EP2489788B1 - Outil de préhension doté d'unités piston-cylindre hydrauliques - Google Patents

Outil de préhension doté d'unités piston-cylindre hydrauliques Download PDF

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Publication number
EP2489788B1
EP2489788B1 EP12000502.0A EP12000502A EP2489788B1 EP 2489788 B1 EP2489788 B1 EP 2489788B1 EP 12000502 A EP12000502 A EP 12000502A EP 2489788 B1 EP2489788 B1 EP 2489788B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
gripping tool
accordance
attachment piece
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
EP12000502.0A
Other languages
German (de)
English (en)
Other versions
EP2489788A3 (fr
EP2489788A2 (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.)
MIEGER, ROLF
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
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Priority to PL12000502T priority Critical patent/PL2489788T3/pl
Publication of EP2489788A2 publication Critical patent/EP2489788A2/fr
Publication of EP2489788A3 publication Critical patent/EP2489788A3/fr
Application granted granted Critical
Publication of EP2489788B1 publication Critical patent/EP2489788B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/14—Grabs opened or closed by driving motors thereon
    • B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2271—Actuators and supports therefor and protection therefor

Definitions

  • the invention relates to a gripping tool with at least one hydraulic piston-cylinder unit according to the preamble of claim 1.
  • Hydraulic piston-cylinder units find wide applications in the drive of work tools, especially when pivoting high, low and ditch cleaning buckets.
  • a hydraulically operated trenching bucket is known, which is pivotally mounted on a arranged at the front end of the excavator dipper support piece.
  • the pivoting movement of the bucket is effected by a piston-cylinder unit which is arranged in a carrier located in the upper edge region of the bucket.
  • the support piece is connected to a coupling rod, which engages the piston-cylinder unit.
  • the carrier is preferably tubular and receives the cylinder of the piston-cylinder unit.
  • the coupling rod is pivotally connected in its end regions with the supporting part of the construction machine and with the piston-cylinder unit.
  • the connection with the piston-cylinder unit is usually carried out by means of an arranged on the piston extension piece, which protrudes from the piston-cylinder unit receiving carrier.
  • a gripping tool in which the aforementioned problems would be solved in that the piston is slidably received in a cylinder designed as Doppelplunger cylinder and at least one protruding from the cylinder neckpiece, by means of which the piston with a coupling rod is connected so that a gripper cup serving as a working tool can be pivoted by a movement of the piston.
  • the piston is slidably received in a cylinder designed as Doppelplunger cylinder and at least one protruding from the cylinder neckpiece, by means of which the piston with a coupling rod is connected so that a gripper cup serving as a working tool can be pivoted by a movement of the piston.
  • the cylinder has fastening means, by means of which it can be attached to the working tool or on the support part of the pivot drive.
  • the object of the invention is to develop a generic gripping tool in such a way that it builds lower and is even less susceptible to interference even in rough operation on the construction site.
  • this object is achieved by the combination of the features of claim 1. Accordingly, starting from a generic gripping tool according to the DE 801 947 C the extension piece is guided as a bolt directly through the piston, which is slidably received in a cylinder designed as a double plunger cylinder.
  • the extension piece is no longer brought out far up or down from the cylinder housing.
  • the manufacturing costs can be significantly reduced, since no more welding work to be performed here. Rather, the extension piece designed as a pin can be inserted directly through a bore provided in the piston.
