Magnetic drive motor and air supply device

Abstract

This utility model discloses a magnetic drive motor and an air supply device, including a motor body, an inner rotor, an outer rotor, and a magnetic adjustment ring. The motor body includes a housing and a motor shaft, with the motor shaft extending out of the housing. The inner and outer rotors are coaxially arranged. The inner rotor is provided with at least one first magnetic element, and the outer rotor is provided with at least one second magnetic element. One of the inner and outer rotors is fixed relative to the motor shaft. When the motor shaft rotates, the other of the inner and outer rotors can rotate together through the force between the first and second magnetic elements. The magnetic adjustment ring includes a mounting bracket and multiple magnetic plates. The mounting bracket is made of non-magnetic material and includes a fixing part and a mounting part. The fixing part is connected to the housing, and the mounting part is located between the inner and outer rotors and surrounds the inner rotor. The multiple magnetic plates are mounted on the mounting part and arranged at intervals along the circumference of the mounting part. This application can improve the stability of the magnetic drive motor operation.

Description

Technical Field

[0001] This utility model relates to the field of magnetic drive motor technology, and in particular to a magnetic drive motor and an air supply device. Background Technology

[0002] In related technologies, magnetic adjustment rings typically employ a one-piece structure, which can meet the basic transmission requirements of magnetic gears. However, this one-piece structure has certain drawbacks. Firstly, the connecting bridge portion of the magnetic adjustment ring uses a magnetically conductive material, leading to significant magnetic leakage in the magnetic circuit. Magnetic leakage refers to the magnetic field not being completely concentrated within the predetermined path of the magnetic circuit but leaking into the surrounding environment. This not only wastes magnetic energy but also directly affects the working efficiency of the magnetic gear system. Secondly, the one-piece magnetic adjustment ring requires a large amount of magnetically conductive material during manufacturing, increasing material costs. Furthermore, issues such as material consistency and processing precision may further affect the performance stability of the magnetic adjustment ring. Utility Model Content

[0003] This application provides a magnetic drive motor and an air supply device, which can improve the stability of the magnetic drive motor operation.

[0004] This application provides a magnetic drive motor, including a motor body, an inner rotor, an outer rotor, and a magnetic adjustment ring. The motor body includes a housing and a motor shaft, with the motor shaft extending out of the housing. The inner rotor and the outer rotor are coaxially arranged. The inner rotor is provided with at least one first magnetic element, and the outer rotor is provided with at least one second magnetic element. One of the inner rotor and the outer rotor is fixed relative to the motor shaft. When the motor shaft rotates, the other of the inner rotor and the outer rotor can rotate together through the force between the first magnetic element and the second magnetic element. The magnetic adjustment ring includes a mounting bracket and a plurality of magnetic conductive sheets. The mounting bracket is made of non-magnetic material and includes a fixing part and a mounting part. The mounting part is located between the inner rotor and the outer rotor and surrounds the inner rotor. The plurality of magnetic conductive sheets are mounted on the mounting part and arranged at intervals along the circumference of the mounting part.

[0005] In some embodiments, the magnetic sheet includes a first surface and a second surface that are opposite to each other in its thickness direction, the first surface facing the inner rotor, wherein radial lines passing through the center of the motor shaft pass through the first surface and the second surface.

[0006] In some embodiments, the length of the magnetic sheet is the same as the length of the first magnetic element and the second magnetic element along the length direction of the motor shaft; Alternatively, the length of the magnetic conductive sheet may be smaller than the lengths of the first magnetic element and the second magnetic element.

[0007] In some embodiments, the number of poles of the inner rotor facing the magnetic ring is defined as P1, the number of poles of the outer rotor facing the magnetic ring is defined as P2, and the number of magnetic plates is defined as Q; Where Q = (P1 + P2) / 2.

[0008] In some embodiments, the mounting portion is provided with a plurality of slots, and a magnetic sheet is inserted into one of the slots.

[0009] In some embodiments, the end of the mounting portion away from the fixing portion includes a mounting end face, and the slot opening of the slot penetrates the mounting end face; The end of the magnetic conductive sheet is flush with the mounting end face.

