EP2038890A2 - Moteur à pistons axiaux comportant un disque appendice sur un disque de retenue, disque de retenue correspondant et disque appendice correspondant - Google Patents

Moteur à pistons axiaux comportant un disque appendice sur un disque de retenue, disque de retenue correspondant et disque appendice correspondant

Info

Publication number
EP2038890A2
EP2038890A2 EP07765097A EP07765097A EP2038890A2 EP 2038890 A2 EP2038890 A2 EP 2038890A2 EP 07765097 A EP07765097 A EP 07765097A EP 07765097 A EP07765097 A EP 07765097A EP 2038890 A2 EP2038890 A2 EP 2038890A2
Authority
EP
European Patent Office
Prior art keywords
disc
retaining
shoulder
retaining disc
swash plate
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Withdrawn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
EP07765097A
Other languages
German (de)
English (en)
Inventor
Rainer Stölzer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2038890A2 publication Critical patent/EP2038890A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • F04B1/126—Piston shoe retaining means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts

Definitions

  • the invention relates to an axial piston or
  • Restraining disc or shoulder disc according to the preamble of claim 1, 2 or 5.
  • such support means is formed by a retaining ring which sits in an inner groove of a swash plate in the form of a swash plate and engages behind a retaining device with a retaining disc.
  • the restraining forces and the supporting forces are absorbed by the retaining disc and transmitted via a so-called pivot caliper of the cylinder drum of the axial piston machine.
  • a removable from DE 197 51 994 Al retaining disc has arranged on a peripheral circle receiving openings for sliding shoes and a central opening, with which the retaining disc is supported on an abutment.
  • the counter-bearing may have a part-spherical bearing surface in the form of a saddle on a swiveling swash plate, on which the swash plate is pivotable.
  • the retaining force for the sliding shoes is exerted by the holding plate of the retaining disc, which faces the swash plate, against which the sliding shoes abut.
  • the at a pivotable swash plate radially elongated shaped receiving openings in the retaining disc are penetrated by cylindrical portions of the sliding shoes.
  • the receiving openings are extended by projecting from the free side ring collar. It is the purpose of these ring collars to provide a sufficiently large guide surface for the sections of the sliding blocks which protrude through them. Furthermore The ring collars contribute to the stabilization of the retention disc.
  • the retaining disc with the annular collar is preferably embossed in one piece from a stamped part, wherein the annular collar and preferably also the spherical central bearing ring are integrally stamped by pressing. Due to the increased in particular by the annular collar stability of the retaining disc, this can be formed with a relatively small thickness of the annular collar bearing disk body, resulting in a relatively low weight for the retaining disk. This is desirable in order to keep low bending moments generated during the rotational operation of the axial piston machine by the centrifugal forces of the retaining disc.
  • the invention has for its object to improve the support function in an axial piston or a retaining disc for an axial piston machine or a shoulder disc for a retaining disc or axial piston machine.
  • This improvement can be made in several aspects, e.g. B. an improvement in space utilization and the interchangeability of the retaining disc, an improvement or enabling a choice of material and a reduction of wear or prolong the life due to a suitable material.
  • All of the embodiments according to the invention have in common a shoulder disk, which rests either on the free side or free surface of the retaining disk and is fastened or fastened thereto or is designed for contact with the free side or surface of the retaining disk and a fastening thereto.
  • the approach disc be releasably or permanently attached to the retaining disc or fastened.
  • the shoulder disc is an additional component which is fixed prefabricated on the retaining disc, for.
  • the shoulder disc can also be mounted and fixed in the course of the final assembly of the axial piston machine, z. B. by latching.
  • the neck disk z. B. are exchanged for a shoulder disk of different thickness.
  • the shoulder disc in the mounted state is located between the support member and the retaining disc component that can meet various requirements.
  • the at least one support member and / or the retaining disc can be used for different designs of axial piston machines, wherein a certain total thickness for the retaining disc is predetermined
  • the retaining disc can be adapted to a desired thickness requirement by the attachment of the hub disc of a certain thickness
  • the approach disc can also meet other requirements, eg. As the wear resistance or durability or improve a damping function, especially when pushing the shoulder disc against the support member, preferably when the shoulder disc is made of an elastic or hard elastic material, for. B. plastic.
  • the contact disk according to the invention also leads to an enlargement of the support surface available for contact with the support part.
  • Support surface enlargement results in particular in the edge regions between two receiving holes in the retaining disc for the sliding shoes. In this space broadening of the shoulder disc can at least partially extend into it and thus bring about the desired support surface enlargement.
  • the support surface enlargement can also be achieved in the region between the receiving holes and the outer circumference of the retaining disc if the shoulder disc covers the outer regions of the annular collars with a tapered wall section.
  • the neck disk on their investment side z. B. have matching recesses into which the covered portions of the annular collar are added.
  • Shoulder disc also leads to a form-fitting effective positioning of the shoulder disc on at least one annular collar or between two adjacent each other in the circumferential direction ring collar, namely, in that two adjacent to each other in the circumferential direction
  • the invention is suitable for different types of axial piston machine, for.
  • the swash plate type Schrägachsenbauart or TaumelScheibenbauart.
  • the support member of the support means may optionally be attached to the housing, as shown in DE 198 00 631 Al, or on the swash plate be attached. In a swash plate design, however, the support member is to be attached to the swash plate.
  • FIG. 1 shows an axial piston according to the invention in axial section.
  • FIG. 2 shows a retaining disc with an attachment disk of the axial piston machine fastened thereto in partial section according to II-II in FIG. 1 in an enlarged view;
  • FIG. 3 shows the retaining disk according to FIG. 2 in the lower view
  • FIG. FIG. 4 shows a section corresponding to FIG. 2 through the retaining disk with a shoulder disk in a modified embodiment
  • FIG. 5 shows the retaining disk with the attachment disk according to FIG. 4 in the lower view
