CN215897463U

CN215897463U - Flat brushless heat dissipation motor and electronic equipment

Info

Publication number: CN215897463U
Application number: CN202122143223.1U
Authority: CN
Inventors: 焦伟超; 刘羽炼; 朱群馨
Original assignee: Guizhou Guolong Dynamo Electricity Co ltd
Current assignee: Sichuan Awa Seimitsu Electric Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-02-22
Anticipated expiration: 2031-09-07

Abstract

The utility model relates to the technical field of heat dissipation motors of portable electronic equipment, and discloses a flat brushless heat dissipation motor, which comprises an upper shell, a rotor assembly, a stator assembly, a lower shell and a fixed shaft, wherein the upper shell is provided with a plurality of through holes; the upper shell and the lower shell are buckled to form an accommodating space, the rotor assembly is sleeved on the fixed shaft and is arranged in the accommodating space with the stator assembly at intervals, and the upper shell is provided with an air inlet and an air outlet; the heat dissipation motor is arranged in a shell of the electronic equipment, the shell is provided with a vent hole, the vent hole is adjacent to the air outlet, the rotor assembly rotates to drive the heat dissipation fins to generate airflow, hot airflow in the shell of the electronic equipment is sucked from the air inlet of the upper shell and is exhausted out of the shell of the electronic equipment through the air outlet and the vent hole, heat dissipation of the electronic equipment is quickly achieved, power consumption of the electronic equipment is reduced, and the service life of the electronic equipment is prolonged.

Description

Flat brushless heat dissipation motor and electronic equipment

Technical Field

The utility model relates to the technical field of heat dissipation motors, in particular to a flat brushless heat dissipation motor and electronic equipment.

Background

The heat of the mobile phone is always a very painful problem for mobile phone manufacturers, and once the mobile phone is overheated or abnormally cooled, the problems of frequency reduction of a processor, abnormal power consumption and the like follow the mobile phone, and even the mobile phone chip is damaged when the frequency is reduced or the power consumption is serious. In order to enable the mobile phone to be rapidly cooled, a scheme of built-in heat dissipation such as liquid cooling heat dissipation, copper pipe heat dissipation or graphene heat dissipation appears in the prior art, the scheme can effectively reduce the temperature of the mobile phone during operation, and achieves the heat dissipation effect, but the scheme is high in processing difficulty and cost and is not suitable for popularization of a low-end computer.

Because the mobile phone is heated, more background running programs are usually started or large-scale applications are run, and some mobile phone manufacturers cooperate to release an external mobile phone radiator for reducing the running temperature of the mobile phone. The cooling scheme is that the external fan is used for continuously blowing air to the rear cover of the mobile phone, so that heat generated by the mobile phone is rapidly taken away. However, the scheme needs to be connected with an external power supply, and is installed at the back of the mobile phone to indirectly increase the volume of the mobile phone.

Therefore, the radiator which is built in the mobile phone and easy to popularize is developed, and the radiator has high application value.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of large volume and high cost of an external heat dissipation structure in the prior art, the utility model provides a brushless flat heat dissipation motor. The specific technical scheme is as follows:

a flat brushless heat dissipation motor comprises an upper shell, a rotor assembly, a stator assembly, a lower shell and a fixed shaft; the upper casing comprises a first top and a first side wall, the upper casing and the lower casing are buckled to form an accommodating space, the rotor assembly is sleeved on the fixed shaft and is arranged in the accommodating space with the stator assembly at intervals, the first top is provided with an air inlet, and the first side wall is provided with an air outlet; the rotor assembly is provided with cooling fins, and the cooling fins are located between the air inlet and the air outlet.

Further, the rotor assembly includes a yoke piece, a ring magnet, and a heat sink; the yoke piece and the annular magnet are both embedded in the radiating fin, and the radiating fin and the annular magnet are respectively bonded to two surfaces of the yoke piece.

Further, the cooling fin comprises a second top, a second side wall vertically extending from the edge of the second top, and fan blades outwardly diverging from the outer peripheral surface of the second side wall.

Further, the cooling fin is provided with at least two fan blades.

Furthermore, the first top part comprises a fixing part positioned at the central position and at least two spokes radially arranged outwards from the edge of the fixing part, and the spokes surround to form the air inlet; the inner surface of the fixed part is bonded with a fixed sliding sheet.

