A direct current brushless motor

Abstract

This utility model discloses a brushless DC motor, belonging to the field of motor technology. It includes a housing, inside which a brushless DC motor body is fixedly installed. An output shaft is fixedly installed at the output end of the brushless DC motor body, rotating on one side of the housing. A circuit board is disposed on the other side of the brushless DC motor body. In this utility model, a temperature sensing component is fixedly installed on the outer wall of the circuit board. A vortex tube, a conical spiral tube, a circulation pump, a storage cylinder, and a cover are disposed on the outer side of the circuit board. When the temperature sensing component detects that the circuit board temperature has reached a warning temperature, it indicates that the conventional heat conduction of the heat transfer tube assembly, vortex tube, and conical spiral tube can no longer meet the high-efficiency heat dissipation requirements of the heating plate. Therefore, the circulation pump is activated to circulate the cooling oil inside the conical spiral tube, vortex tube, and inlet pipe, thereby achieving a rapid cooling effect around the circuit board and preventing the circuit board from aging prematurely due to overheating.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a DC brushless motor. Background Technology

[0002] A brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Because brushless DC motors operate under self-control, they do not require an additional starting winding on the rotor like synchronous motors that require heavy-load starting under variable frequency speed control, nor do they experience oscillations or loss of synchronism during sudden load changes. The difference between brushless and brushed DC motors lies in their structure, which lacks brushes and a commutator. Due to the absence of brushes or commutator friction, their continuous operating lifespan can reach thousands of hours, and their noise level is also lower. With its core advantages of high efficiency, long lifespan, and low maintenance costs, brushless DC motors have become important drive devices in modern industry, widely used in automobiles, tools, industrial control, automation, and aerospace.

[0003] A search revealed a patent with publication number CN216216241U entitled "A DC Brushless Motor." The patent addresses the technical problem of single-shell bottom or side openings limiting overall motor heat dissipation. Conventional manufacturing, installation methods, and appearance designs are insufficient for high-speed DC brushless motors. By dividing the casing into upper and lower parts, and providing first, second, third, and fourth ventilation holes in each part, convection occurs within the upper and lower shells, increasing stator heat dissipation. This also simplifies the motor manufacturing process, simplifies installation, and facilitates maintenance. However, the following drawbacks remain: the lack of a dedicated heat dissipation component for the circuit board makes it prone to premature aging due to the high temperatures generated during operation, affecting its lifespan. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a brushless DC motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A brushless DC motor includes a housing, inside which a brushless DC motor body is fixedly installed. An output shaft is fixedly installed at the output end of the brushless DC motor body, and the output shaft rotates on one side of the housing. A circuit board is provided on the other side of the brushless DC motor body, and a temperature sensing component is fixedly installed on the outer wall of the circuit board. A vortex tube is fixedly attached to the outer side of the circuit board. An insertion port is provided in the middle of the other side of the housing, and a cover plate is provided on the outer side of the insertion port. A storage cylinder is fixedly installed inside the cover plate, and a circulation pump is fixedly installed in the middle of the storage cylinder. A liquid delivery pipe is fixedly connected to the input end of the circulation pump, and the input end of the liquid delivery pipe is fixedly connected to the outlet end of the vortex tube. A tapered spiral tube is fixedly connected between the output end of the circulation pump and the input end of the vortex tube.

[0007] Preferably, the brushless DC motor body is provided with a heat transfer tube assembly around its circumference.

[0008] Preferably, the other side of the housing and the cover plate are provided with multiple mounting slots.

[0009] Preferably, the storage cylinder is filled with cooling oil.

[0010] Preferably, the outer diameter of the vortex tube is greater than the length and width of the circuit board.

[0011] Preferably, both the vortex tube and the conical spiral tube are made of copper tubes, and the liquid delivery tube is a flexible plastic tube.

[0012] Preferably, both the cover plate and the storage cylinder are made of thermally conductive material, and the storage cylinder is slidably inserted into the socket.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model proposes a DC brushless motor, in which a heat transfer tube assembly is arranged around the circumference of the DC brushless motor body to dissipate the heat generated by the DC brushless motor body in a timely manner. A temperature sensing component is fixedly installed on the outer wall of the circuit board. The outer side of the circuit board is equipped with a vortex tube, a conical spiral tube, a circulation pump, a storage cylinder, and a cover plate. When the temperature sensing component detects that the circuit board temperature has reached the warning temperature, it indicates that the conventional heat conduction of the heat transfer tube assembly, vortex tube, and conical spiral tube can no longer meet the high-efficiency heat dissipation requirements of the heating plate. The circuit board is likely to experience accelerated aging due to overheating. Therefore, the circulation pump is started to circulate the cooling oil inside the conical spiral tube, vortex tube, and inlet pipe, thereby achieving a rapid cooling effect around the circuit board and preventing the circuit board from aging prematurely due to overheating.

[0015] 2. The present invention proposes a DC brushless motor in which both the vortex tube and the conical spiral tube are made of copper tubes. The outer diameter of the vortex tube is larger than the length and width of the circuit board. When cooling oil is introduced into the vortex tube, the circuit board can be cooled quickly and evenly, avoiding local overheating of the circuit board. In addition, the cover plate and the storage cylinder are made of thermally conductive materials, which can dissipate the heat of the cooled oil in time and improve the heat dissipation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a brushless DC motor proposed in this utility model;

[0017] Figure 2 This is a right-side structural schematic diagram of a brushless DC motor proposed in this utility model;

[0018] Figure 3 This is a right-side structural schematic diagram of a DC brushless motor cover plate proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the vortex tube and conical spiral tube of a DC brushless motor proposed in this utility model.