  • FIG. 6 the attachment disk according to FIG. 2 as an individual part
  • FIG. 7 the attachment disk according to FIG. 6 in the lower view
  • FIG. 8 the attachment disk according to FIG. 4 as an individual part
  • FIG. 9 the approach disk of FIG. 8 in the bottom view.
  • Fig. 1 shows an axial piston machine 1, which has a rotatably mounted in a housing 2 shaft 3, on which a cylinder drum 4 is arranged, wherein the cylinder drum 4 and the shaft 3 are rotatably connected to each other.
  • the shaft 3 penetrates the cylinder drum 4 and is mounted on both sides of the cylinder drum 4 in each case a rolling bearing 5 and 6, wherein an outer bearing ring 7 of the rolling bearing 6 is inserted into a corresponding recess of a housing cover 8.
  • a plurality of cylinder bores 9 are formed, wherein the center axes of the cylinder bores 9 z. B. parallel to the central axis of the shaft 3.
  • axially displaceable pistons 10 are used, which have a spherical head 11 on the side remote from the housing cover 8 side, which cooperates with a corresponding recess of a shoe 12 to a hinge connection.
  • the pistons 10 are supported on a swash plate 13.
  • the pistons 10 Upon rotation of the cylinder drum 4, the pistons 10 therefore execute a stroke movement in the cylinder bores 9.
  • the height of the stroke is determined by the position of the swash plate 13, wherein the position of the swash plate 13 in the embodiment by an adjusting device 14 is adjustable.
  • the cylinder drum 4 has a central opening 15, in which a compression spring 16 is arranged, which is stretched between a first spring bearing 17 and a second spring bearing 18.
  • the first spring bearing 17 is fixed by the shaft 3 in the axial direction
  • the second spring bearing 18, however, is formed in the illustrated embodiment by an inserted into a groove of the cylinder drum 4 Seeger ring. Due to the force of the compression spring 16, therefore, the cylinder drum 4 is moved in the axial direction so far that it sealingly bears with its end face 19 on a control plate 20, are arranged in the control openings 22 and 23, with a high-pressure or low-pressure port 26 a and 26b communicate.
  • the cylinder bores 9 are open via openings 21 to the end face 19 of the cylinder drum 4.
  • the control plate 20 is secured with a dowel pin 31 on the housing 2 against rotation.
  • Cylinder bores 9 prevailing pressure is held during a pressure stroke each of the shoe 12 with a sliding surface 25 in abutment against the swash plate 13.
  • a negative pressure arises in the cylinder bores 9, which seeks to lift the sliding blocks 12 on the relevant side half, in particular during operation of the axial piston machines 1 in an open circuit, from the swash plate 13. To prevent this is one
  • Retaining disc 24 is provided, which exerts a holding force on the sliding blocks 12 and holds them on a sliding surface 28 of the swash plate 13.
  • Housing cover 8 is axially non-displaceable.
  • the counter-bearing 29 has a spherical outer contour, which corresponds to a central passage opening 32 bounding surface and allows a change in the inclination angle of the retaining disc 24 relative to the shaft 3.
  • a shoulder surface 33 is formed on the sliding shoes 12 which is in contact with a flat retaining surface 34a on the retaining face 24a of the retaining disk 24 facing the swash plate 13.
  • the shoes 12 further include a guide portion 35 which penetrates a shoe receiving hole 36 provided in the retainer disk 24, respectively. The radial extent of the
  • Sliding shoe receiving openings 36 are each larger than the cylindrical guide section 35 of the sliding shoes 12 in this area.
  • a recess 37 is provided in the guide shoe 35 in the sliding block 12, whose geometry corresponds to the spherical head 11 of the piston 10.
  • the spherical recess 37 is closed so far around the spherical head 11 that also tensile forces between the shoe 12 and the respective piston 10 are transferable.
  • the contact surface is supplied by a lubricating oil bore in the piston 10 from the cylinder bore 9 with lubricant.
  • a retaining disk 24 is shown in axial section, in which from a disk-shaped body of thickness d guide collar 38 at the edges of the receiving openings 36 on the holding side 24a and holding surface 34a opposite free side 24b and a collar 39 of the central passage opening 32 are formed on the holding side 24a.
  • guide collar 38 from a preferably flat and the thickness d of the base disc of the retaining disc 24 defining free surface 34b, which faces away from the swash plate 13 and thus the flat support surface 34a is axially opposite.
  • the collar 39 is thereby formed so that at its the central passage opening 32 bounding inner surface 41 a spherical geometry is formed, which corresponds to the ball geometry 42, which is shown schematically and the outer contour of the thrust bearing 29 corresponds.
  • the collar 39 is formed from the main body of the retaining disc 24 so that it projects axially from the holding surface 34.
  • the length of the receiving openings 36 is increased, and it is the Retaining disc 24 stabilized.
  • the forming of the base disc designed as a base disk is preferably carried out in a single step simultaneously with the punching of the central passage opening 32 and the receiving openings 36 by a so-called embossing or pressing.
  • embossing or pressing the central through-opening 32 and the receiving openings 36 bounding edges of the body to the collar 39 and the guide collar 38 By embossing or pressing the central through-opening 32 and the receiving openings 36 bounding edges of the body to the collar 39 and the guide collar 38, a solidification of the material of the retaining disc 24 is also achieved.
  • the thickness d of the material of the base body can be reduced again without getting problems with durability during operation of the axial piston machine 1.
  • the retaining disc 24 can thus be in one piece and in one step by punching the holes 32, 36 and immediately subsequent pressing or in two steps, namely punching and pressing produce.
  • the holding surface 34a In order to make the holding surface 34a exactly flat, it can be machined after being pressed, as illustrated by a knitting point line 34c in FIGS. 2 and 4, which shows the holding surface 34a before the machining operation.
  • FIGS. 2 and 4 show a finished retaining disc 24.
  • the retaining surface 34a may be formed by stamping or by subsequent machining.
  • the embossed output surface is designated 34c.
  • the deformation height h of the guide collar 38 is preferably between 50% and 75% of the thickness d of the main body. Particularly preferably, the forming height h is chosen so that its share in the total height H is about 40%.
  • the receiving openings 36 are arranged on a pitch circle 51, which is also arranged concentrically to the outer contour 50 of the retaining disc 24. In the illustrated embodiment are nine
  • the guide collars 38 are also each surrounded by an outer surface portion 52, which is a surface portion of the flank 34b.
  • the retention disc 24 may be subject to such high lay stress by the resulting suction pull force 55 that it is biased and deflected beyond its elastic limit in the respective side half by the swash plate 13, overstressing and damaging the restraining disc 24 , A prescribed Stress within the elasticity range of the retaining disc 24, however, is harmless.
  • the axial piston machine 1 in its entirety with 58 designated support means with a support member 58a, which engages behind the retaining disc 24 in the central region of its located on the side half suction stroke with an axial play a in the outer edge region, as shown in Fig. 2 in the right half of the page.
  • the retaining plate 24 on its facing away from the swash plate 13 free side 24b an annular shoulder disk 61 which rests in the edge region of the flank 34b and one or more fasteners 62a which are part of a fastening device 62, with the shoulder disc 61 on the retaining disc 24 is permanently or releasably attached.
  • the axial thickness c of the hub disc 61 is dimensioned so large that the axial distance a is ensured to the support member 58 a.
  • the distance a is dimensioned so large that the restraining disc 24 abuts against the support member 58 a and is supported at an axial load by the resulting suction tensile force 55 before the elastic limit of the retaining disc 24 is reached.
  • the distance a thus ensures that on the one hand in the normal functional area no friction and no wear between the support member 58a and the hub disk 61 is formed and on the other hand at load peaks, the retaining disc 24 axially supported and thereby overloading beyond the elastic limit is avoided.
  • the shoulder disk 61 is a round annular disk whose radial dimension e is preferably greater than its axial thickness c.
  • the hub disc 61 extends radially from its periphery 50 a to the receiving openings 36, and it may extend between the receiving openings 36 also further radially inwardly.
  • attachment disk 61 it is possible to attach the attachment disk 61 to the retaining disk 24 in a detachable or non-detachable manner or to mount it in the course of assembly of the axial piston machine 1 and to fasten it to the retaining disk 24.
  • the fastening device 62 is preferably a locking device which allows a quick and easy to handle attachment and may be detachable or unsolvable.
  • An insoluble attachment can z. B. but also by gluing or molding the shoulder disk 61 on the retaining disc 24 done.
  • An molding can, for. Example be done by a starting disk 61 made of plastic prefabricated or molded, which can be done in a known molding device.
  • the preferably flat contact surface 61a of the shoulder disk 61 forms its fastening element.
  • the material plastic for the shoulder disk 61 is also advantageous for other reasons, because the shoulder disk 61 can be easily and inexpensively manufactured as a separate injection molded part including the at least one fastening element 62a. Due to its elasticity, however, the material plastic can also ensure a damping effect when the attachment disk 61 strikes against the support part 58a.
  • the fastening device 62 may be formed by one or more distributed on the circumference arranged locking devices.
  • a signal e.g. over the entire circumference extending latching device is provided which is formed by a projecting from the shoulder disk 61 and the contact surface 61a superior ring or peripheral wall 64 which engages over the retaining plate 24 and its base plate and with a continuous in the circumferential direction locking lug 65 or segmentally arranged locking lugs the edge of the support surface 34a elastically engages behind that the shoulder disc 24 alsklippsbar with the peripheral wall 64 on the hub disc 61 and preferably also abklippsbar.
  • the peripheral wall 64 can project beyond the holding surface 34a.
  • the radial width e is larger by the thickness of the peripheral wall 64.
  • segment-shaped latching arms 66 are provided, which is approximately 61 of the shoulder disc extend axially parallel and are dimensioned so long that they engage behind the edge of the holding surface 34a with arranged on their inner sides locking lugs 65.
  • the shoulder disc 61 can be clipped onto the retaining disc 24 and preferably also unclip, wherein the locking arms 66 rebound with the locking lugs 65 when clipping on the circumference of the retaining disc 24 and rebound again or vice versa when unscrewing.
  • the latching arms 66 may, for. B. may be formed by radial slots 67 in the peripheral wall 64, wherein the slots 67 may extend over the entire axial length or only over part of the axial length of the peripheral wall 64.
  • the attachment disk 61 projects beyond the retention disk 24 radially outwards by the thickness of the latching arms 66.
  • the shoulder disk 61 is particularly advantageous in combination with a retaining disk 24, which has on its free side 24 b projecting guide collar 38. When they are present, the surface area 52 of the free surface 34b arranged in each case outside the receiving hole 36 is reduced by the radial dimension of the associated guide collar 38. As a result, the support part 58a is only a small support surface on the retaining disc 24 to
  • the shoulder disc 61 radially inwardly open recesses 68 for the guide collar 38, wherein the recesses 68 preferably not only to the size of the guide collar 38th but are also adapted to the shape, namely rounded.
  • the shoulder disk 61 has radially widened widened disk sections 61b, which extend between adjacent guide collars 38 and, in the circumferential direction, preferably up to the guide collars 38.
  • the shoulder disk 61 has a larger radial dimension at least in the area of the disk sections 61b than in the area of the contact surface sections 52. Therefore, for supporting the shoulder disk 61 on the support part 58a in the area of the disk sections 61b, a larger support surface is available, which leads to a lower surface pressure.
  • the thickness c of the shoulder disk 61 is greater than the height h of the guide collar 38.
  • the shoulder disc 61 covers the guide collar 38 each with a wall portion 61c which forms a step-shaped axial boundary of the associated recess 68 and whose radial dimension i may be equal to or smaller than the radial dimension of the associated guide collar 38. If the radial width e of the hub disc 61 is greater than the radial distance g of the receiving openings 36 from the periphery the retaining disc 24, then recesses 69 are also formed in the wall portions 61c, which release the cross section of the receiving holes 36 axially.
  • the support member 58a may be formed by a transverse leg of a support bracket, the base leg 58b extends at a radial distance from the circumference of the retaining plate 24 and the shoulder disc 61 and its peripheral wall 64 or latching arms 66 of the swash plate 13 and attached thereto, for example screwed, is what is indicated by a dot-dash line.
  • a support device 62 is also present on the other half of the page, which is only illustrated in FIG. 2 for reasons of simplicity.
  • the invention is not limited to the illustrated and described embodiments. Instead of using the retaining disc 24 according to the invention in the axial piston machine 1 in swash plate construction, the use in axial piston machines in

