EP1346800B1 - Tool for a hand machine tool - Google Patents
Tool for a hand machine tool Download PDFInfo
- Publication number
- EP1346800B1 EP1346800B1 EP03005708A EP03005708A EP1346800B1 EP 1346800 B1 EP1346800 B1 EP 1346800B1 EP 03005708 A EP03005708 A EP 03005708A EP 03005708 A EP03005708 A EP 03005708A EP 1346800 B1 EP1346800 B1 EP 1346800B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- rotary
- tool shank
- shank
- locking means
- 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.)
- Expired - Lifetime
Links
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 2
- 238000009527 percussion Methods 0.000 claims 1
- 238000010009 beating Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
- B25D17/084—Rotating chucks or sockets
- B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/003—Details relating to chucks with radially movable locking elements
- B25D2217/0034—Details of shank profiles
Definitions
- the invention relates to a tool for a hand tool with beating and / or drilling function with the features of the preamble of Claim 1.
- a tool for a hand tool is known with a beating and / or drilling function (EP 0 739 267 B1), in which on the circumference of the tool shank axial locking and three rotary driving substantially uniform are arranged distributed.
- the axial locking opposite rotational drive has a Expansion in such a way that in this rotational drive and a locking roller can intervene. This rotational drive is therefore also simultaneously as axial locking available.
- the tool shank of this tool is also too compatible with such known tool holders, in which the Rotary drive and axial locking by two diametrically opposed, cylindrical locking rollers is accomplished.
- the teaching is based on the problem, a tool for a hand tool with beating and / or drilling function, if possible Universal in tool holders of different design for hand tool machines different manufacturers can be used and yet one long service life of both the tool and, in particular, the tool holder the hand tool ensures.
- the teaching of the invention solves the problem previously described in a tool with the features of the preamble of claim 1 by the features of the characterizing part of claim 1.
- What is essential is the symmetrical Design of the three rotary driving and the adaptation of the external dimensions the three rotational loads on the axial lock.
- the invention is recognized been that one for the axial locking of the tool in the tool holder only one Axialvemegelung needed.
- One possibly at the tool holder opposite arranged locking roller can certainly remain functionless. It only has to be in a rotary drive located here can arrange on the tool shank so that no jamming occur.
- Fig. 1 shows a tool for a hand tool with beating and / or drilling function, in particular for a drill, a Impact drill, a hammer drill and another similar working Striker.
- This tool has a circular cross-section tool shank 1 with a working end with cutting plate and conveyor spiral, in Fig. 1, not shown, and with a male end 2, shown in Fig. 1, for insertion in a tool holder on the power tool.
- the insertion end 2 of the tool shank 1 first makes the axial locking of the tool in the tool holder, so that the tool from the tool holder of Hand tool in locked position can not fall out, moreover and in particular then the transmission of the torque from the hand tool on the tool while machining a workpiece.
- the insertion end 2 of the tool shank 1 is initially a Axialverriegelung 3. As shown in FIG. 2, the insertion end 2 is also a Group of three rotary actions 4, 5, 6. The axial lock 3 and the rotary drive 4, 5, 6 are on the circumference of the tool shank 1 substantially arranged evenly distributed.
- the Axialverriegelung 3 is as axially extending, to the end of the tool shaft 1 out closed, circular arc-shaped trough executed.
- the rotary drive 4, 5, 6 are axially extending, towards the end of the tool shank 1 open, approximately trapezoidal grooves in the tool shank 1 executed.
- the three rotational actions 4, 5, 6 are symmetrical to each each radial center line executed.
- the three rotary driving 4, 5, 6 on the circumference of the tool shank 1 substantially the same width as the axial lock 3 on.
- the three rotary driving 4, 5, 6 point in the respective center radially at least the same depth as the axial lock. 3 on.
- the illustrated and preferred embodiment shows in so far a again preferred embodiment, for which applies that the depth slightly larger is the depth of the axial lock 3rd
- Fig. 2 it can be seen that here and after preferred Execution of the arc of the Axialverriegelung 3 forming trough a Radius of about 2/3 to 3/4 of the radius of the tool shank 1 has. To Corresponds here that the depth of the axial lock 3 about 40% to 50% the radius of the tool shank 1 is. This is the appropriate immersion depth a locking roller in the tool shank 1 described.
