EP1524082B1 - Hand tool - Google Patents

Hand tool Download PDF

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Publication number
EP1524082B1
EP1524082B1 EP04023661A EP04023661A EP1524082B1 EP 1524082 B1 EP1524082 B1 EP 1524082B1 EP 04023661 A EP04023661 A EP 04023661A EP 04023661 A EP04023661 A EP 04023661A EP 1524082 B1 EP1524082 B1 EP 1524082B1
Authority
EP
European Patent Office
Prior art keywords
tool
sleeve
hand tool
drive spindle
tool according
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
EP04023661A
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German (de)
French (fr)
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EP1524082A1 (en
Inventor
Werner Class
Michael Vogel
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
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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
Publication of EP1524082A1 publication Critical patent/EP1524082A1/en
Application granted granted Critical
Publication of EP1524082B1 publication Critical patent/EP1524082B1/en
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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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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

Definitions

  • the invention relates to a hand tool, in particular an electric hand tool, in particular a screwdriver, with a tool holding device for plugging into these tools or tool holding means, in particular tool bits, wherein the tool holding means comprises a securing device with a portion of the inserted tool or tool holding means behind releasably engaging securing element an inserted tool or tool holding means can be secured against unintentional loosening.
  • An electric hand tool device of the type described above has become known under the trade name "USE 8" of the Applicant.
  • this device forms a front End portion of the drive spindle, the tool holder.
  • an axial receiving opening is formed with convincedsechskantquerexcellent, in which a tool bit can be used.
  • a securing device with a ball as a securing element which extends through an opening in the wall of the tool receiving portion of the drive spindle and which is pressed by an outer locking sleeve which is spring biased radially inward and in a rear grip position with the tool bit arrives.
  • an additionally provided depth stop at the front end of the electric hand tool device is removed so that the locking sleeve can be pushed forward and thus the fuse element can pass radially outward in the release position, so that the tool bit removed from the receiving opening at the front end portion of the drive spindle is.
  • the formation of the tool receiving opening as an axial blind hole opening in the drive spindle is expensive.
  • a radial passage opening for the fuse element must be created.
  • Out DE 42 07 337 C1 is a chuck for tool inserts, in particular for screwdrivers, in hand tool devices, known, with a tool holding device for these pluggable tools, wherein the tool holding device comprises a securing device with a securing element which can be tilted against the shaft of an inserted tool by the rigid securing element, by which extends through the shank of the tool, is slightly tilted relative to the shaft.
  • the known tool holding device comprises a sleeve which is biased in an axial direction and comprises the securing device, wherein upon displacement of the sleeve against the bias of the fuse element from its tilted position in a release position is tilted, in which then the inserted tool from the tool holding device can be removed.
  • This known tool holding device is structurally complex, and the tilting of parts against each other encountered in view of the wear occurring considerable concern.
  • DE 100 29 721 A1 discloses a likewise generic screwdriver in which a tool holding means in the form of a bit holder in a corresponding axial receiving opening in a front portion of the drive spindle can be inserted and secured by means of a radially acting securing element. Since the fuse element can be released only by overcoming its bias, the removal of the tool holder also made cumbersome.
  • the present invention has the object to simplify the tool holding device constructively and to release manufacturing moderately from the drive spindle. It should also be comfortable to use.
  • the sleeve also includes the securing device, which can be brought by moving the sleeve in a release or release position in which then the inserted tool or the inserted tool holding means can be pulled out of the tool holder substantially without resistance.
  • the securing element of the securing device when moving the sleeve against the bias from its rear grip position with the tool or tool holding means thereby releasable, that it slides against the outer contour of the inserted tool or tool holding means.
  • the securing element is provided on the inside of the sleeve and displaceable with this in the axial direction. In this way, by the adjusting movement of the axial displacement of the sleeve at the same time as an adjusting movement implementable or usable displacement of the securing element made.
  • the sleeve has on its side facing the tool or tool holding means an opening on the inside for receiving the securing element.
  • the recess is formed concentrically to the longitudinal direction.
  • the securing element can be formed by a radially inwardly biased spring element. It may be a spring ring or a spring washer, which are round or also round and are biased inwards in the radial direction and protrude into the clear cross-sectional area of the receiving opening of the sleeve.
  • the tool holding device such that the securing element cooperates with the outer contour of the inserted into the sleeve tool or tool holding means, that it is in the rear grip position with the tool or tool holding means in axial entrainment with the sleeve.
  • a spring could be provided outside the drive spindle and outside of the sleeve.
  • a spring is provided inside the sleeve, which is supported at one end against an abutment in the front end portion of the drive spindle and the other end against an abutment in the interior of the sleeve. In such case, it proves to be advantageous and easy to produce, when the abutment is formed at the front end portion of the drive spindle of a step on the outer periphery of the front portion of the drive spindle.
  • a gradation on the outer circumference of the drive spindle is easy to produce.
  • the free end of the front end portion of the drive spindle is not used as an abutment for the spring, so it may advantageously form a contact surface for an axial end portion of the tool or tool holder used.
  • the sleeve has an axially extending slot or an elongated hole-shaped, through which a radial projection extends through the drive spindle and the sleeve thereby rotatably, but holds axially displaceable.
  • This projection could be formed or molded in any desired manner. It proves to be easy to produce and thus advantageous if the projection is formed by a transverse to the longitudinal direction in an opening in the front end portion of the drive spindle pin pressed.
  • the sleeve on its outer side a profiling, which favors a rotation in dust removal in the axial and / or radial direction.
  • This profiling can be formed helically in an advantageous manner.
  • FIG. 1 shows an electric hand tool device in the form of a screwdriver, generally designated by the reference numeral 2.
  • a drive spindle 4 and a tool holding device 6 for inserting a tool bit or a further tool holding means for a tool or tool bit into an axial opening 8 of the tool holding device 6 can be seen.
  • the tool holder 6 is surrounded by a depth stop forming member 10 which is detachable in the axial direction of a gear housing 11 of the electric power tool.
  • the tool holding device 6 comprises a sleeve 12 which is placed on a front end portion 14 of the drive spindle 4 can be pushed and there rotatably with the drive spindle 4, but limited axially displaceable to this, is arranged.
  • the sleeve 12 on two diametrically opposite sides, in particular on at least one side, a slot-shaped opening 16 which is extending in the axial direction.
  • a pin 18 is pressed transversely to the axial direction through the slot-shaped opening 16 into a through hole 20 in the front end portion 14 of the drive spindle 4.
  • This pin 18 projects with its two ends 22 in the slot-shaped opening 16 and thus couples the sleeve 12 rotatably, but in the axial direction corresponding to the axial extent of the slot-shaped opening 16 slidably, with the drive spindle. 4
  • the axial opening 8 for receiving the tool bits has an internal hexagonal cross section, which is formed exactly for receiving a corresponding clamping portion 24 of a tool bit 26. Following this, the opening 8 is slightly widened in the direction of the drive spindle 4. In this slightly enlarged portion 28, the drive spindle 4 protrudes with a diameter-reduced portion 30, which forms the free end 32 of the drive spindle 6, a. In this way, a concentric receiving space 34 of a radial depth of one or a few millimeters is formed between the diameter-reduced portion 30 and the diameter-expanded portion 28. In this receiving space 34, a spring 36 is arranged around the diameter-reduced portion 30 of the drive spindle 4 around.
  • the spring 36 is supported at one end against a step 38 at the motor end of the diameter-reduced portion 30 of Drive spindle 4 and the other end on an annular disk-shaped abutment 40 from which is inserted into the widened portion 28 of the opening 8 of the sleeve 12.
  • the sleeve 12 is forced into the position shown in Figures 1 to 4, wherein this position is predetermined by abutment of the ends 22 of the pin 18 against the longitudinal end of the slot-shaped opening 16 in the sleeve 12.
  • a securing device 44 comprises a ring-shaped resilient securing element 46, which in the illustrated case engages in a concentric recess 48 formed on the inside of the opening 8. This concentric through recess 48 is formed in the radial direction so that it is able to completely absorb the annular securing element 46, as shown in FIG. If no tool bit is inserted into the opening 8, the annular securing element 46 protrudes into the clear cross-sectional area of the opening 8. It remains but in axial driving connection with the recess 48.
  • the annular securing element 46 by sliding against a run-on slope 50 at the end of the tool bit 26 in the radial Direction outward into the recess 48 hineinverdrnaturet.
  • the securing element 46 is thus widened so that the clear cross-sectional area of the insertion opening 8 is released and the tool bit 26 can reach the end position shown in FIG. 4 in the direction of the arrow 42.
  • the securing element 46 forms a rear grip position with the outer contour of the tool bit 26, as shown in FIG. It slides over a run-up slope 50 corresponding run-on slope 52 on the outside of the tool bit 26 radially inward into the end position shown in Figure 4. In this position, the tool bit 26 is secured against falling or accidental release.
  • the electric hand tool can be used.
  • the tool bit 26 is supported with a rear end face 54 on the contact surface 32 at the free end of the drive spindle 4.
  • an optionally provided depth stop (see Figure 1 and description thereof) is removed, and the user can then move the sleeve 12 against the tension of the spring 36 in the direction of arrow 42 relative to the drive spindle 4 to the rear.
  • the fuse element 46 is taken; it slides over the aforementioned run-on slope 52 and is thereby displaced radially outward into the concentric recess 48.
  • the rear grip position is released, and in the state shown in Figure 5, the tool bit 26 can be removed almost without resistance from the insertion opening 8 of the sleeve 12.
  • a profiling 56 which is helical and serves a dust removal in the axial direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Drilling And Boring (AREA)

