Motor and unmanned aerial vehicle

Abstract

This application relates to the field of motor technology, and particularly discloses a motor and a drone. The motor includes a rotor assembly and a stator assembly. The rotor assembly includes a rotor support and a shaft body. The rotor support includes a fixed portion, a connecting portion, and a support portion. The support portion is disposed outside the fixed portion. Multiple connecting portions are spaced apart, with a first included angle between two connecting portions. The connecting portion connects the fixed portion and the support portion and is provided with a vibration-damping groove. The stator assembly includes a stator base, a fixed bearing, and a rotating bearing. The stator base is mounted on the rotating bearing. The fixed portion and the fixed bearing clamp and fix the rotating bearing. The rotating bearing is mounted on the shaft body. A gap exists between the stator base and the support portion. Through the above structure, a first included angle exists between each connecting portion, and a vibration-damping groove is provided, so that the vibration frequency of the electromagnetic excitation force is staggered with the vibration frequency of the rotor assembly, thereby reducing the electromagnetic coupling resonance with the structure and protecting the motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a motor and an unmanned aerial vehicle (UAV). Background Technology

[0002] An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. There are many types of electric motors, but brushless motors are the most commonly used in drone applications. Brushless motors have good linearity in their mechanical and adjustment characteristics, a wide speed range, long lifespan, convenient maintenance, and low noise.

[0003] The electromagnetic reaction of a brushless motor generates periodically fluctuating electromagnetic excitation forces. When the frequency and mode shape of the electromagnetic excitation force overlap with the frequency and mode shape of the structure, electromagnetic coupling resonance occurs. This resonance produces significant resonant noise, posing a high risk of structural fracture in the short term, or, after a period of operation, risks of crack damage, abrasion, and other issues.

[0004] In the process of developing this application, the inventors discovered that current brushless motors mainly consist of a rotor, windings, a crankshaft, a stator assembly, and bearings. The bearings and rotor are fixed at both ends of the crankshaft, the stator assembly is located around the crankshaft, and the windings are located between the stator assembly and the rotor. The motor works by rotating the rotor. However, the sealed top support of the rotor causes electromagnetic and structural coupling resonance to easily occur during the increase of the brushless motor's speed, which damages the motor structure. Summary of the Invention

[0005] This application provides a motor and a drone that can improve the current situation where the closed top support of the rotor causes electromagnetic and structural coupling resonance to easily occur during the increase of the speed of the brushless stage, thus damaging the motor structure.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution: A motor is provided. The motor includes a rotor assembly and a stator assembly. The rotor assembly includes a rotor support and a shaft body. The rotor support includes a fixing part, multiple connecting parts, and a support part. The support part is arranged in a ring shape outside the fixing part. The multiple connecting parts are spaced apart, with a first angle between one connecting part and another. One end of each connecting part is connected to the fixing part, and the other end of each connecting part is connected to the support part. The connecting part has a vibration damping groove recessed within it. The stator assembly includes a stator seat, a fixed bearing, and a rotating bearing. The stator seat is mounted on the side of the rotating bearing opposite to the shaft body. The fixed bearing and the fixing part are disposed at both ends of the shaft body. The rotating bearing is mounted on the shaft body. The fixing part and the fixed bearing clamp and fix the rotating bearing. A gap exists between the stator seat and the support part.

[0007] Optionally, the number of connecting parts is four, and the first included angle between one connecting part and another is 90°; or, the number of connecting parts is six, and the first included angle between one connecting part and another is 60°; or, the number of connecting parts is eight, and the first included angle between one connecting part and another is 45°; or, the number of connecting parts is ten, and the first included angle between one connecting part and another is 36°; or, the number of connecting parts is sixteen, and the first included angle between one connecting part and another is 22.5°.

