Outer rotor brushless motor

Abstract

A rotor assembly comprises an upper casing, a lower casing, a water retaining ring, a magnetic ring and a magnetic conducting iron ring, the upper casing and the lower casing are of a cavity structure with one open end, the upper casing and the lower casing are oppositely assembled to form an accommodating cavity, a first through hole is formed in the center of the upper casing, and a second through hole is formed in the center of the lower casing. A second through hole is formed in the center of the lower machine shell, the first through hole and the second through hole are formed in the same axis, and water retaining rings are arranged on the outer side of the first through hole and the outer side of the second through hole respectively. The stator assembly comprises a stator iron core, the stator iron core is arranged in the accommodating cavity, the center of the stator iron core is a hollow part, a plurality of winding parts suitable for winding enameled wires are arranged on the periphery of the outer edge of the stator iron core, the magnetic ring is arranged outside the stator iron core, a plurality of mounting parts are annularly arranged along the outer diameter of the magnetic ring, the mounting parts are suitable for mounting magnetic shoes, and the magnetic shoes are supported by ferrite magnets; the number of the installation parts is 28, the installation parts are suitable for installing 28 magnetic shoes, and the magnetic ring is sleeved with a magnetic conducting iron ring. And the market competitiveness of the product can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric motors, in particular to an outer rotor brushless motor. Background Art

[0002] The extremely high temperature and dry climate in the Middle East has created a demand for high-efficiency outer rotor brushless motors used to drive wind wheels in water-cooled air conditioners. As air conditioners operate for a long time to cool and humidify, such motors need to have the characteristics of high energy efficiency, low speed and high torque to adapt to the hot environment, while reducing energy consumption and carbon emissions. Most motors used to drive wind wheels in traditional water-cooled air conditioners use capacitor-operated induction motors, which are much less efficient than brushless DC motors, have complex production processes and low pass rates. In recent years, although some people in the market have adopted brushless motors, due to improper design, the motor efficiency cannot meet the fan energy efficiency of A++ or even A+++. At the same time, the low production efficiency and high material costs have affected green environmental protection, overall performance and market competitiveness. Utility Model Content

[0003] The utility model aims to solve the technical problems existing in the prior art. To this end, the utility model proposes an outer rotor brushless motor, which can improve motor efficiency, reduce component costs, improve production efficiency, simplify production steps, and improve product market competitiveness.

[0004] According to the first aspect of the present invention, an outer rotor brushless motor includes: a rotor assembly, including an upper housing, a lower housing, a water retaining ring, a magnetic ring and a magnetic conductive ring, the upper housing and the lower housing are cavity-type structures with one end open, the upper housing and the lower housing are assembled opposite to each other to form an accommodating cavity, a first through hole is provided at the center of the upper housing, a second through hole is provided at the center of the lower housing, the first through hole and the second through hole are provided on the same axis, and water retaining rings are provided on the outer sides of the first through hole and the second through hole respectively;

[0005] A stator assembly, comprising a stator core, the stator core is arranged in the accommodating cavity, the center of the stator core is a hollow part, the outer circumference of the stator core is provided with a plurality of winding parts suitable for winding enameled wires, the magnetic ring is arranged outside the stator core, a plurality of mounting parts are arranged along the outer diameter ring of the magnetic ring, the mounting parts are suitable for mounting magnetic tiles, the magnetic tiles are supported by ferrite magnets, the number of the mounting parts is 28, the mounting parts are suitable for mounting 28 magnetic tiles, and the outer sleeve of the magnetic ring is provided with a magnetic conductive ring;

[0006] The centers of the rotor assembly and the stator assembly are located on the same axis, and a power output shaft is passed through the center of the first through hole, the second through hole and the hollow portion.

