EP1528165B1 - Excavating or gripping tool - Google Patents

Excavating or gripping tool Download PDF

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Publication number
EP1528165B1
EP1528165B1 EP04020450A EP04020450A EP1528165B1 EP 1528165 B1 EP1528165 B1 EP 1528165B1 EP 04020450 A EP04020450 A EP 04020450A EP 04020450 A EP04020450 A EP 04020450A EP 1528165 B1 EP1528165 B1 EP 1528165B1
Authority
EP
European Patent Office
Prior art keywords
tooth
excavating
gripping tool
tooth tip
holder
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
EP04020450A
Other languages
German (de)
French (fr)
Other versions
EP1528165A1 (en
Inventor
Dirk Asam
Holf Mieger
Bernd Wager
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.)
Liebherr Hydraulikbagger GmbH
Original Assignee
Liebherr Hydraulikbagger GmbH
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 Liebherr Hydraulikbagger GmbH filed Critical Liebherr Hydraulikbagger GmbH
Publication of EP1528165A1 publication Critical patent/EP1528165A1/en
Application granted granted Critical
Publication of EP1528165B1 publication Critical patent/EP1528165B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2833—Retaining means, e.g. pins
    • E02F9/2841—Retaining means, e.g. pins resilient

Definitions

  • the invention relates to a grave tool, such as a spoon or a blade, or gripping tool with a gripper shell, to which at least one tooth tip is attached, according to the preamble of claim 1.
  • peel grab for material handling affected are used in particular for loading bulk materials, fine and coarse scrap, demolition material or for loading VA steels.
  • orange peel grabs for such a material change it has hitherto been customary in the applicant for worn gripper peeling tips to be severed and new gripper peeling tips to be welded on.
  • screw or plug tooth tips which are replaced after reaching the wear limit against new tips.
  • At least one Tooth tip is attached, wherein the digging or gripping tool at least one tooth holder is arranged, in which the at least one tooth tip inserted, trackable in length and securable by securing elements.
  • the tooth tip protrudes laterally or laterally out of the tooth holder to allow replacement and tracking by knocking.
  • Object of the present invention is to develop generic grave or gripping tools such that the replacement of the at least one tooth tip is inexpensive and easy.
  • At least one tooth holder is arranged on the digging tool or on the gripping tool, in which the at least one tooth tip can be inserted, tracked and secured in length.
  • a long tooth tip is provided at the lower end of the gripper shell, which is guided in an example welded-on tooth holder and is secured against failure.
  • the tooth holder is designed in a favorable shape, so that the penetration is not disturbed. Through the front opening of the tooth holder, the tooth tip protrudes outward to the extent that the gripper closes well.
  • the tooth tip is designed such that it is trackable in length and fixable after appropriate tracking, that is securable.
  • the tooth tip has on one side a plurality of stepped-like arranged pockets, wherein in the tooth holder at a corresponding point an opening is provided so that the pockets are accessible from the outside.
  • the tooth holder and / or the tooth tip of wear-resistant material such as cast steel exist.
  • a wear plate of wear-resistant material can advantageously be applied via the tooth holder.
  • the tooth tip can laterally have a plurality of bores, which forms a perforated grid for receiving securing elements.
  • screw or clamping elements such as wedges, clamping tongues or the like can be used.
  • FIG. 1 is a customary gripper shell 10 is shown, the tip is cut to length. Instead of the cut-to-length tip, a tooth holder 12 is welded to the gripper shell 10, which has a receiving bore for receiving a tooth tip 14.
  • the tooth tip 14 is made of wear-resistant cast steel.
  • the shape of the tooth tip results in particular from the sectional views according to the FIGS. 3 and 4 , This shows that the tooth tip has a series of juxtaposed holes 16, which form a hole pattern for receiving locking pins.
  • the locking pins 18 can, as in FIG. 4 shown on the one hand through the holes in the tooth tip 14 and on the other hand are inserted through corresponding holes in the tooth holder 12. Preferably, they are so-called Connex-Schwerstanntere. In the embodiment shown here, as in the FIGS. 1 . 3 and 4 shown two adjacent locking pins 18 provided.
  • the locking pins 18 can be removed and the tooth tip can be pulled out around a hole pattern, so that the locking pins can be taken again.
  • this has at one end step-like arranged pockets 20, which form a kind of stair gearing.
  • a tool for expelling the tooth tip can engage in the staircase toothing.
  • this tool not shown here, which can be designed similar to a chisel, and a hammer, the tooth tip 14 can be expelled.
  • a wear plate 24 can additionally be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Table Equipment (AREA)
  • Confectionery (AREA)

Abstract

At least one tooth (14) can be inserted in its length direction into one or more tooth holders (12) in the tool. The length of the tooth protruding from the holder can be adjusted. Fixing parts are used to secure the tooth inside the holder. Clamping pins (18), screws or clamping parts such as wedges or clamping tongues are used as fixing parts. The tool comprises a shell (10) with at least one pointed tooth.