[0008] Optionally, the vibration damping groove is disposed in the middle of the connecting part, and the bottom of the vibration damping groove is arc-shaped; or, the vibration damping groove has a first inclined part, a groove bottom and a second inclined part, the first inclined part is disposed near the fixing part, the second inclined part is disposed near the bracket part, the groove bottom is disposed between the first inclined part and the second inclined part, the first inclined part and the groove bottom have a second included angle, and the second inclined part and the groove bottom have a third included angle.

[0009] Optionally, the vibration damping groove is disposed on the side of the connecting portion away from the stator base, and the vibration damping groove is disposed close to the stator base along the direction in which the rotating shaft body is disposed; or, the vibration damping groove is disposed on the side of the connecting portion close to the stator base, and the vibration damping groove is disposed away from the stator base along the direction in which the rotating shaft body is disposed.

[0010] Optionally, the connecting portion further includes a first protrusion and a second protrusion; the first protrusion is disposed between the connecting portion and the fixing portion, and the first protrusion protrudes from the fixing portion toward the bracket portion; the second protrusion is disposed between the connecting portion and the bracket portion, and the second protrusion protrudes from the bracket portion away from the stator seat along the direction of the rotating shaft body; the connecting portion is mounted on the first protrusion and the second protrusion.

[0011] Optionally, the motor further includes a protective cover plate, which is disposed on the first protrusion and the second protrusion. There is a gap between the protective cover plate and the bracket portion, and the protective cover plate is screwed to the second protrusion.

[0012] Optionally, the fixing part is further provided with a plurality of first through holes, the first through holes penetrating the fixing part along the direction of the rotating shaft body, and the plurality of first through holes surrounding the rotating shaft body.

[0013] Optionally, the fixing part is provided with an abutment portion, which is located on the side of the fixing part close to the fixed bearing along the direction of the rotating shaft body. The stator seat has a first abutment surface and a second abutment surface perpendicular to the direction of the rotating shaft body. The rotating bearing includes a first bearing and a second bearing. The first bearing is disposed between the first abutment surface and the abutment portion, with the inner ring of the first bearing abutting against the abutment portion and the outer ring of the first bearing abutting against the first abutment surface; the second bearing is disposed between the second abutment surface and the fixed bearing, with the inner ring of the second bearing abutting against the fixed bearing and the outer ring of the second bearing abutting against the second abutment surface.

[0014] Optionally, the stator assembly further includes a winding. The rotor assembly further includes a magnetic sheet and a rotor housing, the rotor housing being fixed to the bracket portion, the magnetic sheet being mounted on the rotor housing, and the winding being disposed between the magnetic sheet and the stator base.

[0015] To address the aforementioned technical problems, another technical solution adopted in this application is to provide a drone. The drone includes the aforementioned motor, which provides power to the drone.

[0016] The beneficial effects of this application embodiment are as follows: Unlike the prior art, this application embodiment provides a motor. The motor includes a rotor assembly and a stator assembly. The rotor assembly includes a rotor support and a shaft body. The rotor support includes a fixing part, multiple connecting parts, and a support part. The support part is arranged in a ring shape outside the fixing part. The multiple connecting parts are spaced apart, with a first included angle between one connecting part and another. One end of each connecting part is connected to the fixing part, and the other end of each connecting part is connected to the support part. The connecting part has a concave damping groove. The stator assembly includes a stator seat, a fixed bearing, and a rotating bearing. The stator seat is installed on the side of the rotating bearing away from the shaft body. The fixed bearing and the fixing part are located at both ends of the shaft body. The rotating bearing is installed on the shaft body. The fixing part and the fixed bearing clamp and fix the rotating bearing. There is a gap between the stator seat and the support part. With the above structure, the first included angle exists between each of the connecting parts, and the vibration damping groove is provided, thereby reducing the vibration generated by the bracket part during the operation of the motor, so that the vibration frequency of the electromagnetic excitation force is staggered with the vibration frequency of the rotor assembly, thereby reducing the coupling resonance between the electromagnetic field and the structure and protecting the motor structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0018] Figure 1 This is a perspective view of a motor provided in one embodiment of this application; Figure 2 This is an exploded view of a motor provided in one embodiment of this application; Figure 3 This is provided by one embodiment of the present application. Figure 1 A-side cross-sectional view; Figure 4 This is a cross-sectional schematic diagram of a motor provided in another embodiment of this application; Figure 5 This is a cross-sectional schematic diagram of a motor provided in another embodiment of this application.

