Axial brushless motor

Abstract

The axial brushless motor comprises an output shaft, at least one rotor layer and at least one stator layer, the rotor layer is arranged on the output shaft in a sleeving mode, N-pole permanent magnets and S-pole permanent magnets which are alternately arranged at intervals are arranged in the circumferential direction of the rotor layer, and the stator layer is arranged on the output shaft in a sleeving mode and located in the axial direction of the rotor layer. A plurality of armature windings are arranged in the circumferential direction of the stator layer at intervals, when the armature windings are powered on, magnetic force acting on the N-pole permanent magnets and the S-pole permanent magnets is formed, then the rotor layer is driven to rotate, the rotor layer can drive the output shaft to rotate through rotation, and torque output is achieved through rotation of the output shaft. The stator layers and the rotor layers are arranged in the axial direction of the output shaft, so that different numbers of rotor layers and stator layers can be selected according to actual requirements, the output torque of the output shaft is adjusted, output of different levels of torques is carried out, and the application range of the motor is expanded.

Description

Technical Field

[0001] The invention relates to the technical field of motor equipment, and in particular to an axial brushless motor. Background Art

[0002] A brushless motor is usually composed of a stator containing an electromagnetic winding and a rotor containing a permanent magnet. In order to enable the brushless motor to obtain a larger output torque, there is currently a motor structure with a double stator structure. By cooperatively driving the rotor with the double stators, the axial output of the rotor brushless motor can be increased.

[0003] For example, a dual-stator permanent magnet synchronous motor disclosed in the document with publication number CN115714516A is provided with an outer stator, an inner stator and a rotor, the outer stator is provided with an outer winding; the inner stator is provided with an inner winding, the rotor is arranged between the outer stator and the inner stator and connected to the output shaft, and the permanent magnet synchronous motor increases the output torque of the output shaft by synchronously driving the rotor through the outer stator and the inner stator.

[0004] Although the existing synchronous motor can increase the output torque of the output shaft to a certain extent by setting a double stator structure, it is difficult to output different levels of torque because the number of stators and rotors is difficult to adjust based on the existing motor structure, which limits the application range of the motor. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and to provide an axial brushless motor to solve the technical problem in the prior art that it is difficult for the motor to adjust the output torque of different levels according to actual usage requirements.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides an axial brushless motor, comprising: Output shaft; At least one rotor layer, each of which is sleeved on the output shaft and can drive the output shaft to rotate by rotating, and the rotor layer is provided with N-pole permanent magnets and S-pole permanent magnets alternately spaced in the circumferential direction; and At least one stator layer, each of the stator layers is sleeved on the output shaft and arranged with the rotor layer along the axial direction of the output shaft, and a plurality of spaced armature windings are arranged in the circumferential direction of the stator layer.

[0007] In some embodiments, the axial brushless motor includes a rotor layer and a stator layer, and the rotor layer is located on one side of the stator layer.

[0008] In some embodiments, the axial brushless motor includes a rotor layer and two stator layers, and the two stator layers are respectively located on both sides of the rotor layer.

[0009] In some embodiments, the axial brushless motor includes two rotor layers and one stator layer, and the two rotor layers are respectively located on both sides of the stator layer.

[0010] In some embodiments, the axial brushless motor includes two or more rotor layers and two or more stator layers, and the rotor layers and the stator layers are alternately arranged.

[0011] In some embodiments, the output shaft includes at least one transmission shaft, the transmission shaft includes a stator connecting section and a rotor connecting section connected to the stator connecting section, the stator connecting section is sleeved with one of the stator layers, and the rotor connecting section is sleeved with one of the rotor layers.

[0012] In some embodiments, the transmission shaft also includes a plug connector, which is connected to the rotor connecting section. The end surface of the stator connecting section is provided with a plug hole adapted to the plug connector, and each transmission shaft can be connected to the plug hole of another transmission shaft through the plug connector.

[0013] In some embodiments, an outer diameter of the rotor connecting segment is smaller than an outer diameter of the stator connecting segment.

[0014] In some embodiments, the stator connecting segment is provided with transmission teeth, and the inner side of the rotor layer is meshed with the transmission teeth.

