Outer rotor motor assembly

Abstract

This utility model discloses an external rotor motor assembly, specifically relating to the field of external rotor motor technology. It includes a turntable with a connecting assembly on it. The connecting assembly includes a bearing mounted on the turntable, a conductive ring rotatably connected to one end of the bearing, an electrode mounted on the conductive ring, a winding mounted on the electrode, and a central shaft positioned at the center of the winding. This utility model restricts the axial movement of the external rotor housing through the sleeve engagement of a limiting disc and the central shaft, avoiding electromagnetic noise and torque fluctuations caused by eccentricity. The magnet plate uses a slot-type insertion installation, allowing for disassembly of the magnet plate and external rotor housing by removing the limiting disc, facilitating the replacement of aged magnets and improving ease of assembly and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of external rotor motor technology, and more specifically, to external rotor motor assemblies. Background Technology

[0002] An external rotor motor assembly is a motor structure in which the rotor is designed outside the stator. Its core feature is that the stator is fixed to a central shaft, while the rotor, as a rotating component, is enclosed around the stator. An external rotor motor assembly typically consists of a stator assembly, a rotor assembly, and connecting components. The stator assembly includes annular silicon steel laminations and windings. Stator teeth distributed around the outer circumference of the laminations form slots to accommodate the windings. The rotor assembly consists of a magnet sleeve and a rotor disc. The magnet sleeve is fitted around the outer circumference of the stator, and the disc is directly connected to the external load via a shaft. This structure allows the rotor to directly drive the load during rotation, eliminating the need for an additional transmission device.

[0003] Among them, patent CN214380397U discloses an external rotor assembly, including a housing, an end cover, and a rotating shaft. The housing is hollow and includes a main body and a housing connecting part thereon. The inner side of the housing connecting part has an end cover mating surface. The end cover is located at one end of the housing and includes an end cover main body and multiple magnet positioning parts disposed on the end face of the end cover main body. The magnet positioning parts are distributed circumferentially. The side of the end cover main body has a housing mating surface. The end cover main body is embedded in the housing connecting part, and the end cover mating surface mates with the housing mating surface to combine the end cover with the housing. The rotating shaft is connected to the end cover. An external rotor motor is also provided, including a stator assembly and the aforementioned external rotor assembly.

[0004] In use, the structure achieves the combination and connection of the end cover and the housing by the mating surface of the housing body of the end cover and the mating surface of the housing connection part. However, the fact that the end cover and the housing are fixed together cannot ensure the stability of the outer rotor when rotating, and the phenomenon of eccentricity is easy to occur. It is not easy to quickly disassemble the outer rotor for structural maintenance, and it is not convenient to use. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an external rotor motor assembly, which aims to solve the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: an external rotor motor assembly, including a turntable, on which a connecting component is provided;

[0007] The connecting assembly includes a bearing mounted on a turntable, one end of which is rotatably connected to a conductive ring, an electrode mounted on the conductive ring, a winding mounted on the electrode, and a central shaft mounted in the middle of the winding.

[0008] The turntable is provided with an outer rotor shell, which covers the outside of the central shaft. One end of the outer rotor shell is rotatably connected to a limiting disk, which is sleeved on the outside of the central shaft. The inner wall of the outer rotor shell is provided with several slots, and a magnetic steel plate is inserted into each slot.

[0009] Optionally, in a possible implementation, a first iron core disk is provided at the bottom of the winding, and a second iron core disk is provided at the top of the winding. The first and second iron core disks are stacked, and a central cylinder is provided between the first and second iron core disks. The winding is sleeved on the outside of the central cylinder, and several baffles are distributed on the outer sides of both the first and second iron core disks. An mounting ring is sleeved on the outer side of the outer rotor shell. The mounting ring is fixed to the outer rotor shell, and several through holes are opened through the mounting ring. The multiple baffles are distributed circumferentially along the axial direction of the first and second iron core disks, and a misalignment opening is formed between each pair of adjacent baffles.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] The axial movement of the outer rotor housing is restricted by the sleeve engagement between the limiting plate and the central shaft, thus avoiding electromagnetic noise and torque fluctuations caused by eccentricity.

[0012] The magnet plate adopts a slot-plug installation method, which allows the magnet plate and outer rotor shell to be disassembled by removing the limit plate, making it convenient to replace the aging magnets and improving the ease of disassembly and assembly.

[0013] The stacked structure of the first and second iron core disks, together with the central cylinder, forms a closed magnetic circuit, avoiding magnetic leakage and ensuring magnetic field stability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0015] Figure 1 This is a front view of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the limiting plate, magnet plate, slot and outer rotor shell of this utility model.

[0018] Figure 4 This is a schematic diagram of the turntable, bearing, conductive ring, electrode, winding and central shaft of this utility model.

[0019] Figure 5 This is a schematic diagram of the first iron core disk, the second iron core disk, the central cylinder, and the baffle of this utility model.

[0020] The attached diagram is labeled as follows: 1. Turntable; 2. Bearing; 3. Conductive ring; 4. Electrode; 5. Winding; 6. Central shaft; 7. Outer rotor housing; 8. Slot; 9. Magnet plate; 10. First iron core disc; 11. Second iron core disc; 12. Central cylinder; 13. Baffle; 14. Limiting disc; 15. Mounting ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As attached Figure 1 - Appendix Figure 5 The external rotor motor assembly shown above uses a connecting component on the turntable 1 to generate a tangential electromagnetic force between the rotating magnetic field and the permanent magnet of the magnetic steel plate 9, which drives the external rotor housing 7 to rotate around the central axis 6. The specific structural configuration of the assembly is as follows.

