EP0425802B1 - Drilling device with percussive and rotative tool - Google Patents

Drilling device with percussive and rotative tool Download PDF

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Publication number
EP0425802B1
EP0425802B1 EP90117700A EP90117700A EP0425802B1 EP 0425802 B1 EP0425802 B1 EP 0425802B1 EP 90117700 A EP90117700 A EP 90117700A EP 90117700 A EP90117700 A EP 90117700A EP 0425802 B1 EP0425802 B1 EP 0425802B1
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EP
European Patent Office
Prior art keywords
drilling
impact
drilling device
shank
ram
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP90117700A
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German (de)
French (fr)
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EP0425802A1 (en
Inventor
Manfred Haage
Werner Heinzelmann
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Fischerwerke Artur Fischer GmbH and Co KG
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Fischerwerke Artur Fischer GmbH and Co KG
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Application filed by Fischerwerke Artur Fischer GmbH and Co KG filed Critical Fischerwerke Artur Fischer GmbH and Co KG
Priority to AT90117700T priority Critical patent/ATE93173T1/en
Publication of EP0425802A1 publication Critical patent/EP0425802A1/en
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Publication of EP0425802B1 publication Critical patent/EP0425802B1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/02—Rod or cable suspensions
    • E21B19/06—Elevators, i.e. rod- or tube-gripping devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/005—Attachments or adapters placed between tool and hammer
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits

Definitions

  • the invention relates to a drilling device with an impact turning tool according to the preamble of the main claim.
  • Drilling devices are known in which, in particular for creating boreholes in gas concrete, a punch is used instead of a drill. This is hammered into the gas concrete and thereby creates an exactly defined borehole, while the gas concrete is compacted in the area of the borehole.
  • a disadvantage of these known devices is that the striking pin is jammed in the borehole and can therefore only be removed from it with difficulty or not at all.
  • expansion anchors with a relatively small expansion dimension cannot be used in gas concrete, since the borehole is widened by slight deviations from the drilling axis when the borehole is being created, as a result of which the holding value of the anchor to be used is impaired.
  • the invention has for its object to provide a drilling device for creating geometrically precisely defined boreholes in gas concrete, which also allows easy removal of the drilling device from the borehole after the completion of the drilling process.
  • a drilling device of the type mentioned by the features specified in the characterizing part of the main claim The consisting of a drilling punch, a driving bush connected to it and a tappet inserted into it makes it possible for the tappet with its drill receptacle of an impact drill to be released from the driving bush when the impact drill is switched on and for the punch to be generated by the impact energy generated by the impact drill drives into the gas concrete.
  • the friction between the drilling punch and the gas concrete prevents the drilling punch from rotating, so that only the plunger which is supported with play in the driving bush rotates during the drilling process.
  • the gas concrete When the required drill hole depth is reached, the gas concrete is compacted and displaced in the area of the drill punch inserted into it. A jamming of the drilling punch in the compressed gas concrete when removing the drilling punch is prevented by the fact that when the drilling punch is returned from the borehole, the plunger gets stuck in the conically shaped driving bush and thus the rotary movement of the push rod on the driving bush Drill punch mandrel itself is transmitted. The drilling punch can therefore be removed from the borehole without the need for additional force.
  • a particularly advantageous development of the invention provides that the drilling punch has a notch on its end facing away from the ram. Because of that formed drill tip of the drilling device according to the invention an additional rotation of the drill striker is achieved when driven into the gas concrete.
  • the flank of the cylindrical section provided on the drilling punch which has a widened diameter, corresponds to the diameter of the dowel diameter to be later inserted into the borehole in this area. This enables a borehole that is precisely defined in this area and matched to the dowel to be used.
  • the conical shape of the front area of the drilling punch which has a diameter of approx.0.9 x nominal plug diameter on the face of the drilling punch, facilitates the later removal of the drilling punch from the drill hole, as this reduces friction with the Borehole wall is achieved.
  • the drill striker has a reduced diameter between the cylindrical section and its end facing the plunger in order to prevent the drill striker from jamming in the region of the attachment during the push-through assembly.
  • the drilling device shown in FIG. 1 shows the drilling punch 1, which is connected to a driving bush 2.
  • the plunger 3 which is supported with play, lies, on the end face of which a drill receptacle 3a is arranged.
  • a cylindrical section 1 a is provided in the central area of the drilling punch 1.
  • the drilling punch 1 On its end face facing the driving bush 2, the drilling punch 1 has a circumferential shoulder 1b on.
  • the drill striker 1 tapers conically between its cylindrical section 1a and its end face opposite the plunger 3. In the area between its shoulder 1b and the cylindrical section 1a, the drilling punch 1 has an area 1d with a reduced diameter.
  • the drill punch 1 is inserted through an attachment 4 into a masonry consisting of gas concrete 5.
  • the drilling device according to the invention with the drill receptacle 3a of the plunger 3 is inserted into a percussion drill, which cannot be seen from the drawing.
  • the plunger 3 releases from the driving bush 2 and drives the drilling impact mandrel 1 through an attachment 4 into the gas concrete 5 by the impact energy.
  • the friction between the drilling punch 1 and the gas concrete 5 prevents the drilling punch 1 from rotating in the borehole. Only the plunger 3 rotates during the drilling process.
  • the drilling hammer 1 compacted and displaced the gas concrete 5.
  • the impact drill is pulled back.
  • the plunger 3 is fixed in the conically shaped inner bore 2a of the driving bush 2.
  • the driver bush 2 thus transmits the rotary movement of the plunger 3 to the drilling punch 1, since this is connected to the driver bush 2 via paragraph 1b.
  • the drill punch 1 is removed from the borehole.
  • a jamming of the drilling punch 1 during the return in the attachment 4 is prevented due to the reduced diameter 1d and in the gas concrete 5 by the conical design of the drilling punch 1.
  • FIG. 1 A further embodiment of the drilling punch 1 can be seen from FIG.
  • a notch 1e is provided on the end face 1c, by means of which an additional rotation lock is provided on the end face 1c during the drilling process.

