CN207652244U - A kind of DC brushless motor - Google Patents

Abstract

A kind of DC brushless motor, including holder, stator, can relative stator rotation rotor, can be powered generation magnetic field coil and control coil alive circuit control panel, the coil be wound on stator, the coil, circuit control panel and electric power generating composition circuit, the stator is fixed in holder, and the rotor passes through coil, stator that can be rotatably arranged on holder, it is characterised in that：The circuit control panel is connected with holder, connection through-hole is provided in the middle part of the stator, compartment of terrain extends inwardly support arm on the inner wall of the connection through-hole, and the end of the support arm forms the location hole that can pass through rotor, and the coil is nested with and is wrapped on support arm.It the advantage is that：Circuit control panel fixing-stable, power output are stablized, and using effect is good；DC brushless motor structure is compact, light-weight, low manufacture cost, convenient transportation, and coil is connect by conductive insert with circuit control panel not easy to break, is conducted electricity very well, and it is convenient to replace, fixing-stable.

Description

A DC brushless motor

technical field

The utility model relates to the technical field of motor production, in particular to a DC brushless motor with a compact structure.

Background technique

There is an existing Chinese invention patent application with the application number CN201610952649.2 titled "DC three-phase brushless motor for household fan", which discloses a DC three-phase brushless motor for household fan, including a winding group, a magnetic The frame, bearing and PCB board also include a magnet and a base, the magnetic frame is provided with a shaft core, the winding group is sleeved on the shaft core, and the magnetic frame is sleeved on the outer surface of the winding group, so The magnet is located between the magnetic frame and the winding group; the winding group is connected to the PCB board, the base is sleeved on the shaft core and passed through the inner hole of the winding group, one end of the base is connected to the magnetic The frame contacts, the other end of the base protrudes from the PCB board, and the bearing is sleeved on the shaft core and installed in the base. The invention can convert 220V AC voltage into 5V DC voltage, and ensure that the invention can reach the operating speed and wind pressure and air volume of the AC motor under the drive of 5V voltage, which not only saves electric energy, but also satisfies the effect of heat dissipation. However, the PCB board of the device is close to the winding group, and the magnetic field of the winding group will generate magnetic field interference on the PCB board and affect the normal operation of the PCB, and the base, base frame and elastic positioning piece may wear the shaft core, thereby affecting the service life of the motor. Therefore the structure of this device also needs further improvement.

Contents of the invention

The technical problem to be solved by the utility model is to provide a DC brushless motor with a compact structure, a small space occupation, a small influence of the coil on the circuit control board and a long service life in view of the above-mentioned prior art.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: the DC brushless motor includes a bracket, a stator, a rotor that can rotate relative to the stator, a coil that can be energized to generate a magnetic field, and a circuit control board that controls the energization of the coil. Wound on the stator, the coil, the circuit control board and the power supply form a loop, the stator is fixed in the bracket, the rotor passes through the coil, and the stator is rotatably arranged on the bracket, it is characterized in that: the circuit control board Connected with the bracket, the middle part of the stator is provided with a connection through hole, and the inner wall of the connection through hole extends inwardly at intervals to support arms, and the end of the support arm forms a positioning hole that can pass through the rotor. The coil is sheathed and wound on the support arm.

As an improvement, the stator can preferably be arranged in a limit frame, the limit frame is fixed in the bracket, the coil is wound on the limit frame corresponding to the support arm, and the limit frame is provided with a stop coil and The coil baffle that the rotor contacts.

As a further improvement, the upper part of the limit frame can preferably be provided with a conductive insert, and a socket is provided at a position corresponding to the conductive insert on the circuit control board, and the conductive insert extends into the socket of the circuit control board to be connected with The circuit control board is welded and fixed together.

As a further improvement, the upper part of the limiting frame may preferably be provided with a plugging convex part, and a slot is provided on the top of the plugging convex part, and the conductive insert can be detachably inserted in the slot, and the coil The end of the plug is connected to the conductive insert through the insertion protrusion.

As a further improvement, the limit frame includes an upper frame body and a lower frame body, the insertion protrusion is arranged on the top surface of the upper frame body, and the bottom surface of the lower frame body is provided with a winding wire that can be wound around the wire to prevent the coil from loosening. The wire column, the stator is arranged in the limit frame formed by the combination of the upper frame body and the lower frame body.