- FIG. 2 in so far as a preferred design is provided as that the adjacent flanks 7 of adjacent rotational drives 4, 5; 5, 6 parallel to each other run. This gives an optimization of between the Rotary actions 4, 5, 6 and the axial locking 3 standing rotational driving strips.
- the two edges 7 of the trapezoidal rotational drive 4; 5; 6; lie on radii of a circular sector whose center 8 between the bottom 9 of the rotary drive 4; 5; 6 and the center 10 of Tool shaft 1 is located.
- the of the respective rotational drive 4; 5; 6 formed circular sector can be one have different width.
- the illustrated embodiment shows that here preferably an angle of about 90 ° (center angle to the center 8) is included
- the center 8 of the circular sector is about 1/4 of the Radius of the tool shank 1, calculated from the center 10 of the tool shank 1 radially outward.
- the illustrated and preferred embodiment finally shows a Construction characterized in that in a circumferential direction seen front edge 7 of a rotary driving groove 4; 5 with the rear edge. 7 the following rotary driving groove 5; 6 is aligned.
- the two flanks 7; 7 of the two Rotary driving grooves 4; 5 and 5, respectively; 6 lie in a plane parallel to a the longitudinal axis of the tool shank 1 enclosing plane lies.
- the illustrated and preferred embodiment of a tool is in particular can be used appropriately for small diameters of the tool shank, preferably diameter of the tool shank of about 10 mm. In the illustrated Embodiment would then be the depth of the rotary driving groove 4; 5; 6 at about 2.4 mm to 2.5 mm.
- one Embodiment of the tool according to the invention characterized is that the metal material of the tool at least in the region of the insertion end, in particular in the region of the flanks 7 of the rotary driving 4, 5, 6, tough composed and / or adjusted. At the very worst, it bends one Bar, the tool becomes unusable. But the material of the bar breaks not gone, because it is tough and not brittle compounded or set. The tool holder on the hand tool remains undamaged.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Boring (AREA)
- Jigs For Machine Tools (AREA)
Abstract
Description
Die Erfindung betrifft ein Werkzeug für eine Handwerkzeugmaschine mit schlagender
und/oder bohrender Funktion mit den Merkmalen des Oberbegriffs von
Anspruch 1.The invention relates to a tool for a hand tool with beating
and / or drilling function with the features of the preamble of
Seit Jahrzehnten ist man bemüht, das Zusammenwirken von auswechselbaren Werkzeugen mit Handwerkzeugmaschinen mit schlagender und/oder bohrender Funktion, also Bohrmaschinen, Schlagbohrmaschinen, Bohrhämmern und anderen Geräte ähnlicher Funktion zu optimieren. Seit Jahrzehnten ist dabei ein Werkzeug - und ein entsprechender Werkzeughalter an der Handwerkzeugmaschine - bekannt, bei dem der Werkzeugschaft zwei einander diametral gegenüberliegende, zum Ende hin offen ausmündende Drehmitnahmen sowie rechtwinklig dazu zwei einander diametral gegenüberliegende beidseitig geschlossene Axialverriegelungen aufweist. Die Werkzeugaufnahme der Werkzeugmaschine ist dementsprechend mit zwei in die Drehmitnahmen eingreifenden leistenförmigen Drehmitnehmern und mit zwei radial verschiebbaren, mit den Axialverriegelungen zusammenwirkenden Verriegelungskörpern, insbesondere in Form von Verriegelungswalzen, versehen. Während die in die Drehmitnahmen eingreifenden Drehmitnehmer für die Übertragung des Drehmoments von der Handwerkzeugmaschine auf das Werkzeug verantwortlich sind, dienen die in die endseitig geschlossenen Axialverriegelungen am Werkzeugschaft eingreifenden Walzen der axialen Halterung des Werkzeugs in der Werkzeugaufnahme.For decades one endeavors, the interaction of interchangeable ones Tools with hand tools with beating and / or drilling Function, ie drills, impact drills, hammer drills and others To optimize devices of similar function. For decades is one Tool - and a corresponding tool holder on the hand tool known, in which the tool shank two diametrically opposed, open at the end open outward rotational movements and at right angles to two diametrically opposite closed on both sides Has axial locks. The tool holder of the machine tool is accordingly with two engaging in the rotary driving strip-shaped Rotary and with two radially displaceable, with the Axialverriegelungen interacting locking bodies, in particular in the form of Locking rollers, provided. While the engaging in the rotary drive Rotary driver for the transmission of torque from the power tool are responsible for the tool, which serve in the end closed Axialverriegelungen engaging the tool shank rollers the axial support of the tool in the tool holder.
