EP0142685B1 - Jaws or shells for a hydraulically driven mechanical rock-splitting apparatus - Google Patents

Jaws or shells for a hydraulically driven mechanical rock-splitting apparatus Download PDF

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Publication number
EP0142685B1
EP0142685B1 EP84111848A EP84111848A EP0142685B1 EP 0142685 B1 EP0142685 B1 EP 0142685B1 EP 84111848 A EP84111848 A EP 84111848A EP 84111848 A EP84111848 A EP 84111848A EP 0142685 B1 EP0142685 B1 EP 0142685B1
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EP
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Prior art keywords
pressure jaws
sliding wedge
jaws
pressure
cylinder
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EP84111848A
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German (de)
French (fr)
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EP0142685A3 (en
EP0142685A2 (en
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Friedhelm Porsfeld
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/04—Other methods or devices for dislodging with or without loading by devices with parts pressed mechanically against the wall of a borehole or a slit

Definitions

  • the invention relates to pressure jaws or shells for a device for mechanical disassembly of rock with a cylinder in which a hydraulically actuated piston with a piston rod is arranged to be longitudinally movable, by means of which a sliding wedge arranged between the pressure jaws is displaceable, the pressure jaws which can be inserted into boreholes are interchangeably mounted in the cylinder block or in a cylinder lower part which is detachably arranged thereon and can be moved laterally to a limited extent, and on their sides facing the sliding wedge each have a slope corresponding to the inclination of the sliding wedge.
  • Stone splitting devices of the type mentioned are generally known (DE-AS-1 254 562; DE-PS-1 783 155). Forces of the order of magnitude of 300 t and more can be generated with such relatively handy devices. The use of explosives is no longer necessary to remove rocks or break them up.
  • the present invention has for its object to provide pressure jaws or shells for a device of the type mentioned, which can be used even with relative displacements of the rock in the direction of the row of holes, so that manually driven riving knife can be dispensed with.
  • This mechanism must be designed in such a way that the pressure jaws do not have to be rotated when fixing them to the cylinder or cylinder lower part, or at least can be pivoted away from the sliding wedge to such an extent that the pressure jaws can be rotated by up to 90 °.
  • An advantageous embodiment of a stone splitting device is described below, which is particularly suitable for the use of the pressure jaws designed according to the invention.
  • the sliding wedge is spade or hammer-shaped in accordance with the pressure jaws.
  • the slide wedge preferably has a width corresponding to the width of the insert section of the pressure jaws over its entire length protruding from the cylinder or lower cylinder part in the retracted or retracted state.
  • the width of the pressure jaws in the lower area of application corresponds to at least approximately twice the borehole diameter.
  • the width of the pressure jaws in this region is preferably approximately three times the borehole diameter.
  • the measures according to claim 5 serve to further increase the stability of the "pressure jaw / sliding wedge" unit.
  • Lower part 2 is guided in a longitudinally displaceable manner.
  • a guide sleeve 5 made of wear-resistant bearing material is arranged at the free lower end of the piston rod 3. The bearing sleeve 5 is locked at the free lower end of the piston rod 3 by means of a retaining pin 31 and a helical spring 6.
  • a sliding wedge 18 is fastened by means of a retaining bolt 4 which penetrates both it and the piston rod 3.
  • the sliding wedge 18 acts on pressure jaws or shells 17 which can be inserted into boreholes, can be moved laterally to a limited extent and are releasably connected to the lower cylinder part 2 by means of reinforced head pieces 32 and which have an inclination corresponding to the inclination of the sliding wedge.
  • the pressure jaws 17 are suspended on cross bolts 10 arranged diametrically in the lower cylinder part 2 and are elastically fixed and centered with spring elements 13, 24.
  • the laterally limited displaceability of the pressure jaws 17 is achieved in that they are slidably mounted on the cross pin 10, namely on the inner portions 20 of the cross pin 10, which in the embodiment shown have a slightly smaller diameter than the outer portions 21, the serve as a thread and bearing part.
  • the transverse bolts 10 are arranged so as to be displaceable in the longitudinal direction of the bolt between an outer pressure jaw release position (bottom in FIG. 1) and an inner pressure jaw suspension position (FIG. 1 top) in such a way that in the former the pressure jaws 17 downward - to the right in FIG. 1 - Can be pulled out of the cylinder base 2 without rotation about its longitudinal axes or lateral pivoting and vice versa.
  • the stone splitting device described is suitable, inter alia, for the use of approximately spade-shaped pressure jaws, as shown in FIGS. 2 and 3.
  • the sliding wedge 18 is formed like a spade in accordance with the pressure jaws 17, the width corresponding approximately to the width of the lower insert area 34 of the pressure jaws 17.
  • the sliding wedge is also spade-shaped. As a rule, you will even use a normal, relatively narrow sliding wedge that is adapted to the width of the pressure jaws normally used.
  • the two opposite sliding surfaces of the sliding wedge 18 each have an axially extending spring 35 and the associated sliding or inclined surfaces of the pressure jaws 17 have corresponding grooves 36. In this way, a relative lateral displacement of the between the pressure jaws 17 and the sliding wedge 18 is reliably avoided during use.
  • the borehole with the reference number 38 and the adjoining gap which is obtained when conventional pressure jaws inserted into the borehole 38 are spread or moved apart, are identified by the reference number 37.
  • the stone splitting device can be used without further ado thanks to the pressure jaws designed according to the invention.
  • the outer sides of the pressure jaws are preferably roughened, ribbed or knurled in the lower insert area 34 in order to prevent them sliding sideways within the gap 37.
  • the width of the pressure jaws 17 in the lower area of use 34 corresponds to at least approximately twice the borehole diameter.
  • the handling in particular the insertion of the pressure jaws 17 into the gap 37, can be facilitated by the fact that the outer sides of the pressure jaws 17 facing away from one another in the assembled state are slightly convex in section transversely to the axial direction.
  • the lower area of use 34 of the pressure jaws 17 can also be hammer-shaped or sickle-shaped. This essentially depends on the depth of use and the rock to be broken. However, the most stable and effective is a spade-shaped shape of the pressure jaws.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Crushing And Grinding (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

1. Pressure jaws or shells for a device for the mechanical splitting of rock, having a cylinder (1), in which a hydraulically actuatable piston having a piston rod (3) is arranged so as to be longitudinally movable, by means of which piston rod a sliding wedge (18) arranged between the pressure jaws (17) can be displaced, the pressure jaws (17), which can be inserted into boreholes, being supported in the cylinder block or in a cylinder lower part (2), which is arranged releasably on the latter, so as to be exchangeable and movable laterally to a limited extend and at the respective sides facing the sliding wedge (18), having an obliquity which corresponds to the inclination of the sliding wedge (18), characterized in that the pressure jaws (17) are of approximately spade-or hammer-shaped design.

Description

Die Erfindung betrifft Druckbacken bzw. -schalen für ein Gerät zum mechanischen Zerlegen von Gestein mit einem Zylinder, in dem ein hydraulisch betätigbarer Kolben mit einer Kolbenstange längsbeweglich angeordnet ist, mittels der ein zwischen den Druckbacken angeordneter Gleitkeil verschiebbar ist, wobei die in Bohrlöcher einsetzbaren Druckbacken im Zylinderblock oder in einem an diesem lösbar angeordneten Zylinder-Unterteil auswechselbar und seitlich beschränkt bewegbar gelagert sind sowie an ihren dem Gleitkeil jeweils zugewandten Seiten eine der Neigung des Gleitkeils entsprechende Schrägung aufweisen.The invention relates to pressure jaws or shells for a device for mechanical disassembly of rock with a cylinder in which a hydraulically actuated piston with a piston rod is arranged to be longitudinally movable, by means of which a sliding wedge arranged between the pressure jaws is displaceable, the pressure jaws which can be inserted into boreholes are interchangeably mounted in the cylinder block or in a cylinder lower part which is detachably arranged thereon and can be moved laterally to a limited extent, and on their sides facing the sliding wedge each have a slope corresponding to the inclination of the sliding wedge.

