CN216774448U - An outer rotor motor - Google Patents

Abstract

The utility model discloses an external rotor motor, which comprises an end cover, a sleeve seat, a stator component, an external rotor component, a rotating shaft and a control circuit board, wherein the end cover comprises an end plate, the sleeve seat is arranged on the end plate, the external rotor component comprises a rotor shell and a permanent magnet, the permanent magnet is sleeved outside the stator component, the stator component and the control circuit board are respectively sleeved outside the sleeve seat, an annular positioning boss protrudes out of the end surface of the end plate facing the sleeve seat, the annular positioning boss is matched with a bearing chamber to position the sleeve seat, a first screw hole is arranged on the sleeve seat, a mounting hole is arranged on the end plate, the first screw hole corresponds to the mounting hole, the end cover and the sleeve seat are locked by threaded connection of a screw passing through the mounting hole and the first screw hole, the end cover and the sleeve seat are designed into two parts, and enough space is still left for the control circuit board and the stator component to pass through the end cover after being pressed on the bearing seat, the assembling difficulty of the motor can be reduced, and the power line can be prevented from being accumulated and extruded, so that the control circuit board can be better protected.

Description

An outer rotor motor

Technical field:

The utility model relates to an outer rotor motor.

Background technique:

With the upgrading of energy efficiency in the electrical industry, external rotor motors are widely used in exhaust equipment, air conditioning units, air purification systems and cooling equipment due to their compact structure and high material utilization.

The structure of the outer rotor motor is different from that of the traditional motor. The stator assembly of the outer rotor motor is in the middle of the motor, and the rotor assembly is on the outside, and the external lead wires of the motor are connected to the wiring board inside the motor to supply power to the winding coils of the stator assembly. The connection stability of the terminal board directly affects the stability of the motor work. In the related art, when wiring, the power cord needs to be drawn from the inside of the motor to the outside of the motor so as to be electrically connected to the external lead wires of the motor.

At present, most outer rotor motors include a mounting base, a stator assembly, an outer rotor assembly and a control circuit board. The outer rotor assembly includes a rotor casing, a number of permanent magnets and a rotating shaft. The stator assembly is sheathed in the inner cavity of the rotor casing, and the rotor casing is connected to the rotating shaft. , the installation base includes an end plate, a sleeve seat protrudes from the center of one end of the end plate, the stator assembly and the control circuit board are respectively sleeved outside the sleeve seat, and the control circuit board is located between the end insulation of the stator assembly and the end plate. There is a bearing chamber at each end of the cylinder seat, a bearing is installed in the bearing chamber, and the rotating shaft is installed in the sleeve seat through the two bearings; the end plate and the sleeve seat in the prior art are integrated, when assembling the motor, Generally, the control circuit board and the stator assembly are used together to press-fit onto the bearing seat, and the power line of the motor needs to be synchronously passed through the outlet hole of the end plate. Since the control circuit board and the stator assembly are installed, the internal The space becomes very small, which makes it more difficult to pass the power cord. This assembly method increases the difficulty of assembling the motor, and if the power cord is not passed out in time, it will cause the power cord to accumulate and squeeze, or it may If the pulling force is too high during the process of passing the power cord, it will cause damage to the control circuit board, which will easily lead to unstable operation of the motor.

Invention content:

The purpose of the utility model is to provide an outer rotor motor, which can solve the problem that in the prior art, the end plate and the sleeve seat are integrated. Passing the power cord through the outlet hole of the end plate increases the difficulty of assembling the motor, and easily causes technical problems such as accumulation and extrusion of the power cord or damage to the control circuit board, which makes the motor run unstable.

The purpose of this utility model is achieved through the following technical solutions.

The purpose of this utility model is to provide an outer rotor motor, which is characterized in that it includes an end cover, a sleeve seat, a stator assembly, an outer rotor assembly, a rotating shaft and a control circuit board, the end cover includes an end plate, and the sleeve seat is installed on the end On the board, the outer rotor assembly includes a rotor casing and a permanent magnet embedded in the rotor casing, the outer rotor assembly is sleeved outside the stator assembly, the stator assembly and the control circuit board are respectively sleeved outside the sleeve seat, and the control circuit board is located between the stator assembly and the outer casing. Between the end plates, the two ends of the sleeve seat are respectively provided with bearing chambers, bearings are installed in the bearing chambers, the rotating shaft is supported on the bearings, and an annular positioning boss protrudes on the end surface of the end plate facing the sleeve seat. The table is nested in the sleeve seat, the sleeve seat is provided with a number of first screw holes, and the end plate is provided with a number of mounting holes, the first screw holes correspond to the mounting holes, and the screws pass through the mounting holes and then connect with the first screw holes. The hole threaded connection locks the end cap and socket seat.