An die axiale Verriegelung werden in belastungsmäßiger Hinsicht keine großen Anforderungen gestellt. Hingegen wirken auf die Drehmitnehmer an der Werkzeugaufnahme aufgrund des zu übertragenden Drehmomentes erhebliche Kräfte ein. Auf der einen Seite sind zu schwach dimensionierte Drehmitnehmer nicht in der Lage, Drehmomente erheblicher Größe zu übertragen, auf der anderen Seite führen stärker dimensionierte Drehmitnehmer aufgrund der dazu erforderlichen größeren Drehmitnahmen zu einer solchen Schwächung des Werkzeugschafts, daß Brüche auftreten können.At the axial locking are in load terms no large Requirements made. On the other hand act on the rotary driver on the tool holder due to the torque to be transmitted considerable forces one. On the one hand too weakly dimensioned rotary drivers are not in able to transmit torques of considerable size, on the other hand lead larger-sized rotary driver due to the required greater torque to such weakening of the tool shank, that breaks can occur.
In Ansehung der Tatsache, daß offensichtlich mit den zuvor bekannten symmetrischen Ausführungen mit einander jeweils diametral gegenüberliegenden, gleich dimensionierten Drehmitnehmern und Axialverriegelungen kein optimaler Kompromiß gefunden werden konnte, sind eine Vielzahl anderer Vorschläge für die Gestaltung des Werkzeugschafts von derartigen Werkzeugen gemacht worden.In view of the fact that obviously with the previously known symmetrical Versions with each other diametrically opposite, Equally dimensioned rotary drivers and Axialverriegelungen not optimal Compromise could be found are a variety of other proposals for the design of the tool shank has been made by such tools.
Antrieb für Veränderungen am Werkzeugschaft des Werkzeugs bzw. an der Werkzeugaufnahme der Handwerkzeugmaschine sind aber nicht nur technische Aspekte. Kaufmännisch kommt hinzu, daß jeder Hersteller von Handwerkzeugmaschinen gerne seine spezielle Gestaltung des Werkzeugschafts haben möchte um sicherzustellen, daß die teuren Verschleißteile, nämlich die Werkzeuge, auch nur von ihm passend für seine Handwerkzeugmaschinen gekauft werden. Dabei ist stets darauf geachtet worden, daß die Drehmitnahmen an dem Werkzeug und die entsprechenden Drehmitnehmer an der Werkzeugaufnahme der Handwerkzeugmaschine zur optimalen Übertragung des Drehmomentes möglichst gleichmäßig beansprucht werden.Drive for changes to the tool shank of the tool or on the Tool holder of the power tool but are not just technical Aspects. Commercially comes that every manufacturer of hand tools would like to have his special design of the tool shank to ensure that the expensive wearing parts, namely the tools, too only to be bought by him fitting for his hand tool machines. there Care has always been taken that the rotary driving on the tool and the corresponding rotary driver on the tool holder of the power tool for optimal transmission of torque as evenly as possible be claimed.
Es hat immer wieder Bestrebungen gegeben, ein universell für Handwerkzeugmaschinen verschiedener Hersteller und damit für unterschiedlich gestaltete Werkzeugaufnahmen geeignetes Werkzeug zu gestalten. Diese Bemühungen haben bislang nicht zu einem überzeugenden Ergebnis geführt.There have always been efforts, a universal for hand tools from different manufacturers and thus for differently designed To make tool holders suitable tool. These efforts have so far not led to a convincing result.
