EP1099055B1 - Radialkolbenmaschine mit rollenführungen - Google Patents
Radialkolbenmaschine mit rollenführungen Download PDFInfo
- Publication number
- EP1099055B1 EP1099055B1 EP99934645A EP99934645A EP1099055B1 EP 1099055 B1 EP1099055 B1 EP 1099055B1 EP 99934645 A EP99934645 A EP 99934645A EP 99934645 A EP99934645 A EP 99934645A EP 1099055 B1 EP1099055 B1 EP 1099055B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- cylinder
- axis
- machine according
- radial piston
- 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
Links
Images
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
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0439—Supporting or guiding means for the pistons
Definitions
- the invention is based on a radial piston machine whose pistons are inside Are pressurized and each one via a roller guide to the Support the end axially held roller on the cam ring and the other Features from the preamble of claim 1.
- a radial piston machine is known from EP 0 046 691 A2, in which the The length of the rollers is equal to the diameter of the cylinders that hold the pistons in the cylinder block is the one that corresponds to the cylinder for receiving the rollers has adjacent recesses. The width of the recesses is the same Diameter of the rollers.
- each wedge piece has one on the side facing the roller on the end face of the roll flat surface and on the side facing away from the roll Side a cylindrical contacting the inner surface of the cylinder Surface.
- this wedge piece is in the space between the roller, piston and Cylinder wall added without being firmly connected to any of these components to stand. Because of this freely movable arrangement in the piston direction of the wedge piece opposite the roller, the piston takes the wedge pieces during a load stroke towards the cam ring with. There is still no contact between the Wedge pieces and the cam formed on the cam ring. In the subsequent On the other hand, the idle stroke of the piston abuts the wedge pieces on those formed on the cam ring Cams and are pushed inwards.
- each of the two wedge pieces faces the one facing the roller Side on a driver-like projection, which is in a on the piston provided recess between the piston and roller towards the other Wedge piece extends.
- the wedge pieces during the idle stroke of the piston Roll taken back into the cylinder.
- the aim of the invention is to provide a radial piston machine with the features from Develop the preamble of claim 1 so that it is under warranty a reliable operation with less effort can be.
- a roller guide on its side facing away from the role Side a protrusion while the cylinder has one in the axial direction extending groove is provided which in the projection of the roller guide Direction of rotation around the axis of the cylinder.
- the roller guides are generally made of a plastic material, so that the projection on the roller guide slightly worked out of solid or, if the roller guide is produced by injection molding, can be molded on at the same time can.
- a groove in the cylinder can be made after the cylinder has been worked out be milled out. If they are advantageous from the open end of the Cylinder extends from the inside, it can also be obtained in that a small hole is first made in the cylinder block, which Working out a cylinder is cut.
- the roller guide extends according to Claim 4 the groove in the cylinder inwards to radially outside of one point, on the underside of the piston facing away from the roller in its extended position Dead center is located.
- the location of the inner end of the groove, the location of one held on the piston and the gap between it and the cylinder sealing piston seal and the stroke of the piston so matched to each other that the piston seal is not in the Area of the groove.
- the projection on the roller guide a bar running in the axial direction of the cylinder, so that for the positive connection between the projection on the roller guide and the groove of the cylinder a certain length is available.
- the bar is located on a roller guide viewed in the axial direction of the cylinder, preferably in the center of the roller guide, so that the roller guide is indifferent to the direction in which a Prevents twisting of the piston and roller and forces at its strongest Point of the roller guide can be introduced into this.
- the roller guide when mounting in two positions rotated 180 ° against each other in the space between the roller and the cylinder can be used if the projection or the bar symmetrical to one perpendicular to the axis of the cylinder level lies halfway up the roller guide.
- both roller guides of one roller are secured against rotation to the cylinder block, so divide the forces necessary for securing on two roller guides, so that the projection or the bar on the roller guides is relatively low and the Grooves in the cylinder can be relatively flat.
- the radial piston machine shown as a whole in FIGS. 1 and 2 is used mainly used as a radial piston motor and has a housing 12, the essentially consist of two housing pots 13 and 14 and one between assembles this arranged cam ring 15. The three parts mentioned are held together by screws 10 coaxially and fluid-tight.
- the inner surface the lifting ring 15 is as a lifting curve 16 with a plurality of inwardly projecting Cam 17 formed, as can be clearly seen from Figure 2.
- Within the lifting ring 15 is a cylinder block 18 which is about one with the axes the housing parts coincident axis of rotation 19 is rotatable.
