Motor and unmanned aerial vehicle

Abstract

The present disclosure relates to a motor and an unmanned aerial vehicle. The motor comprises a motor shaft and multiple bearings, each bearing comprises a first main body portion and a second main body portion, and the first main body portion is sleeved on the motor shaft and can rotate relative to the second main body portion along with the motor shaft. A first magnetic assembly is provided between the first main body portions of every two adjacent bearings, and a second magnetic assembly is provided between the second main body portions of every two adjacent bearings; the first magnetic assembly and the second magnetic assembly are both magnetized in the axial direction of the motor and have opposite magnetization directions; when the motor receives an axial force, the first magnetic assembly and the second magnetic assembly carry out relative displacement, so that a reverse restoring force is generated between the first magnetic assembly and the second magnetic assembly, thereby reducing the axial force received by the bearings. First magnetically conductive members are provided at both ends of each of the first magnetic assembly and the second magnetic assembly, so that the possibility of magnetic flux leakage is reduced, the magnetic force between the first magnetic assembly and the second magnetic assembly is improved, and the restoring force generated between the first magnetic assembly and the second magnetic assembly can counteract the axial force received by the motor.

Description

Motor and drone Technical Field

[0001] The present disclosure relates to the technical field of power devices, and in particular to a motor and a drone. Background Art

[0002] The drone's propulsion system consists of a motor and propellers. The propellers, when rotating, exert aerodynamic forces on the motor, generating significant axial forces. These periodic axial and radial forces can significantly impact bearing life. Therefore, preloading the inner and outer rings of the bearings is typically performed using wave washers or wave springs to eliminate play and reduce bearing wear.

[0003] Summary of the Invention

[0004] The present disclosure provides a motor and a drone, which are used to solve the problem that a bearing cannot provide a corresponding reverse force when subjected to a large axial force.

[0005] An embodiment of the present disclosure provides a motor, which includes: a motor shaft; a plurality of bearings, which are sleeved on the motor shaft and arranged at intervals along the axial direction of the motor; wherein each of the bearings includes a first main body and a second main body, the first main body is sleeved on the motor shaft and can rotate relative to the second main body, a first magnetic component is arranged between the first main bodies of two adjacent bearings, and a second magnetic component is arranged between the second main bodies of two adjacent bearings, and the first magnetic component and the second magnetic component are both magnetized along the axial direction of the motor; along the radial direction of the motor, the magnetization directions of the corresponding positions of the first magnetic component and the second magnetic component are opposite, and first magnetic conductive parts are provided at both ends of the first magnetic component along the axial direction of the motor and at both ends of the second magnetic component along the axial direction of the motor.

[0006] In some embodiments, a gap is provided between the first magnetic assembly and the second magnetic assembly along a radial direction of the motor.

[0007] In some embodiments, the first magnetic assembly includes an inner magnetic ring, the second magnetic assembly includes an outer magnetic ring, and the inner magnetic ring and the outer magnetic ring have opposite magnetization directions.

[0008] In some embodiments, the first magnetic component and the second magnetic component each include a plurality of first magnetic rings and a plurality of second magnetic rings, and the magnetization directions of the first magnetic rings and the second magnetic rings are opposite; along the axial direction of the motor, the plurality of first magnetic rings in the first magnetic component and the plurality of second magnetic rings in the first magnetic component are alternately arranged, and the plurality of first magnetic rings in the second magnetic component and the plurality of second magnetic rings in the second magnetic component are alternately arranged; along the radial direction of the motor, the first magnetic rings in the first magnetic component and the second magnetic rings in the second magnetic component are correspondingly arranged.

[0009] In some embodiments, the second magnetic conductive member is disposed between the first magnetic ring and the second magnetic ring adjacent to the first magnetic ring.

[0010] In some embodiments, the motor further includes a stator and a rotor, the stator is provided with a winding, the rotor is provided with a magnetic pole, and when power is applied to the winding, the rotor can rotate relative to the stator, and the motor shaft is connected to the rotor.

[0011] In some embodiments, the motor further includes a bearing seat, which is connected to the stator and is provided with an accommodating cavity, wherein the multiple bearings are located in the accommodating cavity, and the second main body and the second magnetic component are both connected to the side wall of the accommodating cavity.

