EP0284460A1 - Druckflüssigkeitsmechanismus, Pumpe oder Motor mit mehreren Verdrängungsvolumen - Google Patents

Druckflüssigkeitsmechanismus, Pumpe oder Motor mit mehreren Verdrängungsvolumen Download PDF

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Publication number
EP0284460A1
EP0284460A1 EP88400431A EP88400431A EP0284460A1 EP 0284460 A1 EP0284460 A1 EP 0284460A1 EP 88400431 A EP88400431 A EP 88400431A EP 88400431 A EP88400431 A EP 88400431A EP 0284460 A1 EP0284460 A1 EP 0284460A1
Authority
EP
European Patent Office
Prior art keywords
undulations
drawer
group
corrugations
external connection
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.)
Granted
Application number
EP88400431A
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English (en)
French (fr)
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EP0284460B1 (de
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
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Publication date
Application filed by Poclain Hydraulics France SA filed Critical Poclain Hydraulics France SA
Publication of EP0284460A1 publication Critical patent/EP0284460A1/de
Application granted granted Critical
Publication of EP0284460B1 publication Critical patent/EP0284460B1/de
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 cylinder conduits each connecting a working chamber to said communication face of the
  • the invention intends to remedy these drawbacks of known mechanisms by providing for a simpler and more capable constitution, without costly machining, to ensure 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 wave group ulations 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 about an axis of rotation and which comprises a plurality of cylinders arranged substantially radially by report 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 pluralit
  • each of the first and second displacement selection drawers is movably mounted in a bore formed in a drawer body, while, for each bore, first, second and third transit chambers are formed in said body and open into said bore; c) a communication chamber is provided in each drawer and opens at its periphery; d) the following permanent connections are made: from the first transit chamber corresponding to each drawer with the first external connection, from the second transit chamber corresponding to the first drawer with the second distribution enclosure, from
  • the engine shown in Figures 1 to 5 includes: - a three-part casing 1 a , 1 b , 1 c assembled by screws 2; - An output shaft 4, rotatably mounted relative to the housing about a geometric axis 9, by means of two roller bearings 5; - A cylinder block 6, which is mounted on one end of the output shaft 4, inside the casing and provided with grooves 7, which is made integral in rotation with said output shaft by means complementary grooves 8 of said output shaft and which is thus mounted for rotation about the geometric axis 9; - A distribution glass 10, which is capable of oscillating very slightly parallel to the axis 9, and which is made integral in rotation with the part 1 c of the casing by means of notches and associated lugs 11, of which are provided these two pieces; - a cam 12 having, in this case, six undulations which follow one another continuously, being distributed in two groups of undulations 12 a - 12 d and 12 c - 12 b , each undulation at 12 d of the first group being
  • each displacement selection drawer has a communication chamber, formed by an intermediate groove, capable, depending on the position of the corresponding drawer, to connect either the first and second corresponding transit chambers, or the second and third transit chambers: these are the communication chambers 30 of the first displacement selection drawer 17, and 31 of the second displacement selection drawer 18; each displacement selection drawer 17, 18 can be placed in a first position (
  • the first displacement selection drawer 17, placed in its first position (FIGS. 1 and 7, predominantly action of the spring 32), connects the first 24 and second transit chambers 25 which correspond to it, this by means of its chamber communication 30; .
  • the first displacement selection drawer 17, placed in its second position (FIGS. 6 and 8, predominant action of the piloting fluid contained in the piloting chamber 34), connects the second 25 and third transit chambers 26 which correspond, this by means of its communication chamber 30;
  • the second displacement selection drawer 18, placed in its first position (FIGS. 1 and 6, predominantly action of the spring 33) connects the first 27 and second transit chambers 28 which correspond to it, this by means of its chamber communication 31, .
  • the second displacement selection drawer 18, placed in its second position (FIGS. 7 and 8, predominant action of the pilot fluid contained in the pilot chamber 35), connects the second 28 and third transit chambers 29 which correspond, this by means of its communication chamber 31.
  • FIG. 9 represents a circuit for controlling and supplying fluid to the engine which has just been described.
  • This circuit includes: - a main pump 52; - a main fluid distributor 53 with three positions; - a first pilot pump 54; - a first pilot valve 55 with two positions; - a second pilot pump 56; - A second control valve 57 two positions; - a hydraulic fluid reservoir 58.
  • the suction pipe 59 of the main pump 52 connects the latter to the reservoir 58; - the discharge pipe 60 of the main pump 52 connects the latter to the main distributor 53; - The suction duct 61 of the first pilot pump 54 connects the latter to the reservoir 58; - The discharge conduit 62 of the first pilot pump 54 connects the latter to the first pilot distributor 55; - The suction pipe 63 of the second pilot pump 56 connects the latter to the reservoir 58; - The discharge conduit 64 of the second pilot pump 56 connects the latter to the second pilot distributor 57; - conduits 65, 66 and 67 connect the main distributor 53, the first 55 and second pilot distributors 57 to the reservoir 58, respectively; - conduits 46 and 48 are connected to the main distributor 53; - The conduits 36 and 37 are connected to the first 55 and second pilot distributors 57, respectively.
  • the three positions of the main distributor 53 correspond: - The first position, when the conduits 60 and 46 are put into communication, and, conduits 48 and 65; - The second position, to close conduits 46 and 48, and, to connect conduits 60 and 65; and - the third position, when the conduits 60 and 48 are put into communication, and, conduits 46 and 65.
  • the two positions of the first control valve 55 correspond: - The first position, when the conduits 36, 62 and 66 are put into communication; and, - the second position, when the conduits 62 and 36 are placed in communication, and when the conduit 66 is closed.
  • the two positions of the second pilot control valve 57 correspond: - The first position, when the conduits 37, 64 and 67 are put into communication; and, - the second position, when the conduits 64 and 37 are placed in communication, and when the conduit 67 is closed.
  • 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 12 a - 12 d gives a piston which travels it a stroke C1 (return), while some ripple 12 c - 12 b gives a piston which travels it a race C2 (round trip) 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 Druckflüssigkeitsmechanismus, Pumpe oder Motor mit mehreren Verdrängungsvolumen Expired - Lifetime EP0284460B1 (de)

