KR100785149B1 - Continuously variable transmission - Google Patents

Continuously variable transmission Download PDF

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KR100785149B1
KR100785149B1 KR1020060087526A KR20060087526A KR100785149B1 KR 100785149 B1 KR100785149 B1 KR 100785149B1 KR 1020060087526 A KR1020060087526 A KR 1020060087526A KR 20060087526 A KR20060087526 A KR 20060087526A KR 100785149 B1 KR100785149 B1 KR 100785149B1
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South Korea
Prior art keywords
shaft
friction wheel
drive shaft
driven shaft
wheel
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KR1020060087526A
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Korean (ko)
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신권수
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현대자동차주식회사
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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
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/26—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a spherical friction surface centered on its axis of revolution
    • F16H15/28—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a spherical friction surface centered on its axis of revolution with external friction surface
    • 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
    • F16H57/00—General details of gearing
    • F16H57/0018—Shaft assemblies for gearings
    • F16H57/0025—Shaft assemblies for gearings with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Abstract

A continuously variable transmission is provided to control an interval between a driving shaft frictional wheel and a follower shaft frictional wheel by using a ball-shaped frictional wheel. A driving shaft(10) is rotated by an engine, and a driving force of the driving shaft is transferred to wheels through a follower shaft(20). A driving shaft friction wheel(12) is fixed to the driving shaft, and has an inclined surface(14) at one side thereof. A follower shaft friction wheel(22) is engaged to the follower shaft by a spline(26), and has an inclined surface(24) at one side thereof. A ball-shaped frictional wheel(30) is disposed to come in frictional contact with the inclined surfaces, and is linearly moved to vary an interval between the frictional wheels.

Description

무단 변속장치 {CONTINUOUSLY VARIABLE TRANSMISSION} CVT {CONTINUOUSLY VARIABLE TRANSMISSION}

도 1은 본 발명에 따른 무단 변속장치의 구성도이다. 1 is a block diagram of a continuously variable transmission according to the present invention.

도 2는 본 발명에 따른 무단 변속장치의 작동 상태도이다.2 is an operational state diagram of the continuously variable transmission according to the present invention.

<도면의 주요 부분에 대한 부호의 설명> <Explanation of symbols for the main parts of the drawings>

10 : 구동축 12 : 구동축 마찰차 10: drive shaft 12: drive shaft friction difference

14 : 경사면 20 : 종동축 14: slope 20: driven shaft

22 : 종동축 마찰차 24 : 경사면22: driven shaft friction difference 24: inclined surface

26 : 스플라인 30 : 구형 마찰차26: spline 30: spherical friction difference

32 : 지지축 40 : 유압장치 32: support shaft 40: hydraulic device

본 발명은 무단변속장치에 관한 것으로서, 보다 상세하게는 그 구성이 단순하고 부품수를 줄일 수 있어 제조비용을 줄일 수 있는 무단변속장치에 관한 것이다.The present invention relates to a continuously variable transmission, and more particularly, to a continuously variable transmission in which the configuration thereof is simple and the number of parts can be reduced, thereby reducing the manufacturing cost.

일반적으로 차량에 사용되는 무단변속장치(CVT: Continuously Variable Transmission)는 자동 변속기와 달리 변속 충격이 없고 운전방법은 자동 변속기와 동일하며 연비는 수동변속기와 동일 내지는 약간 우수한 특징을 가지고있다.In general, continuously variable variable transmission (CVT), which is used in a vehicle, does not have a shift shock, unlike a automatic transmission, the driving method is the same as an automatic transmission, and the fuel economy is the same or slightly superior to a manual transmission.

이러한 상기 무단변속장치는 변속단수가 여러 단으로 구성되어 있어 기존의 변속기와 같이 변속 순간에 엔진 회전수가 낮아지지는 않는다.The continuously variable transmission is composed of a plurality of gear stages, and thus, the engine speed does not decrease at the time of shifting as in a conventional gearbox.

물론 기존의 변속기에도 일정 기어비를 다단화 하거나 기어비를 조금만 바꾸어도 출력이나 연비가 향상되기는 하지만 변속기 중량의 문제, 원가의 상승, 조작의 복잡성 등으로 인해 현재 수동은 5단, 자동은 4단이 보편적으로 사용되고 있다.Of course, even if the gear ratio is multi-stage or the gear ratio is slightly improved in the existing transmission, the output and fuel economy are improved, but due to the problem of the transmission weight, the cost increase, and the complexity of the operation, the five-speed manual and the four-speed automatic are common. It is used.

이에 반해 무단변속기는 원추형 가변폴리를 사용하여 기어비를 자동 변속함에 있어 최적의 엔진 출력을 최적으로 출력축에 전달하게 됨으로써 성능의 향상 및 연비를 높일 수 있게 되는 것이다.On the contrary, the continuously variable transmission uses the conical variable poly to automatically transmit the optimum engine power to the output shaft in automatically shifting the gear ratio, thereby improving performance and increasing fuel economy.

