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EP0362481A2 - Boring ram - Google Patents

Boring ram Download PDF

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Publication number
EP0362481A2
EP0362481A2 EP89111905A EP89111905A EP0362481A2 EP 0362481 A2 EP0362481 A2 EP 0362481A2 EP 89111905 A EP89111905 A EP 89111905A EP 89111905 A EP89111905 A EP 89111905A EP 0362481 A2 EP0362481 A2 EP 0362481A2
Authority
EP
European Patent Office
Prior art keywords
housing
intermediate piece
boring machine
machine according
ram boring
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.)
Granted
Application number
EP89111905A
Other languages
German (de)
French (fr)
Other versions
EP0362481B1 (en
EP0362481A3 (en
Inventor
Alfons Dipl.-Ing. Hesse
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.)
Schmidt Paul Dipl-Ing
Original Assignee
Schmidt Paul Dipl-Ing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schmidt Paul Dipl-Ing filed Critical Schmidt Paul Dipl-Ing
Publication of EP0362481A2 publication Critical patent/EP0362481A2/en
Publication of EP0362481A3 publication Critical patent/EP0362481A3/en
Application granted granted Critical
Publication of EP0362481B1 publication Critical patent/EP0362481B1/en
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Classifications

    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • E21B4/145—Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole

Definitions

  • the invention relates to a ram boring machine with an impact tube which is axially movable in a housing and controlled in its movement by a control tube connected to a compressed air hose and mounted in an elastic intermediate piece arranged in the housing.
  • a ram boring machine of this type is known from U.S. Patent 3,995,702.
  • the elastic intermediate piece acts as a damping block and absorbs inevitable shocks and vibrations when the device is in operation; these influences should be kept as far as possible from the reversal.
  • the assembly i.e. the installation and removal of this damping block, however, requires complex handling and has considerable disadvantages, because the ring-like damping block is accommodated between a sleeve screwed onto the head tube and an end piece screwed into the rear end of the device housing and in its installed position secured.
  • both the damping block and the end piece and the sleeve must be threaded, which requires additional manufacturing effort.
  • the screw connection particularly when loosening after the device has been in operation for a while, presents considerable difficulties, not least due to the adverse contamination, which favors dirt flows in the production of boreholes in the ground, and are still increasing in the large devices up to 450 mm in diameter.
  • the screw parts usually provided with a sensitive fine thread and also often additionally glued to each other When removing the block, this gluing must then be released by heating at least the threaded sections of the screw parts, so that heat-related damage to the damping block cannot be ruled out.
  • ram boring machines have a head tube screwed into the rear end of the housing.
  • the head tube is either in one piece and has an end piece with an external thread that has axial air outlet openings that run concentrically to the head tube, or the end piece is a part that is separate from the head tube and is screwed onto the rear end of the head tube and together with the head tube into the housing end is screwed in. So that the end piece does not come loose from the head tube or the housing, the threads of these devices are also provided with a metal adhesive before screwing in. To remove the end piece, the machine housing must also be heated in the threaded area and the adhesive connection must be destroyed. The screw connection can then be loosened and unscrewed using the appropriate wrench and, if necessary, additional strong hammer blows. This type of connection of the head tube to the housing has various disadvantages.
  • the head tube must be fixed with respect to the machine housing and the percussion piston exactly in the axial direction to prevent leaks between the field piston and head tube, as well as avoid jamming and excessive wear between the head tube and the percussion piston.
  • this is difficult to achieve with non-centered threaded connections.
  • the disassembly described frequently leads to damage to the intermediate piece and the housing. Due to the rigid connection between the housing, the intermediate piece and the head tube, the vibrations and shocks caused by the rapid piston strokes are transmitted undamped to the head tube and the connection to the compressed air hose. Long periods of use and difficult operating conditions can cause vibrations to break, particularly in the rear area of the ram drilling machine housing.
  • the compressed air hose can also detach from the head tube, so that it generally has to be permanently connected to the head tube by means of a compression sleeve.
  • the invention has for its object to avoid the aforementioned disadvantages of known ram boring machines and in particular to improve the assembly of an elastic intermediate piece or suspension block and also to keep shocks and vibrations away from the compressed air hose.