[0019] The reference numerals for motor 1000 are as follows: Detailed Implementation

[0020] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0022] Currently, judging from market trends, the application of external rotor brushless motors is becoming increasingly widespread. Application scenarios for external rotor brushless motors include: drones, fresh air systems, forced exhaust fans, and portable air conditioners. For drones, users are also placing increasingly higher demands on the product's lifespan, safety, and noise level.

[0023] A significant source of safety and noise hazards in many drone products on the market is the power system, specifically the drive output of the propeller-external brushless motor-motor controller system. Among these, electromagnetic-structural coupling noise is the most complex and dangerous.

[0024] Electromagnetic-structural coupling refers to the periodic fluctuations in electromagnetic excitation force generated by the electromagnetic reaction of the motor, which extends radially along the rotor to the outer ring of the rotor containing the magnet. The magnitude of structural resonance is related to the excitation force energy, the structural damping and mechanical damping of the structure itself, the rigidity of the structure and its rigidity distribution, etc. The structure of the motor will also vibrate when subjected to excitation from outside the motor. When the frequency and mode shape of the electromagnetic excitation force overlap with the frequency and mode shape of the structure, electromagnetic-structural coupling resonance will occur.

[0025] The inventors noted that during the operation of the external rotor brushless motor, the external rotor support structure is prone to electromagnetic-structural coupling noise vibration with the first four frequencies of the electromagnetic excitation force as the operating speed increases or decreases. Generally speaking, such vibration coupling is likely to occur in the first four to six frequencies of the electromagnetic excitation force. This coupling vibration can easily cause the motor structure to break, thereby affecting the flight safety of the drone and the user's flight experience.

[0026] Based on the above considerations, in order to improve the current situation where the sealed top support of the magnetic sheet easily causes electromagnetic and structural coupling resonance during the increase of the brushless stage speed, which damages the motor structure, this application provides a motor and a drone, as detailed below.

[0027] In this application embodiment, a drone is provided, which includes propellers, a motor 1000 and a fuselage. The propellers are mounted on the motor 1000 and the motor 1000 is mounted on the fuselage. The rotation of the motor 1000 drives the propellers to rotate, thereby enabling the fuselage to perform flight missions.

[0028] For the aforementioned motor 1000, please refer to Figures 1 to 3The motor 1000 includes a rotor assembly 100 and a stator assembly 200. The rotor assembly 100 includes a rotor support 110 and a shaft body 140. The rotor support 110 includes a fixing part 111, a plurality of connecting parts 112 and a support part 113. The support part 113 is arranged in a ring outside the fixing part 111. The plurality of connecting parts 112 are spaced apart. There is a first included angle between one connecting part 112 and another connecting part 112. One end of each connecting part 112 is connected to the fixing part 111, and the other end of each connecting part 112 is connected to the support part 113. The connecting part 112 is recessed and provided with a vibration damping groove 1121. The stator assembly 200 includes a stator base 230, a fixed bearing 250, and a rotating bearing 260. The stator base 230 is mounted on the side of the rotating bearing 260 away from the shaft body 140. The fixed bearing 250 and a fixing part 111 are disposed at both ends of the shaft body 140. The rotating bearing 260 is mounted on the shaft body 140. The fixing part 111 and the fixed bearing 250 clamp and fix the rotating bearing 260. There is a gap between the stator base 230 and the support part 113. Through the above structure, each connecting part 112 has a first included angle and is provided with a vibration damping groove 1121, thereby reducing the vibration generated by the support part 113 during the operation of the motor 1000, so that the vibration frequency of the electromagnetic excitation force is staggered with the vibration frequency of the rotor assembly 100, thereby reducing the electromagnetic coupling resonance with the structure and protecting the structure of the motor 1000. It is understandable that when the electromagnetic force generates vibration excitation on the support part 113, the radial component of the electromagnetic force will be transmitted to the fixing part 111 along the connecting part 112. The connecting part 112, which is provided with vibration damping groove 1121, can buffer the radial component of the electromagnetic force and the structural vibration, thereby making the vibration frequency of the electromagnetic excitation force different from the vibration frequency of the rotor assembly 100.

