EP0372013B1 - Stone tongs for excavators - Google Patents

Stone tongs for excavators Download PDF

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Publication number
EP0372013B1
EP0372013B1 EP19890902015 EP89902015A EP0372013B1 EP 0372013 B1 EP0372013 B1 EP 0372013B1 EP 19890902015 EP19890902015 EP 19890902015 EP 89902015 A EP89902015 A EP 89902015A EP 0372013 B1 EP0372013 B1 EP 0372013B1
Authority
EP
European Patent Office
Prior art keywords
shovel
excavators
holding elements
dipper
digging
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
EP19890902015
Other languages
German (de)
French (fr)
Other versions
EP0372013A1 (en
Inventor
Peter Ruf
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.)
SCHWEISSWERK GISCHIG AG
Original Assignee
SCHWEISSWERK GISCHIG AG
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 SCHWEISSWERK GISCHIG AG filed Critical SCHWEISSWERK GISCHIG AG
Priority to AT89902015T priority Critical patent/ATE92563T1/en
Publication of EP0372013A1 publication Critical patent/EP0372013A1/en
Application granted granted Critical
Publication of EP0372013B1 publication Critical patent/EP0372013B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • 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
    • E02F3/402—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors
    • E02F3/404—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors comprising two parts movable relative to each other, e.g. for gripping

Definitions

  • the invention relates to a special design of backhoe excavators, in particular with a gripping device for clearing rocks, according to the preamble of the present claim.
  • the digging buckets or the excavator shovels are replaced by special stone grabs in known excavators which are used for stone clearing work. These consist essentially of three to five circularly arranged, hydraulically operated grippers with which the stone or boulders are securely and be clamped. Larger stones or blocks can be lifted, moved and placed without any problems.
  • DE-A-31 32 392 proposes an implement which simultaneously meets the two requirements mentioned above.
  • This well-known backhoe excavator is equipped with a gripping device for clearing boulders, which the conventional digging bucket forms together with additional grabs mounted on the dipper arm, which can be pivoted independently of one another by hydraulic cylinders. With the additional grippers, the clearing material can be loaded onto the excavator bucket and a clamping effect, which is necessary to lift the clearing material, can be exerted.
  • the additional grippers are mounted directly on the dipper stick, so that the forceps of the additional grippers with the digging spoon depend on its movement relative to the dipper stick, so that the additional grippers have to be tracked synchronously with the movements of the digging spoon, which considerably complicates the control. In other words, in order to exert or maintain a clamping effect, every movement of the digging spoon requires an explicit tracking of the additional grippers.
  • the invention has for its object to provide a backhoe of the type specified, in which it is always ensured by simple design features that holding elements automatically follow the movement of the digging spoon, so that the clamping effect of the holding elements of movements of the digging spoon is independent.
  • tooth-like holding elements 1 are no longer fastened to the dipper arm 3 itself, but rather in that the fastening and articulation of the holding elements 1 on the digging spoon 2 take place directly.
  • these holding elements 1 are attached to the moving part, namely the digging spoon 2, and the hydraulic cylinders which move them are also supported on the digging spoon 2 in the swivel joint 4, it is achieved that the clamping effect of the holding elements 1 is independent of movements of the digging spoon 2 and no longer need to be tracked separately.
  • the holding elements will adapt to the shape of the clearing material (stones, boulders, etc.). As they are hydraulically controlled, the holding elements will change the angle of rotation until they hold the material to be cleared with the necessary pressure. The two holding elements 1 therefore do not need to have the same angle of rotation. Together with the digging spoon 3, the two holding elements form a pair of pliers that prevent the clearing material from falling out of the digging spoon.
  • the holding elements 1 Due to the optimal arrangement of the two holding elements 1 and a corresponding construction, the holding elements 1 can be pivoted completely upwards, so that the holding elements 1 can remain on the excavator shovel or bucket even during normal excavation work and no obstruction represent.
  • the holding elements 1 By mounting the holding elements 1 on the digging bucket (shovel) 2 it is achieved that they take part in all movements of the shovel 2.
  • the inventor has succeeded in finding a practical, practical and at the same time safe and comfortable solution to the problems mentioned at the beginning.
  • the simple construction method used at the same time guarantees a cost-effective production. Because of this expediency mentioned, this gripping device will find rapid spread.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Shovels (AREA)

Abstract

These stone tongs for excavators solve an old problem, namely that large stones present in the excavated earth cannot be lifted with an ordinary excavator shovel. This problem is solved by the invention by means of two additional gripper arms or tong elements (1) which can be mounted on an ordinary excavator shovel (2) and hydraulically controlled. Very large excavated stones can thereby be gripped in a tong-like manner and removed.