  • the elastic intermediate piece on the head tube and / or in the housing is held axially by radial projections, so that threads for attaching the intermediate piece to the housing and head tube are not required.
  • the adapter is easy to install and only needs to be inserted into the housing.
  • the elasticity of the intermediate piece is sufficient and ensures that the head of the head tube adapts to the percussion piston; an exact axial alignment of the head tube is no longer necessary.
  • a front, radially circumferential projection can be arranged in the housing, against which the front end of the intermediate piece lies.
  • the rear end of the intermediate piece can either be fixed by a stop edge of the housing, which is created by flanging the housing end, or a groove is arranged in the rear of the housing, into which a locking ring engages.
  • a pressure plate can be arranged between the intermediate piece and the securing ring.
  • the pressure plate In the case of an advantageous multi-part locking ring, it is advisable to provide the pressure plate with a locking edge.
  • the securing edge which consists of at least two ring segments, prevents the ring from falling inwards.
  • the locking ring can be of any cross-section, but advantageously round.
  • the intermediate piece can consist of an elastomer ring with axial air outlet openings; it can easily be pushed over the circumferential locking projection on the head tube.
  • the compressed air hose can advantageously be attached to the control tube by means of a screw coupling. Overall, the ram boring machine has a longer service life.
  • the rear end of the ram boring machine consists of a housing 1 in which a percussion piston 2 moves back and forth.
  • the percussion piston movement is controlled by means of a control tube 3, to which compressed air is supplied via a compressed air hose 6.
  • the control tube 3 is connected to the housing 1 by means of an intermediate piece 4.
  • the intermediate piece 4 consists of an elastic material, e.g. Rubber or polyurethane, and prevents the impacts and vibrations transmitted by the percussion piston 2 to the housing 1 from reaching the control tube 3 and the compressed air hose 6 without damping.
  • the compressed air supplied through a bore in the control tube 3 escapes into the atmosphere after the working strokes of the percussion piston 2 via axial air outlet openings 5 of the intermediate piece 4 which are concentric with the control tube 3.
  • the compressed air hose 6 is connected to the control tube 3 by means of a screw coupling 7.
  • the intermediate piece 4 is fixed on the head tube 3 by a front, radial, circumferential projection 10 and a rear, radial, circumferential projection 11 in the axial direction. Similarly, the intermediate piece 4 is fixed in the rear end of the housing 1. Namely, the housing 1 has a front, radial, circumferential projection 12 and a rear, radial, circumferential projection 13.
  • the intermediate piece 4 has an inner and an outer metal sleeve 8, 9, for example fastened by vulcanization. These metal sleeves 8, 9 support the secure axial fit of the intermediate piece 4 relative to the housing 1 and the head tube 3.
  • an elastic securing ring 14 inserted after the insertion of the intermediate piece 4 Groove 15 of the housing 1. This retaining ring 14 can be removed again with the intermediate piece 4 for dismantling the head tube 3.
  • the locking ring 16 has a round cross section, and a pressure plate 17 is arranged between the locking ring 16 and the intermediate piece 4, which ensures a flat contact with the intermediate piece 4.
  • the pressure plate 17 is provided with a securing edge, which prevents the possibly multi-part locking ring 16 from being mounted radially, i.e. collapses inside.

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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)
  • Earth Drilling (AREA)

Abstract

In a boring ram having a percussion piston (2) which is axially moveable in a housing (1) and is controlled in its movement by a control tube (3) connected to a compressed-air hose (6) and mounted in an elastic intermediate piece (4) arranged in the housing (1), in which the elastic intermediate piece (4) is arranged on the control tube (3) and/or in the housing (1), assembly of the intermediate piece (4) is simplified. In addition, less damage occurs at the housing (1), control tube (3) and compressed-air hose (6), and the control tube (3) is also easier to assemble and dismantle. …<IMAGE>…

Description

Die Erfindung betrifft ein Rammbohrgerät mit einem in einem Gehäuse axial beweglichen, in seiner Bewegung durch ein mit einem Druckluftschlauch verbundenes, in einem im Gehäuse angeordneten elastischen Zwischenstück gelagerten Steuer­rohr gesteuerten Schlagkolben.The invention relates to a ram boring machine with an impact tube which is axially movable in a housing and controlled in its movement by a control tube connected to a compressed air hose and mounted in an elastic intermediate piece arranged in the housing.

