KR100678423B1 - Coil fixing structure of electric clutch - Google Patents

Coil fixing structure of electric clutch Download PDF

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KR100678423B1
KR100678423B1 KR1020000065746A KR20000065746A KR100678423B1 KR 100678423 B1 KR100678423 B1 KR 100678423B1 KR 1020000065746 A KR1020000065746 A KR 1020000065746A KR 20000065746 A KR20000065746 A KR 20000065746A KR 100678423 B1 KR100678423 B1 KR 100678423B1
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South Korea
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coil
electromagnetic
electronic
housing
lead wire
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KR1020000065746A
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Korean (ko)
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KR20020035933A (en
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홍선주
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한라공조주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/14—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
    • F16D27/108—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
    • F16D27/112—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D2027/001—Means for electric connection of the coils of the electromagnetic clutches

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Abstract

본 발명은 코일의 형상을 유지하는 절연부재를 코일의 단면형상에 따라 절첩선이 형성되도록 하고, 리드와이어의 수납부가 구비됨과 아울러 원통조각으로 이루어진 보빈부재로 코일을 고정하도록 한 전자클러치의 코일 고정구조에 관한 것으로, 통전에 의해 전자흡인력이 발생되고, 단부에 리드와이어(11)가 구비된 전자코일(10); 상기 리드와이어(11)의 수납부(31)가 구비되고, 상기 전자코일(10)의 내주면과 저면에 접촉되는 원통조각으로 이루어진 보빈부재(30); 상기 전자코일(10)이 안착되는 코일하우징(40)으로 구성되며, 상기 전자코일(10)을 상기 코일하우징(40)에 삽입시킨 후 수지부재(50)를 주입 성형하여 상기 전자코일(10)과 상기 코일하우징(40)을 절연하는 전자클러치의 코일 고정구조에 있어서, 상기 전자코일(10)의 단면형상에 따라 절첩선(21)이 형성되어 상기 전자코일(10)의 형상을 유지하도록 고정하는 절연부재(20)를 더 구비한 것이다.According to the present invention, a folding line is formed according to the cross-sectional shape of the coil, and an insulation member for maintaining the shape of the coil is provided. It relates to a structure, the electromagnetic attraction force is generated by the energization, the electronic coil 10 having a lead wire 11 at the end; A bobbin member 30 having a receiving portion 31 of the lead wire 11 and formed of a cylindrical piece in contact with an inner circumferential surface and a bottom surface of the electromagnetic coil 10; It consists of a coil housing 40 to which the electromagnetic coil 10 is seated, and inserts the electronic coil 10 into the coil housing 40, and then injection molding the resin member 50 to the electronic coil 10 In the coil fixing structure of the electromagnetic clutch that insulates the coil housing 40, a fold line 21 is formed according to the cross-sectional shape of the electromagnetic coil 10 to fix the electromagnetic coil 10 to maintain the shape. It is further provided with an insulating member 20.

전자코일, 절연부재, 보빈부재, 코일하우징Electronic coil, insulation member, bobbin member, coil housing

Description

전자클러치의 코일 고정구조{COIL FIXING STRUCTURE OF ELECTRIC CLUTCH}Coil fixing structure of electromagnetic clutch {COIL FIXING STRUCTURE OF ELECTRIC CLUTCH}

도 1은 종래의 전자클러치의 구성을 나타낸 단면도.1 is a cross-sectional view showing the configuration of a conventional electronic clutch.

도 2는 종래 전자클러치의 코일 고정구조의 일실시예를 나타낸 분해사시도.Figure 2 is an exploded perspective view showing an embodiment of a coil fixing structure of a conventional electronic clutch.

도 3은 본 발명의 전자클러치의 코일 고정구조를 나타낸 분해사시도.Figure 3 is an exploded perspective view showing a coil fixing structure of the electromagnetic clutch of the present invention.

도 4는 도 3의 결합된 상태의 요부 단면도.4 is a cross-sectional view of the main parts of the combined state of FIG.

도 5는 본 발명의 보빈부재가 전자코일에 설치된 상태를 나타낸 도면.5 is a view showing a state in which the bobbin member of the present invention is installed on the electromagnetic coil.

도 6은 본 발명의 절연부재를 나타낸 평면도.6 is a plan view showing an insulating member of the present invention.

