KR20040050552A - Independent suspension axle type differential having a rigid axle type differential function and method controlling the differential - Google Patents

Independent suspension axle type differential having a rigid axle type differential function and method controlling the differential Download PDF

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Publication number
KR20040050552A
KR20040050552A KR1020020078405A KR20020078405A KR20040050552A KR 20040050552 A KR20040050552 A KR 20040050552A KR 1020020078405 A KR1020020078405 A KR 1020020078405A KR 20020078405 A KR20020078405 A KR 20020078405A KR 20040050552 A KR20040050552 A KR 20040050552A
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KR
South Korea
Prior art keywords
axle type
differential
independent suspension
constant velocity
hydraulic
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KR1020020078405A
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Korean (ko)
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KR100494918B1 (en
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김태우
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현대자동차주식회사
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Priority to KR10-2002-0078405A priority Critical patent/KR100494918B1/en
Publication of KR20040050552A publication Critical patent/KR20040050552A/en
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Publication of KR100494918B1 publication Critical patent/KR100494918B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G3/00—Resilient suspensions for a single wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/06—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/10—Independent suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/40—Indexing codes relating to the wheels in the suspensions
    • B60G2200/422—Driving wheels or live axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/413—Hydraulic actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/416—Fluid actuator using a pump, e.g. in the line connecting the lower chamber to the upper chamber of the actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/416—Ball or spherical joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/95—Automatic Traction or Slip Control [ATC]
    • B60G2800/954—Four-wheel drive

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

PURPOSE: An independent suspension axle-type differential having a rigid axle-type differential function and a control method thereof are provided to secure smooth off-road travel and improve riding comfort. CONSTITUTION: An independent suspension axle-type differential(21) having a rigid axle-type differential function includes an axle type selection unit restricting vertical shake of first and second constant velocity joints(27,29) and making the first and second constant velocity joints selectively form a rigid axle type and an independent suspension axle type. The axle type selection unit includes a selection unit(31) operating by a driver; a hydraulic pump(33) driven or stopped to produce and supply hydraulic pressure or discharge hydraulic pressure according to the selection operation of the rigid axle type and the independent suspension axle type of the selection switch; and first and second hydraulic cylinders(35,37) interposed between both sides of a differential housing(39) and the first and second constant velocity joints, to restrict the vertical shake of the first and second constant velocity joints by operating by the hydraulic pressure supplied from the hydraulic pump.

Description

리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜 및 그 제어방법{INDEPENDENT SUSPENSION AXLE TYPE DIFFERENTIAL HAVING A RIGID AXLE TYPE DIFFERENTIAL FUNCTION AND METHOD CONTROLLING THE DIFFERENTIAL}Independent Suspension Axle Type Differential with Rigid Axle Type Differential Function and Its Control Method {INDEPENDENT SUSPENSION AXLE TYPE DIFFERENTIAL HAVING A RIGID AXLE TYPE DIFFERENTIAL FUNCTION AND METHOD CONTROLLING THE DIFFERENTIAL}

본 발명은 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜 및 그 제어방법에 관한 것으로서, 보다 상세하게는 필요에 따라 리지드 액슬 또는 독립 현가 액슬을 선택하여 오프로드 주행 원활과 승차감 향상을 추구하는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜 제어방법에 관한 것이다.The present invention relates to an independent suspension axle type differential having a rigid axle type differential function and a control method thereof, and more particularly, to select a rigid axle or an independent suspension axle as needed to achieve smooth off-road driving and improved ride comfort. The present invention relates to an independent suspension axle type differential control method having an axle type differential function.

일반적으로 후륜 구동 및 4륜 구동 차량에서 리어 구동계는 도 1에 도시된 바와 같은 리지드 액슬 타입 디퍼렌셜을 많이 적용하고 있다.In general, in the rear wheel drive and four wheel drive vehicles, the rear drive system employs a lot of rigid axle type differentials as shown in FIG. 1.

이 리지드 액슬 타입 디퍼렌셜(1)은 그 양측에 구동축(3, 5)을 일직선 상태로 구성하기 때문에, 많은 하중이 걸려도 지상고의 변화를 적게 하고, 특히 오프로드에서 도 1과 같은 상태를 유지하기 때문에 주행에 유리한 점을 가지고 있으나, 온로드 주행시 승차감을 저하시킨다.Since the rigid axle type differential 1 has the drive shafts 3 and 5 in a straight state on both sides thereof, the change in the ground clearance is reduced even when a large load is applied, and in particular, the off-road maintains the same state as in FIG. It has an advantage in driving, but it reduces the riding comfort when driving on-road.

