EP0142124A2 - Heading machine with controlled revolving picks - Google Patents

Heading machine with controlled revolving picks Download PDF

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Publication number
EP0142124A2
EP0142124A2 EP84113400A EP84113400A EP0142124A2 EP 0142124 A2 EP0142124 A2 EP 0142124A2 EP 84113400 A EP84113400 A EP 84113400A EP 84113400 A EP84113400 A EP 84113400A EP 0142124 A2 EP0142124 A2 EP 0142124A2
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EP
European Patent Office
Prior art keywords
chisel
boring machine
machine according
clamping element
chisels
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.)
Ceased
Application number
EP84113400A
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German (de)
French (fr)
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EP0142124A3 (en
Inventor
Klaus Ketterer
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.)
Stranovsky Schweisstechnik und Apparatebau GmbH
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Stranovsky Schweisstechnik und Apparatebau GmbH
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Publication of EP0142124A2 publication Critical patent/EP0142124A2/en
Publication of EP0142124A3 publication Critical patent/EP0142124A3/en
Ceased legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/187—Mining picks; Holders therefor with arrangement of fluid-spraying nozzles

Definitions

  • the invention relates to a device for releasing mineral present in the dressing, in particular a tunnel boring machine with a rotatable cutting head which is equipped with chisels which are rotatable with their shafts via a clamping element in the chisel holder and are axially displaceably spring-loaded between mountains and abutments.
  • the cutting and cutting heads on tunnel boring machines and striving machines essentially consist of the basic body and the bit holders welded onto the basic body, the chisels rotatably arranged therein and possibly also valves, nozzles and the like.
  • Devices for controlling the high pressure water supply The chisels are movable in the chisel holders, ie rotatable and slightly longitudinally displaceable in the axial direction. The rotatability the chisel is intended to cause even wear of the cutting edge and, at the same time, self-sharpening.
  • a round shank chisel in particular for part-cutting machines, which consists of a shank which can be exchangeably fastened in a chisel holder, with a hard metal cutting edge arranged on the tip of the shank outside the chisel holder, the chisel being hydraulically damped in the chisel holder and the high tension water is used as a coolant by the damping.
  • the displaceability of the chisel is used to control the high-pressure spray water and to cushion the chisel movement or the reaction forces.
  • the rotary movement of the chisel is generated by the reaction forces acting on the chisel through the rock.
  • the chisel holder must do so. be welded onto the cutting head so that the so-called angle of rotation results between the working direction of the chisel and its longitudinal axis, which is about 8 ° in the current cutting heads.
  • the angle of rotation has the disadvantage that it does not apply to the entire working area and not for all movements of the cutting head and in the same size. If, however, the angle of rotation cannot be maintained in the specified size, the reaction forces acting on the chisel do not cause a reliable rotary movement, which in turn causes rapid and unilateral wear of the chisel edge. On the other hand, the angle of rotation reduces the effective cutting performance of the chisels, since they cannot work in the axial direction.
  • the invention has for its object to provide a tunnel boring machine with chisels that are securely rotated in cycles with optimal intervention.
  • the object is achieved in that the Chisels and / or the chisel holders with the chisels are arranged with their longitudinal axis in the working direction and that the chisels or the chisel shank is assigned a rotating part designed in the manner of a freewheel.
  • a cutting head equipped in this way has an increased cutting performance and improved service life, because the chisels arranged in the bit holders are rotated by a certain amount evenly and independently of the angle of rotation with each intervention or after each intervention in the rock. This results in an even utilization of the chisel cutting edge and a kind of self-sharpening, which brings additional advantages.
  • the rotating part, which causes the chisel to rotate evenly, is arranged in such a way that it is protected from damage, so that its effectiveness is ensured over a long period of time.
  • the rotating part is movably connected to the cutting head and the rotating part is assigned to the cutting head acting on the chisel.
  • the reaction forces that occur each time the chisel engages in the rock are used to pivot the chisel holder, this movement inter alia. is in turn used to twist the chisel in cycles.
  • a simple and effective design of the rotary device is that in which the clamping element which is displaceable in the axial direction on the shaft groove has a toothing at the lower edge which is designed to correspond to a toothing provided at the shaft end and that the clamping element having cams is guided in guide grooves which are spirally worked into the inner wall of the chisel holder.
  • Similar clamping elements are already used in known track boring machines to achieve and secure the axial movement of the bit in the bit holder.
  • the clamping element is equipped with cams that engage in the inner wall of the bit holder. This clamping element is now converted into the above-mentioned turned part by assigning a toothing at the lower edge which corresponds to the toothing on the shaft end.
