KR960004187Y1 - Hydraulic circuit apparatus of wheel type excavator - Google Patents
Hydraulic circuit apparatus of wheel type excavator Download PDFInfo
- Publication number
- KR960004187Y1 KR960004187Y1 KR92023964U KR920023964U KR960004187Y1 KR 960004187 Y1 KR960004187 Y1 KR 960004187Y1 KR 92023964 U KR92023964 U KR 92023964U KR 920023964 U KR920023964 U KR 920023964U KR 960004187 Y1 KR960004187 Y1 KR 960004187Y1
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- KR
- South Korea
- Prior art keywords
- spool
- pump
- passage
- wheel type
- type excavator
- Prior art date
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Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래 휠 타입 굴삭기의 주행장치 회로도.1 is a circuit diagram of a traveling device of a conventional wheel type excavator.
제2도는 본 고안에 의한 휠타입 굴삭기의 주행장치 회로도.2 is a circuit diagram of a traveling device of a wheeled excavator according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 주행모터 스풀 2 : 주행모터1: drive motor spool 2: drive motor
4 : 로직밸브 6 : 바이패스 통로4: Logic Valve 6: Bypass Path
9 : 합류통로 P1: 제1모터9: confluence passage P 1 : 1st motor
P2: 제2모터P 2 : 2nd motor
본 고안은 휠타입 굴삭기의 주행장치에 있어서, 굴삭기가 작업은 하지 않고 주행만을 할 경우 작업장치를 위한 펌프의 토출유량을 주행을 위한 펌프의 토출유량과 합류되도록 하여 주행성능을 향상시키도록한 휠타입 굴삭기의 주행장치에 관한 것이다.According to the present invention, in the traveling device of a wheel type excavator, when the excavator does not work and only travels, the wheel discharge flow rate of the pump for the work device is combined with the discharge flow rate of the pump for travel to improve the driving performance. It relates to a traveling device of the type excavator.
좀더 구체적으로는 기존의 주행제어 밸브의 스풀에 작업장치 펌프의 토출유량을 개폐하는 기능을 추가하여 주행을 하지 않을 때에는 상기 펌프의 토출유량을 탱크로 귀환되도록 하고, 주행을 할 경우에는 주행모터로 오일이 유입되도록 한 것이다.More specifically, the function of opening and closing the discharge flow rate of the work device pump is added to the spool of the existing travel control valve so that the discharge flow rate of the pump is returned to the tank when the vehicle is not running, and the driving motor is used when driving. The oil was introduced.
종래의 중장비 주행시스템은, 제1도에 도시한 바아 같이 유량공급을 하나의 펌프(P2)만으로 또 섹션(Section)의 스풀(1)만으로 주행모터(2)를 구동하는 시스템을 채택함에 따라, 주행시 여러가지 문제점 즉, 출발에서 최고 주행속도에 이르는 시간(가속시간)이 길고, 습지와 같은 특정지면에서 탈출 능력이 떨어지는 점과 주행모터에 장시간 고압이 작용하며(특히 경사지를 오를 경우) 경사지를 내려갈 경우 제동력이 떨어져 주행을 많이 하는 장비는 주행모타의 내구수명 저하와 고장 발생률이 증가하는 단점이 있다. 이의 개선을 위하여 2개의 스풀(2개의 펌프)방식을 적용하면 상기 문제점은 해결되나, 원가가 상승하고 배관이 복잡해지므로 정비 및 조립성이 나빠진다. 또한 예비(option)용의 스풀의 여유가 없어진다.As shown in FIG. 1, the conventional heavy-duty traveling system adopts a system for driving the traveling motor 2 by supplying only one pump P 2 and only the spool 1 of a section as shown in FIG. , Various problems in driving, that is, the time from the start to the maximum driving speed (acceleration time) is long, and the escape ability is poor on a specific surface such as a wetland, and high pressure is applied to the driving motor for a long time (especially when climbing a slope) The equipment that runs a lot because of the low braking force has a disadvantage of lowering the durability of the driving motor and increasing the failure rate. Applying the two spools (two pumps) method for the improvement of this problem is solved, but the cost rises and the piping is complicated, the maintenance and assembly is poor. In addition, there is no room for a spool for an option.