[0015] In some embodiments, the output shaft further includes a connecting pin, and the connecting pin is threadedly connected to each section of the transmission shaft.

[0016] Compared with the prior art, the axial brushless motor provided by the present invention is provided with an output shaft, at least one rotor layer and at least one stator layer. The rotor layer is sleeved on the output shaft and is provided with alternatingly spaced N-pole permanent magnets and S-pole permanent magnets in the circumferential direction. The stator layer is sleeved on the output shaft and is located in the axial direction of the rotor layer, and the stator layer is adjacent to each rotor layer. A plurality of spaced armature windings are provided in the circumferential direction of the stator layer. When the armature winding is energized, a magnetic force is formed to act on the N-pole permanent magnet and the S-pole permanent magnet, thereby driving the rotor layer to rotate. The rotor layer can drive the output shaft to rotate by rotating, and the output torque is realized by the rotation of the output shaft. Through the above design, the stator layer and the rotor layer are arranged along the axial direction of the output shaft, so that different numbers of rotor layers and stator layers can be selected according to actual needs, the output torque of the output shaft can be adjusted, and different levels of torque can be output, thereby expanding the application range of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an axial brushless motor provided by a first embodiment of the present invention; Figure 2 yes Figure 1 A cross-sectional view of the central axial brushless motor; Figure 3 is a schematic structural diagram of an axial brushless motor provided by a third embodiment of the present invention; Figure 4 yes Figure 3 A cross-sectional view of the central axial brushless motor; Figure 5 is a schematic structural diagram of an axial brushless motor provided by a fourth embodiment of the present invention; Figure 6 yes Figure 5 A cross-sectional view of the central axial brushless motor; Figure 7 is a schematic structural diagram of a rotor layer provided by an embodiment of the present invention; Figure 8 is a schematic structural diagram of a stator layer provided in an embodiment of the present invention; Fig. 9 It is a schematic diagram of the structure of the output shaft provided by an embodiment of the present invention.

[0018] Reference numerals in the figures: 10—output shaft 11—transmission shaft 12—connecting pin 20—rotor layer 21—N-pole permanent magnet 22—S-pole permanent magnet 30—stator layer 31—armature winding 40—position sensor 50—fastening bolt 60—end plate 111—rotor connection section 112—stator connection section 113—plug connector 1111—drive gear 1121—Socket. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem in the prior art that it is difficult for electric motors to adjust the output of different levels of torque according to actual usage requirements, an embodiment of the present invention provides an axial brushless motor. By designing the rotor and the stator along the axial direction of the output shaft, the number of rotors and stators can be adjusted according to actual needs to achieve the output of different levels of torque, thereby improving the application scope of the brushless motor.

[0021] The axial brushless motor provided by the embodiment of the present invention is as follows: Figure 1-8As shown, it includes an output shaft 10, at least one rotor layer 20 and at least one stator layer 30. Each rotor layer 20 is sleeved on the output shaft 10 and can drive the output shaft 10 to rotate by rotating. The rotor layer 20 is provided with alternatingly spaced N-pole permanent magnets 21 and S-pole permanent magnets 22 in the circumferential direction; each stator layer 30 is sleeved on the output shaft 10 and is arranged axially with the rotor layer 20 along the output shaft 10. The stator layer 30 is provided with a plurality of spaced armature windings 31 in the circumferential direction.

[0022] Specifically, the axial brushless motor is provided with an output shaft 10, at least one rotor layer 20 and at least one stator layer 30, wherein the rotor layer 20 is sleeved on the output shaft 10 and is provided with alternately spaced N-pole permanent magnets 21 and S-pole permanent magnets 22 in the circumferential direction, the stator layer 30 is sleeved on the output shaft 10 and is located in the axial direction of the rotor layer 20, the stator layer 30 is adjacent to each rotor layer 20, and a plurality of spaced armature windings 31 are provided in the circumferential direction of the stator layer 30, and when the armature winding 31 is energized, an action is formed. The magnetic force of the N-pole permanent magnet 21 and the S-pole permanent magnet 22 drives the rotor layer 20 to rotate. The rotor layer 20 can drive the output shaft 10 to rotate by rotating, and the torque is output by the rotation of the output shaft 10. Through the above design, the stator layer 30 and the rotor layer 20 are arranged along the axial direction of the output shaft 10, so that different numbers of rotor layers 20 and stator layers 30 can be selected according to actual needs, the output torque of the output shaft 10 can be adjusted, and different levels of torque can be output, thereby expanding the application range of the motor.

