EP1223302B1 - Cutting tooth arrangement - Google Patents

Cutting tooth arrangement Download PDF

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Publication number
EP1223302B1
EP1223302B1 EP01127951A EP01127951A EP1223302B1 EP 1223302 B1 EP1223302 B1 EP 1223302B1 EP 01127951 A EP01127951 A EP 01127951A EP 01127951 A EP01127951 A EP 01127951A EP 1223302 B1 EP1223302 B1 EP 1223302B1
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EP
European Patent Office
Prior art keywords
tooth
cutting tooth
arrangement according
cutting
shank
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Expired - Lifetime
Application number
EP01127951A
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German (de)
French (fr)
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EP1223302A3 (en
EP1223302A2 (en
Inventor
Werner Harthauser
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Bauer Maschinen GmbH
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Bauer Maschinen GmbH
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Application filed by Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Priority to DE50101470.5T priority Critical patent/DE50101470C5/en
Publication of EP1223302A2 publication Critical patent/EP1223302A2/en
Publication of EP1223302A3 publication Critical patent/EP1223302A3/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable

Definitions

  • the invention relates to a cutting tooth arrangement for a Earth working tool with a cutting tooth, which one Has tooth head and a tooth shaft, and a bracket with insertion opening, in which the tooth shaft in an insertion direction is insertable, being inserted in an Position of the tooth shaft in the holder by means of a cross to the insertion direction arranged mounting pin detachable is supported.
  • a generic cutting tooth arrangement is an example from DE 40 02 907 A1.
  • This known arrangement becomes a tooth shaft in a pocket-shaped receiving space plugged into a drill bit, so that both the narrow and broad sides of the tooth shaft from Recording surfaces of the receiving pocket are surrounded.
  • a detachable Bracket with these known teeth order is through reached a fastening pin, which is approximately in the middle arranged on a broad side of the cuboid tooth shaft is and both the side surfaces of the receiving pocket as also penetrates a central area of the tooth shaft.
  • an earth-working machine in the sense of the invention it is, for example, a drilling device, a milling wheel or a milling chain that is used in civil engineering when creating of bores or in the manufacture of diaphragm walls be used.
  • the invention has for its object to provide a cutting tooth arrangement for a earthworking in which a wear when Erdbearbeitung and the burden it entails is further reduced to the maintenance of the earthworking implement.
  • the invention is achieved by a cutting tooth arrangement with the Features of claim 1 solved.
  • the bracket is fork-shaped with two holding arms that the Holding arms each have a system side, which on Narrow sides of the tooth shaft rest against the contact sides and the narrow sides to form a positive connection are provided with a profile transverse to the direction of insertion, and that on the system side at least one holding arm and on the corresponding narrow side of the tooth shaft in each case a recess is provided which is inserted in the Position together a passage for the mounting pin form.
  • the tooth shaft of a cutting tooth no longer overleaf, but taken up by two holding arms.
  • the roughly cuboid or tongue-shaped tooth shaft is only held on the narrow sides, so that the fork or U-shaped bracket a relatively small Surface that is subject to wear.
  • a particularly good attachment is thereby according to the invention achieved that on both investment sides and on both Narrow sides each have a recess and that the tooth shaft on both sides with two fastening pins is supported.
  • further fastening pins in the edge areas to provide the tooth shaft then also corresponding Number of recesses in the holding arms and Narrow sides of the tooth shaft are to be provided.
  • the positive connection between the plant side and the narrow side through a rear grip bar is formed.
  • a projecting ledge along the plant side is formed, which in a correspondingly trained Groove engages on the narrow side of the tooth shaft.
  • the flanks of the toothed shaft cover the projecting one in a manner Mold on the holding arms and protect them from Wear.
  • the holding arms can be separated from each other trained and on a corresponding body of the Earth working device attached, especially welded become.
