EP0928895B1 - Machine à pistons axiaux avec support - Google Patents

Machine à pistons axiaux avec support Download PDF

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Publication number
EP0928895B1
EP0928895B1 EP99100023A EP99100023A EP0928895B1 EP 0928895 B1 EP0928895 B1 EP 0928895B1 EP 99100023 A EP99100023 A EP 99100023A EP 99100023 A EP99100023 A EP 99100023A EP 0928895 B1 EP0928895 B1 EP 0928895B1
Authority
EP
European Patent Office
Prior art keywords
stop
piston machine
axial piston
axial
swivel
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 - Lifetime
Application number
EP99100023A
Other languages
German (de)
English (en)
Other versions
EP0928895A2 (fr
EP0928895A3 (fr
Inventor
Josef Beck
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.)
Brueninghaus Hydromatik GmbH
Original Assignee
Brueninghaus 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 Brueninghaus Hydromatik GmbH filed Critical Brueninghaus Hydromatik GmbH
Publication of EP0928895A2 publication Critical patent/EP0928895A2/fr
Publication of EP0928895A3 publication Critical patent/EP0928895A3/fr
Application granted granted Critical
Publication of EP0928895B1 publication Critical patent/EP0928895B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • F04B1/126—Piston shoe retaining means

Definitions

  • the invention has for its object in an axial piston machine present type constraints between the retraction device and the support member avoid and still ensure a safe support.
  • the distance is independent of the swivel angle of the swivel plate. This results in a Contact between the retraction device and the stop only with an axial Overloading the retraction device, with the retraction device at the stop is supported and stabilized.
  • the axial distance is preferably only so large that the Retraction device for a large axial load or overload by the Retraction forces against the stop before the retractor over their deformed elastic deformation range or beyond its yield strength or is bent. This ensures that the retraction device only Load peaks come into contact with the support envelope and then are effectively supported becomes. When the load or overload ceases, the retractor returns due to their elasticity back to their starting position.
  • the configuration according to the invention is distinguished characterized in that the distance between the retraction device and the stop in entire swivel range of the swivel plate is essentially the same.
  • the stop can be rounded and / or have the shape of a stop ridge.
  • the stop can have a shape that is applied to the stop ridge Flanks is limited, of which one flank is essentially parallel to the Support plane of the swivel plate extends in its zero position and the other flank itself parallel to the support plane of the swivel plate in its maximum swiveled-out position extends.
  • An advantageous form of the support part is given when the one flank in lies on a transverse plane and the other flank is around the first flank maximum swivel angle is angled towards the cylinder drum.
  • the stop ridge can laterally with respect to an axial plane containing the pivot axis or other side may be offset or spaced.
  • the main parts of the axial piston machine are a housing 2 with a housing wall 2a visible in section in the drawing, the one Encloses interior 3, in which a cylinder drum 5 with a shaft 4 several, preferably distributed on a pitch circle and directed longitudinally Cylinder bores 6 is arranged, a plurality of pistons 7, which are in the cylinder bores 6 are axially displaceable, a plurality of sliding shoes 8 which are pivotable, but axially fixedly connected to spherical piston heads 9 at one end of the pistons 7, a swash plate 11, on the inclined surface 12 of the sliding shoes 8 and axially are supported, the swivel plate 11 about a right angle to the longitudinal central axis the axial piston machine 1 or the axis of rotation 13 of the shaft 4 Swivel axis 14 in a swivel bearing 14a by an adjustment device (not shown) is pivotable and is lockable in the respective pivot position, a retraction device 15, the purpose of which is to place the sliding
  • the retraction device 15 is through a perforated disc 22 in the number of Sliding shoes 8 existing holes 23 formed, the edges of the holes, the sliding shoes 8 in Area surrounded by tapered glide heads with play and with their Swivel plate 11 facing side on a foot flange 24 of the associated Slide shoe 8 abut so that the foot flange 24 with little movement between the inclined surface 12 and the perforated disc 22 is held.
  • the perforated disc 22 itself on its side facing away from the swivel plate 11 on a spherical ring section Bearing surface on an inner support ring 26.
  • the retention device 16 is mirrored by one or two each other oppositely arranged and formed support parts 31 formed in the area project the pivot axis 14 radially inward from the peripheral wall 2a of the housing 2 and engage the retraction device 15 with an axial distance a.
