EP0469356A1 - Tool holder for hammer drills - Google Patents

Tool holder for hammer drills Download PDF

Info

Publication number
EP0469356A1
EP0469356A1 EP19910111530 EP91111530A EP0469356A1 EP 0469356 A1 EP0469356 A1 EP 0469356A1 EP 19910111530 EP19910111530 EP 19910111530 EP 91111530 A EP91111530 A EP 91111530A EP 0469356 A1 EP0469356 A1 EP 0469356A1
Authority
EP
European Patent Office
Prior art keywords
tool holder
shaft
hammer
plug
tool
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
EP19910111530
Other languages
German (de)
French (fr)
Other versions
EP0469356B1 (en
Inventor
Manfred Bleicher
Ulrich Dipl.-Ing. Bohne
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0469356A1 publication Critical patent/EP0469356A1/en
Application granted granted Critical
Publication of EP0469356B1 publication Critical patent/EP0469356B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/005—Attachments or adapters placed between tool and hammer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit

Definitions

  • the invention is based on a tool holder according to the preamble of claim 1.
  • a tool holder which can be coupled as an attachment with a rotary hammer, is known from DE-PS 36 37 354. In this case, only the striking movement is transmitted to the tool holder. Rotary drilling is therefore not possible with this tool holder.
  • the tool holders for grooved shank tools attached to rotary hammers are also not suitable for precise rotary drilling due to the wear on the mounting holes during hard impact operations. Because of the poor concentricity, the quality of holes, for example in metal, is mostly unsatisfactory.
  • the tool holder according to the invention with the characterizing features of claim 1 has the advantage that exact round bores can be made with a hammer drill even when the tool holder is knocked out. For this purpose, the transmission of the hammer action is suppressed and the tool holder is attached to the clamping neck of the hammer drill.
  • a drill chuck arranged in extension to the tool holder of the rotary hammer and connected to the rotary drive of the hammer, in particular a three-jaw chuck, ensures exact concentricity of the drilling tool used.
  • the mounting of the shaft of the tool holder corresponding to a drilling spindle via two spaced roller bearings further contributes to a quiet and exact concentricity of the drill chuck.
  • the shaft sits with play in the tool holder of the rotary hammer, so that concentricity inaccuracies are compensated for.
  • the tool holder is quick and easy to assemble and disassemble.
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
  • the figure shows a longitudinal section through a hammer drill with a tool holder attached.
  • the percussion mechanism 3 which is known per se, essentially consists of a rotary wobble finger 5 which drives a piston 6 back and forth.
  • the striker 7 In the cup-shaped piston 6 there is a striker 7 which is accelerated forward by an air cushion formed between the piston and the striker in the direction of the tool holder 4.
  • the striker 7 strikes another striking body, a striker 8.
  • the striker 8 projects into the tool holder 4 and strikes the end of the shaft when the tool is inserted into the tool holder 4.
  • the tool holder 4 has a receiving bore 10 in which two axially extending rotary driving bars 11 are arranged opposite one another. Otherwise, the tool holder corresponds to that from DE-PS 36 37 354. In particular, it also has spring-loaded locking body 12.
  • a clamping neck 14 is arranged on the tool holder 4 on the housing 2 of the hammer drill.
  • a tool holder 15 with its push-on part 16 made of plastic is placed on the clamping neck 14.
  • the plug-on part 16 like the tool holder according to DE-PS 36 37 354, has a slot 17 and can be firmly clamped onto the clamping neck 14 by means of a clamping screw, not shown, reaching through a bore 18.
  • two roller bearings 20, 21 are arranged at a distance from one another in the area in front of the tool holder 4. The distance between the roller bearings 20, 21 is determined by a spacer sleeve 22.
  • a shaft 24 is mounted in the roller bearings 20, 21 and engages with one end 25 in the tool holder 4.
  • the shaft 24 has, as a means for rotational driving, two opposite rotational driving grooves 26, in which the rotary driving bars 11 engage. Otherwise, the shaft end 25 has a cylindrical cross section, so that in particular the locking bodies 12 do not engage in the shaft end 25.
  • the shaft end 25 is only so far in the tool holder 4 that it can no longer be reached by the striker 8 in its foremost position.
  • the shaft 24 carries a thread 27 onto which a commercially available drill chuck is screwed.
  • the drill chuck 28 can in particular be designed as a three-jaw chuck into which drilling tools can be clamped exactly centrally.
  • a clamping neck 29 is formed on the plug-on part 16 of the tool holder 15 in the area of the roller bearings 20, 21, and its diameter corresponds to that of the clamping neck 14 of the rotary hammer.
  • the tool holder 15 transmits the rotary movement of the tool holder 4 of the hammer drill mers via the rotary driving bars 11 and the rotary driving grooves 26 on the shaft 24 and further on the drill chuck 28.
  • the striking movement of the striking mechanism 3 is not transmitted to the tool holder 15.
  • the tool holder 15 is axially fixed on the clamping neck 14 of the hammer drill. Any wear on the receiving bore 10 has no effect on the concentricity of the drill chuck 28, since the shaft 24 sits in the receiving bore 10 with play. This is achieved in that the shaft end 25 has a slightly smaller diameter than the tool shanks usually used in the tool holder 4.
  • the concentricity of the drill chuck 28 is rather ensured by the tight fit of the plug-on part 16 on the clamping neck 14 of the hammer drill.
  • the invention is not limited to the exemplary embodiments shown.
  • the means for rotary driving as different, e.g. B. not diametrically opposed but otherwise associated grooves or formed as strips.

