CN220934953U - DC brushless motor with built-in heat dissipation wind wheel - Google Patents

Abstract

The utility model relates to the technical field of motors, in particular to a direct-current brushless motor with a built-in heat dissipation wind wheel. It includes rotor subassembly, stator subassembly and casing. A stator component and a rotor component are arranged in the shell; the stator assembly includes a stator; the rotor assembly comprises a rotor, an output shaft and a wind wheel; the housing includes a front housing and a rear housing; the front end and the rear end of the stator are respectively and fixedly connected with the front shell and the rear shell, the output shaft is rotationally arranged on the front shell and the rear shell, the rotor and the wind wheel are respectively and fixedly connected with the output shaft, the output shaft sequentially passes through the rear shell, the wind wheel, the rotor and the front shell, and the rotor is arranged in the stator; the front shell is provided with an air inlet, the rear shell is provided with an air outlet, and the wind wheel is arranged at the rear of the rotor and stator assembly. The motor is characterized in that the motor is provided with a motor body, a wind wheel and a motor, wherein the motor body is provided with a motor body, and the motor body is provided with a motor body.

Description

DC brushless motor with built-in heat dissipation wind wheel

Technical Field

The utility model relates to the technical field of motors, in particular to a direct-current brushless motor with a built-in heat dissipation wind wheel.

Background

An electric motor is a device that converts electrical energy into mechanical energy. The motor mainly comprises a stator and a rotor, and the direction of forced movement of an electrified wire in a magnetic field is related to the current direction and the magnetic induction line direction. The motor works in the principle that the magnetic field acts on the current to rotate the motor.

The motor in the prior art, such as the comparative document CN1725609 a-permanent magnet brushless dc motor, the motor main body in the permanent magnet brushless dc motor comprises a stator assembly, a rotor assembly, a bearing a, a bearing B, an end cover, fan blades and a fan cover, one end of the motor main body is fixed with the end cover, the permanent magnet rotor assembly capable of rotating axially relative to the motor main body is arranged in the stator assembly, the motor main body comprises a permanent magnet rotor body and a central rotating shaft, the rotating shaft passes through the bearing a and is arranged on the end cover, a fan blade is fixed on a section of the rotating shaft extending out of the end cover, and the fan cover fixed with the end cover is arranged outside the fan blade. In order to dissipate heat in the motor, the fan blades are driven to rotate through the rotating shaft to dissipate heat, and the fan blades in the motor main body occupy a certain space, so that the permanent magnet brushless direct current motor is relatively large in volume. While the development of mechanical devices in which motors are installed is always moving toward a miniaturized structure, a part of larger motors cannot meet the demands of users for miniaturized mechanical devices.

Disclosure of utility model

The utility model aims to provide a direct current brushless motor with a built-in heat dissipation wind wheel, wherein the inside of the direct current brushless motor is provided with a durable wind wheel capable of dissipating heat, the assembly structure between the wind wheel and the motor is flat, and the flattening is realized while the heat dissipation effect is ensured. The motor solves the technical problems that the motor with the heat dissipation wind wheel is overlarge in size, does not accord with the development trend of mechanical equipment towards miniaturization, is difficult to meet the requirement of a user on pursuing miniaturization of the mechanical equipment, and cannot keep miniaturization of the motor while heat dissipation is achieved.

To achieve the purpose, the utility model adopts the following technical scheme:

A DC brushless motor with built-in heat dissipation wind wheel comprises a rotor assembly, a stator assembly and a shell. The stator assembly and the rotor assembly are arranged in the shell; the stator assembly includes a stator; the rotor assembly comprises a rotor, an output shaft and a wind wheel; the housing includes a front housing and a rear housing; the front end and the rear end of the stator are respectively and fixedly connected with the front shell and the rear shell, the output shaft is rotationally arranged in the front shell and the rear shell, the rotor and the wind wheel are respectively and fixedly connected with the output shaft, the output shaft sequentially passes through the rear shell, the wind wheel, the rotor and the front shell, and the rotor is arranged in the stator; the front shell is provided with an air inlet, the rear shell is provided with an air outlet, and the wind wheel is arranged behind the rotor and the stator assembly; the wind wheel comprises a wind wheel body and blades, the wind wheel body is uniformly provided with a plurality of blades along the circumferential direction, the blades are arranged on one surface of the wind wheel body facing the rotor and the stator, the blades face the front shell, and the air outlet is arranged on the side wall of the rear shell, corresponding to the blades.

