EP2104786A2 - 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

Info

Publication number
EP2104786A2
EP2104786A2 EP07857025A EP07857025A EP2104786A2 EP 2104786 A2 EP2104786 A2 EP 2104786A2 EP 07857025 A EP07857025 A EP 07857025A EP 07857025 A EP07857025 A EP 07857025A EP 2104786 A2 EP2104786 A2 EP 2104786A2
Authority
EP
European Patent Office
Prior art keywords
axial piston
housing
piston machine
machine according
hydrostatic axial
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
Application number
EP07857025A
Other languages
German (de)
English (en)
Other versions
EP2104786B1 (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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39185893&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2104786(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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

Links

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

  • Axialkolbenxnaschine with a radially expanded interior portion having housing
  • the invention relates to an axial piston machine according to the preamble of claim 1 or 6.
  • 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.
  • Cross-section round cylindrical drum is arranged in a housing interior, the 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.
  • the invention is based on the finding that a radial extension of the housing of the axial piston machine offers space-favorable arrangement and / or training possibilities both inside and outside.
  • the peripheral wall has at least one radial projection, which extends in the longitudinal direction of the drive shaft elongated, and which is formed by two angle or U-shaped peripheral wall portions which define a radially enlarged interior portion.
  • a radially expanded interior portion is created, which is the arrangement of additional parts of the axial piston machine available, for.
  • Circumferential wall sections in the region of the ridge of the radial elevation formed by them an advantageous arrangement point for fastening elements for attaching attachments of the axial piston machine, z. B. for direct or indirect attachment of
  • Example is that the ridge of the survey is raised with respect to both sides sloping side wall sections and therefore a space-saving or large space for mounting or dismounting of the respective attachment is present.
  • 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 area a hydraulic connection point is arranged with a connection opening.
  • this alternative of the invention leads to a raised and thus from the surrounding area of the housing transversely spaced hydraulic connection point, not only a spatially favorable arrangement but also a handling-friendly assembly and disassembly of the associated hydraulic because of the surrounding space Line guaranteed.
  • This embodiment of the invention 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. about 45 ° zuwinkein.
  • 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.
  • FIG. 1 shows an axial piston machine according to the invention in a schematic representation in axial section.
  • FIG. 2 shows a swashplate of the axial piston machine in its position of minimal throughput volume in perspective detail view
  • FIG. Fig. 3 shows an axial piston machine according to the invention in a perspective front view
  • Fig. 4 is a rear pot housing of the axial piston machine according to Fig. 1 or 3 in front view.
  • 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. parallel to the central axis 7 of the cylinder block 5 and the
  • Axialkolbenmaschine 1 extend and open at the side facing the swash plate 4 open.
  • piston 9 In the piston holes 6 preferably 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 one another, 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 made of a cup-shaped housing part 2a with a
  • 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
  • a ring seal 24 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.
  • Housing 2a together preferably a centering 27 is 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 axial piston machine 1 may be one with a constant or variable throughput volume. In the latter case, it has a in Fig. 1 by a double arrow clarified adjusting device 31, with which the throughput volume is selectively reduced or increased, with different known constructions can be used.
  • the swash plate 4 in a pivot joint 32 about a transverse to the axis of rotation 21 and longitudinal center axis directed pivot axis 32a by an adjustment mechanism 31a in one or the other pivot direction adjustable and detectable in the respective adjustment position.
  • the pivot joint 32 may be formed by a so-called pivoting cradle, with a transversely continuous or two arranged on both sides of the drive shaft 19 arcuate concave surfaces 32 b on the inside of the flange 2 d and a transversely continuous or two arranged on both sides of the feedthrough hole 28 arcuate convex articular 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.
  • the circumferential wall 2c of the housing 2 has a radial and in cross-section angular or U-shaped or roof-shaped elevation 34a, whose ridge 34d extends in the longitudinal direction of the tubular peripheral wall 2c.
  • the elevation 34a is formed by two angularly or U-shaped circumferential wall sections 2e, which rise tangentially or sekantially with respect to a conceivable hollow-cylindrical peripheral wall and are connected to each other in the ridge 34d of the elevation 34a.
