Outer rotation brushless motor of unmanned aerial vehicle

Abstract

The utility model provides an external rotation brushless motor of an unmanned aerial vehicle, belongs to the technical field of brushless motors, and aims to solve the problems that when a conventional brushless motor operates, when the vibration frequency of the motor is the same as the frequency of a material, the resonance phenomenon is easily generated, the normal operation of the motor is influenced, and the stability of magnetic steel in a rotor shell is poor. Comprising a rotor shell, the rotor shell is of a cylindrical structure, a connecting plate is installed at the lower position in the rotor shell, an annular fixing block is further installed on the inner end face of the rotor shell, and the fixing block is located over the connecting plate. According to the brushless motor, the gasket is connected between the protective cover plate and the rotor shell, the gasket can improve the sealing performance between the rotor shell and the protective cover plate, through holes are uniformly formed in the surface of the gasket, and the gasket is made of a rubber material, so that the phenomenon of resonance during operation of the brushless motor can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to brushless motor technical field, more specifically, especially relate to an unmanned aerial vehicle outer rotation brushless motor. BACKGROUND

[0002] Compared with brush motor, brushless motor has the characteristics of low noise, low energy consumption and high safety, and in order to ensure the concealment when the unmanned aerial vehicle is flying, the noise needs to be reduced, so the brushless motor has a wide application in the unmanned aerial vehicle.

[0003] However, the existing unmanned aerial vehicle brushless motor has the following two deficiencies in use:

[0004] Firstly, when the brushless motor is running, resonance phenomenon is easily generated when the vibration frequency of the motor is the same as the frequency of the material, which affects the normal operation of the motor;

[0005] Secondly, when the magnetic steel is clamped in the rotor shell, the stability of the magnetic steel in the rotor shell is poor due to the various flight postures of the unmanned aerial vehicle. INVENTION CONTENTS

[0006] In order to solve the above technical problems, the utility model provides an unmanned aerial vehicle outer rotation brushless motor to solve the problem that the brushless motor is running, resonance phenomenon is easily generated when the vibration frequency of the motor is the same as the frequency of the material, which affects the normal operation of the motor, and the stability of the magnetic steel in the rotor shell is poor.

[0007] The purpose and effect of the utility model are achieved by the following specific technical means: an unmanned aerial vehicle outer rotation brushless motor, comprising a rotor shell;

[0008] The rotor shell is a cylindrical structure, a connecting plate is installed at the lower position in the inside of the rotor shell, and a circular ring-shaped fixing block is also installed on the inner end face of the rotor shell, and the fixing block is located directly above the connecting plate;

[0009] The protective cover plate is located on the lower end face of the rotor shell, and a bearing is installed on the surface of the protective cover plate;

[0010] The magnetic steel is a rectangular plate structure, and the magnetic steel is distributed in the inside of the rotor shell in a ring shape;

[0011] The rotor top cover is located on the upper end face of the rotor shell, and a bearing is installed on the surface of the rotor top cover;

[0012] The motor shaft is located in the inside of the rotor shell, the upper end of the motor shaft is connected with the rotor top cover through the bearing, and the lower end of the motor shaft is connected with the protective cover plate through the bearing.

[0013] A stator coil is located outside the motor shaft, and the outer part of the stator coil is wound with enameled wire.

[0014] Further, six connecting blocks are annularly arranged on the outer end surface of the motor shaft, and the outer end surface of the connecting blocks is fixedly connected with the inner end surface of the stator coil.

[0015] Further, first connecting holes are uniformly arranged on the surface of the connecting plate, second connecting holes are uniformly arranged on the surface of the protective cover plate, threads are arranged on the surfaces of the first connecting holes and the second connecting holes, and the protective cover plate and the connecting plate are connected through bolts.

[0016] Further, a gasket is arranged between the protective cover plate and the rotor shell, and through holes are uniformly arranged on the surface of the gasket.

[0017] Further, clamping grooves are uniformly arranged on the upper end surface of the fixing block, and the lower end of the magnetic steel is clamped in the clamping groove on the surface of the fixing block.

[0018] Further, limit blocks are uniformly arranged on the lower end surface of the rotor top cover, and the limit blocks are clamped in the gap between the adjacent two magnetic steels.

[0019] Compared with the prior art, the utility model has the advantages of the following:

[0020] In the utility model, the stator coil is sleeved outside the motor shaft, the motor shaft and the stator coil are connected through the connecting block, so that a fixed whole can be formed between the stator coil and the motor shaft, the fixing block is arranged in the rotor shell, clamping grooves are uniformly arranged on the upper end surface of the fixing block, the lower end part of the magnetic steel can be clamped in the clamping groove, limit blocks are uniformly arranged on the lower end of the rotor top cover, and the limit blocks are clamped in the gap between the adjacent two magnetic steels, so that the fixing and limiting of the magnetic steel can be realized.

[0021] In addition, during the installation of the magnetic steel, the magnetic steel needs to be arranged in an alternating structure with one N outward and one S outward, the magnetic field will change under the condition that the stator coil is sequentially electrified, and according to the principle that magnetic poles repel each other and attract each other, the magnetic steel can drive the rotor shell to rotate.

[0022] In addition, the gasket is connected between the protective cover plate and the rotor shell, the gasket can improve the sealing performance between the rotor shell and the protective cover plate, and when the brushless motor is running, if the vibration frequency is the same as the vibration frequency of the material, resonance will occur, thereby affecting the normal operation of the brushless motor, the through holes are uniformly arranged on the surface of the gasket, and the gasket is made of rubber material, so that the resonance phenomenon of the brushless motor during operation can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the whole device structure schematic diagram of the utility model.

[0024] Figure 2 It is the exploded structure schematic diagram of the whole device of the utility model.

[0025] Figure 3 It is the motor shaft, connecting block and stator coil structure schematic diagram of the utility model.

[0026] Figure 4 It is the rotor shell cross section structure schematic diagram of the utility model.

[0027] Figure 5 It is the fixed block, magnetic steel and rotor top cover connecting structure schematic diagram of the utility model.

[0028] Figure 6 It is the protective cover plate and rotor shell structure schematic diagram of the utility model.

[0029] In the drawing, the corresponding relationship of component name and drawing number is as follows:

[0030] 1, rotor shell; 101, connecting plate; 1011, first connecting hole; 102, fixed block; 1021, clamping groove; 2, protective cover plate; 201, second connecting hole; 3, gasket; 301, through hole; 4, magnetic steel; 5, rotor top cover; 501, limiting block; 6, motor shaft; 601, connecting block; 7, stator coil. Specific implementation

[0031] The implementation of the utility model will be described in further detail below in combination with the drawings and examples.

[0032] Example one:

[0033] As shown in the accompanying drawings Figure 1 to the accompanying Figure 6 As shown:

[0034] The utility model provides a kind of unmanned plane outer rotation brushless motor, including rotor shell 1;

[0035] Rotor shell 1 is cylindrical structure, connecting plate 101 is installed in the inside lower position of rotor shell 1, the inner end surface of rotor shell 1 is also installed with circular fixed block 102, and fixed block 102 is located directly above connecting plate 101;

[0036] Protective cover plate 2, protective cover plate 2 is located in the lower end surface of rotor shell 1, and bearing is installed in the surface middle position of protective cover plate 2;

[0037] Magnetic steel 4, magnetic steel 4 is rectangular plate structure, and magnetic steel 4 is annularly distributed in the inside of rotor shell 1;

[0038] rotor top cover 5, the rotor top cover 5 is located in the upper end surface of the rotor shell 1, the surface of the rotor top cover 5 is installed in the middle position bearing;

[0039] motor shaft 6, the middle part of the motor shaft 6 is located inside the rotor shell 1, the upper end of the motor shaft 6 is connected with the rotor top cover 5 through the bearing, and the lower end of the motor shaft 6 is connected with the protective cover plate 2 through the bearing;

[0040] stator coil 7, the stator coil 7 is located outside the motor shaft 6, and the outside of the stator coil 7 is wound with enameled wire.

[0041] Among them, the outer end surface of the motor shaft 6 is annularly installed with six connecting blocks 601, the outer end surface of the connecting block 601 is fixedly connected with the inner end surface of the stator coil 7, and the motor shaft 6 and the stator coil 7 can be connected into a whole.

[0042] Among them, the surface of the connecting plate 101 is uniformly provided with a first connecting hole 1011, the surface of the protective cover plate 2 is uniformly provided with a second connecting hole 201, the surface of the first connecting hole 1011 and the second connecting hole 201 is provided with a thread, and the protective cover plate 2 and the connecting plate 101 are connected through bolts.

[0043] Among them, the gasket 3 is arranged between the protective cover plate 2 and the rotor shell 1, the surface of the gasket 3 is uniformly provided with a through hole 301, when the brushless motor is running, if the vibration frequency is the same as the vibration frequency of the material, resonance phenomenon will occur, thereby affecting the normal operation of the brushless motor, through the surface of the gasket 3 uniformly provided with the through hole 301, and the gasket 3 is made of rubber material, the resonance phenomenon of the brushless motor during operation can be avoided.

[0044] Among them, the upper end surface of the fixed block 102 is uniformly provided with a clamping groove 1021, the lower end of the magnetic steel 4 is clamped in the clamping groove 1021 on the surface of the fixed block 102, the magnetic steel 4 is arranged in an alternating structure of one N outward and one S outward, and the screws pass through the second connecting hole 201 and the first connecting hole 1011 in sequence, so that the protective cover plate 2 is fixedly installed on the lower end surface of the rotor shell 1, and the gasket 3 is connected between the protective cover plate 2 and the rotor shell 1, which can improve the sealing performance between the rotor shell 1 and the protective cover plate 2.

