Brushless motor of unmanned aerial vehicle

Abstract

The utility model relates to the technical field of motors, and particularly discloses an unmanned aerial vehicle brushless motor, which comprises an inner stator iron core and an outer rotor shell, the outer rotor shell is rotatably mounted on the outer side of the inner stator iron core, a permanent magnet is fixed on the circumferential inner wall of the outer rotor shell, and a shell cover is fixedly mounted on a right port of the outer rotor shell; a bracket is fixedly mounted in the center of the left end of the inner stator iron core, a bearing cylinder seat extending rightwards is arranged on the bracket, a rotating shaft is rotationally mounted in the bearing cylinder seat through a bearing, and the rotating shaft penetrates through a shaft hole in the center of the shell cover and is fixedly connected with the shell cover; a riveting hole is formed in the inner side of the shaft hole, a riveting shaft table is arranged on the rotating shaft and connected with the riveting hole in a riveting mode, and stripe-shaped knurls are evenly distributed on the outer surface of the circumference of the riveting shaft table in the axial direction. The utility model has the advantages of fast assembly, high assembly precision and high structural reliability, and effectively improves the production efficiency and the working reliability of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a brushless motor for a drone. Background Art

[0002] In the development of UAV technology, motors are key components for driving UAV flight. The stability of their performance and the optimization of their structure directly affect the flight effect and service life of UAVs. Traditional brushless UAV motors usually use screws to fix and connect the outer rotor housing and the shaft. This fixing method is not only cumbersome and inefficient in the assembly process, but also has the risk of screws loosening or falling off during high-speed rotation, affecting the stability and safety of the motor.

[0003] In addition, traditional rotor installation methods often have problems such as low installation accuracy and easy idling of the rotor, which not only affects the flight performance of the UAV, but may also cause damage to the structure of the UAV.

[0004] Therefore, there is an urgent need for a new type of brushless motor for drones to provide an effective solution to the defects of existing technologies. Utility Model Content

[0005] The purpose of the utility model is to provide a brushless motor for a drone to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A brushless motor for an unmanned aerial vehicle comprises an inner stator core and an outer rotor shell, wherein the outer rotor shell is rotatably mounted on the outer side of the inner stator core, a permanent magnet is fixed on the circumferential inner wall of the outer rotor shell, and a shell cover is fixedly mounted on the right port of the outer rotor shell; a bracket is fixedly mounted at the center position of the left end of the inner stator core, a bearing cartridge seat extending to the right is arranged on the bracket, a rotating shaft is rotatably mounted in the bearing cartridge seat through a bearing, the rotating shaft passes through an axial hole at the center position of the shell cover and is fixedly connected to the shell cover; a riveting hole is arranged on the inner side of the axial hole, a riveting axle platform is arranged on the rotating shaft, the riveting axle platform is riveted to the riveting hole, and axially arranged striped knurling is evenly distributed on the circumferential outer surface of the riveting axle platform.

[0008] Furthermore, a protruding sunflower-shaped rotor clamp is provided at the center position of the right end surface of the shell cover, and U-shaped clamping grooves are evenly distributed on the outer edge of the sunflower-shaped rotor clamp.

[0009] Furthermore, a plurality of hollow holes are evenly distributed on the shell cover, and a protruding reinforcing rib is arranged on the right end surface of the shell cover.

[0010] Furthermore, a crimping claw is provided at the left port of the shell cover, and the crimping claw is crimped with the right port of the outer rotor housing.

[0011] Furthermore, a plurality of screw holes are distributed on the bracket, and a pair of rightwardly protruding claws are also provided on the bracket, and the claws are engaged with the side grooves of the inner stator core.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the riveting and pressing axle table is arranged on the rotating shaft and connected with the riveting holes on the shell cover by riveting, which reduces the anti-slip fixing of screws and makes the assembly quick; the riveting and pressing axle table adopts the anti-slip structure of knurling process, which can transmit torque and reduce the side screw fixing. The utility model reduces the production process links, facilitates assembly, and effectively improves production efficiency and precision.

