KR940006225Y1 - Travelling control device for wheel type excavator - Google Patents

Travelling control device for wheel type excavator Download PDF

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Publication number
KR940006225Y1
KR940006225Y1 KR2019900018311U KR900018311U KR940006225Y1 KR 940006225 Y1 KR940006225 Y1 KR 940006225Y1 KR 2019900018311 U KR2019900018311 U KR 2019900018311U KR 900018311 U KR900018311 U KR 900018311U KR 940006225 Y1 KR940006225 Y1 KR 940006225Y1
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KR
South Korea
Prior art keywords
driving
pedal
wheel type
control valve
valve
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KR2019900018311U
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Korean (ko)
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KR920009595U (en
Inventor
허태규
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삼성중공업 주식회사
김연수
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Priority to KR2019900018311U priority Critical patent/KR940006225Y1/en
Publication of KR920009595U publication Critical patent/KR920009595U/en
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Publication of KR940006225Y1 publication Critical patent/KR940006225Y1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps

Abstract

내용 없음.No content.

Description

휠타입 중장비의 주행 및 제동장치Driving and braking device for wheel type heavy equipment

제1도는 본 고안에 따른 주행 및 제동장치의 주행시의 유압회로도.1 is a hydraulic circuit diagram of the driving and braking device according to the present invention.

제2도는 본 고안에 따른 주행 및 제동장치의 주행시의 유압회로도.2 is a hydraulic circuit diagram when traveling and traveling of the braking device according to the present invention.

제3도는 본 고안에 따른 주행페달의 스트로크에 대한 압력특성선도.3 is a pressure characteristic diagram for the stroke of the traveling pedal according to the present invention.

제4도는 본 고안에 따른 파일롯트감압밸브의 압력특성선도.4 is a pressure characteristic diagram of a pilot pressure reducing valve according to the present invention.

제5도는 종래 기술에 따른 휠타입 중장비의 주행 및 제동장치의 유압회로도이다.5 is a hydraulic circuit diagram of a traveling and braking device for a wheel type heavy equipment according to the prior art.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 엔진 2, 3 : 제1,2유압펌프1: Engine 2, 3: 1st, 2nd hydraulic pump

4 : 제어밸브 5 : 주행모우터4: control valve 5: driving motor

6 : 주행페달 7 : 솔레노이드밸브6: running pedal 7: solenoid valve

8 : 릴리이프밸브 9 : 축압기8: relief valve 9: accumulator

10 : 파일롯트감압밸브 11 : 브레이크 실린더10: pilot pressure reducing valve 11: brake cylinder

12 : 유량조절밸브 13, 14 : 탱ㅋ트12: flow control valve 13, 14: tank

15 : 스프링15: spring

본 고안은 휠타입 중장비의 주행 및 제동장치에 관한 것으로, 특히 주행페달의 조작만으로도 중장비를 주행시키거나 정지시킬 수 있도록 된 휠타입 중장비의 주행 및 제동장치에 관한 것이다.The present invention relates to a driving and braking device for a wheel type heavy equipment, and more particularly, to a driving and braking device for a wheel type heavy equipment that can run or stop heavy equipment only by operating a driving pedal.