Abstract

The device (2) has a tool holder (6) for insertable tools, especially bits, with a securing device with a securing element with which an inserted tool or tool holding arrangement can be secured against unintentional release. The tool holding device has a sleeve mounted on the leading end of a drive spindle (4) so as to be rotationally fixed to it but with limited axial movement for releasing securing device.

Description

Die Erfindung betrifft ein Handwerkzeuggerät, insbesondere ein Elektrohandwerkzeuggerät, insbesondere einen Schrauber, mit einer Werkzeughalteeinrichtung für in diese einsteckbare Werkzeuge oder Werkzeughaltemittel, insbesondere Werkzeug-Bits, wobei die Werkzeughalteeinrichtung eine Sicherungsvorrichtung mit einem einen Abschnitt des eingesteckten Werkzeugs oder Werkzeughaltemittels lösbar hintergreifenden Sicherungselement aufweist, mittels dessen ein eingestecktes Werkzeug oder Werkzeughaltemittel gegen unbeabsichtigtes Lösen sicherbar ist.The invention relates to a hand tool, in particular an electric hand tool, in particular a screwdriver, with a tool holding device for plugging into these tools or tool holding means, in particular tool bits, wherein the tool holding means comprises a securing device with a portion of the inserted tool or tool holding means behind releasably engaging securing element an inserted tool or tool holding means can be secured against unintentional loosening.

