EP1724068B1 - Drilling tool - Google Patents

Drilling tool Download PDF

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Publication number
EP1724068B1
EP1724068B1 EP05010813A EP05010813A EP1724068B1 EP 1724068 B1 EP1724068 B1 EP 1724068B1 EP 05010813 A EP05010813 A EP 05010813A EP 05010813 A EP05010813 A EP 05010813A EP 1724068 B1 EP1724068 B1 EP 1724068B1
Authority
EP
European Patent Office
Prior art keywords
drilling tool
chuck
tool according
drive shaft
locking
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.)
Not-in-force
Application number
EP05010813A
Other languages
German (de)
French (fr)
Other versions
EP1724068A1 (en
Inventor
Gerhard Maurer
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Priority to AT05010813T priority Critical patent/ATE391585T1/en
Priority to DE502005003653T priority patent/DE502005003653D1/en
Priority to EP05010813A priority patent/EP1724068B1/en
Publication of EP1724068A1 publication Critical patent/EP1724068A1/en
Application granted granted Critical
Publication of EP1724068B1 publication Critical patent/EP1724068B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/141—Mechanical overload release couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003—Clutches specially adapted therefor
    • 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
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/165—Overload clutches, torque limiters

Definitions

  • the invention relates to a tool-less mountable on a drive spindle and removable tool chuck, and a drill tool, in particular hammer drill, with a tool-less on a drive spindle mountable and removable tool chuck (quick-change chuck) with a manually operated locking and release mechanism for the tool chuck, and with a in the Tool chuck integrated clutch device, for bringing about a rotary coupling between the drive spindle and the tool chuck.
  • a drilling tool device having the features of the preamble of claim 1 and a tool chuck having the features of the preamble of claim 21 are made EP 1236538 known.
  • a drill tool of the above type has become known for example by the hammer drill of the applicant of the trade name UHE and in the main catalog 2005/2006 described above.
  • Overload clutches in electrical hand tool devices are for example by DE 101 31 220 Cl became known.
  • the object of the present invention is to improve drilling tool devices, in particular rotary hammers, with regard to further functionality.
  • quick change chuck can be used to hold and use, for example, a hammer chuck for a hammer or hammer drill operation or to select either a pure drill chuck for a drilling operation or in conjunction with bits for a screwing.
  • the integration of an overload clutch with adjustable torque in a quick-change chuck increases the functionality of the tool device and proves to be advantageous in this respect.
  • the Drehmomenteinstell shark is formed by components of the locking and release mechanism for the tool chuck. In this way, the number of components that must be used on the one hand for the realization of a locking and releasing mechanism and on the other hand for the formation of a torque-adjustable coupling device can be reduced.
  • the locking and releasing mechanism comprises a manual actuating means, which may be formed in particular sleeve-shaped, which also forms the actuator for the Drehmomenteinstell issued.
  • the manual actuating means is preferably adjustable in the direction of a tool longitudinal axis.
  • a longitudinal displacement for the actuating means could be provided;
  • the manual actuating means is rotatable about the tool longitudinal axis and thereby displaced in the direction of the tool longitudinal axis.
  • the actuating means sits on a thread on a radially inner sleeve-shaped portion of the tool chuck, which surrounds the drive spindle.
  • the actuating means is on the one hand rotatably guided, and it is on the other hand achieved in accordance with the rotation targeted axial displacement.
  • the locking and release mechanism has radially displaceable locking body, in particular balls or rollers, which connect the tool chuck axially with the drive spindle.
  • the locking body are pressed into recesses in the drive spindle, so that in this way an axial coupling is achieved and the tool chuck is firmly seated on the drive shaft.
  • the aforementioned sleeve-shaped portion or other components of the locking and release mechanism are designed so that the locking body, although radial displaced, but are held captive in the tool chuck radially inwards.
  • the locking body not only serve to form an axial coupling between the tool chuck and drive spindle, but that they also cause a rotational coupling between the drive spindle and tool chuck, for example, perform a percussion drilling or a hammer drill operation or even a pure drilling operation to be able to.
  • the locking bodies preferably provided cooperate in particular with rotary driving means provided on the drive spindle. These may be indentations or elevations which bring about rotational drive in the circumferential direction.
  • the force with which the locking bodies are pressed against the drive spindle or against the rotary driving means, by the aforementioned actuating means of the locking and releasing mechanism for the tool chuck is adjustable.
  • the locking and release mechanism has a displacement body which presses the locking body against the drive spindle.
  • the actuating means is then displaced such that the displacement body is brought out of its locking body against the drive spindle pushing position or in turn is displaced by a displacement of the displacer due to an axial movement of the chuck body itself in the release position.
  • the locking and releasing mechanism comprises a spring means which acts on the displacer.
  • the displacement body has an inclined surface to the tool longitudinal axis. It can then be provided in an adjustable manner in the direction of the tool longitudinal axis adjustable and thereby act on the locking body.
  • the invention also relates to a tool chuck according to claim 21.
  • the figures show an only indicated drilling tool 2, in particular a hammer drill, with a tool chuck 4, which is tool-less (quick-change chuck) on a drive spindle 6 of the drilling tool 2 releasably fastened.
  • the tool chuck comprises a sleeve-shaped radially inner section 8, which can be pushed onto the drive spindle 6.
  • the section 8 is in the axial direction in a front receiving portion 10 for the tool, not shown.
  • openings 12 are provided which allow a partial passage of spherical detent bodies 14 radially inward, but keep this detent body 14 captive in the radial direction.
  • a likewise sleeve-shaped actuating means 16 is provided, which is arranged longitudinally displaceable in the direction of a tool longitudinal axis 18, by virtue of the fact that it has a coaxial with Tool longitudinal axis 18 extending threaded portion 20 is in rotary connection with the sleeve-shaped portion 8.
  • a spring means 22 in the form of a leaf spring 24 is provided.
  • the spring means 22 can be tensioned by an axial abutment surface 26 of the actuating means 16 in the case of axial displacement of the actuating means 16.
  • the spring presses with its abutment surface 26 axially opposite end against a displacement body 28, which acts with an oblique positive displacement surface 30 on the detent body 14 and this seeks to displace radially inward.
  • the axial displacement of the actuating means 16 is, as already mentioned, achieved by rotating the actuating means 16 about the tool longitudinal axis 18 through the threaded connection.
  • the spring means 22 When the actuating means 16 is moved in the direction of a neck 32 of the drilling tool device 2, the spring means 22 is tensioned and thus increases the pressure on the displacement body 28, which in turn forces the locking body 14 against a groove-shaped recess 34 of the drive spindle 6 with increased pressure.
  • the aforementioned components form a locking and release mechanism 36.
  • these components also form a coupling device 37 with a torque adjusting device 38, wherein the sleeve-shaped actuating means 16 forms an actuating member 40 of the torque adjusting device 38.
  • a user grips a front portion 46 and, in contrast, turns the sleeve-shaped actuating means 16 in the release direction until the locking bodies 14 can come free from the groove 34 on the outside of the drive spindle 6 in the radial direction. Then the tool chuck 4 can be removed in the tool longitudinal direction 18.
  • the assembly process takes place in the reverse direction, wherein after establishing an axial positive connection between the drive spindle 6 and tool chuck 4 (first phase of actuation) the sleeve-shaped actuating means 16 is further rotated in positions 44 (second phase of actuation), which then goes hand in hand with a torque adjustment of the above described way.