Preferably, the blade is arc-shaped.

Preferably, the front shell is provided with a plurality of air inlets, the air inlets are arranged on the side wall of the front shell, and the rear shell is provided with an air outlet.

Preferably, the stator assembly further comprises an electric wire, and the stator comprises a first wire frame, a second wire frame, a wire buckle, a stator core and a stator coil; the front end of the stator core is abutted with the first wire frame, the rear end of the stator core is abutted with the second wire frame, the first wire frame and the second wire frame are buckled with each other, the first wire frame and the second wire frame are buckled with the front end and the rear end of the stator core respectively, and the stator coil is wound on the first wire frame and the second wire frame; the electric wire is connected with the stator coil, and the wire buckle buckles the electric wire between the first wire frame and the wire buckle.

Preferably, the rotor assembly comprises a first bearing, a second bearing, the rotor, the output shaft and the wind wheel; the rotor comprises magnetic steel, a rotor core, a first cover plate and a second cover plate, wherein the magnetic steel is arranged in the rotor core; the output shaft sequentially passes through the second bearing, the wind wheel, the second cover plate, the rotor iron core, the first cover plate and the first bearing; the inner ring of the first bearing is fixedly connected with the output shaft, the outer ring of the first bearing is fixedly connected with the front shell, the inner ring of the second bearing is connected with the output shaft, and the outer ring of the second bearing is fixedly connected with the rear shell.

Preferably, the rotor assembly further comprises a first snap ring and a second snap ring; the output shaft is provided with a first clamping ring groove and a second clamping ring groove; the first snap ring is buckled in the first snap ring groove, the second snap ring is buckled in the second snap ring groove, the first snap ring is abutted against the front end face of the first cover plate, the second snap ring is abutted against the rear end face of the wind wheel, and the first snap ring and the second snap ring fix the first cover plate, the rotor core, the second cover plate and the wind wheel on the output shaft.

Preferably, the rotor is provided with a rivet, and the second cover plate, the magnetic steel and the first cover plate are fixed by the rivet.

Preferably, bearing chambers are respectively arranged on the front shell and the rear shell, the first bearing is arranged in the bearing chamber of the front shell, and the second bearing is arranged in the bearing chamber of the rear shell; the direct current brushless motor with the built-in heat dissipation wind wheel further comprises a gasket, wherein the gasket is arranged in the bearing chamber, the front of the gasket is abutted against the second bearing, and the rear of the gasket is abutted against the bearing chamber.

Preferably, an end of the output shaft remote from the wind wheel extends out of the front housing.

Preferably, at least one fixing hole is formed in the front shell, a shockproof foot pad is arranged on the fixing hole, and a fixing through cavity is formed in the shockproof foot pad.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

The rotor assembly is arranged in the stator assembly, and a wind wheel with a heat dissipation function is arranged on the rotor assembly, namely the integral structure of the direct current brushless motor with the built-in heat dissipation wind wheel is flat. The wind wheel consists of a plurality of blades uniformly arranged on the wind wheel body in the circumferential direction. Namely, the structure of the wind wheel is flat, so that the whole structure of the direct current brushless motor with the built-in heat dissipation wind wheel is flat. And the shell is provided with an air inlet and an air outlet, the wind wheel rotates, hot air in the direct-current brushless motor with the built-in heat dissipation wind wheel is discharged through the air outlet, and meanwhile, normal-temperature air is sucked into the direct-current brushless motor with the built-in heat dissipation wind wheel through the air inlet, so that the effect of circulating heat dissipation is realized. The structure can realize the flattening of the direct current brushless motor with the built-in heat dissipation wind wheel while guaranteeing the heat dissipation effect.

Drawings

Fig. 1 is an exploded schematic view of a dc brushless motor with a built-in heat dissipating wind wheel according to an embodiment of the present utility model.

Fig. 2 is a wind wheel structure diagram of a direct current brushless motor with a built-in heat dissipation wind wheel according to an embodiment of the present utility model.

Fig. 3 is an exploded schematic view of a stator assembly in a dc brushless motor with a built-in heat dissipating wind rotor according to an embodiment of the present utility model.

Fig. 4 is an exploded schematic view of a rotor assembly in a dc brushless motor with a built-in heat dissipating wind wheel according to an embodiment of the present utility model.

