KR20030082047A - Friction Plate Type Limited Slip Differential for Vehicle - Google Patents

Friction Plate Type Limited Slip Differential for Vehicle Download PDF

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Publication number
KR20030082047A
KR20030082047A KR1020020020556A KR20020020556A KR20030082047A KR 20030082047 A KR20030082047 A KR 20030082047A KR 1020020020556 A KR1020020020556 A KR 1020020020556A KR 20020020556 A KR20020020556 A KR 20020020556A KR 20030082047 A KR20030082047 A KR 20030082047A
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South Korea
Prior art keywords
friction plate
plate
friction
differential
differential case
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KR1020020020556A
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Korean (ko)
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KR100477515B1 (en
Inventor
최성현
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(주) 엠엔테크
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Priority to KR10-2002-0020556A priority Critical patent/KR100477515B1/en
Priority to PCT/KR2003/000748 priority patent/WO2003089812A1/en
Priority to AU2003219602A priority patent/AU2003219602A1/en
Publication of KR20030082047A publication Critical patent/KR20030082047A/en
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Publication of KR100477515B1 publication Critical patent/KR100477515B1/en

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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
    • F16H48/00—Differential gearings
    • F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
    • F16H48/22—Arrangements for suppressing or influencing the differential action, e.g. locking devices using friction clutches or brakes
    • 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
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
    • 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
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • F16H48/40—Constructional details characterised by features of the rotating cases
    • 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
    • F16H48/00—Differential gearings
    • F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
    • F16H2048/364—Differential gearings characterised by intentionally generating speed difference between outputs using electric or hydraulic motors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)

Abstract

PURPOSE: A friction plate-type limited slip differential for a vehicle is provided to stabilize a friction characteristic of a friction plate and enable elaborate torque control, not needing re-control of torque by the wear degree of the friction plate. CONSTITUTION: A friction plate-type limited slip differential for a vehicle comprises separable differential cases; right and left cams formed along spline-shaped groove parts formed to the separable differential cases; cam shafts supported by the cams; four pinion gears supported by the cam shafts; two side gears engaging with the pinion gears; pressure plates and clutch plates formed to the groove parts of the side gears and the differential case; and a coil spring formed between the clutch plate and the case. Lubrication grooves are formed to the pressure plate and the clutch plate.

Description

마찰판식 자동차용 차동 제한 장치 {Friction Plate Type Limited Slip Differential for Vehicle}Friction Plate Type Limited Slip Differential for Vehicle

본 발명은 자동차의 급발진 또는 선회시 차량의 직진 안정성 및 가속성 향상을 위해 좌우 바퀴에 알맞은 토크를 배분하는 마찰판식 자동차용 차동 제한 장치 구조에 관한 것이다.The present invention relates to a differential limiting device structure for a friction plate type vehicle that distributes torque suitable for left and right wheels to improve the linear stability and acceleration of the vehicle during rapid start or turn.

종래 마찰판식 차동 제한 장치에 관한 기술은 마찰판의 마찰 특성이 불안정하고, 토오크 배분을 일정하게 유지하기 위하여, 마찰판의 마모에 따라 마찰판 간극을 주기적으로 재조정 해야 하는 문제점이 있었다.The conventional friction plate type differential limiting device has a problem in that the friction characteristics of the friction plate are unstable, and in order to maintain a constant torque distribution, the friction plate gap must be periodically adjusted according to the wear of the friction plate.

또한 접시 스프링의 특성상 스프링 상수 조정이 어렵고 스프링 변위에 따른 작용력의 크기가 일정하지 못해 토오크 조정이 어려운 문제점이 있었다.In addition, it is difficult to adjust the spring constant due to the nature of the plate spring and torque adjustment is difficult because the magnitude of the action force according to the spring displacement is not constant.

