KR200410759Y1 - The coupling of a driving gear for a non-contact - Google Patents

The coupling of a driving gear for a non-contact Download PDF

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Publication number
KR200410759Y1
KR200410759Y1 KR2020050036715U KR20050036715U KR200410759Y1 KR 200410759 Y1 KR200410759 Y1 KR 200410759Y1 KR 2020050036715 U KR2020050036715 U KR 2020050036715U KR 20050036715 U KR20050036715 U KR 20050036715U KR 200410759 Y1 KR200410759 Y1 KR 200410759Y1
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South Korea
Prior art keywords
coupling
magnet
shaft
fastening
rotating
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KR2020050036715U
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Korean (ko)
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김홍곤
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주식회사 명신메카텍
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
    • H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/065—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using screw-thread elements
    • 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
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/83—Use of a magnetic material

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Abstract

본 고안은 크린룸 반송 시스템에서의 비 접촉식 구동장치용 커플링에 관한 것으로, 특히 구동 마그네트와 회전 마그네트를 구동축과 회전축에 각각 체결 고정시키는 커플링을 조임방식으로 변경 함으로써, 체결 고정력을 증대시키는 동시에 체결과정에서 구동축과 회전축에 손상이 가지 않을 뿐 아니라 장기간 사용시에도 커플링의 풀림 현상이 방지될 수 있도록 한 것이다.The present invention relates to a coupling for a non-contact drive system in a clean room conveying system, and in particular, by changing the coupling for fastening and fixing the driving magnet and the rotating magnet to the driving shaft and the rotating shaft in a tightening manner, In the fastening process, the drive shaft and the rotating shaft are not damaged, and the coupling phenomenon can be prevented even during long-term use.

커플링, 탄성조임링, 탄성홈, 체결부재, 체결구멍 Coupling, Elastic Fastening Ring, Elastic Groove, Fastening Member, Fastening Hole

Description

크린룸 반송 시스템에서의 비 접촉식 구동장치용 커플링{The coupling of a driving gear for a non-contact}Coupling for a non-contact drive in a cleanroom conveying system

도1은 본 고안에 따른 커플링의 설치 사용 상태를 나타낸 구성도,1 is a configuration diagram showing the installation and use of the coupling according to the present invention,

도2는 본 고안에 따른 커플링의 분리 사시도.Figure 2 is an exploded perspective view of the coupling according to the present invention.

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

10 ; 동력전달부 11 ; 벨트10; Power transmission section 11; belt

20 ; 구동축 30 ; 구동 마그네트20; Drive shaft 30; Driving magnet

40 ; 회전축 50 ; 회전 마그네트40; Axis of rotation 50; Rotating magnet

100 ; 커플링 110 ; 삽입부100; Coupling 110; Insert

120 ; 탄성조임링 130 ; 탄성홈120; Elastic tightening ring 130; Elastic groove

140 ; 조임간격 150, 151 ; 체결구멍140; Tightening interval 150, 151; Fastening hole

160 ; 체결부재160; Fastening member

본 고안은 크린룸 반송 시스템에서의 비 접촉식 구동장치용 커플링에 관한 것으로, 특히 구동 마그네트와 회전 마그네트를 구동축과 회전축에 각각 체결 고정 시키는 커플링을 조임방식으로 변경 함으로써, 체결 고정력을 증대시키는 동시에 체결과정에서 구동축과 회전축에 손상이 가지 않을 뿐 아니라 장기간 사용시에도 커플링의 풀림 현상이 방지될 수 있도록 한 크린룸 반송 시스템에서의 비 접촉식 구동장치용 커플링에 관한 것이다.The present invention relates to a coupling for a non-contact drive system in a clean room conveying system. In particular, by changing the coupling for fastening and fixing the driving magnet and the rotating magnet to the driving shaft and the rotating shaft in a tightening manner, The present invention relates to a coupling for a non-contact drive system in a clean room conveying system that not only does not damage the drive shaft and the rotating shaft in the fastening process but also prevents the coupling from being loosened even during long-term use.