Bekannt ist ein Werkzeug für eine Handwerkzeugmaschine mit schlagender und/oder bohrender Funktion (EP 0 739 267 B1), bei dem auf dem Umfang des Werkzeugschafts eine Axialverriegelung und drei Drehmitnahmen im wesentlichen gleichmäßig verteilt angeordnet sind. Die der Axialverriegelung gegenüberliegende Drehmitnahme hat allerdings eine Aufweitung dergestalt, daß in diese Drehmitnahme auch eine Verriegelungswalze eingreifen kann. Diese Drehmitnahme ist also gleichzeitig auch als Axialverriegelung nutzbar. Der Werkzeugschaft dieses Werkzeugs ist also auch zu solchen, an sich bekannten Werkzeugaufnahmen kompatibel, bei denen die Drehmitnahme und Axialverriegelung durch jeweils zwei einander diametral gegenüberliegende, zylinderförmige Verriegelungswalzen bewerkstelligt wird. A tool for a hand tool is known with a beating and / or drilling function (EP 0 739 267 B1), in which on the circumference of the tool shank axial locking and three rotary driving substantially uniform are arranged distributed. However, the axial locking opposite rotational drive has a Expansion in such a way that in this rotational drive and a locking roller can intervene. This rotational drive is therefore also simultaneously as axial locking available. The tool shank of this tool is also too compatible with such known tool holders, in which the Rotary drive and axial locking by two diametrically opposed, cylindrical locking rollers is accomplished.
Das bekannte Werkzeug für eine Handwerkmaschine, von dem die Erfindung ausgeht (US 5,529,445 A), ist wie das zuvor erläuterte Werkzeug auch zu solchen, an sich bekannten Werkzeugaufnahmen kompatibel, bei denen die Drehmitnahme und die Axialverriegelung durch jeweils einander diametral gegenüberliegende, zylinderförmige Verriegelungswalzen bewerkstelligt werden. Bei diesem bekannten Werkzeug ist es allerdings bereits so, daß die drei Drehmitnahmen, die gemeinsam mit der Axialverriegelung auf dem Umfang des Werkzeugschafts im wesentlichen gleichmäßig verteilt angeordnet sind, ebenso wie die Axialverriegelung jeweils symmetrisch zur jeweiligen radialen Mittellinie ausgeführt sind. Diese drei Drehmitnahmen sind alle drei unterschiedlich breit und haben in der jeweiligen Mitte radial eine unterschiedliche Tiefe, die aber stets geringer ist als die Tiefe der Axialverriegelung. The well-known tool for a craft machine from which the invention proceeds (US Pat. No. 5,529,445 A), like the tool explained above, is also known per se Tool holders compatible, where the rotational drive and the axial lock by each diametrically opposed, cylindrical Locking rollers are accomplished. It is with this known tool However, already so that the three rotary driving, in common with the Axialverriegelung distributed substantially evenly on the circumference of the tool shank are arranged, as well as the Axialverriegelung each symmetrical to the respective Radial center line are executed. These three rotary actions are all three different wide and have a different depth radially in each center, but which is always less than the depth of the Axialverriegelung.
Der Lehre liegt das Problem zugrunde, ein Werkzeug für eine Handwerkzeugmaschine mit schlagender und/oder bohrender Funktion anzugeben, das möglichst universell in Werkzeugaufnahmen unterschiedlicher Gestaltung für Handwerkzeugmaschinen unterschiedlicher Hersteller einsetzbar ist und dennoch eine hohe Standzeit sowohl des Werkzeugs als auch, insbesondere, der Werkzeugaufnahme der Handwerkzeugmaschine gewährleistet.The teaching is based on the problem, a tool for a hand tool with beating and / or drilling function, if possible Universal in tool holders of different design for hand tool machines different manufacturers can be used and yet one long service life of both the tool and, in particular, the tool holder the hand tool ensures.