As an improvement, the rotor can preferably be fixed concentrically with the wind impeller, and the wind impeller includes an upper disc body, a lower disc body and blades arranged at intervals between the upper disc body and the lower disc body, and the middle part of the lower disc body is arranged There is a disc body through hole, the upper disc body is connected with the rotor, and the drainage channel formed between the adjacent blades communicates with the disc body through hole of the lower disc body.

As a further improvement, the outside of the side wall of the wind impeller may preferably be provided with fixed impellers, and the sides of the fixed impellers are provided with air guide vanes that guide the air to the blades at intervals, and the bottom of the bracket is provided with a connecting boss. The inner wall of the fixed impeller is buckled on the connecting boss, the bottom of the bracket is detachably provided with a motor cover, and the bottom of the motor cover is provided with a communication hole connecting the inside and outside of the motor cover, and the fixed impeller is connected to the wind turbine. The impeller is arranged in the inner cavity of the motor cover on the upper part of the communication hole.

As an improvement, the rotor can preferably be fixed on the rotating shaft by magnetic sleeve, the middle of the rotating shaft is provided with a limiting protrusion, and the upper or lower surface of the rotor touches the limiting protrusion.

As a further improvement, the bracket includes an upper bracket and a lower bracket, the upper bracket and the lower bracket are fixed by bolts, the stator is clamped between the upper bracket and the lower bracket, and the circuit control board is connected to the top of the upper bracket. On the surface, the bottom surface of the upper bracket and the top surface of the lower bracket are respectively provided with an upper concave cavity and a lower concave cavity, and the upper concave cavity and the lower concave cavity are respectively provided with an upper bearing and a lower bearing. One end is inserted into the upper bearing, and the other end of the rotating shaft passes through the lower bearing and the lower cavity to protrude from the lower bracket.

As a further improvement, a limiting groove may preferably be provided on the side wall of the stator, and the rod body of the bolt used to fix the upper bracket and the lower bracket is clamped in the limiting groove.

Compared with the prior art, the utility model has the advantages that both the circuit control board and the stator are connected with the bracket, so that the positions of the circuit control board and the stator are relatively fixed, and the DC brushless motor can keep the circuit control board and the The coils are connected, the circuit control board will not shake or be thrown out, delaying the disconnection of the connection between the coil and the circuit control board, and ensuring the normal operation of the rotor; the coil is wound on the support arm, the distance between the rotor and the rotor is short, and the magnetic induction is transmitted The effect is good, the small energy consumption realizes the rapid rotation of the rotor, and improves the efficiency of the brushless DC motor; the coil is wound on the support arm, which is not easy to loosen, and the position of the coil can be further restricted by the coil baffle, and the power output is more stable. The use effect is better; and the coil occupies less support space except the stator, so that the structure of the brushless DC motor is compact, and the brushless DC motor with a smaller volume is produced without affecting the output power of the rotor, and the structure is novel and unique. ; There is also a connection through hole of the stator that can reduce the weight of the stator, thereby reducing the weight of the brushless DC motor, saving materials, and reducing production and transportation costs; Compared with the direct connection of the wire end of the coil to the circuit control board, it has the advantages of not easy to break, good electrical conductivity, convenient replacement, stable fixing, and convenient welding; the bracket is divided into an upper bracket and a lower bracket, and the stator is set on the upper bracket. Between the bracket and the lower bracket, the circuit control board is located on the top surface of the upper bracket. The upper bracket separates the stator and the circuit control board. The coil wound on the stator is far away from the circuit control board. The magnetic field interference is weakened to ensure the normal operation of the circuit control board; the middle part of the shaft is provided with a limit protrusion, and the rotor can easily touch the limit protrusion, and the connection is stable, which is conducive to the smooth rotation of the rotor; both ends of the shaft are sleeved There are bearings, which can reduce the wear between the rotating shaft and the bracket and prolong the service life of the rotating shaft; the fixed impeller can guide the airflow to the side of the runner in one direction, which helps to form a vortex around the runner to speed up the flow of the airflow , improve the efficiency of the motor, the air guide can prevent particles from entering the runner, reduce the impact of impurities, the runner is not easy to damage, and extend the service life of the runner, the fixed impeller can be detachably set on the connecting boss for easy replacement and cleaning; the blade is fixed Between the upper disc body and the lower disc body, the upper disc body and the lower disc body can strengthen the blades, improve the strength of the runner, be more durable, slow down the damage of the blades, and prolong the service life of the blades; the upper disc body and the rotating shaft The connecting area is larger and the connection is more stable, ensuring the smooth rotation of the runner, and the use effect is better; the middle part of the lower plate is provided with a plate through hole, and the airflow entering the wind impeller from the side of the wind impeller can pass through the plate. It is discharged through the through hole, thereby forming an up and down air circulation at the lower part of the wind impeller, reducing the temperature of the motor and improving the working efficiency of the motor.