[0020] In the diagram: 1. Housing, 2. Output shaft, 3. Socket, 4. DC brushless motor body, 5. Heat transfer tube assembly, 6. Cover plate, 7. Mounting slot, 8. Circuit board, 9. Storage cylinder, 10. Circulating pump, 11. Liquid delivery pipe, 12. Vortex ring tube, 13. Conical spiral tube. Detailed Implementation

[0021] Reference Figure 1-4 A brushless DC motor includes a housing 1, a brushless DC motor body 4 fixedly installed inside the housing 1, and an output shaft 2 fixedly installed at the output end of the brushless DC motor body 4. The output shaft 2 rotates on one side of the housing 1. A circuit board 8 is provided on the other side of the brushless DC motor body 4, and a temperature sensing component is fixedly installed on the outer wall of the circuit board 8. A vortex tube 12 is fixedly attached to the outer side of the circuit board 8. An insertion port 3 is opened in the middle of the other side of the housing 1, and a cover plate 6 is provided on the outer side of the insertion port 3. A storage cylinder 9 is fixedly installed inside the cover plate 6, and a circulation pump 10 is fixedly installed in the middle of the storage cylinder 9. A liquid delivery pipe 11 is fixedly connected to the input end of the circulation pump 10, and the input end of the liquid delivery pipe 11 is fixedly connected to the outlet end of the vortex tube 12. A conical spiral tube 13 is fixedly connected between the output end of the circulation pump 10 and the input end of the vortex tube 12.

[0022] In this utility model, a heat transfer tube assembly 5 is arranged around the circumference of the DC brushless motor body 4;

[0023] Multiple mounting slots 7 are provided on the other side of the housing 1 and the cover plate 6;

[0024] Storage cylinder 9 is filled with cooling oil;

[0025] The outer diameter of the vortex tube 12 is greater than the length and width of the circuit board 8;

[0026] Both the vortex tube 12 and the conical spiral tube 13 are made of copper tubes, and the liquid delivery tube 11 is a flexible plastic tube;

[0027] Both the cover plate 6 and the storage cylinder 9 are made of thermally conductive material, and the storage cylinder 9 is slidably inserted into the socket 3.

[0028] Working principle: A heat transfer tube assembly 5 is arranged around the circumference of the DC brushless motor body 4 to dissipate the heat generated by the DC brushless motor body 4 in a timely manner. A temperature sensing component is fixedly installed on the outer wall of the circuit board 8. The outer side of the circuit board 8 is equipped with a vortex ring tube 12, a conical spiral tube 13, a circulation pump 10, a storage cylinder 9, and a cover plate 6. When the temperature sensing component detects that the temperature of the circuit board 8 reaches the warning temperature, it means that the conventional heat conduction of the heat transfer tube assembly 5, the vortex ring tube 12, and the conical spiral tube 13 can no longer meet the high-efficiency heat dissipation requirements of the heating plate 8. The circuit board 8 is prone to accelerated aging due to overheating. Therefore, the circulation pump 10 is started to make the cooling oil circulate inside the conical spiral tube 13, the vortex ring tube 12, and the liquid inlet pipe 11, thereby achieving the effect of quickly cooling the area around the circuit board 8 and preventing the circuit board 8 from aging rapidly due to overheating.

[0029] Both the vortex tube 12 and the conical spiral tube 13 are made of copper tubes. The outer diameter of the vortex tube 12 is larger than the length and width of the circuit board 8. When cooling oil is introduced into the vortex tube 12, the circuit board 8 can be cooled quickly and evenly, avoiding local overheating of the circuit board 8. In addition, the cover plate 6 and the storage cylinder 9 are both made of thermally conductive materials, which can dissipate the heat after heat exchange in a timely manner and improve the heat dissipation efficiency.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A brushless DC motor, comprising a housing (1), wherein a brushless DC motor body (4) is fixedly installed inside the housing (1), and an output shaft (2) is fixedly installed at the output end of the brushless DC motor body (4), the output shaft (2) being rotatably located on one side of the housing (1), characterized in that, A circuit board (8) is provided on the other side of the main body (4) of the DC brushless motor, and a temperature sensing component is fixedly provided on the outer wall of the circuit board (8). A vortex tube (12) is fixedly attached to the outer side of the circuit board (8). An insertion port (3) is opened in the middle of the other side of the housing (1), and a cover plate (6) is provided on the outer side of the insertion port (3). A storage cylinder (9) is fixedly installed on the inner side of the cover plate (6), and a circulation pump (10) is fixedly installed in the middle of the storage cylinder (9). A liquid delivery pipe (11) is fixedly connected to the input end of the circulation pump (10), and the input end of the liquid delivery pipe (11) is fixedly connected to the outlet end of the vortex tube (12). A conical spiral tube (13) is fixedly connected between the output end of the circulation pump (10) and the input end of the vortex tube (12).

2. A brushless DC motor according to claim 1, wherein The brushless DC motor body (4) is provided with heat transfer tubes (5) around its circumference.

3. A brushless DC motor as claimed in claim 1, wherein, Multiple mounting slots (7) are provided on the other side of the housing (1) and the cover plate (6).

4. A brushless DC motor as claimed in claim 1, wherein, The storage cylinder (9) is filled with cooling oil.

5. A brushless DC motor as claimed in claim 1, wherein, The outer diameter of the vortex tube (12) is greater than the length and width of the circuit board (8).

6. A brushless DC motor as claimed in claim 1, wherein, Both the vortex tube (12) and the conical spiral tube (13) are made of copper tubes, and the liquid delivery tube (11) is a flexible plastic tube.

7. A brushless DC motor according to claim 6, characterized in that, Both the cover plate (6) and the storage cylinder (9) are made of thermally conductive material, and the storage cylinder (9) is slidably inserted into the socket (3).

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