일반적인 크린룸 반송시스템은 크게 동력전달부의 벨트와 연결되어 구동되는 구동축과, 상기 구동축에 일정한 간격을 두고 배열 형성되고 구동축과 일체로 회전하는 구동 마그네트와, 상기 구동 마그네트와 일정한 간격을 두고 90°교차 형성되는 회전 마그네트와, 상기 회전 마그네트와 구동 마그네트 사이에 발생된 흡인, 반발력을 통해 회전 마그네트가 회전하면 이와 일체로 회전할 수 있도록 끝단이 연결되고 몸체에 다수 형성된 반송롤러를 이용하여 물품을 반송시키는 회전축과, 상기 회전 마그네트와 구동 마그네트를 회전축과 구동축에 각각 고정시키는 커플링으로 구성되어 있다.The general clean room conveying system is largely connected to a drive shaft driven by a belt of a power transmission unit, a drive magnet which is formed at regular intervals on the drive shaft and rotates integrally with the drive shaft, and a 90 ° cross-section formed at regular intervals with the drive magnet. Rotating magnet which is rotated through the suction magnet and the repelling force generated between the rotating magnet and the driving magnet, the rotary shaft is connected to the end so that it can be rotated integrally and conveys the goods using a plurality of conveying rollers formed on the body And a coupling for fixing the rotating magnet and the driving magnet to the rotating shaft and the driving shaft, respectively.

상기 커플링은 몸체 한쪽에 형성된 삽입부를 통하여 구동 마그네트 또는 회전마그네트가 삽입 고정되고, 이 삽입부와 이웃하는 단부에는 커플링을 구동축 또는 회전축에 체결 고정시키기 위한 체결구멍이 다수 형성되어 있으며, 상기 체결구멍에 볼트가 나사식으로 체결되는 방식을 채택 사용하고 있다.The coupling has a driving magnet or a rotating magnet is inserted and fixed through the insertion portion formed on one side of the body, and a plurality of fastening holes for fastening and fixing the coupling to the driving shaft or the rotating shaft are formed at the end adjacent to the insertion portion. The bolt is screwed into the hole.

이러한 체결구조를 갖는 종래 커플링을 이용하여 구동축 또는 회전축에 각각 고정 마그네트와 회전 마그네트를 체결 고정시킬 수 있다는 이점은 있으나, 종래 커플링은 체결구멍에 나사 결합되는 볼트가 직접 구동축 또는 회전축에 접촉되면서 커플링을 구동축 또는 회전축에 결합 고정시키는 방식이기 때문에 전체적으로 체결 력이 저하되는 단점이 있었다.There is an advantage in that the fixing magnet and the rotating magnet can be fastened and fixed to the driving shaft or the rotating shaft, respectively, by using the conventional coupling having such a fastening structure. However, in the conventional coupling, the bolts screwed into the fastening holes directly contact the driving shaft or the rotating shaft. Since the coupling is fixed to the drive shaft or the rotating shaft, there is a disadvantage in that the overall tightening force is reduced.

또한, 상기와 같은 커플링 나사 체결방식은 장기간 사용시 진동에 의해 볼트 풀림 현상이 발생할 뿐 아니라 볼트에 의해 구동축과 회전축이 파손되어 제품 수명이 단축되는 등의 제반 문제점이 발생되었다.In addition, the coupling screw fastening method as described above has a variety of problems such as bolt loosening phenomenon caused by the vibration in the long-term use, as well as the drive shaft and the rotating shaft is damaged by the bolt to shorten the product life.

따라서 본 고안의 목적은 상기와 같은 종래의 문제점을 감안하여 안출한 것으로, 구동 마그네트와 회전 마그네트를 구동축과 회전축에 각각 체결 고정시키는 커플링을 조임방식으로 변경 함으로써, 체결 고정력을 증대시키는 동시에 체결과정에서 구동축과 회전축에 손상이 가지 않을 뿐 아니라 장기간 사용시에도 커플링의 풀림 현상이 방지될 수 있도록 한 크린룸 반송 시스템에서의 비 접촉식 구동장치용 커플링을 제공하는데 있다.Therefore, the object of the present invention was devised in view of the above-mentioned problems, and by changing the coupling for fastening and fixing the driving magnet and the rotating magnet to the driving shaft and the rotating shaft, respectively, the tightening process is increased while increasing the clamping force. The present invention provides a coupling for a non-contact driving device in a clean room conveying system, in which the driving shaft and the rotating shaft are not damaged and the coupling of the coupling is prevented even after long-term use.

