WO2008017766A1 - Mecanisme hydraulique compact a pistons radiaux - Google Patents
Mecanisme hydraulique compact a pistons radiaux Download PDFInfo
- Publication number
- WO2008017766A1 WO2008017766A1 PCT/FR2007/051538 FR2007051538W WO2008017766A1 WO 2008017766 A1 WO2008017766 A1 WO 2008017766A1 FR 2007051538 W FR2007051538 W FR 2007051538W WO 2008017766 A1 WO2008017766 A1 WO 2008017766A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- face
- distribution
- cylinder block
- recess
- cover
- Prior art date
Links
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
- F03C1/0403—Details, component parts specially adapted of such engines
-
- 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
- F03C1/22—Reciprocating-piston liquid engines with movable cylinders or cylinder
- F03C1/24—Reciprocating-piston liquid engines with movable cylinders or cylinder in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders
- F03C1/247—Reciprocating-piston liquid engines with movable cylinders or cylinder in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders with cylinders in star- or fan-arrangement, the connection of the pistons with an actuated element being at the outer ends of the cylinders
Definitions
- the present invention relates to a hydraulic mechanism te! a motor or a pump comprising a cylinder block, which is able to rotate about an axis of rotation in a fixed casing and which has a plurality of cylinders in which pistons are arranged capable of cooperating with a cam integral with the casing, the cylinders being oriented radially with respect to the axis of rotation and being connected by cylinder ducts to communication orifices arranged in a communication face of the cylinder block perpendicular to the axis of rotation, the engine comprising in addition to a distribution cover forming a portion of the housing and an internal non-rotating fluid distributor with respect to said cover, this cover having supply and exhaust ducts which pass through an area corresponding to an axial projection of the cylinders and extend between an outer face and an inner face of said lid, the inner dispenser having dispensing ducts extending between a face of li which cooperates with said inner face to selectively connect the distribution ducts to the supply and exhaust
- the output is provided by an integral member in rotation of the cylinder block.
- This is for example a part of the cylinder block forming a flange, which protrudes from the housing and on which an object to be driven can be fixed, or of a drive shaft which is integral in rotation with the block cylinders.
- the shaft is engaged in a central bore of the cylinder block and is secured thereto by splines.
- This type of motor is very widely used for driving all types of moving parts, in particular moving members of a vehicle.
- Similar mechanisms can be used as a pump for supplying a hydraulic circuit with pressurized fluid. Most of the time, these mechanisms are used on vehicles and are in a congested environment by the other parts and organs of the vehicle. It is therefore desirable that they be compact. It is also desirable that the hydraulic connection be easily accessible, which is why the supply and exhaust ducts have their outlets located in the outer face of the distribution cover.
- the present invention aims to improve the state of the art known for a hydraulic mechanism of the aforementioned type, increasing its compactness.
- a transverse face of the cylinder block has, in an area delimited radially outwards by bottom portions of the cylinders, an axial recess in which at least a portion of the distributor in which there is the distribution face, the communication face being formed in a flat surface of this recess.
- the axial size of the hydraulic mechanism is reduced by a length corresponding to the depth of the axial recess, the latter being used to accommodate a portion of the distributor. This provision does not hinder accessibility to the hydraulic connection of the supply and exhaust ducts, since these remain in the outer face of the distribution cover. It should also be noted that the mass of the mechanism is reduced in the proportions corresponding to the mass of material removed in the recess. It should also be noted that the improvement provided by the invention is perfectly compatible with the use of a conventional distributor, as will be seen later, and with, as output member of the engine, a shaft engaged in the central bore of the cylinder block, whether this shaft is passing through or not.
- the recess extends to a radial plane located between two transverse planes defined by the envelope of at least a portion of the pistons.
- the roll ducts comprise sections of ducts offset towards the side of the cylinder block opposite the recess, with respect to the sliding axes of the cylinders. pistons.
- the distribution cover has, on the side of its inner face, an extension which penetrates into the recess.
- part of the distribution cover required for its good cooperation with the internal distributor can also be housed in the recess, which further increases the compactness of the mechanism.
- the extension of the distribution cover and the recess have facing cylindrical faces, between which a rotational bearing is provided.
