EP0189786B1 - Machine à pistons axiaux - Google Patents

Machine à pistons axiaux Download PDF

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Publication number
EP0189786B1
EP0189786B1 EP86100502A EP86100502A EP0189786B1 EP 0189786 B1 EP0189786 B1 EP 0189786B1 EP 86100502 A EP86100502 A EP 86100502A EP 86100502 A EP86100502 A EP 86100502A EP 0189786 B1 EP0189786 B1 EP 0189786B1
Authority
EP
European Patent Office
Prior art keywords
disc body
oblique disc
recess
piston machine
housing
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.)
Expired
Application number
EP86100502A
Other languages
German (de)
English (en)
Other versions
EP0189786A3 (en
EP0189786A2 (fr
Inventor
Rolf Rohde
Herbert Kurz
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.)
Hydromatik GmbH
Original Assignee
Hydromatik 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 Hydromatik GmbH filed Critical Hydromatik GmbH
Publication of EP0189786A2 publication Critical patent/EP0189786A2/fr
Publication of EP0189786A3 publication Critical patent/EP0189786A3/de
Application granted granted Critical
Publication of EP0189786B1 publication Critical patent/EP0189786B1/fr
Expired legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S384/00—Bearings
    • Y10S384/90—Cooling or heating
    • Y10S384/906—Antirotation key
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • Y10T74/18336—Wabbler type

Definitions

  • the invention relates to an axial piston machine according to the preamble of claim 1.
  • the invention is based on the object of designing an axial piston machine of the type described at the outset in such a way that, in a space-saving design, a technically simple, assembly-friendly and stable rotation lock is achieved.
  • the swashplate body with its round circumferential surface, of which at least one axis lies outside the common axis is inserted in a form-locked manner in a recess of the housing shaped correspondingly to this circumferential surface.
  • a round circumferential surface is to be understood, for example, as a circular circumferential surface, one axis of which lies outside the common axis of the swashplate body and the drive shaft, i.e. is a circumferential surface that is eccentric to this common axis, or an oval or elliptical circumferential surface, of which at least one of the axes of symmetry lies outside of said common axis.
  • the desired rotation lock is obtained automatically because the swash plate body is inserted in a form-fitting manner in the housing without additional fastening and is secured in the recess.
  • the desired stability results from the fact that on the one hand practically the entire circumferential surface of the swashplate body is included in the anti-rotation device, which results in a low surface pressure, and on the other hand the anti-rotation device is effective at a large distance from the axis of the swashplate body with respect to the size of the swashplate body , whereby the forces acting on the swashplate body in the circumferential direction are reduced.
  • Another advantage of the configuration according to the invention is that no additional components are required for the rotation lock, as is the case with the known configuration. This is important for manufacturing reasons and also for reasons of simple assembly and disassembly. In the embodiment according to the invention, it is only necessary to insert the swashplate body with its round peripheral surface into the correspondingly shaped recess of the housing.
  • the configuration according to the invention is suitable both for the axial piston pumps with a constant delivery volume and for those with a variable delivery volume and also for those in which the direction of rotation is reversible.
  • a swivel bearing and an adjustment mechanism for swiveling the swash plate are required.
  • the term swashplate body includes not only the swashplate itself, but also its base plate, on which it is supported as a pivotable part on the housing.
  • the configuration according to the invention is suitable both for pump operation and for motor operation of these axial piston machines.
  • the axial piston machine consists of a housing 1 with a fastening flange 2 and a housing cover 3 at the end opposite the fastening flange 2.
  • an axially extending drive shaft 4 is mounted in roller bearings 5, 6, on which a cylinder drum 7 is rotatably mounted within the housing 1 and has a plurality of axially extending cylinder bores on a pitch circle, in which pistons 9 are displaceable.
  • the pistons have at their ends facing the mounting flange 2 piston heads 11 which are received in a known manner in slide shoes 12 and are axially supported with these slide shoes 12 on the inclined surface 13 of a swash plate 14 which is penetrated by the drive shaft 4 in a through opening 10 .
  • the swash plate 14, in which the roller bearing 5 for receiving the drive shaft 4 is received and secured by a bearing cover 15, has two cylindrical peripheral surfaces 16, 17 with different diameters d, D, which are arranged eccentrically to one another.
  • the eccentricity is designated E in FIG. 3.
  • the smaller-diameter cylindrical peripheral surface 16 is further away from the inclined surface 1 than the larger cylindrical peripheral surface 17.
  • the diameter ratio is approximately 1: 1.15.
  • the smaller cylindrical peripheral surface 16 - viewed axially - is arranged within the larger cylindrical peripheral surface 17, so that a shoulder in the form of a stepped surface 18 results on the entire surface of the swash plate 14.
  • the housing 1 has a recess generally designated 19 for receiving the swash plate 14, the recess being stepped in diameter, the larger cylindrical inner peripheral surface 21, the smaller cylindrical inner peripheral surface 22 and the shoulder extending between these two in the form of a step surface 23 correspond to the shape of the relevant surfaces on the swash plate 14 due to the same eccentricity E.
  • the swash plate 14 can therefore be inserted approximately closing from the inside into the recess 1, wherein due to the eccentric arrangement of the peripheral surfaces 16, 22; 17, 21 and the presence of the stepped surfaces 18, 23 results for the swash plate 14 both in the circumferential direction 24 effective rotation lock and in the direction facing away from the cylinder drum 7 effective axial lock.
  • a special axial securing in the area of the recess 19 in the direction of the cylinder drum 17 is not required, because during operation of the axial piston pump, the piston / slide shoe arrangement, generally designated 25, acts on the swash plate 14 in the direction of the step surfaces 18, 23 and thus secures in their position.
  • a compression spring 26 is present, which acts on the piston / slide shoe arrangement 25 in the direction of the swash plate 14, whereby it is supported on the cylinder drum 7 and by means of a dome-shaped, axially displaceable sleeve 27 and a holding plate 28 for the slide shoes 12 on the latter works.
  • the compression spring 26 acts simultaneously on the non-rotatable, but axially displaceably mounted on the drive shaft 4 cylinder drum 7 against the control surface of a control disk 29.
  • the control disk 29 and the suction and pressure lines extending through it correspond in principle to conventional designs and are therefore not to be described.
  • the swash plate 14 is acted upon in the circumferential direction 24 due to the inclined surface 14 and the rotary movement of the cylinder drum 7. Due to the eccentric arrangement of the peripheral surfaces 16, 22; 17, 21, which present as form-fitting surfaces extending transversely to the circumferential direction 24, the rotation lock of the swash plate 14 is ensured.
  • the eccentricity E results in a pulling contact between these peripheral surfaces, which is equivalent to a damped stop.
  • Another hydraulic Damping is provided by the fact that the oil film present between these peripheral surfaces acts as damping. The oil film can therefore between the peripheral surfaces 16, 22; 17, 21 continue because the sealing ring 31 for sealing the swash plate 14 on the outside from the peripheral surfaces 16, 22; 17, 21 is arranged.
  • the assembly or disassembly of the swash plate 14 takes place through the opening of the housing 1 which can be closed with the cover 3 and which is of correspondingly large size.
  • the drive shaft 4 is secured by means of the bearing 5 in the swash plate 14 against displacement in both axial directions, on the one hand by the bearing cover 15 and on the other hand by a locking ring 32.
  • the swash plate 14 and the drive shaft 4 optionally with the cylinder drum 7 and the piston-shoe arrangement 25 represent a preassembled component.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Claims (5)