[0029] In some embodiments of this application, please refer to Figure 2The number of connecting parts 112 can be multiple, for example: four connecting parts 112, with a first included angle of 90° between one connecting part 112 and another connecting part 112; or six connecting parts 112, with a first included angle of 60° between one connecting part 112 and another connecting part 112; or eight connecting parts 112, with a first included angle of 45° between one connecting part 112 and another connecting part 112; or ten connecting parts 112, with a first included angle of 36° between one connecting part 112 and another connecting part 112; or sixteen connecting parts 112, with a first included angle of 22.5° between one connecting part 112 and another connecting part 112. Specifically, this application employs eight connecting parts 112, with a first included angle of 45° between one connecting part 112 and another connecting part 112. This design allows the first four frequencies of the rotor assembly 100 to be offset from the vibration frequency of the structure, thereby reducing structural fatigue caused by electromagnetic-structural coupling vibration, preventing the rotor support 110 from breaking and affecting the operation of the motor 1000.

[0030] In some embodiments of this application, please refer to Figures 3 to 5 In conjunction with other accompanying drawings, a vibration damping groove 1121 is disposed in the middle of the connecting portion 112, and the bottom of the groove 1121 is arc-shaped; or, the vibration damping groove 1121 has a first inclined portion 1121a, a groove bottom 1121b, and a second inclined portion 1121c. The first inclined portion 1121a is disposed near the fixing portion 111, the second inclined portion 1121c is disposed near the support portion 113, and the groove bottom 1121b is disposed between the first inclined portion 1121a and the second inclined portion 1121c. The first inclined portion 1121a and the groove bottom 1121b have a second included angle, and the second inclined portion 1121c and the groove bottom 1121b have a third included angle. Optionally, the second included angle is equal to the third included angle, and both the second and third included angles are between 160° and 130°. In some embodiments, the size of the second included angle may be different from that of the third included angle, thereby changing the structure of the vibration damping groove 1121 to adapt to motors 1000 that generate electromagnetic excitation forces of different magnitudes. It is understood that when adapting to motors 1000 with larger electromagnetic excitation forces, other reinforcing structures extending circumferentially along the support portion 113 can be provided at the second inclined portion 1121c to improve the vibration resistance of the rotor support 110.

[0031] For the vibration damping groove 1121, please refer to... Figures 3 to 5The vibration damping groove 1121 is optionally located on the side of the connecting portion 112 away from the stator base 230, and is positioned close to the stator base 230 along the direction of the rotating shaft body 140; alternatively, the vibration damping groove 1121 is located on the side of the connecting portion 112 close to the stator base 230, and is positioned away from the stator base 230 along the direction of the rotating shaft body 140. It is understood that the rotor support 110 rotates circumferentially, therefore the concave direction of the vibration damping groove 1121 cannot be positioned in the circumferential direction to prevent load on the connecting portion 112, which could cause the connecting portion 112 to break. The vibration damping groove 1121 positioned along the direction of the rotating shaft body 140 can buffer the radial transmission of electromagnetic excitation force and structural vibration while ensuring circumferential vibration damping support capacity.