[0010] In some embodiments, the end of the mounting portion away from the fixing portion includes a mounting end face, and the slot opening of the slot penetrates the mounting end face; The magnetic conductive sheet extends beyond the mounting end face, and the length of the portion of the magnetic conductive sheet extending beyond the mounting end face is less than the portion located within the slot.

[0011] In some embodiments, the outer wall of the mounting portion is provided with a first notch communicating with the slot; And / or, the inner wall surface of the mounting part is provided with a second notch communicating with the slot.

[0012] In some embodiments, the mounting portion is further provided with a perforated hole located between two adjacent slots.

[0013] In some embodiments, the magnetic conductive sheet is bonded to the mounting portion.

[0014] In some embodiments, the outer rotor includes an outer rotor support, and the second magnetic element is disposed on the outer rotor support, wherein the outer rotor support is rotatably sleeved on the motor shaft.

[0015] In some embodiments, a bearing is also provided between the outer rotor support and the motor shaft.

[0016] In some embodiments, the number of bearings is at least two, and the at least two bearings are spaced apart along the length of the motor shaft.

[0017] Secondly, this application also provides an air supply device, comprising: Such as the magnetic drive motor mentioned above; The first fan blade is connected to the motor shaft; and The second blade is connected to the outer rotor; The fixing part of the magnetic drive motor is fixedly connected to the fan head of the air supply device.

[0018] In the magnetic drive motor based on the embodiments of this application, one of the inner rotor and the outer rotor is fixed relative to the motor shaft and can rotate as the motor shaft rotates. The other of the inner rotor and the outer rotor can be driven to rotate together by the magnetic attraction between the first magnetic component and the second magnetic component when the motor shaft rotates. The inner rotor and the outer rotor transmit torque through magnetic field interaction without physical contact. Therefore, no mechanical friction or collision will be generated during transmission, thereby effectively reducing the noise generated by mechanical transmission and avoiding gear wear, effectively extending the service life of the motor transmission components.

[0019] Multiple magnetic sheets enhance the magnetic field modulation effect of the tuning ring. In traditional one-piece magnetic rings, magnetic lines of force tend to disperse within continuous materials, especially at edges and corners, causing some lines to deviate from their ideal paths, increasing magnetic leakage. Continuous materials also easily generate large-area eddy currents, leading to higher energy losses. This application addresses this by using multiple magnetic sheets, each working independently. Magnetic lines of force can pass more concentratedly through each sheet, reducing dispersion and detours within the material. Furthermore, the spacing between the sheets blocks the lateral propagation of magnetic lines of force, forcing them to pass along the axial direction of the sheet, thus increasing the concentration of the magnetic field. The spacing also blocks eddy current paths, reducing eddy current losses. In addition, multiple magnetic sheets effectively reduce the weight and cost of the tuning ring compared to a one-piece design. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a magnetic drive motor provided in an embodiment of this application; Figure 2 A cross-sectional schematic diagram of a magnetic drive motor provided in an embodiment of this application; Figure 3 An exploded view of a magnetic adjustment ring provided in an embodiment of this application; Figure 4 A schematic diagram of the structure of an adjusting magnetic ring provided in this application embodiment; Figure 5 This is a schematic diagram of the structure of the adjusting magnetic ring according to another embodiment of this application.

[0022] Explanation of icon numbers: 1. Magnetic drive motor; 10. Adjusting magnetic ring; 110. Mounting bracket; 110a. Slot; 111. Mounting part; 112. Fixing part; 113. Mounting end face; 114. Assembly part; 115. Mounting hole; 120. Magnetic guide sheet; 121. First surface; 122. Second surface; 20. Motor body; 210. Housing; 220. Motor shaft; 230. Motor stator; 240. Motor bracket; 250. Control board; 260. Rotor magnet; 30. Inner rotor; 310. First magnetic component; 40. Outer rotor; 410. Second magnetic component; 420. Outer rotor bracket; 421. Connecting part; 422. Connecting thread; 50. Bearing.

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0025] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0026] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please see Figure 1 and Figure 2This application provides a magnetic drive motor 1, which includes a motor body 20, an inner rotor 30, an outer rotor 40, and a magnetic adjustment ring 10.

