KR940000183Y1 - Oil-pressure control device of wheel type excavator - Google Patents
Oil-pressure control device of wheel type excavator Download PDFInfo
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- KR940000183Y1 KR940000183Y1 KR2019900003930U KR900003930U KR940000183Y1 KR 940000183 Y1 KR940000183 Y1 KR 940000183Y1 KR 2019900003930 U KR2019900003930 U KR 2019900003930U KR 900003930 U KR900003930 U KR 900003930U KR 940000183 Y1 KR940000183 Y1 KR 940000183Y1
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- valve
- hydraulic
- control valve
- driving motor
- driving
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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
- E02F9/2264—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
- E02F9/2285—Pilot-operated systems
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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 본 고안 주제어밸브에 의해 주행모우터를 구동시켜주도록 된 유압회로도.1 is a hydraulic circuit diagram for driving the driving motor by the main control valve of the present invention.
제2도는 종래기술에 따른 유압회로도이다.2 is a hydraulic circuit diagram according to the prior art.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 주모우터 2 : 제1유압펌프1: main motor 2: 1st hydraulic pump
3 : 제1련측 밸브유닛 4 : 주행제어밸브3: first side valve unit 4: travel control valve
5 : 주행모우터 6 : 제2유압펌프5: driving motor 6: second hydraulic pump
7 : 제2련측 밸브유닛 8 : 로직밸브7: 2nd side valve unit 8: Logic valve
9 : 감압밸브 10, 11 : 유압통로9: Pressure reducing valve 10, 11: Hydraulic passage
12 : 드레인통로 13 : 파일럿트파이프12: drain passage 13: pilot pipe
14 : 파일럿트요소14: pilot element
본 고안은 휠타입 중장비 주행장치에 관한 것으로, 특히 주행모우터의 성능을 향상시켜 주행성능이 뛰어나도록 한 휠타입 중장비 주행장치에 관한 것이다.The present invention relates to a wheel-type heavy-duty traveling device, and more particularly to a wheel-type heavy-duty driving device to improve the performance of the driving motor to excellent driving performance.
일반적으로 휠타입굴삭기의 주행모우터는 주제어밸브(Multiple control valve)가 유압펌프로 부터 토출되는 압유를 제어하여 구동시켜지도록 된바, 종래기술에 따른 주제어밸브에는 제2유압펌프로 부터 토출된 압유를 제어하여 주행모우터를 구동시켜주는 주행제어밸브가 구비되고, 이 주행제어밸브는 좌·우측 스푸울의 동작에 의해 상기 제2유압펌프로부터 토출된 압유를 통과시켜 상기 주행모우터를 정방향 또는 역방향으로 구동시켜 주거나 또는 정지시켜주도록 되어있다.In general, the driving motor of the wheel type excavator is to be driven by controlling the hydraulic oil discharged from the hydraulic control pump (multiple control valve), the main control valve according to the prior art controls the hydraulic oil discharged from the second hydraulic pump And a traveling control valve for driving the traveling motor, the traveling control valve passing the hydraulic oil discharged from the second hydraulic pump by the operation of the left and right spoules to move the traveling motor in the forward or reverse direction. It is designed to drive or stop.
그러나 상기 주제어밸브는 제2유압펌프 1개로서 주행모우터를 구동시켜주도록 되어있기 때문에 오르막길이 긴도로를 주행하게 되거나 또는 장시간 주행하게 될 경우에는 주행모우터에 최대부하가 걸리면서 주행모우터의 유압이 고압상태로 되게 되어, 주행모우터에 고장발생률이 증가하여 내구수명이 저하되게 될 뿐만 아니라 시동후 최고 주행속도에 이르는 시간이 길고, 습지와 같은 주행저항이 큰 특정지면에서 탈출능력이 떨어지게 된다고 하는 단점이 있었다.However, since the main control valve is a second hydraulic pump to drive the driving motor, when driving up a long road or traveling for a long time, the maximum load is applied to the driving motor while the hydraulic pressure of the driving motor is applied. This high pressure condition increases the failure rate of the driving motor, which not only decreases the service life, but also results in a long time to reach the maximum driving speed after starting, and the ability to escape from a specific ground with a large running resistance such as a wetland. There was a disadvantage.