  • the support parts 31 are preferably separate components which are fastened on the inside to the peripheral wall 2a, preferably by screws 32. It is advantageous to position the Support parts 31 radial and preferably also axial positioning surfaces 33a, 33b on the Provide peripheral wall 2a, on which the support members 31 with corresponding surfaces abut and in particular are positioned axially so that the screws 32 in the positively positioned position of the support members 31 fulfill their fastening function.
  • the support parts 31 have a radially inwardly projecting support leg 31a and a axially extending support leg 31b angularly shaped, above the screws 32 through the peripheral wall 2a from the outside in through holes 34 and in Hold threaded holes 35 in the support parts 31, here in the support legs 31b.
  • the Screw heads 32a are preferably in extensions of the through holes 34 arranged sunk.
  • the positioning surfaces 33a, 33b are through recesses 33c in the form of cylindrical sections in the inner surface of the peripheral wall 2a formed, the ends of the swivel plate 11 facing each by a radial step surface forming the associated positioning surface 33a is limited.
  • the Recesses 33c are in the axial direction facing the cylinder drum 5 open.
  • the distance a is small and can be about a few tenths of a millimeter to about 1 mm or up be about 2 mm.
  • the size of the distance a depends on the flexibility of the Construction.
  • the distance a is at a maximum such that the retraction device 15 in the event of an axial overload in the direction of the retaining device 16 against the latter generally designated 36 stop on the associated support member 31 before the Retraction device 15 beyond their elastic deformation range or beyond their Yield point is deformed or bent.
  • the stop 36 can be rounded by a Be formed stop surface, the radial distance ra to the pivot axis 14 in the Swinging direction of the swash plate 11 increases. Hikes in this configuration the anchor point when swiveling outwards and swiveling back again Inside.
  • the or the support parts 31 have one in their central region radially extending rounded or angular stop projection or stop ridge 36a, which is preferably located in the central swivel range and from which can extend to both sides stop flanks 36b, 36c, one of which Stop flank 36b extends approximately at right angles to the axis of rotation 13 and the other Stop flank 36c is approximately parallel to the swivel plate 11 in its maximum Swing position extends.
  • the stop flank 36b extends approximately parallel to the Back surface 37 of the retaining device 16 or perforated disk 22 in its zero position, and the stop flank 36c extends parallel to the back surface 37 at the maximum Pivotal position of the retraction device 15.
  • the of the stop flanks 36b, 36c included, open to the cylinder drum 5 angle is denoted by b.
  • the Offset of the stop 36 or stop ridge 36a with respect to the pivot axis 14 and the longitudinal center plane E containing the axis of rotation 13 is denoted by V.
  • the distance a remains in all Pivotal positions of the swivel plate 11 are essentially the same.
  • the recesses 33c also correspond to the offset V of the stop ridge 36a offset with respect to the longitudinal center plane E. 4 and 5 is a the tilting moment resulting from the stop is limited to an average value.
  • the stop flanks 36b, 36c can be one indicated acute angle c with the back surface 37 in the zero position and in the maximum Include swivel position up to about 5 °, e.g. B. can be about 0.5 to 5 °.
  • the axial distance a remains in each Swivel position of the swivel plate 11 is the same size.
  • the last one described Modification with the angle c has the advantage that in the functional mode Overload a hydrodynamic lubricating film between the respective stop flank 26b, 26c and the back surface 37 can build, which improves the lubrication will reduce friction and wear.
  • the axial piston machine 1 consists in a Device 41 for automatic lubrication of the rotating shaft 13 on both sides Swivel bearing 42.
  • the lubrication device 41 has lubrication channels 43 which differ from the sliding surface 12, in particular of known, in the foot surface of the sliding shoes 8 existing pressure pockets, extend to the pivot bearings 42.
  • This improved lubrication enables the pivot bearings 42 to be formed by plain bearings with plain bearing shells 46, as shown in FIG. 1. It is also advantageous if the lubrication channels 43 in the circumferential direction of the Open pivot bearing 42 extending lubrication grooves 44.
  • the load peaks described above can occur both when the pistons 7 exert a tensile force on the retraction device 15 and / or then, if there is an increased leakage oil pressure or an increased interior pressure that exists between the Slip shoes 8 and the swivel plate 11 takes effect, the slide shoes 8 from the Seek to remove the swivel plate 11.

