KR100241272B1 - Transmission - Google Patents
Transmission Download PDFInfo
- Publication number
- KR100241272B1 KR100241272B1 KR1019960066895A KR19960066895A KR100241272B1 KR 100241272 B1 KR100241272 B1 KR 100241272B1 KR 1019960066895 A KR1019960066895 A KR 1019960066895A KR 19960066895 A KR19960066895 A KR 19960066895A KR 100241272 B1 KR100241272 B1 KR 100241272B1
- Authority
- KR
- South Korea
- Prior art keywords
- driven pulley
- pressure
- cylinder
- continuously variable
- flange
- Prior art date
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Classifications
-
- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
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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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H2061/0037—Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Control Of Transmission Device (AREA)
Abstract
본 발명은 벨트식 무단변속기(CVT)에 관한 것으로, 종동 풀리(200)의 출력축(210)에 관로(Ps)에 연통되는 실린더(230)를 연결하고, 실린더의 양측에 피스톤(231)(232)을 구비하며, 종동 풀리에 대한 유압공급시 피스톤에 연동하여 가동 플랜지(220)를 밀어내도록 피스톤에 캠(240)(241)을 연결하여, 제어유압을 낮춰 오일 펌프의 용량감소와 라인압의 유압손실을 감소시키도록 된 것이다.The present invention relates to a belt continuously variable transmission (CVT), and connects a cylinder (230) communicating with a pipe (Ps) to an output shaft (210) of a driven pulley (200), and pistons (231, 232) on both sides of the cylinder. And a cam 240, 241 connected to the piston so as to push the movable flange 220 in conjunction with the piston when supplying hydraulic pressure to the driven pulley, thereby reducing the control oil pressure and reducing the capacity of the oil pump and the line pressure. It is to reduce the hydraulic loss.
Description
본 발명은 벨트식 무단변속기(Continuously Variable Transmission; CVT)에 관한 것으로, 특히 비교적 적은 유압으로 종동 풀리(secondary pulley)의 변속비를 제어하여 오일 펌프(oil pump)의 용량을 감소시킬 수 있으며, 라인압(line pressure)을 낮추어 유압손실을 대폭 감소시킬 수 있도록 된 벨트식 무단변속기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt continuously variable transmission (CVT), and in particular, it is possible to reduce the capacity of an oil pump by controlling the speed ratio of a secondary pulley with a relatively low hydraulic pressure, and a line pressure. The present invention relates to a belt type continuously variable transmission that is capable of significantly reducing hydraulic loss by lowering line pressure.
일반적으로 벨트식 무단변속기는 자동변속기(automatic transmission)의 일종으로서 양측 풀리(pulley)의 폭을 유압으로 조정하여 감속비를 약 0.5~2.5배 사이에서 무단계로 변화시키도록 되어 있다.In general, a belt type continuously variable transmission is a type of automatic transmission, and is configured to change the reduction ratio steplessly between about 0.5 to 2.5 times by hydraulically adjusting the widths of both pulleys.
이러한 무단변속기는 구동측인 입력축(primary shaft)(drive shaft)과 출력축(secondary shaft)에 고정 플랜지(flange)가 형성되고, 고정 플랜지에 대응하여 이동할 수 있도록 입/출력축에 가동 플랜지가 결합되어 이들 고정 플랜지와 가동 플랜지에 의해 풀리가 구성되며, 양측 풀리는 벨트(belt) 또는 체인(chain)으로 연결되어 회전동력을 전달할 수 있도록 되어 있다.Such continuously variable transmissions have fixed flanges formed on the drive shaft and the primary shaft on the driving side, and movable flanges are coupled to the input / output shaft so as to move corresponding to the fixed flanges. The pulley is composed of a fixed flange and a movable flange, and both pulleys are connected by a belt or a chain to transmit rotational power.
제1도는 일반적인 벨트식 무단변속기의 일예를 나타낸 구성도로서, 입력축(110)에 고정 플랜지(111)가 형성되고, 고정 플랜지(111)에 대향하여 축방향 이동이 가능하도록 입력축(100)에 가동 플랜지(120)가 삽입되어 구동 풀리(100)가 형성된다.1 is a configuration diagram showing an example of a general belt type continuously variable transmission, in which a fixed flange 111 is formed on the input shaft 110 and movable to the input shaft 100 to enable axial movement opposite to the fixed flange 111. The flange 120 is inserted to form the driving pulley 100.
또한 출력축(210)에 고정 플랜지(211)가 형성되고, 고정 플랜지(211)에 대향하여 축방향 이동이 가능하도록 출력축(210)에 가동 플랜지(220)가 삽입되어 종동 풀리(200)가 형성된다.In addition, the fixed flange 211 is formed on the output shaft 210, the movable flange 220 is inserted into the output shaft 210 to enable the axial movement opposite to the fixed flange 211, the driven pulley 200 is formed. .
