US20090199705A1 - Axial piston machine and control plate for an axial piston machine - Google Patents

Axial piston machine and control plate for an axial piston machine Download PDF

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Publication number
US20090199705A1
US20090199705A1 US12/438,819 US43881907A US2009199705A1 US 20090199705 A1 US20090199705 A1 US 20090199705A1 US 43881907 A US43881907 A US 43881907A US 2009199705 A1 US2009199705 A1 US 2009199705A1
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US
United States
Prior art keywords
control plate
axial piston
piston machine
control
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.)
Abandoned
Application number
US12/438,819
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English (en)
Inventor
Martin Zug
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZUG, MARTIN
Publication of US20090199705A1 publication Critical patent/US20090199705A1/en
Abandoned legal-status Critical Current

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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
    • F04B1/2014—Details or component parts
    • F04B1/2042—Valves
    • F04B1/205—Cylindrical
    • 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
    • F04B1/2014—Details or component parts
    • F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve 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
    • F04B1/20—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
    • F04B1/2014—Details or component parts
    • F04B1/2042—Valves

Definitions

  • the present invention relates to an axial piston machine and to a control plate for such an axial piston machine.
  • pistons which are arranged longitudinally displaceably in cylinder bores of a cylinder drum perform a stroke movement on each revolution of the cylinder drum, which movement consists of a suction stroke and a pressure stroke.
  • a so-called control plate is situated at the end side of the cylinder drum, in which control plate there are generally formed kidney-shaped control openings for connecting the cylinder drum to a high-pressure connection and a low-pressure connection of the axial piston machine.
  • FIGS. 5 to 7 A conventional control plate, as is known from the prior art and described, by way of example in a similar form, in DE 102 51 552 B3, is illustrated in FIGS. 5 to 7 .
  • the control plate 100 has an outside diameter which corresponds to the inside diameter of a corresponding housing component of the axial piston machine. In the direction of the side facing away from the cylinder drum, the control plate 100 is supported on a housing cover, in which the high-pressure connection and the low-pressure connection of the axial piston machine are formed.
  • the control plate 100 has a plurality of control openings 101 and 102 distributed over its circumference, which are provided for connecting the cylinder drum to the low-pressure connection and to the high-pressure connection, respectively.
  • the control plate 100 furthermore has a central cutout which is penetrated by a shaft of the axial piston machine connected to the cylinder drum in a manner fixed against relative rotation. Adjoining this central cutout are two lateral indentations 103 which form a passage for leakage oil. Furthermore, in the edge region there is formed a groove 104 , as can be seen in particular from the illustration in FIG. 7 , which enables a rotation-locked positioning of the control plate 100 . According to the illustration in FIG.
  • this groove 104 cooperates with a pin 110 mounted in the housing of the machine, ensuring that, on the one hand, the plate 100 cannot be fitted in the axial piston machine in a manner rotated by 180° and, on the other hand, no rotation of the plate 100 occurs during operation either.
  • the object on which the present invention is now based is to specify a novel distributing or control plate for an axial piston machine which, on the one hand, is at least equivalent to the known control plates as regards its operating properties, but, on the other hand, can be produced more simply and cost-effectively.
  • the solution according to the invention is based on the idea of configuring the control plate in such a way that an outwardly extending extension surface is formed on a partial region of the outer circumference of the control plate, the extension surface being designed in such a way that it enables a defined bearing against a holding element of the axial piston machine in order to achieve a rotation locking for the control plate.
  • the extension surface may, for example, have a straight edge region which is suitable for bearing against a plane wall of a corresponding holding element.
  • an edge recess in the extension surface would also be conceivable or a protuberance, which can cooperate, for example, with an oval or cylindrically configured holding element or with a corresponding recess in the holding element, respectively.
  • a control plate for an axial piston machine having at least two control openings, by means of which cylinder bores of a cylinder drum rotatably mounted in a housing are alternately connected, on rotation of the cylinder drum, to a high-pressure connection and a low-pressure connection, is accordingly specified, it being provided according to the invention that an outwardly extending extension surface is formed on a partial region of the outer circumference of the control plate, the extension surface being designed for defined bearing against a holding element of the axial piston machine in order to achieve a rotation locking for the control plate.
  • the advantage of the solution according to the invention is that the known pin-and-groove connection for achieving the rotation locking can be dispensed with.
