan in an embodiment of this utility model;

[0081] Figure 16 This is the second assembly diagram of the first output shaft of the fan in an embodiment of this utility model;

[0082] Figure 17 This is the second schematic diagram of the fan structure in an embodiment of this utility model;

[0083] Figure 18 This is the third schematic diagram of the fan structure in an embodiment of this utility model;

[0084] in, Figures 1 to 18 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0085] 10 Magnetic gear, 1 Adjusting magnetic ring, 11 Adjusting magnetic teeth, 12 Magnetic isolation hole, 13 Magnetic isolation groove, 132 Chamfer, 14 Mounting ring, 15 Connecting ring, 2 Driving rotor, 3 Driven rotor, 4 Plate magnet, 5 Circular magnetic guide ring, 20 Drive motor, 202 First output shaft, 2022 First shaft segment, 2024 Second shaft segment, 2026 Third shaft segment, 2028 Fourth shaft segment, 204 Motor body, 30 First fan blade, 40 Second fan blade, 50 Second output shaft, 502 Support sleeve, 504 Mounting part, 60 Mounting bracket, 70 Middle mesh cover, 80 First mesh cover, 90 Second mesh cover. Detailed Implementation

[0086] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0087] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0088] The following reference Figures 1 to 18 This application describes the fan assembly and fan provided in the embodiments of this application.

[0089] As Figure 2 , Figure 3 , Figure 6 and Figure 7 indicate, the utility model discives a motor assembly in first aspect's embodiment provides, including drive motor 20 and magnetic gear 10.

[0090] Wherein, drive motor 20 includes first output shaft 202.Magnetic gear 10 includes driving rotor 2 and driven rotor 3 and modulate magnetic ring 1, driving rotor 2 and driven rotor 3 are located modulate magnetic ring 1 opposite setting two sides respectively, and driving rotor 2 is installed on first output shaft 202, and driven rotor 3 can rotate under the action of driving rotor 2.As Figure 1 , Figure 2 and Figure 3 indicate, driven rotor 3 includes second output shaft 50, and second output shaft 50 is installed on first output shaft 202, and can rotate relative to first output shaft 202, and when first output shaft 202 rotates, second output shaft 50 can rotate reversely relative to first output shaft 202.

[0091] The motor assembly provided by the embodiment of the utility model, comprising drive motor 20 and magnetic gear 10. Wherein, drive motor 20, magnetic gear 10 and the second output shaft 50 of driven rotor 3 can be assembled to form a contra-rotating motor. The contra-rotating motor has two output ends with opposite rotating directions, so as to drive two parts to rotate in opposite directions. Specifically, magnetic gear 10 comprises driving rotor 2 installed on the first output shaft 202 of drive motor 20, and driving rotor 2 can rotate with the first output shaft 202. Magnetic gear 10 further comprises driven rotor 3 installed corresponding to driving rotor 2 and adjusting magnet ring 1 arranged between driving rotor 2 and driven rotor 3. Wherein, adjusting magnet ring 1 is used to adjust the magnetic circuit between driving rotor 2 and driven rotor 3, so that when driving rotor 2 rotates with the first output shaft 202, driven rotor 3 can be driven to rotate reversely by magnetic force through adjusting magnet ring 1, so as to drive the second output shaft 50 of driven rotor 3 to rotate reversely, so that the power output of driven rotor 3 can be realized through the second output shaft 50. The motor assembly can output opposite driving force through the first output shaft 202 and the second output shaft 50, so as to form a contra-rotating motor. However, the contra-rotating motor only needs to set one motor, so as to not only reduce the cost of the motor assembly, but also simplify the structure of the motor assembly and reduce the volume of the motor assembly. In addition, the motor assembly adopts magnetic gear 10, so that it also has the advantages of no mechanical friction, small vibration, low noise, overload protection and the like. In addition, since the second output shaft 50 is supported and installed on the first output shaft 202, and the rotation center of the first output shaft 202 and the rotation center of the second output shaft 50 are parallel to each other, the concentricity of the first output shaft 202 and the second output shaft 50 is guaranteed, the stability of the motor system is improved, and the installation of the second output shaft 50 is facilitated.

[0092] In any of the above embodiments, optionally, as shown in Figure 1 、 Figure 2 and Figure 3 , the drive motor 20 further comprises a motor body 204, at least a portion of the first output shaft 202 is installed in the motor body 204, and the first output shaft 202 comprises a first output end and a second output end respectively protruding from two opposite sides of the motor body 204; the second output shaft 50 and the driving rotor 2 are installed on the second output end.

[0093] In this embodiment, the two ends of the first output shaft 202 respectively protrude from the two sides of the motor body 204, thereby forming two output ends. One of the output ends is used to install one of the power elements (such as the first fan blade 30), and the other output end is used to install the driving rotor 2 and the second output shaft 50. This scheme can form an output end on each side of the motor, thereby making the structure of the entire fan more stable.

[0094] In any of the above embodiments, optionally, as shown in Figure 18 The driving motor 20 further comprises a motor body 204, at least part of the first output shaft 202 is installed in the motor body 204, and the first output shaft 202 comprises a third output end extending from one side of the motor body 204; at least part of the second output shaft 50 is installed outside the third output end.

[0095] In this embodiment, one end of the first output shaft 202 extends from one side of the motor body 204 to form a third output end, and at least part of the second output shaft 50 is installed outside the third output end, so that the first fan blade 30 and the second fan blade 40 can be installed on the same side of the motor body 204, thereby increasing the air volume.

[0096] In any of the above embodiments, optionally, at least part of the second output shaft 50 is sleeved on the first output shaft 202. In this way, the coaxial installation degree of the first output shaft 202 and the second output shaft 50 can be ensured.

[0097] In any of the above embodiments, optionally, as shown in Figure 2 The fan further comprises one or more bearings installed on the first output shaft 202, and the second output shaft 50 is provided with a rotating hole, and the second output shaft 50 is installed on the one or more bearings through the rotating hole.

[0098] In this embodiment, the second output shaft 50 is hollow, and the hollow structure forms a rotating hole. One or more bearings are arranged between the second output shaft 50 and the first output shaft 202, and the second output shaft 50 is installed on the first output shaft 202 through the bearing, and the second output shaft 50 can rotate relative to the first output shaft 202, so that the second output shaft 50 is rotatably installed on the first output shaft 202. In addition, the second output shaft 50 can also be installed without the support of the first output shaft 202, but in order to ensure the coaxiality between the two, at least part of the first output shaft 202 can be inserted into the second output shaft 50.

[0099] Optionally, the bearings are two and are arranged at intervals, so as to improve the installation stability of the second output shaft 50.

[0100] In any of the above embodiments, optionally, as shown in Figure 3 The second output shaft 50 comprises a support sleeve 502, which is supported and installed on the first output shaft 202 and can rotate relative to the first output shaft 202; an installation part 504 connected with the support sleeve 502, at least part of the driving rotor 2 and the installation part 504 are respectively located on the two sides of the magnetism adjusting ring 1 arranged oppositely, and the driven rotor 3 is installed on the part of the installation part 504 corresponding to the driving rotor 2.

[0101] In this embodiment, the second output shaft 50 comprises two parts, one of which is a support sleeve 502, which is similar to a shaft sleeve, used to be sleeved and installed on the first output shaft 202. The other part is used to install the driven rotor 3, so that the driven rotor 3 and the driving rotor 2 can be arranged on the two sides of the magnetic adjusting ring 1. Among them, the support sleeve 502 and the mounting part 504 are integrated structure, so as to ensure the connection strength of the two.

[0102] Optionally, the support sleeve 502 and the mounting part 504 are integrally formed.

[0103] In any of the above embodiments, optionally, as shown in Figure 2 and Figure 6 , the motor assembly further comprises a mounting bracket 60, the driving motor 20 and the magnetic adjusting ring 1 are mounted on the mounting bracket 60; the driving motor 20 further comprises a motor body 204, at least part of the first output shaft 202 is installed in the motor body 204, and at least part of the first output shaft 202 extends out of the motor body 204; wherein the motor body 204 and the magnetic gear 10 are located on the same side of the mounting bracket 60, or the motor body 204 and the magnetic gear 10 are located on the two sides of the mounting bracket 60 respectively.

[0104] In this embodiment, the mounting bracket 60 is used to form an installation platform to realize the installation of the driving motor 20, the magnetic adjusting ring 1 and other parts. Among them, the motor body 204 and the magnetic gear 10 can be installed on the same side of the mounting bracket 60 when installed. At the same time, the motor body 204 and the magnetic gear 10 can also be installed on the two sides of the mounting bracket 60 when installed, so as to simplify the structure of the whole fan.

[0105] In any of the above embodiments, optionally, as shown in Figure 15 and Figure 16 , the first output shaft 202 comprises: first shaft section 2022, second shaft section 2024 and third shaft section 2026 connected in sequence, the diameters of the first shaft section 2022, the second shaft section 2024 and the third shaft section 2026 increase in turn; wherein the driving rotor 2 is installed on the second shaft section 2024, the second output shaft 50 is installed on the first shaft section 2022, and the third shaft section 2026 is located in the motor body 204.

[0106] In this embodiment, the first output shaft 202 of the motor is a one-piece structure and can include three sections according to the diameters, specifically, the first shaft section 2022, the second shaft section 2024, and the third shaft section 2026. The driving rotor 2 is installed on the second shaft section 2024, the second output shaft 50 is installed on the first shaft section 2022, and the third shaft section 2026 is located in the motor body 204. The purpose of the different diameters of the sections is to facilitate the assembly of the motor, the rotor, the bearing, and other components, and the stepped positions are formed at the sections with different diameters. The stepped positions can serve as axial limiting positions for the assembled components.

