EP1452733B1 - Pompe à pistons axiaux à disque oblique rotatif - Google Patents

Pompe à pistons axiaux à disque oblique rotatif Download PDF

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Publication number
EP1452733B1
EP1452733B1 EP04003510A EP04003510A EP1452733B1 EP 1452733 B1 EP1452733 B1 EP 1452733B1 EP 04003510 A EP04003510 A EP 04003510A EP 04003510 A EP04003510 A EP 04003510A EP 1452733 B1 EP1452733 B1 EP 1452733B1
Authority
EP
European Patent Office
Prior art keywords
swash plate
pump
axial piston
disk
rotation axis
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
EP04003510A
Other languages
German (de)
English (en)
Other versions
EP1452733A1 (fr
Inventor
Giancarlo Lanfredi
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.)
Lavorwash SpA
Original Assignee
Lavorwash SpA
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 Lavorwash SpA filed Critical Lavorwash SpA
Publication of EP1452733A1 publication Critical patent/EP1452733A1/fr
Application granted granted Critical
Publication of EP1452733B1 publication Critical patent/EP1452733B1/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
    • F04B1/14—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
    • F04B1/146—Swash plates; Actuating elements
    • 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
    • F04B1/128—Driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to a swash plate for axial piston pump.
  • the pump is constituted by a pump body in which the cylinder block is arranged so that it is aligned with the rotation axis of the oscillating swash plate.
  • the pistons are arranged inside the cylinder block and their external head is in contact with the thrust bearing of a roller bearing that is arranged on an annular surface portion that is inclined with respect to the rotation axis of the swash plate and is formed on the swash plate.
  • the pistons are associated with return springs for retracting outward the cylinder block.
  • the swash plate is provided centrally with a hub on which the rotation pivot of the swash plate is locked.
  • a crown gear is further locked on the pivot, substantially on the opposite side with respect to the swash plate, and meshes with a pinion that is functionally connected to the electric motor of the pump.
  • the coupling between the swash plate, the pivot and the crown gear is particularly difficult.
  • these components are made of metallic material (the swash plate is cast from a zinc-manganese-aluminum alloy and the crown gear is made of sintered steel) and their manufacturing costs are not negligible with respect to the total manufacturing cost of the entire pump.
  • US-A-3 643 433 discloses a swashplate pump with a pump body and an oscillating swash plate comprising a rotating disk-like body in which an annular seat is provided that is inclined with respect to the rotation axis of said disk-like body and on which there are accommodated sliding means for the heads of axial pistons, said pump being functionally connected to motor means, said swash plate comprising, monolithically with said disk-like body, a toothed circumferential portion that is coaxial to said rotation axis.
  • the aim of the present invention is to provide an oscillating swash plate for an axial piston pump that solves the problems described above in known types.
  • an object of the present invention is to provide an oscillating swash plate for an axial piston pump that reduces the concentricity errors produced in the coupling of the components of the pump and reduces the rotating masses.
  • Another object of the present invention is to provide an oscillating swash plate for an axial piston pump that can be manufactured at a lower cost than currently manufactured swash plates.
  • Another object of the present invention is to provide an oscillating swash plate for an axial piston pump that can be manufactured with known systems and technologies.
  • an axial piston pump of the swash plate type with an oscillating swash plate according to claim 1 is provided.
  • an oscillating swash plate for axial piston pumps is generally designated by the reference numeral 10.
  • the swash plate 10 is accommodated inside a pump body 11 and is of the inclined-plane type.
  • the swash plate 10 is formed by a rotating disk-like body 10a on which a central hub 12 is formed.
  • the central hub 12 has an axial through hole for coupling to a rotation pivot 13 that is pivoted to the pump body 11.
  • the disk-like body 10a has an annular seat 14 that is inclined with respect to the rotation axis 15 of said disk-like body and is formed on two different mutually parallel levels 14a and 14b.
  • the pistons 20 are inserted slidingly within a cylinder block 20a, which is fixed to the pump body 11 by way of brackets, and are associated with return springs 20b.
  • Said sliding means are constituted by a first thrust bearing 16 on which a roller cage 17 rests; in turn, a second thrust bearing 18 rests on the roller cage 17 and is directly in contact with the heads 19 of the pistons 20.
  • the swash plate 10 comprises, on the peripheral region of the disk-like body 10a, which is formed monolithically therewith, a toothed circumferential portion 21 that is coaxial to the rotation axis 15.
  • the toothed circumferential portion 21 mates kinematically with an actuation gear 22, for example a pinion, that is functionally connected to pump motor means 30, such as for example an electric motor, by way of a shaft 23.
  • actuation gear 22 for example a pinion
  • pump motor means 30 such as for example an electric motor
  • the swash plate 10 is made of plastics and is preferably injection-molded.
  • Figures 3 and 4 illustrate an embodiment of a swash plate (designated by the reference numeral 110) that can be used in a pump body that is different from the one described earlier.
  • the swash plate 110 comprises, on the peripheral region of a disk-like body 110a and formed monolithically therewith, a toothed circumferential portion 121 that is coaxial to a rotation axis 115.
  • This solution allows to eliminate the problems related to concentricity errors between the swash plate and the ring gear and to simplify production, eliminating the step for assembling said components (in addition to eliminating assembly costs).

