EP0943798A3 - Axial piston machine with hydrostatic relief of the cylinder bores - Google Patents
Axial piston machine with hydrostatic relief of the cylinder bores Download PDFInfo
- Publication number
- EP0943798A3 EP0943798A3 EP99105278A EP99105278A EP0943798A3 EP 0943798 A3 EP0943798 A3 EP 0943798A3 EP 99105278 A EP99105278 A EP 99105278A EP 99105278 A EP99105278 A EP 99105278A EP 0943798 A3 EP0943798 A3 EP 0943798A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder bores
- pistons
- hydrostatic relief
- axial piston
- piston machine
- 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
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
- F04B1/20—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
- F04B1/2007—Arrangements for pressing the cylinder barrel against the valve plate, e.g. by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F01B3/0041—Arrangements for pressing the cylinder barrel against the valve plate, e.g. fluid pressure
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Die Erfindung betrifft eine Axialkolbenmaschine mit einer um eine Drehachse (47) drehbar gelagerten Zylindertrommel (6), die Zylinderbohrungen (26) aufweist, in welchen Kolben (29) bewegbar geführt sind, die sich an einer Schrägscheibe (3) abstützen. Die Wandungen der Zylinderbohrungen (26) weisen Ausnehmungen zur hydrostatischen Entlastung der Gleitbewegung der Kolben (29) in den Zylinderbohrungen (26) auf. Erfindungsgemäß sind die Ausnehmungen zur hydrostatischen Entlastung als längliche Entlastungsnuten (40) mit einem spiralförmigen oder zick-zack-förmigen Verlauf ausgebildet, die sich axial in den Zylinderbohrungen (26) entlangwinden. Alternativ haben die Zylinderbohrungen (26) einen ovalen Querschnitt und die Kolben (29) einen kreisrunden Querschnitt, wobei sich zwischen der Wandung der Zylinderbohrungen (26) und den Kolben (29) Zwischenräume (70, 71) für die hydrostatische Entlastung der Gleitbewegung der Kolben (29) bilden. The invention relates to an axial piston machine having a cylinder drum (6) which is rotatably mounted about an axis of rotation (47) and which has cylinder bores (26) in which pistons (29) are movably guided, which are supported on a swash plate (3). The walls of the cylinder bores (26) have recesses for hydrostatic relief of the sliding movement of the pistons (29) in the cylinder bores (26). According to the invention, the recesses for hydrostatic relief are designed as elongated relief grooves (40) with a spiral or zigzag shape, which wind axially in the cylinder bores (26). Alternatively, the cylinder bores (26) have an oval cross section and the pistons (29) have a circular cross section, with spaces (70, 71) between the wall of the cylinder bores (26) and the pistons (29) for the hydrostatic relief of the sliding movement of the pistons (29) form.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19811312 | 1998-03-16 | ||
DE19811312 | 1998-03-16 | ||
DE19815614A DE19815614B4 (en) | 1998-03-16 | 1998-04-07 | Axial piston machine with hydrostatic relief of cylinders |
DE19815614 | 1998-04-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0943798A2 EP0943798A2 (en) | 1999-09-22 |
EP0943798A3 true EP0943798A3 (en) | 2000-06-28 |
EP0943798B1 EP0943798B1 (en) | 2004-08-18 |
Family
ID=26044643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990105278 Expired - Lifetime EP0943798B1 (en) | 1998-03-16 | 1999-03-15 | Axial piston machine with hydrostatic relief of the cylinder bores |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0943798B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021208329A1 (en) | 2021-08-02 | 2023-02-02 | Robert Bosch Gesellschaft mit beschränkter Haftung | axial piston machine |
DE102022207272A1 (en) | 2022-07-18 | 2024-01-18 | Robert Bosch Gesellschaft mit beschränkter Haftung | Axial piston machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1403754A1 (en) * | 1960-08-31 | 1969-01-23 | Mini Of Technology | Pressurized machine with reciprocating piston |
FR1595812A (en) * | 1968-11-28 | 1970-06-15 | ||
DE2534001A1 (en) * | 1975-07-30 | 1977-02-17 | Paul Hammelmann | High pressure plunger pump - has cylinder preloaded against pump pressure by shrinking into housing block |
JPH07189889A (en) * | 1993-12-27 | 1995-07-28 | Tokimec Inc | Piston type hydraulic device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4423023C2 (en) | 1994-06-30 | 1998-07-09 | Brueninghaus Hydromatik Gmbh | Axial piston machine with a cooling circuit for the cylinders and pistons |