  • the cams of the clamping element engage in guide grooves machined into the inner wall in a spiral. It is thereby achieved that when the chisel is moved downwards in the form of an engagement, the chisel is pressed into the chisel holder without being rotated. During this movement, he actuates the piston pump provided, for example, and thus generates high-tension water. At the end of the intervention in the mountains, water is pressed into the piston pump at normal pressure, so that the chisel is transported out of its lower position again. The teeth now mesh and the chisel is forced to turn.
  • the shank groove is, according to the invention, 5 to 20 mm, preferably lo mm wider than the clamping element. This ensures that the toothing loosens during this downward stroke, thereby preventing the bit from turning back.
  • the invention provides that the angular extent of the individual rotary file of the rotary member is set to one of 36 different 0 ° sum yielding.
  • the technical progress of the invention is essentially due to the fact that the axial movement sequence previously used in the downward movement of the chisel in addition to the damping also for generating pressure for the spraying water, the upward movement generated by the piston pump in a simple manner to ensure a cyclical rotary movement and thus for Reduction of the one-sided wear as well as to the uniform self-sharpening of the cutting edge and thus to longer tool life of the chisel without the chisel having to stand at an angle to the rock.
  • the chisel stands with its longitudinal axis in the working direction, so that an effective and optimal engagement is predetermined, which leads to improved performance of such cutting heads.
  • FIG. 1 shows a cutting head 1, only indicated, with which the bit holder 3 equipped with a bit 2 is connected, preferably welded.
  • the chisel 2 projects with its chisel shaft 4 into the chisel holder 3, which has a bore for this purpose.
  • This hole is closed at the bottom by a plug 5, so that a damping or spring element can be installed between the chisel shaft and the plug, which ensures a safe return movement of the chisel 2 in the event of non-intervention in the mountains.
  • the chisel 2 which is axially displaceable in the bore in the bit holder 3, is provided within a shaft groove 7 with a clamping element 6, which has a smaller height in the axial direction than the shaft groove 7.
  • the shaft groove 7 is at the lower end, i.e. provided at the shaft end 26 with a circumferential toothing lo.
  • the clamping element 6 is also provided at the lower end with a toothing 11 corresponding to the toothing lo.
  • the cams 8 of the clamping element 6 are mounted in spiral guide grooves 9.
  • a pump 12 is provided as the pressure and spring element.
  • the pump 12 consists essentially of a piston 15 which is pressed into a cylinder 16 when the chisel 2 moves downward via the contact of the knobs 13, 14.
  • the pump chamber 17 is supplied with water of normal pressure via water supply channels 19 and the ring channel 20.
  • the pump chamber 17 is shielded by a check valve 18 and connected to the line 21 which leads to the nozzle 22 provided with a check valve 23.
  • the clamping element 6 and the associated shaft end 26 together form a free-running rotating part 25. If the chisel 2 and the cutting edge are not in engagement with the rock or mineral, the pump chamber 17 is filled with water, the piston 15 forming the chisel 2 Forcing upward movement. The toothing lo engages in the toothing 11 of the clamping element 6. Since the cams 8 run in spiral guide grooves 9, this upward movement of the bit 2 is rotated by a predetermined number of degrees. If the chisel 2 now engages in solid rock or mountains, it is printed into the chisel holder 3 by the reaction force.
  • the toothings lo, 11 separate from one another and the chisel 2 is returned into the bore 4 without rotation.
  • the clamping element 6 is in the downward movement of the chisel 2 rotated back by the cams 8 guided in the spiral guide grooves 9.
  • the water in the pump chamber 17 is biased by the piston 15 and sprayed onto the surfaces to be cooled via the water channel 21 and the nozzle 22.
  • the work cycle begins anew, with the chisel 2 being rotated by an angular dimension with each upward movement, which results from the height of the stroke, the increase in the guide grooves 9 and the corresponding toothing lo, 11.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)

Abstract

Heading machines and similar devices for releasing mineral in place in the structure are provided with a cutting head which is fitted with picks which are arranged rotatably and axially displaceably and spring-mounted in the pick holder. These picks or the pick holders are positioned with their longitudinal axis in the working direction and are equipped with a rotary part designed like a free-wheel. The rotary part designed like a free-wheel rotates the picks in a positively controlled manner by a certain angular dimension per cycle so that uniform wear and a self-sharpening effect of the pick occur. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Lösen von im Verband anstehendem Mineral, insbesondere Streckenvortriebsmaschine mit einem drehbaren Schneidkopf, der mit Meißeln bestückt ist, die mit ihrem Schaft über ein Klemmelement im Meißelhalter drehbar und zwischen Gebirge und Widerlager gefedert axial verschieblich gehalten sind.The invention relates to a device for releasing mineral present in the dressing, in particular a tunnel boring machine with a rotatable cutting head which is equipped with chisels which are rotatable with their shafts via a clamping element in the chisel holder and are axially displaceably spring-loaded between mountains and abutments.

