EP0232468B1 - Cutter head tooth - Google Patents

Cutter head tooth Download PDF

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Publication number
EP0232468B1
EP0232468B1 EP86114597A EP86114597A EP0232468B1 EP 0232468 B1 EP0232468 B1 EP 0232468B1 EP 86114597 A EP86114597 A EP 86114597A EP 86114597 A EP86114597 A EP 86114597A EP 0232468 B1 EP0232468 B1 EP 0232468B1
Authority
EP
European Patent Office
Prior art keywords
tooth
cutter head
head tooth
cutting head
shaped
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
EP86114597A
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German (de)
French (fr)
Other versions
EP0232468A1 (en
Inventor
Otto Ehlert
Dieter Giersch
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.)
Hoesch AG
Original Assignee
Hoesch 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 Hoesch AG filed Critical Hoesch AG
Priority to AT86114597T priority Critical patent/ATE50305T1/en
Publication of EP0232468A1 publication Critical patent/EP0232468A1/en
Application granted granted Critical
Publication of EP0232468B1 publication Critical patent/EP0232468B1/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
    • 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
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements
    • 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
    • E02F9/2858—Teeth characterised by shape

Definitions

  • the invention relates to a pyramid-shaped cutting head tooth with a square cross section for a suction excavator.
  • Such cutting head teeth are used for dredging under water and are located as wear parts on rotating cutting heads on a boom of a suction dredger. They are used to loosen sand or rock and are therefore exposed to heavy wear.
  • Cutting head teeth are pyramid-shaped and preferably have a circular rectangular or square cross section. Such cutting head teeth are shown in DE-PS-2 841 523 and DE-OS-3 300 467. Furthermore, it is known to form excavator teeth for bucket excavators for reasons of strength or for heat treatment reasons. DE-AS-2 744 497 shows such an excavator tooth with an I-shaped cross section. Such an excavator tooth with an X-shaped cross-section is described on pages 96 to 99 of the "Zeitschrift für fertigung", volume 79/1984, volume 2.
  • a disadvantage of the known cutting head teeth is a very high thermal load on the tooth due to the strong cutting stress. This high thermal load leads to a reduced wear resistance of the material, which means that the cutting head tooth wears out faster.
  • the training according to excavator teeth for bucket excavators is therefore not suitable for the function as a cutting head tooth, because in this form of training there is no sufficient wear material.
  • trough-shaped depressions are arranged adjacent to the edges of the lateral surfaces of the cutting head tooth.
  • the channel-shaped depressions of each lateral surface converge to form a depression in the region of the tooth tip.
  • the outer surfaces of the pyramid shape are partially or completely curved outwards.
  • the advantages achieved by the invention are, in particular, that better cooling of the cutting head tooth is achieved by the trough-shaped depressions provided according to the invention and the service life of the material used and thus of the entire cutting head tooth is thereby increased.
  • the changed material distribution results in a better moment of resistance against bending on the cutting head tooth, which leads to a reduced material tension and additionally increases the service life of the cutting head tooth.
  • the loosened soil is better transported, which results in higher productivity.
  • a cutting head tooth 1 is pushed onto an adapter 2 and fixed by means of a securing element 3 (FIG. 1).
  • the adapter 2 is welded to the cutting head of a suction excavator, which is not shown.
  • the cutting head tooth 1 can be replaced as a wearing part in a simple manner.
  • the cutting head tooth 1 is pyramid-shaped and has a square cross section.
  • the lateral surfaces 4 of the pyramid-shaped outer contour are flat. However, they can also be wholly or partially curved slightly outwards (FIG. 4).
  • Trough-shaped depressions 6 are arranged adjacent to the edges 5 of the lateral surfaces 4 and run towards the tooth tip 7 in a V-shape. They converge into a depression 8 in the area of the tooth tip 7.
  • the lateral surfaces 4 are slightly curved outwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Sewing Machines And Sewing (AREA)
  • Knives (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Earth Drilling (AREA)

Abstract

1. Pyramid shaped cutter head tooth (1) with square cross-section for a suction dredger, characterised in that groove shaped indentations (6) are arranged bordering the edges (5) of the surfaces (4) of the cutter head tooth (1).