[0029] The motor body 20 includes a housing 210, a motor shaft 220, a motor stator 230, a motor bracket 240, and a control board 250. The motor shaft 220 is fixed relative to the housing 210 and partially extends out of the housing 210. The motor stator 230 is fixed relative to the motor bracket 240 and extends towards one side of the motor bracket 240. The control board 250 is fixed relative to the motor bracket 240 and is arranged around the outside of the motor bracket 240. The motor stator 230 can be a coil winding, arranged around the outside of the motor shaft 220 and located inside the housing 210. A rotor magnet 260 is provided on the inside of the housing 210 corresponding to the motor stator 230. The rotor magnet 260 can be a permanent magnet or an electromagnet. When the motor body 20 is in operation, the motor bracket 240 and the motor stator 230 are in a relatively stationary state. Under the magnetic drive of the motor stator 230, the rotor magnet 260 drives the housing 210 and the motor shaft 220 to rotate relative to the motor bracket 240 and the motor stator 230.

[0030] The inner rotor 30 and outer rotor 40 are coaxially arranged. The inner rotor 30 is provided with at least one first magnetic element 310, and the outer rotor 40 is provided with at least one second magnetic element 410. The first magnetic element 310 and the second magnetic element 410 can be permanent magnets or electromagnets. One of the inner rotor 30 and the outer rotor 40 is fixed relative to the motor shaft 220 and can rotate as the motor shaft 220 rotates. The other of the inner rotor 30 and the outer rotor 40 can rotate together with the motor shaft 220 under the magnetic attraction between the first magnetic element 310 and the second magnetic element 410 when the motor shaft 220 rotates. For example, the inner rotor 30 is fixed relative to the motor shaft 220 and rotates as the motor shaft 220 rotates, while the outer rotor 40 can be fixedly connected to an external device to drive the external device to rotate. This example can be used in applications requiring low-speed, high-torque output. In another embodiment, the outer rotor 40 is fixed relative to the motor shaft 220 and rotates as the motor shaft 220 rotates, while the inner rotor 30 can be fixedly connected to an external device to drive the external device to rotate. This example can be used in applications requiring high-speed, low-torque output. Understandably, the inner rotor 30 and outer rotor 40 transmit torque through magnetic field interaction without physical contact. Therefore, no mechanical friction or collision occurs during transmission, effectively reducing noise generated by mechanical transmission and avoiding gear wear, thus effectively extending the service life of the motor transmission components.

[0031] The outer rotor 40 includes an outer rotor support 420, and a second magnetic element 410 is disposed on the outer rotor support 420. The outer rotor support 420 is rotatably sleeved on the motor shaft 220 and fixedly connected to external equipment. The outer rotor support 420 can be forged from high-strength aluminum alloy to enhance its mechanical strength and durability, and improve the stability of the outer rotor support 420 in conjunction with external equipment. The outer rotor support 420 includes a main body and a connecting part 421 connected to each other. The main body is used to install the second magnetic element 410, and the connecting part 421 is used to connect to external equipment. The side of the main body away from the connecting part 421 has a receiving groove. The second magnetic element 410 is installed on the side wall of the receiving groove. The adjusting magnetic ring 10 and the inner rotor 30 can both be at least partially built into the receiving groove. The connecting part 421 can have a connecting channel communicating with the receiving groove. The motor shaft 220 passes through the receiving groove and the connecting channel, so that the outer rotor support 420 is rotatably sleeved on the motor shaft 220. To facilitate the fixed connection between the outer rotor 40 and external equipment, the outer wall surface of the connecting part 421 is provided with a connecting thread 422. The connecting thread 422 is fixed in place by engaging with the threaded hole of the external equipment, and the threaded connection method is simple and firm.

[0032] To improve the rotational stability between the outer rotor support 420 and the motor shaft 220, this application also includes a bearing 50, which is disposed between the outer rotor support 420 and the motor shaft 220. The bearing 50 can be located within the connecting channel and between the connecting portion 421 and the motor shaft 220. The bearing 50 avoids direct contact and friction between the outer rotor support 420 and the motor shaft 220, improving the smoothness and efficiency of rotation, effectively reducing mechanical losses caused by excessive friction, thereby extending the service life of the motor and related components. It also maintains the coaxiality of the outer rotor support 420 relative to the motor shaft 220, making the rotation process smoother and reducing vibration or noise caused by structural asymmetry. The number of bearings 50 can be at least two, and at least two bearings 50 are spaced apart along the length of the motor shaft 220 to further improve the rotational stability between the outer rotor support 420 and the motor shaft 220.