Die Schräm- und Schneidköpfe an Streckenvortriebsmaschinen und Strebgewinnungsmaschinen bestehen im wesentlichen aus dem Grundkörper sowie den auf den Grundkörper aufgeschweißten Meißelhaltern, den darin drehbar angeordneten Meißeln und ggf. auch Ventilen, Düsen u.ä. Einrichtungen zur Steuerung der Hochdruckwasserzuführung. Die Meißel sind beweglich in den Meißelhaltern, d.h. drehbar und in axialer Richtung geringfügig längsverschieblich angeordnet. Die Drehbarkeit der Meißel soll eine gleichmäßige Abnutzung der Schneide und gleichzeitig eine Selbstschärfung bewirken. Nach der DE-OS 32 43 137.o ist ein Rundschaftmeißel, insbesondere für Teilschnittmaschinen bekannt, der aus einem auswechselbar in einem Meißelhalter drehbar befestigten Schaft mit einer an der Spitze des Schaftes außerhalb des Meißelhalters angeordneten Hartmetallschneide besteht, wobei der Meißel im Meißelhalter hydraulisch gedämpft und das durch die Dämpfung hochgespannte Wasser als Kühlmittel verwendet wird. Bei einer derartigen Anordnung des Meißels in Verbindung mit einer als Dämpfungselement wirkenden Kolbenpumpe wird die Verschiebbarkeit des Meißels zur Steuerung des Hochdruckbedüsungswassers und zur Abfederung der Meißelbewegung bzw. der Reaktionskräfte verwendet. Die Drehbewegung des Meißels wird durch die auf den Meißel durch das Gestein einwirkenden Reaktionskräfte erzeugt. Hierzu muß der Meißelhalter so. auf dem Schneidkopf aufgeschweißt sein, daß sich zwischen der Arbeitsrichtung des Meißels und seiner Längsachse der sogenannte Drehwinkel ergibt, der bei den derzeitigen Schneidköpfen etwa 8° beträgt. Der Drehwinkel hat den Nachteil, daß dieser nicht für den gesamten Arbeitsbereich und nicht für alle Bewegungsabläufe des Schneidkopfes und in gleicher Größe zum Tragen kommen. Wenn jedoch der Drehwinkel in der vorgegebenen Größe nicht eingehalten werden kann, so verursachen davon abhängig die Reaktionskräfte, die auf den Meißel wirken, keine zuverlässige Drehbewegung, wodurch wiederum ein einseitiger und schneller Verschleiß der Meißelschneide eintritt. Andererseits verringert der Drehwinkel die effektive Schneidleistung der Meißel, da diese nicht in axialer Richtung arbeiten können.The cutting and cutting heads on tunnel boring machines and striving machines essentially consist of the basic body and the bit holders welded onto the basic body, the chisels rotatably arranged therein and possibly also valves, nozzles and the like. Devices for controlling the high pressure water supply. The chisels are movable in the chisel holders, ie rotatable and slightly longitudinally displaceable in the axial direction. The rotatability the chisel is intended to cause even wear of the cutting edge and, at the same time, self-sharpening. According to DE-OS 32 43 137.o, a round shank chisel, in particular for part-cutting machines, is known which consists of a shank which can be exchangeably fastened in a chisel holder, with a hard metal cutting edge arranged on the tip of the shank outside the chisel holder, the chisel being hydraulically damped in the chisel holder and the high tension water is used as a coolant by the damping. With such an arrangement of the chisel in connection with a piston pump acting as a damping element, the displaceability of the chisel is used to control the high-pressure spray water and to cushion the chisel movement or the reaction forces. The rotary movement of the chisel is generated by the reaction forces acting on the chisel through the rock. To do this, the chisel holder must do so. be welded onto the cutting head so that the so-called angle of rotation results between the working direction of the chisel and its longitudinal axis, which is about 8 ° in the current cutting heads. The angle of rotation has the disadvantage that it does not apply to the entire working area and not for all movements of the cutting head and in the same size. If, however, the angle of rotation cannot be maintained in the specified size, the reaction forces acting on the chisel do not cause a reliable rotary movement, which in turn causes rapid and unilateral wear of the chisel edge. On the other hand, the angle of rotation reduces the effective cutting performance of the chisels, since they cannot work in the axial direction.

