KR950017579A - Hydraulic control system of wheel excavator - Google Patents

Hydraulic control system of wheel excavator Download PDF

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Publication number
KR950017579A
KR950017579A KR1019930031448A KR930031448A KR950017579A KR 950017579 A KR950017579 A KR 950017579A KR 1019930031448 A KR1019930031448 A KR 1019930031448A KR 930031448 A KR930031448 A KR 930031448A KR 950017579 A KR950017579 A KR 950017579A
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KR
South Korea
Prior art keywords
terminal
valve
braking
pressure
suspension
Prior art date
Application number
KR1019930031448A
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Korean (ko)
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KR0171387B1 (en
Inventor
허태규
Original Assignee
김무
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 김무, 삼성중공업 주식회사 filed Critical 김무
Priority to KR1019930031448A priority Critical patent/KR0171387B1/en
Priority to US08/340,629 priority patent/US5599073A/en
Priority to JP6306817A priority patent/JP2707418B2/en
Priority to DE4441003A priority patent/DE4441003A1/en
Publication of KR950017579A publication Critical patent/KR950017579A/en
Application granted granted Critical
Publication of KR0171387B1 publication Critical patent/KR0171387B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/86—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration wherein the brakes are automatically applied in accordance with a speed condition and having means for overriding the automatic braking device when a skid condition occurs

Abstract

본 발명은 휠 굴삭기(wheel excavator)의 현가(suspension)장치 및 제동(break)시스템에 관한 것으로,The present invention relates to a suspension device and a brake system of a wheel excavator,

축압기(4)속에 저장된 작동유가 전기밸브(9)와 감압밸브(21) 및 체크밸브(22)를 통하여 제동실린더(7)를 작동시키도록 각각 연결시킨 제동장치유압회로와, 전기스위치(17)와 다이오드(18) 및 압력스위치(19)를 이용한 전기회로를 포함하고, 전기스위치(17)의 상태에 따라 주행제동장치, 주차제동장치, 작업제동장치 그리고 현가장치가 각각 종속적으로 또는 독립적으로 작동하도록 하는 것이 특징이다.A braking device hydraulic circuit connected to the hydraulic oil stored in the accumulator 4 so as to operate the braking cylinder 7 through the electric valve 9, the pressure reducing valve 21 and the check valve 22, and the electric switch 17 ) And an electric circuit using a diode 18 and a pressure switch 19, and the driving brake, parking brake, work brake and suspension are dependent or independent depending on the state of the electrical switch 17, respectively. The feature is that it works.

Description

휠 굴삭기의 유압 제어 시스템Hydraulic control system of wheel excavator

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래 기술에 따른 굴삭기의 유압 제어 시스템의 구성을 나타낸 도면.1 is a view showing the configuration of a hydraulic control system of an excavator according to the prior art.

제2도는 본 발명에 따른 유압 제어 시스템의 구성을 나타낸 것으로.2 is a view showing the configuration of a hydraulic control system according to the present invention.

제2a도는 주차시의 계통도.2a is a schematic diagram of parking.

제2b도는 현가 장치 잠금시의 계통도.2b is a schematic diagram of suspension system locking.

제2c도는 주행시의 계통도.2c is a schematic diagram of driving.

제2d도는 작업시의 계통도.Figure 2d is a schematic diagram at work.

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

10 : 제1솔레노이드 밸브 12 : 제2솔레노이드 밸브10: first solenoid valve 12: second solenoid valve

13 : 주차 제동 실린더 15 : 현가장치 조절밸브13: parking brake cylinder 15: suspension adjustment valve

Claims (2)