그러나, 현재 사용되는 무단 변속장치는 무단변속을 행하기 위해 그 구성이 복잡하고, 무게가 증가되며 제조비용이 높아지는 문제점이 있다. However, the continuously variable transmission currently used has a problem in that its configuration is complicated, weight is increased, and manufacturing costs are increased to perform continuously variable speed.

본 발명은 상기한 문제점을 해결하기 위하여 창출된 것으로서, 본 발명의 목적은 구성을 단순화하여 제조비용을 줄일 수 있으면서 무단변속 성능을 향상시킬 수 있는 무단 변속장치를 제공하는 데 있다. The present invention has been made to solve the above problems, an object of the present invention is to provide a continuously variable transmission that can improve the continuously variable performance while reducing the manufacturing cost by simplifying the configuration.

상기한 과제를 실현하기 위한 본 발명에 따른 무단 변속장치는 엔진의 구동력을 전달받아 회전되는 구동축과, 상기 구동축의 구동력을 전달받아 바퀴로 전달하는 종동축과, 상기 구동축에 고정되어 구동축과 같이 회전되고 일면에 경사면이 형성되는 구동축 마찰차와, 상기 종동축에 스플라인 결합되고 종동축과 같이 회전되고 그 일면에 경사면이 형성되는 종동축 마찰차와, 상기 구동축 마찰차의 경사면과 종동축 마찰차의 경사면에 마찰되도록 배치되고 직선 이동되면서 구동축 마찰차와 종동축 마찰차 사이의 간격을 가변시켜 변속을 수행하는 구형 마찰차를 포함하여 구성되는 것을 특징으로 한다.The continuously variable transmission according to the present invention for realizing the above object is a drive shaft which is rotated by receiving the driving force of the engine, a driven shaft which receives the driving force of the drive shaft and transmits it to the wheels, and is fixed to the drive shaft and rotates like the drive shaft And a drive shaft friction difference having an inclined surface formed on one surface thereof, a driven shaft friction difference splined to the driven shaft and rotating like a driven shaft, and having an inclined surface formed on one surface thereof, and an inclined surface and a driven shaft friction difference of the drive shaft friction difference formed therein. It is characterized in that it is configured to include a spherical friction difference that is shifted by varying the distance between the drive shaft friction difference and the driven shaft friction difference while being arranged to friction on the inclined surface and linearly.

상기 구형 마찰차는 그 일단에 지지축이 연결되고, 상기 지지축은 변속기 내부에 회전 가능하게 지지되고, 지지축의 끝단에는 유압장치가 연결되어 상기 지지축은 직선 왕복 이동시키는 것을 특징으로 한다.The spherical friction wheel has a support shaft connected to one end thereof, the support shaft is rotatably supported inside the transmission, and a hydraulic device is connected to the end of the support shaft so that the support shaft is linearly reciprocated.

이하, 첨부된 도면을 참조하여 본 발명의 일실시예를 설명하면 다음과 같다. Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명에 따른 무단 변속장치의 구성도이다.1 is a block diagram of a continuously variable transmission according to the present invention.

본 발명에 따른 무단 변속장치는 엔진의 구동력을 전달받아 회전되는 구동축(10)과, 상기 구동축(10)의 구동력을 전달받아 바퀴로 전달하는 종동축(20)과, 상기 구동축(10)에 고정되어 구동축(10)과 같이 회전되는 구동축 마찰차(12)와, 상기 종동축(20)에 스플라인(26) 결합되어 종동축(20)에 직선 이동 가능하게 결합되고 종동축(20)과 같이 회전되는 종동축 마찰차(22)와, 상기 구동축 마찰차(12)와 종동축 마찰차(22) 사이에 마찰되도록 배치되어 상기 구동축 마찰차(12)의 회전력을 종동축 마찰차(22)로 전달하는 구형 마찰차(30)로 구성된다.The continuously variable transmission according to the present invention includes a drive shaft 10 that is rotated by receiving a driving force of an engine, a driven shaft 20 that receives the driving force of the drive shaft 10 and transmits the same to a wheel, and is fixed to the drive shaft 10. And a drive shaft friction difference 12 that is rotated together with the drive shaft 10, and the spline 26 is coupled to the driven shaft 20 to be linearly coupled to the driven shaft 20, and rotates like the driven shaft 20. The driven shaft friction wheel 22 and the drive shaft friction wheel 12 and the driven shaft friction wheel 22 are arranged to friction to transfer the rotational force of the drive shaft friction wheel 12 to the driven shaft friction wheel 22 It consists of a spherical friction wheel 30 to be.