상기 구동 풀리(100) 및 종동 풀리(200)는 상호 벨트(300)로 연결되며, 양측 풀리의 가동 플랜지(120)(220)는 유압제어장치(400)에 관로(Pp)(Ps)로 연결되어 변속비에 따른 제어압을 공급받도록 되어 있다.The driving pulley 100 and the driven pulley 200 are connected to each other by a belt 300, the movable flanges 120 and 220 of both pulleys are connected to the hydraulic control device 400 by a pipeline Pp (Ps). Thus, the control pressure according to the gear ratio is supplied.
따라서 가감속 신호에 따라 유압이 가동 플랜지(120)(220)를 상호 대향하는 축방향으로 이동시켜 구동 풀리(100)와 종동 풀리(200)의 반경을 각기 변화시킴으로써 무단변속을 행하는데, 여기서 종동 풀리(200)에는 고압의 라인압을 공급하여 전달가능한 최대의 토오크를 제어하고, 구동 풀리(100)에는 라인압을 감압시킨 비율압을 공급하여 변속비를 가변, 제어한다.Therefore, in accordance with the acceleration / deceleration signal, the hydraulic pressure moves the movable flanges 120 and 220 in opposite axial directions so as to vary the radius of the driving pulley 100 and the driven pulley 200, thereby performing stepless speed change. The pulley 200 is supplied with a high pressure line pressure to control the maximum torque that can be transmitted, and the drive pulley 100 is supplied with a ratio pressure obtained by reducing the line pressure to vary and control the speed ratio.
그러나 종래의 벨트식 무단변속기는, 종동 풀리(200)에 고압의 라인압(40~50bar)을 공급하게 되므로 오일 펌프의 용량이 커져야만 하고, 이로 인하여 유압 및 기계적 손실이 크게 발생되는 단점이 있었다.However, since the conventional belt type continuously variable transmission supplies a high pressure line pressure (40 to 50 bar) to the driven pulley 200, the capacity of the oil pump must be increased, which causes a large hydraulic and mechanical loss. .
본 발명의 목적은, 오일 펌프의 용량을 대폭 감소시킬 수 있고, 특히 종동 풀리의 라인압을 낮추어 유압손실을 크게 감소시킬 수 있는, 벨트식 무단변속기를 제공함에 있다.It is an object of the present invention to provide a belt type continuously variable transmission that can greatly reduce the capacity of an oil pump and, in particular, can significantly reduce hydraulic loss by lowering the line pressure of a driven pulley.
본 발명은 상기의 목적을 달성하기 위하여, 종동 풀리의 출력축의 선단부에 유압 관로에 연통되는 실린더를 연결하고, 실린더의 양측에 복수의 피스톤을 구비하며, 유압공급시 피스톤에 연동하여 가동 플랜지를 밀어내도록 피스톤에 캠을 각기 연결하여 구성된 특징을 갖는다.In order to achieve the above object, the present invention connects a cylinder communicating with a hydraulic line to a distal end of an output shaft of a driven pulley, and includes a plurality of pistons on both sides of the cylinder, and pushes a movable flange in conjunction with a piston during hydraulic supply. The cams are connected to the pistons so as to be provided.
제1도는 일반적인 벨트식 무단변속기의 구성도.1 is a block diagram of a general belt continuously variable transmission.
제2도는 본 발명 벨트식 무단변속기의 구성도.2 is a block diagram of the belt-type continuously variable transmission of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
100 : 구동 풀리 110 : 입력축100: drive pulley 110: input shaft
111,211 : 고정 플랜지 120,220 : 가동 플랜지111,211: fixed flange 120,220: movable flange
200 : 종동 풀리 210 : 출력축200: driven pulley 210: output shaft
230 : 실린더 231,232 : 피스톤230: cylinder 231,232: piston
240,241 : 캠 300 : 벨트240,241: Cam 300: Belt
400 : 유압제어장치400: hydraulic control device
이하, 본 발명의 구체적인 실시예를 도면을 참조하여 다음과 같이 설명한다.Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
제2도는 본 발명 벨트식 무단변속기의 구성도를 나타낸 것으로, 입력축(110)에 고정 플랜지(111)를 형성하고, 고정 플랜지(111)에 대향하여 축방향 이동이 가능하도록 입력축(110)에 가동 플랜지(120)를 삽입하여 구동풀리(100)를 형성한다.2 is a view illustrating a configuration of the belt-type continuously variable transmission according to the present invention. The fixing flange 111 is formed on the input shaft 110 and is movable on the input shaft 110 to allow the axial movement to be opposed to the fixing flange 111. The flange 120 is inserted to form the driving pulley 100.
또한 출력축(210)에 고정 플랜지(211)를 형성하고, 고정 플랜지(211)에 대향하여 축방향 이동이 가능하도록 출력축(210)에 가동 플랜지(220)를 삽입하여 종동 풀리(200)를 형성한다.In addition, the fixed flange 211 is formed on the output shaft 210, and the movable flange 220 is inserted into the output shaft 210 to enable the axial movement to face the fixed flange 211 to form the driven pulley 200. .
