EP2218675A3 - Hydrostatic drive system for a mobile work machine - Google Patents

Hydrostatic drive system for a mobile work machine Download PDF

Info

Publication number
EP2218675A3
EP2218675A3 EP10000411.8A EP10000411A EP2218675A3 EP 2218675 A3 EP2218675 A3 EP 2218675A3 EP 10000411 A EP10000411 A EP 10000411A EP 2218675 A3 EP2218675 A3 EP 2218675A3
Authority
EP
European Patent Office
Prior art keywords
drive system
pump
work machine
mobile work
valve
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP10000411.8A
Other languages
German (de)
French (fr)
Other versions
EP2218675A2 (en
Inventor
Markus Schwab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STILL GmbH
Original Assignee
STILL GmbH
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 STILL GmbH filed Critical STILL GmbH
Publication of EP2218675A2 publication Critical patent/EP2218675A2/en
Publication of EP2218675A3 publication Critical patent/EP2218675A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
    • 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
    • F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing 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
    • F15B2211/60—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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Die Erfindung betrifft ein hydrostatisches Antriebssystem einer mobilen Arbeitsmaschine, insbesondere eines Flurförderzeugs, mit einer Pumpe (1) und mindestens einem von der Pumpe (1) versorgbaren Verbraucher einer Arbeitshydraulik (2), der mittels eines elektro-hydraulisch betätigbaren Steuerventils (11), insbesondere eines Wegeventils, betätigbar ist, wobei zur Betätigung des Steuerventils (11) mindestens ein elektrisch betätigbares Vorsteuerventil vorgesehen ist, das mit einer Steuerdruckversorgungsleitung (25) in Verbindung steht. Zur Lösung der Aufgabe, ein derartiges Antriebssystem zur Verfügung zu stellen, dass hinsichtlich des Energieverbrauchs und der Wärmebelastung des Druckmittels verbessert ist und einen geringen Bauaufwand aufweist, wird erfindungsgemäß vorgeschlagen, dass zur Erzeugung des in der Steuerdruckversorgungsleitung (25) anstehenden Steuerdrucks ein mit der Förderleitung (4) der Pumpe (1) in Verbindung stehendes Druckminderventil (26) vorgesehen ist.

Figure imgaf001
The invention relates to a hydrostatic drive system of a mobile work machine, in particular of a truck, with a pump (1) and at least one of the pump (1) supplied consumers of a working hydraulics (2), by means of an electro-hydraulically actuated control valve (11), in particular a directional control valve, is operable, wherein for actuating the control valve (11) at least one electrically actuable pilot valve is provided, which communicates with a control pressure supply line (25). To solve the task of providing such a drive system available that is improved in terms of energy consumption and heat load of the pressure medium and has a low construction cost, the invention proposes that for generating the in the control pressure supply line (25) pending control pressure with the delivery line (4) the pump (1) communicating pressure reducing valve (26) is provided.
Figure imgaf001
EP10000411.8A 2009-02-11 2010-01-18 Hydrostatic drive system for a mobile work machine Withdrawn EP2218675A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009008514.9A DE102009008514B4 (en) 2009-02-11 2009-02-11 Hydrostatic drive system of a mobile work machine

Publications (2)

Publication Number Publication Date
EP2218675A2 EP2218675A2 (en) 2010-08-18
EP2218675A3 true EP2218675A3 (en) 2013-10-16

Family

ID=42198929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10000411.8A Withdrawn EP2218675A3 (en) 2009-02-11 2010-01-18 Hydrostatic drive system for a mobile work machine

Country Status (2)

Country Link
EP (1) EP2218675A3 (en)
DE (1) DE102009008514B4 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011056068B4 (en) 2011-12-06 2022-08-11 Still Gesellschaft Mit Beschränkter Haftung Hydraulic system of a mobile working machine
DE102011056069B4 (en) 2011-12-06 2022-08-04 Still Gesellschaft Mit Beschränkter Haftung Method for operating a hydraulic system of a mobile working machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524213A (en) * 1978-08-04 1980-02-21 Diesel Kiki Co Ltd Apparatus for controlling speed of hydraulic actuator for remote control
US4343151A (en) * 1980-05-16 1982-08-10 Caterpillar Tractor Co. Series - parallel selector for steering and implement
US4635440A (en) * 1983-06-14 1987-01-13 Linde Aktiengesellschaft Dual consumer hydraulic mechanisms
US5060475A (en) * 1990-05-29 1991-10-29 Caterpillar Inc. Pilot control circuit for load sensing hydraulic systems
DE10047631A1 (en) * 2000-09-26 2002-04-11 Linde Ag Hydraulic system for battery-operated electric load conveying vehicle has hydraulic unit acting as pump and motor coupled to electrical unit acting as motor and generator
DE10224731A1 (en) * 2001-06-29 2003-01-16 Linde Ag Method by which a hydraulic operating circuit is protected from overload has a safety valve system incorporated which reacts to a load signal
DE10151831A1 (en) * 2001-10-20 2003-05-08 Still Gmbh Hydraulic system for an industrial truck has an additional connection valve linking the load pressure line to the transport line so that a storage brake can be activated without simultaneous movement of a hydraulic load