엔진(1)에 의해 각각 구동되는 제1의 펌프(2) 및 제2의 펌프(2a)와; 상기 제1펌프(2)에 순차로 연결되는 릴리프 밸브(14), 제1 및 제2의 솔레노이드 밸브(10,12)와; 상기 제2펌프(2a)에 순차로 연결되는 제동 컷 오프 밸브(3)와, 축압기(4), 파일럿 체크 밸브(4), 주행 제동 밸브(5), 파일럿 체크 밸브(6)를 포함하고 ; 상기 제1 펌프(2)로부터 토출되어 릴리프 밸브(14)에 의해 압력이 형성된 작동유가 스위치수단을 통하여 배터리(8)로부터 제공되는 전류에 의해 각각 제어되는 제1의 솔레노이드 밸브(10)와 제2의 솔레노이드 밸브(12)를 각각 통하여 현가장치 조절 밸브(15)와 주차 제동 실린더(13) 및 파일럿 체크 밸브(6)로 각각 제공되게 하여 현가장치와 주차제동장치 및 주행제동장치를 각각 제어함과 아울러 작업 제동 기능을 수행하기 위한 휠 굴삭기의 유압 제어 시스템에 있어서 ; 상기 스위치수단은 상기 제2솔레노이드 밸브(12)와 연결되는 현가단자(S)와, 상기 현가단자(S)로부터 전류가 역류하는 것을 방지하기 위해 전류역류방지수단을 통하여 상기 현가단자(S)와 연결됨과 아울러 상기 제1솔레노이드 밸브(10)와 연결되는 주행제동단자(T)와, 주차를 위한 주차제동단자(P)와, 굴삭작업을 위한 작업제동단자(W)와, 상기 배터리(8)에 일측단이 연결됨과 아울러 타측단이 상기 현가단자(S)와 주행제동단자(T)와 주차제동단자(P) 및 작업제동 단자(W) 중 어느 하나와 선택적으로 연결될 수 있는 가동단자(SW)를 갖고; 두개의 단자를 갖되, 두 단자 중 어느 하나의 단자는 상기 작업제동단자(W)와 연결되고, 상기 파일럿 체크 밸브(6)와 주행 제동 실린더(7) 사이에 작용하는 압력의 크기에 따라 온/오프 되는 압력스위치(19)와; 입력된 작동유의 압력을 낮추기 위한 감압밸브(21)와; 상기 압력스위치(19)의 두 단자 중 다른 하나의 단자와 연결되고 상기 압력스위치(19)를 통하여 제공되는 소정의 전기신호에 응답하여 상기 축압기(4)로부터 제공하는 작동유가 상기 감압밸브(21)로 전달되게 하거나 전달되지 않게 하는 제3의 솔레노이드 밸브(20)와; 전류 및 후륜용 유압제동실린더(7)에 각각 연결되어 상기 파일럿 체크 밸브(6)와 상기 주행 제동 실린더(7)사이에 폐회로를 형성하고, 상기 폐회로 내의 작동유의 압력이 상기 압력스위치(19)의 설정압력에 이르게 되면 상기 압력스위치(19)의 설정압력에 이르게 되면 상기 압력스위치(19)가 "오프"상태로 되게 하여 상기 제3솔레노이드밸브(20)의 포트연결을 절환시켜 감압 밸브(21)의 누유로 인한 작동유의 손실을 방지하는 수단(22)을 부가적으로 포함하는 것을 특징으로 하는 휠 굴삭기의 유압 제어 시스템.A first pump 2 and a second pump 2a respectively driven by the engine 1; A relief valve (14), first and second solenoid valves (10, 12) sequentially connected to the first pump (2); A braking cut-off valve 3 sequentially connected to the second pump 2a, an accumulator 4, a pilot check valve 4, a traveling braking valve 5, a pilot check valve 6 ; The first solenoid valve 10 and the second hydraulic oil discharged from the first pump 2 and formed with pressure by the relief valve 14 are respectively controlled by a current provided from the battery 8 through the switch means. Through the solenoid valve 12 of the suspension control valve 15, the parking brake cylinder 13 and the pilot check valve (6) to control the suspension system, the parking brake system and the driving brake system, respectively. In addition, in the hydraulic control system of the wheel excavator for performing the work braking function; The switch means and the suspension terminal (S) connected to the second solenoid valve 12, and the suspension terminal (S) and the current through the current backflow prevention means to prevent the current flow back from the suspension terminal (S) In addition, the driving braking terminal (T) connected to the first solenoid valve 10, the parking braking terminal (P) for parking, the work braking terminal (W) for the excavation work, and the battery (8) One end is connected to the movable terminal (SW) that the other end can be selectively connected to any one of the suspension terminal (S), the driving braking terminal (T), the parking braking terminal (P) and the work braking terminal (W). ); It has two terminals, and either one of the two terminals is connected to the work braking terminal (W), depending on the magnitude of the pressure acting between the pilot check valve (6) and the travel braking cylinder (7) A pressure switch 19 to be turned off; A pressure reducing valve 21 for lowering the pressure of the input hydraulic oil; The hydraulic oil connected to the other one of the two terminals of the pressure switch 19 and provided from the accumulator 4 in response to a predetermined electrical signal provided through the pressure switch 19 receives the pressure reducing valve 21. A third solenoid valve 20 to be delivered or not delivered; A closed circuit is connected between the pilot check valve 6 and the traveling braking cylinder 7, respectively, connected to the electric current and the rear hydraulic brake cylinder 7, and the pressure of the hydraulic oil in the closed circuit of the pressure switch 19 When the set pressure is reached, the pressure switch 19 is turned "off" when the set pressure of the pressure switch 19 is switched to switch the port connection of the third solenoid valve 20 to reduce the pressure reducing valve 21. Hydraulic control system of a wheeled excavator, characterized in that it further comprises means (22) for preventing the loss of hydraulic fluid due to leakage of oil. 제1항에 있어서, 상기 전류역류방지수단은 캐소우드가 상기 현가단자(S)와 연결되고, 애노우드는 상기 주행제동단자(T)와 연결되는 다이오드(18)를 포함하는 것을 특징으로 하는 휠 굴삭기의 유압 제어 시스템.The wheel according to claim 1, wherein the current backflow prevention means includes a diode 18 having a cathode connected to the suspension terminal S and an anode connected to the traveling braking terminal T. Hydraulic control system of the excavator. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930031448A 1993-12-30 1993-12-30 Suspension and brake of wheel excavator KR0171387B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019930031448A KR0171387B1 (en) 1993-12-30 1993-12-30 Suspension and brake of wheel excavator
US08/340,629 US5599073A (en) 1993-12-30 1994-11-16 Hydraulic system for controlling a brake system and a suspension system of a wheel-type excavator
JP6306817A JP2707418B2 (en) 1993-12-30 1994-11-16 Hydraulic system for braking and suspension control of wheel type excavator
DE4441003A DE4441003A1 (en) 1993-12-30 1994-11-17 Hydraulic system for wheeled excavator brakes and suspension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930031448A KR0171387B1 (en) 1993-12-30 1993-12-30 Suspension and brake of wheel excavator

Publications (2)

Publication Number Publication Date
KR950017579A true KR950017579A (en) 1995-07-20
KR0171387B1 KR0171387B1 (en) 1999-01-15

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KR1019930031448A KR0171387B1 (en) 1993-12-30 1993-12-30 Suspension and brake of wheel excavator

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100682397B1 (en) * 2006-11-23 2007-02-16 주식회사 뉴테크특장 Brake interlock system for high place work vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100682397B1 (en) * 2006-11-23 2007-02-16 주식회사 뉴테크특장 Brake interlock system for high place work vehicles

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Publication number Publication date
KR0171387B1 (en) 1999-01-15

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