- This rotation bearing may, in particular, comprise a bearing or a needle bearing. It improves the rigidity of the cylinder block by supporting the latter in the recess, so as to avoid a possible tendency to tilt or deformation of the cylinder block in operation on the recess side.
- FIG. 1 shows a schematic radial half-section, a mechanism according to the invention according to a first embodiment
- FIG. 2 shows, also for a radial half-section, a variant for the mechanism of Figure 1; and FIG. 3 shows, also for a radial half-section, a mechanism according to a second embodiment of the invention.
- the engine of FIG. 1 comprises a two-part housing, IA and
- Part IA of the casing forms the dispensing cover, and has ducts, 3A and 3B respectively, which extend between an outer face A of the cover IA and an inner face 1 "A of this cover.
- duct 3A is a supply duct while the conduit 3B is an exhaust duct.
- ducts are isolated from each other, even if, in the example shown, the duct 3B has a radial section which is in the same axial space as an end portion of the duct 3A.
- This feature has the advantage of allowing to align the connecting ports of these conduits (for example the orifice 3'A of the duct 3A) located in the outer face A perpendicularly to the axis of rotation A of the block. cylinders, to facilitate connection to external conduits.
- cylinder block 10 which is rotatably mounted about the axis A and which has a plurality of cylinders 12 in which pistons 14 (shown partially) are arranged able to cooperate with the cam 16 which in this case, is formed on a portion of the inner periphery of the part IB of the housing.
- It is a radial piston engine, the cylinders being oriented radially with respect to the axis A. They are connected by roll ducts 18 to communication orifices 20 located in a communication face 10A of the block. cylinders. This face is flat and perpendicular to the axis A. It is seen that the supply and exhaust ducts pass through a zone E (hatched) corresponding to a projection of the cylinders 12, made parallel to the axis A.
- the engine further comprises an internal fluid distributor 22 which is non-rotating, that is to say that it is secured to the housing with respect to the rotation about the axis A.
- This distributor comprises distribution 24A, 24B which extend between a connecting face 22A and a distribution face 22B of the distributor.
- the connecting face 22A cooperates with the inner face 1 "A of the cover IA to selectively connect the distribution ducts to the supply and exhaust ducts, thus showing that the ducts 24A are connected to the duct 3A, while the ducts 24B are connected to the conduit 3B.
- the distribution face 22B is parallel to the communication face 10A of the cylinder block and is arranged against the latter so as to successively communicate the distribution orifices 26 of the distribution conduits located in the face 22B , with the communication ports 20 during the rotation of the cylinder block.
- the internal fluid distributor 22 is of the floor type.
- its connecting face 22A has a stepped external axial surface in which open two grooves, respectively 23A and 23B which are spaced axially
- the orifices of the supply and exhaust ducts 3A, 3B located in the inner face of this distribution cover are respectively facing the grooves 23A and 23B.
- the distribution ducts 24A of a first group are all connected to the groove 23A, and the distribution ducts 24B of the second group are all connected to the groove 23B.
- a distributor having two groups of distribution ducts and two grooves. It could of course comprise three or four groups of distribution ducts, in particular, if the engine is several cylinders of operation, a displacement selector then allowing, in known manner, to communicate between them some of these grooves for obtain the desired cubic capacity.
- the grooves are separated from each other by seals 23 'cooperating with the inner face 1 "A of the distribution cover IA.
- the transverse face 11 of the cylinder block 10, on the side of which is located the internal distributor 22, has an axial recess 30 into which a portion of this distributor penetrates.
- This recess is located in a zone Z which is delimited radially outwards by the bottom portions 12A of the cylinders 12.
- the recess extends only in a part of the cylinder block which is situated radially under the cylinders. It can be seen that the communication face 10A of the cylinder block is situated in a flat surface formed at the bottom of this recess 30.
- the internal fluid distributor 22 enters this recess and, likewise, the dispensing cover IA has, on the side its inner face I 11 A in cooperation with the connecting face of the distributor 22, an extension 32 which enters the recess.
- This extension is in particular an annular extension disposed around a portion of the connecting face 22A of the distributor.
- the extension 32 serves to cover the groove 23B. It is understood that, thanks to this arrangement, the axial length of the motor is reduced by a distance D, corresponding to the penetration length of the distributor 22 in the recess, and therefore to the depth thereof.