[0032] Further, please refer to Figure 2 and Figure 3 The connecting portion 112 also includes a first protrusion 1122 and a second protrusion 1123, as shown in the accompanying drawings. The first protrusion 1122 is disposed between the connecting portion 112 and the fixing portion 111, and the first protrusion 1122 protrudes from the fixing portion 111 toward the support portion 113. The second protrusion 1123 is disposed between the connecting portion 112 and the support portion 113, and the second protrusion 1123 protrudes from the support portion 113 away from the stator seat 230 along the direction of the rotating shaft body 140. The connecting portion 112 is supported by the first protrusion 1122 and the second protrusion 1123. That is, in the axial direction of the rotor support 110, there is a displacement difference between the fixing part 111 and the support part 113, so that the thickness of the support part 113 will not affect the thickness of the fixing part 111, so that when the fixing part 111 is installed on the rotating shaft body 140, it has a larger contact area, thereby improving the connection strength between the rotating shaft body 140 and the fixing part 111, and improving the transmission efficiency.

[0033] In the embodiments of this application, please refer to Figure 2 and Figure 3The motor 1000 also includes a protective cover 300, which covers the first protrusion 1122 and the second protrusion 1123. A gap exists between the protective cover 300 and the support portion 113, and the protective cover 300 is screwed to the second protrusion 1123. It is important to note that the protective cover 300 is used to prevent impurities such as liquids or dust from entering the motor 1000, unlike the currently integrally formed cover with the rotor support 110. Furthermore, due to the gap between the protective cover 300 and the support portion 113, the rotor support 110 is open, thereby reducing electromagnetic excitation force and structural vibration. This differs from the existing sealed and integrally formed rotor support 110, where the electromagnetic excitation force is transmitted along the entire surface, easily generating electromagnetic-structural coupled vibration and unable to avoid the first four orders of electromagnetic excitation force vibration.

[0034] Furthermore, the protective cover 300 is provided with a insertion groove 310, which is correspondingly provided with the connecting part 112, and the connecting part 112 is inserted into the insertion groove 310 to facilitate fixing the protective cover 300.

[0035] For the aforementioned fixing part 111, please refer to Figure 2 and Figure 3 The fixing part 111 is also provided with a plurality of first through holes 1111, which penetrate the fixing part 111 along the direction of the rotating shaft body 140, and the plurality of first through holes 1111 surround the rotating shaft body 140. This further buffers the radially transmitted electromagnetic excitation force and structural vibration, and also dissipates heat from the motor 1000. Furthermore, the fixing part 111 is also provided with a limiting ring 1114, which is located on the side of the fixing part 111 facing the fixed bearing 250, and communicates with the first through holes 1111.

[0036] In the embodiments of this application, please refer to Figure 2 and Figure 3The fixed part 111 is provided with an abutment part 1112, which is located on the side of the fixed part 111 near the fixed bearing 250 along the direction of the rotating shaft body 140. The stator seat 230 has a first abutment surface 210 and a second abutment surface 220 perpendicular to the direction of the rotating shaft body 140. The rotating bearing 260 includes a first bearing 261 and a second bearing 262. The first bearing 261 is disposed between the first abutment surface 210 and the abutment part 1112, with the inner ring of the first bearing 261 abutting against the abutment part 1112 and the outer ring of the first bearing 261 abutting against the first abutment surface 210; the second bearing 262 is disposed between the second abutment surface 220 and the fixed bearing 250, with the inner ring of the second bearing 262 abutting against the fixed bearing 250 and the outer ring of the second bearing 262 abutting against the second abutment surface 220. Specifically, the stator assembly 200 is recessed near the shaft body 140 to form a first abutment surface 210 and abutment surface 220, so that the first bearing 261 and the second bearing 262 can be snapped and fixed. By setting the first bearing 261 and the second bearing 262, the rotation of the motor 1000 is made more stable.

[0037] It is worth mentioning that you should refer to Figure 2 and Figure 3 In conjunction with other accompanying drawings, the shaft body 140 is provided with a third protrusion 141, which protrudes radially from the fixed bearing 250. The fixing part 111 is provided with a concave part 1112, which is engaged with the third protrusion 141. That is, the fixing part 111, the inner ring of the first bearing 261 and the shaft body 140 are engaged and fixed by the contact between the outer ring of the first bearing 261 and the first abutting surface 210, the contact between the inner ring of the first bearing 261 and the abutting part 1112, and the contact between the third protrusion 141 and the concave part 1112.