Description

Die Erfindung betrifft ein Grabwerkzeug, wie beispielsweise ein Löffel oder eine Schaufel, bzw. Greifwerkzeug mit einer Greiferschale, an die mindestens eine Zahnspitze angesetzt ist, gemäß dem Oberbegriff von Anspruch 1.The invention relates to a grave tool, such as a spoon or a blade, or gripping tool with a gripper shell, to which at least one tooth tip is attached, according to the preamble of claim 1.

Insbesondere sind hier Mehrschalengreifer für den Materialumschlag betroffen. Diese dienen insbesondere der Verladung von Schüttgütern, Fein- und Grobschrott, Abbruchmaterial oder auch zum Verladen von VA-Stählen. Speziell bei Mehrschalengreifern für einen derartigen Materialumschlag ist es bei der Anmelderin bislang üblich, dass verschlissene Greiferschalenspitzen abgetrennt und neue Greiferschalenspitzen aufgeschweißt werden müssen. Es sind andere Mehrschalengreifer bekannt, bei denen es schraub- oder steckbare Zahnspitzen gibt, die nach Erreichen der Verschleißgrenze gegen neue Spitzen ersetzt werden.In particular, here are peel grab for material handling affected. These are used in particular for loading bulk materials, fine and coarse scrap, demolition material or for loading VA steels. Especially in the case of orange peel grabs for such a material change, it has hitherto been customary in the applicant for worn gripper peeling tips to be severed and new gripper peeling tips to be welded on. There are other orange peel grabs are known in which there are screw or plug tooth tips, which are replaced after reaching the wear limit against new tips.

Das Auswechseln verschlissener Zahnspitzen ist aufwendig und kostenintensiv.The replacement of worn tooth tips is complicated and costly.

Aus GB 103 025 A , US-A-2 828 558 , US-A-1 540 314 , JP 50 026302 A und JP 05 311703 A sind daher Grab- bzw. Greifwerkzeuge bekannt, an dem mindestens eine Zahnspitze angesetzt ist, wobei am Grab- oder Greifwerkzeug mindestens ein Zahnhalter angeordnet ist, in dem die mindestens eine Zahnspitze einsteckbar, in der Länge nachführbar und durch Sicherungselemente sicherbar ist. Bei diesen Vorrichtungen ragt die Zahnspitze jedoch hinten oder seitlich aus dem Zahnhalter heraus, um das Auswechseln und Nachführen durch Ausschlagen zu ermöglichen.Out GB 103 025 A . US-A-2,828,558 . US-A-1 540 314 . JP 50 026302 A and JP 05 311703 A Therefore grave or gripping tools are known, at least one Tooth tip is attached, wherein the digging or gripping tool at least one tooth holder is arranged, in which the at least one tooth tip inserted, trackable in length and securable by securing elements. In these devices, however, the tooth tip protrudes laterally or laterally out of the tooth holder to allow replacement and tracking by knocking.

Aufgabe der vorliegenden Erfindung ist es, gattungsgemäße Grab- bzw. Greifwerkzeuge derart weiterzubilden, dass das Auswechseln der mindestens einen Zahnspitze kostengünstig und einfach erfolgt.Object of the present invention is to develop generic grave or gripping tools such that the replacement of the at least one tooth tip is inexpensive and easy.

Erfingdungsgemäß wird diese Aufgabe dadurch gelöst, dass ein gattungsgemäßes Grab- bzw. Greifwerkzeug die Merkmale des kennzeichnenden Teils des Anspruchs 1 aufweist.According to the invention, this object is achieved in that a generic grave or gripping tool has the features of the characterizing part of claim 1.