Abstract

The coupling unit is designed as an overload coupling. The torque at which coupling is released, is predetermined by a torque adjuster (38). Its construction employs components of the locking and release mechanism (36), which include a manually-operated ring casing (16). This casing sets the maximum torque. It is adjusted along the tool longitudinal axis (18) by turning it about this axis. It runs on a thread (20) of the chuck (4) inner casing which surrounds the drive spindle.

Description

Die Erfindung betrifft ein werkzeuglos an einer Antriebsspindel montierbares und abnehmbares Werkzeugfutter, sowie ein Bohrwerkzeuggerät, insbesondere Bohrhammer, mit einem werkzeuglos an einer Antriebsspindel montierbaren und abnehmbaren Werkzeugfutter (Schnellwechselfutter) mit einem manuell bedienbaren Verriegelungs- und Freigabemechanismus für das Werkzeugfutter, und mit einer in das Werkzeugfutter integrierten Kupplungseinrichtung, zur Herbeiführung einer Drehkopplung zwischen der Antriebsspindel und dem Werkzeugfutter. Ein Bohrwerkzeuggerät mit den Merkmalen des Oberbegriffs des Anspruchs 1 und ein Werkzeugfutter mit den Merkmalen des Oberbegriffs des Anspruchs 21 sind aus EP 1236538 bekannt.The invention relates to a tool-less mountable on a drive spindle and removable tool chuck, and a drill tool, in particular hammer drill, with a tool-less on a drive spindle mountable and removable tool chuck (quick-change chuck) with a manually operated locking and release mechanism for the tool chuck, and with a in the Tool chuck integrated clutch device, for bringing about a rotary coupling between the drive spindle and the tool chuck. A drilling tool device having the features of the preamble of claim 1 and a tool chuck having the features of the preamble of claim 21 are made EP 1236538 known.

