KR20000013940U - Front and rear wheel steering - Google Patents

Front and rear wheel steering Download PDF

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Publication number
KR20000013940U
KR20000013940U KR2019980027208U KR19980027208U KR20000013940U KR 20000013940 U KR20000013940 U KR 20000013940U KR 2019980027208 U KR2019980027208 U KR 2019980027208U KR 19980027208 U KR19980027208 U KR 19980027208U KR 20000013940 U KR20000013940 U KR 20000013940U
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South Korea
Prior art keywords
wheel steering
rear wheel
front wheel
cylinder
steering device
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KR2019980027208U
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Korean (ko)
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김진석
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추호석
대우중공업 주식회사
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Priority to KR2019980027208U priority Critical patent/KR20000013940U/en
Publication of KR20000013940U publication Critical patent/KR20000013940U/en

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Abstract

본 고안은 전후륜 조향장치에 관한 것으로, 기어박스(11)와, 드롭 아암(15), 전륜 조향실린더(12), 전륜 조향펌프(13) 및, 전륜 조향오일탱크(14)를 구비한 전륜 조향장치와; 방향전환 솔레노이드밸브(21)와, 후륜 조향실린더(22), 후륜 조향펌프(23) 및, 후륜 조향오일탱크(24)를 구비한 후륜 조향장치 및; 상기 전륜 조향장치의 기어박스(11)와 전륜 조향실린더(12) 사이의 유압라인과 상기 후륜 조향장치의 방향전환 솔레노이드밸브(21)와 후륜 조향실린더(22) 사이의 유압라인을 연결하는 방향전환 연동밸브(25)를 구비하는 바, 이 방향전환 연동밸브(25)가 전륜 조향실린더(12)에 가해진 유압에 따라 유로를 변경시켜 상기 후륜 조향펌프(23)에 의해 형성된 유압이 방향전환 솔레노이드밸브(21)를 거쳐 후륜 조향실린더(22)에 전달될 수 있어서, 전후륜의 조향조작이 간편하고 저가인 전후륜 조향장치를 제공하게 된다.The present invention relates to a front and rear wheel steering device, the front wheel having a gear box 11, a drop arm (15), a front wheel steering cylinder (12), a front wheel steering pump (13), and a front wheel steering oil tank (14). A steering device; A rear wheel steering device including a directional solenoid valve 21, a rear wheel steering cylinder 22, a rear wheel steering pump 23, and a rear wheel steering oil tank 24; Hydraulic direction switching between the gear box 11 and the front wheel steering cylinder 12 of the front wheel steering device and the hydraulic line between the direction switching solenoid valve 21 and the rear wheel steering cylinder 22 of the rear wheel steering device. A peristaltic valve 25 is provided, and the direction change peristaltic valve 25 changes the flow path according to the hydraulic pressure applied to the front wheel steering cylinder 12 so that the hydraulic pressure formed by the rear wheel steering pump 23 is the direction switching solenoid valve. It can be delivered to the rear wheel steering cylinder 22 via 21, thereby providing a simple and inexpensive front and rear wheel steering device for steering the front and rear wheels.

Description

전후륜 조향장치Front and rear wheel steering

본 고안은 차량의 전후륜 조향장치에 관한 것으로, 특히 크레인 차량의 전륜과 후륜을 모드에 따라 연동시키는 전후륜 조향장치에 관한 것이다.The present invention relates to a front and rear wheel steering device of a vehicle, and more particularly to a front and rear wheel steering device for interlocking the front wheel and the rear wheel of the crane vehicle according to the mode.

일반적으로, 4축조향 차량에는 전륜 조향장치와 후륜 조향장치가 기계적으로 연동되거나 전륜과 후륜 조향장치가 독립적으로 장착되는데, 연동되는 결합은 대형장비나 고가의 차량에 사용되는 한편, 저가의 차량에는 전륜과 후륜의 조향장치가 독립적으로 설치되어 있다.In general, a four-axis steering vehicle has a front wheel steering system and a rear wheel steering system mechanically interlocked, or the front and rear wheel steering system is mounted independently, the interlocking combination is used for large equipment or expensive vehicles, Front and rear wheel steering systems are installed independently.