Preferably, one end of the sleeve seat is provided with a number of mounting feet, each mounting foot is correspondingly provided with one of the first screw holes, and a wiring boss extends from one side of one of the mounting feet. A second screw hole is opened for grounding.

Preferably, a limiting boss is protruded from the end surface of the end plate facing the sleeve seat, and the limiting boss is adapted to the shape of the end of the sleeve seat to limit the movement of the sleeve seat. Circumferential rotation.

Preferably, a plurality of heat dissipation ribs are provided on the other end surface of the end plate, and the plurality of heat dissipation ribs correspond to some of the limiting bosses.

Preferably, the annular positioning boss is arranged at the center of the end plate, and an escape hole for the end of the rotating shaft to pass through is also provided at the center of the end plate, and the outer edge of the escape hole is Set the annular positioning boss.

Preferably, the end cover further includes a sleeve portion axially protruding from the edge of the end plate, a groove is provided at the junction of the end plate and the sleeve portion, and a through hole is formed on the bottom surface of the groove , a grommet is installed in the through hole.

Preferably, the permanent magnet is an integrally formed annular body.

Preferably, a potting glue is encapsulated in the end cap to seal the control circuit board.

Preferably, a motor drive chip, a VSP speed control circuit and an FG speed feedback circuit are integrated on the control circuit board.

The motor driving chip is also packaged with a motor control IC, a driving IC and several IGBTs to form an inverter circuit, and the motor control IC controls several IGBTs through the driving IC.

Compared with the prior art, the utility model has the following effects:

1) The outer rotor motor provided by the utility model has the end cover and the sleeve seat designed into two parts, and the end cover and the sleeve seat are locked by screws. When assembling the motor, first press-fit the control circuit board and the stator assembly to the On the bearing seat, then pass the power cord out of the end cover, and then lock the end cover and the sleeve seat with screws. The structure of this scheme makes the control circuit board and stator assembly The power cord goes out of the end cover, which effectively reduces the assembly difficulty of the motor, and avoids the accumulation and extrusion of the power cord, so that the pulling force applied to the power cord can be reduced when the power cord is passed out, so that the control circuit can be better protected. In addition, an annular positioning boss protrudes from the end face of the end plate facing the sleeve seat, and the annular positioning boss is nested in the sleeve seat to locate the sleeve seat, so that the installation of the end cover and the sleeve seat becomes easier. It is simpler and faster, and can effectively ensure the coaxiality of the end cover and the sleeve seat.

2) Other advantages of the present invention are described in detail in the embodiment section.

Description of drawings:

1 is a three-dimensional schematic diagram of an outer rotor motor provided by the present invention;

2 is a schematic diagram of an exploded structure of an outer rotor motor provided by the present invention;

Fig. 3 is the top-view structure schematic diagram of the outer rotor motor provided by the present invention;

Fig. 4 is the sectional structure schematic diagram of A-A that Fig. 3 provides;

Fig. 5 is the three-dimensional structure schematic diagram of the end cap provided by the present invention;

FIG. 6 is a three-dimensional schematic diagram of another angle of the end cap provided by the present invention;

Fig. 7 is the three-dimensional structure schematic diagram of the sleeve seat provided by the present invention;

8 is a schematic diagram of the circuit structure of the motor driver chip provided by the present invention;

9 is a schematic diagram of the circuit structure of the VSP speed control circuit provided by the present utility model;

10 is a schematic diagram of the circuit structure of the FG speed feedback circuit provided by the present invention.