[0007] An outer rotor brushless motor according to an embodiment of the utility model has at least the following beneficial effects: the upper casing and the lower casing are assembled oppositely to form a accommodating cavity, which ensures the precise positioning of the motor components and makes the center of the stator core and the rotor assembly coaxial with the center of the upper casing and the lower casing. This design improves the overall structural accuracy and stability of the motor, reduces vibration and noise during operation, and increases the service life of the motor; the water retaining ring arranged on the outer side of the central through hole of the upper casing and the lower casing effectively blocks the intrusion of water vapor, especially for water-cooled air-conditioning systems. This design greatly improves the waterproof ability of the motor, ensures that the motor can run stably in a high humidity environment, extends the service life of the motor, and reduces maintenance costs; the 24-slot winding part design of the stator core makes the winding of the enameled wire more convenient, improves the winding efficiency, and at the same time, The optimized layout of the winding part ensures the uniformity of the electromagnetic properties and improves the efficiency and performance of the motor; the magnetic ring is covered with a magnetic conductive ring to protect the magnetic ring and enhance its magnetic properties. The matching design of the magnetic ring and the stator core ensures the operation of the motor at high efficiency and high PF value. At the same time, the use of ferrite magnets reduces the material cost of the motor, and one-piece injection molding improves production efficiency; each magnetic tile will be fixed on a specific mounting part to form a complete 28-pole magnetic ring. This design can ensure the uniform distribution of magnetic force and optimize the torque and efficiency of the motor; this motor design is not only suitable for water-cooled air-conditioning systems, its high efficiency, energy saving and waterproof characteristics also make it an ideal choice for a variety of industrial and commercial environments, especially in extreme climatic conditions such as the Middle East, it can provide stable and reliable performance and enhance the competitiveness of the product in the market.

[0008] According to some embodiments of the utility model, the rotor assembly further includes a first bearing and a second bearing, the first bearing is arranged in the first through hole, the second bearing is arranged in the second through hole, and the outer sides of the first bearing and the second bearing are respectively covered with water retaining rings. The water retaining rings can effectively prevent moisture from penetrating into the motor from the end of the bearing, protect the bearing and other parts of the motor, avoid motor failure or damage caused by moisture erosion, thereby extending the service life of the motor and improving its reliability in a high humidity environment.

[0009] According to some embodiments of the utility model, a three-wave gasket is provided at the abutment between the first bearing and the upper housing, and a circular gasket is provided at the abutment between the second bearing and the lower housing. The three-wave gasket can effectively absorb axial vibration and prevent axial movement, thereby improving the stability of the motor operation and extending the life of the bearing. The circular gasket can prevent the bearing from directly contacting the housing and avoid bearing damage caused by friction or foreign matter intrusion, thereby protecting the bearing and extending its service life.

[0010] According to some embodiments of the utility model, the upper housing is provided with a plurality of first reinforcing ribs, the first reinforcing ribs extending from the first through hole to the outer edge of the upper housing; the lower housing is provided with a plurality of second reinforcing ribs, the second reinforcing ribs extending from the second through hole to the outer edge of the lower housing. The presence of the reinforcing ribs helps to suppress the vibration of the housing, reduce the noise generated when the motor is running, improve the overall rigidity of the housing, and avoid deformation caused by external forces.

[0011] According to some embodiments of the utility model, the number of the winding parts is 24, and the 24 winding parts are arranged at intervals along the outer edge of the stator core in the circumferential direction, and the stator core is a 24-slot structure. Compared with the common cores on the market, the 24 winding parts form a stator core with 24 slots, which has significantly improved the winding production efficiency and the winding speed, while reducing the cost. This design ensures that the motor meets the requirements of large air volume, high torque, high efficiency and high power factor, while the production and manufacturing are more efficient and the cost is more advantageous, making the motor products more competitive in the market.

[0012] According to some embodiments of the utility model, the outer edge of the upper housing is provided with a flange structure, the outer edge of the upper housing is stepped, and the lower housing is mounted in the flange structure. The flange portion of the upper housing plays a positioning role and can be closely matched with the lower housing to form a seal and fixation. During the assembly process, the lower housing will be embedded in the flange structure of the upper housing to ensure that the upper and lower housings of the motor can be accurately aligned and maintain good concentricity, thereby ensuring the stable operation of the motor and extending its service life.

[0013] According to some embodiments of the utility model, the side walls of the upper housing and the lower housing are provided with a plurality of threaded holes, the threaded holes are provided corresponding to the magnetic ring, the threaded holes are suitable for installing threaded fasteners, and the threaded fasteners are suitable for fixing the magnetic ring. The provision of threaded fasteners can simplify the steps of positioning and fixing the magnetic ring, ensure that the magnetic ring is in the correct position when installed, and prevent the magnetic ring from being slightly displaced due to inertial force or vibration.

