EP2104786B1 - Machine à pistons axiaux comportant un logement pourvu d'une section d'espace interne à extension radiale - Google Patents

Machine à pistons axiaux comportant un logement pourvu d'une section d'espace interne à extension radiale Download PDF

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Publication number
EP2104786B1
EP2104786B1 EP07857025A EP07857025A EP2104786B1 EP 2104786 B1 EP2104786 B1 EP 2104786B1 EP 07857025 A EP07857025 A EP 07857025A EP 07857025 A EP07857025 A EP 07857025A EP 2104786 B1 EP2104786 B1 EP 2104786B1
Authority
EP
European Patent Office
Prior art keywords
axial piston
housing
piston engine
engine according
elevation
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.)
Active
Application number
EP07857025A
Other languages
German (de)
English (en)
Other versions
EP2104786A2 (fr
Inventor
Gerhard Betz
Herbert Dreher
Clemens Krebs
Michael Dürr
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
Publication of EP2104786A2 publication Critical patent/EP2104786A2/fr
Application granted granted Critical
Publication of EP2104786B1 publication Critical patent/EP2104786B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B1/2064—Housings
    • 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
    • F04B1/141—Details or component parts
    • F04B1/145—Housings

Definitions

  • the invention relates to an axial piston machine according to the preamble of claim 1.
  • An axial piston machine of this type is generally state of the art, which may be of different types, e.g. Example, to a so-called swash plate machine or Schrägachsenmaschine, and which may be variable or unchangeable throughput volume each axial piston machines.
  • An axial piston machine with the features according to the preamble of claim 1 is for example from the patent application US 2001/0042437 A1 known.
  • the cylindrical cylinder in cross-section is arranged in a housing interior whose housing peripheral wall surrounds the cylinder block with a sufficient radial distance.
  • the interior is at least partially filled with the hydraulic medium, in particular hydraulic oil, the axial piston machine and that at a low pressure.
  • the peripheral wall of the housing surrounds the cylinder barrel with a sufficiently small radial distance. Since the cross-sectional shape of the cylinder drum is usually round, have common Housing a substantially round or hollow cylindrical cross-sectional shape.
  • axial piston variable flow rate it is known elongated and z.
  • the invention has for its object to improve an axial piston machine of the type specified above with respect to a space-saving form of their housing.
  • an at least space-favorable hydraulic connection point of the axial piston machine to a hydraulic circuit and / or to a leak connection to be achieved.
  • a space-favorable arrangement of parts of an adjusting device for changing the throughput volume of the axial piston machine is also desired.
  • the peripheral wall has at least one radial elevation which extends longitudinally in the longitudinal direction of the drive shaft and which is formed by two angular or U-shaped circumferential wall sections which delimit a radially widened interior section.
  • a radially expanded interior portion is created, which is the arrangement of additional parts of the axial piston machine available, for. B. dividing an adjusting device for reducing or increasing the flow rate of the axial piston machine, which are adjusting elements for Adjusting the throughput volume or may act to stop elements to limit an adjustment.
  • An axial piston machine in which a radial elevation with an angular or U-shaped cross section is arranged on the circumference of the transverse wall of the housing, in whose ridge region a hydraulic connection point with a connection opening is arranged.
  • This embodiment leads to a raised and thus from the surrounding area of the housing transversely spaced hydraulic connection point, which ensures not only a spatially favorable arrangement but also a handling-friendly assembly and disassembly of the associated hydraulic line due to the surrounding space.
  • This embodiment also makes it possible not only to arrange the hydraulic line radially, but also bent or angular bent form, z. B. at an acute angle of z. B. angled about 45 °.
  • a plurality of elevations may be arranged transversely opposite each other and / or offset on one side of the housing and / or in the circumferential direction, resulting in a polygonal or semi-circular or substantially quadrangular cross-sectional shape for the housing and correspondingly more radially expanded interior sections available are.
  • each case two, three or four elevations according to the invention are arranged offset in the circumferential direction, can be an adjusting device for adjusting and adjusting the flow rate of the axial piston machine and a limiting device of the maximum setting, z.
  • a swash plate realize in space-favorable manner.
  • axial piston machine has a housing 2, in whose interior 3 a swash plate 4 and a cylinder drum 5 are arranged axially adjacent to each other.
  • piston holes 6 are arranged distributed on a circumference, the z. B. extend parallel to the central axis 7 of the cylinder block 5 and the axial piston machine 1 and open at the side facing the swash plate 4 open.
  • cylindrical piston 9 are mounted longitudinally displaceable in cross-section, which limit work chambers 11 in the piston holes 6 in the direction of the swash plate 4 with their piston heads.
  • the swashplate 4 facing the foot ends of the piston 9 are each supported by a hinge 12 on the facing inclined surface 4a of the swash plate 4, wherein sliding shoes 13 may be present, between which and the foot ends preferably formed as ball joints with a ball head and a ball recess joints 12th are arranged.
  • the cylindrical drum 5 rests with its face facing away from the swash plate 4 on a control disk 14, at the at least two control openings 15a and 15b are arranged diametrically opposite each other, the longitudinal sections of an indicated supply line 16 and a discharge line 17 form, which by an adjacent housing Transverse wall 18a extend, on which the control disk 14 is held.