Abstract

Drilling devices in the form of percussive piercers or rotative piercers are known, by means of which boreholes, in particular in gas concrete, are produced. <??>To prevent the percussive drilling piercer from getting jammed in the borehole during its return stroke and nevertheless to obtain maximum holding values in gas concrete, a drilling device with a percussive drilling piercer (1), a driving bush (2) connected thereto, and a ram (3) is proposed, on which a drill receptacle (3a) is arranged. <IMAGE>

Description

Die Erfindung betrifft eine Bohrvorrichtung mit einem Schlagdrehwerkzeug gemäß der Gattung des Hauptanspruchs.The invention relates to a drilling device with an impact turning tool according to the preamble of the main claim.

Es sind Bohrvorrichtungen bekannt, bei denen, insbesondere zur Erstellung von Bohrlöchern in Gasbeton, anstelle eines Bohrers ein Schlagdorn verwendet wird. Dieser wird in den Gasbeton eingeschlagen und erzeugt dadurch ein exakt definiertes Bohrloch, wobei gleichzeitig der Gasbeton im Bereich des Bohrlochs verdichtet wird. Als nachteilig erweist sich bei diesen bekannten Vorrichtungen, daß sich der Schlagdorn im Bohrloch verklemmt und somit aus diesem nur schwer oder überhaupt nicht mehr entfernt werden kann.Drilling devices are known in which, in particular for creating boreholes in gas concrete, a punch is used instead of a drill. This is hammered into the gas concrete and thereby creates an exactly defined borehole, while the gas concrete is compacted in the area of the borehole. A disadvantage of these known devices is that the striking pin is jammed in the borehole and can therefore only be removed from it with difficulty or not at all.

Ebenfalls ist es bekannt, anstelle eines Bohrers einen Drehdorn zu verwenden. Bei der Erstellung des Bohrlochs in Gasbeton wird der Gasbeton im Bereich des Bohrlochs verdrängt und verdichtet. Als nachteilig hat sich bei der Verwendung von Drehdornen erwiesen, daß diese das Bohrloch aufweiten. Insbesondere führen die während des Bohrvorganges ausgeführten Drehbewegungen in trockenem Gasbeton zu Ausreibungen des Bohrlochs. Bei Erstellung von entsprechenden Bohrlöchern in naßem Gasbeton kann dagegen oftmals ein Dübel in das Bohrloch nicht mehr eingesetzt werden, da dieses im Verhältnis zu dessen Durchmesser zu klein ist. Aufgrund der geringen Festigkeit von Gasbeton müssen jedoch für zugelassene Dübel relativ große Durchmesser zur Einleitung der Last verwendet werden. Diese sind jedoch für die Durchsteckmontage nicht geeignet. Andererseits können Spreizdübel mit relativ geringem Aufspreizmaß in Gasbeton nicht verwendet werden, da bei der Bohrlocherstellung das Bohrloch durch geringe Abweichungen von der Bohrachse aufgeweitet wird, wodurch der Haltewert des einzusetzenden Dübels beeinträchtigt wird.It is also known to use a turning mandrel instead of a drill. When the borehole is made in gas concrete, the gas concrete is displaced and compacted in the area of the borehole. A disadvantage of using mandrels has been that they expand the borehole. In particular, the rotary movements performed during the drilling process in dry gas concrete cause the borehole to be rubbed out. On the other hand, when appropriate drill holes are made in wet gas concrete, a dowel can often no longer be inserted into the drill hole, since this is too small in relation to its diameter. Due to the low strength of gas concrete, however, relatively large diameters must be used for the introduction of the load for approved dowels. However, these are not suitable for push-through installation. On the other hand, expansion anchors with a relatively small expansion dimension cannot be used in gas concrete, since the borehole is widened by slight deviations from the drilling axis when the borehole is being created, as a result of which the holding value of the anchor to be used is impaired.