[0038] In the embodiments of this application, please refer to Figure 2The stator assembly also includes a stator base 230, a stator core 240, and windings (not shown in the figures). The stator base 230 is mounted on the shaft body 140, the stator core 240 is arranged around the stator base 230, the windings are wound around the stator core 240, and a first contact surface 210 and a second contact surface 220 are provided on the stator base 230. The rotor assembly 100 also includes a magnetic sheet 120 and a rotor housing 130. The rotor housing 130 is fixed to the support portion 113, the magnetic sheet 120 is mounted on the rotor housing 130, and the windings are disposed between the magnetic sheet 120 and the stator base 230. Further, the support portion 113 is provided with a receiving groove 1131, which, together with the rotor housing 130, forms a receiving space in which the magnetic sheet 120 is received. Optionally, the rotor housing 130 is also provided with a limiting part 131, which is located on the side of the rotor housing 130 away from the support part 113, thereby preventing the magnetic sheet 120 from falling off.

[0039] In the embodiments of this application, please refer to Figure 2 and Figure 3 The motor 1000 also includes a stator cover plate 400, which covers the stator assembly 200 on the side near the fixed bearing 250, with a gap between the stator cover plate 400 and the fixed bearing 250 to prevent interference. The stator cover plate 400 has a first plate surface 410, a second plate surface 420, a second through hole 430, and a third through hole. The first plate surface 410 is planar and spaced apart from the fixed bearing 250. The second plate surface 420 is inclined around the periphery of the first plate surface 410 and corresponds to the winding. The second through hole 430 is located on the second plate surface 420 to facilitate heat dissipation of the motor 1000. The third through hole is located on the first plate surface 410. The stator assembly 200 also has a fixing groove, the opening of which corresponds to the third through hole, thereby facilitating the installation of the motor 1000 on other structures through the third through hole and the fixing groove.

[0040] In this embodiment of the application, a motor 1000 is provided. The motor 1000 includes a rotor assembly 100 and a stator assembly 200. The rotor assembly 100 includes a rotor support 110 and a shaft body 140. The rotor support 110 includes a fixing part 111, a plurality of connecting parts 112 and a support part 113. The support part 113 is arranged in a ring shape outside the fixing part 111. The plurality of connecting parts 112 are spaced apart. There is a first included angle between one connecting part 112 and another connecting part 112. One end of each connecting part 112 is connected to the fixing part 111, and the other end of each connecting part 112 is connected to the support part 113. The connecting part 112 is recessed and provided with a vibration damping groove 1121. The stator assembly 200 includes a stator base 230, a fixed bearing 250, and a rotating bearing 260. The stator base 230 is mounted on the side of the rotating bearing 260 away from the shaft body 140. The fixed bearing 250 and a fixing part 111 are disposed at both ends of the shaft body 140. The rotating bearing 260 is mounted on the shaft body 140. The fixing part 111 and the fixed bearing 250 clamp and fix the rotating bearing 260. There is a gap between the stator base 230 and the support part 113. Through the above structure, each connecting part 112 has a first included angle and is provided with a vibration damping groove 1121, thereby reducing the vibration generated by the support part 113 during the operation of the motor 1000, so that the vibration frequency of the electromagnetic excitation force is staggered with the vibration frequency of the rotor assembly 100, thereby reducing the electromagnetic coupling resonance with the structure and protecting the structure of the motor 1000.

[0041] Based on the unified inventive concept, this application also provides a drone, which includes the motor 1000 mentioned above. The structure and function of the motor 1000 can be referred to the above embodiments, and will not be repeated here.