Abstract

The proposed tool holder has the advantage that accurate round holes can be made with it, using a hammer drill, even if the tool-holding fixture is deflected. For this purpose, the transmission of the precursive-mechanism action is suppressed and a tool holder (28) is fixed to the collar (29) of the hammer drill and centred. A drill chuck (28), arranged in the extension of the tool-holding fixture (4) of the hammer drill and connected to the rotary drive of the hammer, ensures exact concentric running of the inserted drilling tool. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Werkzeughalter nach der Gattung des Anspruchs 1. Ein solcher als Vorsatzgerät mit einem Bohrhammer koppelbarer Werkzeughalter ist aus der DE-PS 36 37 354 bekannt. Hierbei wird lediglich die Schlagbewegung auf den Werkzeughalter übertragen. Mit diesem Werkzeughalter ist also Drehbohren nicht möglich. Die an Bohrhämmern angebrachten Werkzeugaufnabmen für Nutenschaftwerkzeuge eignen sich aufgrund des Verschleißes an den Aufnahmebohrungen beim harten Schlagbetrieb ebenfalls nicht für exaktes Drehbohren. Wegen der schlechten Rundlaufeigenschaften ist die Qualität von Bohrungen, beispielsweise in Metall meist unbefriedigend.The invention is based on a tool holder according to the preamble of claim 1. Such a tool holder, which can be coupled as an attachment with a rotary hammer, is known from DE-PS 36 37 354. In this case, only the striking movement is transmitted to the tool holder. Rotary drilling is therefore not possible with this tool holder. The tool holders for grooved shank tools attached to rotary hammers are also not suitable for precise rotary drilling due to the wear on the mounting holes during hard impact operations. Because of the poor concentricity, the quality of holes, for example in metal, is mostly unsatisfactory.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Werkzeughalter mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß mit einem Bohrhammer auch bei ausgeschlagener Werkzeugaufnahme exakte Rundbohrungen ausgeführt werden können. Zu diesem Zweck wird die Übertragung der Schlagwerkstätigkeit unterdrückt und der Werkzeughalter am Spannhals des Bohrhammers befestigt. Ein in Verlängerung zur Werkzeugaufnahme des Bohrhammers angeordnetes und mit dem Drehantrieb des Hammers verbundenes Bohrfutter, insbesondere ein Dreibackenfutter, stellt einen exakten Rundlauf des eingesetzten Bohrwerkzeugs sicher. Die Lagerung des einer Bohrspindel entsprechenden Schaftes des Werkzeughalters über zwei beabstandete Wälzlager trägt weiter zu einen ruhigen und exakten Rundlauf des Bohrfutters bei. Der Schaft sitzt mit Spiel in dem Werkzeughalter des Bohrhammers, sodaß Rundlaufungenauigkeiten dadurch ausgeglichen werden. Der Werkzeughalter ist als Vorsatzgerät leicht und schnell an- und abzubauen. An den Spannhals der Werkzeugaufnahme, die den gleichen Durchmesser aufweist wie der des Bohrhammers, lassen sich alle üblichen Zusatzgeräte wie z.B. Zusatzhandgriff anbringen.The tool holder according to the invention with the characterizing features of claim 1 has the advantage that exact round bores can be made with a hammer drill even when