Fig. 5 is a schematic structural view of a dc brushless motor with a built-in heat dissipation rotor according to an embodiment of the present utility model.

Fig. 6 is an exploded view of a dc brushless motor with a built-in heat dissipating wind wheel according to an embodiment of the present utility model.

Fig. 7 is a schematic structural view of an output shaft of a dc brushless motor with a built-in heat dissipation rotor according to an embodiment of the present utility model.

Wherein: rotor assembly 1, rotor 11, magnetic steel 111, rotor core 112, first cover plate 113, second cover plate 114, output shaft 12, first snap ring groove 121, second snap ring groove 122, wind wheel 13, wind wheel body 131, blades 132, first bearing 14, second bearing 15, first snap ring 16, second snap ring 17, stator assembly 2, electric wire 21, stator 22, first bobbin 221, second bobbin 222, bobbin 223, stator core 224, stator coil 225, housing 3, rear housing 31, air outlet 311, bearing chamber 312, front housing 32, air inlet 321, fixing hole 322, shock absorbing foot pad 3221, fixing through cavity 32211, gasket 4.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

As shown in fig. 1 to 7, a direct current brushless motor with a built-in heat dissipation wind wheel comprises a rotor assembly 1, a stator assembly 2 and a shell 3; the stator assembly 2 and the rotor assembly 1 are arranged in the shell 3; the stator assembly 2 comprises a stator 22; the rotor assembly 1 comprises a rotor 11, an output shaft 12 and a wind wheel 13; the housing 3 includes a front housing 32 and a rear housing 31; the front end and the rear end of the stator 22 are respectively and fixedly connected with the front shell 32 and the rear shell 31, the output shaft 12 is rotatably arranged in the front shell 32 and the rear shell 31, the rotor 11 and the wind wheel 13 are respectively and fixedly connected with the output shaft 12, the output shaft 12 sequentially passes through the rear shell 31, the wind wheel 13, the rotor 11 and the front shell 32, and the rotor 11 is arranged in the stator 22; the front shell 32 is provided with an air inlet 321, the rear shell 31 is provided with an air outlet 311, and the wind wheel 13 is arranged behind the rotor 11 and the stator assembly 2; the wind wheel 13 comprises a wind wheel body 131 and blades 132, the wind wheel body 131 is uniformly provided with a plurality of blades 132 along the circumferential direction, the blades 132 are arranged on one surface of the wind wheel body 131, which faces the rotor 11 and the stator 22, the blades 132 are arranged towards the front shell 32, and the air outlet 311 is arranged on the side wall of the rear shell 31, which corresponds to the blades 132.

The motor in the prior art, such as the comparative document CN1725609 a-permanent magnet brushless dc motor, the motor main body in the permanent magnet brushless dc motor comprises a stator assembly, a rotor assembly, a bearing a, a bearing B, an end cover, fan blades and a fan cover, one end of the motor main body is fixed with the end cover, the permanent magnet rotor assembly capable of rotating axially relative to the motor main body is arranged in the stator assembly, the motor main body comprises a permanent magnet rotor body and a central rotating shaft, the rotating shaft passes through the bearing a and is arranged on the end cover, a fan blade is fixed on a section of the rotating shaft extending out of the end cover, and the fan cover fixed with the end cover is arranged outside the fan blade. In order to dissipate heat of the motor, the fan blades are driven to rotate through the rotating shaft to dissipate heat, and the fan blades in the motor main body occupy a certain space, so that the permanent magnet brushless direct current motor is relatively large in size. While the development of mechanical devices in which motors are installed is always moving toward a miniaturized structure, a part of larger motors cannot meet the demands of users for miniaturized mechanical devices.

In order to solve the technical problems that the motor with the heat dissipation wind wheel is overlarge in size, does not meet the development trend of mechanical equipment towards miniaturization, is difficult to meet the requirement of a user for pursuing miniaturization of the mechanical equipment, and cannot keep miniaturization of the motor while heat dissipation is achieved. The scheme provides a direct current brushless motor with a built-in heat dissipation wind wheel, which comprises a rotor assembly 1, a stator assembly 2 and a shell 3. A stator assembly 2 and a rotor assembly 1 are arranged in the shell 3. The stator assembly 2 includes a stator 22; the rotor assembly 1 comprises a rotor 11, an output shaft 12 and a rotor wheel 13. The wind wheel 13 can drive the gas inside the direct current brushless motor with the built-in heat dissipation wind wheel to send the hot air flow out of the direct current brushless motor with the built-in heat dissipation wind wheel.