1. Machine à pistons axiaux avec un corps de plateau oblique (14) monté, en étant empêché de tourner, dans un évidement (19) d'un boîtier (1), avec un arbre moteur (4) tournant dans le corps de plateau oblique et avec un barillet tournant (7) couplé à l'arbre moteur, dans lequel une pluralité de pistons (9) sont coulissants dans des cylindres, les têtes (11) de ces pistons prenant appui au moyen de patins (12) sur la surface oblique du corps de plateau oblique (14), tandis que de son côté le corps de plateau oblique (14) s'appuie sur une surface de butée (18) s'étendant transversalement au sens de l'axe, ménagée dans le boîtier (1) dans un sens opposé au barillet (7), caractérisée en ce que le corps de plateau oblique (14) présente une surface périphérique ronde (17) dont au moins un axe se trouve en dehors de l'axe commun du corps de plateau oblique (14) et de l'arbre moteur (4), le corps de plateau oblique (14) prenant appui au moyen de ladite surface périphérique (17), de manière complémentaire quant à sa forme, sur une grande partie de sa périphérie, avec une faible pression entre les surfaces, contre la par de l'évidement (19), laquelle a une forme complémentaire d celle de ladite surface périphérique (17), le corps de plateau oblique (14) étant monté dans le boîtier (1) sans fixation supplémentaire, de telle sorte qu'entre la surface périphérique (17) du corps de plateau oblique et la surface périphérique de l'évidement (19) un film d'huile à effet amortisseur se forme lors du fonctionnement.
2. Machine à pistons axiaux selon la revendication 1, caractérisée en ce que sont ménagées, sur le corps de plate oblique (14) et dans l'évidement (19), deux surfaces périphériques cylindriques (16, 17; 21, 22) disposées l'une derrière l'autre dans le sens axial, excentrées (E) l'une par rapport à l'autre, l'une de ces surfaces constituant la surface périphérique ronde.
3. Machine à pistons axiaux selon la revendication 2, caractérisée en ce que les surfaces périphériques cylindriques (16, 21; 17, 22) présentent des diamètres (d, D) différents et que les surfaces périphériques plus petites (16, 21) sont situées à l'intérieur d'une enveloppe imaginaire constituée par les surfaces périphériques plus grandes (17, 22).
4. Machine à pistons axiaux selon la revendication 3, caractérisée en ce que la surface de butée (18) est disposée, dans le sens axial, entre les surfaces périphérique (16, 17) plus grande et plus petite.
5. Machine à pistons axiaux selon une des revendications 2 à 4, caractérisée en ce que le corps de plateau oblique (14) est en outre maintenu, pour l'empêcher de coulisser en direction du barillet (7), par un ressort (26) tendant à le repousser en direction de l'évidement (19).
EP86100502A 1985-02-01 1986-01-16 Machine à pistons axiaux Expired EP0189786B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3503437 1985-02-01
DE3503437A DE3503437C2 (de) 1985-02-01 1985-02-01 Axial-Kolbenmaschine