본 발명의 목적은 상기 종래 기술의 문제점 해결을 위한 것으로서, 마찰판의 마찰 특성을 안정화 시키고, 마찰판의 마모량에 따른 토오크 재조정이 불필요할 뿐만 아니라 정교한 토오크 조정이 가능한 마찰판식 차동 제한 장치 구조를 제공하는 데 있다.An object of the present invention is to solve the problems of the prior art, to stabilize the friction characteristics of the friction plate, to provide a friction plate differential limiting device structure that can not only adjust the torque according to the wear amount of the friction plate, but also allows precise torque adjustment have.

상기 본 발명의 목적을 달성하기 위하여, 마찰판의 안정된 특성을 얻로록 마찰판 표면의 윤활홈 형상을 개선하여 마찰계수 설정을 적정화 하였다. 차동 토오크의 재조정 및 정교한 토오크 조정을 위하여 기존의 접시 스프링 대신 복수의 코일 스프링을 적용하였다.In order to achieve the object of the present invention, to achieve a stable characteristic of the friction plate to improve the shape of the lubrication groove on the surface of the friction plate to optimize the friction coefficient setting. In order to readjust the differential torque and adjust the precise torque, a plurality of coil springs are used instead of the conventional counter springs.

도 1은 본 발명 차동 제한 장치의 단면도이다.1 is a cross-sectional view of the present invention differential limiting device.

도 2는 본 발명 차동 장치의 분리 사시도이다.2 is an exploded perspective view of the differential device of the present invention.

도 3은 본 발명 차동 제한 장치의 분리 단면도이다.3 is an exploded cross-sectional view of the present invention's differential limiting device.

도 4는 본 발명 차동 제한 장치에 적용되는 프레셔 플레이드 및4 is a pressure plate applied to the present invention differential limiting device and

클러치 플레이트의 오일 홈 형상이다.The oil groove shape of the clutch plate.

1 : 프론트 디프 케이스 2 : 리어 디프 케이스1: front deep case 2: rear deep case

3 : 프론트 캠 4 : 리어 캠3: front cam 4: rear cam

5 : 사이드 기어 6 : 피니언 기어5: side gear 6: pinion gear

7 : 캠 샤프트 8 : 사이드 기어 스페이서7: camshaft 8: side gear spacer

9 : 프레셔 플레이트10 : 클러치 플레이트9: pressure plate 10: clutch plate

11 : 코일 스프링 12 : 스크루11: coil spring 12: screw

본 발명의 실시 예에 대하여 첨부된 도면을 참조하면서 상세히 설명하기로 한다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 전체 구조를 나타내는 단면도 이다. 도 1에 도시 된 바와 같이 분리형 디프렌셜 케이스 내부에 양단 끝에는 같은 토오크 분배를 갖는 베벨 기어 형태의 사이드기어를 구성한다.1 is a cross-sectional view showing the overall structure of the present invention. As shown in FIG. 1, a bevel gear-type side gear having the same torque distribution is formed at both ends of the separate differential case.

이 사이드 기어와 디프렌셜 케이스 사이에 마찰판을 구성한다. 마찰판은 클러치 플레이트와 프레셔 플레이트로 나뉘며, 프레셔 플레이트는 디프렌셜 케이스 스플라인 홈에 고정되고, 클러치 플레이트는 사이드 기어 홈부 에 고정된다. 클러치 플레이트는 프레셔 플레이트 사이사이에 위치하며 마찰판 사이의 마찰 특성에 의해 마찰력이 결정된다.A friction plate is formed between this side gear and the differential case. The friction plate is divided into a clutch plate and a pressure plate. The pressure plate is fixed to the differential case spline groove, and the clutch plate is fixed to the side gear groove. The clutch plate is located between the pressure plates and the frictional force is determined by the friction characteristics between the friction plates.