[0014] According to some embodiments of the utility model, a side of the upper casing away from the accommodating cavity is provided with a plurality of first slots, the depth of the first slots is less than the thickness of the upper casing, and a side of the lower casing away from the accommodating cavity is provided with a plurality of second slots, the depth of the second slots is less than the thickness of the lower casing. This slot design is intended to reduce the weight of the casing while maintaining sufficient structural strength. Without affecting the function and stability of the motor, reducing weight can improve the operating efficiency of the motor and reduce energy consumption. When the size of the motor casing is combined with the matching wind wheel, the wind wheel is in the middle of the motor, so that the stability of the center of gravity of the wind wheel is better.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 A schematic diagram of an outer rotor brushless motor according to an embodiment of the utility model;

[0018] Figure 2 It is an exploded schematic diagram of an outer rotor brushless motor according to an embodiment of the utility model;

[0019] Figure 3 This is one of the schematic diagrams of the upper housing of an embodiment of the utility model;

[0020] Figure 4 This is a second schematic diagram of the upper housing of an embodiment of the utility model;

[0021] Figure 5 A schematic diagram of a lower housing of an embodiment of the utility model;

[0022] Figure 6 A schematic diagram of a magnetic ring according to an embodiment of the present utility model;

[0023] Figure 7 Schematic diagram of a stator core according to an embodiment of the present utility model.

[0024] Figure numerals: upper housing 100; lower housing 110; stator core 120; magnetic ring 130; three-wave gasket 140; water retaining ring 150; first bearing 160; second bearing 165; shaft core 170; magnetic conductive ring 180; first through hole 190; first slot 200; first reinforcing rib 210; flange structure 220; second slot 225; mounting portion 230; winding portion 240; second through hole 250. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Reference Figures 1 to 7 , an outer rotor brushless motor, comprising: a rotor assembly, comprising an upper housing 100, a lower housing 110, a water retaining ring 150, a magnetic ring 130 and a magnetic conductive ring 180, the upper housing 100 and the lower housing 110 are cavity-type structures with one end open, the upper housing 100 and the lower housing 110 are assembled opposite to each other to form a receiving cavity, a first through hole 190 is provided at the center of the upper housing 100, a second through hole 250 is provided at the center of the lower housing 110, the first through hole 190 and the second through hole 250 are arranged on the same axis, and the outer sides of the first through hole 190 and the second through hole 250 are respectively provided with water retaining rings 150;

[0030] The stator assembly includes a stator core 120, which is disposed in the accommodating cavity. The center of the stator core 120 is a hollow portion, and the outer circumference of the stator core 120 has a plurality of winding portions 240 suitable for winding enameled wires.

[0031] The centers of the rotor assembly and the stator assembly are located on the same axis, and a power output shaft is passed through the centers of the first through hole 190 and the second through hole 250 .

[0032] The upper housing 100 and the lower housing 110 are assembled opposite to each other to form a receiving cavity, which ensures the precise positioning of the motor components, so that the center of the stator core 120 and the rotor assembly are on the same axis as the center of the upper housing 100 and the lower housing 110. This design improves the overall structural accuracy and stability of the motor, reduces vibration and noise during operation, and increases the service life of the motor; the water retaining ring 150 arranged on the outer side of the central through hole of the upper housing 100 and the lower housing 110 effectively blocks the intrusion of water vapor, especially for water-cooled air-conditioning systems. This design greatly improves the waterproof ability of the motor and ensures the motor It can also operate stably in high humidity environments, extending the service life of the motor and reducing maintenance costs; the design of the winding part 240 of the stator core 120 makes the winding of the enameled wire more convenient and improves the winding efficiency. At the same time, the layout optimization of the winding part 240 ensures the uniformity of the electromagnetic properties and improves the efficiency and performance of the motor; this motor design is not only suitable for water-cooled air-conditioning systems, its high efficiency, energy saving and waterproof characteristics also make it an ideal choice for a variety of industrial and commercial environments, especially in extreme climatic conditions such as the Middle East, it can provide stable and reliable performance and enhance the product's competitiveness in the market.

[0033] Reference Figure 2 The rotor assembly further includes a first bearing 160 and a second bearing 165. The first bearing 160 is disposed in the first through hole 190, and the second bearing 165 is disposed in the second through hole 250. The outer sides of the first bearing 160 and the second bearing 165 are respectively covered with water retaining rings 150. The water retaining ring 150 can effectively prevent moisture from penetrating into the motor from the end of the bearing, protect the bearing and other parts of the motor, avoid motor failure or damage caused by moisture erosion, thereby extending the service life of the motor and improving its reliability in a high humidity environment. The bearing can be a ball bearing.

