KR950005248Y1 - Oilpressure control devices for lifting work of excavator - Google Patents

Oilpressure control devices for lifting work of excavator Download PDF

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Publication number
KR950005248Y1
KR950005248Y1 KR2019910003842U KR910003842U KR950005248Y1 KR 950005248 Y1 KR950005248 Y1 KR 950005248Y1 KR 2019910003842 U KR2019910003842 U KR 2019910003842U KR 910003842 U KR910003842 U KR 910003842U KR 950005248 Y1 KR950005248 Y1 KR 950005248Y1
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KR
South Korea
Prior art keywords
pump
valve
excavator
controller
oilpressure
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Application number
KR2019910003842U
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Korean (ko)
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KR920018190U (en
Inventor
권영민
Original Assignee
현대중장비산업 주식회사
김형벽
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Priority to KR2019910003842U priority Critical patent/KR950005248Y1/en
Publication of KR920018190U publication Critical patent/KR920018190U/en
Application granted granted Critical
Publication of KR950005248Y1 publication Critical patent/KR950005248Y1/en

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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
    • E02F9/2239—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
    • 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
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations 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
    • E02F9/2264—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
    • 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

Abstract

내용 없음.No content.

Description

굴삭기의 미세작업을 위한 유압장치Hydraulics for Fine Work of Excavators

제 1 도는 본 고안의 콘트롤러의 입출력도.1 is an input / output diagram of a controller of the present invention.

제 2 도는 본 고안의 콘트롤러의 연산 후로우챠트.2 is an operational flow chart of the controller of the present invention.

제 3 도는 본 고안의 아암의 유압회로도.3 is a hydraulic circuit diagram of the arm of the present invention.

제 4 도는 본 고안의 붐의 유압회로도.4 is a hydraulic circuit diagram of the boom of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : CPU콘트롤러 2 : 작업모드 선택스위치1: CPU controller 2: Work mode selector switch

Ry: 리레이 3 : 소레노이드밸브R y : Relay 3: Solenoid valve

4, 6 : 방향절환밸브 P1, P2, P3: 펌프4, 6: Directional switching valve P 1 , P 2 , P 3 : Pump

5, 7, 8 : 로직밸브 C1, C2: 제어밸브5, 7, 8: logic valve C 1 , C 2 : control valve

본 고안은 건설중장비인 굴삭기의 아암과 붐을 사용하여 리프팅 작업을 행할 때 2개의 피스턴 펌프에서 토출된 유량이 합류되도록 되어있기 때문에 각기 UP DOWN 두기능을 동시에 선택했다가 한기능을 정지시켰을 경우 나머지 기능쪽으로 유량이 갑자기 2배로 흐르는 것을 제어함으로서 미세조작이 가능케한 굴삭기 아암, 붐의 펌프 합류 해제기능을 위한 유압장치에 관한 것이다.When the lifting work is carried out by using the arm and boom of the excavator, which is the construction equipment, the flow rate discharged from the two piston pumps is joined, so when the two functions are selected simultaneously and the one function is stopped, The present invention relates to an excavator arm and a hydraulic device for releasing pump confluence of a boom, which enable micromanipulation by controlling the flow of a double flow rate suddenly.

종래 굴삭기는 상술한 바와같이 아암과 펌프의 합류 해제기능이 없으면 미세작업이 곤란함으로 작업의 정밀도와 안전성에 취약한 결점이 있었다.Conventional excavators, as described above, had difficulty in fine work without the combined release function of the arm and the pump, and thus had weaknesses in working accuracy and safety.

