KR890008820Y1 - Excavator - Google Patents
Excavator Download PDFInfo
- Publication number
- KR890008820Y1 KR890008820Y1 KR2019850013079U KR850013079U KR890008820Y1 KR 890008820 Y1 KR890008820 Y1 KR 890008820Y1 KR 2019850013079 U KR2019850013079 U KR 2019850013079U KR 850013079 U KR850013079 U KR 850013079U KR 890008820 Y1 KR890008820 Y1 KR 890008820Y1
- Authority
- KR
- South Korea
- Prior art keywords
- spool
- arm
- hydraulic
- swing
- flow rate
- 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
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
- E02F9/12—Slewing or traversing gears
- E02F9/121—Turntables, i.e. structure rotatable about 360°
- E02F9/123—Drives or control devices specially adapted therefor
-
- 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
Landscapes
- 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)
Abstract
내용 없음.No content.
Description
제1도는 종래의 유압 굴삭기 제어 회로도.1 is a conventional hydraulic excavator control circuit diagram.
제2도는 제1도의 작동에 따른 유량 배분 상태도.Figure 2 is a flow diagram of the flow distribution according to the operation of FIG.
제3도는 제1도의 작동에 따른 암 실린더와 선회모우터의 압력 변화선도표.3 is a pressure diagram of the arm cylinder and the swing motor according to the operation of FIG.
제4도는 또 다른 종래 유압 굴삭기의 제어 회로도.4 is a control circuit diagram of another conventional hydraulic excavator.
제5도는 본 고안의 유압굴삭기 제어 회로도.5 is a hydraulic excavator control circuit diagram of the present invention.
제6도는 본 고안의 요부 발췌도.6 is an excerpt of the main part of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 펌푸 2 : 선회스풀1: Pump 2: Swivel Spool
3 : 암스풀 4 : 제어밸브3: arm spool 4: control valve
5 : 선회모우터 6 : 암실린더5: turning motor 6: dark cylinder
7 : 탱크 8 : 자동보상밸브7: tank 8: automatic compensation valve
9 : 가변오리피스형스풀 10 : 스프링9: Variable Orifice Spool 10: Spring
11, 12 : 파이롯트관11, 12: pilot tube
본 고안은 유압 구동식 굴삭기에 있어서, 작동부의 복합동작 특히 선회(Swing)와 암(Arm)의 균등하고 원활한 동작을 위한 유압의 자동 선회 보상 회로에 관한 것이다.The present invention relates to a hydraulic automatic swing compensation circuit for an even and smooth operation of the combined operation of the operating unit, in particular swing and arm in the hydraulically driven excavator.
유압구동식 굴삭기(Excarvator)에 있어서, 굴삭한 토사를 버켓으로 퍼담는 상차 작업시에는 작업의 능률을 향상시키기 위하여 반드시 조종실 등이 위치한 상체의 좌우 선회 동작과 버켓을 부착한 암의 절첩 동작을 동시에 복합적으로 구동시킴은 필연적인 것이다.In the hydraulically driven excavator (Excarvator), when loading the excavated earth and sand into the bucket, be sure to simultaneously turn the left and right swings of the upper body where the cockpit, etc. and the arm with the bucket are folded to improve the work efficiency. Running in combination is inevitable.