  • a particularly simple and robust design is achieved according to the invention in that the holding arms in their foot area facing away from the insertion opening are connected to each other via a transverse yoke.
  • the holding arms can be formed in one piece.
  • the transverse yoke and the side surface that comes into contact with it the tooth shaft are also profiled. It can be a particularly safe and reliable positive connection between the bracket and the tooth shaft can be achieved.
  • the profile for the form fit between the holding arms and the tooth shaft can be sufficient known guides, such as a dovetail guide or a semicircular guide can be used.
  • a particularly robust and at the same time easy to manufacture design is achieved according to the invention in that the profiled contact side and the profiled narrow side a rectangular guide is formed.
  • a preferred embodiment of the invention continues in that a broad side of the tooth shaft, which in the inserted position facing away from the earth drilling rig and is facing the floor, protrudes from the bracket. Because not only wear on the tooth cutting edge during earth working, but overall on all facing the ground Surface occurs, the bracket is additionally by the protruding tooth shaft protected. That is, wear occurs increasingly on the tooth shaft while the bracket with the holding arms a significantly reduced wear is subject. Wear on the tooth shaft is less from an economic point of view critical since the tooth shaft is in any case with the tooth head must be replaced at relatively short intervals.
  • a holder 30 From the front view of a holder 30 according to the invention 1a shows the fork-shaped structure, which comprises two approximately parallel holding arms 34, which in its foot area with a semicircular Cross yoke 42 connected to one another and formed in one piece are.
  • the holding arms 34 are mirror-symmetrical to one another trained and only include a space on the side, in which a free side, insertion opening 32nd called, a cutting tooth in the direction of arrow B inserted is.
  • the Holding arms 34 On their mutually facing plant sides 36, the Holding arms 34 a bar 40 with a rectangular cross section, which is arranged approximately in the middle on the plant side 36 and extends over the two holding arms 34 and the transverse yoke 42. In the bar 40 are approximately in the middle of the Semi-circular recesses 38 are introduced, which for the partial inclusion of a fastening pin serve.
  • the strip 40 points to form a rectangular guide in the Cross-section an approximately rectangular or square Cross section on. This is in particular from FIG. 1b, which a cross-sectional view according to section A-A and 1d, which is a cross-sectional view according to section B-B.
  • Figure 1a shows the side of the bracket 30, which for attachment provided on a base body of an earth drilling device is.
  • the outside of the holder 30 has a sloping underside 43, to which in protected Arrangement of a weld seam can be provided can.
  • At the free ends of the holding arms 34 there is also one Chamfer 48 provided, which in any case for the simplified Attaching the bracket to a base body of the earth-working machine serves.
  • FIG. 2a An underside of a facing the earth-working machine Cutting tooth 10 according to the invention is shown in FIG. 2a.
  • the approximately cuboid cutting tooth 10 has a cutting head 12 and an approximately tongue-shaped Tooth shaft 14 on.
  • FIG. 12 As from the side view according to Figure 2b and the top view 2d can be clearly seen from FIG Cutting head 12 a receiving device for pin-shaped Cutting devices 26 are provided.
  • FIG. 3a shows the inner broad side of the cutting tooth arrangement according to the invention 1, which in operation is the base body of the earth-working machine is facing.
  • the toothed shaft is in the assembled, inserted position 14 of the cutting tooth 10 only laterally from the holding arms 34 of the holding device 30 comprises.
  • the Broad sides of the cutting tooth 10 are thus exposed, whereby however, one side through the base body of the not shown Soil cultivation equipment is covered.
  • Inserting the cutting tooth 10 in the insertion direction P in the Bracket 30 is not fixed in position by means of illustrated fastening pins 5.
  • the fastening pins 5 are inserted into passages 3, which through the recesses 18 on the cutting tooth 10 and the semicircular Recesses 38 in the edge region of the contact sides 36 of the holding arms 34 are formed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Shovels (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Magnetic Heads (AREA)
  • Shearing Machines (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)