Demnach ist an dem Grabwerkzeug bzw. an dem Greifwerkzeug mindestens ein Zahnhalter angeordnet, in dem die mindestens eine Zahnspitze einsteckbar, in der Länge nachführbar und sicherbar ist. Es wird also am unteren Ende der Greiferschale eine lange Zahnspitze vorgesehen, die in einem beispielsweise aufgeschweißten Zahnhalter geführt ist und gegen Ausfallen gesichert ist. Der Zahnhalter ist dabei in einer günstigen Form gestaltet, so dass das Eindringverhalten nicht gestört ist. Durch die vordere Öffnung des Zahnhalters ragt die Zahnspitze soweit nach außen hervor, dass der Greifer gut schließt. Die Zahnspitze ist derart ausgestaltet, dass sie in ihrer Länge nachführbar und nach entsprechender Nachführung festlegbar, das heißt sicherbar ist. Erfindungsgemäß weist die Zahnspitze auf einer Seite mehrere treppenartig angeordnete Taschen auf, wobei im Zahnhalter an entsprechender Stelle ein Durchbruch vorgesehen ist, so dass die Taschen von außen zugänglich sind. Hierdurch kann nach entsprechendem Lösen der Sicherungsstifte durch ein Einsetzen eines entsprechenden Werkzeuges und einem zugehörigen Hammer die Zahnspitze ausgeschlagen, das heißt gelockert und nach vorne hin bewegt werden.Accordingly, at least one tooth holder is arranged on the digging tool or on the gripping tool, in which the at least one tooth tip can be inserted, tracked and secured in length. Thus, a long tooth tip is provided at the lower end of the gripper shell, which is guided in an example welded-on tooth holder and is secured against failure. The tooth holder is designed in a favorable shape, so that the penetration is not disturbed. Through the front opening of the tooth holder, the tooth tip protrudes outward to the extent that the gripper closes well. The tooth tip is designed such that it is trackable in length and fixable after appropriate tracking, that is securable. According to the tooth tip has on one side a plurality of stepped-like arranged pockets, wherein in the tooth holder at a corresponding point an opening is provided so that the pockets are accessible from the outside. As a result, after appropriate release of the locking pins by inserting a corresponding tool and an associated hammer, the tooth tip knocked out, that is loosened and moved forward.

Somit kann bei fortgeschrittenem Verschleiß die Zahnspitze gelöst werden, ein Lochraster weiter herausgezogen werden und wieder gesichert werden. Ein kostenaufwendiges und umständliches Wechseln der Zahnspitzen ist damit wesentlich seltener notwendig.Thus, with advanced wear, the tooth tip can be loosened, a hole pattern can be further pulled out and secured again. A costly and laborious changing the tooth tips is therefore much less necessary.

Besondere Ausgestaltungen der Erfindung ergeben sich aus den sich an den Hauptanspruch anschließenden Unteransprüchen.Particular embodiments of the invention will become apparent from the subsequent claims to the main claim.

Demnach kann der Zahnhalter und/oder die Zahnspitze aus verschleißfestem Material, beispielsweise Stahlguss, bestehen.Accordingly, the tooth holder and / or the tooth tip of wear-resistant material, such as cast steel exist.

Weiterhin kann vorteilhaft über den Zahnhalter eine Verschleißplatte aus verschleißfestem Material aufgebracht sein. Die Zahnspitze kann seitlich mehrere Bohrungen aufweisen, die ein Lochraster zur Aufnahme von Sicherungselementen bildet.Furthermore, a wear plate of wear-resistant material can advantageously be applied via the tooth holder. The tooth tip can laterally have a plurality of bores, which forms a perforated grid for receiving securing elements.

Als Sicherungselemente können vorteilhaft Schwerspannstifte verwendet werden.As security elements can advantageously be used Schwubannstifte.

Zur Sicherung können allerdings auch Schraub- oder Klemmelemente, wie Keile, Spannzungen oder dergleichen verwendet werden.For securing, however, screw or clamping elements, such as wedges, clamping tongues or the like can be used.

Mit dem erfindungsgemäßen Grab- bzw. Greifwerkzeug erübrigt sich ein Abschneiden und Aufschweißen einer neuen Zahnspitze. Der Wechsel der Zahnspitze ist einfach und schnell durchzuführen. Die Lösung führt zu einer deutlichen Verlängerung der Regenerierungsintervalle. Das große Verschleißvolumen ist insbesondere wichtig beim Verladen von VA-Stählen. Insgesamt werden die Betriebskosten deutlich gesenkt. Als Zahnspitzen lassen sich hochverschleißfeste Stähle verwenden, da es hier aufgrund der erfindungsgemäßen Lösung nicht darauf ankommt, dass diese Stähle verschweißbar sein müssten.With the grave or gripping tool according to the invention, a cutting and welding a new tooth tip is unnecessary. The change of the tooth tip is easy and fast to perform. The solution leads to a significant extension of the regeneration intervals. The high wear volume is especially important when loading VA steels. Overall, the operating costs are significantly reduced. Highly wear-resistant steels can be used as tooth tips since, because of the solution according to the invention, it is not important here that these steels would have to be weldable.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der in der Zeichnung dargestellten vorteilhaften Ausführungsform der Erfindung. Es zeigen:

