EP3023637B1 - Fluid-säulen-hydraulikmotor mit vereinfachten mitteln zum halten der antriebselemente gegen zugehörige gleitflächen - Google Patents

Fluid-säulen-hydraulikmotor mit vereinfachten mitteln zum halten der antriebselemente gegen zugehörige gleitflächen Download PDF

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Publication number
EP3023637B1
EP3023637B1 EP15193044.3A EP15193044A EP3023637B1 EP 3023637 B1 EP3023637 B1 EP 3023637B1 EP 15193044 A EP15193044 A EP 15193044A EP 3023637 B1 EP3023637 B1 EP 3023637B1
Authority
EP
European Patent Office
Prior art keywords
piston
propulsion members
cover
motor
head
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
EP15193044.3A
Other languages
English (en)
French (fr)
Other versions
EP3023637A1 (de
Inventor
Loris De Leonardis
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.)
Parker Hannifin Manufacturing SRL
Original Assignee
Parker Hannifin Manufacturing SRL
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Publication date
Application filed by Parker Hannifin Manufacturing SRL filed Critical Parker Hannifin Manufacturing SRL
Publication of EP3023637A1 publication Critical patent/EP3023637A1/de
Application granted granted Critical
Publication of EP3023637B1 publication Critical patent/EP3023637B1/de
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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/113—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0406—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0415—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/053—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the inner ends of the cylinders
    • 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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0408—Pistons
    • 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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders

Definitions

  • the present invention relates to a hydraulic motor provided with improved means for retaining the propulsion members against associated sliding surfaces.
  • Said propulsion members may be arranged radially, axially or inclined.
  • the drawback is the same for radial and/or axial and/or inclined motors that use telescopic propulsion elements .
  • the technical problem which is posed therefore is that of providing a fluid-column hydraulic motor, in particular, but not necessarily of the radial type, which has simplified means for retaining the external cylinder of the propulsion members against respective surfaces with which they must make contact in a sealingly stable manner.
  • the hydraulic motor in the version with radial propulsion members comprises a casing 1 having, housed inside it, the shaft 2 mounted on bearings and carrying the eccentric cam 3 against which a plurality of propulsion members 10 act.
  • Each propulsion member 10 is contained externally inside the casing 1 by a respective cover 4 which is fastened to the casing 1 by respective fixing means which are preferably inserted in the radial direction.
  • Said propulsion members 10 are in turn formed by an external cylinder 11, one of the two end edges of which bears against the outer surface 3a of the said eccentric cam 3, and by a piston 12 telescopically slidable in a radial direction inside the cylinder 11 and having one of its two end edges in bearing contact against a respective sliding surface 4b of the cover 4.
  • the contact edge of said cylinder 11 and said piston 12 resting on the respective sliding surface 4b of the cover 4 and sliding surface 3a of the eccentric cam 3 is substantially formed by a respective annular edge 11a, 12c having a contact surface 11b, 12b parallel to the surface of the eccentric cam.
  • said retaining elements consist of: a coaxial shoe 13 having a diameter slightly greater than the external diameter of the cylinder 11 so as to allow the passage thereof as far as an end-of-travel stop consisting of a tooth 11c extending outwards and able to engage with the means for performing retaining in the radial direction described below.
  • Said shoe 13 has, moreover, at least one pair of opposite and parallel undercuts with a cylindrical surface designed to form an engaging element for a ring 15 ( Figs. 1 and 2 ) arranged around each edge 13c of all the shoes 13 for retaining each cylinder 11 and having its centre on an axis parallel to that of the drive shaft 2 and passing through the centre of the spherical cam 3.
  • the sliding surface 4b of the cover 4 has a convex spherical shape and correspondingly the contact surface of the piston 12 is shaped as a corresponding concave spherical surface 12b.
  • the relative retaining elements are formed by a pin 52 provided with a head 53 which has a spherical surface 53a resting on corresponding support elements 54 which are fixed to the casing 1 so that the head 53 itself forms a ball joint; the shank 52a of the pin 52 supports a cylindrical body 55 having a diameter such that its side surface 55a makes contact with the inner side surface of the piston 12 and its radially outer front surface 55b is arranged underneath an annular tooth 12c of the cylinder 12 projecting towards the inside thereof.
  • Resilient means in the form of a spring 16 are arranged between the cylindrical body 55 and the said annular tooth 12c so as to ensure constant relative contact between the sliding surfaces 12b, 1a during the various working phases of the propulsion member 10; the piston 12 also carries an end-of-travel element 50 for preventing the spring 16 from being stressed beyond its yield point.
  • said means for retaining the piston 12 against the sliding surface are composed of an anchoring pin formed as one piece and having:
  • cover 104 of the motor has ( Fig. 4 ) :
  • the third connecting seat 106 allows the head 101 of the retaining pin 100 to pass from the first radially inner seat 105a to the second radially outer seat 105b, inside which the head remains trapped.
  • An internal spring 13 for pushing the associated ends against the corresponding sliding surfaces is arranged between the opposite ends of the piston 12 and the cylinder 11.
  • the motor according to the invention results in a significant reduction in the parts required for operation thereof and also in a substantial simplification of the machining operations which must be carried out on the single parts and the assembly operations; the formation of the convex and concave spherical surfaces on the respective covers and projections of the casing, piston and cover may in fact be easily realized during production of the two components and does not require additional machining and/or handling during assembly of the motor.
  • the solution according to the present invention may also be applied to motors which are of the axial type (i.e axial telescopic propulsion members) and/or have inclined telescopic propulsion members.
  • the scope of the present invention also includes the equivalent configuration of the propulsion member with an [inner cylinder and] outer piston inside which an inner cylinder is telescopically slidable, each element abutting the relative surfaces of the eccentric cam or of the motor's cover.