Description

Die Erfindung bezieht sich auf eine spezielle Ausbildung von Löffelbaggern, insbesondere mit einer Greifvorrichtung zum Räumen von Steinbrocken, gemäß dem Oberbegriff des vorliegenden Patentanspruchs.The invention relates to a special design of backhoe excavators, in particular with a gripping device for clearing rocks, according to the preamble of the present claim.

Bei Aushubarbeiten mit herkömmlichen Löffelbaggern werden auftretende große Steinbrocken, sofern Sie aufgrund ihrer Größe nicht durch den Grablöffel bzw. die Baggerschaufel ergreifbar sind, meist mit einem Seil oder einer Trosse am Löffelstiel befestigt und gehoben. Abgesehen davon, daß dies bei Erdbewegungsarbeiten sehr mühsam, schwerfällig und zeitaufwendig ist und eine nicht unerhebliche Bedrohung durch die latente Abrutschgefahr der Steinbrocken in sich birgt, ist auch eine zielgenaue Positionierung der Stein- bzw. Felsblöcke bedingt durch die meist eingeschränkte Beweglichkeit des Löffelstiels nur sehr schwer möglich.When excavating with conventional backhoe excavators, large boulders that occur are usually attached and lifted with a rope or hawser on the bucket arm, provided that their size does not allow them to be gripped by the digging bucket or excavator shovel. In addition to the fact that this is very tedious, cumbersome and time-consuming during earthmoving work and poses a not inconsiderable threat due to the latent risk of slipping of the boulders, a precise positioning of the blocks of stone or boulders is very limited due to the mostly restricted mobility of the dipper stick hardly possible.

Um diese Nachteile zu umgehen, sind bei bekannten Baggern, die für Steinräumarbeiten eingesetzt werden, die Grablöffel bzw. die Baggerschaufeln durch spezielle Steingreifer ersetzt. Diese bestehen im wesentlichen aus drei bis fünf kreisförmig angeordneten, hydraulisch betriebenen Greifern, mit denen die Stein- oder Felsblöcke sicher umfaßt und festgeklemmt werden. Größere Steine oder Festblöcke können dadurch problemlos gehoben, verschoben und plaziert werden.In order to avoid these disadvantages, the digging buckets or the excavator shovels are replaced by special stone grabs in known excavators which are used for stone clearing work. These consist essentially of three to five circularly arranged, hydraulically operated grippers with which the stone or boulders are securely and be clamped. Larger stones or blocks can be lifted, moved and placed without any problems.

Durch diese spezielle Ausbildung der Hebevorrichtung der Bagger können diese aber praktisch ausschließlich nur für Arbeiten eingesetzt werden, bei denen Steine gehoben werden müssen, da das spezielle Hebe- und Greifwerkzeug nicht für Erdaushubarbeiten geeignet ist. Bei entsprechenden Aushubarbeiten müßte der komplette Steingreifer am Löffelstiel durch einen geeigneten Grablöffel bzw. eine Baggerschaufel ausgetauscht werden. Ein ständiges Ummontieren dieser Hebe- bzw. Grabwerkzeuge ist aber in realiter nicht diskutabel und birgt zudem ein erhebliches Gefahrenpotential in sich.Due to this special design of the lifting device of the excavator, these can practically only be used only for work in which stones have to be lifted, since the special lifting and gripping tool is not suitable for excavation work. In the case of corresponding excavation work, the complete stone grab on the dipper stick would have to be replaced by a suitable digging bucket or an excavator shovel. Constant reassembly of these lifting or digging tools is not, however, a matter of discussion in realiter and also entails a considerable risk potential.

In der DE-A-31 32 392 wird ein Arbeitsgerät vorgeschlagen, das beiden oben angeführten Anforderungen gleichzeitig gerecht wird. Dieser bekannte Löffelbagger ist zum Räumen von Steinbrocken mit einer Greifvorrichtung ausgerüstet, die der herkömmliche Grablöffel zusammen mit am Löffelstiel montierten Zusatzgreifern, die unabhängig voneinander durch Hydraulikzylinder schwenkbar sind, ausbildet. Durch die Zusatzgreifer kann das Räumgut auf die Baggerschaufel geladen und eine klemmende Wirkung, die zum Anheben des Räumguts notwendig ist, ausgeübt werden.DE-A-31 32 392 proposes an implement which simultaneously meets the two requirements mentioned above. This well-known backhoe excavator is equipped with a gripping device for clearing boulders, which the conventional digging bucket forms together with additional grabs mounted on the dipper arm, which can be pivoted independently of one another by hydraulic cylinders. With the additional grippers, the clearing material can be loaded onto the excavator bucket and a clamping effect, which is necessary to lift the clearing material, can be exerted.

