KR19980045581A - Belt type CVT - Google Patents
Belt type CVT Download PDFInfo
- Publication number
- KR19980045581A KR19980045581A KR1019960063774A KR19960063774A KR19980045581A KR 19980045581 A KR19980045581 A KR 19980045581A KR 1019960063774 A KR1019960063774 A KR 1019960063774A KR 19960063774 A KR19960063774 A KR 19960063774A KR 19980045581 A KR19980045581 A KR 19980045581A
- Authority
- KR
- South Korea
- Prior art keywords
- movable flange
- flange
- hydraulic pressure
- continuously variable
- belt
- Prior art date
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Classifications
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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
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
- F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
- F16H9/16—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts
- F16H9/18—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members using two pulleys, both built-up out of adjustable conical parts only one flange of each pulley being adjustable
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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
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
Abstract
본 발명은 벨트식 무단변속기(CVT)에 관한 것으로, 출력측 종동풀리의 고정 및 가동 플랜지(41)(60)를 상호 미끄럼 결합하고, 출력축에 가이드 핀(40a)을 형성하며, 가이드 핀(40a)에 끼워져 이동, 안내됨과 동시에 엔진부하에 따른 유압의 급격한 변동시 라인유압을 감소시킬 수 있도록 가동 플랜지(60)에 일정각도로 절곡된 가이드 홀(61)을 형성한 것인 바, 라인유압의 급격한 증가를 억제함과 동시에 라인압력을 신속히 정상화시키도록 된 것이다.The present invention relates to a belt continuously variable transmission (CVT), and the fixed and movable flange (41, 60) of the output driven driven pulley slidingly coupled to each other, to form a guide pin (40a) on the output shaft, guide pin (40a) The guide hole 61 bent at a certain angle is formed in the movable flange 60 so as to reduce the line hydraulic pressure when the hydraulic pressure is suddenly changed due to the engine load. At the same time, it is possible to quickly normalize the line pressure while suppressing the increase.
Description
본 발명은 벨트식 무단변속기(Continuously Variable Transmission; CVT)에 관한 것으로, 특히 엔진부하(engine load)의 급격한 상승시 라인의 유압이 급격히 증가하는 것을 억제함과 동시에 라인압력을 신속히 정상화시킴으로써 부하의 변화에 따른 라인압력을 안정시킬 수 있는 벨트식 무단변속기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt continuously variable transmission (CVT). In particular, a change in load is provided by rapidly normalizing line pressure while suppressing a sudden increase in line hydraulic pressure when a sudden increase in engine load occurs. The present invention relates to a belt type continuously variable transmission capable of stabilizing line pressure.
일반적으로 벨트식 무단변속기는 자동변속기(automatic transmission)의 일종으로서 양측 풀리(pulley)의 폭을 유압을 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 adjusting oil pressure of the width 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)을 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 to a belt or chain to transmit rotational power.
도 2는 종래 벨트식 무단변속기의 일예를 나타낸 구성도로서 입/출력축(100)에 고정 플랜지(101)가 일체로 형성되고, 고정 플랜지(101)에 대향하여 축방향 이동이 가능하도록 입/출력축(100)에 가동 플랜지(110)가 삽입되어 풀리(120)를 형성하면서 이 풀리(120)에 벨트(130)가 끼워진다.2 is a configuration diagram illustrating an example of a conventional belt continuously variable transmission, in which a fixed flange 101 is integrally formed on an input / output shaft 100 and an input / output shaft is configured to allow an axial movement to face the fixed flange 101. The belt 130 is fitted to the pulley 120 while the movable flange 110 is inserted into the pulley 120 to form the pulley 120.