Ein Bohrwerkzeuggerät der vorstehend genannten Art ist beispielsweise durch den Bohrhammer der Anmelderin des Handelsnamens UHE bekanntgeworden und im Hauptkatalog 2005/2006 vorbeschrieben.A drill tool of the above type has become known for example by the hammer drill of the applicant of the trade name UHE and in the main catalog 2005/2006 described above.

Überlastkupplungen bei Elektrohandwerkzeuggeräten sind beispielsweise durch DE 101 31 220 Cl bekanntgeworden.Overload clutches in electrical hand tool devices are for example by DE 101 31 220 Cl became known.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, Bohrwerkzeuggeräte, insbesondere Bohrhammer, im Hinblick auf eine weitergehende Funktionalität zu verbessern.The object of the present invention is to improve drilling tool devices, in particular rotary hammers, with regard to further functionality.

Diese Aufgabe wird bei einem Bohrwerkzeuggerät der genannten Art erfindungsgemäß dadurch gelöst, dass die Kupplungseinrichtung als Überlastkupplung ausgebildet ist und das Drehmoment, bei dem die Kupplungseinrichtung entkoppelt, über eine Drehmomenteinstelleinrichtung vorgebbar ist.This object is achieved in a drill tool of the type mentioned in the present invention, that the coupling device is designed as overload clutch and the torque at which the coupling device decouples, can be predetermined via a Drehmomenteinstelleinrichtung.

Gerade bei Bohrhämmern erweist es sich als vorteilhaft, wenn Schnellwechselfutter eingesetzt werden können, um beispielsweise ein Hammerfutter für einen Hammer- oder Bohrhammerbetrieb vorhalten und benutzen zu können oder wahlweise ein reines Bohrfutter für einen Bohrbetrieb oder in Verbindung mit Bits für einen Schraubbetrieb auswählen zu können. Die Integration einer Überlastkupplung mit einstellbarem Drehmoment in ein Schnellwechselfutter erhöht die Funktionalität des Werkzeuggeräts und erweist sich insofern als vorteilhaft.Especially with rotary hammers, it proves to be advantageous if quick change chuck can be used to hold and use, for example, a hammer chuck for a hammer or hammer drill operation or to select either a pure drill chuck for a drilling operation or in conjunction with bits for a screwing. The integration of an overload clutch with adjustable torque in a quick-change chuck increases the functionality of the tool device and proves to be advantageous in this respect.

In Weiterbildung der Erfindung wird vorgeschlagen, dass die Drehmomenteinstelleinrichtung von Komponenten des Verriegelungs- und Freigabemechanismus für das Werkzeugfutter gebildet ist. Auf diese Weise kann die Anzahl der Komponenten, die einerseits für die Verwirklichung eines Verriegelungs- und Freigabemechanismus und andererseits für die Ausbildung einer drehmomenteinstellbaren Kupplungseinrichtung verwendet werden müssen, reduziert werden.In a further development of the invention it is proposed that the Drehmomenteinstelleinrichtung is formed by components of the locking and release mechanism for the tool chuck. In this way, the number of components that must be used on the one hand for the realization of a locking and releasing mechanism and on the other hand for the formation of a torque-adjustable coupling device can be reduced.

Es erweist sich als vorteilhaft, wenn der Verriegelungs- und Freigabemechanismus ein manuelles Betätigungsmittel umfasst, das insbesondere hülsenförmig ausgebildet sein kann, welches zugleich das Stellorgan für die Drehmomenteinstelleinrichtung bildet.It proves to be advantageous if the locking and releasing mechanism comprises a manual actuating means, which may be formed in particular sleeve-shaped, which also forms the actuator for the Drehmomenteinstelleinrichtung.

Das manuelle Betätigungsmittel ist vorzugsweise in Richtung einer Werkzeuglängsachse verstellbar. Hierfür könnte ausschließlich eine Längsverschiebbarkeit für das Betätigungsmittel vorgesehen sein; indessen wird vorgeschlagen, dass das manuelle Betätigungsmittel um die Werkzeuglängsachse drehbar und dabei in Richtung der Werkzeuglängsachse verlagerbar ist.The manual actuating means is preferably adjustable in the direction of a tool longitudinal axis. For this purpose, only a longitudinal displacement for the actuating means could be provided; However, it is proposed that the manual actuating means is rotatable about the tool longitudinal axis and thereby displaced in the direction of the tool longitudinal axis.