Der Erfindung liegt die Aufgabe zugrunde, eine Bohrvorrichtung zur Erstellung von geometrisch exakt definierten Bohrlöchern in Gasbeton zu schaffen, die ferner eine problemlose Entfernung der Bohrvorrichtung aus dem Bohrloch nach der Beendigung des Bohrvorganges ermöglicht.The invention has for its object to provide a drilling device for creating geometrically precisely defined boreholes in gas concrete, which also allows easy removal of the drilling device from the borehole after the completion of the drilling process.

Die Lösung dieser Aufgabe wird bei einer Bohrvorrichtung der eingangs genannten Gattung durch die im kennzeichnenden Teil des Hauptanspruchs angegebenen Merkmale erhalten. Das aus einem Bohr-Schlagdorn, einer mit diesem verbundenen Mitnehmerbuchse sowie einem dieser einliegenden Stössel bestehende Schlagdrehwerkzeug ermöglicht es, daß der mit seiner Bohreraufnahme einer Schlagbohrmaschine einliegende Stössel bei Einschalten der Schlagbohrmaschine sich aus der Mitnehmerbuchse löst und durch die von der Schlagbohrmaschine erzeugte Schlagenergie den Schlagdorn in den Gasbeton eintreibt. Durch die Reibung zwischen dem Bohr-Schlagdorn und dem Gasbeton wird ein Mitdrehen des Bohr-Schlagdorns verhindert, so daß sich während des Bohrvorganges lediglich der mit Spiel in der Mitnehmerbuchse gelagerte Stössel dreht. Durch das Vortreiben des Bohr-Schlagdorns während des Bohr-vorganges, ohne daß an diesem selbst eine Drehbewegung entsteht, wird in Gasbeton eine Abbildung des Dorns als exakt definiertes Bohrloch ausgeformt. Geringe Achsabweichungen beim Bohrvorgang werden durch das zwischen Stössel und Mitnehmerbuchse bestehende Spiel aufgefangen. Größere Abweichungen werden nicht durch Geometrieänderungen des Bohrloches selbst abgefangen, sondern durch den Bohr-Schlagdorn über die auftretende Querkraft in den Gasbeton abgeleitet, ohne daß dadurch eine Bohrlochänderung bedingt wäre.The solution to this problem is obtained in a drilling device of the type mentioned by the features specified in the characterizing part of the main claim. The consisting of a drilling punch, a driving bush connected to it and a tappet inserted into it makes it possible for the tappet with its drill receptacle of an impact drill to be released from the driving bush when the impact drill is switched on and for the punch to be generated by the impact energy generated by the impact drill drives into the gas concrete. The friction between the drilling punch and the gas concrete prevents the drilling punch from rotating, so that only the plunger which is supported with play in the driving bush rotates during the drilling process. By advancing the drill punch during the drilling process without causing a rotary movement itself, an image of the mandrel is formed as an exactly defined drill hole in gas concrete. Minor axis deviations during the drilling process are compensated for by the play existing between the ram and the driving bush. Larger deviations are not intercepted by changes in the geometry of the borehole itself, but are derived by the drill punch via the transverse force that occurs in the gas concrete, without this necessitating a change in the borehole.

