KR950003785Y1 - Stator fixing structure of motor for electric machinery - Google Patents

Stator fixing structure of motor for electric machinery

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Publication number
KR950003785Y1
KR950003785Y1 KR92016046U KR920016046U KR950003785Y1 KR 950003785 Y1 KR950003785 Y1 KR 950003785Y1 KR 92016046 U KR92016046 U KR 92016046U KR 920016046 U KR920016046 U KR 920016046U KR 950003785 Y1 KR950003785 Y1 KR 950003785Y1
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KR
South Korea
Prior art keywords
motor
stator
housing
bearing
rotor
Prior art date
Application number
KR92016046U
Other languages
Korean (ko)
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KR940006547U (en
Inventor
권석찬
Original Assignee
박희석
계양전기 주식회사
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Application filed by 박희석, 계양전기 주식회사 filed Critical 박희석
Priority to KR92016046U priority Critical patent/KR950003785Y1/en
Publication of KR940006547U publication Critical patent/KR940006547U/en
Application granted granted Critical
Publication of KR950003785Y1 publication Critical patent/KR950003785Y1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Abstract

내용 없음.No content.

Description

전동공구용 모우터의 고정자 안착구조Stator seating structure of motor for power tool

본 고안은 전동공구용 모우터의 고정자 안착구조에 관한 것으로, 특히 냉각효과가 우수하면서 분진의 침입을 효과적으로 막아 모우터의 수명 및 하우징 내부의 베어링수명을 연장시킬 수 있도록 된 전동공구용 모우터의 고정자 안착구조에 관한 것이다.The present invention relates to a stator seating structure of a motor for a power tool. In particular, the motor has a cooling effect and effectively prevents dust intrusion, thereby extending the life of the motor and bearing life inside the housing. It relates to a stator seating structure.

현재 전동공구에 쓰이는 모우터는 자체에서 발생하는 열을 냉각시키기 위한 구조로서 완전개방형과 밀봉형의 구조가 채용되고 있는바, 그중 제2도에 도시된 것과 같은 개방형을 채용하고 있는 직접 냉각방식에서는, 일체로 형성된 하우징(31)의 양쪽벽(32, 33)에 각각 설치된 베어링(35, 35′)을 매개로 중간에 회전자(36)가 고정설치된 회전축(34)이 장착되는 한편, 하우징(31)의 내벽(31a)에는 코일(38)이 감겨진 고정자(37)가 지지부재를 매개로 일정간격을 두고 장착되고, 상기 회전축(34)의 한쪽끝은 전동공구로 동력을 전달하기 위한 동력 인출축(34a)이 연장형성됨과 더불어 이 회전축(34)의 회전자(36)앞쪽인 동력인출축(34a) 쪽에는 냉각팬(39)이 고정설치되어, 모우터가 가동중에 발생하는 열이 상기 냉각팬(39)의 회전으로 하우징(31)의 뒷쪽벽체(32)에 형성된 공기유입구(32d)로 들어와 하우징(31)의 내벽(31a)과 고정자(37) 사이의 간극(40) 및 고정자(37)와 회전자(36) 사이의 간극(41)을 지나 하우징(31)의 앞쪽측벽(33)에 형성된 공기배출구(33d)를 통해 흐르는 공기에 의해 냉각되도록 구성되어 있다.Motors currently used in power tools have a fully open and sealed structure for cooling the heat generated by themselves, and in the direct cooling method employing an open type as shown in FIG. Rotating shafts 34, on which rotors 36 are fixed, are mounted in the middle of bearings 35 and 35 'respectively installed on both walls 32 and 33 of integrally formed housing 31, while housing 31 is mounted. In the inner wall 31a of the coil), a stator 37 having a coil 38 wound thereon is mounted at a predetermined interval through a supporting member, and one end of the rotary shaft 34 draws power to transfer power to a power tool. The shaft 34a is extended and the cooling fan 39 is fixed to the power take-off shaft 34a, which is in front of the rotor 36 of the rotary shaft 34, so that the heat generated while the motor is operating is Air formed in the rear wall 32 of the housing 31 by the rotation of the cooling fan 39 Of the housing 31 through the inlet 32d and past the gap 40 between the inner wall 31a of the housing 31 and the stator 37 and the gap 41 between the stator 37 and the rotor 36. It is comprised so that it may be cooled by the air which flows through the air discharge port 33d formed in the front side wall 33. As shown in FIG.