Der Erfindung liegt die Aufgabe zugrunde, eine Streckenvortriebsmaschine mit Meißeln zu schaffen, die bei optimalem Eingriff taktweise sicher zwangsgedreht werden.The invention has for its object to provide a tunnel boring machine with chisels that are securely rotated in cycles with optimal intervention.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Meißel und/oder die Meißelhalter mit den Meißeln mit ihrer Längsachse in Arbeitsrichtung angeordnet sind und daß den Meißeln bzw. dem Meißelschaft ein freilaufartig ausgebildetes Drehteil zugeordnet ist.The object is achieved in that the Chisels and / or the chisel holders with the chisels are arranged with their longitudinal axis in the working direction and that the chisels or the chisel shank is assigned a rotating part designed in the manner of a freewheel.

Ein derart ausgerüsteter Schneidkopf hat eine erhöhte Schneidleistung und verbesserte Standzeiten, weil die in den Meißelhaltern angeordneten Meißel gleichmäßig und unabhängig vom Drehwinkel bei jedem Eingriff bzw. nach jedem Eingriff in das Gestein um einen bestimmten Betrag gedreht werden. Dadurch kommt es zu einer gleichmäßigen Auslastung der Meißelschneide und zu einer Art Selbstschärfung, was zusätzliche Vorteile mit sich bringt. Das Drehteil, das die gleichmäßige Drehung des Meißels bewirkt, ist dabei so angeordnet, daß es vor Beschädigungen geschützt ist, so daß seine Wirksamkeit über lange Zeit gewährleistet ist.A cutting head equipped in this way has an increased cutting performance and improved service life, because the chisels arranged in the bit holders are rotated by a certain amount evenly and independently of the angle of rotation with each intervention or after each intervention in the rock. This results in an even utilization of the chisel cutting edge and a kind of self-sharpening, which brings additional advantages. The rotating part, which causes the chisel to rotate evenly, is arranged in such a way that it is protected from damage, so that its effectiveness is ensured over a long period of time.

Besonders vorteilhaft ist es, wenn das Drehteil über den axial beweglich gelagerten Meißel beaufschlagbar ist. Auf diese Weise wird vorteilhaft die Bewegung des Meißels im Meißelhalter ausgenutzt und eine aufwendige Ausbildung des Drehteils entfällt. Das Drehteil muß lediglich dafür sorgen, daß bei einer Bewegung des Meißels der Meißelschaft zwangsgeführt ist, während er beim anderen Takt sich frei in der Bohrung im Meißelhalter bewegen kann.It when the rotating part can be acted upon via the axially movably mounted chisel is particularly advantageous. In this way, the movement of the chisel in the chisel holder is advantageously used and a complex design of the turned part is eliminated. The rotating part only has to ensure that the chisel shaft is positively guided when the chisel moves, while it can move freely in the bore in the chisel holder during the other cycle.

Eine andere Möglichkeit, das Drehteil wirksam werden zu lassen, ist die, bei der der Meißelhalter beweglich mit dem Schneidkopf verbunden und das Drehteil dem Schneidkopf auf den Meißel einwirkend zugeordnet ist. Hierbei werden in ähnlicher Weise die bei jedem Eingreifen der Meißel in das Gebirge auftretenden Reaktionskräfte dazu ausgenutzt, den Meißelhalter zu verschwenken, wobei diese Bewegung u.a. wiederum dafür ausgenutzt wird, den Meißel taktweise zu verdrehen.Another possibility of making the rotating part effective is that in which the chisel holder is movably connected to the cutting head and the rotating part is assigned to the cutting head acting on the chisel. In a similar manner, the reaction forces that occur each time the chisel engages in the rock are used to pivot the chisel holder, this movement inter alia. is in turn used to twist the chisel in cycles.