이와 같은 단점을 보완하기 위해 종래에는 제2도에 도시된 바와 같이, 주행용 제어밸브(31, 32) 2개를 사용하여 제1유압펌프(33)와 제2유압펌프(34)에서 토출된 압유를 동시에 공급시켜 주행모우터(35)를 구동시켜주도록 된 것이 있는 바, 이렇게 주행제어밸브(31, 32)를 주행모우터(35)에 연결시켜주게 되면 주행모우터(35)에 발생되는 무리한 과부하 현상이 방지되면서 주행견인성능을 향상시켜줄 수는 있으나, 이와같은 구조로 된 주행장치는 제조원가가 상승할 뿐만아니라 배관의 구성이 복잡하여 조립 또는 정비하는데 어려운 결점을 갖게 된다.In order to compensate for this disadvantage, conventionally, as shown in FIG. 2, the two hydraulic control valves 31 and 32 are discharged from the first hydraulic pump 33 and the second hydraulic pump 34. At the same time, the driving motor 35 is driven by supplying pressure oil, and when the driving control valves 31 and 32 are connected to the driving motor 35, the driving motor 35 is generated. It is possible to improve driving towing performance while preventing excessive overload phenomenon, but the traveling device having such a structure not only increases manufacturing cost but also has a complicated defect in assembly or maintenance due to the complicated configuration of the pipe.
이에 본 고안은 상기와 같은 제반 결점을 감안해서 안출된 것으로, 구조가 간단할 뿐만 아니라 주행모우터에 과부하가 걸리지 않게 되어 수명이 연장되도록 된 휠타입 중장비 주행장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above-described drawbacks, and its purpose is to provide a wheel-type heavy-duty traveling device that is not only overloaded in structure but also overloaded on a driving motor, thereby extending its life.
상기와 같은 목적을 달성하기 위한 본 고안은, 주제어밸브의 제2련측 로직(logic)밸브가 파일럿드파이프를 매개로 제1련측 주행제어밸브 한쪽에 연결된 파일럿트요소를 지나 드레인통로로 연결시켜진 구조로되어, 상기 주행제어밸브를 주행상태로 스푸울을 이동시켜주게 되면 상기 주행제어밸브의 파일럿트요소는 차단되게 되어 파일럿트파이프 내부에 유압이 높아짐으로써 로직밸브의 포핏이 열리게 되고 이어, 제2련측에 공급된 제1유압펌프로 부터 토출된 압유는 유압통로를 통하여 제2유압펌프의 유압통로와 합류되어 주행모우터를 구동시켜주도록 되어있다.The present invention for achieving the above object, the second logic logic valve of the main control valve is connected to the drain passage through a pilot element connected to one side of the first travel control valve via a pilot pipe. In the structure, when the driving control valve is moved to the driving state, the pilot element of the driving control valve is blocked, so that the hydraulic pressure is increased inside the pilot pipe, thereby opening the poppet of the logic valve. The hydraulic oil discharged from the first hydraulic pump supplied to the two sides joins the hydraulic passage of the second hydraulic pump through the hydraulic passage to drive the driving motor.
이하 본 고안을 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 고안에 따른 주행모우터를 구동시켜주기 위한 유압회로도로서, 주모우터(1)에 의해 작동되는 제2유압펌프(2)는 제1련측 밸브유닛(3)의 주행제어밸브(4)를 매개로 주행모우터(5)에 연결되어있는 한편, 상기 제2유압펌프(2)와 동축으로 구동되는 제1유압펌프(6)는 제2련측밸브유닛(7)의 로직밸브(8)를 매개로 감압밸브(9)를 지나 중장비의 각 구성부품을 동작시키는 제어밸브에 연결되고, 상기 로직밸브(8)직전의 압유통로에는 상기 제1련측 밸브유닛(3)의 유압통로(10)와 합류되는 유압통로(11)가 연결되며, 이 로직밸브(8)에는 드레인 통로(12)와 연결된 파일럿트파이프(13)와 연결되어 있는 바, 이 파일럿트파이프(13)가 상기 제1련측 밸브유닛(3)의 주행제어밸브(4)에 설치된 파일럿트요소(14)에 의해 개폐시켜지도록 되어있다.1 is a hydraulic circuit diagram for driving a driving motor according to the present invention, the second hydraulic pump (2) operated by the main motor (1) is a travel control valve (4) of the first side valve unit (3) The first hydraulic pump 6, which is coaxially driven with the second hydraulic pump 2, is connected to the driving motor 5 via the logic valve 8 of the second valve unit 7. It is connected to the control valve for operating each component of the heavy equipment through the pressure reducing valve (9) via a medium, and the hydraulic passage of the first valve unit (3) in the pressure passage immediately before the logic valve (8) 10 is connected to the hydraulic passage 11, and the logic valve 8 is connected to the pilot pipe 13 connected to the drain passage 12, which is connected to the pilot pipe 13. The opening and closing is made possible by the pilot element 14 provided in the traveling control valve 4 of the single side valve unit 3.
이상과 같이 구성된 본 고안은, 제1도에 도시된 바와 같이 주행제어밸브(4)를 중립상태로 되게 하면 주행모우터(5)에는 유압이 공급되지 않게 되어 정지되게 되고, 이때 제1련측밸브유닛(3)중 로직밸브(8)에 연결된 파일럿트파이프(13)는 드레인통로(12)와 연결된 상태에서 제1유압펌프(6)로부터 토출된 압유는 제2련측밸브유닛(7)의 로직밸브(8)를 통과하여 감압밸브(9)를 지나 각종 장비를 작동시켜 주게 된다.According to the present invention configured as described above, when the traveling control valve 4 is in a neutral state as shown in FIG. 1, the hydraulic pressure is not supplied to the traveling motor 5, and the stop is stopped. The pilot oil 13 connected to the logic valve 8 of the unit 3 is discharged from the first hydraulic pump 6 while connected to the drain passage 12. After passing through the valve (8) through the pressure reducing valve (9) to operate the various equipment.