[0033] Bearing 50 can be a rolling bearing (ball bearing, roller bearing) or a sliding bearing. A ball bearing consists of an inner ring, an outer ring, steel balls, and a cage. Ball bearings bear loads through the rolling of the steel balls. Roller bearings are similar to ball bearings, but use rollers instead of steel balls to bear loads. Roller bearings have a larger contact surface and can withstand higher loads. Sliding bearings rely on a lubricating oil film to reduce friction and have a relatively simple structure.

[0034] The magnetic adjustment ring 10 includes a mounting bracket 110 and multiple magnetic plates 120. The mounting bracket 110 is made of non-magnetic material and includes a fixing part 112 and a mounting part 111. The fixing part 112 is fixedly connected to the motor bracket 240. The fixing part 112 can be connected to the motor bracket 240 by means of adhesive bonding, snap-fit, etc. The mounting part 111 is located between the inner rotor 30 and the outer rotor 40 and is arranged around the inner rotor 30. The multiple magnetic plates 120 are mounted on the mounting part 111 and arranged at intervals along the circumference of the mounting part 111. The magnetic sheet 120 can modulate the magnetic field generated between the first magnetic element 310 and the second magnetic element 410 to increase the magnetic force between the first magnetic element 310 and the second magnetic element 410, thereby improving the rotational stability between the inner rotor 30 and the outer rotor 40. The mounting bracket 110 of this application includes a fixing part 112 and a mounting part 111. The mounting part 111 facilitates the mounting of the magnetic sheet 120, and the fixing part 112 facilitates fixing the magnetic sheet 120 between the inner rotor 30 and the outer rotor 40.

[0035] In other embodiments of the motor body 20, the motor shaft 220 is not fixed to the housing 210, but is in a relative rotational relationship. That is, the motor stator 230 is fixed to the housing 210, while the rotor magnet 260 is relatively fixed to the motor shaft 220. In this scheme, the mounting bracket 110 of the adjusting ring 10 can be assembled on the housing 210 to realize the installation and fixation of the adjusting ring 10. Here, this application does not impose specific restrictions on the installation form of the adjusting ring 10.

[0036] The magnetic sheet 120 can be made of soft magnetic material, which has characteristics such as high saturation magnetic flux density, high permeability, narrow and elongated hysteresis loop with small area, low hysteresis loss, and low remanence and coercivity; and possesses certain structural strength and is not easily deformed, such as, but not limited to, high-performance magnetically conductive metal materials like silicon steel sheets and carbon steel. The magnetic sheet 120 can be formed by processes such as stamping or cutting to ensure that its size and shape meet the requirements of the slot 110a. The radial cross-section of the magnetic sheet 120 can be rectangular, circular, arc-shaped, polygonal, etc., and this application does not impose any restrictions on this.

[0037] The mounting bracket 110 can be made of high-strength plastic or ceramic materials, manufactured through advanced processes such as injection molding and machining. These materials possess strong mechanical strength, good high-temperature resistance, and excellent corrosion resistance, thus ensuring that the accuracy and quality of the magnetic ring 10 are unaffected by the external environment during long-term operation. To improve the stability of the magnetic guide sheet 120 on the mounting part 111, the magnetic guide sheet 120 can be bonded to the mounting part 111 using adhesive. Adhesives include epoxy resin adhesive, polyurethane adhesive, acrylic adhesive, etc.

[0038] The multiple magnetic plates 120 provided in this application improve the magnetic field modulation effect of the magnetic ring 10. Specifically, in a traditional integrated magnetic ring, magnetic lines of force tend to disperse in continuous materials, especially at the edges and corners, causing some magnetic lines of force to deviate from their ideal paths, increasing magnetic leakage. Continuous materials are also prone to forming large-area eddy currents, leading to high energy loss. In contrast, this application sets the magnetic ring as multiple magnetic plates 120, each working independently. Magnetic lines of force can pass more concentratedly through each magnetic plate 120, reducing dispersion and detours within the material. Furthermore, the spacing between the magnetic plates 120 blocks the lateral propagation of magnetic lines of force, forcing them to pass along the axial direction of the magnetic plate 120, thereby increasing the concentration of the magnetic field. The spacing between the plates also blocks the path of eddy currents, reducing eddy current losses. In addition, the multiple magnetic plates 120 effectively reduce the weight and cost of the magnetic ring 10 compared to an integrated magnetic ring.