상기 구동축 마찰차(12)의 일면에는 구형 마찰차(30)가 마찰되는 면에 경사면(14)이 형성되고, 상기 종동축 마찰차(22)의 일면에도 상기 구형 마찰차(30)가 마찰되는 면에 경사면(24)이 형성된다.An inclined surface 14 is formed on one surface of the drive shaft friction wheel 12 at which the spherical friction wheel 30 is rubbed, and the spherical friction wheel 30 is also rubbed on one surface of the driven shaft friction wheel 22. An inclined surface 24 is formed on the surface.

여기에서 종동축 마찰차(22)의 경사면(24)의 길이는 상기 구동축 마찰차(12)의 경사면(14)의 길이에 비해 길게 하여 상기 구형 마찰차(30)와 마찰되는 길이를 길게 하여 변속이 보다 원활하게 이루어질 수 있도록 한다. Here, the length of the inclined surface 24 of the driven shaft friction wheel 22 is longer than the length of the inclined surface 14 of the drive shaft friction wheel 12 so as to lengthen the length of friction with the spherical friction wheel 30 and shifts. This can be done more smoothly.

상기 종동축 마찰차(22)는 종동축(20)과 스플라인(26) 결합되어 직선 이동되면서 상기 구동축 마찰차(12)와의 간격을 가변시킨다.The driven shaft friction difference 22 is coupled to the driven shaft 20 and the spline 26 to linearly move to vary the distance between the drive shaft friction difference 12.

상기 구형 마찰차(30)는 그 일측은 구동축 마찰차(12)의 경사면(14) 마찰되고 그 타측은 종동축 마찰차(22)의 경사면(24)에 접촉되는 구형으로 형성되고, 지지축(32)이 연결되며, 상기 지지축(32)은 변속기 내부에 회전 가능하게 베어링(34)에 의해 지지되고, 상기 지지축(32)의 끝부분은 유압장치(40)와 연결되어, 상기 유압장치(40)의 작동에 의해 지지축(32)이 직선 왕복 이동된다.The spherical friction wheel 30 is formed in a sphere contacting the inclined surface 14 of the drive shaft friction wheel 12 and the other side thereof in contact with the inclined surface 24 of the driven shaft friction wheel 22, the support shaft ( 32 is connected, the support shaft 32 is supported by the bearing 34 rotatably inside the transmission, the end of the support shaft 32 is connected to the hydraulic device 40, the hydraulic device By the operation of the 40, the support shaft 32 is linearly reciprocated.

이와 같이 구성되는 본 발명에 따른 무단 변속장치의 작용을 다음에서 설명한다. The operation of the continuously variable transmission according to the present invention configured as described above will be described below.

도 2는 본 발명에 따른 무단변속장치의 작동 상태도이다.2 is an operation state diagram of the continuously variable transmission according to the present invention.

먼저, 엔진의 구동력을 전달받는 구동축(10)이 회전되면 상기 구동축(10)과 일체로 형성된 구동축 마찰차(12)가 회전되고, 상기 구동축 마찰차(12)와 마찰되는 구형 마찰차(30)가 회전된다. 그리고, 구형 마찰차(30)와 마찰되는 종동축 마찰차(22)가 회전되고, 상기 종동축 마찰차(22)와 스플라인 결합되는 종동축(20)이 회전되면서 구동력이 바퀴로 전달된다. First, when the drive shaft 10 receiving the driving force of the engine is rotated, the drive shaft friction wheel 12 integrally formed with the drive shaft 10 is rotated, and the spherical friction wheel 30 that is rubbed with the drive shaft friction wheel 12. Is rotated. Then, the driven shaft friction wheel 22 is rubbed with the spherical friction wheel 30 is rotated, the driving force is transmitted to the wheel while the driven shaft 20 is splined to the driven shaft friction wheel 22 is rotated.

이때, 유압장치(40)의 작동에 의해 지지축(32)이 후퇴되면 종동축 마찰차(22)가 직선 이동되면서 구동축 마찰차(12)와 종동축 마찰차(22) 사이의 간격이 좁아지게 되고, 이에 따라 구형 마찰차(30)는 종동축 마찰차(22)의 경사면(24)의 상측에 마찰되어 구동축(10)의 회전력을 가속시켜 종동축(20)으로 전달한다. At this time, when the support shaft 32 is retracted by the operation of the hydraulic device 40, the driven shaft friction wheel 22 moves linearly so that the distance between the drive shaft friction wheel 12 and the driven shaft friction wheel 22 is narrowed. Accordingly, the spherical friction wheel 30 is rubbed on the upper side of the inclined surface 24 of the driven shaft friction wheel 22 to accelerate the rotational force of the drive shaft 10 to be transmitted to the driven shaft 20.