[0107] In any of the above embodiments, the first output shaft 202 can further include a fourth shaft section 2028, which is connected to the side of the third shaft section 2026 away from the second shaft section 2024 and extends out of the side of the motor body 204 away from the second shaft section 2024, as shown in Figure 15 and Figure 16 The fourth shaft section 2028 forms an output end for mounting the first fan blade 30.

[0108] In this embodiment, the first output shaft 202 further includes a fourth shaft section 2028. The fourth shaft section 2028 is used to mount the first fan blade 30 and the like. The diameter of the fourth shaft section 2028 can be greater than or equal to the diameter of the third shaft section 2026, or less than the diameter of the third shaft section 2026.

[0109] In any of the above embodiments, the difference between the diameter of the second shaft section 2024 and the diameter of the first shaft section 2022 is greater than or equal to 0.5 mm and less than or equal to 2 mm, and / or the difference between the diameter of the third shaft section 2026 and the diameter of the second shaft section 2024 is greater than or equal to 0.5 mm and less than or equal to 2 mm.

[0110] In this embodiment, the diameters of the three sections of the shaft are D1, D2, and D3, respectively, where D1 < D2 < D3, 0.5 mm ≤ D2 - D1 ≤ 2 mm. When D2 - D1 < 0.5 mm, the machining difficulty is high, and a too small diameter difference causes the stepped position of the shaft to be too small, affecting its axial limiting effect. When D2 - D1 > 2 mm, the machining difficulty increases, resulting in an increase in processing cost. Similarly, 0.5 mm ≤ D3 - D2 ≤ 2 mm. When D3 - D2 < 0.5 mm, the machining difficulty is high, and a too small diameter difference causes the stepped position of the bearing to be too small, affecting its axial limiting effect. When D3 - D2 > 2 mm, the machining difficulty increases, resulting in an increase in processing cost.

[0111] In any of the above embodiments, the first output shaft 202 can further include a fourth shaft section 2028, which is connected to the side of the third shaft section 2026 away from the second shaft section 2024 and extends out of the side of the motor body 204 away from the second shaft section 2024, as shown in Figure 4 , Figure 5 , Figure 8 and Figure 9As shown, the adjusting ring 1 includes: a mounting ring 14; and multiple adjusting teeth 11, along the first circumferential direction (e.g., Figure 4 and Figure 8 The magnetic teeth 11 are spaced apart on the mounting ring 14 in the Z direction, and a magnetic isolation hole 12 is formed between two adjacent magnetic adjustment teeth 11. The mounting ring 14 is located at one end of the plurality of magnetic adjustment teeth 11 along the length direction. A connecting ring 15 is connected to the end of the plurality of magnetic adjustment teeth 11 away from the mounting ring 14, and the connecting ring 15 and the mounting ring 14 are spaced apart along the length direction. Further, as Figure 4 , Figure 8 and Figure 9 As shown, magnetic isolation grooves 13 are provided on one or both ends of the magnetic adjustment tooth 11 along its length.

[0112] In this embodiment, the adjusting ring 1 includes a mounting ring 14 and multiple adjusting teeth 11. Magnetic isolation holes 12 are formed between the multiple adjusting teeth 11. The adjusting teeth 11 are magnetically conductive, guiding the magnetic circuit between the driven rotor 3 and the driving rotor 2, thereby enabling the driven rotor 3 and the driving rotor 2 to rotate in opposite directions. Furthermore, the mounting ring 14 is located at one end of the multiple adjusting teeth 11 along their length; that is, the mounting ring 14 only connects one end of the multiple adjusting teeth 11 along their length, meaning that most of the area along the length of the multiple adjusting teeth 11 is unconnected. This creates relatively large magnetic isolation holes 12 between the multiple adjusting teeth 11, effectively preventing magnetic leakage and improving the magnetic moment transmission effect between the driven rotor 3 and the driving rotor 2. Thus, when the adjusting ring 1 is used in the magnetic gear 10, it can improve the load capacity of the magnetic gear 10 and reduce the risk of the magnetic gear 10 losing synchronization.

[0113] Furthermore, by setting the magnetic isolation groove 13, the magnetic leakage at both ends of the adjusting gear 11 arranged radially can be reduced, thereby further improving the magnetic moment transmission effect between the driven rotor 3 and the driving rotor 2. Thus, when the adjusting ring 1 is used for the magnetic gear 10, the load capacity of the magnetic gear 10 can be further improved, and the risk of the magnetic gear 10 losing synchronization can be reduced.

[0114] At the same time, such as Figure 5 As shown, since the magnetic isolation groove 13 is located relatively close to the end, the structural strength of the magnetic adjustment ring 1 at the end is relatively weak. Therefore, in order to increase the wall thickness of the magnetic adjustment tooth 11 at the end, a chamfer 132 can be provided at the connection of the two sides of the magnetic isolation groove 13 near the end. This can appropriately increase the thickness of the magnetic isolation groove 13 near the end, thereby improving the structural strength of the magnetic adjustment ring 1.

[0115] Furthermore, since the mounting ring 14 has a hollow structure in the middle, leakage of magnetic field through the mounting ring 14 can be further prevented.

[0116] Further, the plurality of magnetism adjusting teeth 11 are connected at both ends in the length direction by the mounting ring 14 and the connecting ring 15, so that the strength of the magnetism adjusting ring 1 can be ensured, and the magnetism adjusting teeth 11 can be prevented from being deformed during operation. Meanwhile, the structure of the magnetism adjusting ring 1 is relatively simple, and the magnetic isolation effect of the magnetism adjusting ring 1 can be improved, and the magnetic flux leakage of the magnetism adjusting ring 1 based on the mounting structure at both ends can be avoided.

[0117] In any of the above embodiments, optionally, as shown in Figure 4 、 Figure 5 、 Figure 8 and Figure 9 , the magnetism adjusting teeth 11 include two end portions arranged in the length direction, the magnetic isolation groove 13 is provided with a chamfer 132, the chamfer 132 is arranged at the side of the magnetic isolation groove 13 close to the end portion, and the magnetic isolation groove 13 is provided with the chamfer 132 at one end or both ends distributed in the first circumferential direction.

[0118] In this embodiment, since the magnetic isolation groove 13 is arranged relatively close to the end portion, the structural strength of the magnetism adjusting ring 1 at the end portion is weak, and therefore, in order to increase the wall thickness of the magnetism adjusting teeth 11 at the end portion, the chamfer 132 can be arranged at the connection of the two sides of the side of the magnetic isolation groove 13 close to the end portion, so that the thickness of the side of the magnetic isolation groove 13 close to the end portion can be appropriately increased, and the structural strength of the magnetism adjusting ring 1 can be improved.

[0119] Further, the magnetic isolation groove 13 is provided with the chamfer 132 at one end or both ends distributed in the first circumferential direction. That is, the side of the magnetic isolation groove 13 close to the end portion can be provided with only one chamfer 132 for single-sided structural reinforcement, or can be provided with two chamfers 132 for double-sided structural reinforcement.

[0120] In any of the above embodiments, optionally, the number of poles of the driving rotor 2 is P1, and the number of poles of the driven rotor 3 is P2, wherein: P1 and P2 are both even numbers, and P1 is less than P2, and / or 0.3≤P2 / P1≤3.

[0121] In this embodiment, the number of poles of the driving rotor 2 is P1, and the number of poles of the driven rotor 3 is P2, and P1 and P2 are both even numbers. P1 should be less than P2, the transmission ratio of the magnetic gear 10 is i, i=P2 / P1. The transmission ratio is 0.3≤i≤3. When i is less than 0.3, there is a risk of out of step at high speed, that is, the driven rotor 3 does not rotate relative to the driving rotor 2 at the original transmission ratio i; when i is greater than 3, the magnetic transmission efficiency is relatively low, that is, the load capacity of the magnetic gear 10 is reduced, and there is a risk of out of step at high speed. Therefore, by setting the transmission ratio i in the range of 0.3-3, the risk of out of step at high speed can be reduced, the magnetic transmission efficiency can be ensured, and the load capacity of the magnetic gear 10 can be enhanced.

[0122] Optionally, the transmission ratio i is set in the range of 1.1-3.

[0123] In the above embodiments, optionally, as shown... Figure 2 and Figure 13 As shown, the driving rotor 2 and the driven rotor 3 are located radially from the magnetic ring 1 (e.g., Figure 2 The two sides (as shown in the diagram) are arranged opposite each other to form a radial magnetic gear, thereby forming a radial counter-rotating motor. At this time, the length direction of the plurality of adjusting magnetic teeth 11 is the axial direction of the mounting ring 14.

[0124] In any of the above embodiments, optionally, the distance between the adjusting magnetic ring 1 and the driving rotor 2 and / or the driven rotor 3 along the length direction of the adjusting magnetic tooth 11 is G, wherein 0.5mm≤G≤4mm.

[0125] When G is less than 0.5mm, the driving rotor 2 and the driven rotor 3 are prone to interference and friction with the magnetic ring 1 due to installation errors and machining errors, which will cause noise. When G is greater than 4mm, the magnetic transmission efficiency will be greatly reduced, which will affect the efficiency of the magnetic transmission and cause the driven shaft to lose synchronization.

