EP1156212A2 - Kolbenmaschine mit in Führungsbuchsen einer Zylindertrommel verschiebbar gelagerten Kolben - Google Patents
Kolbenmaschine mit in Führungsbuchsen einer Zylindertrommel verschiebbar gelagerten Kolben Download PDFInfo
- Publication number
- EP1156212A2 EP1156212A2 EP01102330A EP01102330A EP1156212A2 EP 1156212 A2 EP1156212 A2 EP 1156212A2 EP 01102330 A EP01102330 A EP 01102330A EP 01102330 A EP01102330 A EP 01102330A EP 1156212 A2 EP1156212 A2 EP 1156212A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide
- piston machine
- cross
- sectional widening
- cylinder drum
- 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
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
- F04B1/12—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
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/166—Cylinder liners
Definitions
- the invention relates to a piston machine and a guide bush for such a piston machine after 8.
- a piston machine of this type it can e.g. B. um an axial piston machine or a radial piston machine act.
- a piston machine of this type is in Form of a swash plate axial piston machine described.
- the length is Guide bushes, the inner surface of which with a low-friction material are coated, only as long dimensioned that the front face of the piston in the return stroke positions slightly before the front Ends of the liners.
- the invention has for its object a Piston machine or a guide bushing of the beginning Specify specified species so that the risk of a axial displacement of the guide bush in functional operation is reduced.
- the working pressure acts in the functional mode associated working chambers with radially outward directed Compressive forces against the inner wall of the Cross-sectional expansion, the compressive forces the Cross section widening longitudinal section of the Spread the guide bushing and against the inner wall of the press the corresponding socket hole.
- This makes a radial effective clamping force between the tapered longitudinal section the guide bush and the inner wall of the bush hole generates the seat of the guide bush in the bush hole consolidates or stabilizes. This takes place in functional mode automatically by the working pressure in the associated Working chambers.
- the Design according to the invention thus leads to none Increasing the friction between the piston and the Guide bushing and not too additional from the Friction resulting axial forces.
- the configurations according to the invention are not only because of the attainable stabilization of the seat of the Guide bushing in the bushing hole advantageous. It is too take into account that by the invention Design achievable stabilization of the seat only in Functional operation takes place, d. H. at a standstill Piston machine enters the seat stabilizing Clamping effect does not open. As a result, the liner is seated with the piston machine at a standstill less press fit in the socket hole, and it can be therefore with less axial forces from the bush hole pull out, e.g. B. for replacement of the liner a repair. In addition, the invention Guide bushing lighter due to the lower press fit press into the bushing hole.
- the liner can be rounded radially, conically or concavely be trained.
- the through the inventive design in Functional achievable clamping force is the greater, depending longer the one with the cross-sectional expansion Longitudinal section of the guide bush is. That is, it is advantageous, the tapered longitudinal section of the Train and arrange guide bushing so that it up to Pre-stroke end position of the piston is sufficient or above extends beyond.
- the exemplary and designated in its entirety with 1 Piston machine has a housing 2, in the interior thereof 3 a swash plate 4 and a cylinder drum 5 are arranged side by side.
- the cylinder drum 5 are Distributed on the circumference bushing holes 6, which are in the present embodiment, one Axial piston machine essentially parallel to one Extend central axis 7 of the cylinder drum 5 and on the the swash plate 4 facing end face 5a Cylinder drum 5 are open.
- the socket holes 6 are Guide bushes 8 firmly inserted, preferably pressed in, between their preferably cylindrical outer surface 8a and inner lateral surfaces 6a of the bushing holes 6 certain excess exists, creating an interference fit is guaranteed.
- the guide bushings 8 can on the Face 5a of the cylinder drum facing the swash plate 5 ends.
- cylindrical piston 9 substantially axially displaceable stored with their piston heads 9a working chambers 11 in the cylinder drum 5 in the direction of the swash plate 4 limit.
- the foot ends 9b facing the swash plate 4 the piston 9 are each by a hinge 12 on the Swashplate 4 supported, with sliding shoes 13 present can be between those and the foot ends 9b preferably as ball joints with a ball head and one Ball recess trained joints 12 are arranged.
- the cylinder drum 5 lies with its swash plate 4 face 5b facing away from a control disk 14, in of the two control openings 15 in the form of through holes are arranged, the sections of an indicated Form feed line 16 and a discharge line 17, which extend through an adjacent housing wall 18, on which the control disc 14 is held.
- the Cylinder drum 5 is mounted on a drive shaft 19 which is rotatably mounted in the housing 2 and the axis of rotation 21 thereof runs coaxial to the central axis 7.
- the housing 2 is made of a cup-shaped housing part 2a with a housing base 2b and a peripheral wall 2c and a housing wall 18 forming lid 2d formed on the free edge of the Circumferential wall 2c abuts and thus by hint shown screws 22 is screwed.
- the further supply and discharge lines 16, 17, line connections 16a, 17a are provided on the cover 2d.
- the drive shaft 19, which the cylinder drum 5 in one Bearing hole 23 penetrates is in the bearing recesses Housing bottom 2b and the lid 2d by means of suitable Bearings 25, 26, in particular roller bearings, rotatably mounted and sealed, axially penetrating the housing base 2b and protrudes from the housing base 2b with a drive pin 19a.
- the cylinder drum 5 is through a rotary driving connection 26, e.g. B. a tooth coupling, non-rotatably arranged on the drive shaft 19, which is the firmly arranged on the housing base 2 or formed therein Swash plate 4 penetrated in a through hole 27.
- a rotary driving connection 26 e.g. B. a tooth coupling, non-rotatably arranged on the drive shaft 19, which is the firmly arranged on the housing base 2 or formed therein Swash plate 4 penetrated in a through hole 27.
- the present exemplary embodiment rotates in functional operation the cylinder drum 5 relative to the swash plate 4, the Piston 9 longitudinally in the direction of the working chambers 11 and be moved back.
- the guide bushings 8 in their facing away from the openings 6b of the socket holes 6 End areas a an end tapering Cross-sectional widening 32 of its inner lateral surface 8b, whereby the thickness d of the guide bushings 8 in the area of Cross-sectional expansion 32 is reduced.
- the Cross-sectional extension 32 is preferred with it hollow cylindrical inner surface 32a in the direction of associated opening 6b delimited by a step surface 32b, which is preferably conical or radial, but also can be rounded concavely to the existing fillet stabilize.
- the radially outward spreading forces 33 act in the adjacent end region of the working chambers respective guide bushing 8 effective and radially inward contraction forces 35 opposed, however the latter smaller, in particular with increasing distance of the head end 8c facing away from the opening 6b Guide bushing 8. These contraction forces 35 are caused by the unavoidable pressure effect of the hydraulic Medium in the joint between the guide bushing 8 and Inner surface area 6a generated.
- the Spreading forces 33 also radially by additional externally directed expansion forces 36 supported by the in the joint between the piston 9 and guide bush 8 existing pressure are generated, and also with greater distance from the head end 8c are smaller.
- the step surface 32b is preferably one Position arranged that in the return stroke position Head ends 9a of the piston 9 are in the area of the step surface 32b are located or protrude above them.
- the axial length of the extended end region a is larger than that of 4, in the same or comparable parts with the same reference numerals are.
- the extended end region a can be of the same size or larger be than about the inside or outside cross-sectional dimension of the Guide bushing 8, wherein it extends approximately into the Pre-stroke end position of the piston 9 or beyond until the end facing away from the opening 6b or in the vicinity of the Socket hole 6 can extend. With increasing length of the Cross-sectional expansion 32 or the tapered end region a is the radial spreading force to secure the Guide bushing 8 enlarged in bushing hole 6.
- the length of the Cross-sectional expansion 32 to be only a few mm.
- Your Length can e.g. B. approximately the thickness d of the guide bushing 8 correspond.
- the axial length c can be a few mm. This will result in functional operation in this area Edge pressures occurring between the piston 9 and the Guide bushing 8 reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
- Fig. 1
- eine erfindungsgemäße Kolbenmaschine in Form einer Schrägscheiben-Axiakolbenmaschine im axialen Schnitt;
- Fig. 2
- eine Zylindertrommel der Axialkolbenmaschine im axialen Schnitt;
- Fig. 3
- eine Führungsbuchsen-Ausgestaltung und -Anordnung im axialen vergrößerten Schnitt in abgewandelter Ausgestaltung;
- Fig. 4
- eine Führungsbuchsen-Ausgestaltung und -Anordnung im axialen Schnitt in weiter abgewandelter Ausgestaltung;
- Fig. 5
- eine Führungsbuchse in weiter abgewandelter Ausgestaltung im axialen Schnitt.
