A brushless motor

Abstract

The present invention belongs to the technical field of mechanical equipment, and specifically is a brushless motor. By memorizing the different states of a metal spring at different temperatures, the force generated by its deformation is used to push the fan rotor inside the motor to move to different positions to achieve its different working states. By arranging a buckle at the connection between the end cover and the shell, a stable and firm connection between the end cover and the shell is achieved while facilitating installation and disassembly. By placing the magnet that generates the magnetic poles of the motor rotor in a rubber shaft, it is protected from erosion by water vapor in the air and its surface is prevented from adsorbing charged dust and particles in the air. By adding a line bracket to install and fix the complex lines inside the motor, different lines are separated and distinguished from each other.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment, in particular to a brushless motor. Background Art

[0002] An electric motor is a device that converts electrical energy into mechanical energy. Electric motors are generally divided into brushed motors and brushless motors. The principle of a brushless motor is to use the principle of electromagnetic induction to energize the coils on the stator in sequence to generate a rotating magnetic field. The magnetic field exerts a force on the magnets on the rotor, thereby driving the rotor to rotate. Brushless motors are widely used in various fields due to their high speed limit, outstanding controllability, no need for daily maintenance, and long service life.

[0003] In some areas with a huge temperature difference between day and night, the extremely high temperature during the day requires the motor to have a certain heat dissipation device, otherwise the heat will accumulate inside the motor and endanger the normal operation of some electronic components inside the motor. At night, the temperature drops to below zero. If the heat dissipation device continues to operate, the internal mechanical components will be reduced in strength due to thermal expansion and contraction, aggravated by wear and other problems, greatly reducing the service life of the motor. Most of the brushless motors on the market are currently divided into only two types: with heat dissipation devices and without heat dissipation devices, which cannot cope with this environment with a huge temperature difference between day and night.

[0004] In view of this, in order to overcome the above technical problems, the present invention designs and develops a brushless motor to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is as follows: a brushless motor provided by the present invention can work normally in an environment with a large temperature difference between day and night. When the temperature gradually rises during the day and reaches a certain critical value, the motor heat dissipation device starts to work, and when the temperature drops below the critical value at night, the motor heat dissipation device automatically stops working. The heat generated when the motor works normally can keep the motor warm on cold nights, so that the internal temperature of the motor is relatively constant when working during the day and at night, reducing the risk of damage to the internal components of the motor and increasing the service life of the motor.

[0006] The present invention provides a brushless motor, comprising a shell, wherein the upper and lower ends of the shell are provided with slide grooves, one end of the slide groove is provided with a memory metal spring; one end of the memory metal spring is fixedly connected to the end wall of the slide groove, and the other end of the memory metal spring is fixedly connected to one end of a support rod; one end of the support rod fixedly connected to the memory metal spring is stuck in the slide groove and is slidably connected to the slide groove; the other end of the support rod is fixedly connected to a hollow shaft; the end of the hollow shaft is rotatably connected to a fan rotor through a bearing; two pairs of fan blades are provided on the outer surface of the fan rotor; six permanent magnets are fixedly connected to the inner side of the fan rotor, and the six permanent magnets are all Evenly arranged on the inner side of the fan rotor; an annular fan stator is provided on the right side of the fan rotor, and six evenly arranged convex iron cores are provided on the outer side of the annular fan stator, and coils are wound on the surfaces of the six convex iron cores; a support frame is provided on the right side of the fan stator, the center of the support frame is hole-shaped and fixedly connected to the right side surface of the fan stator, and the end of the support frame is fixedly connected to the inner wall of the shell; six protrusions arranged in a ring are provided on the inner wall of the right side of the support frame, which are motor cores and correspond one by one to the positions of the convex iron cores on the outside of the fan stator, and the six motor cores are wound with coils and are connected to the coils wound on the surfaces of the convex iron cores at corresponding positions.

