KR20100063939A - Skid steer loader flow summation device - Google Patents

Skid steer loader flow summation device Download PDF

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KR20100063939A
KR20100063939A KR1020080122318A KR20080122318A KR20100063939A KR 20100063939 A KR20100063939 A KR 20100063939A KR 1020080122318 A KR1020080122318 A KR 1020080122318A KR 20080122318 A KR20080122318 A KR 20080122318A KR 20100063939 A KR20100063939 A KR 20100063939A
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South Korea
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valve
hydraulic
pilot
hydraulic pump
flow
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KR1020080122318A
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Korean (ko)
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KR101299784B1 (en
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심강준
윤종현
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현대중공업 주식회사
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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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: A skid loader flow summation system is provided to perform a task by attaching a special work tool by dividing a bucket from the bottom of a skid loader. CONSTITUTION: A skid loader flow summation system comprises a water flow join valve(30). The water flow join valve comprises a first pilot direction valve(32), a second pilot direction valve(33), a solenoid valve(31), and a relief valve(34). The first pilot direction valve is installed on the supply oil furnace, and the supply oil furnace connects. The special working device by combined with the flows of a second hydraulic pump(11) and a control valve(20). The first pilot direction valve is installed on the returning oil furnace, and the returning oil furnace connects. The solenoid valve switches in order that the first and the second pilot direction valve is opened or closed each other to opposite direction. The relief valve comprises a relief valve controlling the discharged fluid pressure in a first and a second hydraulic pump(10).

Description

스키드로더 유량 합류 장치{Skid steer loader flow summation device}Skid loader loader flow summation device

본 발명은 스키드로더 유량 합류 장치에 관한 것으로, 스키드로더의 붐에 장착된 버킷을 분리하여 특수한 작업장치를 부착할 경우 기존의 버킷작동보다 많은 유량이 요구됨으로써 별도의 유압펌프를 구비하여 기존의 유압펌프와 합류시켜 원하는 작업을 수행할 수 있도록 하는 스키드로더 유량 합류장치에 관한 것이다.The present invention relates to a skid loader flow confluence device, and when the bucket is mounted on the skid loader's boom to attach a special work device is required to flow more than the existing bucket operation to provide a separate hydraulic pump to provide a conventional hydraulic The present invention relates to a skid loader flow confluence device that can be combined with a pump to perform a desired work.

스키드로더는 도 1 에서와 같이 기본적으로 붐(60)에 버킷(70)이 장착되는 구조로서, 붐 실린더(61)를 신장 및 수축하여 상하 위치를 제어 및 버킷실린더(71)를 신장 및 수축하여 버킷(70)을 작동하여 흙, 모래, 건축자재 등의 작업물을 이동하거나 상차하는 장비이다.The skid steer loader is basically a structure in which the bucket 70 is mounted on the boom 60, as shown in FIG. 1. The skid steer loader expands and contracts the boom cylinder 61 to control the vertical position and expands and contracts the bucket cylinder 71. By operating the bucket 70 is a device for moving or loading the work, such as soil, sand, building materials.

이와 더불어 상기 붐(60)에서 버킷(70)을 분리한 다음 도 2 에서와 같이 청소용브러쉬, 파쇄용 브레커 등의 각종 특수한 작업에 맞는 특수작업장치(50)를 부착하여 건설현장 또는 농장 등에서 사용하고 있다.In addition, after separating the bucket 70 from the boom 60, as shown in Figure 2 attached to a special work device for a variety of special operations, such as cleaning brushes, crushing breakers, such as used in construction sites or farms have.

그러나 상기와 같은 특수작업장치를 구동시키기 위한 유압장치의 필요 유량이 기존의 버킷작동 보다 많은 유량이 요구되어 엔진의 동력소모가 증가되는 문제 점이 있다.However, there is a problem in that the required flow rate of the hydraulic device for driving the special work device as described above requires more flow rate than the existing bucket operation, thereby increasing the power consumption of the engine.

상기와 같은 문제점을 해결하기 위하여 버킷을 구동하기 위한 유압펌프 이외에 별도로 특수작업장치를 구동하기 위한 유압펌프를 더 설치하여 작업을 수행하였다.In order to solve the above problems, in addition to the hydraulic pump for driving the bucket, a separate hydraulic pump for driving a special work device was performed.