In Weiterbildung dieses Gedankens erweist es sich als vorteilhaft, wenn das Betätigungsmittel über ein Gewinde auf einem radial inneren hülsenförmigen Abschnitt des Werkzeugfutters sitzt, welches die Antriebsspindel umgreift. Durch diese Ausbildung ist das Betätigungsmittel einerseits drehbar geführt, und es ist andererseits eine entsprechend der Umdrehung gezielte axiale Verlagerbarkeit erreicht.In a further development of this idea, it proves to be advantageous if the actuating means sits on a thread on a radially inner sleeve-shaped portion of the tool chuck, which surrounds the drive spindle. By this design, the actuating means is on the one hand rotatably guided, and it is on the other hand achieved in accordance with the rotation targeted axial displacement.

Des Weiteren erweist es sich als vorteilhaft, wenn der Verriegelungs- und Freigabemechanismus radial verlagerbare Rastkörper, insbesondere Kugeln oder Rollen aufweist, welche das Werkzeugfutter axial mit der Antriebsspindel verbinden. Hierfür werden die Rastkörper in Ausnehmungen in der Antriebsspindel gedrückt, so dass auf diese Weise eine axiale Kopplung erreicht wird und das Werkzeugfutter fest auf der Antriebswelle sitzt.Furthermore, it proves to be advantageous if the locking and release mechanism has radially displaceable locking body, in particular balls or rollers, which connect the tool chuck axially with the drive spindle. For this purpose, the locking body are pressed into recesses in the drive spindle, so that in this way an axial coupling is achieved and the tool chuck is firmly seated on the drive shaft.

Der vorerwähnte hülsenförmige Abschnitt oder auch andere Komponenten des Verriegelungs- und Freigabemechanismus sind dabei so ausgebildet, dass die Rastkörper zwar radial verlagerbar, jedoch nach radial innen unverlierbar im Werkzeugfutter gehalten sind.The aforementioned sleeve-shaped portion or other components of the locking and release mechanism are designed so that the locking body, although radial displaced, but are held captive in the tool chuck radially inwards.

Es erweist sich des Weiteren als vorteilhaft, wenn die Rastkörper nicht nur zur Ausbildung einer axialen Kopplung zwischen Werkzeugfutter und Antriebsspindel dienen, sondern, dass sie zugleich eine Drehkopplung zwischen Antriebsspindel und Werkzeugfutter bewirken, um beispielsweise einen Schlagbohrbetrieb oder einen Bohrhammerbetrieb oder auch einen reinen Bohrbetrieb ausführen zu können.It also proves to be advantageous if the locking body not only serve to form an axial coupling between the tool chuck and drive spindle, but that they also cause a rotational coupling between the drive spindle and tool chuck, for example, perform a percussion drilling or a hammer drill operation or even a pure drilling operation to be able to.

Hierfür wirken die vorzugsweise vorgesehen Rastkörper insbesondere an der Antriebsspindel vorgesehenen Drehmitnahmemitteln zusammen. Hierbei kann es sich um Vertiefungen oder Erhöhungen handeln, die eine Drehmitnahme in Umfangsrichtung bewirken.For this purpose, the locking bodies preferably provided cooperate in particular with rotary driving means provided on the drive spindle. These may be indentations or elevations which bring about rotational drive in the circumferential direction.

Es erweist sich des Weiteren als vorteilhaft, dass die Kraft, mit der die Rastkörper gegen die Antriebsspindel bzw. gegen die Drehmitnahmemittel gedrückt werden, durch das vorausgehend erwähnte Betätigungsmittel des Verriegelungs- und Freigabemechanismus für das Werkzeugfutter einstellbar ist.It also proves to be advantageous that the force with which the locking bodies are pressed against the drive spindle or against the rotary driving means, by the aforementioned actuating means of the locking and releasing mechanism for the tool chuck is adjustable.

In Weiterbildung der Erfindung wird vorgeschlagen, das Bohrwerkzeuggerät so auszubilden, dass beim Montieren des Werkzeugfutters an der Antriebsspindel in einer ersten Phase der Betätigung eine axiale Kopplung zwischen Werkzeugfutter und Antriebsspindel und in einer daran anschließenden weitergehenden zweiten Phase der Betätigung eine Veränderung des Drehmoments der Überlastkupplung bewirkt wird.In a further development of the invention, it is proposed to design the drilling tool device in such a way that when the tool chuck is mounted on the drive spindle in a first phase of the actuation, an axial coupling between the tool chuck and the drive spindle and in a subsequent second phase of the actuation causes a change in the torque of the overload clutch becomes.

Hierfür erweist es sich als vorteilhaft, wenn der Verriegelungs- und Freigabemechanismus einen Verdrängerkörper aufweist, der die Rastkörper gegen die Antriebsspindel drückt. Zum Lösen des Werkzeugfutters wird das Betätigungsmittel dann derart verlagert, dass der Verdrängerkörper aus seiner die Rastkörper gegen die Antriebsspindel drückenden Position gebracht wird oder seinerseits durch eine Verlagerung der Verdrängerkörper infolge einer axialen Bewegung des Futterkörpers nun selbst in Lösestellung verdrängt wird.For this it proves to be advantageous if the locking and release mechanism has a displacement body which presses the locking body against the drive spindle. To release the tool chuck, the actuating means is then displaced such that the displacement body is brought out of its locking body against the drive spindle pushing position or in turn is displaced by a displacement of the displacer due to an axial movement of the chuck body itself in the release position.

