EP0284460B1 - Mécanisme à fluide sous pression, moteur ou pompe, à plusieurs cylindrées - Google Patents

Mécanisme à fluide sous pression, moteur ou pompe, à plusieurs cylindrées Download PDF

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Publication number
EP0284460B1
EP0284460B1 EP88400431A EP88400431A EP0284460B1 EP 0284460 B1 EP0284460 B1 EP 0284460B1 EP 88400431 A EP88400431 A EP 88400431A EP 88400431 A EP88400431 A EP 88400431A EP 0284460 B1 EP0284460 B1 EP 0284460B1
Authority
EP
European Patent Office
Prior art keywords
undulations
cylinder
slide valve
group
communication
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.)
Expired - Lifetime
Application number
EP88400431A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0284460A1 (fr
Inventor
Louis Bernard Bigo
Bernard René Allart
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.)
Poclain Hydraulics France SA
Original Assignee
Poclain Hydraulics France SA
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 Poclain Hydraulics France SA filed Critical Poclain Hydraulics France SA
Publication of EP0284460A1 publication Critical patent/EP0284460A1/fr
Application granted granted Critical
Publication of EP0284460B1 publication Critical patent/EP0284460B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0447—Controlling
    • F03C1/045—Controlling by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g. series-parallel

Definitions

  • Hydraulic mechanisms motor or pump, are already known which allow several (at least two) separate displacement to be obtained.
  • FR-A-2 481 755 describes and represents a pressurized fluid mechanism, motor or pump, such as a hydraulic motor, with at least two separate displacements, non-zero, capable of being selected, consisting of: at least a first external connection to a source of pressurized fluid and at least a second external connection to a fluid exhaust, at least one cam, the profile of which comprises several successive undulations, said undulations being distributed in at least first and second distinct groups of undulations and each undulation comprising a first ramp and a second ramp; a cylinder block, which is rotatably mounted with respect to said cam about an axis of rotation and which has a plurality of cylinders disposed substantially radially with respect to said axis of rotation; at least one piston being slidably mounted inside each cylinder, being capable of bearing on the cam and delimiting inside said cylinder a working chamber which is connected to a communication face of the cylinder block; a plurality of connecting cylinder conduits.
  • a displacement selection device comprising at least a first displacement selection drawer disposed between said first and second external connections and the first and / or second distribution conduits corresponding to the corrugations of the second group of corrugations; this first displacement selection drawer having a first position capable of corresponding a) to the communication of the first distribution conduits corresponding to the corrugations of the two groups of corrugations with the first external connection, and b) to the communication second distribution conduits corresponding to the corrugations of the two groups of corrugations with the second external connector, and having a second position capable of corresponding to
  • the invention intends to remedy these drawbacks of known mechanisms by providing for a simpler constitution and capable, without costly machining, of ensuring the cubic capacity selections desired by the user, in particular from three distinct non-zero cubic capacities and one zero cubic capacity.
  • the displacement selection device comprises a second displacement selection drawer, which also has two positions and is arranged between the first and second external fittings. and the first and / or second distribution conduits corresponding to the corrugations of the first group of corrugations, this second displacement selection drawer having a first position which corresponds to a) the communication of the first distribution conduits corresponding to the corrugations of the first group of corrugations with the first external connection, b) the communication of the second distribution conduits corresponding to the corrugations of said first group of corrugations with the second external connection, and having a second position which corresponds to the insulation of the first distribution conduits corresponding to the undulations of the first group of undulations with the first external connection and / or with the permanent isolation of the second distribution conduits corresponding to the undulations of said first group of undulations with the second external connection.
  • the invention relates to a pressurized fluid mechanism, motor or pump, such as a hydraulic motor, to at at least two separate cubic capacities, non-zero, capable of being selected, consisting of: at least a first external connection to a source of pressurized fluid and at least a second external connection to a fluid exhaust; at least one cam, the profile of which comprises several successive undulations, said undulations being distributed in at least a first and a second distinct group of undulations and each undulation comprising a first ramp and a second ramp; a cylinder block, which is rotatably mounted relative to said cam around a axis of rotation and which comprises a plurality of cylinders arranged substantially radially with respect to said axis of rotation; at least one piston being slidably mounted inside each cylinder, being capable of bearing on the cam and delimiting inside said cylinder a working chamber which is connected to a communication face of the cylinder block; a pressurized fluid mechanism, motor or pump, such as a hydraulic motor, to at at least two
  • all the pistons 14 have the same diameter, so that the volume of fluid displaced by a piston is proportional to the stroke of this piston along a ripple, with the same coefficient of proportionality (equal to the piston section) for all corrugations.
  • any ripple 12a - 12d gives a piston, which travels it, a stroke C1 (return), while some ripple 12c - 12b gives a piston, which travels it, a stroke C2 (go -return) different from C1.
  • the drawers 17 and 18 are designed as rotary fluid distribution drawers, similar to that shown in FR-A-1 572 390.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)
EP88400431A 1987-02-25 1988-02-24 Mécanisme à fluide sous pression, moteur ou pompe, à plusieurs cylindrées Expired - Lifetime EP0284460B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8702509 1987-02-25
FR8702509A FR2611816B1 (fr) 1987-02-25 1987-02-25 Mecanisme a fluide sous pression, moteur ou pompe, a plusieurs cylindrees