도 2는 종래 전륜 조향장치의 유압회로도로서, 이는 기어박스(11)와, 드롭 아암(drop arm;15), 전륜 조향실린더(12), 전륜 조향펌프(13) 및, 전륜 조향오일탱크(14)를 구비하는 바, 상기 전륜 조향펌프(13)로 형성된 유압이 기어박스(11)에 전달된 상태에서 운전자의 핸들조작에 의해 입력축(input shaft;도시되지 않음)에 전달되는 회전에 따라 상기 드롭아암(15)을 회전시키고, 이 회전방향에 따라 조향이 이루어지면서 전륜 조향실린더(12)로 조향력을 증대시키는데, 상기 입력축의 회전이 시계방향이면 드롭아암(15)은 반시계방향으로 회전하여 전륜 조향실린더(12)의 한쪽 유입구에 유압이 가해지게 되는 반면, 입력축의 회전이 반시계방향이면 드롭아암(15)은 시계방향으로 회전하여 전륜 조향실린더(12)의 반대쪽 유입구에 유압이 가해지게 된다.2 is a hydraulic circuit diagram of a conventional front wheel steering apparatus, which includes a gear box 11, a drop arm 15, a front wheel steering cylinder 12, a front wheel steering pump 13, and a front wheel steering oil tank 14. The drop according to the rotation is transmitted to the input shaft (not shown) by the steering wheel operation of the driver in the state that the hydraulic pressure formed by the front wheel steering pump 13 is transmitted to the gear box (11). The arm 15 is rotated and the steering force is increased by the front wheel steering cylinder 12 while steering is performed according to the rotation direction. When the rotation of the input shaft is clockwise, the drop arm 15 is rotated counterclockwise to rotate the front wheel. While hydraulic pressure is applied to one inlet of the steering cylinder 12, when the rotation of the input shaft is counterclockwise, the drop arm 15 is rotated clockwise to apply hydraulic pressure to the inlet opposite to the front wheel steering cylinder 12. .

또한, 도 3은 종래 후륜 조향장치의 유압회로도로서, 이는 방향전환 솔레노이드밸브(21)와, 후륜 조향실린더(22), 후륜 조향펌프(23) 및, 후륜 조향오일탱크(24)를 구비하는 바, 상기 후륜 조향펌프(23)로 형성된 유압이 방향전환 솔레노이드밸브(21)에 전달된 상태에서 운전자의 스위치조작에 따라 이 방향전환 솔레노이드밸브(21)로부터의 유압이 후륜 조향실린더(22)에 전달되어서, 상기 조향장치들에 의해 차량이 게걸음 주행(모든 전후륜이 좌우 동일한 방향으로 약 20˚선회된 상태에서의 주행) 및 최소반경의 회전을 할 수 있도록 되어 있다.3 is a hydraulic circuit diagram of a conventional rear wheel steering device, which includes a direction switching solenoid valve 21, a rear wheel steering cylinder 22, a rear wheel steering pump 23, and a rear wheel steering oil tank 24. In the state where the hydraulic pressure formed by the rear wheel steering pump 23 is transmitted to the direction switching solenoid valve 21, the hydraulic pressure from the direction switching solenoid valve 21 is transmitted to the rear wheel steering cylinder 22 according to the switch operation of the driver. Thus, the steering devices enable the vehicle to make a gait running (traveling with all front and rear wheels turning about 20 ° in the same direction left and right) and rotating the minimum radius.

그러나, 전술한 바와 같이 종래 전륜과 후륜 조향장치가 기계적으로 연동되는 결합은 대형장비나 고가의 차량에 사용되는데 많은 수의 부품이 필요하게 되어 제조단가가 증가되는 반면, 저가의 차량에는 전륜과 후륜의 조향장치가 독립적으로 설치되는데 운전자의 조작이 번거롭고 불편한 문제점이 있었다.However, as mentioned above, the combination of the conventional front wheel and rear wheel steering system mechanically interlocked is used in large equipment or expensive vehicles, and a large number of parts are required, thereby increasing the manufacturing cost. Steering device is installed independently, there was a troublesome and inconvenient operation of the driver.