Figur 1:
eine Seitenansicht einer erfindungsgemäßen Greiferschale mit eingesetzter Zahnspitze,
Figur 2:
eine Draufsicht von vorne auf die Zahnspitze gemäß Figur 1,
Figur 3:
eine Schnittdarstellung entsprechend der Schnittlinie A-A gemäß Figur 2 und
Figur 4:
einen Schnitt entlang der Schnittlinie B-B gemäß Figur 1.
Further features, details and advantages of the invention will become apparent from the illustrated in the drawing advantageous embodiment of the invention. Show it:
FIG. 1:
a side view of a gripper bowl according to the invention with inserted tooth tip,
FIG. 2:
a plan view from the front on the tooth tip according to FIG. 1 .
FIG. 3:
a sectional view according to the section line AA according to FIG. 2 and
FIG. 4:
a section along the section line BB according to FIG. 1 ,

In Figur 1 ist eine bauübliche Greiferschale 10 gezeigt, deren Spitze abgelängt ist. Anstelle der abgelängten Spitze ist ein Zahnhalter 12 an die Greiferschale 10 geschweißt, der eine Aufnahmebohrung zur Aufnahme einer Zahnspitze 14 aufweist. Die Zahnspitze 14 besteht aus verschleißfestem Stahlguss.In FIG. 1 is a customary gripper shell 10 is shown, the tip is cut to length. Instead of the cut-to-length tip, a tooth holder 12 is welded to the gripper shell 10, which has a receiving bore for receiving a tooth tip 14. The tooth tip 14 is made of wear-resistant cast steel.

Die Formgebung der Zahnspitze ergibt sich insbesondere aus den Schnittdarstellungen gemäß der Figuren 3 und 4. Hier zeigt sich, dass die Zahnspitze eine Reihe von nebeneinander liegenden Bohrungen 16 aufweist, die ein Lochraster zur Aufnahme von Sicherungsstiften bilden. Die Sicherungsstifte 18 können, wie in Figur 4 dargestellt einerseits durch die Bohrungen in der Zahnspitze 14 und andererseits durch entsprechende Bohrungen im Zahnhalter 12 gesteckt werden. Vorzugsweise handelt es sich um sogenannte Connex-Schwerspannstifte. Im hier dargestellten Ausführungsbeispiel sind, wie in den Figuren 1, 3 und 4 dargestellt zwei nebeneinanderliegende Sicherungsstifte 18 vorgesehen.The shape of the tooth tip results in particular from the sectional views according to the FIGS. 3 and 4 , This shows that the tooth tip has a series of juxtaposed holes 16, which form a hole pattern for receiving locking pins. The locking pins 18 can, as in FIG. 4 shown on the one hand through the holes in the tooth tip 14 and on the other hand are inserted through corresponding holes in the tooth holder 12. Preferably, they are so-called Connex-Schwerstannstifte. In the embodiment shown here, as in the FIGS. 1 . 3 and 4 shown two adjacent locking pins 18 provided.

Ist die Zahnspitze 14 abgenutzt, können die Sicherungsstifte 18 entfernt werden und die Zahnspitze kann um ein Lochraster herausgezogen werden, so dass die Sicherungsstifte wieder eingeschlagen werden können.If the tooth tip 14 worn, the locking pins 18 can be removed and the tooth tip can be pulled out around a hole pattern, so that the locking pins can be taken again.

Um die Zahnspitze 14 austreiben können, weist diese an einem Ende treppenartig angeordnete Taschen 20 auf, die eine Art Treppenverzahnung bilden. Durch einen entsprechenden Durchbruch 22 im Zahnhalter 12 kann ein Werkzeug zum Austreiben der Zahnspitze in die Treppenverzahnung eingreifen. Mittels dieses hier nicht näher dargestellten Werkzeugs, das ähnlich einem Meißel gestaltet sein kann, und eines Hammers kann die Zahnspitze 14 ausgetrieben werden.In order to expel the tooth tip 14, this has at one end step-like arranged pockets 20, which form a kind of stair gearing. Through a corresponding opening 22 in the tooth holder 12, a tool for expelling the tooth tip can engage in the staircase toothing. By means of this tool, not shown here, which can be designed similar to a chisel, and a hammer, the tooth tip 14 can be expelled.

Über dem Zahnhalter 12 kann noch zusätzlich eine Verschleißplatte 24 Verwendung finden.Above the tooth holder 12, a wear plate 24 can additionally be used.