The housing 3 includes a front housing 32 and a rear housing 31. The front and rear ends of the stator 22 are fixedly connected with the front shell 32 and the rear shell 31 respectively, the output shaft 12 is rotatably arranged in the front shell 32 and the rear shell 31, the rotor 11 and the wind wheel 13 are fixedly connected with the output shaft 12 respectively, the output shaft 12 sequentially passes through the rear shell 31, the wind wheel 13, the rotor 11 and the front shell 32, and the rotor 11 is arranged in the stator 22. The front housing 32 is provided with an air inlet 321, and the rear housing 31 is provided with an air outlet 311. A wind wheel 13 is arranged behind the rotor 11 and the stator assembly 2. When energized, the motor generates a rotating magnetic field by the stator assembly 2 and applies a magnetomotive rotational torque to the rotor assembly 1, thereby rotating the rotor 11. And the rotor wheel 13 on the rotor 11 will also rotate therewith. The wind wheel 13 rotates, heat in the direct current brushless motor with the built-in heat dissipation wind wheel is taken out through the air outlet 311, and then external wind is supplemented into the direct current brushless motor with the built-in heat dissipation wind wheel, so that the effect of circulating heat dissipation is achieved.

The wind wheel 13 includes a wind wheel body 131 and blades 132, and the wind wheel body 131 is uniformly provided with a plurality of blades 132 along the circumferential direction. The blades 132 are disposed on the wind wheel body 131, and the wind wheel body 131 supports the blades 132 mechanically to increase stability of the blades. The problem that the blades 132 are easy to age due to heat generated by a direct current brushless motor with a built-in heat dissipation wind wheel is avoided, and moreover, the blades 132 are broken due to resistance of high-speed running wind of the motor. I.e. the design is advantageous for improving the service life of the wind wheel 13.

The blades 132 are disposed on one surface of the wind turbine body 131 facing the rotor 11 and the stator 22, the blades 132 are disposed towards the front housing 32, and the air outlet 311 is disposed on the side wall of the rear housing 31 corresponding to the blades 132.

When the motor is electrified, the rotor 11 rotates to drive the wind wheel 13, wherein the wind wheel 13 sends out hot air through the air outlet 311 corresponding to the wind wheel, meanwhile, normal-temperature air is supplemented through the air inlet 321, and the normal-temperature air flows through the components such as the rotor 11, the stator 22 and the circuit board inside the motor, so that the effect of circulating heat dissipation is realized.

The rotor assembly 1 is arranged in the stator assembly 2, and the rotor assembly 1 is provided with a wind wheel 13 with a heat dissipation function, namely the integral structure of the direct current brushless motor with the built-in heat dissipation wind wheel is flat. And the wind wheel 13 is composed of a plurality of the blades 132 uniformly arranged in the circumferential direction of the wind wheel body 131. That is, the wind wheel 13 has a flat structure, so that the whole structure of the direct current brushless motor with the built-in heat dissipation wind wheel is flat. Moreover, the shell 3 is provided with an air inlet 321 and an air outlet 311, the wind wheel 13 rotates, hot air in the direct-current brushless motor with the built-in heat dissipation wind wheel is discharged through the air outlet 311, and meanwhile, normal-temperature air is sucked into the direct-current brushless motor with the built-in heat dissipation wind wheel through the air inlet 321, so that the effect of circulating heat dissipation is achieved. The structure can realize the flattening of the direct current brushless motor with the built-in heat dissipation wind wheel while guaranteeing the heat dissipation effect. The motor solves the technical problems that the motor with the heat dissipation wind wheel is overlarge in size, does not accord with the development trend of mechanical equipment towards miniaturization, is difficult to meet the requirement of a user on pursuing miniaturization of the mechanical equipment, and is easy to age and damage motor blades.

Specifically, the blade 132 has an arc shape.

The wind wheel 13 of the arc-shaped blades 132 has a stronger heat radiation effect than the wind wheel 13 of the straight blades 132.

Further, the front housing 32 is provided with a plurality of air inlets 321, the air inlets 321 are disposed on the side wall of the front housing 32, and the rear housing 31 is provided with one air outlet 311.

The front housing 32 is provided with a plurality of air inlets 321, which is beneficial for normal temperature wind to flow into the DC brushless motor with the built-in heat dissipation wind wheel.