Abstract

Cutting arrangement has a fork-like holder (30) with two holding arms (34). The arms each have a stop side (36) which lie on narrow sides of a tooth shaft. The stop sides and the narrow sides form an interlock across the insertion direction with a profile. A recess (38) is provided on the stop side of one holding arm and on the narrow side of the tooth shaft. The recess forms a through-hole for a fixing pin. Preferred Features: The tooth shaft is held on both sides with two fixing pins.

Description

Die Erfindung betrifft eine Schneidzahnanordnung für ein Erdbearbeitungsgerät mit einem Schneidzahn, welcher einen Zahnkopf und einen Zahnschaft aufweist, und eine Halterung mit Einstecköffnung, in welche der Zahnschaft in eine Einsteckrichtung einsteckbar ist, wobei in einer eingesteckten Position der Zahnschaft in der Halterung mittels einem quer zur Einsteckrichtung angeordneten Befestigungsstift lösbar gehaltert ist.The invention relates to a cutting tooth arrangement for a Earth working tool with a cutting tooth, which one Has tooth head and a tooth shaft, and a bracket with insertion opening, in which the tooth shaft in an insertion direction is insertable, being inserted in an Position of the tooth shaft in the holder by means of a cross to the insertion direction arranged mounting pin detachable is supported.

Eine gattungsgemäße Schneidzahnanordnung geht beispielsweise aus der DE 40 02 907 A1 hervor. Bei dieser bekannten Anordnung wird ein Zahnschaft in einen taschenförmigen Aufnahmeraum an einer Bohrkrone eingesteckt, so dass sowohl die Schmal- als auch die Breitseiten des Zahnschaftes von Aufnahmeflächen der Aufnahmetasche umgeben sind. Eine lösbare Halterung bei diesen bekannten Zahnordnung wird durch einen Befestigungsstift erreicht, welcher etwa mittig an einer Breitseite des quaderförmigen Zahnschaftes angeordnet ist und sowohl die Seitenflächen der Aufnahmetasche als auch einen Mittenbereich des Zahnschaftes durchdringt.A generic cutting tooth arrangement is an example from DE 40 02 907 A1. In this known arrangement becomes a tooth shaft in a pocket-shaped receiving space plugged into a drill bit, so that both the narrow and broad sides of the tooth shaft from Recording surfaces of the receiving pocket are surrounded. A detachable Bracket with these known teeth order is through reached a fastening pin, which is approximately in the middle arranged on a broad side of the cuboid tooth shaft is and both the side surfaces of the receiving pocket as also penetrates a central area of the tooth shaft.

Beim Abtragen von Boden durch Bohren oder Fräsen tritt erheblicher Verschleiß an den Zähnen auf. Mit der bekannten Vorrichtung kann zwar der Zahn relativ leicht gewechselt werden. Allerdings ist auch die Aufnahmetasche zum Haltern des Zahnes erheblichem Verschleiß ausgesetzt. Bei der bekannten Vorrichtung ist es in diesem Falle erforderlich, die gesamte Aufnahmetasche oder zumindest einzelne Wände abzutragen und auszuwechseln.When removing soil by drilling or milling occurs more significantly Wear on the teeth. With the known Device can change the tooth relatively easily become. However, the holder is also a holder exposed to considerable wear on the tooth. With the known Device in this case it is necessary the entire pocket or at least individual walls to remove and replace.

Bei einem Erdbearbeitungsgerät im Sinne der Erfindung kann es sich beispielsweise um eine Bohrvorrichtung, ein Fräsrad oder um eine Fräskette handeln, welche im Tiefbau beim Erstellen von Bohrungen bzw. bei der Herstellung von Schlitzwänden eingesetzt werden.In the case of an earth-working machine in the sense of the invention it is, for example, a drilling device, a milling wheel or a milling chain that is used in civil engineering when creating of bores or in the manufacture of diaphragm walls be used.

Der Erfindung liegt die Aufgabe zugrunde, eine Schneidzahnanordnung für ein Erdbearbeitungsgerät zu schaffen, bei welchem ein Verschleiß bei der Erdbearbeitung und der damit verbundene Aufwand zur Instandhaltung des Erdbearbeitungsgerätes weiter reduziert ist.The invention has for its object to provide a cutting tooth arrangement for a earthworking in which a wear when Erdbearbeitung and the burden it entails is further reduced to the maintenance of the earthworking implement.

Die Erfindung wird durch eine Schneidzahnanordnung mit den Merkmalen des Anspruchs 1 gelöst.The invention is achieved by a cutting tooth arrangement with the Features of claim 1 solved.

Nach der Erfindung ist es vorgesehen, dass die Halterung gabelförmig mit zwei Haltearmen ausgebildet ist, dass die Haltearme jeweils eine Anlageseite aufweisen, welche an Schmalseiten des Zahnschaftes anliegen, dass die Anlageseiten und die Schmalseiten zur Bildung eines Formschlusses quer zur Einsteckrichtung mit einem Profil versehen sind, und dass an der Anlageseite zumindest eines Haltearmes und an der zugehörenden Schmalseite des Zahnschaftes jeweils eine Ausnehmung vorgesehen ist, welche in der eingesteckten Position gemeinsam einen Durchgang für den Befestigungsstift bilden.According to the invention it is provided that the bracket is fork-shaped with two holding arms that the Holding arms each have a system side, which on Narrow sides of the tooth shaft rest against the contact sides and the narrow sides to form a positive connection are provided with a profile transverse to the direction of insertion, and that on the system side at least one holding arm and on the corresponding narrow side of the tooth shaft in each case a recess is provided which is inserted in the Position together a passage for the mounting pin form.

Gemäß der Erfindung wird der Zahnschaft eines Schneidzahnes nicht mehr umseitig, sondern durch zwei Haltearme aufgenommen. Der etwa quaderförmige oder zungenförmige Zahnschaft wird dabei lediglich an den Schmalseiten gehalten, so dass die gabel- oder U-förmige Halterung eine relativ geringe Oberfläche aufweist, die einem Verschleiß unterworfen ist.According to the invention, the tooth shaft of a cutting tooth no longer overleaf, but taken up by two holding arms. The roughly cuboid or tongue-shaped tooth shaft is only held on the narrow sides, so that the fork or U-shaped bracket a relatively small Surface that is subject to wear.