(도면중 주요 부분에 대한 부호의 설명)(Explanation of symbols for the main parts of the drawing)

10: 전자코일 11: 리드와이어10: Electronic coil 11: lead wire

20: 절연부재 21: 절첩선20: insulation member 21: fold line

30: 보빈부재 31: 수납부30: bobbin member 31: housing

40: 코일하우징 41: 내주측원통부40: coil housing 41: inner cylinder portion

42: 외주측원통부 43: 안착부42: outer circumferential cylindrical portion 43: seating portion

50: 수지부재


50: resin member


본 발명은 전자클러치의 코일 고정구조에 관한 것으로, 더욱 상세하게는 코일의 형상을 유지하는 절연부재를 코일의 단면형상에 따라 절첩선이 형성되도록 하고, 리드와이어의 수납부가 구비됨과 아울러 원통조각으로 이루어진 보빈부재로 코일을 고정하도록 한 전자클러치의 코일 고정구조에 관한 것이다.The present invention relates to a coil fixing structure of an electromagnetic clutch, and more particularly, a folding line is formed according to the cross-sectional shape of the coil of the insulating member which maintains the shape of the coil, and the receiving portion of the lead wire is provided as well as the cylindrical piece. It relates to a coil fixing structure of the electromagnetic clutch to fix the coil with a bobbin member made.

일반적으로 차량용 냉방 시스템에는 냉매를 고온 고압의 상태로 만드는 압축기를 엔진의 크랭크 풀리로부터 V-벨트로 연결하여 구동시키게 되는데 냉방이 필요할 때만 압축기를 구동하기 위해 전자클러치가 설치되어 있다.In general, a vehicle cooling system is driven by a V-belt from the engine's crank pulley to drive the compressor to bring the refrigerant at a high temperature and high pressure. An electronic clutch is installed to drive the compressor only when cooling is required.

이와 같은 전자클러치는 도 1에서 보는 바와 같이 전자흡인력을 발생시키는 전자코일(1)이 내장되고, 압축기(도면상 미도시)에 고정되는 코일하우징(2)과, 상기 코일하우징(2)이 안착되고, 엔진에서 회전력을 받아 회전되는 구동풀리(3)가 고정되어 있으며, 내주부에는 베어링(4)이 설치된 구동로터(5)와, 상기 전자코일(1)의 전자흡인력에 의해 구동로터(5)에 흡인되는 아마츄어(armature) (6)가 구비된 허브(7)로 구성되어 엔진의 구동력을 단속하여 압축기를 온ㆍ오프하는 것이다.As shown in FIG. 1, the electromagnetic clutch includes a coil housing 2 having a built-in electromagnetic coil 1 for generating an electromagnetic suction force, which is fixed to a compressor (not shown), and the coil housing 2 mounted thereon. And a driving pulley 3 which is rotated by receiving rotational force from the engine, and a driving rotor 5 having a bearing 4 installed therein, and a driving rotor 5 by an electromagnetic suction force of the electromagnetic coil 1. It consists of a hub (7) provided with an armature (6) which is attracted to) to interrupt the driving force of the engine to turn the compressor on and off.

이와 같은 전자클러치는 전류가 통전되면 자기장을 형성시키는 전자코일(1)과 코일하우징(2) 사이를 절연하면서 고정하는 것이 중요한 문제였다.Such an electromagnetic clutch was an important problem to insulate and fix the electromagnetic coil 1 and the coil housing 2 which form a magnetic field when an electric current is applied.

상기와 같은 전자클러치의 코일 고정구조에 대한 종래의 일례로서는, 일본국 특개평11-082552호의 전자클러치에서 찾아 볼 수 있다. As a conventional example of the coil fixing structure of the above-described electromagnetic clutch, it can be found in the electromagnetic clutch of Japanese Patent Laid-Open No. 11-082552.                         

이는 전자코일을 코일하우징 안에 저비용으로 양호하게 절연 고정할 수 있는 전자클러치를 제공하는 것으로서, 도 2을 참조하여 살펴보면 다음과 같다.This provides an electronic clutch that can insulate and secure the electronic coil in a coil housing at low cost. Referring to FIG.

변형이 용이한 전기 절연재료로 된 절연부재(8)를 코일하우징(2) 내벽면에 따라 형태를 변형시키고, 상기 코일하우징(2) 안에 전자코일(1)을 안착시킨 후 상기 전자코일(1)의 표면과 상기 코일하우징(2)의 내벽면과의 소정의 간극을 지지한 상태에서 상기 전자코일(1)의 표면과 상기 코일하우징(2)의 내벽면과의 사이에 수지부재를 주입하고 성형한 것이다.The insulating member 8 made of an electrically insulating material which is easily deformed is deformed according to the inner wall surface of the coil housing 2, and the electromagnetic coil 1 is seated in the coil housing 2, and then the electromagnetic coil 1 And a resin member is injected between the surface of the electromagnetic coil 1 and the inner wall surface of the coil housing 2 while supporting a predetermined gap between the surface of the coil housing 2 and the inner wall surface of the coil housing 2. It is molded.