While the air inlet 321 is provided at the side wall of the front housing 32, which is a preferred design. Because the front end of the front housing 32 is the output shaft 12, the output shaft 12 is externally connected with mechanical equipment. If the air inlet 321 is disposed at the front end, the mechanical device may block the air inlet direction.

Further, the stator assembly 2 further includes an electric wire 21, and the stator 22 includes a first bobbin 221, a second bobbin 222, a wire buckle 223, a stator core 224, and a stator coil 225; the front end of the stator core 224 is abutted against the first bobbin 221, the rear end of the stator core 224 is abutted against the second bobbin 222, the first bobbin 221 and the second bobbin 222 are fastened together, the first bobbin 221 and the second bobbin 222 are fastened to the front end and the rear end of the stator core 224, respectively, and the stator coil 225 is wound around the first bobbin 221 and the second bobbin 222;

the electric wire 21 is connected to the stator coil 225, and the wire buckle 223 buckles the electric wire 21 between the first wire frame 221 and the wire buckle 223.

The stator assembly 2 is assembled in a simple manner. A first bobbin 221 is provided at a front end of the stator core 224, a second bobbin 222 is provided at a rear end of the stator core 224, and the first bobbin 221 and the second bobbin 222 are connected by a snap-fit connection to fix the stator core 224 between the first bobbin 221 and the second bobbin 222. The stator coil 225 is then wound on the first bobbin 221 and the second bobbin 222. The electric wire 21 is connected to the stator coil 225, and finally the electric wire 21 is fixed to the first bobbin 221 by the wire buckle 223. The above is only one preferred assembly method of the stator assembly 2, and the assembly method of the stator assembly 2 is not limited herein.

When normal temperature wind flows in from the air inlet 321, the normal temperature wind flows through gaps between the stator coils 225, and then is discharged from the wind wheel 13 to the outside of the direct current brushless motor with the built-in heat dissipation wind wheel.

Further, the rotor assembly 1 comprises a first bearing 14, a second bearing 15, the rotor 11, the output shaft 12 and the wind wheel 13;

the rotor 11 comprises magnetic steel 111, a rotor core 112, a first cover plate 113 and a second cover plate 114, wherein the magnetic steel 111 is arranged in the rotor core 112;

The output shaft 12 sequentially passes through the second bearing 15, the wind wheel 13, the second cover plate 114, the rotor core 112, the first cover plate 113 and the first bearing 14; the inner ring of the first bearing 14 is fixedly connected with the output shaft 12, the outer ring of the first bearing 14 is fixedly connected with the front housing 32, the inner ring of the second bearing 15 is connected with the output shaft 12, and the outer ring of the second bearing 15 is fixedly connected with the rear housing 31.

The rotor assembly 1 is simple to assemble. The magnetic steel 111 is arranged in the rotor core 112, then a first cover plate 113 is arranged at the front ends of the magnetic steel 111 and the rotor core 112, a second cover plate 114 is arranged at the rear ends of the magnetic steel 111 and the rotor core 112, the first cover plate 113 and the second cover plate 114 are fixedly connected, and the magnetic steel 111 and the rotor core 112 are fixed between the first cover plate 113 and the second cover plate 114. The output shaft 12 passes through the second bearing 15, the wind wheel 13, the rotor 11 and the first bearing 14 in this order. The above is only one preferred method of assembling the rotor assembly 1, and the method of assembling the rotor assembly 1 is not limited thereto.

In addition, the wind wheel 13 is sleeved on the output shaft 12 and is close to the rotor 11, namely, the structure of the rotor assembly 1 except for the output shaft 12 is relatively flat, so that the structure of the motor is relatively flat.

Further, the rotor assembly 1 further comprises a first snap ring 16 and a second snap ring 17; the output shaft 12 is provided with a first clamping ring groove 121 and a second clamping ring groove 122;

The first snap ring 16 is snapped in the first snap ring groove 121, the second snap ring 17 is snapped in the second snap ring groove 122, the first snap ring 16 abuts against the front end face of the first cover plate 113, the second snap ring 17 abuts against the rear end face of the wind wheel 13, and the first snap ring 16 and the second snap ring 17 fix the first cover plate 113, the rotor core 112, the second cover plate 114 and the wind wheel 13 on the output shaft 12.