이러한 리지드 액슬 타입의 단점을 개선하기 위하여, 3링크, 4링크, 또는 5링크 타입이 사용되고 있으나, 도 2에 도시된 바와 같은 독립 현가 액슬 타입에는 미치지 못하고 있다.In order to improve the disadvantage of the rigid axle type, a three-link, four-link, or five-link type is used, but it does not reach the independent suspension axle type as shown in FIG.

이 독립 현가 액슬 타입 디퍼렌셜(7)은 그 양측에 등속조인트(9, 11)를 구비하고 있기 때문에 승차감을 개선하는 장점을 가지고 있으나, 오프로드에서 도 3의 상태로 제어되어 적재 하중 증가에 따른 지상고 악화로 지상 돌기물(13)과 간섭을 일으키는 단점을 가지고 있다.Since the independent suspension axle type differential 7 has constant joints 9 and 11 on both sides thereof, it has the advantage of improving ride comfort, but it is controlled in the state of FIG. Deterioration has a disadvantage of causing interference with the ground projections (13).

본 발명은 상기와 같은 단점을 해결하기 위하여 발명된 것으로서, 본 발명의 목적은 필요에 따라 리지드 액슬 또는 독립 현가 액슬을 선택하여 오프로드 주행 원활과 승차감 향상을 추구하는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜 및 그 제어방법을 제공하는 데 있다.The present invention has been invented to solve the above disadvantages, and an object of the present invention is to select a rigid axle or an independent suspension axle as needed to have an independent axle type differential function for smooth driving and improved ride comfort. A suspension axle type differential and its control method are provided.

이 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜은,Independent suspension axle type differential with this rigid axle type differential function,

후륜 및 4륜 구동 차량의 리어 구동계에서 디퍼렌셜의 양측에 각각 제공되는 제1, 2 등속조인트로 뒷바퀴에 구동력을 전달하며,In the rear drive system of the rear wheel and four wheel drive vehicles, the driving force is transmitted to the rear wheels with the first and second constant velocity joints provided on both sides of the differential, respectively.

이 제1, 2 등속조인트의 상하 요동을 제한하여 제1, 2 등속조인트를 선택적으로 리지드 액슬 타입과 독립 현가 액슬 타입으로 실현하는 액슬 타입 선택수단을 포함한다.And axle type selecting means for restricting the up and down fluctuations of the first and second constant velocity joints to selectively realize the first and second constant velocity joints as a rigid axle type and an independent suspension axle type.

이 액슬 타입 선택수단은 운전자에 의하여 조작되는 선택 스위치,The axle type selection means includes a selection switch operated by a driver,

이 선택 스위치의 리지드 액슬 타입 또는 독립 현가 액슬 타입의 선택 조작에 따라 구동 또는 정지되어 유압을 발생 공급 또는 배출시키는 유압펌프,A hydraulic pump which is driven or stopped in accordance with a selection operation of a rigid axle type or an independent suspension axle type of the selection switch to generate or supply hydraulic pressure;

이 유압펌프로부터 공급되는 유압에 의하여 신축 작동되어 제1, 2 등속조인트의 상하 요동을 구속하도록 디퍼렌셜 하우징의 양측과 이에 대향하는 제1, 2 등속조인트 사이에 개재되는 제1, 2 유압실린더로 구성되어 있다.It consists of first and second hydraulic cylinders interposed between both sides of the differential housing and the first and second constant velocity joints opposed thereto so as to be stretched and operated by the hydraulic pressure supplied from the hydraulic pump to restrain the vertical fluctuations of the first and second constant velocity joints. It is.

이 제1 유압실린더는 그 상단이 차폭 방향으로 선회하도록 디퍼렌셜 하우징에 힌지로 장착되고, 그 하단이 제1 등속조인트에 개재되는 베어링에 볼조인트로 연결되어, 제1 등속조인트의 상하 유동을 구속하면서도 제1 등속조인트의 회전을 자유롭게 하고 있다.The first hydraulic cylinder is hinged to the differential housing so that its upper end pivots in the vehicle width direction, and its lower end is connected to a bearing interposed in the first constant velocity joint by a ball joint, thereby restraining the up and down flow of the first constant velocity joint. The rotation of the first constant velocity joint is freed.