Die Lehre der Erfindung löst das zuvor dargestellte Problem bei einem Werkzeug
mit den Merkmalen des Oberbegriffs von Anspruch 1 durch die Merkmale
des kennzeichnenden Teils von Anspruch 1. Wesentlich ist die symmetrische
Ausgestaltung der drei Drehmitnahmen und die Anpassung der äußeren Maße
der drei Drehmitnahmen an die Axialverriegelung. Erfindungsgemäß ist erkannt
worden, daß man für die axiale Verriegelung des Werkzeugs in der Werkzeugaufnahme
nur eine Axialvemegelung benötigt. Eine eventuell an der Werkzeugaufnahme
gegenüberliegend angeordnete Verriegelungswalze kann durchaus
funktionslos bleiben. Sie muß sich nur in einer hier befindlichen Drehmitnahme
am Werkzeugschaft so anordnen können, daß keine Verklemmungen auftreten.The teaching of the invention solves the problem previously described in a tool
with the features of the preamble of
Die gleiche Breite der beiden anderen, wiederum einander gegenüberliegenden Drehmitnahmen und die Anpassung an die Breite der Axialverriegelung hat zur Folge, daß viele am Markt befindliche Werkzeugaufnahmen von Handwerkzeugmaschinen mit diesem Werkzeugschaft kompatibel sind. Tatsächlich befinden sich nämlich Drehmitnehmer an den Werkzeugaufnahmen der Handwerkzeugmaschinen immer in dem von den Drehmitnahmen in diesem Bereich überdeckten Abschnitt. Je nach Werkzeugaufnahme der Handwerkzeugmaschine ist die drehmomentübertragende Flanke der einen oder der anderen Drehmitnahme, manchmal auch von zwei Drehmitnahmen für die Übertragung des Drehmoments auf das Werkzeug verantwortlich. Überraschenderweise hat sich gezeigt, daß diese Übertragung von Drehmoment auch bei hohen Belastungen und leistungsstarken Handwerkzeugzeugmaschinen ausreicht.The same width of the other two, again opposite each other Tightening and adaptation to the width of the axial locking has to Consequence that many on-market tool holders of hand tools compatible with this tool shank. Actually located namely, rotary drivers on the tool holders of the power tool machines always in that covered by the rotary driving in this area Section. Depending on the tool holder of the power tool is the torque-transmitting edge of one or the other rotary drive, sometimes also of two torque transmittances responsible for the tool. Surprisingly, it has been shown that this transfer of torque even at high loads and powerful Hand tools machines sufficient.
Bevorzugte Ausgestaltungen und Weiterbildungen der Lehre sind Gegenstand
der Unteransprüche. Besondere Bedeutung kommt dabei der Ausgestaltung der
Ansprüche 5 bis 7 zu. Preferred embodiments and further developments of the teaching are the subject
the dependent claims. Particular importance is attached to the design of the
Im folgenden wird die Erfindung anhand einer nur ein bevorzugtes Ausführungsbeispiel darstellenden Zeichnung näher beschrieben. In der Zeichnung zeigt
- Fig. 1
- in einer Ansicht das Einsteckende des Werkzeugsschafts eines erfindungsgemäßen Werkzeugs und
- Fig. 2
- einen Schnitt gemäß II in Fig. 1.
- Fig. 1
- in a view of the insertion of the tool shank of a tool according to the invention and
- Fig. 2
- a section according to II in Fig. 1st
Fig. 1 zeigt ein Werkzeug für eine Handwerkzeugmaschine mit schlagender
und/oder bohrender Funktion, insbesondere also für eine Bohrmaschine, eine
Schlagbohrmaschine, einen Bohrhammer und ein anderes ähnlich arbeitendes
Schlaggerät. Dieses Werkzeug hat einen im Querschnitt kreisförmigen Werkzeugschaft
1 mit einem Arbeitsende mit Schneidplatte und Förderwendel, in Fig.