[0045] Among them, the lower end surface of the rotor top cover 5 is uniformly provided with a limiting block 501, and the limiting block 501 is clamped in the gap between the adjacent two magnetic steels 4, which can play a fixed limiting role on the magnetic steel 4.

[0046] The specific use mode and effect of the embodiment are as follows:

[0047] The utility model discloses, stator coil 7 is sleeved in the outside of motor shaft 6, and the motor shaft 6 is connected through connecting block 601 between stator coil 7, makes stator coil 7 and motor shaft 6 can form a fixed whole between, and the inside installation of rotor shell 1 has fixed block 102, and the upper end surface of fixed block 102 evenly is provided with clamping slot 1021, can be clamped in clamping slot 1021 in the lower end portion of magnetic steel 4, during the installation of magnetic steel 4, need to set up according to a piece N outward, a piece S outward's alternate structure of magnetic steel 4, and the lower end of rotor top cover 5 evenly installs limit block 501, and limit block 501 is clamped in the clearance between adjacent two magnetic steel 4, can realize the fixed limiting action of magnetic steel 4, and the magnetic field will change under the condition of stator coil 7 in turn energization, in the process of magnetic field change, according to the principle that magnetic pole same sex repels dissimilarity attracts, magnetic steel 4 will drive rotor shell 1 to rotate, and the lower position inside rotor shell 1 is installed with connecting plate 101, and the lower end surface of connecting plate 101 is attached with the lower end surface of rotor shell 1, and the surface of connecting plate 101 evenly installs first connecting hole 1011, and the screw passes second connecting hole 201 and first connecting hole 1011 in proper order, can fixedly install protective cover plate 2 in the lower end surface of rotor shell 1, and the gasket 3 is connected between protective cover plate 2 and rotor shell 1, and the gasket 3 can improve the sealing performance between rotor shell 1 and protective cover plate 2, simultaneously, if the vibration frequency of brushless motor when running is same with the vibration frequency of material, then will produce the phenomenon of resonance, thereby influence the normal operation of brushless motor, the surface of gasket 3 is evenly provided with through -hole 301, and gasket 3 adopts the setting of rubber material, can avoid the phenomenon of resonance of brushless motor when running.

Claims

1. An outer turning brushless motor for a drone, characterized by: The utility model provides a kind of motor, including rotor shell (1), the rotor shell (1) is cylindrical structure, the inside lower position of rotor shell (1) is equipped with connecting plate (101), the inner end surface of rotor shell (1) is also equipped with circular ring's fixed block (102), fixed block (102) is located the top of connecting plate (101);Protective cover plate (2), the protective cover plate (2) is located the lower end surface of rotor shell (1), the surface middle position of protective cover plate (2) is equipped with bearing;Magnetic steel (4), the magnetic steel (4) is rectangular plate structure, and magnetic steel (4) is distributed in the inside of rotor shell (1) in ring dress;Rotor top cover (5), the rotor top cover (5) is located the upper end surface of rotor shell (1), and the surface middle position of rotor top cover (5) is equipped with bearing;Motor shaft (6), the middle part of motor shaft (6) is located inside rotor shell (1), and the upper end of motor shaft (6) is connected with rotor top cover (5) by bearing, and the lower end of motor shaft (6) is connected with protective cover plate (2) by bearing;Stator coil (7), the stator coil (7) is located outside motor shaft (6), and the outside of stator coil (7) is wound with enameled wire.

2. The outer turning brushless motor of the unmanned aerial vehicle according to claim 1, wherein: The outer end surface of the motor shaft (6) is annularly mounted with six connecting blocks (601), and the outer end surface of the connecting block (601) is fixedly connected with the inner end surface of the stator coil (7).

3. The outer turning brushless motor of the unmanned aerial vehicle according to claim 1, wherein: The surface of the connecting plate (101) is uniformly provided with a first connecting hole (1011), and the surface of the protective cover plate (2) is uniformly provided with a second connecting hole (201). The first connecting hole (1011) and the second connecting hole (201) are provided with threads on the surface, and the protective cover plate (2) and the connecting plate (101) are connected by bolts.

4. The outer turning brushless motor of the drone according to claim 1, wherein: A gasket (3) is arranged between the protective cover plate (2) and the rotor shell (1), and the surface of the gasket (3) is uniformly provided with a through hole (301).

5. The outside turning brushless motor of the unmanned aerial vehicle according to claim 1, wherein: The upper end surface of the fixed block (102) is uniformly provided with a clamping groove (1021), and the lower end of the magnetic steel (4) is clamped in the clamping groove (1021) on the surface of the fixed block (102).

6. The outside turning brushless motor of the unmanned aerial vehicle according to claim 1, wherein: The lower end surface of the rotor top cover (5) is uniformly provided with a limiting block (501), and the limiting block (501) is clamped in the gap between the adjacent two magnetic steels (4).

Images