EP1793050B1 - Cylindre hydraulique avec amortissement de fin de course. - Google Patents

Cylindre hydraulique avec amortissement de fin de course. Download PDF

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Publication number
EP1793050B1
EP1793050B1 EP06017903.3A EP06017903A EP1793050B1 EP 1793050 B1 EP1793050 B1 EP 1793050B1 EP 06017903 A EP06017903 A EP 06017903A EP 1793050 B1 EP1793050 B1 EP 1793050B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic cylinder
hydraulic
valve
piston
plunger
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.)
Active
Application number
EP06017903.3A
Other languages
German (de)
English (en)
Other versions
EP1793050A3 (fr
EP1793050A2 (fr
Inventor
Michael Stucke
Oliver Schwenkkrauss
Hans-Peter Lavergne
Thomas Zitterbart
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.)
Liebherr Hydraulikbagger GmbH
Original Assignee
Liebherr Hydraulikbagger 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 Liebherr Hydraulikbagger GmbH filed Critical Liebherr Hydraulikbagger GmbH
Publication of EP1793050A2 publication Critical patent/EP1793050A2/fr
Publication of EP1793050A3 publication Critical patent/EP1793050A3/fr
Application granted granted Critical
Publication of EP1793050B1 publication Critical patent/EP1793050B1/fr
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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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E02F9/2214—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing the shock generated at the stroke end
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/046—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member
    • F15B11/048—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed depending on the position of the working member with deceleration 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/421—Flow control characterised by the type of actuation mechanically
    • F15B2211/424—Flow control characterised by the type of actuation mechanically actuated by an output member of the circuit
    • 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
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/755—Control of acceleration or deceleration of the output member
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions
    • F15B2211/853—Control during special operating conditions during stopping

Definitions

  • the invention relates to a hydraulic cylinder with a piston and a piston rod according to the preamble of claim 1.
  • end position damping In order to avoid an abrupt stopping of a movement caused by a hydraulic cylinder when reaching the end position of the piston in the hydraulic cylinder, it is already known to provide end position damping. With simple cylinders and small piston speeds, stop rings are usually sufficient to catch the pistons at the stroke end. For larger piston speeds, however, a special cushioning is constructive. Here there is the possibility of damping by means of so-called damping pins on the piston rods. Frequently, hydraulic end position dampers are used. In this case, the kinetic energy of the piston mass is reduced by the fact that the rest of the volume displaced by the piston oil volume by gaps or throttles, which are provided in the end position of the cylinder, are passed.
  • Such a hydraulic cylinder is off GB 519,321 A known.
  • the object of the invention is now to equip conventional hydraulic cylinder optionally with a bottom-side damping.
  • series hydraulic cylinders without end cushioning to convert accordingly.
  • the throttle valve may consist of a displaceable in a housing via a plunger valve unit, which by actuation of the plunger in the Fluid path of the hydraulic fluid is movable to throttle in this position, the hydraulic fluid flow rate.
  • the end position damping acts only at the stroke end, a check valve is integrated in the throttle valve, over which the cushioning can be bypassed at Hubbeginn.
  • the plunger via which the displaceable valve unit can be brought into the throttle valve shortly before reaching the end position of the piston in the throttle position, acted upon by a gripper mechanism of a construction or handling machine.
  • a gripper mechanism of a construction or handling machine acted upon by a gripper mechanism of a construction or handling machine.
  • a hydraulic cylinder 10 is shown schematically.
  • a piston 12 with a piston rod 14 is slidably disposed.
  • a junction point A in the hydraulic cylinder 10 opens a hydraulic line 16.
  • a junction point B of the hydraulic cylinder 10 opens a hydraulic line 18.
  • the hydraulic lines 16 and 18 are part of a known per se in the prior art hydraulic circuit having a hydraulic sump 20 in the illustrated embodiment.
  • a control valve 22 serves for switching.
  • a switchable throttle valve 24 is integrated between the switching valve 22 and the mouth B of the hydraulic line 18.
  • the switchable throttle valve 24 has a housing 26, into which mouth points P and Z of the line 18 lead.
  • the housing 26 has a centrally mounted cylindrical chamber 28, in which the throttle valve 30 is movable in the longitudinal direction back and forth.
  • the length of the cylindrical chamber 28 and the throttle valve 30 is dimensioned so that the throttle valve between two end positions is movable back and forth.
  • the respective end positions are in the FIGS. 2 and 3 shown.
  • the throttle valve 30 In the opposite end position according to FIG. 3 is the throttle valve 30 is pushed between the orifice points P and Z, so that the hydraulic oil flowing from P to Z is throttled through this throttle valve 30.
  • the throttle valve 30 is only when the piston 12 is short of the end stop, in the end position according to FIG. 3 pressed.
  • a mechanically operated plunger 32 which transmits the movement on a displaceably mounted in the housing 26 valve piston.
  • the plunger can be actuated for example by a gripping mechanism of a construction vehicle or a handling vehicle, such as a wooden gripper. This operation is kinematically switched so that it takes place shortly before reaching the end stop and thus only leads to damping at this time.
  • valve piston 34 always in the in FIG. 2 shown end position, unless it is on the plunger 32 in the direction of the end position according to FIG. 3 is forcibly moved.

