EP3693532A1 - Earth boring device, method of manufacturing a device for boring in earth, method of servicing a device for boring in earth and use of a device for boring in earth - Google Patents

Earth boring device, method of manufacturing a device for boring in earth, method of servicing a device for boring in earth and use of a device for boring in earth Download PDF

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Publication number
EP3693532A1
EP3693532A1 EP20156549.6A EP20156549A EP3693532A1 EP 3693532 A1 EP3693532 A1 EP 3693532A1 EP 20156549 A EP20156549 A EP 20156549A EP 3693532 A1 EP3693532 A1 EP 3693532A1
Authority
EP
European Patent Office
Prior art keywords
housing
drill head
bearing
head tip
drilling
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
EP20156549.6A
Other languages
German (de)
French (fr)
Other versions
EP3693532B1 (en
Inventor
Franz-Josef Puttmann
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.)
Tracto Technik GmbH and Co KG
Original Assignee
Tracto Technik GmbH and Co KG
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 Tracto Technik GmbH and Co KG filed Critical Tracto Technik GmbH and Co KG
Publication of EP3693532A1 publication Critical patent/EP3693532A1/en
Application granted granted Critical
Publication of EP3693532B1 publication Critical patent/EP3693532B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B4/003—Bearing, sealing, lubricating details
    • 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
    • E21B1/00—Percussion drilling
    • 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
    • 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
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices

Definitions

  • the invention relates to a device for drilling in the ground, a method for producing a device for drilling in the ground, a method for servicing a device for drilling in the ground and a use of a device for drilling in the ground.
  • a striking head which has a chisel with a striking point and an anvil for the striking piston.
  • the chisel is arranged in a hole in a base, which also serves as an adapter for screwing into an impact device body.
  • the object of the invention is to provide a device for drilling in the ground, a method for producing a device for drilling in the ground, a method for maintaining a device for To create drilling in the ground and a use of a device for drilling in the ground, in which an improvement in terms of maintenance, service life and / or amortization of the costs that are expended for such a device is possible.
  • the core idea of the invention is to provide a bearing with which the drill head tip is mounted in the housing during the longitudinal movement. In this way, it can be avoided that - unlike in the prior art - the material of the drill head tip comes into direct contact with the material of the housing. Due to the harsh conditions in the field of earth drilling, steel is mostly used for the drill head tip and the housing, so that in the prior art steel rubs against steel and wear on the rod and / or on the drill head tip can occur. A bearing makes it possible for the bearing to wear, while the wear on the housing and / or the drill head tip can be kept low.
  • the invention provides a device for drilling in the ground.
  • the device has a housing and a longitudinally movable drill head tip arranged in the housing.
  • the device also has a bearing for mounting the drill head tip in the housing during the longitudinal movement.
  • soil in the context of the present description includes in particular any type of material, in particular earth, sand, rock, rock and mixed forms thereof, in the existing or to be created, preferably at least partially horizontal, channels or bores, in particular earth channels including earth bores , Rock boreholes or underground lines as well as underground or above-ground pipelines and water channels that can be created or pulled into the ground by using a suitable device for drilling.
  • a “device for drilling in the ground” is understood to mean any device which moves in particular a drill string comprising rods in an existing or to be created channel in the ground in order to create or widen a hole, in particular a horizontal hole (HD), or pipelines or others pulling long bodies into the ground.
  • the device for drilling in the ground can in particular be a high-pressure device.
  • a device for drilling in the ground can thus be a device which drives a drill string and which works in a soil-displacing manner and introduces the drill string into the soil in a translatory and / or rotary manner in the longitudinal axial direction of the drill string.
  • a borehole can be drilled into the ground by applying tension or pressure to the drill string.
  • HD horizontal drilling
  • vertical drilling in the context of the present description includes in particular an at least partially horizontally arranged bore or channel or pipeline.
  • the device for drilling in the ground can be a ram drilling device.
  • ram boring device or "earth rocket”, which is essentially used synonymously with the ram boring device, includes in the sense of the description a self-propelled percussion device which works to displace the soil and can hammer a bore, a line and / or a pipe into the ground.
  • the term ram boring device includes earth displacement devices in which the drill head tip is arranged to be longitudinally movable in a housing.
  • the drill head tip can in particular be a chisel.
  • a ram boring device can be both a one-stroke device and a two-stroke device. A three-stroke device is also possible.
  • a ram boring device can be both a single-cycle device and a device operating with several cycles, in particular a two-cycle device.
  • the percussion piston hits the drill head tip and at the same time hits the housing.
  • the percussion piston first hits the drill head tip, which runs ahead in the first cycle.
  • the housing is acted upon by the percussion piston in a subsequent cycle, in particular in the second cycle. Tip resistance and skin friction are separated in a multi-cycle device, and alternately more easily overcome.
  • a multi-cycle device in particular a two-cycle device, better energy conversion can take place, which in particular facilitates the breaking up of obstacles as a result of the concentration of the impact pulse on the drill head tip.
  • the housing As a result of the displacement of the ground leading in accordance with the stroke of the drill head tip, the housing remains in a quiet position and thereby ensures relatively good running stability.
  • the term "drill head tip” in the sense of the description is an element on the drill head side which has an outwardly directed or exposed end which comes into contact with the ground during drilling.
  • the tip of the drill head forms the front area of the drill string which, for the introduction of the earth bore into the earth, first comes into contact with the earth to be displaced.
  • the outwardly directed end of the drill head tip can have an impact point, which in particular can have a step geometry and preferably has a cutting edge.
  • the drill head tip can have a non-tapered front-side geometry.
  • the drill head tip can in particular be a chisel.
  • the drill head tip can have an end facing a percussion piston, on which the percussion piston can strike (anvil-side end of the drill head tip).
  • the drill head tip can be an attachment axially fixed in relation to the drill head tip, in particular have a step attachment.
  • the drill head tip can alternatively or additionally have an attachment that can be axially displaced with respect to the drill head tip, in particular a stepped attachment.
  • the drill head tip can be prestressed in the housing by means of a spring arranged in particular in an annular space between the drill head tip and the housing, in order to hold the drill head tip in its basic position or to move it back into it.
  • the drill head tip can be an element with which the displacement work of the device for drilling in earth can be carried out on the front side of the drill string.
  • the drill head tip is not necessarily made in one piece.
  • the drill head tip can also be formed from several segments that are arranged one behind the other in the longitudinal direction. In a preferred embodiment, the drill head tip is formed in one piece at least in the area of the housing. If there are attachments on the drill head tip, they can be designed as detachable attachments.
  • the bearing is an additional element in the housing.
  • the bearing is preferably not formed in one piece with the housing. Even if the bearing wears out, the housing and drill head tip can still be used if the bearing is replaced. It was recognized for the first time that an additional component offers an improvement in terms of the task to be solved, although it was assumed that the provision of a bearing increases the complexity and the structure.
  • the bearing is designed separately from the housing and / or separable from it.
  • the bearing preferably has a different material than the material of the housing.
  • the bearing can be manufactured as a simple rotating part or designed as such. Manufacturing by means of turning is easy to handle, precise and inexpensive.
  • the bearing can in particular be in one piece.
  • the bearing can in particular have a closed circumference, in particular a closed inner circumference.
  • the housing in the sense of the description can be designed tubular at least in sections.
  • the housing can have any cross section, which can in particular be round, circular and / or elliptical.
  • the housing preferably has a channel extending longitudinally through the housing in which the drill head tip can be arranged.
  • the longitudinal extension of the housing and the longitudinal extension of the drill head tip can correspond.
  • a percussion piston can also be arranged in the housing, in particular if the device for drilling in the ground is a ram drilling device. It is possible that the housing in which the drill head tip can be arranged can be connected to a further housing in which the percussion piston - in the case of a ram drilling device - is arranged.
  • housing is connected to a further housing, for example by a percussion piston is arranged, which can act on the drill head tip
  • a structuring in particular arranged at the end, can be provided on the housing for the drill head tip for connecting, which is designed to correspond to a structuring on the housing for the percussion piston.
  • the term housing can encompass a solid casing, in particular made of metal, in particular steel, which surrounds the drill head tip at least in sections on the circumferential side.
  • the housing can in particular be a part of a housing of a ram drilling device which can be connected to the housing in which the percussion piston is arranged.
  • the housing can be a so-called front housing, which can be connected to the housing for the percussion piston, for example by means of screwing, gluing, shrinking, or a combination of the aforementioned methods. If the housing is a section of a housing which can be connected to the housing in which the percussion piston is arranged, the housing in the connection area can have a smaller cross section than the housing in which the percussion piston is arranged. The housing in which the drill head tip is arranged can be inserted into the housing in which the percussion piston is arranged.
  • the housing in which the drill head tip is arranged is inserted into the housing in which the percussion piston is arranged, the insertion can result in the drill head tip also - at least at the end or partially - in the housing, in which the percussion piston is arranged, is arranged.
  • the housing has a receiving space in which the bearing for the drill head tip can be arranged.
  • the receiving space has the bearing for the drill head tip.
  • a bearing can be provided at a defined point, which is provided for mounting the drill head tip in the housing during the longitudinal movement.
  • the receiving space can be a space that is easy to produce and can be formed, for example, by means of a recess in the housing.
  • the receiving space can be formed by means of turning, milling, drilling, spark erosion, etc.
  • the receiving space can be a recess in the housing, which can be designed as a groove and is at least partially designed on the inside of the housing on the circumferential side.
  • the receiving space can be designed as an annular recess extending in the radial direction in the inner contour of the housing.
  • the receiving space can in particular have an unstructured or unstructured surface, i.e. substantially smooth surface.
  • the receiving space is accessible on the drill head side.
  • the receiving space can thus be accessible from the front. From the front, in relation to the advance of a device for drilling in the ground, the area which first comes into contact with the ground or which first displaces the ground.
  • the recording room can be accessible from the side that is spaced apart from the side of the housing that is spaced from the percussion piston or the anvil-side end of the drill head tip. In this way, a possibility can be created to access the bearing without dismantling the drill head tip and the housing. If necessary, attachments on the drill head tip have to be dismantled, but it is not necessary to dismantle the housing with the drill head tip or the drill head tip from the housing.
  • the bearing can easily be exchanged.
  • the drill head tip can be moved in the direction of the percussion piston in order to be able to access the bearing.
  • the receiving space can be covered by an attachment arranged on the tip of the drill head.
  • Such an attachment can be fastened to the drill head tip at a predetermined position by means of one or more fastening bolts.
  • An attachment covering the receiving space on the front side can encompass the housing on the front side.
  • a seal can be present between the housing and the attachment which creates a seal against particles and / or fluid in the contact area between the housing and the attachment. In this way it can be ensured, for example, that no dirt or the like can penetrate into the receiving space.
  • the bearing can be held in the housing by means of a corresponding fit.
  • Housing and bearing can have the same contour - once as an inner shape and once as an outer shape. In particular, there is an interference fit or fit.
  • a material bond can be formed between the housing and the bearing, in particular by means of an adhesive.
  • a threaded connection between the bearing and the housing can be dispensed with, which reduces the complexity of the structure and / or the forces that act on the housing from the bearing are reduced. Between the housing and the bearing or the bearing and the drill head tip, the forces that act in the longitudinal axial direction essentially parallel to the longitudinal axis can be kept small or are negligible.
  • the bearing acts neither on the housing nor on the drill head tip in a direction other than the radial direction.
  • the bearing has no contact surface for the drill head tip, the surface normal of which encloses an angle greater than 20 ° with the longitudinal axis of the drill head tip.
  • the function of the bearing can be reduced to a pure bearing function for a longitudinal axial movement of the drill head tip.
  • the bearing is a plain bearing or a roller bearing, a plain bearing in particular in which the parts moving relative to one another (housing and drill head tip) are in direct contact.
  • the sliding bearing can be a sliding bearing with solid friction, a sliding bearing with fluid friction or a sliding bearing with mixed friction.
  • the bearing surrounds the drill head tip at least in sections on the circumferential side, so that longitudinal axial guidance is provided.
  • the bearing can, for example, simply be introduced into the receiving space, so that the drill head tip is at least partially surrounded on the circumference by the bearing.
  • the bearing is bush-like, in particular designed as a sliding bush.
  • the bearing can thus be a tubular component which is arranged in the receiving space and receives the drill head tip with a substantially precise fit. Simple handling and manufacture of the device can be achieved in that the bearing is designed in one piece in the form of a bush.
  • the bearing as such can easily be removed as such and easily replaced again.
  • the bearing can in particular be arranged in the receiving space and designed in such a way that only sliding surfaces for the drill head tip are exposed.
  • the bearing can be designed without a stop surface which is oriented transversely to the longitudinal axis of the drill head tip.
  • the drill head tip and the bearing can only have pairs of contact surfaces which are essentially aligned along the longitudinal axis of the drill head tip.
  • An end of the bearing facing the percussion piston can be present in the receiving space without impinging on a further element of the drill head, in particular the drill head tip.
  • the bearing can essentially only be acted upon or come into contact with outer surfaces of the drill head tip aligned along the longitudinal axis of the drill head tip.
  • the bearing has several segments, whereby it can be achieved, for example, that material for the bearing is saved or different material pairings and / or lubrications over the course of the circumference by means of a liquid or lubricant and / or different segments are possible is. It is also possible to provide segments that are identical or configured identically to one another and that can be installed or exchanged individually.
  • the bearing has a material different from the drill head tip.
  • the material or the material for the bearing is selected to be “softer” than the material or the material of the drill head tip so that the wear occurs predominantly on the bearing.
  • the bearing has bronze, ie a tin alloy, white metal, ie a lead-tin alloy, a bearing metal alloyed with lead, an aluminum alloy, a plastic, for example PTFE, a ceramic that is fiber-reinforced can be, or a brass alloy.
  • bronze ie a tin alloy
  • white metal ie a lead-tin alloy
  • a bearing metal alloyed with lead an aluminum alloy
  • a plastic for example PTFE
  • a ceramic that is fiber-reinforced can be, or a brass alloy.
  • the receiving space has an extension in the longitudinal direction of the housing in the range from 10 mm to 100 mm.
  • the dimensions are chosen so that good storage of the drill head tip in the housing can be achieved, but at the same time the extension in the longitudinal direction is kept as small as possible in order to ensure access to the bearing without removing the drill head tip.
  • the extension of the receiving space in the longitudinal direction of the housing compared to the extension of the bearing in the longitudinal direction has a ratio in the range from 1.05 to 1.5.
  • This makes it possible to make the receiving space larger in the longitudinal direction than the bearing in the longitudinal direction, whereby a free space can be created in the receiving space through which access to the bearing in the receiving space can be given.
  • the free space can be used to apply an extractor or puller to the bearing and to pull the bearing out of the receiving space of the housing.
  • the bearing can preferably be arranged in a receiving space enlarged in the longitudinal direction in such a way that the bearing is flush with the front side, i.e.
  • the side facing the drill head tip on the front side is aligned so that the free space is formed on the side facing away from the front side. Tolerances are possible here, so that the bearing is also arranged offset on the front side in relation to the housing in the receiving space. Due to the greater extent of the receiving space in the longitudinal direction of the housing compared to the extent of the bearing in the longitudinal direction, the end of the bearing which is opposite the front side can be exposed or accessed.
  • the inside diameter of the housing outside the bearing is oversized compared to the outside diameter of the drill head tip, so that the bearing mainly supports the drill head tip.
  • the oversize creates the possibility that the contact between the drill head tip and the housing is as small as possible and is concentrated on the bearing.
  • the bearing is held in the housing by means of a press fit or an adhesive press fit.
  • a press fit or an adhesive press fit This enables a particularly simple connection between the bearing and the housing. In particular, no screw connection is necessarily released.
  • an extractor can be used to reach behind the bearing in order to be able to separate the bearing for replacement from the housing or, if necessary, to be able to pull it out of the receiving space.
  • the drill head tip can be pushed into the housing to such an extent that the bearing can be accessed, especially if attachments have possibly been removed. Access takes place in particular from the end of the bearing facing the slag piston.
  • An extractor can act here and pull the bearing off or out.
  • the invention also provides a method for producing a device for drilling in the ground, such as is described above, for example.
  • the method for manufacturing the device comprises the steps of: providing a housing and providing a drill head tip that is longitudinally movable in the housing, and arranging the drill head tip in the housing. Between the housing and the drill head tip, a bearing for the drill head tip for longitudinal movement is introduced.
  • the invention also provides a method for maintaining a device for drilling in the earth, in particular as described above, the method comprising the steps of: providing the device, which has a housing and a drill head tip which is longitudinally movable in the housing; access a bearing arranged between the housing and the drill head tip and pulling the bearing off.
  • the term "access” is understood to mean removing the bearing and / or inserting the bearing which, in connection with the removal of the bearing, describes removal of the bearing from the housing, in which the bearing can be separated from the housing without loosening a screw connection .
  • the aspect of the method for servicing a device for drilling in the ground relates in an analogous manner to the statements relating to the aspect of the device for drilling in the ground itself.
  • the construction and configuration of the device resulting from this is also reflected in the method for maintenance. For example, in the method for maintaining the device for drilling in the ground, it can be taken into account that, in particular, a bearing accessible on the drill head side can be accessed.
  • the invention also provides a use of a device for drilling in the earth, which device has a housing and a longitudinally movable drill head tip arranged on the housing, and uses a bearing for the drill head tip.
  • the naming of a numerical value includes not only the actual numerical value, but also - in order to take into account manufacturing tolerances in particular - a range around the specific numerical value that is +/- 15%, preferably +/- 10%, of the specified numerical value can.
  • Fig. 1 shows a drill head-side section of a device for drilling in the ground.
  • a drill head tip 1 which is arranged in a housing 2.
  • a receiving space 3 is formed in the housing 2 at the end.
  • the receiving space 3 is accessible from the drill head side, ie from the front.
  • a bearing 4 is arranged in the receiving space 3.
  • the receiving space 3 with the bearing 4 is covered on the front side by means of an attachment 5 attached to the drill head tip 1.
  • a further attachment 6 which is movable along the axis and which is also connected to the drill head tip 1 is provided. If the attachments 5 and 6 are removed, the bearing 4 in the receiving space 3 can be accessed without the drill head tip 1 having to be dismantled.
  • An annular circumferential seal 25, which is arranged in a corresponding groove, is provided for sealing between the attachment 5 and the housing 2.
  • the housing 2 is connected to a housing 7 in which an impact piston 10 is arranged.
  • the drill head tip 1 has an exposed end which comes into contact with the ground.
  • an anvil 8 is formed, which can be acted upon by the percussion piston 10.
  • annular spring 9 is provided, which is arranged between the drill head tip 1 and the housing 2.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung zum Bohren in Erdreich aufweisend ein Gehäuse, eine in dem Gehäuse angeordnete längsbewegliche Bohrkopfspitze und ein Lager zur Lagerung der Bohrkopfspitze im Gehäuse bei der Längsbewegung.The invention relates to a device for drilling in the ground comprising a housing, a longitudinally movable drill head tip arranged in the housing and a bearing for mounting the drill head tip in the housing during the longitudinal movement.

Description

Die Erfindung betrifft eine Vorrichtung zum Bohren in Erdreich, ein Verfahren zum Herstellen einer Vorrichtung zum Bohren in Erdreich, ein Verfahren zum Warten einer Vorrichtung zum Bohren in Erdreich sowie eine Verwendung einer Vorrichtung zum Bohren in Erdreich.The invention relates to a device for drilling in the ground, a method for producing a device for drilling in the ground, a method for servicing a device for drilling in the ground and a use of a device for drilling in the ground.

Aus DE 101 12 985 A1 ist ein Schlagkopf bekannt, der einen Meißel mit einer Schlagspitze und einem Amboss für den Schlagkolben besitzt. Der Meißel ist in einer Bohrung einer Basis angeordnet, die gleichzeitig als Adapter zum Einschrauben in einen Schlaggerätekorpus dient.Out DE 101 12 985 A1 a striking head is known which has a chisel with a striking point and an anvil for the striking piston. The chisel is arranged in a hole in a base, which also serves as an adapter for screwing into an impact device body.

Obwohl mit den bekannten Schlagköpfen sehr gute Ergebnisse erzielt werden und auch eine hohe Lebensdauer erreichbar ist, liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung zum Bohren in Erdreich, ein Verfahren zum Herstellen einer Vorrichtung zum Bohren in Erdreich, ein Verfahren zum Warten einer Vorrichtung zum Bohren in Erdreich sowie eine Verwendung einer Vorrichtung zum Bohren in Erdreich zu schaffen, bei dem bzw. der eine Verbesserung im Hinblick auf Wartung, Lebensdauer und/oder Amortisation der Kosten, die für eine derartige Vorrichtung aufgewendet werden, möglich ist.Although very good results can be achieved with the known impact heads and a long service life can also be achieved, the object of the invention is to provide a device for drilling in the ground, a method for producing a device for drilling in the ground, a method for maintaining a device for To create drilling in the ground and a use of a device for drilling in the ground, in which an improvement in terms of maintenance, service life and / or amortization of the costs that are expended for such a device is possible.

Die Aufgabe wird gelöst durch die Gegenstände der unabhängigen Ansprüche. Vorteilhafte Ausführungsformen sind Gegenstand der jeweiligen Unteransprüche und der Beschreibung.The object is achieved by the subjects of the independent claims. Advantageous embodiments are the subject of the respective subclaims and the description.

Kerngedanke der Erfindung ist es, ein Lager vorzusehen, mit dem die Bohrkopfspitze im Gehäuse bei der Längsbewegung gelagert ist. Hierdurch kann vermieden werden, dass - anders als im Stand der Technik - der Werkstoff der Bohrkopfspitze mit dem Werkstoff des Gehäuses direkt in Berührung kommt. Aufgrund der im Bereich des Erdbohrens vorliegenden harschen Bedingungen wird meist für die Bohrkopfspitze und das Gehäuse Stahl verwendet, so dass im Stand der Technik Stahl auf Stahl reibt und ein Verschleiß am Gestänge und/oder an der Bohrkopfspitze vorliegen kann. Durch ein Lager kann die Möglichkeit geschaffen werden, dass das Lager verschleißt, während der Verschleiß am Gehäuse und/oder der Bohrkopfspitze gering gehalten werden kann.The core idea of the invention is to provide a bearing with which the drill head tip is mounted in the housing during the longitudinal movement. In this way, it can be avoided that - unlike in the prior art - the material of the drill head tip comes into direct contact with the material of the housing. Due to the harsh conditions in the field of earth drilling, steel is mostly used for the drill head tip and the housing, so that in the prior art steel rubs against steel and wear on the rod and / or on the drill head tip can occur. A bearing makes it possible for the bearing to wear, while the wear on the housing and / or the drill head tip can be kept low.

Die Erfindung schafft eine Vorrichtung zum Bohren in Erdreich. Die Vorrichtung weist ein Gehäuse und eine in dem Gehäuse angeordnete längsbewegliche Bohrkopfspitze auf. Die Vorrichtung weist ferner ein Lager zur Lagerung der Bohrkopfspitze im Gehäuse bei der Längsbewegung auf.The invention provides a device for drilling in the ground. The device has a housing and a longitudinally movable drill head tip arranged in the housing. The device also has a bearing for mounting the drill head tip in the housing during the longitudinal movement.

Der Begriff "Erdreich" im Sinne der vorliegenden Beschreibung umfasst insbesondere jede Art von Material, insbesondere Erde, Sand, Fels, Gestein und Mischformen hiervon, in das bestehende oder zu erstellende, vorzugsweise zumindest abschnittsweise horizontale, Kanäle bzw. Bohrungen, insbesondere Erdkanäle einschließlich Erdbohrungen, Felsbohrungen oder Erdleitungen sowie unterirdische oder oberirdische Rohrleitungen und Wasserkanäle, die sich durch Einsatz einer entsprechenden Vorrichtung zum Bohren in Erdreich herstellen oder einziehen lassen, eingebracht werden können.The term "soil" in the context of the present description includes in particular any type of material, in particular earth, sand, rock, rock and mixed forms thereof, in the existing or to be created, preferably at least partially horizontal, channels or bores, in particular earth channels including earth bores , Rock boreholes or underground lines as well as underground or above-ground pipelines and water channels that can be created or pulled into the ground by using a suitable device for drilling.

Unter einer "Vorrichtung zum Bohren in Erdreich" wird jede Vorrichtung verstanden, welche insbesondere einen Gestängeschüsse aufweisenden Bohrstrang in einem bestehenden oder zu erstellenden Kanal im Erdreich bewegt, um eine Bohrung, insbesondere eine Horizontalbohrung (HD), zu erstellen oder aufzuweiten oder Rohrleitungen oder andere lange Körper in das Erdreich einzuziehen. Bei der Vorrichtung zum Bohren in Erdreich kann es sich insbesondere um eine HD-Vorrichtung handeln. Eine Vorrichtung zum Bohren in Erdreich kann damit eine einen Bohrstrang antreibende Vorrichtung sein, die erdreichverdrängend arbeitet, und den Bohrstrang translatorisch und/oder rotatorisch in längsaxialer Richtung des Bohrstranges in das Erdreich einbringt. Eine Bohrung kann durch Zug- oder Druckbeaufschlagung auf den Bohrstrang in das Erdreich eingebracht werden.A "device for drilling in the ground" is understood to mean any device which moves in particular a drill string comprising rods in an existing or to be created channel in the ground in order to create or widen a hole, in particular a horizontal hole (HD), or pipelines or others pulling long bodies into the ground. The device for drilling in the ground can in particular be a high-pressure device. A device for drilling in the ground can thus be a device which drives a drill string and which works in a soil-displacing manner and introduces the drill string into the soil in a translatory and / or rotary manner in the longitudinal axial direction of the drill string. A borehole can be drilled into the ground by applying tension or pressure to the drill string.

Der Begriff "HD" (horizonal drilling, Horizontalbohrung) im Sinne der vorliegenden Beschreibung umfasst insbesondere eine zumindest teilweise horizontal angeordnete Bohrung bzw. Kanal oder Rohrleitung.The term "HD" (horizontal drilling) in the context of the present description includes in particular an at least partially horizontally arranged bore or channel or pipeline.

In einer besonders bevorzugten Ausführungsform kann die Vorrichtung zum Bohren in Erdreich eine Rammbohrvorrichtung sein. Der Begriff "Rammbohrvorrichtung" oder "Erdrakete", der im Wesentlichen synonym zur Rammbohrvorrichtung verwendet wird, umfasst im Sinne der Beschreibung ein selbstgetriebenes Schlaggerät, welches erdreichverdrängend arbeitet, und eine Bohrung, eine Leitung und/oder ein Rohr schlagend in das Erdreich einbringen kann. Dabei umfasst der Begriff Rammbohrvorrichtung Erdverdrängungsvorrichtungen, bei denen die Bohrkopfspitze längsbeweglich in einem Gehäuse angeordnet ist. Bei der Bohrkopfspitze kann es sich insbesondere um einen Meißel handeln. Eine Rammbohrvorrichtung kann sowohl eine Ein-Takt-Vorrichtung als auch eine Zwei-Takt-Vorrichtung sein. Eine Drei-Takt-Vorrichtung ist ebenfalls möglich. Eine Rammbohrvorrichtung kann sowohl eine Ein-Takt-Vorrichtung als auch eine mit mehreren Takten arbeitende Vorrichtung, insbesondere eine Zwei-Takt-Vorrichtung, sein. Bei einer Ein-Takt-Vorrichtung trifft der Schlagkolben auf die Bohrkopfspitze und im gleichen Moment auf das Gehäuse. Bei einer mehrtaktigen Vorrichtung, insbesondere einer Zwei-Takt-Vorrichtung, schlägt zunächst der Schlagkolben auf die Bohrkopfspitze, die im ersten Takt vorauseilt. Das Gehäuse wird in einem folgenden Takt, insbesondere im zweiten Takt, vom Schlagkolben beaufschlagt. Spitzenwiderstand und Mantelreibung werden bei einer mehrtaktigen Vorrichtung getrennt, und abwechselnd leichter überwunden. Bei einer mehrtaktigen Vorrichtung, insbesondere einer Zwei-Takt-Vorrichtung, kann eine bessere Energieumsetzung erfolgen, die insbesondere die Zertrümmerung von Hindernissen infolge der Konzentration des Schlagimpulses auf die Bohrkopfspitze erleichtert. Infolge der entsprechend dem Hubweg der Bohrkopfspitze vorauseilenden Bodenverdrängung bleibt das Gehäuse in ruhiger Lage und gewährleistet dadurch eine relativ gute Laufstabilität.In a particularly preferred embodiment, the device for drilling in the ground can be a ram drilling device. The term "ram boring device" or "earth rocket", which is essentially used synonymously with the ram boring device, includes in the sense of the description a self-propelled percussion device which works to displace the soil and can hammer a bore, a line and / or a pipe into the ground. The term ram boring device includes earth displacement devices in which the drill head tip is arranged to be longitudinally movable in a housing. The drill head tip can in particular be a chisel. A ram boring device can be both a one-stroke device and a two-stroke device. A three-stroke device is also possible. A ram boring device can be both a single-cycle device and a device operating with several cycles, in particular a two-cycle device. With a one-stroke device, the percussion piston hits the drill head tip and at the same time hits the housing. In the case of a multi-cycle device, in particular a two-cycle device, the percussion piston first hits the drill head tip, which runs ahead in the first cycle. The housing is acted upon by the percussion piston in a subsequent cycle, in particular in the second cycle. Tip resistance and skin friction are separated in a multi-cycle device, and alternately more easily overcome. With a multi-cycle device, in particular a two-cycle device, better energy conversion can take place, which in particular facilitates the breaking up of obstacles as a result of the concentration of the impact pulse on the drill head tip. As a result of the displacement of the ground leading in accordance with the stroke of the drill head tip, the housing remains in a quiet position and thereby ensures relatively good running stability.

Der Begriff "Bohrkopfspitze" im Sinne der Beschreibung ist ein bohrkopfseitiges Element, welches ein nach außen gerichtetes bzw. exponiertes Ende aufweist, welches beim Bohren in Kontakt mit dem Erdreich gelangt. Die Bohrkopfspitze bildet den vorderen Bereich des Bohrstrangs, der zum Einbringen der Erdbohrung in das Erdreich als erstes in Kontakt mit dem zu verdrängenden Erdreich gelangt. Das nach außen gerichtete Ende der Bohrkopfspitze kann eine Schlagspitze aufweisen, welche insbesondere eine Stufengeometrie aufweisen kann und bevorzugt eine Schneidkante aufweist. Die Bohrkopfspitze kann eine nicht-spitz zulaufende vorderseitige Geometrie aufweisen. Bei der Bohrkopfspitze kann es sich insbesondere um einen Meißel handeln. Die Bohrkopfspitze kann ein einem Schlagkolben zugewandtes Ende aufweisen, auf das der Schlagkolben auftreffen kann (ambosseitiges Ende der Bohrkopfspitze). Die Bohrkopfspitze kann einen in Bezug auf die Bohrkopfspitze axial fixierten Aufsatz, insbesondere einen Stufenaufsatz aufweisen. Die Bohrkopfspitze kann alternativ oder zusätzlich einen in Bezug auf die Bohrkopfspitze axial verschiebbaren Aufsatz, insbesondere einen Stufenaufsatz, aufweisen. Die Bohrkopfspitze kann in dem Gehäuse mittels einer, insbesondere in einem Ringraum zwischen der Bohrkopfspitze und dem Gehäuse, angeordneten Feder vorgespannt sein, um die Bohrkopfspitze in ihrer Grundstellung zu halten bzw. in diese zurückzubewegen. Die Bohrkopfspitze kann ein Element sein, mit dem die Verdrängungsarbeit der Vorrichtung zum Bohren in Erdreich vorderseitig des Bohrstrangs durchgeführt werden kann. Die Bohrkopfspitze ist nicht notwendigerweise einstückig ausgeführt. Die Bohrkopfspitze kann auch aus mehreren Segmenten, die in Längsrichtung hintereinander angeordnet sind, gebildet werden. In einer bevorzugten Ausführungsform ist die Bohrkopfspitze einstückig zumindest im Bereich des Gehäuses ausgebildet. Sofern Aufsätze auf der Bohrkopfspitze vorhanden sind, so können diese als lösbare Aufsätze ausgestaltet sein.The term "drill head tip" in the sense of the description is an element on the drill head side which has an outwardly directed or exposed end which comes into contact with the ground during drilling. The tip of the drill head forms the front area of the drill string which, for the introduction of the earth bore into the earth, first comes into contact with the earth to be displaced. The outwardly directed end of the drill head tip can have an impact point, which in particular can have a step geometry and preferably has a cutting edge. The drill head tip can have a non-tapered front-side geometry. The drill head tip can in particular be a chisel. The drill head tip can have an end facing a percussion piston, on which the percussion piston can strike (anvil-side end of the drill head tip). The drill head tip can be an attachment axially fixed in relation to the drill head tip, in particular have a step attachment. The drill head tip can alternatively or additionally have an attachment that can be axially displaced with respect to the drill head tip, in particular a stepped attachment. The drill head tip can be prestressed in the housing by means of a spring arranged in particular in an annular space between the drill head tip and the housing, in order to hold the drill head tip in its basic position or to move it back into it. The drill head tip can be an element with which the displacement work of the device for drilling in earth can be carried out on the front side of the drill string. The drill head tip is not necessarily made in one piece. The drill head tip can also be formed from several segments that are arranged one behind the other in the longitudinal direction. In a preferred embodiment, the drill head tip is formed in one piece at least in the area of the housing. If there are attachments on the drill head tip, they can be designed as detachable attachments.

Das Lager ist im Sinne der Beschreibung ein zusätzliches Element im Gehäuse. Das Lager ist vorzugsweise nicht einstückig mit dem Gehäuse ausgebildet. Selbst bei einem Verschleiß des Lagers, können unter Umständen Gehäuse und Bohrkopfspitze weiter verwendet werden, sofern das Lager ausgetauscht wird. Es wurde erstmals erkannt, dass ein zusätzliches Bauelement eine Verbesserung im Sinne der zu lösenden Aufgabe bietet, obwohl man davon ausgegangen war, dass das Vorsehen eines Lagers die Komplexität und den Aufbau erhöht. Das Lager ist insbesondere im Sinne der Beschreibung separat zum Gehäuse und/oder von diesem trennbar ausgestaltet. Das Lager weist vorzugsweise ein anderes Material als das Material des Gehäuses auf. Das Lager kann als einfaches Drehteil hergestellt sein bzw. als solches ausgestaltet sein. Eine Fertigung mittels Drehen ist einfach handhabbar, genau und kostengünstig. Das Lager kann insbesondere einstückig sein. Das Lager kann insbesondere einen geschlossenen Umfang, insbesondere einen geschlossenen Innenumfang haben.In the sense of the description, the bearing is an additional element in the housing. The bearing is preferably not formed in one piece with the housing. Even if the bearing wears out, the housing and drill head tip can still be used if the bearing is replaced. It was recognized for the first time that an additional component offers an improvement in terms of the task to be solved, although it was assumed that the provision of a bearing increases the complexity and the structure. In the sense of the description, the bearing is designed separately from the housing and / or separable from it. The bearing preferably has a different material than the material of the housing. The bearing can be manufactured as a simple rotating part or designed as such. Manufacturing by means of turning is easy to handle, precise and inexpensive. The bearing can in particular be in one piece. The bearing can in particular have a closed circumference, in particular a closed inner circumference.

Das Gehäuse im Sinne der Beschreibung kann zumindest abschnittsweise rohrförmig ausgestaltet sein. Das Gehäuse kann einen beliebigen Querschnitt aufweisen, der insbesondere rund, kreisförmig und/oder ellipsenförmig sein kann. Das Gehäuse weist vorzugsweise einen sich in Längserstreckung durch das Gehäuse erstreckenden Kanal auf, in dem die Bohrkopfspitze angeordnet werden kann. Längserstreckung des Gehäuses und Längserstreckung der Bohrkopfspitze können dabei korrespondieren. In dem Gehäuse kann auch ein Schlagkolben, insbesondere wenn es sich bei der Vorrichtung zum Bohren in Erdreich um eine Rammbohrvorrichtung handelt, angeordnet sein. Es ist möglich, dass das Gehäuse, in dem die Bohrkopfspitze angeordnet sein kann, mit einem weiteren Gehäuse verbunden werden kann, in dem der Schlagkolben - im Falle einer Rammbohrvorrichtung - angeordnet ist. Im Falle, dass das Gehäuse mit einem weiteren Gehäuse verbunden wird, indem beispielsweise ein Schlagkolben angeordnet ist, der die Bohrkopfspitze beaufschlagen kann, kann an dem Gehäuse für die Bohrkopfspitze eine, insbesondere endseitig angeordnete, Strukturierung zum Verbinden vorgesehen sein, die korrespondierend zu einer Strukturierung am Gehäuse für den Schlagkolben ausgebildet ist. Der Begriff Gehäuse kann eine die Bohrkopfspitze umfangsseitig zumindest abschnittsweise umgebende feste Hülle, insbesondere aus Metall, insbesondere aus Stahl, umfassen. Bei dem Gehäuse kann es sich insbesondere um einen Teil eines Gehäuses einer Rammbohrvorrichtung handeln, die mit dem Gehäuse, in dem der Schlagkolben angeordnet ist, verbunden werden kann. Das Gehäuse kann in diesem Sinne ein sogenanntes Vordergehäuse sein, welches mit dem Gehäuse für den Schlagkolben beispielsweise mittels Verschrauben, Verkleben, Aufschrumpfen oder einer Kombination der vorgenannten Verfahren verbunden werden kann. Sofern das Gehäuse ein Abschnitt eines Gehäuses ist, welches mit dem Gehäuse, in dem der Schlagkolben angeordnet ist, verbunden werden kann, so kann das Gehäuse im Verbindungsbereich einen geringeren Querschnitt aufweisen als das Gehäuse, in dem der Schlagkolben angeordnet ist. Das Gehäuse, in dem die Bohrkopfspitze angeordnet ist, kann in das Gehäuse, in dem der Schlagkolben angeordnet ist, eingesetzt werden. Sofern das Gehäuse, in dem die Bohrkopfspitze angeordnet ist, in das Gehäuse, in dem der Schlagkolben angeordnet ist, eingesetzt wird, so kann durch das Einsetzen der Fall eintreten, dass die Bohrkopfspitze auch - zumindest endseitig bzw. teilweise - in dem Gehäuse, in dem der Schlagkolben angeordnet ist, angeordnet ist.The housing in the sense of the description can be designed tubular at least in sections. The housing can have any cross section, which can in particular be round, circular and / or elliptical. The housing preferably has a channel extending longitudinally through the housing in which the drill head tip can be arranged. The longitudinal extension of the housing and the longitudinal extension of the drill head tip can correspond. A percussion piston can also be arranged in the housing, in particular if the device for drilling in the ground is a ram drilling device. It is possible that the housing in which the drill head tip can be arranged can be connected to a further housing in which the percussion piston - in the case of a ram drilling device - is arranged. In the event that the housing is connected to a further housing, for example by a percussion piston is arranged, which can act on the drill head tip, a structuring, in particular arranged at the end, can be provided on the housing for the drill head tip for connecting, which is designed to correspond to a structuring on the housing for the percussion piston. The term housing can encompass a solid casing, in particular made of metal, in particular steel, which surrounds the drill head tip at least in sections on the circumferential side. The housing can in particular be a part of a housing of a ram drilling device which can be connected to the housing in which the percussion piston is arranged. In this sense, the housing can be a so-called front housing, which can be connected to the housing for the percussion piston, for example by means of screwing, gluing, shrinking, or a combination of the aforementioned methods. If the housing is a section of a housing which can be connected to the housing in which the percussion piston is arranged, the housing in the connection area can have a smaller cross section than the housing in which the percussion piston is arranged. The housing in which the drill head tip is arranged can be inserted into the housing in which the percussion piston is arranged. If the housing in which the drill head tip is arranged is inserted into the housing in which the percussion piston is arranged, the insertion can result in the drill head tip also - at least at the end or partially - in the housing, in which the percussion piston is arranged, is arranged.

In einer bevorzugten Ausführungsform weist das Gehäuse einen Aufnahmeraum auf, in dem das Lager für die Bohrkopfspitze angeordnet werden kann. Im bestimmungsgemäßen Zustand weist der Aufnahmeraum das Lager für die Bohrkopfspitze auf. Hierdurch kann an einer definierten Stelle ein Lager vorgesehen werden, welches zur Lagerung der Bohrkopfspitze im Gehäuse bei der Längsbewegung vorgesehen ist. Bei dem Aufnahmeraum kann es sich um einen einfach herzustellenden Raum handeln, der beispielsweise mittels einer Aussparung im Gehäuse gebildet werden kann. Beispielsweise kann der Aufnahmeraum mittels eines Drehens, Fräsens, Bohrens, Funkenerodierens usw. gebildet werden. Der Aufnahmeraum kann eine Vertiefung im Gehäuse sein, die als Nut ausgestaltet sein kann und zumindest teilweise umfangsseitig innen am Gehäuse ausgebildet ist. Der Aufnahmeraum kann als eine sich in radialer Richtung erstreckende ringförmige Vertiefung in der Innenkontur des Gehäuses ausgebildet sein. Der Aufnahmeraum kann insbesondere eine nicht strukturierte bzw. unstrukturierte Oberfläche, d.h. im Wesentlichen glatte Oberfläche, aufweisen.In a preferred embodiment, the housing has a receiving space in which the bearing for the drill head tip can be arranged. In the intended state, the receiving space has the bearing for the drill head tip. In this way, a bearing can be provided at a defined point, which is provided for mounting the drill head tip in the housing during the longitudinal movement. The receiving space can be a space that is easy to produce and can be formed, for example, by means of a recess in the housing. For example, the receiving space can be formed by means of turning, milling, drilling, spark erosion, etc. The receiving space can be a recess in the housing, which can be designed as a groove and is at least partially designed on the inside of the housing on the circumferential side. The receiving space can be designed as an annular recess extending in the radial direction in the inner contour of the housing. The receiving space can in particular have an unstructured or unstructured surface, i.e. substantially smooth surface.

In einer bevorzugten Ausführungsform ist der Aufnahmeraum bohrkopfseitig zugänglich. Der Aufnahmeraum kann damit von vorne zugänglich sein. Von vorne ist bezogen auf den Vorlauf einer Vorrichtung zum Bohren in Erdreich der Bereich, der zuerst mit dem Erdreich in Kontakt gelangt bzw. das Erdreich zuerst verdrängt. Der Aufnahmeraum kann von der Seite aus zugänglich sein, die beabstandet von der Seite des Gehäuses ist, die dem Schlagkolben bzw. dem ambosseitigen Ende der Bohrkopfspitze beabstandet ist. Hierdurch kann eine Möglichkeit geschaffen werden, auf das Lager zuzugreifen, ohne die Bohrkopfspitze und das Gehäuse zu demontieren. Gegebenenfalls sind Aufsätze auf der Bohrkopfspitze zu demontieren, aber eine Demontage des Gehäuses mit der Bohrkopfspitze oder der Bohrkopfspitze vom Gehäuse ist nicht notwendig. Das Lager kann einfach ausgetauscht werden. Gegebenenfalls kann die Bohrkopfspitze in Richtung des Schlagkolbens verschoben werden, um auf das Lager zugreifen zu können. Der Aufnahmeraum kann durch einen auf der Bohrkopfspitze angeordneten Aufsatz verdeckt werden. Ein derartiger Aufsatz kann mittels eines oder mehrerer Befestigungsbolzen an der Bohrkopfspitze an einer vorgegebenen Position befestigt werden. Ein den Aufnahmeraum vorderseitig verdeckender Aufsatz kann das Gehäuse vorderseitig umgreifen. Zwischen Gehäuse und Aufsatz kann eine Dichtung vorhanden sein, die im Kontaktbereich zwischen Gehäuse und Aufsatz eine Dichtung gegenüber Partikeln und/oder Fluid schafft. Hierdurch kann beispielsweise sichergestellt werden, dass in den Aufnahmeraum kein Schmutz oder ähnliches eindringen kann.In a preferred embodiment, the receiving space is accessible on the drill head side. The receiving space can thus be accessible from the front. From the front, in relation to the advance of a device for drilling in the ground, the area which first comes into contact with the ground or which first displaces the ground. The recording room can be accessible from the side that is spaced apart from the side of the housing that is spaced from the percussion piston or the anvil-side end of the drill head tip. In this way, a possibility can be created to access the bearing without dismantling the drill head tip and the housing. If necessary, attachments on the drill head tip have to be dismantled, but it is not necessary to dismantle the housing with the drill head tip or the drill head tip from the housing. The bearing can easily be exchanged. If necessary, the drill head tip can be moved in the direction of the percussion piston in order to be able to access the bearing. The receiving space can be covered by an attachment arranged on the tip of the drill head. Such an attachment can be fastened to the drill head tip at a predetermined position by means of one or more fastening bolts. An attachment covering the receiving space on the front side can encompass the housing on the front side. A seal can be present between the housing and the attachment which creates a seal against particles and / or fluid in the contact area between the housing and the attachment. In this way it can be ensured, for example, that no dirt or the like can penetrate into the receiving space.

Das Lager kann mittels einer entsprechenden Passung im Gehäuse gehalten werden Gehäuse und Lager können die gleiche Kontur - einmal als Innenform und einmals als Außenform - aufweisen. Insbesondere liegt eine Übermaßpassung bzw. passpassung vor. Alternativ oder zusätzlich kann ein Stoffschluss zwischen Gehäuse und Lager ausgebildet sein, insbesondere mittels eines Klebers. Es kann beispielsweise auf eine Gewindeverbindung zwischen dem Lager und dem Gehäuse verzichtet werden, was die Komplexität des Aufbaus verringert und/oder die Kräfte, die von dem Lager auf das Gehäuse wirken, reduziert werden. Zwischen dem Gehäuse und dem Lager bzw. dem Lager und der Bohrkopfspitze können die Kräfte, die in längsaxialer Richtung im Wesentlichen parallel zur Längsachse wirken, kleingehalten werden bzw. sind vernachlässigbar. Weder auf das Gehäuse noch auf die Bohrkopfspitze wirkt das Lager in einer anderen Richtung als der radialen Richtung ein. Das Lager weist insbesondere keine Kontaktfläche für die Bohrkopfspitze auf, deren Flächennormale einen Winkel größer als 20° mit der Längsachse der Bohrkopfspitze einschließt. Die Funktion des Lagers kann sich auf eine reine Lagerfunktion für eine längsaxiale Bewegung der Bohrkopfspitze reduzieren.The bearing can be held in the housing by means of a corresponding fit. Housing and bearing can have the same contour - once as an inner shape and once as an outer shape. In particular, there is an interference fit or fit. Alternatively or additionally, a material bond can be formed between the housing and the bearing, in particular by means of an adhesive. For example, a threaded connection between the bearing and the housing can be dispensed with, which reduces the complexity of the structure and / or the forces that act on the housing from the bearing are reduced. Between the housing and the bearing or the bearing and the drill head tip, the forces that act in the longitudinal axial direction essentially parallel to the longitudinal axis can be kept small or are negligible. The bearing acts neither on the housing nor on the drill head tip in a direction other than the radial direction. In particular, the bearing has no contact surface for the drill head tip, the surface normal of which encloses an angle greater than 20 ° with the longitudinal axis of the drill head tip. The function of the bearing can be reduced to a pure bearing function for a longitudinal axial movement of the drill head tip.

In einer bevorzugten Ausführungsform ist das Lager ein Gleitlager oder ein Wälzlager, wobei insbesondere ein Gleitlager bevorzugt ist, bei dem die sich relativ zueinander bewegenden Teile (Gehäuse und Bohrkopfspitze) direkten Kontakt haben. Insbesondere kann das Gleitlager ein Gleitlager mit Festkörperreibung, ein Gleitlager mit Flüssigkeitsreibung oder ein Gleitlager mit Mischreibung sein.In a preferred embodiment, the bearing is a plain bearing or a roller bearing, a plain bearing in particular in which the parts moving relative to one another (housing and drill head tip) are in direct contact. In particular, the sliding bearing can be a sliding bearing with solid friction, a sliding bearing with fluid friction or a sliding bearing with mixed friction.

In einer bevorzugten Ausführungsform umgibt das Lager zumindest abschnittsweise die Bohrkopfspitze umfangsseitig, so dass eine längsaxiale Führung gegeben ist. Das Lager kann beispielsweise einfach in den Aufnahmeraum eingebracht werden, so dass die Bohrkopfspitze umfangsseitig von dem Lager zumindest abschnittsweise umgeben ist.In a preferred embodiment, the bearing surrounds the drill head tip at least in sections on the circumferential side, so that longitudinal axial guidance is provided. The bearing can, for example, simply be introduced into the receiving space, so that the drill head tip is at least partially surrounded on the circumference by the bearing.

In einer bevorzugten Ausführungsform ist das Lager buchsenartig, insbesondere als Gleitbuchse ausgebildet. Das Lager kann somit ein rohrförmiges Bauelement sein, das im Aufnahmeraum angeordnet ist, und die Bohrkopfspitze im Wesentlichen passgenau aufnimmt. Es kann eine einfache Handhabung und Herstellung der Vorrichtung erreicht werden, indem das Lager einstückig in Form einer Buchse ausgebildet ist. Das Lager kann als solches gesamthaft einfach entfernt werden und einfach auch wieder ersetzt werden. Das Lager kann in dem Aufnahmeraum insbesondere derart angeordnet und derart ausgebildet sein, dass lediglich Gleitflächen für die Bohrkopfspitze exponiert sind. Insbesondere kann das Lager ohne eine Anschlagfläche, die eine Ausrichtung quer zur Längsachse der Bohrkopfspitze aufweist, ausgebildet sein. Bohrkopfspitze und Lager können lediglich Kontaktflächenpaare aufweisen, die im Wesentlichen längs der Längsachse der Bohrkopfspitze ausgerichtet sind. Ein dem Schlagkolben zugewandtes Ende des Lagers kann in dem Aufnahmeraum ohne Beaufschlagung eines weiteren Elements des Bohrkopfes, insbesondere der Bohrkopfspitze, vorliegen. Das Lager kann im Wesentlichen lediglich durch längs der Längsachse der Bohrkopfspitze ausgerichtete Außenflächen der Bohrkopfspitze beaufschlagt werden bzw. mit diesen in Kontakt kommen.In a preferred embodiment, the bearing is bush-like, in particular designed as a sliding bush. The bearing can thus be a tubular component which is arranged in the receiving space and receives the drill head tip with a substantially precise fit. Simple handling and manufacture of the device can be achieved in that the bearing is designed in one piece in the form of a bush. The bearing as such can easily be removed as such and easily replaced again. The bearing can in particular be arranged in the receiving space and designed in such a way that only sliding surfaces for the drill head tip are exposed. In particular, the bearing can be designed without a stop surface which is oriented transversely to the longitudinal axis of the drill head tip. The drill head tip and the bearing can only have pairs of contact surfaces which are essentially aligned along the longitudinal axis of the drill head tip. An end of the bearing facing the percussion piston can be present in the receiving space without impinging on a further element of the drill head, in particular the drill head tip. The bearing can essentially only be acted upon or come into contact with outer surfaces of the drill head tip aligned along the longitudinal axis of the drill head tip.

In einer bevorzugten Ausführungsform weist das Lager mehrere Segmente auf, wobei hierdurch beispielsweise erreicht werden kann, dass Material für das Lager eingespart wird bzw. unterschiedliche Materialpaarungen und/oder Schmierungen über den Verlauf des Umfangs mittels einer Flüssigkeit bzw. Schmiermittel und/oder unterschiedlichen Segmenten möglich ist. Es ist auch möglich, zueinander gleiche bzw. gleich ausgestaltete Segmente vorzusehen, die einzeln eingebaut bzw. ausgetauscht werden können.In a preferred embodiment, the bearing has several segments, whereby it can be achieved, for example, that material for the bearing is saved or different material pairings and / or lubrications over the course of the circumference by means of a liquid or lubricant and / or different segments are possible is. It is also possible to provide segments that are identical or configured identically to one another and that can be installed or exchanged individually.

In einer bevorzugten Ausführungsform weist das Lager einen von der Bohrkopfspitze unterschiedlichen Werkstoff auf. Beispielsweise kann es vorgesehen sein, dass das Material bzw. der Werkstoff für das Lager "weicher" gewählt ist als das Material bzw. der Werkstoff der Bohrkopfspitze, damit der Verschleiß vorwiegend an dem Lager auftritt.In a preferred embodiment, the bearing has a material different from the drill head tip. For example, it can be provided that the material or the material for the bearing is selected to be “softer” than the material or the material of the drill head tip so that the wear occurs predominantly on the bearing.

In einer bevorzugten Ausführungsform weist das Lager Bronze, d.h. ein Zinn-Legierung, Weißmetall, d.h. eine Blei-Zinn-Legierung, ein mit Blei legiertes Lagermetall, eine Aluminiumlegierung, einen Kunststoff, beispielsweise PTFE, eine Keramik, die faserverstärkt sein kann, oder eine Messinglegierung auf. Mit den vorgenannten Materialien bzw. Werkstoffen liegen große Erfahrungswerte vor, so dass die Handhabung vereinfacht werden kann.In a preferred embodiment, the bearing has bronze, ie a tin alloy, white metal, ie a lead-tin alloy, a bearing metal alloyed with lead, an aluminum alloy, a plastic, for example PTFE, a ceramic that is fiber-reinforced can be, or a brass alloy. There are great empirical values with the aforementioned materials, so that handling can be simplified.

In einer bevorzugten Ausführungsform weist der Aufnahmeraum eine Erstreckung in Längsrichtung des Gehäuses im Bereich von 10mm bis 100mm auf. Die Abmessungen sind dabei so gewählt, dass eine gute Lagerung der Bohrkopfspitze im Gehäuse erreicht werden kann, aber gleichzeitig auch die Erstreckung in Längsrichtung möglichst gering gehalten wird, um den Zugriff auf das Lager ohne einen Ausbau der Bohrkopfspitze zu gewährleisten.In a preferred embodiment, the receiving space has an extension in the longitudinal direction of the housing in the range from 10 mm to 100 mm. The dimensions are chosen so that good storage of the drill head tip in the housing can be achieved, but at the same time the extension in the longitudinal direction is kept as small as possible in order to ensure access to the bearing without removing the drill head tip.

In einer bevorzugten Ausführungsform weist die Erstreckung des Aufnahmeraums in Längsrichtung des Gehäuses im Vergleich zur Erstreckung des Lagers in Längsrichtung ein Verhältnis im Bereich von 1,05 bis 1,5 auf. Hierdurch kann die Möglichkeit geschaffen werden, das der Aufnahmeraum in Längsrichtung größer ausgestaltet ist als das Lager in Längsrichtung ausgebildet ist, wodurch ein Freiraum im Aufnahmeraum geschaffen werden kann, über den ein Zugriff auf das Lager im Aufnahmeraum gegeben sein kann. Beispielsweise kann der Freiraum dazu genutzt werden, einen Aus- bzw. Abzieher am Lager anzusetzen und das Lager aus dem Aufnahmeraum des Gehäuses abzuziehen. Vorzugsweise kann das Lager dabei in einem in Längsrichtung vergrößerten Aufnahmeraum derart angeordnet sein, dass das Lager bündig mit der Vorderseite d.h. der vorderseitigen Bohrkopfspitze zugewandten Seite, fluchtet, sodass der Freiraum an der Vorderseite abgewandten Seite gebildet ist. Toleranzen hierbei sind möglich, sodass das Lager auch vorderseitig versetzt zum Gehäuse im Aufnahmeraum angeordnet ist. Durch die größere Erstreckung des Aufnahmeraums in Längsrichtung des Gehäuses im Vergleich zur Erstreckung des Lagers in Längsrichtung kann das Ende des Lagers, das der Vorderseite gegenüberliegt exponiert sein, bzw. auf dieses zugegriffen werden.In a preferred embodiment, the extension of the receiving space in the longitudinal direction of the housing compared to the extension of the bearing in the longitudinal direction has a ratio in the range from 1.05 to 1.5. This makes it possible to make the receiving space larger in the longitudinal direction than the bearing in the longitudinal direction, whereby a free space can be created in the receiving space through which access to the bearing in the receiving space can be given. For example, the free space can be used to apply an extractor or puller to the bearing and to pull the bearing out of the receiving space of the housing. The bearing can preferably be arranged in a receiving space enlarged in the longitudinal direction in such a way that the bearing is flush with the front side, i.e. the side facing the drill head tip on the front side, is aligned so that the free space is formed on the side facing away from the front side. Tolerances are possible here, so that the bearing is also arranged offset on the front side in relation to the housing in the receiving space. Due to the greater extent of the receiving space in the longitudinal direction of the housing compared to the extent of the bearing in the longitudinal direction, the end of the bearing which is opposite the front side can be exposed or accessed.

In einer bevorzugten Ausführungsform weist der Innendurchmesser des Gehäuses außerhalb des Lagers ein Übermaß im Vergleich zum Außendurchmesser der Bohrkopfspitze auf, so dass eine überwiegende Lagerung der Bohrkopfspitze durch das Lager erreicht wird. Im Bereich außerhalb des Lagers wird durch das Übermaß die Möglichkeit geschaffen, dass der Kontakt zwischen der Bohrkopfspitze und dem Gehäuse möglichst gering ist und sich auf das Lager konzentriert.In a preferred embodiment, the inside diameter of the housing outside the bearing is oversized compared to the outside diameter of the drill head tip, so that the bearing mainly supports the drill head tip. In the area outside the bearing, the oversize creates the possibility that the contact between the drill head tip and the housing is as small as possible and is concentrated on the bearing.

In einer bevorzugten Ausführungsform ist das Lager mittels einer Presspassung oder einer Klebe-Presspassung im Gehäuse gehalten. Hierdurch kann eine besonders einfache Verbindung zwischen dem Lager und dem Gehäuse ermöglicht werden. Insbesondere wird keine Schraubverbindung notwendigerweise gelöst. Zum Lösen bzw. Entfernen des Lagers kann mit einem Aus- bzw. Abzieher hinter das Lager gegriffen werden, um das Lager zum Austausch von dem Gehäuse zu trennen bzw. ggf. aus dem Aufnahmeraum herausziehen zu können. Insofern kann die Bohrkopfspitze, insbesondere wenn ggf. Aufsätze entfernt wurden, soweit in das Gehäuse eingeschoben werden, dass auf das Lager zugegriffen werden kann. Der Zugriff erfolgt insbesondere von dem dem Schlackkolben zugewandten Ende des Lagers. Hier kann ein Aus- bzw. Abzieher angreifen und das Lager ab- bzw. herausziehen.In a preferred embodiment, the bearing is held in the housing by means of a press fit or an adhesive press fit. This enables a particularly simple connection between the bearing and the housing. In particular, no screw connection is necessarily released. To loosen or remove the bearing, an extractor can be used to reach behind the bearing in order to be able to separate the bearing for replacement from the housing or, if necessary, to be able to pull it out of the receiving space. In this respect, the drill head tip can be pushed into the housing to such an extent that the bearing can be accessed, especially if attachments have possibly been removed. Access takes place in particular from the end of the bearing facing the slag piston. An extractor can act here and pull the bearing off or out.

Die Erfindung schafft auch ein Verfahren zum Herstellen einer Vorrichtung zum Bohren in Erdreich, wie sie beispielsweise vorstehend beschrieben ist. Das Verfahren zum Herstellen der Vorrichtung umfasst die Schritte: Bereitstellen eines Gehäuses und Bereitstellen einer im Gehäuse längsbeweglichen Bohrkopfspitze sowie Anordnen der Bohrkopfspitze im Gehäuse. Zwischen dem Gehäuse und der Bohrkopfspitze wird ein Lager für die Bohrkopfspitze für die Längsbewegung eingebracht. Die vorstehenden Ausführungen zum Aspekt der Vorrichtung zum Bohren in Erdreich gelten dem Aspekt des Verfahrens in analoger Weise.The invention also provides a method for producing a device for drilling in the ground, such as is described above, for example. The method for manufacturing the device comprises the steps of: providing a housing and providing a drill head tip that is longitudinally movable in the housing, and arranging the drill head tip in the housing. Between the housing and the drill head tip, a bearing for the drill head tip for longitudinal movement is introduced. The above statements on the aspect of the device for drilling in the ground apply analogously to the aspect of the method.

Die Erfindung schafft auch ein Verfahren zum Warten einer Vorrichtung zum Bohren in Erdreich, insbesondere wie sie vorstehend beschrieben ist, wobei das Verfahren die Schritte umfasst: Bereitstellen der Vorrichtung, die ein Gehäuse und eine im Gehäuse längsbewegliche Bohrkopfspitze aufweist; zugreifen auf ein zwischen dem Gehäuse und der Bohrkopfspitze angeordnetes Lager sowie Abziehen des Lagers. Unter dem Begriff "zugreifen" wird eine Entnahme des Lagers und/oder ein Einsetzen des Lagers verstanden, die im Zusammenhang mit dem Abziehen des Lagers eine Entnahme des Lagers aus dem Gehäuse beschreibt, bei der das Lager ohne Lösen einer Schraubverbindung vom Gehäuse getrennt werden kann. Der Aspekt des Verfahrens zum Warten einer Vorrichtung zum Bohren in Erdreich betrifft in analoger Weise die Ausführungen zum Aspekt der Vorrichtung zum Bohren in Erdreich selbst. Die sich hieraus ergebende Konstruktion und Ausgestaltung der Vorrichtung spiegelt sich auch in dem Verfahren zur Wartung wieder. Beispielsweise kann bei dem Verfahren zur Wartung der Vorrichtung zum Bohren in Erdreich berücksichtigt werden, dass insbesondere auf ein bohrkopfseitig zugängliches Lager zugegriffen werden kann.The invention also provides a method for maintaining a device for drilling in the earth, in particular as described above, the method comprising the steps of: providing the device, which has a housing and a drill head tip which is longitudinally movable in the housing; access a bearing arranged between the housing and the drill head tip and pulling the bearing off. The term "access" is understood to mean removing the bearing and / or inserting the bearing which, in connection with the removal of the bearing, describes removal of the bearing from the housing, in which the bearing can be separated from the housing without loosening a screw connection . The aspect of the method for servicing a device for drilling in the ground relates in an analogous manner to the statements relating to the aspect of the device for drilling in the ground itself. The construction and configuration of the device resulting from this is also reflected in the method for maintenance. For example, in the method for maintaining the device for drilling in the ground, it can be taken into account that, in particular, a bearing accessible on the drill head side can be accessed.

Die Erfindung schafft auch eine Verwendung einer Vorrichtung zum Bohren in Erdreich, die ein Gehäuse und eine am Gehäuse angeordnete längsbewegliche Bohrkopfspitze aufweist, und ein Lager für die Bohrkopfspitze verwendet.The invention also provides a use of a device for drilling in the earth, which device has a housing and a longitudinally movable drill head tip arranged on the housing, and uses a bearing for the drill head tip.

Im Sinne der Beschreibung umfasst die Nennung eines Zahlenwertes nicht nur den eigentlichen Zahlenwert, sondern auch - um insbesondere fertigungstechnische Toleranzen zu berücksichtigen - einen Bereich um den konkreten Zahlenwert, der +/-15%, bevorzugt +/-10%, vom angegebenen Zahlenwert sein kann.For the purposes of the description, the naming of a numerical value includes not only the actual numerical value, but also - in order to take into account manufacturing tolerances in particular - a range around the specific numerical value that is +/- 15%, preferably +/- 10%, of the specified numerical value can.

Der Begriff "aufweisen" umfasst im Sinne der Beschreibung sowohl den dem Begriff innewohnenden Bedeutungsinhalt, dass weitere Elemente neben den genannten Elementen vorgesehen sein können (nicht abschließende Aufzählung), aber auch den Bedeutungsinhalt, dass der Begriff "aufweisen" synonym für "bestehen aus" bzw. "gebildet aus" verwendet wird.The term "have" in the sense of the description includes both the inherent meaning of the term that further elements may be provided in addition to the elements mentioned (non-exhaustive list), but also the meaning that the term "have" is synonymous with "consist of" or "formed from" is used.

Die vorstehenden Ausführungen stellen ebenso wie die nachfolgende Beschreibung beispielhafter Ausführungsformen keinen Verzicht auf bestimmte Ausführungsformen oder Merkmale dar.The above statements, like the following description of exemplary embodiments, do not represent a waiver of specific embodiments or features.

Die Erfindung wird im Folgenden beispielhaft anhand eines in der Figur dargestellten Ausführungsbeispiels näher erläutert.The invention is explained in more detail below by way of example using an exemplary embodiment shown in the figure.

In der Zeichnung zeigt:

Fig. 1
einen bohrkopfseitigen Bereich einer Vorrichtung zum Bohren in Erdreich.
The drawing shows:
Fig. 1
a drill head-side area of a device for drilling in the ground.

Fig. 1 zeigt einen bohrkopfseitigen Abschnitt einer Vorrichtung zum Bohren in Erdreich. Es ist eine Bohrkopfspitze 1 vorhanden, die in einem Gehäuse 2 angeordnet ist. Zur Lagerung der Bohrkopfspitze 1 ist im Gehäuse 2 ein Aufnahmeraum 3 endseitig ausgebildet. Der Aufnahmeraum 3 ist von der Bohrkopfseite, d.h. von vorne, zugänglich. Im Aufnahmeraum 3 ist ein Lager 4 angeordnet. Der Aufnahmeraum 3 mit dem Lager 4 wird vorderseitig mittels eines an der Bohrkopfspitze 1 befestigten Aufsatzes 5 verdeckt. Ferner ist ein weiterer längsaxial beweglicher Aufsatz 6 vorgesehen, der ebenfalls mit der Bohrkopfspitze 1 verbunden ist. Werden die Aufsätze 5 und 6 entfernt, so kann auf das Lager 4 im Aufnahmeraum 3 zugegriffen werden, ohne dass die Bohrkopfspitze 1 demontiert werden muss. Zur Abdichtung zwischen Aufsatz 5 und Gehäuse 2 ist eine ringförmige umlaufende Dichtung 25, die in einer entsprechenden Nut angeordnet ist, vorgesehen. Fig. 1 shows a drill head-side section of a device for drilling in the ground. There is a drill head tip 1 which is arranged in a housing 2. To support the drill head tip 1, a receiving space 3 is formed in the housing 2 at the end. The receiving space 3 is accessible from the drill head side, ie from the front. A bearing 4 is arranged in the receiving space 3. The receiving space 3 with the bearing 4 is covered on the front side by means of an attachment 5 attached to the drill head tip 1. Furthermore, a further attachment 6 which is movable along the axis and which is also connected to the drill head tip 1 is provided. If the attachments 5 and 6 are removed, the bearing 4 in the receiving space 3 can be accessed without the drill head tip 1 having to be dismantled. An annular circumferential seal 25, which is arranged in a corresponding groove, is provided for sealing between the attachment 5 and the housing 2.

Das Gehäuse 2 ist mit einem Gehäuse 7 verbunden, in welchem ein Schlagkolben 10 angeordnet ist. Die Bohrkopfspitze 1 weist ein exponiertes Ende auf, welches mit dem Erdreich in Kontakt gelangt. An dem dem Erdreich exponierten Ende der Bohrkopfspitze 1 gegenüberliegenden Ende ist ein Amboss 8 ausgebildet, der von dem Schlagkolben 10 beaufschlagt werden kann.The housing 2 is connected to a housing 7 in which an impact piston 10 is arranged. The drill head tip 1 has an exposed end which comes into contact with the ground. At the end of the drill head tip 1 which is exposed to the ground, an anvil 8 is formed, which can be acted upon by the percussion piston 10.

Zum Vorspannen der Bohrkopfspitze 1 gegenüber dem Gehäuse 2 ist eine Ringfeder 9 vorgesehen, die zwischen der Bohrkopfspitze 1 und dem Gehäuse 2 angeordnet ist.To pretension the drill head tip 1 with respect to the housing 2, an annular spring 9 is provided, which is arranged between the drill head tip 1 and the housing 2.

Claims (13)

Vorrichtung zum Bohren in Erdreich aufweisend - ein Gehäuse (2) und - eine in dem Gehäuse (2) angeordnete längsbewegliche Bohrkopfspitze (1), gekennzeichnet durch ein Lager (4) zur Lagerung der Bohrkopfspitze (1) im Gehäuse (2) bei der Längsbewegung.Having device for drilling in the ground - a housing (2) and - a longitudinally movable drill head tip (1) arranged in the housing (2), characterized by a bearing (4) for mounting the drill head tip (1) in the housing (2) during the longitudinal movement. Vorrichtung nach Anspruch 1, gekennzeichnet durch einen Aufnahmeraum (3) in dem Gehäuse (2), wobei der Aufnahmeraum (3) das Lager (4) für die Bohrkopfspitze (1) aufweist und bohrkopfseitig zugänglich ist.Device according to Claim 1, characterized by a receiving space (3) in the housing (2), the receiving space (3) having the bearing (4) for the drill head tip (1) and being accessible on the drill head side. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Vorrichtung eine Rammbohrvorrichtung ist.Device according to claim 1 or 2, characterized in that the device is a ram drilling device. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Lager (4) zumindest abschnittsweise die Bohrkopfspitze (1) umfangsseitig umfasst.Device according to one of Claims 1 to 3, characterized in that the bearing (4) at least in sections surrounds the drill head tip (1) on the circumferential side. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Lager (4) mehrere Segmente aufweist.Device according to one of Claims 1 to 4, characterized in that the bearing (4) has several segments. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Lager (4) einen von der Bohrkopfspitze (1) unterschiedlichen Werkstoff aufweist, insbesondere Bronze, Weißmetall, ein mit Blei legiertes Lagermetall, eine Aluminiumlegierung, einen Kunststoff, eine Keramik, die faserverstärkt sein kann, oder eine Messinglegierung aufweist.Device according to one of claims 1 to 5, characterized in that the bearing (4) has a material different from the drill head tip (1), in particular bronze, white metal, a bearing metal alloyed with lead, an aluminum alloy, a plastic, a ceramic, the can be fiber-reinforced, or has a brass alloy. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Aufnahmeraum (3) eine Erstreckung in Längsrichtung des Gehäuses (2) im Bereich von 10mm bis 100mm aufweist.Device according to one of Claims 1 to 6, characterized in that the receiving space (3) has an extension in the longitudinal direction of the housing (2) in the range from 10 mm to 100 mm. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Erstreckung des Aufnahmeraums (3) in Längsrichtung des Gehäuses (2) im Vergleich zur Erstreckung des Lagers (4) in Längsrichtung ein Verhältnis im Bereich von 1,05 bis 1,5 aufweist.Device according to one of Claims 1 to 7, characterized in that the extent of the receiving space (3) in the longitudinal direction of the housing (2) compared to the extent of the bearing (4) in the longitudinal direction has a ratio in the range from 1.05 to 1.5 having. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Innendurchmesser des Gehäuses (2) außerhalb des Lagers (4) ein Übermaß im Vergleich zum Außendurchmesser der Bohrkopfspitze (1) aufweist.Device according to one of Claims 1 to 8, characterized in that the inside diameter of the housing (2) outside the bearing (4) is oversized compared to the outside diameter of the drill head tip (1). Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Lager (4) mittels einer Presspassung oder einer Klebe- Presspassung im Gehäuse (2) gehalten ist.Device according to one of Claims 1 to 9, characterized in that the bearing (4) is held in the housing (2) by means of a press fit or an adhesive press fit. Verfahren zum Herstellen einer Vorrichtung zum Bohren in Erdreich, insbesondere einer Vorrichtung gemäß einem der Ansprüche 1 bis 10, aufweisend die Schritte: - Bereitstellen eines Gehäuses (2), - Bereitstellen einer im Gehäuse (2) längsbeweglichen Bohrkopfspitze (1) und Anordnen der Bohrkopfspitze (1) im Gehäuse (2), dadurch gekennzeichnet, dass zwischen dem Gehäuse (2) und der Bohrkopfspitze (1) ein Lager (4) für die Bohrkopfspitze (1) für die Längsbewegung eingebracht wird.Method for producing a device for drilling in the ground, in particular a device according to one of Claims 1 to 10, comprising the steps: - Provision of a housing (2), - Provision of a drill head tip (1) which is longitudinally movable in the housing (2) and arranging the drill head tip (1) in the housing (2), characterized in that a bearing (4) for the drill head tip (1) for the longitudinal movement is introduced between the housing (2) and the drill head tip (1). Verfahren zum Warten einer Vorrichtung zum Bohren in Erdreich, insbesondere einer Vorrichtung gemäß einem der Ansprüche 1 bis 10, wobei das Verfahren den Schritt umfasst: Bereitstellen eines Gehäuses (2) mit einer im Gehäuse (2) längsbeweglichen Bohrkopfspitze (1), gekennzeichnet durch ein Zugreifen auf ein Lager (4), das im Gehäuse (2) zur Lagerung der Längsbewegung der Bohrkopfspitze (1) vorhanden ist und Abziehen des Lagers (4).A method for maintaining a device for drilling in the ground, in particular a device according to one of claims 1 to 10, the method comprising the step of: providing a housing (2) with a drill head tip (1) which can be moved longitudinally in the housing (2), characterized by a Accessing a bearing (4) which is present in the housing (2) for supporting the longitudinal movement of the drill head tip (1) and pulling off the bearing (4). Verwendung einer Vorrichtung zum Bohren in Erdreich, die ein Gehäuse (2) und eine am Gehäuse (2) angeordnete längsbewegliche Bohrkopfspitze (1) aufweist, dadurch gekennzeichnet, dass ein Lager (4) für die Bohrkopfspitze (1) verwendet wird.Use of a device for drilling in the ground which has a housing (2) and a longitudinally movable drill head tip (1) arranged on the housing (2), characterized in that a bearing (4) is used for the drill head tip (1).
EP20156549.6A 2019-02-11 2020-02-11 Earth boring device, method of manufacturing a device for boring in earth, method of servicing a device for boring in earth and use of a device for boring in earth Active EP3693532B1 (en)

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US20200256126A1 (en) 2020-08-13
PL3693532T3 (en) 2023-03-20
AU2020200965A1 (en) 2020-08-27
DE102019000932A1 (en) 2020-08-13
US11280134B2 (en) 2022-03-22
EP3693532B1 (en) 2023-01-25
AU2020200965B2 (en) 2022-01-27

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