따라서 코일(38)이 감겨진 고정자(37)과 하우징(31) 및 고정자(37)와 회전자(36)의 틈(40, 41)사이로 냉각팬(39)에 의해 공기가 관통해서 흘러 모우터에서 발생하는 열이 쉽게 냉각될 수 있기는 하나, 작업중 발생하는 분진이 공기와 함께 모우터속으로 들어와 특히 회전축 뒷쪽을 지지하는 뒷쪽베어링(35)이 쉽게 마모되게 됨으로써 모우터의 수명이 짧아지게 되는 결점이 있게 된다.Therefore, air flows through the cooling fan 39 between the stator 37 and the housing 31 and the gaps 40 and 41 of the stator 37 and the rotor 36 on which the coil 38 is wound. Although the heat generated in the can easily be cooled, dust generated during operation enters the motor together with the air, and in particular, the rear bearing 35, which supports the rear of the rotating shaft, is easily worn, which shortens the life of the motor. This will be.

한편, 제3도에 도시된 것과 같은 밀폐형을 채용한 냉각방식에서는, 한쪽이 터진 원통형상의 하우징(51)내에 별도의 내부하우징(52)이 설치되면서, 이 내부하우징(52)내에 코일(53)을 갖춘 고정자(54)와 회전자(55)가 설치됨과 더불어, 냉각팬(56)이 상기 내부하우징(52) 외부에 공기유입구(51d)쪽 회전툭(54)끝에 고정설치된 구조로 되어 있다.On the other hand, in the cooling method employing the hermetic type as shown in FIG. 3, while the separate inner housing 52 is installed in the cylindrical housing 51 with one side, the coil 53 in the inner housing 52 is provided. The stator 54 and the rotor 55 provided with the cooling fan 56 have a structure in which the cooling fan 56 is fixed to the end of the rotary tucks 54 side toward the air inlet 51d outside the inner housing 52.

따라서 상기 내부하우징(52)의 설치로 뒷쪽베어링(58)내로 분진이 침입하는 것을 완벽하게 방지할 수는 있지만, 냉각성능이 떨어질 뿐만 아니라 과부하에 매우 약하고, 특히 모우터의 중량이 증가되는 결점이 있었다.Therefore, the installation of the inner housing 52 can completely prevent the intrusion of dust into the rear bearing 58, but not only the cooling performance is poor, but also very weak to overload, especially the weight of the motor is increased there was.

이에 본 고안은 상기와 같은 결점들을 해소하기 위해 안출된 것으로, 모우터에서 발생하는 열을 쉽게 냉각시킬 수 있을 뿐만 아니라, 작업중 발생하는 분진이 공기와 함께 모우터속으로 들어가는 것이 방지되어 발생하는 분진이 공기와 함께 모우터속으로 들어가는 것이 방지되어 공기유입측 베어링의 마모가 적고, 무게도 가벼워지는 전동공구용 모우터의 고정자 안착구조를 제공함에 그 목적이 있다.The present invention has been devised to solve the above-mentioned defects, and can not only easily cool the heat generated from the motor, but also prevent the dust generated during operation from entering the motor together with the air. It is an object of the present invention to provide a stator seating structure of a motor for a power tool in which air is prevented from entering the motor together with air, so that the wear of the air inlet bearing is reduced and the weight is light.

상기와 같은 목적을 달성하기 위한 본 고안은, 하우징의 뒷쪽측벽에 설치되는 베어링설치부 외부에 이 베어링과 동축상으로 리브가 환형으로 돌출형성되어, 이 리브에 의해 이루어지는 원형홈에 코일이 감겨진 고정자의 뒷끝이 소정깊이 만큼 삽입되어 밀폐시켜짐으로써, 뒷쪽베어링에 냉각용 주입공기가 닿지 않도록 되어 있다.The present invention for achieving the above object is a stator in which a rib is protruded in an annular shape coaxially with the bearing on the outside of the bearing mounting portion installed on the rear side wall of the housing, and the coil is wound in a circular groove formed by the rib. The rear end is inserted and sealed by a predetermined depth so that the cooling injection air does not touch the rear bearing.

