KR101725092B1 - Fan motor - Google Patents

Fan motor Download PDF

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Publication number
KR101725092B1
KR101725092B1 KR1020150110126A KR20150110126A KR101725092B1 KR 101725092 B1 KR101725092 B1 KR 101725092B1 KR 1020150110126 A KR1020150110126 A KR 1020150110126A KR 20150110126 A KR20150110126 A KR 20150110126A KR 101725092 B1 KR101725092 B1 KR 101725092B1
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KR
South Korea
Prior art keywords
fan motor
lower case
case
present
circuit board
Prior art date
Application number
KR1020150110126A
Other languages
Korean (ko)
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KR20170016692A (en
Inventor
장정철
박경수
류민호
Original Assignee
뉴모텍(주)
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Priority to KR1020150110126A priority Critical patent/KR101725092B1/en
Publication of KR20170016692A publication Critical patent/KR20170016692A/en
Application granted granted Critical
Publication of KR101725092B1 publication Critical patent/KR101725092B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan motor used for discharging the cold air of a refrigerator to the outside or for circulating air inside and outside the device such as a thermo-hygrostat, The present invention relates to a fan motor assembly structure capable of easily assembling without fluidity and at the same time preventing external moisture penetration to the utmost. A fan motor according to the present invention comprises a rotary shaft fitted to a center of a rotor provided at the center of a lower case by a bearing; A stator disposed radially around the rotor; An upper and a lower insulator sandwiched between the upper and lower portions of the stator; And an upper case coupled to the lower case. The fan motor includes a lower case and a lower case. The lower case has a fitting boss protruding therefrom. The lower case has a fitting boss formed on an outer side of the upper case corresponding to the boss, And a power line immovable member is formed on the coil guide above the upper insulator by ultrasonic welding and fusing.

Description

Fan motor {FAN MOTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fan motor used for discharging cold air of a refrigerator to the outside or for circulating air inside and outside a device such as a thermo-hygrostat. More particularly, the present invention relates to a fan motor that can prevent moisture penetration from the outside to the inside of a fan motor, and can assemble the power supply line for driving the fan motor quickly and without fluidity, thereby improving workability .

Generally, a fan motor used for blowing cold air of a refrigerator or circulating air inside and outside of a device is often installed in an environment where there is a lot of moisture or condensation due to a temperature change. Therefore, various structures have been studied to prevent the motor from penetrating into the motor and causing a failure.

Korean Patent No. 10-0511324, No. 10-1074935 and U.S. Patent No. 6,577,031 disclose a technique for manufacturing a motor housing by resin molding by insert injection with a stator and a printed circuit board of a motor. According to these patents, since the motor housing is manufactured by resin molding so that the stator and the printed circuit board are embedded in the inside, moisture can not penetrate into the motor, and the structure has an efficient structure.

However, the manufacturing of the motor by the above-mentioned insert injection has a problem in that the process and cost required for insert injection such as the production of a mold are increased. In addition, it is difficult to automate all the processes because the insert injection process is required.

In order to solve this problem, the present applicant has disclosed Korean Patent No. 10-1520183 entitled "Fan Motor ". According to the present invention, there is proposed a fan motor which has a new structure utilizing a structure in which a stator is disposed inside a bracket and a printed circuit board is installed outside a bracket to seal the housing, and at the same time, the housing structure is improved.

However, in this case, in assembling the fan motor, it is necessary to combine the annular recessed portion of the first bracket and the annular protruding edge of the second bracket after the internal components are assembled to prevent moisture from penetrating into the motor through ultrasonic welding However, since the third bracket of the non-coupling type material is additionally assembled with the second bracket, the number of parts constituting the motor increases, resulting in an increase in the manufacturing cost of the motor. Particularly, in assembling the second bracket, The flange portion and the third bracket are screwed to each other to assemble the first and second brackets.

An object of the present invention is to improve the workability by reducing the number of parts constituting the fan motor to reduce the manufacturing cost of the motor and at the same time to provide quickness of motor assembly.

Another object of the present invention is to prevent moisture penetration to a stator, a rotor, and a printed circuit board disposed in a motor as much as possible.