[0039] Furthermore, the first magnetic element 310, the magnetic conductive sheet 120, and the second magnetic element 410 of this application are all radially magnetized, meaning that the magnetic field is arranged in a direction from the center outwards or from the outside inwards. The magnetic pole directions of adjacent first magnetic elements 310, adjacent magnetic conductive sheets 120, and adjacent second magnetic elements 410 are set in opposite directions. For example, if the magnetic pole of a first magnetic element 310 near the magnetic conductive sheet 120 is an "N" pole, then the magnetic pole of the first magnetic element 310 away from the magnetic conductive sheet 120 is an "S" pole, and the magnetic pole of the magnetic conductive sheet 120 near the first magnetic element 310 is an "N" pole, and the magnetic pole of the magnetic conductive sheet 410 away from the first magnetic element 310 is an "S" pole. The magnetic pole of the first magnetic element 310 is the "S" pole, while the magnetic pole of the second magnetic element 410 near the magnetic conductor 120 is the "N" pole, and the magnetic pole of the second magnetic element 410 away from the magnetic conductor 120 is the "S" pole. When one of the magnetic conductors 120 is near the "N" pole of the first magnetic element 310, the magnetic poles corresponding to the two adjacent magnetic conductors 120 become "S" poles, forcing the magnetic lines of force to form a closed loop through the magnetic conductor 120, avoiding magnetic flux loss. Correspondingly, the magnetic pole directions of the first magnetic element 310 and the second magnetic element 410 also change accordingly. That is, the first magnetic element 310, the magnetic conductor 120, and the second magnetic element 410 of this application are radially alternately magnetized, and adjacent magnetic poles (NSNS) form a continuous closed magnetic circuit, reducing magnetic flux leakage.

[0040] Please see Figure 2In some embodiments, the magnetic sheet 120 includes a first surface 121 and a second surface 122 facing away from each other in its thickness direction. The first surface 121 faces the inner rotor 30, and radial lines passing through the center of the motor shaft 220 are disposed on both the first surface 121 and the second surface 122. In this example, the thickness direction of the magnetic sheet 120 extends in the radial direction of the motor shaft 220, that is, the dimension of the magnetic sheet 120 in the circumferential direction of the motor shaft 220 is larger than the dimension of the magnetic sheet 120 in the radial direction of the motor shaft 220. In this way, the modulation of the magnetic field between the inner rotor 30 and the outer rotor 40 by the magnetic sheet 120 can be achieved with less material.

[0041] Please continue reading. Figure 2 In some embodiments, along the length of the motor shaft 220, the length of the magnetic sheet 120 is the same as the length of the first magnetic element 310 and the second magnetic element 410, or the length of the magnetic sheet 120 is smaller than the lengths of the first magnetic element 310 and the second magnetic element 410. Having the length of the magnetic sheet 120 equal to or less than the lengths of the other magnetic elements ensures a complete magnetic flux path, reduces magnetic flux leakage, effectively reduces magnetic field leakage, and ensures a uniform distribution of the magnetic field inside the motor. This avoids power loss or magnetic resistance caused by uneven magnetic fields, thereby improving motor efficiency.

[0042] In some embodiments, the number of poles of the inner rotor 30 facing the magnetic adjustment ring 10 is defined as P1, the number of poles of the outer rotor 40 facing the magnetic adjustment ring 10 is defined as P2, and the number of magnetic plates 120 is defined as Q; wherein, .

[0043] The adjusting ring 10 consists of Q magnetic plates 120, and its core function is to periodically modulate the magnetic field of the inner rotor 30. The inner rotor 30 has P1 poles, and its magnetic field is originally the fundamental magnetic field of P1 opposite poles. When the inner rotor 30 rotates, its magnetic field is cut by the adjusting ring 10, generating a series of spatial harmonics, including the fundamental P1 and higher harmonics. (k is an integer).