다음 상기 제1련측밸브유닛(3)의 주행제어밸브(4)의 좌측 스푸울(14a)을 밀어주게 되면 제2유압펌프(2)로부터 토출된 압유는 유압통로(10)를 통해 상기 주행제어밸브(4)를 지나 주행모우터(5)를 구동시켜주게 되고, 이때 상기 주행제어 밸브(4)의 파일럿트요소(14)에 연결된 파일럿트파이프(13)는 차단시켜지게 되는 바, 이 파이럿트파이프(13)의 내부압력이 커지게 됨으로써 상기 제2련측밸브유닛(7)의 로직밸브(8) 내부에 있는 포핏(도시안됨)을 열어주게 되고, 이 로직밸브(8)의 포핏이 열리게 되면 감압밸브(9)로 흐르는 유로는 차단되게 되어 이 로직밸브(8)의 하단까지 공급된 압유가 유압통로(11)를 통해 합류점(P)에서 상기 제2유압펌프(2)에서 토출된 압유와 합류되게 된다.Next, when the left sprue 14a of the traveling control valve 4 of the first valve unit 3 is pushed, the hydraulic oil discharged from the second hydraulic pump 2 is controlled through the hydraulic passage 10. The driving motor 5 is driven through the valve 4, and at this time, the pilot pipe 13 connected to the pilot element 14 of the driving control valve 4 is shut off. As the internal pressure of the pipe 13 increases, the poppet (not shown) inside the logic valve 8 of the second valve unit 7 is opened, and the poppet of the logic valve 8 opens. When the flow path to the pressure reducing valve 9 is blocked, the pressure oil supplied to the lower end of the logic valve 8 is discharged from the second hydraulic pump 2 at the confluence point P through the hydraulic passage 11. Will join.
한편 상기 주행제어밸브(4)의 우측 스푸울(14b)을 밀어주게 되면 작동압유의 흐름방향은 반대로 되어 주행모우터(5)는 역회전하게 되고, 이때에도 상기 정회전시와 같이 제1유압펌프(6)에서 토출된 압유가 합류점(P)에서 합류되게 된다.On the other hand, when the right spoul 14b of the traveling control valve 4 is pushed, the flow direction of the working pressure oil is reversed, and the driving motor 5 is reversely rotated. In this case, the first hydraulic pump is operated as in the forward rotation. The pressurized oil discharged at 6 is joined at the confluence point P. FIG.
이상과 같이 설명된 본 고안에 의하면, 주행제어밸브(4) 한쪽에 파일럿요소(14)를 설치하고 이 파일럿트요소(14)가 제2련측밸브 유닛(7)의 로직밸브(8)와 드레인통로(12)사이에 연결된 파일럿트파이프(13)를 개폐시켜주도록 연결됨으로써, 중장비가 주행할 때 제2유압펌프(2)와 제1유압펌프(6)에서 토출된 압유를 합하여 주행모우터(5)를 주행시켜 주게 되어, 이 중장비가 언덕 오르막길을 장시간 주행하게 되어도 상기 주행모우터(5)에 과부하가 걸리지 않게 되어 주행성능이 향상되게 되는 잇점이 있다.According to the present invention described above, the pilot element 14 is installed on one side of the travel control valve 4, and the pilot element 14 is connected to the logic valve 8 and the drain of the second valve unit 7. Connected to open and close the pilot pipe 13 connected between the passages 12, the heavy oil discharged from the second hydraulic pump 2 and the first hydraulic pump 6 when the heavy equipment is running, driving motor ( 5), the heavy equipment can run the hill uphill for a long time, so that the driving motor 5 is not overloaded so that the running performance is improved.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR2019900003930U KR940000183Y1 (en) | 1990-03-31 | 1990-03-31 | Oil-pressure control device of wheel type excavator |
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KR2019900003930U KR940000183Y1 (en) | 1990-03-31 | 1990-03-31 | Oil-pressure control device of wheel type excavator |
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KR910016900U KR910016900U (en) | 1991-10-28 |
KR940000183Y1 true KR940000183Y1 (en) | 1994-01-19 |
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KR2019900003930U KR940000183Y1 (en) | 1990-03-31 | 1990-03-31 | Oil-pressure control device of wheel type excavator |
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KR (1) | KR940000183Y1 (en) |
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- 1990-03-31 KR KR2019900003930U patent/KR940000183Y1/en not_active IP Right Cessation
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