가동 플랜지(110)의 몸체와 입/출력축(100) 사이에는 스플라인(spline)의 역할을 행하는 보올(140)이 끼워져 가동 플랜지(110)의 이동을 원활하게 하며, 또한 고정 플랜지(101)와 가동 플랜지(110)의 상호 대향하는 측면부는 경사면으로 형성되어 내측의 원주방향으로부터 외측의 원주방향으로 그 간격이 점차 증가한다.Between the body of the movable flange 110 and the input / output shaft 100 is fitted with a bowl 140, which serves as a spline to facilitate the movement of the movable flange 110, and also movable with the fixed flange 101 The mutually opposing side parts of the flange 110 are formed in an inclined surface, and the interval gradually increases from the inner circumferential direction to the outer circumferential direction.
따라서 차량의 주행시 가감속 신호에 따라 유압이 가동 플랜지(110)를 축방향으로 이동시키며, 벨트(130)가 풀리(120)의 움직임에 의해 변위되면서 즉, 회전반경의 변화에 의해 마치 기어비(grar比)를 변환시키는 것처럼 무단변속이 이루어진다.Therefore, the hydraulic pressure moves the movable flange 110 in the axial direction according to the acceleration / deceleration signal when the vehicle is running, and the belt 130 is displaced by the movement of the pulley 120, that is, the gear ratio (grar) is changed by the change of the rotation radius. Stepless shifts are made as if they were being converted.
그러나 종래의 벨트식 무단변속기는, 차량이 언덕길 등을 주행할 경우 엔진의 부하가 급격히 증가하면서 가동 플랜지(110)가 민감하게 반응하여 이동되므로, 이때 출력 풀리와 출력축에 작용하는 유압이 높아지는 것은 물론, 회로의 라인압력(line oil pressure)이 불안정해지며, 초기에 라인유압이 신속히 정상화(activation effort)되지 못하는 문제점이 있었다.However, in the conventional belt-type continuously variable transmission, since the movable flange 110 reacts sensitively while the load of the engine drastically increases when the vehicle travels on a hill, etc., the hydraulic pressure acting on the output pulley and the output shaft increases, of course. In other words, the line oil pressure of the circuit becomes unstable, and there is a problem that the line oil pressure is not quickly normalized (activation effort) at an initial stage.
이처럼 부하의 급격한 상승시는 출력축의 민감한 반응을 억제하여 높아진 라인압력을 감소시킬 필요성이 요구된다.In the case of such a sudden rise in load, it is necessary to suppress the sensitive response of the output shaft to reduce the increased line pressure.
본 발명은 목적은, 차량의 주행조건에 따라 엔진의 부하가 급격히 증가할 경우 이에 반응하여 출력축에 작용하는 라인유압의 상승을 억제함과 동시에 라인압력을 능동적으로 안정화시킬 수 있는 벨트식 무단변속기를 제공함에 있다.An object of the present invention is to provide a belt-type continuously variable transmission that can actively stabilize the line pressure while suppressing an increase in the line hydraulic pressure acting on the output shaft in response to a sudden increase in the load of the engine according to the driving conditions of the vehicle. In providing.
본 발명은 상기의 목적을 달성하기 위하여, 출력축에 가동 플랜지를 결합하여 미The present invention in order to achieve the above object, by coupling the movable flange to the output shaft
상기 가이드 홀은 일정각도만큼 절곡된 형태로하여, 엔진부하에 따른 급격한 유압의 작용시 가동 플랜지의 이동을 순간적으로 구속함으로써 라인유압의 상승을 억제하도록 구성된 특성을 갖는다.The guide hole is bent by a certain angle, and has a characteristic configured to suppress the increase in the line hydraulic pressure by temporarily restraining the movement of the movable flange during the action of a sudden hydraulic pressure according to the engine load.
도 1은 본 발명 벨트식 무단변속기의 구성도.1 is a block diagram of the present invention belt type continuously variable transmission.
도 2는 종래 벨트식 무단변속기의 일예를 나타낸 구성도.Figure 2 is a configuration diagram showing an example of a conventional belt continuously variable transmission.
*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10:입력축 11:고정 플랜지10: input shaft 11: fixed flange
20,60;가동 플랜지 30;구동 풀리20, 60; movable flange 30; driven pulley
40:출력축 40a:가이드 핀40: Output shaft 40a: Guide pin
41:고정 플랜지 50:메탈 베어링41: fixed flange 50: metal bearing
61:가이드 홀 70:종동 폴리61: guide hole 70: driven pulley
80:벨트80: belt
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.