[0023] The connecting assembly includes a bearing 2 mounted on a turntable 1, a conductive ring 3 rotatably connected to one end of the bearing 2, an electrode 4 mounted on the conductive ring 3, a winding 5 mounted on the electrode 4, and a central shaft 6 mounted in the middle of the winding 5.

[0024] The turntable 1 is provided with an outer rotor shell 7, which covers the outside of the central shaft 6. One end of the outer rotor shell 7 is rotatably connected to a limiting disk 14, which is sleeved on the outside of the central shaft 6. The inner wall of the outer rotor shell 7 is provided with several slots 8, and each slot 8 is respectively inserted with a magnetic steel plate 9.

[0025] Specifically, as shown in the attached document Figure 1 , 2 As shown in Figure 3, an external power source supplies power to the winding 5 through the conductive ring 3 and the electrode 4. The conductive ring 3 is rotatably connected to the turntable 1 through the bearing 2, and the current is continuously and stably input. The slot 8 on the inner wall of the rotor housing 7 is used to insert the magnetic steel plate 9 to form a permanent magnet array. The rotating magnetic field interacts with the magnetic steel plate 9 to generate electromagnetic torque, which drives the outer rotor housing 7 to rotate around the central axis 6, and then directly drives the external load through the turntable 1.

[0026] The bottom of the winding 5 is provided with a first iron core disk 10, and the top of the winding 5 is provided with a second iron core disk 11. The first iron core disk 10 and the second iron core disk 11 are stacked. A central cylinder 12 is provided between the first iron core disk 10 and the second iron core disk 11. The winding 5 is sleeved on the outside of the central cylinder 12. Several baffles 13 are distributed on the outside of the first iron core disk 10 and the second iron core disk 11. An installation ring 15 is sleeved on the outside of the outer rotor shell 7. The installation ring 15 is fixed on the outer rotor shell 7. Several through holes are opened through the installation ring 15. The multiple baffles 13 are distributed circumferentially along the axial direction of the first iron core disk 10 and the second iron core disk 11. A misalignment opening is formed between each pair of adjacent baffles 13.

[0027] Specifically, as shown in the attached document Figure 2 , 3 As shown in Figure 5, the winding 5 is wound around the outside of the central cylinder 12. When three-phase alternating current is applied, a rotating magnetic field is formed under the magnetic permeation of the first iron core disk 10 and the second iron core disk 11. The stacked structure of the iron core disks and the circumferential distribution of the baffles 13 can concentrate the magnetic lines of force and reduce magnetic leakage.

[0028] The specific working principle is as follows: an external power source supplies power to the winding 5 through the conductive ring 3 and the electrode 4. The conductive ring 3 is rotatably connected to the turntable 1 through the bearing 2, ensuring the continuity of current conduction when the rotor rotates. The winding 5 is wound around the outside of the central cylinder 12. When three-phase AC power is applied, a rotating magnetic field is generated under the magnetic guidance of the silicon steel sheets of the first iron core disk 10 and the second iron core disk 11. The slots 8 on the inner wall of the outer rotor shell 7 are evenly inserted with magnetic steel plates 9 to form a permanent magnet array. The rotating magnetic field and the permanent magnets of the magnetic steel plates 9 generate a tangential electromagnetic force, driving the outer rotor shell 7 to rotate around the central axis 6.

[0029] Furthermore, the limiting disk 14 is fitted onto the central shaft 6 with an interference fit, and its side surface forms a certain axial gap with the end face of the outer rotor housing 7, which restricts the axial movement of the outer rotor housing 7 and ensures the rotational stability of the outer rotor housing 7.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An external rotor motor assembly, including a turntable (1), characterized in that: A connecting component is provided on the turntable (1); The connecting assembly includes a bearing (2) disposed on a turntable (1), a conductive ring (3) rotatably connected to one end of the bearing (2), an electrode (4) disposed on the conductive ring (3), a winding (5) disposed on the electrode (4), and a central shaft (6) disposed in the middle of the winding (5). The turntable (1) is provided with an outer rotor shell (7), which covers the outside of the central shaft (6), and one end of the outer rotor shell (7) is rotatably connected to a limiting disk (14), which is sleeved on the outside of the central shaft (6).

2. The external rotor motor assembly according to claim 1, characterized in that: The inner wall of the outer rotor housing (7) is provided with a number of slots (8), and each slot (8) is respectively inserted with a magnetic steel plate (9).

3. The external rotor motor assembly according to claim 1, characterized in that: The winding (5) has a first core disk (10) at the bottom and a second core disk (11) at the top, and the first core disk (10) and the second core disk (11) are stacked.

4. The external rotor motor assembly according to claim 3, characterized in that: A central cylinder (12) is provided between the first iron core disk (10) and the second iron core disk (11). The winding (5) is sleeved on the outside of the central cylinder (12), and several baffles (13) are distributed on the outside of both the first iron core disk (10) and the second iron core disk (11).

5. The external rotor motor assembly according to claim 1, characterized in that: An mounting ring (15) is fitted on the outer side of the outer rotor housing (7). The mounting ring (15) is fixed on the outer rotor housing (7), and several through holes are opened through the mounting ring (15).

6. The external rotor motor assembly according to claim 4, characterized in that: The multiple baffles (13) are distributed circumferentially along the first iron core disk (10) and the second iron core disk (11), and a misalignment opening is formed between each pair of adjacent baffles (13).

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