Eine Elektrohandwerkzeuggerät der vorstehend beschriebenen Art ist unter dem Handelsnamen "USE 8" der Anmelderin bekanntgeworden. Bei diesem Gerät bildet ein vorderer Endabschnitt der Antriebsspindel die Werkzeughalteeinrichtung. Dort ist eine axiale Aufnahmeöffnung mit Innensechskantquerschnitt ausgebildet, in die ein Werkzeugbit einsetzbar ist. Es ist ferner eine Sicherungsvorrichtung mit einer Kugel als Sicherungselement vorgesehen, die sich durch eine Öffnung in der Wandung des Werkzeugaufnahmeabschnitts der Antriebsspindel hindurcherstreckt und die von einer äußeren Sicherungshülse, die unter Federvorspannung steht, nach radial innen gedrückt wird und in eine Hintergriffsstellung mit dem eingesetzten Werkzeugbit gelangt. Zum Lösen des Werkzeugbits wird ein zusätzlich vorgesehener Tiefenanschlag am vorderen Ende des Elektrohandwerkzeuggeräts abgenommen, damit die Sicherungshülse nach vorn geschoben werden kann und damit das Sicherungselement nach radial außen in Freigabestellung gelangen kann, so dass das Werkzeugbit mit aus der Aufnahmeöffnung am vorderen Endabschnitt der Antriebsspindel entnehmbar ist.An electric hand tool device of the type described above has become known under the trade name "USE 8" of the Applicant. In this device forms a front End portion of the drive spindle, the tool holder. There, an axial receiving opening is formed with Innensechskantquerschnitt, in which a tool bit can be used. It is further provided a securing device with a ball as a securing element, which extends through an opening in the wall of the tool receiving portion of the drive spindle and which is pressed by an outer locking sleeve which is spring biased radially inward and in a rear grip position with the tool bit arrives. To release the tool bit an additionally provided depth stop at the front end of the electric hand tool device is removed so that the locking sleeve can be pushed forward and thus the fuse element can pass radially outward in the release position, so that the tool bit removed from the receiving opening at the front end portion of the drive spindle is.

Die Ausbildung der Werkzeugaufnahmeöffnung als axiale Sacklochöffnung in der Antriebsspindel ist aufwendig. Außerdem muss eine radiale Durchgangsöffnung für das Sicherungselement geschaffen werden.The formation of the tool receiving opening as an axial blind hole opening in the drive spindle is expensive. In addition, a radial passage opening for the fuse element must be created.

Aus DE 42 07 337 C1 ist ein Spannfutter für Werkzeugeinsätze, insbesondere für Schraubendreher, bei Handwerkzeuggeräten, bekannt, mit einer Werkzeughalteeinrichtung für in diese einsteckbare Werkzeuge, wobei die Werkzeughalteeinrichtung eine Sicherungsvorrichtung mit einem Sicherungselement aufweist, welches gegen den Schaft eines eingesteckten Werkzeugs verkantbar ist, indem das starre Sicherungselement, durch welches sich der Schaft des Werkzeugs hindurcherstreckt, gegenüber dem Schaft geringfügig verkippt wird. Die bekannte Werkzeughalteeinrichtung umfasst eine Hülse, die in einer axialen Richtung vorgespannt ist und die Sicherungsvorrichtung umfasst, wobei bei Verschieben der Hülse entgegen der Vorspannung das Sicherungselement aus seiner verkanteten Stellung in eine Freigabestellung verkippbar ist, in der dann das eingesteckte Werkzeug aus der Werkzeughalteeinrichtung entnehmbar ist. Diese bekannte Werkzeughalteeinrichtung ist konstruktiv aufwendig, und das Verkanten von Teilen gegeneinander begegnet im Hinblick auf den dabei auftretenden Verschleiß erheblichen Bedenken.Out DE 42 07 337 C1 is a chuck for tool inserts, in particular for screwdrivers, in hand tool devices, known, with a tool holding device for these pluggable tools, wherein the tool holding device comprises a securing device with a securing element which can be tilted against the shaft of an inserted tool by the rigid securing element, by which extends through the shank of the tool, is slightly tilted relative to the shaft. The known tool holding device comprises a sleeve which is biased in an axial direction and comprises the securing device, wherein upon displacement of the sleeve against the bias of the fuse element from its tilted position in a release position is tilted, in which then the inserted tool from the tool holding device can be removed. This known tool holding device is structurally complex, and the tilting of parts against each other encountered in view of the wear occurring considerable concern.

DE 100 29 721 A1 offenbart ein ebenfalls gattungsgemäßes Schraubgerät, bei dem ein Werkzeughaltemittel in Form eines Bithalters in eine entsprechende axiale Aufnahmeöffnung in einem vorderen Abschnitt der Antriebsspindel einsteckbar und mittels eines radial wirkenden Sicherungselements sicherbar ist. Da das Sicherungselement nur durch Überwindung seiner Vorspannung lösbar ist, gestaltet sich das Abziehen des Werkzeughalters zudem beschwerlich. DE 100 29 721 A1 discloses a likewise generic screwdriver in which a tool holding means in the form of a bit holder in a corresponding axial receiving opening in a front portion of the drive spindle can be inserted and secured by means of a radially acting securing element. Since the fuse element can be released only by overcoming its bias, the removal of the tool holder also made cumbersome.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, die Werkzeughalteeinrichtung konstruktiv zu vereinfachen und herstellungsmäßig von der Antriebsspindel zu lösen. Sie soll außerdem komfortabler bedienbar sein.Proceeding from this, the present invention has the object to simplify the tool holding device constructively and to release manufacturing moderately from the drive spindle. It should also be comfortable to use.

Diese Aufgabe wird erfindungsgemäße durch ein Elektrohandwerkzeuggerät mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by an electric hand tool with the features of claim 1.