Vorteilhafterweise umfasst der Verriegelungs- und Freigabemechanismus ein Federmittel, das auf den Verdrängerkörper einwirkt.Advantageously, the locking and releasing mechanism comprises a spring means which acts on the displacer.

Um eine axiale Kraftbeaufschlagung in eine radiale Verdrängung zu übertragen, erweist es sich als vorteilhaft, wenn der Verdrängerkörper eine zur Werkzeuglängsachse geneigte Fläche aufweist. Er kann dann in vorteilhafter Weise in Richtung der Werkzeuglängsachse verstellbar vorgesehen werden und dabei auf den Rastkörper einwirken.In order to transmit an axial force application in a radial displacement, it proves to be advantageous if the displacement body has an inclined surface to the tool longitudinal axis. It can then be provided in an adjustable manner in the direction of the tool longitudinal axis adjustable and thereby act on the locking body.

Es erweist sich auch als vorteilhaft, dass der Spannungszustand und damit die Federkraft des Federmittels über das Betätigungsmittel einstellbar ist.It also proves to be advantageous that the state of stress and thus the spring force of the spring means on the actuating means is adjustable.

Die Erfindung betrifft außerdem ein Werkzeugfutter nach Anspruch 21.The invention also relates to a tool chuck according to claim 21.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den beigefügten Patentansprüchen und aus der zeichnerischen Darstellung und nachfolgenden Beschreibung einer bevorzugten Ausführungsform des erfindungsgemäßen Bohrwerkzeuggeräts.Further features, details and advantages of the invention will become apparent from the appended claims and from the drawings and the following description of a preferred embodiment of the drilling tool according to the invention.

In der Zeichnung zeigt:

Figur 1
eine schematische teilweise Ansicht eines Bohrwerkzeuggeräts im Bereich des Werkzeugfutters;
Figur 2
eine schematische Schnittansicht des Bohrwerkzeuggeräts nach Figur 1 und
Figur 3
eine schematische Seitenansicht des Bohrwerkzeuggeräts nach Figur 1 zur Verdeutlichung verschiedener Drehstellungen eines Betätigungselements, welche ein Maß für die Drehmomenteinstellung anzeigen sollen.
In the drawing shows:
FIG. 1
a schematic partial view of a drilling tool device in the region of the tool chuck;
FIG. 2
a schematic sectional view of the drilling tool according to FIG. 1 and
FIG. 3
a schematic side view of the drilling tool according to FIG. 1 to illustrate different rotational positions of an actuator, which should indicate a measure of the torque setting.

Die Figuren zeigen ein nur angedeutetes Bohrwerkzeuggerät 2, insbesondere einen Bohrhammer, mit einem Werkzeugfutter 4, welches werkzeuglos (Schnellwechselfutter) an einer Antriebsspindel 6 des Bohrwerkzeuggeräts 2 lösbar befestigbar ist.The figures show an only indicated drilling tool 2, in particular a hammer drill, with a tool chuck 4, which is tool-less (quick-change chuck) on a drive spindle 6 of the drilling tool 2 releasably fastened.

Das Werkzeugfutter umfasst einen hülsenförmigen radial inneren Abschnitt 8, der auf die Antriebsspindel 6 aufschiebbar ist. Der Abschnitt 8 geht in axialer Richtung über in einen vorderen Aufnahmeabschnitt 10 für das nicht dargestellte Werkzeug.The tool chuck comprises a sleeve-shaped radially inner section 8, which can be pushed onto the drive spindle 6. The section 8 is in the axial direction in a front receiving portion 10 for the tool, not shown.