  • the rotation locking is achieved by a special shaping of the outer circumference or outer contour of the control plate, which affords the advantage that the edge recesses provided, for example, for this can be designed to be continuous, i.e. over the entire thickness of the control plate.
  • This means that it is possible to produce the control plate according to the invention in a simple manner by a stamping process, during which the outer contour, the inner contour and the kidney regions of the control plate can be created directly.
  • control plate could also be produced by laser cutting, in which case a finishing of the plane surfaces is then unnecessary, since a high-quality input stock with the required surface finish can be used. Both methods can be used only to a limited extent for the control plate according to the prior art, since the formation of the groove for the rotation locking can only be produced by machining the plate.
  • the concept according to the invention relate, in particular, to measures which can additionally reduce the material expenditure for and the space requirement of the control plate.
  • the outer edge region of the control plate is reduced in the radial direction in the region of the at least one control opening connected to the low-pressure connection.
  • the radially inner edge of the control plate may be designed as a centring surface which centres the control plate on a centring body on the housing. This centring surface may be composed of a plurality of partial surfaces formed on segments of the inner edge of the control plate which extend radially inwardly into the through-opening.
  • the radial extent of the individual recesses is, in this case, preferably of such a size that a gap results in the region of the recesses between the control plate and the centring body, which gap is suitable for allowing a leakage fluid which has accumulated in the interior of the cylinder drum to pass through.
  • an axial piston machine having a cylinder drum which is rotatably mounted in a housing and in which are made cylinder bores, in which pistons are axially displaceably arranged, the cylinder bores having openings towards an end side of the cylinder drum, which are alternately in connection, on a rotation of the cylinder drum, with a high-pressure connection and low-pressure connection via at least two control openings of a control plate, is furthermore proposed, the control plate being designed according to the above-described concept according to the invention.
  • the machine is designed as a swash-plate machine, it then being possible for the holding element for the rotation-locked positioning of the control plate to be formed by the setting piston guide.
  • FIG. 1 shows a schematic illustration of an axial piston machine configured according to the invention
  • FIG. 2 shows an illustration of a first exemplary embodiment of a control plate according to the invention
  • FIG. 3 shows the arrangement of the control plate according to the invention of FIG. 2 in the axial piston machine
  • FIG. 4 shows the arrangement of an alternative embodiment of a control plate according to the invention in an axial piston machine
  • FIGS. 5 to 7 show the configuration and arrangement of a control plate of an axial piston machine according to the prior art.
  • the axial piston machine according to the invention which is illustrated in FIG. 1 and provided generally with the reference symbol 1 is configured largely identically to the axial piston machine known from DE 102 51 552 B3.
  • the construction and function of the known components of the machine 1 will therefore be merely briefly summarised in the following.
  • the axial piston machine 1 has a shaft 3 which is rotatably mounted in a housing 2 and on which a cylinder drum 4 is arranged, the cylinder drum 4 and the shaft 3 being connected to one another in a manner fixed against relative rotation.
  • the shaft 3 penetrates the cylinder drum 4 and is mounted on both sides of the cylinder drum 4 with the aid of a rolling bearing 5 and 6 , respectively, the lower rolling bearing 6 having in particular an outer bearing race 7 which is inserted into a corresponding recess of a housing cover 8 of the axial piston machine 1 .
  • a plurality of cylinder bores 9 are formed in the cylinder drum 4 in a manner distributed over the circumference, the centre axes of the cylinder bores 9 running parallel or obliquely to the centre axis of the shaft 3 .
  • Inserted axially displaceably in these bores 9 are pistons 10 having, on the side facing away from the housing cover 8 , a spherical head 11 which cooperates with a corresponding recess of a slide shoe 12 to form a knuckle joint.
  • the piston 10 is supported on a swash plate 13 by means of the slide shoe 12 , so that on one revolution of the cylinder drum 4 , the pistons 10 accordingly perform an alternating stroke movement.
  • the length of stroke is predetermined here by the position of the swash plate 13 , which can be adjusted about a tilting axis running perpendicularly to the longitudinal axis of the shaft 3 .
  • an adjusting device 14 with a piston 50 which cooperates at its two ends with the swash plate 13 on the one hand and with a setting piston guide 51 on the other hand.
  • the configuration in particular of this cylinder-like or pot-like setting piston guide 51 will be explained in more detail at a later time.
  • the cylinder drum 4 has a central opening 15 , in which there is arranged a compression spring 16 which is clamped between a first spring bearing 17 and a second spring bearing 18 .
  • the first spring bearing 17 is fixed here in the axial direction on the shaft 3
  • the second spring bearing 18 is formed by a Seeger circlip ring inserted into a groove of the cylinder drum 4 .
  • the compression spring 16 Through the force of the compression spring 16 , the cylinder drum 4 is displaced in the axial direction to such an extent that its end face 19 bears sealingly on the control plate 20 .
