KR970000170Y1 - Oil pressure control device for construction machine - Google Patents
Oil pressure control device for construction machine Download PDFInfo
- Publication number
- KR970000170Y1 KR970000170Y1 KR92020741U KR920020741U KR970000170Y1 KR 970000170 Y1 KR970000170 Y1 KR 970000170Y1 KR 92020741 U KR92020741 U KR 92020741U KR 920020741 U KR920020741 U KR 920020741U KR 970000170 Y1 KR970000170 Y1 KR 970000170Y1
- Authority
- KR
- South Korea
- Prior art keywords
- arm
- boom
- check valve
- pump
- logic check
- Prior art date
Links
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
- 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
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
-
- 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
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
-
- 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
-
- 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
- E02F9/2296—Systems with a variable displacement pump
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 유압회로도.1 is a hydraulic circuit diagram of the present invention.
제2도의 (a)는 종래의 로직 체크 밸브의 구조도.2A is a structural diagram of a conventional logic check valve.
제2도의 (b)는 본 고안중 로직 체크밸브의 변경 구조도.2 (b) is a schematic structural diagram of the logic check valve of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 아암 작동펌프 2 : 붐 작동펌프1: Arm Operation Pump 2: Boom Operation Pump
3 : 로직 체크 밸브 4 : 방향전환 밸브3: Logic Check Valve 4: Directional Valve
본 고안은 굴삭기의 붐 및 아암을 동시 작동시 아암의 증속을 위한 유압제어장치에 관한 것이다.The present invention relates to a hydraulic control device for speeding up an arm when the boom and the arm of an excavator are operated simultaneously.
굴삭기의 작업속도를 좌우하는 것은 붐, 아암 및 버켓실린더의 속도와 상부 선회체의 회전속도인데 그중 아암의 속도가 가장 큰 영향을 미친다.The speed of operation of the excavator depends on the speed of the boom, arm and bucket cylinder, and the rotational speed of the upper pivot, of which the speed of the arm has the greatest influence.
그러나 기존의 굴삭기에서는 붐과 아암을 동시에 작동시킬때는 붐 합류를 로직 체크 밸브를 사용하는 경우에 있어 각각 독립된 한개의 펌프 유량을 이용하게 되어 아암의 작업속도가 상대적으로 느려 굴삭기 작업능률이 저하되는 것이다.However, in the existing excavator, when the boom and the arm are operated at the same time, when the boom is combined with the logic check valve, each pump flow rate is used independently and the working speed of the arm is relatively slow, which reduces the excavator work efficiency. .
본 고안은 이와같은 종래의 결점을 제거코자 붐과 아암이 동시에 작업할때 붐 합류용 로직 체크 밸브 회로를 아암의 회로에 절환되게 설치한 구조이다.The present invention has a structure in which a logic check valve circuit for boom joining is switched to the circuit of the arm when the boom and the arm work at the same time to eliminate such a conventional defect.
이하 고안의 요지를 첨부도면에 연계시켜 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
아암 작동펌프(1)와 붐 작동펌프(2)가 로직 체크 밸브(3)와 방향전환 밸브(4)에 의해 각기 단독으로 공급되게 한 구조에 있어서, 로직 체크 밸브(3)를 펌프(1) 라인 P1과 펌프(2) 라인에 서로 연통되게 설치하여 합류실(A)에서 합류하게 함으로써 압력이 높은 붐쪽에서 압력이 낮은 아암쪽으로 유압이 더 많이 흐르게한 구조이다.In the structure in which the arm actuating pump 1 and the boom actuating pump 2 are supplied independently by the logic check valve 3 and the divert valve 4, the logic check valve 3 is pumped (1). It is installed in the line P1 and the pump (2) in communication with each other to join in the confluence chamber (A) so that more hydraulic pressure flows from the high pressure boom toward the lower pressure arm.
미설명부호 5'는 오일탱크, 6은 더블 체크 밸브, 7은 붐업 파일럿이다.Unmarked 5 'is the oil tank, 6 is the double check valve, 7 is the boom-up pilot.
이와같이된 본 고안은 첫째로, 붐 상승 단독 동작시 붐 UP파일럿(7) 압력이 방향전환 밸브(4)를 작동시키므로서 로직체크 밸브(3)을 열리게하여 펌프(1) 오일을 로직 체크밸브(3)을 통과시켜 펌프(2) 오일과 합류하여 붑을 상승시키고 둘째로, 아암 단독 동작시 방향전환 밸브(4)는 로직 체크 밸브(3)가 닫힘으로서 펌프오일(2)은 로직 체크 밸브(3)를 거치지않고 기존의 별도 유압라인을 통하여 펌프(1) 오일과 합류하여 아암을 작동시키며 셋째, 붐 및 아암을 동시 작동시 붐 UP 파일럿(7) 압력이 방향전환 밸브(4)를 작동시켜 로직 체크 밸브(3)을 열리게하여 펌프(1)의 오일과 펌프(2)의 오일을 합류하게 되는데 이때 오일은 상대적으로 압력이 높은 붐쪽에서 압력이 낮은 아암쪽으로 더 많이 흐르게되어 아암의 동작속도를 빠르게 해주는 것이다.In the present invention, first, the boom UP pilot (7) pressure actuates the directional valve (4) to open the logic check valve (3) to operate the pump (1) oil in a logic check valve ( 3) passes through the pump (2) oil to raise the shock, and secondly, in the arm alone operation, the directional valve (4) closes the logic check valve (3), so that the pump oil (2) is a logic check valve ( 3) through the existing separate hydraulic line to the pump (1) oil to operate the arm, and third, the boom UP pilot (7) pressure to operate the directional valve (4) when operating the boom and the arm simultaneously By opening the logic check valve (3), the oil of the pump (1) and the oil of the pump (2) are combined. At this time, the oil flows more from the relatively high pressure boom to the lower pressure arm, thereby increasing the operating speed of the arm. It's faster.
그러므로 본 고안으로서 유압식 굴삭기에서 가장 빈번히 발생하는 붐과 아암의 동시 작동시 별도 유압라인의 구성없이 현재의 로직 체크 밸브를 이용하여 아암의 동작의 증속을 꾀함과 동시에 붐 상승의 단독 작동시에도 속도를 증가시켜 주게되어 전체적으로 굴삭기 전체의 작업 성능을 향상시키는 효과가 있는 것이다.Therefore, as the present design, when the boom and the arm most frequently occur in the hydraulic excavator, the current logic check valve is used to increase the operation of the arm without the configuration of a separate hydraulic line, and the speed is increased even when the boom is operated alone. This will increase the overall performance of the excavator as a whole.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92020741U KR970000170Y1 (en) | 1992-10-27 | 1992-10-27 | Oil pressure control device for construction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR92020741U KR970000170Y1 (en) | 1992-10-27 | 1992-10-27 | Oil pressure control device for construction machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940010173U KR940010173U (en) | 1994-05-23 |
| KR970000170Y1 true KR970000170Y1 (en) | 1997-01-09 |
Family
ID=19342583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR92020741U KR970000170Y1 (en) | 1992-10-27 | 1992-10-27 | Oil pressure control device for construction machine |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970000170Y1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100556022B1 (en) * | 2001-08-21 | 2006-03-03 | 현대중공업 주식회사 | Oil pressure system for driving appratus of excavator |
-
1992
- 1992-10-27 KR KR92020741U patent/KR970000170Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR940010173U (en) | 1994-05-23 |
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| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| REGI | Registration of establishment | ||
| FPAY | Annual fee payment |
Payment date: 20060102 Year of fee payment: 11 |
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| EXPY | Expiration of term |