Claims (5)

  1. Fluid-Säulen-Hydraulik-Motor umfassend, ein Gehäuse (1), welches innenliegend die Antriebswelle (2) lagert, welche mit einem Exzenternocken (3) versehen ist, gegen welche eine Vielzahl von Antriebsteilen (10) wirkt, wobei die genannten Antriebsteile innerhalb des Gehäuses (1) mittels einer entsprechenden Abdeckung (104) verschlossen sind, welche mittels einer entsprechenden Befestigungseinrichtung am Gehäuse (1) befestigt ist, wobei jedes Antriebsteil (10) umfassend: einen äußeren Zylinder (11), dessen eine der beiden Endkanten (11a) auf der Außenfläche (3a) des genannten exzentrischen Nockens (3) ruht, und einen teleskopartig in einer radialen oder axialen oder geneigten Gleitrichtung innerhalb des Zylinders (11) gleitenden Kolben (12), dessen eine der beiden Endkanten einen Lagerkontakt gegen eine entsprechende Gleitfläche (104b) der Abdeckung (104) bildet; Mittel zum abdichtenden Halten des Kolbens (12) gegen die Gleitfläche (104b) der Abdeckung (104),
    dadurch gekennzeichnet, dass
    die genannten Haltemittel einen Verankerungsstift (100) umfassen, der einstückig ausgebildet und versehen ist mit:
    - einem Kopf (101) zum Zusammenwirken mit der Abdeckung (104) des Motors;
    - einem Schaft (102) mit einem Durchmesser, der kleiner ist als der des Kopfes;
    - einer inneren Scheibe (103) mit einem Außendurchmesser, der kleiner ist als der Innendurchmesser des Kolbens (12) und dazu bestimmt ist, axialen Kontakt gegen eine nach innen vorstehende ringförmige Kante (12a) herzustellen, die an dem radial äußeren Ende des genannten Kolbens (12) gebildet ist,
    und dadurch, dass
    die Abdeckung (104) des Motors entsprechend aufweist:
    - einen inneren verschlossenen Hohlraum (105) umfassend einen ersten inneren Sitz (105a) mit geeignetem Durchmesser, der ausgebildet ist den Kopf (101) des Stifts (100) in der Gleitrichtung aufzunehmen;
    - einen zweiten äußeren Sitz (105b) mit einer inneren Einschnürung (105c), die dazu ausgebildet ist, den Kopf (101) aufzunehmen und zu verhindern, dass er in Gleitrichtung austritt;
    - einen dritten Sitz (106), der den ersten inneren Sitz (105a) und den zweiten äußeren Sitz (105b) miteinander verbindet.
  2. Motor nach Anspruch 1, dadurch gekennzeichnet, dass eine innere Feder (13), bereitstellend einen Druck gegen die entsprechenden Gleitoberflächen (104b, 3a), zwischen den gegenüberliegenden Enden des Kolbens (12) und des Zylinders (11) angeordnet ist.
  3. Motor nach Anspruch 1, dadurch gekennzeichnet, dass er von der Bauart mit radialen Antriebsteilen ist.
  4. Motor nach Anspruch 1, dadurch gekennzeichnet, dass er von der Bauart mit axialen Antriebsteilen ist.
  5. Motor nach Anspruch 1, dadurch gekennzeichnet, dass er von der Bauart mit geneigten Antriebsteilen ist.
EP15193044.3A 2014-11-07 2015-11-04 Fluid-säulen-hydraulikmotor mit vereinfachten mitteln zum halten der antriebselemente gegen zugehörige gleitflächen Active EP3023637B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2014U000342U ITMI20140342U1 (it) 2014-11-07 2014-11-07 Motore idraulico con mezzi semplificati di trattenuta del pistone dei propulsori contro rispettive superfici di strisciamento

Publications (2)

Publication Number Publication Date
EP3023637A1 EP3023637A1 (de) 2016-05-25
EP3023637B1 true EP3023637B1 (de) 2018-06-06

Family

ID=54541965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15193044.3A Active EP3023637B1 (de) 2014-11-07 2015-11-04 Fluid-säulen-hydraulikmotor mit vereinfachten mitteln zum halten der antriebselemente gegen zugehörige gleitflächen

Country Status (2)

Country Link
EP (1) EP3023637B1 (de)
IT (1) ITMI20140342U1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL100828C (de) * 1960-06-14
US3726188A (en) * 1971-03-16 1973-04-10 Siebelt C Guntner Fluid-operated engine
IT1213481B (it) * 1986-08-11 1989-12-20 Riva Calzoni Spa Motore idraulico a propulsori radiali ad elementi tubolari a passaggio completo.
EP0851119B1 (de) 1996-12-23 2004-10-13 PARKER CALZONI S.r.l. Hydraulikmotor mit radial angeordneten, rohrförmigen Antriebselementen
ITMI20041219A1 (it) 2004-06-16 2004-09-16 Riva Calzoni Oleodinamica Spa Motore idraulico ad organi propulsori telescopici trattenuti a tenuta contro relative superfici di strisciamento da mezzi elastici interni

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
ITMI20140342U1 (it) 2016-05-07
EP3023637A1 (de) 2016-05-25

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