[0023] It can be understood that the output shaft 10 can be a long shaft that can accommodate multiple stator layers 30 and rotor layers 20, or it can be spliced ​​together from multiple short shafts. When adding stator layers 30 and rotor layers 20, other short shafts are temporarily spliced ​​to increase the length of the output shaft 10. When reducing stator layers 30 and rotor layers 20, excess short shafts are disassembled to remove excess length of the output shaft 10.

[0024] It can be understood that the rotor layer 20 can be interference-fitted with the output shaft 10, or can be snap-fitted with the output shaft 10, so that the rotor layer 20 can drive the output shaft 10 to rotate by rotating.

[0025] In this embodiment, the inner side of the stator layer 30 is spaced apart from the surface of the output shaft 10 , so that the rotation of the output shaft 10 will not affect the stator layer 30 .

[0026] It can be understood that the stator layer 30 can also be rotatably connected to the output shaft 10 via a bearing.

[0027] It can be understood that each stator layer 30 is adjacent to each rotor layer 20, and the number of rotor layers 20 and stator layers 30 can be adaptively set according to the actual torque output demand. It is only necessary for the rotor layer 20 and the stator layer 30 to be adjacent to each other. For example, the number of rotor layers 20 and the stator layer 30 can be set to 1. When the number of rotor layers 20 and the stator layer 30 is 1, the stator layer 30 is located on one side of the rotor layer 20, and the rotor layer 20 and the stator layer 30 are adjacent to each other. A single stator layer 30 achieves torque output by generating a driving force acting on a single rotor layer 20.

[0028] When the number of rotor layers 20 is one and the number of stator layers 30 is two, the two stator layers 30 are respectively located on both sides of the rotor layer 20, the rotor layer 20 and the stator layer 30 are adjacent to each other, and the two stator layers 30 form a driving force acting on both sides of the rotor layer 20 to achieve torque output.

[0029] When the number of rotor layers 20 is 2 and the number of stator layers 30 is 1, the two rotor layers 20 are respectively located on both sides of the stator layer 30, the rotor layer 20 and the stator layer 30 are adjacent to each other, and the stator layer 30 forms a driving force acting on the two rotor layers 20 to achieve torque output.

[0030] When the number of rotor layers 20 and stator layers 30 is 2 or more, the rotor layers 20 and the stator layers 30 are alternately arranged, the rotor layers 20 and the stator layers 30 are adjacent to each other, and each rotor layer 20 realizes torque output under the coordinated drive of each stator layer 30.

[0031] Therefore, assuming that the number of rotor layers 20 is n and the number of stator layers 30 is m, the numbers of stator layers 30 and rotor layers 20 only need to satisfy n≥1; m≥1; 0≤|nm|≤1.

[0032] Through the above arrangement of the number of rotor layers 20 and stator layers 30, different levels of torque output can be achieved.

[0033] In the first embodiment, if Figure 1-2 As shown, the axial brushless motor includes a rotor layer 20 and a stator layer 30, and the rotor layer 20 is located on one side of the stator layer 30. Specifically, the axial brushless motor sets the number of the rotor layer 20 and the number of the stator layer 30 to 1, so that the torque of the output shaft 10 of the axial brushless motor is output only through the drive of the single rotor layer 20 in the lateral direction by the single stator layer 30, thereby realizing low-energy output of the torque.

[0034] In the second embodiment, the axial brushless motor includes a rotor layer 20 and two stator layers 30, and the two stator layers 30 are respectively located on both sides of the rotor layer 20. Specifically, the axial brushless motor sets the number of rotor layers 20 to 1 and the number of stator layers 30 to 2, so that the torque of the output shaft 10 of the axial brushless motor can be output through the two stator layers 30 to drive a single rotor layer 20, and the energy level output of the torque can be further increased on the basis of a single drive through the coordinated drive of the two stator layers 30.