Publications (2)

Publication Number Publication Date
EP0284460A1 EP0284460A1 (fr) 1988-09-28
EP0284460B1 true EP0284460B1 (fr) 1990-11-28

Family

ID=9348310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400431A Expired - Lifetime EP0284460B1 (fr) 1987-02-25 1988-02-24 Mécanisme à fluide sous pression, moteur ou pompe, à plusieurs cylindrées

Country Status (6)

Country Link
US (1) US4898076A (fi)
EP (1) EP0284460B1 (fi)
JP (1) JPS63227965A (fi)
DE (1) DE3861148D1 (fi)
FI (1) FI880881A (fi)
FR (1) FR2611816B1 (fi)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644210B1 (fr) * 1989-03-07 1994-06-03 Poclain Hydraulics Sa Dispositif d'immobilisation mutuelle de deux elements montes a rotation relative
DE4004932C2 (de) * 1990-02-16 1995-04-13 Rexroth Mannesmann Gmbh Radialkolbenmaschine
FR2669683B1 (fr) * 1990-11-23 1994-11-18 Poclain Hydraulics Sa Mecanisme a fluide sous pression dit "a came tournante".
FR2706538B1 (fr) * 1993-06-09 1995-09-01 Poclain Hydraulics Sa Mécanisme à fluide sous pression tel qu'un moteur ou une pompe, réversible, à au moins deux cylindrées de fonctionnement.
DE4332324A1 (de) * 1993-09-23 1994-10-20 Bosch Gmbh Robert Radialkolbenmaschine
JP3127842B2 (ja) * 1996-11-01 2001-01-29 ダイキン工業株式会社 カムモータ装置
FR2794496B1 (fr) * 1999-06-04 2001-08-24 Poclain Hydraulics Ind Selecteur de cylindree pour un moteur hydraulique evitant un freinage brutal lors du passage de petite cylindree en grande cylindree
FR2834012B1 (fr) * 2001-12-24 2004-03-19 Poclain Hydraulics Ind Moteur hydraulique a pistons radiaux
FR2836960B1 (fr) * 2002-03-08 2004-07-09 Poclain Hydraulics Ind Moteur hydraulique a cylindres radiaux etages
FR2891593B1 (fr) * 2005-10-03 2007-12-21 Poclain Hydraulics Ind Soc Par Dispositif de gestion de la cylindree d'un moteur hydraulique
US8052401B2 (en) * 2005-10-11 2011-11-08 Parker-Hannifin Corporation Double-acting radial piston hydraulic apparatus
FR2897133B1 (fr) * 2006-02-06 2008-03-14 Staubli Faverges Sca Procede de fabrication d'un reducteur, reducteur et robot incorporant un tel reducteur
DE102006058076A1 (de) * 2006-12-07 2008-06-19 Zf Friedrichshafen Ag Hydraulischer Radialkolbenmotor
FR2967228B1 (fr) * 2011-12-21 2013-03-29 Poclain Hydraulics Ind Drain pour montage d'etancheite dynamique
FR3019594B1 (fr) * 2014-04-02 2016-04-08 Poclain Hydraulics Ind Section additionnelle de poussee
FR3030645B1 (fr) * 2014-12-17 2019-10-11 Poclain Hydraulics Industrie Appareil hydraulique a pistons radiaux
FR3043433B1 (fr) 2015-11-10 2017-12-08 Poclain Hydraulics Ind Dispositif de distribution pour une machine hydraulique et machine hydraulique equipee d'un tel dispositif

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127268A5 (fi) * 1971-03-02 1972-10-13 Poclain Sa
US3760691A (en) * 1971-12-17 1973-09-25 Deere & Co Step variable displacement hydraulic motor
FI64840C (fi) * 1979-08-01 1984-01-10 Partek Ab Hydraulisk motor
FR2481755A1 (fr) * 1980-04-30 1981-11-06 Poclain Hydraulics Sa Moteur a fluide sous pression muni d'un dispositif de selection de sa vitesse de rotation
FR2588616B1 (fr) * 1985-10-16 1988-01-08 Poclain Hydraulics Sa Mecanisme, moteur a pompe, a au moins deux cylindrees actives distinctes.

Also Published As

Publication number Publication date
FI880881A (fi) 1988-08-26
FR2611816A1 (fr) 1988-09-09
JPS63227965A (ja) 1988-09-22
US4898076A (en) 1990-02-06
EP0284460A1 (fr) 1988-09-28
FR2611816B1 (fr) 1989-07-13
FI880881A0 (fi) 1988-02-25
DE3861148D1 (de) 1991-01-10

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