이 제2 유압실린더는 그 상단이 차폭 방향으로 선회하도록 디퍼렌셜 하우징에 힌지로 장착되고, 그 하단이 제2 등속조인트에 개재되는 베어링에 볼조인트로 연결되어, 제2 등속조인트의 상하 유동을 구속하면서도 제2 등속조인트의 회전을 자유롭게 하고 있다.The second hydraulic cylinder is hinged to the differential housing so that its upper end pivots in the vehicle width direction, and its lower end is connected to a bearing interposed by the second constant velocity joint with a ball joint, thereby restraining the up and down flow of the second constant velocity joint. The rotation of the second constant velocity joint is freed.

또한, 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜의 제어방법은,Moreover, the control method of the independent suspension axle type differential which has a rigid axle type differential function is

오프로드 주행으로 리지드 액슬 타입이 요구됨에 따라 운전자가 선택 스위치로 리지드 액슬 타입 모드 또는 독립 현가 타입 모드를 선택하는 모드 선택 단계,Mode selection step in which the driver selects the rigid axle type mode or the independent suspension type mode with the selection switch as the rigid axle type is required for off-road driving,

이 모드 선택 단계에서 리지드 액슬 타입 모드가 선택되면 유압펌프가 유압을 발생시켜 제1, 2 유압실린더에 공급하는 유압 공급 단계,When the rigid axle type mode is selected in this mode selection step, the hydraulic pump generates hydraulic pressure and supplies the hydraulic pressure to the first and second hydraulic cylinders.

이 유압 공급 단계에서 제1, 2 유압실린더에 유압이 공급되면 제1, 2 유압실린더가 신장되어 제1, 2 등속조인트를 회전 가능한 상태로 디퍼렌셜 하우징에 연결하여 리지드 액슬 타입을 형성하는 리지드 액슬 타입 구현 단계,When the hydraulic pressure is supplied to the first and second hydraulic cylinders in this hydraulic pressure supply step, the first and second hydraulic cylinders are extended to connect the first and second constant velocity joints to the differential housing in a rotatable state to form a rigid axle type. Implementation steps,

상기 모드 선택 단계에서 독립 현가 액슬 타입 모드가 선택되면 유압펌프가정지되면서 제1, 2 유압실린더로부터 유압을 배출시키는 유압 배출 단계,When the independent suspension axle type mode is selected in the mode selection step, the hydraulic pump is stopped and the hydraulic discharge step of discharging the hydraulic pressure from the first and second hydraulic cylinders,

이 유압 배출 단계에서 제1, 2 유압실린더에 공급되었던 유압이 배출되면 제1, 2 유압실린더에 가하던 구속력이 해제되어 제1, 2 등속조인트를 회전 및 상하 요동 가능한 상태로 제어하여 독립 현가 액슬 타입을 형성하는 독립 현가 액슬 타입 구현 단계를 포함한다.When the hydraulic pressure supplied to the first and second hydraulic cylinders is discharged in this hydraulic discharge stage, the restraining force applied to the first and second hydraulic cylinders is released to control the first and second constant velocity joints in a state capable of rotating and swinging up and down independently. An independent suspension axle type implementation step of forming the type.

도 1은 종래기술에 따른 리지드 액슬 타입 디퍼렌셜의 간략도.1 is a simplified diagram of a rigid axle type differential according to the prior art.

도 2는 종래기술에 따른 독립 현가 액슬 타입 디퍼렌셜의 간략도.2 is a simplified diagram of an independent suspension axle type differential according to the prior art.

도 3은 도 2의 독립 현가 액슬 타입 디퍼렌셜의 오프로드에서의 작동 상태도.3 is an operating state diagram in the off-road of the independent suspension axle type differential of FIG.

도 4는 본 발명에 따른 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜의 간략도.4 is a simplified diagram of an independent suspension axle type differential having a rigid axle type differential function in accordance with the present invention.

도 5는 본 발명에 따른 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜의 오프로드에서의 작동 상태도.5 is an operating state diagram in the off-road of the independent suspension axle type differential having a rigid axle type differential function according to the present invention.