Dadurch aber, daß die Zusatzgreifer direkt am Löffelstiel montiert sind, ist die Zangenwirkung der Zusatzgreifer mit dem Grablöffel von dessen Bewegung relativ zum Löffelstiel abhängig, so daß die Zusatzgreifer synchron zu den Bewegungen des Grablöffels nachgeführt werden müssen, was die Steuerung erheblich verkompliziert. Mit anderen Worten, um eine klemmende Wirkung auszuüben bzw. aufrechtzuerhalten, erfordert jede Bewegung des Grablöffels ein explizites Nachführen der Zusatzgreifer.However, because the additional grippers are mounted directly on the dipper stick, the forceps of the additional grippers with the digging spoon depend on its movement relative to the dipper stick, so that the additional grippers have to be tracked synchronously with the movements of the digging spoon, which considerably complicates the control. In other words, in order to exert or maintain a clamping effect, every movement of the digging spoon requires an explicit tracking of the additional grippers.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Löffelbagger der angegebenen Gattung zu schaffen, bei dem durch einfache Konstruktionsmerkmale immer gewährleistet wird, daß Halteelemente automatisch der Bewegung des Grablöffels folgen, so daß die klemmende Wirkung der Halteelemente von Bewegungen des Grablöffels unabhängig ist.Starting from this prior art, the invention has for its object to provide a backhoe of the type specified, in which it is always ensured by simple design features that holding elements automatically follow the movement of the digging spoon, so that the clamping effect of the holding elements of movements of the digging spoon is independent.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruchs aufgeführten Merkmale gelöst.This object is achieved by the features listed in the characterizing part of the claim.

Diese Lösung besteht in erster Linie darin, daß zahnartige Haltelemente 1 nicht mehr am Löffelstiel 3 selbst befestigt sind, sondern darin, daß die Befestigung und Anlenkung der Haltelemente 1 am Grablöffel 2 direkt erfolgt. Dadurch, daß diese Haltelemente 1 am beweglichen Teil, nämlich am Grablöffel 2, befestigt sind und die sie bewegenden Hydraulikzylinder sich ebenfalls am Grablöffel 2 im Drehgelenk 4 abstützen, wird erreicht, daß die klemmende Wirkung der Halteelemente 1 von Bewegungen des Grablöffels 2 unabhängig ist und somit nicht mehr separat nachgeführt werden müssen. Zusätzlich werden die Halteelemente sich der Form des Räumguts (Steine, Felsblöcke etc.) anpassen. Da sie hydraulisch gesteuert sind, werden die Halteelemente den Drehwinkel so lange verändern, bis sie mit dem notwendigen Druck das Räumgut festhalten. Die beiden Halteelemente 1 brauchen somit nicht den gleichen Drehwinkel zu haben. Zusammen mit dem Grablöffel 3 bilden die beiden Haltelemente eine Zange, die verhindert, daß das Räumgut aus dem Grablöffel fallen kann.This solution consists primarily in the fact that tooth-like holding elements 1 are no longer fastened to the dipper arm 3 itself, but rather in that the fastening and articulation of the holding elements 1 on the digging spoon 2 take place directly. Characterized in that these holding elements 1 are attached to the moving part, namely the digging spoon 2, and the hydraulic cylinders which move them are also supported on the digging spoon 2 in the swivel joint 4, it is achieved that the clamping effect of the holding elements 1 is independent of movements of the digging spoon 2 and no longer need to be tracked separately. In addition, the holding elements will adapt to the shape of the clearing material (stones, boulders, etc.). As they are hydraulically controlled, the holding elements will change the angle of rotation until they hold the material to be cleared with the necessary pressure. The two holding elements 1 therefore do not need to have the same angle of rotation. Together with the digging spoon 3, the two holding elements form a pair of pliers that prevent the clearing material from falling out of the digging spoon.

Mit dem erfindungsgemäßen Löffelbagger wurde ein Arbeitsgerät geschaffen, welches sowohl für den Erdaushub wie für das Aufheben von schwerem Räumgut geeignet ist.With the backhoe excavator according to the invention, an implement has been created which is suitable both for excavating earth and for picking up heavy clearing material.

Der Gegenstand der Erfindung wird anhand der beigefügten, schematischen Zeichnung beispielsweise noch näher erläutert. In dieser ist:

Fig. 1
eine Seitenansicht einer erfindungsgemäßen Greifvorrichtung und
Fig. 2
eine Draufsicht der Anordnung gemäß Fig. 1.
The object of the invention is explained in more detail, for example, with the aid of the attached schematic drawing. In this is:
Fig. 1
a side view of a gripping device according to the invention and
Fig. 2
2 shows a top view of the arrangement according to FIG. 1.

