DE102016125032A1 - Suction drilling tool and method for producing a suction drilling - Google Patents

Abstract

The invention relates to a suction drilling tool (1) for creating boreholes in rock, concrete, masonry and the like, comprising a spigot end (2), a working section (3) connected to the spigot end (2) and a boring head connected to the working section (3) (4). In this case, the working section (3) comprises a core (6) integrally formed with the insertion end (4), the working section (3) comprising a tubular jacket (7) connected to the core (6) and between the shell (7). and the core (6) at least one suction channel (21, 22) is formed. ()

Description

The invention relates to a suction drilling tool for creating boreholes in rock, concrete, masonry and the like as well as a method for producing a suction drilling tool according to the preamble of claim 1 or 15.

From the DE 198 10 192 A1 For example, there is known a drainage tool for creating wellbores which includes a spigot end, a working portion connected to the spigot end and a boring head connected to the working portion.

The invention is based on the object, a suction drill, which is manufactured easily manufactured and is insensitive to high impact loads and / or torsional loads and / or bending loads, or to develop a method for producing a Absaugbohrwerkzeugs, in which to dispense with the execution of deep holes can.

This object is achieved on the basis of the features of the preamble of claim 1 and 15 by the characterizing features of claim 1 and 15, respectively. In the dependent claims each advantageous and expedient developments are given.

In the extraction drilling tool according to the invention for creating boreholes, the working section comprises a core integrally formed with the insertion end, the working section comprises a tubular jacket connected to the core and at least one suction channel is formed between the jacket and the core. As a result, the extraction drilling tool is easy to produce in terms of production since it consists of semi-finished products which are readily manufactured or available as a commodity and are assembled. Furthermore, the Absaugbohrwerkzeug is insensitive to shock loads, Torsionsbelastungen and bending loads by the structure of sheath and core. Impact loads can be absorbed and relayed through the core as with conventional impact drills. The coat acts like a core reinforcement. Torsion stresses can also be absorbed and relayed through the core, with the sheath guiding the core and thus stabilizing even under extreme torsional loads as buckling is prevented. Bending loads can also be easily absorbed and forwarded by the combination in front of the core and sheath since, in particular, the sheath supported by the core is fundamentally well suited for absorbing bending forces due to its geometric shape.

It is further contemplated that the sheath of the Absaugbohrwerkzeugs by its shape and / or by its outer diameter in such a way deviates from the well bore produced by the drill head of Absaugbohrwerkzeugs that between a borehole wall and an outer surface of the shell, an outer supply air channel is formed. As a result, a basic supply of the drill head is ensured with supply air and the occurrence of increased friction, especially in deep wells reliably avoided.

It is provided to form at least one inner supply air duct between the casing and the core, it being provided in particular that the casing has at least one inlet in an insertion-side end region which leads into the inner supply air duct. By forming at least one inner supply air duct, it is possible to provide the drill head with consistently good guidance in the borehole over a larger cross section and thus per unit time with a larger volume of supply air. By forming an inlet leading into the inner supply air duct, it is possible to supply the supply air duct in areas of the core with supply air from the environment, which are sheathed by the jacket.

It is also envisaged that the at least one suction channel opens at a drill head end region of the tubular jacket toward the drill head and that the at least one suction channel extends to at least one end portion of the tubular jacket on the rotary feedthrough side and / or the at least one suction channel passes through a radially arranged in the jacket outlet opens, wherein it is provided in particular that the suction channel is longer than the supply air duct. Such an embodiment of the at least one suction channel makes it possible to transport drilling dust out of the borehole through the suction channel away from the boring head and to remove it parallel to the longitudinal axis of the suction boring tool or radially to the longitudinal axis of the suction boring tool under the jacket.

Furthermore, it is provided that the drill head comprises at least one cutting element with at least one cutting edge, wherein the cutting element in particular comprises one or more cutting bodies, which e.g. are designed as a plate or dome or wedge, and wherein it is provided in particular that the drill head is at least partially formed from a hard material or a hard metal. Such drill heads can provide high cutting and / or smashing performance, so that they can provide their maximum performance in conjunction with a powerful extraction system.

It is also provided that the suction drilling tool comprises a rotary feedthrough, which is arranged adjacent to the insertion on the working portion, wherein the rotary feedthrough comprises a receiving space or a suction chamber, wherein the at least one suction channel opens into the receiving space and in particular provided is that the rotary feedthrough comprises a suction opening, through which the receiving space is sucked, wherein it is provided in particular that the suction opening is aligned with its longitudinal axis approximately radially to a longitudinal axis of the suction drilling. In cooperation with a rotary feedthrough, in the receiving space of the at least one suction channel opens, an effective and easy further promotion of enriched with Bohrstaub exhaust air is achieved.

With respect to the tubular jacket which surrounds the core, it is provided that this is formed from a metallic material or from a particular fabric-containing composite material or from a particular multilayer plastic or from a hard material. By appropriately trained coats the suction drill can be optimally adapted both to special loads, as these occur, for example, in particular long Absaugbohrwerkzeugen with lengths of about 30 cm. Furthermore, the weight of the suction drilling tool can also be influenced to a considerable extent, in particular with large bore diameters of more than 20 cm, so that the workload can be reduced, e.g. Can be reduced with suction drilling tools for overhead use.

It is also envisaged that the tubular jacket has a slot extending from its rotary feedthrough-side end region to its drill head-side end region, wherein it is provided in particular that the slot is designed as a straight slot or longitudinal slot or as a helically extending slot or helical slot and it is provided in particular that the jacket towards its longitudinal edges, which are located opposite to the slot, is deformed towards its longitudinal axis and in particular folded and / or that longitudinal edges of the jacket, which are opposite to the slot, in the mounted state of the jacket are connected to each other. Through such a slot alignment of the core and shell is simplified during assembly, since this can be done with slightly bent coat without or with less friction. Furthermore, the slot allows it, if provided, to deform the shell with lower forces or build in a deformation less stress in the shell than is the case with an annularly closed shell.

If a rotary feed-through side end region of the tubular jacket is positioned between the core and the rotary feedthrough, that the at least one suction channel opens into the receiving space of the rotary feedthrough, no additional processing of the jacket is required with respect to the suction channel and further ensured that the drilling dust in any case is conveyed to the receiving space and can not escape even in the case of technical problems in front of the recording room.

It is also contemplated that the core comprises at least one helically extending over the region of the tubular shell about a longitudinal axis of Absaugbohrwerkzeugs spiral and forms a spiral shaft, wherein a helical groove of the helix is covered by the tubular jacket and forms the at least one suction channel. In such an embodiment, the spiral grooves can be used in a corresponding adjustment of the shell or a corresponding adjustment of a length of the respective helical groove according to the requirements as Zuluftkanäle or as exhaust ducts. Furthermore, it is even possible to use conventional drilling tools as cores for extraction tools according to the invention when using adapted in their effective diameter drill heads.

Furthermore, it is also provided that the core comprises at least one extending over the region of the tubular shell parallel to a longitudinal axis of Absaugbohrwerkzeugs longitudinal groove and forms a profile shaft, wherein the longitudinal groove is covered by the tubular shell and forms the at least one suction channel. In such an embodiment, the longitudinal grooves can be used in a corresponding adjustment of the shell according to the requirements as Zuluftkanäle or as exhaust ducts. Pressing the jacket into at least one of the longitudinal grooves to increase the volume of supply air flowing per unit time to the drill head can be produced particularly easily in terms of production since the jacket only has to be reshaped in a line-shaped and, in particular, linearly extending region.