  • the elevation 34a extends over the axial length Ll of the peripheral wall 2c or as a survey 34b over the thickness L2 of the rear transverse wall 18a of the pot housing 2a, wherein the flange 2d may preferably also have a corresponding elevation 34c, which may be approximately congruent with the elevation 34a in the axial projection and may extend across the thickness L3 of the front bulkhead 18b. It can thus be given an over the entire length L of the housing 2 extending survey 34, which is composed axially by the respective integrally formed elevations 34a, 34b, 34c, wherein the elevations 34a, 34b are also axially integrally connected to each other.
  • the elevation 34b is bounded by lateral surface portions 34e, which are arranged in an angular or U-shaped manner and enclose the elevation 34b between them. This also applies to the elevation 34c on the circumference of the flange 2d.
  • the elevation 34a bounded with its peripheral wall portions 2e with z. B. substantially the same thickness d a radially enlarged interior portion 36 which is suitable for space protected space protected for selective arrangement and yet to be described detail structures or components of the axial piston machine 1.
  • the peripheral wall 2c may have two surveys 34a or more arranged transversely opposite one another, e.g. B. three or four, in the circumferential direction, z. B. offset by about 90 °, arranged elevations have 34a.
  • the peripheral wall 2 c may have a substantially quadrangular or rectangular cross-sectional shape, wherein the corners may be rounded in the sense of round corners and between them extending side walls 2g - seen in cross section - may be slightly curved outwardly, as shown in FIGS. 3 and 4 show.
  • the side walls 2g may each be formed by the two peripheral wall sections 2e facing away from both elevations 34a adjacent to one another in the circumferential direction.
  • the circumferential portions 34e of the housing bottom 2b and of the flange 2d extending between the elevations 34b, 34c are also adapted to the shape and size of the side wall sections 2g of the peripheral wall 2c.
  • an adjusting device 31 associated adjusting mechanism 31a may be disposed in an interior portion 36, with respect to the cylinder barrel 5 space-wise outward or along the pivot axis 33 and thus be obliquely or diagonally offset.
  • this also has at least one radial elevation 37 which is axially opposite the associated interior portion 36, so that in Fig. 2 as directed against the survey 37 arrow or illustrated as a double arrow
  • 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.
  • the adjusting device 31 may have two axially oppositely acting adjusting mechanisms 31al, 31a2, which may be arranged on both sides of the pivot axis 33 at a radial distance and thereby with respect to the Pivot axis 33 can be arranged transversely or obliquely opposite each other. The latter can be taken from Fig. 2.
  • Such mutually oppositely effective adjustment mechanisms 31al, 31a2 can z.
  • Example be formed by a hydraulic Ausschwenkkolben and a hydraulic remindschwenkkolben, which can be effective axially in the same direction or in the same direction on the swash plate 4, wherein in the latter case one of the two pistons overruns the other piston.
  • At least one radially expanded interior portion 36 can be roomy also a
  • Swing limiting devices 41 one of which is provided for the maximum and the other for the minimum SchwenkwinkelStellung.
  • 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.
  • this or a hole or threaded hole receiving them in the peripheral wall 2 c may preferably extend obliquely outwards, so that the pivot limiting device 41 and the screw head is accessible from the outside.
  • Fig. 3 darg Benefici in which the top right arranged pivot limiting device 41 has a stop screw 41 a, which are arranged obliquely upwards and backwards in a corresponding oblique Hole or threaded hole extends to the outside and thus accessible from the outside. Accordingly, the other pivot limiting device 41 or stop screw 41a can be arranged accessible from the outside.
  • the at least one elevation 34a, 34b, 34c and the at least one adjusting mechanism 31a or swivel-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 other pivoting limiting device 41 not shown in Fig. 1 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 El or 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. 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.
  • connection opening 38al 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 openings 38al, 38a2 are arranged in the ridge 34d of the elevation 34a and / or 34b, namely in the longitudinal area L2 in which the rear transverse wall 18a or the housing base 2b is located and / or in the longitudinal area L1 of the Peripheral wall 2c.
  • the connection opening 38al or 38a2 is formed by a hole passing through the peripheral wall 2c or the housing bottom 2b in the ridge 34d, the center axis 38b of the connection opening 38al, 38a2 or the hole being in the bisecting line of FIG
  • Circumferential wall portions 2e or lateral surface portions 34e are located, for example, with one another.
  • obtuse angle Wl of about 135 ° or in the presence of an approximately 45 ° fitting includes an acute angle W2 of about 45 °.
