WO2007059866A1 - Moteur a pistons axiaux - Google Patents

Moteur a pistons axiaux Download PDF

Info

Publication number
WO2007059866A1
WO2007059866A1 PCT/EP2006/010794 EP2006010794W WO2007059866A1 WO 2007059866 A1 WO2007059866 A1 WO 2007059866A1 EP 2006010794 W EP2006010794 W EP 2006010794W WO 2007059866 A1 WO2007059866 A1 WO 2007059866A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
axial piston
piston machine
machine according
drum
Prior art date
Application number
PCT/EP2006/010794
Other languages
German (de)
English (en)
Inventor
Jörg Dantlgraber
Original Assignee
Bosch Rexroth Ag
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 Bosch Rexroth Ag filed Critical Bosch Rexroth Ag
Publication of WO2007059866A1 publication Critical patent/WO2007059866A1/fr

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
    • F04B1/2092—Means for connecting rotating cylinder barrels and rotating inclined swash plates
    • 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
    • F04B1/2035—Cylinder barrels
    • 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
    • F04B1/22—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 having two or more sets of cylinders or pistons
    • F04B1/24—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 having two or more sets of cylinders or pistons inclined to the main shaft axis

Definitions

  • the invention relates to an axial piston machine according to the preamble of patent claim 1.
  • the Applicant has two approximately in the axial direction opposite to each other directed rows of pistons, which are in operative connection with one of a swash plate frontally supported cylinder drum.
  • the piston rows each have a plurality of pistons which are each guided in a cylinder sleeve of the cylinder drums.
  • the pistons are connected to a shaft which acts as a drive or driven shaft depending on the design of the axial piston machine.
  • the joints each have a hinge pin which is inserted into an opening of the cylinder drums and has a crowned head with which it dips into the respective cylinder sleeve, wherein at its crowned head a voltage applied to an inner circumferential wall of the cylinder sleeve seal is formed. Furthermore, each cylinder sleeve on a spherical foot-side support ring surface, with which it is supported on the front side of the cylinder drum.
  • a disadvantage of this solution is that the formation of the hinge pin and the formation of the spherical support ring surfaces of the cylinder sleeves requires a high manufacturing effort.
  • the present invention seeks to provide an axial piston machine that allows a compensation of transversal movements with minimal manufacturing effort. This object is achieved by an axial piston machine having the features of patent claim 1.
  • An axial piston machine has at least one swash plate on which a cylinder drum is supported.
  • the cylinder drum has a plurality of pivotally mounted cylinder sleeves which are supported on an end face of a drum base of the cylinder drum and in which pistons are guided, which are in operative connection with a shaft and its axis of rotation is employed to the axis of rotation of the cylinder drum.
  • the spherical protrusions partially dip into the cylinder sleeves. It is advantageous if the cylinder sleeves are spaced from the end face, so that the cylinder sleeves do not accumulate in a transverse movement on this surface.
  • the cylinder sleeves are supported in particular sealingly on an inner peripheral edge on the spherical projections.
  • the cylinder sleeves are biased against the spherical projections, so that can be dispensed with additional sealing elements between the cylinder sleeves and the spherical projections.
  • the convex projections bound at least in sections with their surfaces cylinder chambers of the cylinder sleeves.
  • the spherical protrusions can each have a bore open towards the cylinder space, which opens into an opening of the drum base, which can be brought into coincidence with the swash plates being steered.
  • the spherical protrusions may be formed integrally with the drum base, or used in receptacles of the cylinder drums, in particular pressed-in, ball head elements.
  • the pistons may each have a piston chamber which is open towards the cylinder chamber, so that the pistons can radially expand during a compression stroke.
  • the piston chambers can each be used for compression or Torvolumensreduzi für an insert that allows a radial expansion of the piston at a compression stroke of the piston.
  • Figure 1 shows a longitudinal section through an embodiment of the axial piston machine according to the invention
  • FIG. 2 shows a detailed representation of the embodiment from FIG. 1.
  • Figure 1 shows a longitudinal section through an axial piston machine 2 according to the invention, which can be operated both as a hydraulic motor and as a pump.
  • the axial piston machine 2 has a housing indicated by dashed lines 4, on which a suction port, not shown, and a pressure port, not shown, are formed.
  • the housing 4 is designed in several parts and has two covers 6, 8, between which a dashed line indicated, sleeve-like central part 10 is clamped to the boundary of an inner space 12.
  • the inner space 12 is penetrated by a drive shaft 14, which is mounted in the housing 4 via a roller bearing 16, which is inserted into an inner bore 18 of the lid 6, and by a rolling bearing 20, which is located in an inner bore 22 of the lid 8 ,
  • a protruding from the housing 4 free end portion of the drive shaft 14 is connectable to a drive motor, not shown.
  • two swash plates 24, 26, each with an obliquely to the shaft axis W of the drive shaft 14 extending support surface 28, 30 are on the lids 6, 8 rotatably or adjustably arranged.
  • On the support surfaces 28, 30 each mounted on the drive shaft 14 cylinder drum 32, 34 is supported.
