EP0581726B1 - Tool and chuck for a portable tool - Google Patents
Tool and chuck for a portable tool Download PDFInfo
- Publication number
- EP0581726B1 EP0581726B1 EP19930810479 EP93810479A EP0581726B1 EP 0581726 B1 EP0581726 B1 EP 0581726B1 EP 19930810479 EP19930810479 EP 19930810479 EP 93810479 A EP93810479 A EP 93810479A EP 0581726 B1 EP0581726 B1 EP 0581726B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flank
- tool
- drive
- longitudinal extent
- groove
- 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
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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
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- 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 insertion into a tool holder for chiselling and / or impact drilling hand tool devices with a clamping shank which has at least one axially closed locking groove and at least one rotational driving groove open axially towards the free end of the clamping shaft with two essentially radially extending flanks.
- the clamping shank of these tools having one or two axially closed locking grooves and one or two rotational driving grooves open axially towards the free end of the clamping shaft.
- the tool holder which serves to hold these tools, has, according to the number of locking grooves, radially displaceable locking elements, which in the present case are designed in the form of balls.
- these locking elements which can also be designed as cylinders, for example, ensure that the tools do not fall out of the tool holder.
- the locking elements can be moved radially in such a way that they disengage from the locking grooves.
- the aforementioned locking grooves, together with the locking elements interacting with them, are not subject to particularly high stresses, since in operation the tool located in the tool holder is practically floating relative to the locking elements, ie the locking elements, in cooperation with the locking grooves, do not have to transmit any significant forces during operation. Only when the tool is pulled out of a hole in a component do the locking grooves, in cooperation with the locking elements, ensure the connection between the tool and the tool holder.
- the turning driver grooves which are open axially towards the free end of the clamping shank and in which corresponding driver bars of the tool holder engage, are subject to extremely high stress.
- these rotary driving grooves are responsible for the entire torque transmission during the operation of the tool.
- the invention has for its object to provide a tool which is particularly wear-resistant in cooperation with a suitable tool holder that reliable torque transmission is guaranteed.
- the object is achieved in that the area of the driving-side flank of the rotary driving groove is larger in its projection in the circumferential direction than the corresponding area of the opposite flank.
- the dimensioning of the rotary driving groove proposed according to the invention leads to an optimal compromise between increasing the transmission surface of the rotating driving groove which is decisive for the torque transmission and avoiding a cross-sectional weakening which has a detrimental effect on the strength of the tool.
- the term projection in the circumferential direction expresses that the decisive factor for the torque transmission is the ultimately resulting, essentially radial surface, which for example coincides with a radius when the flanks are straight, provided the flanks run radially.
- the fact that only the flank on the driving side is enlarged in its area means that there is no appreciable cross-sectional weakening of the clamping shank, which has a negative effect on the strength of the tool.
- a simple possibility of increasing the area of the flank on the driving side expediently consists in the radial dimension of this flank on the driving side of the rotary driving groove being greater than the radial dimension of the opposite flank.
- the radial dimension of the flank on the driving side corresponds approximately to 1.1 to 1.5 times the radial dimension of the opposite flank.
- flanks on the driving side advantageously exceeds the longitudinal extent of the opposite flank.
- the flanks are therefore of unequal length, which leads to a rear wall of the rotary driving groove which is inclined with respect to the circumference of the clamping shaft.
- the longitudinal extent of the flank on the driving side preferably corresponds to 1.05 to 1.3 times the longitudinal extent of the opposite flank.
- a respective paired arrangement of locking grooves and rotary driving grooves is provided, with rotary driving grooves and locking grooves expediently being approximately diametrically opposed to one another.
- the tool holder provided for holding these tools is provided with at least one radially displaceable locking element and at least one driving bar, the driving-side flank of the driving bar having a surface which is larger in projection in the circumferential direction than the corresponding surface of the opposite flank .
- the area of the driving bar which is decisive for the torque transmission is thereby increased, which on the one hand leads to a reduction in wear and on the other hand enables the driving bars to be made stronger and therefore less susceptible to destruction.
- the radial dimension of the flank of the driving bar on the driving side is greater than the radial dimension of the flank on the opposite side
- the longitudinal extent of the flank of the driving bar on the driving side be greater than the longitudinal dimension of the opposite flank.
- the dimensions of the surfaces of the flank on the driving side can be increased within the scope of the tool, ie the radial dimension of the flank on the driving side can be 1.1 to 1.5 times the radial dimension of the flank on the opposite side and the longitudinal extent of the flank on the driving side can be 1.05. correspond to 1.3 times the length of the opposite flank.
- FIG. 1 and 2 show a clamping shank 1 of a tool according to the invention.
- This clamping shaft 1 has two axially closed locking grooves 2 and two rotational driving grooves 3 which are open axially towards the free end of the clamping shaft 1.
- FIG. 2 shows in particular, flanks 3a, 3b of the rotary driving grooves 3 run essentially radially.
- the area of the flank 3a on the driving side is larger than the area of the opposite flank 3b, which is caused by an increase in the radial dimension at the flank 3a.
- FIG. 3 and 4 show a clamping shank 4 of a further embodiment of the tool according to the invention.
- This clamping shaft 4 is provided with two axially closed locking grooves 5 and two rotational driving grooves 6 which are open axially towards the free end of the clamping shaft 4.
- the rotary driving grooves 6 have essentially radially extending flanks 6a, 6b, as is particularly illustrated in FIG. 4.
- the flanks 6a on the driving side of the rotary driving grooves 6 have a larger area than the opposite flanks 6b, which is due to the greater longitudinal extent of the flanks 6a on the driving side compared to the longitudinal extent of the opposite flanks 6b.
- a tool holder is shown schematically, in which the tool according to Fig. 1 is inserted with the holding shaft 1, locking grooves 2 and driving grooves 3.
- the tool holder has a guide 7, an actuating sleeve 8 and a cage 9 surrounding the actuating sleeve 8.
- recesses By displacing the actuating sleeve 8 either axially or in the circumferential direction, recesses (not shown) can be made in the radial projection of locking elements 10, so that these locking elements 10 can yield. This means that the locking elements 10 can disengage from the locking grooves 2 and thereby release the clamping shank 1, so that the tool can be removed from the guide 7 and thus from the tool holder.
- the guide 7 has driving bars 7a which are provided with essentially radially extending flanks 7b, 7c.
- the flank 7b on the entraining side has a larger area than the opposite flank 7c, which in the present example comes about by increasing the radial dimension.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
Die Erfindung betrifft ein Werkzeug zum Einsetzen in eine Werkzeugaufnahme für dem Meisseln und/oder Schlagbohren dienende Handwerkzeuggeräte mit einem Einspannschaft, der mindestens eine axial geschlossene Verriegelungsnut und mindestens eine axial zum freien Ende des Einspannschaftes hin offene Drehmitnahmenut mit zwei im wesentlichen radial verlaufenden Flanken aufweist.The invention relates to a tool for insertion into a tool holder for chiselling and / or impact drilling hand tool devices with a clamping shank which has at least one axially closed locking groove and at least one rotational driving groove open axially towards the free end of the clamping shaft with two essentially radially extending flanks.
Aus der DE-PS 25 51 125 sind Werkzeuge für Handwerkzeuggeräte bekannt, wobei der Einspannschaft dieser Werkzeuge eine oder zwei axial geschlossene Verriegelungsnuten sowie eine oder zwei axial zum freien Ende des Einspannschaftes hin offene Drehmitnahmenuten aufweist. Die Werkzeugaufnahme, welche der Aufnahme dieser Werkzeuge dient, weist entsprechend der Anzahl Verriegelungsnuten radial verschiebbare Verriegelungselemente auf, welche im vorliegenden Falle in Form von Kugeln ausgebildet sind. Diese Verriegelungselemente, welche beispielsweise auch als Zylinder ausgebildet sein können, dienen im Zusammenwirken mit den axial geschlossenen Verriegelungsnuten dazu, dass die Werkzeuge nicht aus der Werkzeugaufnahme herausfallen. Zum Entnehmen der Werkzeuge lassen sich die Verriegelungselemente derart radial verschieben, dass sie aus den Verriegelungsnuten ausrücken.From DE-PS 25 51 125 tools for hand tools are known, the clamping shank of these tools having one or two axially closed locking grooves and one or two rotational driving grooves open axially towards the free end of the clamping shaft. The tool holder, which serves to hold these tools, has, according to the number of locking grooves, radially displaceable locking elements, which in the present case are designed in the form of balls. In cooperation with the axially closed locking grooves, these locking elements, which can also be designed as cylinders, for example, ensure that the tools do not fall out of the tool holder. To remove the tools, the locking elements can be moved radially in such a way that they disengage from the locking grooves.
Besonders hohe Beanspruchungen kommen den vorgenannten Verriegelungsnuten samt den damit zusammenwirkenden Verriegelungselementen nicht zu, da im Betrieb das sich in der Werkzeugaufnahme befindliche Werkzeug gegenüber den Verriegelungselementen praktisch schwimmend gelagert ist, dh die Verriegelungselemente haben im Zusammenwirken mit den Verriegelungsnuten im Betrieb keine nennenswerten Kräfte zu übertragen. Lediglich beim Herausziehen des Werkzeuges aus einer Bohrung in einem Bauteil haben die Verriegelungsnuten im Zusammenwirken mit dem Verriegelungselementen die Verbindung zwischen Werkzeug und Werkzeugaufnahme sicherzustellen.The aforementioned locking grooves, together with the locking elements interacting with them, are not subject to particularly high stresses, since in operation the tool located in the tool holder is practically floating relative to the locking elements, ie the locking elements, in cooperation with the locking grooves, do not have to transmit any significant forces during operation. Only when the tool is pulled out of a hole in a component do the locking grooves, in cooperation with the locking elements, ensure the connection between the tool and the tool holder.
Eine ausserordentlich hohe Beanspruchung kommt dagegen den axial zum freien Ende des Einspannschaftes hin offenen Drehmitnahmenutenen zu, in welche entsprechende Mitnahmeleisten der Werkzeugaufnahme eingreifen. Diese Drehmitnahmenuten sind in Verbindung mit den Mitnahmeleisten für die gesamte Drehmomentübertragung während des Betriebs des Werkzeuges verantwortlich.On the other hand, the turning driver grooves, which are open axially towards the free end of the clamping shank and in which corresponding driver bars of the tool holder engage, are subject to extremely high stress. In conjunction with the drive bars, these rotary driving grooves are responsible for the entire torque transmission during the operation of the tool.
Im Zusammenhang mit den weit verbreiteten Werkzeugen entsprechend vorgenannter Veröffentlichung hat sich gezeigt, dass die Schwäche im Verschleiss der Drehmitnahmenuten liegt. Insbesondere tritt an der mitnahmeseitigen Flanke, dh an jener Flanke, welche in Drehrichtung vorgelagert, aber abgewandt ist, ein ausserordentlich hoher Verschleiss im Zusammenwirken mit den entsprechenden Mitnahmeleisten der Werkzeugaufnahme auf. Ausschlaggebend für diesen Verschleiss sind einerseits die hohen zu übertragenden Drehmomente, andererseits aber auch die laufende Relativversetzung der Flanken der Drehmitnahmenuten gegenüber den Flanken der Mitnahmeleisten. Diese Relativversetzung wird durch die Einwirkung der Schlagbeanspruchung auf das Werkzeug hervorgerufen. Der Verschleiss hat zur Folge, dass die Drehmitnahmenuten bei einem Werkzeug so stark ausgeschlagen werden, dass eine zuverlässige Drehmomentübertragung schon vor der eigentlichen betriebsbedingten Abnutzung des Arbeitsbereiches des Werkzeuges eintritt, was zwangsläufig zu einem kostspieligen Ersatz eines solchen Werkzeuges führen muss.In connection with the widespread tools according to the aforementioned publication, it has been shown that the weakness lies in the wear of the rotary driving grooves. In particular, on the flank on the driving side, ie on the flank which is upstream but facing away, an extraordinarily high level of wear occurs in cooperation with the corresponding driving bars of the tool holder. Decisive for this wear are, on the one hand, the high torques to be transmitted, but on the other hand, the ongoing relative displacement of the flanks of the rotary driving grooves with respect to the flanks of the driving bars. This relative displacement is caused by the impact of the impact stress on the tool. As a result of the wear, the rotary driving grooves on a tool are deflected so strongly that reliable torque transmission occurs before the actual operational wear of the working area of the tool, which must inevitably lead to an expensive replacement of such a tool.
Der Erfindung liegt die Aufgabe zugrunde, ein Werkzeug zu schaffen, welches insbesondere im Zusammenwirken mit einer geeigneten Werkzeugaufnahme derart verschleissunanfällig ist, dass eine zuverlässige Drehmomentübertragung gewährleistet wird.The invention has for its object to provide a tool which is particularly wear-resistant in cooperation with a suitable tool holder that reliable torque transmission is guaranteed.
Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass die Fläche der mitnahmeseitigen Flanke der Drehmitnahmenut in ihrer Projektion in Umfangsrichtung grösser als die entsprechende Fläche der gegenüberliegenden Flanke ist.According to the invention, the object is achieved in that the area of the driving-side flank of the rotary driving groove is larger in its projection in the circumferential direction than the corresponding area of the opposite flank.
Die erfindungsgemäss vorgeschlagene Dimensionierung der Drehmitnahmenut führt zu einem optimalen Kompromiss zwischen Vergrösserung der für die Drehmomentübertragung massgebenden Uebertragungsfläche der Drehmitnahmenut und Vermeidung einer sich schädlich auf die Festigkeit des Werkzeuges auswirkenden Querschnittsschwächung. Mit dem Begriff der Projektion in Umfangsrichtung wird zum Ausdruck gebracht, dass massgebend für die Drehmomentübertragung die schlussendlich resultierende, im wesentlichen radial verlaufende Fläche ist, welche beispielsweise bei geradlinigem Verlauf der Flanken mit einem Radius zusammenfällt, sofern die Flanken radial verlaufen. Dadurch, dass nur die mitnahmeseitige Flanke in ihrer Fläche vergrössert wird, erfolgt keine nennenswerte, sich auf die Festigkeit des Werkzeuges negativ auswirkende Querschnittsschwächung des Einspannschaftes.The dimensioning of the rotary driving groove proposed according to the invention leads to an optimal compromise between increasing the transmission surface of the rotating driving groove which is decisive for the torque transmission and avoiding a cross-sectional weakening which has a detrimental effect on the strength of the tool. The term projection in the circumferential direction expresses that the decisive factor for the torque transmission is the ultimately resulting, essentially radial surface, which for example coincides with a radius when the flanks are straight, provided the flanks run radially. The fact that only the flank on the driving side is enlarged in its area means that there is no appreciable cross-sectional weakening of the clamping shank, which has a negative effect on the strength of the tool.
Eine einfache Möglichkeit der Flächenvergrösserung der mitnahmeseitigen Flanke besteht zweckmässigerweise darin, dass das Radialmass dieser mitnahmeseitigen Flanke der Drehmitnahmenut grösser als das Radialmass der gegenüberliegenden Flanke ist. Dadurch entsteht an der Nut ein Boden, welcher von einem Kreisbogen um das Zentrum des Einspannschaftes oder einer Tangente daran abweicht, dh der Boden kann beispielsweise in Form einer geneigten Fläche verlaufen. In bevorzugter Weise entspricht das Radialmass der mitnahmeseitigen Flanke etwa dem 1,1- bis 1,5-fachen des Radialmasses der gegenüberliegenden Flanke.A simple possibility of increasing the area of the flank on the driving side expediently consists in the radial dimension of this flank on the driving side of the rotary driving groove being greater than the radial dimension of the opposite flank. This creates a bottom on the groove, which deviates from an arc around the center of the clamping shank or a tangent to it, ie the bottom can, for example, run in the form of an inclined surface. In a preferred manner, the radial dimension of the flank on the driving side corresponds approximately to 1.1 to 1.5 times the radial dimension of the opposite flank.
Eine weitere einfache Möglichkeit der Flächenvergrösserung der mitnahmeseitigen Flanke besteht darin, dass zweckmässigerweise die Längserstreckung der mitnahmeseitigen Flanke der Drehmitnahmenut die Längserstreckung der gegenüberliegenden Flanke übersteigt. Die Flanken sind somit ungleich lang, was zu einer gegenüber dem Umfang des Einspannschaftes geneigten Rückwand der Drehmitnahmenut führt. Die Längserstreckung der mitnahmeseitigen Flanke entspricht vorzugsweise dem 1,05- bis 1,3-fachen der Längserstreckung der gegenüberliegenden Flanke.A further simple possibility of increasing the area of the flank on the driving side is that the longitudinal extent of the flank of the driving flank on the driving side advantageously exceeds the longitudinal extent of the opposite flank. The flanks are therefore of unequal length, which leads to a rear wall of the rotary driving groove which is inclined with respect to the circumference of the clamping shaft. The longitudinal extent of the flank on the driving side preferably corresponds to 1.05 to 1.3 times the longitudinal extent of the opposite flank.
Die vorgenannten beiden Massnahmen zur Flächenvergrösserung der mitnahmeseitigen Flanke können jeweils für sich einzeln oder in Kombination miteinander zur Anwendung kommen. Darüber hinaus ist beispielsweise aus Symmetriegründen und Gründen der gleichmässigen Belastung sowohl von seiten des Werkzeuges als auch von seiten der Werkzeugaufnahme eine jeweilige paarweise Anordnung von Verriegelungsnuten und Drehmitnahmenuten vorgesehen, wobei zweckmässigerweise Drehmitnahmenuten und Verriegelungsnuten sich jeweils etwa diametral einander gegenüberliegen.The aforementioned two measures for increasing the area of the flank on the driving side can be used individually or in combination with one another. In addition, for reasons of symmetry and reasons of uniform loading both on the part of the tool and on the part of the tool holder, a respective paired arrangement of locking grooves and rotary driving grooves is provided, with rotary driving grooves and locking grooves expediently being approximately diametrically opposed to one another.
Entsprechend der Ausbildung des Werkzeuges ist die zur Aufnahme dieser Werkzeuge vorgesehene Werkzeugaufnahme mit mindestens einem radial verschiebbaren Verriegelungselement und mindestens einer Mitnahmeleiste versehen, wobei die mitnahmeseitige Flanke der Mitnahmeleiste eine Fläche aufweist, die in ihrer Projektion in Umfangsrichtung grösser als die entsprechende Fläche der gegenüberliegenden Flanke ist. Die für die Drehmomentübertragung massgebende Fläche der Mitnahmeleiste wird dadurch vergrössert, was einerseits zu einer Verschleissminderung führt und andererseits ermöglicht, die Mitnahmeleisten stärker und daher weniger zerstörungsanfällig auszubilden.According to the design of the tool, the tool holder provided for holding these tools is provided with at least one radially displaceable locking element and at least one driving bar, the driving-side flank of the driving bar having a surface which is larger in projection in the circumferential direction than the corresponding surface of the opposite flank . The area of the driving bar which is decisive for the torque transmission is thereby increased, which on the one hand leads to a reduction in wear and on the other hand enables the driving bars to be made stronger and therefore less susceptible to destruction.
Analog dem Werkzeug bestehen wiederum zwei Möglichkeiten dieser Flächenvergrösserung, wobei diese Möglichkeiten für sich einzeln oder in Kombination miteinander Anwendung finden können. Während im einen Falle das Radialmass der mitnahmeseitigen Flanke der Mitnahmeleiste grösser als das Radialmass der gegenüberliegenden Flanke ist, wird im anderen Falle vorgeschlagen, die Längserstreckung der mitnahmeseitigen Flanke der Mitnahmeleiste grösser als die Längserstreckung der gegenüberliegenden Flanke auszubilden. Die massliche Vergrösserung der Flächen der mitnahmeseitigen Flanke kann im Rahmen des Werkzeuges erfolgen, dh das Radialmass der mitnahmeseitigen Flanke kann dem 1,1- bis 1,5-fachen des Radialmasses der gegenüberliegenden Flanke und die Längserstreckung der mitnahmeseitigen Flanke kann dem 1,05- bis 1,3-fachen der Längserstreckung der gegenüberliegenden Flanke entsprechen.Analogous to the tool, there are again two possibilities for this area enlargement, whereby these possibilities can be used individually or in combination with one another. While in one case the radial dimension of the flank of the driving bar on the driving side is greater than the radial dimension of the flank on the opposite side, in the other case it is proposed that the longitudinal extent of the flank of the driving bar on the driving side be greater than the longitudinal dimension of the opposite flank. The dimensions of the surfaces of the flank on the driving side can be increased within the scope of the tool, ie the radial dimension of the flank on the driving side can be 1.1 to 1.5 times the radial dimension of the flank on the opposite side and the longitudinal extent of the flank on the driving side can be 1.05. correspond to 1.3 times the length of the opposite flank.
Die Erfindung wird nachstehend, anhand der sie beispielsweise wiedergebenden Zeichnungen, näher erläutert: Es zeigen:
- Fig. 1
- eine Ansicht des Einspannschaftes eines Werkzeuges gemäss Erfindung;
- Fig. 2
- einen Schnitt durch den Einspannschaft der Fig. 1 entsprechend Linie II-II;
- Fig. 3
- eine Ansicht des Einspannschaftes eines weiteren Werkzeuges gemäss Erfindung;
- Fig. 4
- einen Schnitt durch den Einspannschaft der Fig. 3 entsprechend Linie IV-IV;
- Fig. 5
- einen Schnitt durch eine schematisch dargestellte Werkzeugaufnahme mit Einspannschaft entsprechend Linie II-II der Fig. 1.
- Fig. 1
- a view of the clamping shaft of a tool according to the invention;
- Fig. 2
- a section through the clamping shaft of Figure 1 along line II-II.
- Fig. 3
- a view of the clamping shaft of another tool according to the invention;
- Fig. 4
- a section through the clamping shaft of Figure 3 along line IV-IV.
- Fig. 5
- 2 shows a section through a schematically illustrated tool holder with a clamping shank in accordance with line II-II of FIG. 1.
Die Fig. 1 und 2 zeigen einen Einspannschaft 1 eines erfindungsgemässen Werkzeuges. Dieser Einspannschaft 1 weist zwei axial geschlossene Verriegelungsnuten 2 und zwei axial zum freien Ende des Einspannschaftes 1 hin offene Drehmitnahmenuten 3 auf. Wie insbesondere die Fig. 2 zeigt, verlaufen Flanken 3a, 3b der Drehmitnahmenuten 3 im wesentlichen radial. Wie wiederum Fig. 2 verdeutlicht, ist die Fläche der mitnahmeseitigen Flanke 3a grösser als die Fläche der gegenüberliegenden Flanke 3b, was durch Vergrösserung des Radialmasses bei der Flanke 3a zustande kommt.1 and 2 show a
Die Fig. 3 und 4 zeigen einen Einspannschaft 4 einer weiteren Ausführungsform des erfindungsgemässen Werkzeuges. Dieser Einspannschaft 4 ist mit zwei axial geschlossenen Verriegelungsnuten 5 und zwei axial zum freien Ende des Einspannschaftes 4 hin offenen Drehmitnahmenuten 6 versehen. Die Drehmitnahmenuten 6 weisen im wesentlichen radial verlaufende Flanken 6a, 6b auf, wie dies insbesondere Fig. 4 verdeutlicht. Die mitnahmeseitigen Flanken 6a der Drehmitnahmenuten 6 weisen gegenüber den gegenüberliegenden Flanken 6b eine grössere Fläche auf, was durch grössere Längserstreckung der mitnahmeseitigen Flanken 6a im Vergleich zur Längserstreckung der gegenüberliegenden Flanken 6b zustande kommt.3 and 4 show a
In Fig. 5 ist schematisch eine Werkzeugaufnahme dargestellt, in welche das Werkzeug entsprechend Fig. 1 mit Aufnahmeschaft 1, Verriegelungsnuten 2 und Mitnahmenuten 3 eingesetzt ist. Wie die Fig. 5 ferner zeigt, weist die Werkzeugaufnahme eine Führung 7, eine Betätigungshülse 8 sowie einen die Betätigungshülse 8 umgebenden Käfig 9 auf. Durch Versetzen der Betätigungshülse 8 entweder axial oder in Umfangsrichtung, sind im gezeigten Beispiel nicht dargestellte Ausnehmungen in Radialprojektion von Verriegelungselementen 10 bringbar, so dass diese Verriegelungselemente 10 ausweichen können. Dies führt dazu, dass die Verriegelungselemente 10 aus den Verriegelungsnuten 2 ausrücken können und dadurch den Einspannschaft 1 freigeben, so dass das Werkzeug aus der Führung 7 und damit aus der Werkzeugaufnahme entnommen werden kann.In Fig. 5 a tool holder is shown schematically, in which the tool according to Fig. 1 is inserted with the
Wie die Fig. 5 ferner zeigt, weist die Führung 7 Mitnahmeleisten 7a auf, welche mit im wesentlichen radial verlaufenden Flanken 7b, 7c versehen sind. Dabei weist die mitnahmeseitige Flanke 7b gegenüber der gegenüberliegenden Flanke 7c eine grössere Fläche auf, was im vorliegenden Beispiel durch Erhöhung des Radialmasses zustande kommt.As FIG. 5 also shows, the
Claims (8)
- Tool to be inserted in a tool chuck of a hand tool appliance intended for chiselling and/or hammer drilling, with a clamping shank (1, 4) having at least one axially closed locking groove (2, 5) and at least one rotation drive groove (3, 6) which is open in the axial direction at the free end of the clamping shank (1, 4) and which has two substantially radially extending flanks (3a, 3b, 6a, 6b), characterised in that the surface of the flank (3a, 6a) on the drive side of the rotation drive groove (3, 6) is larger in its projection in the peripheral direction than the corresponding surface of the opposite flank (3b, 6b).
- Tool according to claim 1, characterised in that the radial measurement of the flank (3a) on the drive side of the rotation drive groove (3) is larger than the radial measurement of the opposite flank (3b).
- Tool according to claim 2, characterised in that the radial measurement of the flank (3a) on the drive side corresponds to 1.1 to 1.5 times the radial measurement of the opposite flank (3b).
- Tool according to one of claims 1 to 3, characterised in that the longitudinal extent of the flank (6a) on the drive side of the rotation drive groove (6) exceeds the longitudinal extent of the opposite flank (6b).
- Tool according to claim 4, characterised in that the longitudinal extent of the flank (6a) on the drive side corresponds to 1.05 to 1.3 times the longitudinal extent of the opposite flank (6b).
- Tool chuck for a tool especially according to one of claims 1 to 5, characterised by at least one radially displaceable locking element (10) adapted to co-operate with a locking groove and at least one drive rib (7a) adapted to co-operate with a rotation drive groove, the flank (7b) on the drive side of the drive rib having a surface which in its projection in the peripheral direction is larger than the corresponding surface of the opposite flank (7c).
- Tool chuck according to claim 6, characterised in that the radial measurement of the flank (7b) on the drive side of the drive rib (7a) is larger than the radial measurement of the opposite flank (7c).
- Tool chuck according to claim 6 or 7, characterised in that the longitudinal extent of the flank on the drive side of the drive rib is larger than the longitudinal extent of the opposite flank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4222744 | 1992-07-10 | ||
| DE19924222744 DE4222744A1 (en) | 1992-07-10 | 1992-07-10 | Tool and tool holder for hand tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0581726A1 EP0581726A1 (en) | 1994-02-02 |
| EP0581726B1 true EP0581726B1 (en) | 1996-08-21 |
Family
ID=6462950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19930810479 Expired - Lifetime EP0581726B1 (en) | 1992-07-10 | 1993-07-06 | Tool and chuck for a portable tool |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0581726B1 (en) |
| DE (2) | DE4222744A1 (en) |
| DK (1) | DK0581726T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU742424B2 (en) * | 1997-11-26 | 2002-01-03 | Illinois Tool Works Inc. | Drill bits and holders therefor |
| AUPP053097A0 (en) * | 1997-11-26 | 1997-12-18 | Ramset Fasteners (Aust.) Pty. Limited | Drill bits and holders therefor |
| DE10357380A1 (en) * | 2003-12-05 | 2005-06-30 | Hilti Ag | Plug-in ends for a rotating and / or beating tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2551125A1 (en) * | 1975-11-14 | 1977-05-26 | Bosch Gmbh Robert | DEVICE FOR TORQUE TRANSMISSION |
| FR2424408A1 (en) * | 1978-04-24 | 1979-11-23 | Stenuick Freres | PERFORATION SIZE FOR PNEUMATIC BOTTOM-OF-HOLE HAMMER |
-
1992
- 1992-07-10 DE DE19924222744 patent/DE4222744A1/en not_active Withdrawn
-
1993
- 1993-07-06 DE DE59303488T patent/DE59303488D1/en not_active Expired - Fee Related
- 1993-07-06 EP EP19930810479 patent/EP0581726B1/en not_active Expired - Lifetime
- 1993-07-06 DK DK93810479T patent/DK0581726T3/da active
Also Published As
| Publication number | Publication date |
|---|---|
| DK0581726T3 (en) | 1997-02-24 |
| EP0581726A1 (en) | 1994-02-02 |
| DE4222744A1 (en) | 1994-01-13 |
| DE59303488D1 (en) | 1996-09-26 |
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