the tool holder is knocked out. For this purpose, the transmission of the hammer action is suppressed and the tool holder is attached to the clamping neck of the hammer drill. A drill chuck arranged in extension to the tool holder of the rotary hammer and connected to the rotary drive of the hammer, in particular a three-jaw chuck, ensures exact concentricity of the drilling tool used. The mounting of the shaft of the tool holder corresponding to a drilling spindle via two spaced roller bearings further contributes to a quiet and exact concentricity of the drill chuck. The shaft sits with play in the tool holder of the rotary hammer, so that concentricity inaccuracies are compensated for. The tool holder is quick and easy to assemble and disassemble. On the clamping neck of the tool holder, which has the same diameter as that of the rotary hammer, all usual additional devices such as Attach the additional handle.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Die Figur zeigt einen Längsschnitt durch einen Bohrhammer mit aufgesetztem Werkzeughalter.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The figure shows a longitudinal section through a hammer drill with a tool holder attached.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Von einem Bohrhammer ist nur der vordere, in einem Gehäuse 2 untergebrachte Teil gezeigt, der ein Schlagwerk 3 und eine Werkzeugaufnahme 4 zeigt. Das an sich bekannte Schlagwerk 3 besteht im wesentlichen aus einem drehend angetriebenen Taumelfinger 5, der einen Kolben 6 hin- und hergehend antreibt. In dem topfförmig ausgebildeten Kolben 6 befindet sich ein Schläger 7, der von einem zwischen Kolben und Schläger ausgebildeten Luftpolster nach vorn in Richtung auf die Werkzeugaufnahme 4 beschleunigt wird. Der Schläger 7 trifft dabei auf einen weiteren Schlagkörper, einen Döpper 8. Der Döpper 8 ragt in die Werkzeugaufnahme 4 hinein und schlägt bei in die Werkzeugaufnahme 4 eingesetztem Werkzeug auf dessen Schaftende.Only the front part of a rotary hammer, which is accommodated in a housing 2, is shown, which shows a striking mechanism 3 and a tool holder 4. The percussion mechanism 3, which is known per se, essentially consists of a rotary wobble finger 5 which drives a piston 6 back and forth. In the cup-shaped piston 6 there is a striker 7 which is accelerated forward by an air cushion formed between the piston and the striker in the direction of the tool holder 4. The striker 7 strikes another striking body, a striker 8. The striker 8 projects into the tool holder 4 and strikes the end of the shaft when the tool is inserted into the tool holder 4.

Die Werkzeugaufnahme 4 hat eine Aufnahmebohrung 10, in der zwei sich axial erstreckende Drehmitnahmeleisten 11 gegenüberliegend angeordnet sind. Im übrigen entspricht die Werkzeugaufnahme derjenigen aus der DE-PS 36 37 354. Insbesondere weist sie auch federbelastete Verriegelungskörper 12 auf.The tool holder 4 has a receiving bore 10 in which two axially extending rotary driving bars 11 are arranged opposite one another. Otherwise, the tool holder corresponds to that from DE-PS 36 37 354. In particular, it also has spring-loaded locking body 12.