그런데, 도면 제1도에서와 같이 상체의 선회와 암의 절첩동작은 동일 펌푸에서 유량을 분배 받아 작동되기 때문에 선회스풀(2')과 암스풀(3')을 동시에 조작하면 도면 제2도에서와 같은 병렬 연결 상태가 되는데, 도면 제3도에서와 같이 상체 선회모우터(5')를 기동시키는데 필요로 하는 유압의 저항이 암 실린더(6') 동작에 소요되는 유압보다 상대적으로 높기 때문에 오일이 압력이 낮은 암작동부(암실린더(6'))내로 몰리게 되므로서 상체의 선회가 암의 작동과 복합적으로 원활하게 이루어지지 않고 암의 동작이 완료된후에 선회가 이루어지는 결점이 있어서 굴삭 → 덤프 → 굴삭으로 이어지는 싸이클 타임(Cycle Time)이 길어지면서 작업속도가 느리고 작업능률이 저하될뿐만 아니라 사용자로부터의 제품에 대한 신뢰 및 선호도가 떨어지는 등의 문제점이 있었다.However, as shown in FIG. 1, the turning of the upper body and the folding action of the arm are operated by distributing the flow rate at the same pump, so that when the swing spool 2 'and the arm spool 3' are operated at the same time, FIG. As shown in FIG. 3, the oil pressure required to start the upper body swing motor 5 'is relatively higher than the oil pressure required to operate the arm cylinder 6'. This pressure is driven into the lower arm operating part (arm cylinder 6 '), so that the upper body turning is not made smoothly with the arm operation, and the turning is made after the arm is completed. As the cycle time leading to the excavation becomes longer, there are problems such as slow working speed and poor work efficiency, as well as low trust and preference from the user. It was.
이러한 결점을 보완하기 위하여 안출된 것이 도면 제4도에서와 같은 유량제어 방식인데 이는 암실린더(6')로 가는 배관에 교축 장치 즉 오리피스(13)를 설치하므로서 암 실린더(6')를 움직이는데 필요한 저항치를 선회기동 저항과 같은 수준이 되도록 보상하는 방법이었다.In order to compensate for this drawback, a flow control method as shown in FIG. 4 is provided, which is necessary to move the arm cylinder 6 'by installing an throttling device or an orifice 13 in the pipe to the arm cylinder 6'. The resistance was compensated to the same level as the turning resistance.
그러나, 이와같은 방법의 결정적인 결함은 선회모우터(5')의 부하 변동에 따라 때로는 암실린더(6')가 작동되지 않는 경우가 생긴다는 것이다.However, the decisive deficiency of such a method is that the arm cylinder 6 'sometimes fails to operate due to the load variation of the swing motor 5'.
따라서, 본 고안은 종래의 위와같은 불균형에 따른 암과 상체의 동시 동작상의 문제점을 해결하기 위하여 안출된 것으로 이를 도면에 의해 상세히 설명하면 다음과 같다.Therefore, the present invention has been devised to solve the problem of simultaneous operation of the arm and the upper body according to the above imbalance as described above in detail by the drawings as follows.
펌푸(1)에서 나온 유량이 상호 병렬 연결되고 레버 타입으로 동작되는 선회스풀(Spool)(2)과 암스풀(3)로서 구성된 제어밸브(4)를 각기 분리통과하여 선회 모우터(5)와 암실린더(6)로 유압되어 소정의 작동을 시켜주고 탱크(7)로 빠지도록 구성된 유압식 제어회로에 있어서, 도면 제5도 및 제6도에서와 같이 제어밸브(4)내의 암스풀(3) 쪽으로 분기된 유압라인 상에 스프링(10)을 탄설한 가변오리피스형 스풀(9)과 그 양측으로 주관로에 각각 파이롯트관(11)(12)을 연결한 자동보상 밸브(8)를 설치하여서 된 것이다.The flow rate from the pump (1) is connected in parallel to each other and the control valve (4) configured as a spool (3) and a spool (3) operating in a lever type is separately passed through the turning motor (5) and In a hydraulic control circuit configured to be hydraulically operated by the arm cylinder 6 to perform a predetermined operation and to be discharged into the tank 7, the arm spool 3 in the control valve 4 as shown in FIGS. 5 and 6. By installing a variable orifice type spool (9) with a spring (10) on the hydraulic line branched toward the side and an automatic compensation valve (8) connecting pilot pipes (11) and (12), respectively, on the main pipe line on both sides thereof. will be.
