CN210693620U

CN210693620U - Brushless motor of electric hair drier

Info

Publication number: CN210693620U
Application number: CN201922059241.4U
Authority: CN
Inventors: 黄华群
Original assignee: Guangdong Huanengda Electrical Appliances Co Ltd
Current assignee: Guangdong Huanengda Electrical Appliances Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-06-05
Anticipated expiration: 2029-11-26

Abstract

The utility model relates to a household electrical appliances technical field especially relates to a brushless motor of hairdryer. The following technical scheme is adopted: a brushless motor of an electric hair drier comprises a motor shell, a stator and a rotor, wherein the motor shell comprises a front fixing cover, a shell and a rear fixing cover; the shell is provided with a fixed support, and the shell, the rear fixed cover and the fixed support are integrally connected. The utility model has the advantages that: the casing, the rear fixing cover and the fixing support which are connected integrally are used as the casing of the brushless motor, when the brushless motor is installed, the brushless motor is only required to be directly installed on the inner side of the electric hair drier, the assembly is simple and efficient, meanwhile, the fixing support with the air guide pieces is adopted, the resistance of the fixing support to air is greatly reduced, the working efficiency of the electric hair drier is improved, and the air guide pieces can be used as radiating fins of the brushless motor, so that the efficiency of the motor is improved.

Description

Brushless motor of electric hair drier

Technical Field

The utility model relates to a household electrical appliances technical field especially relates to a brushless motor of hairdryer.

Background

The hairdryer is a common domestic appliance, and the structure of hairdryer at present will have the brush motor to fix on the support in the hairdryer mostly to the flabellum is gone up in the assembly, because blockking of hairdryer inner bracket can influence the flow of the inside air of hairdryer, and the installation procedure is loaded down with trivial details, and the output efficiency who has the brush motor simultaneously is low, and calorific capacity is big, and life is also shorter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a brushless motor of hairdryer specifically lies in providing a simple to operate and efficient brushless motor of hairdryer.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a brushless motor of an electric hair drier comprises a motor shell, a stator and a rotor, wherein the motor shell comprises a front fixing cover, a shell and a rear fixing cover; the shell is fixedly provided with a fixed support fixedly connected with the electric hair drier, and the shell, the rear fixed cover and the fixed support are integrally connected.

Furthermore, the fixed support comprises a fixed inner ring and connecting blocks arranged on two sides of the fixed inner ring, connecting holes are formed in the connecting blocks and connected with the inner side of the electric hair drier, and air guide pieces are further arranged on the outer side of the fixed inner ring.

In another scheme, the fixed support comprises a fixed inner ring, a fixed outer ring and a wind guide sheet arranged between the fixed inner ring and the fixed outer ring, and an arc-shaped sliding block or an arc-shaped sliding groove is arranged on the fixed outer ring and is connected with the inner side of the electric hair drier.

Furthermore, the cross section of the air guide sheet is arc-shaped, and the bending direction of the air guide sheet is consistent with the rotating direction of the motor.

Furthermore, the air guide plate is spiral, and the spiral direction of the air guide plate is a direction towards the hair drier for blowing air and rotates spirally along the bending direction of the air guide plate.

Furthermore, a driving circuit board is fixedly arranged on the front fixing cover, the output end of the driving circuit board is electrically connected with a coil of a rotor fixed on the front fixing cover, and the input end of the driving circuit board is electrically connected with a control circuit of the electric hair drier.

Furthermore, the shell, the rear fixing cover and the fixing support are made of aluminum alloy materials.

Specifically, the stator is an outer stator with three-phase six windings, the rotor is a four-pole inner rotor, and the rotor comprises an iron core and an annular permanent magnet arranged outside the iron core.

Specifically, the iron core of the rotor is formed by stacking silicon steel sheets with the thickness of 0.35 mm.