- the cylinder block 18 has a central passage provided with internal teeth 20, in which an end portion 21 of an output shaft 22, with one of the internal teeth of the passage 20 corresponding external teeth is axially slidably received.
- the output shaft 22 is via a bearing arrangement 30 rotatably supported relative to the housing 12.
- the bearing arrangement includes two tapered roller bearings 31 and 32, which are housed in the housing part 13 are and can transmit high axial and radial forces.
- the second End portion 33 of the output shaft 22 protrudes out of the housing part 13 and has outside of this a shaft flange 34 for attachment to one Not shown drive element of a device to be driven, for example on a wheel of a loader.
- a multiplicity of star-shaped with respect to the axis of rotation 19 are in the cylinder block 18 radially aligned cylinders 35 which are open towards the outside of the cam ring 15 formed, the circular cylinder having the same diameter throughout with a respective perpendicular to the axis of rotation 19 of the cylinder block 18 Cylinder axis 36 can be viewed.
- Each cylinder has a bottom 35 centrally a flat recess 37 with a reduced diameter, so that an annular shoulder 38 as a contact surface for the one located in the cylinder Piston 45 is created.
- Each cylinder 35 is parallel in the cylinder block 18 to its axis of rotation 19 extending from one end of the cylinder block outgoing and on both sides of the shoulder 38 opening into the cylinder 41 assigned via the hydraulic fluid during operation of the radial piston motor is fed in and out.
- Each cylinder 35 also has two in its wall diametrically opposite in the direction of the axis of rotation 19 of the cylinder block Grooves 39, whose contour, as can be seen in particular from Figure 3, by an arc 40 is formed and its depth is about a third of the wall thickness corresponds to the cylinder block 18 in the area of the grooves.
- the two grooves 39 extend inward approximately to half the height of a cylinder 35.
- Piston 45 runs at a short distance from the inwardly facing underside 46 around an annular groove in which a piston seal 47 is received. How one recognizes from Figure 1, in which the piston 45 shown there fully extended to the outside and is at top dead center is in this position the piston, the piston seal 47 below the grooves 39, so that the working space between the bottom 46 of the piston 45 and the bottom of the cylinder 35 is always sealed against the grooves 39.
- the working spaces of the cylinders 35 are paired depending from the relative position between the cylinder block 18 and the housing part 12 alternately and offset from one another via the respective access bore 39 connected to the high pressure side of a pressure medium source or relieved of pressure.
- a piston 45 acts in the outward direction force directed towards the cam ring 15.
- the piston is supported on the cam ring 15 via a roller 48.
- This is located in a receptacle of the piston 45, in which it is covered by more than 180 °, so that it only in the direction of its axis 49 can be mounted.
- a thin bearing shell 50 is made in each receptacle clipped onto a bearing metal on which the roll rests.
- the rollers 48 are tons with two end faces perpendicular to the axis 49 51, 52 and dive when the pistons 45 when approaching a cam 16 of the Stroke curve 17 in the cylinders 35 are shifted radially inward until over half into the cylinder 35. This means that their length must be less than the diameter of a cylinder 35 and that in a wide stroke range Piston 45 a distance between the through the end faces and the cylinder surface a roll formed circular edges and the wall of the cylinder 35. Without additional measures, the rollers could move in the direction of their axis 49 move and on the return stroke of the piston against the cylinder block 18th bump. This could damage the parts and cause the engine to fail.
- roller 48 there is one in front of each of the two end faces 51 and 52 Roller 48 arranged a roller guide 53 and thereby the position of each roller 48 in the direction of its own axis with respect to a cylinder 35 and thus with respect a piston 45 and given with respect to the stroke curve 16.
- the two Roller guides 53 for each roller 48 are each in one between the end face 51 and 52 of the roller 48, the piston 45 and the cylinder wall of the cylinder 35 existing rooms arranged and identical to each other.
- a roller guide 53 In the piston stroke direction, viewed in the direction of the axis 36 of a cylinder 35, has a roller guide 53 has a substantially circular segment cross-section.
- roller 48 facing a circular cylindrical with respect to the axis 49 of a roller Pin 54, which in a corresponding central recess 55 on the front side 51 or 52 engages sucking.
- the length of the pin 54 is slightly larger than the depth of a recess 55 so that between the ring surface of a Rolien arrangement 53 around the pin 54 and the corresponding ring surface on the End face 51 or 52 of a roller 48 there is a small distance.
