EP1058771A1 - Axialkolbenmaschine - Google Patents
AxialkolbenmaschineInfo
- Publication number
- EP1058771A1 EP1058771A1 EP99903848A EP99903848A EP1058771A1 EP 1058771 A1 EP1058771 A1 EP 1058771A1 EP 99903848 A EP99903848 A EP 99903848A EP 99903848 A EP99903848 A EP 99903848A EP 1058771 A1 EP1058771 A1 EP 1058771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine according
- axial piston
- piston machine
- actuating
- face
- 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- Withdrawn
Links
Classifications
-
- 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
- F01B3/10—Control of working-fluid admission or discharge peculiar thereto
-
- 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
- F01B3/10—Control of working-fluid admission or discharge peculiar thereto
- F01B3/103—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
- F01B3/106—Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block by changing the inclination of the swash plate
-
- 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
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
- F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
Definitions
- the invention relates to an axial piston machine according to the preamble of claim 1.
- an actuating cylinder / actuating piston unit which can be acted upon by control pressure is provided, the displaceable part of which is connected to the actuator of the axial piston machine.
- the actuating cylinder / actuating piston unit is designed in a ring shape and arranged around the cylinder drum.
- the actuating cylinder consists of an annular space in which a bushing that is spring-loaded on one side and can be loaded on one side with pressure medium can be adjusted and works together with a cradle with a swashplate.
- the axial piston machine does not necessarily and not always work in its optimal working range and thus does not achieve the optimum efficiency.
- the object of the invention is to remedy this.
- the invention is implemented in any case if it is an axial piston machine, the efficiency of which is optimized with a control device in that the inclination of the swash plate is adjusted to the instantaneous power of the drive device. This setting is preferably made automatically.
- Axial piston machines according to the preamble of claim 1 are also known from DE-A1-31 35 605, DE-OS 1 947 641 and DE-C2-33 46 000.
- the main problem identified in the present invention is not recognized in these documents, and no measures are proposed with which this problem could be solved.
- the adjusting device of DE-A1-31 35 605 has at least one actuating cylinder with actuating piston which can be acted upon by control pressure and cooperates with the swash plate, the actuating piston cooperating with at least one spring body acting in the actuating cylinder axis direction, the actuating piston being designed as an open hollow cylinder, the closed end face of which is in pressure connection with the spring body, and furthermore the actuating piston carries an auxiliary piston provided with a spring plate and the spring body is arranged between the end face and the spring plate, which strives to push the spring plate away from the end face.
- the spring plate is arranged in one operating position outside the actuating piston and in its other operating position coincides with the open end face of the actuating piston.
- DE-OS 1 947 641 it is known from DE-OS 1 947 641 that at least one spring body is compressed in the effective position of the swash plate and that the spring body is designed as a helical spring.
- the adjusting device has at least one actuating cylinder with actuating piston which can be acted upon by control pressure and cooperates with the swash plate and which preferably cooperates with at least one spring body acting in the axial direction of the actuating cylinder.
- the actuating piston is designed as an inwardly open hollow cylinder, the closed end face of which is in pressure connection with the spring body.
- the control piston can be a Bear coaxial and inwardly directed rod with an adjustable on the rod hollow cylindrical sliding sleeve, at the free end of a flange is arranged, between the end face and the flange of the spring body is arranged, which strives to push the flange away from the end face. In this way, an actuating cylinder / actuating piston unit with maximum stroke movements and minimal dimensions is obtained.
- the sliding sleeve is open on both sides and carries the spring body. It can be provided that the free end of the rod with a circular cross section carries a larger diameter collar, that the other free end of the sliding sleeve ends in a ring with a reduced inner diameter and that the spring body is arranged between the flange and the end face. The diameter of the rod corresponds approximately to the inner diameter of the ring.
- the collar is circular in cross section, has an outer diameter which corresponds approximately to the inner diameter of the sliding sleeve, and that the free end face of the collar lies in the plane of the open end of the hollow cylinder.
- the spring bodies are arranged within the actuating piston in the retracted actuating piston, while the spring bodies can be arranged at a distance from the end face of the actuating cylinder in the maximally extended position of the actuating piston.
- the flange is arranged in its one operating position outside the actuating piston, while in its other operating position it comes close to the open end of the actuating piston.
