EP1948944B1 - Cylindre plongeur a double action et entrainement pour un dispositif de prehension - Google Patents

Cylindre plongeur a double action et entrainement pour un dispositif de prehension Download PDF

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Publication number
EP1948944B1
EP1948944B1 EP06776676A EP06776676A EP1948944B1 EP 1948944 B1 EP1948944 B1 EP 1948944B1 EP 06776676 A EP06776676 A EP 06776676A EP 06776676 A EP06776676 A EP 06776676A EP 1948944 B1 EP1948944 B1 EP 1948944B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
hydraulic oil
drive
accordance
distributor
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.)
Not-in-force
Application number
EP06776676A
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German (de)
English (en)
Other versions
EP1948944A1 (fr
Inventor
Rolf Mieger
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1948944A1 publication Critical patent/EP1948944A1/fr
Application granted granted Critical
Publication of EP1948944B1 publication Critical patent/EP1948944B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods

Definitions

  • the invention relates to a double-acting plunger cylinder and a drive for a gripper, are used in the double-acting plunger cylinder.
  • Such a device is eg in FR 2499123 disclosed.
  • hydraulic cylinders are used in a large number of variants.
  • double-acting plunger cylinders are used here, which are also referred to as plunger cylinders.
  • these double-acting plunger cylinders are connected via hydraulic hoses to a corresponding hydraulic source.
  • These hydraulic hoses prove to be weak points of the construction.
  • the hydraulic hoses age and must therefore be replaced after a certain period of operation.
  • the hydraulic hoses can not be completely protected against mechanical damage even with a suitable structural design.
  • very high demands are placed on the stability of the components due to the use in rough operation.
  • Object of the present invention is to provide a double-acting plunger cylinder and equipped with this drive for a gripper that can work trouble-free even in rough operation.
  • the double-acting plunger cylinder comprises a piston rod and a cylinder, wherein in the cylinder pressure chambers for receiving the hydraulic oil are formed and wherein two inputs are provided in a pressure chamber of the cylinder, which are supplied via a subsequent distributor with hydraulic oil.
  • One of the two inputs forms the connection to the immediately adjoining pressure chamber.
  • the second input forms the connection to the pressure chamber located on the other side of the piston rod, whereby the hydraulic oil can be conducted through a tube adjoining the second inlet and through a longitudinal bore provided in the piston into which the tube can be inserted.
  • the hose 'accesses to the Doppelplungerzylinder can be completely eliminated. This is associated with the fact that the corresponding Doppelplungerzylinder are easily installed even in tight spaces.
  • the inputs can be arranged on the cylinder bottom. Between the inputs and the distributor corresponding couplings can be arranged.
  • the longitudinal bore in the piston for receiving the tube and for passing the hydraulic oil can advantageously extend centrically along the piston axis.
  • the invention further relates to a gripper with at least one double-acting plunger cylinder according to the previously defined embodiment.
  • the at least one double-acting plunger cylinder is here combined in a structural unit, to which the distributor for the hydraulic oil adjoins. In this case, then be the distributor for the hydraulic oil to the unit flanged.
  • the distributor for the hydraulic oil can be integrated into the structural unit.
  • the welded construction may consist of a cover plate and a base plate and a central holding rod connecting them, around which the double-acting plunger cylinders are arranged between the base plate and the cover plate.
  • a further preferred embodiment includes that a part of the cylinder of the double-acting plunger cylinder is formed integrally with the stator of the rotary feedthrough for the hydraulic oil supply.
  • a significant simplification of the hydraulic oil supply can be achieved.
  • FIG. 1 is a drive 10 for a gripper, not shown here, which can be recognized for example on the stem of a hydraulic excavator shown.
  • the drive consists in its core of several double-acting plunger cylinders 12.