즉, 이미 알려진 일본특개소 57-133940호의 기술을 간략하면, 원동기와 펌프 유압회로시스템에 있어서 1개의 고정용량 펌프로서 선회용 액압모타를 구동시켜 다른 가변용량 펌프에 의하여 다른 작업기를 구동시키고 선회용 회로의 유압모타의 토출쪽 회로와 압입쪽 회로로부터 파이로트압을 취출하고, 토출쪽 관로의 변환밸브를 변환시켜 탱크라인으로부터 선회체 회전속도에 비례한 배압과 선회체 구동 압력을 레규레이터 밸브에 유도하여 2개의 가변펌프의 출력을 변화시켜 3대의 액압 펌프의 입력 마력의 합계를 일정하게 제어하게하는 구조로 되어있다. 그러나 이러한 구성은 작업모드중 미세작업을 선택할 때 자동으로 펌프 합류가 해제되는 기능은 없는 것이다.In other words, in the known Japanese Patent Application Laid-Open No. 57-133940, the hydraulic motor for turning as one fixed displacement pump in the prime mover and the pump hydraulic circuit system is used to drive another working machine by the other variable displacement pump and turn the The pilot pressure is taken out from the discharge side circuit and the press-in side circuit of the hydraulic motor of the circuit, and the conversion valve of the discharge side pipe is converted, and the back pressure proportional to the revolution speed of the swing body and the swing drive pressure from the tank line are transferred to the regulator valve. By induction, the output of two variable pumps is changed so that the sum of the input horsepower of the three hydraulic pumps is constantly controlled. However, this configuration does not have the function of automatically canceling the pump confluence when selecting the fine operation in the operation mode.

본 고안은 이와같은 종래의 결점을 제거키 위하여 작업모드중 미세작업을 선택할 때 자동으로 펌프합류가 해제되어 작업성이 향상되도록 하였다.The present invention has been made to improve the workability by automatically releasing the pump confluence when selecting the fine work of the work mode to eliminate such a conventional defect.

이하 고안의 요지를 구성과 작용효과 및 첨부도면에 연계하여 상세히 설명하면 다음과 같다.Hereinafter, the subject matter of the present invention will be described in detail in connection with the configuration and the effect and the accompanying drawings.

제 1 도와 같이 작업조건에 따라 필요한 작업모드를 선택할 수 있는 CPU 콘트롤러(1)가 구비된 굴삭기에서 작업모드 선택스위치(2)에 의하여 작업모드가 선택되면 제 2 도의 후로우챠트의 과정에 의해 콘트롤러(1)로부터 리레이(Ry)에 신호가 출력되고 제 2 도에서 1작업모드나 2작업모드가 선택되면 OV의 신호를 출력하고 그외의 3작업모드나 4작업모드가 선택되면 5V의 신호를 출력하며 리레이(Ry)에 신호가 출력되면 소레노이드밸브(3)을 여자시켜 파이로트압 Y가 발생하여 제 3 도에서와 같이 아암의 방향전환밸브(4)에서 파이로트압 Y가 가해져 펌프(P1)으로부터의 펌프 합류가 차단되고 펌프(P1)의 합류가 차단되면 로직밸브(5)에서 발생되는 파이로트압이 방향절환밸브(4)에 의해 오일탱크로 드레인되어 펌프(P1)에서 발생된 압력은 로직밸브(5)을 거쳐 배출되고 제 4 도에서와 같이 붐의 방향절환밸브(4)에 의해 오일탱크로 드레인되어 펌프(P1)에서 발생된 압력은 로직밸브(5)을 거쳐 배출되고 제 4 도에서와 같이 붐의 방향절환밸브(6)에 파이로트압 Y이 가해지면 펌프(P2)의 합류가 차단되면 로직밸브(7)에서 발생한 파이로트 압력이 방향절환밸브(6)에 의해 탱크로 드레인되어 펌프(P2)에서 발생된 압력은 로직밸브(7)을 거쳐 배출되어 양 펌프(P1), (P2)의 합류를 해제하는 것이다.As shown in FIG. 1, when an operation mode is selected by the operation mode selection switch 2 in an excavator equipped with a CPU controller 1 capable of selecting a required operation mode according to the working conditions, the controller is controlled by the flow chart of FIG. 2. The signal is output from relay (1) to (Ry), and when the 1st work mode or 2nd work mode is selected in Fig. 2, the signal of OV is output; when other 3rd work mode or 4th work mode is selected, 5V signal is output. When a signal is outputted to the relay Ry, the solenoid valve 3 is excited to generate a pilot pressure Y. As shown in FIG. 3, the pilot pressure Y is applied to the direction change valve 4 of the arm to pump the pump. When the pump confluence from (P 1 ) is blocked and the confluence of the pump (P 1 ) is blocked, the pilot pressure generated by the logic valve (5) is drained to the oil tank by the direction switching valve (4) to pump (P 1). ), The pressure generated is discharged through the logic valve (5). And the fourth is a drain to the oil tank by the directional control valve 4 of the boom as shown in Fig. In the pressure generated in the pump (P 1) is a direction of the boom as shown in FIG. 4 from being discharged through the logic valve 5 When the pilot pressure Y is applied to the switching valve 6, when the confluence of the pump P 2 is interrupted, the pilot pressure generated at the logic valve 7 is drained to the tank by the direction switching valve 6 to pump the pump P 2. The pressure generated in) is discharged through the logic valve (7) to release the confluence of both pumps (P 1 ) and (P 2 ).