- a particularly expedient embodiment of the invention provides that at least two, preferably three, four, five or more actuating cylinders are provided, which are arranged approximately symmetrically with respect to the axis of rotation of the drive device.
- the spring body consists of one or more helical compression springs which have different characteristic curves.
- Fig. 2 is a cradle in axial plan view
- Fig. 3 shows the part labeled III according to Fig. 1 enlarged.
- FIG. 1 shows part of an axial piston machine, the pistons of which have 8 ball heads, onto each of which a sliding shoe 6 is pressed, which slides on the swash plate / swash plate 12 with an adjustable swivel angle.
- the high surface pressure and the high sliding speed require a particularly well-developed lubrication on the slide shoes 6.
- lubricating pressure oil is removed from the pressure chamber via nozzles and the hollow drilled pistons.
- the sliding block 6 is designed such that the lubricating pressure also reduces the force with which the piston 8 is pressed onto the swash plate 12.
- Each piston 8 describes a suction stroke and a pressure stroke due to the inclination of the piston track.
- the cylinder drum 16 with the piston 8 is set in rotation by the drive shaft 14 firmly connected to it.
- the sliding shoes 6 are also held on the swash plate 12 in the suction stroke, so that they count as self-sucking.
- the axial piston machine is provided with a drive device 14 and an adjusting device 10, which in the present case consists of four actuating cylinder / actuating piston units, for the swash plate 12.
- a control device for matching the characteristic of the drive device 14 to the characteristic of the adjusting device 10 is provided, which essentially consists of the four adjusting devices with adjustable working pressure.
- the control device produces an optimal coordination between the performance diagram (characteristic curve) of the drive device and the performance diagram (characteristic curve) of the control device.
- the adjusting device 10 comprises four actuating cylinders 24 with actuating pistons 26 which can be acted upon by control pressure and cooperate with the swash plate 12.
- the actuating cylinders 24 work together with one or more spring bodies 28, 29 acting in the axial direction of the actuating cylinders 24, with at least one in the effective position of the swash plate 12 Spring body 28 is compressed.
- the actuating piston 26 is designed as an inwardly open hollow cylinder, the closed end face 30 of which is in pressure connection with the spring body 28, 29.
- the end of the actuating piston 26, which is designed as a tappet 9 (FIG. 3), is supported on a cradle 18 which has rollers 7 for this purpose in order to minimize the friction that occurs.
- the respective actuating piston 26 carries a coaxial and inwardly directed rod 32 with a hollow cylindrical sliding sleeve 34 which is adjustable on the rod 32 and at the free end of which a flange 36 is arranged.
- the spring body is between the end face and the flange 36 28 or 29 arranged, which strives to push the flange 36 away from the end face 30.
- the sliding sleeve 34 is open on both sides.
- the free end of the rod 32 which is circular in cross section, carries a collar 38 with a larger diameter.
- the other free end 40 of the sliding sleeve 34 ends in a ring 42 with a reduced inside diameter.
- the spring body 28 or 29 is arranged between the flange 36 and the end face 30.
- the diameter of the rod 32 corresponds approximately to the inner diameter of the ring 42.
- the collar 38 is circular in cross section and has an outer diameter which corresponds approximately to the inner diameter of the sliding sleeve 34.
- the free end face of the collar 38 is in the vicinity of the open end of the actuating piston 26.
- the flange 36 is arranged in its one operating position (FIG. 3) outside the actuating piston 26, while in its other operating position it is close to the open end face 44 of the Actuating piston 26 arrives.
- FIG. 3 shows further details of the actuating cylinder / actuating piston unit.
- the adjusting piston 26 is provided on its longitudinal outside with a number of annular grooves, such as the annular groove 46. These annular grooves serve for more effective lubrication of the actuating piston 26 in the actuating cylinder 24.
- the plunger 9 is held in an end opening of the actuating piston 26 by a lock ring 48 which is press-fitted or screwed onto the tapered, inner end of the plunger 9.
- the counter ring 48 is provided with a flange 50 to support the helical compression spring 29.
- the rod 32 is screwed into a threaded bore of the plunger 9 with a threaded end part 52, a ball 54 inserted between the end of the threaded end part 52 and the plunger 9 serving to secure the screw connection of the rod 32 with the plunger 9.