  • control openings, not evident in the sectional illustration according to FIG. 1 , of the control plate 20 are, on each side facing away from the cylinder drum, in permanent contact with at least one high-pressure connection and one low-pressure connection of the axial piston machine 1 .
  • the cylinder bores 9 of the drum 4 are open towards the end face 19 of the cylinder drum 4 via corresponding openings 21 , these openings 21 , on rotation of the drum 4 , passing over the control plate and thereby being alternately connected to the control openings for the high-pressure connection and the low-pressure connection, respectively.
  • a through-opening of the control plate 20 has, for this purpose, a radial extent corresponding to the outer radial extent of a centring body which is connected to a housing component.
  • the centring body is formed by the outer bearing race 7 of the rolling bearing 6 .
  • the control plate 20 is supported on the housing cover 8 , and, to avoid leakage, the control plate 20 has a sealing surrounding area 28 which is formed on the side of the control plate 20 facing away from the cylinder drum 4 and cooperates sealingly with the surface of the housing cover 8 .
  • the central through-opening 30 has in this case a diameter corresponding to the outer circumference of the bearing race 7 of the rolling bearing 6 .
  • the inner edge 33 of the through-opening 30 accordingly forms the above-mentioned centring surface 29 .
  • the through-opening 30 is furthermore widened by two recesses 34 and 35 , between each of which segments are formed, so that the centring surface 29 is ultimately formed by the partial surface 29 . 1 and 29 . 2 on the segments.
  • a gap 22 (see FIG. 1 ) is formed partially at the circumference of the outer bearing race 7 , through which gap a leakage fluid can pass.
  • control plate 20 consists in an outwardly extending extension surface 40 in the upper region of the outer circumference.
  • This extension surface 40 is configured in a special way in its edge region 41 , in order to enable a defined bearing relative to a holding element of the axial piston machine. This enables a rotation-locked arrangement of the control plate 20 , despite dispensing with the pin-and-groove connection.
  • the extension surface 40 has a straight edge region 41 , which can accordingly cooperate with a plane wall of a holding element.
  • This setting piston guide has a cylinder 52 , the lower end of which rests on a disc 53 .
  • This disc 53 is in this case likewise cut off straight in its edge region 54 , so that the edge region 41 of the extension 40 of the control plate 20 can bear in a plane manner against the edge region of the disc 54 , as illustrated in FIG. 3 . This prevents in an effective way a rotation of the control plate 20 during the operation of the axial piston machine 1 .
  • control plate 20 The advantage of the configuration, according to the invention, of the control plate 20 is that the corresponding configuration of the edge region 41 of the extension 40 can extend over the entire height or thickness of the control plate 20 .
  • This enables production of the control plate 20 in a relatively simple and cost-effective manner.
  • a simple stamping-out of the control plate 20 would be conceivable, during which the outer contour, the inner contour and the kidney regions could be created at the same time. In this case, all that would still be required is a finishing on the two plane bearing surfaces of the control plate 20 .
  • an appropriately shaped blank could also be machined by laser cutting, in which case a finishing of the plane surfaces is then no longer required, since a high-quality input stock with the necessary surface finish can already be used.
  • FIGS. 2 and 3 Further measures concerning the shaping of the control plate 20 which additionally optimise the material expenditure and the space requirement can be gathered from FIGS. 2 and 3 .
  • the outer region 42 of the control plate may be reduced in the radial direction in the region of the low-pressure control opening 31 .
  • the space requirement and on the other hand the material expenditure is thus reduced.
  • openings are formed by appropriate indentations 43 and 44 in the edge region 41 of the extension surface and/or in an edge region of the control plate 20 opposite the extension surface 40 , which openings serve to carry off the pumping leakage oil without loss.
  • FIG. 4 shows an alternative embodiment of a control plate 20 according to the invention which differs in the configuration of the edge region of the extension surface 40 .
  • the control piston guide 51 is designed merely as an upwardly extending cylinder 52 , the edge region 41 of the extension surface 40 then having an edge recess 45 which cooperates with the cylindrical outer contour of the cylinder 52 .
  • a rotation of the control plate 20 during the operation of the axial piston machine is precluded by this configuration.
  • the present invention opens up the possibility of simpler and more cost-effective production of control plates for axial piston machines. At the same time, however, an exact arrangement and orientation of the control plate in the axial piston machine is ensured as before.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US12/438,819 2006-12-11 2007-12-10 Axial piston machine and control plate for an axial piston machine Abandoned US20090199705A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102006058356 2006-12-11
DE102006058356.6 2006-12-11
DE102007024174.9 2007-05-24
DE102007024174.9A DE102007024174B4 (de) 2006-12-11 2007-05-24 Axialkolbenmaschine mit einer Verdrehsicherung für die Steuerplatte
PCT/EP2007/010759 WO2008071374A1 (de) 2006-12-11 2007-12-10 Axialkolbenmaschine und steuerplatte für eine axialkolbenmaschine