상기의 일본국 공개특허는 전자코일(1)의 원주 방향 여러부분에 부분적으로 휘감았던, 많은 시간과 인력을 필요로 하는 면테이프를 감는 공정을 제거하였다. The Japanese Laid-Open Patent Application eliminates a process of winding a cotton tape, which requires a lot of time and manpower, which is partially wound around various parts of the circumferential direction of the electronic coil 1.

그러나, 상기의 일본국 특허는 전자코일(1)를 셀프본딩(selfbonding) 코일을 사용하여 형상을 유지한 상태에서 절연부재(8)를 코일하우징의 내벽면의 형태에 따라 변형시키고, 전자코일(1)을 코일하우징(2)에 고정시킴으로서, 원가가 상승되는 문제점이 있었다.However, the Japanese patent described above deforms the insulating member 8 according to the shape of the inner wall of the coil housing while keeping the shape of the electromagnetic coil 1 using a self-bonding coil. By fixing 1) to the coil housing 2, there was a problem that the cost is increased.

또한, 전자코일(1) 단부의 리드와이어를 코일하우징(2)과 절연하면서 전원 등과 연결하는 문제점은 여전히 해결하지 못하였다.In addition, the problem of connecting the lead wire at the end of the electronic coil 1 to the power supply and the like while insulated from the coil housing 2 has not been solved.

또한, 전원과 연결을 위한 리드와이어와 전자코일(1)의 단부와의 연결부를 코일 하우징(2)과 전자코일(1)에서 절연하는 문제에 대해서는 언급되지 않고 있다.In addition, there is no mention of a problem of insulating the connection portion between the lead wire for connecting the power supply and the end of the electronic coil 1 from the coil housing 2 and the electronic coil 1.

본 발명은 이러한 종래의 문제점을 해결하기 위하여 이루어진 것으로, 그 목적은 전자코일의 단면형상에 따라 절첩선이 형성된 절연부재와 리드와이어의 수납 부를 갖는 원통 조각형상의 보빈부재로 전자코일의 형상 유지를 쉽게 할 수 있을 뿐만 아니라 전자코일과 코일하우징 사이의 절연을 용이하게 하도록 하는 전자클러치의 코일 고정구조를 제공함에 있다.SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and its object is to maintain the shape of the electromagnetic coil with a cylindrical piece bobbin member having an insulation member and a lead wire receiving portion formed with a fold line according to the cross-sectional shape of the electronic coil. The present invention provides a coil fixing structure of an electronic clutch that is not only easy but also facilitates insulation between the electronic coil and the coil housing.

이러한 목적을 해결하기 위한 본 발명은 통전에 의해 전자흡인력이 발생되고, 단부에 리드와이어가 구비된 전자코일; 상기 리드와이어의 수납부가 구비되고, 상기 전자코일의 내주면과 저면에 접촉되는 원통조각으로 이루어진 보빈부재; 상기 전자코일이 안착되는 코일하우징으로 구성되며, 상기 전자코일을 상기 코일하우징에 삽입시킨 후 수지부재를 주입 성형하여 상기 전자코일과 상기 코일하우징을 절연하는 전자클러치의 코일 고정구조에 있어서, 상기 전자코일의 단면형상에 따라 절첩선이 형성되어 상기 전자코일의 형상을 유지하도록 고정하는 절연부재를 더 구비한 것이다.The present invention for solving the above object is generated an electron attraction force by energization, the electronic coil having a lead wire at the end; A bobbin member provided with an accommodating part of the lead wire, the bobbin member having a cylindrical piece in contact with an inner circumferential surface and a bottom surface of the electromagnetic coil; In the coil fixing structure of the electromagnetic clutch which is composed of a coil housing in which the electromagnetic coil is seated, and inserting the electronic coil into the coil housing and injecting and molding a resin member to insulate the electronic coil and the coil housing. A fold line is formed according to the cross-sectional shape of the coil, and further includes an insulating member fixed to maintain the shape of the electromagnetic coil.

이하, 본 발명의 바람직한 실시예를 도면을 통해 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명의 주요부분의 분해사시도로서, 전자코일(10)과, 상기 전자코일(10)의 형상을 유지시키는 절연부재(20) 및 보빈부재(30)와, 상기 전자코일(10)이 안착되는 코일하우징(40)으로 크게 구성되어져 있다.3 is an exploded perspective view of the main portion of the present invention, the electromagnetic coil 10, the insulating member 20 and the bobbin member 30 to maintain the shape of the electronic coil 10, and the electromagnetic coil 10 The coil housing 40 to be seated is largely configured.