[0126] Wherein, when radial magnetization occurs, i.e., the driving rotor 2 and the driven rotor 3 are arranged along the radial direction of the adjusting ring 1, the distance G between the adjusting ring 1 and the driving rotor 2 and / or the driven rotor 3 along the radial direction (this dimension can be specifically defined as follows) Figure 2 In the middle, the adjusting magnetic ring 1 is aligned with the driving rotor 2 and / or the driven rotor 3 along... Figure 2 The radial spacing shown is greater than or equal to 0.5 mm and less than or equal to 4 mm. Specifically, when axially magnetized, i.e., when the driving rotor 2 and driven rotor 3 are arranged along the axial direction of the adjusting ring 1, the distance G between the adjusting ring 1 and the driving rotor 2 and / or driven rotor 3 along the axial direction (this dimension can be specifically...) Figure 6 In the middle, the adjusting magnetic ring 1 is aligned with the driving rotor 2 and / or the driven rotor 3 along... Figure 6 The axial spacing shown is greater than or equal to 0.5 mm and less than or equal to 4 mm.

[0127] In the above embodiments, optionally, as shown... Figure 6 and Figure 14 As shown, the driving rotor 2 and the driven rotor 3 can also be located along the axial direction of the adjusting ring 1 (e.g., Figure 6 The two sides (as shown in the diagram) are positioned opposite each other, thus forming an axial magnetic gear.

[0128] The magnetization directions of the driving rotor 2 and the driven rotor 3 correspond to each other. If the driving rotor 2 and the driven rotor 3 are radially magnetized, the driving rotor 2 and the driven rotor 3 should form a nested structure, with the radial magnetization surfaces of the driving rotor 2 and the driven rotor 3 facing each other; if the driving rotor 2 and the driven rotor 3 are axially magnetized, the axial magnetization surfaces of the driving rotor 2 and the driven rotor 3 should face each other.

[0129] In the above embodiment, optionally, the magnetic adjusting ring 1 further comprises a reinforcing structure arranged at one side of the magnetic isolation groove 13 close to the end portion, and the magnetic isolation groove 13 is provided with the reinforcing structure at one end or both ends in the first circumferential direction.

[0130] In this embodiment, the reinforcing structure can be arranged near the magnetic isolation groove 13 to increase the structural strength of the magnetic conducting tooth. Specifically, one reinforcing structure can be arranged at each of the left and right sides of the outer side of the magnetic isolation groove 13 close to the end portion to enhance the overall structural strength of the magnetic adjusting ring 1.

[0131] In a specific scheme, the magnetic isolation groove 13 is simultaneously provided with the chamfer 132 and the reinforcing structure, so that the structural strength of the magnetic adjusting ring 1 can be doubly enhanced by the chamfer 132 and the reinforcing structure.

[0132] In the above embodiment, optionally, the diameter of the chamfer 132 is v, wherein 0.3mm≤v≤2mm. When v is less than 0.3mm, the area at the chamfer 132 is small, which cannot reinforce the magnetic bridge; when v is greater than 2mm, the area at the chamfer 132 is large, which causes large magnetic leakage at the magnetic isolation bridge, thereby reducing the magnetic transmission efficiency.

[0133] In the above embodiment, optionally, as shown in Figure 2 and Figure 4 , the inner diameter of the mounting ring 14 is Z, the inner diameter of the magnetic adjusting ring 1 is V, Z=V, and / or the outer diameter of the mounting ring 14 is Y, the outer diameter of the magnetic adjusting ring 1 is X, 6mm≤Y-X≤20mm, and / or the thickness of the mounting ring 14 is h1, 0.5mm≤h1≤3mm; and / or the outer diameter of the connecting ring 15 is A, the outer diameter of the magnetic adjusting ring 1 is X, A=X, and / or the inner diameter of the connecting ring 15 is C, the inner diameter of the magnetic adjusting ring 1 is V, 1mm≤V-C≤6mm, and / or the thickness of the connecting ring 15 is h2, 0.5mm≤h2≤3mm.

[0134] In this embodiment, when Y-X is less than 6mm, the width of the mounting ring 14 is too small, the reinforcing strength of the mounting ring 14 is small, and the mounting ring 14 cannot play a role in stably connecting the magnetic adjusting ring 1 and the mounting bracket 60. When Y-X is greater than 20mm, a large radial space is occupied, which causes a waste of space. When h1 is less than 0.5mm, the mounting ring 14 has low strength and is prone to deformation and deflection. When h1 is greater than 3mm, the axial space is wasted. When V-C is less than 1mm, the width of the connecting ring 15 is too small and cannot play a role in reinforcing the strength. When V-C is greater than 6mm, the width of the connecting ring 15 is too large, which easily causes an increase in magnetic leakage and reduces the magnetic transmission efficiency. When h2 is less than 0.5mm, the structural strength of the connecting ring 15 is low, and the magnetic adjusting ring 1 is prone to deformation and deflection, which causes mechanical friction; when h2 is greater than 3mm, the magnetic leakage is increased, which reduces the magnetic transmission efficiency and wastes the axial space.

[0135] In the above embodiment, the connecting ring 15 and the plurality of magnetic adjustment teeth 11 are connected by welding or by adhesive. That is, the connecting ring 15 and the plurality of magnetic adjustment teeth 11 are respectively formed as parts, and the two are connected by later connection.

[0136] In the above embodiment, the magnetic adjustment ring 1 is a metal magnetic conductive ring or a non-metal magnetic conductive ring. The material of the magnetic adjustment ring 1 is not limited in the present application, as long as it is magnetic conductive. Therefore, the magnetic adjustment ring 1 can be set as a metal magnetic conductive ring or a non-metal magnetic conductive ring according to actual conditions.

[0137] The connecting ring 15, the mounting ring 14 and the magnetic adjustment teeth 11 are of an integrated structure or an integrally formed structure, so as to facilitate the processing of the magnetic adjustment ring 1, and to make the entire magnetic adjustment ring 1 have a better magnetic isolation effect.

[0138] In the above embodiment, the magnetic adjustment ring 1 further comprises a filler arranged in the magnetic isolation hole 12, and the filler is a non-magnetic conductive member.

[0139] In this embodiment, a filler having a better magnetic isolation effect than air can be added in the magnetic isolation hole 12 to increase the magnetic isolation effect of the magnetic adjustment ring 1. Of course, no material can be arranged in the magnetic isolation hole 12, and in this case, air can be used for magnetic isolation.

[0140] In the above embodiment, the mounting ring 14 is circular, and the length direction of the plurality of magnetic adjustment teeth 11 is the radial direction of the mounting ring 14, or the length direction of the plurality of magnetic adjustment teeth 11 is the axial direction of the mounting ring 14.

[0141] In the above embodiment, the magnetic adjustment ring 1 is used for a rotating electric machine, and the rotating electric machine comprises a driving rotor 2 and a driven rotor 3. The magnetic adjustment ring 1 is located between the driving rotor 2 and the driven rotor 3, and the number of the magnetic isolation holes 12 is Q, wherein Q=(P1+P2) / 2, wherein P1 is the number of poles of the driving rotor 2, and P2 is the number of poles of the driven rotor 3.

[0142] In the above embodiment, the magnetic adjustment ring 1 is a soft magnetic magnetic adjustment ring, that is, the magnetic adjustment ring 1 is made of soft magnetic material. The soft magnetic material has low coercivity and high magnetic permeability. The soft magnetic material is easy to magnetize and demagnetize, has a narrow and steep hysteresis loop, a nearly reversible magnetization process, a small hysteresis loss, a high magnetic permeability and a low coercivity.

[0143] In the above embodiment, the magnetic adjustment ring 1 is a soft magnetic magnetic adjustment ring, that is, the magnetic adjustment ring 1 is made of soft magnetic material. The soft magnetic material has low coercivity and high magnetic permeability. The soft magnetic material is easy to magnetize and demagnetize, has a narrow and steep hysteresis loop, a nearly reversible magnetization process, a small hysteresis loss, a high magnetic permeability and a low coercivity. Figure 4 , Figure 8 and Figure 9As shown, the thickness of the magnetic adjusting ring 1 is B, wherein 0.5mm≤B≤3mm. When B is less than 0.5mm, the magnetic adjusting ring 1 is too thin, and the strength is too low, and the magnetic adjusting ring 1 is easy to deviate during operation, and the active rotor and / or the driven rotor are contacted to generate mechanical friction and noise. When B is greater than 3mm, the loss of the magnetic adjusting ring 1 is large, and the magnetic adjusting ring 1 occupies a large air gap space between the magnetic rings, and the magnetic transmission efficiency is reduced.