[0035] In the third embodiment, if Figure 3-4 As shown, the axial brushless motor includes two rotor layers 20 and one stator layer 30, and the two rotor layers 20 are respectively located on both sides of the stator layer 30. Specifically, the axial brushless motor sets the number of rotor layers 20 to 2 and the number of stator layers 30 to 1, so that the torque of the output shaft 10 of the axial brushless motor can be output by driving the two rotor layers 20 on both sides simultaneously through a single stator layer 30. Through the synchronous driving of the output shaft 10 by the rotor layers 20 on both sides, the energy level output of the torque can be further increased on the basis of the driving of a single rotor layer 20 alone.

[0036] In the fourth embodiment, if Figure 5-6 As shown, the axial brushless motor includes two or more rotor layers 20 and two or more stator layers 30, and each rotor layer 20 and each stator layer 30 are alternately arranged. Specifically, the axial brushless motor sets the number of rotor layers 20 and stator layers 30 to 2 or more, so that the torque of the output shaft 10 of the axial brushless motor can be output through the coordinated driving of each rotor layer 20 by multiple stator layers 30, thereby realizing a high-level output of the axial brushless motor torque.

[0037] In one embodiment, Figure 1-6As shown in FIG. 9 , the output shaft 10 includes at least one transmission shaft 11 , and the transmission shaft 11 includes a rotor connecting section 111 and a stator connecting section 112 connected to the stator connecting section 112 , the stator connecting section 112 is sleeved with a stator layer 30 , and the rotor connecting section 111 is sleeved with a rotor layer 20 . Specifically, by setting the output shaft 10 in the form of a multi-section transmission shaft 11, the number of transmission shafts 11 can be adaptively reduced or increased according to the number of rotor layers 20 and stator layers 30. When the number of rotor layers 20 and stator layers 30 is set to 1, only a single-section transmission shaft 11 is needed to meet the installation of the rotor layer 20 and the stator layer 30. When the number of rotor layers 20 and / or stator layers 30 exceeds 1 but is less than 2, two sections of transmission shafts 11 are needed to meet the installation of the rotor layer 20 and the stator layer 30. Therefore, when the number of rotor layers 20 and stator layers 30 is the same, the rotor layer 20 and the stator layer 30 can be installed by the same number of transmission shafts 11 as the rotor layer 20 and the stator layer 30. When the number of rotor layers 20 and the stator layer 30 is different, the number of transmission shafts 11 is the same as the number of rotor layers 20 or stator layers 30. Let the number of transmission shafts 11 be x, and x should satisfy x=max{n,m}.

[0038] In one embodiment, Figure 1-6 As shown in FIG. 9 , the transmission shaft 11 further includes a plug connector 113, which is connected to the rotor connection section 111. The end surface of the stator connection section 112 is provided with a plug hole 1121 adapted to the plug connector 113, and each transmission shaft 11 can be plugged into the plug hole 1121 of another transmission shaft 11 through the plug connector 113. Specifically, each transmission shaft 11 can be docked only by plugging the plug connector 113 into the plug hole. Since the plug hole 1121 is provided in the stator connection section 112 and the plug connector 113 is provided in the rotor connection section 111, after the plug connector 113 is plugged into the plug hole 1121, the rotor connection section 111 of the adjacent transmission shaft 11 can be connected with the stator connection section 112.

[0039] It can be understood that the plug-in hole 1121 can be any non-circular hole structure, so that the transmission shaft 11 can rotate driven by the adjacent transmission shaft 11 .

[0040] In this embodiment, Fig. 9 As shown, the plug connector 113 is hexagonal, and the plug hole 1121 is a hexagonal hole.

[0041] In one embodiment, Figure 3-6 As shown, the output shaft 10 also includes a connecting nail 12, and the connecting nail 12 is threadedly connected to each section of the transmission shaft 11. Specifically, when the number of the transmission shafts 11 is more than two, the connecting nail 12 is threadedly connected to each transmission shaft 11 to achieve the locking of each transmission shaft 11, so that each transmission shaft 11 is connected as a whole.