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3708570C2 (en) 1987-03-17 1995-11-16 Bosch Gmbh Robert Electro-hydraulic device for actuating a piston-like part which can be displaced in a housing bore
DE3905654C2 (en) 1989-02-24 1998-10-29 Bosch Gmbh Robert Hydraulic control device
DE19748782A1 (en) 1997-11-05 1999-05-06 Clark Material Handling Gmbh Hydraulic lifting arrangement for battery-powered fork-lift truck or similar

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524213A (en) * 1978-08-04 1980-02-21 Diesel Kiki Co Ltd Apparatus for controlling speed of hydraulic actuator for remote control
US4343151A (en) * 1980-05-16 1982-08-10 Caterpillar Tractor Co. Series - parallel selector for steering and implement
US4635440A (en) * 1983-06-14 1987-01-13 Linde Aktiengesellschaft Dual consumer hydraulic mechanisms
US5060475A (en) * 1990-05-29 1991-10-29 Caterpillar Inc. Pilot control circuit for load sensing hydraulic systems
DE10047631A1 (en) * 2000-09-26 2002-04-11 Linde Ag Hydraulic system for battery-operated electric load conveying vehicle has hydraulic unit acting as pump and motor coupled to electrical unit acting as motor and generator
DE10224731A1 (en) * 2001-06-29 2003-01-16 Linde Ag Method by which a hydraulic operating circuit is protected from overload has a safety valve system incorporated which reacts to a load signal
DE10151831A1 (en) * 2001-10-20 2003-05-08 Still Gmbh Hydraulic system for an industrial truck has an additional connection valve linking the load pressure line to the transport line so that a storage brake can be activated without simultaneous movement of a hydraulic load

Also Published As

Publication number Publication date
DE102009008514B4 (en) 2019-08-14
DE102009008514A1 (en) 2010-08-12
EP2218675A2 (en) 2010-08-18

Similar Documents

Publication Publication Date Title
EP2233641A3 (en) Hydraulic control assembly for the screed of a road finisher
EP3339516A3 (en) System and method for control of a work vehicle
EP3196482A3 (en) System for controlling the supply of hydraulic fluid to a work vehicle implement
WO2010141405A4 (en) Hydraulic oilfield lift pump
EP4310263A3 (en) Boom potential energy recovery of hydraulic excavator
EP2256260A3 (en) Controller for hydraulic pump horsepower and work machine provided therewith
EP3305994A3 (en) Control system for construction machinery and control method for construction machinery
EP2239467A3 (en) Hydraulic control device
EP2374692A3 (en) Mobile work machine, in particular industrial truck
EP1577257A3 (en) Hydraulic lifting device for battery-powered industrial vehicle
US11407192B2 (en) Hydraulic extrusion press and method for operating a hydraulic extrusion press
EP2628862A3 (en) Mobile work machine with energy recovery for driving the motor cooling
EP2503161A3 (en) Hydraulic control valve device
EP2375086A3 (en) Hydraulic assembly
EP1970571A3 (en) Hydraulic circuit for construction machine
EP2218675A3 (en) Hydrostatic drive system for a mobile work machine
EP2287105A3 (en) Device for lifting and lowering loads
EP2384968A3 (en) Pitch Control Mechanism
EP2698545A3 (en) Device for controlling the charge state of at least one pressure accumulator
EP2952638A3 (en) Hybrid construction machine
EP2886382A3 (en) Drive system, in particular for a self-propelled construction machine, in particular soil compactor
EP2444360A3 (en) Load-sensing regulated hydrostatic drive system
EP3095999A3 (en) Hydrostatic drive system
CN203346002U (en) Manual and automatic hydraulic jack
EP2256082A3 (en) Hydrostatic drive system for a mobile work machine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

RIC1 Information provided on ipc code assigned before grant

Ipc: B66F 9/22 20060101AFI20130909BHEP

Ipc: F15B 11/028 20060101ALI20130909BHEP

Ipc: F15B 20/00 20060101ALI20130909BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140417