Eine gleichwohl gute Halterung wird nach der Erfindung dadurch erzielt, dass zwischen den Anlageflächen der Halterung einerseits und des Zahnschaftes andererseits ein Formschluss quer zur Einsteckrichtung gebildet ist. Es ist also weiter ein einfaches Einstecken des Zahnschaftes in die Halterung möglich, wobei jedoch gleichzeitig durch die Profilierung an den Anlageflächen eine Führung in Querrichtung und damit eine Entlastung des Befestigungsstiftes erreicht wird. Der Befestigungsstift wird im Randbereich des Zahnschaftes angeordnet, so dass dieser entsprechend vorgesehenen Ausnehmungen zumindest teilweise den Zahnschaft und teilweise den Haltearm durchdringt. Es wird so insgesamt eine zuverlässige Befestigung des Schneidzahnes in der gabelförmigen Halterung durch den Befestigungsstift erzielt.An nevertheless good holder is thereby according to the invention achieved that between the contact surfaces of the bracket on the one hand and the tooth shaft on the other hand a form fit is formed transversely to the direction of insertion. So it is further simply inserting the tooth shaft into the Bracket possible, but at the same time through the profiling a guide in the transverse direction on the contact surfaces and thus relieved the mounting pin becomes. The fastening pin is in the edge area of the tooth shaft arranged so that it is provided accordingly Recesses at least partially the tooth shaft and partially penetrates the holding arm. It will be so overall a reliable attachment of the cutting tooth in the fork-shaped Bracket achieved by the mounting pin.

Eine besonders gute Befestigung wird nach der Erfindung dadurch erreicht, dass an beiden Anlageseiten und an beiden Schmalseiten jeweils eine Ausnehmung vorgesehen ist und dass der Zahnschaft beidseitig mit zwei Befestigungsstiften gehaltert ist. Bei größeren Belastungsfällen ist es auch möglich, noch weitere Befestigungsstifte in den Randbereichen des Zahnschaftes vorzusehen, wobei dann auch entsprechende Anzahlen von Ausnehmungen in den Haltearmen und den Schmalseiten des Zahnschaftes vorzusehen sind.A particularly good attachment is thereby according to the invention achieved that on both investment sides and on both Narrow sides each have a recess and that the tooth shaft on both sides with two fastening pins is supported. With larger stress cases it is also possible, further fastening pins in the edge areas to provide the tooth shaft, then also corresponding Number of recesses in the holding arms and Narrow sides of the tooth shaft are to be provided.

Für einen einfachen und zuverlässigen Formschluss ist es nach der Erfindung vorgesehen, dass der Formschluss zwischen der Anlageseite und der Schmalseite durch eine Hintergriffleiste gebildet ist. Insbesondere ist es bevorzugt, dass entlang der Anlageseite eine vorspringende Leiste ausgebildet ist, welche in eine entsprechend ausgebildete Nut an der Schmalseite des Zahnschaftes eingreift. Auf diese Weise überdecken die Flanken des Zahnschaftes die vorspringende Leiste an den Haltearmen und schützen diese vor Verschleiß.It is for a simple and reliable form fit provided according to the invention that the positive connection between the plant side and the narrow side through a rear grip bar is formed. In particular, it is preferred that a projecting ledge along the plant side is formed, which in a correspondingly trained Groove engages on the narrow side of the tooth shaft. To this The flanks of the toothed shaft cover the projecting one in a manner Mold on the holding arms and protect them from Wear.

Grundsätzlich können die Haltearme getrennt voneinander ausgebildet und an einem entsprechenden Grundkörper des Erdbearbeitungsgerätes befestigt, insbesondere angeschweißt werden. Eine besonders einfache und robuste Ausgestaltung wird erfindungsgemäß jedoch dadurch erreicht, dass die Haltearme in ihrem von der Einstecköffnung abgewandten Fußbereich über ein Querjoch miteinander verbunden sind. Insbesondere können die Haltearme so einstückig ausgebildet werden.Basically, the holding arms can be separated from each other trained and on a corresponding body of the Earth working device attached, especially welded become. A particularly simple and robust design is achieved according to the invention in that the holding arms in their foot area facing away from the insertion opening are connected to each other via a transverse yoke. In particular the holding arms can be formed in one piece.

Dabei ist es nach der Erfindung besonders bevorzugt, dass das Querjoch und die daran zur Anlage kommende Seitenfläche des Zahnschaftes ebenfalls profiliert ausgebildet sind. Es kann so eine besonders sichere und zuverlässige Formschlussverbindung zwischen der Halterung und dem Zahnschaft erreicht werden.It is particularly preferred according to the invention that the transverse yoke and the side surface that comes into contact with it the tooth shaft are also profiled. It can be a particularly safe and reliable positive connection between the bracket and the tooth shaft can be achieved.

Zur Ausgestaltung der Profilierung für den Formschluss zwischen den Haltearmen und dem Zahnschaft können hinlänglich bekannte Führungen, etwa eine Schwalbenschwanzführung oder eine Halbrundführung eingesetzt werden. Eine besonders robuste und zugleich einfach herzustellende Ausgestaltung wird nach der Erfindung jedoch dadurch erreicht, dass durch die profilierte Anlageseite und die profilierte Schmalseite eine Rechteckführung gebildet ist. To design the profile for the form fit between the holding arms and the tooth shaft can be sufficient known guides, such as a dovetail guide or a semicircular guide can be used. A particularly robust and at the same time easy to manufacture design is achieved according to the invention in that the profiled contact side and the profiled narrow side a rectangular guide is formed.

