Brushless motor of unmanned aerial vehicle

Abstract

The utility model relates to the technical field of brushless motors of unmanned aerial vehicles, in particular to a brushless motor of an unmanned aerial vehicle, which comprises a rotating shaft, a top cover is arranged outside the rotating shaft, slots are symmetrically arranged on the top cover, a dustproof frame is arranged inside the slots, a dustproof net is arranged inside the dustproof frame, and mounting plates are symmetrically arranged at the top end and the bottom end of the dustproof frame. A sealing gasket is arranged on one side face of the interior of the dustproof frame, the rotating shaft is connected with a motor rotating assembly, and by means of the structure of the dustproof frame, the dustproof net, the mounting plate, the sealing gasket and the open groove, the problems that dust is prone to being accumulated in the dustproof net in the motor, but the whole motor needs to be detached tediously during replacement and maintenance are solved.

Description

Technical Field

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

[0002] The brushless DC motor consists of a stator winding and a permanent magnet rotor. It is a typical device that converts electrical energy into mechanical energy. It has the characteristics of small size, light weight, high efficiency, low noise and good reliability. It has been used in many industries and has been mass-produced. Brushless motors can be used in automobiles, medical equipment, drones, household appliances and other fields.

[0003] And in the document with the publication number CN219659490U, a brushless motor for drones is mentioned. The motor is designed with a brushless motor base with a heat dissipation duct. The three-phase winding is wound on the iron core. The combined conduction mode of the three-phase winding generates an alternating magnetic field on the stator core to drive the brushless motor rotor to rotate. The motor base is designed with a heat dissipation duct, which can guide the airflow generated when the stator rotates. The heat dissipation duct passes through the motor winding according to the designed heat dissipation duct, takes away the heat generated by the winding, and finally shoots the hot air to the outside of the motor, generating a circulating wind field with a fixed path. The motor is more likely to generate heat when it rotates at high speed. The active heat dissipation design of the motor allows the heat generated by the motor during high-speed rotation to be quickly transferred to the environment, but there are still certain defects that need to be optimized. The specific defects are as follows: The dust screen in the motor is easy to accumulate dust, but it is cumbersome to disassemble the entire motor when replacing and repairing it.

[0004] Therefore, it is particularly important to design a brushless motor for UAV to change the above technical defects and improve the overall practicality. 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 a rotating shaft, a top cover is arranged outside the rotating shaft, slots are symmetrically arranged on the top cover, a dustproof frame is arranged inside the slot, a dustproof net is arranged inside the dustproof frame, mounting plates are symmetrically arranged at the top and bottom ends of the dustproof frame, a sealing gasket is arranged on one side of the interior of the dustproof frame, and the rotating shaft is connected to a motor rotating assembly.

[0008] As a preferred solution of the utility model, the motor rotating assembly includes a brushless motor rotor, a brushless motor rotor magnet, a stator winding, a ball bearing, a shaft screw, and a motor base. The motor base and the top cover are fixedly connected by a ball bearing. A heat dissipation duct is provided on the inner side of the motor base, an air inlet is provided at the annular curvature of the outer side surface of the top cover, and an air outlet is provided at the annular curvature of the outer side surface of the motor base.

[0009] As a preferred solution of the utility model, the rotating shaft passes through the top cover and is connected to the ball bearing, the stator winding is installed on the motor base through anaerobic adhesive, the brushless motor rotor magnet is installed on the inner side of the brushless motor rotor, and a rotating shaft cover is provided at the bottom of the rotating shaft for sealing. The stator winding includes a three-phase winding and an iron core, and the three-phase winding is wound on the iron core. An alternating magnetic field is generated on the stator iron core through a combined conduction mode of the three-phase winding to drive the motor brushless motor rotor to rotate, and the stator winding is fixed on the motor base.

[0010] As a preferred solution of the utility model, a sealing rubber ring is provided on one side of the dustproof frame close to the top cover, and the transverse section area of ​​the dustproof frame is larger than the transverse section area of ​​the groove, that is, the dustproof frame can cover the groove.

[0011] As a preferred solution of the utility model, bolt holes are provided inside the two mounting plates, and the two mounting plates are fixed in position by bolts.