Es wird also erfindungsgemäß vorgeschlagen, von einer Aufnahmeöffnung für das Werkzeug oder ein weiteres Werkzeughaltemittel in einem vorderen Endabschnitt der Antriebsspindel Abstand zu nehmen und stattdessen auf einem vorderen Endabschnitt der Antriebsspindel eine Hülse vorzusehen, die zugleich das Werkzeug oder Werkzeughaltemittel in diese einsteckbar aufnimmt. Die Hülse umfasst zugleich die Sicherungsvorrichtung, die durch Verschieben der Hülse in eine Löse- oder Freigabestellung gebracht werden kann, in der dann das eingesteckte Werkzeug oder das eingesteckte Werkzeughaltemittel im wesentlichen widerstandslos aus der Werkzeughalteeinrichtung herausgezogen werden kann.It is therefore proposed according to the invention to refrain from a receiving opening for the tool or another tool holding means in a front end portion of the drive spindle and instead a sleeve on a front end portion of the drive spindle provide that at the same time receives the tool or tool holding means in this plug-in. The sleeve also includes the securing device, which can be brought by moving the sleeve in a release or release position in which then the inserted tool or the inserted tool holding means can be pulled out of the tool holder substantially without resistance.

Nach der Erfindung ist das Sicherungselement der Sicherungsvorrichtung beim Verschieben der Hülse entgegen der Vorspannung aus seiner Hintergriffstellung mit dem Werkzeug oder Werkzeughaltemittel dadurch lösbar, dass es gegen die Außenkontur des eingesteckten Werkzeugs oder Werkzeughaltemittels aufgleitet.According to the invention, the securing element of the securing device when moving the sleeve against the bias from its rear grip position with the tool or tool holding means thereby releasable, that it slides against the outer contour of the inserted tool or tool holding means.

In weiterer Ausbildung der Erfindung ist das Sicherungselement an der Innenseite der Hülse vorgesehen und mit dieser in axialer Richtung verschiebbar. Auf diese Weise wird durch die Stellbewegung des axialen Verschiebens der Hülse zugleich eine als Stellbewegung umsetzbare oder nutzbare Verlagerung des Sicherungselements vorgenommen.In a further embodiment of the invention, the securing element is provided on the inside of the sleeve and displaceable with this in the axial direction. In this way, by the adjusting movement of the axial displacement of the sleeve at the same time as an adjusting movement implementable or usable displacement of the securing element made.

In weiterer Ausbildung des vorstehenden Erfindungsgedankens weist die Hülse an ihrer dem Werkzeug oder Werkzeughaltemittel zugewandten Innenseite eine zur Innenseite öffnende Ausnehmung zur Aufnahme des Sicherungselements auf.In a further embodiment of the above inventive concept, the sleeve has on its side facing the tool or tool holding means an opening on the inside for receiving the securing element.

Es erweist sich als vorteilhaft, wenn diese Ausnehmung nach radial außen geschlossen, also nur zur Innenseite der Hülse ausgebildet ist. Dies verleiht der Hülse nach außen ein kompaktes Aussehen, und es erweist sich als einfach herstellbar. Außerdem wird kein Raum für das Eindringen von Schmutz in das Innere der Hülse geschaffen.It proves to be advantageous if this recess closed radially outward, that is formed only to the inside of the sleeve. This gives the sleeve a compact appearance to the outside, and it turns out to be easy to manufacture. In addition, no space for the ingress of dirt is created in the interior of the sleeve.

In bevorzugter Weiterbildung dieses Erfindungsgedankens ist die Ausnehmung konzentrisch zur Längsrichtung ausgebildet. Das Sicherungselement kann von einem nach radial innen vorgespannten Federelement gebildet sein. Es kann sich hierbei um einen Federring oder eine Federringscheibe handeln, die rund oder auch unrund ausgebildet und in radialer Richtung nach innen vorgespannt sind und in die lichte Querschnittsfläche der Aufnahmeöffnung der Hülse einragen.In a preferred development of this inventive concept, the recess is formed concentrically to the longitudinal direction. The securing element can be formed by a radially inwardly biased spring element. It may be a spring ring or a spring washer, which are round or also round and are biased inwards in the radial direction and protrude into the clear cross-sectional area of the receiving opening of the sleeve.

In Weiterbildung der Erfindung wird vorgeschlagen, die Werkzeughalteeinrichtung so auszubilden, dass das Sicherungselement derart mit der Außenkontur des in die Hülse eingesteckten Werkzeugs oder Werkzeughaltemittels zusammenwirkt, dass es auch in der Hintergriffsstellung mit dem Werkzeug oder Werkzeughaltemittel in axialer Mitnahme mit der Hülse steht.In a further development of the invention it is proposed to form the tool holding device such that the securing element cooperates with the outer contour of the inserted into the sleeve tool or tool holding means, that it is in the rear grip position with the tool or tool holding means in axial entrainment with the sleeve.