- the extension 32 of the distribution cover and the recess 30 have facing cylindrical faces, respectively 32A and 30A, between which a rotational bearing 34 is provided. This is for example a bearing pad or a needle bearing. This bearing is advantageous for, when necessary, to increase the rigidity of the cylinder block taking into account the presence of the recess 30.
- This recess extends inside the face 11 of the cylinder block (that is to say going towards the opposite face 13), to a radial plane P which is situated between two transverse planes P1, P2 defined by the envelope of the pistons.
- the sliding axis Ap of the pistons are substantially located in the plane P defining the recess bottom 30.
- the cylinder block comprises a single row of pistons, but it could comprise several rows, in which case the planes Pl and P2 between which extends the plane P would be defined by the envelope of the first row of pistons.
- the cylinder ducts 18 are offset on the opposite side to the face 11 of the cylinder block with respect to the sliding axes Ap of the pistons. More specifically, the cylinder duct 18 shown has a section 18A which extends radially from the bottom 12A of a cylinder towards the axis A, and a connection section 18B which connects the communication orifice 20 to the section 18A , extending substantially axially. It is the section 18A which is shifted towards the side 13 of the cylinder block opposite the recess 30 with respect to the axis Ap. The section 18A could be slightly inclined with respect to the perpendicular to the axis A.
- FIG. 1 it can be seen that the rotation of the cylinder block 10 with respect to the casing IA, IB is supported by a ball bearing 5.
- the output of the motor is ensured directly by the cylinder block which, for this purpose, has an external flange 10B, to which can be connected a member to be driven, by any suitable connecting means, for example by screws screwed into threads 10'B.
- the bailer ball 5 is thus located radially outwardly of the cylinder block, since it cooperates with the inner periphery of the part IB of the casing in the vicinity of the cam 16, and with the outer periphery of the outer flange portion. 1Ob.
- a dynamic seal 7 seals, being retained relative to the part IB of the housing by a retaining ring 7 '.
- the ball bearing takes both axial forces and radial forces, and has the advantage of being very compact axially.
- it could however be provided to use the invention with other types of bearings, for example conical rolling bearings.
- FIG. 2 is now described, in which elements similar to those of FIG. 1 are designated by the same references.
- the housing is in three parts, IA, IB and IC, assembled by screws 2.
- the distributor 22 is similar to that of Figure 1 and cooperates with its distribution cover formed by the part IA of the housing.
- the cylinder block 10 is also substantially similar to that of Figure 1, except that the flange 1OB serves only to support with the bearing 5 without constituting the output member of the engine. Indeed, this output member is formed by an output shaft 8 which cooperates with the cylinder block by splines 9.
- the sealing is provided by dynamic seals 7 arranged between the shaft 8 and, respectively, part IA and part IC of the housing. In this case, it is a traversing shaft, the cylinder block 10 and the internal distributor 22 being recessed in their centers. It should be noted that the recess 30 of the cylinder block is open on the side of the axis of rotation A.
- the bearing 5 could be replaced by any suitable bearing, for example a conical rolling bearing disposed between the shaft 8 and the part IC of the housing.
- FIG. 3 which differs from that previously described with reference to FIGS. 1 and 2 by the use of a distributor of a different type, will now be described.
- the elements corresponding to those of the preceding figures are assigned the same references, increased by 100.
- two housing portions respectively 101A and 101B we have shown two housing portions respectively 101A and 101B.
- the cam 116 is formed at the inner periphery of the portion 101B and the portion 101A forms a dispensing cover.
- the cylinder block 110 is generally similar to that of FIGS. 1 and 2, with its cylinders 112, its roll ducts 118, its pistons 114 and the recess 130 of the transverse face 111, the recess at the bottom of which is formed the communication face. HOA in which are the communication ports 120. This recess 130 extends in the zone Z bounded radially outwardly by the bottom portions 112A of the cylinders.
- the internal fluid distributor 122 is formed by a disc having axial bores 124 which form the distribution ducts passing through this disc from one side to the other between its connecting face 122A and its distribution face 122B.
- the dispensing orifices 126 of the bores 124 which are located in the distribution face 122B are sequentially in register with the communication orifices 120 of the roll ducts during the rotation of the cylinder blocks.