마찰판은, 마찰판 사이의 상대 미끌림으로 인해 마찰 특성이 불안정하면 고착 슬립이나 이음 발생의 원인이 되기 때문에 안정된 마찰 특성이 얻어지도록 제작 정밀도 향상, 마찰판 표면의 윤활홈 형상이나 표면처리의 적정화 등이 필수적이다.Since the friction plate is unstable due to the relative sliding between the friction plates, the friction plate may cause sticking slips or joints. Therefore, it is essential to improve the manufacturing precision and to optimize the shape of the lubrication grooves and the surface treatment of the friction plate to obtain stable friction characteristics. .

본 발명의 마찰판은 이러한 안정된 마찰 특성을 얻기 위하여 프레셔 플레이트와 클러치 프레이트 각각에 윤활홈을 설치하였다. 윤활홈 형상은 높은 하중에서도 윤활막을 유지하며 오일 배출이 용이한 구조로서 도 4와 같다.The friction plate of the present invention is provided with a lubrication groove in each of the pressure plate and the clutch plate in order to obtain these stable friction characteristics. The lubrication groove shape is shown in FIG. 4 as a structure that maintains a lubrication film even under high loads and is easy to discharge oil.

도 1에서, 캠은 디프렌셜 케이스 내부의 스플라인 홈부에 장착 가능하도록원주 방향으로 다수의 돌기를 형성하였다. 캠은 피니언 샤프트를 지지하며, 원주 방향의 경사면은 차동 발생시 축방향의 분력을 발생시켜 마찰판을 누르는 역할을 한다.In Figure 1, the cam is formed a plurality of projections in the circumferential direction to be mounted to the spline groove in the differential case. The cam supports the pinion shaft, and the circumferential inclined surface presses the friction plate by generating an axial component force when differential occurs.

마찰판과 디프렌셜 케이스 사이에는 프리로드를 갖는 코일 스프링을 설치한다. 캠이 코일 스프링의 프리로드를 이기고 축방향의 변위가 발생하기 시작하는 순간의 마찰판에 작용하는 토오크가 차동 토오크가 된다.A coil spring having a preload is installed between the friction plate and the differential case. The torque acting on the friction plate at the moment when the cam beats the preload of the coil spring and the axial displacement starts to occur is the differential torque.

코일 스프링 특성은 기존 접시 스프링 대비 변위에 대하여 하중 변화량이 일정하고 마찰판 마모에 의한 간극 증대로 인한 하중 변화에 민감하지 않으므로 마찰판 간극을 재조정할 필요가 없는 장점이 있다.The coil spring characteristic has the advantage that the load change amount is constant with respect to the displacement compared to the conventional plate spring and is not sensitive to the load change due to the increase in the gap caused by the wear of the friction plate, so that there is no need to readjust the friction plate gap.

사이드 기어는 4개의 피니언 기어와 물려있고 피니언 기어는 피니언 샤프트에 의해 지지 된다. 피니언 샤프트는 원주방향으로 경사진 홈 형상을 갖는 캠에 의해 지지 된다. 특히 본 발명에서는 피니언 기어를 4개 사용하여 차동 장치 구조를 고용량 소형화 하였다.The side gears are meshed with four pinion gears and the pinion gears are supported by the pinion shaft. The pinion shaft is supported by a cam having a groove shape inclined in the circumferential direction. In particular, the present invention uses four pinion gears to reduce the size of the differential device.

본 발명의 차동 제한 장치 원리는 다음과 같다.The principle of the differential limiting device of the present invention is as follows.