  • the cylinder drum 5 is arranged on a drive shaft 19 which is rotatable in the housing 2 is mounted and the axis of rotation 21 is coaxial with the central axis 7 of the cylinder drum 5.
  • the housing 2 is formed from a cup-shaped housing part 2a with a housing bottom 2b and a peripheral wall 2c and a lid-shaped flange 2d, which rests against the free edge of the peripheral wall 2c, which is thus screwed by a screw 22 with 22u screws 22a shown and which forms a front transverse wall 18b of the housing.
  • the drive shaft 19, which rotatably passes through the cylinder drum 5 in a bearing hole 5a is rotatably supported by means of suitable bearings 25, 25a on the housing bottom 2b and the front transverse wall 18b and the flange 2d, wherein the transverse wall 18b and the flange 2d in a Through hole 23 passes through axially, is sealed therein by a ring seal 24 and projects axially with a drive pin 19a from the housing 2.
  • the pot-shaped housing part 2a and the flange 2d are with flat contact surfaces 2f to each other, whereby a dividing joint 26 is formed between these components, which is sealed in a manner not shown, for. B. by a ring seal.
  • a centering 27 is preferably provided, for. B. in the form of a protruding from the associated contact surface 2 f projection which fits into a matching recess in the opposite contact surface 2 f or in the inner edge of the inner space 3.
  • the pivot joint 32 may be formed by a so-called pivoting cradle, with a circular arc-shaped concave surfaces 32b arranged transversely or two on both sides of the drive shaft 19 on the inside of the flange 2d and a circular arc-shaped convex on either side of the throughthrough hole 28 Articulated surfaces 32c on the swash plate 4.
  • the pivot joint 32 is a sliding bearing. But it can also be formed by a roller bearing or needle roller bearings, which can be realized with arranged between the joint surfaces 32b, 32c rolling elements in a small construction.
  • this also has at least one radial elevation 37, which is axially opposite the associated interior portion 36, so that the in Fig. 2 as directed against the survey 37 arrow or as a double arrow clarified adjustment mechanism 31a at the survey 37 in the sense of pressure and / or Switzerlandübung can attack.
  • each cavity section 36 axially arranged on the swash plate 4 a survey 37 are arranged, wherein in the presence of four elevations 37, the swash plate 4 may have a quadrangular or rectangular shape and the corners of the swash plate 4 may be rounded.
  • a pivot limiting device 41 can also be disposed in a space-saving manner for limiting the maximum and / or minimum pivot angle of the swashplate 4.
  • Fig. 2 and 4 show two pivot limiting devices 41, one of which is provided for the maximum and the other for the minimum pivoting angle position.
  • the at least one pivot limiting device 41 may, for. Example, be formed by a stop screw 41a, which is screwed into a thread of an inner projection of the peripheral wall 2c, not shown, and in a respect to the pivot axis 33 transversely or obliquely directed distance against the swash plate 4 and the corresponding elevation 37 either screwed back and forth is, for. B. by means of an attacking on the head of the stop screw screwdriver.
  • the at least one elevation 34a, 34b, 34c and the at least one adjusting mechanism 31a or pivoting limiting device 41 can therefore be arranged axially between the longitudinal plane E1 containing the pivot axis 33 and a longitudinal center plane E2 perpendicular thereto.
  • the one or both pivoting limiting devices 41 can thus be arranged on both sides of the pivot axis 33 with respect to this transverse to each other or obliquely opposite.
  • the in Fig. 1 not shown other pivot limiting device 41 may be formed accessible from the outside, as has been described for the top right arranged pivot limiting device 41, z. B. be arranged in a mirror image with respect to the longitudinal plane E1 and the longitudinal plane E2.
  • the at least one elevation 34 a, 34 b is also space favorable for the arrangement of hydraulic functional elements, such.
  • B. at least one connection point 38 with a connection opening for the supply or discharge or flushing of the hydraulic medium, in particular hydraulic oil.
  • the connection opening 38a1, 38a2 and fasteners 39a are provided, the parts of a fastening device 39 for attaching connection fittings or connecting lines, for. B. the supply or discharge line 16, 17, or a leakage line.
  • connection opening 38a1 or 38a2 is formed by a hole passing through the peripheral wall 2c or the housing bottom 2b in the ridge 34d, wherein the center axis 38b of the connection opening 38a1, 38a2 or the hole is located in the bisector of the peripheral wall sections 2e or lateral surface sections 34e
  • an obtuse angle W1 of about 135 ° or in the presence of an approximately 45 ° fitting includes an acute angle W2 of about 45 °.
  • the mounting surface 39b and / or the connection opening 38a1 is preferably located on or in a second elevation 42, which rises in the sense of an approach from the first elevation 34a, 34b.
  • a second connection opening 38a1 or 38a2 may be arranged in the region of one of the other circumferentially offset elevations 34a, 34b, e.g. B. in the diametrically opposite elevation 34 a, 34 b, as it Fig. 4 shows.
  • connection fitting 38c may have a connection element 38d for an associated line whose central axis 38e extends parallel to the contact surface 39b or parallel to the abutting contact surface of the connection fitting 38c and with the central axis 38b is an approximately right Includes angle.
  • the central axis 38e of the connection fitting 38c with the adjacent side wall portion 2g includes the acute angle W2 of about 45 °.
  • connection fitting 38c may be integrally connected to the elevation 34a, 34b.
  • a second indicated screw 52 is provided, which distributes several distributed on the circumference, for. B. in the elevations 34c, arranged screw holes 52a in the flange 2d, for screws, not shown, which are inserted therein and screwed into threaded holes, not shown, of the carrier.
  • the screw holes 52a may be formed by circumferentially open slots.