- the holes 124 open in housings 140 in which are arranged connecting pads 142 bearing against the inner face 101 "A of the distribution cover 101A, this inner face being in this case radially oriented
- a housing 140 in which there is a stud 142 is provided for each of the bores 124.
- the support of the stud against the inner face 101 "A of the distribution cover 101A is made by a helical spring 144.
- Each stud 142 is traversed right through by a bore 143, so that each stud is arranged around the orifice of a supply or exhaust duct located in the inner face 101 "A
- the stud 142 surrounds the orifice 103 "A of the duct 103A
- the duct 103A visible in FIG. and exhaust have a section ra TR dial which extends to the axis A from the outer face 101'A of the distribution cover 101A, until a groove bottom to which are connected a plurality of axially oriented blind holes PB; the open ends of these blind holes form the orifices 103 "A of this duct situated in the inner face IOT'A of the distribution cover 101 A.
- the disc 122 is integrally housed in the recess 130 of the cylinder block 110.
- the distribution cover 101A has, on the side of its inner face 101 "A, an extension 132 which enters the recess. This extension extends around the internal distributor 122 that helps to wedge radially and to position angularly by any known means (not shown). It enters the recess 130 and has a cylindrical face 132A facing a cylindrical face 130A of the recess 130, faces between which a rotational bearing 134 can be arranged if necessary.
- the output of the motor is provided by the shaft 108 which is coupled with the cylinder block 110 by splines 109.
- a dynamic seal 107 disposed between the portion 101A of the housing and the tree 108 is visible.
- Another similar seal is arranged on the opposite side, for example as shown in FIG. 2.
- the embodiment of FIG. 3 using a distributor 122 formed by an annular disc is perfectly compatible with a direct drive by a flange of the cylinder block as shown in Figure 1.
- connection ports of the supply and exhaust ducts are located in a portion of the outer face of the dispensing cover which extends substantially axially and which is located at a distance from the axis A at least substantially equal to the largest radial dimension DR of the cylinder block.
- these connection ports are easily accessible. They are all the more so when, as it is advantageously the case, they are in the same zone of this external face, for example by being arranged on a flat surface.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Motors (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200780024167XA CN101479469B (zh) | 2006-06-28 | 2007-06-27 | 带有径向活塞的紧凑型液压机构 |
US12/305,424 US8079298B2 (en) | 2006-06-28 | 2007-06-27 | Compact hydraulic mechanism with radial pistons |
EP07823522A EP2038547A1 (fr) | 2006-06-28 | 2007-06-27 | Mecanisme hydraulique compact a pistons radiaux |
JP2009517352A JP5268901B2 (ja) | 2006-06-28 | 2007-06-27 | ラジアルピストンを有する小型液圧式機械装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0652680 | 2006-06-28 | ||
FR0652680A FR2903153B1 (fr) | 2006-06-28 | 2006-06-28 | Mecanisme hydraulique compact a pistons radiaux |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008017766A1 true WO2008017766A1 (fr) | 2008-02-14 |
Family
ID=37762276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2007/051538 WO2008017766A1 (fr) | 2006-06-28 | 2007-06-27 | Mecanisme hydraulique compact a pistons radiaux |
Country Status (6)
Country | Link |
---|---|
US (1) | US8079298B2 (fr) |
EP (1) | EP2038547A1 (fr) |
JP (1) | JP5268901B2 (fr) |
CN (1) | CN101479469B (fr) |
FR (1) | FR2903153B1 (fr) |