Ein Rammbohrgerät dieser Art ist durch die US-PS 3 995 702 bekanntgeworden. Das elastische Zwischenstück wirkt dort als Dämpfungsblock und nimmt beim Betrieb des Gerätes unver­meidliche Erschütterungen und Vibrationen auf; diese Ein­flüsse sollen weitestgehend von der Umsteuerung ferngehal­ten werden. Die Montage, d.h. der Ein- und Ausbau dieses Dämpfungsblockes setzt allerdings aufwendige Handhabungen voraus und bringt erhebliche Nachteile mit sich, denn der ringartige Dämpfungsblock wird zwischen einer auf das Steu­errohr aufgeschraubten Hülse und einem in das rückwärtige Ende des Gerätegehäuses eingeschraubten Endstück aufgenom­men und in seiner Einbaulage gesichert. Somit müssen sowohl der Dämpfungsblock als auch das Endstück und die Hülse mit Gewinde versehen werden, was einen zusätzlichen Fertigungs­aufwand voraussetzt. Abgesehen davon bereitet die Verschrau­bung insbesondere beim Lösen, nachdem das Gerät eine Zeit im Betrieb war, erhebliche Schwierigkeiten, die nicht zu­letzt auf die widrigen, Verschmutzungen begünstigenden Ein­ flüsse beim Herstellen von Bohrungen im Erdreich zurückzu­führen sind, und bei den großen, bis 450 mm Durchmesser reichenden Geräten noch zunehmen. Damit sich die Verschrau­bung aufgrund der Vibrationen nicht lockert bzw. löst, werden die Schraubteile. in der Regel mit einem empfindli­chen Feingewinde versehen und außerdem häufig noch zusätz­ich miteinander verklebt Beim Ausbau des Blockes muß diese Verklebung dann durch Erwärmen zumindest der Gewinde­abschnitte der Schraubteile gelöst werden, so daß hitzebe­dingte Beschädigungen des Dämpfungsblockes nicht auszu­schließen sind.A ram boring machine of this type is known from U.S. Patent 3,995,702. The elastic intermediate piece acts as a damping block and absorbs inevitable shocks and vibrations when the device is in operation; these influences should be kept as far as possible from the reversal. The assembly, i.e. the installation and removal of this damping block, however, requires complex handling and has considerable disadvantages, because the ring-like damping block is accommodated between a sleeve screwed onto the head tube and an end piece screwed into the rear end of the device housing and in its installed position secured. Thus, both the damping block and the end piece and the sleeve must be threaded, which requires additional manufacturing effort. Apart from this, the screw connection, particularly when loosening after the device has been in operation for a while, presents considerable difficulties, not least due to the adverse contamination, which favors dirt flows in the production of boreholes in the ground, and are still increasing in the large devices up to 450 mm in diameter. So that the screw connection does not loosen or loosen due to the vibrations, the screw parts. usually provided with a sensitive fine thread and also often additionally glued to each other When removing the block, this gluing must then be released by heating at least the threaded sections of the screw parts, so that heat-related damage to the damping block cannot be ruled out.

Andere bekannte Rammbohrgeräte weisen ein in das hintere Ende des Gehäuses eingeschraubtes Steuerrohr auf. Das Steu­errohr ist entweder einstückig und besitzt ein Endstück mit Außengewinde, das axiale, konzentrisch zum Steuerrohr ver­laufende Luftaustrittsöffnungen aufweist, oder aber das End­stück ist ein vom Steuerrohr getrenntes Teil, das auf das hintere Ende des Steuerrohrs aufgeschraubt ist und zusammen mit dem Steuerrohr in das Gehäuseende einge­schraubt wird. Damit sich das Endstück nicht vom Steuerrohr bzw. vom Gehäuse löst, werden auch bei diesen Geräten die Gewinde vor dem Einschrauben mit einem Metallkleber ver­sehen. Zum Ausbau des Endstückes muß hierbei das Maschinen­gehäuse ebenfalls im Gewindebereich erwärmt und damit die Klebeverbindung zerstört werden. Anschließend läßt sich die Verschraubung mit Hilfe entsprechender Schraubschlüssel und gegebenenfalls zusätzlicher starker Hammerschläge lösen und herausschrauben. Diese Art der Verbindung des Steuerrohrs mit dem Gehäuse weist verschiedene Nachteile auf.Other known ram boring machines have a head tube screwed into the rear end of the housing. The head tube is either in one piece and has an end piece with an external thread that has axial air outlet openings that run concentrically to the head tube, or the end piece is a part that is separate from the head tube and is screwed onto the rear end of the head tube and together with the head tube into the housing end is screwed in. So that the end piece does not come loose from the head tube or the housing, the threads of these devices are also provided with a metal adhesive before screwing in. To remove the end piece, the machine housing must also be heated in the threaded area and the adhesive connection must be destroyed. The screw connection can then be loosened and unscrewed using the appropriate wrench and, if necessary, additional strong hammer blows. This type of connection of the head tube to the housing has various disadvantages.