[0044] To achieve matching with the 40-pole P2 of the external rotor, the difference frequency harmonics (rather than the sum frequency harmonics) need to be considered. The order of the difference frequency harmonics is:

[0045] when At that time, the difference frequency harmonic order is:

[0046] If P1-P2=2 (i.e., the difference in pole number is 2), then the number of poles P2 of the 40-pole external rotor needs to match the equivalent number of poles of this harmonic.

[0047] like If the outer rotor 40 is designed with P2=P1-2, then the difference frequency harmonic is a pair of opposing magnetic fields that force the outer rotor 40 to rotate in the opposite direction to maintain synchronization.

[0048] Since the adjusting magnetic ring 10 is fixed (stationary), the speed relationship between the inner rotor 30 (number of poles P1) and the outer rotor 40 (number of poles P2) is determined by the following conditions: The differential frequency harmonics of the inner rotor 30 and the magnetic field of the outer rotor 40 must be kept synchronized, that is, the rotation speeds of the two are the same but the directions are opposite.

[0049] Let the rotational speed of the inner rotor 30 be N1, and the rotational speed of the difference frequency harmonic be:

[0050] The outer rotor needs to be synchronized with this harmonic, therefore its rotational speed N2 satisfies:

[0051] The simplified formula for the transmission ratio is:

[0052] If the inner rotor 30 and the outer rotor 10 are required to have the same speed and opposite direction (N1 = -N2), then the following must be satisfied:

[0053] However, when P1=P2, the number of tuning flakes At this point, the system degenerates into a regular magnetic gear, and the adjusting ring loses its modulation function.

[0054] Therefore, the reverse rotation must satisfy P1≠P2 and the difference in extrema must be even (e.g., P1-P2=2).

[0055] When the inner rotor 30 rotates clockwise, its fundamental magnetic field rotates at a speed of N1, while the difference frequency harmonic (reverse rotating field) rotates at a speed of N1. It rotates at a certain speed.

[0056] when At this time, the magnetic plates 120 are symmetrically distributed between the inner rotor 30 and the outer rotor 10 to ensure the periodic switching of the magnetic flux path. For example, when the P1 pole magnetic field of the inner rotor 30 forms a closed loop through Q magnetic plates, the P2 pole magnetic field of the outer rotor 40 must be aligned in the opposite direction to maintain the continuity of the magnetic lines of force, thereby forcing the outer rotor 40 to rotate in the opposite direction.

[0057] The outer rotor with 40 poles, P2, is synchronized with this reverse harmonic and is forced to rotate in the opposite direction to maintain magnetic field synchronization, thereby generating a reverse torque.

[0058] In summary, the transmission ratio formula is: The negative sign indicates a reverse rotation.

[0059] when At that time, through difference frequency harmonic matching The outer rotor 40 is forced to rotate in the opposite direction.

[0060] Please see Figure 3 In some embodiments, the mounting part 111 is provided with multiple slots 110a, and a magnetic sheet 120 is inserted into one of the slots 110a. The magnetic sheet 120 can be fixed in the slot 110a simply by an interference fit, or it can be glued to the slot 110a. The slot 110a has a specific shape and size to accommodate magnetic sheets 120 of different specifications and shapes. Specifically, when the magnetic sheet 120 is inserted into the slot 110a, the size of the slot 110a can be slightly smaller than the size of the magnetic sheet 120 to ensure a certain frictional force between them, thereby achieving initial fixation through an interference fit. The glue forms a strong bond between the magnetic sheet 120 and the slot 110a, preventing loosening or detachment during long-term operation.

[0061] Please see Figure 4 In some embodiments, the end of the mounting portion 111 away from the fixing portion 112 includes a mounting end face 113, and the slot opening of the slot 110a penetrates through the mounting end face 113; wherein, the end of the magnetic conductive sheet 120 is flush with the mounting end face 113. In this example, the slot depth of the slot 110a is the same as the length of the magnetic conductive sheet 120, which saves material and thus saves costs. Moreover, after the magnetic conductive sheet 120 is installed in the slot 110a, there will be no extra space at the slot opening, which can avoid the generation of eddy currents at the slot opening during the rotation of the inner rotor 30 and the outer rotor 40, which would affect the transmission efficiency or generate noise.