It is another object of the present invention to provide a power supply line for supplying power to a printed circuit board without being flowed or twisted so that the stability of the motor configuration can be improved.

The above objects and other intrinsic objects of the present invention can be easily achieved by the present invention described below.

A fan motor according to the present invention includes a rotary shaft 30 fitted to a center of a rotor 20 installed at the center of a lower case 10 by a bearing 21; A stator 40 radially disposed around the outer periphery of the rotor 30; Upper and lower insulators 50 and 60 sandwiched between the upper and lower portions of the stator 40; And an upper case (70) coupled to the lower case,

A printed circuit board (80) coupled with a fixing member (51) disposed around the upper insulator (50);

A protective lid 90 covering the upper portion of the printed circuit board 80 is disposed inside the lower case 10 and the upper case 70,

A fitting boss 11 is formed on the outer side of the lower case 10 so that the fitting boss 11 of the lower case 10 and the fitting recessed portion 71 of the upper case 70 are engaged, (110) is formed on the outer circumference of the base (50).

In the present invention, a fixing flange portion 72 formed with engagement holes 72 'on both sides of the upper case 70 may be formed integrally with the upper case.

In the present invention, the locking protrusion 110 may be formed with a locking recess 110 'into which the power line 100 is inserted.

In the present invention, a cutout groove 110 '' is formed outside the engaging recessed portion 110 'of the power source line flow preventing fitting 110 so that the engaging recessed portion 110' is elastically biased inward and outward .

In the present invention, it is preferable to further include a plurality of coil guides (52) formed on the outer periphery of the upper insulator, wherein a height of the power source line flow prevention plugs (110) is equal to or higher than a height of the coil guides Do.

According to the present invention, the printed circuit board is disposed inside the upper and lower cases, and the upper case and the lower case are joined by ultrasonic welding, thereby preventing malfunction of the control circuit disposed on the printed circuit board due to external moisture penetration.

In addition, the present invention can reduce the number of assembled parts constituting the motor by incorporating parts for motor driving inside the upper and lower cases, thereby reducing the manufacturing cost, and at the same time, Effect.

Further, according to the present invention, it is possible to provide the small motor by reducing the weight and the size of the whole motor by constituting the fixed flange portion integrally protrudingly formed on both sides of the upper case without separate brackets in addition to the upper and lower cases, So that it is possible to provide convenience in the installation of the apparatus.

Further, the present invention has an effect of stabilizing the motor structure by allowing the power source line for supplying power to the printed circuit board to flow or to be twisted without mutual twist.

1 is a perspective view showing a fan motor according to the present invention.
2 is a perspective view seen from the bottom of Fig.
FIG. 3 is a perspective view of the fan motor according to the present invention.
4 is a longitudinal sectional view of a fan motor according to the present invention.
5 is a perspective view illustrating an upper case of the fan motor according to the present invention in exploded view.
6 is a perspective view showing a part of a stator and an upper insulator of a fan motor according to the present invention.
7 is a plan view showing a state in which a power line is connected to a printed circuit board of a fan motor according to the present invention.
8 is a perspective view showing an example of the installation of the fan motor according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a fan motor according to the present invention, FIG. 2 is a perspective view seen from the bottom of FIG. 1, FIG. 3 is a perspective view of a fan motor according to the present invention, Fig. 5 is a perspective view of an upper case of the fan motor according to the present invention in an exploded perspective view.

1 to 5, a fan motor according to the present invention includes a rotary shaft 30 fitted in a center of a rotor 20 installed at the center of a lower case 10 by a bearing 21; A stator 40 radially disposed around the outer periphery of the rotor 30; Upper and lower insulators 50 and 60 sandwiched between the upper and lower portions of the stator 40; A printed circuit board (80) including an upper case (70) coupled with the lower case and coupled with a plurality of materials (51) disposed around the upper insulator (50); A protective lid 90 covering the upper portion of the printed circuit board 80 is disposed in the lower case 10 and the upper case 70. A plurality of coils A guide 52 and a power source line flow preventing fitting 110 are formed.