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

Claims (11)

  1. Machine à pistons axiaux (1) comprenant un boítier (2), dans l'espace intérieur (3) duquel est logé un tambour de cylindre (5), dans lequel sont conçus plusieurs alésages de cylindre (6) agencés à peu près axialement, dans lesquels sont guidés de façon mobile des pistons (7), qui s'appuient au moyen de patins de glissement (8) sur un disque pivotant (11) pouvant basculer autour d'un axe de pivotement (14), avec un dispositif de recul (15), sur lequel les patins de glissement (8) s'appuient lors du mouvement de recul des pistons (7), et qui présentent une distance (ra) à l'axe de pivotement (14), et avec au moins une partie support (31) disposée sur le boítier pour le soutien du dispositif de recul (15) sur le boítier (2), la partie support (31) étant disposée dans la zone de l'axe de pivotement (14) du disque pivotant (11) au moins sur le côté de la machine à pistons axiaux (1), sur laquelle les pistons (7) exécutent une course d'admission, la partie support (31) présentant une butée (36) espacée du dispositif de recul (15) et la distance axiale (a) entre le dispositif de recul (15) et la butée (36) étant sensiblement indépendante de l'angle de pivotement du disque pivotant (11).
  2. Machine à pistons axiaux selon la revendication 1,
    caractérisée en ce que la distance axiale (a) est seulement suffisamment grande pour que le dispositif de recul bute contre la butée (36) dans le cas d'une surcharge axiale, avant qu'il soit déformé ou tordu au-delà de sa limite d'élasticité.
  3. Machine à pistons axiaux selon la revendication 1 ou 2,
    caractérisée en ce que la butée (36) est disposée dans la plage angulaire d'un angle (b) ouvert en direction du tambour de cylindre (5), dont une branche (36b) s'étend parallèlement au disque pivotant (11) dans sa position neutre et dont l'autre branche (36c) s'étend à peu près parallèlement au disque pivotant (11) dans sa position de pivotement maximale.
  4. Machine à pistons axiaux selon l'une quelconque des revendications précédentes 1 à 3,
    caractérisée en ce que la butée (36) a une surface de butée tournée vers le dispositif de recul (15), qui est arrondie de façon convexe.
  5. Machine à pistons axiaux selon l'une quelconque des revendications précédentes 1 à 4,
    caractérisée en ce que la butée (36) présente un sommet de butée (36a) arrondi ou en forme d'arête, à partir duquel s'étendent vers les deux côtés des surfaces de butée (36b, 36c), dont un flanc de butée (36b) s'étend parallèlement au disque pivotant (11) dans sa position neutre ou forme avec ce disque un angle (c) aigu de jusqu'à de préférence environ 5° et l'autre flanc de butée (36c) s'étend parallèlement au disque pivotant (11) dans sa position de basculement maximale ou forme avec celui-ci un angle (c) aigu de jusqu'à de préférence environ 5°.
  6. Machine à pistons axiaux selon l'une quelconque des revendications précédentes 1 à 5,
    caractérisée en ce que la butée (36) ou le sommet de butée (36a) est décalé en travers (figure 3) par rapport à un plan (E) axial, contenant l'axe de pivotement (14) et de préférence également l'axe de rotation (13) du tambour de cylindre (5) ou est espacé par rapport à ce plan (figures 4 et 5).
  7. Machine à pistons axiaux selon l'une quelconque des revendications précédentes 1 à 6,
    caractérisée en ce que la partie de support (31) est un composant séparé qui est fixé à l'intérieur sur la paroi périphérique (2a) du boítier (2).
  8. Machine à pistons axiaux selon la revendication 7,
    caractérisée en ce que la paroi périphérique (2a) présente radialement vers l'extérieur une surface de positionnement (33a) radiale pour le positionnement de la partie support (31) en direction du dispositif de recul (15) et de préférence également une surface de positionnement (33b) axiale pour le positionnement de la partie support (31).
  9. Machine à pistons axiaux selon la revendication 7 ou 8,
    caractérisée en ce que la partie support (31) est vissée par une vis (32) avec la paroi périphérique (2a), la vis (32) étant vissée de préférence par l'extérieur.
  10. Machine à pistons axiaux selon l'une quelconque des revendications précédentes 1 à 9,
    caractérisée en ce que la partie support (31) est formée en forme d'angle avec une branche de butée (31a) s'étendant radialement vers l'intérieur et une branche de fixation (31b) s'étendant à peu près parallèlement à l'axe.
  11. Machine à pistons axiaux selon l'une quelconque des revendications précédentes 7 à 10,
    caractérisée en ce que la partie support (3 1 ) est logée dans un évidement (33c) s'étendant parallèlement à l'axe dans la paroi périphérique (2a), l'évidement (33c) présentant de préférence une forme de section en forme de partie de cercle et la partie support (31) étant disposée dans l'évidement (33c) avec un arrondi approprié en forme de partie de cercle.
EP99100023A 1998-01-09 1999-01-04 Machine à pistons axiaux avec support Expired - Lifetime EP0928895B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19800631 1998-01-09
DE19800631A DE19800631A1 (de) 1998-01-09 1998-01-09 Axialkolbenmaschine mit Stützteil