[0144] As shown, the thickness of the magnetic adjusting ring 1 is B, wherein 0.5mm≤B≤3mm. When B is less than 0.5mm, the magnetic adjusting ring 1 is too thin, and the strength is too low, and the magnetic adjusting ring 1 is easy to deviate during operation, and the active rotor and / or the driven rotor are contacted to generate mechanical friction and noise. When B is greater than 3mm, the loss of the magnetic adjusting ring 1 is large, and the magnetic adjusting ring 1 occupies a large air gap space between the magnetic rings, and the magnetic transmission efficiency is reduced. Figure 8 As shown, the thickness of the magnetic adjusting ring 1 is B, wherein 0.5mm≤B≤3mm. When B is less than 0.5mm, the magnetic adjusting ring 1 is too thin, and the strength is too low, and the magnetic adjusting ring 1 is easy to deviate during operation, and the active rotor and / or the driven rotor are contacted to generate mechanical friction and noise. When B is greater than 3mm, the loss of the magnetic adjusting ring 1 is large, and the magnetic adjusting ring 1 occupies a large air gap space between the magnetic rings, and the magnetic transmission efficiency is reduced. Figure 4 As shown, the thickness of the magnetic adjusting ring 1 is B, wherein 0.5mm≤B≤3mm. When B is less than 0.5mm, the magnetic adjusting ring 1 is too thin, and the strength is too low, and the magnetic adjusting ring 1 is easy to deviate during operation, and the active rotor and / or the driven rotor are contacted to generate mechanical friction and noise. When B is greater than 3mm, the loss of the magnetic adjusting ring 1 is large, and the magnetic adjusting ring 1 occupies a large air gap space between the magnetic rings, and the magnetic transmission efficiency is reduced. Figure 4 As shown, the thickness of the magnetic adjusting ring 1 is B, wherein 0.5mm≤B≤3mm. When B is less than 0.5mm, the magnetic adjusting ring 1 is too thin, and the strength is too low, and the magnetic adjusting ring 1 is easy to deviate during operation, and the active rotor and / or the driven rotor are contacted to generate mechanical friction and noise. When B is greater than 3mm, the loss of the magnetic adjusting ring 1 is large, and the magnetic adjusting ring 1 occupies a large air gap space between the magnetic rings, and the magnetic transmission efficiency is reduced.

[0145] In the above embodiment, optionally, the magnetic isolation groove 13 comprises at least one of a rectangle, a circle, an ellipse, a triangle, and a polygon, and the purpose of the magnetic isolation groove 13 is to make the effective magnetic transmission area of the magnetic adjusting ring 1 reasonably transmit the magnetic circuit, reduce the magnetic leakage, and improve the magnetic transmission efficiency.

[0146] In the above embodiment, optionally, as shown in Figure 2 and Figure 4 As shown, the magnetic adjusting ring 1 is used for a rotating electric machine, the magnetic adjusting ring 1 is used for the rotating electric machine, the rotating electric machine comprises two rotors, the magnetic adjusting ring 1 is located between the two rotors, and the two rotors are located on two sides of the magnetic adjusting ring 1 in the radial direction, and the length of the active rotor 2 or the driven rotor 3 in the length direction is H (concretely, the length of the active rotor 2 or the driven rotor 3 in the axial direction of the first output shaft 202), and the length of the magnetic adjusting ring 1 in the length direction is J (as shown), and 1≤J / H≤1.5. Figure 2 As shown, the magnetic adjusting ring 1 is used for a rotating electric machine, the magnetic adjusting ring 1 is used for the rotating electric machine, the rotating electric machine comprises two rotors, the magnetic adjusting ring 1 is located between the two rotors, and the two rotors are located on two sides of the magnetic adjusting ring 1 in the radial direction, and the length of the active rotor 2 or the driven rotor 3 in the length direction is H (concretely, the length of the active rotor 2 or the driven rotor 3 in the axial direction of the first output shaft 202), and the length of the magnetic adjusting ring 1 in the length direction is J (as shown), and 1≤J / H≤1.5. Figure 4 As shown, the magnetic adjusting ring 1 is used for a rotating electric machine, the magnetic adjusting ring 1 is used for the rotating electric machine, the rotating electric machine comprises two rotors, the magnetic adjusting ring 1 is located between the two rotors, and the two rotors are located on two sides of the magnetic adjusting ring 1 in the radial direction, and the length of the active rotor 2 or the driven rotor 3 in the length direction is H (concretely, the length of the active rotor 2 or the driven rotor 3 in the axial direction of the first output shaft 202), and the length of the magnetic adjusting ring 1 in the length direction is J (as shown), and 1≤J / H≤1.5.

[0147] In the above embodiment, optionally, as shown in Figure 2 and Figure 3 As shown, the magnetic adjusting ring 1 is used for a rotating electric machine, the magnetic adjusting ring 1 is used for the rotating electric machine, the rotating electric machine comprises two rotors, the magnetic adjusting ring 1 is located between the two rotors, and the two rotors are located on two sides of the magnetic adjusting ring 1 in the radial direction, and the length of the active rotor 2 or the driven rotor 3 in the length direction is H (concretely, the length of the active rotor 2 or the driven rotor 3 in the axial direction of the first output shaft 202), and the length of the magnetic adjusting ring 1 in the length direction is J (as shown), and 1≤J / H≤1.5. Figure 2 As shown, the magnetic adjusting ring 1 is used for a rotating electric machine, the magnetic adjusting ring 1 is used for the rotating electric machine, the rotating electric machine comprises two rotors, the magnetic adjusting ring 1 is located between the two rotors, and the two rotors are located on two sides of the magnetic adjusting ring 1 in the radial direction, and the length of the active rotor 2 or the driven rotor 3 in the length direction is H (concretely, the length of the active rotor 2 or the driven rotor 3 in the axial direction of the first output shaft 202), and the length of the magnetic adjusting ring 1 in the length direction is J (as shown), and 1≤J / H≤1.5. Figure 4As shown), 1mm≤V-D2≤4mm. When V-D2 is less than 1mm, the adjusting magnetic ring 1 is prone to mechanical friction with the magnetic ring due to installation errors and structural misalignment. When V-D2 is greater than 4mm, the air gap length between the magnetic ring (i.e., the driving rotor 2 or the driven rotor 3) and the adjusting magnetic ring 1 is too large, resulting in excessive magnetic resistance and reduced magnetic transmission efficiency.

[0148] In the above embodiments, optionally, as shown... Figure 4 As shown, the inner diameter of the rotor located on the outer side of the adjusting magnetic ring 1 in the radial direction (specifically, it can be...) Figure 2 The outer ring length of the driven rotor 3 along the radial direction of the first output shaft 202 is W, and the outer diameter of the adjusting magnetic ring 1 is X (e.g., Figure 4 As shown), 1mm≤WX≤4mm. When WX is less than 1mm, the adjusting magnetic ring 1 is prone to mechanical friction with the magnetic ring due to installation errors and structural misalignment. When WX is greater than 4mm, the air gap length between the magnetic ring and the adjusting magnetic ring 1 is too large. Due to the low permeability of air, the magnetic resistance is too large, which reduces the magnetic transmission efficiency.

[0149] In the above embodiments, optionally, as shown... Figure 4 As shown, the length of the adjusting magnetic ring 1 along the longitudinal direction is J, and the length of the magnetic isolation hole 12 along the longitudinal direction is K, where 1mm ≤ JK ≤ 4mm. When JK is greater than 4mm, the axial length of the magnetic isolation groove 13 is too small, failing to isolate the magnetic circuit, and the excessively wide magnetic bridge increases magnetic leakage, reducing magnetic transmission efficiency. When JK is less than 1mm, the width of the connection between the two sides of the magnetic isolation groove 13 along the axial direction is too small, resulting in insufficient strength and easy deformation, causing mechanical friction between the adjusting magnetic ring 1 and the magnetic ring, generating noise.

[0150] In the above embodiments, optionally, as shown... Figure 2 and Figure 4As shown, the circumferential angle corresponding to the magnetic isolation hole 12 along the first circumferential direction is q, and 100° / Q≤q≤260° / Q, where Q is the number of magnetic isolation holes 12. The circumferential angle corresponding to the maximum circumferential angle of the magnetic isolation hole 12 is q, and 100° / Q≤q≤260° / Q. When q is less than 100° / Q, the width of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, and the influence of the magnetic adjusting ring 1 on the magnetic circuit is not obvious. When q is greater than 260° / Q, the width of the magnetic isolation hole 12 is too large, causing the width of the magnetic adjusting tooth 11 to be too small, which easily causes the magnetic saturation of the magnetic adjusting tooth 11 and reduces the magnetic adjusting effect and the magnetic transmission efficiency. The length of the magnetic adjusting ring 1 along the length direction is J, and the length of the magnetic adjusting tooth 11 along the length direction is L. Wherein, 0.6≤L / J≤0.9. When L / J is less than 0.6, the axial length of the magnetic adjusting tooth 11 is too small, that is, the effective magnetic conduction area is too small, which easily causes the magnetic saturation of the magnetic adjusting tooth 11 and increases the magnetic leakage, affecting the magnetic field modulation effect. When L / J is greater than 0.9, the axial length of the magnetic adjusting tooth 11 is too large, the width of the magnetic isolation bridge on both sides of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, the magnetic leakage is increased, and the magnetic transmission efficiency and the magnetic field modulation effect are affected.

[0151] In the above embodiment, optionally, as shown in Figure 6 、 Figure 8 and Figure 11 , the magnetic adjusting ring 1 is used for a rotating electric machine. The rotating electric machine includes two rotors. The magnetic adjusting ring 1 is located between the two rotors, and the two rotors are respectively located on both sides of the magnetic adjusting ring 1 along the axial direction. The magnetic adjusting ring 1 and the rotors are both circular rings. The inner diameter of the magnetic adjusting ring 1 is M, the outer diameter of the magnetic adjusting ring 1 is O, the inner diameter of the rotor is E, and the outer diameter of the rotor is F. Wherein, 0.3≤M / E≤0.9, and / or 1≤O / F≤1.5.

[0152] When M / E is greater than 0.9, the inner diameter of the magnetic adjusting ring 1 is close to the inner diameter of the rotor, causing more magnetic ring leakage and reducing the magnetic transmission efficiency. When M / E is less than 0.3, the inner diameter of the magnetic adjusting ring 1 is small, causing waste of the magnetic conduction material of the magnetic adjusting ring 1. When O / F is less than 1, the outer diameter of the magnetic adjusting ring 1 is smaller than the outer diameter of the rotor, causing more magnetic leakage and reducing the magnetic transmission efficiency. When O / F is greater than 1.5, the outer diameter of the magnetic adjusting ring 1 is too large, causing waste of materials and occupying radial space.

[0153] In the above embodiment, optionally, as shown in Figure 8 and Figure 9 , the length of the magnetic isolation hole 12 along the length direction is P, and 1mm≤((O-M) / 2)-P≤4mm. When ((O-M) / 2)-P is less than 1mm, the width of the magnetic isolation bridge at the connection between the two sides of the magnetic isolation groove 13 is too small, the strength is too small, and the magnetic adjusting ring 1 is easily deformed and interferes with the magnetic ring to generate friction noise. When ((O-M) / 2)-P is greater than 4mm, the width of the magnetic isolation bridge is too large, causing an increase in magnetic leakage and reducing the magnetic transmission efficiency.

[0154] In the above embodiments, optionally, as shown in Figure 8 and Figure 9 , the length of the magnetic adjusting tooth 11 along the length direction is S, wherein 0.6≤S / (O-M) / 2≤0.9. When S / (O-M) / 2 is less than 0.6, the radial length of the magnetic adjusting tooth 11 is too small, which is easy to cause the magnetic saturation of the magnetic adjusting tooth 11 and affect the magnetic adjusting effect. When S / (O-M) / 2 is greater than 0.9, the radial length of the magnetic isolation hole 12 is too small, which is poor in magnetic isolation effect and easy to cause magnetic leakage, thereby affecting the magnetic transmission efficiency and the magnetic adjusting effect.

[0155] In the above embodiments, optionally, as shown in Figure 6 and Figure 7 , the driven rotor 3 and the driving rotor 2 are respectively located at two sides of the magnetic adjusting ring 1 along the axial direction. Wherein, as shown in Figure 10 and Figure 11 , the inner diameter of the driven rotor 3 and / or the driving rotor 2 is E, and the outer diameter of the driven rotor 3 and / or the driving rotor 2 is F, and 0.4≤E / F≤0.7. When E / F is less than 0.4, the inner hole of the rotor is small and the radial thickness is large, which causes the waste of the permanent magnetic material or the magnetic conductive material. When E / F is greater than 0.7, the radial thickness of the rotor is thin, the structure is easy to be broken, the processing difficulty is large, and the magnetic performance of the magnetic ring is low.

[0156] Wherein, as shown in Figure 6 , the inner diameter of the driven rotor 3 is E1, and the outer diameter is F1. As shown in Figure 6 , the inner diameter of the driving rotor 2 is E2, and the outer diameter is F2.

[0157] In the above embodiments, optionally, as shown in Figure 2 and Figure 3 , the driven rotor 3 and the driving rotor 2 are respectively located at two sides of the magnetic adjusting ring 1 along the radial direction, and the ratio between the outer diameter of the driven rotor 3 and / or the driving rotor 2 and the axial height H is greater than or equal to 0.5 and less than or equal to 5. Specifically, the axial height of the driving rotor 2 is H2(as shown in Figure 2 ), and the axial height of the driven rotor 3 is H1(as shown in Figure 2 ).

[0158] In this embodiment, the magnetic ring is radially magnetized, and the magnetized surface of the rotor should be the radial curved surface of the circular ring-shaped magnetic ring, that is, the rotor is a cylinder. The ratio between the outer diameter of the rotor and the height H of the rotor is greater than or equal to 0.5 and less than or equal to 5. When D / H is less than 0.5, the magnetic ring is in the form of an elongated rod, the processing difficulty is high, the magnetic ring is easy to break, the thickness of the magnetic ring is too small, and the magnetic performance is reduced. When D / H is greater than 5, the rotor is in the form of a thin sheet, the magnetized surface area of the magnetic ring is too small, and the magnetic performance of the magnetic ring is reduced.

[0159] In the above embodiments, optionally, as shown in Figure 10 andFigure 13 As shown in the drawings, the inner diameter of the rotor (i.e. driven rotor 3) located outside the radial direction of the magnetic adjusting ring 1 is D1, the outer diameter of the rotor (i.e. driving rotor 2) located inside the radial direction of the magnetic adjusting ring 1 is D2, and the thickness of the magnetic adjusting ring 1 is B, wherein 2mm≤((D1-D2) / 2)-B≤8mm. When (D1-D2) / 2-B is less than 2mm, the rotor and the magnetic adjusting ring 1 are prone to friction and noise due to assembly errors or deflection; when (D1-D2) / 2-B is greater than 8mm, the rotor has a larger magnetic resistance, lower transmission efficiency, and causes the driven shaft to lose synchronization.

[0160] The structure of the radial magnetic drive contrarotating motor is shown in Figure 2 and Figure 3 The radial magnetic drive contrarotating motor includes a driving motor 20 and a magnetic gear, and the magnetic gear includes a mounting bracket 60, a driving rotor 2, a driven rotor 3, and a magnetic adjusting ring 1. The driving motor 20 is fixed on the mounting bracket 60, the driving rotor 2 is fixed on the rotating part of the driving motor 20 and rotates with the driving motor 20, the driving rotor 2 is provided with the magnetic adjusting ring 1 made of soft magnetic material on one side, and the driven rotor 3 is provided on the other side of the magnetic adjusting ring 1. Both the driving rotor 2 and the driven rotor 3 are radially magnetized.

[0161] The structure of the axial magnetic drive contrarotating motor is shown in Figure 6 and Figure 7 The axial magnetic drive contrarotating motor includes a driving motor 20 and a magnetic gear, and the magnetic gear includes a magnetic adjusting ring 1, a driving rotor 2, a driven rotor 3, and a mounting bracket 60. The driving motor 20 is fixed on the mounting bracket 60, the driving rotor 2 is fixed on the rotating part of the driving motor 20 and rotates with the driving motor 20, the driving rotor 2 is provided with the magnetic adjusting ring 1 made of soft magnetic material on one side, and the driven rotor 3 is provided on the other side of the magnetic adjusting ring 1. Both the driving rotor 2 and the driven rotor 3 are axially magnetized.

[0162] As shown in Figure 4 , Figure 8 and Figure 9 The effective magnetic conduction area of the magnetic adjusting ring 1 should be consistent with the shape of the magnetizing area of the magnetic ring. The magnetic adjusting ring 1 is uniformly distributed with magnetic adjusting teeth 11, magnetic isolation holes 12, and magnetic isolation grooves 13, and the axial two sides of the radial magnetic drive magnetic adjusting ring 1 are provided with first reinforcing ribs (such as mounting ring 14) and second reinforcing ribs (such as connecting ring 15).

[0163] The end of the magnetic isolation groove 13 close to the magnetic isolation tooth connection is provided with a chamfer 132. The number of magnetic isolation holes 12 is Q, Q=(P1+P2) / 2, wherein the number of poles of the driving rotor 2 is P1 and the number of poles of the driven rotor 3 is P2.

[0164] If the magnetic ring is radially magnetized (as shown in Figure 10 and Figure 13, the magnetizing surface of the magnetic ring should be the radial curved surface of the circular ring, and the effective magnetic conducting area of the magnetic adjusting ring 1 should also be circular, evenly cut on the radial curved surface around the center of the circular ring.

[0165] If the magnetic ring is axially magnetized (such as the rotor shown in Figure 11 and Figure 14 ), the magnetizing surface of the magnetic ring should be the axial plane of the circular ring. The effective magnetic conducting area of the magnetic adjusting ring 1 should also be planar, evenly cut on the axial plane around the center of the circular ring.

[0166] As shown in Figure 2 , Figure 3 , Figure 6 and Figure 7 , the motor includes a driving motor 20, a mounting bracket 60, a driving rotor 2, a driven rotor 3, and a magnetic adjusting ring 1. The driving rotor 2 is fixed to the rotating part of the driving motor 20, and the driving motor 20 drives the driving rotor 2 to rotate. The driving rotor 2 and the driven rotor 3 can be circular (as shown in Figure 10 ) or disc-shaped (as shown in Figure 11 ). The magnetic adjusting ring 1 made of soft magnetic material is arranged on one side of the driving rotor 2, and the driven rotor 3 is arranged on the other side of the magnetic adjusting ring 1 (as shown in Figure 13 and Figure 14 ). The magnetic adjusting ring 1 is fixed between the driving rotor 2 and the driven rotor 3, and adjusts the magnetic circuit through the magnetic adjusting ring 1 to realize magnetic force driving the driven rotor 3 to rotate in the opposite direction.

[0167] The magnetic adjusting ring 1 is made of ferromagnetic material with magnetic conductivity and has certain strength and is not easy to deform. The effective magnetic conducting area of the magnetic adjusting ring 1 should be consistent with the shape of the magnetic ring magnetizing area. The magnetic adjusting ring 1 is evenly distributed with magnetic adjusting teeth 11, magnetic isolation holes 12, and magnetic isolation grooves 13. The magnetic isolation grooves 13 are provided with chamfers 132 at one end close to the magnetic isolation tooth connection.