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Braking Arrangements (AREA)
  • Hydraulic Motors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne un moteur à pistons axiaux (1) comportant un carter (2) dans lequel un disque oscillant (13) et un tambour à cylindres (4) sont disposés axialement l'un à côté de l'autre et de façon rotative l'un par rapport à l'autre. Le moteur comporte également plusieurs pistons (10) maintenus contre l'enlèvement par rapport au disque oscillant (13) par un disque de retenue (24) disposé entre le disque oscillant (13) et le tambour à cylindres (4), et au moins un élément d'appui (58a) saisissant par l'arrière le disque de retenue (24) dans sa partie oblique centrale de son côté libre (24b) faisant axialement face au disque oscillant (13), avec un jeu axial (a). Pour améliorer la fonction d'appui, un disque appendice (61) fixé au disque de retenue (24) s'appuie contre le côté libre (24b) du disque de retenue (24), dans la zone marginale de celui-ci.
EP07765097A 2006-07-10 2007-07-05 Moteur à pistons axiaux comportant un disque appendice sur un disque de retenue, disque de retenue correspondant et disque appendice correspondant Withdrawn EP2038890A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006031916 2006-07-10
DE102006042677A DE102006042677A1 (de) 2006-07-10 2006-09-12 Axialkolbenmaschine mit einer Ansatzscheibe an einer Rückhaltescheibe, entsprechende Rückhaltescheibe und entsprechende Ansatzscheibe
PCT/EP2007/005979 WO2008006508A2 (fr) 2006-07-10 2007-07-05 Moteur à pistons axiaux comportant un disque appendice sur un disque de retenue, disque de retenue correspondant et disque appendice correspondant