Eine einfache und wirksame Ausbildung der Drehvorrichtung ist die, bei der das auf der Schaftnut in axialer Richtung verschiebliche Klemmelement am unteren Rand eine Verzahnung aufweist, die mit einer am Schaftende vorgesehenen Verzahnung korrespondierend ausgebildet ist und daß das Nocken aufweisende Klemmelement in Führungsnuten geführt ist, die spiralförmig in die Innenwand des Meißelhalters eingearbeitet sind. Ähnliche Klemmelemente werden auch bei bekannten Streckenvortriebsmaschinen schon dazu eingesetzt, die axiale Bewegung des Meißels im Meißelhalter zu erreichen und zu sichern. Dazu ist das Klemmelement mit Nocken ausgerüstet, die in die Innenwand des Meißelhalters eingreifen. Dieses Klemmelement wird nunmehr zu dem erwähnten Drehteil umfunktioniert, indem ihm am unteren Rand eine Verzahnung zugeordnet wird, die mit der Verzahnung auf dem Schaftende korrespondiert. Außerdem greifen die Nocken des Klemmelementes in spiralförmig in die Innenwand eingearbeitete Führungsnuten ein. Dadurch wird erreicht, daß beim Abwärtsbewegen des Meißels in Form eines Eingriffes der Meißel ohne gedreht zu werden, in den Meißelhalter hineingedrückt wird. Bei dieser Bewegung betätigt er die beispielsweise vorgesehene Kolbenpumpe und erzeugt so hochgespanntes Wasser. Bei Beendigung des Eingriffs ins Gebirge wird Wasser mit Normaldruck in die Kolbenpumpe hineingedrückt, so daß der Meißel aus seiner unteren Stellung wieder herausbefördert wird. Dabei greifen nun die Verzahnungen ineinander und der Meißel wird zwangsgedreht.A simple and effective design of the rotary device is that in which the clamping element which is displaceable in the axial direction on the shaft groove has a toothing at the lower edge which is designed to correspond to a toothing provided at the shaft end and that the clamping element having cams is guided in guide grooves which are spirally worked into the inner wall of the chisel holder. Similar clamping elements are already used in known track boring machines to achieve and secure the axial movement of the bit in the bit holder. For this purpose, the clamping element is equipped with cams that engage in the inner wall of the bit holder. This clamping element is now converted into the above-mentioned turned part by assigning a toothing at the lower edge which corresponds to the toothing on the shaft end. In addition, the cams of the clamping element engage in guide grooves machined into the inner wall in a spiral. It is thereby achieved that when the chisel is moved downwards in the form of an engagement, the chisel is pressed into the chisel holder without being rotated. During this movement, he actuates the piston pump provided, for example, and thus generates high-tension water. At the end of the intervention in the mountains, water is pressed into the piston pump at normal pressure, so that the chisel is transported out of its lower position again. The teeth now mesh and the chisel is forced to turn.

Um beim Abwärtsbewegen des Meißels im Meißelhalter ein Drehen zu vermeiden, ist die Schaftnut erfindungsgemäß um 5 bis 2o mm, vorzugsweise lo mm breiter als das Klemmelement. Dadurch ist sichergestellt, daß sich bei diesem Abwärtshub die Verzahnung löst und dadurch ein Zurückdrehen des Meißels verhindert ist.In order to prevent the chisel from rotating when the chisel moves downward, the shank groove is, according to the invention, 5 to 20 mm, preferably lo mm wider than the clamping element. This ensures that the toothing loosens during this downward stroke, thereby preventing the bit from turning back.

Je nach Größe der Meißel werden diese beispielsweise mit sechs Takten einmal um sich selbst gedreht. Um dabei zu verhindern, daß dann immer wieder die gleichen Stellen zum Eingriff kommen, ist erfindungsgemäß vorgesehen, daß das Winkelmaß der einzelnen Drehtakte des Drehteils eine von 360° abweichende Summe ergebend eingestellt ist.Depending on the size of the chisel, these are included, for example rotated six bars once around itself. In order to prevent this is that then always the same locations come to be engaged, the invention provides that the angular extent of the individual rotary file of the rotary member is set to one of 36 different 0 ° sum yielding.

Der technische Fortschritt der Erfindung ist im wesentlichen darin begründet, daß der axiale Bewegungsablauf der bisher in der Abwärtsbewegung des Meißels neben der Dämpfung auch zur Druckerzeugung des Bedüsungswassers verwendet wurde, die durch die Kolbenpumpe erzeugte Aufwärtsbewegung auf einfache Weise zur Gewährleistung einer taktweisen Drehbewegung und somit zur Verminderung des einseitigen Verschleisses sowie zur gleichmäßigen Selbstschärfung der Schneide und somit zu längeren Standzeiten des Meißels beiträgt, ohne daß hierfür der Meißel mit einem Drehwinkel zum Gestein stehen muß. Der Meißel steht mit seiner Längsachse in Arbeitsrichtung, so daß ein wirkungsvoller und optimaler Eingriff vorgegeben ist, was zur verbesserten Leistung derartiger Schneidköpfe führt.The technical progress of the invention is essentially due to the fact that the axial movement sequence previously used in the downward movement of the chisel in addition to the damping also for generating pressure for the spraying water, the upward movement generated by the piston pump in a simple manner to ensure a cyclical rotary movement and thus for Reduction of the one-sided wear as well as to the uniform self-sharpening of the cutting edge and thus to longer tool life of the chisel without the chisel having to stand at an angle to the rock. The chisel stands with its longitudinal axis in the working direction, so that an effective and optimal engagement is predetermined, which leads to improved performance of such cutting heads.

Ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist in schematisierter Form und teilweise geschnitten in der Zeichnung dargestellt und wird im folgenden näher erläutert.An embodiment of the device according to the invention is shown in schematic form and partly in section in the drawing and is explained in more detail below.

Fig. 1 zeigt einen nur angedeuteten Schneidkopf 1, mit dem der mit einem Meißel 2 bestückte Meißelhalter 3 verbunden, vorzugsweise verschweißt ist. Der Meißel 2 ragt mit seinem MeiBelschaft 4 in den Meißelhalter 3 hinein, der hierzu eine Bohrung aufweist. Diese Bohrung ist unten über einen Stopfen 5 verschlossen, so daß zwischen den Meißelschaft und den Stopfen ein Dämpf- oder Federelement eingebaut werden kann, das eine sichere Rückbewegung des Meißels 2 bei Nichteingriff in das Gebirge sicherstellt.1 shows a cutting head 1, only indicated, with which the bit holder 3 equipped with a bit 2 is connected, preferably welded. The chisel 2 projects with its chisel shaft 4 into the chisel holder 3, which has a bore for this purpose. This hole is closed at the bottom by a plug 5, so that a damping or spring element can be installed between the chisel shaft and the plug, which ensures a safe return movement of the chisel 2 in the event of non-intervention in the mountains.

Der in der Bohrung im Meißelhalter 3 in axialer Richtung verschiebbare Meißel 2 ist innerhalb einer Schaftnut 7 mit einem Klemmelement 6 versehen, welches in axialer Richtung eine geringere Höhe aufweist, als die Schaftnut 7. Die Schaftnut 7 ist am unteren Ende, d.h. am Schaftende 26 mit einer umlaufenden Verzahnung lo versehen. Das Klemmelement 6 ist ebenfalls am unteren Ende mit einer mit der Verzahnung lo korrespondierenden Verzahnung 11 versehen. Die Nocken 8 des Klemmelementes 6 sind in spiralförmig verlaufenden Führungsnuten 9 gelagert.The chisel 2, which is axially displaceable in the bore in the bit holder 3, is provided within a shaft groove 7 with a clamping element 6, which has a smaller height in the axial direction than the shaft groove 7. The shaft groove 7 is at the lower end, i.e. provided at the shaft end 26 with a circumferential toothing lo. The clamping element 6 is also provided at the lower end with a toothing 11 corresponding to the toothing lo. The cams 8 of the clamping element 6 are mounted in spiral guide grooves 9.

Bei dem in der Figur gezeigten Ausführungsbeispiel ist als Druck- und Federelement eine Pumpe 12 vorgesehen. Die Pumpe 12 besteht im wesentlichen aus einem Kolben 15, der bei der Abwärtsbewegung des Meißels 2 über den Kontakt der Noppen 13, 14 in einen Zylinder 16 gedrückt wird. Der Pumpenraum 17 wird über Wasserzuführungskanäle 19 und den Ringkanal 2o mit Wasser normalen Drucks beaufschlagt. Der Pumpenraum 17 ist über ein Rückschlagventil 18 abgeschirmt und mit der Leitung 21 verbunden, die zu der mit einem Rückschlagventil 23 versehenen Düse 22 führt.In the embodiment shown in the figure, a pump 12 is provided as the pressure and spring element. The pump 12 consists essentially of a piston 15 which is pressed into a cylinder 16 when the chisel 2 moves downward via the contact of the knobs 13, 14. The pump chamber 17 is supplied with water of normal pressure via water supply channels 19 and the ring channel 20. The pump chamber 17 is shielded by a check valve 18 and connected to the line 21 which leads to the nozzle 22 provided with a check valve 23.