The first 16 and second 17 snap rings further facilitate assembly of the rotor assembly 1. The magnetic steel 111 is arranged in the rotor core 112, then a first cover plate 113 is arranged at the front ends of the magnetic steel 111 and the rotor core 112, a second cover plate 114 is arranged at the rear ends of the magnetic steel 111 and the rotor core 112, the first cover plate 113 and the second cover plate 114 are fixedly connected, and the magnetic steel 111 and the rotor core 112 are fixed between the first cover plate 113 and the second cover plate 114. The output shaft 12 is then passed through the rotor 11 and the rotor 13 in sequence. Next, the first snap ring 16 is snapped onto the first snap ring groove 121, and the second snap ring 17 is snapped onto the second snap ring groove 122. The wind wheel 13 and the rotor 11 are limited on the output shaft 12 through the first clamping ring 16 and the second clamping ring 17. Finally, the first bearing 14 is pressed into the front end of the first snap ring 16, and the second bearing 15 is pressed into the rear end of the second snap ring 17.

The first clamping ring 16 and the second clamping ring 17 limit the space between the wind wheel 13 and the rotor 11 on the output shaft 12, so that the rotor 11 and the wind wheel 13 slide along the output shaft 12 when the rotor assembly 1 rotates.

Further, rivets are provided on the rotor 11, and the second cover plate 114, the magnetic steel 111, and the first cover plate 113 are fixed by the rivets.

The magnetic steel 111 is arranged in the rotor core 112, then a first cover plate 113 is arranged at the front ends of the magnetic steel 111 and the rotor core 112, and a second cover plate 114 is arranged at the rear ends of the magnetic steel 111 and the rotor core 112. The rivet sequentially passes through the second cover plate 114, the magnetic steel 111 and the first cover plate 113. That is, the magnetic steel 111 and the rotor core 112 are fixed between the first cover plate 113 and the second cover plate 114, so that the rotor 11 is assembled in a simple and firm manner.

Further, bearing chambers 312 are respectively provided on the front housing 32 and the rear housing 31, the first bearing 14 is disposed in the bearing chamber 312 of the front housing 32, and the second bearing 15 is disposed in the bearing chamber 312 of the rear housing 31;

The direct current brushless motor with the built-in heat dissipation wind wheel further comprises a gasket 4, the gasket 4 is arranged in the bearing chamber 312, the front of the gasket 4 is abutted against the second bearing 15, and the rear of the gasket 4 is abutted against the bearing chamber 312.

The washer 4 is provided in the bearing chamber 312, and serves to adjust the gap between the rear housing 31 and the second bearing 15, and also to absorb shock.

Further, the washer 4 is a wave washer, which can better adjust the gap between the rear housing 31 and the second bearing 15, and can also better absorb shock.

Further, an end of the output shaft 12 remote from the wind wheel 13 protrudes outside the front housing 32.

After the rotor assembly 1 and the stator assembly 2 are assembled, the stator assembly 2 is arranged outside the rotor assembly 1, a front shell 32 is arranged at the front end of the rotor assembly 1 and the front end of the stator assembly 2, and a rear shell 31 is arranged at the rear end of the rotor assembly 1 and the rear end of the stator assembly 2. The first bearing 14 in the rotor assembly 1 circumscribes the front housing 32 and the second bearing 15 in the rotor assembly 1 circumscribes the rear housing 31. Screws pass through the rear housing 31, the stator core 224 and the front housing 32 in sequence to mount the direct current brushless motor with the built-in heat dissipation wind wheel. The above is only one preferred method for assembling the dc brushless motor with the heat dissipation rotor, and the method for assembling the dc brushless motor with the heat dissipation rotor is not limited.

Wherein the output shaft 12 of the rotor assembly 1 extends out of the front housing 32 to circumscribe the machine.

Further, at least one fixing hole 322 is provided on the front housing 32, a shock-proof foot pad 3221 is provided on the fixing hole 322, and a fixing through cavity 32211 is provided on the shock-proof foot pad 3221.