1 nicht gezeigt, und mit einem Einsteckende 2, in Fig. 1 gezeigt, zum Einstecken
in eine Werkzeugaufnahme an der Handwerkzeugmaschine. Das Einsteckende 2
des Werkzeugschafts 1 leistet zunächst die axiale Verriegelung des Werkzeugs in
der Werkzeugaufnahme, so daß das Werkzeug aus der Werkzeugaufnahme der
Handwerkzeugmaschine in verriegelter Stellung nicht herausfallen kann, überdies
und insbesondere dann die Übertragung des Drehmoments von der Handwerkzeugmaschine
auf das Werkzeug während der Bearbeitung eines Werkstücks.Fig. 1 shows a tool for a hand tool with beating
and / or drilling function, in particular for a drill, a
Impact drill, a hammer drill and another similar working
Striker. This tool has a circular
Am Einsteckende 2 des Werkzeugschafts 1 befindet sich zunächst eine Axialverriegelung
3. Wie Fig. 2 zeigt, befindet sich am Einsteckende 2 außerdem eine
Gruppe von drei Drehmitnahmen 4, 5, 6. Die Axialverriegelung 3 und die Drehmitnahmen
4, 5, 6 sind auf dem Umfang des Werkzeugschafts 1 im wesentlichen
gleichmäßig verteilt angeordnet.At the
Die Axialverriegelung 3 ist als axial verlaufende, zum Ende des Werkzeugschafts
1 hin geschlossene, kreisbogenförmige Mulde ausgeführt. Die Drehmitnahmen
4, 5, 6 sind als axial verlaufende, zum Ende des Werkzeugschafts 1 hin
offene, etwa trapezförmige Nuten im Werkzeugschaft 1 ausgeführt. Wie Fig. 2
gut erkennen läßt, sind die drei Drehmitnahmen 4, 5, 6 jeweils symmetrisch zur
jeweiligen radialen Mittellinie ausgeführt. Dabei weisen die drei Drehmitnahmen
4, 5, 6 auf dem Umfang des Werkzeugschafts 1 im wesentlichen dieselbe Breite
wie die Axialverriegelung 3 auf. Die drei Drehmitnahmen 4, 5, 6 weisen in der
jeweiligen Mitte radial mindestens dieselbe Tiefe wie die Axialverriegelung 3
auf. Das dargestellte und bevorzugte Ausführungsbeispiel zeigt insoweit eine
nochmals bevorzugte Ausführung, für die gilt, daß die Tiefe geringfügig größer
ist als die Tiefe der Axialverriegelung 3.The Axialverriegelung 3 is as axially extending, to the end of the
Betrachtet man ferner Fig. 2, so erkennt man, daß hier und nach bevorzugter
Ausführung der Kreisbogen der die Axialverriegelung 3 bildenden Mulde einen
Radius von etwa 2/3 bis 3/4 des Radius des Werkzeugschafts 1 aufweist. Dazu
korrespondiert hier, daß die Tiefe der Axialverriegelung 3 etwa 40 % bis 50 %
des Radius des Werkzeugschafts 1 beträgt. Damit ist die zweckmäßige Eintauchtiefe
einer Verriegelungswalze in den Werkzeugschaft 1 beschrieben.Looking further Fig. 2, it can be seen that here and after preferred
Execution of the arc of the
Weiter zeigt Fig. 2 insoweit eine bevorzugte Gestaltung als vorgesehen ist, daß
die benachbarten Flanken 7 benachbarter Drehmitnahmen 4, 5; 5, 6 parallel zueinander
verlaufen. Dadurch erhält man eine Optimierung der zwischen den
Drehmitnahmen 4, 5, 6 und der Axialverriegelung 3 stehenbleibenden Drehmitnahmeleisten.Further, Fig. 2 in so far as a preferred design is provided as that
the
Ferner ist vorgesehen, daß die beiden Flanken 7 der trapezförmigen Drehmitnahme
4; 5; 6; auf Radien eines Kreissektors liegen, dessen Mittelpunkt 8 zwischen
dem Boden 9 der Drehmitnahme 4; 5; 6 und dem Mittelpunkt 10 des
Werkzeugschafts 1 liegt.It is further provided that the two
Der von der jeweiligen Drehmitnahme 4; 5; 6 gebildete Kreissektor kann eine
unterschiedliche Breite haben. Das dargestellte Ausführungsbeispiel zeigt, daß
hier bevorzugt ein Winkel von etwa 90° (Mittelpunktswinkel zum Mittelpunkt 8)
eingeschlossen wirdThe of the respective
Vorzugsweise liegt der Mittelpunkt 8 des Kreissektors dabei bei etwa 1/4 des
Radius des Werkzeugschafts 1, gerechnet vom Mittelpunkt 10 des Werkzeugschafts