[0042] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An electric motor, characterized in that, include: The rotor assembly includes a rotor support and a shaft body. The rotor support includes a fixing part, multiple connecting parts, and a support part. The support part is arranged in a ring shape outside the fixing part. The multiple connecting parts are spaced apart. There is a first included angle between one connecting part and another adjacent connecting part. One end of each connecting part is connected to the fixing part, and the other end of each connecting part is connected to the support part. The connecting part is recessed and has a vibration damping groove. A stator assembly includes a stator base, a fixed bearing, and a rotating bearing. The stator base is mounted on the side of the rotating bearing away from the shaft body. The fixed bearing and the fixing part are disposed at both ends of the shaft body. The rotating bearing is mounted on the shaft body. The fixing part and the fixed bearing clamp and fix the rotating bearing. There is a gap between the stator base and the support part. The connecting portion further includes a first protrusion and a second protrusion; The first protrusion is disposed between the connecting portion and the fixing portion, and the first protrusion protrudes from the fixing portion toward the bracket portion. The second protrusion is disposed between the connecting portion and the bracket portion, and the second protrusion protrudes from the bracket portion away from the stator seat along the direction of the rotating shaft body. The connecting portion is mounted on the first protrusion and the second protrusion.

2. The motor according to claim 1, characterized in that: The number of connecting parts is four, and the first included angle between one connecting part and another connecting part is 90°. Alternatively, the number of connecting parts is six, and the first included angle between one connecting part and another connecting part is 60°; Alternatively, the number of connecting parts is eight, and the first included angle between one connecting part and another is 45°; Alternatively, the number of connecting parts is ten, and the first included angle between one connecting part and another is 36°; Alternatively, the number of connecting parts is sixteen, and the first included angle between one connecting part and another is 22.5°.

3. The motor according to claim 1, characterized in that, The vibration damping groove is disposed in the middle of the connecting part, and the bottom of the vibration damping groove is arc-shaped; Alternatively, the vibration damping groove has a first inclined portion, a groove bottom, and a second inclined portion. The first inclined portion is disposed near the fixing portion, the second inclined portion is disposed near the bracket portion, and the groove bottom is disposed between the first inclined portion and the second inclined portion. The first inclined portion and the groove bottom have a second included angle, and the second inclined portion and the groove bottom have a third included angle.

4. The motor according to claim 1, characterized in that, The vibration damping groove is disposed on the side of the connecting part away from the stator base, and the vibration damping groove is disposed close to the stator base along the direction of the rotating shaft body; Alternatively, the vibration damping groove is disposed on the side of the connecting portion near the stator base, and the vibration damping groove is disposed away from the stator base along the direction in which the rotating shaft body is disposed.

5. The motor according to claim 1, characterized in that, The motor also includes a protective cover plate, which is disposed on the first protrusion and the second protrusion. There is a gap between the protective cover plate and the bracket portion, and the protective cover plate is screwed to the second protrusion.

6. The motor according to any one of claims 1-4, characterized in that, The fixing part is also provided with a plurality of first through holes, which penetrate the fixing part along the direction of the rotating shaft body, and the plurality of first through holes are arranged around the rotating shaft body.

7. The motor according to any one of claims 1-4, characterized in that, The fixing part is provided with an abutting part, which is located on the side of the fixing part close to the fixing bearing along the direction of the rotating shaft body; The stator base has a first abutting surface and a second abutting surface perpendicular to the direction of the rotating shaft body; The rotating bearing includes a first bearing and a second bearing; The first bearing is disposed between the first abutting surface and the abutting portion, the inner ring of the first bearing abuts against the abutting portion, and the outer ring of the first bearing abuts against the first abutting surface; The second bearing is disposed between the second abutment surface and the fixed bearing, with the inner ring of the second bearing abutting against the fixed bearing and the outer ring of the second bearing abutting against the second abutment surface.

8. The motor according to any one of claims 1-4, wherein the stator assembly further comprises windings; The rotor assembly also includes a magnetic sheet and a rotor housing. The rotor housing is fixed to the support portion, the magnetic sheet is mounted on the rotor housing, and the winding is disposed between the magnetic sheet and the stator base.

9. A drone, characterized in that, Includes the motor as described in any one of claims 1-8.

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