Das Klemmelement 6 und das zugeordnete Schaftende 26 bilden gemeinsam ein freilaufartig wirkendes Drehteil 25. Stehen der Meißel 2 und die Schneide nicht im Eingriff mit dem Gestein bzw. Mineral, wird der Pumpenraum 17 mit Wasser gefüllt, wobei der Kolben 15 den Meißel 2 zu einer Aufwärtsbewegung zwingt. Dabei greift die Verzahnung lo in die Verzahnung 11 des Klemmelementes 6 ein. Da die Nocken 8 in spiralförmigen Führungsnuten 9 verlaufen, wird bei dieser Aufwärtsbewegung des Meißels 2 diese um eine vorbestimmte Gradzahl gedreht. Greift nun der Meißel 2 in festes Gestein oder Gebirge ein, wird er durch die Reaktionskraft in den Meißelhalter 3 gedruckt. Bei der Abwärtsbewegung-des Meißels 2 lösen sich die Verzahnungen lo, 11 voneinander und der Meißel 2 wird ohne Drehung in die Bohrung 4 zurückgeführt. Das Klemmelement 6 wird bei der Abwärtsbewegung des Meißels 2 durch die in den spiralförmigen Führungsnuten 9 geführtem Nocken 8 zurückgedreht. Bei der Abwärtsbewegung des MeiPels 2 wird wie bereits erwähnt, durch den Kolben 15 das Wasser im Pumpenraum 17 vorgespannt und über den Wasserkanal 21 und die Düse 22 auf die zu kühlenden Flächen verspritzt. Bei der nachfolgenden Füllung des Pumpenraums 17 beginnt das Arbeitsspiel von neuem, wobei der Meißel 2 bei jeder Aufwärtsbewegung um ein Winkelmaß gedreht wird, welches sich aus der Höhe des Hubes, der Steigerung der Führungsnuten 9 und der miteinander korrespondierenden Verzahnung lo, 11 ergibt.The clamping element 6 and the associated shaft end 26 together form a free-running rotating part 25. If the chisel 2 and the cutting edge are not in engagement with the rock or mineral, the pump chamber 17 is filled with water, the piston 15 forming the chisel 2 Forcing upward movement. The toothing lo engages in the toothing 11 of the clamping element 6. Since the cams 8 run in spiral guide grooves 9, this upward movement of the bit 2 is rotated by a predetermined number of degrees. If the chisel 2 now engages in solid rock or mountains, it is printed into the chisel holder 3 by the reaction force. During the downward movement of the chisel 2, the toothings lo, 11 separate from one another and the chisel 2 is returned into the bore 4 without rotation. The clamping element 6 is in the downward movement of the chisel 2 rotated back by the cams 8 guided in the spiral guide grooves 9. During the downward movement of the MeiPels 2, as already mentioned, the water in the pump chamber 17 is biased by the piston 15 and sprayed onto the surfaces to be cooled via the water channel 21 and the nozzle 22. When the pump chamber 17 is subsequently filled, the work cycle begins anew, with the chisel 2 being rotated by an angular dimension with each upward movement, which results from the height of the stroke, the increase in the guide grooves 9 and the corresponding toothing lo, 11.

Claims (7)

1. Vorrichtung zum Lösen von im Verband anstehendem Mineral, insbesondere Streckenvortriebsmaschine mit einem drehbaren Schneidkopf, der mit Meißeln bestückt ist, die mit ihrem Schaft über ein Klemmelement im Meißelhalter drehbar und zwischen Gebirge und Widerlager gefedert axial verschieblich gehalten sind, dadurch gekennzeichnet, daß die Meißel (2) und/oder die Meißelhalter (3) mit den Meißeln mit ihrer Längsachse in Arbeitsrichtung angeordnet sind und daß den Meißeln bzw. dem Meißelschaft (4) ein freilaufartig ausgebildetes Drehteil (25) zugeordnet ist.1.Device for releasing mineral present in the dressing, in particular a tunnel boring machine with a rotatable cutting head which is equipped with chisels which are rotatable with their shafts via a clamping element in the bit holder and are axially displaceably spring-loaded between mountains and abutments, characterized in that the Chisels (2) and / or the chisel holders (3) with the chisels are arranged with their longitudinal axis in the working direction and that the chisels or the chisel shaft (4) are assigned a free-running rotary part (25). 2. Streckenvortriebsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Drehteil (25) über den axial beweglich gelagerten Meißel (2) beaufschlagbar ist.2. Line boring machine according to claim 1, characterized in that the rotating part (25) via the axially movably mounted chisel (2) can be acted upon. 3. Streckenvortriebsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Meißelhalter (3) beweglich mit dem Schneidkopf (1) verbunden und das Drehteil (25) dem Schneidkopf auf den Meißel einwirkend zugeordnet ist. - 3. Line boring machine according to claim 1, characterized in that the bit holder (3) is movably connected to the cutting head (1) and the rotating part (25) is assigned to the cutting head acting on the chisel. - 4. Streckenvortriebsmaschine nach Anspruch 1 und Anspruch 2, dadurch gekennzeichnet, daß das auf der Schaftnut (7) in axialer Richtung verschiebliche Klemmelement (6) am unteren Rand eine Verzahnung (11) aufweist, die mit einer am Schaftende (26) vorgesehenen Verzahnung (lo) korrespondierend ausgebildet ist, und daß das Nocken (8) aufweisende Klemmelement in Führungsnuten (9) geführt ist, die in die Innenwand des Meißelhalters (3) eingearbeitet sind.4. A tunnel boring machine according to claim 1 and claim 2, characterized in that the clamping element (6) which is displaceable in the axial direction on the shaft groove (7) has a toothing (11) at the lower edge which has a toothing provided on the shaft end (26) ( lo) is designed correspondingly, and that the cam (8) having clamping element is guided in guide grooves (9) which are incorporated in the inner wall of the bit holder (3). 5. Streckenvortriebsmaschine nach Anspruch 4, dadurch gekennzeichnet, daß die Schaftnut (7) um 5 bis 2o mm, vorzugsweise lo mm breiter ist als das Klemmelement (6).5. track boring machine according to claim 4, characterized in that the shaft groove (7) by 5 to 20 mm, preferably lo mm wider than the clamping element (6). 6. Streckenvortriebsmaschine nach Anspruch 4 und Anspruch 5, dadurch gekennzeichnet, daß die Schaftnut (7) bezüglich ihrer Breite veränderbar ausgebildet ist.6. Line boring machine according to claim 4 and claim 5, characterized in that the shaft groove (7) is variable in its width. 7. Streckenvortriebsmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Winkelmaß der einzelnen Drehtakte des Drehteils (25) eine von 360° abweichende Summe ergebend eingestellt ist.7. track boring machine according to claim 1, characterized in that the angular dimension of the individual rotational cycles of the rotating part (25) is set resulting in a difference from 36 0 °.
EP84113400A 1983-11-15 1984-11-07 Heading machine with controlled revolving picks Ceased EP0142124A3 (en)