Detailed ways:

The present utility model will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

As shown in FIG. 1 to FIG. 6 , this embodiment provides an outer rotor motor, including an end cover 1, a sleeve seat 2, a stator assembly 3, an outer rotor assembly 4, a rotating shaft 5 and a control circuit board 6, and the end cover 1 includes an end plate 11, the sleeve seat 2 is mounted on the end plate 11, the outer rotor assembly 4 includes a rotor casing 41 and a permanent magnet 42 embedded in the rotor casing 41, and the outer rotor assembly 4 is sleeved outside the stator assembly 3, so The permanent magnet 42 is an integrally formed annular body, the stator assembly 3 and the control circuit board 6 are respectively sleeved outside the sleeve seat 2, the stator assembly 3 includes a stator iron core 31, end insulation 32 and coil windings 33, and the control circuit board 6 is located between the end insulation 32 and the end plate 11, the two ends of the sleeve seat 2 are respectively provided with bearing chambers 21, the bearing chamber 21 is installed with the bearing 7, the rotating shaft 5 is supported on the bearing 7, and the end plate 11 faces the sleeve. An annular positioning boss 111 protrudes from the end surface of the seat 2. The annular positioning boss 111 is nested in the sleeve seat 2 for positioning the sleeve seat 2. The sleeve seat 2 is provided with a number of first screw holes 22. The plate 11 is provided with a number of mounting holes 112, the first screw holes 22 correspond to the mounting holes 112, and the end cap 1 and the sleeve seat 2 are locked by screwing the screws 8 through the mounting holes 112 and then connecting with the first screw holes 22. Design the end cover 1 and the sleeve seat 2 into two parts. The end cover 1 and the sleeve seat 2 are locked by screws 8. When assembling the motor, first press the control circuit board 6 and the stator assembly 3 to the bearing 7 seat. , and then pass the power cord out of the end cover 1 and then use the screws 8 to lock the end cover 1 and the sleeve seat 2. The structure of this scheme makes the control circuit board 6 and the stator assembly 3 press-fit on the bearing 7 seat. There is enough space to pass the power cord out of the end cover 1, thereby effectively reducing the difficulty of assembling the motor, and avoiding the accumulation and extrusion of the power cord, so that the pulling force applied to the power cord can be reduced when the power cord is passed out, so that the power cord can be more easily. The control circuit board 6 is well protected; in addition, an annular positioning boss 111 protrudes from the end surface of the end plate 11 facing the sleeve seat 2, and the annular positioning boss 111 cooperates with the bearing chamber 21 to locate the sleeve seat 2, so that the end The installation of the cover 1 and the sleeve base 2 becomes simpler and faster, and the coaxiality of the end cover 1 and the sleeve base 2 can be effectively ensured.

As shown in FIG. 7 , one end of the sleeve seat 2 is provided with a plurality of mounting feet 23 , each mounting foot 23 is provided with a corresponding first screw hole 22 , and one side of one of the mounting feet 23 extends out The wiring boss 24, the wiring boss 24 is provided with a second screw hole 241 for the ground wire, the design is reasonable, and the connection of the ground wire is convenient.

As shown in FIG. 6 , a limiting boss 113 protrudes from the end surface of the end plate 11 facing the sleeve seat 2 , and the limiting boss 113 is adapted to the shape of the end of the sleeve seat 2 In order to limit the circumferential rotation of the sleeve seat 2 , the limiting boss 113 acts as a foolproof, avoids the wrong installation of the sleeve seat 2 , and can realize the rapid installation of the sleeve seat 2 .

As shown in FIG. 5 and FIG. 6 , the other end surface of the end plate 11 is provided with a plurality of heat dissipation ribs 114 , and the plurality of heat dissipation ribs 114 correspond to some of the limiting bosses 113 , which can optimize the heat dissipation function of the motor, thereby improving the The cooling efficiency of the motor.

As shown in FIG. 5 and FIG. 6 , the annular positioning boss 111 is arranged at the center of the end plate 11 , and a hole for the end of the rotating shaft 5 to pass through is also provided at the center of the end plate 11 . The hollow hole 115 is provided with an annular positioning boss 111 on the outer edge of the hollow hole 115 .

As shown in FIG. 5 , the end cover 1 further includes a sleeve portion 12 axially protruding from the edge of the end plate 11 , and a groove 13 is provided at the junction of the end plate 11 and the sleeve portion 12 . A through hole 14 is opened on the bottom surface of the groove 13, and a wire protection sleeve 9 is installed in the through hole 14, which is convenient for wiring.

The end cover 1 is potted with potting glue to seal the control circuit board 6, which effectively improves the moisture-proof and waterproof capabilities of the motor.