Landscapes

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

Claims (3)

  1. Cylindre hydraulique (10) comprenant un piston (12) doté d'une tige de piston (14), deux conduites hydrauliques (16, 18) avec une soupape de distribution (22) étant raccordées au cylindre hydraulique (10), une soupape d'étranglement (30) manoeuvrable étant insérée dans au moins une conduite hydraulique (18), la soupape d'étranglement pouvant être commutée d'une position dans laquelle le fluide hydraulique peut circuler sans entraves à une position dans laquelle la soupape d'étranglement (24) est active, la soupape d'étranglement (24) étant composée d'une unité de soupape coulissante dans un boîtier (26) par le biais d'un poussoir (32), qui peut être déplacée par actionnement du poussoir (32) dans la voie d'écoulement du fluide hydraulique, pour, dans cette position, étrangler le débit volumétrique de fluide hydraulique,
    caractérisé en ce que
    le poussoir (32) peut être soumis à l'action d'un mécanisme de grappin d'une machine de chantier ou de manutention.
  2. Cylindre hydraulique selon la revendication 1, caractérisé en ce qu'une soupape de non-retour est intégrée dans la soupape d'étranglement.
  3. Machine de chantier ou de manutention comprenant au moins un cylindre hydraulique (10) selon l'une des revendications précédentes.
EP06017903.3A 2005-12-05 2006-08-28 Cylindre hydraulique avec amortissement de fin de course. Active EP1793050B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200520018999 DE202005018999U1 (de) 2005-12-05 2005-12-05 Hydraulikzylinder mit Endlagendämpfung

Publications (3)

Publication Number Publication Date
EP1793050A2 EP1793050A2 (fr) 2007-06-06
EP1793050A3 EP1793050A3 (fr) 2011-08-03
EP1793050B1 true EP1793050B1 (fr) 2015-10-14

Family

ID=37600749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06017903.3A Active EP1793050B1 (fr) 2005-12-05 2006-08-28 Cylindre hydraulique avec amortissement de fin de course.

Country Status (2)

Country Link
EP (1) EP1793050B1 (fr)
DE (1) DE202005018999U1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB519321A (en) * 1937-09-29 1940-03-21 Vickers Inc Improvements in hydraulic feed control system
JPS57161307A (en) * 1981-09-28 1982-10-04 Amada Co Ltd Adjusting device of stroke in cylinder mechanism
US4915014A (en) * 1985-05-08 1990-04-10 Deere & Company Disk harrow hydraulic wing balancing system
DE20114538U1 (de) * 2001-09-03 2001-10-31 Küpper-Weisser GmbH, 78199 Bräunlingen Hydrauliksystem für die Eigengewichtsentlastung von Anbaugeräten
WO2002014698A1 (fr) * 2000-08-15 2002-02-21 Parker Hannifin Ab Systeme d'actionnement pneumatique
WO2004099626A1 (fr) * 2003-05-07 2004-11-18 G.Fluid S.R.L. Clapet anti-retour pilote a obturateur variable
WO2005005843A1 (fr) * 2003-07-10 2005-01-20 Hydac System Gmbh Dispositif de refroidissement de liquide

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465519A (en) * 1967-08-18 1969-09-09 Webster Electric Co Inc Hydraulic flow controlling apparatus
KR920701697A (ko) * 1989-06-26 1992-08-12 가따다 데쯔야 유압 회로 장치
FR2699609B1 (fr) * 1992-12-22 1995-02-10 Hydromo Procédé et dispositif pour la mise en mouvement ou l'arrêt d'un moteur hydraulique entraînant un ensemble présentant une grande inertie.
US6868672B2 (en) * 2003-05-13 2005-03-22 Sauer-Danfoss, Inc. Method of controlling a swinging boom and apparatus for controlling the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB519321A (en) * 1937-09-29 1940-03-21 Vickers Inc Improvements in hydraulic feed control system
JPS57161307A (en) * 1981-09-28 1982-10-04 Amada Co Ltd Adjusting device of stroke in cylinder mechanism
US4915014A (en) * 1985-05-08 1990-04-10 Deere & Company Disk harrow hydraulic wing balancing system
WO2002014698A1 (fr) * 2000-08-15 2002-02-21 Parker Hannifin Ab Systeme d'actionnement pneumatique
DE20114538U1 (de) * 2001-09-03 2001-10-31 Küpper-Weisser GmbH, 78199 Bräunlingen Hydrauliksystem für die Eigengewichtsentlastung von Anbaugeräten
WO2004099626A1 (fr) * 2003-05-07 2004-11-18 G.Fluid S.R.L. Clapet anti-retour pilote a obturateur variable
WO2005005843A1 (fr) * 2003-07-10 2005-01-20 Hydac System Gmbh Dispositif de refroidissement de liquide

Also Published As

Publication number Publication date
DE202005018999U1 (de) 2007-04-12
EP1793050A3 (fr) 2011-08-03
EP1793050A2 (fr) 2007-06-06

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