도 6은 본 발명에 따른 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜의 제어방법의 순서도.6 is a flowchart of a control method of an independent suspension axle type differential having a rigid axle type differential function according to the present invention.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

21 : 디퍼렌셜23, 25 : 뒷바퀴21: differential 23, 25: rear wheel

27, 29 : 제1, 2 등속조인트31 : 선택 스위치27, 29: 1st, 2 constant velocity joint 31: selection switch

33 : 유압펌프35, 37 : 제1, 2 유압실린더33: hydraulic pump 35, 37: the first and second hydraulic cylinder

39 : 디퍼렌셜 하우징 41, 47 : 힌지39: differential housing 41, 47: hinge

43, 49 : 베어링 45, 51 : 볼조인트43, 49: bearing 45, 51: ball joint

53 : 지상 돌기물53: ground protrusions

본 발명의 이점과 장점은 이하의 바람직한 실시예를 첨부한 도면에 의거하여 상세히 설명함으로서 보다 명확하게 될 것이다.Advantages and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

도 4는 본 발명에 따른 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜의 간략도로서, 후륜 구동 및 4륜 구동 차량의 리어 구동계에 적용되어, 디퍼렌셜(21)의 양측에 연결되는 뒷바퀴(23, 25)를 구동시키는 제1, 2 등속조인트(27, 29)의 상하 요동을 구속 또는 해방하여, 필요에 따라 리지드 액슬 타입 모드 또는 독립 현가 액슬 타입 모드를 선택적으로 구현할 수 있도록 구성되어 있다.4 is a simplified diagram of an independent suspension axle type differential having a rigid axle type differential function according to the present invention, which is applied to the rear drive system of a rear wheel drive and a four wheel drive vehicle and is connected to both sides of the differential 21. It is configured to selectively implement the rigid axle type mode or the independent suspension axle type mode as necessary, by restraining or releasing the up and down fluctuations of the first and second constant velocity joints 27 and 29 for driving 25.

이 독립 현가 액슬 타입에서 제1, 2 등속조인트(27, 29)는 독립적으로 상하 유동할 수 있도록 구성되어 차량의 승차감을 증대시키고 있다. 따라서 본 실시 예는 평상시에는 독립 현가 액슬 타입으로 구동되고, 오프로드에서 디퍼렌셜(21)과 지상의 돌기물의 간섭을 극복하기 위하여 리지드 액슬 타입으로 구동되는 것을 예시하고 있다.In this independent suspension axle type, the first and second constant velocity joints 27 and 29 are configured to flow independently up and down, thereby increasing the ride comfort of the vehicle. Therefore, the present embodiment is driven in an independent suspension axle type in normal times, and driven in a rigid axle type in order to overcome the interference of the differential 21 and the ground protrusions in the off-road.

이 제1, 2 등속조인트(27, 29)가 리지드 액슬 타입으로 구동되면 차량이 오프로드를 주행하더라도 주행 시 디퍼렌셜(21)과 지상의 돌기물의 간섭이 방지된다.When the first and second constant velocity joints 27 and 29 are driven in a rigid axle type, interference between the differential 21 and the ground protrusions is prevented even when the vehicle travels off-road.

이를 위하여 제1, 2 등속조인트(27, 29)는 액슬 타입 선택수단에 의하여 상하 요동이 제한되면서 리지드 액슬 타입과 독립 현가 액슬 타입을 선택적으로 구현하게 된다.To this end, the first and second constant velocity joints 27 and 29 selectively implement the rigid axle type and the independent suspension axle type while the up and down swing is limited by the axle type selecting means.

이 액슬 타입 선택수단은 다양한 실시예에 의하여 구현될 수 있으나, 여기에 예시된 것은 선택 스위치(31)와 유압펌프(33) 그리고 제1, 2 유압실린더(35, 37)로 구성되어 있다.The axle type selecting means may be implemented by various embodiments, but the illustrated example is composed of a selection switch 31, a hydraulic pump 33 and first and second hydraulic cylinders 35 and 37.

선택 스위치(31)는 운전석에 구비되어 운전자에 의하여 선택 조작되며 리지드 액슬 타입 모드와 독립 현가 액슬 타입 모드를 선택할 수 있도록 구성됨이 바람직하다. 또한 이 선택 스위치(31)는 주행하는 도로의 상태를 자동으로 감지하는 센서(미도시)에 의하여 자동으로 선택 제어되는 구성으로 대치될 수도 있다.The selection switch 31 is provided in the driver's seat and is selected and operated by the driver, and configured to select the rigid axle type mode and the independent suspension axle type mode. In addition, the selection switch 31 may be replaced by a configuration that is automatically selected and controlled by a sensor (not shown) that automatically detects a state of a road to be driven.