Es wurde eingangs erwähnt, dass die Hülse in axialer Richtung beschränkt gegenüber dem vorderen Endabschnitt der Antriebsspindel verschiebbar ist und dabei vorgespannt ist. Hierfür könnte außerhalb der Antriebsspindel und außerhalb der Hülse eine Feder vorgesehen sein. Es erweist sich indessen als vorteilhaft, wenn im Inneren der Hülse eine Feder vorgesehen ist, die sich einenends gegen ein Widerlager im vorderen Endabschnitt der Antriebsspindel und anderenends gegen ein Widerlager im Inneren der Hülse abstützt. Solchenfalls erweist es sich als vorteilhaft und einfach herstellbar, wenn das Widerlager am vorderen Endabschnitt der Antriebsspindel von einer Abstufung am Außenumfang des vorderen Abschnitts der Antriebsspindel gebildet ist. Eine Abstufung am Außenumfang der Antriebsspindel ist einfach herstellbar. Ebenso könnte das Widerlager im Inneren der Hülse von einer Abstufung im Inneren der Hülse oder von einem in die Hülse einsetzbaren Auflagerelement gebildet sein.It was mentioned in the introduction that the sleeve is limited in the axial direction relative to the front end portion of the drive spindle is displaceable and biased thereby. For this purpose, a spring could be provided outside the drive spindle and outside of the sleeve. However, it proves to be advantageous if a spring is provided inside the sleeve, which is supported at one end against an abutment in the front end portion of the drive spindle and the other end against an abutment in the interior of the sleeve. In such case, it proves to be advantageous and easy to produce, when the abutment is formed at the front end portion of the drive spindle of a step on the outer periphery of the front portion of the drive spindle. A gradation on the outer circumference of the drive spindle is easy to produce. Similarly, the abutment inside the sleeve of a gradation in Be formed inside the sleeve or by a usable in the sleeve bearing element.

Wenn das freie Ende des vorderen Endabschnitts der Antriebsspindel nicht als Widerlager für die Feder benutzt wird, so kann es in vorteilhafter Weise eine Anlagefläche für einen axialen Endabschnitt des eingesetzten Werkzeugs oder Werkzeughalters bilden.If the free end of the front end portion of the drive spindle is not used as an abutment for the spring, so it may advantageously form a contact surface for an axial end portion of the tool or tool holder used.

Um die Hülse in axialer Richtung verschieblich am vorderen Endabschnitt der Antriebsspindel vorzusehen, erweist es sich als vorteilhaft, wenn die Hülse einen axial erstreckten Schlitz oder eine langlochförmige Öffnung aufweist, durch die sich ein radialer Vorsprung an der Antriebsspindel hindurcherstreckt und die Hülse hierdurch drehfest, aber axial verschieblich hält.In order to provide the sleeve in the axial direction displaceable on the front end portion of the drive spindle, it proves to be advantageous if the sleeve has an axially extending slot or an elongated hole-shaped, through which a radial projection extends through the drive spindle and the sleeve thereby rotatably, but holds axially displaceable.

Dieser Vorsprung könnte in an sich beliebiger Weise ausgebildet oder angeformt sein. Es erweist sich als einfach herstellbar und damit vorteilhaft, wenn der Vorsprung durch einen quer zur Längsrichtung in eine Öffnung im vorderen Endabschnitt der Antriebsspindel eingepressten Stift gebildet ist.This projection could be formed or molded in any desired manner. It proves to be easy to produce and thus advantageous if the projection is formed by a transverse to the longitudinal direction in an opening in the front end portion of the drive spindle pin pressed.

In vorteilhafter Weiterbildung des erfindungsgemäßen Werkzeuggeräts weist die Hülse an ihrer Außenseite eine Profilierung auf, die bei Umdrehung eine Staubabfuhr in axialer und/oder radialer Richtung begünstigt. Diese Profilierung kann in vorteilhafter Weise wendelförmig ausgebildet sein.In an advantageous embodiment of the tool according to the invention, the sleeve on its outer side a profiling, which favors a rotation in dust removal in the axial and / or radial direction. This profiling can be formed helically in an advantageous manner.

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 Handwerkzeuggeräts. In der Zeichnung zeigt:

Figur 1
eine teilweise Schnittansicht eines erfindungsgemäßen Elektrohandwerkzeuggeräts;
Figur 2
eine. Seitenansicht einer Antriebsspindel mit Werkzeughalteeinrichtung des Elektrohandwerkzeuggeräts nach Figur 1;
Figur 3
eine teilweise Schnittansicht gesehen in Richtung der Pfeile A-A in Figur 2;
Figur 4
eine Schnittansicht entsprechend Figur 3 mit eingesetztem und gesichertem Werkzeugbit und
Figur 5
eine Schnittansicht entsprechend Figur 4 mit gelöster Sicherungsvorrichtung zum Entnehmen des eingesteckten Werkzeugbits.
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 Hand tool according to the invention. In the drawing shows:
FIG. 1
a partial sectional view of an electric hand tool device according to the invention;
FIG. 2
a. Side view of a drive spindle with tool holding device of the electric hand tool device according to FIG. 1;
FIG. 3
a partial sectional view seen in the direction of the arrows AA in Figure 2;
FIG. 4
a sectional view corresponding to Figure 3 with inserted and secured tool bit and
FIG. 5
a sectional view corresponding to Figure 4 with dissolved securing device for removing the inserted tool bits.

Figur 1 zeigt ein insgesamt mit dem Bezugszeichen 2 bezeichnetes Elektrohandwerkzeuggerät in Form eines Schraubers. Man erkennt eine Antriebsspindel 4 und eine Werkzeughalteeinrichtung 6 zum Einstecken eines Werkzeugbits oder eines weiteren Werkzeughaltemittels für ein Werkzeug oder Werkzeugbit in eine axiale Öffnung 8 der Werkzeughalteeinrichtung 6.FIG. 1 shows an electric hand tool device in the form of a screwdriver, generally designated by the reference numeral 2. A drive spindle 4 and a tool holding device 6 for inserting a tool bit or a further tool holding means for a tool or tool bit into an axial opening 8 of the tool holding device 6 can be seen.