현재 건설공사에 널리 사용되고 있는 휠타입 중장비의 주행 및 제동장치는 제5도에서 도시된 바와같이, 엔진(21)의 출력축에 제1,2유압펌프(22,23)가 직렬연결되어 있고, 상기 제1유압펌프(22)에는 주행모우터용 제어밸브(24)사이에는 솔레노이드밸브(27)가 설치되어 상기 제어밸브(24)의 내부파일롯트압을 조절해주도록 되어 있는 한편, 상기 제2유압펌프(23)에는 토출된 압유를 축압하는 축압기(28)와 설정압력이상의 높은 압력이 걸리는 것을 방지해 주는 릴리이프밸브(29)가 연결되어 있고, 또 상기 축압기(28)에는 브레이크페달(30)을 매개로 브레이크실린더(31)가 연결된 구조로 되어, 운전자가 상기 주행페달(26)을 조작하게 되면 제1유압펌프(22)에서 토출된 압유의 일부는 주행페달(46)을 매개로 상기 솔레노이드밸브(27)를 통해 주행모우터용 제어밸브(24)로 공급되어 페달(26)의 조작양만큼의 유로가 형성되고, 또 나머지 토출압유는 상기 제어밸브(24)를 통해 주행 모우터(25)에 공급되어 주행되게 되며, 이와 반대로 정지시키고자 할 경우에는 조작중인 상기 주행페달(26)에서 발을 떼고 상기 브레이크페달(30)을 조작하게 되면 제2유압펌프(23)에서 토출되어 축압기(28)에 축압된 압유가 브레이크페달(30)을 매개로 브레이크실린더(31)에 공급되어 주행이 정지되게 되어 있다.As shown in FIG. 5, first and second hydraulic pumps 22 and 23 are connected in series to the output shaft of the engine 21 as shown in FIG. 5. The solenoid valve 27 is installed in the first hydraulic pump 22 between the driving motor control valve 24 to adjust the internal pilot pressure of the control valve 24, and the second hydraulic pump An accumulator 28 for accumulating the discharged hydraulic oil and a relief valve 29 for preventing a high pressure above a set pressure are connected to the accumulator 28, and the brake pedal 30 is connected to the accumulator 28. The brake cylinder 31 is connected to each other through the vehicle, and when the driver operates the driving pedal 26, a part of the hydraulic oil discharged from the first hydraulic pump 22 is transferred through the driving pedal 46. The solenoid valve (27) is used to drive the control valve (24) for the traveling motor. As a result, a flow path corresponding to the amount of operation of the pedal 26 is formed, and the remaining discharge pressure oil is supplied to the traveling motor 25 through the control valve 24 to be driven, and on the contrary, to stop the operation. When the foot pedal 26 is being operated and the brake pedal 30 is operated, the hydraulic oil discharged from the second hydraulic pump 23 and accumulated in the accumulator 28 is braked through the brake pedal 30. It is supplied to the cylinder 31, and running is stopped.

즉, 주행을 정지시키고자 할 경우에는 먼저 주행페달의 조작을 멈추고나서 브레이크페달을 조작하도록 되어 있고, 경사지에 정지된 상태에서 주행을 하고자 할 경우에는 주행페달과 브레이크 페달을 동시에 조작해야 하므로 주행 및 제동장치를 조작하는데 따른 번거로움이 수반되면서 오조작시에 안전사고의 문제점이 있었다.In other words, if you want to stop driving, stop the operation of the driving pedal first, and then operate the brake pedal, and if you want to run while stopped on the slope, you must operate the driving pedal and brake pedal at the same time. There was a problem of a safety accident at the time of misoperation with the trouble of operating the braking device.

이에 본 고안은 상기와 같은 제반문제점을 개선하기 위해 안출된 것으로, 주행페달의 조작만으로 정지된 중장비를 주행시키거나, 주행중인 장비를 정지시켜 주행 및 제동의 복합조작에 따른 운전피로를 줄여줌과 더불어 경사지에서도 주행 및 정지가 용이하여 운전조작성능을 향상시키도록된 휠타입 중장비의 주행 및 제동장치를 제공함에 그 목적이 있다.Therefore, the present invention was devised to improve the above-mentioned problems, and to reduce the driving fatigue caused by the complex operation of driving and braking by driving heavy equipment stopped by the operation of the driving pedal, or by stopping the driving equipment. In addition, it is an object of the present invention to provide a traveling and braking device for a wheel type heavy equipment that is easy to drive and stop even on a slope.