Eine bevorzugte Ausführungsform der Erfindung besteht weiter darin, dass eine Breitseite des Zahnschaftes, welche in der eingesteckten Position vom Erdbohrgerät abgewandt und dem Boden zugewandt ist, gegenüber der Halterung vorsteht. Da bei der Erdbearbeitung nicht nur Verschleiß an der Zahnschneide, sondern insgesamt an allen dem Boden zugewandten Flächen auftritt, wird die Halterung zusätzlich durch den vorstehenden Zahnschaft geschützt. Das heißt, ein Verschleiß tritt verstärkt am Zahnschaft auf, während die Halterung mit den Haltearmen einem deutlich verringerten Verschleiß unterworfen ist. Der Verschleiß an dem Zahnschaft ist dabei unter wirtschaftlichen Gesichtspunkten weniger kritisch, da der Zahnschaft in jedem Fall mit dem Zahnkopf in relativ kurzen Abständen ausgewechselt werden muss.A preferred embodiment of the invention continues in that a broad side of the tooth shaft, which in the inserted position facing away from the earth drilling rig and is facing the floor, protrudes from the bracket. Because not only wear on the tooth cutting edge during earth working, but overall on all facing the ground Surface occurs, the bracket is additionally by the protruding tooth shaft protected. That is, wear occurs increasingly on the tooth shaft while the bracket with the holding arms a significantly reduced wear is subject. Wear on the tooth shaft is less from an economic point of view critical since the tooth shaft is in any case with the tooth head must be replaced at relatively short intervals.

Eine weitere Ersparnis der durch den Verschleiß verursachten Kosten wird erfindungsgemäß dadurch erreicht, dass an der dem Erdbearbeitungsgerät abgewandten Breitseite eine Erhebung mit verschleißmindernden Elementen angeordnet ist. Diese Anordnung ist verschleißarm, wobei die Elemente leicht ausgewechselt werden können. Ein Verschleiß tritt so lediglich an einem relativ kleinen und speziell dafür vorgesehenen Teil des Zahnschaftes auf. Als verschleißfestes Material für die Elemente am Zahnschaft können die Materialien eingesetzt werden, aus welchen auch die auswechselbaren Schneidstifte am Zahnkopf hergestellt sind.Another saving of those caused by wear According to the invention, costs are achieved in that the broadside facing away from the earth-working machine Elevation with wear-reducing elements is arranged. This arrangement is low wear, the elements being light can be replaced. Wear only occurs on a relatively small and specially designed Part of the tooth shaft. As a wear-resistant material for the elements on the tooth shaft, the materials are used, from which also the interchangeable Cutting pins are made on the tooth head.

Ein schnelles Wechseln eines Schneidzahnes wird dadurch erfindungsgemäß verbessert, dass im Bereich der Einstecköffnung die Haltearme angefast und/oder in ihrem Abstand zueinander erweitert sind. Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispieles weiter erläutert, welches schematisch in den Zeichnungen dargestellt ist. In den Zeichnungen zeigen

Figur 1
eine Halterung nach der Erfindung in verschiedenen Ansichten;
Figur 2
einen Schneidzahn nach der Erfindung in verschiedenen Ansichten; und
Figur 3
die montierte erfindungsgemäße Schneidzahnanordnung mit der Halterung von Figur 1 und dem Schneidzahn von Figur 2.
A quick change of a cutting tooth is improved according to the invention in that the holding arms are chamfered in the region of the insertion opening and / or their distance from one another is widened. The invention is explained in more detail below with the aid of a preferred exemplary embodiment, which is shown schematically in the drawings. Show in the drawings
Figure 1
a holder according to the invention in different views;
Figure 2
a cutting tooth according to the invention in different views; and
Figure 3
the assembled cutting tooth arrangement according to the invention with the holder from FIG. 1 and the cutting tooth from FIG. 2.

Aus der Vorderansicht einer erfindungsgemäßen Halterung 30 nach Figur 1a ist der gabelförmige Aufbau zu erkennen, welcher zwei etwa parallel verlaufende Haltearme 34 umfasst, welche in ihrem Fußbereich mit einem halbkreisringförmigen Querjoch 42 miteinander verbunden und einstückig ausgebildet sind. Die Haltearme 34 sind spiegelsymmetrisch zu einander ausgebildet und umfassen lediglich seitlich einen Freiraum, in welchen über eine freie Seite, Einstecköffnung 32 genannt, ein Schneidzahn in Richtung des Pfeiles B einsteckbar ist.From the front view of a holder 30 according to the invention 1a shows the fork-shaped structure, which comprises two approximately parallel holding arms 34, which in its foot area with a semicircular Cross yoke 42 connected to one another and formed in one piece are. The holding arms 34 are mirror-symmetrical to one another trained and only include a space on the side, in which a free side, insertion opening 32nd called, a cutting tooth in the direction of arrow B inserted is.

An ihren zu einander gewandten Anlageseiten 36 weisen die Haltearme 34 eine im Querschnitt rechteckige Leiste 40 auf, welche etwa mittig an der Anlageseite 36 angeordnet ist und sich über die beiden Haltearme 34 und das Querjoch 42 erstreckt. In der Leiste 40 sind etwa mittig im Bereich der Haltearme halbkreisförmige Ausnehmungen 38 eingebracht, welche zur teilweisen Aufnahme eines Befestigungsstiftes dienen.On their mutually facing plant sides 36, the Holding arms 34 a bar 40 with a rectangular cross section, which is arranged approximately in the middle on the plant side 36 and extends over the two holding arms 34 and the transverse yoke 42. In the bar 40 are approximately in the middle of the Semi-circular recesses 38 are introduced, which for the partial inclusion of a fastening pin serve.

Die Leiste 40 weist zur Bildung einer Rechteckführung im Querschnitt einen etwa rechteckigen oder quadratischen Querschnitt auf. Dies ist insbesondere aus Figur 1b, welche eine Querschnittsansicht gemäß dem Schnitt A-A darstellt und der Figur 1d zu ersehen, welche eine Querschnittsansicht gemäß dem Schnitt B-B darstellt.The strip 40 points to form a rectangular guide in the Cross-section an approximately rectangular or square Cross section on. This is in particular from FIG. 1b, which a cross-sectional view according to section A-A and 1d, which is a cross-sectional view according to section B-B.

Figur 1a zeigt die Seite der Halterung 30, welche zur Befestigung an einem Grundkörper eines Erdbohrgerätes vorgesehen ist. Hierfür weist die Außenseite der Halterung 30 eine schräg verlaufende Unterseite 43 auf, an welche in geschützter Anordnung eine Schweißnaht vorgesehen werden kann. An den freien Enden der Haltearme 34 ist weiter eine Anfasung 48 vorgesehen, welche jedenfalls zur vereinfachten Anbringung der Halterung an einem Grundkörper des Erdbearbeitungsgerätes dient.Figure 1a shows the side of the bracket 30, which for attachment provided on a base body of an earth drilling device is. For this purpose, the outside of the holder 30 has a sloping underside 43, to which in protected Arrangement of a weld seam can be provided can. At the free ends of the holding arms 34 there is also one Chamfer 48 provided, which in any case for the simplified Attaching the bracket to a base body of the earth-working machine serves.

Eine zum Erdbearbeitungsgerät gerichtete Unterseite eines erfindungsgemäßen Schneidzahnes 10 ist in Figur 2a dargestellt. Der insgesamt etwa quaderförmige Schneidzahn 10 weist einen Schneidkopf 12 und einen etwa zungenförmigen Zahnschaft 14 auf. Im Bereich des Zahnschaftes 14 sind zwei als Bohrungen ausgeführte Ausnehmungen 18 zur Befestigung des Zahnschaftes 14 vorgesehen.An underside of a facing the earth-working machine Cutting tooth 10 according to the invention is shown in FIG. 2a. The approximately cuboid cutting tooth 10 has a cutting head 12 and an approximately tongue-shaped Tooth shaft 14 on. In the area of the tooth shaft 14 there are two Recesses 18 designed as bores for fastening the toothed shaft 14 is provided.

Entlang einer Schmalseite 16 des Schneidzahnes 10 ist, wie anschaulich in Figur 2b dargestellt, eine im Querschnitt etwa rechteckige Nut 20 ausgebildet. Diese Nut 20 bildet mit der Leiste 16 an der Halterung eine Passung, so dass in einer Querrichtung eine formschlüssige Halterung des Schneidzahnes 10 in der Halterung 30 möglich ist.Along a narrow side 16 of the cutting tooth 10 is how illustrated in Figure 2b, one in cross section approximately rectangular groove 20 formed. This groove 20 forms with the bar 16 on the bracket, so that in a positive locking of the cutting tooth in a transverse direction 10 in the bracket 30 is possible.

Wie aus der Seitenansicht gemäß Figur 2b sowie der Draufsicht gemäß Figur 2d anschaulich zu entnehmen ist, ist am Schneidkopf 12 eine Aufnahmeeinrichtung für stiftförmige Schneideinrichtungen 26 vorgesehen. As from the side view according to Figure 2b and the top view 2d can be clearly seen from FIG Cutting head 12 a receiving device for pin-shaped Cutting devices 26 are provided.