Die Werkzeughalteeinrichtung 6 ist von einem einen Tiefenanschlag bildenden Bauteil 10, welches in axialer Richtung von einem Getriebegehäuse 11 des Elektrohandwerkzeuggeräts lösbar ist, umgeben.The tool holder 6 is surrounded by a depth stop forming member 10 which is detachable in the axial direction of a gear housing 11 of the electric power tool.

Wie aus den Figuren 1 bis 5 ersichtlich ist, umfasst die Werkzeughalteeinrichtung 6 eine Hülse 12, die auf einen vorderen Endabschnitt 14 der Antriebsspindel 4 aufschiebbar und dort drehfest mit der Antriebsspindel 4, jedoch beschränkt axial verschiebbar zu dieser, angeordnet ist. Hierfür weist die Hülse 12 an zwei diametral gegenüberliegenden Seiten, insbesondere an wenigstens einer Seite, eine langlochförmige Öffnung 16 auf, die in axialer Richtung erstreckt ist. Nach dem Aufschieben der Hülse 12 auf den vorderen Endabschnitt 14 der Antriebsspindel 4 ist ein Stift 18 quer zur axialen Richtung durch die langlochförmige Öffnung 16 hindurch in eine Durchgangsöffnung 20 im vorderen Endabschnitt 14 der Antriebsspindel 4 eingepresst. Dieser Stift 18 ragt mit seinen beiden Enden 22 in die langlochförmige Öffnung 16 und koppelt somit die Hülse 12 drehfest, jedoch in axialer Richtung entsprechend der axialen Erstreckung der langlochförmigen Öffnung 16 verschieblich, mit der Antriebsspindel 4.As can be seen from FIGS. 1 to 5, the tool holding device 6 comprises a sleeve 12 which is placed on a front end portion 14 of the drive spindle 4 can be pushed and there rotatably with the drive spindle 4, but limited axially displaceable to this, is arranged. For this purpose, the sleeve 12 on two diametrically opposite sides, in particular on at least one side, a slot-shaped opening 16 which is extending in the axial direction. After sliding the sleeve 12 on the front end portion 14 of the drive spindle 4, a pin 18 is pressed transversely to the axial direction through the slot-shaped opening 16 into a through hole 20 in the front end portion 14 of the drive spindle 4. This pin 18 projects with its two ends 22 in the slot-shaped opening 16 and thus couples the sleeve 12 rotatably, but in the axial direction corresponding to the axial extent of the slot-shaped opening 16 slidably, with the drive spindle. 4

Die axiale Öffnung 8 zur Aufnahme des Werkzeugbits weist einen Innensechskantquerschnitt auf, der exakt zur Aufnahme eines entsprechenden Klemmabschnitts 24 eines Werkzeugbits 26 ausgebildet ist. Hieran anschließend ist die Öffnung 8 geringfügig erweitert in Richtung auf die Antriebsspindel 4. In diesen geringfügig erweiterten Abschnitt 28 ragt die Antriebsspindel 4 mit einem durchmesserverringerten Abschnitt 30, welcher das freie Ende 32 der Antriebsspindel 6 bildet, ein. Auf diese Weise ist zwischen dem durchmesserverringerten Abschnitt 30 und dem durchmessererweiterten Abschnitt 28 ein konzentrischer Aufnahmeraum 34 einer radialen Tiefe von einem oder wenigen Millimetern gebildet. In diesem Aufnahmeraum 34 ist eine Feder 36 um den durchmesserverringerten Abschnitt 30 der Antriebsspindel 4 herum angeordnet. Die Feder 36 stützt sich einenends gegen eine Abstufung 38 am motorseitigen Ende des durchmesserverringerten Abschnitts 30 der Antriebsspindel 4 und anderenends an einem ringscheibenförmigen Widerlager 40 ab, welches in den erweiterten Abschnitt 28 der Öffnung 8 der Hülse 12 eingesetzt ist. Auf diese Weise wird die Hülse 12 in die in den Figuren 1 bis 4 dargestellte Stellung gezwungen, wobei diese Stellung durch Anschlag der Enden 22 des Stifts 18 gegen das Längsende der langlochförmigen Öffnung 16 in der Hülse 12 vorgegeben ist. Durch manuelles Ausüben eines Zugs auf die Hülse 12 in axialer Richtung und in Richtung des Pfeils 42 in Figur 3 ist die Hülse 12 gegenüber der Antriebsspindel 4 und entgegen der Kraft der Feder 36 zurückbewegbar bis die Hülse 12 gegen einen Ringbund 43 der Antriebsspindel 4 und/oder der Stift 18 an das andere Längsende der langlochförmigen Öffnung 16 anschlägt (Figur 5).The axial opening 8 for receiving the tool bits has an internal hexagonal cross section, which is formed exactly for receiving a corresponding clamping portion 24 of a tool bit 26. Following this, the opening 8 is slightly widened in the direction of the drive spindle 4. In this slightly enlarged portion 28, the drive spindle 4 protrudes with a diameter-reduced portion 30, which forms the free end 32 of the drive spindle 6, a. In this way, a concentric receiving space 34 of a radial depth of one or a few millimeters is formed between the diameter-reduced portion 30 and the diameter-expanded portion 28. In this receiving space 34, a spring 36 is arranged around the diameter-reduced portion 30 of the drive spindle 4 around. The spring 36 is supported at one end against a step 38 at the motor end of the diameter-reduced portion 30 of Drive spindle 4 and the other end on an annular disk-shaped abutment 40 from which is inserted into the widened portion 28 of the opening 8 of the sleeve 12. In this way, the sleeve 12 is forced into the position shown in Figures 1 to 4, wherein this position is predetermined by abutment of the ends 22 of the pin 18 against the longitudinal end of the slot-shaped opening 16 in the sleeve 12. By manually applying a train on the sleeve 12 in the axial direction and in the direction of arrow 42 in Figure 3, the sleeve 12 against the drive spindle 4 and against the force of the spring 36 is moved back until the sleeve 12 against a collar 43 of the drive spindle 4 and / or the pin 18 abuts against the other longitudinal end of the slot-shaped opening 16 (FIG. 5).