도 1은 본 발명 벨트식 무단변속기의 구성도이다.1 is a block diagram of the belt-type continuously variable transmission of the present invention.
도 1과 같이, 입력축(10)에 고정 플랜지(11)를 형성하고, 입력축(10)을 통해 가동 플랜지(20)를 미끄럼이동가능케 삽입하여 구동 풀리(30)를 구성한다.As shown in FIG. 1, the fixing flange 11 is formed on the input shaft 10, and the driving flange 20 is configured by slidingly inserting the movable flange 20 through the input shaft 10.
출력축(40)에 고정 플랜지(41)를 형성하고, 고정 플랜지(41)의 몸체를 통해 메탈 부싱 또는 베탈 베어링을 결합하며, 메탈 베어링을 통해 가동 플랜지(60)를 미A fixed flange 41 is formed on the output shaft 40, a metal bushing or a beta bearing is coupled through the body of the fixed flange 41, and the movable flange 60 is pushed through the metal bearing.
상기 출력측의 가동 플랜지(60)에 방사상으로 가이드 홀(61)을 등간격으로 다수 형성하되, 가이드 홀(61)은 고정 플랜지(41)를 향하여 일정각도(β)만큼 절곡된 형태로 구성하고, 이 가이드 홀(61)에 여유있게 결합되도록 출력축(40)에 가이드 핀(40a)을 일체로 형성하여 유압의 변동에 따라 가동 플랜지(60)가 직선이동과 동시에 회동운동을 행하여 변속에 따른 구속력을 갖도록 구성한 것이다.A plurality of guide holes 61 are radially formed at the output flange 60 at the output side at equal intervals, but the guide holes 61 are configured to be bent by a predetermined angle β toward the fixing flange 41, The guide pin 40a is integrally formed on the output shaft 40 so that the guide hole 61 can be coupled with the guide hole 61, and the movable flange 60 performs the rotational movement simultaneously with the linear movement according to the fluctuation of the hydraulic pressure. It is configured to have.
따라서 본 발명의 무단변속기는 도 1과 같이, 차량의 주행시 가감속 신호에 따라 유압이 가동 플랜지(20)(60)를 상호 대응하는 축방향으로 작용하여 이동시키며, 벨트(80)가 양측 가동 플랜지(20)(60)의 움직임에 의해 변위되면서 구동풀리(30)와 종동풀리(70)의 회전수를 가변시켜 무단변속을 행한다.Therefore, the continuously variable transmission of the present invention, as shown in Fig. 1, the hydraulic pressure acts to move the movable flange 20, 60 in the axial direction corresponding to each other in accordance with the acceleration and deceleration signal when the vehicle travels, the belt 80 is the two movable flange Steps are continuously shifted by varying the rotational speed of the drive pulley 30 and the driven pulley 70 while being displaced by the movement of the (20) and (60).
여기서 차량이 언덕길 등을 주행함에 따라 엔진의 부하가 급격히 증가하여 종동풀리(70)의 가동 플랜지(60)에 높은 라인압력이 작용할 경우에는 그 구동 플랜지(60)를 일시적으로 구속시켜 이동 저항력을 갖도록 함으로써 라인압력이 높아지는 것을 억제한다.In this case, when the vehicle is traveling on a hill road or the like, the load of the engine increases rapidly, and when a high line pressure acts on the movable flange 60 of the driven pulley 70, the driving flange 60 is temporarily restrained to have a movement resistance. This suppresses the increase in the line pressure.