Further, the stator assembly comprises a PCB, a coil and a Hall element, wherein the coil and the Hall element are adhered to the PCB, and the PCB comprises a circular inner terminal and an outer terminal which extends outwards from one end of the inner terminal and extends out of the accommodating space.

Furthermore, the lower case comprises a chassis matched with the PCB in shape and a third side wall bent and extended from the chassis to the upper case; an annular mounting part is integrally and convexly arranged at the central position of the chassis; the third side wall is provided with an opening through which the external wiring terminal extends out of the accommodating space, and the fixing shaft is fixed in the annular mounting part.

Further, a bearing is arranged between the rotor assembly and the fixed shaft; the bearing and the rotor assembly are connected in a pressing mode or are integrally formed in an injection molding mode; the bearing is sleeved on the fixed shaft with a gap.

Further, still the cover is equipped with the packing ring on the fixed axle, the packing ring is located annular installation department with between the bearing.

An electronic device comprises a shell and is characterized by further comprising the flat brushless heat dissipation motor, wherein the flat brushless heat dissipation motor is located inside the shell, the shell is provided with a vent hole, and the vent hole is adjacent to the air outlet.

The utility model has the beneficial effects that: the flat brushless radiating motor has a small structure volume, the size is easy to match with the inside of the mobile phone, the flat brushless radiating motor can be directly used as a built-in radiator of the mobile phone, hot air enters through the air inlet, is radiated through the radiating fins and then is discharged through the air outlet, the air outlet can be adjacent to an external through hole of electronic equipment, and the internal temperature of the electronic equipment such as the mobile phone can be quickly reduced.

Drawings

Fig. 1 is a schematic structural diagram of a heat dissipation motor according to the present invention.

Fig. 2 is a schematic structural diagram of the upper housing of the present invention.

Fig. 3 is a schematic view of the structure of the rotor assembly of the present invention.

Fig. 4 is a schematic view of the construction of a stator assembly of the present invention.

Fig. 5 is a schematic structural diagram of the lower housing of the present invention.

Fig. 6 is a sectional view of the heat dissipation motor of the present invention.

Fig. 7 is a schematic view of the connection of the present invention to an electronic device housing.

Wherein:

1-an upper housing; 11-a first top; 111-air inlet; 112-a fixed part; 113-spokes;

12-a first side wall; 121-air outlet;

2-a rotor assembly; 21-a heat sink; 211-a second top; 2111-first via;

212-a second side wall; 213-fan blades;

22-a yoke piece; 221-a second via; 23-a ring magnet; 231-third via holes;

3-a stator assembly; 31-a PCB board; 311-internal terminals; 3111-a fourth via; 312-external terminals;

32-a coil; 33-a hall element;

4-a lower housing; 41-a chassis; 411-annular mounting part; 42-a second side wall; 421-opening;

5, fixing a shaft; 51-a gasket; 52-a bearing; 53-sliding vane;

100-flat brushless heat dissipating motor;

200-a housing; 201-air vent.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a built-in brushless flat heat dissipation motor 100, the structure of which is shown in fig. 1, and the motor comprises an upper machine shell 1, a rotor assembly 2, a stator assembly 3, a lower machine shell 4 and a fixed shaft 5, wherein the upper machine shell 1 and the lower machine shell 4 are buckled to form an accommodating space, and the rotor assembly 2 and the stator assembly 3 are positioned in the accommodating space. One end of the fixed shaft 5 is fixed on the lower shell 4, and the other end of the fixed shaft penetrates through the stator assembly 3 and the rotor assembly 2, and the top of the fixed shaft 5 is fixedly connected with the upper shell 4.

The upper casing 1 is of a hollow flat barrel-shaped shell structure as shown in fig. 2, and comprises a first top 11 and a first side wall 12 extending vertically downwards along the edge of the first top 11; the top surface 11 is provided with an air inlet 111 and the first side wall is provided with an air outlet 121. The hot air enters from the air inlet 111, is radiated by the heat sink 21, and finally flows out from the air outlet 121. Specifically, the first top portion 11 is a circular plane, a circular fixing portion 112 is disposed at a center of the circular plane, four spokes 113 are radially disposed at an edge of the fixing portion 112, and the spokes 113 enclose an air inlet 111. The air outlet 121 is a notch formed in the first sidewall 12, and the position and size of the notch are matched with the external terminal of the stator assembly 3. The fixing portion 112 is used for limiting the fixing shaft 5.