Steinspaltgeräte der genannten Art sind allgemein bekannt (DE-AS-1 254 562; DE-PS-1 783 155). Mit derart ausgebildeten, relativ handlichen Geräten können Kräfte in der Größenordnung von 300 t und mehr erzeugt werden. Die Verwendung von Sprengstoffen ist zum Herauslösen von Gesteinsbrocken oder Zerlegen derselben nicht mehr erforderlich.Stone splitting devices of the type mentioned are generally known (DE-AS-1 254 562; DE-PS-1 783 155). Forces of the order of magnitude of 300 t and more can be generated with such relatively handy devices. The use of explosives is no longer necessary to remove rocks or break them up.

In der Praxis wird dabei wie folgt vorgegangen:

  • (a) Längs der gewünschten Bruchlinie.bzw. -fläche werden in je nach zu brechendem Gestein in mehr oder weniger großen Abständen zunächst Löcher bis zu einer Tiefe gebohrt, die der Höhe bzw. Breite der Bruchfläche entspricht.
  • (b) Anschließend werden in diese Löcher die eingangs genannten Geräte mit ihren Druckbacken eingesetzt und betätigt, so daß eine Spreizung bzw. Auseinanderbewegung der Druckbacken erfolgt und sich dabei ausgehend von den Bohrlöchern ein erster schmaler Spalt in Richtung der Bohrlochreihe ausbildet. Dieser Spalt erstreckt sich jedoch noch nicht über die gesamte Länge der Bohrlöcher, d.h. die gesamte Breite der gewünschten Bruchfläche.
  • (c) Die verwendeten Druckbacken werden dann durch größere Druckbacken ersetzt in Anpassung an die im oberen Bereich erweitereten Bohrlöcher, in diese wieder eingesetzt und auseinanderbewegt, so daß eine Erweiterung des Spalts bzw. eine vollständige Ausbildung der Bruchfläche erfolgt. Diese Prozedur kann noch einoder zweimal - je nach Höhe bzw. Breite der Bruchfläche - wiederholt werden.
In practice, the procedure is as follows:
  • (a) Along the desired break line. Depending on the rock to be broken, holes are first drilled at more or less large intervals to a depth that corresponds to the height or width of the fracture surface.
  • (b) The devices mentioned at the outset are then inserted and actuated with their pressure jaws in these holes, so that the pressure jaws spread or move apart and a first narrow gap is formed in the direction of the row of boreholes from the boreholes. However, this gap does not yet extend over the entire length of the boreholes, ie the entire width of the desired fracture surface.
  • (c) The pressure jaws used are then replaced by larger pressure jaws in adaptation to the boreholes widened in the upper region, reinserted in these and moved apart, so that the gap is expanded or the fracture surface is completely formed. This procedure can be repeated one or two times, depending on the height or width of the fracture surface.