Am Gehäuse 2 des Bohrhammers ist auf die Werkzeugaufnahme 4 hingerichtet ein Spannhals 14 angeordnet. Auf den Spannhals 14 ist ein Werkzeughalter 15 mit seinem Aufsteckteil 16 aus Kunststoff aufgesetzt. Das Aufsteckteil 16 weist wie der Werkzeughalter nach der DE-PS 36 37 354 einen Schlitz 17 auf und ist mittels einer nicht gezeigten durch eine Bohrung 18 greifende Spannschraube auf den Spannhals 14 fest aufspannbar. Innerhalb des Aufsteckteils 16 sind im Bereich vor der Werkzeugaufnahme 4 mit Abstand zueinander zwei Wälzlager 20, 21 angeordnet. Der Abstand zwischen den Wälzlagern 20, 21 wird durch eine Distanzhülse 22 bestimmt. In den Wälzlagern 20, 21 ist ein Schaft 24 gelagert, der mit einem Ende 25 in die Werkzeugaufnahme 4 eingreift. An dem Ende 25 weist der Schaft 24 als Mittel zur Drehmitnahme zwei gegenüberliegende Drehmitnahmenuten 26 auf, in die die Drehmitnahmeleisten 11 eingreifen. Ansonsten weist das Schaftende 25 einen zylindrischen Querschnitt auf, so daß insbesondere die Verriegelungskörper 12 nicht in das Schaftende 25 eingreifen. Das Schaftende 25 steckt nur soweit in der Werkzeugaufnahme 4, daß es von dem Döpper 8 in dessen vorderster Stellung nicht mehr erreicht werden kann. An seinem gegenüberliegenden Ende trägt der Schaft 24 ein Gewinde 27, auf das ein handelsübliches Bohrfutter aufgeschraubt ist. Das Bohrfutter 28 kann insbesondere als Dreibackenfutter ausgebildet sein, in das sich Bohrwerkzeuge exakt zentrisch spannen lassen. An dem Aufsteckteil 16 des Werkzeughalters 15 ist im Bereich der Wälzlager 20, 21 ein Spannhals 29 ausgebildet, der in seinem Durchmesser demjenigen Spannhals 14 des Bohrhammers entspricht.A clamping neck 14 is arranged on the tool holder 4 on the housing 2 of the hammer drill. A tool holder 15 with its push-on part 16 made of plastic is placed on the clamping neck 14. The plug-on part 16, like the tool holder according to DE-PS 36 37 354, has a slot 17 and can be firmly clamped onto the clamping neck 14 by means of a clamping screw, not shown, reaching through a bore 18. Within the plug-on part 16, two roller bearings 20, 21 are arranged at a distance from one another in the area in front of the tool holder 4. The distance between the roller bearings 20, 21 is determined by a spacer sleeve 22. A shaft 24 is mounted in the roller bearings 20, 21 and engages with one end 25 in the tool holder 4. At the end 25, the shaft 24 has, as a means for rotational driving, two opposite rotational driving grooves 26, in which the rotary driving bars 11 engage. Otherwise, the shaft end 25 has a cylindrical cross section, so that in particular the locking bodies 12 do not engage in the shaft end 25. The shaft end 25 is only so far in the tool holder 4 that it can no longer be reached by the striker 8 in its foremost position. At its opposite end, the shaft 24 carries a thread 27 onto which a commercially available drill chuck is screwed. The drill chuck 28 can in particular be designed as a three-jaw chuck into which drilling tools can be clamped exactly centrally. A clamping neck 29 is formed on the plug-on part 16 of the tool holder 15 in the area of the roller bearings 20, 21, and its diameter corresponds to that of the clamping neck 14 of the rotary hammer.

Der Werkzeughalter 15 überträgt die Drehbewegung der Werkzeugaufnahme 4 des Bohrhammers über die Drehmitnahmeleisten 11 und die Drehmitnahmenuten 26 auf den Schaft 24 und weiter auf das Bohrfutter 28. Die Schlagbewegung des Schlagwerks 3 wird nicht auf den Werkzeughalter 15 übertragen. Der Werkzeughalter 15 sitzt axial fest auf dem Spannhals 14 des Bohrhammers. Etwaiger Verschleiß an der Aufnahmebohrung 10 bleibt ohne Auswirkung auf den Rundlauf des Bohrfutters 28, da der Schaft 24 mit Spiel in der Aufnahmebohrung 10 sitzt. Dies wird dadurch erreicht, daß das Schaftende 25 einen etwas geringeren Durchmesser aufweist, als die üblicherweise in die Werkzeugaufnahme 4 eingesetzten Werkzeugschäfte. Der Rundlauf des Bohrfutters 28 wird vielmehr durch den festen Sitz des Aufsteckteils 16 an dem Spannhals 14 des Bohrhammers gewährleistet.The tool holder 15 transmits the rotary movement of the tool holder 4 of the hammer drill mers via the rotary driving bars 11 and the rotary driving grooves 26 on the shaft 24 and further on the drill chuck 28. The striking movement of the striking mechanism 3 is not transmitted to the tool holder 15. The tool holder 15 is axially fixed on the clamping neck 14 of the hammer drill. Any wear on the receiving bore 10 has no effect on the concentricity of the drill chuck 28, since the shaft 24 sits in the receiving bore 10 with play. This is achieved in that the shaft end 25 has a slightly smaller diameter than the tool shanks usually used in the tool holder 4. The concentricity of the drill chuck 28 is rather ensured by the tight fit of the plug-on part 16 on the clamping neck 14 of the hammer drill.