Publications (1)

Publication Number Publication Date
EP2038890A2 true EP2038890A2 (fr) 2009-03-25

Family

ID=38825381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07765097A Withdrawn EP2038890A2 (fr) 2006-07-10 2007-07-05 Moteur à pistons axiaux comportant un disque appendice sur un disque de retenue, disque de retenue correspondant et disque appendice correspondant

Country Status (5)

Country Link
EP (1) EP2038890A2 (fr)
JP (1) JP5232780B2 (fr)
CN (1) CN101443549B (fr)
DE (1) DE102006042677A1 (fr)
WO (1) WO2008006508A2 (fr)

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DE102010036199B4 (de) 2010-09-02 2021-11-18 Linde Hydraulics Gmbh & Co. Kg Axialkolbenmaschine mit verringerter Verlustleistung durch Verwendung geeigneter Dichtmittel im Bereich der Schrägscheibenausnehmung
DE102011009537A1 (de) * 2011-01-27 2012-08-02 Robert Bosch Gmbh Hydrostatische Maschine, insbesondere Axialkolbenmaschine
DE102013225899A1 (de) * 2013-12-13 2015-06-18 Robert Bosch Gmbh Schrägscheibenmaschine, Schrägscheibe und Verfahren zur hydrostatischen Entlastung einer Stellteilanbindung einer Schrägscheibenmaschine
JP6248843B2 (ja) * 2014-07-16 2017-12-20 株式会社豊田自動織機 可変容量型ピストンポンプ
US9863408B2 (en) * 2015-01-16 2018-01-09 Hamilton Sundstrand Corporation Slipper retainer for hydraulic unit
JP6210101B2 (ja) * 2015-10-22 2017-10-11 株式会社豊田自動織機 可変容量型ポンプ
JP6688724B2 (ja) * 2016-03-28 2020-04-28 株式会社神戸製鋼所 液圧回転機
CN107781326A (zh) * 2016-08-31 2018-03-09 奥的斯电梯公司 附加制动装置、制动盘组件、轮盘组件以及乘客运送装置
DE102017210857A1 (de) 2017-06-28 2019-01-03 Robert Bosch Gmbh Hydrostatische Verdrängermaschine, Kolben für die hydrostatische Verdrängermaschine, sowie Zylindertrommel für die hydrostatische Verdrängermaschine

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Also Published As

Publication number Publication date
WO2008006508A2 (fr) 2008-01-17
CN101443549B (zh) 2011-11-30
JP2009542966A (ja) 2009-12-03
JP5232780B2 (ja) 2013-07-10
DE102006042677A1 (de) 2008-01-17
WO2008006508A3 (fr) 2008-03-27
CN101443549A (zh) 2009-05-27

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