[0168] The number of magnetic isolation holes 12 is Q, Q = (P1+P2) / 2, where P1 is the number of poles of the driving rotor 2, P2 is the number of poles of the driven rotor 3, and B is the thickness of the magnetic adjusting ring 1. Wherein, 0.5mm≤B≤3mm, when B is less than 0.5mm, the magnetic adjusting ring 1 is too thin, its structural strength is too low, and it is easy to occur deflection during operation, which is easy to produce mechanical friction and noise; when B is greater than 3mm, the loss of the magnetic adjusting ring 1 is large and occupies a large air gap space between the magnetic rings, which reduces the magnetic transmission efficiency. The magnetic isolation holes 12 can be rectangular, circular, elliptical, triangular, and polygonal irregular shapes. The purpose of the magnetic isolation holes 12 is to enable the effective magnetic conducting area of the magnetic adjusting ring 1 to reasonably transmit the magnetic circuit, reduce magnetic leakage, and improve magnetic transmission efficiency.

[0169] As shown in Figure 4 , Figure 10 andFigure 13 As shown in the figure, the magnetic ring (i.e. the rotor) is radially magnetized, the magnetized surface of the magnetic ring should be the radial surface of the circular ring, and the effective magnetic conduction area of the magnetic adjusting ring 1 should also be circular, and the magnetic isolation hole 12 is uniformly cut on the radial surface along the circumferential direction around the center of the circular ring.

[0170] As shown in the figures Figure 4 , Figure 10 and Figure 13 , the axial length of the magnetic ring is H, the axial length of the magnetic adjusting ring 1 is J, and 1≤J / H≤1.5. When J / H is less than 1, the axial length of the magnetic adjusting ring 1 is less than that of the magnetic ring, resulting in more magnetic leakage and reducing the magnetic transmission efficiency; when J / H is greater than 1.5, the axial length of the magnetic adjusting ring 1 is too large, causing waste of the material of the magnetic adjusting ring 1, and occupying axial space, resulting in an increase in the axial volume of the product.

[0171] The outer diameter of the inner magnetic ring is D, and the inner diameter of the magnetic adjusting ring 1 is V, and 1mm≤V-D2≤4mm. When V-D2 is less than 1mm, the magnetic adjusting ring 1 is prone to mechanical friction with the magnetic ring due to installation errors and structural deflection, and when V-D2 is greater than 4mm, the air gap length between the magnetic ring and the magnetic adjusting ring 1 is too large, the magnetic resistance is too large, and the magnetic transmission efficiency is reduced.

[0172] As shown in the figures Figure 4 , Figure 10 and Figure 13 , the inner diameter of the outer magnetic ring (such as the driven rotor 3) is W, and the outer diameter of the magnetic adjusting ring 1 is X, and 1mm≤W-X≤4mm. When W-X is less than 1mm, the magnetic adjusting ring 1 is prone to mechanical friction with the magnetic ring due to installation errors and structural deflection, and when W-X is greater than 4mm, the air gap length between the magnetic ring and the magnetic adjusting ring 1 is too large, and since the air permeability is low, the magnetic resistance is too large, and the magnetic transmission efficiency is reduced.

[0173] As shown in the figures Figure 4 , Figure 10 and Figure 13 , the axial length of the magnetic adjusting ring 1 is J, and the maximum axial length of the magnetic isolation hole 12 is K, and 1mm≤J-K≤4mm. When J-K is greater than 4mm, the axial length of the magnetic isolation hole 12 is too small to isolate the magnetic circuit, and the wide magnetic bridge causes an increase in magnetic leakage, reducing the magnetic transmission efficiency; when J-K is less than 1mm, the width of the connection on both sides of the magnetic isolation hole 12 is too small, and the strength is insufficient and prone to deformation, causing mechanical friction between the magnetic adjusting ring 1 and the magnetic ring and generating noise.

[0174] As shown in the figures Figure 4 , Figure 10 and Figure 13As shown in the drawings, the circumferential corresponding maximum angle of the magnetic isolation hole 12 is q, and 100° / Q≤q≤260° / Q. When q is less than 100° / Q, the width of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, and the influence of the magnetic adjustment ring 1 on the magnetic circuit is not obvious. When q is greater than 260° / Q, the width of the magnetic isolation hole 12 is too large, causing the width of the magnetic adjustment tooth 11 to be too small, which easily causes the magnetic adjustment tooth 11 to be magnetically saturated, and the magnetic adjustment effect and magnetic transmission efficiency are reduced.

[0175] As shown in the drawings, Figure 4 , Figure 10 and Figure 13 , the magnetic isolation groove 13 is distributed on one side or both sides of the axial direction of the magnetic adjustment tooth 11. The axial length of the magnetic adjustment tooth 11 is L, and the axial length of the magnetic adjustment ring 1 is J. Wherein, 0.6≤L / J≤0.9. When L / J is less than 0.6, the axial length of the magnetic adjustment tooth 11 is too small, that is, the effective magnetic conduction area is too small, which easily causes the magnetic adjustment tooth 11 to be magnetically saturated, and increases the magnetic leakage, affecting the magnetic field modulation effect. When L / J is greater than 0.9, the axial length of the magnetic adjustment tooth 11 is too large, the width of the magnetic isolation hole 12 and the magnetic isolation bridge on both sides is too small, the magnetic isolation effect is poor, the magnetic leakage is increased, and the magnetic transmission efficiency and the magnetic field modulation effect are affected.

[0176] As shown in the drawings, Figure 4 , Figure 8 and Figure 9 , the two corners of the magnetic isolation groove 13 near the connection of the magnetic isolation tooth are chamfered 132. The chamfer 132 plays a role in strengthening the structural strength. The diameter of the chamfer 132 is v, and 0.3mm≤v≤2mm. When v is less than 0.3mm, the area of the chamfer 132 is small, and the effect of reinforcing the magnetic bridge cannot be achieved. When v is greater than 2mm, the area of the chamfer 132 is large, causing the magnetic leakage at the magnetic isolation bridge to be large, and reducing the magnetic transmission efficiency.

[0177] As shown in the drawings, Figure 4 , Figure 8 and Figure 9As shown in the drawings, the side of the magnetic adjusting ring 1 connected with the mounting bracket 60 is provided with a first reinforcing rib (i.e. the mounting ring 14) which is perpendicular to the magnetic adjusting tooth 11 of the magnetic adjusting ring 1 and parallel to the plane of the mounting bracket 60. The first reinforcing rib serves to strengthen the structural strength of the magnetic adjusting ring 1 and connect the magnetic adjusting ring 1 with the mounting bracket 60. The first reinforcing rib can be a circular ring structure, the inner diameter of the first reinforcing rib circular ring is Z, the inner diameter of the magnetic adjusting ring 1 is V, Z=V; the outer diameter of the first reinforcing rib circular ring is Y, the outer diameter of the magnetic adjusting ring 1 is X, 6mm≤Y-X≤20mm; when Y-X is less than 6mm, the width of the reinforcing rib is too small, the effect of strengthening the structural strength is small, and it cannot serve to stably connect the magnetic adjusting ring 1 with the mounting bracket 60; when Y-X is greater than 20mm, it occupies too large radial space, causing waste of space; the thickness of the first reinforcing rib is h1, 0.5mm≤h1≤3mm. When h1 is less than 0.5mm, the structural strength of the reinforcing rib is low, and deformation and deflection are easy to occur; when h1 is greater than 3mm, axial space is wasted.

[0178] As shown in the drawings, Figure 4 , Figure 10 and Figure 13 , the other side of the magnetic adjusting ring 1 in the axial direction is provided with a second reinforcing rib (such as the connecting ring 15), which serves to strengthen the structural strength. The second reinforcing rib is a circular ring structure, the outer diameter of the second reinforcing rib is A, and the outer diameter of the magnetic adjusting ring 1 is X, A=X. The inner diameter of the second reinforcing rib is C, and the inner diameter of the magnetic adjusting ring 1 is V, 1mm≤V-C≤6mm, when V-C is less than 1mm, the width of the reinforcing rib is too small, and it cannot serve to strengthen the structural strength; when V-C is greater than 6mm, the width of the reinforcing rib is too large, and it is easy to cause increase of magnetic leakage, reducing the magnetic transmission efficiency.

[0179] As shown in the drawings, Figure 8 , Figure 9 and Figure 11 , the thickness of the second reinforcing rib is h2, 0.5mm≤h2mm≤3, h2 is less than 0.5mm, the structural strength of the second reinforcing rib is low, and the magnetic adjusting ring 1 is easy to deform and deflect, causing mechanical friction; h2 is greater than 3mm, the magnetic leakage is increased, causing low magnetic transmission efficiency, and wasting axial space.

[0180] As shown in the drawings, Figure 14 , Figure 8 , Figure 9 and Figure 11 , the magnetic ring is axially magnetized, and the magnetizing surface of the magnetic ring should be the axial plane of the circular ring-shaped magnetic ring. The effective magnetic conducting area of the magnetic adjusting ring 1 should also be planar. The magnetic adjusting tooth 11, the magnetic shielding hole 12 and the magnetic shielding groove 13 are uniformly distributed on the magnetic adjusting ring 1, and the end of the magnetic shielding groove 13 close to the magnetic shielding tooth connection is provided with a chamfer 132.