[0007] Preferably, the surface of the fan blade is provided with a plurality of evenly arranged square grooves, iron wires are provided inside the square grooves, and the iron wires are fixedly connected to the edges of the square grooves and are interlaced to form a mesh structure, a square waterproof bag is provided inside the mesh structure formed by the iron wires, and the edges of the waterproof bag are fixedly connected to the iron wires, and Haibo is contained in the waterproof bag.

[0008] Preferably, an end cover is provided on the right side of the shell, and six ring-shaped and evenly arranged sockets are provided on one side of the end cover with the closed edge of the shell. The socket is rotatably connected to the upper buckle through a rotating shaft, and a circular hole is provided in the middle of the buckle. A slot is provided on one side of the shell with the end cover and the closed edge of the shell. The buckle and the slot are fixedly connected by an iron ring, and one end of the iron ring is rotatably connected to the circular hole in the middle of the buckle.

[0009] Preferably, the middle part of the inner side of the end cover is rotatably connected to the rotating shaft through a coupling, a motor rotor is provided at the center of the motor stator at one end of the rotating shaft, the outer side of the motor rotor is made of rubber material, six long strip rotor magnets are provided on the outer side of the motor rotor and are evenly arranged, and the magnets are embedded inside the rubber rotor.

[0010] Preferably, the motor rotor magnet is made of rubidium magnet.

[0011] Preferably, a circuit support is provided on the right side of the motor stator.

[0012] Preferably, a long strip-shaped through hole is provided on the side of the shell.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention provides a brushless motor, which uses the different states of a memory metal spring at different temperatures to drive the fan rotor inside the motor to move to different positions using the force generated by its deformation. Since the position of the fan stator is fixed, the position of the magnetic field it generates is also fixed, so the fan rotor will rotate at the position of the fan stator magnetic field, and will stop working when it leaves this position, thereby achieving different working states of the heat dissipation device inside the motor at different temperatures.

[0015] 2. The present invention provides a brushless motor, which realizes a stable and firm connection between the end cover and the housing by arranging a snap buckle at the connection between the end cover and the housing, while facilitating installation and disassembly.

[0016] 3. The present invention provides a brushless motor, which protects the motor rotor from being corroded by water vapor in the air and prevents the surface from absorbing charged dust and particles in the air by placing the magnets that generate magnetic poles of the motor rotor inside the rubber shaft.

[0017] 4. The present invention provides a brushless motor, which can separate and distinguish different circuits from each other by adding a circuit bracket to install and fix the complex circuits inside the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is the main figure of the present invention;

[0020] Figure 2 is a side view of the internal fan position of the present invention;

[0021] Figure 3 is a side cross-sectional view of the motor rotor position of the present invention;

[0022] Figure 4 The present invention Figure 1 A partial enlarged view of the middle memory metal spring;

[0023] Figure 5 The present invention Figure 1 A partial enlarged view of the middle buckle;

[0024] Figure 6 is an external view of the housing of the present invention;

[0025] Figure 7 The present invention Figure 1 Surface view of the middle fan blade;