- Openings 56 are provided approximately centrally in the longitudinal wall of the slide 34. If the screw pressure 29 is compressed during operation, a vacuum is created between the collar 38 and the ring 42. The openings 56 serve to compensate for this vacuum and ensure that the compensating function of the compensating device formed from the parts 32, 34, 20 is not significantly impaired.
- the compensating function also acts in such a way that the working pressure of the pressure medium which occurs when the actuating piston 26 is intended to be adjusted, the supply of which to the actuating cylinder 24 is not shown in FIG. 3, initially only affects the sliding sleeve 34, since the swash plate 12 with the piston 8 working thereon opposes the adjustment of the adjusting piston 26, a resistance which is only gradually overcome.
- This compensation function also occurs when the load on the pistons 8 changes.
- FIGS. 1 and 2 indicate that four actuating cylinders 10 are provided, which are arranged approximately symmetrically with respect to the axis of rotation 4 of the drive device 14.
- the spring bodies 28, 29 are helical compression springs, wherein preferably two or more of these springs can be provided with different characteristics.
- the cradle 18 has two coaxially arranged pins 20 which are arranged in the housing of the axial piston machine 1 as a joint body, so that the cradle 18 can be pivoted and adjusted about the axis 22.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19807443A DE19807443A1 (de) | 1998-02-24 | 1998-02-24 | Axialkolbenmaschine |
DE19807443 | 1998-02-24 | ||
PCT/IB1999/000319 WO1999043925A1 (de) | 1998-02-24 | 1999-02-22 | Axialkolbenmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1058771A1 true EP1058771A1 (de) | 2000-12-13 |
Family
ID=7858572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99903848A Withdrawn EP1058771A1 (de) | 1998-02-24 | 1999-02-22 | Axialkolbenmaschine |
Country Status (11)
Country | Link |
---|---|
US (1) | US6425313B1 (de) |
EP (1) | EP1058771A1 (de) |
JP (1) | JP2002511914A (de) |
KR (1) | KR20010041268A (de) |
CN (1) | CN1291255A (de) |
AU (1) | AU2436499A (de) |
BR (1) | BR9908198A (de) |
DE (1) | DE19807443A1 (de) |
PL (1) | PL342520A1 (de) |
SK (1) | SK12672000A3 (de) |
WO (1) | WO1999043925A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1101977A3 (de) * | 1999-11-22 | 2006-09-13 | Renault s.a.s. | Leistungsverzweigungsgetriebe |
FR2801348B1 (fr) * | 1999-11-22 | 2002-06-07 | Renault | Organe hydraulique perfectionne |
DE10212539A1 (de) * | 2002-03-20 | 2003-10-23 | Continental Teves Ag & Co Ohg | Kolbeneinheit mit gefesselter Feder |
US7040638B2 (en) * | 2004-06-21 | 2006-05-09 | Jeffrey Eaton Cole | Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle |
WO2006002205A2 (en) | 2004-06-21 | 2006-01-05 | Cole Jeffrey E | Truck assembly for a skateboard, wheeled platform, or vehicle |
US7216876B2 (en) * | 2004-06-21 | 2007-05-15 | Cole Jeffrey E | Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle |
US7232139B2 (en) * | 2004-06-21 | 2007-06-19 | Cole Jeffrey E | Truck assembly for a skateboard, wheeled platform, or vehicle |
US7635136B2 (en) * | 2005-06-21 | 2009-12-22 | Jeffrey E. Cole | Truck assembly for a skateboard, wheeled platform, or vehicle |
US7730826B2 (en) * | 2007-07-31 | 2010-06-08 | Sauer-Danfoss Inc. | Swashplate type axial piston device having apparatus for providing three operating displacements |
DE102008038435A1 (de) * | 2007-08-20 | 2009-02-26 | Robert Bosch Gmbh | Hydraulisches System mit einer verstellbaren hydrostatischen Maschine |
DE102011113533A1 (de) * | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Hydrostatische Axialkolbenmaschine |
DE102017202826A1 (de) * | 2016-04-11 | 2017-10-12 | Robert Bosch Gmbh | Hydrostatische Axialkolbenmaschine |