Eine Sicherungsvorrichtung 44 umfasst ein im dargestellten Fall ringförmiges federndes Sicherungselement 46, welches in eine konzentrische Ausnehmung 48, die an der Innenseite der Öffnung 8 ausgebildet ist, eingreift. Diese konzentrisch durchgehende Ausnehmung 48 ist in radialer Richtung so ausgebildet, dass sie das ringförmige Sicherungselement 46, so wie dies in Figur 5 dargestellt ist, ganz aufzunehmen vermag. Wenn kein Werkzeugbit in die Öffnung 8 eingesetzt ist, so ragt das ringförmige Sicherungselement 46 in die lichte Querschnittsfläche der Öffnung 8 ein. Es bleibt dabei aber in axialer Mitnahmeverbindung mit der Ausnehmung 48. Wird nun in Richtung des Pfeils 42 (Figur 3) ein Werkzeugbit in die Öffnung 8 eingesetzt, so wird das ringförmige Sicherungselement 46 durch Aufgleiten gegen eine Anlaufschräge 50 am Ende des Werkzeugbits 26 in radialer Richtung nach außen in die Ausnehmung 48 hineinverdrängt. Das Sicherungselement 46 wird also geweitet, so dass die lichte Querschnittsfläche der Einstecköffnung 8 freigegeben und das Werkzeugbit 26 in Richtung des Pfeils 42 in die in Figur 4 dargestellte Endposition gelangen kann. In dieser Endposition bildet das Sicherungselement 46 eine Hintergriffsstellung mit der Außenkontur des Werkzeugbits 26 aus, so wie dies in Figur 4 dargestellt ist. Es gleitet dabei über eine der Anlaufschräge 50 entsprechende Anlaufschräge 52 an der Außenseite des Werkzeugbits 26 nach radial innen in die in Figur 4 dargestellte Endposition. In dieser Position ist das Werkzeugbit 26 gegen Herausfallen oder unbeabsichtigtes Lösen gesichert. Das Elektrohandwerkzeuggerät kann benutzt werden. Hierbei stützt sich das Werkzeugbit 26 mit einer hinteren Stirnseite 54 an der Anlagefläche 32 am freien Ende der Antriebsspindel 4 ab.A securing device 44 comprises a ring-shaped resilient securing element 46, which in the illustrated case engages in a concentric recess 48 formed on the inside of the opening 8. This concentric through recess 48 is formed in the radial direction so that it is able to completely absorb the annular securing element 46, as shown in FIG. If no tool bit is inserted into the opening 8, the annular securing element 46 protrudes into the clear cross-sectional area of the opening 8. It remains but in axial driving connection with the recess 48. If now in the direction of arrow 42 (Figure 3) a tool bit inserted into the opening 8, the annular securing element 46 by sliding against a run-on slope 50 at the end of the tool bit 26 in the radial Direction outward into the recess 48 hineinverdrängt. The securing element 46 is thus widened so that the clear cross-sectional area of the insertion opening 8 is released and the tool bit 26 can reach the end position shown in FIG. 4 in the direction of the arrow 42. In this end position, the securing element 46 forms a rear grip position with the outer contour of the tool bit 26, as shown in FIG. It slides over a run-up slope 50 corresponding run-on slope 52 on the outside of the tool bit 26 radially inward into the end position shown in Figure 4. In this position, the tool bit 26 is secured against falling or accidental release. The electric hand tool can be used. Here, the tool bit 26 is supported with a rear end face 54 on the contact surface 32 at the free end of the drive spindle 4.

Zum Lösen des Werkzeugbits 26 wird ein gegebenenfalls vorgesehener Tiefenanschlag (vgl. Figur 1 und Beschreibung hierzu) abgenommen, und der Benutzer kann dann die Hülse 12 entgegen der Spannung der Feder 36 in Richtung des Pfeils 42 relativ zur Antriebsspindel 4 nach hinten bewegen. Hierbei wird das Sicherungselement 46 mitgenommen; es gleitet über die erwähnte Anlaufschräge 52 auf und wird dabei nach radial außen in die konzentrische Ausnehmung 48 verdrängt. Somit wird die Hintergriffsstellung gelöst, und in dem in Figur 5 dargestellten Zustand kann das Werkzeugbit 26 nahezu widerstandslos aus der Einstecköffnung 8 der Hülse 12 entnommen werden.For releasing the tool bit 26, an optionally provided depth stop (see Figure 1 and description thereof) is removed, and the user can then move the sleeve 12 against the tension of the spring 36 in the direction of arrow 42 relative to the drive spindle 4 to the rear. Here, the fuse element 46 is taken; it slides over the aforementioned run-on slope 52 and is thereby displaced radially outward into the concentric recess 48. Thus, the rear grip position is released, and in the state shown in Figure 5, the tool bit 26 can be removed almost without resistance from the insertion opening 8 of the sleeve 12.

Des Weiteren erkennt man insbesondere aus Figur 2 an der Außenseite der Hülse 12 eine Profilierung 56, die wendelförmig ausgebildet ist und einer Staubabfuhr in axialer Richtung dient.Furthermore, it can be seen in particular from Figure 2 on the outside of the sleeve 12, a profiling 56 which is helical and serves a dust removal in the axial direction.