Leider kommt es sehr häufig bereits bei der Ausbildung des ersten schmalen Spalts zu relativen Verschiebungen des Gesteins in Richtung der Bohrlochreihe mit der Folge, daß in die Bohrlöcher größere Druckbacken nicht mehr eingesetzt werden können. Die Ausbildung der vollständigen Bruchfläche muß dann in herkömmlicher Manier mittels in den Spalt eingetriebener Keile erfolgen.Unfortunately, there is very often a relative displacement of the rock in the direction of the row of boreholes during the formation of the first narrow gap, with the result that larger pressure jaws can no longer be inserted into the boreholes. The complete fracture surface must then be formed in the conventional manner by means of wedges driven into the gap.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, Druckbacken bzw. -schalen für ein Gerät der eingangs genannten Art zu schaffen, die auch bei relativen Verschiebungen des Gesteins in Richtung der Bohrlochreihe problemlos einsetzbar sind, so daß auf manuell eintreibbare Spaltkeile verzichtet werden kann.The present invention has for its object to provide pressure jaws or shells for a device of the type mentioned, which can be used even with relative displacements of the rock in the direction of the row of holes, so that manually driven riving knife can be dispensed with.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Druckbacken etwa spaten- oder hammerförmig ausgebildet sind. Trotz des genannten Problems, das bereits seit Jahrzehnten, d.h. seit dem ersten Einsatz der genannten Steinspaltgeräte, existiert, ist bis jetzt von keiner Seite vorgeschlagen worden, die Druckbacken in der erfindungsgemäßen Weise auszubilden, um die genannten Steinverschiebungsprobleme zu überwinden. Natürlich bedarf der Einsatz der erfindungsgemäß ausgebildeten Druckbacken bzw. -schalen einer entsprechenden Anpassung des verwendeten Steinspaltgerätes, nämlich hinsichtlich des Fixierungsmechanismus für die Druckbacken. Dieser Mechanismus muß so ausgebildet sein, daß die Druckbacken beim Fixieren am Zylinder bzw. Zylinder-Unterteil nicht verdreht werden müssen oder zumindest sich soweit vom Gleitkeil wegschwenken lassen, daß eine Fixierdrehung der Druckbacken bis zu 90° möglich ist. Weiter unten wird eine vorteilhafte Ausführungsform eines Steinspaltgeräts beschrieben, das sich für den Einsatz der erfindungsgemäß ausgebildeten Druckbacken besonders eignet.This object is achieved in that the pressure jaws are approximately spade or hammer-shaped. Despite the problem mentioned, which has been going on for decades, i.e. Since the first use of the stone splitting devices mentioned has existed, it has not yet been suggested by either side to design the pressure jaws in the manner according to the invention in order to overcome the stone displacement problems mentioned. Of course, the use of the pressure jaws or shells designed according to the invention requires a corresponding adaptation of the stone splitting device used, namely with regard to the fixing mechanism for the pressure jaws. This mechanism must be designed in such a way that the pressure jaws do not have to be rotated when fixing them to the cylinder or cylinder lower part, or at least can be pivoted away from the sliding wedge to such an extent that the pressure jaws can be rotated by up to 90 °. An advantageous embodiment of a stone splitting device is described below, which is particularly suitable for the use of the pressure jaws designed according to the invention.

Zur besseren Kraftübertragung und zur Vermeidung von Druckbacken-Verbiegungen, d.h. zur Erhöhung der Stabilität der Einheit "Druckbacken/Gleitkeil" ist der Gleitkeil entsprechend den Druckbacken spaten- oder hammerförmig ausgebildet. Vorzugsweise weist der Gleitkeil über seine gesamte, im eingezogenen bzw. zurückgezogenen Zustand aus dem Zylinder bzw. Zylinder-Unterteil herausragende Länge eine Breite auf, die der Breite des Einsatzabschnitts der Druckbacken entspricht.For better power transmission and to avoid pressure jaw bending, i.e. To increase the stability of the unit "pressure jaws / sliding wedge", the sliding wedge is spade or hammer-shaped in accordance with the pressure jaws. The slide wedge preferably has a width corresponding to the width of the insert section of the pressure jaws over its entire length protruding from the cylinder or lower cylinder part in the retracted or retracted state.

In der Praxis hat sich als besonders vorteilhaft herausgestellt, wenn die Breite der Druckbacken im unteren Einsatzbereich mindestens etwa dem doppelten Bohrlochdurchmesser entspricht. Vorzugsweise beträgt die Breite der Druckbacken in diesem Bereich etwa dem dreifachen Bohrlochdurchmesser.In practice, it has been found to be particularly advantageous if the width of the pressure jaws in the lower area of application corresponds to at least approximately twice the borehole diameter. The width of the pressure jaws in this region is preferably approximately three times the borehole diameter.