The utility model has the advantages that: the casing, the rear fixing cover and the fixing support which are connected integrally are used as the casing of the brushless motor, when the brushless motor is installed, the brushless motor is only required to be directly installed on the inner side of the electric hair drier, the assembly is simple and efficient, meanwhile, the fixing support with the air guide pieces is adopted, the resistance of the fixing support to air is greatly reduced, the working efficiency of the electric hair drier is improved, and the air guide pieces can be used as radiating fins of the brushless motor, so that the efficiency of the motor is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a brushless motor in embodiment 1;

fig. 2 is a disassembled structure view of the brushless motor in the embodiment 1;

FIG. 3 is a structural exploded view of the fixing bracket and the inner side of the hair dryer in embodiment 2;

FIG. 4 is a structural diagram of the fixed bracket and the inner side of the hair dryer in FIG. 3 after being connected and assembled;

FIG. 5 is a disassembled view of another structure of the fixing bracket and the inner side of the hair dryer in embodiment 2;

fig. 6 is a structural view of the fixed bracket in fig. 5 after being connected and assembled with the inner side of the hair dryer.

Detailed Description

Example 1: referring to fig. 1-2, a brushless motor for an electric hair dryer comprises a motor housing 1, a stator 2 and a rotor 3, wherein the motor housing 1 comprises a front fixing cover 11, a housing 12 and a rear fixing cover 13, the stator 2 is fixedly arranged on the front fixing cover 11, a bearing is arranged at the central position of the front fixing cover 11, the rotor 3 is connected with the bearing on the front fixing cover 11 through a rotating shaft 31, and the housing 12 and the rear fixing cover 13 are sleeved on the stator 2 and the rotor 3 and fixedly connected with the front fixing cover 11; the shell 12 is fixedly provided with a fixed bracket 14 fixedly connected with the electric hair drier, and the shell 12, the rear fixed cover 13 and the fixed bracket 14 are integrally connected.

In this embodiment, the motor housing 1 is divided into two parts, a front fixing cover 11 for fixing the stator 2 and the rotor 3, a middle housing 12 and a rear fixing cover 13 integrally connected with each other and a fixing bracket 14 integrally connected with each other, when the brushless motor needs to be assembled, only the stator 2 and the rotor 3 need to be mounted on the front fixing cover 11, and the integrally connected shell 12, the rear fixing cover 13 and the fixing bracket 14 are sleeved on the stator 2 and the rotor 3 together and fixedly connected with the front fixing cover 11, the assembly of the brushless motor can be completed, and when the brushless motor is assembled to the electric hair drier, only the fixing bracket 14 integrally connected with the shell 12 and the rear fixing cover 13 is connected and fixed with the inner side of the electric hair drier, the installation of the brushless motor can be completed, and finally, the fan blades are only needed to be installed on the rotating shaft of the rotor of the brushless motor, and the brushless motor is connected with the circuit board of the electric hair drier. In addition, the housing 12 is integrally connected with the rear fixing cover 13 and the fixing bracket 14, so that heat generated on the coil of the stator 2 can be rapidly dissipated, and the working efficiency of the brushless motor is improved.

Specifically, a driving circuit board 15 is fixedly arranged on the front fixing cover 11, an output end of the driving circuit board 15 is electrically connected with a coil of the stator 2 fixed on the front fixing cover 11, and an input end of the driving circuit board 15 is electrically connected with a control circuit of the hair dryer. The driving circuit board 15 is used to control the turn-on sequence of the coils on the stator 2 of the brushless motor, thereby controlling the rotation speed and the rotation direction of the rotor 3. The driving circuit board 15 of the present invention adopts a driving circuit commonly used for brushless motors, and its specific structure is not described here.