Description of drawings

Fig. 1 is the perspective view of the utility model embodiment;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a sectional view along line A-A in Fig. 2;

Fig. 4 is an exploded view of the structure of Fig. 1;

Fig. 5 is a further structural exploded view of Fig. 4;

Fig. 6 is an exploded view of the structure of the undecomposed part in Fig. 5;

Fig. 7 is an exploded view of Fig. 5 at another angle;

Fig. 8 is an exploded view of the structure of the undecomposed part in Fig. 6;

Fig. 9 is an exploded view of Fig. 6 at another angle;

Fig. 10 is a structural exploded view of the undecomposed part in Fig. 8;

Figure 11 is an exploded view of the structure of the undecomposed part in Figure 10;

Fig. 12 is an exploded view of the structure of the undecomposed part in Fig. 4;

Fig. 13 is an exploded view of Fig. 4 at another angle;

Fig. 14 is a perspective view of the cooperation between the rotor and the rotating shaft in Fig. 10;

Figure 15 is an exploded view of the structure of Figure 14;

Fig. 16 is a front projection view of the wind impeller in Fig. 10;

Fig. 17 is a sectional view along line B-B in Fig. 16;

Fig. 18 is a bottom view of the fixed impeller in Fig. 8 .

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 18, the brushless DC motor of this embodiment includes a bracket 2, a stator 3, a rotor 5 that can rotate relative to the stator 3, a coil 4 that can be energized to generate a magnetic field, and a circuit control board that controls the energization of the coil 4 1. The coil 4 is wound on the stator 3, the coil 4, the circuit control board 1 and the power supply form a loop, the stator 3 is fixed in the bracket 2, the rotor 5 passes through the coil 4, and the stator 3 can rotate Set on the support 2, the circuit control board 1 is connected with the support 2, the middle part of the stator 3 is provided with a connection through hole, and the inner wall of the connection through hole extends inwardly with support arms 31 at intervals. The end of the support arm 31 forms a positioning hole 32 capable of passing through the rotor 5 , and the coil 4 is sleeved and wound on the support arm 31 . The stator 3 is arranged in a limit frame, the limit frame is fixed in the bracket 2, the coil 4 is wound on the limit frame corresponding to the support arm 31, and the limit frame is provided with a stop coil 4 and a The coil stopper 33 that the rotor 5 contacts. The upper part of the limit frame is provided with a conductive insert 6, and a jack 11 is provided at a position corresponding to the conductive insert 6 on the circuit control board 1, and the conductive insert 6 extends into the jack 11 of the circuit control board 1 And it is fixed together with the circuit control board 1 by welding. The upper part of the limit frame is provided with a plug-in convex part 34, and the top of the plug-in convex part 34 is provided with a slot, and the conductive insert 6 is detachably inserted in the slot, and the coil 4 The end is connected to the conductive insert 6 through the insertion protrusion 34 . The spacer includes an upper frame body 35 and a lower frame body 36, the insertion protrusion 34 is arranged on the top surface of the upper frame body 35, and the bottom surface of the lower frame body 36 is provided with a wire that can be wound to prevent the coil 4 from loosening. The winding post 37 is removed, and the stator 3 is arranged in the limit frame formed by the combination of the upper frame body 35 and the lower frame body 36 .