[0012] In some embodiments, the motor shaft can extend into the accommodating cavity, and the first magnetic component is fixedly connected to the motor shaft.

[0013] In some embodiments, the bearing is a deep groove ball bearing.

[0014] An embodiment of the present disclosure further provides a drone, comprising a motor and propellers, wherein the motor is any one of the motors described above, and the propellers are mounted on the motor shaft.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of a motor provided in an embodiment of the present disclosure.

[0017] FIG2 is a cross-sectional view of a motor provided in an embodiment of the present disclosure.

[0018] FIG3 is a partial enlarged view of position I in FIG2 .

[0019] FIG4 is a cross-sectional view of a first magnetic component and a second magnetic component provided in the first embodiment of the present disclosure.

[0020] FIG5 is a graph showing the axial displacement-axial restoring force of the motor provided in the first embodiment of the present disclosure.

[0021] FIG6 is a cross-sectional view of a first magnetic component and a second magnetic component provided in the second embodiment of the present disclosure.

[0022] FIG7 is a graph showing the axial displacement-axial restoring force of the motor provided in the second embodiment of the present disclosure.

[0023] FIG8 is an exploded view of a motor provided in an embodiment of the present disclosure.

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure. DETAILED DESCRIPTION

[0025] In order to better understand the technical solution of the present disclosure, the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0026] It should be clear that the embodiments described are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0027] The terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. The singular forms "a," "an," "the," and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present disclosure are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present disclosure. In addition, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" of another element, it can not only be directly connected "upper" or "lower" of the other element, but also be indirectly connected "upper" or "lower" of the other element through an intermediate element.

[0030] The drone propulsion system consists of a motor and propellers. The propellers, when rotating, generate significant axial forces on the motor through aerodynamic forces. These periodic axial and radial forces can significantly impact bearing life. Therefore, wave washers or wave springs are typically used to preload the inner and outer races of the bearings to eliminate play and reduce bearing wear. However, when the propeller generates significant axial forces, these wave washers or springs may not be able to provide adequate counterforce. Therefore, a novel structure or technology is needed to replace the elastic element.

[0031] An embodiment of the present disclosure provides a drone, wherein the power system of the drone includes a motor and propellers. The propellers are installed at the output end of a motor shaft 1 in the motor, and the rotation of the propellers provides power to the drone.

[0032] The propeller blades are mounted on motor shaft 1. When the propeller blades rotate, aerodynamic forces exert an axial force on the motor. A drone has forward and backward propeller blades. During flight, the airflow relative to the forward and backward propeller blades differs significantly. This speed difference creates a significant alternating load on the propeller blades, which in turn changes the axial force exerted on the motor.

[0033] As shown in Figures 1, 2, and 3, an embodiment of the present disclosure provides a motor comprising a motor shaft 1 and a plurality of bearings 2. The plurality of bearings 2 are sleeved on the motor shaft 1 and spaced apart along the axial direction of the motor. Each bearing 2 comprises a first main body 21 and a second main body 22, wherein the second main body 22 is sleeved on the first main body 21, and the first main body 21 is fixedly connected to the motor shaft 1. When the motor shaft 1 rotates, the first main body 21 is driven to rotate relative to the second main body 22. A first magnetic component 3 is disposed between the first main bodies 21 of two adjacent bearings 2, and a second magnetic component 4 is disposed between the second main bodies 22 of two adjacent bearings 2. The first magnetic component 3 and the second magnetic component 4 are both magnetized along the axial direction of the motor. Along the radial direction of the motor, the magnetization directions of the corresponding positions of the first magnetic component 3 and the second magnetic component 4 are opposite. For example, along the axial direction of the motor, if the upper end of the first magnetic component 3 is an S pole and the lower end is an N pole, then the corresponding position of the second magnetic component 4 is an N pole and the lower end is an S pole. First magnetic conductive members 5 are provided at both ends of the first magnetic component 3 and the second magnetic component 4 along the axial direction of the motor, and are connected to the bearing 2 through the first magnetic conductive members 5 .

[0034] A propeller can be mounted on the top of the motor shaft 1, which drives the propeller to rotate, thereby providing power to the device equipped with the motor. As the propeller rotates, the aerodynamic force passing through it generates an axial force on the motor. For example, two bearings 23 and 24 are provided in the motor. The first bearing 23 and the second bearing 24 are spaced apart along the axial direction of the motor. Ball bearings are provided in both the first bearing 23 and the second bearing 24, creating a gap between the first body 21 and the second body 22, allowing relative axial movement between the first body 21 and the second body 22. If an elastic member is provided on the bearing, the elastic member can generate an axial preload on the bearing, eliminating the gap between the first body 21 and the second body 22. When the propeller applies an axial force to the motor, the preload generated by the elastic member can counteract the force from the propeller, reducing the axial force on the motor. However, if the axial force generated by the propeller on the motor is large, the elastic member may not be able to provide a significant counteracting force. Furthermore, the preload applied to the bearing by this solution can only counteract axial forces in a single direction. Specifically, when the blades do not apply an axial force to the motor, the preload force generated by the elastic member still exists, causing the motor to be subjected to a larger axial force generated by the elastic member.

[0035] In the embodiment of the present disclosure, a first magnetic component 3 and a second magnetic component 4 are provided between the first bearing 23 and the second bearing 24. The polarities of the first magnetic component 3 and the second magnetic component 4 are opposite in the radial direction of the motor. Along the axial direction of the motor, when the blades do not apply an axial force to the motor, the attraction between the first magnetic component 3 and the second magnetic component 4 causes the first body portion 21 and the second body portion 22 to maintain their initial positions, and no axial force is generated in the motor. When the blades apply an axial force to the motor, the first body portion 21 or the second body portion 22 moves along the axial direction of the motor, and the first magnetic component 3 and the second magnetic component 4 are staggered. An axial restoring force is generated by the magnetic force between the first magnetic component 3 and the second magnetic component 4. This restoring force is opposite in direction to the axial force applied by the blades to the motor, thereby reducing the axial force applied to the motor and improving the service life of the motor. At the same time, along the axial direction of the motor, the movement of the first magnetic component 3 and the second magnetic component 4 in either direction can generate an axial restoring force, thereby increasing the range of use of the motor.

[0036] A first magnetic conductive part 5 is provided at both ends of the first magnetic component 3 and the second magnetic component 4 along the axial direction of the motor. The first magnetic conductive part 5 at the upper end, the first magnetic component 3, the first magnetic conductive part 5 at the lower end and the second magnetic component 4 form a closed magnetic circuit, which can reduce the possibility of magnetic leakage of the first magnetic component 3 and the second magnetic component 4, and is conducive to increasing the magnetic force that can be generated between the first magnetic component 3 and the second magnetic component 4, so that the restoring force generated between the first magnetic component 3 and the second magnetic component 4 can resist the axial force of the blade on the motor.

[0037] In the embodiment of the present disclosure, the magnetization amount of the first magnetic component 3 and the second magnetic component 4 can be adjusted to adjust the magnitude of the magnetic force between the first magnetic component 3 and the second magnetic component 4, so as to adjust the magnitude of the maximum restoring force that can be generated between the first magnetic component 3 and the second magnetic component 4, so that the maximum restoring force generated between the first magnetic component 3 and the second magnetic component 4 is greater than or equal to the axial force of the blade on the motor.

[0038] In addition, the first magnetic component 3 and the second magnetic component 4 need to be placed in a magnetizing jig for magnetization. Since the first magnetic component 3 and the second magnetic component 4 are both annular, if magnetized radially, the magnetizing jig needs to be adjusted according to the diameter of the first magnetic component 3 and the second magnetic component 4, and the magnetization process is relatively complicated; if magnetized axially, the magnetization jig is more universal and the magnetization process is relatively simple.

[0039] As shown in Figures 2 and 3, in some embodiments, a gap exists between the first magnetic assembly 3 and the second magnetic assembly 4 along the radial direction of the motor. Furthermore, a gap also exists between the first magnetic permeable members located at both ends of the first magnetic assembly 3 and the first magnetic permeable members located at both ends of the second magnetic assembly 4 along the axial direction of the motor. For example, along the axial direction of the motor, a gap exists between the first magnetic permeable member located at the upper end of the first magnetic assembly 3 and the first magnetic permeable member located at the upper end of the second magnetic assembly 4; and a gap exists between the first magnetic permeable member located at the lower end of the first magnetic assembly 3 and the first magnetic permeable member located at the lower end of the second magnetic assembly 4.

[0040] The first magnetic assembly 3 is connected to the first main body 21 of two adjacent bearings 2 at its two axial ends. The second magnetic assembly 4 is connected to the second main body 22 of two adjacent bearings 2 at its two axial ends. During motor operation, the first main body 21 rotates relative to the second main body 22, and therefore the first magnetic assembly 3 rotates relative to the second magnetic assembly 4. Therefore, a gap is provided between the first and second magnetic assemblies 3, 4 to reduce friction between them and help lower the motor's energy consumption.

[0041] As shown in Figure 4, in some embodiments, the first magnetic component 3 includes an inner magnetic ring 31, and along the axial direction of the motor, the two ends of the inner magnetic ring 31 are respectively connected to the first magnetic conductive parts 5 located at the two ends of the first magnetic component 3; accordingly, the second magnetic component 4 includes an outer magnetic ring 41, and the magnetism of the outer magnetic ring 41 is opposite to the magnetism of the inner magnetic ring 31, and along the axial direction of the motor, the two ends of the outer magnetic ring 41 are respectively connected to the first magnetic conductive parts 5 located at the two ends of the second magnetic component 4.

[0042] When the inner magnetic ring displaces relative to the outer magnetic ring along the motor's axial direction, a reverse force is generated between inner magnetic ring 31 and outer magnetic ring 41. As shown in Figure 5, when the relative axial displacement of inner magnetic ring 31 and outer magnetic ring 41 is 100 μm, a reverse force of 0.06 N is generated. This reverse force increases with the relative displacement.

[0043] As shown in FIG6 , in some embodiments, the first magnetic assembly 3 includes a plurality of first magnetic rings 32 and second magnetic rings 33, which are alternately arranged along the axial direction of the motor. The second magnetic assembly 4 also includes a plurality of first magnetic rings 32 and second magnetic rings 33, which are alternately arranged along the axial direction of the motor. The first magnetic rings 32 and second magnetic rings 33 have opposite magnetization directions. The number and thickness of the first magnetic rings 32 in the second magnetic assembly 4 are consistent with the number and thickness of the second magnetic rings 33 in the first magnetic assembly 3, and the number and thickness of the second magnetic rings 33 in the second magnetic assembly 4 are consistent with the number and thickness of the first magnetic rings 32 in the first magnetic assembly 3. In the radial direction of the motor, the first magnetic rings 32 in the second magnetic assembly 4 are arranged correspondingly to the second magnetic rings 33 in the first magnetic assembly 3, and the second magnetic rings 33 in the second magnetic assembly 4 are arranged correspondingly to the first magnetic rings 32 in the first magnetic assembly 3.

[0044] Along the axial direction of the motor, the distance between adjacent bearings 2 is constant. If multiple first and second magnetic rings 32, 33 are disposed between adjacent bearings 2, as the number of first and second magnetic rings 32, 33 increases, the thickness of the first and second magnetic rings 32, 33 gradually decreases, and the axial restoring force generated between the radially corresponding first and second magnetic rings 32, 33 in the motor gradually increases. Therefore, disposing multiple groups of radially corresponding first and second magnetic rings 32, 33 between adjacent bearings 2 along the axial direction of the motor can further increase the axial restoring force generated by the first and second magnetic assemblies 3, 4, enabling the motor to withstand stronger axial forces.

[0045] As shown in FIG. 6 , in some embodiments, a second magnetic conductive member 34 is provided between adjacent first magnetic rings 32 and second magnetic rings 33 along the axial direction of the motor.

[0046] The second magnetic conductive member 34 can enhance the magnetism at both ends of the first magnetic ring 32 and the second magnetic ring 33, and can enhance the axial restoring force that can be generated between the first magnetic ring 32 and the second magnetic ring 33 arranged radially correspondingly, thereby enhancing the axial restoring force that can be generated between the first magnetic component 3 and the second magnetic component 4.

[0047] For example, as shown in Figure 7, along the axial direction of the motor, the first magnetic component 3 and the second magnetic component 4 both include four first magnetic rings 32 and four second magnetic rings 33 arranged alternately, and a second magnetic conductive member 34 is provided between adjacent first magnetic rings 32 and second magnetic rings 33. If the first main body 21 in two adjacent bearings 2 is displaced 100 μm in the axial direction relative to the second main body 22, the first magnetic component 3 and the second magnetic component 4 can generate an axial restoring force of about 20 N, thereby enabling the motor to withstand stronger axial forces.