상기와 같은 목적을 달성하기 위한 수단으로 본 고안의 커플링은 구동 마그네트 또는 회전 마그네트가 삽입 고정되는 삽입부와 이웃하는 단부를 선택하고 선택된 단부에 조임간격을 갖으며 수직 방향으로 체결구멍이 각각 형성되는 탄성조임링과,As a means for achieving the above object, the coupling of the present invention selects an end portion adjacent to an insertion portion into which a driving magnet or a rotating magnet is fixed and has a tightening interval at the selected end, and fastening holes are formed in the vertical direction, respectively. Elastic tightening ring,

상기 탄성조임링과 삽입부 사이에 형성되고 탄성조임링의 일부분이 수축 가능케 하는 탄성홈과,An elastic groove formed between the elastic tightening ring and the insert and allowing a portion of the elastic tightening ring to shrink;

상기 커플링이 회전축 또는 구동축에 삽입되면 체결구멍에 삽입 체결되어 커플링이 회전축 또는 구동축에 조임식으로 체결 고정되게 하는 체결부재로 구성되는 것을 그 기술적 구성상의 기본 특징으로 한다.When the coupling is inserted into the rotary shaft or the drive shaft is inserted into the fastening hole is characterized in that the configuration consisting of a fastening member for fastening and fastening the coupling to the rotary shaft or the drive shaft.

이하 본 고안의 바람직한 실시예를 첨부도면을 참조하여 보다 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 고안에 따른 커플링의 설치 사용 상태를 나타낸 구성도 이고, 도2는 본 고안에 따른 커플링의 분리 사시도이다.1 is a configuration showing the installation and use of the coupling according to the present invention, Figure 2 is an exploded perspective view of the coupling according to the present invention.

본 고안의 크린룸에서의 비 접촉식 구동장치도 동력전달부(10)의 벨트(11)와 연결되어 구동되는 구동축(20)과, 상기 구동축(20)에 일정한 간격을 두고 배열 형성되고 구동축(20)과 일체로 회전하는 구동 마그네트(30)와, 상기 구동 마그네트(30)와 일정한 간격을 두고 90°교차 형성되는 회전 마그네트(50)와, 상기 회전 마그네트(50)와 구동 마그네트(30) 사이에 발생된 흡인, 반발력을 통해 회전 마그네트(50)가 회전하면 이와 일체로 회전할 수 있도록 끝단이 연결되고 몸체에 다수 형성된 반송롤러를 이용하여 물품을 반송시키는 회전축(40)과, 상기 회전 마그네트(50)와 구동 마그네트(30)를 회전축(40)과 구동축(20)에 각각 고정시키는 커플링(100)으로 이루어지며 기본적으로 작동되는 것은 종래와 같다.The non-contact driving device in the clean room of the present invention is also connected to the belt 11 of the power transmission unit 10 and driven, the drive shaft 20 is formed at regular intervals and arranged in the drive shaft 20 ) And a driving magnet 30 that rotates integrally with each other, a rotating magnet 50 formed at a 90 ° interval with the driving magnet 30 at regular intervals, and between the rotating magnet 50 and the driving magnet 30. When the rotating magnet 50 rotates through the generated suction and repulsive force, the end is connected to be rotated integrally therewith, and the rotating shaft 40 conveys the article using a plurality of conveying rollers formed on the body, and the rotating magnet 50 ) And the driving magnet 30 is composed of a coupling 100 for fixing the rotating shaft 40 and the driving shaft 20, respectively, and basically operated as in the prior art.

따라서, 이하에서는 상기와 같은 동력전달부, 벨트, 구동축, 구동 마그네트, 회전 마그네트, 회전축, 커플링의 유기적 연결관계 및 구성은 통상 사용되는 기술내용이므로 그에 대한 구체적인 설명은 생략하기로 한다.Therefore, hereinafter, the organic connection relation and configuration of the power transmission unit, the belt, the driving shaft, the driving magnet, the rotating magnet, the rotating shaft, and the coupling will be omitted.

다만, 본 고안은 더욱 효과적으로 커플링을 사용할 수 있도록 한 것으로 이는 도1과 도2에서와 같이 커플링(100)에는 탄성조임링(120), 탄성홈(130), 체결구멍(150)(151), 체결부재(160)가 기본적으로 동원된다.However, the present invention allows the coupling to be used more effectively. As shown in FIGS. 1 and 2, the coupling 100 includes an elastic tightening ring 120, an elastic groove 130, and a fastening hole 150, 151. ), The fastening member 160 is basically mobilized.

