EP1049874A1 - Axial piston pump - Google Patents
Axial piston pumpInfo
- Publication number
- EP1049874A1 EP1049874A1 EP99903678A EP99903678A EP1049874A1 EP 1049874 A1 EP1049874 A1 EP 1049874A1 EP 99903678 A EP99903678 A EP 99903678A EP 99903678 A EP99903678 A EP 99903678A EP 1049874 A1 EP1049874 A1 EP 1049874A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axial piston
- swash plate
- shaft
- pump housing
- piston pump
- 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
- 230000003068 static effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
- F04B1/14—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 stationary cylinders
Definitions
- the invention relates to an axial piston pump with a pump housing, a motor-driven shaft, a swash plate rotatably connected to the shaft and a number of pistons which can be moved back and forth by means of the swash plate, as described for example in DE 44 45 522 AI.
- Such axial piston pumps are used, among other things. used in electronic braking systems for motor vehicles, which can be equipped with controlled devices for preventing the locking of individual wheels when braking, for preventing the driven wheels from spinning and other devices for active vehicle stabilization.
- electronic braking systems for motor vehicles which can be equipped with controlled devices for preventing the locking of individual wheels when braking, for preventing the driven wheels from spinning and other devices for active vehicle stabilization.
- the object is therefore to develop an axial piston pump of the type mentioned at the outset in such a way that the disadvantages mentioned can be overcome.
- the flow of power should be better manageable and, on the other hand, the edge position of the channels in the housing should be avoided as far as possible, so that more favorable design options can be created for the external connections.
- the available space for example an electronic braking system, should be used optimally.
- a central bore is provided in the pump housing, through which an extension of the shaft extends, at the end of which the swash plate is arranged outside the pump housing.
- the swash plate is advantageously arranged in a cover, which can be designed as a valve block or electronics box of an electronic braking system.
- the pump pistons are advantageously arranged between the swash plate and the pump drive motor. It is also proposed that the piston by means of Return springs are clamped between the swash plate and the inner end of the holes.
- a shaft bearing is expediently axially supported on the surface of a stepped bore of the pump housing, which is opposite the inner end of the bores.
- the proposal according to the invention has the great advantage that the frictional connection takes place via the extension of the shaft which is subjected to tension and that only the part between the bearing and the inner end of the bores is subjected to pressure in the main direction of force from the housing.
- the frictional connection is closed via the bearing which is subjected to pressure and the pistons and return springs which are also subject to pressure and via the swashplate which is subjected to bending.
- the housing essentially only has to absorb lateral forces, i.e. the components that are not parallel to the axis of the shaft or the bores.
- the required larger space requirement for the bores in the radial direction does not play a major role, because the pump housing for the attachment of the drive motor usually has to be made larger transversely to the shaft axis than is required for accommodating the bores for the pistons.
- the larger space requirement in the radial direction is compensated for by a smaller space requirement of the pump housing in the axial direction, because the channels for the supply and discharge of the fluid are no longer arranged on the edge, but at a medium height of the housing and because only in the central part the bearing height, the piston length and the thickness of the swash plate including the bearing-dependent full height of the pump housing must be realized.
- Figure 1 shows a longitudinal section through the central part of a pump housing (1) for an axial piston pump according to the invention.
- the motor-driven shaft 2 has an extension 9, on the end of which a swash plate 3 with an axial bearing 13 is rotatably attached.
- a bearing 6 is arranged between the shaft 2 and the pump housing 1, via which radial and axial forces can be transmitted from the shaft 2 to the pump housing 1.
- holes 7 for pistons 4 and return springs 5, preferably rounded on the end face, are arranged parallel to the shaft axis, the inner ends 10 of which lie opposite a surface 11 of the stepped bore 12 formed in the housing 1 for the bearing 6.
- the material region of the pump housing 1 lying between the inner ends 10 of the bores 7 and the surface 11 is the only part of the pump housing that has to absorb forces in the main direction of attack parallel to the shaft axis. Adjacent to the inner ends 10 are the bores 7 with channels 14 and 15 formed in the pump housing 1 for the supply and discharge of the Media connected.
- the extension 9 of the shaft 2 is carried out according to the invention through a central bore 8 in the pump housing 1, which is closed by a cover 16 which overlaps the swash plate 3 and which does not have to be part of the pump housing.