- roller guides 53 Over the cone 54 are in the embodiment according to Figures 4 and 5, in which the width of the cam ring in the direction of the axis of the cylinder block 18 is approximately equal to the length is the roller 48, the roller guides 53 from the roller 48 when retracting and extending the piston 45 taken.
- the roller guides 53 of the embodiment according to Figures 4 and 5, which as well as those according to the embodiment 1 to 3 in a view in the direction of the axis 49 Roller 48 has a circular outer contour with two opposing flats show, therefore have a diameter that is slightly smaller than the diameter of a roller 48.
- the diameter of the roller guides 53 according to the embodiment of Figures 1 to 3 is the same Diameter of a roller 48.
- roller guides are directed outwards from the Piston 45 and moved inwardly by the cams of the cam ring 15.
- the one Roller 48 facing away from substantially cylindrical outer surface 56 of each roller guide 53 lies against the wall of the cylinder 35.
- the roller guides 53 are therefore not rotatable with respect to the axis of rotation 49 of a roller 48.
- the relative Rotational movement between the roller and roller guides takes place on the end faces 51 and 52 of the role instead.
- a roller 48 becomes, so to speak, through the roller guides extended and adapted to the circular cylindrical cross section of a cylinder 35, so that the rollers in the entire stroke of a piston 45 in the direction of their axis can't move.
- each roller guide 53 is in the center its outer surface 56 with one in the direction of the axis 36 over the entire height a roller guide extending bar 57 provided in its cross section the cross section of the grooves 39 of the cylinder 35 is adapted and from this in Direction of rotation about the axis 36 of the cylinder 35 is positively added becomes.
- piston 45 is prevented without additional parts and rotate roller 48 about the axis 36 of the cylinder 35 and a roller Lifting curve 16 acted on the lifting ring 15 in an inclined position.
- the bar 57 leaves easy on the roller guides 53 made of a plastic material molding.
- the reference numeral 66 denotes a commutator, via which in operation of the radial piston engine over the working spaces of the cylinders 35 hydraulic fluid the access holes 41 are supplied or removed from the work rooms.
- the commutator is arranged in the housing part 14 in a fluid-tight and rotationally fixed manner. Between him and the housing part 14 are two separate annular spaces 68 and 70, which are connected to an outflow channel 71 and Drain channel 72 are connected. Of the cylinder block 18 facing Front of the commutator 66 go evenly distributed one of the number of Cam 17 of the stroke curve 16 corresponding number of axial blind bores 73, which cut the annular space 68.
- Blind holes 74 which are connected to the annular space 70.
- Hydraulic fluid is now supplied to the working area, so that the piston 45 is pushed outwards and when the roller 48 runs out of one Cam 17 a torque is generated.
Description
- Figur 1
- in der oberen Hälfte einen Längsschnitt durch das erste Ausführungsbeispiel in einer ersten Ebene und in der unteren Hälfte einen Längsschnitt durch eine zweite Ebene,
- Figur 2
- einen Schnitt entlang der Linie II-II aus Figur 1 mit Kolben und Rollenführungen in Ansicht,
- Figur 3
- einen Schnitt entlang der Linie III-III aus Figur 2,
- Figur 4
- einen Teillängsschnitt durch ein zweites Ausführungsbeispiel mit einer anderen Form der Rollenführungen und
- Figur 5
- einen Schnitt entlang der Linie V-V aus Figur 4.
Claims (11)
- Hydraulische Radialkolbenmaschine mit einem Hubring (15) und mit einem gegenüber dem Hubring (15) um eine Drehachse (19) drehbar angeordneten Zylinderblock (18) mit einer Vielzahl von in Radialrichtung des Zylinderblocks (18) ausgerichteten Zylindern (35), in denen jeweils ein verschiebbarer Kolben (45) aufgenommen ist, der sich über eine Rolle (48) am Hubring (15) abstützt, wobei die Rolle (48) am Kolben (45) um eine zur Drehachse (19) des Zylinderblocks (18) parallele Drehachse (49) drehbar gelagert angeordnet ist und jeder Rolle (48) individuell zwei Rollenführungen (53) zugeordnet sind, die sich vor den Stirnseiten (51, 52) der Rolle (48) befinden, die bezüglich der Achse (36) des Zylinders (35) relativ zum Zylinderblock (18) verdrehgesichert sind, und durch die die Rolle (48) in Richtung ihrer Drehachse (49) axial im Zylinder (35) gehalten ist,
dadurch gekennzeichnet, daß zumindest eine der beiden Rollenführungen (53) einer Rolle (48) unmittelbar ohne ein zusätzliches Teil zum Zylinderblock (18) verdrehgesichert ist. - Hydraulische Radialkolbenmaschine nach Patentanspruch 1, dadurch gekennzeichnet, daß eine Rollenführung (53) auf ihrer der Rolle (48) abgewandten Seite (56) einen Vorsprung (57) aufweist und daß der Zylinder (35) mit einer in Richtung seiner Achse (36) verlaufenden Nut (39) versehen ist, die den Vorsprung (57) der Rollenführung (53) in Drehrichtung um die Achse (36) des Zylinders (35) formschlüssig aufnimmt.