그러나 상기와 같이 각각의 유압펌프가 별도로 작동할 경우에는 작업효율이 떨어지게 되고 엔진의 효율도 저하되는 문제점이 있다.However, when each hydraulic pump is operated separately as described above, there is a problem that the work efficiency is lowered and the efficiency of the engine is also reduced.

상기와 같은 문제점을 해결하기 위한 본 발명의 목적은, 스키드로더의 붐에 장착된 버킷을 분리하여 특수한 작업장치를 부착할 경우 기존의 버킷작동보다 많은 유량이 요구됨으로써 버킷을 구동하는 유압펌프와 특수작업장치를 구동하는 유압펌프의 작동유를 합류시켜 원하는 작업을 수행할 수 있도록 하는 스키드로더 유량 합류장치를 제공함에 있다.An object of the present invention for solving the above problems, when attaching a special work device by detaching the bucket mounted on the boom of the skid loader, a hydraulic pump for driving the bucket by special flow rate than the conventional bucket operation is required It is to provide a skidloader flow rate confluence device for joining the hydraulic oil of the hydraulic pump driving the work device to perform the desired work.

상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명은,The present invention to achieve the object as described above and to perform the problem for eliminating the conventional drawbacks,

제1유압펌프 및 제2유압펌프와, 상기 제1유압펌프에서 토출되는 작동유를 통해 붐실린더와 버킷실린더를 작동시키는 컨트롤밸브와, 상기 컨트롤밸브 및 제2유압펌프와 연결되어 제1,2유압펌프에서 토출되는 작동유를 유압탱크로 복귀시키거나 또는 합류시켜 특수작업장치를 작동시켜주는 유량합류밸브를 포함하여 구성되는 스키드로더 유량합류장치에 있어서,A first hydraulic pump and a second hydraulic pump, a control valve for operating the boom cylinder and the bucket cylinder through the hydraulic oil discharged from the first hydraulic pump, and the first and second hydraulic pumps connected to the control valve and the second hydraulic pump. In the skid loader flow confluence device comprising a flow confluence valve for operating the special work device by returning or joining the hydraulic oil discharged from the pump to the hydraulic tank,

상기 컨트롤밸브 및 제2유압펌프의 유로가 합류되어 특수작업장치로 연결되도록 구성되는 공급유로상에 설치되어 절환되는 제1파일럿 방향밸브;A first pilot directional valve installed and switched on a supply flow path configured to join the flow paths of the control valve and the second hydraulic pump to be connected to a special work device;

상기 컨트롤밸브 및 제2유압펌프의 유로가 합류되어 유압탱크로 연결되도록 구성되는 복귀유로상에 설치되어 절환되는 제2파일럿 방향밸브;A second pilot direction valve installed and switched on a return flow path configured to join the flow paths of the control valve and the second hydraulic pump to be connected to the hydraulic tank;

상기 제1,2파일럿방향밸브가 서로 반대방향으로 개방되거나 차단되도록 절환시켜주는 솔레노이드밸브;A solenoid valve for switching the first and second pilot direction valves to be opened or closed in opposite directions;

상기 제1,2유압펌프에서 토출되는 유압을 제어하는 릴리프밸브;를 포함하도록 구성되어,And relief valves for controlling hydraulic pressure discharged from the first and second hydraulic pumps.

솔레노이드밸브가 오프될 경우 제1파일럿 방향밸브가 차단되고 제2파일럿 방향밸브가 개방되어 작동유가 유압탱크로 복귀되고,When the solenoid valve is off, the first pilot direction valve is blocked and the second pilot direction valve is opened to return the hydraulic oil to the hydraulic tank.

솔레노이드밸브가 온일 경우에는 제1파일럿 방향밸브가 개방되고 제2파일럿 방향밸브가 차단됨으로써 제1,2유압펌프에서 토출된 작동유가 합류되어 특수작업장치로 공급되는 것을 특징으로 한다.When the solenoid valve is on, the first pilot direction valve is opened and the second pilot direction valve is blocked so that the hydraulic oil discharged from the first and second hydraulic pumps is joined and supplied to the special work device.