Description

Die Erfindung betrifft einen pyramidenförmigen Schneidkopfzahn mit einem quadratischen Querschnitt für einen Saugbagger.The invention relates to a pyramid-shaped cutting head tooth with a square cross section for a suction excavator.

Derartige Schneidkopfzähne werden beim Baggern unter Wasser eingesetzt und befinden sich als Verschleißteile auf drehenden Schneidköpfen an einem Ausleger eines Saugbaggerschiffes. Sie dienen zum Lösen von Sand oder Gestein und sind damit einem starken Verschleiß ausgesetzt.Such cutting head teeth are used for dredging under water and are located as wear parts on rotating cutting heads on a boom of a suction dredger. They are used to loosen sand or rock and are therefore exposed to heavy wear.

Schneidkopfzähne sind pyramidenförmig ausgebildet und haben vorzugsweise einen kreisförmigen rechteckigen oder quadratischen Querschnitt. Derartige Schneidkopfzähne zeigen die DE-PS-2 841 523 und die DE-OS-3 300 467. Weiterhin ist es bekannt, aus Festigkeitsgründen bzw. aus Wärmebehandlungsgründen Baggerzähne für Schaufelbagger profiliert auszubilden. Die DE-AS-2 744 497 zeigt einen derartigen Baggerzahn mit einem I-förmigen Querschnitt. In der "Zeitschrift für wirtschaftliche Fertigung", Jahrgang 79/1984, Heft 2, wird auf den Seiten 96 bis 99 ein derartiger Baggerzahn mit einem X-förmigen Querschnitt beschrieben.Cutting head teeth are pyramid-shaped and preferably have a circular rectangular or square cross section. Such cutting head teeth are shown in DE-PS-2 841 523 and DE-OS-3 300 467. Furthermore, it is known to form excavator teeth for bucket excavators for reasons of strength or for heat treatment reasons. DE-AS-2 744 497 shows such an excavator tooth with an I-shaped cross section. Such an excavator tooth with an X-shaped cross-section is described on pages 96 to 99 of the "Zeitschrift für Wirtschaftsfertigung", volume 79/1984, volume 2.

Nachteilig bei den bekannten Schneidkopfzähnen ergibt sich eine sehr hohe Wärmebelastung des Zahnes durch die starke schneidende Beanspruchung. Diese hohe Wärmebelastung führt zu einer reduzierten Verschleißfestigkeit des Materials, wodurch der Schneidkopfzahn schneller verschleißt. Bei Schneidkopfzähnen ist es üblich, ein großes Materialvolumen als Verschleißmaterial vorzusehen, um die Zähne solange wie möglich im Eingriff behalten zu können und die Zahnwechselzeiten, die jeweils mit einem Auftauchen der Schneidköpfe aus dem Wasser verbunden sind, zu reduzieren. Die Ausbildung entsprechend Baggerzähnen für Schaufelbagger ist daher für die Funktion als Schneidkopfzahn nicht geeignet, weil bei dieser Ausbildungsform kein ausreichendes Verschleißmaterial angeordnet ist.A disadvantage of the known cutting head teeth is a very high thermal load on the tooth due to the strong cutting stress. This high thermal load leads to a reduced wear resistance of the material, which means that the cutting head tooth wears out faster. In the case of cutting head teeth, it is common to provide a large volume of material as wear material in order to be able to keep the teeth in contact as long as possible and to reduce the tooth change times which are associated with the cutting heads emerging from the water. The training according to excavator teeth for bucket excavators is therefore not suitable for the function as a cutting head tooth, because in this form of training there is no sufficient wear material.

Von daher liegt der Erfindung die Aufgabe zugrunde, die Standzeit von Schneidkopfzähnen für Saugbagger bei gleichbleibendem Einsatz von Verschleißmaterial zu erhöhen.The invention is therefore based on the object of increasing the service life of cutting head teeth for suction excavators with the same use of wear material.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß rinnenförmige Vertiefungen angrenzend an die Kanten der Mantelflächen des Schneidkopfzahnes angeordnet sind.This object is achieved in that trough-shaped depressions are arranged adjacent to the edges of the lateral surfaces of the cutting head tooth.