Specifically, the stator 2 is an outer stator with six three-phase windings, the rotor 3 is a four-pole inner rotor, and the rotor 3 includes an iron core 31 and an annular permanent magnet 33 arranged outside the iron core 32; the iron core 32 of the rotor 3 is formed by stacking silicon steel sheets with a thickness of 0.35 mm. The winding of the stator 2 adopts a star-shaped (i.e. Y-shaped) connection mode, the principle of the rotation of the rotor 3 is that the N pole of the rotor 3 and the S pole of the electrified winding have an aligned movement trend, the S pole of the rotor 3 and the N pole of the electrified winding have an aligned movement trend, and the magnetic pole direction on the winding can be controlled by controlling the current direction of the winding on the stator 2, so that the rotation of the rotor 3 is controlled. The iron core 32 of the rotor 3 is formed by stacking 0.35mm silicon steel sheets, can participate in the operation of the magnetic circuit, and can reduce the magnetic resistance, thereby improving the working efficiency of the brushless motor. Because the brushless motor does not need a reversing electric brush, a larger connecting resistance between the electric brush and the coil is avoided, the working efficiency of the motor is improved, the motor maintenance problem caused by electric brush loss is avoided, and the service life of the motor is prolonged.

In a further embodiment, the fixing bracket 14 includes a fixing inner ring 141 and connecting blocks 144 disposed at both sides of the fixing inner ring 141, the connecting blocks 144 are provided with connecting holes for connecting with the inside of the hair dryer, and the outside of the fixing inner ring 141 is further provided with air guiding sheets 143.

The connecting block 144 on the fixing bracket 14 is used for connecting with another connecting hole inside the hair dryer, so as to fix the brushless motor in the hair dryer, the fixing inner ring 141 is used for connecting the air guide plate 143, the air guide plate 143 can guide the air blown by the inner fan blade of the hair dryer, when the inner fan blade of the hair dryer rotates, the air in the hair dryer is driven to flow spirally, the air guide plate 143 can reduce the resistance of the fixing bracket 14 to the air, so as to improve the working efficiency of the hair dryer.

Further, the cross section of the air guiding sheet 143 is arc-shaped, and the bending direction of the air guiding sheet 143 is consistent with the rotation direction of the motor; the arc-shaped air guiding sheet 143 can follow the direction of the air rotating flow, thereby further reducing the resistance of the fixed bracket 14 to the air and further improving the working efficiency of the electric hair drier.

Furthermore, the wind guiding plate 143 is spiral, and the spiral direction of the wind guiding plate 143 is a direction toward the hair dryer and the spiral direction is a direction that the wind guiding plate 143 is bent to rotate and spiral, so that the spiral wind guiding plate 143 can further reduce the resistance to the air, and improve the working efficiency of the hair dryer.

Example 2: referring to fig. 3-6, in another solution, compared with embodiment 1, the fixing bracket 14 includes a fixing inner ring 141, a fixing outer ring 142 and a wind guiding plate 143 disposed between the fixing inner ring 141 and the fixing outer ring 142, and an arc-shaped sliding block 145 or an arc-shaped sliding groove 146 disposed on the fixing outer ring 142 is connected to the inside of the hair dryer.

In this embodiment, the connecting block 144 on the fixing bracket 14 is omitted, the fixing outer ring 142 is used to connect the inner side of the hair dryer, the connecting block 144 is reduced, the wind guiding sheets 143 arranged on the fixing inner ring 141 and the fixing outer ring 142 play a supporting role, and the plurality of wind guiding sheets 143 arranged on the fixing bracket 14 can ensure enough supporting force for the motor and greatly reduce the resistance of the fixing bracket 14 to air, thereby improving the working efficiency of the hair dryer. Specifically, the fixed outer ring 142 can be connected with the inner side of the hair dryer through an arc-shaped sliding block 145 or an arc-shaped sliding groove 146, as shown in the attached drawings, the arc-shaped sliding block 145 can be arranged on the fixed outer ring 142, the arc-shaped sliding groove 146 is arranged on the inner side of the hair dryer, and the arc-shaped sliding groove 146 on the hair dryer is integrally connected with the outer shell of the hair dryer; an arc-shaped chute 146 can be arranged on the fixed outer ring 142, and an arc-shaped sliding block 145 is arranged on the inner side of the electric hair drier, so that the fixed outer ring 142 is stably connected with the inner side of the electric hair drier; it should be mentioned that, in order to prevent the fixed bracket 14 and the inner side of the hair dryer from rotating during the rotation of the motor, the tail end or the head end of the arc chute 146 along the rotation direction of the motor can be sealed, so as to prevent the fixed bracket 14 and the inner side of the hair dryer from rotating and displacing; specifically, when the arc-shaped sliding block 145 is disposed on the fixing bracket 14 and the arc-shaped sliding groove 146 is disposed in the hair dryer, the arc-shaped sliding groove 146 is sealed at the end of the rotation direction of the motor, and when the arc-shaped sliding block 145 is disposed inside the hair dryer and the arc-shaped sliding groove 146 is disposed on the fixing bracket 14, the arc-shaped sliding groove 146 is sealed at the head end of the rotation direction of the motor.