Das Steuerrohr muß mit Bezug auf das Maschinengehäuse und den Schlagkolben genau zentrisch in Achsrichtung verlaufend befestigt werden, um Undichtigkeiten zwischen dem Schlag­ kolben und dem Steuerrohr sowie ein Klemmen und übermäßige Abnutzung zwischen dem Steuerrohr und dem Schlagkolben zu vermeiden. Dies ist jedoch mit nicht zentrierenden Ge­windeverbindungen nur schwierig zu erreichen. Des weiteren führt die beschriebene Demontage dem Steuerrohrs häufig zu Beschädigungen des Zwischenstücks und- des Gehäuses. Auf­grund der starren Verbindung zwischen dem Gehäuse, dem Zwischenstück und dem Steuerrohr werden die durch die schnellen Kolbenschläge hervorgerufenen Schwingungen und Stöße ungedämpft auf das Steuerrohr und die Verbindung mit dem Druckluftschlauch übertragen. Bei längerem Einsatz und schwierigen Einsatzbedingungen können Schwingungsbrüche auf­treten, insbesondere im hinteren Bereich des Gehäuses des Rammbohrgerätes. Auch kann sich der Druckluftschlauch vom Steuerrohr lösen, so daß dieser im allgemeinen mittels einer Verpreßhülse unlösbar mit dem Steuerrohr verbunden sein muß.The head tube must be fixed with respect to the machine housing and the percussion piston exactly in the axial direction to prevent leaks between the field piston and head tube, as well as avoid jamming and excessive wear between the head tube and the percussion piston. However, this is difficult to achieve with non-centered threaded connections. Furthermore, the disassembly described frequently leads to damage to the intermediate piece and the housing. Due to the rigid connection between the housing, the intermediate piece and the head tube, the vibrations and shocks caused by the rapid piston strokes are transmitted undamped to the head tube and the connection to the compressed air hose. Long periods of use and difficult operating conditions can cause vibrations to break, particularly in the rear area of the ram drilling machine housing. The compressed air hose can also detach from the head tube, so that it generally has to be permanently connected to the head tube by means of a compression sleeve.

Der Erfindung liegt die Aufgabe zugrunde, die vorgenannten Nachteile bekannter Rammbohrgeräte zu vermeiden und insbe­sondere die Montage eines elastischen Zwischenstücks bzw. Federungsblockes zu verbessern sowie außerdem Schläge und Schwingungen auch vom Druckluftschlauch fernzuhalten.The invention has for its object to avoid the aforementioned disadvantages of known ram boring machines and in particular to improve the assembly of an elastic intermediate piece or suspension block and also to keep shocks and vibrations away from the compressed air hose.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das elastische Zwischenstück am Steuerrohr und/oder im Gehäuse durch radiale Vorsprünge axial gehalten ist, so daß Gewinde zum Befestigen des Zwischenstücks am Gehäuse und am Steuer­rohr nicht erforderlich sind. Das Zwischenstück läßt sich leicht montieren und braucht lediglich in das Gehäuse einge­schoben zu werden. Die Elastizität des Zwischenstücks reicht aus und gewährleistet, daß sich der Kopf des Steuer­rohrs dem Schlagkolben anpaßt; ein genaues axiales Ausrich­ten des Steuerrohrs ist damit nicht mehr nötig.This object is achieved in that the elastic intermediate piece on the head tube and / or in the housing is held axially by radial projections, so that threads for attaching the intermediate piece to the housing and head tube are not required. The adapter is easy to install and only needs to be inserted into the housing. The elasticity of the intermediate piece is sufficient and ensures that the head of the head tube adapts to the percussion piston; an exact axial alignment of the head tube is no longer necessary.

Zur Vereinfachung des Ein- und Ausbauens kann im Gehäuse ein vorderer, radial umlaufender Vorsprung angeordnet sein, an den das vordere Ende des Zwischenstücks anliegt. Das hintere Ende des Zwischenstücks kann entweder durch eine Anschlagkante des Gehäuses festgelegt sein, die durch Umbör­deln des Gehäuseendes entsteht, oder aber eine Nut ist hinten im Gehäuse angeordnet, in die ein Sicherungsring eingreift. Zwischen dem Zwischenstück und dem Sicherungs­ring kann eine Druckplatte angeordnet sein.To simplify installation and removal, a front, radially circumferential projection can be arranged in the housing, against which the front end of the intermediate piece lies. The rear end of the intermediate piece can either be fixed by a stop edge of the housing, which is created by flanging the housing end, or a groove is arranged in the rear of the housing, into which a locking ring engages. A pressure plate can be arranged between the intermediate piece and the securing ring.

Bei einem vorteilhaft mehrteiligen Sicherungsring empfiehlt es sich, die Druckplatte mit einer Sicherungskante zu ver­sehen. Insbesondere beim Einbau eines mehrteiligen, d.h. aus zumindest zwei Ringsegmenten bestehenden Sicherungsrin­ges verhindert die Sicherungskante, daß der Ring nach innen fällt. Der Sicherungsring kann von beliebigem Querschnitt, vorteilhaft jedoch rund sein.In the case of an advantageous multi-part locking ring, it is advisable to provide the pressure plate with a locking edge. Especially when installing a multi-part, i.e. The securing edge, which consists of at least two ring segments, prevents the ring from falling inwards. The locking ring can be of any cross-section, but advantageously round.

Das Zwischenstück kann aus einem Elastomer-Ring mit axialen Luftaustrittsöffnungen bestehen; es läßt sich leicht über den umlaufenden Rastvorsprung auf das Steuerrohr aufschie­ben.The intermediate piece can consist of an elastomer ring with axial air outlet openings; it can easily be pushed over the circumferential locking projection on the head tube.

Da das Steuerrohr mit der Schlauchverbindung nicht mehr den starken Schlägen und Schwingungen des Gehäuses ausgesetzt ist und keine Gefahr des selbsttätigen Lösens mehr besteht, läßt sich der Druckluftschlauch vorteilhaft mittels einer Schraubkupplung am Steuerrohr befestigen. Insgesamt ergibt sich eine längere Lebensdauer des Rammbohrgerätes.Since the control tube with the hose connection is no longer exposed to the strong impacts and vibrations of the housing and there is no longer any risk of automatic loosening, the compressed air hose can advantageously be attached to the control tube by means of a screw coupling. Overall, the ram boring machine has a longer service life.

Die Erfindung wird nachstehend anhand von in der Zeichnung dargestellten Ausführungsbeispielen des näheren erläutert. In der Zeichnung zeigen:

  • Fig. 1 im Längsschnitt eine erste Ausführung eines erfin­dungsgemäßen Rammbohrgeräts,
  • Fig. 2 im Längsschnitt eine weitere Ausführung eines er­findungsgemäßen Rammbohrgerätes und
  • Fig. 3 im Längsschnitt eine dritte Ausführung des erfin­dungsgemäßen Rammbohrgerätes.
The invention is explained below with reference to exemplary embodiments shown in the drawing. The drawing shows:
  • 1 is a longitudinal section of a first embodiment of a ram boring machine according to the invention,
  • Fig. 2 in longitudinal section a further embodiment of a ram boring machine according to the invention and
  • Fig. 3 in longitudinal section a third embodiment of the ram boring machine according to the invention.

Von dem Rammbohrgerät ist jeweils nur das rückwärtige Ende dargestellt. Es besteht aus einem Gehäuse 1, in dem sich ein Schlagkolben 2 hin- und herbewegt. Die Schlagkolbenbe­wegung wird mittels eines Steuerrohres 3 gesteuert, dem Druckluft über einen Druckluftschlauch 6 zugeführt wird. Das Steuerrohr 3 ist mittels eines Zwischenstücks 4 mit dem Gehäuse 1 verbunden. Das Zwischenstück 4 besteht aus einem elastischen Material, z.B. Gummi oder Polyurethan, und ver­hindert, daß die durch den Schlagkolben 2 auf das Gehäuse 1 übertragenen Schläge und Schwingungen ungedämpft auf das Steuerrohr 3 und den Druckluftschlauch 6 gelangen. Die durch eine Bohrung im Steuerrohr 3 zugeführte Druckluft entweicht nach den Arbeitshüben des Schlagkolbens 2 über axiale, konzentrisch zum Steuerrohr 3 verlaufende Luftaus­trittsöffnungen 5 des Zwischenstücks 4 in die Atmosphäre. Der Druckluftschlauch 6 ist mit dem Steuerrohr 3 mittels einer Schraubkupplung 7 verbunden.Only the rear end of the ram boring machine is shown. It consists of a housing 1 in which a percussion piston 2 moves back and forth. The percussion piston movement is controlled by means of a control tube 3, to which compressed air is supplied via a compressed air hose 6. The control tube 3 is connected to the housing 1 by means of an intermediate piece 4. The intermediate piece 4 consists of an elastic material, e.g. Rubber or polyurethane, and prevents the impacts and vibrations transmitted by the percussion piston 2 to the housing 1 from reaching the control tube 3 and the compressed air hose 6 without damping. The compressed air supplied through a bore in the control tube 3 escapes into the atmosphere after the working strokes of the percussion piston 2 via axial air outlet openings 5 of the intermediate piece 4 which are concentric with the control tube 3. The compressed air hose 6 is connected to the control tube 3 by means of a screw coupling 7.

Das Zwischenstück 4 ist auf dem Steuerrohr 3 durch einen vorderen, radialen, umlaufenden Vorsprung 10 und einen hin­teren, radialen, umlaufenden Vorsprung 11 in axialer Rich­tung festgelegt. Auf ähnliche Weise wird das Zwischenstück 4 im rückwärtigen Ende des Gehäuses 1 festgelegt. Das Gehäuse 1 weist nämlich analog einen vorderen, radialen, umlaufenden Vorsprung 12 sowie einen hinteren, radialen, umlaufenden Vorsprung 13 auf.The intermediate piece 4 is fixed on the head tube 3 by a front, radial, circumferential projection 10 and a rear, radial, circumferential projection 11 in the axial direction. Similarly, the intermediate piece 4 is fixed in the rear end of the housing 1. Namely, the housing 1 has a front, radial, circumferential projection 12 and a rear, radial, circumferential projection 13.

Ein ausreichend elastisches, mit dem Gehäuse 1 und dem Steuerrohr 3 durch Einsetzen in die Rastvorsprünge verbun­denes Zwischenstück 4 erlaubt es, das Zwischenstück 4 über das hintere Ende des Steuerrohrs 3 zu schieben, bis es zwischen den Vorsprüngen 10, 11 festgehalten wird. Auf die gleiche Weise läßt sich dann das steuerrohr 3 mit dem Zwischenstück 4 vom rückwärtigen Ende her in das Gehäuse 1 einschieben, was durch eine Anschrägung des hinteren Vor­sprungs 13 erleichtert wird.A sufficiently elastic intermediate piece 4, which is connected to the housing 1 and the head tube 3 by insertion into the locking projections, allows the intermediate piece 4 to be pushed over the rear end of the head tube 3 until it is held between the projections 10, 11. In the same way, the head tube 3 with the intermediate piece 4 can then be pushed into the housing 1 from the rear end, which is facilitated by a beveling of the rear projection 13.

Bei der in Fig. 2 dargestellten Ausführung weist das Zwi­schenstück 4 eine innere und eine äußere, beispielsweise durch Vulkanisieren befestigte Metallhülse 8, 9 auf. Diese Metallhülsen 8, 9 unterstützen den sicheren axialen Sitz des Zwischenstücks 4 gegenüber dem Gehäuse 1 und dem Steuer­rohr 3. Um das Zwischenstück 4 leicht ein- und ausbauen zu können, befindet sich ein elastischer, nach dem Einschieben des Zwischenstücks 4 eingesetzter Sicherungsring 14 in ei­ner Nut 15 des Gehäuses 1. Dieser Sicherungsring 14 läßt sich zum Demontieren des Steuerrohrs 3 mit dem Zwischen­stück 4 wieder herausnehmen.In the embodiment shown in FIG. 2, the intermediate piece 4 has an inner and an outer metal sleeve 8, 9, for example fastened by vulcanization. These metal sleeves 8, 9 support the secure axial fit of the intermediate piece 4 relative to the housing 1 and the head tube 3. In order to be able to easily install and remove the intermediate piece 4, there is an elastic securing ring 14 inserted after the insertion of the intermediate piece 4 Groove 15 of the housing 1. This retaining ring 14 can be removed again with the intermediate piece 4 for dismantling the head tube 3.

Im Ausführungsbeispiel gemäß Fig. 3 weist der Sicherungs­ring 16 einen runden Querschnitt auf, und zwischen dem Si­cherungsring 16 und dem Zwischenstück 4 ist eine Druckplat­te 17 angeordnet, die ein flächiges Anliegen am Zwischen­stück 4 gewährleistet. Die Druckplatte 17 ist mit einer Sicherungskante versehen, die verhindert, daß der gegebenen­falls mehrteilige Sicherungsring 16 nach seiner Montage radial, d.h. nach innen zusammenfällt.In the exemplary embodiment according to FIG. 3, the locking ring 16 has a round cross section, and a pressure plate 17 is arranged between the locking ring 16 and the intermediate piece 4, which ensures a flat contact with the intermediate piece 4. The pressure plate 17 is provided with a securing edge, which prevents the possibly multi-part locking ring 16 from being mounted radially, i.e. collapses inside.

Claims (9)

1. Rammbohrgerät mit einem in einem Gehäuse axial beweg­lichen, in seiner Bewegung durch ein mit einem Druck­luftschlauch verbundenes, in einem im Gehäuse angeord­neten elastischen Zwischenstück gelagertes Steuerrohr gesteuerten Schlagkolben, dadurch gekennzeichnet, daß das Zwischenstück (4) am Steuerrohr (3) und/oder im Gehäuse (1) durch radiale Vorsprünge (10, 11; 12, 13; 14, 16) gehalten ist.1. ram boring machine with an axially movable, in its movement by a compressed air hose connected in a housing arranged in the elastic intermediate control tube mounted control tube, characterized in that the intermediate piece (4) on the control tube (3) and / or is held in the housing (1) by radial projections (10, 11; 12, 13; 14, 16). 2. Rammbohrgerät nach Anspruch 1 dadurch gekennzeichnet, daß das Zwischenstück (4) durch einen vorderen, radia­len, umlaufenden Gehäusevorsprung (12) und durch einen hinteren, in eine Nut (15) im Gehäuse (1) eingreifen­den Sicherungsring (14, 16) gehalten ist.2. A ram boring machine according to claim 1, characterized in that the intermediate piece (4) is held by a front, radial, circumferential housing projection (12) and by a rear locking ring (14, 16) engaging in a groove (15) in the housing (1) is. 3. Rammbohrgerät nach Anspruch 2, dadurch gekennzeichnet, daß der Sicherungsring (14, 16) aus elastischem Mate­rial besteht.3. A ram boring machine according to claim 2, characterized in that the locking ring (14, 16) consists of elastic material. 4. Rammbohrgerät nach Anspruch 2 oder 3, gekennzeichnet durch eine Druckplatte (17) zwischen dem Zwischenstück (4) und dem Sicherungsring (16).4. A ram boring machine according to claim 2 or 3, characterized by a pressure plate (17) between the intermediate piece (4) and the locking ring (16). 5. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 4, gekennzeichnet durch einen mehrteiligen Siche­rungsring (14, 16).5. ram boring machine according to one or more of claims 1 to 4, characterized by a multi-part locking ring (14, 16). 6. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Druckplatte (17) mit einer Sicherungskante (18) versehen ist.6. A ram boring machine according to one or more of claims 1 to 5, characterized in that the pressure plate (17) is provided with a securing edge (18). 7. Rammbohrgerät nach Anspruch 1, dadurch gekennzeichnet, daß eine Anschlagkante des Gehäuses (1) einen hinte­ren, das Zwischenstück (4) hintergreifenden Vorsprung (13) bildet.7. ram boring machine according to claim 1, characterized in that a stop edge of the housing (1) forms a rear, the intermediate piece (4) engaging behind projection (13). 8. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Zwischenstück (4) aus einem Elastomer-Ring mit axialen Luftaustritts­öffnungen (5) besteht.8. A ram boring machine according to one or more of claims 1 to 7, characterized in that the intermediate piece (4) consists of an elastomer ring with axial air outlet openings (5). 9. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Druckluft­schlauch (6) mittels einer Schraubkupplung (7) am Steu­errohr (3) befestigt ist.9. A ram boring machine according to one or more of claims 1 to 8, characterized in that the compressed air hose (6) is fastened to the head tube (3) by means of a screw coupling (7).
EP89111905A 1988-10-05 1989-06-30 Boring ram Expired - Lifetime EP0362481B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3833882 1988-10-05
DE3833882A DE3833882C2 (en) 1988-10-05 1988-10-05 Ram drilling machine