[0026] In the figure: housing 1, slide slot 2, memory metal spring 3, support rod 4, hollow shaft 5, fan rotor 6, fan blade 7, square slot 71, iron wire 72, waterproof bag 73, permanent magnet 8, fan stator 9, convex iron core 10, coil 11, support frame 12, motor core 13, end cover 14, holder 15, buckle 16, round hole 17, slot 18, rectangular iron ring 19, rotating shaft 20, motor stator 21, motor rotor 22, rotor magnet 23, line bracket 24, through hole 25. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] The present invention provides a brushless motor, comprising a housing 1, wherein a slide groove 2 is provided inside the upper and lower ends of the housing 1, and a memory metal spring 3 is provided at one end of the slide groove 2; one end of the memory metal spring 3 is fixedly connected to the end wall of the slide groove 2, and the other end of the memory metal spring 3 is fixedly connected to one end of a support rod 4; one end of the support rod 4 is fixedly connected to the memory metal spring 3 and is stuck in the slide groove 2 and is slidably connected to the slide groove 2; the other end of the support rod 4 is fixedly connected to a hollow shaft 5; the end of the hollow shaft 5 is rotatably connected to a fan rotor 6 through a bearing; two pairs of fan blades 7 are provided on the outer surface of the fan rotor 6; six permanent magnets 8 are fixedly connected to the inner side of the fan rotor 6, and the six permanent magnets 8 are evenly arranged on the fan The inner side of the rotor 6; an annular fan stator 9 is provided on the right side of the fan rotor 6, and six evenly arranged convex iron cores 10 are provided on the outer side of the annular fan stator 9, and the surfaces of the six convex iron cores 10 are all wound with coils 11; a support frame 12 is provided on the right side of the fan stator 9, and the center of the support frame 12 is hole-shaped and fixedly connected to the right side surface of the fan stator 9, and the end of the support frame 12 is fixedly connected to the inner wall of the shell 1; the inner wall on the right side of the support frame 12 is provided with six annularly arranged protrusions as motor cores 13 and correspond one to one with the positions of the convex iron cores 10 on the outer side of the fan stator 9, and the six motor cores 13 are all wound with coils 11 and are connected to the coils 11 wound on the surfaces of the convex iron cores 10 at the corresponding positions.

[0029] A hollow portion is provided inside the upper and lower walls of the motor housing 1 as a slide groove 2, and a memory metal spring 3 is provided at one end of the slide groove 2. One end of the memory metal spring 3 is fixed to the wall of the slide groove 2. When the daytime temperature gradually rises to more than 40°C, due to the characteristics of the memory metal, the memory metal spring 3 will maintain a curled state. Since the other end of the memory metal is fixed to the slider at the end of the support rod 4 of the fan, the center of the support rod 4 is fixedly connected to the hollow shaft 5, and the front end of the hollow shaft 5 is rotatably connected to the fan rotor 6 through the rotating shaft 20. The outer side of the fan rotor 6 is fixedly connected with the fan blade 7. When the memory metal spring 3 is in a curled state, the fan rotor 6 just wraps the fan stator 9. Because the coil 11 wound on the surface of the convex iron core 10 on the fan stator 9 is connected to the coil 11 wound on the motor stator 21 and corresponds one to one, when the motor is working normally, the motor stator 21 generates a rotating magnetic field while the fan stator 9 also generates the same rotating magnetic field, thereby driving the fan rotor 6 to rotate, causing the fan blades 7 to rotate accordingly to generate airflow to cool the inside of the motor.

[0030] When the temperature at night gradually drops below 40°C, the memory metal spring 3 returns to the elongated state. Because one end of the memory metal spring 3 is fixed to the end wall of the slide groove 2 and cannot extend, it can only push the slider at the end of the support rod 4 in the slide groove 2 to move forward, thereby pushing the support rod 4 to move to one side. Because the support rod 4 is fixedly connected to the hollow rod, and the hollow rod is rotatably connected to the fan rotor 6 through a bearing, when the support rod 4 moves to one side, the fan rotor 6 will be away from the fan stator 9 until it is out of the rotating magnetic field range of the fan stator 9, thereby stopping the fan from rotating. Since the fan stops rotating, the airflow inside the motor stops, and the heat dissipation efficiency inside the motor is reduced, so that the motor can maintain its own heat on cold nights. When the daytime temperature rises above 40°C, the memory metal spring 3 will return to the curled state, pulling the fan rotor 6 back to the rotating magnetic field range of the fan stator 9, causing the fan blades 7 to rotate again to generate airflow to cool the inside of the motor. In this way, through the characteristics of the memory metal, whether the fan rotor 6 is in the magnetic field range of the fan stator 9 is controlled according to the change in temperature, thereby automatically controlling the different working states of the heat dissipation device inside the motor at high and low temperatures.