전자코일(10)은 통전에 의해 전자흡인력이 발생되는 것으로서, 일반코일을 권선하여 이루어지고, 단부에는 전원 등과 연결하기 위해 리드와이어(11)가 구비되어져 있다.As the electromagnetic coil 10 generates an electromagnetic attraction force by energization, the electromagnetic coil 10 is formed by winding a general coil, and an end wire 11 is provided at the end to be connected to a power source.

이때 전자코일(10)은 셀프본딩 코일을 사용하지 않고 일반코일을 사용하여 원가절감을 이룰수 있다. In this case, the electronic coil 10 may achieve cost reduction using a general coil without using a self-bonding coil.                     

절연부재(20)는 전자코일(10)의 단면형상에 따라 절첩선(21)이 형성되어져 있어 전자코일(20)을 고정하여 형상을 유지함과 동시에 단면을 감싸면서 양단부는 접착 등의 방법으로 결합하게 된다.Insulating member 20 has a fold line 21 is formed according to the cross-sectional shape of the electromagnetic coil 10, the electronic coil 20 is fixed to maintain the shape and at the same time wrap the cross-section while both ends are bonded by bonding or the like method Done.

즉, 셀프본딩되지 않은 전자코일의 형상을 유지하도록 전자코일(10)의 반경 방향으로 일정간격으로 배치시켜 고정하는 것이다.That is, to maintain the shape of the electronic coil that is not self-bonding, it is arranged and fixed at regular intervals in the radial direction of the electronic coil 10.

보빈부재(30)는 전자코일(10)의 내주면과 저면에 접촉되어 있고, 상면에는 전자코일의 단부에서 연장된 리드와이어(11)의 수납부(31)가 형성되어 있다.The bobbin member 30 is in contact with the inner circumferential surface and the bottom surface of the electromagnetic coil 10, and the receiving portion 31 of the lead wire 11 extending from the end of the electromagnetic coil is formed on the upper surface.

코일하우징(40)은 내주측원통부(41)와 외주측원통부(42)로 이루어진 이중 원통형상으로 구성되어져 있고 이들 사이에 전자코일(10)이 삽입 안착되는 안착부(43)가 형성되어 있어 절연부재(20)와 보빈부재(30)가 결합된 전자코일(10)을 삽입시킨 후 수지부재(50)를 주입 성형하여 코일하우징(40)과 전자코일(10) 사이의 절연이 이루어지는 것이다.The coil housing 40 has a double cylindrical shape consisting of an inner circumferential side cylindrical portion 41 and an outer circumferential side cylindrical portion 42, and a seating portion 43 into which the electronic coil 10 is inserted and seated is formed therebetween. Thereafter, the insulating member 20 and the bobbin member 30 are inserted, and then the resin member 50 is injected and molded to insulate the coil housing 40 from the electromagnetic coil 10. .

계속해서 본 발명에 따른 작용을 상세히 설명하면 다음과 같다.Next, the operation according to the present invention will be described in detail.

일반코일을 원통형상으로 감아 전자코일(10)을 만든 후 전자코일(10)의 단면형상에 따라 절첩선(21)이 형성된 절연부재(20)로 전자코일(10)을 고정하여 형상유지를 한다.The coil is wound into a cylindrical shape to make the electromagnetic coil 10, and then the shape is maintained by fixing the electromagnetic coil 10 with an insulating member 20 having a fold line 21 formed therein according to the cross-sectional shape of the electromagnetic coil 10. .

그리고, 절연부재(20)로 고정된 전자코일(10)과 보빈부재(30)를 코일하우징(40)의 안착부(43)에 삽입시키고, 수지부재(50)를 안착부(43)에 주입하게 되면 전자코일(10)과 코일하우징(40)은 절연이 됨과 동시에 전자코일(10)의 리드와이어(11)는 보빈부재(30)의 리드와이어(11)의 수납부(31)를 통해 외부로 돌출되어 전원 등과 연결되는 것이다.Then, the electromagnetic coil 10 and the bobbin member 30 fixed by the insulating member 20 are inserted into the seating portion 43 of the coil housing 40, and the resin member 50 is injected into the seating portion 43. In this case, the electronic coil 10 and the coil housing 40 are insulated and at the same time, the lead wire 11 of the electronic coil 10 is externally received through the accommodating part 31 of the lead wire 11 of the bobbin member 30. Protrudes to be connected to the power.