In vorteilhafter Ausbildung laufen die rinnenförmigen Vertiefungen jeder Mantelfläche im Bereich der Zahnspitze zu einer Vertiefung zusammen. Um zusätzliches Verschleißmaterial unterzubringen, ist in einer weiteren Ausbildung vorgesehen, daß die Mantelflächen der Pyramidenform ganz oder teilweise geringfügig nach außen gewölbt ausgebildet sind.In an advantageous embodiment, the channel-shaped depressions of each lateral surface converge to form a depression in the region of the tooth tip. In order to accommodate additional wear material, it is provided in a further embodiment that the outer surfaces of the pyramid shape are partially or completely curved outwards.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß durch die erfindungsgemäß vorgesehenen rinnenförmigen Vertiefungen eine bessere Kühlung des Schneidkopfzahns erzielt wird und dadurch die Standzeit des eingesetzten Materials und somit des gesamten Schneidkopfzahns erhöht wird. Darüber hinaus ergibt sich durch die geänderte Materialverteilung ein besseres Widerstandsmoment gegen Biegung am Schneidkopfzahn, was zu einer reduzierten Materialspannung führt und zusätzlich die Standzeit des Schneidkopfzahns erhöht. Weiterhin erfolgt durch die rinnenförmige Ausbildung der Schneidkopfzähne angrenzend an die Kanten der Mantelflächen ein besserer Transport des gelösten Bodens, wordurch sich eine höhere Produktivität ergibt.The advantages achieved by the invention are, in particular, that better cooling of the cutting head tooth is achieved by the trough-shaped depressions provided according to the invention and the service life of the material used and thus of the entire cutting head tooth is thereby increased. In addition, the changed material distribution results in a better moment of resistance against bending on the cutting head tooth, which leads to a reduced material tension and additionally increases the service life of the cutting head tooth. Furthermore, due to the groove-shaped design of the cutting head teeth adjacent to the edges of the lateral surfaces, the loosened soil is better transported, which results in higher productivity.

Anhand der Zeichnung wird ein Ausführungsbeispiel der Erfindung erläutert.An embodiment of the invention will be explained with reference to the drawing.

Es zeigen

  • Fig. 1 einen Schneidkopfzahn mit Halterung in Ansicht,
  • Fig. 2 eine Draufsicht auf die Spitze des Schneidkopfzahns nach Fig. 1,
  • Fig. 3 einen Schnitt nach der Linie 111 - 111 in Fig. 1,
  • Fig. 4 einen Schnitt nach der Linie IV - IV in Fig. 1.
Show it
  • 1 is a cutting head tooth with bracket in view,
  • 2 is a plan view of the tip of the cutting head tooth of FIG. 1,
  • 3 shows a section along the line 111-111 in FIG. 1,
  • 4 shows a section along the line IV-IV in FIG. 1.

Wie aus der Zeichnung hervorgeht, ist ein Schneidkopfzahn 1 auf einen Adapter 2 aufgeschoben und mittels eines Sicherungselementes 3 fixiert (Fig. 1). Der Adapter 2 ist auf dem Schneidkopf eines Saugbaggers verschweißt, was nicht dargestellt ist. Dadurch ist jeweils der Schneidkopfzahn 1 als Verschleißteil in einfacher Weise auszuwechseln. Der Schneidkopfzahn 1 ist pyramidenförmig ausgebildet und besitzt einen quadratischen Querschnitt. Die Mantelflächen 4 der pyramidenförmigen Außenkontur sind eben ausgebildet. Sie können jedoch auch ganz oder teilweise geringfügig nach außen gewölbt ausgebildet sein (Fig. 4). Angrenzend an die Kanten 5 der Mantelflächen 4 sind rinnenförmige Vertiefungen 6 angeordnet, die V-förmig auf die Zahnspitze 7 zulaufen. Sie laufen im Bereich der Zahnspitze 7 zu einer Vertiefung 8 zusammen. Im Querschnittsbereich gemäß Fig. 4 sind die Mantelflächen 4 geringfügig nach außen gewölbt ausgebildet.