상기와 같은 목적을 달성하기 위한 본 고안은, 엔진의 출력측에 제1,2유압펌프가 적렬연결되고, 상기 제1유압펌프에는 제어밸브가 연결된 주행모우터와 주행페달이 병렬연결되며, 또한 상기 제2유압펌프에는 브레이크 실린더가 연결된 축압기가 연결되는 한편, 상기 축압기와 브레이크실린더 사이에 파일롯트감압밸브가 연결됨과 더불어, 이 감압밸브에는 상기 주행 페달을 통해 공급된 압유가 내부파일롯트압으로 작동되도록 유량조절밸브를 매개로 주행행페달과 연결된 구조로 되어, 상기 주행페달을 발등으로 조작하게 되면 상기 브레이크실린더에 공급된 압유가 내부탱크로 드레인되면서 제1유압펌프에 토출되는 압유가 상기 제어밸브를 매개로 주행모우터로 공급되어 주행되는 한편, 상기 주행페달에서 발을 떼게되면 상기 제2유압펌프에서 토출된 압유가 축압기 및 파일롯트감압밸브를 매개로 브레이크실린더로 공급되어 자동적으로 정지되게 됨으로써, 주행페달의 조작만으로도 주행과 제동을 동시에 수행할 수 있어 중장비의 주행 및 제동의 운전조작이 편리하게 되어 있다.The present invention for achieving the above object, the first and second hydraulic pump is connected to the output side of the engine is appropriately connected, the driving motor and the running pedal connected to the control valve is connected to the first hydraulic pump in parallel, The second hydraulic pump is connected to the accumulator connected to the brake cylinder, while a pilot pressure reducing valve is connected between the accumulator and the brake cylinder, and the pressure oil supplied through the traveling pedal is provided with internal pilot pressure. It is structured to be connected to the running pedal through the flow control valve to operate the operation, when the operating pedal is operated by the instep pressure oil supplied to the brake cylinder is drained into the inner tank while the pressure oil discharged to the first hydraulic pump It is supplied to the traveling motor through a control valve and travels, and when the foot is removed from the traveling pedal, the second hydraulic pump is discharged. Since the pressurized oil is supplied to the brake cylinder via the accumulator and the pilot pressure reducing valve, it is automatically stopped, so that the driving and braking can be performed at the same time only by the operation of the driving pedal. have.

이하 본 고안을 첨부된 예시도면에 의하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 고안 휠타입 중장비의 주행 및 제동장치는 제1도에서 도시된 바와같이, 엔진(1)의 출력축에 제1,2유압펌프(2,3)가 각각 직렬연결되고, 상기 제1유압펌프(2)에는 주행모우터용 제어밸브(4)를 매개로 주행모우터(5) 및 주행페달(6)이 병렬연결되며, 또한 이 주행페달(6)에는 솔레노이드밸브(7)과 연결되어 상기 주행모우터용 제어밸브(4)의 내부파일롯트압을 조절해 주도록 되어 있다.As shown in FIG. 1, the traveling and braking device of the wheel-type heavy equipment of the present invention has first and second hydraulic pumps 2 and 3 connected in series to the output shaft of the engine 1, and the first hydraulic pump ( 2) the driving motor 5 and the driving pedal 6 are connected in parallel via the control valve 4 for the driving motor, and the driving pedal 6 is connected to the solenoid valve 7 to drive the driving mower. The internal pilot pressure of the control valve 4 for the rotor is adjusted.

또한 상기 제2유압펌프(3)에는 릴리이프밸브(8)와 축압기(9)가 병렬연결되고, 상기 축압기(9)에는 파일롯트 감압밸브(10)를 매개로 브레이크실린더(11)가 연결되며, 또 이 감압밸브(10)에는 유량조절밸브(12)를 매개로 상기 주행페달(6)이 연결되어 있다.In addition, the relief valve 8 and the accumulator 9 are connected in parallel to the second hydraulic pump 3, and the brake cylinder 11 is connected to the accumulator 9 via a pilot pressure reducing valve 10. The traveling pedal 6 is connected to the pressure reducing valve 10 via a flow control valve 12.