[0062] Please see Figure 5 In some embodiments, the end of the mounting portion 111 away from the fixing portion 112 includes a mounting end face 113, and the slot of the slot 110a penetrates through the mounting end face 113; wherein, the magnetic sheet 120 partially extends out of the mounting end face 113, and the length of the portion of the magnetic sheet 120 extending out of the mounting end face 113 is less than the length of its portion located within the slot 110a. In this example, the mounting bracket 110 can be manufactured with less material, while still ensuring the stability and effectiveness of the magnetic sheet 120 during installation. Because the magnetic sheet 120 partially extends out of the mounting end face 113, it can better adapt to high loads or special working environment conditions without increasing material consumption. The length of the extended portion of the magnetic sheet 120 being less than the length of its portion located within the slot 110a ensures sufficient fixing force for the magnetic sheet 120 during use, while reducing the potential structural instability or impact on the overall system balance caused by the excessive extension of the magnetic sheet 120.

[0063] Optionally, the outer wall of the mounting part 111 is provided with a first notch connecting to the slot 110a; and / or the inner wall of the mounting part 111 is provided with a second notch connecting to the slot 110a. That is, one of the outer wall and inner wall of the mounting part 111 can be provided with a notch, or both can be provided with notches. The notch allows the slot 110a to have a certain deformation capability, which can effectively reduce problems caused by errors or improper docking during installation, ensure that the magnetic sheet 120 can be stably installed in a suitable position, and effectively improve the convenience of installing the magnetic sheet 120.

[0064] Optionally, the mounting section 111 is also provided with perforations located between two adjacent slots 110a. Multiple perforations can be provided, thereby reducing the weight of the mounting bracket 110 and thus reducing the overall weight of the magnetic drive motor 1.

[0065] In some embodiments, the mounting bracket 110 further includes an assembly portion 114 connected to the fixing portion 112, and the assembly portion 114 is provided with mounting holes 115. Through the mounting holes 115 on the assembly portion 114, the mounting bracket 110 can be easily and quickly installed and fixed to other components, improving the assembly efficiency of the equipment. The design of the mounting holes 115 can be diversified according to actual needs, ensuring that different specifications of bolts, nuts, and other connecting parts can be flexibly adapted during assembly, thereby achieving a stable connection. The mounting bracket 110 of this application not only serves to install and support the magnetic sheet 120, but also to support the motor. During motor installation, the mounting bracket 110 can withstand the weight of the motor and the vibration and pressure generated during operation, ensuring that the motor maintains stability during operation.

[0066] The second aspect of this solution provides an air supply device, including a magnetic drive motor 1 and a first fan blade as described in any of the above embodiments. The first fan blade is connected to the motor shaft 220 of the magnetic drive motor 1, and / or the air supply device further includes a second fan blade, which is connected to an inner rotor 30 or an outer rotor 40 of the magnetic drive motor 1 that is not connected to the motor shaft 220 of the motor body 20. For example, the first fan blade is connected to the motor shaft 220, and the second fan blade is connected to the connecting portion 421 of the outer rotor bracket 420. The fixing portion 112 of the mounting bracket 110 in the magnetic adjustment ring 10 of the magnetic drive motor 1 is fixed relative to the fan head of the air supply device. Since the air supply device of this embodiment has the magnetic drive motor 1 provided in any of the first aspects embodiments, the air supply device provided in this embodiment has all the beneficial effects of the magnetic drive motor 1 provided in any of the first aspects embodiments, which will not be listed individually here. It is understood that the magnetic drive motor 1 provided in this application embodiment can also be applied to a food processor. In one embodiment, the food processor may optionally include a first stirring blade connected to the motor shaft 220 of the motor body 20. The food processor may also include a second stirring blade connected to either the inner rotor 30 or the outer rotor 40 of the magnetic drive motor 1 that is not connected to the motor shaft 220 of the motor body 20. For example, the first stirring blade is connected to the motor shaft 220, and the second stirring blade is connected to the connecting portion 421 of the outer rotor support 420.

[0067] Specifically, the first and second mixing blades are detachably mounted on the motor. When a single mixing blade cannot achieve the desired mixing effect, the other blade can be installed. For example, during the process of crushing food, the first and second mixing blades can rotate in opposite directions. With the combined action of the first and second mixing blades, the food processor can quickly crush and mix food, and even process multiple different foods in a short time, greatly improving the speed of mixing and crushing. Especially when processing harder foods (such as nuts, ice cubes, dried fruits, etc.), the cooperation of the two blades can effectively improve the crushing effect, thereby shortening the working time.