Die Erfindung beschränkt sich nicht auf die gezeigten Ausführungsbeispiele. Insbesondere können die Mittel zur Drehmitnahme als anders, z. B. nicht diametral gegenüberliegende sondern anderweitig einander zugeordnete Nuten oder als Leisten ausgebildet sein.The invention is not limited to the exemplary embodiments shown. In particular, the means for rotary driving as different, e.g. B. not diametrically opposed but otherwise associated grooves or formed as strips.

Claims (7)

1. Werkzeughalter zur Koppelung an eine Werkzeugaufnahme (4) für Nutenschaftwerkzeuge eines Bohrhammers mit einem an dessen Spannhals (14) zu befestigenden Aufsteckteil (16) und mit einem in die Werkzeugaufnahme (4) des Bohrhammers eingreifenden Schaft (24), dadurch gekennzeichnet, daß der Schaft (24) drehbar in dem Aufsteckteil (16) gelagert ist, Mittel (26) aufweist, die mit der Werkzeugaufnahme (4) im Eingriff stehend der Drehmitnahme dienen und daß die Länge des Schaftes (24) so bestimmt ist, daß er die Schlagkörper (7, 8) in keinem Falle berührt.1. Tool holder for coupling to a tool holder (4) for grooved shank tools of a rotary hammer with a plug-on part (16) to be fastened to its clamping neck (14) and with a shaft (24) engaging in the tool holder (4) of the rotary hammer, characterized in that the shaft (24) is rotatably mounted in the plug-on part (16), has means (26) which are used to engage in rotation with the tool holder (4) and that the length of the shaft (24) is so determined that it Impact body (7, 8) never touched. 2. Werkzeughalter nach Anspruch 1, dadurch gekennzeichnet, daß er ein Bohrfutter (28) aufweist, wobei dieses drehfest mit dem Schaft (24) verbunden ist.2. Tool holder according to claim 1, characterized in that it has a drill chuck (28), which is rotatably connected to the shaft (24). 3. Werkzeughalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Schaft (24) in dem Aufsteckteil in zwei voneinander beabstandeten Wälzlagern (20, 21) gelagert ist.3. Tool holder according to claim 1 or 2, characterized in that the shaft (24) is mounted in the plug-in part in two spaced-apart roller bearings (20, 21). 4. Werkzeughalter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schaft (24) Längsnuten (26) zum Eingriff in Drehmitnahmeleisten (11) der Werkzeugaufnahme (4) des Bohrhammers aufweist.4. Tool holder according to one of the preceding claims, characterized in that the shank (24) has longitudinal grooves (26) for engagement in rotary driving bars (11) of the tool holder (4) of the hammer drill. 5. Werkzeughalter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schaft (24) mit Spiel in der Aufnahmebohrung (10) der Bohrhammer-Werkzeugaufnahme (4) sitzt.5. Tool holder according to one of the preceding claims, characterized in that the shaft (24) sits with play in the receiving bore (10) of the hammer drill tool holder (4). 6. Werkzeughalter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Aufsteckteil (16) aus Kunststoff besteht.6. Tool holder according to one of the preceding claims, characterized in that the plug-on part (16) consists of plastic. 7. Werkzeughalter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Aufsteckteil (16) vorzugsweise im Bereich der Wälzlager (20, 21) einen Spannhals (29) vom gleichen Durchmesser hat, den auch der Spannhals (14) des Bohrhammers aufweist.7. Tool holder according to one of the preceding claims, characterized in that the plug-on part (16) preferably in the region of the roller bearings (20, 21) has a clamping neck (29) of the same diameter as that of the clamping neck (14) of the rotary hammer.
EP91111530A 1990-08-02 1991-07-11 Tool holder for hammer drills Expired - Lifetime EP0469356B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9011315U DE9011315U1 (en) 1990-08-02 1990-08-02
DE9011315U 1990-08-02