  • the plunger cylinders 12 each have a cylinder 14 and a piston rod 16.
  • the plunger cylinders 12 are part of a structural unit, which is designed in the present case as a welded construction.
  • This assembly consists of a cover plate 18 and a bottom plate 20, which are connected to each other via a central support rod 22. Arranged around this central support rod 22, the plunger cylinders 12 are arranged.
  • the piston rod 16 of the double-acting plunger cylinder 12 each has a bearing eye 24, via which the movement is transferable to a transmission.
  • a corresponding longitudinal slot can be provided in the cylinder 14. In the embodiment shown here, however, instead of a longitudinal slot of the cylinder 14 is divided into two, so that here in the central region which is not covered by the cylinder, a free movement of the bearing eye 24 is possible.
  • a plunger cylinder 12 is shown cut open. Between the piston rod 16 and the cylinder 14, a pressure chamber 26 is formed in each case. In this, the hydraulic oil is pressed to move the piston rod 16 and pushed out in a countermovement by the piston rod from the pressure chamber again.
  • two inputs 30 and 32 are formed in the cylinder bottom 28 . These inputs are connected to a hydraulic oil source as will be shown below.
  • the inlet 30 is connected to the immediately adjacent pressure chamber 26 and allows inflow of the hydraulic oil into this chamber and outflow of the hydraulic oil out of this chamber.
  • the inlet 32 which is arranged centrally in the cylinder bottom 28, is connected to a tube 34, which extends into a bore 36 within the piston rod 16. Through the inlet 32, the tube 34 and finally the longitudinal bore 36, the hydraulic oil can flow into the pressure chamber 26 opposite the inlet 32 or flow out therefrom.
  • connects to the inputs 30 and 32 each have a manifold 38 for the hydraulic oil.
  • manifold 38 for the hydraulic oil In this appropriate distribution channels 40 are provided.
  • the distributor plate for the hydraulic oil is connected directly to the cover plate 18 as part of the welded construction.
  • a known open rotary drive 41 Placed on the manifold 38 is a known open rotary drive 41, which is connectable via a bearing eye 42, for example, with the stem of an excavator and a corresponding patch rotary union 44 through which the hydraulic oil are also routed in the manifold 38 in a known manner can.
  • FIG. 2 shows a variant, which largely corresponds to those according to FIG. 1 equivalent.
  • the cover plate is 18th the welded construction replaced by a flanged in this embodiment manifold 39.
  • the distributor 39 can also be designed screw-on. This has the advantage that the material can be chosen freely and that the distributor can be processed better.
  • bearing eyes 46 are provided, which are welded to the bottom plate 20.
  • only one double-acting plunger cylinder 12 is included, which can be provided here, for example, as a drive for a clamshell grab.
  • the hydraulic oil supply takes place here via a compact rotary drive 50 with integrated rotary feedthrough 52, which also serves as a distributor plate for supplying the pressure chambers with hydraulic oil.
  • the cylinder 14 is provided in the embodiment shown here with a flange 54.
  • the basic structure of the hydraulic oil supply within the Doppelplungerzylinders 12 corresponds to that as previously based on the FIG. 1 was explained in detail.
  • the embodiment according to the FIG. 3 corresponds largely to that according to FIG. 4 ,
  • the bottom piece 56 of the cylinder 14 is formed so as to be integrally formed with the stator 58 of the rotary leadthrough 52.
  • a substantial simplification of the hydraulic oil supply is achieved.
  • FIGS. 5 and 6 show different versions of the hydraulic oil supply from the distributor plate 38 in the inputs 30 and 32.
  • each differently constructed coupling elements are included.
  • FIG. 5 extend the coupling elements 60 each in blind hole-like holes in the distributor plate 38 and in the cylinder bottom 28th
  • couplings 62 in the form of screwed sockets containing only in blind holes in the distributor plate 38 extend. They are here via sealing rings 64 sealed on the surface of the cylinder bottom 28. In the region of the tube 34, however, a pipe holding part 66 corresponding to the coupling piece 62 is provided within the cylinder bottom 28.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Claims (10)