As shown in Figures 8 to 10, the control circuit board 6 is integrated with a motor drive chip, a VSP speed control circuit and a FG speed feedback circuit, so that the function of the motor is more complete; Figure 8 is a motor drive chip provided by the present utility model. The schematic diagram of the circuit structure of the motor driver chip is also packaged with a motor control IC, a driver IC and several IGBTs to form an inverter circuit, and the motor control IC controls several IGBTs through the driver IC. In this way, the use of the integrated motor driver chip can simplify the circuit design, save the space of the control circuit board 6, and at the same time reduce the failure rate of electronic components. The motor control IC can be a single-chip microcomputer, and the drive IC is essentially the drive chip of the inverter circuit, which is used to drive the IGBTs of each bridge arm of the inverter circuit; FIG. 9 is a schematic diagram of the circuit structure of the VSP speed control circuit provided by the present utility model; A schematic diagram of the circuit structure of the FG speed feedback circuit provided by the present invention.

The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention shall be The replacement modes that are equivalent are all included in the protection scope of the present invention.

Claims (10)

1. An outer rotor motor, comprising an end cover (1), a sleeve seat (2), a stator assembly (3), an outer rotor assembly (4), a rotating shaft (5) and a control circuit board (6), an end cover ( 1) It includes an end plate (11), the sleeve seat (2) is mounted on the end plate (11), and the outer rotor assembly (4) includes a rotor casing (41) and a permanent magnet (41) embedded in the rotor casing (41). 42), the outer rotor assembly (4) is sheathed outside the stator assembly (3), the stator assembly (3) and the control circuit board (6) are respectively sheathed outside the sleeve seat (2), and the control circuit board (6) is located in the stator assembly Between (3) and the end plate (11), the two ends of the sleeve seat (2) are respectively provided with bearing chambers (21), the bearing chambers (21) are installed with bearings (7), and the rotating shaft (5) is supported on the bearings ( 7), which is characterized in that an annular positioning boss (111) protrudes from the end face of the end plate (11) toward the sleeve seat (2), and the annular positioning boss (111) is nested in the sleeve seat (2). ), the sleeve seat (2) is provided with a number of first screw holes (22), the end plate (11) is provided with a number of mounting holes (112), and the first screw holes (22) correspond to the mounting holes (112) , the end cover (1) and the sleeve seat (2) are locked by screwing the screw (8) through the mounting hole (112) and then screwing with the first screw hole (22). 2. An outer rotor motor according to claim 1, characterized in that: one end of the sleeve seat (2) is provided with a plurality of mounting feet (23), and each mounting foot (23) is provided with a corresponding one In the first screw hole (22), a wiring boss (24) extends from one side of one of the mounting feet (23), and a second screw hole (241) is opened on the wiring boss (24) for grounding Wire. 3. An outer rotor motor according to claim 2, characterized in that: a limiting boss (113) protrudes from the end surface of the end plate (11) facing the sleeve seat (2), limiting the The position boss (113) is matched with the shape of the end of the sleeve seat (2) to limit the circumferential rotation of the sleeve seat (2). 4. An external rotor motor according to claim 3, characterized in that: the other end surface of the end plate (11) is provided with a plurality of heat dissipation ribs (114), and the plurality of heat dissipation ribs (114) The limit boss (113) corresponds. 5. An outer rotor motor according to claim 1 or 2 or 3 or 4, characterized in that: the annular positioning boss (111) is arranged at the center of the end plate (11), and is located at the center of the end plate (11). A hollow hole (115) for passing through the end of the rotating shaft (5) is further provided in the center of the end plate (11), and an annular positioning boss (111) is arranged on the outer edge of the hollow hole (115). 6 . The outer rotor motor according to claim 5 , wherein the end cover ( 1 ) further comprises a sleeve portion ( 12 ) axially protruding from the edge of the end plate ( 11 ), so that the A groove (13) is provided at the junction of the end plate (11) and the sleeve portion (12), a through hole (14) is opened on the bottom surface of the groove (13), and a protective shield is installed in the through hole (14). Wire Sleeve (9). 7 . The outer rotor motor according to claim 5 , wherein the permanent magnet ( 42 ) is an integrally formed annular body. 8 . 8 . The outer rotor motor according to claim 6 , wherein: the end cover ( 1 ) is filled with potting glue to seal the control circuit board ( 6 ). 9 . 9 . The outer rotor motor according to claim 8 , wherein the control circuit board ( 6 ) is integrated with a motor drive chip, a VSP speed control circuit and an FG speed feedback circuit. 10 . 10. An external rotor motor according to claim 9, characterized in that: the motor driver chip is further packaged with a motor control IC, a driver IC and a plurality of IGBTs to form an inverter circuit, and the motor control IC passes through the driver IC. to control several IGBTs.

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