- the cover is designed as a valve block and / or electronics box of an electronically controlled braking system.
- the pistons are therefore preferably arranged between the swash plate 3 and the motor (not shown) driving the pump 1.
- a receiving area 17 for the arrangement of the drive motor for the shaft 2 is provided in the pump housing 1.
- the delivery chambers formed between the end face of the pistons 4 and the inner end of the bores 7 are no longer on the edge side in the housing 1, so that for the arrangement of the channels 14, 15 for supplying and removing the delivery medium and their external Connections there are better design options.
- the pump housing 1 can be kept flatter overall, because only the central area must have the full height due to the dimensions of the bearing 6, the return springs 5, the piston 4 and the swash plate 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803533A DE19803533A1 (en) | 1998-01-30 | 1998-01-30 | Axial piston pump |
DE19803533 | 1998-01-30 | ||
PCT/EP1999/000448 WO1999039100A1 (en) | 1998-01-30 | 1999-01-26 | Axial piston pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1049874A1 true EP1049874A1 (en) | 2000-11-08 |
EP1049874B1 EP1049874B1 (en) | 2003-05-02 |
Family
ID=7856093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99903678A Expired - Lifetime EP1049874B1 (en) | 1998-01-30 | 1999-01-26 | Axial piston pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1049874B1 (en) |
JP (1) | JP2002502007A (en) |
DE (2) | DE19803533A1 (en) |
WO (1) | WO1999039100A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008014974B4 (en) * | 2008-03-19 | 2016-06-23 | Schaeffler Technologies AG & Co. KG | Swash bearing and method for its production |
JP4740983B2 (en) * | 2008-06-18 | 2011-08-03 | 三菱電機株式会社 | Fuel supply device |
CN102966504B (en) * | 2012-12-10 | 2015-08-12 | 西安航空动力控制科技有限公司 | With baffle-type check valve without the axial piston pump of piston shoes without oil distribution casing |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1877285A (en) * | 1931-10-01 | 1932-09-13 | Eckels Engineering Corp | Swash plate |
US2998827A (en) * | 1958-04-14 | 1961-09-05 | Ernest E Cook | Valve construction for fluid pressure pump and the like |
DE1234529B (en) * | 1963-11-13 | 1967-02-16 | Teves Kg Alfred | Axial roller bearings of the head swash plate of an axial piston pump |
DE1453532A1 (en) * | 1964-04-07 | 1969-09-25 | Walter Hunger | Hydraulic support devices for motor vehicles that can be operated by hand or by electric motor |
FR1407267A (en) * | 1964-06-20 | 1965-07-30 | Sarl Rech S Etudes Production | Advanced hydraulic pump, barrel and fluid bearings |
JPS5011086B1 (en) * | 1967-06-14 | 1975-04-26 | ||
DE3347307A1 (en) * | 1983-12-28 | 1985-07-11 | Speck-Kolbenpumpen-Fabrik Otto Speck Kg, 8192 Geretsried | PLUNGER PUMP |
DE4203619C2 (en) * | 1992-02-07 | 1996-07-25 | Rexroth Mannesmann Gmbh | Hydraulic system |
DE4303205A1 (en) * | 1993-02-04 | 1994-08-11 | Teves Gmbh Alfred | Pump, made of material produced in a continuous process, with a valve block, especially for a controlled braking system |
DE4445522C2 (en) | 1994-12-20 | 1998-05-14 | Kaercher Gmbh & Co Alfred | Piston pump for a high pressure cleaning device |
-
1998
- 1998-01-30 DE DE19803533A patent/DE19803533A1/en not_active Withdrawn
-
1999
- 1999-01-26 WO PCT/EP1999/000448 patent/WO1999039100A1/en active IP Right Grant
- 1999-01-26 DE DE59905314T patent/DE59905314D1/en not_active Expired - Lifetime
- 1999-01-26 JP JP2000529539A patent/JP2002502007A/en active Pending
- 1999-01-26 EP EP99903678A patent/EP1049874B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9939100A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1049874B1 (en) | 2003-05-02 |
WO1999039100A1 (en) | 1999-08-05 |
JP2002502007A (en) | 2002-01-22 |
DE19803533A1 (en) | 1999-08-05 |
DE59905314D1 (en) | 2003-06-05 |
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