이상과 같이 연결 설치된 본 고안은, 가변오리피스형 스풀(9)이 선회모우터(5)측 배관과 암실린더(6)측 배관 사이의 설정 압력과 스프링(10)의 탄발력을 일치시켜 평형을 유지토록해 놓으므로서 암과 스윙을 동시 작동시 양측 배관사이에 압력차가 발생하면 파이롯트관(11)(12)에 의하여 스풀(9)이 상하로 움직이면서 통과유량을 조정하므로서 양측의 유압 평형을 유지토록 하여 암실린더(6)와 상체의 선회모우터(5)가 균등하게 동시 동작하도록 한 것이다.According to the present invention, the orifice of the variable orifice type spool 9 is connected to the set pressure between the pipe on the swing motor 5 side and the pipe on the arm cylinder 6 side and the elasticity of the spring 10 is balanced. If pressure difference occurs between both pipes during simultaneous operation of the arm and the swing while maintaining the holding force, the spool (9) moves up and down by the pilot pipes (11) and (12) to adjust the flow rate to maintain hydraulic equilibrium on both sides. In this way, the dark cylinder 6 and the swing motor 5 of the upper body are operated at the same time.
이하에서 그 작용관계를 좀더 상세히 살펴보면, 도면 제6도에 나타낸 바와 같이 PS : 선회압력 Pa : 암 작동압력 K : 스프링(10)상수 A : 스풀(9)의 단면적 S : 스풀의 이동거리로서 즉, 자동보상 밸브의 스풀(9)은 힘의 평형을 이루는 위치로 이동하여 그때의 가변오리피스 개구면적 a에 의해 암 실린더(6)쪽으로 가는 유량을 제어하여 선회모우터(5) 즉 상체의 선회 동작을 보상케된다.Looking at the action relationship in more detail below, as shown in Figure 6 PS: swing pressure Pa: arm operating pressure K: spring 10 constant A: cross-sectional area of the spool (9) S: as the moving distance of the spool , The spool 9 of the automatic compensation valve is moved to a position where the balance of force is balanced, and the turning motor 5, i.e., the swinging motion of the upper body, is controlled by controlling the flow rate toward the arm cylinder 6 by the variable orifice opening area a at that time. To compensate.
이상과 같이 암과 상체의 스윙을 동시 작동시, 본 자동 보상 밸브가 선회모우터(5)측과 암 실린더(6)측의 유압을 감지하여 압력차가 발생시 가뱐오리피스를 가지는 스풀을 동작시켜 통과유량을 조정하여 양측의 유압을 균등하게 유지해 주므로서 암과 스윙동작이 원활하게 동시에 병행해서 이루어지도록 하여 엑스커베이터의 상차 작업시 굴삭 → 덤프 → 굴삭으로 이어지는 싸이클 타임을 최소로 단축하면서 작업능률을 향상시키고, 제품의 신뢰도를 향상시킬 수 있는등의 특출한 효과가 있는 것이다.As described above, when simultaneously swinging the arm and the upper body, the automatic compensation valve senses the hydraulic pressure on the swing motor 5 side and the arm cylinder 6 side, and operates a spool having a spherical orifice when a pressure difference occurs. By maintaining the hydraulic pressure on both sides equally, the arm and the swing movement can be done in parallel at the same time to improve the working efficiency while minimizing the cycle time from excavation → dump → excavation during loading operation of the excavator. There is a special effect such as to improve the reliability of the product.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019850013079U KR890008820Y1 (en) | 1985-10-08 | 1985-10-08 | Excavator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019850013079U KR890008820Y1 (en) | 1985-10-08 | 1985-10-08 | Excavator |
Publications (2)
Publication Number | Publication Date |
---|---|
KR870006868U KR870006868U (en) | 1987-05-09 |
KR890008820Y1 true KR890008820Y1 (en) | 1989-12-05 |
Family
ID=19245756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019850013079U KR890008820Y1 (en) | 1985-10-08 | 1985-10-08 | Excavator |
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Country | Link |
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KR (1) | KR890008820Y1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100611718B1 (en) * | 2005-06-17 | 2006-08-11 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Compensate pressure hydraulic circuit of having holding valve |
-
1985
- 1985-10-08 KR KR2019850013079U patent/KR890008820Y1/en not_active IP Right Cessation
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Publication number | Publication date |
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KR870006868U (en) | 1987-05-09 |
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