[0014] 2. When the utility model is installing the UAV rotor, the disc sleeve on the rotor is docked with the sunflower-shaped rotor clamp, and the U-shaped claw on the rotor is clamped with the U-shaped clamping groove, which can effectively prevent the rotor from idling while achieving precise installation of the UAV wing, thereby better exerting the motor power and the lift of the UAV.

[0015] 3. In the utility model, the hollow holes are used to improve the heat dissipation capacity of the motor, and the reinforcing ribs improve the strength and rigidity of the shell cover without affecting the heat dissipation of the motor.

[0016] In the utility model, the left port of the shell cover is provided with a crimping claw which is crimped with the right port of the outer rotor shell, and the bracket is connected with the side groove of the inner stator core through the claw, so the connection is reliable and the assembly is quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structural decomposition of a brushless motor for drones;

[0018] Figure 2 This is a front view of a brushless motor for a drone;

[0019] Figure 3 This is a left view of a brushless motor for a drone;

[0020] Figure 4 This is a schematic diagram of the structure of a rotating shaft in a brushless motor of a drone;

[0021] Figure 5 This is a schematic diagram of the structure of a shell cover in a brushless motor for a drone;

[0022] Figure 6 This is a cross-sectional view of a housing cover of a brushless motor for a drone.

[0023] In the figure: 1, bracket; 2, claw; 3, bearing cartridge seat; 4, bearing; 5, inner stator core; 6, permanent magnet; 7, outer rotor housing; 8, housing cover; 9, hollow hole; 10, reinforcing rib; 11, sunflower-shaped rotor clamp; 12, U-shaped clamping groove; 13, shaft hole; 14, riveting hole; 15, crimping claw; 16, rotating shaft; 17, riveting shaft base; 18, striped knurling. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figures 1 to 6 A brushless motor for a drone comprises an inner stator core 5 and an outer rotor shell 7, wherein the outer rotor shell 7 is rotatably mounted on the outer side of the inner stator core 5, a permanent magnet 6 is fixed on the circumferential inner wall of the outer rotor shell 7, and a shell cover 8 is fixedly mounted on the right port of the outer rotor shell 7; a bracket 1 is fixedly mounted at the center position of the left end of the inner stator core 5, a bearing cartridge seat 3 extending to the right is arranged on the bracket 1, a rotating shaft 16 is rotatably mounted in the bearing cartridge seat 3 through a bearing 4, the rotating shaft 16 passes through an axial hole 13 at the center position of the shell cover 8 and is fixedly connected to the shell cover 8; a riveting hole 14 is arranged on the inner side of the axial hole 13, a riveting shaft platform 17 is arranged on the rotating shaft 16, the riveting shaft platform 17 is riveted and connected to the riveting hole 14, and striped knurling 18 arranged axially is evenly distributed on the circumferential outer surface of the riveting shaft platform 17.

[0026] Working principle of this embodiment:

[0027] The outer rotor housing 7 is fixed with permanent magnets 6, which are distributed on the circumferential inner wall of the outer rotor housing to form a stable magnetic field. When the motor is working, the electromagnetic coil on the inner stator core 5 will be energized to generate a rotating electromagnetic field. Due to the interaction between the electromagnetic field and the magnetic field generated by the permanent magnet, the outer rotor housing 7 will rotate under the action of the electromagnetic field of the inner stator core 5. During operation, the outer rotor housing 7 rotates together with the rotating shaft 16, thereby driving the rotor of the drone fixedly connected to the outer rotor housing 7 to rotate. The riveted shaft table 17 is arranged on the rotating shaft 16 and is riveted to the riveted hole 14 on the shell cover 8, which reduces the anti-slip fixation of the screws and is quick to assemble; the riveted shaft table 17 adopts a knurling process anti-slip structure, which can transmit torque while reducing the side screw fixation. This embodiment reduces the production process links, facilitates assembly, and effectively improves production efficiency and precision.

[0028] Example 2: Please refer to Figures 5-6 , a brushless motor for unmanned aerial vehicles, which differs from Example 1 in that a convex sunflower-shaped rotor card platform 11 is provided at the center position of the right end surface of the shell cover 8, and U-shaped card grooves 12 are evenly distributed on the outer edge of the sunflower-shaped rotor card platform 11.

[0029] When installing the drone rotor, the disc sleeve on the rotor docks with the sunflower-shaped rotor clamp 11, and the U-shaped claw on the rotor is clamped with the U-shaped clamping groove 12, which can effectively prevent the rotor from idling while achieving accurate installation of the drone wing. This embodiment can better fix the drone propeller, thereby better exerting the motor power and the drone lift.

[0030] Example 3: Please refer to Figures 5-6 , a brushless motor for drones, which differs from Example 1 in that a plurality of hollow holes 9 are evenly distributed on a shell cover 8, and a protruding reinforcing rib 10 is provided on the right end surface of the shell cover 8.

[0031] In this embodiment, the hollow holes 9 are used to improve the heat dissipation capacity of the motor, and the reinforcing ribs 10 improve the strength and rigidity of the shell cover 8 without affecting the heat dissipation of the motor.

[0032] Example 4: Please refer to Figures 5-6 , a brushless motor for drones, which differs from Example 1 in that a crimping claw 15 is provided at the left port of the shell cover 8, and the crimping claw 15 is crimped to the right port of the outer rotor housing 7.

[0033] In this embodiment, the left port of the shell cover 8 is provided with a crimping claw 15 which is crimped with the right port of the outer rotor housing 7, so that the connection is reliable and the assembly is quick.

[0034] Example 5: Please refer to Figures 1 to 3 , a brushless motor for drones, which differs from Example 1 in that a plurality of screw holes are distributed on a bracket 1, and a pair of rightwardly protruding claws 2 are also provided on the bracket 1, and the claws 2 are engaged with the side grooves of the inner stator core 5.

[0035] In this embodiment, the screw holes on the bracket 1 are used to pass screws to fix the bracket 1, and the bracket 1 is connected to the side grooves of the inner stator core 5 through the claws 2, so the connection is reliable and the assembly is quick.

Claims

1. A brushless motor for a drone, comprising an inner stator core (5) and an outer rotor housing (7), characterized in that: The outer rotor housing (7) is rotatably mounted on the outer side of the inner stator core (5); a permanent magnet (6) is fixed on the circumferential inner wall of the outer rotor housing (7); and a housing cover (8) is fixedly mounted on the right port of the outer rotor housing (7); a bracket (1) is fixedly mounted at the center position of the left end of the inner stator core (5); a bearing cartridge seat (3) extending to the right is provided on the bracket (1); a rotating shaft (16) is rotatably mounted in the bearing cartridge seat (3) via a bearing (4); the rotating shaft (16) passes through an axial hole (13) at the center position of the housing cover (8) and is fixedly connected to the housing cover (8); A riveting hole (14) is arranged on the inner side of the shaft hole (13), and a riveting axle platform (17) is arranged on the rotating shaft (16). The riveting axle platform (17) is riveted and connected to the riveting hole (14), and axially arranged striped knurling (18) is evenly distributed on the circumferential outer surface of the riveting axle platform (17).

2. The brushless motor for drone according to claim 1, characterized in that: An outwardly protruding sunflower-shaped rotor clamping platform (11) is arranged at the center position of the right end surface of the shell cover (8), and U-shaped clamping grooves (12) are evenly distributed on the outer edge of the sunflower-shaped rotor clamping platform (11).

3. The brushless motor for drone according to claim 1, characterized in that: A plurality of hollow holes (9) are evenly distributed on the shell cover (8), and a protruding reinforcing rib (10) is provided on the right end surface of the shell cover (8).

4. The brushless motor for drone according to claim 1, characterized in that: The left port of the housing cover (8) is provided with a crimping claw (15), and the crimping claw (15) is crimped to the right port of the outer rotor housing (7).

5. The brushless motor for drone according to claim 1, characterized in that: The bracket (1) is provided with a plurality of screw holes. The bracket (1) is also provided with a pair of rightwardly protruding claws (2), and the claws (2) are engaged with the side grooves of the inner stator core (5).

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