DE102016117612A1 (de) * | 2016-09-19 | 2018-03-22 | Saurer Germany Gmbh & Co. Kg | Rahmenöffnungseinrichtung für einen Spulenrahmen |
US10138729B2 (en) * | 2016-10-20 | 2018-11-27 | Deere & Company | Drive assembly with pressure force aggregating piston arrangement for hydraulic motor speed/torque selector |
CH714321A1 (de) * | 2017-11-11 | 2019-05-15 | Liebherr Machines Bulle Sa | Verstellvorrichtung für eine Axialkolbenmaschine. |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3063381A (en) * | 1958-09-24 | 1962-11-13 | New York Air Brake Co | Engine |
GB1276657A (en) | 1968-09-21 | 1972-06-07 | Dowty Technical Dev Ltd | Hydraulic apparatus |
US3631763A (en) * | 1970-01-02 | 1972-01-04 | Sperry Rand Corp | Power transmission |
DE2037635A1 (de) * | 1970-07-29 | 1972-02-03 | Robert Bosch Gmbh, 7000 Stuttgart | Verstellbare Axialkolbenmaschine |
DE2655122A1 (de) * | 1976-12-04 | 1978-06-08 | Linde Ag | Einstellbare schraegscheibenaxialkolbenmaschine |
FR2503273B1 (fr) * | 1981-04-02 | 1986-02-21 | Messier Hispano Sa | Pompe hydraulique |
DE3135605A1 (de) * | 1981-09-09 | 1983-03-17 | Linde Ag, 6200 Wiesbaden | Einstellbare schraegscheiben-axialkolbenmaschine mit gleitgelagertem wiegenkoerper |
DE3346000A1 (de) * | 1982-12-21 | 1984-06-28 | Linde Ag, 6200 Wiesbaden | Hydraulische stelleinrichtung fuer eine hydrostatische maschine |
US4584926A (en) * | 1984-12-11 | 1986-04-29 | Sundstrand Corporation | Swashplate leveling and holddown device |
DE3711041C2 (de) * | 1987-04-02 | 1995-02-02 | Linde Ag | Einstellbare hydrostatische Kolbenmaschine |
DE3714888C2 (de) | 1987-05-05 | 1994-10-06 | Linde Ag | Einstellbare Axialkolbenmaschine |
JPH03242473A (ja) * | 1990-02-15 | 1991-10-29 | Daikin Ind Ltd | アキシャルピストン機械 |
US5226349A (en) * | 1992-07-15 | 1993-07-13 | Eaton Corporation | Variable displacement hydrostatic pump and improved gain control thereof |
DE4445255A1 (de) * | 1994-12-19 | 1996-06-20 | Sachsenhydraulik Gmbh | Axialkolben-Doppelpumpe |
-
1998
- 1998-02-24 DE DE19807443A patent/DE19807443A1/de not_active Withdrawn
-
1999
- 1999-02-22 AU AU24364/99A patent/AU2436499A/en not_active Abandoned
- 1999-02-22 BR BR9908198-9A patent/BR9908198A/pt not_active Application Discontinuation
- 1999-02-22 KR KR1020007009364A patent/KR20010041268A/ko not_active Application Discontinuation
- 1999-02-22 SK SK1267-2000A patent/SK12672000A3/sk unknown
- 1999-02-22 WO PCT/IB1999/000319 patent/WO1999043925A1/de not_active Application Discontinuation
- 1999-02-22 EP EP99903848A patent/EP1058771A1/de not_active Withdrawn
- 1999-02-22 CN CN99803171A patent/CN1291255A/zh active Pending
- 1999-02-22 PL PL99342520A patent/PL342520A1/xx unknown
- 1999-02-22 JP JP54332999A patent/JP2002511914A/ja active Pending
-
2000
- 2000-03-16 US US09/527,934 patent/US6425313B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9943925A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999043925A1 (de) | 1999-09-02 |
DE19807443A1 (de) | 1999-08-26 |
BR9908198A (pt) | 2000-10-24 |
KR20010041268A (ko) | 2001-05-15 |
CN1291255A (zh) | 2001-04-11 |
PL342520A1 (en) | 2001-06-18 |
SK12672000A3 (sk) | 2001-01-18 |
JP2002511914A (ja) | 2002-04-16 |
AU2436499A (en) | 1999-09-15 |
US6425313B1 (en) | 2002-07-30 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20000925 |
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17Q | First examination report despatched |
Effective date: 20020326 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: APIS ENERGY GMBH |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KANIS, LUBOMIR Inventor name: KAPITANCIKOVA, EMILIA Inventor name: KLEINEDLER, PETER |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18W | Application withdrawn |
Effective date: 20021214 |