Applications Claiming Priority (2)

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DE19833341322 DE3341322C2 (en) 1983-11-15 1983-11-15 Holder for picks
DE3341322 1983-11-15

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EP0142124A2 true EP0142124A2 (en) 1985-05-22
EP0142124A3 EP0142124A3 (en) 1986-10-01

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0231107A1 (en) * 1986-01-31 1987-08-05 Anderson Strathclyde Plc Cutting tool and holder therefor
WO2010142224A1 (en) * 2009-06-10 2010-12-16 Wang Mu-Yi Planing blade for road
AU2013205232B2 (en) * 2012-04-23 2015-11-26 Myles Aaron Wylie Frictional Heat Suppressing Tip and Pick
CN109555533A (en) * 2019-01-16 2019-04-02 滕州市金达煤炭有限责任公司 A kind of coal mining boom-type roadheader
CN117552784A (en) * 2024-01-11 2024-02-13 大同市同华矿机制造有限责任公司 Cutting tool bit and cutting drum

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624363B4 (en) * 1995-07-06 2004-02-05 Rag Ag Chisel-equipped extraction machine with spray inspection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302053A (en) * 1980-02-23 1981-11-24 The United States Of America As Represented By The Secretary Of The Interior Mounting block to rotate coal cutter bits

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US103602A (en) * 1870-05-31 Improvement in apparatus for evaporating liquids
DE3242137C2 (en) 1982-11-13 1985-06-05 Ruhrkohle Ag, 4300 Essen Damped, guided pick

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302053A (en) * 1980-02-23 1981-11-24 The United States Of America As Represented By The Secretary Of The Interior Mounting block to rotate coal cutter bits

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0231107A1 (en) * 1986-01-31 1987-08-05 Anderson Strathclyde Plc Cutting tool and holder therefor
WO2010142224A1 (en) * 2009-06-10 2010-12-16 Wang Mu-Yi Planing blade for road
US8562079B2 (en) 2009-06-10 2013-10-22 Mu-Yi Wang Road planing tool
AU2013205232B2 (en) * 2012-04-23 2015-11-26 Myles Aaron Wylie Frictional Heat Suppressing Tip and Pick
CN109555533A (en) * 2019-01-16 2019-04-02 滕州市金达煤炭有限责任公司 A kind of coal mining boom-type roadheader
CN117552784A (en) * 2024-01-11 2024-02-13 大同市同华矿机制造有限责任公司 Cutting tool bit and cutting drum
CN117552784B (en) * 2024-01-11 2024-03-22 大同市同华矿机制造有限责任公司 Cutting tool bit and cutting drum

Also Published As

Publication number Publication date
EP0142124A3 (en) 1986-10-01
DE3341322C2 (en) 1986-04-10
DE3341322A1 (en) 1985-05-30

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