  • the cylinder drums 32, 34 each have a plurality of cylinder sleeves 36, 38, in each of which a piston 40, 42 of a piston series is immersed, which are frontally formed on a radially projecting drive flange 44 of the drive shaft 14.
  • the swash plates 24, 26 are arranged symmetrically to the vertical plane in Figure 1 center plane M, wherein the support surfaces 28, 30 are each inclined to the center plane M.
  • the cylinder drums 32, 34 are pivotally mounted on the drive shaft 14, so that due to their inclination during a rotation of the drive shaft 14, a wobbling motion is effected.
  • the cylinder drums 32, 34 in each case via two on a shell portion 46, 48 of the cylinder drums 32, 34 engaging driving pins 50, 51 and 52, 53 taken in the direction of rotation, each in a spherical bearing section 54, 56 of the drive shaft 14 passing through transverse bore 58, 60 are used in sections.
  • the cylinder drums 32, 34 are each supported via a drum base 62, 63 on the respective support surface 28, 30, wherein they by means of a tension spring 64, 65, between each one on the bearing portion 54, 56 pivotable support ring 66, 67 and a extends in an inner circumferential groove 68, 69 of the drum base 62, 63 recorded locking ring 70, 71, are biased against the respective support surface 28, 30. Further details of the axial piston machine 2 will be explained with reference to the detailed illustration of the cylinder drum 34 in FIG.
  • the cylinder sleeves 36, 38 each have a cylinder bore 72, in each of which a piston 40, 42 is immersed and the foot side is radially stepped back, so that a radially inwardly extending shoulder 74 is formed.
  • the cylinder sleeves 36, 38 are each pivotally mounted on an annular end face 76 of the drum base 62, 63 facing away from the support surface 28, 30, each supported with an inner peripheral edge 78 of the shoulder 74 on a surface 80 of a spherical projection 82, which is supported on the Ring end face 76 is formed.
  • the cylinder sleeves 36, 38 are connected via a spring 83, which is located on the drive flange 44th supports and frontally engages them, biased against the spherical projections 82 and supported thereon so that they are spaced from the annular end face 76, so that the cylinder sleeves 36, 38 do not accumulate in a transverse movement on the annular face 76 and the spherical projections 82nd be lifted off.
  • a spring 83 which is located on the drive flange 44th supports and frontally engages them, biased against the spherical projections 82 and supported thereon so that they are spaced from the annular end face 76, so that the cylinder sleeves 36, 38 do not accumulate in a transverse movement on the annular face 76 and the spherical projections 82nd be lifted off.
  • the convex projections 82 at least partially submerge in the cylinder bore 72 of the cylinder sleeves 36, 38 and limit each with its surface 80 a cylinder space 73. They can, as shown, integrally formed as a dome-like elevations of the drum base 62, 63 or, for example as Ball head elements, which are inserted into corresponding receptacles of the drum base 62, 63, in particular pressed, are.
  • the spherical protrusions 82 are each penetrated by a hole 84 open towards the cylinder chamber 73, which opens into an opening of the drum base 62, so that, as shown, the bore 84 appears to be extended by the drum base 62 and each with not shown control kidneys 28, 30 can be brought into overlap, so that in dependence on the rotational position (inner, outer dead center) of the cylinder drum 36, 38, a connection with the suction or the pressure port is made to nachzusaugen pressure medium in the cylinder chamber 73 or pressurized high pressure fluid to to guide a consumer.
  • the pistons 40, 42 have a substantially conical shape and each form opposite end portions of a double piston 86, which is screwed with a central portion 88 in a female threaded through hole 90 of the drive flange 44.
  • the depth of engagement of the central portion 88 is limited by a radial shoulder 92 of the double piston 86, which rests in the end position with a shoulder surface 94 on the front side of the drive flange 44.
  • the pistons 40, 42 each have a shaft 96 extending from the central portion 88, which merges into a tapered piston head 98 which dips into the cylinder bore 72 and sealingly abuts against an inner peripheral wall 100 of the cylinder sleeve 36, 38, so that over the spherical projection 82, the piston head 98 and the inner peripheral wall 100 of the cylinder chamber 73 is limited.
  • a kelchartiger to the cylinder space 73 toward the open piston chamber 102 is formed at the front, which merges into a provided with an internal thread 104 blind bore 106 and allows that the inner peripheral wall 100 of the piston head 98 can be acted upon by a compression stroke at high pressure, so that the piston head 98 can geometrically adapt to the cylinder sleeve 36, 38 radially expanding during a compression stroke of the piston 40, 42 and thus sealingly abuts the inner circumferential wall 100 of the cylinder sleeves 36, 38 in each working position.
  • an insert 108 can be inserted into the piston chamber 102 which is secured by a screw 110 passing through it and being in operative engagement with the internal thread 104.
  • the insert 108 has a gap, so that even when used in the piston chamber 102 insert 108 during a compression stroke of the piston head 98 can radially expand to prevent leakage.
  • the insert 108 and the screw 110 may protrude beyond the piston head 98, as shown, but a collision of the insert 108 or the screw 110 with the inner circumferential wall 100 of the cylinder sleeve 36, 38 or the surface 80 of the spherical projection 82 is not he follows.
  • an axial piston machine with at least one swash plate, on which a cylinder drum is supported, which has a plurality of pivotally mounted cylinder sleeves in which pistons are sealingly guided, which are operatively connected to a shaft, the cylinder sleeves each foot on spherical projections of an end face of the cylinder drum are supported.