Bei Erreichen der erforderlichen Bohrlochtiefe ist der Gasbeton im Bereich des in ihn eingeführten Bohr-Schlagdorns verdichtet und verdrängt. Eine Verklemmung des Bohr-Schlagdorns im verdichteten Gasbeton bei der Entfernung des Bohr-Schlagdorns wird dadurch verhindert, daß bei Rückführung des Bohr-Schlagdorns aus dem Bohrloch der Stössel sich in der konisch ausgebildeten Mitnehmerbuchse festsetzt und somit über die Mitnehmerbuchse die Drehbewegung des Stössels auf den Bohr-Schlagdorn selbst übertragen wird. Der Bohr-Schlagdorn läßt sich daher ohne weitere Kraftaufwendung aus dem Bohrloch entfernen.When the required drill hole depth is reached, the gas concrete is compacted and displaced in the area of the drill punch inserted into it. A jamming of the drilling punch in the compressed gas concrete when removing the drilling punch is prevented by the fact that when the drilling punch is returned from the borehole, the plunger gets stuck in the conically shaped driving bush and thus the rotary movement of the push rod on the driving bush Drill punch mandrel itself is transmitted. The drilling punch can therefore be removed from the borehole without the need for additional force.

Eine besonders vorteilhafte Weiterbildung der Erfindung sieht vor, daß der Bohr-Schlagdorn an seiner dem Stössel abgewandten Stirnseite eine Kerbe aufweist. Durch die so ausgeformte Bohrerspitze der erfindungsgemäßen Bohrvorrichtung wird eine zusätzliche Drehsicherung des Bohrer-Schlagdorns bei Eintreiben in den Gasbeton erzielt.A particularly advantageous development of the invention provides that the drilling punch has a notch on its end facing away from the ram. Because of that formed drill tip of the drilling device according to the invention an additional rotation of the drill striker is achieved when driven into the gas concrete.

Der am Bohr-Schlagdorn vorgesehene, einen verbreiterten Durchmesser aufweisende, zylindrische Abschnitt entspricht an seiner Flanke dem Durchmesser des später in das Bohrloch einzusetzenden Dübeldurchmessers in diesem Bereich. Hierdurch wird ein in diesem Bereich exakt definiertes, auf den einzusetzenden Dübel abgestimmtes Bohrloch ermöglicht.The flank of the cylindrical section provided on the drilling punch, which has a widened diameter, corresponds to the diameter of the dowel diameter to be later inserted into the borehole in this area. This enables a borehole that is precisely defined in this area and matched to the dowel to be used.

Die konische Ausformung des vorderen Bereichs des Bohr-Schlagdorns, die an der Stirnseite des Bohr-Schlagdorns einen Durchmesser von ca. 0,9 x Dübelnenndurchmesser aufweist, erleichtert die spätere Entfernung des Bohr-Schlagdorns aus dem Bohrloch, da hierdurch eine verminderte Reibung mit der Bohrlochwandung erzielt wird.The conical shape of the front area of the drilling punch, which has a diameter of approx.0.9 x nominal plug diameter on the face of the drilling punch, facilitates the later removal of the drilling punch from the drill hole, as this reduces friction with the Borehole wall is achieved.

Der Bohr-Schlagdorn weist zwischen dem zylindrischen Abschnitt und seiner dem Stössel zugewandten Stirnseite einen reduzierten Durchmesser auf, um bei der Durchsteckmontage ein Verklemmen des Bohrschlagdorns im Bereich des Anbauteils zu verhindern.The drill striker has a reduced diameter between the cylindrical section and its end facing the plunger in order to prevent the drill striker from jamming in the region of the attachment during the push-through assembly.

Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert.The invention is explained below with reference to the drawing.

Es zeigen:

Figur 1
die durch ein Anbauteil in ein aus Gasbeton bestehendes Mauerwerk eingeschlagene Bohrvorrichtung und
Figur 2
eine weitere Ausführung des aus Figur 1 ersichtlichen Bohr-Schlagdorns.
Show it:
Figure 1
the drilling device driven by an attachment into a masonry made of gas concrete and
Figure 2
a further embodiment of the drilling punch shown in Figure 1.

Die in Figur 1 dargestellte Bohrvorrichtung zeigt den Bohr-Schlagdorn 1, der mit einer Mitnehmerbuchse 2 verbunden ist. In der konisch ausgebildeten Innenbohrung 2a der Mitnehmerbuchse 2 liegt der mit Spiel gelagerte Stössel 3 ein, an dessen Stirnseite eine Bohreraufnahme 3a angeordnet ist. Im mittigen Bereich des Bohr-Schlagdorns 1 ist ein zylindrischer Abschnitt 1a vorgesehen. An seiner der Mitnehmerbuchse 2 zuweisenden Stirnseite weist der Bohr-Schlagdorn 1 einen seinen Umfang umlaufenden Absatz 1b auf. Der Bohr-Schlagdorn 1 läuft zwischen seinem zylindrischen Abschnitt 1a und seiner dem Stössel 3 gegenüberliegenden Stirnseite konisch verjüngt zu. Im Bereich zwischen seinem Absatz 1b und dem zylindrischen Abschnitt 1a weist der Bohr-Schlagdorn 1 einen in seinem Durchmesser reduzierten Bereich 1d auf.The drilling device shown in FIG. 1 shows the drilling punch 1, which is connected to a driving bush 2. In the conically shaped inner bore 2a of the driving bush 2, the plunger 3, which is supported with play, lies, on the end face of which a drill receptacle 3a is arranged. A cylindrical section 1 a is provided in the central area of the drilling punch 1. On its end face facing the driving bush 2, the drilling punch 1 has a circumferential shoulder 1b on. The drill striker 1 tapers conically between its cylindrical section 1a and its end face opposite the plunger 3. In the area between its shoulder 1b and the cylindrical section 1a, the drilling punch 1 has an area 1d with a reduced diameter.

Der Bohr-Schlagdorn 1 ist durch ein Anbauteil 4 in ein aus Gasbeton 5 bestehendes Mauerwerk eingesetzt. Bei einem für eine Durchsteckmontage zu erstellenden Bohrloch wird die erfindungsgemäße Bohrvorrichtung mit der Bohreraufnahme 3a des Stössels 3 in einen, aus der Zeichnung nicht ersichtlichen, Schlagbohrer eingesetzt. Beim Einschalten des Schlagbohrers löst sich der Stössel 3 aus der Mitnehmerbuchse 2 und treibt durch die Schlagenergie den Bohr-Schlagdorn 1 durch ein Anbauteil 4 in den Gasbeton 5 ein. Durch die Reibung zwischen dem Bohr-Schlagdorn 1 und dem Gasbeton 5 wird ein Mitdrehen des Bohr-Schlagdorns 1 im Bohrloch verhindert. Lediglich der Stössel 3 dreht sich während des Bohrvorganges. Bei Erreichen der erforderlichen Bohrlochtiefe hat der Bohr-Schlagdorn 1 den Gasbeton 5 verdichtet und verdrängt. Zum Entfernen des Bohr-Schlagdorns 1 wird die Schlagbohrmaschine zurückgezogen. Hierdurch setzt sich, infolge der auf die Zeichnung bezogenen Aufwärtsbewegung, der Stössel 3 in der konisch ausgebildeten Innenbohrung 2a der Mitnehmerbuchse 2 fest. Die Mitnehmerbuchse 2 überträgt somit die Drehbewegung des Stössels 3 auf den Bohr-Schlagdorn 1, da dieser über den Absatz 1b mit der Mitnehmerbuchse 2 verbunden ist. Auf diese Weise wird der Bohr-Schlagdorn 1 aus dem Bohrloch entfernt. Ein Verklemmen des Bohr-Schlagdorns 1 während der Rückführung im Anbauteil 4 wird aufgrund des im Durchmesser reduzierten Bereichs 1d und im Gasbeton 5 durch die konische Ausbildung des Bohr-Schlagdorns 1 verhindert.The drill punch 1 is inserted through an attachment 4 into a masonry consisting of gas concrete 5. In the case of a borehole to be created for a push-through assembly, the drilling device according to the invention with the drill receptacle 3a of the plunger 3 is inserted into a percussion drill, which cannot be seen from the drawing. When the impact drill is switched on, the plunger 3 releases from the driving bush 2 and drives the drilling impact mandrel 1 through an attachment 4 into the gas concrete 5 by the impact energy. The friction between the drilling punch 1 and the gas concrete 5 prevents the drilling punch 1 from rotating in the borehole. Only the plunger 3 rotates during the drilling process. When the required borehole depth was reached, the drilling hammer 1 compacted and displaced the gas concrete 5. To remove the drilling punch 1, the impact drill is pulled back. As a result, due to the upward movement referred to the drawing, the plunger 3 is fixed in the conically shaped inner bore 2a of the driving bush 2. The driver bush 2 thus transmits the rotary movement of the plunger 3 to the drilling punch 1, since this is connected to the driver bush 2 via paragraph 1b. In this way, the drill punch 1 is removed from the borehole. A jamming of the drilling punch 1 during the return in the attachment 4 is prevented due to the reduced diameter 1d and in the gas concrete 5 by the conical design of the drilling punch 1.

Aus Figur 2 ist eine weitere Ausführungsform des Bohr-Schlagdorns 1 ersichtlich. Bei dieser ist an der Stirnseite 1c eine Einkerbung 1e vorgesehen, durch die während des Bohrvorgangs eine zusätzliche Drehsicherung an der Stirnseite 1c gegeben ist.A further embodiment of the drilling punch 1 can be seen from FIG. In this case, a notch 1e is provided on the end face 1c, by means of which an additional rotation lock is provided on the end face 1c during the drilling process.

Claims (8)

  1. A drilling device with an impact-rotation tool for producing drill holes in masonry consisting of aerated concrete, the impact-rotation tool being arranged to be clamped in an impact drilling machine, characterized in that the impact-rotation tool consists of an impact-drilling shank (1), a carrier bush (2) connected to this and, engaging in the carrier bush (2), also a ram (3) on which the drill bit-like locating means (3a) is arranged.
  2. A drilling device according to claim 1, characterized in that the ram (3) widens conically in its region facing the impact-drilling shank (1).
  3. A drilling device according to claim 1, characterized in that the carrier bush (2) has an internal bore (2a) that widens conically in the direction of the impact-drilling shank (1).
  4. A drilling device according to claim 3, characterized in that on the impact-drilling shank (1) there is formed in the region thereof facing the carrier bush (2) and extending around the circumference of the impact-drilling shank a shoulder (1b), which is connected to the end face of the carrier bush (2) facing towards the shoulder.
  5. A drilling device according to one of the preceding claims, characterized in that the impact-drilling shank (1) has a circular face at its end face (1c) remote from the ram (3).
  6. A drilling device according to claim 1, characterized in that the impact-drilling shank (1) has a notch (1e) at its end face remote from the ram (3).
  7. A drilling device according to one of the preceding claims, characterized in that in the middle region of the impact-drilling shank (1) a cylindrical portion (1a) of widened diameter is provided.
  8. A drilling device according to claim 7, characterized in that the impact-drilling shank (1) extends like a cone from its end face (1c) remote from the ram (3) to its central portion (1a), and behind this cylindrical portion (1a) continues with a reduced diameter to its end face facing the ram (3).
EP90117700A 1989-10-28 1990-09-14 Drilling device with percussive and rotative tool Expired - Lifetime EP0425802B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90117700T ATE93173T1 (en) 1989-10-28 1990-09-14 DRILLING JIG WITH AN IMPACT ROTARY TOOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3935985A DE3935985A1 (en) 1989-10-28 1989-10-28 DRILLING DEVICE WITH AN IMPACT TURNING TOOL
DE3935985 1989-10-28

Publications (2)

Publication Number Publication Date
EP0425802A1 EP0425802A1 (en) 1991-05-08
EP0425802B1 true EP0425802B1 (en) 1993-08-18

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US (1) US5076374A (en)
EP (1) EP0425802B1 (en)
JP (1) JPH0716940B2 (en)
AT (1) ATE93173T1 (en)
BR (1) BR9005395A (en)
DE (2) DE3935985A1 (en)
DK (1) DK0425802T3 (en)
ES (1) ES2045705T3 (en)
RU (1) RU2032539C1 (en)

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DE4408159C2 (en) * 1993-04-08 1996-09-26 Horst Kunkel Method of inserting a dowel into aerated concrete
CN109079038A (en) * 2018-09-04 2018-12-25 沈阳飞机工业（集团）有限公司 A kind of template drill bushing punching pin

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GB2146562A (en) * 1983-09-13 1985-04-24 Brian Ronald Tompkins Tool driving device
EP0306539A1 (en) * 1987-03-02 1989-03-15 Spetsializirovanny Trest Po Remontu Promyshlennykh Zdany I Soorzheny Pred. Chernoi Met. Tsentral. Raiona Tsentrmetallurgremont Device for the destruction of monolithic objects

Also Published As

Publication number Publication date
ES2045705T3 (en) 1994-01-16
DK0425802T3 (en) 1993-10-11
ATE93173T1 (en) 1993-09-15
JPH0716940B2 (en) 1995-03-01
US5076374A (en) 1991-12-31
DE59002384D1 (en) 1993-09-23
EP0425802A1 (en) 1991-05-08
BR9005395A (en) 1991-09-17
DE3935985A1 (en) 1991-05-02
JPH03153310A (en) 1991-07-01
RU2032539C1 (en) 1995-04-10

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