Claims (13)
- Kolbenmaschine (1), insbesondere Axialkolbenmaschine, mit einer Zylindertrommel (5), in der mehrere auf einem Umfang verteilt angeordnete Kolben (9) in Führungsbuchsen (8) verschiebbar geführt sind, wobei die Führungsbuchsen (8) mit ihren Kopfenden (8c) in Buchsenlöchern (6) in der Zylindertrommel (5) eingesetzt und befestigt sind, und wobei die Kolben (9) mit ihren Kopfenden (9a) Arbeitskammern (11) in der Zylindertrommel (5) begrenzen und mit ihren Fußenden (9b) an einem Triebteil der Kolbenmaschine (1) abgestützt sind,
dadurch gekennzeichnet, daß die Innenmantelflächen (8b) der Führungsbuchsen (8) in den Endbereichen (a) ihrer Kopfenden (8c) jeweils eine Querschnittserweiterung (32) aufweisen. - Kolbenmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß die Querschnittserweiterung (32) am betreffenden Kopfende (8c) der Führungsbuchse (8) axial ausmündet. - Kolbenmaschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Querschnitterweiterung (32) durch eine Stufenfläche (32b) axial begrenzt ist, die radial oder konisch oder konkav gerundet ausgebildet ist. - Kolbenmaschine nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Innenmantelfläche (32a) der Querschnittserweiterung (32) eine hohlzylindrische Fläche ist. - Kolbenmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß die axiale Länge (a) des Endbereichs wenigstens in etwa der Dicke (d) der Führungsbuchse (8) entspricht. - Kolbenmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß in der Rückhubendstellung der Kolben (9) deren Kopfende (9a) sich jeweils im Bereich des rückwärtigen Endes der Querschnittserweiterung (32) befindet oder dieses rückwärtige Ende überragt. - Kolbenmaschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, daß in der Außenmantelfläche (8a) der Führungsbuchsen (8) jeweils in einem Abstand (b) vom Kopfende (8c) eine Ringnut (37) angeordnet ist. - Führungsbuchse (8) für eine Kolbenmaschine (1), insbesondere Axialkolbenmaschine, mit einer Zylindertrommel (5), in der zumindest ein Kolben (9) in der Führungsbuchse (8) verschiebbar geführt ist, wobei die Führungsbuchse (8) mit ihrem Kopfende (8c) in Buchsenlöchern (6) in der Zylindertrommel (5) eingesetzt und befestigt ist und wobei der Kolben (9) mit seinem Kopfende (9a) Arbeitskammern (11) in der Zylindertrommel (5) begrenzt und mit seinem Fußende (9b) an einem Triebteil der Kolbenmaschine (1) abgestützt ist,
dadurch gekennzeichnet, daß die Innenmantelfläche (8b) der Führungsbuchse (8) in ihrem ihr Kopfende (8c) bildenden Endbereich (a) eine Querschnittserweiterung (32) aufweist. - Führungsbuchse nach Anspruch 8,
dadurch gekennzeichnet, daß die Querschnittserweiterung (32) am Kopfende (8c) der Führungsbuchse (8) axial ausmündet. - Führungsbuchse nach Anspruch 8 oder 9,
dadurch gekennzeichnet, daß die Querschnittserweiterung (32) an ihrem dem Kopfende (8c) abgewandten Ende durch eine Stufenfläche (32b) begrenzt ist, die radial oder konisch oder konkav gerundet ausgebildet ist. - Führungsbuchse nach einem der vorherigen Ansprüche 8 bis 10,
dadurch gekennzeichnet, daß die Innenmantelfläche (32a) der Querschnittserweiterung (32) eine hohlzylindrische Fläche ist. - Führungsbuchse nach einem der Anprüche 8 bis 11,
dadurch gekennzeichnet, daß die axiale Länge (a) der Querschnittserweiterung (32) wenigstens etwa der Dicke (d) der Führungsbuchse (8), vorzugsweise etwa der Querschnittsabmessung der Führungsbuchse (8) entspricht. - Führungsbuchse nach einem der Ansprüche 8 bis 12,
dadurch gekennzeichnet, daß in der Außenmantelfläche (8a) der Führungsbuchsen (8) jeweils in einem Abstand (b) vom Kopfende (8c) eine Ringnut (37) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10023849 | 2000-05-16 | ||