상기와 같은 구조로 된 주행 및 제동장치는 다음과 같이 작동되게 되는데, 먼저 정지된 상태에서 주행하고자 상기 주행페달(6)을 조작하게 되면 제1유압펌프(2)에서 토출된 압유는 주행페달(6)과 상기 주행모우터용 제어밸브(4)로 공급되게 되고, 주행페달(6)로 공급된 압유는 페달(6)에 병렬연결된 유량조절밸브(12)와 솔레노이드밸브(7)로 공급되며, 또한 솔레노이드밸브(7)로 공급된 압유는 상기 제어밸브(4)의 내부파일롯트압으로 작동되어 상기 제어밸브(4)가 열리게 됨으로써, 제어밸브(4)로 공급된 압유가 주행모우터(5)로 공급되어 주행모우터(5)가 작동되는 한편, 주행페달(6)로 공급된 압유는 제3도에서 도시된 바와 같은 압력특성으로 압력이 상승하여 유량조절밸브(12)를 통과한 다음 상기 파일롯트감압밸브(10)의 스푸울을 밀어줌으로써, 축압기(9)를 매개로 브래이크실린더(11)에 공급된 압유는 탱크(13)로 드레인됨으로써 제동이 해제되어 주행되게 된다.The traveling and braking device having the above structure is operated as follows. First, when the driving pedal 6 is operated to travel in a stopped state, the pressure oil discharged from the first hydraulic pump 2 is driven by a driving pedal ( 6) and the driving motor control valve (4), the hydraulic oil supplied to the driving pedal (6) is supplied to the flow control valve 12 and the solenoid valve (7) connected in parallel to the pedal (6), In addition, the hydraulic oil supplied to the solenoid valve 7 is operated by the internal pilot pressure of the control valve 4 to open the control valve 4, so that the hydraulic oil supplied to the control valve 4 is driven by the traveling motor 5. And the driving motor 5 is operated, while the pressure oil supplied to the driving pedal 6 rises in pressure due to the pressure characteristic as shown in FIG. 3 and passes through the flow control valve 12. By pushing the sprue of the pilot pressure reducing valve 10, the accumulator 9 is The pressure oil supplied to the brake cylinder 11 with the opening is drained to the tank 13 to release the braking and run.

한편, 주행상태에서 정지시키고자 할 경우에 상기 주행페달(6)의 조작을 멈추게 되면, 예컨대 발로 조작하게 된 경우에 발을 떼게 되면 제2도에 도시된 바와같이 제1펌프(2)에서 토출되어 주행페달(6)로 공급되는 압유는 주행페달의 탱크(14)로 드레인되게 되어 상기 파일롯트감압밸브(10)의 스푸울을 밀어주기 위해 공급되던 압유는 더 이상 공급되지 않게 됨으로서 스푸울을 밀어주는 힘이 약해지게되고, 이에 반해 감압밸브(10) 스프링(15)의 복원력에 의해 축압기(9)와 브레이크실린더(11)사이에 유로가 형성되게 됨으로써 축압기(9)에서 토출된 압유는 브레이크실린더(11)로 공급되어 주행중인 장비가 정지되게 된다.On the other hand, when the operation of the driving pedal 6 is stopped when the vehicle is to be stopped in the running state, for example, when the foot is released when the foot is operated, as shown in FIG. 2, the first pump 2 discharges it. The pressure oil supplied to the driving pedal 6 is drained to the tank 14 of the driving pedal so that the pressure oil supplied to push the spoof of the pilot pressure reducing valve 10 is no longer supplied. The pushing force is weakened, on the contrary, the hydraulic oil discharged from the accumulator 9 is formed by a flow path formed between the accumulator 9 and the brake cylinder 11 by the restoring force of the spring 15 of the pressure reducing valve 10. Is supplied to the brake cylinder 11 to stop the running equipment.

여기서, 상기 주행페달(6)의 답력정도에 따라 브레이크실린더(11)에 작동유가 선택적으로 공급되도록 해주기 위해 상기 감압밸브(10)의 스프링(15)상수를 결정해 주는바, 예컨대 주행페달(6)을 절반정도 밟을 때까지 브레이크실린더(11)에 작동유가 공급되지 않도록 스프링(15)상수를 결정해주고, 또한 급작제동을 방지하기 위해 상기 파일롯트감압밸브(10)의 압력특성은 제4도에서 도시된 바와같은 압력특성을 갖도록 감압밸브(10)을 선정해 준다.Here, the constant of the spring 15 of the pressure reducing valve 10 is determined in order to selectively supply the hydraulic oil to the brake cylinder 11 according to the degree of pedaling of the running pedal 6, for example, the running pedal 6. In order to prevent the hydraulic fluid from being supplied to the brake cylinder 11 until the user presses halfway), the pressure characteristic of the pilot pressure reducing valve 10 is set in FIG. 4 to prevent sudden braking. The pressure reducing valve 10 is selected to have a pressure characteristic as shown.