상기 구동 풀리(100) 및 종동 풀리(200)는 상호 벨트(300)로 연결하며, 양측 풀리의 가동 플랜지(120)(220)는 유압제어장치(400)에 관로(Pp)(Ps)로 연결하여 변속비에 따른 제어압을 공급받도록 구성한다.The driving pulley 100 and the driven pulley 200 are connected to each other by the belt 300, the movable flanges 120, 220 of both pulleys are connected to the hydraulic control device 400 by a pipeline (Pp) (Ps). It is configured to receive the control pressure according to the gear ratio.
상기 종동 풀리(200)의 출력축(210)의 선단부에는 관로(Ps)에 연통되는 실린더(230)를 연결하고, 실린더(230)의 양측에 피스톤(231)(232)을 구비하며, 유압공급시 피스톤(231)(232)에 연동하여 가동 플랜지(220)를 밀어내도록 피스톤(231)(232)에 캠(240)(241)을 연결하여 구성된 것이다.The front end of the output shaft 210 of the driven pulley 200 is connected to the cylinder 230 in communication with the pipe line (Ps), and provided with pistons (231, 232) on both sides of the cylinder 230, when supplying hydraulic pressure It is configured by connecting the cams 240 and 241 to the pistons 231 and 232 to push the movable flange 220 in conjunction with the pistons 231 and 232.
따라서 가감속 신호에 따라 유압이 가동 플랜지(120)(220)를 상호 대향하는 축방향으로 이동시켜 구동 풀리(100)와 종동 풀리(200)의 반경을 각기 변화시킴으로써 무단변속을 행하는데, 여기서 종동 풀리(200)에는 고압의 라인압을 공급하여 전달가능한 최대의 토오크를 제어하고, 구동 풀리(100)에는 라인압을 감압시킨 비율압을 공급하여 변속비를 가변, 제어한다.Therefore, in accordance with the acceleration / deceleration signal, the hydraulic pressure moves the movable flanges 120 and 220 in opposite axial directions so as to vary the radius of the driving pulley 100 and the driven pulley 200, thereby performing stepless speed change. The pulley 200 is supplied with a high pressure line pressure to control the maximum torque that can be transmitted, and the drive pulley 100 is supplied with a ratio pressure obtained by reducing the line pressure to vary and control the speed ratio.
여기서 종동 풀리(200)는 관로(Ps)를 통한 라인압 공급시 변속비 제어유압이 실린더(230)에 작용하여 양측 피스톤(231)(232)을 진출시키고, 전진하는 피스톤(231)(232)은 캠(241)(241)을 각기 회동시키면서 캠(240)(241)의 회동반경 변화에 따라 가동 플랜지(220)가 고정 플랜지(211)측으로 밀려나 변속비를 가변시킨다.Here, the driven pulley 200 has a transmission ratio control hydraulic pressure acting on the cylinder 230 when the line pressure is supplied through the pipe line Ps to advance both pistons 231 and 232, and the pistons 231 and 232 to move forward. As the cams 241 and 241 are rotated, the movable flange 220 is pushed toward the fixing flange 211 in accordance with the rotational radius change of the cams 240 and 241, thereby changing the speed ratio.
이처럼 관로(Ps)의 라인압에 의한 실린더(230)와 캠(240)(241)에 의한 작동으로 종동 풀리(200)의 변속비를 제어함으로써 관로(Ps)의 최대 라인압을 약 20~30bar로 감소시킬 수 있다.Thus, by controlling the speed ratio of the driven pulley 200 by the operation of the cylinder 230 and the cam 240, 241 by the line pressure of the pipe line Ps to the maximum line pressure of the pipe line Ps to about 20 ~ 30bar Can be reduced.
이상과 같이 본 발명의 벨트식 무단변속기는, 종동 풀리(200)의 출력축(210)에 실린더(230)를 연결하고, 실린더의 피스톤(231)(232)에 캠(240)(241)을 회동가능케 연결하여 라인압에 의한 피스톤과 캠의 연동운동에 의해 가동 플랜지를 밀어 변속비를 제어함으로써, 관로의 최대 라인압 감소로 오일 펌프의 용량이 크게 감소되는 것은 물론, 라인압 감소에 따른 유압 및 기계적 손실을 감소시키는 효과를 갖는다.As described above, the belt-type continuously variable transmission of the present invention connects the cylinder 230 to the output shaft 210 of the driven pulley 200, and rotates the cams 240 and 241 to the pistons 231 and 232 of the cylinder. By controlling the transmission ratio by pushing the movable flange by the interlocking movement of the piston and cam by the line pressure, the capacity of the oil pump is greatly reduced due to the reduction of the maximum line pressure of the pipeline, as well as the hydraulic and mechanical Has the effect of reducing losses.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960066895A KR100241272B1 (en) | 1996-12-17 | 1996-12-17 | Transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960066895A KR100241272B1 (en) | 1996-12-17 | 1996-12-17 | Transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980048326A KR19980048326A (en) | 1998-09-15 |
| KR100241272B1 true KR100241272B1 (en) | 2000-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960066895A KR100241272B1 (en) | 1996-12-17 | 1996-12-17 | Transmission |
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| Country | Link |
|---|---|
| KR (1) | KR100241272B1 (en) |
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1996
- 1996-12-17 KR KR1019960066895A patent/KR100241272B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR19980048326A (en) | 1998-09-15 |
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