An einer gemäß Seitenansicht von Figur 2c dargestellten Breitseite 22, welche im Betrieb vom Erdbearbeitungsgerät abgewandt und dem zu bearbeitenden Boden zugewandt ist, ist zur Verminderung des Verschleißes eine pfeilförmige Erhebung 24 vorgesehen, an welcher drei verschleißmindernde Elemente 25 angeordnet sind. Die Erhebung 24 erstreckt sich sowohl über den Zahnschaft 14 als auch den Zahnkopf 12. Die Dicke der Erhebung 24 ist dabei so ausgebildet, dass sie definiert gegenüber der Halterung 30 vorsteht, so dass durch die Erhebung 24 nicht nur der Schneidzahn 10 sondern auch die Halterung 30 vor Verschleiß geschützt werden kann. Zusätzlich ist die obere Flachseite der Erhebung 24 durch die vorstehenden verschleißmindernden Elemente 25 vor Verschleiß geschützt, welche auch ein Freischneiden des Bohrwerkzeuges ermöglichen.On a shown according to the side view of Figure 2c Broadside 22, which is in operation from the earth-working machine turned away and facing the soil to be worked, is arrow-shaped to reduce wear Survey 24 provided on which three wear-reducing Elements 25 are arranged. The survey 24 extends both over the tooth shaft 14 and the tooth head 12. Die The thickness of the elevation 24 is designed so that it protrudes from the bracket 30 so that through the elevation 24 not only the cutting tooth 10 but the bracket 30 can be protected from wear. In addition, the upper flat side of the elevation 24 is through the above wear-reducing elements 25 from wear protected, which also means cutting the drilling tool free enable.

Die montierte erfindungsgemäße Schneidzahnanordnung 1 mit ihrer zum Boden gerichteten Seite ist in der Seitenansicht von Figur 3a dargestellt. Entsprechend zeigt Figur 3b die innere Breitseite der erfindungsgemäßen Schneidzahnanordnung 1, welche im Betrieb dem Grundkörper des Erdbearbeitungsgerätes zugewandt ist.The mounted cutting tooth arrangement 1 according to the invention its side facing the floor is in side view shown by Figure 3a. Accordingly, Figure 3b shows the inner broad side of the cutting tooth arrangement according to the invention 1, which in operation is the base body of the earth-working machine is facing.

In der montierten, eingesteckten Position ist der Zahnschaft 14 des Schneidzahnes 10 ausschließlich seitlich von den Haltearmen 34 der Halteeinrichtung 30 umfasst. Die Breitseiten des Schneidzahnes 10 liegen somit frei, wobei jedoch die eine Seite durch den Grundkörper des nicht dargestellten Erdbearbeitungsgerätes abgedeckt ist. Nach einem Einstecken des Schneidzahnes 10 in Einsteckrichtung P in die Halterung 30 erfolgt eine Lagefixierung mittels nicht näher dargestellter Befestigungsstifte 5. Die Befestigungsstifte 5 werden in Durchgänge 3 gesteckt, welche durch die Ausnehmungen 18 an dem Schneidzahn 10 und die halbkreisförmigen Ausnehmungen 38 im Randbereich der Anlageseiten 36 der Haltearme 34 gebildet sind.The toothed shaft is in the assembled, inserted position 14 of the cutting tooth 10 only laterally from the holding arms 34 of the holding device 30 comprises. The Broad sides of the cutting tooth 10 are thus exposed, whereby however, one side through the base body of the not shown Soil cultivation equipment is covered. After one Inserting the cutting tooth 10 in the insertion direction P in the Bracket 30 is not fixed in position by means of illustrated fastening pins 5. The fastening pins 5 are inserted into passages 3, which through the recesses 18 on the cutting tooth 10 and the semicircular Recesses 38 in the edge region of the contact sides 36 of the holding arms 34 are formed.

Die Kombination des Formschlusses, welcher durch die Kontaktflächen zwischen Halterung 30 und dem Zahnschaft 14 erreicht wird, mit der kraftschlüssigen Verbindung durch die quer verlaufenden Befestigungsstifte 5 wird eine zuverlässige und gleichwohl gut lösbare Halterung des Schneidzahnes 10 in der am Erdbearbeitungsgerät befestigten Halterung 30 erreicht.The combination of positive locking, which is achieved through the contact surfaces reached between bracket 30 and the tooth shaft 14 with the non-positive connection through the transverse mounting pins 5 will be a reliable and nevertheless easily detachable holder of the cutting tooth 10 in the bracket 30 attached to the earth-working machine reached.