[0034] A three-wave gasket 140 is provided at the abutment between the first bearing 160 and the upper housing 100, and a circular gasket is provided at the abutment between the second bearing 165 and the lower housing 110. The three-wave gasket 140 can effectively absorb axial vibration and prevent axial movement, thereby improving the stability of the motor operation and extending the life of the bearing. The circular gasket can prevent the bearing from directly contacting the housing and avoid bearing damage caused by friction or foreign matter intrusion, thereby protecting the bearing and extending its service life.

[0035] Reference Figure 3 and Figure 4The upper housing 100 is provided with a plurality of first reinforcing ribs 210, which extend from the first through hole 190 to the outer edge of the upper housing 100; the lower housing 110 is provided with a plurality of second reinforcing ribs, which extend along the second through hole 250 to the outer edge of the lower housing 110. The presence of the reinforcing ribs helps to suppress the vibration of the housing, reduce the noise generated when the motor is running, improve the overall rigidity of the housing, and avoid deformation caused by external forces.

[0036] Reference Figure 7 , the number of winding parts 240 is 24, and the 24 winding parts 240 are arranged at intervals along the outer edge of the stator core 120 in the circumferential direction. The stator core 120 has an outer diameter of 196 mm, an inner diameter of 25 mm, and a thickness of 40 mm. The 24 winding parts 240 form 24 wire slots. The 24-slot design significantly improves production efficiency and greatly increases the winding speed while ensuring that the motor has sufficient torque output. This design aims to balance motor performance and production efficiency to ensure that the production process is more efficient while meeting customer requirements for motor performance. The cores of water-cooled air conditioners on the market have more than 30 or 40 slots. It takes a long time to wind a stator. After using 24 slots, the stator winding rate is greatly improved.

[0037] The outer edge of the upper housing 100 is provided with a flange structure 220, and the outer edge of the upper housing 100 is stepped, and the lower housing 110 is embedded in the flange structure 220. The flange part of the upper housing 100 plays a positioning role, and can fit closely with the lower housing 110 to form a seal and fixation. During the assembly process, the lower housing 110 will be embedded in the flange structure 220 of the upper housing 100 to ensure that the upper and lower housings 110 of the motor can be accurately aligned and maintain good concentricity, thereby ensuring the stable operation of the motor and extending its service life. This structural design simplifies the assembly process and improves assembly efficiency. At the same time, it also enhances the overall structural strength of the motor, so that it can effectively resist vibration during operation, reduce noise, and enhance user experience. The flange structure 220 and the stepped design also facilitate the disassembly and repair of the motor, providing convenience for later maintenance and upgrades.

[0038] Reference Figure 6The rotor assembly also includes a magnetic ring 130, which is arranged on the stator core 120. A plurality of mounting portions 230 are arranged along the outer diameter of the magnetic ring 130, and the mounting portions 230 are suitable for mounting magnetic tiles. The magnetic pole directions of adjacent magnetic tiles are opposite. A magnetic conductive ring 180 is sleeved on the outside of the magnetic ring 130 to protect the magnetic ring 130 and enhance its magnetic properties. The matching design of the magnetic ring 130 and the stator core 120 ensures that the motor runs at high efficiency and high PF value, while reducing the material cost of the motor and improving production efficiency. The number of mounting portions 230 is 28. Each magnetic tile will be fixed on a specific mounting portion 230 to form a complete 28-pole magnetic ring 130. Such a design can ensure the uniform distribution of magnetic force, thereby optimizing the torque and efficiency of the motor.

[0039] Reference Figures 3 to 5 , the side walls of the upper housing 100 and the lower housing 110 are provided with a plurality of threaded holes, the threaded holes are provided corresponding to the magnetic ring 130, the threaded holes are suitable for installing threaded fasteners, and the threaded fasteners are suitable for fixing the magnetic ring 130. The provision of the threaded fasteners can simplify the positioning and fixing steps of the magnetic ring 130, ensure that the magnetic ring 130 is in the correct position when installed, and can also prevent the magnetic ring 130 from slightly displacing due to inertial force or vibration. The threaded holes can apply uniform pressure to the magnetic ring 130 to prevent the magnetic ring 130 from being displaced in the circumferential direction after the motor has been running for a long time. In this embodiment, the threaded fasteners fix the magnetic conductive ring 180 outside the magnetic ring 130, and the magnetic conductive ring 180 and the magnetic ring 130 are tightly matched, so the threaded fasteners fix the magnetic ring 130.

[0040] Reference Figures 3 to 5 , a plurality of first slots 200 are provided on the side of the upper housing 100 away from the accommodating cavity, and the depth of the first slots 200 is less than the thickness of the upper housing 100, and a plurality of second slots 225 are provided on the side of the lower housing 110 away from the accommodating cavity, and the depth of the second slots 225 is less than the thickness of the lower housing 110. The design of this slot is intended to reduce the weight of the housing while maintaining sufficient structural strength. Without affecting the function and stability of the motor, reducing weight can improve the operating efficiency of the motor and reduce energy consumption. The upper housing 100 and the lower housing 110 of the motor adopt a lightweight design, and the internal structure is optimized to enhance the structural strength and reduce weight. The magnetic ring 130 is fixed by an iron ring to enhance the magnetic properties and prevent the loosening problem that may occur after long-term operation. The shaft core 170 passes through the center hole of the iron core to ensure good concentricity, and there is a positioning snap ring groove on the shaft to facilitate production positioning and assembly. The lead wire passes through the middle of the shaft core 170, reducing the complexity of winding.

[0041] The present embodiment relates to a new type of outer rotor brushless motor, and its structural design is intended to improve the waterproof performance, operating efficiency, stability and service life of the motor. Specifically, the motor includes the following key components: rotor assembly: composed of an upper housing 100, a lower housing 110 and a water retaining ring 150. The upper housing 100 and the lower housing 110 are assembled in a facing manner to form a receiving cavity. The center is respectively provided with a first through hole 190 and a second through hole 250. The two holes are located on the same axis. The outer side of the through hole is equipped with a water retaining ring 150 to effectively isolate external moisture and enhance the protection ability of the motor in a high humidity environment. The stator core 120 is precisely installed in the receiving cavity. The center of the core is a hollow design. 24 winding parts 240 are provided on the outer circumference to facilitate the efficient winding of the enameled wire and optimize the electromagnetic performance. The specific dimensions of the stator core 120 are an outer diameter of 196 mm, an inner diameter of 25 mm, and a thickness of 40 mm, ensuring that the motor can operate efficiently in a compact space. The rotor assembly is tightly embedded in the hollow part of the stator core 120, and is strictly aligned with the center of the upper housing 100, the lower housing 110, and the stator core 120, ensuring the precision and stability of the overall structure of the motor. The rotor assembly also includes a first bearing 160 and a second bearing 165, which are respectively installed in the first through hole 190 and the second through hole 250, and a water retaining ring 150 is installed on the outside, and a ball bearing is used to enhance the rotation efficiency and durability.

[0042] Water retaining rings 150 are respectively provided on the outer sides of the first bearing 160 and the second bearing 165 to effectively prevent water from penetrating into the motor from the ends of the bearings, protect the bearings and other components from water erosion, and extend the service life of the motor. A three-wave gasket 140 is provided at the contact point between the first bearing 160 and the upper housing 100, and a circular gasket is provided at the contact point between the second bearing 165 and the lower housing 110. These gaskets can absorb axial vibration, prevent axial movement, improve the stability of the motor operation, and protect the bearings from direct friction damage, thereby extending their service life.

[0043] The upper housing 100 is provided with a plurality of first reinforcing ribs 210 extending from the first through hole 190 to the edge; the lower housing 110 is provided with second reinforcing ribs arranged along the second through hole 250 to the outer edge. The provision of reinforcing ribs helps to suppress housing vibration, reduce noise, improve overall rigidity, and avoid deformation under external force. The upper housing 100 and the lower housing 110 are provided with a first slot 200 and a second slot 225 on the side away from the accommodating cavity, respectively. The slot depth is less than the housing thickness, aiming to reduce weight while maintaining the necessary structural strength, promote motor operation efficiency and reduce energy consumption.