The rotor 5 is concentrically fixed with the wind impeller 7, and the wind impeller 7 includes an upper disc body 71, a lower disc body 72 and blades 73 spaced between the upper disc body 71 and the lower disc body 72, and the lower disc body 72 A disk through hole 74 is provided in the middle, the upper disk 71 is connected to the rotor, and the drainage channel formed between adjacent blades 73 communicates with the disk through hole 74 of the lower disk 72 . The outside of the side wall of the wind impeller is provided with a fixed impeller 8, and the side of the fixed impeller 8 is provided with an air guide vane 81 that guides the air to the blade 73 at intervals, and the bottom of the support 2 is provided with a connecting boss 28, so The inner wall of the fixed impeller 8 is buckled on the connecting boss 28, the bottom of the support 2 is detachably provided with a motor cover 9, and the bottom of the motor cover 9 is provided with a communication hole communicating with the inside and outside of the motor cover, The fixed impeller 8 and the wind impeller 7 are arranged in the cavity of the motor cover 9 at the top of the communication hole. The rotor 5 is fixed on the rotating shaft 51 through magnetic sheathing, and the middle part of the rotating shaft 51 is provided with a limiting convex portion 52 , and the upper surface or the lower surface of the rotor 5 touches on the limiting convex portion 52 . The bracket 2 includes an upper bracket and a lower bracket, the upper bracket and the lower bracket are fixed by bolts, the stator 3 is clamped between the upper bracket and the lower bracket, and the circuit control board 1 is connected to the top of the upper bracket. On the surface, the bottom surface of the upper bracket and the top surface of the lower bracket are respectively provided with an upper cavity 21 and a lower cavity 22, and the upper cavity 21 and the lower cavity 22 are respectively provided with an upper bearing 23 and a lower bearing. 24. One end of the rotating shaft 51 is inserted into the upper bearing 23, and the other end of the rotating shaft 51 passes through the lower bearing 24 and the lower cavity 22 to extend out of the lower bracket. A limiting groove 38 is provided on the side wall of the stator 3 , and the rod body of the bolt for fixing the upper bracket and the lower bracket is clamped in the limiting groove 38 . The periphery of the upper bracket is provided with upper convex parts 25 at intervals, the top of the lower bracket is provided with a connecting convex ring, and the inner wall of the connecting convex ring is correspondingly provided with a lower convex part 26, and the upper surface of the spacer is The top touches the bottom surface of the upper convex part 25, the lower surface of the limiter contacts the top surface of the lower convex part 26, and the bolts used to connect the upper bracket and the lower bracket connect the upper convex part 25 and the lower convex part 26. together. The air guide vanes 81 are arranged at equal intervals on the side of the fixed impeller 8, the top view projection of the air guide vanes 81 is arc-shaped, and the inlet of the drainage channel formed between the side walls of the adjacent air guide vanes 81 is wide and wide. The exit is narrow. Protrusions 27 are provided on the top of the bracket 2 , and connection holes are provided on the body of the circuit control board 1 , and the connection holes are connected to corresponding protrusions 27 by screws. The bottom of the conductive insert 6 is provided with an inserting portion 61 , and the inserting portion 61 is inserted into a slot at the top of the inserting protrusion 34 . The raised portion 27 is a cylinder, and the center of the cylinder is provided with a cylindrical through hole that can be connected to the connection hole. There are three cylinders, and the three cylinders are respectively located at the three vertices of an equilateral triangle. corner.

Working principle: The circuit control board controls the coil to be energized, and a magnetic field is generated at the coil to drive the rotor to rotate, and the rotating shaft rotates to drive the wind impeller to rotate, so that the DC brushless motor can work normally.