[0012] As a preferred solution of the utility model, an escape groove for evading the rotating shaft is provided near the center of the two dustproof frames, and the aperture of the dustproof net is 1 mm.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, a brushless motor for drone is provided, which utilizes a dustproof frame, a dustproof net, a mounting plate, a sealing gasket, and a slotted structure. A dustproof net with a 1mm aperture is built into the dustproof frame on the top cover, and is fixed to the slot through a mounting plate and bolts to achieve dustproof and sealing. When disassembling and replacing, it is only necessary to remove the bolts and pull out the dustproof frame, which solves the problem that the dustproof net in the motor is easy to accumulate dust, but the entire motor needs to be disassembled for replacement and maintenance, which is cumbersome. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the entire utility model;

[0016] Figure 2 It is a schematic diagram of the top cover of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the dustproof frame assembly of the utility model.

[0018] In the figure: 1. shaft; 2. top cover; 201. slot; 202. dustproof frame; 203. dustproof net; 204. mounting plate; 205. sealing gasket; 3. motor rotating assembly; 301. brushless motor rotor; 302. brushless motor rotor magnet; 303. stator winding; 304. ball bearing; 305. shaft screw; 306. motor base. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings below. Several embodiments of the utility model are given. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0024] A brushless motor for unmanned aerial vehicles comprises a rotating shaft 1, a top cover 2 is arranged outside the rotating shaft 1, a slot 201 is symmetrically arranged on the top cover 2, a dustproof frame 202 is arranged inside the slot 201, a dustproof net 203 is arranged inside the dustproof frame 202, mounting plates 204 are symmetrically arranged at the top and bottom ends of the dustproof frame 202, a sealing gasket 205 is arranged on one side of the inner part of the dustproof frame 202, the rotating shaft 1 is connected to a motor rotating component 3, a motor bottom support 306 and the top cover 2 are firmly connected through a ball bearing 304 to ensure that the rotating shaft 1 can rotate smoothly, a three-phase winding is energized in the stator winding 303 to generate an alternating magnetic field, and this magnetic field interacts with a brushless motor rotor magnet 302 in a brushless motor rotor 301 to push the brushless motor rotor 301 to start rotating, and as the brushless motor rotor 301 rotates, the rotating shaft 1 also rotates synchronously, and the dustproof frame 202 installed on the top cover 2 acts to To prevent dust, a dustproof net 203 is provided inside the dustproof frame 202, and its aperture is 1mm, which can effectively prevent larger dust particles from the outside from entering the inside of the motor. The dustproof frame 202 is fixed to the slot 201 of the top cover 2 by the mounting plate 204 and bolts. At the same time, the sealing gasket 205 and the sealing rubber ring ensure the sealing between the dustproof frame 202 and the top cover 2. When disassembling and replacing, it is only necessary to remove the bolts and withdraw the dustproof frame 202. During the operation of the motor, a certain amount of heat will be generated. In order to dissipate heat, a heat dissipation duct is designed on the inner side of the motor base 306, and an air inlet is opened at the annular curvature of the outer side surface of the top cover 2, and an air outlet is opened at the annular curvature of the outer side surface of the motor base 306. When the motor is working, the outside air enters the motor through the air inlet, passes through the heat dissipation duct, takes away the heat generated by the motor, and is finally discharged from the air outlet, forming an effective heat dissipation cycle.

[0025] The motor rotating assembly 3 includes a brushless motor rotor 301, a brushless motor rotor magnet 302, a stator winding 303, a ball bearing 304, a shaft screw 305, and a motor base 306. The motor base 306 and the top cover 2 are fixedly connected through the ball bearing 304. A heat dissipation duct is provided on the inner side of the motor base 306. An air inlet is provided at the annular arc of the outer side of the top cover 2, and an air outlet is provided at the annular arc of the outer side of the motor base 306. The shaft 1 passes through the top cover. 2 is connected to the ball bearing 304, the stator winding 303 is installed on the motor base 306 through anaerobic adhesive, the brushless motor rotor magnet 302 is installed on the inner side of the brushless motor rotor 301, and the bottom of the rotating shaft 1 is provided with a rotating shaft cover for sealing. The stator winding 303 includes a three-phase winding and an iron core. The three-phase winding is wound on the iron core. The alternating magnetic field is generated on the stator iron core through the combined conduction mode of the three-phase winding to drive the motor brushless motor rotor 301 to rotate. The stator winding 303 is fixed The motor base 306 is fixed on the motor base 306, and the motor base 306 and the top cover 2 are firmly connected through the ball bearing 304 to ensure that the shaft 1 can rotate smoothly. The three-phase winding is energized in the stator winding 303 to generate an alternating magnetic field. This magnetic field interacts with the brushless motor rotor magnet 302 in the brushless motor rotor 301 to push the brushless motor rotor 301 to start rotating. A sealing rubber ring is provided on the side of the dustproof frame 202 close to the top cover 2, and the transverse section area of ​​the dustproof frame 202 is larger than the transverse section area of ​​the slot 201, that is, the dustproof frame 202 can cover the slot 201, so that the slot 201 is completely sealed to prevent dust from falling in. Bolt holes are provided inside the two mounting plates 204, and the two mounting plates 204 are fixed in position by bolts to facilitate fixing the position of the dustproof frame 202. A avoidance groove for avoiding the shaft 1 is provided near the center of the two dustproof frames 202. The aperture of the dustproof net 203 is 1 mm, which is convenient for the normal rotation of the shaft.