[0181] As shown in the drawings, Figure 14 , Figure 11 , Figure 14 andFigure 8 As shown in the drawings, the inner diameter of the magnetic adjusting ring 1 is M, the outer diameter is O, the inner diameter of the magnetic ring is E, and the outer diameter is F. Among them, 0.6≤M / E≤0.9, when M / E is greater than 0.9, the inner diameter of the magnetic adjusting ring 1 is close to the inner diameter of the magnetic ring, causing the magnetic ring to have more magnetic leakage, reducing the magnetic transmission efficiency; when M / E is less than 0.6, the inner diameter of the magnetic adjusting ring 1 is smaller, causing the magnetic material of the magnetic adjusting ring 1 to be wasted. 1≤O / F≤1.5, when O / F is less than 1, the outer diameter of the magnetic adjusting ring 1 is smaller than the outer diameter of the magnetic ring, causing more magnetic leakage, reducing the magnetic transmission efficiency; when O / F is greater than 1.5, the outer diameter of the magnetic adjusting ring 1 is too large, causing material waste and occupying radial space.

[0182] As shown in the drawings, Figure 9 and Figure 11 , the radial length of the magnetic isolation hole 12 is P, wherein 1mm≤(O-M) / 2-P≤4mm, when (O-M) / 2-P is less than 1mm, the width of the magnetic isolation bridge at both sides of the magnetic isolation hole 12 is too small, the strength is too small, and the structure of the magnetic adjusting ring 1 is easy to deform, causing interference and friction noise between the magnetic adjusting ring 1 and the magnetic ring; when (O-M) / 2-P is greater than 4mm, the width of the magnetic isolation bridge is too large, causing the magnetic leakage to increase, reducing the magnetic transmission efficiency.

[0183] As shown in the drawings, Figure 14 , Figure 8 , Figure 9 and Figure 11 , the maximum circumferential angle corresponding to the magnetic isolation hole 12 is i, 100° / Q≤i≤260° / Q, when i is less than 100° / Q, the width of the magnetic isolation hole 12 is too small, the magnetic isolation effect is poor, causing the magnetic adjusting ring 1 to have little effect on the magnetic circuit; when i is greater than 260° / Q, the width of the magnetic isolation hole 12 is too large, causing the width of the magnetic adjusting tooth 11 to be too small, which is easy to cause the magnetic saturation of the magnetic adjusting tooth 11, and the magnetic adjusting effect and the magnetic transmission efficiency are reduced.

[0184] As shown in the drawings, Figure 14 , Figure 10 , Figure 11 and Figure 12 , the magnetic isolation groove 13 is distributed on one side or both sides of the magnetic adjusting tooth 11 in the radial direction, the maximum radial length of the magnetic adjusting tooth 11 is S, and 0.6≤S / (O-M) / 2≤0.9. When S / (O-M) / 2 is less than 0.6, the radial length of the magnetic adjusting tooth 11 is too small, which is easy to cause the magnetic saturation of the magnetic adjusting tooth 11, affecting the magnetic adjusting effect; when S / (O-M) / 2 is greater than 0.9, the radial length of the magnetic isolation groove 13 is too small, the magnetic isolation effect is poor, and it is easy to cause magnetic leakage, affecting the magnetic transmission efficiency and the magnetic adjusting effect.

[0185] The two corners of the magnetic isolation groove 13 near the side of the magnetic isolation tooth connection are provided with chamfers 132, which play a role in strengthening the structural strength, and the diameter of the chamfer 132 is w, 0.3mm≤w≤2mm. When w is less than 0.3mm, the area of the chamfer 132 is small, and the effect of reinforcing the magnetic bridge cannot be achieved; when w is greater than 2mm, the area of the chamfer 132 is large, causing large magnetic leakage at the magnetic bridge, reducing the magnetic transmission efficiency.

[0186] The rotor is a permanent magnet with certain magnetism. The rotor can be a one-piece annular magnetic ring (as shown in FIG. 1), or a plurality of sheet magnets spliced into a ring structure (as shown in FIG. 2), or a structure in which a plurality of sheet magnets 4 are inserted into a circular ring-shaped magnetic conducting ring 5 (as shown in FIG. 3). Figure 1 Figure 17 Figure 1

[0187] If the magnetic ring is radially magnetized, the magnetization surface of the magnetic ring should be the radial curved surface of the annular magnetic ring, that is, the magnetic ring is a cylinder. The height of the cylinder is H, and the outer diameter of the cylinder is D, 0.5≤D / H≤5. When the volume of the magnetic ring is constant, when D / H is less than 0.5, the magnetic ring is in the form of an elongated rod, which is difficult to process, the magnetic ring is easy to break, the thickness of the magnetic ring is too small, and the magnetic performance is reduced; when D / H is greater than 5, the magnetic ring is in the form of a sheet, the area of the magnetization surface of the magnetic ring is too small, and the magnetic performance of the magnetic ring is reduced.

[0188] If the magnetic ring is radially magnetized, the two magnetic rings should be in a nested position relationship, the inner curved surface of the larger diameter magnetic ring is magnetized, the outer curved surface of the smaller diameter magnetic ring is magnetized, and the two magnetization curved surfaces are opposite.

[0189] The magnetic adjusting ring 1 is fixed between the large magnetic ring and the small magnetic ring, the inner diameter of the large magnetic ring is D1, and the outer diameter of the small magnetic ring is D2; the thickness of the magnetic adjusting ring 1 is B. Among them, 0.5mm≤B≤3mm, when B is less than 0.5mm, the magnetic adjusting ring 1 is too thin, its strength is too low, and it is easy to deviate during operation, the magnetic adjusting ring 1 contacts the driving rotor 2 and / or the driven rotor 3 to produce mechanical friction and noise; when B is greater than 3mm, the magnetic adjusting ring 1 has large loss and occupies a large air gap space between the magnetic rings, reducing the magnetic transmission efficiency. Among them, 2mm≤(D1-D2) / 2-B≤8mm, when (D1-D2) / 2-B is less than 2mm, the magnetic ring and the magnetic adjusting ring 1 are easy to produce friction and noise due to assembly error or deviation; when (D1-D2) / 2-B is greater than 8mm, the magnetic resistance between the magnetic rings is large, the transmission efficiency is low, and even the driven shaft is out of step.

[0190] ​​​If the magnetic ring is axially magnetized, the magnetizing surface of the magnetic ring should be the axial plane of the circular ring, and the axial planes of the two magnetic rings are opposite. The inner diameter of the magnetic ring is E, the outer diameter is F, and 0.4≤E / F≤0.7. When E / F is less than 0.4, the inner hole of the magnetic ring is smaller, and the radial thickness is larger, which causes waste of permanent magnet material or magnetic material. When E / F is greater than 0.7, the radial thickness of the magnetic ring is thin, the structure is easy to break, the processing difficulty is larger, and the magnetic performance of the magnetic ring is low.

[0191] The distance between the magnetic adjusting ring 1 and the driving rotor 2 is G, and 0.5mm≤G≤4mm. When G is less than 0.5mm, the magnetic ring and the magnetic adjusting ring 1 are easy to interfere and rub due to installation error and machining error, causing noise. When G is greater than 4mm, the magnetic transmission efficiency will be greatly reduced, thereby affecting the efficiency of the magnetic transmission, and even leading to the out-of-step of the driven shaft.

[0192] The distance between the magnetic adjusting ring 1 and the driven rotor 3 is I, and 0.5mm≤I≤4mm. When I is less than 0.5mm, the magnetic ring and the magnetic adjusting ring 1 are easy to interfere and rub due to installation error and machining error, causing noise. When I is greater than 4mm, the magnetic transmission efficiency will be greatly reduced, thereby affecting the efficiency of the magnetic transmission, and even leading to the out-of-step of the driven shaft.

[0193] As shown in Figure 17 and Figure 1 , the second aspect of the embodiment of the utility model provides a fan, including the motor assembly provided by any one of the first aspect.

[0194] According to the fan provided by the utility model, since it includes the motor assembly provided by any one of the first aspect, therefore, the fan has all the beneficial effects of the motor assembly provided by any one of the first aspect.

[0195] In the above embodiment, optionally, as shown in Figure 17 and ​ , the fan further includes: a first fan blade 30 mounted on the first output shaft 202 and capable of rotating under the action of the first output shaft 202; and a second fan blade 40 connected with the second output shaft 50 and capable of rotating with the second output shaft 50.

[0196] In this embodiment, the first fan blade 30 is mounted on the first output shaft 202 and can rotate with the first output shaft 202, and the second fan blade 40 is connected with the second output shaft 50 and can rotate with the second output shaft 50 in the opposite direction of the first fan blade 30, so that the first fan blade 30 and the second fan blade 40 can rotate in opposite directions, thereby forming a counter-rotating fan with two fan blades that can rotate in opposite directions. At the same time, since the first output shaft 202 and the second output shaft 50 are coaxially arranged, the stability of the system operation is improved, and since the first fan blade 30 and the second fan blade 40 are respectively mounted on the first output shaft 202 and the second output shaft 50, the first fan blade 30 and the second fan blade 40 can be concentrically arranged, thereby making the airflow generated by the two fan blades more stable, reducing vortex, and reducing noise.

[0197] The fan can output soft, comfortable and variable wind types due to the two fan blades rotating in different directions, and can also reduce noise through the interaction of the two fan blades. In addition, since only one motor needs to be provided, the cost of the fan is reduced, the structure of the fan is simplified, and the size of the fan is reduced. In addition, the fan adopts the magnetic gear 10, and has the advantages of no mechanical friction, small vibration, low noise, overload prevention, etc.

[0198] The first fan blade 30 and the second fan blade 40 are axial flow fans, so that the airflow generated by the front fan blade can be reversed and eliminated by the other fan blade, directly generating axial flow airflow meeting the outlet requirements of the fan. Therefore, it is not necessary to provide guide vanes for the fan, so that the structure of the entire fan becomes simple and compact, and the axial size of the entire machine is greatly shortened.