Claims (10)

1. A DC brushless motor, comprising a support (2), a stator (3), a rotor (5) that can rotate relative to the stator (3), a coil (4) that can be energized to generate a magnetic field and a control coil (4) that is energized The circuit control board (1), the coil (4) is wound on the stator (3), the coil (4), the circuit control board (1) and the power supply form a loop, and the stator (3) is fixed on the bracket (2 ), the rotor (5) passes through the coil (4), and the stator (3) is rotatably arranged on the support (2), and it is characterized in that: the circuit control board (1) is connected with the support (2) , the middle part of the stator (3) is provided with a connection through hole, the inner wall of the connection through hole extends inwardly at intervals to support arms (31), and the end of the support arm (31) is formed to pass through the rotor. (5) the positioning hole (32), the coil (4) is sleeved and wound on the support arm (31). 2. The DC brushless motor according to claim 1, characterized in that: the stator (3) is arranged in a limit frame, the limit frame is fixed in the bracket (2), and the coil (4) Wound on the limit frame corresponding to the support arm (31), the limit frame is provided with a coil baffle (33) that prevents the coil (4) from contacting the rotor (5). 3. The DC brushless motor according to claim 2, characterized in that: the upper part of the limit frame is provided with a conductive insert (6), and the position corresponding to the conductive insert (6) on the circuit control board (1) A jack (11) is arranged at the place, and the conductive insert (6) extends into the jack (11) of the circuit control board (1) and is welded and fixed with the circuit control board (1). 4. The DC brushless motor according to claim 3, characterized in that: the upper part of the limit frame is provided with a plug-in protrusion (34), and the top of the plug-in protrusion (34) is provided with a slot , the conductive insert (6) can be detachably inserted in the slot, and the end of the coil (4) is connected to the conductive insert (6) through the insertion protrusion (34). 5. The DC brushless motor according to claim 4, characterized in that: the limit frame includes an upper frame (35) and a lower frame (36), and the insertion protrusion (34) is arranged on the upper frame On the top surface of (35), the bottom surface of the lower frame body (36) is provided with a winding post (37) that can wind the wire and prevent the coil (4) from getting loose, and the stator (3) is arranged on the upper frame body ( 35) in the position-limiting frame formed by matching with the lower frame body (36). 6. The DC brushless motor according to any one of claims 1 to 5, characterized in that: the rotor (5) is fixed concentrically with the wind impeller (7), and the wind impeller (7) includes an upper disc ( 71), the lower disc body (72) and the blades (73) arranged between the upper disc body (71) and the lower disc body (72) at intervals, the middle part of the lower disc body (72) is provided with a disc body through hole (74), the upper disc body (71) is connected to the rotor, and the drainage channel formed between the adjacent blades (73) communicates with the disc body through hole (74) of the lower disc body (72). 7. The DC brushless motor according to claim 6, characterized in that: a fixed impeller (8) is provided on the outside of the side wall of the wind impeller, and the side of the fixed impeller (8) is provided with intervals to guide the air to The air guide vane (81) of the blade (73), the bottom of the bracket (2) is provided with a connecting boss (28), and the inner wall of the fixed impeller (8) is buckled on the connecting boss (28). The bottom of the support (2) is detachably provided with a motor cover (9), the bottom of the motor cover (9) is provided with a communication hole communicating with the inside and outside of the motor cover, the fixed impeller (8) and the wind impeller (7) It is arranged in the inner cavity of the motor cover (9) on the upper part of the communication hole. 8. The DC brushless motor according to any one of claims 1 to 5, characterized in that: the rotor (5) is fixed on the rotating shaft (51) through magnetic sleeve, and the middle part of the rotating shaft (51) is provided with a limit The convex part (52), the upper surface or the lower surface of the rotor (5) touches on the limiting convex part (52). 9. The DC brushless motor according to claim 8, characterized in that: the bracket (2) includes an upper bracket and a lower bracket, the upper bracket and the lower bracket are fixed by bolts, and the stator (3) is clamped Placed between the upper bracket and the lower bracket, the circuit control board (1) is connected to the top surface of the upper bracket, and the bottom surface of the upper bracket and the top surface of the lower bracket are respectively provided with an upper concave cavity (21) and a The lower cavity (22), the upper cavity (21) and the lower cavity (22) are respectively provided with an upper bearing (23) and a lower bearing (24), and one end of the rotating shaft (51) is inserted into the upper bearing ( 23), the other end of the rotating shaft (51) passes through the lower bearing (24) and the lower cavity (22) to extend out of the lower bracket. 10. The DC brushless motor according to claim 8, characterized in that: the side wall of the stator (3) is provided with a limiting groove (38), which is used to fix the rods of the bolts of the upper bracket and the lower bracket. Set in the limit groove (38).