In dem hülsenförmigen Abschnitt 8 sind Öffnungen 12 vorgesehen, die einen teilweisen Durchtritt von kugelförmigen Rastkörpern 14 nach radial innen erlauben, diese Rastkörper 14 jedoch in radialer Richtung unverlierbar halten. Außerhalb des hülsenförmigen Abschnitts 8 ist ein ebenfalls hülsenförmiges Betätigungsmittel 16 vorgesehen, das in Richtung einer Werkzeuglängsachse 18 längsverschieblich angeordnet ist, und zwar dadurch, dass es über einen koaxial zur Werkzeuglängsachse 18 verlaufenden Gewindeabschnitt 20 mit dem hülsenförmigen Abschnitt 8 in Drehverbindung steht. Zwischen dem hülsenförmigen Betätigungsmittel 16 und dem inneren hülsenförmigen Abschnitt 8 ist ein Federmittel 22 in Form einer Blattfeder 24 vorgesehen. Das Federmittel 22 ist bei axialer Verlagerung des Betätigungsmittels 16 durch eine axiale Anschlagsfläche 26 des Betätigungsmittels 16 spannbar. Die Feder drückt mit ihrem der Anschlagsfläche 26 axial gegenüberliegenden Ende gegen einen Verdrängerkörper 28, der mit einer schrägen Verdrängerfläche 30 auf den Rastkörper 14 einwirkt und diesen nach radial innen zu verdrängen sucht. Die axiale Verlagerung des Betätigungsmittels 16 wird, wie bereits erwähnt, durch Drehen des Betätigungsmittels 16 um die Werkzeuglängsachse 18 durch die Gewindeverbindung erreicht. Wenn das Betätigungsmittel 16 in Richtung auf einen Hals 32 des Bohrwerkzeuggeräts 2 bewegt wird, so wird das Federmittel 22 gespannt und damit der Druck auf den Verdrängerkörper 28 erhöht, der seinerseits mit erhöhtem Druck den Rastkörper 14 gegen eine nutförmige Ausnehmung 34 der Antriebsspindel 6 zwingt. Die vorerwähnten Komponenten bilden dabei einen Verriegelungs- und Freigabemechanismus 36. Durch Eingriff des oder der Rastkörper 14 in die Nut 34 an der Außenseite der Antriebsspindel 6 wird ein axialer Formschluss zwischen Werkzeugfutter 4 und Antriebsspindel 6 erreicht. Zugleich bilden diese Komponenten aber auch eine Kupplungseinrichtung 37 mit Drehmomenteinstelleinrichtung 38, wobei das hülsenförmige Betätigungsmittel 16 ein Stellorgan 40 der Drehmomenteinstelleinrichtung 38 bildet. Je weiter das Stellorgan 40 durch Drehen um die Werkzeuglängsachse 18 in Richtung auf den Hals 32 des Bohrwerkzeuggeräts 2 verlagert ist, desto stärker ist das Drehmoment, welches von der Antriebsspindel 6 auf den jeweiligen Rastkörper 14 aufgebracht werden muss, um diesen über noch nicht erwähnte Erhebungen 42 in der Nut 34 gegen die Kraft des Federmittels 22 und unter axialer Verlagerung des Verdrängerkörpers 28 nach radial außen drücken zu können, so dass die Antriebsspindel 6 quasi unter den Rastkörpern 14 hindurchrutscht (Rutschkupplung). Dieses Hindurchrutschen führt jedoch lediglich zu einer Überwindung der Drehkopplung zwischen Werkzeugfutter 4 und Antriebsspindel 6, nicht jedoch zu einer Aufhebung der axialen Kopplung zwischen Werkzeugfutter 4 und Antriebsspindel 6.In the sleeve-shaped portion 8 openings 12 are provided which allow a partial passage of spherical detent bodies 14 radially inward, but keep this detent body 14 captive in the radial direction. Outside the sleeve-shaped portion 8, a likewise sleeve-shaped actuating means 16 is provided, which is arranged longitudinally displaceable in the direction of a tool longitudinal axis 18, by virtue of the fact that it has a coaxial with Tool longitudinal axis 18 extending threaded portion 20 is in rotary connection with the sleeve-shaped portion 8. Between the sleeve-shaped actuating means 16 and the inner sleeve-shaped portion 8, a spring means 22 in the form of a leaf spring 24 is provided. The spring means 22 can be tensioned by an axial abutment surface 26 of the actuating means 16 in the case of axial displacement of the actuating means 16. The spring presses with its abutment surface 26 axially opposite end against a displacement body 28, which acts with an oblique positive displacement surface 30 on the detent body 14 and this seeks to displace radially inward. The axial displacement of the actuating means 16 is, as already mentioned, achieved by rotating the actuating means 16 about the tool longitudinal axis 18 through the threaded connection. When the actuating means 16 is moved in the direction of a neck 32 of the drilling tool device 2, the spring means 22 is tensioned and thus increases the pressure on the displacement body 28, which in turn forces the locking body 14 against a groove-shaped recess 34 of the drive spindle 6 with increased pressure. The aforementioned components form a locking and release mechanism 36. By engagement of the detent body 14 or in the groove 34 on the outside of the drive spindle 6, an axial positive connection between the tool chuck 4 and the drive spindle 6 is achieved. At the same time, however, these components also form a coupling device 37 with a torque adjusting device 38, wherein the sleeve-shaped actuating means 16 forms an actuating member 40 of the torque adjusting device 38. The further the actuator 40 is displaced by rotation about the longitudinal axis of the tool 18 in the direction of the neck 32 of the drilling tool 2, the stronger is the torque which must be applied by the drive spindle 6 to the respective detent body 14 to this about not yet mentioned surveys 42 in the groove 34 against the force of the spring means 22 and under axial displacement of the displacer 28 can be pressed radially outward, so that the drive spindle 6 slips almost under the locking bodies 14 (slipping clutch). However, this slip only leads to overcoming the rotational coupling between the tool chuck 4 and drive spindle 6, but not to a repeal of the axial coupling between the tool chuck 4 and drive spindle. 6