- Hydraulische Radialkolbenmaschine nach Patentanspruch 2, dadurch gekennzeichnet, daß sich die Nut (39) vom offenen Ende des Zylinders (35) aus nach innen erstreckt.
- Hydraulische Radialkolbenmaschine nach Patentanspruch 2 oder 3, dadurch gekennzeichnet, daß sich die Nut (39) im Zylinder (35) nach innen bis radial außerhalb einer Stelle erstreckt, an der sich die der Rolle (48) abgewandte Unterseite (46) des Kolbens (45) in dessen ausgefahrenem Totpunkt befindet.
- Hydraulische Radialkolbenmaschine nach Patentanspruch 4, dadurch gekennzeichnet, daß die Nut (39) radial außerhalb des Hubweges einer am Kolben (45) gehaltenen und den Spalt zwischen diesem und dem Zylinder (35) abdichtenden Kolbendichtung (47) endet.
- Hydraulische Radialkolbenmaschine nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der Vorsprung (57) an der Rollenführung (53) eine in Achsrichtung des Zylinders (35) verlaufende Leiste ist.
- Hydraulische Radialkolbenmaschine nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß sich der Vorsprung bzw. die Leiste (57) an einer Rollenführung (53), in Achsrichtung des Zylinders (35) betrachtet, mittig der Rollenführung (53) befindet.
- Hydraulische Radialkolbenmaschine nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß die Kontur einer Nut (39) des Zylinders (35), in Achsrichtung des Zylinders (35) betrachtet, durch einen Kreisbogen (40) gebildet wird.
- Hydraulische Radialkolbenmaschine nach einem vorhergehenden Patentanspruch, dadurch gekennzeichnet, daß beide Rollenführungen (53) einer Rolle (48) unmittelbar ohne ein zusätzliches Teil zum Zylinderblock (18) verdrehgesichert sind.
- Hydraulische Radialkolbenmaschine nach einem vorhergehenden Patentanspruch, dadurch gekennzeichnet, daß die Rollenführungen (53) an der der Stirnseite (51, 52) der Rolle (48) zugewandten Seite einen Vorsprung (54) aufweisen, der in eine an der Stirnseite (51, 52) der Rolle (48) ausgebildete Ausnehmung (55) eingreift.
- Hydraulische Radialkolbenmaschine nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Rollenführungen (53) nach außen durch den Kolben (45) und nach innen durch den Hubring (15) verschiebbar sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19832696A DE19832696A1 (de) | 1998-07-21 | 1998-07-21 | Radialkolbenmaschine mit Rollenführungen |
DE19832696 | 1998-07-21 | ||
PCT/EP1999/004835 WO2000005502A1 (de) | 1998-07-21 | 1999-07-09 | Radialkolbenmaschine mit rollenführungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1099055A1 EP1099055A1 (de) | 2001-05-16 |
EP1099055B1 true EP1099055B1 (de) | 2003-06-25 |
Family
ID=7874761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99934645A Expired - Lifetime EP1099055B1 (de) | 1998-07-21 | 1999-07-09 | Radialkolbenmaschine mit rollenführungen |
Country Status (5)
Country | Link |
---|---|
US (1) | US6443047B1 (de) |
EP (1) | EP1099055B1 (de) |
JP (1) | JP2002521606A (de) |
DE (2) | DE19832696A1 (de) |
WO (1) | WO2000005502A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106795870A (zh) * | 2014-10-03 | 2017-05-31 | 波克兰液压工业设备公司 | 设有引导活塞平移运动的装置的液压机构 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE517873C2 (sv) * | 1997-04-10 | 2002-07-30 | Haegglunds Drives Ab | Kolv till en hydraulisk radialkolvmotor samt hydraulisk radialmotor med sådan kolv |