-
1999
- 1999-03-15 EP EP19990105278 patent/EP0943798B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1403754A1 (en) * | 1960-08-31 | 1969-01-23 | Mini Of Technology | Pressurized machine with reciprocating piston |
FR1595812A (en) * | 1968-11-28 | 1970-06-15 | ||
DE2534001A1 (en) * | 1975-07-30 | 1977-02-17 | Paul Hammelmann | High pressure plunger pump - has cylinder preloaded against pump pressure by shrinking into housing block |
JPH07189889A (en) * | 1993-12-27 | 1995-07-28 | Tokimec Inc | Piston type hydraulic device |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 10 30 November 1995 (1995-11-30) * |
Also Published As
Publication number | Publication date |
---|---|
EP0943798A2 (en) | 1999-09-22 |
EP0943798B1 (en) | 2004-08-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE60014327T2 (en) | ROTATING WORK MACHINE | |
EP1028020A3 (en) | Hydrostatic transmission having two-piece pump and motor block assembly | |
EP1013928A3 (en) | Swash plate axial piston pump with pulsation damping means | |
DE1946794A1 (en) | Improved rotating fluid paddle conveyor machine | |
DE3531632A1 (en) | RADIAL PISTON MACHINE | |
DE102010015417A1 (en) | Piston for a radial piston machine | |
EP0943798A3 (en) | Axial piston machine with hydrostatic relief of the cylinder bores | |
EP1251271A3 (en) | Variable capacity axial piston machine with inclination angle sensor | |
CA2494996A1 (en) | Long-piston hydraulic machines | |
DE102005058938A1 (en) | Hydrostatic piston machine | |
DE1453437A1 (en) | Rotary radial piston machine with large piston stroke | |
DE102018205010A1 (en) | Hydrostatic axial piston machine | |
DE69405703T2 (en) | Hydraulic pressure device with swash plate | |
EP0935069A3 (en) | Hydrostatic axial piston machine with opening for medium pressure in the control plate | |
DE19652157C1 (en) | Hydraulic positive-displacement engine, especially radial piston engine | |
DE102010032649A1 (en) | Adjustable axial piston machine, has swivel bearing mounted with bearing shell, housing-sided bearing retaining part and swivel cradle-sided pivot bearing surface over swivel bearing, and bearing shell fixed at swivel cradle | |
EP1041279A3 (en) | Valve plate for axial piston machine | |
DE3904782A1 (en) | AXIAL PISTON MACHINE | |
DE19618793B4 (en) | Radial piston engine | |
EP1013927A3 (en) | Hydrostatic piston machine | |
DE102014225497A1 (en) | Hydrostatic axial piston machine | |
DE102012218902A1 (en) | Hydrostatic piston machine, particularly hydrostatic axial piston machine, has cylinder drum, in which one or multiple cylinder bores are formed, where layer of friction-reducing material is applied on walls of cylinder bores | |
DE102013205466A1 (en) | axial piston | |
DE102013210416A1 (en) | Hydrostatic axial piston machine and retaining plate | |
DE19747915C2 (en) | Axial piston machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB IT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7F 04B 1/20 A, 7F 01B 3/00 B, 7F 04B 53/16 B |
|
17P | Request for examination filed |
Effective date: 20000808 |
|
AKX | Designation fees paid |
Free format text: DE FR GB IT SE |
|
17Q | First examination report despatched |
Effective date: 20030220 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT SE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 59910234 Country of ref document: DE Date of ref document: 20040923 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20050519 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20091222 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20100325 Year of fee payment: 12 Ref country code: FR Payment date: 20100331 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20100324 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20100512 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: EUG |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20110315 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20111130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20111001 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110331 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59910234 Country of ref document: DE Effective date: 20111001 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110315 Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110315 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110316 |