이상에서 설명한 바와 같이 본 발명에 의하면, 유량합류밸브의 솔레노이드밸브이 온/오프 작동을 통해 제1,2파일럿 방향밸브를 절환시켜 두 펌프의 유량을 합류 및 일반 버킷 작업을 원활하게 수행할 수 있으며, 솔레노이드밸브의 오프시에는 제2유압펌프의 작동유는 바로 유압탱크로 복귀됨으로써 엔진의 동력소모를 절감하는 매우 유용한 발명이다.As described above, according to the present invention, the solenoid valve of the flow confluence valve can switch the first and second pilot directional valves through on / off operation to smoothly perform the confluence of the two pumps and the general bucket operation. When the solenoid valve is turned off, the operating oil of the second hydraulic pump is directly returned to the hydraulic tank, thereby reducing the power consumption of the engine.

이하 본 발명의 실시 예인 구성과 그 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다. 또한 본 발명을 설명함에 있어서, 관련된 공지기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명은 생략한다.Hereinafter, the configuration and the operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

도 3 은 본 발명에 의한 스키드로더의 유량합류장치를 나타낸 유압회로도서, 본 발명은 붐실린더(61)와 버킷실린더(71)를 버킷을 작동할 수 있도록 작동유를 토출해주는 제1유압펌프(10)와, 특수작업장치(50)를 작동시킬 수 있도록 작동유를 토출해주는 제2유압펌프(11)와, 상기 제1유압펌프(10)에서 토출되는 작동유를 통해 붐실린더(61)와 버킷실린더(71)를 작동시키는 컨트롤밸브(20)와, 상기 컨트롤밸브(20) 및 제2유압펌프(11)와 연결되어 제1,2유압펌프(10)(11)에서 토출되는 작동유를 유압탱크(40)로 복귀시키거나 또는 합류시켜 특수작업장치(50)를 작동시켜주는 유량합류밸브(30)를 포함하여 구성된다.3 is a hydraulic circuit diagram showing the flow confluence device of the skid loader according to the present invention, the present invention is the first hydraulic pump 10 for discharging the hydraulic oil to operate the bucket boom cylinder 61 and the bucket cylinder 71 ), The second hydraulic pump 11 for discharging the hydraulic oil to operate the special work device 50, and the boom cylinder 61 and the bucket cylinder (the hydraulic oil discharged from the first hydraulic pump 10). 71 is connected to the control valve 20 for operating the control valve 20 and the second hydraulic pump 11, the hydraulic oil discharged from the first and second hydraulic pumps 10 and 11 hydraulic tank (40) It is configured to include a flow rate confluence valve 30 for operating the special work device 50 by returning or joining.