  • the hole 38al forming the hole 38 shown in FIG. Left directly serve as a fastener for an associated hydraulic line, z. B. in the sense of a threaded connection, so that the hole itself is a fastener 39 a of the fastening device 39.
  • FIG. 3 on the right shows, as fastening elements 39a, a mounting surface 39b extending approximately at right angles to the center axis 38b and surrounding the connection opening 38a2 and two or more fastening holes 39c arranged opposite one another, preferably in the mounting surface 39b, the screw connection of a connection fitting for a hydraulic line serve, which can be attached to the mounting surface 39b and screwed by screws, not shown, to the peripheral wall 2c.
  • the attachment surface 39b and / or the connection opening 38al 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 38al or 38a2 may be arranged in the region of one of the other circumferentially offset elevations 34a, 34b, for. B. in the diametrically opposite elevation 34 a, 34 b, as shown in FIG. 4.
  • the connecting fitting 38c arranged at the connection point 38 on the top right can have a connection element 38d for an associated line, the central axis 38e of which extends parallel to the contact surface 39b or parallel to the abutment surface of the connection fitting 38c with the central axis 38b includes an approximately right 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.
  • connection points 38 for the hydraulic circuit it is thus also advantageous, independently of the above-described embodiment of the connection points 38 for the hydraulic circuit, to arrange a connection point 38 for a leakage line only in the at least one elevation 34a, this connection point being arranged in the longitudinal area L1 of the interior space 3.
  • peripheral wall sections 2e of the peripheral wall 2c also lead to a widening and improvement of an investment in the side wall sections forming it, in particular if at least one survey elevation 34a and / or 34b is not rounded but rectangular, as shown in FIG Fig. 4 show top left.
  • Such a peripheral wall section 2e is particularly suitable, when its outer surface is flat, as the mounting surface 45 for a drive device 46 for driving the adjustment mechanism 31a arranged in the associated interior section 36.
  • the drive unit 46 has Connections for an electrical and / or hydraulic supply.
  • the flange 2d is detachably connected by a screw 51 with a plurality of distributed circumferentially arranged screws 51a with the pot housing 2a, which pass through holes in the flange 2d and are screwed into threaded holes in the edge region of the peripheral wall 2c.
  • 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.
  • the flange 2d can also serve as an adapter for adapted attachment of the axial piston machine 1 to different carriers (eg from different manufacturers).
  • two flanges 2d are provided, the screw holes 51a are formed the same for a same hole pattern of a same screw 51, while the two flanges 2d screw holes 52a have different hole patterns, which are respectively adapted to the associated hole pattern of the respective carrier.
  • the invention is not limited to the described embodiment and is suitable for. B. also for axial piston machines in bent axis design. All described and / or drawn features can be combined with each other within the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne une machine hydrostatique à pistons axiaux (1), comprenant : un logement (2) dont deux parois transversales (18a, 18b) et une paroi périphérique (2c) reliant ces deux parois transversales dans le sens de la longueur entourent un espace interne (3); un arbre d'entraînement (19) qui s'étend dans le logement (2) dans le sens de la longueur et qui est monté de manière rotative dans ce logement (2); et un plateau oscillant (4) qui est monté longitudinalement dans le logement (2), à côté d'un tambour cylindrique (5) et sur lequel des pistons (9) sont en appui de manière articulée, ces pistons étant montés de manière à pouvoir effectuer un mouvement de va-et-vient dans des cavités de piston (6) s'étendant de manière sensiblement longitudinale. L'objectif de cette invention est d'améliorer la forme de ladite machine à pistons axiaux (1) de manière qu'elle soit avantageuse en termes d'espace. A cet effet, la paroi périphérique (2c) présente au moins une élévation radiale (34a) qui est ménagée dans le sens de la longueur dans la direction longitudinale du logement (2) et qui est formée de deux sections de paroi périphérique (2e) disposées en U ou selon un angle et délimitant une section d'espace interne à extension radiale (36).
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 true EP2104786A2 (fr) 2009-09-30
EP2104786B1 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)

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DE202024102373U1 (de) 2024-05-08 2024-05-17 Robert Bosch Gesellschaft mit beschränkter Haftung Axialkolbenmaschine mit gesonderter Vorkompressionsbaugruppe, welche zwei Unterräume umfasst

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Also Published As

Publication number Publication date
ATE484675T1 (de) 2010-10-15
DE502007005382D1 (de) 2010-11-25
CN101529092B (zh) 2012-02-15
WO2008080573A3 (fr) 2008-08-28
WO2008080573A2 (fr) 2008-07-10
US20100322789A1 (en) 2010-12-23
JP5180970B2 (ja) 2013-04-10
DE102006062065A1 (de) 2008-07-03
EP2104786B1 (fr) 2010-10-13
CN101529092A (zh) 2009-09-09
JP2010514971A (ja) 2010-05-06

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