도면중 미설명부호 (C1)은 아암작동제어밸브 (C2)는 붐작동제어밸브이다.In the drawings, reference numeral C 1 denotes an arm operation control valve C 2 , and a boom operation control valve.

Claims (1)

CPU 콘트롤러(1)가 구비된 굴삭기의 콘트롤러(1)가 펌프를 제어하는 구성에 있어서, 콘트롤러(1)에 작업모드 선택스위치(2)를 설치하고 리레이(Ry)와 펌프(P3)의 소레노이드밸브(3)을 연결하며 파이로트압 Y에 의해 펌프(P1)합류가 차단되게 방향절환밸브(4)를 설치하여 그뒤에 로직밸브(5)를 설치하여 배출되게 하여 펌프(P1)을 차단하는 아암 유압회로를 구성하고 방향절환밸브(6)에 파이로트압 Y에 의해 펌프(P2)의 합류가 차단되게 방향절환밸브(6)를 설치하여 그뒤에 로직밸브(7)를 설치하여 배출되게 하여 펌프(P2)를 차단하는 붐 유압회로를서로 결합 구성한 것을 특징으로 하는 굴삭기의 미세작업을 위한 유압회로.In the configuration in which the controller 1 of the excavator equipped with the CPU controller 1 controls the pump, a work mode selector switch 2 is installed in the controller 1 and the relay Ry and the pump P 3 Connect the solenoid valve (3) and install the directional control valve (4) so that the pump (P 1 ) joining is blocked by the pilot pressure Y, the logic valve (5) behind it to discharge the pump (P 1 ), And the direction switching valve (6) is installed in the direction switching valve (6) to block the confluence of the pump (P 2 ) by the pilot pressure Y, and then the logic valve (7) Hydraulic circuit for the micro-work of the excavator, characterized in that configured to be coupled to each other boom hydraulic circuit to block the pump (P 2 ) by installing and discharged.
KR2019910003842U 1991-03-22 1991-03-22 Oilpressure control devices for lifting work of excavator KR950005248Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019910003842U KR950005248Y1 (en) 1991-03-22 1991-03-22 Oilpressure control devices for lifting work of excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019910003842U KR950005248Y1 (en) 1991-03-22 1991-03-22 Oilpressure control devices for lifting work of excavator

Publications (2)

Publication Number Publication Date
KR920018190U KR920018190U (en) 1992-10-17
KR950005248Y1 true KR950005248Y1 (en) 1995-07-03

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KR2019910003842U KR950005248Y1 (en) 1991-03-22 1991-03-22 Oilpressure control devices for lifting work of excavator

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KR920018190U (en) 1992-10-17

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