Aus der Darstellung der Figur 3 sind verschiedene Drehstellungen 44 ersichtlich, welche ein Maß für die Drehmomenteinstellung anzeigen sollen.From the representation of FIG. 3 are different rotational positions 44 can be seen, which should indicate a measure of the torque setting.

Zum Lösen des Werkzeugfutters 4 greift ein Benutzer einen vorderen Abschnitt 46 und dreht demgegenüber das hülsenförmige Betätigungsmittel 16 in Löserichtung bis die Rastkörper 14 in radialer Richtung aus der Nut 34 an der Außenseite der Antriebsspindel 6 freikommen können. Dann kann das Werkzeugfutter 4 in Werkzeuglängsrichtung 18 abgenommen werden. Der Montagevorgang erfolgt in umgekehrter Richtung, wobei nach Herstellen eines axialen Formschlusses zwischen Antriebsspindel 6 und Werkzeugfutter 4 (erste Phase der Betätigung) das hülsenförmige Betätigungsmittel 16 weiter gedreht wird in Positionen 44 (zweite Phase der Betätigung), was dann einhergeht mit einer Drehmomenteinstellung der vorstehend beschriebenen Weise.To release the tool chuck 4, a user grips a front portion 46 and, in contrast, turns the sleeve-shaped actuating means 16 in the release direction until the locking bodies 14 can come free from the groove 34 on the outside of the drive spindle 6 in the radial direction. Then the tool chuck 4 can be removed in the tool longitudinal direction 18. The assembly process takes place in the reverse direction, wherein after establishing an axial positive connection between the drive spindle 6 and tool chuck 4 (first phase of actuation) the sleeve-shaped actuating means 16 is further rotated in positions 44 (second phase of actuation), which then goes hand in hand with a torque adjustment of the above described way.

Claims (21)