  1. Cylindre plongeur (12) à double action avec une tige de piston (16) et un cylindre (14), où sont réalisées dans le cylindre des chambres de pression (26) pour la réception de l'huile hydraulique,
    caractérisé
    en ce que sont prévues dans une chambre de pression (26) du cylindre deux entrées (30, 32), qui peuvent être alimentées en huile hydraulique par un distributeur (33) qui faite suite,
    en ce qu'une des deux entrées (30, 32) forme la liaison à la chambre de pression (26) faisant directement suite et
    en ce que la deuxième entrée (32) forme la liaison avec la chambre de pression située de l'autre côté de la tige de piston (16), où l'huile hydraulique peut être guidée par un tube (34) faisant suite à la deuxième entrée et un perçage longitudinal (36) prévu dans le piston (18), dans lequel est insérable le tube (34).
  2. Cylindre plongeur à double action selon la revendication 1, caractérisé en ce que les entrées sont disposées au fond du cylindre, et en ce que sont disposés des couplages (60) entre les entrées (30, 32) et le distributeur (33).
  3. Cylindre plongeur à double action selon la revendication 1 ou 2, caractérisé en ce que le perçage longitudinal (36) dans le piston (18), pour la réception du tube et pour le passage de l'huile hydraulique s'étend d'une manière centrée le long de l'axe du piston.
  4. Cylindre plongeur à double action selon l'une quelconque des revendications ci-dessus, caractérisé en ce qu'un oeillet de palier (24) est rapporté au piston.
  5. Entraînement (10) pour un dispositif de préhension avec au moins un cylindre plongeur à double action (12) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un cylindre plongeur à double action est réuni en une unité de construction à laquelle fait suite le distributeur (33) pour l'huile hydraulique.
  6. Entraînement (10) selon la revendication 5, caractérisé en ce que le distributeur (33) pour l'huile hydraulique peut être bridé à l'unité de construction.
  7. Entraînement (10) selon la revendication 5, caractérisé en ce que le distributeur (33) pour l'huile hydraulique est intégré dans l'unité de construction.
  8. Entraînement (10) selon l'une des revendications précédentes, caractérisé en ce que sont placés sur la plaque de distributeur (33) un organe d'entraînement en rotation ouvert (41) et un passage tournant (44).
  9. Entraînement selon l'une des revendications précédentes, caractérisé en ce que la construction de soudage est constituée d'une plaque de recouvrement (18) et d'une plaque de fond (20) et d'une tige de retenue centrique (22) reliant celles-ci, autour de laquelle sont disposés le cylindre plongeur à double action (12) entre la plaque de fond (20) et la plaque de recouvrement (18).
  10. Entraînement selon l'une des revendications précédentes, caractérisé en ce qu'une partie du cylindre plongeur à double action est réalisée en une pièce avec le stator du passage tournant (44) pour l'amenée de l'huile hydraulique.
EP06776676A 2005-11-14 2006-08-08 Cylindre plongeur a double action et entrainement pour un dispositif de prehension Not-in-force EP1948944B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005017762U DE202005017762U1 (de) 2005-11-14 2005-11-14 Doppelwirkender Plungerzylinder und Antrieb für einen Greifer
PCT/EP2006/007837 WO2007054145A1 (fr) 2005-11-14 2006-08-08 Cylindre plongeur a double action et entrainement pour un dispositif de prehension

Publications (2)

Publication Number Publication Date
EP1948944A1 EP1948944A1 (fr) 2008-07-30
EP1948944B1 true EP1948944B1 (fr) 2009-01-21

Family

ID=37067564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06776676A Not-in-force EP1948944B1 (fr) 2005-11-14 2006-08-08 Cylindre plongeur a double action et entrainement pour un dispositif de prehension

Country Status (4)

Country Link
EP (1) EP1948944B1 (fr)
AT (1) ATE421641T1 (fr)
DE (2) DE202005017762U1 (fr)
WO (1) WO2007054145A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007005803U1 (de) * 2007-04-19 2007-09-20 Berends, Reiner Zylindermedienversorgung mittels Kugeldrehdurchführung und doppeltem Zylinderrohr
CN112855657A (zh) * 2019-10-18 2021-05-28 廖富爱 一种大直径液压油缸及其使用方法
DE202020104693U1 (de) 2020-08-13 2021-11-16 Rolf Mieger Antrieb für einen Greifer, Greifer und Baumaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2403480A1 (de) * 1974-01-25 1975-08-07 Salzgitter Maschinen Ag Rueckvorrichtung, insbesondere fuer strebfoerderer
DE3103987C2 (de) * 1981-02-05 1982-10-21 Liebherr-Hydraulikbagger Gmbh, 7951 Kirchdorf Schwenkbarer Grabenräumlöffel
DE9407859U1 (de) * 1994-05-11 1994-09-01 Mieger, Rolf, 88457 Kirchdorf Hydraulisch schwenkbarer Grabenräumlöffel

Also Published As

Publication number Publication date
WO2007054145A1 (fr) 2007-05-18
EP1948944A1 (fr) 2008-07-30
DE502006002737D1 (de) 2009-03-12
DE202005017762U1 (de) 2007-03-29
ATE421641T1 (de) 2009-02-15

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