WO (1) | WO2008017766A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102128158A (zh) * | 2010-01-14 | 2011-07-20 | 普罗科技有限公司 | 线状泵 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015221318A1 (de) * | 2015-10-30 | 2017-05-04 | Robert Bosch Gmbh | Hydropumpe für eine Kompaktachse, Motor-Pumpen-Einheit mit der Hydropumpe und hydraulische Steuereinheit mit der Motor-Pumpen-Einheit |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3828131A1 (de) * | 1988-08-18 | 1990-02-22 | Rexroth Mannesmann Gmbh | Radialkolbenmaschine |
FR2655090A1 (fr) * | 1989-11-30 | 1991-05-31 | Poclain Hydraulics Sa | Mecanisme a fluide sous pression, tel qu'un moteur ou une pompe, attele a un dispositif de freinage. |
WO1992010677A1 (fr) * | 1990-12-10 | 1992-06-25 | Htc A/S | Moteur ou pompe a pistons radiaux |
EP0969205A1 (fr) * | 1998-06-29 | 2000-01-05 | Poclain Hydraulics Industrie | Moteur hydraulique compact |
DE19851324C1 (de) * | 1998-11-06 | 2000-03-16 | Sauer Sundstrand Gmbh & Co | Hydraulischer Radialkolbenmotor mit Führungselementen zur axialen Führung von dessen Zylinderrollen und Werkzeug zur Montage der Führungselemente |
FR2872227A1 (fr) * | 2004-06-28 | 2005-12-30 | Poclain Hydraulics Ind Soc Par | Moteur hydraulique |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1527037A (fr) * | 1967-04-07 | 1968-05-31 | Applic Mach Motrices | Perfectionnement aux tiroirs de distribution |
FR2247109A5 (fr) * | 1973-10-08 | 1975-05-02 | Poclain Sa | |
FR2379394A1 (fr) * | 1977-02-04 | 1978-09-01 | Poclain Hydraulics Sa | Dispositif de fixation et d'entrainement d'un organe de deplacement d'un vehicule |
JPS5830779U (ja) * | 1981-08-24 | 1983-02-28 | 株式会社日本製鋼所 | マルチカム型ラジアルピストン式流体機械の作動流体分配機構 |
IN166669B (fr) * | 1985-09-20 | 1990-06-30 | Poclain Hydraulics Sa | |
JPH0776077B2 (ja) * | 1992-10-21 | 1995-08-16 | 株式会社川崎機械製作所 | ワイヤロープの巻取り巻出し駆動用油圧モータ及び駆動方法 |
FR2739418B1 (fr) * | 1995-10-02 | 1997-12-19 | Poclain Hydraulics Sa | Moteur hydraulique d'assistance |
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 |
-
2006
- 2006-06-28 FR FR0652680A patent/FR2903153B1/fr active Active
-
2007
- 2007-06-27 WO PCT/FR2007/051538 patent/WO2008017766A1/fr active Application Filing
- 2007-06-27 JP JP2009517352A patent/JP5268901B2/ja not_active Expired - Fee Related
- 2007-06-27 US US12/305,424 patent/US8079298B2/en not_active Expired - Fee Related
- 2007-06-27 EP EP07823522A patent/EP2038547A1/fr not_active Withdrawn
- 2007-06-27 CN CN200780024167XA patent/CN101479469B/zh not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3828131A1 (de) * | 1988-08-18 | 1990-02-22 | Rexroth Mannesmann Gmbh | Radialkolbenmaschine |
FR2655090A1 (fr) * | 1989-11-30 | 1991-05-31 | Poclain Hydraulics Sa | Mecanisme a fluide sous pression, tel qu'un moteur ou une pompe, attele a un dispositif de freinage. |
WO1992010677A1 (fr) * | 1990-12-10 | 1992-06-25 | Htc A/S | Moteur ou pompe a pistons radiaux |
EP0969205A1 (fr) * | 1998-06-29 | 2000-01-05 | Poclain Hydraulics Industrie | Moteur hydraulique compact |
DE19851324C1 (de) * | 1998-11-06 | 2000-03-16 | Sauer Sundstrand Gmbh & Co | Hydraulischer Radialkolbenmotor mit Führungselementen zur axialen Führung von dessen Zylinderrollen und Werkzeug zur Montage der Führungselemente |
FR2872227A1 (fr) * | 2004-06-28 | 2005-12-30 | Poclain Hydraulics Ind Soc Par | Moteur hydraulique |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102128158A (zh) * | 2010-01-14 | 2011-07-20 | 普罗科技有限公司 | 线状泵 |
Also Published As
Publication number | Publication date |
---|---|
US8079298B2 (en) | 2011-12-20 |
FR2903153A1 (fr) | 2008-01-04 |
FR2903153B1 (fr) | 2010-10-29 |
CN101479469B (zh) | 2011-11-02 |
CN101479469A (zh) | 2009-07-08 |
JP5268901B2 (ja) | 2013-08-21 |
JP2009541658A (ja) | 2009-11-26 |
US20090288551A1 (en) | 2009-11-26 |
EP2038547A1 (fr) | 2009-03-25 |
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