Landscapes

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

Abstract

L'invention concerne un moteur à pistons axiaux comprenant au moins un plateau-came sur lequel est supporté un tambour cylindrique présentant plusieurs manchons cylindriques pivotants, dans lesquels sont guidés hermétiquement des pistons en liaison fonctionnelle avec un arbre, les manchons cylindriques étant à chaque fois supportés à la base sur des saillies bombées d'une face frontale du tambour cylindrique.
PCT/EP2006/010794 2005-11-25 2006-11-10 Moteur a pistons axiaux WO2007059866A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102005056631.6 2005-11-25
DE102005056631 2005-11-25
DE102006003122.9 2006-01-23
DE102006003122A DE102006003122A1 (de) 2005-11-25 2006-01-23 Axialkolbenmaschine

Publications (1)

Publication Number Publication Date
WO2007059866A1 true WO2007059866A1 (fr) 2007-05-31

Family

ID=37562164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/010794 WO2007059866A1 (fr) 2005-11-25 2006-11-10 Moteur a pistons axiaux

Country Status (2)

Country Link
DE (1) DE102006003122A1 (fr)
WO (1) WO2007059866A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1034218C (nl) * 2006-09-26 2010-03-16 Bosch Gmbh Robert Axiale zuigermachine.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007001795A1 (de) 2007-01-05 2008-07-10 Robert Bosch Gmbh Kolbenmaschine
DE102010052067A1 (de) * 2010-11-19 2012-05-24 Robert Bosch Gmbh Hydraulische Kolbenmaschine
DE102019205824A1 (de) * 2019-04-24 2020-10-29 Zf Friedrichshafen Ag Pumpe, insbesondere Ölpumpe für ein Getriebe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742819A (en) * 1970-02-20 1973-07-03 New Inuent Sa Telescopic piston-cylinder assembly for hydraulic machines and machine components
WO2003058035A1 (fr) * 2002-01-12 2003-07-17 Innas B.V. Dispositif hydraulique
WO2004055369A1 (fr) * 2002-12-18 2004-07-01 Bosch Rexroth Ag Machine a piston axiaux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742819A (en) * 1970-02-20 1973-07-03 New Inuent Sa Telescopic piston-cylinder assembly for hydraulic machines and machine components
WO2003058035A1 (fr) * 2002-01-12 2003-07-17 Innas B.V. Dispositif hydraulique
WO2004055369A1 (fr) * 2002-12-18 2004-07-01 Bosch Rexroth Ag Machine a piston axiaux

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1034218C (nl) * 2006-09-26 2010-03-16 Bosch Gmbh Robert Axiale zuigermachine.

Also Published As

Publication number Publication date
DE102006003122A1 (de) 2007-05-31

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