Claims (10)

  1. Machine hydrostatique (1) à pistons axiaux, comprenant
    - un carter (2) qui, avec deux parois transversales (18a, 18b) et une paroi périphérique (2c) qui relie celles-ci longitudinalement, entoure et enferme une chambre intérieure (3),
    - un arbre moteur (19) qui s'étend longitudinalement dans le carter (2) et est monté rotatif dans le carter (2), et
    - un plateau incliné (4), qui est monté longitudinalement à côté du tambour ou barillet à cylindres (5) dans le carter (2), et sur lequel s'appuient, de manière articulée, des pistons (9) montés en coulissement alternatif dans des alésages à pistons (6) s'étendant environ longitudinalement dans le tambour à cylindres (5),
    la paroi périphérique (2c) présentant au moins un secteur radialement en relief (34a), qui est d'une configuration allongée dans la direction longitudinale du carter (2), et est formé par deux tronçons de paroi périphérique (2e) agencés en forme de cornière ou en forme de U et délimitant un tronçon de chambre intérieure (36) élargi radialement,
    caractérisée
    en ce que sur la zone de sommet ou de faîte (34d) du secteur en relief (34a ; 34b) est agencée ou respectivement sont agencés un ou des points de raccord de branchement hydraulique (38) avec une ouverture de raccord de branchement (38a1 ; 38a2).
  2. Machine hydrostatique à pistons axiaux selon la revendication 1,
    caractérisée
    en ce que le secteur en relief (34a) s'étend sur toute la longueur (L1) de la chambre intérieure (3).
  3. Machine hydrostatique à pistons axiaux selon la revendication 1 ou la revendication 2,
    caractérisée
    en ce que deux secteurs en relief (34a) sont agencés de manière mutuellement opposée l'un à l'autre, ou bien plusieurs, par exemple trois ou quatre, secteurs en relief (34a) sont agencés de manière décalée les uns par rapport aux autres dans la direction périphérique.
  4. Machine hydrostatique à pistons axiaux selon l'une des revendications précédentes,
    caractérisée
    en ce que le tambour à cylindres (5) s'appuie, avec son côté intérieur opposé à celui dirigé vers le plateau incliné (4), contre un plateau de commande (14) agencé entre une paroi transversale (18a) et le tambour à cylindres, et ledit au moins un secteur en relief (34a) s'étend longitudinalement également par-dessus la paroi transversale (18a) ou par-dessus les deux parois transversales (18a, 18b).
  5. Machine hydrostatique à pistons axiaux selon l'une des revendications précédentes,
    caractérisée
    en ce que le débit-volume de la machine à pistons axiaux (1) peut être sélectivement augmenté ou diminué à l'aide d'un dispositif de réglage (31) comprenant un mécanisme de réglage (31a), et en ce que de préférence le plateau incliné (4), en tant que partie du dispositif de réglage (31), est monté dans une articulation de pivotement (32) de manière à pouvoir pivoter autour d'un axe de pivotement (32a) orienté.
  6. Machine hydrostatique à pistons axiaux selon la revendication 5,
    caractérisée
    en ce que le mécanisme de réglage (31a) et/ou un dispositif de limitation de pivotement (41) est ou respectivement sont d'une configuration allongée, et s'étend ou respectivement s'étendent dans la direction longitudinale de la machine à pistons axiaux (1), dans le tronçon de chambre intérieure ou dans un des tronçons de chambre intérieure (36) élargis, en étant décalés transversalement par rapport à l'axe de pivotement (33).
  7. Machine hydrostatique à pistons axiaux selon l'une des revendications précédentes,
    caractérisée
    en ce qu'un ou deux secteurs en relief (34a, 34b, 34c) présentant un espacement réciproque orienté transversalement, sont agencés de manière transversalement décalée par rapport à l'axe de pivotement (33).
  8. Machine hydrostatique à pistons axiaux selon la revendication 6 ou la revendication 7,
    caractérisée
    en ce que sur les deux côtés de l'axe de pivotement (33), sont agencés deux secteurs radialement en relief (34a) présentant un espacement transversal l'un de l'autre et comprenant des tronçons de chambre intérieure (36) élargis, et en ce que, de préférence sur chaque côté de l'axe de pivotement (33), sont agencés un mécanisme de réglage (31a) et un dispositif de limitation de pivotement (41), en particulier agencés en étant mutuellement opposés en biais.
  9. Machine hydrostatique à pistons axiaux selon la revendication 4,
    caractérisée
    en ce que la paroi transversale (18a) est formée par la paroi de fond (2b) d'un carter (2a) en forme de pot.
  10. Machine hydrostatique à pistons axiaux selon l'une des revendications précédentes,
    caractérisée
    en ce que le carter (2) présente, au moins dans la zone dudit au moins un secteur en relief (34a, 34b, 34c), une forme de section transversale délimitée par quatre tronçons de paroi latérale (2g), notamment une forme de section transversale carrée ou rectangulaire, de préférence avec des coins arrondis.
EP07857025A 2006-12-29 2007-12-20 Machine à pistons axiaux comportant un logement pourvu d'une section d'espace interne à extension radiale Active EP2104786B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006062065A DE102006062065A1 (de) 2006-12-29 2006-12-29 Axialkolbenmaschine mit einem einen radial erweiterten Innenraumabschnitt aufweisenden Gehäuse
PCT/EP2007/011302 WO2008080573A2 (fr) 2006-12-29 2007-12-20 Machine à pistons axiaux comportant un logement pourvu d'une section d'espace interne à extension radiale