이에 본 고안은 상기와 같은 문제점을 감안해서 안출된 것으로, 종래 전륜 조향장치의 기어박스와 전륜 조향실린더 사이의 유압라인과 후륜 조향장치의 방향전환 솔레노이드밸브와 후륜 조향실린더 사이의 유압라인을 연결하는 방향전환 연동밸브를 추가로 설치하여서 전후륜 조향이 연동될 수 있는 조작이 간편하고 저가인 전후륜 조향장치를 제공함에 그 목적이 있다.The present invention was conceived in view of the above problems, and the hydraulic line connecting the hydraulic line between the gearbox and the front wheel steering cylinder of the conventional front steering device and the direction switching solenoid valve of the rear steering device and the rear steering cylinder. It is an object of the present invention to provide an easy and inexpensive front and rear wheel steering device in which front and rear wheel steering can be linked by additionally installing a direction switching interlock valve.

도 1은 본 고안에 따른 전후륜 조향장치의 유압회로도이고,1 is a hydraulic circuit diagram of the front and rear wheel steering apparatus according to the present invention,

도 2는 종래 전륜 조향장치의 유압회로도,2 is a hydraulic circuit diagram of a conventional front wheel steering apparatus;

도 3은 종래 후륜 조향장치의 유압회로도이다.3 is a hydraulic circuit diagram of a conventional rear wheel steering device.

11 : 기어박스 12 : 전륜 조향실린더11: gearbox 12: front wheel steering cylinder

13 : 전륜 조향펌프 14 : 전륜 조향오일탱크13: Front wheel steering pump 14: Front wheel steering oil tank

15 : 드롭아암 21 : 방향전환 솔레노이드밸브15: Drop Arm 21: Directional Solenoid Valve

22 : 후륜 조향실린더 23 : 후륜 조향펌프22: rear wheel steering cylinder 23: rear wheel steering pump

24 : 후륜 조향오일탱크 25 : 방향전환 연동밸브24: rear wheel steering oil tank 25: direction change interlock valve

상기와 같은 목적을 달성하기 위한 본 고안은 기어박스와, 드롭 아암, 전륜 조향실린더, 전륜 조향펌프 및, 전륜 조향오일탱크를 구비한 전륜 조향장치와, 방향전환 솔레노이드밸브와, 후륜 조향실린더, 후륜 조향펌프 및, 후륜 조향오일탱크를 구비한 후륜 조향장치를 갖춘 전후륜 조향장치에 있어서, 상기 전륜 조향장치의 기어박스와 전륜 조향실린더 사이의 유압라인과 상기 후륜 조향장치의 방향전환 솔레노이드밸브와 후륜 조향실린더 사이의 유압라인을 연결하는 방향전환 연동밸브를 추가로 구비하는 구조로 되어 있다.The present invention for achieving the above object is a front wheel steering device having a gear box, a drop arm, a front wheel steering cylinder, a front wheel steering pump, and a front wheel steering oil tank, a directional solenoid valve, a rear steering cylinder, a rear wheel A front and rear wheel steering device having a steering pump and a rear wheel steering device having a rear wheel steering oil tank, comprising: a hydraulic line between the gear box of the front wheel steering device and the front wheel steering cylinder and a directional solenoid valve and a rear wheel of the rear wheel steering device; It is structured to further include a direction change peristaltic valve connecting the hydraulic line between the steering cylinder.

이하, 본 고안을 예시된 첨부도면을 참조로 하여 상세히 설명하는 바, 도면에서 동일한 구성부품에는 동일한 참조부호를 부여한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings exemplified. Like reference numerals refer to like elements throughout the drawings.