따라서, 본 고안은 상기와 같은 제반 문제점을 제거하기 위하여 안출된 것으로 M.C.V(Multipul Control Valve)의 구조가 주행 스풀의 작동에 의해 하나의 스풀만으로 펌프(P1)와 펌프(P2), 두 펌프의 유량을 동시에 사용가능한 합류기능이 이루어질 수 있는 M.C.V. 구성으로 주행성능 향상과 콤팩트(Compact)화, 원가절감, 장비조립 및 정비성 향상등을 할 수 있도록 하는데 목적이 있다.Therefore, the present invention was devised to eliminate the above problems, and the pump (P 1 ) and the pump (P 2 ), which have only one spool by the operation of the traveling spool, have a structure of the MCV (Multipul Control Valve). The purpose is to improve the running performance, compactness, cost reduction, assembly and maintenance of the equipment with the MCV configuration, which can be used at the same time.
상기 목적을 달성하기 위한 본 고안의 구성을 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다. 제2도에 도시한 바아 같이 제1펌프(P1)에는 각 작업장치 스풀(3) 및 로직밸브(4)가 연결되고, 제2펌프(P2)에는 작업장치 스풀(5) 및 주행모터 스풀(1)을 연결하여 스윙모터(2)를 작동하도록 된 휠타입 굴삭기의 주행장치에 있어서 상기 주행모터 스풀(1)의 일측에 제1펌프(P1)의 토출유량을 제어하는 통로를 설치하여, 상기 로직밸브(4)에 연결하여 바이패스 통로(6)를 형성하고, 상기 로직밸브(4)를 통과 하기전의 유로(7)와 주행모터 스풀(1)의 통로(8)를 연결하여 공급통로(9)를 형성한 구조로 된 것이다.Referring to the configuration of the present invention for achieving the above object in detail based on the accompanying drawings as follows. A first pump, as the bar shown in Figure 2 (P 1) has been connected to the respective working device, a spool 3 and the logic valve 4, a second pump (P 2), the working device spool 5 and the driving motor In the traveling device of a wheel type excavator which is connected to the spool 1 to operate the swing motor 2, a passage for controlling the discharge flow rate of the first pump P 1 is installed on one side of the traveling motor spool 1. By connecting to the logic valve (4) to form a bypass passage (6), connecting the passage (8) of the flow path (7) and the driving motor spool (1) before passing through the logic valve (4) The supply passage 9 is formed.
상기와 같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.장비운전자가 주행 페달을 밟으면 주행모터 스풀(1)의 파일롯트 유로 (a3)로 압력이 전달되어 주행 모터스풀(1)은 오른쪽으로 이동하게되고, 제2펌프(P2)로 부터 토출된 작동유는 오일통로(A)로 공급되며, 제1펌프(P1) 합류 바이패스(6) 통로는 차단되면서 압력이 상승하게 되여 각 작업장치 스풀(3)의 상단에 위치한 로직밸브(4)의 포펫(Poppet)을 밀게되어 제1펌프(P1)로 부터 토출되어 각 작업장치 스풀(3)측으로 공급되는 작동유를 로직밸브(4)전의 합류통로를 따라 3련측의 상단의 주행 모터스풀(1)전의 공급통로(9)로 합류가 되어, 오일통로(A)로 유량을 공급하게 되므로써 주행모터(2)의 필요한 유량이 공급되므로 주행모터(2)는 구동된다. (이때 제1펌프(P1)와 펌프(P2)의 유량이 합류에 의한 공급유량이 증가한다.) 따라서 종래의 방식에서 주행모터가 최소유랑(Displacement)로 설정되어 작동하게 될때의 고압·저유량제어에 따른 과부하현상, 고장 발생율 증가, 또는 발진가속성 저하등의 단점을 개선함은 물론 2개의 스풀 방식에서의 2스풀 사용에 따른 원가상승을 줄이고 배관구성이 간단해지므로서 손쉽게 선택스풀(Option Spool)을 사용할 수 있게 된다.Referring to the operation and effect of the present invention configured as described above is as follows. When the equipment driver presses the driving pedal pressure is transmitted to the pilot flow path (a3) of the driving motor spool (1), the driving motor spool (1) to the right The moving oil discharged from the second pump (P 2 ) is supplied to the oil passage (A), and the pressure is increased while the passage of the first pump (P 1 ) joining bypass (6) is blocked so that each operation The poppet of the logic valve 4 located at the top of the device spool 3 is pushed to discharge the hydraulic oil discharged from the first pump P 1 and