이하 본 고안을 첨부된 예시도면에 의거 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제1a도는 본 고안이 적용된 전동공구용 모우터를 단면도로 도시한 것으로, 원통형상의 하우징(1)에 공기유입측 뒷쪽측벽(2)만 일체로 형성되면서, 제1b도에 도시된 것과 같이 다수의 통풍구(3)가 형성되는 한편, 소정위치에 전원을 공급하는 3상전원선의 관통구멍(2a)이 형성되어 있다. 그리고 상기 뒷쪽측벽(2)에 동심원상으로 돌출형성된 2개의 고저돌출리브(2b, 2c)가 형성되어 그중 높이가 낮은 안쪽 돌출리브(2c)에는 뒷쪽베어링(4)이 고정설치되는 한편, 바깥쪽 돌출리브(2b)에는 코일(5)이 감겨진 고정자(6)의 뒷끝부위에 소정깊이로 삽입되어 뒷쪽베어링(4)쪽을 밀폐시키도록 되어 있다.FIG. 1a is a cross-sectional view of a power tool motor to which the present invention is applied, while only the air inlet side rear wall 2 is integrally formed in a cylindrical housing 1, as shown in FIG. A vent hole 3 is formed, and a through hole 2a of a three-phase power line for supplying power to a predetermined position is formed. In addition, two high protrusion ribs 2b and 2c protruding concentrically are formed on the rear side wall 2, and the rear bearing 4 is fixed to the inner protrusion rib 2c having a low height, while The protruding rib 2b is inserted into the rear end portion of the stator 6 on which the coil 5 is wound to a predetermined depth to seal the rear bearing 4 side.

한편, 상기 뒷쪽베어링(4)과 앞쪽측벽(7)에 설치된 앞쪽베어링(4′)에는 원통형의 회전자(8)가 일체로 고정된 회전축(9)이 설치되면서, 이 회전축(9)의 공기배출축 소정위치에 냉각팬(10)이 설치되어져 있다.On the other hand, the front bearing (4 ') installed in the rear bearing (4) and the front side wall (7) is provided with a rotary shaft (9) in which a cylindrical rotor (8) is integrally fixed, and the air of the rotary shaft (9) The cooling fan 10 is provided in the discharge shaft predetermined position.

한편, 상기 앞쪽측벽(7)은 안쪽면이 경사면(7e)을 가지고, 중앙부위에 앞쪽베어링(4′)이 장착되면서 주변가장자리부위에는 다수의 통풍구(7d)가 형성되어, 하우징(1)에 착탈될 수 있도록 부착되도록 되어 있다.On the other hand, the front side wall (7) has an inclined surface (7e) on the inner side, while the front bearing (4 ') is mounted on the central portion is formed a plurality of vents (7d) in the peripheral edge portion, the housing (1) It is attached to be detachable.

다음에는 상기와 같은 구성된 본 고안의 작용 및 효과에 대해 설명한다.Next, the operation and effects of the present invention configured as described above will be described.

전원이 공급되어 회전자(8)가 회전하게 되면 냉각팬(10)이 함께 회전하게 되어, 외부의 공기가 유입측인 뒷쪽측벽(21)의 통풍구(3)를 통해 들어와 고정자(6)의 외면을 스쳐 코일(5)이 감겨진 고정자(6)와 하우징(1) 내부를 냉각시키게 되는데, 이때 앞쪽측벽(7)의 통풍구(7d)를 통해 나가면서 냉각팬(10)의 앞쪽에는 와류가 형성되어 고정자(6)와 회전자(8) 사이에 열이 이들 고정자(6)와 회전자(8) 사이의 간극(11)을 통해 들어온 냉각공기에 의해 냉각되므로 우수한 냉각효과를 갖도록 된다.When power is supplied and the rotor 8 rotates, the cooling fan 10 rotates together, and external air enters through the vent hole 3 of the rear side wall 21 on the inflow side, and the outer surface of the stator 6 is rotated. When the coil 5 is wound around to cool the inside of the stator 6 and the housing 1, the vortex is formed in front of the cooling fan 10 while exiting through the vent 7d of the front side wall 7. The heat between the stator 6 and the rotor 8 is cooled by the cooling air that enters through the gap 11 between the stator 6 and the rotor 8 so that it has an excellent cooling effect.

한편, 통풍구(3)를 통해 공기와 함께 들어온 분진은 냉각팬(10)에 의해 앞쪽측벽(7)의 경사면(7e)를 따라 통풍구(7d)로 나가게 된다.On the other hand, the dust introduced with the air through the ventilation hole (3) exits the ventilation hole (7d) along the inclined surface (7e) of the front side wall (7) by the cooling fan (10).

따라서 고정자(6)의 외부는 관통공기에 의해 효과적으로 냉각되는 한편 회전자(8) 및 뒷쪽베어링(4) 부위는 냉각팬(10)주위에서 일어나는 와류에 의해 고정자(6)와 회전자(8) 사이의 간극을 통해 냉각되게 됨으로써 냉각공기가 직접 뒷쪽베어링(4)쪽으로 유입되지 않게 됨으로써 분진이 들어가지 않게 되어, 뒷쪽베어링(4)의 마모로 인한 모우터의 수명단축을 방지할 수 있게 된다.Therefore, the outside of the stator 6 is effectively cooled by the through air, while the rotor 8 and the rear bearing 4 portions are stator 6 and the rotor 8 by vortices occurring around the cooling fan 10. By being cooled through the gap between the cooling air is not directly introduced to the rear bearing (4) is not introduced dust, it is possible to prevent the shortening of the life of the motor due to the wear of the rear bearing (4).