DE2000123849 DE10023849B4 (de) | 2000-05-16 | 2000-05-16 | Kolbenmaschine mit in Führungsbuchsen einer Zylindertrommel verschiebbar gelagerten Kolben und Führungsbuchse für eine solche Kolbenmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1156212A2 true EP1156212A2 (de) | 2001-11-21 |
EP1156212A3 EP1156212A3 (de) | 2003-06-11 |
EP1156212B1 EP1156212B1 (de) | 2010-04-28 |
Family
ID=7642179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010102330 Expired - Lifetime EP1156212B1 (de) | 2000-05-16 | 2001-02-01 | Axialkolbenmaschine mit in Führungsbuchsen einer Zylindertrommel verschiebbar gelagerten Kolben |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1156212B1 (de) |
DE (2) | DE10023849B4 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003025347A1 (de) * | 2001-09-19 | 2003-03-27 | Brueninghaus Hydromatik Gmbh | Hydrostatische maschine mit kompensierten laufbuchsen |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10220611A1 (de) * | 2002-02-15 | 2003-08-28 | Brueninghaus Hydromatik Gmbh | Drehgleitlager |
WO2013037611A1 (de) | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Kolbenführungsbuchse für eine axialkolbenmaschine und axialkolbenmaschine mit einer kolbenführungsbuchse |
DE102014217143A1 (de) | 2014-08-28 | 2016-03-03 | Robert Bosch Gmbh | Zylindertrommel für eine hydrostatische Axialkolbeneinheit |
DE102018205010A1 (de) * | 2018-04-04 | 2019-10-10 | Robert Bosch Gmbh | Hydrostatische Axialkolbenmaschine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2521182A1 (de) | 1975-05-13 | 1976-11-25 | Kloeckner Werke Ag | Schraegscheiben-axialkolbenmaschine |
DE2812418A1 (de) | 1978-03-22 | 1979-10-04 | Linde Ag | Zylindertrommel fuer eine hydrostatische kolbenmaschine und verfahren zu deren herstellung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4029295A1 (de) * | 1990-09-16 | 1992-03-19 | Karl Eickmann | Dichtung fuer hohe drucke |
DE4301126C2 (de) * | 1993-01-18 | 1995-05-24 | Danfoss As | Verfahren zum Montieren einer Laufbuchse in einem Grundkörper einer hydraulischen Maschine und hydraulische Maschine |
GB9325388D0 (en) * | 1993-12-11 | 1994-02-16 | T M Kennedy & Co Ltd | Apparatus for reciprocating pumps |
JPH07180652A (ja) * | 1993-12-24 | 1995-07-18 | Tokimec Inc | ピストン型液圧装置 |
DE4407978C2 (de) * | 1994-03-10 | 2002-11-07 | Continental Teves Ag & Co Ohg | Kolbenpumpe |
DE19521259C2 (de) * | 1995-06-10 | 1998-11-05 | Danfoss As | Hydraulische Kolbenmaschine |
DE19747850A1 (de) * | 1997-07-30 | 1999-02-04 | Bosch Gmbh Robert | Kolbenpumpe |
-
2000
- 2000-05-16 DE DE2000123849 patent/DE10023849B4/de not_active Expired - Fee Related
-
2001
- 2001-02-01 DE DE50115453T patent/DE50115453D1/de not_active Expired - Lifetime
- 2001-02-01 EP EP20010102330 patent/EP1156212B1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2521182A1 (de) | 1975-05-13 | 1976-11-25 | Kloeckner Werke Ag | Schraegscheiben-axialkolbenmaschine |
DE2812418A1 (de) | 1978-03-22 | 1979-10-04 | Linde Ag | Zylindertrommel fuer eine hydrostatische kolbenmaschine und verfahren zu deren herstellung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003025347A1 (de) * | 2001-09-19 | 2003-03-27 | Brueninghaus Hydromatik Gmbh | Hydrostatische maschine mit kompensierten laufbuchsen |
US7073427B2 (en) | 2001-09-19 | 2006-07-11 | Brueninghaus Hydromatik Gmbh | Hydrostatic machine with compensated sleeves |
Also Published As
Publication number | Publication date |
---|---|
DE50115453D1 (de) | 2010-06-10 |
EP1156212A3 (de) | 2003-06-11 |
DE10023849B4 (de) | 2005-11-17 |
EP1156212B1 (de) | 2010-04-28 |
DE10023849A1 (de) | 2001-11-29 |
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