supplied to the work device spool 3 to the logic valve 4. As the flow path is supplied to the supply passage 9 before the traveling motor spool 1 at the upper end of the three sides along the previous confluence passage, the flow rate is supplied to the oil passage A so that the required flow rate of the traveling motor 2 is supplied. The motor 2 is driven. (At this time, the supply flow rate is increased by the flow rate of the first pump P 1 and the pump P 2 being merged.) Therefore, the high pressure when the driving motor is set to the minimum displacement and operated in the conventional manner. It not only improves the disadvantages such as overload phenomenon due to low flow control, increases the failure rate, or decreases the oscillation acceleration, but also reduces the cost increase due to the use of two spools in the two spool methods, and the pipe configuration is simplified, making it easier to select the spool ( Option Spool is available.
결론적으로 한 스풀 사용의 장점과 2 스풀 사용의 장점을 모두 살린 내부 합류방식으로 주행모타에 무리하게 가해지고 과부하 조건의 완화를 실현시켜 내구수명 증가와 경사지 또는 험지등의 주행성능을 향상시킨 스풀(M.C.V)구조인 것이다.In conclusion, the spool that is applied to the driving motor unduly by the internal joining method that utilizes the advantages of using one spool and the use of two spools, and realizes the reduction of overload conditions, which increases durability life and improves the driving performance of slopes or rough spots. MCV) structure.
상기와 같은 본 고안은 M.C.V. SIZE가 Compact해지고, 주행에 필요한 유량을 간단한 구조로서 충분히 공급 가능하며, 외부 배관이 간단하여 조립정비성이 좋아지고, 주행성능이 개선되어 주행모타 내구성 및 경사지, 험지주행시 발생되는 문제점(Trouble)이 해결되며, 주행시 작동압이 기존보다 60kg/㎠ 이상 낮아지므로 유압부품의 내구수명이 향상되는 등의 효과가 있는 것이다.The present invention as described above is M.C.V. The size is compact, and the flow rate required for running can be supplied with a simple structure, and the external piping is simple, the assembly and maintenance is improved, and the driving performance is improved, which causes problems in running motor durability, slope, and rough driving. It is to be solved, the working pressure is lowered by more than 60kg / ㎠ more than the existing has the effect of improving the durability life of hydraulic components.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR92023964U KR960004187Y1 (en) | 1992-11-30 | 1992-11-30 | Hydraulic circuit apparatus of wheel type excavator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR92023964U KR960004187Y1 (en) | 1992-11-30 | 1992-11-30 | Hydraulic circuit apparatus of wheel type excavator |
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KR940012727U KR940012727U (en) | 1994-06-22 |
KR960004187Y1 true KR960004187Y1 (en) | 1996-05-22 |
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KR92023964U KR960004187Y1 (en) | 1992-11-30 | 1992-11-30 | Hydraulic circuit apparatus of wheel type excavator |
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KR (1) | KR960004187Y1 (en) |
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1992
- 1992-11-30 KR KR92023964U patent/KR960004187Y1/en not_active IP Right Cessation
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KR940012727U (en) | 1994-06-22 |
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