Publications (3)

Publication Number Publication Date
EP0928895A2 EP0928895A2 (fr) 1999-07-14
EP0928895A3 EP0928895A3 (fr) 2001-03-28
EP0928895B1 true EP0928895B1 (fr) 2004-07-14

Family

ID=7854267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100023A Expired - Lifetime EP0928895B1 (fr) 1998-01-09 1999-01-04 Machine à pistons axiaux avec support

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EP (1) EP0928895B1 (fr)
DE (2) DE19800631A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947321A1 (de) * 1999-10-01 2001-04-19 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine mit einer Rückzugeinrichtung
DE10035630C1 (de) 2000-07-21 2002-03-14 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine mit einer Rückzugeinrichtung
DE10312242B3 (de) * 2003-03-19 2004-12-02 Brueninghaus Hydromatik Gmbh Druckstift und Axialkolbenmaschinen mit diesem Druckstift
DE102007030708A1 (de) * 2007-07-02 2009-01-08 Robert Bosch Gmbh Axialkolbenmaschine mit Drosselnut

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587403A (en) * 1970-01-16 1971-06-28 Sperry Rand Corp Power transmission
US3605565A (en) * 1970-03-13 1971-09-20 Sperry Rand Corp Power transmission
US4443160A (en) * 1980-11-13 1984-04-17 Brueninghaus Hydraulik Gmbh High-pressure piston pump for liquids, preferably for water
DE3212402A1 (de) * 1982-04-02 1983-10-13 Abex Corp., 10036 New York, N.Y. Hydraulische axialkolbenmaschine
US4455920A (en) * 1982-06-01 1984-06-26 Abex Corporation Rocker cam control
DE3901064A1 (de) * 1988-01-16 1989-07-27 Michael Meyerle Hydrostatische axialkolbenmaschine, insbesondere fuer ein kraftfahrzeuggetriebe mit leistungsverzweigung

Also Published As

Publication number Publication date
DE59909922D1 (de) 2004-08-19
EP0928895A2 (fr) 1999-07-14
EP0928895A3 (fr) 2001-03-28
DE19800631A1 (de) 1999-07-15

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