  • the double-cylinder cylinder already existing significant advantage of the quick assembly and disassembly and the easy replacement of the piston-cylinder unit is due to the particularly simple mounting option the designed as a bolt lug significantly improved.
  • the cylinder is divided into two, with each part of the second divided cylinder receiving an end portion of the piston.
  • the piston has a larger diameter than the end regions of the piston which dive into the cylinder regions, as a result of which the strength of the piston rod in the region in which the bore for receiving the bolt has been weakened, is increased.
  • the designed as a bolt lug is particularly advantageous centered through the piston. Due to this central articulation, an absolute synchronization of the gripping shells connected to the end piece is possible.
  • the extension can also be offset and guided off-center by the piston.
  • the bolt-like extension piece is led out on both sides of the piston and connected on both sides via coupling rods with gripping shells.
  • a pressure relief valve is arranged in the piston so that when a positive pressure in the space between the cylinder and piston pressure equalization can take place.
  • the pressure relief valve may be formed as a check valve, which for pressure equalization existing in the cylinder parts Pressure chambers by means of a push-up means is alsmplebar, so that there is a pressure equalization. Due to this targeted production of pressure compensation can be dispensed with mechanical stops for grab trays.
  • the invention is not limited to a piston-cylinder unit. Rather, several cylinders can be arranged in parallel according to the invention.
  • FIG. 1a shows a partially sectioned side view of a gripping tool 10, in which the gripper shells 12 shown are shown in the closed and open position.
  • FIG. 1b is a plan view of the piston-cylinder unit 14 is shown.
  • the piston-cylinder unit 14 consists of a piston 16, with its ends immersed in the respective parts 18 and 20 of a split cylinder.
  • the cylinder halves 18 and 20 thus form a so-called double plunger cylinder, in which the piston 16 is slidably received.
  • the gripper shells 12 are, as in FIG. 1a shown, via coupling rods 24 and 26, which are respectively connected to the gripper shells 12 moves.
  • the pivoting movement is impressed on the gripper shells 12 via the coupling rods 24 by the movement of the piston 16 in the Doppelplunger cylinder 18, 20.
  • the coupling rods 24 and 26 are hinged to a neck piece 28.
  • the extension piece 28 is like the FIGS. 1a and 1b can be seen, designed as a bolt which is inserted through a recessed in the piston 16 bore. Like that FIGS. 1a and 1b it can be seen, the bore for receiving the bolt 28 is arranged symmetrically in the center of the piston 16.
  • FIG. 2 shows a detail according to FIG. 1 in a simplified embodiment, in which some parts have been omitted.
  • the cylinder parts 18 and 20 are usually connected to hydraulic lines 30 and 32.
  • cylinder parts 18 and 20 are sealed off from the pistons 16 via seals 34 and 36.
  • a longitudinal pressure equalization line 38 is arranged, which connects the two pressure chambers 40 and 42 within the cylinder parts 18 and 20.
  • a spring-loaded check valve 44 is arranged on one side of the pressure equalization line 38.
  • This valve can by means of a in the FIG. 2 shown abutment means 46, which is shown here as a mandrel, pushed open and thus when the piston approaches the cylinder wall 48 of the cylinder part 20.
  • the spike-like Auftschikar 46 pushes the spring-loaded valve ball of the pressure compensating valve 44 to the rear, so that a pressure equalization between the pressure chamber 42 and the pressure chamber 40 within the cylinder parts 18 and 20 takes place.
  • a claw grab with two gripping shells 12 has been described as gripping tool.
  • any other gripping tool designs which can be realized with a corresponding double plunger cylinder are encompassed by the invention.
  • several double-plunger cylinders can also be arranged parallel to one another, as can be seen, for example, in US Pat EP 0 957 209 B1 is described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Gripping On Spindles (AREA)

Claims (7)