상기 유량합류밸브(30)은 컨트롤밸브(20)에서 연장되는 유로가 연결되는 P1포트(37a)와, 제2유압펌프(10)에서 연장되는 유로가 연결되는 P2포트(37b)와, 상기 P1,P2포트(37a)(37b)를 통해 유입된 유로가 합류되어 특수작업장치(50)로 연결되도록 구성되는 공급유로(35)상에 설치되어 절환되는 제1파일럿 방향밸브(32)와, 상기 P1,P2포트(37a)(37b)를 통해 유입된 유로가 합류되어 유압탱크(40)로 연결되도록 구성되는 복귀유로(36)상에 설치되어 절환되는 제2파일럿 방향밸브(33)와, 상기 제1,2파일럿방향밸브(32)(33)가 서로 반대방향으로 개방되거나 차단되도록 절환시켜주는 솔레노이드밸브(31)와, 상기 제1,2유압펌프(10)(11)에서 토출되는 유압을 제어하는 릴리프밸브(34)를 포함하도록 구성되어 솔레노이드밸브(31)가 오프될 경우 제1파일럿 방향밸브(32)가 차단되고 제2파일럿 방향밸브(33)가 개방되어 작동유가 유압탱크(40)로 복귀되고, 솔레노이드밸브(10)가 온일 경우에는 제1파일럿 방향밸 브(32)가 개방되고 제2파일럿 방향밸브(33)가 차단됨으로써 제1,2유압펌프(10)(11)에서 토출된 작동유가 합류되어 특수작업장치(50)로 공급되도록 한다. The flow rate confluence valve 30 has a P1 port 37a to which a flow path extending from the control valve 20 is connected, a P2 port 37b to which a flow path extending from the second hydraulic pump 10 is connected, and the P1. And a first pilot directional valve 32 installed and switched on a supply flow path 35 configured to be connected to the special work device 50 by joining flow paths introduced through the P2 ports 37a and 37b, and A second pilot directional valve 33 installed and switched on a return flow passage 36 configured to join the flow paths introduced through the P1 and P2 ports 37a and 37b to be connected to the hydraulic tank 40; Solenoid valve 31 for switching the first and second pilot directional valves (32) and (33) so as to open or shut in opposite directions to each other, and the hydraulic pressure discharged from the first and second hydraulic pumps (10) (11) It is configured to include a relief valve 34 to control when the solenoid valve 31 is off when the first pilot direction valve 32 is blocked and the second pilot When the incense valve 33 is opened and the hydraulic oil is returned to the hydraulic tank 40, when the solenoid valve 10 is on, the first pilot direction valve 32 is opened and the second pilot direction valve 33 is blocked. By doing so, the hydraulic fluid discharged from the first and second hydraulic pumps 10 and 11 are joined to be supplied to the special work device 50.

이하 본 발명에 의한 유량합류장치의 유압회로 작동을 통해 버킷과 특수작업장치의 작동상태를 상세하게 설명한다. Hereinafter, the operation state of the bucket and the special work device through the hydraulic circuit operation of the flow confluence device according to the present invention will be described in detail.

상기 솔레노이드밸브(31)의 코일에 전기가 여자되지 않아 오프 상태일 경우에는 제1파일럿 방향밸브(32)가 차단되고 제2파일럿 방향밸브(33)가 개방된다. When the coil of the solenoid valve 31 is not energized and is in an off state, the first pilot direction valve 32 is blocked and the second pilot direction valve 33 is opened.

이때 제1유압펌프(10)에서 토출되고 컨트롤밸브(20)를 통과하여 유량합류밸브(30)의 P1포트(37a)를 통해 유입된 작동유가 U포트(38)로 이동되는 것이 차단됨으로써 제2파일럿 방향밸브(33)를 통과한 후 T2포트(39)를 통해 유압탱크(40)로 복귀한다.At this time, the hydraulic fluid discharged from the first hydraulic pump 10 and passed through the control valve 20 to flow through the P1 port 37a of the flow rate confluence valve 30 is blocked from moving to the U port 38. After passing through the pilot direction valve 33, it returns to the hydraulic tank 40 through the T2 port 39.

이와 같이 솔레노이드밸브(31)가 오프일 경우에는 제1유압펌프(10)에서 토출되는 작동유에 의해 일반적인 버킷 실린더(71) 및 붐 실린더(61)의 작동을 컨트를밸브(20)를 통하여 수행할 수 있다.As such, when the solenoid valve 31 is off, the general bucket cylinder 71 and the boom cylinder 61 may be operated by the hydraulic fluid discharged from the first hydraulic pump 10. Can be.

또한 제2유압펌프(11)에서 토출되는 작동유는 유량합류밸브(30)의 P2포트(37b)로 들어와 제2파일럿 방향밸브(33)를 통과한 후 T2포트(39)를 통해 유압탱크(40)로 복귀하게 되어 엔진 동력소모를 절감해준다.In addition, the hydraulic oil discharged from the second hydraulic pump 11 enters the P2 port 37b of the flow confluence valve 30, passes through the second pilot direction valve 33, and then the hydraulic tank 40 through the T2 port 39. To reduce the engine power consumption.

한편 솔레노이드밸브(31)의 코일에 전기를 여자하여 온 상태일 경우에는 제1파일럿 방향밸브(32)가 개방되고, 제2파일럿 방향밸브(33)가 차단된다.In the meantime, when the coil of the solenoid valve 31 is energized and turned on, the first pilot direction valve 32 is opened and the second pilot direction valve 33 is blocked.

이때 제1유압펌프(10)에서 토출되고 컨트롤밸브(20)를 통과하여 유량합류밸브(20)의 P1포트(37a)를 통해 유입된 작동유는 T2포트(39)로 이동되는 것이 차단됨으로써 제1파일럿 방향밸브(32)를 통과하게 되고, 제2유압펌프(11)에서 토출된 작동유는 P2포트(37b)로 들어와 제1파일럿 방향밸브(32)를 통과하게 되며, 이렇게 제1파일럿 방향밸브(32)를 통화한 제1,2유압펌프(10)(11)의 작동유는 U포트(38)로 합류하여 배출됨으로써 특수작업장치(50)를 작동시켜 주게 된다.At this time, the hydraulic fluid discharged from the first hydraulic pump 10 and passed through the control valve 20 to flow through the P1 port 37a of the flow confluence valve 20 is blocked from being moved to the T2 port 39. Passing through the pilot directional valve 32, the hydraulic oil discharged from the second hydraulic pump 11 enters the P2 port 37b and passes through the first pilot directional valve 32, thus the first pilot directional valve ( The hydraulic fluid of the first and second hydraulic pumps 10 and 11 which are communicated with the 32 is joined to the U port 38 to be discharged to operate the special work device 50.

이와 같은 본 발명은 유량합류밸브(30)의 솔레노이드밸브(31)를 온/오프 시킴으로써 제1,2유압펌프(10)(11)의 작동유를 합류하여 특수작업장치(50)를 작동하거나, 일반 버킷(70) 작업만을 수행할 수 있도록 하였으며, 일반 버켓(70) 작업시 제2유압펌프(11)의 작동유는 유압탱크(40)로 복귀됨으로써 엔진 동력소모가 절감되는 효과가 있다.Such the present invention by operating the solenoid valve 31 of the flow rate confluence valve 30 on / off to join the operating oil of the first and second hydraulic pump 10, 11 to operate the special work device 50, or Only the bucket 70 operation can be performed, and the working oil of the second hydraulic pump 11 is returned to the hydraulic tank 40 during the operation of the general bucket 70, thereby reducing engine power consumption.

본 발명은 상술한 특정의 바람직한 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

도 1 은 일반적인 스키드로더를 나타낸 예시도,1 is an exemplary view showing a typical skid steer loader,

도 2 는 스키드로더에 다양한 특수작업장치 부착한 상태를 나타낸 예시도,Figure 2 is an exemplary view showing a state attached to the various special work devices to the skid steer loader,

도 3 은 본 발명에 의한 스키드로더의 유량합류장치를 나타낸 유압회로도,3 is a hydraulic circuit diagram showing a flow confluence device of the skid loader according to the present invention;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

(10) : 제1유압펌프 (11) : 제2유압펌프(10): first hydraulic pump (11): second hydraulic pump

(20) : 컨트롤밸브 (30) : 유량합류밸브(20): control valve (30): flow confluence valve

(31) : 솔레노이드밸브 (32) : 제1파일럿 방향밸브(31): Solenoid valve (32): First pilot directional valve

(33) : 제2파일럿방향밸브 (34) : 릴리프밸브(33): 2nd pilot directional valve (34): relief valve

(35) : 공급유로 (36) : 복귀유로35: supply flow path 36: return flow path

(37a) : P1포트 (37b) : P2포트(37a): P1 port (37b): P2 port

(38) : U포트 (39) : T2포트(38): U port (39): T2 port

(40) : 유압탱크 (50) : 퀵커플러(40): hydraulic tank (50): quick coupler

(60) : 붐 (61) : 붐 실린더60: boom 61: boom cylinder

(70) : 버킷 (71) : 버킷 실린더70: bucket 71: bucket cylinder

Claims (1)