Zur weiteren Erhöhung der Stabilität der Einheit "Druckbacken/Gleitkeil" dienen die Maßnahmen nach dem Patentanspruch 5.The measures according to claim 5 serve to further increase the stability of the "pressure jaw / sliding wedge" unit.

Eine bessere Einführung der Druckbacken in den Spalt und damit leichtere Handhabung läßt sich durch die Maßnahmen nach Patentanspruch 5 erzielen.A better introduction of the pressure jaws into the gap and thus easier handling can be achieved by the measures according to claim 5.

Nachstehend wird ein bevorzugtes Ausführungsbeispiel der erfindungsgemäßen Druckbacken in Verbindung mit einem für den Einsatz dieser Druckbacken besonders geeigneten Steinspaltgerät anhand der beigefügten Zeichnung näher beschrieben. Es zeigen:

  • Fig. 1 eine Ausführungsform eines Steinspaltgerätes, das sich für den Einsatz der erfindungsgemäßen Druckbacken besonders eignet, im Längsschnitt, teilweise in Ansicht,
  • Fig. 2 eine Draufsicht auf die Einheit "Druckbacken/ Gleitkeil" in Richtung des Pfeiles C in Fig.1 in verkleinertem Maßstab, und Fig. 3 die Einheit "Druckbacken/Gleitkeil" im Querschnitt längs Linie D - D in Fig. 2.
A preferred exemplary embodiment of the pressure jaws according to the invention is described in more detail below in conjunction with a stone splitting device which is particularly suitable for the use of these pressure jaws, using the attached drawing. Show it:
  • 1 shows an embodiment of a stone splitting device, which is particularly suitable for the use of the pressure jaws according to the invention, in longitudinal section, partly in view,
  • 2 shows a plan view of the "pressure jaw / sliding wedge" unit in the direction of arrow C in FIG. 1 on a reduced scale, and FIG. 3 shows the "pressure jaw / sliding wedge" unit in cross section along line D - D in FIG. 2.

Das in Fig. 1 dargestellte hydraulische Gerät zum mechanischen Zerlegen von Gestein umfaßt einen Zylinder 1 aus Aluminium, in dem ein hydraulisch betätigbarer, nicht dargestellter Kolben mit einer Kolbenstange 3 längsbeweglich angeordnet ist, wobei die Kolbenstange 3 in einem in den Zylinder 1 eingeschraubten Zylinder-Unterteil 2 längsverschieblich geführt ist. Zum Zwecke der Führung der Kolbenstange 3 im Zylinder-Unterteil 2, der ebenfalls vorzugsweise aus Aluminium besteht, ist am freien unteren Ende der Kolbenstange 3 eine Führungshülse 5 aus verschleißfestem Lagerwerkstoff angeordnet. Die Arretierung der Lagerhülse 5 am freien unteren Ende der Kolbenstange 3 erfolgt mittels eines Haltestiftes 31 und einer Schraubenfeder 6.1 comprises a cylinder 1 made of aluminum, in which a hydraulically actuated piston, not shown, with a piston rod 3 is arranged to be longitudinally movable, the piston rod 3 being in a cylinder screwed into the cylinder 1. Lower part 2 is guided in a longitudinally displaceable manner. For the purpose of guiding the piston rod 3 in the lower cylinder part 2, which is also preferably made of aluminum, a guide sleeve 5 made of wear-resistant bearing material is arranged at the free lower end of the piston rod 3. The bearing sleeve 5 is locked at the free lower end of the piston rod 3 by means of a retaining pin 31 and a helical spring 6.