[0199] In addition, the structure can realize different modes of air outlet by adjusting the speed ratio between the driving rotor 2 and the driven rotor 3. For example, when the speed ratio of the front and rear fan blades is 1:2, the front fan blade can further rub, rub and scatter the wind blown out by the rear fan blade, and the final blown-out wind is very soft. When the speed ratio of the front and rear fan blades is 2:1, the rear fan blade assists the front fan blade, so that a very powerful pressurized airflow can be blown out, which is undoubtedly very good for indoor ventilation. When the speed ratio of the front and rear fan blades is 1:1, the two fan blades disturb the air at the same time, so that a large amount of circulating airflow can be realized, and when the fan rotates up, down, left and right 360°, the function of the circulating fan can be realized. When used with an air conditioner, the indoor temperature can be more balanced.

[0200] The first fan blade 30 is located in front of the second fan blade 40, that is, the first fan blade 30 is designed to be closer to the air outlet side of the fan.

[0201] In any of the above embodiments, optionally, at least a part of the second fan blade 40 is arranged radially outward of the first fan blade 30, or the second fan blade 40 is arranged on the side of the first fan blade 30 along the axial direction thereof.

[0202] In this embodiment, at least a part of the second fan blade can be arranged radially outward of the first fan blade 30, or the second fan blade 40 can be arranged on the side of the first fan blade 30 along the axial direction thereof, so that a greater air volume can be generated under the same rotational speed and power input, effectively improving the efficiency of air exchange. At the same time, this arrangement can also improve the uniformity of the air outlet.

[0203] In any of the above embodiments, optionally, the rotational speed of the first fan blade 30 is n1, and the rotational speed of the second fan blade 40 is n2, and 0.3≤n2 / n1≤3.

[0204] In this embodiment, by limiting the relationship between the rotational speed of the first fan blade 30 and the rotational speed of the second fan blade 40, the internal air speed can be improved, and the air outlet uniformity can be increased.

[0205] In any of the above embodiments, optionally, at least a part of the second fan blade 40 is arranged radially outward of the first fan blade 30, and the rotational speed of the second fan blade 40 is less than the rotational speed of the first fan blade 30.

[0206] Optionally, the rotational speeds of the first output shaft 202 and the second output shaft 50 are different. Specifically, the number of teeth and the number of slots of the inner and outer stators and the outer stator can be set to be different, so that the number of poles of the inner and outer stators is different, so that the rotational speeds of the inner and outer rotors are different, so that different rotational speeds are formed, thereby meeting the needs of different loads. For example, the number of slots of the outer stator is greater than the number of slots of the inner stator, so that the outer stator can realize low speed and large torque through the multi-slot, and at the same time, the inner stator can realize high speed and small torque through the small number of slots, so that the dual-shaft motor can output different rotational speeds, thereby expanding the application scenarios of the motor.

[0207] In any of the above embodiments, optionally, as shown in ​ and ​ The fan further comprises a middle mesh cover 70, the driving motor 20 is installed on the middle mesh cover 70; a first mesh cover 80 and a second mesh cover 90, the first mesh cover 80 and the second mesh cover 90 are fixed on both sides of the middle mesh cover 70 along the axial direction of the first output shaft 202; wherein the first fan blade 30 is installed in the space surrounded by the first mesh cover 80 and the middle mesh cover 70, and the magnetic gear 10 and the second fan blade 40 are installed in the space surrounded by the second mesh cover 90 and the middle mesh cover 70.

[0208] In this embodiment, the middle net cover 70 is used for ventilation on one hand, and can realize the installation of the driving motor 20 and the magnetic gear 10 on the other hand, and meanwhile, this kind of scheme can form an air duct between the second fan blade 40 and the first fan blade 30, so that the air blown out by the first fan blade 30 can pass through the second fan blade 40 and then be blown out by the second fan blade 40.

[0209] In the description of the specification, the terms "connection", "mounting", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0210] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0211] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An electric machine assembly, characterized by The motor assembly comprises: a driving motor comprising a first output shaft; a magnetic gear comprising a driving rotor and a driven rotor and a magnetic adjusting ring, the driving rotor and the driven rotor are respectively located on the two opposite sides of the magnetic adjusting ring, and the driving rotor is installed on the first output shaft, and the driven rotor can rotate under the action of the driving rotor; the driven rotor comprises a second output shaft, which is installed on the first output shaft and can rotate relative to the first output shaft; wherein, when the first output shaft rotates, the second output shaft can rotate in the opposite direction relative to the first output shaft.

2. The motor assembly according to claim 1, wherein the driving motor further comprises a motor body, at least part of the first output shaft is installed in the motor body, and the first output shaft comprises a first output end and a second output end respectively extending from the two opposite sides of the motor body; the second output shaft and the driving rotor are installed on the second output end.

3. The motor assembly according to claim 1, wherein the driving motor further comprises a motor body, at least part of the first output shaft is installed in the motor body, and the first output shaft comprises a third output end extending from one side of the motor body; at least part of the second output shaft is installed outside the third output end.

4. The electric machine assembly of claim 1, wherein, Further comprising: one or more bearings installed on the first output shaft, and a rotating hole is provided on the second output shaft, and the second output shaft is installed on one or more bearings through the rotating hole.

5. The electric machine assembly of claim 1, wherein, The second output shaft comprises: a support sleeve supported and installed on the first output shaft and capable of rotating relative to the first output shaft; a mounting portion connected with the support sleeve, at least part of the driving rotor and the mounting portion are respectively located on the two opposite sides of the magnetic adjusting ring, and the driven rotor is installed on the part of the mounting portion corresponding to the driving rotor.

6. The electric machine assembly of claim 1, wherein, Further comprising: a mounting bracket, the driving motor and the magnetic adjusting ring are installed on the mounting bracket; the driving motor further comprises a motor body, at least part of the first output shaft is installed in the motor body, and at least part of the first output shaft extends from the motor body; wherein, the motor body and the magnetic gear are located on the same side of the mounting bracket, or the motor body and the magnetic gear are respectively located on the two opposite sides of the mounting bracket.

7. The electric machine assembly of claim 1, wherein, The first output shaft comprises: a first shaft section, a second shaft section and a third shaft section connected with each other in sequence, the diameters of the first shaft section, the second shaft section and the third shaft section increase in sequence; wherein, the driving rotor is installed on the second shaft section, the second output shaft is installed on the first shaft section, and the third shaft section is located in the motor body.

8. The motor assembly according to claim 7, wherein the first output shaft further comprises a fourth shaft section connected with the side of the third shaft section away from the second shaft section and extending from the side of the motor body away from the second shaft section, the fourth shaft section forms an output end; and / or The difference between the diameter of the second shaft segment and the diameter of the first shaft segment is greater than or equal to 0.5 mm and less than or equal to 2 mm, and / or the difference between the diameter of the third shaft segment and the diameter of the second shaft segment is greater than or equal to 0.5 mm and less than or equal to 2 mm.

9. The electric machine assembly of any one of claims 1 to 8, wherein, The magnetic adjusting ring comprises: a mounting ring; a plurality of magnetic adjusting teeth, which are spaced apart in a first circumferential direction and are mounted on the mounting ring, and a magnetic isolation hole is formed between adjacent two magnetic adjusting teeth, the mounting ring is located at one end of the plurality of magnetic adjusting teeth in the length direction; a connecting ring, which is connected to one end of the plurality of magnetic adjusting teeth away from the mounting ring, and the connecting ring is spaced apart from the mounting ring in the length direction; wherein the magnetic adjusting teeth are provided with a magnetic isolation groove at one end or both ends in the length direction.

10. The motor assembly according to claim 9, wherein the magnetic adjusting teeth comprise two ends arranged in the length direction, the magnetic isolation groove is provided with a chamfer, the chamfer is arranged on one side of the magnetic isolation groove close to the end, and the magnetic isolation groove is provided with the chamfer at one end or both ends distributed in the first circumferential direction.

11. The electric machine assembly of claim 9, wherein, The distance between the magnetic adjusting ring and the driving rotor and / or the driven rotor in the length direction of the magnetic adjusting tooth is G, wherein 0.5 mm≤G≤4 mm.

12. The electric machine assembly of any one of claims 1 to 8, wherein, The number of poles of the driving rotor is P1, and the number of poles of the driven rotor is P2, wherein: P1 and P2 are both even numbers, and P1 is less than P2, and / or 0.3≤P2 / P1≤3.

13. The electric machine assembly of any one of claims 1 to 8, wherein, The driving rotor and the driven rotor are respectively located on two sides of the magnetic adjusting ring arranged in the radial direction, or the driving rotor and the driven rotor are respectively located on two sides of the magnetic adjusting ring arranged in the axial direction.

14. A fan, comprising: The motor assembly comprises any one of claims 1 to 13.

15. The fan of claim 14, wherein, Further comprising: a first fan blade mounted on the first output shaft and capable of rotating under the action of the first output shaft; a second fan blade connected with the second output shaft and capable of rotating with the second output shaft.

16. The fan according to claim 15, wherein at least part of the second fan blade is arranged radially outside the first fan blade, or the second fan blade is located on one side of the first fan blade in the axial direction.

17. The fan according to claim 15, wherein the rotational speed of the first fan blade is n1, and the rotational speed of the second fan blade is n2, 0.3≤n2 / n1≤3.

18. The fan of claim 15, wherein, At least part of the second fan blade is arranged radially outside the first fan blade, and the rotational speed of the second fan blade is less than that of the first fan blade.

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