The rotor assembly 2 has a structure as shown in fig. 3, and includes a heat sink 21, a yoke plate 22, and a ring magnet 23, wherein the yoke plate 22 and the ring magnet 23 are respectively fitted on the inner side surface of the heat sink 21, and the heat sink 21 and the ring magnet 23 are respectively adhered to both surfaces of the yoke plate 22 by glue. The heat sink 21 includes a second top 211, a second sidewall 212, and fan blades 213 integrally formed. Specifically, in fig. 3, the second top 211 is a circular column, the second sidewall 212 extends vertically downward from the edge of the second top 211, and the fan blades 213 are outwardly divergent from the second sidewall 212 and arranged in a clockwise or counterclockwise direction. The second top 211 has a first through hole 2111 formed in a concentric circle at the center thereof, and the second top 211 and the second sidewall 212 enclose a space for installing the yoke plate 22 and the ring magnet 23. The fan blade 213 has a variable cross-section structure, and the cross-section of the fan blade is a curved quadrilateral, and the cross-section of the fan blade gradually increases from one end near the second sidewall 212 to the other end. The projection of the fan blade 213 in the vertical direction is located between the air inlet 111 and the upper housing 1, one end of the fan blade 213 close to the second side wall 212 is located below the air inlet 111, the free end of the tail end of the fan blade 213 far away from the second side wall 212 is located inside the upper housing 1, and the fan blade 213 is shielded by the upper housing 1 to prevent the fan blade 213 from being damaged and deformed.

The yoke plate 22 is provided with a second through hole 221 at a position corresponding to the first through hole 2111, the ring magnet 23 is provided with a third through hole 231 at a position corresponding to the first through hole 2111, and when the yoke plate 22 and the ring magnet 23 are embedded in the heat sink 21, the first through hole 2111, the second through hole 221 and the third through hole 231 are communicated and respective centers of circles are located on the same axis. Compared with the existing miniature radiating fan, the radiating fins 212 of the utility model have small area and large quantity, thus the wind pressure is small and the noise is low.

As shown in fig. 4, the stator assembly 3 includes a PCB 31, a coil 32 adhered to the PCB 31 and electrically connected thereto, and a hall element 33 adhered to the PCB 31 and electrically connected thereto. The PCB board 31 includes a circular inner terminal 311 having a fourth through hole 3111 and an outer terminal 312 outwardly extending from one end of the inner terminal 311. The external terminal 312 is located outside the heat-dissipating motor case for connecting an external power source, and the internal terminal 311 is located inside the heat-dissipating motor case for supplying power to the coil 32 and the hall element 33. The coil 32 is positioned and fixed by a glue layer coated on the PCB 31 in advance, and a lead is led out and soldered to a pad on the PCB 31. The hall element 33 controls the direction of the current in the coil 32, thereby changing the direction of the magnetic field generated by the coil 32, and causing the ring magnet 23 disposed above the coil 32 to repel each other, thereby generating a rotational motion.

The lower housing 4 is constructed as shown in fig. 5, and includes a bottom plate 41 shaped to fit the PCB 31 and a third sidewall 42 upwardly protruded from the bottom plate 41. The bottom plate 41 is provided at the middle with an annular mounting portion 411 for fixing the shaft 5, and the side wall is provided with an opening 421 at a position corresponding to the external terminal 312. The PCB board is attached to the bottom plate 41 of the lower housing 4 and extends outward from the opening of the second side wall 42 of the lower housing 4 to form an external terminal 312. The second sidewall 42 of the lower housing 4 is fastened with the first sidewall 12 of the upper housing 1 to form an inner receiving space.

As shown in fig. 6, the fixing shaft 5 is inserted into the annular mounting portion 411 having one end fixed to the chassis 41 from the rear surface of the lower housing 4, and the other end is fixedly coupled to the mounting portion 121 of the upper housing 1 through the fourth through hole 3111 of the PCB 31, the third through hole 231 of the annular magnet 23, the second through hole 221 of the yoke plate 22, and the first through hole 2111 of the heat sink 21 in this order. A bearing 52 is also provided between the first through hole 2111 of the heat sink 21 and the stationary shaft 5, the bearing 52 being for carrying radial and axial loads. In order to adjust the axial height of the rotor assembly 2, a washer 51 is sleeved on the fixed shaft 5, and the washer 51 is positioned between the annular mounting part 411 and the bearing 52. The fixed shaft 5 is further provided with a sliding plate 53 at an end close to the upper casing 1, and the sliding plate 53 is fixed on the fixing portion 112 of the upper casing 1 for spacing the upper casing 1 and the heat sink 23, and simultaneously preventing a bearing on the rotor assembly from directly rubbing against the upper casing.