Figure imgb0001
As can be seen from the drawing, a cutting head tooth 1 is pushed onto an adapter 2 and fixed by means of a securing element 3 (FIG. 1). The adapter 2 is welded to the cutting head of a suction excavator, which is not shown. As a result, the cutting head tooth 1 can be replaced as a wearing part in a simple manner. The cutting head tooth 1 is pyramid-shaped and has a square cross section. The lateral surfaces 4 of the pyramid-shaped outer contour are flat. However, they can also be wholly or partially curved slightly outwards (FIG. 4). Trough-shaped depressions 6 are arranged adjacent to the edges 5 of the lateral surfaces 4 and run towards the tooth tip 7 in a V-shape. They converge into a depression 8 in the area of the tooth tip 7. In the cross-sectional area according to FIG. 4, the lateral surfaces 4 are slightly curved outwards.
Figure imgb0001

Claims (3)

1. Pyramid shaped cutter head tooth (1) with square cross-section for a suction dredger, characterised in that groove shaped indentations (6) are arranged bordering the edges (5) of the surfaces (4) of the cutter head tooth (1).
2. Cutter head tooth as in claim 1, characterised in that the grooved shaped indentations (6) of each surface (4) diverge to one indentation (8) in the area of the tip of the tooth (7).
3. Cutter head tooth as in claim 1 and 2, characterised in that the whole or part of the surfaces (4) of the pyramid shape is of a slightly convex design.
EP86114597A 1985-12-19 1986-10-21 Cutter head tooth Expired - Lifetime EP0232468B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86114597T ATE50305T1 (en) 1985-12-19 1986-10-21 CUTTERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545018 1985-12-19
DE3545018A DE3545018C1 (en) 1985-12-19 1985-12-19 Cutting tooth

Publications (2)

Publication Number Publication Date
EP0232468A1 EP0232468A1 (en) 1987-08-19
EP0232468B1 true EP0232468B1 (en) 1990-02-07

Family

ID=6288911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114597A Expired - Lifetime EP0232468B1 (en) 1985-12-19 1986-10-21 Cutter head tooth

Country Status (6)

Country Link
EP (1) EP0232468B1 (en)
JP (1) JPS62146329A (en)
AT (1) ATE50305T1 (en)
DE (2) DE3545018C1 (en)
ES (1) ES2013702B3 (en)
GR (1) GR3000458T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531787C1 (en) * 1985-09-06 1986-06-26 Berchem & Schaberg Gmbh, 4650 Gelsenkirchen Interchangeable tooth for a digging and breaking tool with hard metal tip and edge reinforcement
BE1004793A3 (en) * 1991-05-07 1993-02-02 Magotteaux Int Tooth/Tooth-holder unit for drill heads
US5314029A (en) * 1992-06-15 1994-05-24 Kennametal Inc. Pyramidal shaped, hardened insert for an agricultural tool
US8191291B2 (en) * 2008-07-09 2012-06-05 Esco Corporation Wear member for excavating equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1009254A (en) * 1911-06-08 1911-11-21 Charles L Mckenzie Dipper construction.
US4028823A (en) * 1975-10-31 1977-06-14 Edwards Gerald D Digging tooth
DE2841523C2 (en) * 1978-09-23 1982-06-09 Berchem & Schaberg Gmbh, 4650 Gelsenkirchen Tool set consisting of tooth and adapter for the suction head of suction head excavators
DE3300467C2 (en) * 1983-01-08 1986-01-23 Berchem & Schaberg Gmbh, 4650 Gelsenkirchen Adapter for attaching a cutting tooth to the suction head of a suction head excavator

Also Published As

Publication number Publication date
DE3668930D1 (en) 1990-03-15
DE3545018C1 (en) 1986-08-28
EP0232468A1 (en) 1987-08-19
ES2013702B3 (en) 1990-06-01
GR3000458T3 (en) 1991-06-28
ATE50305T1 (en) 1990-02-15
JPS62146329A (en) 1987-06-30
JPH0436219B2 (en) 1992-06-15

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