[0048] The greater the number of first magnetic rings 32 and second magnetic rings 33, and the smaller their axial dimensions, the greater the axial restoring force generated by first magnetic assembly 3 and second magnetic assembly 4. The number and axial dimensions of first magnetic rings 32 and second magnetic rings 33 can be adjusted based on the maximum force exerted by the propeller blades on the motor, so that the maximum axial restoring force generated between first magnetic assembly 3 and second magnetic assembly 4 is greater than the maximum force exerted by the propeller blades on the motor.

[0049] In some embodiments, the bearing 2 may be a deep groove ball bearing, with balls disposed between the first body portion 21 and the second body portion 22 to facilitate rotation of the first body portion 21 relative to the second body portion 22 .

[0050] Deep groove ball bearings have the characteristics of low friction coefficient and high speed. The low friction coefficient can reduce the energy consumed when the bearing 2 rotates, which is beneficial to reducing the energy consumption of the motor. Under the same force, the speed of the deep groove ball bearing is higher.

[0051] As shown in FIG8 , in some embodiments, the motor further includes a stator 6 and a rotor 7. The stator 6 is provided with a winding 61, and the rotor 7 is provided with a magnetic pole 71. When current is passed through the winding 61, a magnetic field is generated, causing the magnetic pole 71 to rotate around the winding 61, thereby driving the rotor 7 to rotate relative to the stator 6. The motor shaft 1 is fixedly connected to the rotor 7 and is located at the position of the rotation axis of the rotor 7. The first main body 21 of the bearing 2 is connected to the motor shaft 1, and the second main body 22 is connected to the stator 6. The first main body 21 can rotate relative to the second main body 22 along with the motor shaft 1.

[0052] The relative rotation of the stator 6 and the rotor 7 can drive the motor shaft 1 to rotate, so that the motor shaft 1 drives the blades to rotate, providing power for the drone.

[0053] As shown in Figures 2 and 8, in some embodiments, the motor further includes a bearing seat 8, which is coaxially disposed and fixedly connected to the stator 6. Multiple bearings 2 are located within a receiving cavity 81 of the bearing seat 8, into which the motor shaft 1 can extend. The first main body 21 and the first magnetic assembly 3 are both connected to the motor shaft 1. The second main body 22 and the second magnetic assembly 4 are both connected to the sidewall of the bearing seat 8.

[0054] Along the radial direction of the motor, the motor shaft 1 limits the position of the first magnetic component 3, and the bearing seat 8 limits the position of the second magnetic component 4, so that there is a gap between the first magnetic component 3 and the second magnetic component 4. When the first main body 21 and the second main body 22 rotate relative to each other, the possibility of mutual interference between the first magnetic component 3 and the second magnetic component 4 is reduced, which is beneficial to improving the stability of the motor shaft 1 during rotation.

[0055] The present disclosure provides a motor and a drone. The motor includes a motor shaft 1 and a plurality of bearings 2. Each bearing 2 includes a first main body 21 and a second main body 22. The first main body 21 is sleeved on the motor shaft 1 and can rotate relative to the second main body 22 along the axial direction of the motor. A first magnetic component 3 is provided between the first main bodies 21 of two adjacent bearings 2, and a second magnetic component 4 is provided between the second main bodies 22 of two adjacent bearings 2. The first magnetic component 3 and the second magnetic component 4 are both magnetized along the axial direction of the motor, and the magnetization directions of the radially corresponding positions are opposite. In this way, when the motor is subjected to an axial force, the first magnetic component 3 and the second magnetic component 4 will undergo relative displacement, so that an axial restoring force will be generated between the first magnetic component 3 and the second magnetic component 4, which can effectively reduce the axial force applied to the motor. A first magnetic conductive member 5 is provided at both ends of the first magnetic component 3 and the second magnetic component 4 along the axial direction of the motor, which reduces the possibility of magnetic leakage of the first magnetic component 3 and the second magnetic component 4, increases the magnetic force between the first magnetic component 3 and the second magnetic component 4, and enables the restoring force generated by them to resist the axial force applied to the motor.