상기 유압펌프(33)는 선택 스위치(31)의 조작에 따라 구동 및 정지되도록 구성되어 있다. 이 유압펌프(33)가 구동되면 상기 제1, 2 유압실린더(35, 37)에 유압을 공급하고, 이 유압펌프(33)가 정지되면 상기 제1, 2 유압실린더(35, 37)에 공급되었던 유압을 배출하게 된다.The hydraulic pump 33 is configured to be driven and stopped in accordance with the operation of the selection switch 31. When the hydraulic pump 33 is driven, the hydraulic pressure is supplied to the first and second hydraulic cylinders 35 and 37. When the hydraulic pump 33 is stopped, the hydraulic pump 33 is supplied to the first and second hydraulic cylinders 35 and 37. Exhausted hydraulic pressure.

또한, 이 유압펌프(33)는 차량이 별도로 구비되는 유압발생수단이 있는 경우에는 이 유압발생수단으로부터 공급되는 유압을 사용하도록 유로를 변경하는 솔레노이드 밸브로 대치될 수 있다. 이 솔레노이드 밸브는 선택 스위치(31) 또는 센서에 의하여 제어됨이 바람직하다.In addition, the hydraulic pump 33 can be replaced by a solenoid valve for changing the flow path to use the hydraulic pressure supplied from the hydraulic pressure generating means when the vehicle has a hydraulic pressure generating means provided separately. This solenoid valve is preferably controlled by the selector switch 31 or the sensor.

상기 유압펌프(33)로부터 공급되는 유압에 의하여 신축 제어되는 제1, 2 유압실린더(35, 37)는 각각 제1, 2 등속조인트(27, 29)의 상하 요동의 구속을 제어하도록 디퍼렌셜 하우징(39)의 양측과 제1, 2 등속조인트(27, 29) 사이에 각각 연결되어 있다.The first and second hydraulic cylinders 35 and 37, which are stretched and controlled by the hydraulic pressure supplied from the hydraulic pump 33, respectively, may control the differential housings to control the up and down oscillation of the first and second constant velocity joints 27 and 29, respectively. 39 are connected between both sides and the first and second constant velocity joints 27 and 29, respectively.

즉, 제1 유압실린더(35)는 디퍼렌셜 하우징(39)과 제1 등속조인트(27) 사이에 연결되어 있다. 제1 유압실린더(35)는 상단을 선회 중심으로 하단이 차폭 방향으로 선회하도록 그 상단이 디퍼렌셜 하우징(39)에 힌지(41)로 장착되어 있다.That is, the first hydraulic cylinder 35 is connected between the differential housing 39 and the first constant velocity joint 27. The first hydraulic cylinder 35 is attached to the differential housing 39 by a hinge 41 so that the lower end pivots in the vehicle width direction with the upper end pivoting.

그리고, 제1 유압실린더(35)의 하단은 제1 등속조인트(27)에 구비된 베어링(43)에 볼조인트(45)를 개재하여 연결되어 있다. 따라서 베어링(43)은 제1 등속조인트(27)의 회전을 가능하게 하고, 볼조인트(45)는 제1 등속조인트(27)의 상하 요동에 따른 제1 유압실린더(35)와 베어링(43)의 각도 변화를 가능하게 한다.The lower end of the first hydraulic cylinder 35 is connected to a bearing 43 provided in the first constant velocity joint 27 via a ball joint 45. Therefore, the bearing 43 enables the rotation of the first constant velocity joint 27, and the ball joint 45 is the first hydraulic cylinder 35 and the bearing 43 according to the up and down swing of the first constant velocity joint 27. Enables to change the angle of

또한, 제2 유압실린더(37)는 제1 유압실린더(37)의 반대측에 구비되어, 제1 유압실린더(35)가 제1 등속조인트(27)에 하는 작용과 동일한 작용을 제2 등속조인트(29)에 가하도록 구성되어 있다.In addition, the second hydraulic cylinder 37 is provided on the opposite side of the first hydraulic cylinder 37, the second constant velocity joint (the same action as the action of the first hydraulic cylinder 35 to the first constant velocity joint 27). 29).

즉, 제2 유압실린더(37)는 디퍼렌셜 하우징(39)과 제2 등속조인트(29) 사이에 연결되어 있다. 제2 유압실린더(37)는 상단을 선회 중심으로 하단이 차폭 방향으로 선회하도록 그 상단이 디퍼렌셜 하우징(39)에 힌지(47)로 장착되어 있다.That is, the second hydraulic cylinder 37 is connected between the differential housing 39 and the second constant velocity joint 29. The upper end of the second hydraulic cylinder 37 is pivotally attached to the differential housing 39 by a hinge 47 so that the lower end pivots in the vehicle width direction.