When the lower case 10 and the upper case 70 are engaged with each other, the fitting bellows 11 is protruded outside the lower case 10, A fitting recessed portion 71 is formed on the outer side of the case 70 so that the fitting recessed portion 11 and the fitting recessed portion 71 are ultrasonic welded to each other. It is of course possible to deform the fitting fitting portion 11 into the shape of the fitting portion and the fitting fitting portion 71 into the shape of the bending portion.

In addition, the present invention is constituted by integrally protruding a fixed flange portion 72 formed with engagement holes 72 'on both sides of the upper case 70. When the assembled fan motor is installed inside a device such as a refrigerator, As shown in FIG. 8, the fixing flange portions 72 on both sides of the lower case 10 may be inserted into the frame of the refrigerator and then screwed together through the fitting holes 72 '. In the present invention, it is preferable that two or more flange portions 74 are formed, and more preferably, the plurality of flange portions 74 have positions symmetrical to each other.

7, since the printed circuit board 80 constituting the present invention is disposed inside the upper and lower cases 70 and 10, To the connection point 81 side of the printed circuit board 80 disposed above the connection terminal 50 and connected thereto through soldering. 5, the power line 100 is guided to each of the partition guide pieces 74 formed on the power line feed guide 73 formed on one side of the upper case 70, Since the distance between the partition guide piece 74 and the connection point 81 between the partition guide piece 74 and the printed circuit board 80 is somewhat different from that of the partition guide piece 74, The power line 100 located at a distance from the connection point 81 of the circuit board 80 may be moved due to an external impact or the like and may be separated from the original position or may be twisted.

In order to solve this problem, according to the present invention, as shown in FIG. 6, a power line blocking protrusion 110 is formed on the outer periphery of the upper insulator 50, It is possible to prevent the power line 100 from being flowed while preventing the power line 100 from being twisted by forming the latching recessed portion 110 ' The height of the power source line flow preventing fittings 110 may be the same or higher than the height of the other coil guides 52.

When the power line 100 is inserted and fixed to the latching recessed portion 110 'formed in the power line flow preventive fitting 110, if it is desired to maintain the fitting without being fluidized in a more rigid state, A cutout groove 110 '' may be formed on the outside of the mouth 110 'so that an elastic force is applied to the inside and outside of the catching recess 110'. In this case, The power supply line 100 is fitted with the engaging recessed portion 110 'opened outward according to the diameter of the power supply line 100 and then the engaging recessed portion 110' is restored to the engaging recessed portion 110 ' The upper insulator 50 and the power source line flow preventing fitting 110 may be formed on the upper surface of the upper insulator 50 and the upper surface of the upper insulator 50. In this case, The power source line flow prevention fittings 110 and the catches 110, It is advantageous from the viewpoint of workability that at least one side of the recessed portion 110 'is connected to at least one side thereof and then the latching recessed portion 110' is bent around the connected side so as to be positioned as shown in FIG.

According to the present invention, a rotary shaft (30) is fitted in a center of a rotor (20) provided in the center of a lower case (10) by a bearing (21); A stator 40 radially disposed around the outer periphery of the rotor 30; Upper and lower insulators 50 and 60 sandwiched between the upper and lower portions of the stator 40; And an upper case 70 coupled to the lower case 10 is assembled and assembled. A coil for driving a motor is wound around a plurality of teeth arranged at predetermined intervals in the radial direction on the inside of the upper and lower insulators 50 and 60 sandwiched between the upper and lower portions of the stator 40, The fixing member 51 and the printed circuit board 80 are connected to each other and the partition guide piece 74 formed in the power line feed guide 73 and the power line inflow preventing fitting 110 are engaged The end portion of the power supply line 100 inserted and guided by the recessed portion 110 'is connected to the connection point 81 of the printed circuit board 80 by soldering. Thereafter, a plurality of circuit components arranged on the printed circuit board 80 are molded with urethane foam to protect the circuit components from moisture, and a protective cover 90 is formed on the printed circuit board 80 So that the fan motor of the present invention can be assembled through the process of protecting the circuit components disposed on the printed circuit board 80 from the external impact. The upper and lower cases 10 and 70 may be sealed by ultrasonically sealing the power line feed guide 73 with a sealing member (not shown) The respective partition fingers 11 and the fitting recesses 71 are ultrasonically fused to each other so that the partition guide pieces 74 of the power line feed guide 73 are sealed in a state where the power line 100 is fitted The entire motor can cut off moisture from the outside.