[0031] As a specific embodiment of the present invention, a plurality of evenly arranged square grooves 71 are provided on the surface of the fan blade 7, an iron wire 72 is provided inside the square groove 71, and the iron wire 72 is fixedly connected to the edge of the square groove 71 and interlaced to form a mesh structure, a square waterproof bag 73 is provided on the inner side of the mesh structure formed by the iron wire 72, and the waterproof bag 73 is fixedly connected to the iron wire 72 and the inner wall of the square groove 71, and the waterproof bag 73 contains Haibo.

[0032] When the temperature gradually rises during the day and the internal temperature of the motor reaches 48°C, the seawater in the waterproof bag 73 begins to melt and absorbs the heat inside the motor to produce a cooling effect. The rotation of the fan blade 7 makes the hot and cold air in the electrode form convection cooling effect for a better effect. By opening a square groove 71 on the surface of the fan blade 7, a wire 72 is arranged in the square groove 71, and then a waterproof bag 73 containing seawater is arranged between the mesh structure of the wire 72 and the interlayer of the square groove 71. This structure not only balances the mass distribution to enable the fan to operate normally, but also firmly and reliably fixes the waterproof bag 73 to prevent the waterproof bag 73 from falling off when the fan is working; it not only greatly reduces the mass of the fan and reduces the burden on the motor, but also greatly increases the contact area between the waterproof bag 73 and the air, so that the heat exchange rate is faster and the cooling effect is more obvious.

[0033] When the temperature gradually drops below 48°C in the evening, the seawater in the waterproof bag 73 will gradually solidify and release heat to help the motor maintain its own temperature at night, preventing the temperature from dropping too quickly and damaging the components.

[0034] As a specific embodiment of the present invention, an end cover 14 is provided on the right side of the shell 1, and the end cover 14 and the shell 1 have a closed edge. One side of the end cover 14 is provided with six ring-shaped and evenly arranged holders 15, and the holder 15 is rotatably connected to the upper buckle 16 through a rotating shaft 20, and a circular hole 17 is provided in the middle of the buckle 16. The end cover 14 and the shell 1 have a closed edge. A slot 18 is provided on one side of the shell 1, and the buckle 16 and the slot 18 are fixedly connected by an iron ring, and one end of the iron ring is rotatably connected to the circular hole 17 in the middle of the buckle 16.

[0035] The edge of the close fitting part between the housing 1 and the end cover 14 is circular, and six buckles 16 and slots 18 are evenly arranged on the circular edge surface, wherein the buckle 16 is located on the end cover 14, and the slot 18 is located on the housing 1. The buckle 16 is provided with a rectangular iron ring 19 that can rotate around its central circular hole 17. When the motor is in normal working state, the end cover 14 and the housing 1 are fixedly matched with each other, wherein the rectangular iron ring 19 is sleeved in the slot 18 on the housing 1, and the buckle 16 on the end cover 14 is attached to the surface of the end cover 14 backward to tighten the rectangular iron ring 19 to give the end cover 14 and the housing 1 A tightly fitting tightening force. Since there are six buckles 16 and slots 18 that are evenly arranged, the end cover 14 can be closed and fixed to the shell 1 under the action of the six evenly arranged tightening forces, and it is firm and stable; when an abnormality occurs inside the motor and needs to be disassembled for maintenance, it is only necessary to lift up the ends of the six buckles 16 attached to the surface of the end cover 14 to eliminate the tightening force given to the end cover 14 and the shell 1 by the rectangular iron ring 19, and then remove the rectangular iron ring 19 from the slot 18 in turn to remove the end cover 14. This operation is quick and simple, and convenient for workers to operate.

[0036] As a specific embodiment of the present invention, the middle inner side of the end cover 14 is rotatably connected to the rotating shaft 20 through a coupling. A motor rotor 22 is provided at the center of the motor stator 21 at one end of the rotating shaft 20. The outer side of the motor rotor 22 is made of rubber material. Six long strip rotor magnets 23 are evenly arranged on the outer side of the motor rotor 22, and the magnets are embedded in the rubber rotor.

[0037] The traditional fixed exposed magnet rotor is always in contact with the air and has no protective measures. When the working time is too long, a layer of charged dust particles will be adsorbed on its surface. These charged dust particles will not only increase the friction of the rotor during operation and generate more heat, but also affect the magnetism of the rotor and are extremely difficult to clean. When the motor works in an environment with high air humidity, the water vapor in the air will also corrode the surface of the rotor to form rust and affect the operation. Therefore, embedding the rotor magnet 23 inside the rubber rotor can not only prevent the water vapor in the air from corroding the magnet, but also prevent the dust particles in the air from being adsorbed on the surface of the magnet, greatly improving the working stability of the rotor. Each magnetic pole of the rotor corresponds to only one magnet, and when the magnetic pole fails in the later stage, it can be disassembled and repaired to save costs.

[0038] As a specific implementation of the present invention, the magnet material of the motor rotor 22 is rubidium magnet.

[0039] The nepheline magnet material has a large magnetic energy storage, maintains the magnetic energy for a long time, and is easy to process into various shapes, making it very suitable as a motor rotor.

[0040] As a specific implementation of the present invention, a circuit support 24 is provided on the right side of the motor stator 21 .

[0041] When the brushless motor is working, the coils 11 on the stator need to be energized in sequence to generate a rotating magnetic field to drive the rotation of the rotor, so its internal wire circuits are complicated and easy to cross-circuit. When the wires are damaged or even a short circuit occurs and the motor is burned out, after installing the line bracket 24, the connecting lines of each coil 11 can be regularly coiled inside the line bracket 24 and then led out from the wire guide port, which greatly reduces the possibility of line failure.

[0042] As a specific implementation of the present invention, a long strip-shaped through hole 25 is provided on the side of the housing 1 .

[0043] After the long strip through hole 25 is opened on the housing 1, the air inside the motor and the outside air can be conducted to each other, so that when the heat dissipation device is working, the air inside the motor and the outside air can be exchanged, thereby improving the heat dissipation efficiency of the heat dissipation device.