1 radial nach außen.Preferably, the center 8 of the circular sector is about 1/4 of the
Radius of the
Das dargestellte und bevorzugte Ausführungsbeispiel zeigt schließlich noch eine
Konstruktion, die dadurch gekennzeichnet ist, daß die in einer Umfangsrichtung
gesehen vordere Flanke 7 einer Drehmitnahmenut 4; 5 mit der hinteren Flanke 7
der folgenden Drehmitnahmenut 5; 6 fluchtet. Die beiden Flanken 7; 7 der beiden
Drehmitnahmenuten 4; 5 bzw. 5; 6 liegen also in einer Ebene, die parallel zu
einer die Längsachse des Werkzeugschafts 1 einschließenden Ebene liegt.The illustrated and preferred embodiment finally shows a
Construction characterized in that in a circumferential direction
seen
Das dargestellte und bevorzugte Ausführungsbeispiel eines Werkzeugs ist insbesondere
für kleine Durchmesser des Werkzeugschafts zweckmäßig einsetzbar,
vorzugsweise Durchmesser des Werkzeugschafts von etwa 10 mm. Im dargestellten
Ausführungsbeispiel läge dann die Tiefe der Drehmitnahmenut 4; 5; 6
bei etwa 2,4 mm bis 2,5 mm.The illustrated and preferred embodiment of a tool is in particular
can be used appropriately for small diameters of the tool shank,
preferably diameter of the tool shank of about 10 mm. In the illustrated
Embodiment would then be the depth of the
Um zu verhindern, daß die die Flanken 7 der Drehmitnahmen 4, 5, 6 bildenden,
vorstehenden Leisten des Werkzeugschafts 1 bei der ggf. auftretenden asymmetrischen
oder auch nur einseitigen Belastung wegbrechen, empfiehlt sich eine
Ausgestaltung des erfindungsgemäßen Werkzeugs, die dadurch gekennzeichnet
ist, daß der Metallwerkstoff des Werkzeugs zumindest im Bereich des Einsteckendes,
insbesondere im Bereich der Flanken 7 der Drehmitnahmen 4, 5, 6, zäh
zusammengesetzt und/oder eingestellt ist. Äußerstenfalls verbiegt damit eine solche
Leiste, das Werkzeug wird unbrauchbar. Das Material der Leiste bricht aber
nicht weg, weil es zäh und nicht spröde zusammengesetzt bzw. eingestellt ist.
Die Werkzeugaufnahme an der Handwerkzeugmaschine bleibt unbeschädigt.In order to prevent that the
Claims (10)
- Tool for a hand-held power tool with a percussion and/or drilling function,
having a tool shank (1) of circular cross section and with a work end and with an insertion end (2) for insertion into a tool receptacle on the hand-held power tool,
an axial locking means (3) and three rotary drivers (4, 5, 6) being distributed substantially uniformly on the circumference at the insertion end (2), the axial locking means (3) being configured as an axially extending recess in the tool shank (1) which is closed towards the end of the tool shank, and the rotary drivers (4, 5, 6) being configured as axially extending approximately trapezoidal grooves in the tool shank (1) which are open towards the end of the tool shank (1), and the three rotary drivers (4, 5, 6) each being configured symmetrically with respect to the respective radial centre line,
characterized in that the three rotary drivers (4, 5, 6) have substantially the same width on the circumference of the tool shank (1) as the axial locking means (3), and
in that the three rotary drivers (4, 5, 6) have radially at least the same depth in the respective centre as the axial locking means (3). - Tool according to Claim 1, characterized in that the three rotary drivers (4, 5, 6) have radially a slightly greater depth in the respective centre than the axial locking means (3).
- Tool according to Claim 1 or 2, characterized in that the circular arc of the recess which forms the axial locking means (3) has a radius of approximately from 2/3 to 3/4 of the radius of the tool shank (1), and/or in that the depth of the axial locking means (3) is approximately from 40% to 50% of the radius of the tool shank (1).