차동 장치에 차동이 발생하여 좌우 바퀴에 크기가 서로 다른 반력이 작용하고 양 사이드 기어에 토오크 차이가 발생하면, 피니언 기어에 원주 방향의 토오크가 발생하여 피니언 사프트가 원주 방향의 토오크가 발생한다. 이 토오크에 의하여 피니언 샤프트와 경사면으로 접촉하고 있는 캠은 경사면의 수직 방향의 반력이 발생하고 이 수직 방향의 힘은 원주방향의 힘과 축방향의 힘으로 나뉜다. 이 때 원주 방향의 힘은 디프렌셜 케이스에 의해 상쇄되고 축 방향의 힘은 캠을 마찰판에 밀착 시키는 방향으로 작용한다.If a differential occurs in the differential device and reaction forces of different sizes are applied to the left and right wheels, and torque difference is generated between both side gears, circumferential torque is generated in the pinion gear, so that the pinion shaft has circumferential torque. By this torque, the cam contacting the pinion shaft in the inclined surface generates a reaction force in the vertical direction of the inclined surface, and the vertical force is divided into a circumferential force and an axial force. At this time, the force in the circumferential direction is canceled by the differential case, and the force in the axial direction acts to bring the cam into close contact with the friction plate.

마찰판과 접촉하고 서로 대칭으로 설치 되어 있는 좌우 캠은 축 방향의 힘이 코일 스프링의 프리로드 보다 커지면 마찰판을 눌러 마찰판 사이에는 마찰 토오크가 발생하기 시작하고 이 순간의 마찰 토오크가 차동 제한 토오크가 된다. 따라서, 마찰 토오크는 디프렌셜 케이스에 전달되고 내부 부품들은 디프렌셜 케이스와 일체로 회전하여 차동이 제한 된다.The left and right cams, which are in contact with the friction plate and are installed symmetrically, have a friction torque between the friction plates when the axial force is greater than the preload of the coil spring, and the friction torque at this moment becomes the differential limiting torque. Therefore, the friction torque is transmitted to the differential case and the internal parts rotate integrally with the differential case to limit the differential.

이상에서 설명한 바와 같이, 본 발명은 마찰판식 차동 제한 장치의 구조로서 접시 스프링 대신 코일 스프링 채용으로 사용 중 마찰판 마모에 의한 간극 재조정의 번거로움이 없고, 4 피니언 기어의 채용으로 차동 장치의 소형 고용량화가 가능하며 마찰판의 마찰 특성 안정화로 마찰판의 슬립에 의한 고착 및 이음 발생을 방지할 수 있다As described above, the present invention is a structure of a friction plate type differential limiting device, which adopts a coil spring instead of a disc spring, and there is no hassle of re-adjusting the gap due to friction plate wear during use. It is possible to prevent the seizure of the friction plate and the occurrence of noise by stabilizing the friction characteristics of the friction plate.

Claims (3)