  1. Outil de préhension (10) comprenant au moins une unité piston-cylindre (14) hydraulique dotée d'au moins un piston (16), qui est reçu coulissant dans un cylindre réalisé sous la forme d'un cylindre à double plongeur, et comporte au moins une pièce de raccord (28) dépassant du cylindre, au moyen de laquelle le piston (16) peut être relié à au moins une barre de couplage (24, 26) de telle manière qu'un godet de préhension (12) servant d'outil de travail peut être pivoté par un déplacement du piston (16), la pièce de raccord (28) étant guidée comme axe à travers le piston (16),
    caractérisé en ce que
    le cylindre est divisé en deux, chaque partie du cylindre (18, 20) divisé en deux recevant une partie d'extrémité du piston (16), et en ce que le piston (16), dans la zone à travers laquelle la pièce de raccord (28) en forme d'axe est insérée, présente un diamètre supérieur aux zones d'extrémité du piston (16) qui plongent dans les zones de cylindre (18, 20).
  2. Outil de préhension (10) selon la revendication 1, caractérisé en ce que la pièce de raccord (28) est guidée de manière centrée à travers le piston (28).
  3. Outil de préhension (10) selon la revendication 1, caractérisé en ce que la pièce de raccord (28) est guidée de manière décalée et excentrée à travers le piston (16).
  4. Outil de préhension (10) selon l'une des revendications 1 à 3, caractérisé en ce que la pièce de raccord (28) de type axe est guidée des deux côtés hors du piston (16) et reliée des deux côtés à des godets de préhension (12) par le biais de tiges de piston (24, 26).
  5. Outil de préhension (10) selon l'une des revendications 1 à 4, caractérisé en ce qu'une soupape de surpression (44) est intégrée dans le piston (16).
  6. Outil de préhension (10) selon la revendication 5, caractérisé en ce que la soupape de surpression (44) est réalisée sous la forme d'une soupape de non-retour, qui peut être heurtée pour l'ouvrir à l'aide d'un moyen d'impact (46) pour la compensation de la pression des chambres sous pression (40, 42) se trouvant dans les parties de cylindre (18, 20).
  7. Outil de préhension (10) selon l'une des revendications 1 à 6, caractérisé en ce que plusieurs cylindres sont disposés en parallèle.
EP12000502.0A 2011-02-21 2012-01-26 Outil de préhension doté d'unités piston-cylindre hydrauliques Active EP2489788B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12000502T PL2489788T3 (pl) 2011-02-21 2012-01-26 Narzędzie chwytające z hydraulicznymi zespołami tłokowo-cylindrowymi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202011002981U DE202011002981U1 (de) 2011-02-21 2011-02-21 Greifwerkzeug mit hydraulischen Kolben-Zylinder-Einheiten

Publications (3)

Publication Number Publication Date
EP2489788A2 EP2489788A2 (fr) 2012-08-22
EP2489788A3 EP2489788A3 (fr) 2015-08-19
EP2489788B1 true EP2489788B1 (fr) 2017-10-11

Family

ID=45560673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12000502.0A Active EP2489788B1 (fr) 2011-02-21 2012-01-26 Outil de préhension doté d'unités piston-cylindre hydrauliques

Country Status (3)

Country Link
EP (1) EP2489788B1 (fr)
DE (1) DE202011002981U1 (fr)
PL (1) PL2489788T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015005202U1 (de) * 2015-07-21 2016-10-24 Rolf Mieger Greifermechanik für den Greifer einer Baumaschine
CN106348165B (zh) * 2015-07-26 2019-03-26 乐清市芮易经济信息咨询有限公司 一种自清理式双绳多瓣抓斗
DE202020104693U1 (de) 2020-08-13 2021-11-16 Rolf Mieger Antrieb für einen Greifer, Greifer und Baumaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE801947C (de) * 1949-10-22 1951-01-29 Woehr Eisenwerk Hydraulischer Motorgreifer
FR1366036A (fr) * 1963-05-07 1964-07-10 Poclain Sa Perfectionnements aux bennes preneuses
US4005895A (en) * 1975-11-17 1977-02-01 Cullings Harold L Rotational grapple
JP2868259B2 (ja) * 1989-12-28 1999-03-10 日立建機株式会社 車両系建設機械の制振装置
DE9407859U1 (de) 1994-05-11 1994-09-01 Mieger, Rolf, 88457 Kirchdorf Hydraulisch schwenkbarer Grabenräumlöffel
DE29621253U1 (de) 1996-12-06 1997-05-22 Mieger, Rolf, Ing. (grad.), 88457 Kirchdorf Schwenkadapter
ATE353999T1 (de) 1998-05-12 2007-03-15 Rolf Mieger Hydraulische kolben-zylinder-einheit für einen schwenktrieb

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP2489788A3 (fr) 2015-08-19
PL2489788T3 (pl) 2018-03-30
EP2489788A2 (fr) 2012-08-22
DE202011002981U1 (de) 2012-05-22

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