Publications (3)

Publication Number Publication Date
EP0362481A2 true EP0362481A2 (en) 1990-04-11
EP0362481A3 EP0362481A3 (en) 1991-01-30
EP0362481B1 EP0362481B1 (en) 1994-03-16

Family

ID=6364444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111905A Expired - Lifetime EP0362481B1 (en) 1988-10-05 1989-06-30 Boring ram

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US (1) US5074364A (en)
EP (1) EP0362481B1 (en)
JP (1) JP2672369B2 (en)
DE (1) DE3833882C2 (en)

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EP0578942A1 (en) * 1992-06-30 1994-01-19 Tracto-Technik Paul Schmidt Spezialmaschinen Kg Boring ram

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US5249634A (en) * 1990-12-10 1993-10-05 Industrial Engineering, Inc. Impact borer for embedding lines, anchoring cables, and sinking wells
DE4231400C1 (en) * 1992-09-19 1994-01-05 Tracto Technik Ram drilling machine
GB2313643A (en) * 1996-05-31 1997-12-03 Inst Gornogo Dela Sibirskogo O Apparatus for impact action
DE19650014C2 (en) * 1996-12-03 2002-04-11 Tracto Technik Ram boring machine
CA2194079C (en) * 1996-12-19 2005-11-29 Murray P. Craigmile Methods and apparatus for directionally drilling a bore and placing pipe
AU753171B2 (en) * 1998-07-08 2002-10-10 Tracto-Technik Paul Schmidt Spezialmaschinen Positive connection between a pipe and a ring inserted into the pipe
SE528471C2 (en) * 2004-07-05 2006-11-21 Atlas Copco Constr Tools Ab Vibration dampening striking tool with compressed air supply means

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US3756328A (en) * 1970-01-19 1973-09-04 B Sudnishnikov Pneumatically operated impact-action self-propelled mechanism
US3756328B1 (en) * 1970-01-19 1991-01-29 Pneumatically operated impact-action self-propelled mechanism
US3763939A (en) * 1970-07-08 1973-10-09 B Sudnishnikov Reversible impact device for driving holes in earth
US3708023A (en) * 1970-12-30 1973-01-02 Inst Gornogo Dela Sibirskogo O Self-propelled air-punching mechanism
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578942A1 (en) * 1992-06-30 1994-01-19 Tracto-Technik Paul Schmidt Spezialmaschinen Kg Boring ram

Also Published As

Publication number Publication date
US5074364A (en) 1991-12-24
JP2672369B2 (en) 1997-11-05
JPH02108786A (en) 1990-04-20
EP0362481B1 (en) 1994-03-16
DE3833882A1 (en) 1990-04-12
EP0362481A3 (en) 1991-01-30
DE3833882C2 (en) 1996-07-04

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