이상 설명한 바와같이 본 고안에 의하면, 모우터에서 발생하는 열을 쉽게 냉각시킬 수 있으면서 작업중에 발생하는 분진이 공기와 함께 모우터속으로 들어가더라도 공기유입측 베어링이 분진에 의한 마모가 적어 수명이 길어지는 효과가 있다.As described above, according to the present invention, the heat generated from the motor can be easily cooled, and even if dust generated during operation enters the motor together with air, the air inlet bearing has less wear due to dust, resulting in longer life. It works.

제1도는 본 고안 고정자 안착구조를 채택한 전동공구용 모우터의 단면도.1 is a cross-sectional view of a motor for a power tool employing the stator mounting structure of the present invention.

제2도는 종래의 전동공구용 모우터의 1례 단면도.2 is a cross-sectional view of an example of a motor for a conventional power tool.

제3도는 종래 전동공구용 모우터의 다른예 단면도이다.3 is a cross-sectional view of another example of a motor for a conventional power tool.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 하우징 2 : 뒷쪽측벽1 housing 2 rear side wall

2a : 관통구멍 2b : 돌출리브2a: through hole 2b: protruding rib

2c : 돌출리브 3 : 통풍구2c: protruding rib 3: vent hole

4 : 뒷쪽베어링 4′ : 앞쪽베어링4: rear bearing 4 ′: front bearing

5 : 코일 6 : 고정자5: coil 6: stator

7 : 앞쪽측벽 7d : 통풍구7: Front side wall 7d: Vent

7e : 경사면 8 : 회전자7e: slope 8: rotor

9 : 회전축 10 : 냉각팬9: rotating shaft 10: cooling fan

11 : 간극11: gap

Claims (1)

하우징내에 고정자가 고정됨과 더불어, 공기관통구멍이 형성된 전후양쪽 측벽의 각 중심부에 동축상으로 설치된 베어링을 매개로 설치된 회전축에 상기 고정자와 일정간극을 갖도록 회전자가 설치되고, 상기 회전축에 소정위치에 냉각팬이 고정되어, 모우터의 구동에 따른 열이 냉각시켜지도록 구성된 전동공구용 모우터에 있어서, 상기 전후양쪽측벽(2, 7)중 뒷쪽 측벽(2)이 상기 하우징(1)과 일체로 이루어지면서 이 뒷쪽 측벽(2)의 중앙에 설치되는 뒷쪽베어링(4)의 주위에 이 뒷쪽베어링(4)과 동축동심원형상으로 높이가 높은 환형의 리브(2b)가 돌출형성되어 이 리브(2b)의 앞끝부위 내부에 상기 고정자(6)의 뒷끝부위가 일정깊이로 삽입되어 상호 밀폐시켜짐과 더불어, 상기 냉각팬(10)이 상기 회전자(8)의 앞쪽에 배치되는 한편, 상기 앞쪽 측벽(7)이 하우징(1)에 착탈될 수 있도록 부착되면서 이 앞쪽 측벽의 내면이 가장자리의 관통구멍(7d)을 중심으로 경사진 경사면(7e)을 갖도록 된 것을 특징으로 하는 전동공구용 모우터의 고정자안착구조.In addition to the stator being fixed in the housing, the rotor is provided to have a certain gap with the stator on a rotating shaft provided through a bearing coaxially installed at each center of the front and rear side walls having air through holes formed thereon, and cooled in a predetermined position on the rotating shaft. In a motor tool motor configured to cool a fan according to a driving of a motor, a rear sidewall 2 of the front and rear side walls 2 and 7 is integrally formed with the housing 1. In the circumference of the rear bearing 4, which is installed at the center of the rear side wall 2, an annular rib 2b having a high height coaxially with the rear bearing 4 is formed to protrude to form the rib 2b. The rear end portion of the stator 6 is inserted into the front end portion at a predetermined depth to seal each other, and the cooling fan 10 is disposed in front of the rotor 8, while the front side wall 7 ) Howe (1) As the attachment so as to be removably mounted stator structure of the power tool for Motor characterized in that the inner surface of the front wall so as to have an inclined slope (7e) with a central through hole (7d) of the edge.
KR92016046U 1992-08-26 1992-08-26 Stator fixing structure of motor for electric machinery KR950003785Y1 (en)

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KR950003785Y1 true KR950003785Y1 (en) 1995-05-15

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KR102494359B1 (en) * 2020-11-23 2023-02-07 한국철도기술연구원 Cooling structure for driver built-in motor

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