DE102008006123A1 (de) | 2008-01-25 | 2009-07-30 | Robert Bosch Gmbh | Radialkolbenmaschine |
DE102011083571A1 (de) * | 2011-09-28 | 2013-03-28 | Robert Bosch Gmbh | Stößelbaugruppe für eine Kraftstoffhochdruckpumpe sowie Kraftstoffhochdruckpumpe |
EP2739846B1 (de) * | 2012-06-29 | 2015-08-05 | Mitsubishi Heavy Industries, Ltd. | Flüssigkeitsarbeitsmaschine und windturbinengenerator |
DE102012212579B4 (de) * | 2012-07-18 | 2018-11-22 | Continental Automotive Gmbh | Rollenstößelanordnung für eine Radialkolbenpumpe mit zwei Sicherungselementen für die Laufrolle des Rollenstößels |
FR3024503B1 (fr) * | 2014-07-31 | 2019-06-21 | Poclain Hydraulics Industrie | Dispositif de carter de distribution pour une machine hydraulique |
FR3030645B1 (fr) * | 2014-12-17 | 2019-10-11 | Poclain Hydraulics Industrie | Appareil hydraulique a pistons radiaux |
FI130485B (en) * | 2021-08-12 | 2023-09-29 | Black Bruin Oy | RADIAL PISTON HYDRAULIC MOTOR WITH A HOLLOW ROTATING SHAFT WITHIN THE MOTOR |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2086991A (en) | 1980-08-26 | 1982-05-19 | Staffa Products Ltd | Improvements in and relating to hydraulic motors |
SE456517B (sv) * | 1982-09-08 | 1988-10-10 | Hegglund & Soner Ab | Hydraulisk radialkolvmotor |
FR2582058B1 (fr) * | 1985-05-15 | 1989-06-30 | Poclain Hydraulics Sa | Mecanisme hydraulique, moteur ou pompe, muni de rouleaux montes sur les pistons et de moyens de maintien en position desdits rouleaux |
DE3530979A1 (de) * | 1985-08-30 | 1987-03-12 | Rexroth Mannesmann Gmbh | Radialkolbenmaschine |
FR2588616B1 (fr) * | 1985-10-16 | 1988-01-08 | Poclain Hydraulics Sa | Mecanisme, moteur a pompe, a au moins deux cylindrees actives distinctes. |
DE3828131A1 (de) * | 1988-08-18 | 1990-02-22 | Rexroth Mannesmann Gmbh | Radialkolbenmaschine |
DE3926354A1 (de) * | 1989-08-09 | 1991-02-14 | Rexroth Mannesmann Gmbh | Spuelventil |
FR2651836B1 (fr) * | 1989-09-14 | 1994-06-10 | Poclain Hydraulics Sa | Mecanisme, moteur ou pompe, a pistons supportant des rouleaux d'appui desdits pistons sur une came. |
DE4004932C2 (de) * | 1990-02-16 | 1995-04-13 | Rexroth Mannesmann Gmbh | Radialkolbenmaschine |
DK292690D0 (da) * | 1990-12-10 | 1990-12-10 | Htc As | Motor- eller pumpeaggregat |
FR2727471A1 (fr) * | 1994-11-30 | 1996-05-31 | Poclain Hydraulics Sa | Mecanisme, moteur ou pompe, a pistons munis de rouleaux d'appui sur une came |
-
1998
- 1998-07-21 DE DE19832696A patent/DE19832696A1/de not_active Withdrawn
-
1999
- 1999-07-09 US US09/744,178 patent/US6443047B1/en not_active Expired - Fee Related
- 1999-07-09 WO PCT/EP1999/004835 patent/WO2000005502A1/de active IP Right Grant
- 1999-07-09 EP EP99934645A patent/EP1099055B1/de not_active Expired - Lifetime
- 1999-07-09 JP JP2000561433A patent/JP2002521606A/ja active Pending
- 1999-07-09 DE DE59906111T patent/DE59906111D1/de not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106795870A (zh) * | 2014-10-03 | 2017-05-31 | 波克兰液压工业设备公司 | 设有引导活塞平移运动的装置的液压机构 |
CN106795870B (zh) * | 2014-10-03 | 2019-04-02 | 波克兰液压工业设备公司 | 设有引导活塞平移运动的装置的液压机构 |
Also Published As
Publication number | Publication date |
---|---|
DE19832696A1 (de) | 2000-01-27 |
JP2002521606A (ja) | 2002-07-16 |
WO2000005502A1 (de) | 2000-02-03 |
DE59906111D1 (de) | 2003-07-31 |
US6443047B1 (en) | 2002-09-03 |
EP1099055A1 (de) | 2001-05-16 |
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