이상과 같이 본 고안 휠타입 중장비의 주행 및 제동장치는 주행페달만의, 조작만으로 주행중인 장비를 정지시키거나, 경사지게 정지된 장비를 용이하게 주행시킬 수 있도록 되어 중장비의 주행 및 제동조작이 간단함으로써 운전자의 운전피로감을 줄여도록 되어 있는 한편, 피견인시에는 상기 유량조절밸브(12)를 잠가줌으로써 피견인이 용이한 효과가 있다.As described above, the driving and braking device of the wheel-type heavy equipment of the present invention is capable of stopping the running equipment by the operation of the driving pedal only, or easily driving the equipment that is inclined, so that the driving and braking operation of the heavy equipment is simple. While reducing the driver's fatigue feeling, the towing is effective by locking the flow control valve 12 during the towing.

Claims (2)

엔진(1)의 출력축에 제1,2유압펌프(2,3)가 직렬연결되고, 상기 제1유압펌프 (2)에는 제어밸브(4)가 연결된 주행모우터(5)와 주행페달(6)이 병렬연결되며, 또한 상기 제2유압펌프(3)에는 브레이크실린더(11)와 연결된 축압기(9)가 설치된 휠타입 중장비의 주행 및 제동장치에 있어서, 상기 축압기(9)와 브레이크실린더(11) 사이에 파일롯트감압밸브(10)가 연결되고, 이 감압밸브(10)에는 상기 주행페달(6)을 통해 공급된 압유가 내부파일롯트압으로 작동되도록 유량조절밸브(12)를 매개로 주행페달(6)과 연결된 것을 특징으로 하는 휠타입 중장비의 주행 및 제동장치.First and second hydraulic pumps 2 and 3 are connected in series to the output shaft of the engine 1, and the driving motor 5 and the driving pedal 6 to which the control valve 4 is connected to the first hydraulic pump 2. In the traveling and braking device of a wheel type heavy equipment, in which the second hydraulic pump 3 is connected to the second hydraulic pump 3 and the accumulator 9 connected to the brake cylinder 11, the accumulator 9 and the brake cylinder A pilot pressure reducing valve (10) is connected between (11), and the pressure reducing valve (10) is provided with a flow control valve (12) so that the pressure oil supplied through the traveling pedal (6) is operated at internal pilot pressure. The driving and braking device of a wheel type heavy equipment, characterized in that connected to the road running pedal (6). 제1항에 있어서, 상기 파일롯트감압밸브(10)가 상기 주행페달(6)을 절반정도 조작했을때 밸브(10)에 미치는 유압과 이에 대한 저항력이 일치되는 스프링(15)을 갖춘 것을 특징으로 하는 휠타입 중장비의 주행 및 제동장치.According to claim 1, characterized in that the pilot pressure reducing valve (10) is provided with a spring (15) to match the hydraulic pressure applied to the valve (10) and the resistance thereto when the driving pedal (6) about half of the operation Driving and braking device of wheel type heavy equipment.
KR2019900018311U 1990-11-27 1990-11-27 Travelling control device for wheel type excavator KR940006225Y1 (en)

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KR2019900018311U KR940006225Y1 (en) 1990-11-27 1990-11-27 Travelling control device for wheel type excavator

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Application Number Priority Date Filing Date Title
KR2019900018311U KR940006225Y1 (en) 1990-11-27 1990-11-27 Travelling control device for wheel type excavator

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KR920009595U KR920009595U (en) 1992-06-16
KR940006225Y1 true KR940006225Y1 (en) 1994-09-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160119486A (en) * 2015-04-06 2016-10-14 두산인프라코어 주식회사 Hydraulic brake system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160119486A (en) * 2015-04-06 2016-10-14 두산인프라코어 주식회사 Hydraulic brake system

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