Claims (10)

  1. Cutting tooth arrangement for an earth work apparatus comprising a cutting tooth (10), which has a tooth face (12) and a tooth shank (14), and a support (30) having an inserting orifice (32) into which the tooth shank (14) can be inserted in an inserting direction, wherein in an inserted position the tooth shank (14) is detachably supported in the support (30) by means of a mounting pin (5) arranged transversely to the inserting direction,
    characterized in that
    the support (30) is designed in a fork-shaped manner with two supporting arms (34),
    the supporting arms (34) each have a contact side (36) which rest against narrow sides (16) of the tooth shank (14),
    the contact sides (36) and the narrow sides (16) are provided with a profile in a direction transverse to the inserting direction in order to produce a form fit, and
    at the contact side (36) of at least one supporting arm (34) and at the mating narrow side (16) of the tooth shank (14) a recess (18, 38) is each provided, which jointly form a passage (3) for the mounting pin (5) in the inserted position.
  2. Cutting tooth arrangement according to claim 1,
    characterized in that
    a recess (38; 18) is each provided at both contact sides (36) and at both narrow sides (16) and
    in that the tooth shank (14) is supported on either side by means of two mounting pins (5).
  3. Cutting tooth arrangement according to claim 1 or 2,
    characterized in that
    the form fit between the contact side (36) and the narrow side (16) is constituted by a rear grip rail.
  4. Cutting tooth arrangement according to any one of claims 1 to 3,
    characterized in that
    a protruding rail (40) is designed along the contact side (36), which engages into a groove (20) designed correspondingly at the narrow side (16) of the tooth shank (14).
  5. Cutting tooth arrangement according to any one of claims 1 to 4,
    characterized in that
    the supporting arms (34) are connected to each other by a transverse yoke (42) in their bottom area turned away from the inserting orifice (32).
  6. Cutting tooth arrangement according to claim 5,
    characterized in that
    the transverse yoke (42) and the lateral surface of the tooth shank (14) that rests against said transverse yoke are also profiled.
  7. Cutting tooth arrangement according to any one of claims 1 to 6,
    characterized in that
    as a result of the profiled contact side (36) and the profiled narrow side (16) a rectangular guide is formed.
  8. Cutting tooth arrangement according to any one of claims 1 to 7,
    characterized in that
    a broad side (22) of the tooth shank (14), which in the inserted position is turned away from the earth work apparatus and faces towards the ground, protrudes with respect to the support (30).
  9. Cutting tooth arrangement according to any one of claims 1 to 8,
    characterized in that
    at the broad side (22) of the cutting tooth (10), which is turned away from the earth drilling apparatus, an elevation (24) consisting of wear-reducing elements (25) is arranged.
  10. Cutting tooth arrangement according to any one of claims 1 to 9,
    characterized in that
    in the area of the inserting orifice (32) the supporting arms (34) are chamfered and/or widened in their distance to each other.
EP01127951A 2001-01-12 2001-11-23 Cutting tooth arrangement Expired - Lifetime EP1223302B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE50101470.5T DE50101470C5 (en) 2001-01-12 2001-11-23 array of cutting teeth

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20100550U 2001-01-12
DE20100550U DE20100550U1 (en) 2001-01-12 2001-01-12 Cutting tooth arrangement

Publications (3)

Publication Number Publication Date
EP1223302A2 EP1223302A2 (en) 2002-07-17
EP1223302A3 EP1223302A3 (en) 2003-03-19
EP1223302B1 true EP1223302B1 (en) 2004-02-11

Family

ID=7951529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127951A Expired - Lifetime EP1223302B1 (en) 2001-01-12 2001-11-23 Cutting tooth arrangement

Country Status (7)

Country Link
EP (1) EP1223302B1 (en)
AT (1) ATE259465T1 (en)
DE (2) DE20100550U1 (en)
DK (1) DK1223302T3 (en)
ES (1) ES2215839T3 (en)
HK (1) HK1046162B (en)
PT (1) PT1223302E (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011051751A1 (en) 2011-07-12 2013-01-17 Betek Gmbh & Co. Kg Harrow tines
DE102017126726B4 (en) * 2017-11-14 2020-01-09 Holger Selg Holder device and stud body of an earth auger
AT16203U1 (en) * 2017-11-14 2019-03-15 Dr Holger Selg In the lower end face of a hollow cylindrical wall of an earth drill to be introduced holder device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079710A (en) * 1961-06-22 1963-03-05 Esco Corp Ground-working tooth and method
DE4002907A1 (en) * 1990-02-01 1991-08-08 Leffer Stahl & App Cylindrical cutting head forms extension of borehole drill pipe

Also Published As

Publication number Publication date
ATE259465T1 (en) 2004-02-15
DK1223302T3 (en) 2004-06-14
DE50101470C5 (en) 2017-11-16
HK1046162A1 (en) 2002-12-27
ES2215839T3 (en) 2004-10-16
DE50101470D1 (en) 2004-03-18
DE20100550U1 (en) 2001-04-19
EP1223302A3 (en) 2003-03-19
PT1223302E (en) 2004-06-30
HK1046162B (en) 2004-09-10
EP1223302A2 (en) 2002-07-17

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