탄성조임링(120)은 구동 마그네트(30) 또는 회전 마그네트(50)가 삽입 고정되는 삽입부(110)와 이웃하는 단부에 형성된다, 이러한 탄성조임링(120)에는 일부분이 수축되면서 커플링(100)이 구동축(20)과 회전축(40)에 각각 조임 결합될 수 있는 공간 즉 조임간격(140)이 형성되고, 이 조임간격(140)이 형성된 양단부에는 수직 방향으로 체결구멍(150)(151)이 각각 형성된다.The elastic tightening ring 120 is formed at an end portion adjacent to the inserting part 110 into which the driving magnet 30 or the rotating magnet 50 is inserted and fixed. A space in which 100 may be tightened and coupled to the drive shaft 20 and the rotation shaft 40, that is, a tightening interval 140 is formed, and fastening holes 150 and 151 in a vertical direction at both ends of the tightening interval 140 are formed. ) Are formed respectively.

탄성홈(130)은 탄성조임링(120)과 삽입부(110) 사이에 형성되는데, 이 탄성홈(130)은 커플링(100) 체결 작업시 탄성조임링(120)의 일부분(탄성홈이 형성된 부분)이 수축되게 하는 역활을 수행하고, 체결부재(160)는 커플링(100)이 회전축(40) 또는 구동축(20)에 삽입되면 체결구멍(150)(151)에 삽입 체결되어 커플링(100)이 회전축(40) 또는 구동축(20)에 조임식으로 체결 고정되도록 구성된다.The elastic groove 130 is formed between the elastic tightening ring 120 and the insertion portion 110, the elastic groove 130 is a portion of the elastic tightening ring 120 (elastic groove is the coupling 100 when fastening work) Formed part) is contracted, and the fastening member 160 is inserted into and fastened to the fastening holes 150 and 151 when the coupling 100 is inserted into the rotation shaft 40 or the driving shaft 20. 100 is configured to be fastened fixedly to the rotary shaft 40 or the drive shaft 20.

이와 같이 구성된 본 고안을 사용하기 위해서는 먼저 삽입부(110), 탄성조임링(120), 탄성홈(130), 조임간격(140), 체결구멍(150)(151)이 일체로 형성된 커플링(100)과 체결부재(160)를 각각 마련한 후, 상기 커플링(100)의 삽입부(110)에 고정 마그네트(30)와 회전 마그네트(50)를 각각 삽입 고정시킨다.In order to use the present invention configured as described above, first, an insertion part 110, an elastic tightening ring 120, an elastic groove 130, a tightening interval 140, and coupling holes 150 and 151 are integrally formed with a coupling ( After the 100 and the fastening member 160 are provided, respectively, the fixing magnet 30 and the rotating magnet 50 are inserted into and fixed to the insertion part 110 of the coupling 100.

상기와 같은 상태에서 구동축(20)과 회전축(40)상에 커플링(100)을 각각 삽입 배열하고, 체결부재(160)를 체결구멍(150)(151)에 나사 결합하면 탄성조임링(120)은 탄성홈(130)에 의해 수축되면서 구동축(20)과 회전축(40)상에 각각 체결 고정되는 것이다.Inserting and coupling the coupling 100 on the drive shaft 20 and the rotating shaft 40 in the above state, and screwing the fastening member 160 to the fastening holes 150, 151 elastic tightening ring 120 ) Is contracted by the elastic groove 130 is fixed to the drive shaft 20 and the rotating shaft 40, respectively.

이상에서 살펴본 바와 같이 본 고안에 의하면, 구동 마그네트와 회전 마그네 트를 구동축과 회전축에 각각 체결 고정시키는 커플링은 탄성조임링, 탄성홈 등에 의해 조임방식으로 변경되어 있다.As described above, according to the present invention, the coupling for fastening and fixing the driving magnet and the rotating magnet to the driving shaft and the rotating shaft, respectively, has been changed to a tightening method by an elastic tightening ring, an elastic groove, or the like.

따라서 본 고안에 따른 커플링은 탄성조임링이 구동축과 회전축에 면접촉되기 때문에 체결 고정력이 종래 볼트 결합방식 보다 더욱 증대될 뿐 아니라 장기간 사용시에도 커플링의 풀림 현상이 방지될 수 것이다.Therefore, in the coupling according to the present invention, since the elastic tightening ring is in surface contact with the driving shaft and the rotating shaft, the fastening fixing force is further increased than the conventional bolt coupling method, and the loosening phenomenon of the coupling may be prevented even during long-term use.

