EP1948944A1 - 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

Info

Publication number
EP1948944A1
EP1948944A1 EP06776676A EP06776676A EP1948944A1 EP 1948944 A1 EP1948944 A1 EP 1948944A1 EP 06776676 A EP06776676 A EP 06776676A EP 06776676 A EP06776676 A EP 06776676A EP 1948944 A1 EP1948944 A1 EP 1948944A1
Authority
EP
European Patent Office
Prior art keywords
double
cylinder
hydraulic oil
acting plunger
plunger cylinder
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
EP06776676A
Other languages
German (de)
English (en)
Other versions
EP1948944B1 (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
Original Assignee
Individual
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 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

Links

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.
  • 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.
  • 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 access 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.
  • a bearing eye can attach to the piston. About this then the movement can be transmitted via a corresponding linkage.
  • the invention further relates to a gripper with at least one double-acting plunger cylinder according to the previously defined embodiment.
  • a gripper with at least one double-acting plunger cylinder according to the previously defined embodiment.
  • at least one double-acting plunger cylinder in a structural unit, followed by the manifold for the hydraulic oil.
  • 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 shows a drive for a gripping tool according to a first embodiment of the present invention in a partially sectioned illustration
  • Figure 2 a drive according to Figure 1 according to a second modified
  • FIG. 3 shows a third embodiment of the present invention
  • Figure 4 a fourth embodiment of the present invention.
  • a drive 10 for a gripper which can be applied, 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 away. 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.
  • 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 that according to FIG.
  • the cover plate is 18th the welded construction replaced by a flanged in this Ausf ⁇ hrungsbeispiel 39 distributor.
  • 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 Doppelplun- gerzylinder 12 corresponds to that, as previously explained in detail with reference to FIG 1.
  • FIG. 3 largely corresponds to that according to FIG. 4.
  • the bottom piece 56 of the cylinder 14 is designed such that it is formed integrally with the stator 58 of the rotary leadthrough 52. As a result, a substantial simplification of the hydraulic oil supply is achieved.
  • FIG. 5 show different embodiments of the hydraulic oil supply from the distributor plate 38 in the inputs 30 and 32.
  • each differently constructed coupling elements are included.
  • the coupling elements 60 each extend in blind-hole-like bores in the distributor plate 38 or in the cylinder bottom 28.
  • couplings 62 in the form of screwed-in bushings are included, which are only in blind bores 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.
  • the coupling 60 according to FIG. 5 permits a radial seal and thus a greater axial displacement
  • the coupling 62 according to the embodiment variant according to FIG. 6 permits an end-side seal which permits a greater radial deviation than that according to FIG.

Landscapes

  • 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)
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 true EP1948944A1 (fr) 2008-07-30
EP1948944B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110748525A (zh) * 2019-10-18 2020-02-04 廖富爱 一种应力均匀分布的大直径液压油缸

Families Citing this family (2)

* 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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007054145A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110748525A (zh) * 2019-10-18 2020-02-04 廖富爱 一种应力均匀分布的大直径液压油缸
CN110748525B (zh) * 2019-10-18 2021-03-23 廖富爱 一种应力均匀分布的大直径液压油缸

Also Published As

Publication number Publication date
EP1948944B1 (fr) 2009-01-21
DE502006002737D1 (de) 2009-03-12
DE202005017762U1 (de) 2007-03-29
ATE421641T1 (de) 2009-02-15
WO2007054145A1 (fr) 2007-05-18

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