Am freien unteren Ende der Kolbenstange 3 ist ein Gleitkeil 18 mittels eines sowohl ihn als auch die Kolbenstange 3 durchgreifenden Haltebolzens 4 befestigt. Der Gleitkeil 18 wirkt auf in Bohrlöcher einsetzbare, seitlich beschränkt verschiebbare und mittels verstärkter Kopfstücke 32 lösbar mit dem Zylinder-Unterteil 2 verbundene Druckbacken bzw. -schalen 17 ein, die eine der Neigung des Gleitkeils entsprechende Schrägung aufweisen. Die Druckbacken 17 sind auf diametral im Zylinder-Unterteil 2 angeordneten Querbolzen 10 eingehängt und mit Federelementen 13, 24 elastisch fixiert und zentriert. Die seitlich beschränkte Verschiebbarkeit der Druckbacken 17 wird dadurch erreicht, daß sie auf den Querbolzen 10 verschiebbar gelagert sind, und zwar auf den jeweils innenliegenden Abschnitten 20 der Querbolzen 10, die bei der dargestellten Ausführungsform einen etwas geringeren Durchmesser aufweisen als die äußeren Abschnitte 21, die als Gewinde- und Lagerteil dienen. Die Querbolzen 10 sind in Bolzenlängsrichtung versetzbar angeordnet zwischen einer äußeren Druckbacken-Freigabestellung (in Fig. 1 unten) und einer inneren Druckbacken-Einhängestellung (Fig. 1 oben) derart, daß in ersterer die Druckbacken 17 nach unten - in Fig. 1 nach rechts - aus dem Zylinder-Unterteil 2 ohne Drehung um ihre Längsachsen oder seitliches Verschwenken herausziehbar sind und umgekehrt.At the free lower end of the piston rod 3, a sliding wedge 18 is fastened by means of a retaining bolt 4 which penetrates both it and the piston rod 3. The sliding wedge 18 acts on pressure jaws or shells 17 which can be inserted into boreholes, can be moved laterally to a limited extent and are releasably connected to the lower cylinder part 2 by means of reinforced head pieces 32 and which have an inclination corresponding to the inclination of the sliding wedge. The pressure jaws 17 are suspended on cross bolts 10 arranged diametrically in the lower cylinder part 2 and are elastically fixed and centered with spring elements 13, 24. The laterally limited displaceability of the pressure jaws 17 is achieved in that they are slidably mounted on the cross pin 10, namely on the inner portions 20 of the cross pin 10, which in the embodiment shown have a slightly smaller diameter than the outer portions 21, the serve as a thread and bearing part. The transverse bolts 10 are arranged so as to be displaceable in the longitudinal direction of the bolt between an outer pressure jaw release position (bottom in FIG. 1) and an inner pressure jaw suspension position (FIG. 1 top) in such a way that in the former the pressure jaws 17 downward - to the right in FIG. 1 - Can be pulled out of the cylinder base 2 without rotation about its longitudinal axes or lateral pivoting and vice versa.

Das beschriebene Steinspaltgerät eignet sich unter anderem für den Einsatz von etwa spatenförmig ausgebildeten Druckbacken, wie sie in den Fig. 2 und 3 dargestellt sind. Bei der dort dargestellten Ausführungsform ist der Gleitkeil 18 entsprechend den Druckbacken 17 spatenförmig ausgebildet, wobei die Breite etwa der Breite des unteren Einsatzbereiches 34 der Druckbacken 17 entspricht. Es ist jedoch nicht notwendig, daß der Gleitkeil ebenfalls spatenförmig ausgebildet ist. In der Regel wird man sogar einen ganz normalen, relativ schmalen Gleitkeil benutzen, der der Breite der normalerweise benutzten Druckbacken angepaßt ist.The stone splitting device described is suitable, inter alia, for the use of approximately spade-shaped pressure jaws, as shown in FIGS. 2 and 3. In the embodiment shown there, the sliding wedge 18 is formed like a spade in accordance with the pressure jaws 17, the width corresponding approximately to the width of the lower insert area 34 of the pressure jaws 17. However, it is not necessary that the sliding wedge is also spade-shaped. As a rule, you will even use a normal, relatively narrow sliding wedge that is adapted to the width of the pressure jaws normally used.

Die beiden gegenüberliegenden Gleitflächen des Gleitkeils 18 weisen jeweils eine axial verlaufende Feder 35 und die zugeordneten Gleit- bzw. Schrägflächen der Druckbacken 17 entsprechende Nuten 36 auf. Auf diese Weise wird eine relative seitliche Verschiebung des zwischen den Druckbacken 17 und dem Gleitkeil 18 beim Einsatz sicher vermieden.The two opposite sliding surfaces of the sliding wedge 18 each have an axially extending spring 35 and the associated sliding or inclined surfaces of the pressure jaws 17 have corresponding grooves 36. In this way, a relative lateral displacement of the between the pressure jaws 17 and the sliding wedge 18 is reliably avoided during use.

In Fig. 3 sind das Bohrloch mit der Bezugsziffer 38 und der sich daran anschließende Spalt, der beim Spreizen bzw. Auseinanderbewegen von in das Bohrloch 38 eingesetzten herkömmlichen Druckbacken erhalten wird, mit der Bezugsziffer 37 gekennzeichnet.In FIG. 3, the borehole with the reference number 38 and the adjoining gap, which is obtained when conventional pressure jaws inserted into the borehole 38 are spread or moved apart, are identified by the reference number 37.

Ferner ist in Fig. 3 eine Verschiebung des Gesteins in Spaltrichtung bzw. in Richtung der Bohrlochreihe dargestellt. Man sieht, daß trotz dieser Verschiebung das Steinspaltgerät dank der erfindungsgemäß ausgebildeten Druckbacken ohne weiteres einsetzbar ist. Vorzugsweise sind die Ausenseiten der Druckbacken im unteren Einsatzbereich 34 aufgerauht, gerippt oder gerändelt, um ein seitliches Abgleiten innerhalb des Spaltes 37 zu vermeiden.3 shows a displacement of the rock in the direction of the fracture or in the direction of the row of boreholes. It can be seen that, despite this displacement, the stone splitting device can be used without further ado thanks to the pressure jaws designed according to the invention. The outer sides of the pressure jaws are preferably roughened, ribbed or knurled in the lower insert area 34 in order to prevent them sliding sideways within the gap 37.

In der Praxis hat sich als besonders vorteilhaft herausgestellt, wenn die Breite der Druckbacken 17 im unteren Einsatzbereich 34 mindestens etwa dem doppelten Bohrlochdurchmesser entspricht.In practice it has been found to be particularly advantageous if the width of the pressure jaws 17 in the lower area of use 34 corresponds to at least approximately twice the borehole diameter.

Schließlich kann die Handhabung, insbesondere das Einsetzen der Druckbacken 17 in den Spalt 37 dadurch erleichtert werden, daß die im montierten Zustand einander abgewandten Außenseiten der Druckbacken 17 im Schnitt quer zur Axialrichtung geringfügig konvex nach außen gewölbt sind.Finally, the handling, in particular the insertion of the pressure jaws 17 into the gap 37, can be facilitated by the fact that the outer sides of the pressure jaws 17 facing away from one another in the assembled state are slightly convex in section transversely to the axial direction.

Der untere Einsatzbereich 34 der Druckbacken 17 kann auch hammer- oder sichelförmig ausgebildet sein. Dies hängt im wesentlichen von der Einsatztiefe und dem zu brechenden Gestein ab. Am stabilsten und wirkungsvollsten ist jedoch eine spatenförmige Gestalt der Druckbakken.The lower area of use 34 of the pressure jaws 17 can also be hammer-shaped or sickle-shaped. This essentially depends on the depth of use and the rock to be broken. However, the most stable and effective is a spade-shaped shape of the pressure jaws.

Claims (5)

1. Pressure jaws or shells for a device for the mechanical splitting of rock, having a cylinder (1), in which a hydraulically actuatable piston having a piston rod (3) is arranged so as to be longitudinally movable, by means of which piston rod a sliding wedge (18) arranged between the pressure jaws (17) can be displaced, the pressure jaws (17), which can be inserted into boreholes, being supported in the cylinder block or in a cylinder lower part (2), which is arranged releasably on the latter, so as to be exchangeable and movable laterally to a limited extent and, at the respetive sides facing the sliding wedge (18), having an obliquity which corresponds to the inclination of the sliding wedge (18), characterized in that the pressure jaws (17) are of approximately spade-or hammer-shaped design.
2. Pressure jaws according to Claim 1, characterized in that their width in the lower insertion region (34) corresponds at least approximately to twice the diameter of the borehole.
3. Pressure jaws according to Claim 1 or 2, characterized in that their outsides in the lower insertion region (34) are in each cage roughened, ribbed or knurled
4. Pressure jaws according to one of Claims 1 to 3, characterized in that their sliding surfaces facing the sliding wedge (18) in each case have at least one axially extending groove (36) which corresponds to correspondingly formed keys (35) on the sliding surfaces of the sliding wedge (18), or vice versa, so that a lateral relative movement between sliding wedge (18) and pressure jaws (17) during insertion is avoided.
5. Pressure jaws according to one of Claims 1 to 4, characterized in that, in section transverse to the axial direction, their outsides, which, in the assembled condition, face away from one another, curve convexly outwards or are crowned.
EP84111848A 1983-10-21 1984-10-03 Jaws or shells for a hydraulically driven mechanical rock-splitting apparatus Expired EP0142685B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111848T ATE40845T1 (en) 1983-10-21 1984-10-03 PRESSURE JAWS RESPECTIVELY - SHELLS FOR A HYDRAULIC DEVICE FOR THE MECHANICAL BREAKING UP OF ROCK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3338368 1983-10-21
DE3338368A DE3338368C2 (en) 1983-10-21 1983-10-21 Pressure jaws or shells for a hydraulically operated device for the mechanical dismantling of rock

Publications (3)

Publication Number Publication Date
EP0142685A2 EP0142685A2 (en) 1985-05-29
EP0142685A3 EP0142685A3 (en) 1986-11-20
EP0142685B1 true EP0142685B1 (en) 1989-02-15

Family

ID=6212472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111848A Expired EP0142685B1 (en) 1983-10-21 1984-10-03 Jaws or shells for a hydraulically driven mechanical rock-splitting apparatus

Country Status (3)

Country Link
EP (1) EP0142685B1 (en)
AT (1) ATE40845T1 (en)
DE (2) DE3338368C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2655587A1 (en) * 1989-12-11 1991-06-14 Koehl Jean Marie Percussive tool head such as a spade, chisel etc. with a groove for evacuating dust
CN103967491B (en) * 2014-04-21 2016-08-17 宁波奉金东旭工程机械科技有限公司 Fluid pressure type catalase rifle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2328661A (en) * 1941-03-10 1943-09-07 Joseph F Maloney Breaking device
DE1254562B (en) * 1964-07-28 1967-11-23 Helmut Darda Hydraulic stone explosive device
DE1239259B (en) * 1965-11-29 1967-04-27 Wilhelm Dahmen Tauch Und Spren Driving chisel for driving apart rock masses prepared with boreholes
DE1783155C2 (en) * 1965-12-07 1975-05-15 Helmut 7712 Blumberg Darda Hydraulic stone explosive device
DE3131639C2 (en) * 1981-08-11 1984-12-20 H. Bieri AG Maschinenfabrik, Liebefeld, Bern Hydraulic splitting device

Also Published As

Publication number Publication date
ATE40845T1 (en) 1989-03-15
DE3338368C2 (en) 1985-10-31
DE3338368A1 (en) 1985-05-02
EP0142685A3 (en) 1986-11-20
DE3476776D1 (en) 1989-03-23
EP0142685A2 (en) 1985-05-29

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