제1유압펌프 및 제2유압펌프와, 상기 제1유압펌프에서 토출되는 작동유를 통해 붐실린더와 버킷실린더를 작동시키는 컨트롤밸브와, 상기 컨트롤밸브 및 제2유압펌프와 연결되어 제1,2유압펌프에서 토출되는 작동유를 유압탱크로 복귀시키거나 또는 합류시켜 특수작업장치를 작동시켜주는 유량합류밸브를 포함하여 구성되는 스키드로더 유량합류장치에 있어서,A first hydraulic pump and a second hydraulic pump, a control valve for operating the boom cylinder and the bucket cylinder through the hydraulic oil discharged from the first hydraulic pump, and the first and second hydraulic pumps connected to the control valve and the second hydraulic pump. In the skid loader flow confluence device comprising a flow confluence valve for operating the special work device by returning or joining the hydraulic oil discharged from the pump to the hydraulic tank, 상기 유량합류밸브는, 상기 컨트롤밸브 및 제2유압펌프의 유로가 합류되어 특수작업장치로 연결되도록 구성되는 공급유로상에 설치되어 절환되는 제1파일럿 방향밸브;The flow rate confluence valve may include: a first pilot direction valve installed and switched on a supply flow path configured to join the flow paths of the control valve and the second hydraulic pump to be connected to a special work device; 상기 컨트롤밸브 및 제2유압펌프의 유로가 합류되어 유압탱크로 연결되도록 구성되는 복귀유로상에 설치되어 절환되는 제2파일럿 방향밸브;A second pilot direction valve installed and switched on a return flow path configured to join the flow paths of the control valve and the second hydraulic pump to be connected to the hydraulic tank; 상기 제1,2파일럿방향밸브가 서로 반대방향으로 개방되거나 차단되도록 절환시켜주는 솔레노이드밸브;A solenoid valve for switching the first and second pilot direction valves to be opened or closed in opposite directions; 상기 제1,2유압펌프에서 토출되는 유압을 제어하는 릴리프밸브;를 포함하도록 구성되어,And relief valves for controlling hydraulic pressure discharged from the first and second hydraulic pumps. 솔레노이드밸브가 오프될 경우 제1파일럿 방향밸브가 차단되고 제2파일럿 방향밸브가 개방되어 작동유가 유압탱크로 복귀되고,When the solenoid valve is off, the first pilot direction valve is blocked and the second pilot direction valve is opened to return the hydraulic oil to the hydraulic tank. 솔레노이드밸브가 온일 경우에는 제1파일럿 방향밸브가 개방되고 제2파일럿 방향밸브가 차단됨으로써 제1,2유압펌프에서 토출된 작동유가 합류되어 특수작업장 치로 공급되는 것을 특징으로 하는 스키드로더 유량 합류 장치.When the solenoid valve is on, the first pilot directional valve is opened and the second pilot directional valve is blocked so that the hydraulic oil discharged from the first and second hydraulic pumps are joined to be supplied to the special work equipment.
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WO2015152434A1 (en) * 2014-03-31 2015-10-08 볼보 컨스트럭션 이큅먼트 에이비 Control device for confluence flow rate of working device for construction machinery and control method therefor
CN108978772A (en) * 2018-07-20 2018-12-11 广西柳工机械股份有限公司 Load-sensitive steering hydraulic system and loading machine

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JP3126983B2 (en) * 1991-12-24 2001-01-22 日立建機株式会社 Hydraulic drive for construction machinery
KR100665108B1 (en) * 2002-04-29 2007-01-04 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Hydraulic circuit with boom priority
JP4023740B2 (en) * 2003-11-04 2007-12-19 株式会社小松製作所 Pressure oil energy recovery device
JP4973087B2 (en) * 2006-09-21 2012-07-11 コベルコ建機株式会社 Control device for hydraulic work machine

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Publication number Priority date Publication date Assignee Title
WO2015152434A1 (en) * 2014-03-31 2015-10-08 볼보 컨스트럭션 이큅먼트 에이비 Control device for confluence flow rate of working device for construction machinery and control method therefor
US10119249B2 (en) 2014-03-31 2018-11-06 Volvo Construction Equipment Ab Control device for confluence flow rate of working device for construction machinery and control method therefor
CN108978772A (en) * 2018-07-20 2018-12-11 广西柳工机械股份有限公司 Load-sensitive steering hydraulic system and loading machine
CN108978772B (en) * 2018-07-20 2020-11-20 广西柳工机械股份有限公司 Load-sensitive steering hydraulic system and loader

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