Publications (2)

Publication Number Publication Date
EP2104786A2 EP2104786A2 (fr) 2009-09-30
EP2104786B1 true EP2104786B1 (fr) 2010-10-13

Family

ID=39185893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07857025A Active EP2104786B1 (fr) 2006-12-29 2007-12-20 Machine à pistons axiaux comportant un logement pourvu d'une section d'espace interne à extension radiale

Country Status (7)

Country Link
US (1) US20100322789A1 (fr)
EP (1) EP2104786B1 (fr)
JP (1) JP5180970B2 (fr)
CN (1) CN101529092B (fr)
AT (1) ATE484675T1 (fr)
DE (2) DE102006062065A1 (fr)
WO (1) WO2008080573A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007022567A1 (de) 2007-05-14 2008-11-20 Robert Bosch Gmbh Axialkolbenmaschine
JP2013533418A (ja) 2010-06-23 2013-08-22 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング アキシャルピストン機械
DE102010045867A1 (de) 2010-09-17 2012-03-22 Robert Bosch Gmbh Axialkolbenmaschine
US11002259B2 (en) * 2018-12-05 2021-05-11 Hamilton Sundstrand Corporation Variable wobbler for a hydraulic unit
CN114198276B (zh) * 2021-12-13 2023-03-31 浙江工业大学 螺旋往复式液压活塞泵

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Also Published As

Publication number Publication date
WO2008080573A2 (fr) 2008-07-10
ATE484675T1 (de) 2010-10-15
JP5180970B2 (ja) 2013-04-10
US20100322789A1 (en) 2010-12-23
WO2008080573A3 (fr) 2008-08-28
DE502007005382D1 (de) 2010-11-25
CN101529092B (zh) 2012-02-15
EP2104786A2 (fr) 2009-09-30
JP2010514971A (ja) 2010-05-06
CN101529092A (zh) 2009-09-09
DE102006062065A1 (de) 2008-07-03

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