Furthermore, it is provided that the tubular jacket is non-displaceably connected in the direction of a longitudinal axis of Absaugbohrwerkzeugs and against rotation about the longitudinal axis of Absaugbohrwerkzeugs with the core and in particular is connected such that the core and the shell are glued and / or soldered and / or are welded and / or are connected by a press fit or that the tubular jacket is non-displaceably connected in the direction of a longitudinal axis of Absaugbohrwerkzeugs with the core and rotatably mounted about the longitudinal axis of the Absaugbohrwerkzeugs to the core and is stored in particular such that the jacket is mounted between the drill head and a rotary feedthrough of Absaugbohrwerkzeugs. Reliable movements between the core and the jacket are completely prevented by a displacement-proof and torsion-proof connection of the jacket to the core, so that a heat development caused thereby under the jacket is prevented. By an exclusively secure displacement of the sheath on the core, a rotation of the core in the shell about the longitudinal axis of the drilling tool is possible. If this lower frictional forces than by the friction of an outer circumferential surface of the shell on the borehole wall, can be reduced by such a construction, the power required for drilling. Such a construction is particularly advantageous for large drilling depths, since considerable frictional forces arise here even with a slight misalignment of the suction drilling tool between the borehole wall of the borehole and the jacket of the suction drilling tool.

It is also envisaged that the shaft comprises either at least two longitudinal grooves or at least two helical grooves, such that the tubular jacket extends from the drill head in the direction of the insertion end over a length which is greater than a maximum allowable drill hole depth with the suction drilling tool, into at least one and at most all but one of the longitudinal grooves or the helical grooves is pressed that between an imaginary cylinder circumference of the shell and formed by the impressions in the longitudinal groove on an outer circumferential surface of the shell longitudinal groove or formed by the impressions in the helical groove on an outer circumferential surface of the shell spiral groove at least one Außenmantelnut is formed, which forms or increases the supply air duct, wherein the longitudinal groove or the spiral groove is in particular designed such that the jacket with its inner circumferential surface partially or completely on a surface of the longitudinal groove or on a he surface of the helical groove rests. This makes it possible to easily increase the cross section for the supply air flowing to the drill head and thus the outer supply air duct, without the stability of Absaugbohrwerkzeugs is reduced and without a guaranteed by the jacket side guide of Absaugbohrwerkzeugs is deteriorated.

Furthermore, it is provided that the shaft either comprises at least one longitudinal groove or at least one helical groove, that the tubular casing from the drill head in the direction of the insertion over a length which is greater than a maximum allowable hole depth with the Absaugbohrwerkzeug over its entire length is pressed into one of the longitudinal grooves or in one of the helical grooves, that between an imaginary circumferential cylinder of the shell and a longitudinal groove formed by the impressions in the longitudinal groove on an outer circumferential surface of the shell or by pressing into the spiral groove on an outer surface of the shell spiral groove Außenmantelnut is formed, which forms or increases the supply air duct, and that between the longitudinal groove and the shell or between the helical groove and the shell a circumferentially closed cross-section reduced inner jacket channel is maintained, which forms the at least one suction channel et. This makes it possible to use each Längsnut or Wendelnut a Absaugbohrwerkzeugs despite a magnification of a cross section of the outer Zuluftkanals as Absaugkanl so that each cutting edge of the drill head is associated with a suction and the drill dust can be particularly effectively sucked at the point of origin.

It is envisaged that the shaft comprises four longitudinal grooves or helical grooves distributed in particular uniformly around its circumference, wherein the sheath is pressed into a first pair of opposing longitudinal grooves or helical grooves and wherein the sheath covers a second pair of opposite longitudinal grooves or helical grooves undeformed. In this way, a suction drilling tool is formed in which a flow cross section available for the supply air corresponds approximately to a flow cross section available for the exhaust air, so that a stowage effect in the air flow is reliably avoided.

The method according to the invention for producing a suction drilling tool comprises the steps of producing a one-piece core which comprises at least one insertion end and a shaft, wherein the shaft is designed as a helical shaft with at least one helical groove or as a profiled shaft with at least one longitudinal groove, applying a sheath to the shaft the core to forming a working section. With such a manufacturing method, an assembly can be produced in a very simple manner from components that are simple to manufacture from a production point, which can be completed by a rotary feedthrough to a suction drilling tool and where at least one suction channel running parallel to a longitudinal axis of the suction drilling tool is produced by simply merging the core and the jacket. without the need for elaborate and costly deep hole drilling must be performed.

In a further step of the method, the application of a rotary feedthrough is provided on the working section before or after the application of the jacket, wherein the rotary feedthrough is applied such that a rotary feed-through side end portion of the shell adjacent to the rotary feedthrough or is overlapped by the rotary feedthrough. This will be without additional Components ensure that the suction channel ends in the rotary feedthrough.

In a further step, the fastening of a drill head is provided, which optionally takes place in particular such that the drill head is connected to the core either before the application of the shell during or after the production of the core or after application of the shell is connected to the core or after application of the jacket to the core and to the jacket. In this way, suction drilling tools with very different dimensions can be realized with regard to the diameter of their individual parts.

The method also provides for a connection of sheath and core and / or sheath and drill head, which takes place in such a way that the sheath is securely connected in the direction of a longitudinal axis of the suction drilling tool to the core and / or the drill head or that the sheath is secure against displacement in the direction of a Longitudinal axis of Absaugbohrwerkzeugs and against rotation about the longitudinal axis of Absaugbohrwerkzeugs is connected to the core and / or the drill head, wherein the compound is in particular form-fitting and / or non-positively formed. By such steps, the suction drill can be optimally adapted to different requirements such as low friction between the core and the jacket or low braking effect by a concern of the shell on a borehole wall.

Finally, the method provides that the shaft, which is formed as a helical shaft or as a profile shaft, at least one helical groove or at least one longitudinal groove and that the jacket of the drill head, starting in the direction of the insertion over a length which is greater than one with the Absaugbohrwerkzeug maximum allowable hole depth is pressed to form at least one Außenmantelnut in at least one of the helical grooves or in at least one of the longitudinal grooves in the direction of a longitudinal axis of Absaugbohrwerkzeugs. This process can be performed manufacturing technology with simple and inexpensive machines.

Further details of the invention are described in the drawing with reference to schematically illustrated embodiments.

• 1: eine perspektivische Ansicht einer ersten Ausführungsvariante eines erfindungsgemäßen Absaugbohrwerkzeugs;
• 2: eine aufgeschnittene Detaildarstellung des in der 1 gezeigten Absaugbohrwerkzeugs aus der in der 1 gezeigten Pfeilrichtung II;
• 3: eine Ansicht des in der 1 gezeigten Absaugbohrwerkzeugs aus der in der 1 gezeigten Pfeilrichtung III;
• 4: einen Schnitt durch das in der 1 gezeigte Absaugbohrwerkzeug entsprechend der in der 1 gezeigten Schnittlinie IV-IV;
• 5: eine Detailansicht einer Bohrerspitze des in der 1 gezeigten Absaugbohrwerkzeugs mit Wendelnuten;
• 6: einen Kern des in der 1 gezeigten Absaugbohrwerkzeugs mit Wendelnuten in Alleinstellung;
• 7: einen Mantel des in der 1 gezeigten Absaugbohrwerkzeugs in Alleinstellung, wobei mit gestrichelten Linien zwei Bauvarianten des Mantels angedeutet sind;
• 8: den Mantel und den Kern des in der 1 gezeigten Absaugbohrwerkzeugs, wobei der Mantel vollständig auf dem Kern montiert ist;
• 9: eine perspektivische Ansicht einer zweiten Ausführungsvariante eines erfindungsgemäßen Absaugbohrwerkzeugs mit Längsnuten;
• 10a, 10b: Detailansichten des Absaugbohrwerkzeugs im Bereich einer Drehdurchführung;
• 11: eine Ansicht des in der 9 gezeigten Absaugbohrwerkzeugs aus der in der 9 gezeigten Pfeilrichtung XI;
• 12: eine Aufsicht auf das in der 9 gezeigte Absaugbohrwerkzeug entsprechend der in der 9 gezeigten Pfeilrichtung XII;
• 13: eine Detailansicht einer Bohrerspitze des in der 9 gezeigten Absaugbohrwerkzeugs;
• 14: eine aufgeschnittene Darstellung des in der 9 gezeigten Absaugbohrwerkzeugs im Bereich der Drehdurchführung in einer ersten Drehstellung von Kern und Mantel;
• 15: eine aufgeschnittene Darstellung des in der 9 gezeigten Absaugbohrwerkzeugs im Bereich der Drehdurchführung in einer zweiten Drehstellung von Kern und Mantel;
• 16: eine Explosionsdarstellung von Mantel und Kern des in der 9 gezeigten Absaugbohrwerkzeugs in perspektivischer Ansicht;
• 17a - 17c: eine Seitenansicht, eine Ansicht von oben und eine Ansicht von unten einer dritten Ausführungsvariante eines erfindungsgemäßen Absaugbohrwerkzeugs;
• 18 - 24: jeweils eine Kopfansicht einer vierten bis zehnten Ausführungsvariante eines erfindungsgemäßen Absaugbohrwerkzeugs und
• 25 - 32: jeweils eine Kopfansicht einer elften bis fünfzehnten Ausführungsvariante eines erfindungsgemäßen Absaugbohrwerkzeugs in schematischen Schnitten.

Hereby shows:

• 1 a perspective view of a first embodiment of a suction drill according to the invention;
• 2 : a cutaway detail of the in the 1 Absaugbohrwerkzeugs shown in the 1 shown arrow direction II;
• 3 : a view of the in the 1 Absaugbohrwerkzeugs shown in the 1 shown arrow direction III;
• 4 : a cut through that in the 1 shown suction drill according to the in the 1 shown section line IV-IV;
• 5 : a detail view of a drill bit in the 1 shown suction drill with spiral grooves;
• 6 : a nucleus of in the 1 shown Absaugbohrwerkzeugs with helical grooves in isolation;
• 7 : a coat of the in the 1 shown suction drilling tool alone, with two variants of the jacket are indicated by dashed lines;
• 8th : the coat and the core of the in the 1 shown Absaugbohrwerkzeugs, wherein the jacket is completely mounted on the core;
• 9 a perspective view of a second embodiment of a suction drill according to the invention with longitudinal grooves;
• 10a . 10b : Detailed views of the suction drilling tool in the area of a rotary union;
• 11 : a view of the in the 9 Absaugbohrwerkzeugs shown in the 9 shown arrow XI;
• 12 : a top view of that in the 9 shown suction drill according to the in the 9 shown arrow XII;
• 13 : a detail view of a drill bit in the 9 shown suction drill;
• 14 : a cutaway view of the in the 9 Suction drilling tool shown in the field of rotary feedthrough in a first rotational position of the core and shell;
• 15 : a cutaway view of the in the 9 Suction drilling tool shown in the field of rotary feedthrough in a second rotational position of the core and shell;
• 16 : an exploded view of the mantle and core of the 9 shown suction drilling in perspective view;
• 17a - 17c a side view, a view from above and a bottom view of a third embodiment of a suction drill according to the invention;
• 18 - 24 in each case a head view of a fourth to tenth embodiment variant of a suction drill according to the invention and
• 25 - 32 in each case a head view of an eleventh to fifteenth embodiment variant of a suction drilling tool according to the invention in schematic sections.

In the 1 is a perspective view of a first embodiment of a suction drill according to the invention 1 shown. The 2 to 8th show further illustrations of this suction drill 1 , The suction drill tool 1 includes a spigot 2 and one with the insertion end 2 connected work section 3 and one with the working section 3 connected drill head 4 , Furthermore, the suction drill includes 1 a rotary union 5 ,

The working section 3 includes a core 6 , which with the insertion end 2 is integrally formed in the manner of a conventional one-piece drilling tool (see in particular 6 ). The core 6 is in the 6 in isolation in a room in relation to the representation of the 1 and a longitudinal axis L1 the suction drill 1 shown rotated by 180 ° orientation.

Next to the core 6 includes the working section 3 also a tubular jacket 7 , The coat 7 is in the 7 in isolation in a room in relation to the representation of the 1 and the longitudinal axis L1 the suction drill 1 shown rotated by 180 ° orientation. In a rear, the rotary union 5 near, rotary feedthrough end portion 7b, which a drill head end portion 7a opposite, the jacket shows 7 radially an inlet 8th for supply air ZL on. Opposite the inlet 8th shows the coat 7 one in the 1 not directly visible second inlet 9 for supply air ZL on. However, this is in the sectional view of 4 visible, noticeable. The operation of the suction drill 1 in the inlets 8th and 9 inflowing supply air ZL is in the 6 through in the flow direction of the supply air ZL pointing arrows symbolizes. The coat 7 includes an outer circumferential surface AMF7 and an inner circumferential surface IMF7 , At the rotary passage side end portion 7b of the coat 7 has its outer circumferential surface AMF7 one the coat 7 circumferential surface portion OAS7, which is prepared with respect to its surface texture for the assembly of the rotary feedthrough 5.

The drill head 4 includes a cutting element 10 with four blades 10a, 10b, 10c and 10d. The cutting element 10 is thus formed as a four-cutter, which two formed as plates, intersecting cutting body 11 . 12 includes.

From the 6 it can be seen that at the core 6 a helix 13 is formed, which between four spirally encircling webs 13a, 13b, 13c, 13d formed helical grooves 14a, 14b, 14c and 14d comprises. The core 6 thus forms a wave 15 , which as a helical wave 16 is trained. The four helical grooves 14a to 14d lead to the drill head 4 out between the intersecting cutting bodies 11 . 12 ,

In the 8th is shown as the core 6 and the coat 7 for the formation of the working section 3 pushed together. This is the coat 7 from the insertion end 2 forth to the core 6 deferred or pressed until the coat 7 in terms of the core 6 in his in the 8th shown position stands. In the assembled state then lies the coat 7 with its inner surface IMF7 on shoulders S13a, S13b, S13c and S13d of the ridges 13a to 13d of the core 6 on (compare 6 to 8th ). To the coat 7 rotatably about the longitudinal axis L1 of Absaugbohrwerkzeugs 1 and secure against displacement in the direction of the longitudinal axis L1 the suction drill 1 on the core 6 to hold on are the core 6 and the coat 7 glued together leaving the helical grooves 14a to 14d. This is the coat 7 when sticking to the core 6 such on the helical grooves 14a to 14d of the helix 13 of the core 6 aligned that the first inlet 8th in the helical groove 14a and the second inlet 9 in the opposite helical groove 14c opens (see in particular also 2 and 4 ). This allows the supply air ZL during operation of the suction drilling tool 1 in the helices 14a and 14c to the drill head 4 stream. The through the coat 7 Covered helical grooves 14a and 14c thus form, in addition to a ring-like in cross-section, outer supply air duct 17 , which - like from the 4 apparent - between a borehole wall 901 one in a masonry 902 executed borehole 903 is formed, a second, inner supply air duct 18 and a third, inner supply air duct 19. This shows the 4 a section IV-IV through the in the 1 illustrated suction drill 1 , where the section IV-IV in the area of the inlet 8th transverse to the longitudinal axis L1 is executed. The masonry shown schematically for explanation 902 Of course, before the Schnittbne namely between the Schnittse IV-IV and the drill head 4 ,

In the cutaway detail of the 2 which in the 1 illustrated suction drill 1 from the in the 1 indicated arrow direction II, it can be seen as the helical groove 14a and the supply air duct 18 through the first inlet 8th in an environment U opens so that supply air is released into the supply air duct 18 can flow in. In the presentation of the 2 are the working section 3 and the rotary union 5 each cut open to a quarter. Corresponding is also recognizable that extending in addition to the helical groove 14a helical groove 14b in a receiving space 20 the rotary union 5 opens, as the coat 7 to the recording room 20 ends. Thus, the helical groove 14b is in the accommodating space 20 opened in the radial direction. For clarification, the helical groove 14b is referred to twice, namely both where this under the coat 7 runs as well as where these in the recording room 20 ends.

The helical groove 14b and the opposite helical groove 14d (see also 4 and 6 ) form together with the coat 7 , which covers these, a first suction channel 21 and a second suction channel 22 , Through the suction channels 21 and 22 flows with an activated suction device 911 which in the 1 symbolically represented, depending on a Bohraktivität either pure exhaust air AL or with debris and / or Bohrstaub enriched Runoff AL (see also 2 ). The suction device 911 is by means of an adapter 912 to one as a connecting piece 23 trained suction opening 24 the rotary union 5 connected. A longitudinal axis L24 the suction opening 24 is radial to the longitudinal axis L1 the suction drill 1 aligned.

The rotary feedthrough 5 includes a drill head side bearing 25 , a plug-in bearing camp 26 as well as a housing 28 , The two camps 25 . 26 are designed as plain bearings or as ball bearings and in the 2 shown only symbolically. The drill head side, front bearing 25 sits on the rotary feedthrough end 7b of the coat 7 and the rear bearing 26 sits on a helix-free area 6b of the core 6 , Through the two camps 25 . 26 is the working section 3 opposite the housing 28 the rotary feedthrough and the molded on the housing connection piece 23 freely rotatable.

According to a variant indicated by a dashed line TR7.1, the jacket ends 7 already at the front bearing 25 , With such a design, the helical grooves 14b and 14d are then up to the receiving space 20 through the front bearing 25 covered, which then directly on the as a spiral shaft 16 trained section of the core 6 sitting. As a result, the helical grooves 14b and 14d also form in the region of the front bearing 25 still circumferentially closed suction channels 21 . 22 ,

According to a further embodiment variant, it is also provided that the jacket 7 - As further dashed lines show - up in the recording room 20 (see TR7.2) or to the rear bearing 26 (see TR7.3) or below the rear bearing 26 (see TR7.4) or beyond the rear bearing 26 (see TR7.5) out towards the male end 2 is extended. In such designs, the jacket 7 then analogous to the inlets 8th and 9 also outlets, which in the area of the recording room 20 are arranged and are aligned on the helical grooves 14b and 14d such that the exhaust air from the helical grooves 14b and 14d through these outlets into the receiving space 20 can flow out. When extending to below the rear bearing 26 or over the rear bearing 26 The second camp also sits outside 26 then completely or partially on the coat 7 , If both camps 25 . 26 on the coat 7 it is possible to have identical bearings 25 . 26 to use.

In terms of in the 1 to 8th shown first embodiment of the Absaugbohrwerkzeugs 1 is in the 1 according to the arrows shown with dashed lines P14a and P14B indicated schematically as under the coat 7 supply air ZL in the direction of the drill head 4 flows and exhaust air AL in the direction of the rotary union 5 flows. This supply air flow ZL and exhaust air AL under the coat 7 in the helical grooves 14a, 14b separated from each other and spirally circulating. In the other helical grooves 14c and 14d supply air and exhaust air flow in a comparable manner.

Furthermore, it follows from a synopsis of 1 . 2 and 3 that the suction channels 21 . 22 both in terms of one in the direction of the longitudinal axis L1 the suction drill 1 measured length, as well as in relation to a resulting from the spiral course effective length are longer than those under the mantle 7 extending supply air ducts 18 . 19 ,

In view of the above-mentioned and indicated by the lines TR7.4 and TR7.5 variants, it is also provided, the helical shaft 16 until under the rear bearing 26 or over the rear bearing 26 out at the core 6 train. This is where the suction channels run 21 . 22 then in the area of the recording room 20 out and flow through accordingly in the mantle 7 attached outlets into the reception room 20 , The supply air ducts 18 . 19 then run until at least under the rear bearing 26 and are then either open in the axial direction or are then through radially in the jacket 7 arranged inlets open.

In the 3 is a view of the in the 1 shown suction drill 1 from the in the 1 indicated arrow direction III. In this representation, in analogy to the representation of 4 again a section of the masonry 902 shown with dashed lines, in which through the drill head 4 the suction drill 1 the borehole 903 is made. From this view, it can be seen that an outer diameter D7 of the coat 7 smaller than an effective diameter WD1 the suction drill 1 is. In the in the 1 to 8th embodiment shown is an effective diameter WD1 the suction drill 1 about 10% larger than an outside diameter D7 of the coat 7 , In principle, it is provided that the effective diameter is formed in such Absaugbohrwerkzeugen 5% to 15% larger than the outer diameter of the shell. An inner diameter d7 of the coat 7 and an outer diameter D6 of the core 6 in the area of the helical shaft 16 are so coordinated that the core 6 with its helical shaft 16 in a cavity 27 of the coat 7 can be inserted or pressed, so that they are possibly connected together using an adhesive rotationally and non-displaceably. The outer diameter D6 of the core 6 is at least 50% and is preferably at least 70% of the effective diameter WD1 the suction drill 1 ,

In the 9 is a perspective view of a second embodiment of a suction drill according to the invention 101 shown. The 10a to 16 show further illustrations of this suction drill 101 , The suction drill tool 101 includes a spigot 102 and one with the insertion end 102 connected working section 103 and one with the working section 103 connected drill head 104 , Furthermore, the suction drill includes 101 a rotary union 105 ,

The working section 103 includes a core 106 , which with the insertion end 102 is integrally formed in the manner of a conventional one-piece drilling tool (see in particular 16 ). The suction drill tool 101 extends in the direction of its longitudinal axis L101 ,

Next to the core 106 includes the working section 103 also a tubular jacket 107 , The coat 107 is in the 16 shown alone in a withdrawn from the core position. In a rear, the rotary union 105 near, rotary feedthrough end 107b , which is a drill head end area 107a opposite, the jacket shows 107 radially an inlet 108 for supply air ZL on. As seen from the sectional view of 10a which shows a longitudinal section through the Absaugbohrwerkzeug 101 in the area of the rotary feedthrough 105 shows, the coat shows 107 opposite the inlet 108 a second inlet 109 for supply air ZL on. The operation of the suction drill 101 in the inlets 108 and 109 inflowing supply air ZL is in the 10b through in the flow direction of the supply air ZL pointing arrows symbolizes. The coat 107 includes an outer circumferential surface AMF107 and an inner circumferential surface IMF107 (please refer 16 ). At the rotary passage side end portion 107b of the coat 107 has its outer circumferential surface AMF107 one the coat 107 circumferential surface section OAS107, which in terms of its surface finish for the assembly of the rotary feedthrough 105 is prepared.

The drill head 104 includes a cutting element 110 with four cutting edges 110a, 110b, 110c and 110d. The cutting element 110 is thus formed as a four-cutter, which two formed as plates, intersecting cutting body 111 . 112 includes.

From the 16 and one in the 11 shown section according to the in the 9 drawn section line XI-XI, and one in the 12 shown top view of the drill head 104 in the direction of the arrow XII (see 9 ) it can be seen that at the core 106 a profile 113 is formed, which between four parallel to the longitudinal axis L101 the suction drill 101 extending ridges 113a, 113b, 113c, 113d formed longitudinal grooves 114a, 114b, 114c and 114d. The core 106 thus forms a wave 115 , which as profile wave 116 is trained. The four longitudinal grooves 114a to 114d lead to the drill head 104 out between the intersecting cutting bodies 111 . 112 ,

To form the working section 3 become the core 106 and the coat 107 which in the 16 shown as individual parts, put together. In the assembled state covers - such as in the 9 . 11 and 12 shown - the coat 107 the longitudinal grooves 114a to 114d of the profile 113 of the core 106 from. When mating is the coat 107 from the insertion end 102 forth on the core 106 slid or pressed on (see 16 ) until the coat 107 in terms of the core 106 in his eg in the 9 shown position in which this to the drill head 104 adjoins, stands. In the assembled state then lies the coat 107 with its inner surface IMF7 on shoulders S113a, S113b, S113c and S113d of the ridges 113a to 113d of the core 106 on (compare 9 . 11 . 12 ).

In the 16 is the coat 107 already with two beads in the form of longitudinal channels 151 and 152 shown, which differs from the inlet 108 respectively. 109 in the direction of the drill head end area 107a of the coat 107 to a front end 107c of the coat 107 extend (see also 12 ). Unless the coat 107 about the insertion end 102 of the core 106 on the core 106 is postponed, these longitudinal channels 151 . 152 first in the coat 107 molded when this on the core 106 is deferred.

If the drill head 104 not yet with the core 106 is connected, it may also be provided, the coat 107 with already molded longitudinal grooves 151 . 152 like that with the core 106 to connect that to the core 106 from the rotary passage side end portion 107b of the coat 107 in the coat 107 is inserted.

The coat 107 is rotationally fixed about the longitudinal axis L101 the suction drill 101 and secure against displacement in the direction of the longitudinal axis L101 the suction drill 101 on the core 106 held, as the longitudinal troughs 151 . 152 are formed in the longitudinal grooves 114d and 114b, and since the longitudinal grooves 151 . 152 in the direction of the longitudinal axis L101 the suction drill 101 between the drill head 104 and ends E114d respectively. E114b the longitudinal grooves 114d and 114b are held. This is especially true of the 9 . 10a . 10b and 13 seen. Optionally, it is also provided, the core 106 and the coat 107 while maintaining the longitudinal grooves 114a to 114d in addition to stick together to relative movements between the jacket 107 and the core 106 to prevent. The coat 107 is with its inlets 108 . 109 so on the core 106 aligned so that they open into the longitudinal grooves 114d and 114b (see in particular 11 ). This allows the supply air ZL during operation of the suction drilling tool 101 to flow into the longitudinal grooves 114b and 114d. The through the coat 107 Covered helical grooves 114b and 114d thus form, in addition to a ring-like in cross-section, outer supply air duct 117 , which - like from the 12 apparent - between a borehole wall 901 one in a masonry 902 executed borehole 903 is formed, a second, inner supply air duct 118 and a third, inner supply air duct 119 , The external supply air duct 117 is in the region of the longitudinal grooves 151, 152 continue by their cross sections Q151 and Q152 increased.

In the cutaway detail of the 14 which in the 9 illustrated suction drill 101 from the in the 9 indicated arrow direction XIV about 45 ° clockwise about the longitudinal axis L101 rotated, it can be seen as the longitudinal groove 114d and the supply air duct 118 through the first inlet 108 and how the longitudinal groove 114b or the supply air duct 119 through the second inlet 109 in an environment U opens so that supply air is released into the supply ducts 118 . 119 inflow and through them in the direction of the arrow P114a to the drill head 104 can flow. In the presentation of the 14 are the working section 103 and the rotary union 105 each half shown cut open, with the core 106 not hatched for the sake of clarity.

Accordingly, in the in the 15 shown sectional view in which the suction drill 101 opposite in the 15 shown rotational position by 90 ° counterclockwise about the longitudinal axis L101 rotated, it can be seen that the longitudinal grooves 114a and 114c extending between the longitudinal grooves 114d and 114b are longer and extend into a receiving space 220 the rotary feedthrough 105 run. Since the coat 107 at the recording room 120 ends, the longitudinal grooves 114a, which opens a first suction channel 121 forms, and the longitudinal groove 114c, which a second suction channel 122 forms, in the reception room 120 ,

The longitudinal groove 114a and the longitudinal groove 114b opposite thereto form together with the jacket 107 , which covers these, the first suction channel 121 and the second suction channel 122 , Through the suction channels 121 and 122 flows in the direction of the arrow P114b at an activated suction device 911 which in the 9 symbolically represented, depending on a Bohraktivität either pure exhaust air AL or exhaust air enriched with drilling dust and / or drilling dust AL , The suction device 911 is by means of an adapter 912 to one as a connecting piece 123 trained suction opening 124 the rotary union 105 connected. A longitudinal axis L124 the suction opening 124 is radial to the longitudinal axis L101 the suction drill 101 aligned.

The rotary feedthrough 105 includes a drill bit side bearing 125, a male end bearing 126 as well as a housing 128 (see in particular 10b . 14 . 15 ). The two bearings 125, 126 are formed as plain bearings or as ball bearings and shown only symbolically in the drawings. The drill head side, front bearing 125 sits on the rotary feedthrough end 107b of the coat 107 and the rear bearing 126 sits on a longitudinally groove-free portion 106b of the core 106 ,

In the plan view of 10a stand the working section 103 and the rotary feedthrough 105 so to each other that both the inlet 109 and in this opening longitudinal groove 114b and in the receiving space 120 opening longitudinal groove 114a can be seen. In this view is thus also a difference in length LU between the supply air duct 118 and the suction channel 121 recognizable, this being greater than a width B125 of the front bearing 125 is.

According to one in the 10b with a line TR107.1 indicated variant of the jacket ends 107 already at the front bearing 125 , In such a design, the longitudinal grooves 114b and 114d are then up to the receiving space 120 through the front bearing 125 covered, which then directly on the profile shaft 116 trained portion of the core 6 sits. As a result, the longitudinal grooves 114b and 114d also form in the region of the front bearing 125 still circumferentially closed suction channels 121 . 122 ,

According to a further embodiment variant, it is also provided that the jacket 107 - As more lines show - up in the recording room 120 (see TR107.2) or to the rear bearing 126 (see TR107.3) or below the rear bearing 126 (see TR107.4) or beyond the rear bearing 126 (see TR107.5) is extended in the direction of the insertion end. In such designs, the jacket 107 then analogous to the inlets 108 and 109 further inlets, which in the area of the recording room 120 are arranged and aligned on the longitudinal grooves 114b and 114d such that the exhaust air from the longitudinal grooves 114b and 114d in the receiving space 120 can flow out. When extending to below the rear bearing 126 or beyond the rear bearing 126, the second bearing sits 126 then completely or partially on the coat 107 , If both camps 125 . 126 on the coat 107 sitting, it is possible to use identical bearings.

In terms of in the 9 to 16 shown second embodiment of the suction drill 101 is in the 9 by the arrows shown with dashed lines P114a and P114b indicated schematically as under the coat 107 Supply air in the direction of the drill head 104 flows and exhaust air in the direction of the rotary feedthrough 105 flows. Supply air and exhaust air flow under the jacket 7 in the longitudinal grooves 114a to 114d separated from each other and parallel to the longitudinal axis L101 the suction drill 101 ,

Furthermore, it follows from a synopsis of 9 and 16 that the suction channels 121 . 122 with respect to one in the direction of the longitudinal axis L101 the suction drill 101 measured length are longer than those under the coat 107 extending supply air ducts 118 . 119 ,

In view of the above-mentioned and indicated by the lines TR107.4 and TR107.5 variants, it is also provided, the profile shaft 116 until under the rear bearing 126 or over the rear bearing 126 out at the core 106 train. This is where the suction channels run 121 . 122 then in the area of the recording room 120 out and flow through accordingly in the mantle 107 attached outlets into the reception room 120 , The supply air ducts 118 . 119 then run until at least under the rear bearing 126 and are either open in the axial direction or are opened by radially in the shell 107 arranged inlets.

In the 12 is a view of the in the 9 shown suction drill 101 from the in the 9 indicated arrow XII. In this illustration is - as already mentioned - a section of the masonry 902 shown with dashed lines, in which through the drill head 104 the suction drill 101 the borehole 903 is made. From this view, it can be seen that an outer diameter D107 of the coat 107 smaller than an effective diameter WD101 the suction drill 101 is. In the in the 9 to 16 shown second embodiment is an effective diameter WD101 the suction drill 101 about 10% larger than the outside diameter D107 of the coat 107 , In principle, it is provided that the effective diameter of such suction drilling tools 5% to 15% larger than the outer diameter D107 of the coat 107 is trained. An inner diameter d107 of the coat 107 and an outer diameter D106 of the core 106 in the area of its profile wave 116 are so coordinated that the core 106 with his profile shaft 116 in a cavity 127 of the coat 107 (please refer 16 ) can be inserted or pressed in, so that they are optionally connected to one another in an anti-rotational and non-displaceable manner using an adhesive. The outer diameter D106 of the core 106 is at least 50% and is preferably at least 70% of the effective diameter WD101 of Absaugbohrwerkzeugs 101 , The in the coat 107 molded longitudinal channels 151 and 152 form Außenmantelnuten 153, 154 through which additional supply air between the borehole wall 901 and the coat 107 the Absaugbohrwerkzeugs 101 to the drill head 104 can flow.

If the core 106 the suction drill 101 is dimensioned such that a diameter D102 the insertion end 102 is less than or equal to a diameter D115 the wave 115 is, the coat can 107 during assembly from the insertion end 102 forth to the core 106 be deferred to one from the core 106 and the coat 107 existing body 129 to form (see 16 ). In such a mounting of the jacket 107 is also possible that the drill head 104 already with the core 106 connected is.

If according to an embodiment not shown, the core of Absaugbohrwerkzeugs is dimensioned such that a diameter of the spigot is greater than a diameter of the shaft, the jacket can be pushed during assembly only from the insertion end opposite end to the core to one from To form the core and the shell existing body. In such a mounting of the shell of the drill head is connected to the core after the connection of the core and shell. Alternatively, it is also provided, the jacket - as described for the first embodiment - split by a slot and then applied either in the axial direction as a sleeve or in the radial direction as a clasp on the core. In this case, it is provided that the jacket is then molded onto the core in particular in such a way is that the slot is after molding in a longitudinal groove.

In a sub-variant of the second embodiment, not shown, it is provided that the shaft is not formed as a profile shaft, but as a helical shaft and that the jacket is formed in at least one helical groove of the helical shaft, so that at least one spirally extending bead or helical groove is formed.

In the 17a to 17c are a side view, a top view and a bottom view of a third embodiment of a suction drill according to the invention 201 shown schematically. The suction drill tool 201 includes only one inner supply air channel 218, through which a between a borehole wall 901 one in the 17b indicated borehole 903 and a coat 207 the suction drill 201 outer supply air channel 217 is increased in its cross section. The inner supply air channel 218 is under the jacket 207 in one in a core 206 the Absaugbohrwerkzeugs executed longitudinal groove 214a trained and runs from a drill head 204 up to an inlet 208 parallel to a longitudinal axis L201 the suction drill 201 , Between a second longitudinal groove 214b which are at the core 206 is formed, and the coat 207 is a suction channel 221 educated. This suction channel 221 extends from the drill head 204 into a receiving space 220 a rotary union 205 , The rotary feedthrough 205 is connected to a suction device, not shown. The suction channel 221 opens in the axial direction parallel to the longitudinal axis L201 the suction drill 201 in the recording room 220 , This is achieved by the longitudinal groove 214a continue in the direction of a spit 202 the suction drill 201 extends as the coat 207 extends in this direction. The coat 207 points over its entire, in the direction of the longitudinal axis L201 The length of the Absaugbohrwerkzeugs extending an annular cross-section and is glued to the core 206.

In the 18 is a top view of a fourth embodiment of a suction drill 301 shown in schematic representation, wherein the suction drill 301 comparable to the second embodiment, which in the 9 to 16 is shown executed. By a circular line, which designed as a four-cutter drill head 304 is a borehole wall 901 indicated, so that a between a coat 307 and the borehole wall 901 forming outer supply air duct 317 can be seen in cross section. This is by longitudinal channels 351 and 352 enlarged, through which the jacket 307 in longitudinal grooves 314a and 314c a core 306 is formed. The longitudinal channel 351 is formed weaker than the longitudinal channel 352 so that between the coat 307 and the longitudinal groove 314a another suction channel 353 is trained. The longitudinal grooves 314b and 314d lie under undeformed areas of the mantle 307 and form suction channels 321 and 322 ,

In the 19 is in to the 18 Comparably, a fifth embodiment of a suction drill 401 shown in schematic representation. A drill head 404 is designed as a three-knife trimmer. Accordingly, a core has 406 three in cross-section partially differently shaped longitudinal grooves 414a, 414b and 414c. To increase an available for the influx of supply air cross section is a jacket 407 formed in the longitudinal groove 414 a, so that an enlarged outer supply air duct 417 is formed. The other two longitudinal grooves 414b and 414c are through the shell 407 covered and form suction channels 421 and 422 ,

In the 20 to 24 are as the sixth to tenth embodiment suction extraction 501 in a similar way as in the 18 and 19 shown. It is common to them that a drill head 504 is designed as a double cutter. Accordingly, the same reference numerals are used for all five variants.

The in the 20 shown sixth embodiment of the suction drill 501 includes two suction channels 521 . 522 and one through a longitudinal channel 551 enlarged outer supply air duct 517 ,

The in the 21 shown seventh embodiment of the suction drill 501 includes a suction channel 521 and one through a longitudinal channel 551 enlarged outer supply air duct 517 ,

The in the 22 shown eighth embodiment of the suction drill 501 includes two suction channels 521 . 522 and an annular supply air duct 517 annular in cross section. In this case, the suction ducts 521 . 522 different cross sections and a coat 507 is formed free of beads or longitudinal grooves.

The in the 23 shown ninth embodiment of the suction drill 501 includes two suction channels 521 . 522 and an annular supply air duct 517 annular in cross section. In this case, the suction ducts 521 . 522 congruent cross sections and a coat 507 is formed longitudinally free.

The in the 24 shown tenth embodiment of the suction drill 501 includes a suction channel 521 and a circular in cross-section, outer supply air duct 517. Here is a jacket 507 designed longitudinally free.

In the 25 to 32 are from eleventh to fifteenth embodiments of an extraction drill according to the invention 601 each shown schematic sectional views. In the cutting area is a core 606 formed as a profile shaft 616 and is of a jacket 607 envelops. For the sake of clarity was in the 25 to 32 dispensed with the hatching of cut surfaces.

The in the 25 shown eleventh embodiment shows a suction drill 601 , where a coat 607 in the form of a longitudinal channel 651 is pressed into a first longitudinal groove 614a, wherein a second longitudinal groove 614b a suction channel 621 forms.

The in the 26 shown twelfth embodiment shows a suction drill 601 , where a coat 607 in the form of a longitudinal channel 651 is slightly pressed into a longitudinal groove 614a, so that between the jacket 607 and the longitudinal groove 614a is a suction channel 621 is trained.

The in the 27 shown thirteenth variant shows a suction drill 601 , where a coat 607 in the form of longitudinal channels 651 . 652 is completely pressed into two opposite longitudinal grooves 614a, 614c and wherein the sheath 607 two more, opposite longitudinal grooves 614b, 614d covered and so two suction ducts 621 . 622 forms. Here is the cut in a borehole 903 executed, which is in a masonry 902 is trained. In the 28 is the section through the suction drill 601 shown again without showing the masonry.

In the 29 is a fourteenth variant of a variant of the in 27 and 28 shown suction drill. An Indian 29 shown suction drill 601 has a coat 607 on, which is parallel to a longitudinal axis perpendicular to the plane of the drawing L601 slotted throughout, so that this example, also transverse to the course of the longitudinal axis L601 can be pushed onto a core 606 and molded. In the 30 is the coat 607 shown alone and in a slightly bent-up state. Of course, the coat can 307 also in the direction of the course of the longitudinal axis L601 to the core 606 be deferred.

In the 31 is in addition to the representations of the in the 27 and 28 shown, thirteenth embodiment, the representation of 27 with additionally inserted cutting plate 611 shown, so that it can be seen that a diameter of the borehole 903 determined by a drill head 604.

In the 32 is as a fourteenth embodiment, a variant of the in the 27 . 28 and 31 shown thirteenth embodiment variant. This differs from the thirteenth embodiment in that a jacket 607 like the one in the 29 and 30 Sheath shown is divided by a longitudinal slot, wherein the sheath 607 by a connecting means 660 closed to a closed tube.

According to one in the 7 schematically indicated fifteenth embodiment, it is also envisaged the coat 7 as one of its drill head end area 7a from parallel to the longitudinal axis L1 over its length L7 as partial (as in the 7 shown schematically) or as completely by a straight slot 81 split slot sleeve 82 train. This is an insertion of the core 4 in the coat 7 at least partially relieved. After the assembly of core 6 and coat 7 or slotted sleeve 82 it is intended to be at the slot 81 opposite longitudinal edges 83 . 84 of the coat 7 connect to each other and in particular to glue and / or solder and / or to weld.

According to a likewise in the 7 schematically indicated sixteenth embodiment, it is also envisaged the coat 7 as one of its drill head end area 7a from over its length L7 as partial (as in the 7 shown schematically) or as completely by a helically encircling slot 85 form slit sleeve 86 formed. This is an insertion of the core 4 in the coat 7 at least partially relieved. After the assembly of core 6 and coat 7 or slotted sleeve 86 it is intended to be at the slot 85 opposite longitudinal edges 87 . 88 of the coat 7 connect to each other and in particular to glue and / or solder and / or to weld.

LIST OF REFERENCE NUMBERS

1

Absaugbohrwerkzeug

2

spigot

3

working section

4

wellhead

5

Rotary union

6

core

6b

helix free range of 6

7

coat

7a

Drill side end of 7

7b

Rotary feedthrough end of 7

8th

first inlet to 7b

9

second inlet to 7b

10

cutting element

10a - 10d

cutting edge

11, 12

cutting body

13

spiral

13a - 13d

Footbridge of 13

14a - 14d

helical

15

wave

16

spiral wave

17

outer supply air duct

18

inner supply air duct

19

inner supply air duct

20

accommodation space

21

first suction channel

22

second suction channel

23

spigot

24

suction

25

front camp of 5

26

rear warehouse of 5

27

Cavity of 7

28

Housing of 5

81

straight slot in 7

82

Slotted sleeve formed from 7

83, 84

Longitudinal edge from 7 to 81

85

helical circumferential slot in 7

86

slot sleeve

87, 88

Longitudinal edge from 7 to 85

AL

exhaust

AMF7

Outer surface of 7

D7

Outer diameter of 7

d7

Inner diameter of 7

WD1

Effective diameter of 1

D6

Outer diameter of 6

IMF7

Inner lateral surface of 7

L1

Longitudinal axis of 1

L24

Longitudinal axis of 24

P14a, P14b

arrow

OAS

surface section

S13a - S13d

Shoulder from 13a to 13d

TR7.1 - TR7.5

line

U

Surroundings

ZL

supply air

101

Absaugbohrwerkzeug

102

spigot

103

working section

104

wellhead

105

Rotary union

106

core

106b

longitudinal groove-free area of 106

107

coat

107a

end face of 107 on the drill head side

107b

Rotary feedthrough end v. 107

107c

front end of 107

108

first inlet to 107b

109

second inlet to 107b

110

cutting element

110a - 110d

cutting edge

111, 112

cutting body

113

profile

113a-113d

Footbridge of 113

114a-114d

longitudinal groove

115

wave

116

profile shaft

117

outer supply air duct

118

inner supply air duct

119

inner supply air duct

120

accommodation space

121

first suction channel

122

second suction channel

123

spigot

124

suction

125

front bearing of 105

126

rear bearing of 105

127

Cavity of 107

128

Case of 105

129

Basic body of 106 and 107

151, 152

Longitudinal gutter in 107

153, 154

Outer jacket groove at 107

AMF107

Outer surface area of 107

B125

Width of 125

D102

Diameter of 102

D106

Outer diameter of 106

D107

Outer diameter of 107

d107

Inner diameter of 107

D115

Diameter of 115

E114b, E114d

End of 114b, 114d

IMF107

Inner surface of 107

LU

Length difference

L101

Longitudinal axis of 101

L124

Longitudinal axis of 124

P114a, P114b

arrow

S113a - S113d

Shoulder from 113a to 113d

TR107.1 - TR107.5

line

WD101

Effective diameter of 101

Q151, Q152

Cross section of 151, 152

201

Suction Drill 201

202

Infinite 202

204

Drilling head 204

205

Rotary union 205

206

Core 206

207

coat 207

208

Inlet 208

214a

Longitudinal groove 214a

214b

second longitudinal groove 214b

218

inner supply air duct 218

220

Recording room 220

221

Suction duct 221

L201

longitudinal axis L201

301

Suction Drill Tool 301

304

Drilling head 304

306

Kern's 306

307

Coat 307

314a, 314c

longitudinal grooves 314a and 314c

314b, 314d

longitudinal grooves 314b and 314d

317

outer supply air duct 317

321, 322

suction 321 and 322 ,

351, 352

longitudinal grooves 351 and 352

353

Suction channel 353

401

Suction Drill 401

406

Core 406

407

coat 407

414a - 414c

Longitudinal grooves 414a, 414b and 414c

417

outer supply air duct 417

421, 422

suction 421 and 422 ,

501

Absaugbohrwerkzeuge

504

Drilling head 504

507

coat 507

517

outer supply air duct 517 ,

521, 522

suction 521 , 522

551

longitudinal groove 551

601

Suction Drill 601

606

Core 606

607

Coat 607

611

Insert 611

614a - 614d

longitudinal groove

616

Profile shaft 616

621, 622

suction 621 , 622

651, 652

longitudinal grooves 651 , 652

660

connecting means

L601

Longitudinal axis L601

901

borehole wall

902

masonry

903

well

911

suction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19810192 A1 [0002]

Claims (19)

A suction drilling tool (1; 101) for creating boreholes (903) in rock, concrete, masonry and the like, comprising an insertion end (2; 102), a working section (3; 103) connected to the insertion end (2; the working section (3; 103) connected to the drill head (4; 104), characterized in that - the working portion (3; 103) one with the shank (4; 104) integrally formed core (6; 106) and - in that the working portion (3; 103) comprises a tube-like jacket (7; 107) connected to the core (6; 106), and that between the jacket (7; 107) and the core (6; 106) at least one suction channel (21, 22 121, 122) is formed. Suction drill after Claim 1 characterized in that the shell (7; 107) deviates from the borehole (903) produced by the boring head (4; 104) of the suction boring tool (1; 101) by its shape and / or by its outer diameter (D7; D107) in that an outer supply air duct (17; 117) is formed between a borehole wall (901) and an outer casing surface (AMF7; AMF107) of the casing (7; 107). Suction drill after Claim 1 or Claim 2 , characterized in that between the jacket (7; 107) and the core (6; 106) at least one inner air inlet duct (21, 22; 121, 122) is formed, wherein it is provided in particular that the jacket (7; ) in an insertion-side end region (7b, 107b) has at least one inlet (8, 9, 108, 109), which in each case leads into the inner supply air duct (21, 22, 121, 122). Suction drill after Claim 1 or 2 or 3 , characterized in that the at least one suction channel (21, 22, 121, 122) opens at a drill head end region (7a, 107a) of the tubular jacket (7, 107) to the drill head (4, 104) and that the at least one suction channel (21, 22, 121, 122) extends to at least one rotary passage-side end region (7b, 107b) of the tubular jacket (7, 107) and / or that the at least one suction channel (21, 22, 121, 122) is opened by a radially arranged in the jacket (7; 107) outlet, wherein it is provided in particular that the suction channel (21, 22; 121, 122) is longer than the supply air duct (18, 19, 118, 119). Suction drilling tool according to at least one of the preceding claims, characterized in that the drill head (4; 104) comprises at least one cutting element (10; 110) with at least one cutting edge (10a-10d; 110a-110d), the cutting element (10; 110) in particular one or more cutting bodies (11, 12, 111, 112) and wherein it is provided in particular that the drill head (4, 104) is formed at least partially from a hard material or a hard metal. Suction drilling tool according to at least one of the preceding claims, characterized in that - the suction drilling tool (1; 101) comprises a rotary leadthrough (5; 105) which is arranged adjacent to the insertion end (2; 102) on the working section (3; - wherein the rotary feedthrough (5; 105) comprises a receiving space (20; 120), wherein the at least one suction channel (21, 22; 121, 122) opens into the receiving space (20, 120) and - in particular provided in that the rotary leadthrough (5; 105) comprises a suction opening (24; 124) through which the receiving space (20; 120) can be aspirated, wherein it is provided in particular that the suction opening (24; 124) is aligned with its longitudinal axis (L24 L124) is aligned approximately radially with respect to a longitudinal axis (L1; L101) of the suction drilling tool (1; 101). Suction drilling tool according to at least one of the preceding claims, characterized in that - the tubular jacket (7; 107) is formed of a metallic material or of a particular tissue-containing composite material or of a particular multilayer plastic or of a hard material. Suction drilling tool according to at least one of the preceding claims, characterized in that - the tubular jacket (7, 107) has a slot (81; 85) extending from its rotary bushing-side end region (7b; 107b) to its end face (7a; wherein it is provided in particular that the slot (81; 85) is formed as a straight slot (81) or as a helically encircling slot (85) and - it being provided in particular that the jacket (7; 107) to its longitudinal edges (83, 84; 87, 88), which are opposite to the slot (81, 85), are deformed towards their longitudinal axis (L1, L101) and in particular are folded and / or that longitudinal edges (83, 84, 87 , 88) of the jacket (7; 107), which are opposite to the slot (81; 85), are connected to one another in the assembled state of the jacket (7; 107). Suction drill after Claim 6 characterized in that a rotary feedthrough end portion (7b; 107b) of the tubular shell (7; 107) is interposed between the core (6; 106) and the rotary feedthrough (5; 105) is positioned so that the at least one suction channel (21, 22; 121, 122) opens into the receiving space (20; 120) of the rotary leadthrough (5; 105). Suction drill according to at least one of Claims 1 to 9 characterized in that - the core (6) comprises at least one helix (13) spirally revolving over the region of the tubular shell (7) about a longitudinal axis (L1) of the suction drilling tool (1) and forming a spiral shaft (16) a helical groove (14a-14d) of the helix (13) is covered by the tubular jacket (7) and forms at least one suction channel (21, 22) or - that the core (106) is at least one over the region of the tubular jacket ( 107) parallel to a longitudinal axis (L101) of the Absaugbohrwerkzeugs (101) extending longitudinal groove (114a - 114d) and forms a profiled shaft (116), wherein the longitudinal groove (114a - 114d) is covered by the tubular jacket (107) and the at least forms a suction channel (121, 122). Suction drilling tool according to at least one of the preceding claims, characterized in that the tubular jacket (7) is secure against displacement in the direction of a longitudinal axis (L1) of the suction drilling tool (1) and secured against rotation about the longitudinal axis (L1) of the suction drilling tool (1) with the core (6 ) and in particular connected such that the core (6) and the jacket (7) are glued and / or soldered and / or welded and / or are connected by a press fit or - that the tubular jacket (7) against displacement in the direction of a longitudinal axis (L1) of the Absaugbohrwerkzeugs (1) is connected to the core (6) and rotatably mounted about the longitudinal axis (L1) of Absaugbohrwerkzeugs (1) on the core (6) and in particular is mounted such that the jacket (7) is mounted between the drill head (4) and a rotary feedthrough (5) of the Absaugbohrwerkzeugs (1). Suction drill according to at least one of Claims 1 to 10 characterized in that the shaft (115) comprises either at least two longitudinal grooves (114a-114d) or at least two helical grooves such that the tubular sheath (107) extends from the drill head (104) towards the shank end (102) over a length, which is greater than a maximum allowable hole depth with the suction drill, is pressed into at least one and at most all but one of the longitudinal grooves (114a - 114d) or the spiral grooves, that between an imaginary peripheral cylinder of the shell (107) and one by the impressions at least one outer jacket groove (153, 154) is formed in the longitudinal groove (114a-114d) formed on an outer circumferential surface (AMF107) of the shell (107) or by spiraling into the spiral groove formed on an outer circumferential surface of the shell , which forms or increases the outer supply air duct (117), wherein the longitudinal channel (151, 152) or the spiral channel in particular such au is formed that the shell (107) with its inner circumferential surface (IMF107) partially or completely against a surface of the longitudinal groove (114a - 114d) or on a surface of the helical groove. Suction drill according to at least one of the preceding Claims 1 to 10 characterized in that the shaft (115) comprises either at least one longitudinal groove (114a-114d) or at least one helical groove such that the tubular sheath (107) extends from the drill head (104) towards the shank end (102) over a length, which is greater than a maximum allowable hole depth with the suction drill, is pressed into one of the longitudinal grooves (114a-114d) or into one of the helical grooves, that between an imaginary peripheral cylinder of the jacket (107) and a by the impressions in the longitudinal groove ( 114a-114d) formed on an outer circumferential surface (AMF107) of the shell (107) longitudinal groove (151, 152) or by the depression in the spiral groove on an outer circumferential surface (AMF107) of the shell (107) spiral groove formed a Außenmantelnut (153, 154) is that which forms or increases the supply air duct, and - that between the longitudinal groove (114a - 114d) and the jacket (107) or between the helical groove and the jacket (107) u mlaufend closed cross-section reduced inner jacket channel is maintained, which forms the at least one suction channel (121, 122). Suction drill according to at least one of Claims 1 to 10 . 12 . 13 characterized in that the shaft (115) comprises four longitudinal grooves (114a-114d) or helical grooves distributed in particular uniformly around its circumference, the sheath (107) being pressed into a first pair of opposed longitudinal grooves (114b, 114d) and helical grooves, respectively, and wherein the sheath (107) covers a second pair of opposed longitudinal grooves (114a, 114c) and spiral grooves undeformed. A method of manufacturing a suction drilling tool (1; 101) comprising the steps of producing a one-piece core (6; 106) comprising at least one male end (2; 102) and one shaft (15; 115), said shaft (15; 115 ) is formed as a spiral shaft (16) with at least one helical groove (14a - 14d) or as a profiled shaft (116) with at least one longitudinal groove (114a - 114d), Applying a jacket (7; 107) to the shaft (15; 115) of the core (6; 106) to form a working section (3; 103). Method according to Claim 15 comprising the step of: - applying a rotary feedthrough (5; 105) to the working section (3; 103) before or after applying the jacket, the rotary feedthrough being applied such that a rotary feedthrough end region (7b; 107b) of the jacket (7; 107) adjacent to the rotary feedthrough (5; 105) or is overlapped by the rotary feedthrough. Method for producing a suction drill according to Claim 15 or 16 comprising the step of fastening a drill head (4; 104), optionally in particular such that the drill head (4; 104) - either before the application of the jacket (7; 107) during or after the manufacture of the core (6; 106) is connected to the core (6, 106) - or after the application of the jacket (7, 107) is connected to the core (6, 106) - or after the application of the jacket (7, 107) with the core ( 6, 106) and to the shell (7, 107). Method according to Claim 15 or 16 or 17 comprising the step of: - connecting sheath (7; 107) and core (6; 106) and / or sheath (7; 107) and drill head (4; 104) such that the sheath (7; Direction of a longitudinal axis (L1; L101) of the suction drilling tool (1; 101) is connected to the core (6; 106) and / or the drill head (4; 104) or - that the jacket (7; 107) is secure against displacement in the direction of a longitudinal axis (L1; L101) of the suction drilling tool (1; 101) and non-rotatably connected about the longitudinal axis (L1; L101) of the suction drilling tool (1) to the core (6; 106) and / or the drill head (4; 104), the connection is formed in particular form-fitting and / or non-positive. Method for producing a suction drill according to Claim 15 or 16 or 17 or 18 , characterized in that the shaft (115), which is formed as a helical shaft or as a profiled shaft (116) comprises at least one helical groove or at least one longitudinal groove (114a - 114d) and that the jacket (107) of the drill head (104) starting in the direction of the insertion end (102) over a length which is greater than a maximum allowable borehole depth with the suction drilling tool (101), for forming at least one outer jacket groove (153, 154) in at least one of the spiral grooves or in at least one of the longitudinal grooves (114a) 114d) in the direction of a longitudinal axis (L101) of the Absaugbohrwerkzeugs (101) is pressed.

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