즉, 종동풀리(70)의 가동 플랜지(60)에 유압이 급격히 작용하면서 가동 플랜지(60)를 고정 플랜지(60)의 가이드 홀(61)이 출력축(40)의 가이드 핀(40a)을 따라 직진이동함과 동시에 가이드 홀(61)의 진행방향이 원주방향으로 β만큼 편향되어 있으므로 가동 플랜지(60)의 급격한 직진이동을 순간적으로 억제시킨다.That is, while the hydraulic pressure acts rapidly on the movable flange 60 of the driven pulley 70, the guide hole 61 of the fixed flange 60 goes straight along the guide pin 40a of the output shaft 40 while the hydraulic flange 60 acts rapidly. At the same time, since the traveling direction of the guide hole 61 is deflected by β in the circumferential direction, the rapid straight movement of the movable flange 60 is temporarily suppressed.
또한 가이드 홀(61)의 절곡부가 가이드 핀(40a)을 경과하면서 가동 플랜지(60)는 직전이동과 동시에 일정각도만큼 회동하여 이 과정중에 유압에 대응하는 저항력을 갖게됨으로써 초기에 라인압을 낮춰 유압을 정상화시킨다.In addition, as the bent portion of the guide hole 61 passes through the guide pin 40a, the movable flange 60 is rotated by a predetermined angle at the same time as the previous movement, thereby having a resistance force corresponding to the hydraulic pressure during this process, thereby lowering the line pressure initially. Normalize
정상적인 주행조건에서의 경우 가이드 홀(61)이 가이드 핀(40a)의 절곡부를 통과하면서 가동 플랜지(60)가 직진이동상태로부터 회동 및 직진이동상태로 전환되는 것이 마찬가지이나, 이 경우 가이드 홀(61)은 균일한 유압에 의해 가이드 핀(40a)을 통해 비교적 완만하고 일정한 속도로 통과하므로 가동 플랜지(60)의 구속력은 발생하지 아니한다.Under normal driving conditions, the guide flange 61 passes through the bent portion of the guide pin 40a, and the movable flange 60 is switched from the linear movement state to the rotational and linear movement state, but in this case, the guide hole 61 ) Passes through the guide pin 40a by a uniform hydraulic pressure at a relatively gentle and constant speed, so that the restraint force of the movable flange 60 does not occur.
이상과 같이 본 발명의 벨트식 무단변속기는, 종동 풀리(70)의 출력축(40)에 가이드 핀(40a)을 형성하고, 가이드 핀을 통해 결합되어 직선이동 및 회동, 안내되도록 종동풀리의 가동 플랜지(60)에 가이드 홀(61)을 형성하여, 엔진의 급격한 부하 변동시 풀리의 작동유압이 급상승될 경우 가동 플랜지를 순간적으로 구속시킴으로써 변속기의 출력유압의 변동, 상승되는 것을 억제한다.As described above, the belt type continuously variable transmission of the present invention forms a guide pin 40a on the output shaft 40 of the driven pulley 70, and is coupled through the guide pin so that the movable flange of the driven pulley is linearly moved, rotated and guided. The guide hole 61 is formed in the 60 to restrain the fluctuation and rise of the output hydraulic pressure of the transmission by temporarily restraining the movable flange when the operating hydraulic pressure of the pulley suddenly rises during the sudden load fluctuation of the engine.
또한 작동유압의 변동에 의해 가동 플랜지가 급격히 이동되는 것을 방지함에 따라 초기 라인의 유압을 신속히 정상화시키며, 아울러 유압라인의 압력을 안정화시키는 효과가 있다.In addition, since the movable flange is prevented from being rapidly moved due to the change in the operating hydraulic pressure, the hydraulic pressure of the initial line is quickly normalized, and the pressure of the hydraulic line is stabilized.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960063774A KR100241270B1 (en) | 1996-12-10 | 1996-12-10 | Transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960063774A KR100241270B1 (en) | 1996-12-10 | 1996-12-10 | Transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980045581A true KR19980045581A (en) | 1998-09-15 |
| KR100241270B1 KR100241270B1 (en) | 2000-03-02 |
Family
ID=19486903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960063774A KR100241270B1 (en) | 1996-12-10 | 1996-12-10 | Transmission |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100241270B1 (en) |
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1996
- 1996-12-10 KR KR1019960063774A patent/KR100241270B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR100241270B1 (en) | 2000-03-02 |
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