그리고, 제2 유압실린더(37)의 하단은 제2 등속조인트(29)에 구비된 베어링(49)에 볼조인트(51)를 개재하여 연결되어 있다. 따라서 베어링(49)은 제2 등속조인트(29)의 회전을 가능하게 하고, 볼조인트(51)는 제2 등속조인트(29)의 상하 요동에 따른 제2 유압실린더(37)와 베어링(45)의 각도 변화를 가능하게 한다.The lower end of the second hydraulic cylinder 37 is connected to the bearing 49 provided in the second constant velocity joint 29 via the ball joint 51. Accordingly, the bearing 49 enables the rotation of the second constant velocity joint 29, and the ball joint 51 has the second hydraulic cylinder 37 and the bearing 45 caused by the up and down swing of the second constant velocity joint 29. Enables to change the angle of

이와 같이 구성되는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜의 작용 효과는 도 6을 참조하여 그 제어방법을 설명함으로서 명확하게 될 것이다.The effect of the independent suspension axle type differential having the rigid axle type differential function configured as described above will be clarified by explaining the control method with reference to FIG. 6.

차량이 주행하는 도로 상태에 따라 운전자가 선택 스위치(31)를 선택 조작함에 따라 리지드 액슬 타입 모드 또는 독립 현가 타입 모드가 선택된다.The rigid axle type mode or the independent suspension type mode is selected as the driver selects and operates the selection switch 31 according to the road state on which the vehicle runs.

먼저, 리지드 액슬 타입 모드가 선택되면, 유압펌프(33)가 구동되어 유압을 발생시킨다. 이렇게 발생된 유압은 제1, 2 유압실린더(35, 37)에 공급된다.First, when the rigid axle type mode is selected, the hydraulic pump 33 is driven to generate hydraulic pressure. The hydraulic pressure thus generated is supplied to the first and second hydraulic cylinders 35 and 37.

이 유압의 공급에 의하여 제1, 2 유압실린더(35, 37)는 신장되어 제1, 2 등속조인트(27, 29)를 아래로 밀어 일정 각도를 유지하면서 디퍼렌셜 하우징(39)에 고정시키므로 제1, 2 등속조인트(27, 29)의 상하 요동을 구속하게 된다.By supplying the hydraulic pressure, the first and second hydraulic cylinders 35 and 37 are extended to push the first and second constant velocity joints 27 and 29 downward so as to be fixed to the differential housing 39 while maintaining a constant angle. , The up and down fluctuations of the two constant velocity joints 27 and 29 are restrained.

따라서, 제1, 2 등속조인트(27, 29)는 도 5에 도시된 바와 같은 리지드 액슬 타입을 형성하게 되어, 오프로드에서 적재 하중 증가 시에도 높은 지상고를 유지하여 디퍼렌셜(21)과 지상 돌기물(53)의 간섭을 방지시킨다.Accordingly, the first and second constant velocity joints 27 and 29 form a rigid axle type as shown in FIG. 5, and maintain the high ground clearance even when the load is increased in the off-road so that the differential 21 and the ground protrusions are maintained. 53 prevents interference.

한편, 오프로드를 벗어나거나 온로드에서는 운전자가 선택 스위치(31)를 독립 현가 타입 모드로 선택한다.On the other hand, in the off-road or on-road, the driver selects the selection switch 31 in the independent suspension type mode.

이 독립 현가 액슬 타입 모드가 선택되면 유압펌프(33)가 정지되면서, 제1, 2 유압실린더(35, 37)에 공급되었던 유압이 배출된다.When the independent suspension axle type mode is selected, the hydraulic pump 33 is stopped and the hydraulic pressure supplied to the first and second hydraulic cylinders 35 and 37 is discharged.

이 제1, 2 유압실린더(35, 37)에 공급되었던 유압이 배출되면 제1, 2 유압실린더(35, 37)에 가해지던 구속력이 해제된다.When the hydraulic pressure supplied to the first and second hydraulic cylinders 35 and 37 is discharged, the restraining force applied to the first and second hydraulic cylinders 35 and 37 is released.

이로 인하여 제1, 2 등속조인트(27, 29)는 상하 요동 가능한 상태로 제어되어 독립 현가 액슬 타입을 형성하게 되어, 승차감 향상에 기여하게 된다.As a result, the first and second constant velocity joints 27 and 29 are controlled to be able to swing up and down to form an independent suspension axle type, contributing to the improvement of ride comfort.