이렇게 전자코일(10)과 코일하우징(40)을 절연하여 전자코일(10)에 전원을 인가시키게 되면 전자코일(10)에서 강한 자기장이 발생하여 일반적인 전자클러치의 기능을 수행하게 되는 것이다.When the electric coil 10 is insulated from the coil housing 40 and a power is applied to the electronic coil 10, a strong magnetic field is generated in the electronic coil 10 to perform a function of a general electronic clutch.

이상 상세히 설명한 바와 같은 본 발명의 전자클러치의 코일 고정구조는 일반코일을 원통형상으로 권선하여 절첩선이 형성된 절연부재로 고정함으로서, 원가가 절감되는 효과가 있다.The coil fixing structure of the electronic clutch of the present invention as described above in detail has the effect of reducing the cost by winding the general coil in a cylindrical shape and fixing it with an insulating member having a fold line.

또한, 전자코일의 리드와이어를 수납하는 보빈부재를 원통조각으로 성형하여 설치함으로서, 안정적으로 리드와이어를 수납할 수 있어 전자코일을 보호하는 효과 등을 이룰 수 있다.In addition, by forming the bobbin member for accommodating the lead wire of the electronic coil into a cylindrical piece, the lead wire can be stably stored, thereby achieving an effect of protecting the electronic coil.

Claims (1)

통전에 의해 전자흡인력이 발생되고, 단부에 리드와이어(11)가 구비된 전자코일(10); 상기 리드와이어(11)의 수납부(31)가 구비되고, 상기 전자코일(10)의 내주면과 저면에 접촉되는 원통조각으로 이루어진 보빈부재(30); 상기 전자코일(10)이 안착되는 코일하우징(40)으로 구성되며, 상기 전자코일(10)을 상기 코일하우징(40)에 삽입시킨 후 수지부재(50)를 주입 성형하여 상기 전자코일(10)과 상기 코일하우징(40)을 절연하는 전자클러치의 코일 고정구조에 있어서,An electromagnetic coil 10 generated by energization and having a lead wire 11 at an end thereof; A bobbin member 30 having a receiving portion 31 of the lead wire 11 and formed of a cylindrical piece in contact with an inner circumferential surface and a bottom surface of the electromagnetic coil 10; It consists of a coil housing 40 to which the electromagnetic coil 10 is seated, and inserts the electronic coil 10 into the coil housing 40, and then injection molding the resin member 50 to the electronic coil 10 In the coil fixing structure of the electromagnetic clutch to insulate the coil housing 40, 상기 전자코일(10)의 단면형상에 따라 절첩선(21)이 형성되어 상기 전자코일(10)의 형상을 유지하도록 고정하는 절연부재(20)를 더 구비한 것을 특징으로 하는 전자클러치의 코일 고정구조.Fixing the coil of the electromagnetic clutch, characterized in that the fold line 21 is formed in accordance with the cross-sectional shape of the electromagnetic coil 10 is further provided with an insulating member 20 for fixing to maintain the shape of the electromagnetic coil 10. rescue.
KR1020000065746A 2000-11-07 2000-11-07 Coil fixing structure of electric clutch KR100678423B1 (en)

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KR101682299B1 (en) 2015-05-13 2016-12-02 주식회사 신라공업 Vehicle actuated clutches and differential devices assy
CN106531394B (en) * 2016-12-17 2018-06-29 慈溪市凯澳塑料制品有限公司 Electromagnetic coil, coil insulation framework and the modified nylon materials for preparing the skeleton
KR102191308B1 (en) * 2020-07-21 2020-12-15 김종철 Electromagnetic brake manufacturing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5166655U (en) * 1974-11-20 1976-05-26
JPS57186637A (en) * 1981-05-12 1982-11-17 Matsushita Electric Ind Co Ltd Electro-magnet of electro-magnetic clutch
JPH07190094A (en) * 1993-12-27 1995-07-28 Nippondenso Co Ltd Connector integrated type stator for electromagnetic clutch
KR19990029953U (en) * 1997-12-29 1999-07-26 신영주 Field core of electronic clutch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5166655U (en) * 1974-11-20 1976-05-26
JPS57186637A (en) * 1981-05-12 1982-11-17 Matsushita Electric Ind Co Ltd Electro-magnet of electro-magnetic clutch
JPH07190094A (en) * 1993-12-27 1995-07-28 Nippondenso Co Ltd Connector integrated type stator for electromagnetic clutch
KR19990029953U (en) * 1997-12-29 1999-07-26 신영주 Field core of electronic clutch

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