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 true EP0284460A1 (de) 1988-09-28
EP0284460B1 EP0284460B1 (de) 1990-11-28

Family

ID=9348310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400431A Expired - Lifetime EP0284460B1 (de) 1987-02-25 1988-02-24 Druckflüssigkeitsmechanismus, Pumpe oder Motor mit mehreren Verdrängungsvolumen

Country Status (6)

Country Link
US (1) US4898076A (de)
EP (1) EP0284460B1 (de)
JP (1) JPS63227965A (de)
DE (1) DE3861148D1 (de)
FI (1) FI880881A7 (de)
FR (1) FR2611816B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4332324A1 (de) * 1993-09-23 1994-10-20 Bosch Gmbh Robert Radialkolbenmaschine
FR2706538A1 (fr) * 1993-06-09 1994-12-23 Poclain Hydraulics Sa Mécanisme à fluide sous pression tel qu'un moteur ou une pompe, réversible, à au moins deux cylindrées de fonctionnement.
FR2836960A1 (fr) 2002-03-08 2003-09-12 Poclain Hydraulics Ind Moteur hydraulique a cylindres radiaux etages
EP3190292A1 (de) 2015-11-10 2017-07-12 Poclain Hydraulics Industrie Verteilvorrichtung für eine hydraulische maschine, und mit einer solchen vorrichtung ausgestattete hydraulische maschine

Families Citing this family (14)

* 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".
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
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
EP4102051A1 (de) * 2021-06-07 2022-12-14 Robert Bosch GmbH Mehrkolbenmaschine mit mindestens drei schaltbaren verdrängungsvolumen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127268A5 (de) * 1971-03-02 1972-10-13 Poclain Sa
GB2055987A (en) * 1979-08-01 1981-03-11 Partek Ab Hydraulic 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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760691A (en) * 1971-12-17 1973-09-25 Deere & Co Step variable displacement hydraulic motor
FR2588616B1 (fr) * 1985-10-16 1988-01-08 Poclain Hydraulics Sa Mecanisme, moteur a pompe, a au moins deux cylindrees actives distinctes.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127268A5 (de) * 1971-03-02 1972-10-13 Poclain Sa
GB2055987A (en) * 1979-08-01 1981-03-11 Partek Ab Hydraulic 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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2706538A1 (fr) * 1993-06-09 1994-12-23 Poclain Hydraulics Sa Mécanisme à fluide sous pression tel qu'un moteur ou une pompe, réversible, à au moins deux cylindrées de fonctionnement.
US5435135A (en) * 1993-06-09 1995-07-25 Poclain Hydraulics Reversible pressurized fluid mechanism such as a motor or a pump and having at least two operating cylinder capacities
DE4332324A1 (de) * 1993-09-23 1994-10-20 Bosch Gmbh Robert Radialkolbenmaschine
FR2836960A1 (fr) 2002-03-08 2003-09-12 Poclain Hydraulics Ind Moteur hydraulique a cylindres radiaux etages
DE10392363B4 (de) * 2002-03-08 2015-01-22 Poclain Hydraulics Industrie Hydraulikmotor mit gestuften Radialzylindern
EP3190292A1 (de) 2015-11-10 2017-07-12 Poclain Hydraulics Industrie Verteilvorrichtung für eine hydraulische maschine, und mit einer solchen vorrichtung ausgestattete hydraulische maschine
US10690109B2 (en) 2015-11-10 2020-06-23 Poclain Hydraulics Industrie Distribution device for a hydraulic machine and a hydraulic machine fitted with such a device

Also Published As

Publication number Publication date
EP0284460B1 (de) 1990-11-28
FR2611816A1 (fr) 1988-09-09
FI880881A7 (fi) 1988-08-26
FR2611816B1 (fr) 1989-07-13
JPS63227965A (ja) 1988-09-22
DE3861148D1 (de) 1991-01-10
US4898076A (en) 1990-02-06
FI880881A0 (fi) 1988-02-25

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