Claims (6)

  1. An excavating or gripping tool having a gripper shell, onto which at least one tooth tip (14) is set, wherein at least one tooth holder (12), in which the at least one tooth tip can be plugged in a manner guidable lengthwise and securable by securing elements (18), is arranged on the excavating or gripping tool,
    characterised in that
    the tooth tip (14) has a plurality of pockets (20) arranged in step manner on one side; and in that an opening (22) is provided at an appropriate position in the tooth holder (12) such that the pockets (20) are accessible from the outside.
  2. An excavating or gripping tool in accordance with claim 1, characterised in that that the tooth holder (12) and/or the tooth tip (.14) consists of wear-resistant material.
  3. An excavating or gripping tool in accordance with either of claims 1 or 2, characterised in that a wear plate (24) made of wear-resistant material is attached above the tooth holder (12).
  4. An excavating or gripping tool in accordance with one of the preceding claims, characterised in that the tooth tip (14) has a plurality of bores (16) on the side which form a perforated screen for the reception of securing elements 18).
  5. An excavating or gripping tool in accordance with claim 4, characterised in that heavy-duty spring pins are used as the securing elements.
  6. An excavating or gripping tool in accordance with one of the claims 1 to 4, characterised in that screw elements or clamp elements such as wedges, clamping tongues or the like are equally used for the securing.
EP04020450A 2003-10-29 2004-08-27 Excavating or gripping tool Not-in-force EP1528165B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10350540 2003-10-29
DE10350540A DE10350540A1 (en) 2003-10-29 2003-10-29 Grab or grab tool

Publications (2)

Publication Number Publication Date
EP1528165A1 EP1528165A1 (en) 2005-05-04
EP1528165B1 true EP1528165B1 (en) 2008-07-16

Family

ID=34399602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04020450A Not-in-force EP1528165B1 (en) 2003-10-29 2004-08-27 Excavating or gripping tool

Country Status (4)

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US (1) US20050097789A1 (en)
EP (1) EP1528165B1 (en)
AT (1) ATE401465T1 (en)
DE (2) DE10350540A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004003910U1 (en) * 2004-03-12 2005-07-21 Liebherr-Hydraulikbagger Gmbh gripping tool
AU2016211383B2 (en) 2015-01-28 2020-07-02 Esco Group Llc Mineral winning pick, holder, and combination
CN106759630B (en) * 2016-12-20 2018-12-25 泉州市蜀行者贸易有限公司 A kind of connection structure of excavator bucket teeth
CN106836367A (en) * 2016-12-30 2017-06-13 永平县建达鑫鑫合金铸造有限公司 A kind of die forging method of high intensity bucket tooth and its crown
CN107476373A (en) * 2017-08-16 2017-12-15 江苏洛克精密铸造有限公司 A kind of dredger trolley sawtooth casting

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US623645A (en) * 1899-04-25 Cultivator-tooth
US819390A (en) * 1904-06-16 1906-05-01 Thomas J Warren Plow.
GB103025A (en) * 1916-02-24 1917-01-11 Whitakers Engineers Ltd Improvements in or relating to the Digging Tools of Steam Navvy Buckets.
US1540314A (en) * 1924-06-19 1925-06-02 American Manganese Steel Co Pocketed bottom for excavating dippers
US2828558A (en) * 1956-01-27 1958-04-01 Richard B Reinhard Earth-moving equipment cutting edge construction
DE1290494B (en) * 1961-12-15 1969-03-06 Carl Falkenroth Soehne Grave tooth for loading or Schuerfkuebel of excavators or the like.
FR1454279A (en) * 1965-11-17 1966-07-22 Caterpillar Tractor Co Ground breaking instrument
US3550691A (en) * 1967-11-29 1970-12-29 Caterpillar Tractor Co Adjustable ripper tip
US3659654A (en) * 1967-11-29 1972-05-02 Caterpillar Tractor Co Adjustable ripper tip
US3536147A (en) * 1968-01-10 1970-10-27 Caterpillar Tractor Co Replaceable ripper tip assembly
US3601203A (en) * 1968-10-22 1971-08-24 Caterpillar Tractor Co Reversible ripper tip
US3755933A (en) * 1971-12-17 1973-09-04 E Lowrey Digger tooth and mounting therefor
JPS5026302A (en) * 1973-07-11 1975-03-19
US4899830A (en) * 1987-05-21 1990-02-13 Maguina Larco Alfredo Cutting tooth assembly for heavy duty earth working machines
JPH05311703A (en) * 1989-12-22 1993-11-22 Maginaararuko Alfred Holding clamp and cutting edge assembly

Also Published As

Publication number Publication date
ATE401465T1 (en) 2008-08-15
EP1528165A1 (en) 2005-05-04
US20050097789A1 (en) 2005-05-12
DE10350540A1 (en) 2005-06-09
DE502004007600D1 (en) 2008-08-28

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