Claims (15)

  1. Hand tool, in particular a power hand tool, comprising a tool holding device (6) for tools (26) or tool holding means, in particular tool bits, which can be inserted therein, the tool holding device (6) having securing means (44) comprising a securing element (46) which releasably engages from behind a portion of the inserted tool or tool holding means and by means of which an inserted tool (26) or tool holding means can be secured against accidental release, characterised in that the tool holding device (6) has a sleeve (12) which directly accommodates the tool (26) or the tool holding means in a non-rotational manner and which is arranged on a leading end portion (14) of the drive spindle (4) so as to be non-rotational but axially displaceable in a restricted manner, and in that the sleeve (12) is pre-tensioned in an axial direction and comprises the securing means (44), and in that, by displacing the sleeve (12) against the pre-tension, the securing means (44) can be released and the inserted tool (26) or tool holding means can be removed from the sleeve (12) and in that, when the sleeve (12) is displaced against the pre-tension, the securing element (46) of the securing means (44) can be released from the rear engagement position thereof with the tool (26) or tool holding means by sliding up against the outer contour of the inserted tool (26) or tool holding means.
  2. Hand tool according to claim 1, characterised in that the securing element (46) is provided on the inner side of the sleeve (12) and can be displaced with said sleeve in the axial direction.
  3. Hand tool according to either claim 1 or claim 2, characterised in that the sleeve (12), on the inner side thereof facing the tool (26) or tool holding means, has a recess (48) opening inwards for receiving the securing element (46).
  4. Hand tool according to claim 3, characterised in that the recess (48) is closed radially outwards.
  5. Hand tool according to either claim 3 or claim 4, characterised in that the recess (48) is formed so as to be concentric to the longitudinal direction.
  6. Hand tool according to any one of the preceding claims, characterised in that the securing element (46) is formed by a spring element radially pre-tensioned inwards.
  7. Hand tool according to one or more of the preceding claims, characterised in that the securing element (46) cooperates with the outer contour of the tool (26) or tool holding means inserted in the sleeve (12) such that it is also in a rear engagement position axially entrained with the sleeve (12).
  8. Hand tool according to one or more of the preceding claims, characterised in that, in the interior of the sleeve (12) there is provided a spring (36) which is supported at one end against a counter-bearing at the leading end portion of the drive spindle (4) and at the other end against a counter-bearing in the interior of the sleeve (12).
  9. Hand tool according to claim 8, characterised in that the counter-bearing on the leading portion of the drive spindle (4) is formed by a stepped portion (38) on the outer periphery of the leading end portion of the drive spindle (4).
  10. Hand tool according to either claim 8 or claim 9, characterised in that the counter-bearing in the interior of the sleeve (12) is formed by a stepped portion in the interior of the sleeve or by a support element (40) inserted in the sleeve.
  11. Hand tool according to one or more of the preceding claims, characterised in that the free end (38) of the leading end portion (14) of the drive spindle (4) forms a contact surface for an axial end portion (54) of the tool (26) or tool holder.
  12. Hand tool according to one or more of the preceding claims, characterised in that the sleeve (12) bas a slit extending axially or a slot-shaped opening (16) through which a radial projection extends and thus holds the sleeve (12) so as to be non-rotational but axially displaceable.
  13. Hand tool according to claim 12, characterised in that the projection is formed by a pin (18) embedded in an opening (20) transversely to the longitudinal direction in the leading end portion (14) of the drive spindle (4).
  14. Hand tool according to one or more of the preceding claims, characterised in that the sleeve (12) has on the outer side thereof a profile (56) which favours dust removal in the axial and/or radial direction during rotation.
  15. Hand tool according to claim 14, characterised in that the profile (56) is spiral-shaped.
EP04023661A 2003-10-16 2004-10-05 Hand tool Not-in-force EP1524082B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10348057A DE10348057B3 (en) 2003-10-16 2003-10-16 Hand tool unit, especially electric tool, has holding device with sleeve mounted on leading drive spindle end to be rotationally fixed to it but with limited axial movement to release securing device
DE10348057 2003-10-16

Publications (2)

Publication Number Publication Date
EP1524082A1 EP1524082A1 (en) 2005-04-20
EP1524082B1 true EP1524082B1 (en) 2007-12-12

Family

ID=33441833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04023661A Not-in-force EP1524082B1 (en) 2003-10-16 2004-10-05 Hand tool

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Country Link
EP (1) EP1524082B1 (en)
AT (1) ATE380629T1 (en)
DE (2) DE10348057B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5073321B2 (en) 2007-03-07 2012-11-14 株式会社マキタ Bit setting device for rotary tools
TW201244886A (en) * 2011-05-06 2012-11-16 Hou-Fei Hu Fast-releasing screwdriver transmission shaft

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538675A1 (en) * 1985-10-31 1987-05-07 Werner Hermann Wera Werke SCREWDRIVER INSERT
DE4207337C1 (en) * 1992-03-07 1993-06-09 Helfer & Co Kg, 3260 Rinteln, De
US5233892A (en) * 1992-10-09 1993-08-10 Roberts Peter M Quick release mechanism for tools such as socket wrenches
DE10029721A1 (en) * 2000-06-16 2001-12-20 Hilti Ag Screw driving tool has detachable dust-repelling sleeve arranged between depth stop and bit holder, and selectively coupled with bit holder
DE10306590B4 (en) * 2002-03-08 2011-04-14 Bobby Hu Combination of a first article and a retaining ring for holding a second object

Also Published As

Publication number Publication date
ATE380629T1 (en) 2007-12-15
DE10348057B3 (en) 2004-12-16
EP1524082A1 (en) 2005-04-20
DE502004005685D1 (en) 2008-01-24

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