마찰판식 자동차용 차동 제한 장치 구조는, 분리형 디프렌셜 케이스와 디프렌셜 케이스 내부에 형성된 스플라인 형태의 홈부를 따라 구성되고 원주 면에 경사진 홈 형상을 갖는 좌우 캠과,The differential limiter structure for a friction plate type vehicle includes: a left and right cam having a groove shape inclined on the circumferential surface and formed along a spline-shaped groove formed inside the separate differential case and the differential case; 캠에 의해 지지되는 캠 샤프트와.A camshaft supported by the cam. 캠 샤프트에 의해 지지되는 4개의 피니언 기어와,Four pinion gear supported by the camshaft, 피니언 기어와 맞물려 회전하는 두개의 사이드 기어와.Two side gears that rotate in engagement with the pinion gears. 사이드 기어와 디프렌셜 케이스 홈부에 구성 된 프레셔 플레이트 및 클러치 플레이트와,With the pressure plate and clutch plate comprised in the side gear and differential case groove part, 클러치 플레이트와 케이스 사이에 형성된 코일 스프링을 포함하여 구성되고,It comprises a coil spring formed between the clutch plate and the case, 상기 디프렌셜 케이스는 캠과 마찰판이 원주방향의 운동이 구속되고 축 방향의 운동을 허용하는 스플라인 형태의 축 방향 홈과 윤활을 위한 다수의 윤활 구멍을 특징으로 하는 분리형 디프렌셜 케이스.The differential case is a separate differential case, characterized in that the cam and the friction plate is constrained in the circumferential direction, the spline-shaped axial groove to allow the axial movement and a plurality of lubrication holes for lubrication. 청구항 1에 기재한 장치에 있어서, 상기 프레셔 플레이트 및 클러치 플레이트에 있어서, 높은 하중에서도 윤활막을 유지하며 오일 배출이 용이하고 마찰계수를 적정화 하기 위한 마찰판의 오일홈 형상을 특징으로 하는 마찰판The apparatus according to claim 1, wherein the pressure plate and the clutch plate are characterized by an oil groove shape of a friction plate for maintaining a lubricating film even at high loads, easily draining oil, and optimizing a coefficient of friction. 청구항 1에 기재한 장치에 있어서, 변위에 대하여 하중 변화량이 일정하고 마찰판 마모에 의한 간극 증대로 인한 하중 변화에 민감하지 않으므로 마찰판 간극을 재조정할 필요가 없는 장점을 특징으로 하는 코일 스프링 구조The apparatus according to claim 1, wherein the load change amount is constant with respect to the displacement, and the coil spring structure is characterized in that it is not sensitive to the load change due to the increase in the gap caused by the wear of the friction plate, and thus it is not necessary to readjust the friction plate gap.
KR10-2002-0020556A 2002-04-16 2002-04-16 Friction Plate Type Limited Slip Differential for Vehicle KR100477515B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR10-2002-0020556A KR100477515B1 (en) 2002-04-16 2002-04-16 Friction Plate Type Limited Slip Differential for Vehicle
PCT/KR2003/000748 WO2003089812A1 (en) 2002-04-16 2003-04-14 Friction plate type limited slip differential for vehicle
AU2003219602A AU2003219602A1 (en) 2002-04-16 2003-04-14 Friction plate type limited slip differential for vehicle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007037647A1 (en) * 2005-09-30 2007-04-05 Industry-University Cooperation Foundation Sunmoon University Limited slip differential for vehicle
KR100760599B1 (en) * 2007-03-22 2007-10-04 한국필터 주식회사 Transfer device for addition apparatus of filter-press

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100889209B1 (en) * 2006-06-01 2009-03-17 임관순 A differential apparatus with clutch of cars
GB2462363A (en) * 2008-08-05 2010-02-10 Richard Michael Tracy Differential having a clutch control lever with an adjustable fulcrum
EP2169271A3 (en) * 2008-09-25 2011-04-13 Horizon Hobby Inc. Limited slip differential
US10066722B2 (en) 2017-01-05 2018-09-04 GM Global Technology Operations LLC Limited slip differentials with centrifugal spring mass actuator for vehicle powertrains

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HU195873B (en) * 1983-11-14 1988-07-28 Magyar Vagon Es Gepgyar Double-acting differential gear with slip limiting elements
JPS60164047A (en) * 1984-02-02 1985-08-27 Tochigi Fuji Ind Co Ltd Slip limiting type differential gear device
US4667534A (en) * 1985-10-18 1987-05-26 Tochigi-Fuji Sangyo Kabushiki Kaisha Limited slip differential gear mechanism
CA2133136A1 (en) * 1993-10-14 1995-04-15 Gregory T. Dewald Differential
KR970046375A (en) * 1995-12-29 1997-07-26 한승준 Clutch of automotive differential limiter
JPH11173404A (en) * 1997-12-09 1999-06-29 Shigehara Seisakusho:Kk Differential limiting device
US6238315B1 (en) * 1999-12-16 2001-05-29 David Marshall Morse Hydraulic coupling for vehicle drivetrain

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007037647A1 (en) * 2005-09-30 2007-04-05 Industry-University Cooperation Foundation Sunmoon University Limited slip differential for vehicle
KR100760599B1 (en) * 2007-03-22 2007-10-04 한국필터 주식회사 Transfer device for addition apparatus of filter-press

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AU2003219602A1 (en) 2003-11-03
WO2003089812A1 (en) 2003-10-30
KR100477515B1 (en) 2005-03-18

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