Further, the shell 12, the rear fixing cover 13 and the fixing bracket 14 are made of aluminum alloy materials; the shell 12, the rear fixing cover 13 and the fixing support 14 are integrally connected and made of aluminum alloy materials, and can be used as radiating fins to timely radiate heat generated by coil winding on the stator 2, so that the working efficiency of the motor is improved.

Of course, the above is only the preferred embodiment of the present invention, and the application range of the present invention is not limited thereto, so all the equivalent changes made in the principle of the present invention should be included in the protection range of the present invention.

Claims

1. The utility model provides a brushless motor of hairdryer, includes motor housing, stator and rotor, its characterized in that: the motor shell comprises a front fixed cover, a shell and a rear fixed cover, wherein a stator is fixedly arranged on the front fixed cover, a bearing is arranged in the center of the front fixed cover, a rotor is connected with the bearing on the front fixed cover through a rotating shaft, and the shell and the rear fixed cover are sleeved on the rotor and the stator and are fixedly connected with the front fixed cover; the shell is fixedly provided with a fixed support fixedly connected with the electric hair drier, and the shell, the rear fixed cover and the fixed support are integrally connected.

2. A brushless motor for a hair dryer as set forth in claim 1, wherein: the fixed support comprises a fixed inner ring and connecting blocks arranged on two sides of the fixed inner ring, connecting holes are formed in the connecting blocks and connected with the inner side of the electric hair drier, and air guide plates are further arranged on the outer side of the fixed inner ring.

3. A brushless motor for a hair dryer as set forth in claim 1, wherein: the fixed support comprises a fixed inner ring, a fixed outer ring and a wind guide sheet arranged between the fixed inner ring and the fixed outer ring, and an arc-shaped sliding block or an arc-shaped sliding groove is arranged on the fixed outer ring and is connected with the inner side of the electric hair drier.

4. A brushless motor for a hair dryer according to claim 2 or 3, characterized in that: the cross section of the air guide sheet is arc-shaped, and the bending direction of the air guide sheet is consistent with the rotating direction of the motor.

5. A brushless motor for a hair dryer as set forth in claim 4, wherein: the wind guide plate is spiral, and the spiral direction of the wind guide plate is towards the blowing direction of the hair drier and rotates spirally along the bending direction of the wind guide plate.

6. A brushless motor for a hair dryer according to claim 2 or 3, characterized in that: the electric hair drier is characterized in that a driving circuit board is fixedly arranged on the front fixing cover, the output end of the driving circuit board is electrically connected with a coil of a rotor fixed on the front fixing cover, and the input end of the driving circuit board is electrically connected with a control circuit of the electric hair drier.

7. A brushless motor for a hair dryer as set forth in claim 6, wherein: the stator is an outer stator with three-phase six windings, the rotor is a four-pole inner rotor, and the rotor comprises an iron core and an annular permanent magnet arranged outside the iron core.

8. A brushless motor for a hair dryer as set forth in claim 7, wherein: the iron core of the rotor is formed by stacking silicon steel sheets with the thickness of 0.35 mm.

9. A brushless motor for a hair dryer as set forth in claim 8, wherein: the shell, the rear fixing cover and the fixing support are made of aluminum alloy materials.