[0042] In one embodiment, Figure 2 , 4 , 6 and 9, the outer diameter of the rotor connecting section 111 is smaller than the outer diameter of the stator connecting section 112. Specifically, since the outer diameter of the stator connecting section 112 is relatively large, the stator connecting section 112 forms a shaft shoulder structure, which limits the rotor layer 20, so that the rotor layer 20 can be stabilized by the stator connecting section 112 of the sleeved transmission shaft 11 and the stator connecting section 112 of the adjacent transmission shaft 11.

[0043] In one embodiment, Figure 1 , 5 As shown in FIG. 9 , the stator connecting section 112 is provided with transmission teeth 1111, and the inner side of the rotor layer 20 is meshed with the transmission teeth 1111. Specifically, through the meshing of the rotor layer 20 with the transmission teeth 1111, the rotation of the rotor layer 20 can be effectively transmitted to the output shaft 10, and the disassembly and assembly of the rotor layer 20 can be facilitated.

[0044] In this embodiment, Figure 1-6 As shown, the axial brushless motor further includes at least one position sensor 40 . The number of the position sensors 40 is the same as the number of the rotor layers 20 . Each position sensor 40 is located outside each rotor layer 20 and is used to sense the phase of the rotor layer 20 .

[0045] In this embodiment, Figure 1-6 As shown, the axial brushless motor further includes a fastening bolt 50 and two end plates 60, and the two end plates 60 are respectively located on one side of the stator layer 30 or the rotor layer 20 at the edge to limit the stator layer 30 or the rotor layer 20, and the fastening bolt 50 is threadedly connected to the two end plates 60 to lock the two end plates 60. Specifically, the axial brushless motor is formed as a whole through the limitation of the two end plates 60. When the number of stator layers 30 and rotor layers 20 needs to be increased or decreased, it is only necessary to first disassemble the end plate 60 on one side, and then adaptively add or reduce the stator layer 30, the rotor layer 20 and the transmission shaft 11.

[0046] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An axial brushless motor, characterized in that: include: Output shaft; At least one rotor layer, each of which is sleeved on the output shaft and can drive the output shaft to rotate by rotating, and the rotor layer is provided with N-pole permanent magnets and S-pole permanent magnets alternately spaced in the circumferential direction; and At least one stator layer, each of the stator layers is sleeved on the output shaft and arranged with the rotor layer along the axial direction of the output shaft, and a plurality of spaced armature windings are arranged in the circumferential direction of the stator layer.

2. The axial brushless motor according to claim 1, characterized in that: The axial brushless motor includes a rotor layer and a stator layer, wherein the rotor layer is located on one side of the stator layer.

3. The axial brushless motor according to claim 1, characterized in that: The axial brushless motor comprises a rotor layer and two stator layers, and the two stator layers are respectively located on both sides of the rotor layer.

4. The axial brushless motor according to claim 1, characterized in that: The axial brushless motor comprises two rotor layers and one stator layer, and the two rotor layers are respectively located on both sides of the stator layer.

5. The axial brushless motor according to claim 1, characterized in that: The axial brushless motor comprises two or more rotor layers and two or more stator layers, and each of the rotor layers and each of the stator layers are arranged alternately.

6. The axial brushless motor according to any one of claims 1 to 5, characterized in that: The output shaft comprises at least one transmission shaft, and the transmission shaft comprises a stator connecting section and a rotor connecting section connected to the stator connecting section, the stator connecting section is sleeved with one of the stator layers, and the rotor connecting section is sleeved with one of the rotor layers.

7. The axial brushless motor according to claim 6, characterized in that: The transmission shaft also includes a plug connector, which is connected to the rotor connecting section. The end surface of the stator connecting section is provided with a plug hole adapted to the plug connector, and each transmission shaft can be plugged into the plug hole of another transmission shaft through the plug connector.

8. The axial brushless motor according to claim 6, characterized in that: The outer diameter of the rotor connecting section is smaller than the outer diameter of the stator connecting section.

9. The axial brushless motor according to claim 6, characterized in that: The stator connecting section is provided with transmission teeth, and the inner side of the rotor layer is meshed with the transmission teeth.

10. The axial brushless motor according to claim 6, characterized in that: The output shaft also includes a connecting pin, and the connecting pin is threadedly connected to each section of the transmission shaft.

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