도 1은 본 고안에 따른 전후륜 조향장치의 유압회로도로서, 이 장치는 기어박스(11)와, 드롭 아암(15), 전륜 조향실린더(12), 전륜 조향펌프(13) 및, 전륜 조향오일탱크(14)를 구비하는 전륜 조향장치와; 방향전환 솔레노이드밸브(21)와, 후륜 조향실린더(22), 후륜 조향펌프(23) 및, 후륜 조향오일탱크(24)를 구비하는 후륜 조향장치 및; 상기 전륜 조향장치의 기어박스(11)와 전륜 조향실린더(12) 사이의 유압라인과 상기 후륜 조향장치의 방향전환 솔레노이드밸브(21)와 후륜 조향실린더(22) 사이의 유압라인을 연결하는 방향전환 연동밸브(25)로 이루어져 있다.1 is a hydraulic circuit diagram of a front and rear wheel steering apparatus according to the present invention, which includes a gear box 11, a drop arm 15, a front wheel steering cylinder 12, a front wheel steering pump 13, and a front wheel steering oil. A front wheel steering apparatus having a tank 14; A rear wheel steering device including a direction switching solenoid valve 21, a rear wheel steering cylinder 22, a rear wheel steering pump 23, and a rear wheel steering oil tank 24; Hydraulic direction switching between the gear box 11 and the front wheel steering cylinder 12 of the front wheel steering device and the hydraulic line between the direction switching solenoid valve 21 and the rear wheel steering cylinder 22 of the rear wheel steering device. It consists of a peristaltic valve 25.

따라서, 상기 전륜 조향펌프(13)로 형성된 유압이 기어박스(11)에 전달된 상태에서 운전자의 핸들조작에 의해 입력축(도시되지 않음)에 전달되는 회전에 따라 상기 드롭아암(15)을 회전시키는데, 상기 입력축의 회전방향의 반대방향으로 드롭아암(15)이 회전되면서 전륜 조향실린더(12)의 둘 중의 한쪽 유입구에 유압이 가해지게 되고 조향력을 증대시켜서 전륜 조향장치의 조향이 이루어지도록 되어 있다.Accordingly, the drop arm 15 is rotated according to the rotation transmitted to the input shaft (not shown) by the driver's steering wheel in the state where the hydraulic pressure formed by the front wheel steering pump 13 is transmitted to the gear box 11. As the drop arm 15 is rotated in the direction opposite to the rotational direction of the input shaft, hydraulic pressure is applied to one of the inlets of the front wheel steering cylinder 12 and the steering force is increased to increase the steering force.

이때, 상기 방향전환 연동밸브(25)에서는 유압이 가해진 전륜 조향실린더(12)의 한쪽 유입구와 연결된 유압라인을 따라 이 방향전환 연동밸브(25)내에 설치된 한쪽 스프링에 압력이 가해져 중립에 있던 방향전환 연동밸브(25)의 유로를 변경시킬 수 있게 되고, 이에 따라 상기 후륜 조향펌프(23)에 의해 형성된 유압이 방향전환 솔레노이드밸브(21)를 거쳐 후륜 조향실린더(22)에 전달되어서, 전륜 조향장치와 더불어 후륜 조향장치의 조향이 이루어진다.At this time, in the direction change interlock valve 25, pressure is applied to one of the springs installed in the direction change interlock valve 25 along a hydraulic line connected to one inlet of the front wheel steering cylinder 12 to which hydraulic pressure is applied. It is possible to change the flow path of the peristaltic valve 25, so that the hydraulic pressure generated by the rear wheel steering pump 23 is transmitted to the rear wheel steering cylinder 22 via the direction switching solenoid valve 21, the front wheel steering device In addition, steering of the rear wheel steering device is performed.

한편, 통상적으로 상기 방향전환 솔레노이드밸브(21)는 최소반경의 회전모드로 설정됨에 따라 전륜 조향장치와 후륜 조향장치의 선회방향이 반대방향이 되도록 작동되어서, 결과적으로 전륜이 좌측으로 선회되면 후륜은 우측으로 선회되고, 전륜이 우측으로 선회되면 후륜은 좌측으로 선회되는 반면, 운전자의 스위치조작에 따라 이 방향전환 솔레노이드밸브(21)를 게걸음 주행모드로 변환시키면 전륜 조향장치와 후륜 조향장치가 동일한 방향으로 약 20˚정도로 선회되어서, 전륜이 좌측이면 후륜도 좌측으로 또는 전륜이 우측이면 후륜도 우측으로 선회될 수 있도록 되어 있다.On the other hand, in general, the direction switching solenoid valve 21 is operated so that the turning directions of the front wheel steering device and the rear wheel steering device are reversed according to the rotation mode of the minimum radius, and as a result, the rear wheel is turned to the left. When the wheel is turned to the right and the front wheel is turned to the right, the rear wheel is turned to the left, while the front wheel steering device and the rear wheel steering device are in the same direction when the direction switching solenoid valve 21 is changed to the walking mode according to the driver's switch operation. The rear wheel is also turned to the left if the front wheel is left, or the rear wheel is to the right if the front wheel is the right.

이상 설명한 바와 같이 본 고안에 의하면, 종래 전륜 조향장치 및 후륜 조향장치와 함께 방향전환 연동밸브를 추가로 설치하여 전후륜의 조향조작이 간편하고 저가인 전후륜 조향장치를 제공하게 됨으로써 궁극적으로 이를 장착한 차량의 제조단가의 절감과 이미지 제고에 기여할 수 있는 효과가 있게 된다.As described above, according to the present invention, the front wheel steering device and the rear wheel steering device are additionally installed, thereby providing a front and rear wheel steering device in which steering wheel steering is simple and inexpensive by additionally installing a direction change interlock valve. There is an effect that can contribute to a reduction in the manufacturing cost of the vehicle and to improve the image.

Claims (1)

기어박스(11)와, 드롭 아암(15), 전륜 조향실린더(12), 전륜 조향펌프(13) 및, 전륜 조향오일탱크(14)를 구비한 전륜 조향장치와, 방향전환 솔레노이드밸브(21)와, 후륜 조향실린더(22), 후륜 조향펌프(23) 및, 후륜 조향오일탱크(24)를 구비한 후륜 조향장치를 갖춘 전후륜 조향장치에 있어서,Front wheel steering with gear box 11, drop arm 15, front wheel steering cylinder 12, front wheel steering pump 13, and front wheel steering oil tank 14, and directional solenoid valve 21. WHEREIN: In the front and rear wheel steering apparatus provided with the rear wheel steering apparatus provided with the rear wheel steering cylinder 22, the rear wheel steering pump 23, and the rear wheel steering oil tank 24, 상기 전륜 조향장치의 기어박스(11)와 전륜 조향실린더(12) 사이의 유압라인과 상기 후륜 조향장치의 방향전환 솔레노이드밸브(21)와 후륜 조향실린더(22) 사이의 유압라인을 연결하는 방향전환 연동밸브(25)를 구비하는 바, 이 방향전환 연동밸브(25)가 전륜 조향실린더(12)에 가해진 유압에 따라 유로를 변경시켜서, 상기 후륜 조향펌프(23)에 의해 형성된 유압이 방향전환 솔레노이드밸브(21)를 거쳐 후륜 조향실린더(22)에 전달되는 것을 특징으로 하는 전후륜 조향장치.Hydraulic direction switching between the gear box 11 and the front wheel steering cylinder 12 of the front wheel steering device and the hydraulic line between the direction switching solenoid valve 21 and the rear wheel steering cylinder 22 of the rear wheel steering device. A peristaltic valve 25 is provided, which changes the flow path according to the hydraulic pressure applied to the front wheel steering cylinder 12 so that the hydraulic pressure formed by the rear wheel steering pump 23 is changed to the solenoid. Front and rear wheel steering device characterized in that the transmission to the rear wheel steering cylinder 22 via the valve (21).
KR2019980027208U 1998-12-29 1998-12-29 Front and rear wheel steering KR20000013940U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019980027208U KR20000013940U (en) 1998-12-29 1998-12-29 Front and rear wheel steering

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Application Number Priority Date Filing Date Title
KR2019980027208U KR20000013940U (en) 1998-12-29 1998-12-29 Front and rear wheel steering

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KR20000013940U true KR20000013940U (en) 2000-07-15

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KR2019980027208U KR20000013940U (en) 1998-12-29 1998-12-29 Front and rear wheel steering

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160061637A (en) * 2014-11-24 2016-06-01 현대자동차주식회사 Electronic active rear wheel steering system and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160061637A (en) * 2014-11-24 2016-06-01 현대자동차주식회사 Electronic active rear wheel steering system and control method thereof

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