Publications (3)

Publication Number Publication Date
EP0189786A2 EP0189786A2 (fr) 1986-08-06
EP0189786A3 EP0189786A3 (en) 1987-09-16
EP0189786B1 true EP0189786B1 (fr) 1989-10-04

Family

ID=6261419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100502A Expired EP0189786B1 (fr) 1985-02-01 1986-01-16 Machine à pistons axiaux

Country Status (4)

Country Link
US (1) US4771677A (fr)
EP (1) EP0189786B1 (fr)
JP (1) JPS61178568A (fr)
DE (2) DE3503437C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0733820B2 (ja) * 1988-09-12 1995-04-12 川崎重工業株式会社 斜板式ピストンポンプモータ
DE4340061C2 (de) * 1993-11-24 1997-02-20 Linde Ag Axialkolbenmaschine in Schrägscheibenbauart
IT1278540B1 (it) * 1995-12-20 1997-11-24 Faip S R L Off Mec Pompa per acqua ad alta pressione
US5979294A (en) * 1996-02-08 1999-11-09 Whitemoss, Inc. Method and apparatus for controlling axial pump
DE19756277A1 (de) * 1997-12-18 1999-07-01 Peter Kleinedler Schleifscheibe für Axialkolbenmaschinen
US6675697B1 (en) 1998-12-07 2004-01-13 Apis Energy Gmbh Inclined plate for axial piston motors
US6224062B1 (en) * 1998-12-30 2001-05-01 Paul J. DeCanio Roller skate and skateboard bearing covers

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE140375C (fr) *
DE584665C (de) * 1933-09-22 Heinz Krienelke Kolbenpumpe
US2061144A (en) * 1932-04-12 1936-11-17 Stoutz Robert De Piston spinning pump
US2459786A (en) * 1945-03-12 1949-01-25 Beaman Bernard Hydraulic pressure pump or motor
US2776627A (en) * 1952-07-10 1957-01-08 Vickers Inc Power transmission
GB791992A (en) * 1955-09-19 1958-03-19 Sundstrand Machine Tool Co Improvements in or relating to hydraulic pump or motor
US2915974A (en) * 1956-07-28 1959-12-08 Danfoss Ved Ingenior Mads Clau Double-acting rotary piston pump
US2987046A (en) * 1958-06-06 1961-06-06 Blackhawk Mfg Co Ram assemblage
US3007420A (en) * 1959-10-07 1961-11-07 Budzich Tadeusz Hydraulic pump or motor
DE1453495A1 (de) * 1963-11-05 1969-01-23 Unipat Ets Axialkolbenmaschine
US3177665A (en) * 1963-11-20 1965-04-13 Sundstrand Corp Hydrostatic transmission
LU47926A1 (fr) * 1965-02-06 1965-04-06
FR1488511A (fr) * 1966-07-25 1967-07-13 Boulton Aircraft Ltd Perfectionnements aux pompes et moteurs hydrauliques
GB1201030A (en) * 1966-12-01 1970-08-05 Boulton Aircraft Ltd Swash plate pump or motor
GB1593545A (en) * 1978-05-30 1981-07-15 Price E Bolts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Dubbel, Taschenbuch für den Maschinenbau, 13. Auflage, 1970, Seiten 681-684 *

Also Published As

Publication number Publication date
DE3503437C2 (de) 1987-01-22
DE3503437A1 (de) 1986-08-14
EP0189786A3 (en) 1987-09-16
US4771677A (en) 1988-09-20
JPS61178568A (ja) 1986-08-11
DE3666061D1 (en) 1989-11-09
EP0189786A2 (fr) 1986-08-06

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