Publications (2)

Publication Number Publication Date
EP0469356A1 true EP0469356A1 (en) 1992-02-05
EP0469356B1 EP0469356B1 (en) 1993-10-20

Family

ID=6856142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111530A Expired - Lifetime EP0469356B1 (en) 1990-08-02 1991-07-11 Tool holder for hammer drills

Country Status (3)

Country Link
EP (1) EP0469356B1 (en)
JP (1) JP3100681B2 (en)
DE (2) DE9011315U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310392A (en) * 1996-02-06 1997-08-27 Bosch Gmbh Robert A mount of a needle chisel for a hammer drill

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0108411A1 (en) * 1982-11-10 1984-05-16 Eugen Lutz GmbH & Co. Maschinenfabrik Drilling machine
EP0199842A1 (en) * 1985-05-02 1986-11-05 Licentia Patent-Verwaltungs-GmbH Electropneumatic percussion drill
DE3637354A1 (en) * 1986-11-03 1988-05-05 Bosch Gmbh Robert Tool holder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0108411A1 (en) * 1982-11-10 1984-05-16 Eugen Lutz GmbH & Co. Maschinenfabrik Drilling machine
EP0199842A1 (en) * 1985-05-02 1986-11-05 Licentia Patent-Verwaltungs-GmbH Electropneumatic percussion drill
DE3637354A1 (en) * 1986-11-03 1988-05-05 Bosch Gmbh Robert Tool holder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310392A (en) * 1996-02-06 1997-08-27 Bosch Gmbh Robert A mount of a needle chisel for a hammer drill
GB2310392B (en) * 1996-02-06 1998-04-08 Bosch Gmbh Robert A device for mounting an auxiliary device on a hand machine tool

Also Published As

Publication number Publication date
EP0469356B1 (en) 1993-10-20
DE9011315U1 (en) 1991-11-28
JP3100681B2 (en) 2000-10-16
JPH04360740A (en) 1992-12-14
DE59100501D1 (en) 1993-11-25

Similar Documents

Publication Publication Date Title
DE3310371C2 (en)
DE2660357C2 (en) Attachment device for portable power tools having a drive shaft for drilling and screwing
AT391825B (en) DRILL CHUCK FOR HAND DEVICES
EP2295206B1 (en) Electric combined hand-held power tool
EP0618031B1 (en) Hand-held drilling machine and its tool holder
EP0253761B1 (en) Chuck for tools
EP0494400A2 (en) Hand-tool with removable tool-holder
DE2354168A1 (en) TOOL HOLDER FOR A CRAFT MACHINE
DE10044387A1 (en) Tool holder for a hand machine tool
DE3443186C2 (en) Lining for hand machine tools, in particular rotary and / or impact hammers
CH688576A5 (en) Device on hand machine tools for the rotary driving of tools.
CH655892A5 (en) DRILLING HAMMER WITH GUIDE CYLINDER FOR THE STRIKE.
DE3328886A1 (en) Electric hammer drill
DE3843465A1 (en) Device for clamping tools
DE3828309C3 (en) Hammer drill
DE3331866A1 (en) DRILLING HAMMER
DE4328358A1 (en) Hand drill, in particular hammer drill
DE4010239C2 (en)
EP0469356B1 (en) Tool holder for hammer drills
DE3405102C2 (en)
DE4445598C2 (en) Hand-held machine tool
DE2750219C2 (en) Tool holder for a hammer or rotary hammer
DE3637354A1 (en) Tool holder
DE3511491C2 (en)
DE19731602A1 (en) Hammer drill

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB LI

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

17P Request for examination filed

Effective date: 19920703

17Q First examination report despatched

Effective date: 19920923

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59100501

Country of ref document: DE

Date of ref document: 19931125

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19931102

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980703

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980720

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980728

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980922

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990731

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990731

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990711

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST