Brushless motor structure

Abstract

The utility model discloses a brushless motor structure, which solves the problem that a conventional brushless motor is not ideal in heat dissipation effect. The motor comprises a motor main body and a shell, and is characterized in that the periphery of the shell is provided with an air inlet and a sealing cover; a fan is mounted in the air inlet; a filter plate frame corresponding to the air inlet is rotationally connected in the shell; a filter plate is arranged in the filter plate frame; a circular partition plate is fixedly connected into the shell, a sliding groove is formed in one side face of the circular partition plate, a sliding ring support is connected into the sliding groove, a plurality of heat dissipation plates are installed on the side face of the sliding ring support, a plurality of connecting columns are connected to the other side face of the circular partition plate, and fixing plates are connected to the outer ends of the connecting columns. The motor body is rotationally supported on the fixing plate through the supporting assembly. The heat dissipation plate increases the heat dissipation area, the fan forcibly exchanges air heat, the heat dissipation efficiency is improved, the heat dissipation effect is ideal, and long-time stable operation of the motor can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the shell or cover with its shape, style or structure as the characteristic, especially a kind of brushless motor structure. BACKGROUND

[0002] It is known that brushless motor has many advantages such as high efficiency, long service life, low noise, etc., and is widely used in many fields such as electric vehicles, industrial automation equipment, household appliances, etc. The application of brushless motor requires low-cost products, so many technical personnel have devoted to researching low-cost brushless motor. For example, the "low-cost brushless motor structure" disclosed in the Chinese Utility Model Patent Specification CN218041014U announced on December 13, 2022 has a simple structure and low product cost. The disclosed brushless motor structure can meet the basic motor use requirements, but the heat dissipation effect is not ideal, which affects the long-term stable operation of the motor. SUMMARY

[0003] In order to solve the problem of poor heat dissipation effect of the existing brushless motor, the utility model aims to provide a brushless motor structure with good heat dissipation effect.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a brushless motor structure, which comprises a motor main body and a shell for protecting the motor main body, and the shell is provided with an air inlet and a sealing cover around the periphery. A fan is installed inside the air inlet. A filter plate holder is rotatably connected inside the shell corresponding to the air inlet, and a filter plate is arranged inside the filter plate holder. A circular partition is fixedly connected inside the shell, one side of the circular partition is provided with a sliding groove, a slip ring support is rotatably connected inside the sliding groove, a plurality of heat dissipation plates for heat dissipation are installed on the side surface of the slip ring support, and a plurality of connecting columns for support are connected to the other side surface of the circular partition. The outer end of the connecting column is fixedly connected with a fixed plate, and the motor main body is rotatably supported on the fixed plate by a supporting assembly.

[0005] Preferably, the supporting assembly comprises a support frame and a bearing, and the output shaft of the motor main body is rotatably supported on the support frame through the bearing, and the support frame is connected with the fixed plate.

[0006] Preferably, a plurality of through holes for ventilation are formed on the surface of the plurality of heat dissipation plates.

[0007] Preferably, a ventilation opening is arranged on the circular partition plate corresponding to the air inlet opening.

[0008] Preferably, an anti-skid ring for rotating the filter plate frame is arranged on the outer side of the filter plate frame.

[0009] Preferably, the outer edge of the anti-skid ring is corrugated.

[0010] Preferably, a wiring terminal is connected to the side of the shell, and a fixing column for fixing the shell is fixedly connected to the side of the shell.

[0011] Compared with the prior art, the technical effects and advantages of the utility model are: the brushless motor structure, thanks to the structure of the heat dissipation plate, part of the filtered air contacts the heat dissipation plate through the ventilation opening, the air exchanges heat with the heat absorbed on the heat dissipation plate, another part of the filtered air flows through the gap between the shell and the motor main body, the air also exchanges heat with the heating elements on the motor main body, the heat dissipation plate increases the heat dissipation area, the fan forcibly air exchanges, improves the heat dissipation efficiency, compared with the traditional brushless motor structure, the heat dissipation effect of the utility model is ideal, the structure can improve the heat dissipation of the brushless motor, and ensures long-term stable operation of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is a sectional view of the utility model;

[0015] Figure 3 It is a schematic view of the internal structure of the utility model;

[0016] Figure 4 It is Figure 3 It is an enlarged view of A in the middle.

[0017] The markings in the diagram are: 1. Motor body, 2. Housing, 3. Air inlet, 4. Sealing cover, 5. Fan, 6. Filter plate frame, 7. Filter plate, 8. Anti-slip ring, 9. Circular partition, 10. Slide groove, 11. Slip ring bracket, 12. Heat sink, 13. Ventilation port, 14. Connecting column, 15. Fixing plate, 16. Support assembly, 161. Support frame, 162. Bearing, 17. Output shaft, 18. Terminal block, 19. Fixing column, 20. Through hole. Detailed Implementation

[0018] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0019] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0020] exist Figure 1 , Figure 2 Among them, a brushless motor structure includes a motor body 1 and a housing 2, wherein the housing 2 is disposed outside the motor body and is used to protect the motor body 1.

[0021] The motor body 1 is similar to existing technologies, comprising a stator core: typically made of stacked high-permeability silicon steel sheets. The silicon steel sheets undergo insulation treatment to reduce eddy current losses, enabling the motor to more efficiently convert electrical energy into magnetic field energy during operation. Its shape is generally annular with evenly distributed slots inside for housing the stator windings. The stator windings are the key component generating the rotating magnetic field in the motor, tightly wound with enameled wire in specific winding patterns (such as distributed windings or concentrated windings) within the slots of the stator core. The number of turns, wire diameter, and other parameters of the windings are determined based on the motor's design power, speed, and torque requirements, and their ends are usually secured with straps to prevent loosening during operation. The permanent magnets are typically made of high-performance permanent magnet materials, such as neodymium iron boron (NdFeB) and ferrite. The permanent magnets are mounted on the rotor and are crucial components for generating the magnetic field; their pole distribution (e.g., two poles, four poles) and magnetic field strength directly affect the motor's performance. There are several ways to fix permanent magnets on the rotor. A common method is to embed them in grooves within the rotor core to ensure stability. The rotor core, typically made of high-strength alloy steel, provides support for the permanent magnets and, together with them, forms the rotor's magnetic field circuit. The rotor core requires precise machining to ensure good coaxiality and dynamic balance, thus reducing vibration and noise during motor operation.

[0022] existFigure 1 , Figure 2 , Figure 4 In the middle, the outer periphery of the outer casing 2 is provided with an air inlet 3 and a sealing cover 4, and a fan 5 is installed inside the air inlet 3.

[0023] like Figure 1 , Figure 3 , Figure 4 As shown, a filter plate holder 6 is rotatably connected to the inside of the outer casing 2 corresponding to the air inlet 3, and a filter plate 7 is installed inside the filter plate holder 6. The filter plate 7 filters the air entering the outer casing 2 to prevent external dust and impurities from affecting the internal components. After use, the filter plate 7 can be replaced by opening the sealing cover 4.

[0024] exist Figure 3 , Figure 4 In the middle, a circular partition 9 is welded inside the outer shell 2.

[0025] like Figure 3 , Figure 4 As shown, a sliding groove 10 is provided on one side of the circular partition 9, and a sliding ring bracket 11 is connected inside the sliding groove 10. Multiple heat dissipation plates 12 for heat dissipation are welded to the side of the sliding ring bracket 11.

[0026] exist Figure 3 In the middle, a number of connecting columns 14 for support are connected to the other side of the circular partition 9, and a fixing plate 15 is welded to the outer end of the connecting column 14.

[0027] As shown in Figure 1, the motor body 1 is rotatably supported on the fixed plate 15 by the support assembly 16.

[0028] It should be noted that, as Figure 1 As shown, the support assembly 16 includes a support frame 161 and a bearing 162. The output shaft 17 of the motor body 1 is rotatably supported on the support frame 161 via the bearing 162. The support frame 161 is welded to the fixing plate 15. Hot air inside the housing 2 is discharged between the housing 2 and the support frame 161, thereby dissipating heat from the inside of the housing 2. Common bearing types include ball bearings and needle bearings, and their precision, load-bearing capacity, and other parameters are selected according to the specific application of the motor.

[0029] It should be noted that, in order to improve the heat dissipation effect of heat sink 12, such as Figure 3 , Figure 4 As shown, each heat sink 12 has multiple through holes 20 for ventilation on its surface.