[0068] Furthermore, the food processor in this embodiment achieves efficient mixing and pulverization while maintaining low energy consumption. Compared to traditional food processors, it effectively reduces power consumption while providing higher performance. Whether for home or commercial use, users can enjoy a more economical, faster, and more efficient food processing experience.

[0069] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic drive motor, characterized in that, include: The motor body includes a housing and a motor shaft, with the motor shaft extending out of the housing; An inner rotor and an outer rotor are coaxially arranged. The inner rotor is provided with at least one first magnetic element, and the outer rotor is provided with at least one second magnetic element. One of the inner rotor and the outer rotor is fixed relative to the motor shaft. When the motor shaft rotates, the other of the inner rotor and the outer rotor can rotate together with the motor shaft through the force between the first magnetic element and the second magnetic element. as well as The magnetic ring includes a mounting bracket and multiple magnetic plates. The mounting bracket is made of a non-magnetic material and includes a fixing part and a mounting part. The mounting part is located between the inner rotor and the outer rotor and is arranged around the inner rotor. The multiple magnetic plates are mounted on the mounting part and are arranged at intervals along the circumference of the mounting part.

2. The magnetic drive motor as described in claim 1, characterized in that, The magnetic sheet includes a first surface and a second surface that are opposite to each other in its thickness direction, the first surface facing the inner rotor, wherein radial lines passing through the center of the motor shaft pass through the first surface and the second surface.

3. The magnetic drive motor as described in claim 1, characterized in that, Along the length of the motor shaft, the length of the magnetic sheet is the same as the length of the first magnetic element and the second magnetic element; Alternatively, the length of the magnetic conductive sheet may be smaller than the lengths of the first magnetic element and the second magnetic element.

4. The magnetic drive motor as described in claim 1, characterized in that, The number of poles of the inner rotor facing the magnetic ring is defined as P1, the number of poles of the outer rotor facing the magnetic ring is defined as P2, and the number of magnetic plates is defined as Q; Where Q = (P1 + P2) / 2.

5. The magnetic drive motor according to any one of claims 1 to 4, characterized in that, The mounting part is provided with multiple slots, and a magnetic sheet is inserted into one of the slots.

6. The magnetic drive motor as described in claim 5, characterized in that, The end of the mounting portion away from the fixing portion includes a mounting end face, and the slot opening of the slot penetrates the mounting end face; The end of the magnetic conductive sheet is flush with the mounting end face.

7. The magnetic drive motor as described in claim 5, characterized in that, The end of the mounting portion away from the fixing portion includes a mounting end face, and the slot opening of the slot penetrates the mounting end face; The magnetic conductive sheet extends beyond the mounting end face, and the length of the portion of the magnetic conductive sheet extending beyond the mounting end face is less than the portion located within the slot.

8. The magnetic drive motor as described in claim 5, characterized in that, The outer wall of the mounting part is provided with a first notch that communicates with the slot; And / or, the inner wall surface of the mounting part is provided with a second notch communicating with the slot.

9. The magnetic drive motor as described in claim 5, characterized in that, The mounting part is also provided with a perforated hole, which is located between two adjacent slots.

10. The magnetic drive motor according to any one of claims 1 to 4, 6 to 9, characterized in that, The magnetic conductive sheet is bonded to the mounting part.

11. The magnetic drive motor according to any one of claims 1 to 4, 6 to 9, characterized in that, The outer rotor includes an outer rotor bracket, and the second magnetic element is disposed on the outer rotor bracket, wherein the outer rotor bracket is rotatably sleeved on the motor shaft.

12. The magnetic drive motor as described in claim 11, characterized in that, A bearing is also provided between the outer rotor support and the motor shaft.

13. The magnetic drive motor as described in claim 12, characterized in that, The number of bearings is at least two, and the at least two bearings are spaced apart along the length of the motor shaft.

14. An air supply device, characterized in that, include: The magnetic drive motor as described in any one of claims 1 to 13; The first blade is connected to the motor shaft; as well as The second blade is connected to the outer rotor; The fixing part of the magnetic drive motor is fixedly connected to the fan head of the air supply device.

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