  1. Drilling tool (2), in particular a hammer drill, comprising a chuck (4) which, without tools, can be mounted on and removed from a drive shaft (6), a manually operable locking and release mechanism (36) for the chuck, and a coupling device (37) integrated into the chuck, in order to create a rotating joint between the drive shaft (6) and the chuck (4), characterised in that the coupling device (37) is formed as an overload clutch, and the torque at which the coupling device (37) uncouples can be specified by means of a torque adjuster (38).
  2. Drilling tool according to claim 1, characterised in that the torque adjuster (38) is formed from components of the locking and release mechanism (36).
  3. Drilling tool according to either claim 1 or claim 2, characterised in that the locking and release device (36) comprises a manual actuation means (16) which also forms the control unit (40) for the torque adjuster (38).
  4. Drilling tool according to claim 3, characterised in that the manual actuation means (16) has the shape of a sleeve.
  5. Drilling tool according to either claim 3 or claim 4, characterised in that the manual actuation means (16) can be adjusted in the direction of a longitudinal axis (18) of the tool.
  6. Drilling tool according to claim 5, characterised in that the manual actuation means (16) can be turned about the longitudinal axis (18) of the tool and can thus be adjusted in the direction of said longitudinal axis (18).
  7. Drilling tool according to claim 6, characterised in that the actuation means (16) sits, via a thread (20), on a radially inner sleeve-shaped portion (8) of the chuck (4), which surrounds the drive shaft (6).
  8. Drilling tool according to one or more of the preceding claims, characterised in that the locking and release mechanism (36) has radially displaceable latching members (14), in particular balls or rollers, which axially connect the chuck (4) to the drive shaft (6).
  9. Drilling tool according to one or more of the preceding claims, characterised in that a sleeve-shaped portion (8) holds the latching members (14), in a radially displaceable but radially inwardly captive manner, in the chuck (4).
  10. Drilling tool according to either claim 8 or claim 9, characterised in that the latching members (14) which connect the chuck (4) axially to the drive shaft (6) also create a rotating joint between drive shaft (6) and chuck (4).
  11. Drilling tool according to one or more of the preceding claims, characterised in that rotational entrainers (42) are provided on the drive shaft (6).
  12. Drilling tool according to one or more of the preceding claims, characterised in that the force with which the latching members (14) are pressed against the drive shaft (6) can be adjusted via the actuation means (16).
  13. Drilling tool according to one or more of the preceding claims, characterised in that when the chuck (4) is mounted on the drive shaft (6), an axial coupling between chuck (4) and drive shaft (6) is created in a first actuation phase, and a change in the torque of the overload clutch is brought about in a subsequently proceeding second actuation phase.
  14. Drilling tool according to one or more of the preceding claims, characterised in that the locking and release mechanism (36) has a displacer member (28) which presses the latching member (14) against the drive shaft (16).
  15. Drilling tool according to claim 14, characterised in that the locking and release mechanism (36) comprises a resilient means (22) which acts on the displacer member (28).
  16. Drilling tool according to either claim 14 or claim 15, characterised in that the displacer member (28) has a surface which is inclined to the longitudinal axis of the tool.
  17. Drilling tool according to claim 14, 15, or 16, characterised in that the displacer member (28) is formed in the shape of a ring.
  18. Drilling tool according to any one of claims 14-17, characterised in that the displacer member (28) can be adjusted in the direction of the longitudinal axis (18) of the tool.
  19. Drilling tool according to any one of claims 15-18, characterised in that the resilient means (22) is a compression spring, in particular a plate spring (24), or a torsion spring.
  20. Drilling tool according to any one of claims 15-19, characterised in that the state of the stresses, and thus the resilient force, of the resilient means (22) can be adjusted via the actuation means (16).
  21. Chuck (4) for a drilling tool, which chuck, without tools, can be mounted on and removed from a drive shaft (6) of a drilling tool, comprising a manually operable locking and release mechanism (36), and a coupling device ( ) integrated into the chuck, in order to create a rotating joint between the drive shaft (6) and the chuck (4), characterised in that the coupling device (37) is formed as an overload clutch, and the torque at which the coupling device (37) uncouples can be specified by means of a torque adjuster (38).
EP05010813A 2005-05-19 2005-05-19 Drilling tool Not-in-force EP1724068B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT05010813T ATE391585T1 (en) 2005-05-19 2005-05-19 DRILLING TOOL EQUIPMENT
DE502005003653T DE502005003653D1 (en) 2005-05-19 2005-05-19 drilling tool
EP05010813A EP1724068B1 (en) 2005-05-19 2005-05-19 Drilling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05010813A EP1724068B1 (en) 2005-05-19 2005-05-19 Drilling tool

Publications (2)

Publication Number Publication Date
EP1724068A1 EP1724068A1 (en) 2006-11-22
EP1724068B1 true EP1724068B1 (en) 2008-04-09

Family

ID=34936665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05010813A Not-in-force EP1724068B1 (en) 2005-05-19 2005-05-19 Drilling tool

Country Status (3)

Country Link
EP (1) EP1724068B1 (en)
AT (1) ATE391585T1 (en)
DE (1) DE502005003653D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111590503A (en) * 2020-06-05 2020-08-28 邹鑫 Pneumatic impact wrench

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006057928A1 (en) * 2006-12-08 2008-06-12 Robert Bosch Gmbh Attachment for a hand tool
DE102008002593A1 (en) * 2008-06-24 2009-12-31 Robert Bosch Gmbh Machine tool with coupling device
DE102008002594A1 (en) * 2008-06-24 2009-12-31 Robert Bosch Gmbh Method for operating a machine tool with a coupling device
CN104416543B (en) * 2013-08-23 2016-08-10 苏州宝时得电动工具有限公司 Electric tool termination connects adnexa and electric tool

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
DE3430530A1 (en) * 1984-08-18 1986-02-27 Helfer & Co KG, 3260 Rinteln Torque limiting device
DE19829960C2 (en) * 1998-07-04 2000-06-21 Norbert Felder Torque limiting device
CA2370981C (en) * 2001-02-14 2009-12-29 Black & Decker Inc. Removable chuck
DE20105763U1 (en) * 2001-04-02 2001-07-19 Roehm Gmbh Drill chuck with a quick coupling
DE10131220C1 (en) * 2001-06-28 2003-03-06 Metabowerke Gmbh Electric handtool with overload coupling reducing torque transmitted between drive shaft of electric drive motor and driven stage when tool is blocked

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111590503A (en) * 2020-06-05 2020-08-28 邹鑫 Pneumatic impact wrench
CN111590503B (en) * 2020-06-05 2021-10-22 郑玲佳 Pneumatic impact wrench

Also Published As

Publication number Publication date
ATE391585T1 (en) 2008-04-15
DE502005003653D1 (en) 2008-05-21
EP1724068A1 (en) 2006-11-22

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