- Tool according to one of Claims 1 to 3, characterized in that the adjacent flanks (7) of adjacent rotary drivers (4, 5; 5, 6) extend parallel to one another.
- Tool according to one of Claims 1 to 4, characterized in that the two flanks (7) of a trapezoidal rotary driver (4; 5; 6) lie on radii of a sector of a circle, the centre point (8) of which lies between the bottom (9) of the rotary driver (4; 5; 6) and the centre point (10) of the tool shank (1).
- Tool according to Claim 5, characterized in that the sector of a circle which is formed by the respective rotary driver (4; 5; 6) encloses an angle of approximately 90°.
- Tool according to Claim 5 or 6, characterized in that the centre point (8) of the sector of a circle lies at approximately 1/4 of the radius of the tool shank (1).
- Tool according to one of Claims 1 to 7, characterized in that the front flank (7) (as seen in a circumferential direction) of a rotary driver (4; 5) is aligned with the rear flank (7) of the following rotary driver (5; 6).
- Tool according to one of Claims 1 to 8, characterized in that the tool shank (1) has a diameter of approximately 10 mm.
- Tool according to one of Claims 1 to 9, characterized in that the metallic material of the tool is assembled and/or set to be stiff, at least in the region of the insertion end, in particular in the region of the flanks (7) of the rotary drivers (4, 5, 6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20204416U | 2002-03-19 | ||
| DE20204416U DE20204416U1 (en) | 2002-03-19 | 2002-03-19 | Tool for a hand machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1346800A1 EP1346800A1 (en) | 2003-09-24 |
| EP1346800B1 true EP1346800B1 (en) | 2005-07-13 |
Family
ID=7969166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03005708A Expired - Lifetime EP1346800B1 (en) | 2002-03-19 | 2003-03-13 | Tool for a hand machine tool |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1346800B1 (en) |
| AT (1) | ATE299419T1 (en) |
| AU (1) | AU2003201352B2 (en) |
| DE (2) | DE20204416U1 (en) |
| ES (1) | ES2244847T3 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2650134A1 (en) * | 1976-10-30 | 1978-05-11 | Bosch Gmbh Robert | TOOL SHAFT |
| DE4200643A1 (en) * | 1992-01-13 | 1993-07-15 | Hilti Ag | IMPACT DRILLING TOOLS AND CHISELING TOOLS FOR THESE TOOLS |
| DK30592D0 (en) * | 1992-03-06 | 1992-03-06 | Joran Bor A S | DRILLING |
| DE4341970A1 (en) * | 1993-12-09 | 1995-06-14 | Hilti Ag | Tool and tool holder for hand tools |
| DE4400969A1 (en) * | 1994-01-14 | 1995-07-20 | Bosch Gmbh Robert | Device on hand-held machine tools for turning tools |
| EP0739267B1 (en) * | 1994-01-14 | 2001-03-14 | Robert Bosch Gmbh | Device on hand machine tools for rotary tool drive |
| DE4403303A1 (en) * | 1994-02-03 | 1995-08-10 | Hilti Ag | Tool and tool holder for hand tools |
-
2002
- 2002-03-19 DE DE20204416U patent/DE20204416U1/en not_active Expired - Lifetime
-
2003
- 2003-03-13 ES ES03005708T patent/ES2244847T3/en not_active Expired - Lifetime
- 2003-03-13 AT AT03005708T patent/ATE299419T1/en not_active IP Right Cessation
- 2003-03-13 EP EP03005708A patent/EP1346800B1/en not_active Expired - Lifetime
- 2003-03-13 DE DE50300744T patent/DE50300744D1/en not_active Expired - Fee Related
- 2003-03-18 AU AU2003201352A patent/AU2003201352B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| ATE299419T1 (en) | 2005-07-15 |
| ES2244847T3 (en) | 2005-12-16 |
| AU2003201352B2 (en) | 2007-01-25 |
| DE50300744D1 (en) | 2005-08-18 |
| DE20204416U1 (en) | 2002-07-11 |
| AU2003201352A1 (en) | 2003-10-16 |
| EP1346800A1 (en) | 2003-09-24 |
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