또한, 커플링 체결과정에서 체결부재에 의해 커플링의 탄성조임링이 구동축과 회전축과 직접 접촉 결합되기 때문에 구동축과 회전축에 손상이 가지 않을 뿐 아니라 이에 따라 제품의 수명이 연장될 수 있는 등의 효과가 있는 것이다.In addition, since the elastic fastening ring of the coupling is directly contacted with the driving shaft and the rotating shaft by the fastening member in the coupling fastening process, the driving shaft and the rotating shaft are not damaged and thus the life of the product can be extended. There is.

이상에서는 본 고안을 특정의 바람직한 실시예를 참고하여 설명하였으나, 본 고안은 상기한 실시예에 한정되지 아니하며 본 고안의 요지를 벗어나지 않는 범위에서 통상의 지식을 가진자에 의해 다양한 변경과 수정이 이루어질 수 있는 것임을 밝혀둔다.In the above described the present invention with reference to a specific preferred embodiment, the present invention is not limited to the above embodiments and various changes and modifications made by those skilled in the art without departing from the spirit of the present invention Make sure you can.

Claims (1)

동력전달부(10)의 벨트(11)와 연결되어 구동되는 구동축(20)과, 상기 구동축(20)에 일정한 간격을 두고 배열 형성되고 구동축(20)과 일체로 회전하는 구동 마그네트(30)와, 상기 구동 마그네트(30)와 일정한 간격을 두고 90°교차 형성되는 회전 마그네트(50)와, 상기 회전 마그네트(50)와 구동 마그네트(30) 사이에 발생된 흡인, 반발력을 통해 회전 마그네트(50)가 회전하면 이와 일체로 회전할 수 있도록 끝단이 연결되고 몸체에 다수 형성된 반송롤러를 이용하여 물품을 반송시키는 회전축(40)과, 상기 회전 마그네트(50)와 구동 마그네트(30)를 회전축(40)과 구동축(20)에 각각 고정시키는 커플링(100)으로 이루어진 비 접촉식 구동장치용 커플링에 있어서, A drive shaft 20 which is connected to the belt 11 of the power transmission unit 10 and driven, a drive magnet 30 that is formed at regular intervals on the drive shaft 20 and integrally rotates with the drive shaft 20; The rotating magnet 50 is formed at a predetermined interval with the driving magnet 30 by 90 °, and the suction magnet and the repulsive force generated between the rotating magnet 50 and the driving magnet 30 to rotate the magnet 50. Is rotated when the end is connected to the rotating shaft 40 and the rotating shaft 40 for conveying the goods using a conveying roller formed in the body, and the rotating magnet 50 and the driving magnet 30 to the rotating shaft 40 In the coupling for a non-contact drive device consisting of and a coupling 100 for fixing to the drive shaft 20, respectively, 상기 커플링(100)은 구동 마그네트(30) 또는 회전 마그네트(50)가 삽입 고정되는 삽입부(110)와 이웃하는 단부를 선택하고 선택된 단부에 조임간격(140)을 갖으며 수직 방향으로 체결구멍(150)(151)이 각각 형성되는 탄성조임링(120)과, 상기 탄성조임링(120)과 삽입부(110) 사이에 형성되고 탄성조임링(120)의 일부분이 수축 가능케 하는 탄성홈(130)과, 상기 커플링(130)이 회전축(40) 또는 구동축(20)에 삽입되면 체결구멍(150)(151)에 삽입 체결되어 커플링(100)이 회전축(40) 또는 구동축(30)에 조임식으로 체결 고정되게 하는 체결부재(160)로 구성되는 것을 특징으로 하는 크린룸 반송 시스템에서의 비 접촉식 구동장치용 커플링.The coupling 100 selects an end portion adjacent to the insertion portion 110 into which the driving magnet 30 or the rotating magnet 50 is fixed and has a tightening interval 140 at the selected end, and fastening holes in the vertical direction. (150, 151) each of the elastic fastening ring 120 is formed, and the elastic groove formed between the elastic fastening ring 120 and the inserting portion 110 and the elastic fastening ring 120 is a part of the elastic groove ( 130 and the coupling 130 is inserted into the fastening holes 150 and 151 when the coupling 130 is inserted into the rotation shaft 40 or the driving shaft 20 so that the coupling 100 is rotated by the rotation shaft 40 or the driving shaft 30. A coupling for a non-contact drive device in a clean room conveying system, characterized in that it is composed of a fastening member (160) for fastening and fastening securely.
KR2020050036715U 2005-12-28 2005-12-28 The coupling of a driving gear for a non-contact KR200410759Y1 (en)

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