그리고, 이와 반대로 유압장치(40)의 작동에 의해 지지축(32)이 전진되면 상기 종동축 마찰차(22)가 직선 이동되면서 구동축 마찰차(12)와 종동축 마찰차(22) 사이의 간격이 벌어지고 이에 따라 구형 마찰차(30)는 종동축 마찰차(22)의 경사면(24) 하측으로 이동되면서 구동축(10)의 회전력을 감속시켜 종동축(20)으로 전달한다. On the contrary, when the support shaft 32 is advanced by the operation of the hydraulic device 40, the driven shaft friction wheel 22 is linearly moved while the distance between the drive shaft friction wheel 12 and the driven shaft friction wheel 22 is increased. The spherical friction wheel 30 is thus moved to the lower side of the inclined surface 24 of the driven shaft friction wheel 22 while reducing the rotational force of the drive shaft 10 and transmitting it to the driven shaft 20.

따라서, 상기와 같이 구성되고 작용되는 본 발명에 따른 무단 변속장치는 유압장치의 작동에 의해 구형 마찰차와 진진 및 후퇴 동작에 의해 구동축 마찰차와 종동축 마찰차의 간격을 조절하면서 변속이 이루어지는 구조이기 때문에 그 구조가 단순하고 부품수를 줄일 수 있으며 나아가 제조비용을 줄일 수 있는 이점이 있다.Accordingly, the continuously variable transmission apparatus according to the present invention configured and operated as described above has a structure in which shifting is performed while adjusting a distance between a drive friction wheel and a driven shaft friction wheel by an operation of a hydraulic device and a forward and backward motion. Because of this, the structure is simple, the number of parts can be reduced, and further, there is an advantage of reducing the manufacturing cost.

Claims (2)

엔진의 구동력을 전달받아 회전되는 구동축과;A drive shaft rotated by receiving a driving force of the engine; 상기 구동축의 구동력을 전달받아 바퀴로 전달하는 종동축과;A driven shaft which receives the driving force of the driving shaft and transmits the driving shaft to the wheel; 상기 구동축에 고정되어 구동축과 같이 회전되고 일면에 경사면이 형성되는 구동축 마찰차와;A drive shaft friction difference fixed to the drive shaft and rotated together with the drive shaft and having an inclined surface formed on one surface thereof; 상기 종동축에 스플라인 결합되고 종동축과 같이 회전되고 그 일면에 경사면이 형성되는 종동축 마찰차와;A driven shaft friction difference that is splined to the driven shaft and rotates like the driven shaft and has an inclined surface formed on one surface thereof; 상기 구동축 마찰차의 경사면과 종동축 마찰차의 경사면에 마찰되도록 배치되고 직선 이동되면서 구동축 마찰차와 종동축 마찰차 사이의 간격을 가변시켜 변속을 수행하는 구형 마찰차를 포함하여 구성되는 것을 특징으로 하는 무단 변속장치.And a spherical friction wheel configured to perform a shift by varying an interval between the drive shaft friction wheel and the driven shaft friction wheel while being linearly disposed and frictionally inclined on the inclined surface of the drive shaft friction wheel and the driven shaft friction wheel. Continuously variable transmission. 제 1 항에 있어서, The method of claim 1, 상기 구형 마찰차는 그 일단에 지지축이 연결되고, 상기 지지축은 변속기 내부에 회전 가능하게 지지되고, 지지축의 끝단에는 유압장치가 연결되어 상기 지지축은 직선 왕복 이동시키는 것을 특징으로 하는 무단 변속장치. The spherical friction wheel has a support shaft connected to one end thereof, the support shaft is rotatably supported inside the transmission, the end of the support shaft is connected to a hydraulic device, characterized in that the support shaft is linear reciprocating movement.
KR1020060087526A 2006-09-11 2006-09-11 Continuously variable transmission KR100785149B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63297853A (en) 1987-02-19 1988-12-05 Isao Matsui Transmission
JPH01126462A (en) * 1987-11-06 1989-05-18 Isao Matsui Automatic continuously variable transmission
JPH08135748A (en) * 1994-11-04 1996-05-31 Isao Matsui Automatic continuously variable transmitter
KR20050053818A (en) * 2003-12-03 2005-06-10 부산대학교 산학협력단 Traction dirve continuously various transmission

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63297853A (en) 1987-02-19 1988-12-05 Isao Matsui Transmission
JPH01126462A (en) * 1987-11-06 1989-05-18 Isao Matsui Automatic continuously variable transmission
JPH08135748A (en) * 1994-11-04 1996-05-31 Isao Matsui Automatic continuously variable transmitter
KR20050053818A (en) * 2003-12-03 2005-06-10 부산대학교 산학협력단 Traction dirve continuously various transmission

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