이와 같이 본 발명에 따른 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜은 독립 현가 액슬 타입 디퍼렌셜에 액슬 타입 선택 수단을 구비하여, 종래의 리지드 액슬 타입의 디퍼렌셜에 비하여 평상시에는 독립 현가 액슬 타입을 형성하여 승차감 향상에 기여하고, 종래의 독립 현가 액슬 타입의 디퍼렌셜에 비하여 오프로드 주행 시 등속조인트의 상하 요동을 구속하여 리지드 액슬 타입으로 제어하여 적재 하중 증가 시에도 높은 지상고를 유지하여 디퍼렌셜과 지상 돌기물의 간섭을 방지시킬 수 있다.As described above, the independent suspension axle type differential having the rigid axle type differential function has an axle type selection means in the independent suspension axle type differential, and forms an independent suspension axle type at ordinary times as compared to the conventional rigid axle type differential. By contributing to the improvement of ride comfort, and by restricting the up and down fluctuation of the constant velocity joint during off-road driving compared to the conventional independent suspension axle type differential, it is controlled by the rigid axle type to maintain the high ground height even when the loading load is increased. Interference can be prevented.

Claims (5)

디퍼렌셜의 양측에 각각 제공되는 제1, 2 등속조인트로 뒷바퀴에 구동력을 전달하는 후륜 및 4륜 구동 차량의 리어 구동계에 있어서,In the rear drive system of a rear wheel and a four wheel drive vehicle which transmits a driving force to the rear wheel with first and second constant velocity joints provided on both sides of the differential, 상기 제1, 2 등속조인트의 상하 요동을 제한하여 제1, 2 등속조인트를 선택적으로 리지드 액슬 타입과 독립 현가 액슬 타입으로 실현하는 액슬 타입 선택수단을 포함하는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜.Independent suspension axle having a rigid axle type differential function including an axle type selection means for restricting the up and down oscillation of the first and second constant velocity joints to selectively realize the first and second constant velocity joints as a rigid axle type and an independent suspension axle type. Type differential. 청구항 1에 있어서, 상기 액슬 타입 선택수단은 운전자에 의하여 조작되는 선택 스위치,The method according to claim 1, wherein the axle type selection means is a selection switch operated by a driver, 상기 선택 스위치의 리지드 액슬 타입 또는 독립 현가 액슬 타입의 선택 조작에 따라 구동 또는 정지되어 유압을 발생 공급 또는 배출시키는 유압펌프,A hydraulic pump driven or stopped according to a selection operation of a rigid axle type or an independent suspension axle type of the selection switch to generate or supply or discharge hydraulic pressure; 상기 유압펌프로부터 공급되는 유압에 의하여 신축 작동되어 제1, 2 등속조인트의 상하 요동을 구속하도록 디퍼렌셜 하우징의 양측과 이에 대향하는 제1, 2 등속조인트 사이에 개재되는 제1, 2 유압실린더를 포함하는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜.A first and second hydraulic cylinders interposed between the both sides of the differential housing and the first and second constant velocity joints facing the first and second constant velocity joints to expand and contract by the hydraulic pressure supplied from the hydraulic pump to restrain the vertical fluctuations of the first and second constant velocity joints. Independent suspension axle type differential with rigid axle type differential function to say. 청구항 2에 있어서, 상기 제1 유압실린더는 그 상단이 차폭 방향으로 선회하도록 디퍼렌셜 하우징에 힌지로 장착되고, 그 하단이 제1 등속조인트에 개재되는베어링에 볼조인트로 연결되는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜.3. The rigid axle type differential function of claim 2, wherein the first hydraulic cylinder is hinged to the differential housing so that the upper end thereof pivots in the vehicle width direction, and the lower end thereof is connected to a ball joint connected to a bearing interposed by the first constant velocity joint. Independent suspension axle type differential to have. 청구항 2에 있어서, 상기 제2 유압실린더는 그 상단이 차폭 방향으로 선회하도록 디퍼렌셜 하우징에 힌지로 장착되고, 그 하단이 제2 등속조인트에 개재되는 베어링에 볼조인트로 연결되는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜.3. The rigid axle type differential function of claim 2, wherein the second hydraulic cylinder is hingedly mounted on the differential housing such that its upper end pivots in the vehicle width direction, and the lower end thereof is connected by a ball joint to a bearing interposed in the second constant velocity joint. Independent suspension axle type differential to have. 