[0026] The working process of the utility model is as follows: when using the brushless motor of the drone, first, the motor base 306 and the top cover 2 are firmly connected through the ball bearing 304 to ensure that the shaft 1 can rotate smoothly. The three-phase winding is energized in the stator winding 303 to generate an alternating magnetic field. This magnetic field interacts with the brushless motor rotor magnet 302 in the brushless motor rotor 301 to push the brushless motor rotor 301 to start rotating. As the brushless motor rotor 301 rotates, the shaft 1 also rotates synchronously, and the dustproof frame 202 installed on the top cover 2 plays a dustproof role. A dustproof net 203 is arranged inside the dustproof frame 202, and its aperture is 1mm, which can effectively prevent larger dust particles from the outside from entering the motor and prevent The dust frame 202 is fixed to the slot 201 of the top cover 2 by the mounting plate 204 and bolts. At the same time, the sealing gasket 205 and the sealing rubber ring ensure the sealing between the dust frame 202 and the top cover 2. When disassembling and replacing, it is only necessary to remove the bolts and pull out the dust frame 202. The motor will generate a certain amount of heat during operation. In order to dissipate heat, the inner side of the motor base 306 is designed with a heat dissipation duct, and the outer side of the top cover 2 is provided with an air inlet at the annular curvature, and the outer side of the motor base 306 is provided with an air outlet at the annular curvature. When the motor is working, the outside air enters the motor through the air inlet, passes through the heat dissipation duct, takes away the heat generated by the motor, and is finally discharged from the air outlet, forming an effective heat dissipation cycle.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brushless motor for a drone, comprising a rotating shaft (1), characterized in that: The rotating shaft (1) is provided with a top cover (2) on the outside, the top cover (2) is symmetrically provided with slots (201), the slot (201) is provided with a dustproof frame (202) inside, the dustproof frame (202) is provided with a dustproof net (203) inside, the top and bottom ends of the dustproof frame (202) are symmetrically provided with mounting plates (204), a sealing gasket (205) is provided on a side surface inside the dustproof frame (202), and the rotating shaft (1) is connected to a motor rotating assembly (3).

2. The brushless motor for drone according to claim 1, characterized in that: The motor rotating assembly (3) comprises a brushless motor rotor (301), a brushless motor rotor magnet (302), a stator winding (303), a ball bearing (304), a rotating shaft screw (305), and a motor base (306); the motor base (306) and the top cover (2) are fixedly connected via the ball bearing (304); a heat dissipation duct is provided on the inner side of the motor base (306); an air inlet is provided at the annular arc of the outer side surface of the top cover (2); and an air outlet is provided at the annular arc of the outer side surface of the motor base (306).

3. The brushless motor for drone according to claim 2, characterized in that: The rotating shaft (1) passes through the top cover (2) and is connected to the ball bearing (304); the stator winding (303) is mounted on the motor base (306) by means of anaerobic adhesive; the brushless motor rotor magnet (302) is mounted on the inner side of the brushless motor rotor (301); a rotating shaft cover is provided at the bottom of the rotating shaft (1) for sealing; the stator winding (303) comprises a three-phase winding and an iron core; the three-phase winding is wound on the iron core; an alternating magnetic field is generated on the stator iron core by a combined conduction mode of the three-phase winding to drive the brushless motor rotor (301) to rotate; and the stator winding (303) is fixed on the motor base (306).

4. The brushless motor for drone according to claim 1, characterized in that: A sealing rubber ring for sealing is provided on a side of the dustproof frame (202) close to the top cover (2), and the transverse section area of ​​the dustproof frame (202) is larger than the transverse section area of ​​the groove (201), that is, the dustproof frame (202) can cover the groove (201).

5. The brushless motor for drone according to claim 1, characterized in that: Bolt holes are provided inside the two mounting plates (204), and the two mounting plates (204) are fixed in position by bolts.

6. The brushless motor for drone according to claim 1, characterized in that: Near the center of the two dustproof frames (202), there is an escape groove for escaping the rotating shaft (1), and the aperture of the dustproof net (203) is 1 mm.

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