Die grundlegenden Neuerungen sind nun folgende: Durch die optimale Anordnung der zwei Halteelemente 1 und einer entsprechenden Konstruktion, können die Halteelemente 1 komplett nach oben geschwenkt werden, so dass auch bei normalen Baggerarbeiten die Halteelemente 1 an der Baggerschaufel bzw. amlöffel verbleiben können und keine Behinderung darstellen. Durch die Montage der Halteelemente 1 am Grablöffel (Schaufel) 2 wird erreicht, dass sie alle Bewegungen der Schaufel 2 mitmachen. Mit dem hier beschriebenen Patent ist es dem Erfinder gelungen, eine praktische, zweckmässige und gleichzeitig gefahrlose und komfortable Lösung für die anfangs erwähnten Probleme zu finden. Die dabei angewandte einfache Konstruktionsweise gibt gleichzeitig Gewähr für eine kostengünstige Herstellung. Aufgrund dieser erwähnten Zweckmässigkeit, wird diese Greifvorrichtung eine schnelle Verbreitung finden.The basic innovations are now as follows: Due to the optimal arrangement of the two holding elements 1 and a corresponding construction, the holding elements 1 can be pivoted completely upwards, so that the holding elements 1 can remain on the excavator shovel or bucket even during normal excavation work and no obstruction represent. By mounting the holding elements 1 on the digging bucket (shovel) 2 it is achieved that they take part in all movements of the shovel 2. With the patent described here, the inventor has succeeded in finding a practical, practical and at the same time safe and comfortable solution to the problems mentioned at the beginning. The simple construction method used at the same time guarantees a cost-effective production. Because of this expediency mentioned, this gripping device will find rapid spread.

Claims (1)

  1. Power shovel with a shovel dipper (2) swivel-mounted to a shovel arm (3), said shovel dipper (2) along with tooth-like retaining elements (1) forming a grabbing device for the purpose of clearing rock debris, said retaining elements (1) being independently rotatable by way of hydraulic cylinders about an axis, said axis being stationary with respect to the shovel dipper (2), wherein the tooth-like retaining elements (1) are each mounted directly to the shovel dipper (2) or to a component rigidly connected thereto and the hydraulic cylinders are each supported on the shovel dipper (2) or on a component rigidly connected thereto.
EP19890902015 1988-05-30 1989-02-16 Stone tongs for excavators Expired - Lifetime EP0372013B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89902015T ATE92563T1 (en) 1988-05-30 1989-02-16 STONE CLAMPS FOR EXCAVATORS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH205188A CH676480A5 (en) 1988-05-30 1988-05-30
CH2051/88 1988-05-30

Publications (2)

Publication Number Publication Date
EP0372013A1 EP0372013A1 (en) 1990-06-13
EP0372013B1 true EP0372013B1 (en) 1993-08-04

Family

ID=4224777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890902015 Expired - Lifetime EP0372013B1 (en) 1988-05-30 1989-02-16 Stone tongs for excavators

Country Status (3)

Country Link
EP (1) EP0372013B1 (en)
CH (1) CH676480A5 (en)
WO (1) WO1989012145A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4108315C2 (en) * 1991-03-14 1995-11-23 Josef Maier Earth-moving machine, in particular excavators
DE4218502C2 (en) * 1992-06-04 1994-10-06 Josef Maier Earth-moving machine, in particular excavators
DE9310018U1 (en) * 1993-07-06 1993-08-26 Nagler Juergen Excavator bucket handling tool with a shovel
US6742291B2 (en) * 2001-08-06 2004-06-01 Denis Frigon Thumb for scooping tool arm
US7240441B2 (en) 2004-02-12 2007-07-10 Mccoy Ted Excavator thumb for use with excavator equipment
KR101669327B1 (en) 2014-07-30 2016-10-25 이소정 A grab link device for fastening the bucket
KR102105204B1 (en) * 2018-09-11 2020-04-27 이창업 Safety grapple for excavtor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU422410B1 (en) * 1966-08-12 1972-03-16 Channel Construction, Inc Clamping device
US4407626A (en) * 1981-01-30 1983-10-04 Bruckner Peter J Gripping device
US4375345A (en) * 1981-07-23 1983-03-01 J. I. Case Company Clamping arm assembly for a backhoe
DE3132392A1 (en) * 1981-08-17 1983-03-03 Krupp Mak Maschinenbau Gmbh, 2300 Kiel Design of earth-moving gear, in particular as attachments for armoured vehicles

Also Published As

Publication number Publication date
EP0372013A1 (en) 1990-06-13
CH676480A5 (en) 1991-01-31
WO1989012145A1 (en) 1989-12-14

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