[0030] It should be noted that, in order to further improve the ventilation effect at point 12 of the heat sink, such as Figure 2 , Figure 4 As shown, a ventilation opening 13 for ventilation is provided on the circular partition 9 corresponding to the air inlet 3.

[0031] It should be noted that, in order to rotate the filter plate holder 6, as... Figure 1 , Figure 3 , Figure 4 As shown, anti-slip rings 8 are installed on the outer side of the filter plate holder 6. After a certain period of use, the filter plate 7 near the air inlet 3 will absorb a certain amount of dust and impurities. The operator can rotate the anti-slip rings 8 to rotate the filter plate holder 6, which in turn rotates the filter plate 7. This causes the part of the filter plate 7 that has absorbed a certain amount of dust and impurities to be moved away from the air inlet 3, while the unused part of the filter plate 7 is close to the air inlet 3. This allows for continuous filtration and drying of the air entering from the air inlet 3, reducing the frequency of filter plate 7 replacement.

[0032] It should be further explained that, in order to further improve the performance of the anti-slip ring 8, such as... Figure 1 , Figure 3 As shown, the anti-slip ring 8 is made of rubber anti-slip material, and its outer edge is corrugated. It should be noted that, as... Figure 1 , Figure 3 Figure 1 Figure 3 As shown, the side of the housing 2 is connected to a terminal block 18, and a fixing post 19 for fixing the housing 2 is also welded to the side of the housing 2. The housing 1 is fixed to the designated position by the fixing post 101, and the wiring is connected to an external power source through the terminal block 18 to provide power to the motor body 1 so as to achieve the function of brushless motor.

[0033] The working principle of this utility model is as follows: First, the outer casing 1 is fixed to the designated position using the fixing column 19. Power is then supplied to the motor body 1 via the wiring terminal 18 to an external power source. The fan 5 is then turned on, drawing external air into the outer casing 2 through the air inlet 3, where it contacts the filter plate 7. The filter plate 7 filters the incoming air. Part of the filtered air flows into the gap between the outer casing 2 and the motor body 1, while the other part contacts the heat sink 12 through the ventilation port 13. The air exchanges heat with the heating elements on the motor body 105 and with the heat absorbed by the heat sink 12. The resulting hot air is discharged between the outer casing 1 and the support frame 162. The fan 5 forces the air to exchange heat, resulting in high heat dissipation efficiency.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A brushless motor structure comprising a motor body and a housing for protecting the motor body, characterized by: The outer periphery of the shell is provided with an air inlet and a sealing cover; the inside of the air inlet is provided with a fan; the inside of the shell is rotatably connected with a filter plate frame corresponding to the air inlet, and the inside of the filter plate frame is provided with a filter plate; the inside of the shell is fixedly connected with a circular partition plate, one side of the circular partition plate is provided with a sliding groove, the inside of the sliding groove is connected with a sliding ring support, a plurality of heat dissipation plates for heat dissipation are mounted on the side of the sliding ring support, the other side of the circular partition plate is connected with a plurality of connecting columns for support, and the outer end of the connecting column is fixedly connected with a fixed plate; the motor body is rotatably supported on the fixed plate through a support assembly.

2. A brushless motor structure according to claim 1, characterized in that: The support assembly comprises a support frame and a bearing, and the output shaft of the motor body is rotatably supported on the support frame through the bearing, and the support frame is connected with the fixed plate.

3. A brushless motor structure according to claim 1, characterized in that: The surfaces of the plurality of heat dissipation plates are provided with a plurality of through holes for ventilation.

4. A brushless motor structure according to claim 1, characterized in that: A ventilation hole for ventilation is formed on the circular partition plate corresponding to the air inlet.

5. A brushless motor structure according to claim 1, characterized in that: An anti-skid ring for rotating the filter plate frame is mounted on the outside of the filter plate frame.

6. A brushless motor structure according to claim 5, characterized in that: Preferably, the outer edge of the anti-skid ring is corrugated.

7. A brushless motor structure according to claim 1, characterized in that: Preferably, a wiring terminal is connected to the side of the shell, and a fixing column for fixing the shell is fixedly connected to the side of the shell.

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