[0044] The stator assembly additionally integrates a magnetic ring 130, which tightly surrounds the stator core 120. The outer diameter of the magnetic ring 130 is provided with 28 mounting portions 230, which are specifically used to fix the magnetic tiles to ensure uniform distribution of magnetic force and optimize the motor torque and efficiency. The number of magnetic tiles is 28, 14 for N and 14 for S. Through the detailed description of the above embodiments, the outer rotor brushless motor of the utility model not only achieves significant improvements in waterproof performance, operating efficiency, stability, etc., but also fully considers the requirements of lightweight, noise reduction and enhanced electromagnetic performance in structural design, demonstrating its wide applicability and excellent performance in water-cooled air-conditioning systems and various industrial and commercial environments.

[0045] The motor is connected to the driver. The motor is three-phase controlled and uses high-voltage drive, and the PF can reach 0.99. The motor uses three-phase control and is equipped with a driver. The driver uses high-voltage drive and cooperates with the motor body to make the motor have high PF, high efficiency and low noise when running. The coordinated work of the driver and the motor body ensures that the motor exhibits excellent power factor (PF) during operation, significantly improves efficiency, and significantly reduces operating noise, creating a quieter working environment. The application of this high-voltage drive technology not only enhances the energy conversion efficiency of the motor to the industry-leading level, but also effectively suppresses electromagnetic interference and reduces the generation of acoustic noise through refined control strategies, providing users with an efficient and quiet use experience.

[0046] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An outer rotor brushless motor, characterized in that: include: A rotor assembly, comprising an upper housing, a lower housing, a water retaining ring, a magnetic ring and a magnetic conductive ring, wherein the upper housing and the lower housing are cavity-type structures with one end open, the upper housing and the lower housing are assembled opposite to each other to form an accommodating cavity, a first through hole is provided at the center of the upper housing, a second through hole is provided at the center of the lower housing, the first through hole and the second through hole are provided on the same axis, and water retaining rings are provided on the outer sides of the first through hole and the second through hole respectively; A stator assembly, comprising a stator core, the stator core is arranged in the accommodating cavity, the center of the stator core is a hollow part, the outer circumference of the stator core is provided with a plurality of winding parts suitable for winding enameled wires, the magnetic ring is arranged outside the stator core, a plurality of mounting parts are arranged along the outer diameter ring of the magnetic ring, the mounting parts are suitable for mounting magnetic tiles, the magnetic tiles are supported by ferrite magnets, the number of the mounting parts is 28, the mounting parts are suitable for mounting 28 magnetic tiles, and the outer sleeve of the magnetic ring is provided with a magnetic conductive ring; The centers of the rotor assembly and the stator assembly are located on the same axis, and a power output shaft is passed through the center of the first through hole, the second through hole and the hollow portion.

2. The outer rotor brushless motor according to claim 1, characterized in that: The rotor assembly further includes a first bearing and a second bearing. The first bearing is disposed in the first through hole, and the second bearing is disposed in the second through hole. Water retaining rings are respectively provided on the outer sides of the first bearing and the second bearing.

3. The outer rotor brushless motor according to claim 2, characterized in that: A three-wave gasket is arranged at the abutment portion between the first bearing and the upper housing, and a circular ring gasket is arranged at the abutment portion between the second bearing and the lower housing.

4. The outer rotor brushless motor according to claim 1, characterized in that: The upper housing is provided with a plurality of first reinforcing ribs, which extend from the first through hole to the outer edge of the upper housing; the lower housing is provided with a plurality of second reinforcing ribs, which extend along the second through hole to the outer edge of the lower housing.

5. The outer rotor brushless motor according to claim 1, characterized in that: The number of the winding parts is 24, and the 24 winding parts are arranged at intervals in the circumferential direction along the outer edge of the stator core. The stator core has a 24-slot structure.

6. The outer rotor brushless motor according to claim 1, characterized in that: The outer edge of the upper housing is provided with a flange structure, the outer edge of the upper housing is in a stepped shape, and the lower housing is embedded and installed in the flange structure.

7. The outer rotor brushless motor according to claim 1, characterized in that: The side walls of the upper housing and the lower housing are provided with a plurality of threaded holes, the threaded holes are provided corresponding to the magnetic ring, the threaded holes are suitable for installing threaded fasteners, and the threaded fasteners are suitable for fixing the magnetic ring.

8. The outer rotor brushless motor according to claim 1, characterized in that: A plurality of first grooves are arranged on a side of the upper shell away from the accommodating cavity, and a depth of the first grooves is less than a thickness of the upper shell. A plurality of second grooves are arranged on a side of the lower shell away from the accommodating cavity, and a depth of the second grooves is less than a thickness of the lower shell.

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