오프로드 주행으로 리지드 액슬 타입이 요구됨에 따라 운전자가 선택 스위치로 리지드 액슬 타입 모드 또는 독립 현가 타입 모드를 선택하는 모드 선택 단계,Mode selection step in which the driver selects the rigid axle type mode or the independent suspension type mode with the selection switch as the rigid axle type is required for off-road driving, 상기 모드 선택 단계에서 리지드 액슬 타입 모드가 선택되면 의한 유압펌프가 유압을 발생시켜 제1, 2 유압실린더에 공급하는 유압 공급 단계,When the rigid axle type mode is selected in the mode selection step, the hydraulic pump by generating a hydraulic pressure supply to the first and second hydraulic cylinders, 상기 유압 공급 단계에서 제1, 2 유압실린더에 유압이 공급되면 제1, 2 유압실린더가 신장되어 제1, 2 등속조인트를 회전 가능한 상태로 디퍼렌셜 하우징에 연결하여 리지드 액슬 타입을 형성하는 리지드 액슬 타입 구현 단계,When the hydraulic pressure is supplied to the first and second hydraulic cylinders in the hydraulic pressure supply step, the first and second hydraulic cylinders are extended to connect the first and second constant velocity joints to the differential housing in a rotatable state to form a rigid axle type. Implementation steps, 상기 모드 선택 단계에서 독립 현가 액슬 타입 모드가 선택되면 유압펌프가 정지되면서 제1, 2 유압실린더로부터 유압을 배출시키는 유압 배출 단계,When the independent suspension axle type mode is selected in the mode selection step, the hydraulic pump is stopped and the hydraulic discharge step of discharging the hydraulic pressure from the first and second hydraulic cylinders, 상기 유압 배출 단계에서 제1, 2 유압실린더에 공급되었던 유압이 배출되면 제1, 2 유압실린더에 가하던 구속력이 해제되어 제1, 2 등속조인트를 회전 및 상하 요동 가능한 상태로 제어하여 독립 현가 액슬 타입을 형성하는 독립 현가 액슬 타입 구현 단계를 포함하는 리지드 액슬 타입 디퍼렌셜 기능을 가지는 독립 현가 액슬 타입 디퍼렌셜의 제어방법.When the hydraulic pressure supplied to the first and second hydraulic cylinders is discharged in the hydraulic discharge step, the restraining force applied to the first and second hydraulic cylinders is released to control the first and second constant velocity joints in a state capable of rotating and swinging up and down independently. A method of controlling an independent suspension axle type differential having a rigid axle type differential function comprising an independent suspension axle type implementation step of forming a type.
KR10-2002-0078405A 2002-12-10 2002-12-10 Independent suspension axle type differential having a rigid axle type differential function and method controlling the differential KR100494918B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106926897A (en) * 2017-03-23 2017-07-07 哈尔滨蒙鹰科技有限公司 8 × 8 offroad vehicle steering forward methods
KR200488104Y1 (en) 2017-12-20 2018-12-13 하영국 Paper cup with handle
CN109080400A (en) * 2018-08-03 2018-12-25 安徽天裕汽车零部件制造有限公司 A kind of Independent Suspension
EP3663112B1 (en) * 2018-12-04 2021-08-25 CNH Industrial Italia S.p.A. Suspension system for a work vehicle

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CN108944313B (en) * 2018-06-13 2020-03-20 杭州电子科技大学 Switchable suspension and damping and energy feedback method thereof

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JPH0532111A (en) * 1991-07-30 1993-02-09 Nissan Motor Co Ltd Car swing damping device
KR19980050622A (en) * 1996-12-21 1998-09-15 오상수 Electronic control suspension of vehicle and its method
KR19980046074U (en) * 1996-12-27 1998-09-25 박병재 Vehicle tilt correction device
JP2002079817A (en) * 2000-09-05 2002-03-19 Aichi Corp Wheel traveling device for vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106926897A (en) * 2017-03-23 2017-07-07 哈尔滨蒙鹰科技有限公司 8 × 8 offroad vehicle steering forward methods
KR200488104Y1 (en) 2017-12-20 2018-12-13 하영국 Paper cup with handle
CN109080400A (en) * 2018-08-03 2018-12-25 安徽天裕汽车零部件制造有限公司 A kind of Independent Suspension
EP3663112B1 (en) * 2018-12-04 2021-08-25 CNH Industrial Italia S.p.A. Suspension system for a work vehicle

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