[0056] The foregoing description is merely a few embodiments of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A motor, characterized in that: The motor comprises: Motor shaft (1); A plurality of bearings (2), wherein the plurality of bearings (2) are sleeved on the motor shaft (1) and are spaced apart along the axial direction of the motor; Each of the bearings (2) comprises a first main body portion (21) and a second main body portion (22). The first main body (21) is sleeved on the motor shaft (1) and is rotatable relative to the second main body (22). A first magnetic component (3) is arranged between the first main body parts (21) of two adjacent bearings (2), and a second magnetic component (4) is arranged between the second main body parts (22) of two adjacent bearings (2). The first magnetic component (3) and the second magnetic component (4) are both magnetized along the axial direction of the motor; Along the radial direction of the motor, the magnetization directions of the positions corresponding to the first magnetic component (3) and the second magnetic component (4) are opposite, First magnetic conductive parts (5) are provided at both ends of the first magnetic component (3) along the axial direction of the motor and at both ends of the second magnetic component (4) along the axial direction of the motor.

2. The motor according to claim 1, characterized in that Along the radial direction of the motor, there is a gap between the first magnetic component (3) and the second magnetic component (4).

3. The motor according to claim 1, characterized in that The first magnetic component (3) comprises an inner magnetic ring (31), and the second magnetic component (4) comprises an outer magnetic ring (41), wherein the magnetization directions of the inner magnetic ring (31) and the outer magnetic ring (41) are opposite.

4. The motor according to claim 1, characterized in that The first magnetic component (3) and the second magnetic component (4) each comprise a plurality of first magnetic rings (32) and a plurality of second magnetic rings (33), The magnetization directions of the first magnetic ring (32) and the second magnetic ring (33) are opposite; Along the axial direction of the motor, the plurality of first magnetic rings (32) in the first magnetic component (3) and the plurality of second magnetic rings (33) in the first magnetic component (3) are arranged alternately, and the plurality of first magnetic rings (32) in the second magnetic component (4) and the plurality of second magnetic rings (33) in the second magnetic component (4) are arranged alternately; Along the radial direction of the motor, the first magnetic ring (32) in the first magnetic component (3) and the second magnetic ring (33) in the second magnetic component (4) are arranged correspondingly.

5. The motor according to claim 4, characterized in that A second magnetic conductive member (34) is provided between the first magnetic ring (32) and the second magnetic ring (33) adjacent to the first magnetic ring (32).

6. The motor according to claim 4, characterized in that The number and thickness of the first magnetic rings (32) in the second magnetic component (4) are consistent with the number and thickness of the second magnetic rings (33) in the first magnetic component (3), The number and thickness of the second magnetic rings (33) in the second magnetic component (4) are consistent with the number and thickness of the first magnetic rings (32) in the first magnetic component (3).

7. The motor according to claim 1, characterized in that The motor further comprises a stator (6) and a rotor (7). The stator (6) is provided with a winding (61). The rotor (7) is provided with magnetic poles (71). When electricity is supplied to the winding (61), the rotor (7) can rotate relative to the stator (6), and the motor shaft (1) is connected to the rotor (7).

8. The motor according to claim 7, characterized in that The first main body (21) of each bearing (2) is connected to the motor shaft (1), The second main body (22) of each bearing (2) is connected to the stator (6).

9. The motor according to claim 7, characterized in that The motor further comprises a bearing seat (8), The bearing seat (8) is connected to the stator (6) and is provided with a receiving cavity (81). The plurality of bearings (2) are all located in the accommodating cavity (81), The second main body (22) and the second magnetic component (4) are both connected to the side wall of the accommodating cavity (81).

10. The motor according to claim 9, characterized in that The motor shaft (1) can extend into the accommodating cavity (81), and the first magnetic component (3) is fixedly connected to the motor shaft (1).

11. The motor according to claim 9, characterized in that The bearing seat (8) is coaxially arranged with the stator (6).

12. The electric machine according to any one of claims 1 to 11, characterized in that The bearing (2) is a deep groove ball bearing.

13. A drone, comprising a motor and propeller blades, characterized in that: The motor is the motor according to any one of claims 1 to 12, and the blades are mounted on the motor shaft (1).

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