[0044] Working principle: When the daytime temperature gradually rises to over 40°C, due to the characteristics of memory metal, the memory metal spring 3 will maintain a curled state. Since the other end of the memory metal is fixed to the slider at the end of the fan's support rod 4, the center of the support rod 4 is fixedly connected to the hollow shaft 5, and the front end of the hollow shaft 5 is rotatably connected to the fan rotor 6 through the rotating shaft 20. The fan rotor 6 is fixedly connected to the outside with fan blades 7. When the memory metal spring 3 is in a curled state, the fan rotor 6 just wraps the fan stator 9. Because the coil 11 wound on the surface of the convex iron core 10 on the fan stator 9 is connected to the coil 11 wound on the motor stator 21 and corresponds one to one, when the motor is working normally, the motor stator 21 generates a rotating magnetic field while the fan stator 9 also generates the same rotating magnetic field, thereby driving the fan rotor 6 to rotate, causing the fan blades 7 to rotate accordingly to generate airflow to cool the inside of the motor. When the temperature gradually drops below 40°C in the evening, the memory metal spring 3 returns to the stretched state. Because one end of the memory metal spring 3 is fixed to the end wall of the slide slot 2 and cannot extend, it can only push the slider at the end of the support rod 4 in the slide slot 2 to move forward, thereby pushing the support rod 4 to move to one side. Because the support rod 4 is fixedly connected to the hollow rod, and the hollow rod is rotatably connected to the fan rotor 6 through a bearing, when the support rod 4 moves to one side, the fan rotor 6 will move away from the fan stator 9 until it is out of the rotating magnetic field range of the fan stator 9, thereby stopping the fan from rotating. Since the fan stops rotating, the airflow inside the motor stops, and the heat dissipation efficiency inside the motor is reduced, so that the motor can maintain its own heat on cold nights. When the daytime temperature rises above 40°C, the memory metal spring 3 will return to the curled state, pulling the fan rotor 6 back to the rotating magnetic field range of the fan stator 9, causing the fan blades 7 to rotate again to generate airflow to cool down the inside of the motor, and so on.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A brushless motor, characterized in that: The invention comprises a shell (1), wherein a slide groove (2) is provided inside the upper and lower ends of the shell (1), and a memory metal spring (3) is provided at one end of the slide groove (2); one end of the memory metal spring (3) is fixedly connected to the end wall of the slide groove (2), and the other end of the memory metal spring (3) is fixedly connected to one end of a support rod (4); one end of the support rod (4) fixedly connected to the memory metal spring (3) is stuck in the slide groove (2) and is slidably connected to the slide groove (2); the other end of the support rod (4) is fixedly connected to a hollow shaft (5); the end of the hollow shaft (5) is rotatably connected to a fan rotor (6) through a bearing; two pairs of blades (7) are provided on the outer surface of the fan rotor (6); six permanent magnets (8) are fixedly connected to the inner side of the fan rotor (6), and the six permanent magnets (8) are evenly arranged on the fan rotor (6). Inside; an annular fan stator (9) is provided on the right side of the fan rotor (6), and six evenly arranged convex iron cores (10) are provided on the outside of the annular fan stator (9), and the surfaces of the six convex iron cores (10) are all wound with coils (11); a support frame (12) is provided on the right side of the fan stator (9), and the center of the support frame (12) is hole-shaped and fixedly connected to the right side surface of the fan stator (9), and the end of the support frame (12) is fixedly connected to the inner wall of the shell (1); the inner wall of the right side of the support frame (12) is provided with six annularly arranged protrusions as motor iron cores (13) and correspond one to one with the positions of the convex iron cores (10) on the outside of the fan stator (9), and the six motor iron cores (13) are all wound with coils (11) and are connected to the coils (11) wound on the surfaces of the convex iron cores (10) at corresponding positions.

2. A brushless motor according to claim 1, characterized in that: The surface of the fan blade (7) is provided with a plurality of evenly arranged square grooves (71), iron wires (72) are provided inside the square grooves (71), and the iron wires (72) are fixedly connected to the edges of the square grooves (71) and intertwined to form a mesh structure, a square waterproof bag (73) is provided inside the mesh structure formed by the iron wires (72), and the edges of the waterproof bag (73) are fixedly connected to the iron wires (72), and the waterproof bag (73) contains seawater.

3. A brushless motor according to claim 1, characterized in that: The shell (1) is provided with an end cover (14) on the right side, and the end cover (14) and the shell (1) are closed at the edge. One side of the end cover (14) is provided with six evenly arranged ring-shaped holders (15), and the holder (15) is rotatably connected to an upper buckle (16) via a rotating shaft (20), and a circular hole (17) is provided in the middle of the buckle (16). The end cover (14) and the shell (1) are closed at the edge. One side of the shell (1) is provided with a slot (18), and the buckle (16) and the slot (18) are fixedly connected via a rectangular iron ring (19), and one end of the rectangular iron ring (19) is rotatably connected to the circular hole (17) in the middle of the buckle (16).

4. A brushless motor according to claim 3, characterized in that: The middle part of the inner side of the end cover (14) is rotatably connected to the rotating shaft (20) through a coupling. A motor rotor (22) is provided at the center of the motor stator (21) at one end of the rotating shaft (20). The outer side of the motor rotor (22) is made of rubber material. Six long strip rotor magnets (23) are evenly arranged on the outer side of the motor rotor (22). The rotor magnets (23) are embedded in the rubber rotor.

5. A brushless motor according to claim 4, characterized in that: The magnet material of the motor rotor (22) is rubidium magnet.

6. A brushless motor according to claim 4, characterized in that: A circuit support (24) is provided on the right side of the motor stator (21).

7. A brushless motor according to claim 1, characterized in that: The side of the housing (1) is provided with a long strip-shaped through hole (25).

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