The shock-proof foot pad 3221 is arranged in the fixed hole 322, and the direct-current brushless motor with the built-in heat dissipation wind wheel is assembled on the fixed column in the product through the fixed through cavity 32211, so that the shock-proof and mute effects can be achieved.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims (10)

1. A DC brushless motor with built-in heat dissipation wind wheel is characterized by comprising a rotor assembly, a stator assembly and a shell; the stator assembly and the rotor assembly are arranged in the shell;

The stator assembly includes a stator; the rotor assembly comprises a rotor, an output shaft and a wind wheel; the housing includes a front housing and a rear housing;

The front end and the rear end of the stator are respectively and fixedly connected with the front shell and the rear shell, the output shaft is rotationally arranged in the front shell and the rear shell, the rotor and the wind wheel are respectively and fixedly connected with the output shaft, the output shaft sequentially passes through the rear shell, the wind wheel, the rotor and the front shell, and the rotor is arranged in the stator;

The front shell is provided with an air inlet, the rear shell is provided with an air outlet, and the wind wheel is arranged behind the rotor and the stator assembly; the wind wheel comprises a wind wheel body and blades, the wind wheel body is uniformly provided with a plurality of blades along the circumferential direction, the blades are arranged on one surface of the wind wheel body facing the rotor and the stator, the blades face the front shell, and the air outlet is arranged on the side wall of the rear shell, corresponding to the blades.

2. The direct current brushless motor with a built-in heat dissipation wind wheel according to claim 1, wherein the blades are arc-shaped.

3. The direct current brushless motor with the built-in heat dissipation wind wheel according to claim 1, wherein the front shell is provided with a plurality of air inlets, the air inlets are arranged on the side wall of the front shell, and the rear shell is provided with one air outlet.

4. The direct current brushless motor with built-in heat dissipation wind wheel according to claim 1, wherein the stator assembly further comprises an electric wire, and the stator comprises a first wire frame, a second wire frame, a wire buckle, a stator core and a stator coil; the front end of the stator core is abutted with the first wire frame, the rear end of the stator core is abutted with the second wire frame, the first wire frame and the second wire frame are buckled with each other, the first wire frame and the second wire frame are buckled with the front end and the rear end of the stator core respectively, and the stator coil is wound on the first wire frame and the second wire frame;

The electric wire is connected with the stator coil, and the wire buckle buckles the electric wire between the first wire frame and the wire buckle.

5. The direct current brushless motor with a built-in heat dissipating wind turbine of claim 1, wherein the rotor assembly comprises a first bearing, a second bearing, the rotor, the output shaft, and the wind turbine;

the rotor comprises magnetic steel, a rotor core, a first cover plate and a second cover plate, wherein the magnetic steel is arranged in the rotor core;

The output shaft sequentially passes through the second bearing, the wind wheel, the second cover plate, the rotor iron core, the first cover plate and the first bearing; the inner ring of the first bearing is fixedly connected with the output shaft, the outer ring of the first bearing is fixedly connected with the front shell, the inner ring of the second bearing is connected with the output shaft, and the outer ring of the second bearing is fixedly connected with the rear shell.

6. The direct current brushless motor with a built-in heat dissipation rotor of claim 5, wherein the rotor assembly further comprises a first snap ring and a second snap ring; the output shaft is provided with a first clamping ring groove and a second clamping ring groove;

The first snap ring is buckled in the first snap ring groove, the second snap ring is buckled in the second snap ring groove, the first snap ring is abutted against the front end face of the first cover plate, the second snap ring is abutted against the rear end face of the wind wheel, and the first snap ring and the second snap ring fix the first cover plate, the rotor core, the second cover plate and the wind wheel on the output shaft.

7. The direct current brushless motor with the built-in heat dissipation wind wheel according to claim 5, wherein rivets are arranged on the rotor, and the second cover plate, the magnetic steel and the first cover plate are fixed through the rivets.

8. The DC brushless motor with built-in heat dissipation wind wheel according to claim 5, wherein,

Bearing chambers are respectively arranged on the front shell and the rear shell, the first bearing is arranged in the bearing chamber of the front shell, and the second bearing is arranged in the bearing chamber of the rear shell;

the direct current brushless motor with the built-in heat dissipation wind wheel further comprises a gasket, wherein the gasket is arranged in the bearing chamber, the front of the gasket is abutted against the second bearing, and the rear of the gasket is abutted against the bearing chamber.

9. The direct current brushless motor with a built-in heat dissipation wind wheel according to claim 1, wherein an end of the output shaft away from the wind wheel protrudes out of the front housing.

10. The direct current brushless motor with the built-in heat dissipation wind wheel according to claim 1, wherein at least one fixing hole is arranged on the front shell, a shockproof foot pad is arranged on the fixing hole, and a fixing through cavity is arranged on the shockproof foot pad.