As described above, according to the present invention, the printed circuit board 80 is disposed inside the upper and lower cases 70 and 10 to be bonded by ultrasonic welding, thereby protecting the control circuit disposed on the printed circuit board 80 from external moisture infiltration. Since the printed circuit board is disposed inside the upper and lower cases 70 and 10, a separate bracket for disposing the printed circuit board is not required. Therefore, the number of assembled parts constituting the motor is reduced, And at the same time, the original activity of the manufacturing process is promoted by rapid assembly. In addition, since the present invention is constituted by integrally protruding and forming the fixing flange portion 72 on both sides of the upper case 70 without the separate brackets in addition to the upper and lower cases 70, 10, the weight and size of the whole motor can be reduced, A motor can be provided, which is advantageous in providing convenience for installation in a device such as a refrigerator and securing an installation space, and a power supply line 100 for supplying power to the printed circuit board 80 can be mounted without being flowed or twisted Thereby improving the stability of the motor configuration.

For reference, reference numerals such as felt, upper and lower bearings, oil return washer, and the like, which are other booms for driving a motor, are omitted from the drawings shown in the description of the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that various variations and applications are possible. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

10: Lower case 11:
20: rotor 21: bearing
30: rotating shaft 40: stator
50, 60: upper and lower insulators 70: upper case
71: insertion fitting portion 72: fixing flange portion
72 ': Coupling hole 73: Power supply line guide
74: compartment guide 80: printed circuit board
90: Protective lid 100: Power line
110: anti-flow fittings 110 ': engaging recesses
110 ": Loop groove

Claims (5)

A rotary shaft 30 fitted to the center of the rotor 20 installed at the center of the lower case 10 by a bearing 21; A stator 40 radially disposed around the outer periphery of the rotor 30; Upper and lower insulators 50 and 60 sandwiched between the upper and lower portions of the stator 40; And an upper case (70) coupled to the lower case,
A printed circuit board (80) coupled with a fixing member (51) disposed around the upper insulator (50);
A protective lid 90 covering the upper portion of the printed circuit board 80 is disposed inside the lower case 10 and the upper case 70,
A fitting boss 11 is formed on the outer side of the lower case 10 so that the fitting boss 11 of the lower case 10 and the fitting recessed portion 71 of the upper case 70 are engaged, (110) is formed on the outer periphery of the power source line (50)
The flow preventive insertion hole 110 is formed with an engaging recess 110 'for inserting the electric power source line 100 and is formed outside the engaging recessed portion 110' So that an elastic force is applied to the inside and outside of the engaging recessed portion 110 '. The fan motor according to claim 1, wherein a fixing flange portion (72) formed with engagement holes (72 ') on both sides of the upper case (70) is formed integrally with the upper case. delete delete The coil guide (52) according to claim 1, further comprising a plurality of coil guides (52) formed on an outer periphery of the upper insulator, wherein a height of the power line immersion fittings (110) Wherein the fan motor is formed with a fan motor.
KR1020150110126A 2015-08-04 2015-08-04 Fan motor KR101725092B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150110126A KR101725092B1 (en) 2015-08-04 2015-08-04 Fan motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150110126A KR101725092B1 (en) 2015-08-04 2015-08-04 Fan motor

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Publication Number Publication Date
KR20170016692A KR20170016692A (en) 2017-02-14
KR101725092B1 true KR101725092B1 (en) 2017-05-10

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020005461A (en) * 2018-06-29 2020-01-09 日本電産株式会社 motor
JP2020005460A (en) * 2018-06-29 2020-01-09 日本電産株式会社 motor
KR102588323B1 (en) * 2021-08-31 2023-10-12 자화전자(주) Vibration motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000041371A (en) * 1998-07-21 2000-02-08 Aichi Electric Co Ltd Brushless motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000041371A (en) * 1998-07-21 2000-02-08 Aichi Electric Co Ltd Brushless motor

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