IT1261382B - Circuito idraulico di comando per organi di lavoro di macchine movimento terra - Google Patents

Circuito idraulico di comando per organi di lavoro di macchine movimento terra

Info

Publication number
IT1261382B
IT1261382B ITTO930970A ITTO930970A IT1261382B IT 1261382 B IT1261382 B IT 1261382B IT TO930970 A ITTO930970 A IT TO930970A IT TO930970 A ITTO930970 A IT TO930970A IT 1261382 B IT1261382 B IT 1261382B
Authority
IT
Italy
Prior art keywords
control circuit
hydraulic
earth
hydraulic control
working bodies
Prior art date
Application number
ITTO930970A
Other languages
English (en)
Inventor
Giovanni Testa
Elio Bertotti
Original Assignee
Vickers Systems Division Trino
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.)
Filing date
Publication date
Application filed by Vickers Systems Division Trino filed Critical Vickers Systems Division Trino
Priority to ITTO930970A priority Critical patent/IT1261382B/it
Publication of ITTO930970A0 publication Critical patent/ITTO930970A0/it
Priority to EP94309612A priority patent/EP0664401A3/en
Priority to US08/372,387 priority patent/US6134887A/en
Publication of ITTO930970A1 publication Critical patent/ITTO930970A1/it
Application granted granted Critical
Publication of IT1261382B publication Critical patent/IT1261382B/it

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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/35—Directional control combined with flow control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5159—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Circuito idraulico di comando per organi di lavoro di macchine movimento terra del tipo "bakhoe loader", con una prima ed una seconda sezione di comando (9, 10) di primi e secondi attuatori idraulici lineari (1, 2; 3-8) tramite rispettivi primi e secondi distributori idraulici a spola (21, 22; 23-28), e mezzi di alimentazione di un fluido idraulico sotto pressione (11) alle due sezioni di comando (9, 10) attraverso una linea di alimentazione in parallelo (13), ed inoltre con un circuito di controllo "load sensing" associato a detti primi e secondi distributori. Il circuito di comando comprende un dispositivo di collegamento in serie e parallelo (36) del circuito di controllo "load sensing" (16), e di ulteriori dispositivi opzionali che assicurano una migliore funzionalità operativa degli organi di lavoro della macchina.(Fig. 1).
ITTO930970A 1993-12-21 1993-12-21 Circuito idraulico di comando per organi di lavoro di macchine movimento terra IT1261382B (it)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ITTO930970A IT1261382B (it) 1993-12-21 1993-12-21 Circuito idraulico di comando per organi di lavoro di macchine movimento terra
EP94309612A EP0664401A3 (en) 1993-12-21 1994-12-21 A hydraulic control circuit for working members of earth-moving machines
US08/372,387 US6134887A (en) 1993-12-21 1994-12-21 Hydraulic control circuit for working members of earth-moving machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO930970A IT1261382B (it) 1993-12-21 1993-12-21 Circuito idraulico di comando per organi di lavoro di macchine movimento terra

Publications (3)

Publication Number Publication Date
ITTO930970A0 ITTO930970A0 (it) 1993-12-21
ITTO930970A1 ITTO930970A1 (it) 1995-06-21
IT1261382B true IT1261382B (it) 1996-05-20

Family

ID=11411952

Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO930970A IT1261382B (it) 1993-12-21 1993-12-21 Circuito idraulico di comando per organi di lavoro di macchine movimento terra

Country Status (3)

Country Link
US (1) US6134887A (it)
EP (1) EP0664401A3 (it)
IT (1) IT1261382B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1289120B1 (it) * 1996-07-04 1998-09-25 Fki Fai Komatsu Ind Spa Circuito idraulico di comando per organi di lavoro,in particolare in macchine movimento terra
FR2754571B1 (fr) * 1996-10-16 1998-12-24 Rexroth Sigma Dispositif de distribution hydraulique multiple
JP2000012175A (ja) * 1998-06-24 2000-01-14 Komatsu Ltd コネクタおよびこのコネクタを用いた操作パターン変更装置およびデータ変更装置および故障箇所判定装置
GB2352275B (en) * 1999-07-17 2004-02-18 Agco Gmbh & Co Hydraulic system for utility vehicles
GB2436856A (en) * 2006-04-07 2007-10-10 Agco Gmbh Pressure control for system with primary and secondary consumers
WO2012125792A2 (en) 2011-03-15 2012-09-20 Husco International, Inc. Multiple function hydraulic system with a variable displacement pump and a hydrostatic pump-motor
US8899034B2 (en) 2011-12-22 2014-12-02 Husco International, Inc. Hydraulic system with fluid flow summation control of a variable displacement pump and priority allocation of fluid flow
DE102013220750A1 (de) * 2013-10-15 2015-04-16 Robert Bosch Gmbh Ventilblock mit einer Ventilanordnung
JP6656913B2 (ja) * 2015-12-24 2020-03-04 株式会社クボタ 作業機の油圧システム
DE102017126505B4 (de) * 2017-11-10 2023-06-15 Syn Trac Gmbh Hydrauliksystem für ein Fahrzeug sowie ein Fahrzeug mit einem solchen Hydrauliksystem
US11815107B2 (en) 2018-11-14 2023-11-14 Shimadzu Corporation Fluid control device
JP7825413B2 (ja) * 2021-12-07 2026-03-06 キャタピラー エス エー アール エル 作業機械における油圧制御システム

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161256A (en) * 1977-10-04 1979-07-17 Cascade Corporation Fluid power system having multiple, separately controllable double-acting fluid motors and reduced number of fluid conduits
US4343151A (en) * 1980-05-16 1982-08-10 Caterpillar Tractor Co. Series - parallel selector for steering and implement
US4463557A (en) * 1983-08-12 1984-08-07 Deere & Company Open center hydraulic system
DE3421502C2 (de) * 1984-06-08 1986-11-20 Mannesmann Rexroth GmbH, 8770 Lohr Hydraulische Vorrangsteuereinrichtung für mindestens zwei Servomotoren
US5081839A (en) * 1990-01-29 1992-01-21 Caterpillar Inc. Pressure compensated hydraulic system

Also Published As

Publication number Publication date
EP0664401A3 (en) 1995-09-27
ITTO930970A1 (it) 1995-06-21
US6134887A (en) 2000-10-24
ITTO930970A0 (it) 1993-12-21
EP0664401A2 (en) 1995-07-26

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19990128