As shown in fig. 7, an electronic device includes a housing 200, a vent 201 is disposed on the housing 200, and a flat brushless heat dissipation motor 100 of the present invention is disposed adjacent to the vent 201. In use, heat near the chip or the battery is conducted to the flat brushless heat dissipation motor 100 through the heat conduction device. The hot air is radiated by the heat radiation fins 21 and then flows out through the vent holes 201.

The utility model is that the upper casing 1 is provided with an air inlet 11 and an air outlet 13, and the annular magnet 23 drives the radiating fins 21 to rotate through the mutual exclusion magnetic field between the electrified coil 32 and the annular magnet 23. The cooling fins 21 are provided with a large number of fan blades with small area, and the generated wind pressure is small and the noise is low; meanwhile, one end of the radiating fin is positioned below the air inlet 11, and the tail end of the free end is positioned below the shell of the upper shell 1, so that the air can be quickly acted, and the radiating fin 21 can be prevented from being damaged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A flat brushless heat dissipation motor comprises an upper shell, a rotor assembly, a stator assembly, a lower shell and a fixed shaft; the upper casing comprises a first top and a first side wall, the upper casing and the lower casing are buckled to form an accommodating space, the rotor assembly is sleeved on the fixed shaft and is arranged in the accommodating space with the stator assembly at intervals, and the upper casing is characterized in that the first top is provided with an air inlet, and the first side wall is provided with an air outlet; the rotor assembly is provided with cooling fins, and the cooling fins are located between the air inlet and the air outlet.

2. The flat brushless heat dissipating motor of claim 1, wherein the rotor assembly comprises a yoke plate, a ring magnet, and a heat sink; the yoke piece and the annular magnet are both embedded in the radiating fin, and the radiating fin and the annular magnet are respectively bonded to two surfaces of the yoke piece.

3. The flat brushless heat dissipating motor of claim 2, wherein the heat sink comprises a second top, a second sidewall extending perpendicularly from an edge of the second top, and fan blades diverging outwardly from an outer circumferential surface of the second sidewall.

4. The flat brushless heat dissipating motor of claim 3, wherein the heat sink is provided with at least two blades.

5. The flat brushless heat dissipating motor of claim 1, wherein the first top portion comprises a fixed portion at a central position and at least two spokes radially disposed from an edge of the fixed portion, the spokes surrounding the air inlet; the inner surface of the fixed part is bonded with a fixed sliding sheet.

6. The flat brushless heat-dissipating motor according to claim 1, wherein the stator assembly includes a PCB board including a circular inner terminal and an outer terminal extending outward from one end of the inner terminal and issuing the receiving space, a coil adhered to the PCB board, and a hall element.

7. The flat brushless heat dissipating motor of claim 6, wherein the lower housing comprises a bottom plate having a shape corresponding to the PCB board, and a third sidewall bent and extended from the bottom plate toward the upper housing; an annular mounting part is integrally and convexly arranged at the central position of the chassis; the third side wall is provided with an opening through which the external wiring terminal extends out of the accommodating space, and the fixing shaft is fixed in the annular mounting part.

8. The flat brushless heat dissipating motor of claim 7, wherein a bearing is disposed between the rotor assembly and the stationary shaft; the bearing and the rotor assembly are connected in a pressing mode or are integrally formed in an injection molding mode; the bearing is sleeved on the fixed shaft with a gap.

9. The flat brushless heatsink motor of claim 8, further comprising a washer disposed over the stationary shaft, the washer being disposed between the annular mounting portion and the bearing.

10. An electronic device comprising a housing, and further comprising the flat brushless heat dissipating motor according to any one of claims 1 to 9, wherein the flat brushless heat dissipating motor is located inside the housing, and the housing is provided with a vent hole, and the vent hole is adjacent to the air outlet.