Landscapes

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

Claims (2)

  1. Pompe à pistons axiaux du type à plateau oscillant avec un corps de pompe (11) et un plateau oscillant (10) comprenant un corps (10a) en forme de disque rotatif dans lequel une portée annulaire (14) est prévue qui est inclinée par rapport à l'axe de rotation (15) dudit corps (10a) en forme de disque et sur laquelle sont reçus des moyens de glissement (16, 17) pour les têtes (19) des pistons axiaux (20), ladite pompe (11) étant reliée fonctionnellement à des moyens moteurs (30), ledit plateau oscillant (10) comprenant, de façon monolithique avec ledit corps en forme de disque (10a), une portion circonférentielle dentée (21) qui est coaxiale audit axe de rotation (15), ladite portion circonférentielle dentée (21) étant accouplée cinématiquement à une roue dentée de commande (22) reliée auxdits moyens moteurs de ladite pompe, et un moyeu central (12) formé sur ledit corps (10a) en forme de disque qui est accouplé à un pivot de rotation (13) du corps de pompe (11).
  2. Pompe à pistons axiaux selon la revendication 1, caractérisé en ce que ledit plateau oscillant (10) est réalisé en matière plastique.
EP04003510A 2003-02-25 2004-02-17 Pompe à pistons axiaux à disque oblique rotatif Expired - Lifetime EP1452733B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD20030013 2003-02-25
IT000013U ITPD20030013U1 (it) 2003-02-25 2003-02-25 Piattello oscillante per pompa a pistoni assiali

Publications (2)

Publication Number Publication Date
EP1452733A1 EP1452733A1 (fr) 2004-09-01
EP1452733B1 true EP1452733B1 (fr) 2006-07-12

Family

ID=32800723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04003510A Expired - Lifetime EP1452733B1 (fr) 2003-02-25 2004-02-17 Pompe à pistons axiaux à disque oblique rotatif

Country Status (5)

Country Link
US (1) US20040165996A1 (fr)
EP (1) EP1452733B1 (fr)
AT (1) ATE333049T1 (fr)
DE (1) DE602004001469T2 (fr)
IT (1) ITPD20030013U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005041982A1 (de) * 2005-09-05 2007-03-08 Robert Bosch Gmbh Kolbenpumpe mit Taumelscheibenantrieb
DE202006005682U1 (de) * 2006-04-05 2006-06-14 Lincoln Gmbh & Co. Kg Schmiermittel- oder Hydraulikpumpe
US20100014998A1 (en) * 2008-07-21 2010-01-21 Michael Conner Diaphragm pump
CN107401491A (zh) * 2017-09-24 2017-11-28 英立（江苏）机电有限公司 一种石油钻井用泥浆泵
CN117386575A (zh) * 2023-06-05 2024-01-12 黄山市汇润机械有限公司 一种超高压大排量油泵

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB676612A (en) * 1946-05-03 1952-07-30 Electraulic Presses Ltd Improvements in and relating to hydraulic pumps and motors
CH510216A (de) * 1969-05-10 1971-07-15 Bosch Gmbh Robert Hydrostatisches Aggregat
DE9013630U1 (de) * 1990-09-28 1991-01-31 Speck-Kolbenpumpenfabrik Otto Speck GmbH & Co. KG, 8192 Geretsried Hochdruck-Flüssigkeitspumpe
CA2191967C (fr) * 1994-06-17 2000-03-21 Josef Schneider Appareil de nettoyage sous haute pression a isolation de securite

Also Published As

Publication number Publication date
US20040165996A1 (en) 2004-08-26
EP1452733A1 (fr) 2004-09-01
ATE333049T1 (de) 2006-08-15
ITPD20030013U1 (it) 2004-08-26
DE602004001469D1 (de) 2006-08-24
DE602004001469T2 (de) 2006-11-16

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