Publications (1)

Publication Number Publication Date
US20090199705A1 true US20090199705A1 (en) 2009-08-13

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ID=39149348

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/438,819 Abandoned US20090199705A1 (en) 2006-12-11 2007-12-10 Axial piston machine and control plate for an axial piston machine

Country Status (4)

Country Link
US (1) US20090199705A1 (de)
EP (1) EP2100039A1 (de)
DE (1) DE102007024174B4 (de)
WO (1) WO2008071374A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016539285A (ja) * 2013-09-25 2016-12-15 ラビー, ヴィアニーRABHI Vianney 液圧ポンプ分配器用のシール・リング
US11162481B2 (en) * 2018-04-18 2021-11-02 Robert Bosch Gmbh Axial piston machine with pressure relief in the through drive space

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013215868A1 (de) 2013-08-12 2015-02-12 Robert Bosch Gmbh Bauteil für eine hydrostatische Axialkolbenmaschine und damit ausgestattete hydrostatische Axialkolbenmaschine
DE102013215866A1 (de) 2013-08-12 2015-02-12 Robert Bosch Gmbh Bauteil für eine hydrostatische Axialkolbenmaschine und damit ausgestattete hydrostatische Axialkolbenmaschine
DE102015212731A1 (de) 2015-07-08 2017-01-12 Robert Bosch Gmbh Gehäuse für eine hydrostatische Axialkolbenmaschine und hydrostatische Axialkolbenmaschine mit einem Gehäuse
GB201609351D0 (en) * 2016-05-26 2016-07-13 Rolls Royce Controls & Data Services Ltd Axial piston pump/motor
DE102017210010A1 (de) * 2017-06-14 2018-12-20 Robert Bosch Gmbh Hydrostatische Axialkolbenmaschine und Steuerplatte für die Axialkolbenmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060169072A1 (en) * 2002-11-05 2006-08-03 Josef Beck Axial pistion machine and a control plate for an axial piston engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3164191A (en) 1960-10-12 1965-01-05 Kaynar Mfg Co Snap-out fastener and channel assembly
DE3719520A1 (de) 1987-06-11 1988-12-22 Hydromatik Gmbh Axialkolbenmaschine mit einer zylindertrommel und einem steuerkoerper
DE3743125A1 (de) * 1987-12-18 1989-07-06 Brueninghaus Hydraulik Gmbh Axialkolbenpumpe
DE19503617C2 (de) * 1995-02-03 1999-06-02 Sauer Sundstrand Gmbh & Co Druckmittelaggregat mit variablem Hubvolumen
DE19539442A1 (de) 1995-10-24 1997-04-30 Sachsenhydraulik Gmbh Steuerscheibe für hydrostatische Kolbenmaschinen
DE29902339U1 (de) 1999-02-10 2000-01-27 Beck & Kaltheuner Fa Befestigungsvorrichtung zur lösbaren Verankerung eines feuerfesten Bauteiles an einem metallischen Bauteil
DE10206958A1 (de) 2002-02-19 2003-08-21 Linde Ag Hydrostatische Verdrängereinheit
DE102004010373A1 (de) 2004-03-03 2005-09-22 Bosch Rexroth Ag Axialkolbenmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060169072A1 (en) * 2002-11-05 2006-08-03 Josef Beck Axial pistion machine and a control plate for an axial piston engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016539285A (ja) * 2013-09-25 2016-12-15 ラビー, ヴィアニーRABHI Vianney 液圧ポンプ分配器用のシール・リング
US11162481B2 (en) * 2018-04-18 2021-11-02 Robert Bosch Gmbh Axial piston machine with pressure relief in the through drive space

Also Published As

Publication number Publication date
WO2008071374A1 (de) 2008-06-19
DE102007024174A1 (de) 2008-06-12
DE102007024174B4 (de) 2022-09-08
EP2100039A1 (de) 2009-09-16

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AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZUG, MARTIN;REEL/FRAME:022311/0799

Effective date: 20090205

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION