EP0666147B1 - Tool and tool holding fixture for implements - Google Patents
Tool and tool holding fixture for implements Download PDFInfo
- Publication number
- EP0666147B1 EP0666147B1 EP94810732A EP94810732A EP0666147B1 EP 0666147 B1 EP0666147 B1 EP 0666147B1 EP 94810732 A EP94810732 A EP 94810732A EP 94810732 A EP94810732 A EP 94810732A EP 0666147 B1 EP0666147 B1 EP 0666147B1
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- EP
- European Patent Office
- Prior art keywords
- tool
- groove
- longitudinal groove
- section
- 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.)
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/17—Socket type
- Y10T279/17042—Lost motion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/907—Tool or Tool with support including detailed shank
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/94—Tool-support
- Y10T408/95—Tool-support with tool-retaining means
- Y10T408/953—Clamping jaws
Definitions
- the invention relates to a tool for insertion into a tool holder for the Chisels and / or impact drilling hand tools with a clamping shank with at least one axially closed locking groove, at least one of the Locking groove diametrically opposite to the free end of the Clamping shaft open longitudinal groove and two mutually essentially diametrically opposite rotary driving grooves open towards the free end of the clamping shaft, the different cross sections with different sizes, radially outwards have directed opening surfaces.
- the tools mentioned are used in hand tool devices and their tool holder two carrier bars and one or two radially displaceable locking elements exhibit.
- the driver strips are for connection to the rotary driver grooves provided and serve to transmit the torque.
- the radial displaceable locking elements, which are designed as balls or rollers can come into contact with the axially closed locking grooves and serve thus the axial fixation of the tools in the tool holder.
- a serious disadvantage of the aforementioned, provided with a longitudinal groove in the clamping shaft Tool is that it is in hand tool devices, their tool holder has two locking elements, can not be used because the second Locking element cannot enter the longitudinal groove. Will the tool against it used in a tool holder with only one locking element Carrier strips of the same cross-section rotated the possibility of insertion by 180 °. Due to the existing games or the resilient mounting of the locking elements the means for radial displacement can still be operated, so that the locking elements with the clamping shaft in a sometimes quite strong Friction. This incorrect locking is not without it for the operator further recognizable, since the frictional engagement itself is the usual control movement withstands to detect the axial fixation. Unintentional loosening of the axial Fixing the tool in the tool holder is therefore completely unforeseen and unintentionally in the event of an accident, so that accidents are not excluded.
- the invention is therefore based on the object to provide a tool for Transmission of high torques in appropriately trained tool holders is suitable and enables use in conventional tool holders, there, however, a possible incorrect locking can be sufficiently recognized.
- the object is achieved in that the axial projection surface of the clear cross-section of the longitudinal groove of at least the axial projection surface of the clear Cross-section of the locking groove corresponds and that the two rotary driving grooves in radial direction measured have a smaller depth than the locking groove or the rotary driving groove.
- the tool with the clamping shank according to the invention can be conventional Insert tool holders with two locking elements without problems. Becomes this tool in conventional tool holders with only one locking element properly inserted, there is sufficient axial fixation. In contrast, the tool is rotated through 180 ° in such a tool holder incorrectly inserted, the locking element occurs without further hindrance in the clear cross-section of the longitudinal groove, but does not come with the system there any circumferential parts of the clamping shaft. There is no connection in any way between the clamping shaft and the locking element, so that it is for the operator by failing to make the axial fixation or at the latest when the control handle is used anyway, it can be seen that the Tool has been inserted incorrectly into the tool holder. It is complete excluded that the operator with an incorrectly inserted tool starts machining components.
- the axial projection surface of the clear cross section preferably corresponds to the Longitudinal groove of the axial projection surface of the clear cross section of the locking groove. It is expedient here, based on the axis of symmetry of the Rotary driving grooves to form the longitudinal groove axially symmetrical to the locking groove.
- the longitudinal groove is advantageously trough-shaped.
- Trough-shaped is understood to mean a longitudinal groove, the bottom of which is in cross section seen adapted to the application of the rotationally symmetrical locking bodies is.
- the axial projection surface of the clear cross section of the longitudinal groove is the axial projection area of the clear cross section exceed the locking groove.
- the longitudinal groove preferably has at least one substantially radial one Flank on.
- the flank of the longitudinal groove on the driving side runs essentially radially.
- the remaining Flanks can run in different ways, for example tendon-like or also radial.
- the tool according to the invention is, on the one hand about the fact that it is in the hand tools that are widespread on the market can be used.
- the other task is to use the tool like this to train that it is also suitable for the transmission of larger torques.
- This the latter task can be solved by an appropriately trained tool holder, which cooperates with at least one axially closed locking groove, radially displaceable locking element, two with the rotary driving grooves cooperating slats, which are of different widths with different cross sections are provided, as well as at least one with the longitudinal groove cooperating longitudinal bar.
- the tool shown in FIG. 1 has a clamping shank 1. Diametrically mutually opposite the clamping shank 1, two rotary driving grooves 2, 3, the rotary driving groove 3 having a larger cross section with a larger, radial has outward opening area. In addition, it is axially closed Locking groove 4 provided. This locking groove 4 is diametrically opposite a trough-shaped longitudinal groove 5 is arranged, which to the free end of the clamping shaft 1 is open.
- the tool according to FIG. 2 has a clamping shank 6, which with two each other diametrically opposite rotary driving grooves 7, 8 is provided.
- the Rotary driving groove 8 has a larger cross section with a larger radial outward open area.
- the axial projection surface of the clear cross section of the longitudinal groove 10 exceeds the axial projection surface of the clear cross section of the locking groove 9.
- the drive-side flank 10a of the longitudinal groove 10 is essentially radial formed continuously, for example in the present clamping shaft 6 around a symmetrically formed longitudinal groove 10 with radially extending on both sides Flanks.
- Fig. 3 shows a section through a simplified tool holder ⁇ in which a tool with a clamping shank 1 according to FIG. 1 is used.
- the Tool holder consists essentially of a guide 11, an actuating sleeve 12 and a cage 13.
- the guide 11 has two diametrically opposite one another Carrier strips 11a, 11b.
- the drive bar 11b is opposite the driving bar 11a with a larger cross section with a greater width.
- the guide 11 has a driving bar 11c, which in the present example seen in cross section is dome-shaped.
- For the axial fixation of the tool is also a radially displaceable locking element 14 in the form of a ball intended.
Description
Die Erfindung betrifft ein Werkzeug zum Einsetzen in eine Werkzeugaufnahme für dem Meisseln und/oder Schlagbohren dienende Handwerkzeuggeräte mit einem Einspannschaft mit wenigstens einer axial geschlossenen Verriegelungsnut, wenigstens einer der Verriegelungsnut diametral gegenüberliegenden, zum freien Ende des Einspannschaftes hin offenen Längsnut sowie zwei einander im wesentlichen diametral gegenüberliegenden, zum freien Ende des Einspannschaftes hin offenen Drehmitnahmenuten, die unterschiedliche Querschnitte mit verschieden grossen, radial nach aussen gerichteten Oeffnungsflächen haben.The invention relates to a tool for insertion into a tool holder for the Chisels and / or impact drilling hand tools with a clamping shank with at least one axially closed locking groove, at least one of the Locking groove diametrically opposite to the free end of the Clamping shaft open longitudinal groove and two mutually essentially diametrically opposite rotary driving grooves open towards the free end of the clamping shaft, the different cross sections with different sizes, radially outwards have directed opening surfaces.
Entsprechend der DE-PS 25 51 125 sind heute weltweit in ausserordentlich grossem Umfange Werkzeuge verbreitet, deren Einspannschaft zwei einander diametral gegenüberliegende, axial geschlossene Verriegelungsnuten und zwei einander ebenfalls diametral gegenüberliegende, zum freien Ende des Einspannschaftes hin offene Drehmitnahmenuten aufweisen. Sowohl die Verriegelungsnuten untereinander als auch die Drehmitnahmenuten untereinander weisen gleiche Querschnitte auf.According to DE-PS 25 51 125 are today extremely large worldwide Widespread tools, the clamping shank two diametrically opposite, axially closed locking grooves and two diametrically opposed to each other opposite rotary driving grooves open towards the free end of the clamping shaft exhibit. Both the locking grooves with each other and the Rotary driving grooves have the same cross sections.
Zum Einsatz kommen die genannten Werkzeuge in Handwerkzeuggeräten, deren Werkzeugaufnahme zwei Mitnahmeleisten sowie ein oder zwei radial verschiebbare Verriegelungselemente aufweisen. Die Mitnahmeleisten sind zur Verbindung mit den Drehmitnahmenuten vorgesehen und dienen der Uebertragung des Drehmomentes. Die radial verschiebbaren Verriegelungselemente, welche als Kugeln oder Walzen ausgebildet sein können, treten in Verbindung mit den axial geschlossenen Verriegelungsnuten und dienen somit der axialen Festlegung der Werkzeuge in der Werkzeugaufnahme.The tools mentioned are used in hand tool devices and their tool holder two carrier bars and one or two radially displaceable locking elements exhibit. The driver strips are for connection to the rotary driver grooves provided and serve to transmit the torque. The radial displaceable locking elements, which are designed as balls or rollers can come into contact with the axially closed locking grooves and serve thus the axial fixation of the tools in the tool holder.
Da an die axiale Festlegung der Werkzeuge in der Werkzeugaufnahme nicht besonders hohe Anforderungen gestellt werden, ist nebst der Verwendung von zwei Verriegelungselementen in ausserordentlich starkem Umfange die Verwendung von nur einem Verriegelungselement verbreitet. Bei dieser axialen Festlegung geht es im wesentlichen darum, sicherzustellen, dass das Werkzeug sich nicht unbeabsichtigt aus der Werkzeugaufnahme löst, so dass insbesondere auf Baustellen durch herunterfallende Werkzeuge keine Gefahren entstehen. Darüber hinaus dient die axiale Festlegung dazu, dass das Werkzeug samt dem Handwerkzeuggerät nach Beendigung des Bearbeitungsvorganges vom Bauteil wieder entfernt werden kann.Because of the axial fixation of the tools in the tool holder not particularly high demands are made in addition to the use of two locking elements exceptionally strong use of only one Locking element spread. This axial determination is essentially about to make sure that the tool does not accidentally come out of the tool holder solves so that especially on construction sites due to falling tools no dangers arise. In addition, the axial definition serves that the Tool together with the hand tool after completion of the machining process can be removed from the component.
Im Zusammenhang mit der Uebertragung des Drehmomentes werden dagegen wesentlich höhere Anforderungen gestellt. Insbesondere aufgrund der laufend grösseren, zum Einsatz kommenden Arbeitsdurchmesser der Werkzeuge, samt der damit verbundenen Steigerung der Leistung der Handwerkzeuggeräte treten in zunehmendem Masse höhere, zu übertragende Drehmomente auf. Dies hat zur Folge, dass bei den Werkzeugen im Einspannschaft, insbesondere im Bereich der Drehmitnahmenuten ein vorzeitiger Verschleiss auftritt, welcher lange vor dem einsatzbedingten Verschleiss der übrigen Teile der Werkzeuge liegt.In connection with the transmission of the torque, however, become essential made higher demands. In particular due to the continuously larger, for The coming working diameter of the tools, including the associated one Increasing the performance of handheld tools are increasingly increasing, torques to be transmitted. As a result, the tools premature wear in the clamping shank, especially in the area of the rotary driving grooves occurs long before the operational wear of the other parts the tools lie.
Zur Behebung der Problematik, insbesondere betreffend höherer, zu übertragender Drehmomente, wird gemäss DE-A-39 41 646 vorgeschlagen, eine der Drehmitnahmenuten mit einem grösseren Querschnitt zu versehen. Diese Massnahme ermöglicht die Vergrösserung der damit zusammenwirkenden Mitnahmeleiste der Werkzeugaufnahme, so dass insgesamt eine grössere Verschleissreserve erzielt wird.To correct the problem, especially regarding higher ones to be transferred Torques is proposed according to DE-A-39 41 646, one of the rotary driving grooves to be provided with a larger cross section. This measure enables the Enlargement of the interacting tool bar of the tool holder, so that overall a larger wear reserve is achieved.
Nebst der genannten Querschnittsvergrösserung wird gemäss DE-A-39 41 646 zur weiteren Steigerung der Verschleissreserve bei grösseren Drehmomenten zudem vorgeschlagen, anstelle der einen Verriegelungsnut eine zum freien Ende des Einspannschaftes hin offene Längsnut vorzusehen. Diese Längsnut ermöglicht das Vorsehen einer damit zusammenwirkenden Längsleiste in einer entsprechend ausgebildeten Werkzeugaufnahme, so dass eine zusätzliche Flanke für die Uebertragung des Drehmomentes zur Verfügung steht.In addition to the above-mentioned cross-sectional enlargement, according to DE-A-39 41 646 for the further Proposed increase in the wear reserve at higher torques instead of the one locking groove one to the free end of the clamping shaft provide open longitudinal groove. This longitudinal groove enables the provision of a cooperating longitudinal bar in a suitably designed tool holder, so that an additional edge for the transmission of the torque Available.
Alle vorgenannten Massnahmen haben ihre Berechtigung und ihre Vorteile bei Verwendung der Werkzeuge in dafür abgestimmten Werkzeugaufnahmen. Wie eingangs geschildert, darf jedoch nicht ausser acht gelassen werden, dass aufgrund der bisher verwendeten Werkzeuge Handwerkzeuggeräte weltweit stark verbreitet sind, deren Aufnahme zwei Mitnahmeleisten gleichen Querschnitts und ein oder zwei radial verschiebbare Verriegelungselemente aufweist. Somit ist es eine wichtige Aufgabe, neue, für höhere Drehmomente ausgelegte Werkzeuge so auszubilden, dass sie mit den Werkzeugaufnahmen der heute sich noch am Markt befindlichen Handwerkzeuggeräte kompatibel sind, wenn auch unter Vernachlässigung der mit den neuen Werkzeugen erzielten Vorteile. All of the above measures have their justification and their advantages when used of the tools in coordinated tool holders. As described at the beginning, However, it should not be forgotten that due to the previously used Hand tools are widely used worldwide, their inclusion two carrier strips of the same cross-section and one or two radially movable ones Has locking elements. So it is an important task, new ones, for higher ones Torque designed tools so that they with the tool holders of the hand tool devices still on the market today are, albeit neglecting those achieved with the new tools Advantages.
Ein gravierender Nachteil des vorgenannten, mit einer Längsnut im Einspannschaft versehenen Werkzeuges besteht darin, dass es in Handwerkzeuggeräten, deren Werkzeugaufnahme zwei Verriegelungselemente aufweist, nicht einsetzbar ist, da das zweite Verriegelungselement nicht in die Längsnut eintreten kann. Wird das Werkzeug dagegen in einer Werkzeugaufnahme mit nur einem Verriegelungselement verwendet, besteht bei Mitnahmeleisten gleicher Querschnitte die Möglichkeit des Einführens um 180° verdreht. Aufgrund der vorhandenen Spiele bzw. der federnden Lagerung der Verriegelungselemente lassen sich die Mittel für radiale Verschiebung trotzdem betätigen, so dass die Verriegelungselemente mit dem Einspannschaft in einen zum Teil recht starken Reibschluss treten. Für die Bedienungsperson ist diese Fehlverriegelung nicht ohne weiteres erkennbar, da der Reibschluss selbst der an sich üblichen Kontrollbewegung zur Erkennung der axialen Festlegung standhält. Das unbeabsichtigte Lösen der axialen Festlegung des Werkzeuges in der Werkzeugaufnahme tritt somit völlig unvorhergesehen und ungewollt im Einsatzfalle auf, so dass Unfälle nicht ausgeschlossen sind.A serious disadvantage of the aforementioned, provided with a longitudinal groove in the clamping shaft Tool is that it is in hand tool devices, their tool holder has two locking elements, can not be used because the second Locking element cannot enter the longitudinal groove. Will the tool against it used in a tool holder with only one locking element Carrier strips of the same cross-section rotated the possibility of insertion by 180 °. Due to the existing games or the resilient mounting of the locking elements the means for radial displacement can still be operated, so that the locking elements with the clamping shaft in a sometimes quite strong Friction. This incorrect locking is not without it for the operator further recognizable, since the frictional engagement itself is the usual control movement withstands to detect the axial fixation. Unintentional loosening of the axial Fixing the tool in the tool holder is therefore completely unforeseen and unintentionally in the event of an accident, so that accidents are not excluded.
Der Erfindung liegt demnach die Aufgabe zugrunde, ein Werkzeug zu schaffen, das zur Uebertragung grosser Drehmomente in entsprechend ausgebildeten Werkzeugaufnahmen geeignet ist und eine Anwendung in herkömmlichen Werkzeugaufnahmen ermöglicht, dort aber eine allfällige Fehlverriegelung ausreichend erkennen lässt. The invention is therefore based on the object to provide a tool for Transmission of high torques in appropriately trained tool holders is suitable and enables use in conventional tool holders, there, however, a possible incorrect locking can be sufficiently recognized.
Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass die axiale Projektionsfläche des lichten Querschnitts der Längsnut wenigstens der axialen Projektionsfläche des lichten Querschnitts der Verriegelungsnut entspricht und dass die beiden Drehmitnahmenuten in radialer Richtung gemessen eine geringere Tiefe aufweisen, als die Verriegelungsnut oder die Drehmitnahmenut. According to the invention, the object is achieved in that the axial projection surface of the clear cross-section of the longitudinal groove of at least the axial projection surface of the clear Cross-section of the locking groove corresponds and that the two rotary driving grooves in radial direction measured have a smaller depth than the locking groove or the rotary driving groove.
Das Werkzeug mit dem erfindungsgemässen Einspannschaft lässt sich in herkömmliche Werkzeugaufnahmen mit zwei Verriegelungselementen ohne Probleme einführen. Wird dieses Werkzeug in herkömmliche Werkzeugaufnahmen mit nur einem Verriegelungselement richtig eingeführt, kommt eine ausreichende axiale Festlegung zustande. Wird das Werkzeug dagegen in einer solchen Werkzeugaufnahme um 180° verdreht falsch eingeführt, tritt das Verriegelungselement ohne weitere Behinderung vollumfänglich in den lichten Querschnitt der Längsnut ein, kommt dort aber nicht zur Anlage mit irgendwelchen Umfangsteilen des Einspannschaftes. Es kommt dadurch keine Verbindung in irgendeiner Art zwischen Einspannschaft und Verriegelungselement zustande, so dass es für die Bedienungsperson durch Nichtzustandekommen der axialen Festlegung oder allerspätestens beim ohnehin üblichen Kontrollgriff erkennbar ist, dass das Werkzeug falsch in die Werkzeugaufnahme eingesetzt worden ist. Es ist damit völlig ausgeschlossen, dass die Bedienungsperson mit einem falsch eingesetzten Werkzeug die Bearbeitung von Bauteilen aufnimmt. The tool with the clamping shank according to the invention can be conventional Insert tool holders with two locking elements without problems. Becomes this tool in conventional tool holders with only one locking element properly inserted, there is sufficient axial fixation. In contrast, the tool is rotated through 180 ° in such a tool holder incorrectly inserted, the locking element occurs without further hindrance in the clear cross-section of the longitudinal groove, but does not come with the system there any circumferential parts of the clamping shaft. There is no connection in any way between the clamping shaft and the locking element, so that it is for the operator by failing to make the axial fixation or at the latest when the control handle is used anyway, it can be seen that the Tool has been inserted incorrectly into the tool holder. It is complete excluded that the operator with an incorrectly inserted tool starts machining components.
In bevorzugter Weise entspricht die axiale Projektionsfläche des lichten Querschnitts der Längsnut der axialen Projektionsfläche des lichten Querschnitts der Verriegelungsnut. Dabei bietet es sich zweckmässigerweise an, bezogen auf die Symmetrieachse der Drehmitnahmenuten die Längsnut achssymmetrisch zur Verriegelungsnut auszubilden.The axial projection surface of the clear cross section preferably corresponds to the Longitudinal groove of the axial projection surface of the clear cross section of the locking groove. It is expedient here, based on the axis of symmetry of the Rotary driving grooves to form the longitudinal groove axially symmetrical to the locking groove.
Im Hinblick auf die Anwendung findenden rotationssymmetrischen Verriegelungskörper, wie Kugeln oder Zylinder ist vorteilhafterweise die Längsnut muldenförmig ausgebildet. Unter muldenförmig wird dabei eine Längsnut verstanden, deren Boden im Querschnitt gesehen den Anwendung findenden, rotationssymmetrischen Verriegelungskörpern angepasst ist.With regard to the application of the rotationally symmetrical locking body, like balls or cylinders, the longitudinal groove is advantageously trough-shaped. Trough-shaped is understood to mean a longitudinal groove, the bottom of which is in cross section seen adapted to the application of the rotationally symmetrical locking bodies is.
Gemäss einer weiteren Ausführungsform der Erfindung kann die axiale Projektionsfläche des lichten Querschnitts der Längsnut die axiale Projektionsfläche des lichten Querschnitts der Verriegelungsnut übersteigen. Dadurch eröffnen sich Möglichkeiten verschiedenartiger Ausbildung, insbesondere im Hinblick auf das Zusammenwirken mit entsprechend ausgebildeten Längsleisten neuer Werkzeugaufnahmen.According to a further embodiment of the invention, the axial projection surface of the clear cross section of the longitudinal groove is the axial projection area of the clear cross section exceed the locking groove. This opens up various possibilities Training, especially in terms of interacting with accordingly trained longitudinal strips of new tool holders.
Vorzugsweise weist die Längsnut wenigstens eine, im wesentlichen radial verlaufende Flanke auf. Im Hinblick auf das zu übertragende Drehmoment ist es dabei zweckmässig, wenn die mitnahmeseitige Flanke der Längsnut im wesentlichen radial verläuft. Die übrigen Flanken können verschiedenartig verlaufen, beispielsweise sehnenartig oder ebenfalls radial.The longitudinal groove preferably has at least one substantially radial one Flank on. With regard to the torque to be transmitted, it is advisable if the flank of the longitudinal groove on the driving side runs essentially radially. The remaining Flanks can run in different ways, for example tendon-like or also radial.
Wie bereits darauf hingewiesen, geht es beim erfindungsgemässen Werkzeug zum einen darum, dass es in die sich in grossem Umfange am Markt verbreiteten Handwerkzeuggeräte einsetzbar ist. Die weitere Aufgabe besteht aber darin, das Werkzeug so auszubilden, dass es auch zur Uebertragung grösserer Drehmomente geeignet ist. Diese letztere Aufgabe lässt sich lösen durch eine entsprechend ausgebildete Werkzeugaufnahme, welche mindestens ein mit der axial geschlossenen Verriegelungsnut zusammenwirkendes, radial verschiebbares Verriegelungselement, zwei mit den Drehmitnahmenuten zusammenwirkende Mitnahmeleisten, die durch unterschiedliche Breite mit unterschiedlichen Querschnitten versehen sind, sowie mindestens eine mit der Längsnut zusammenwirkende Längsleiste aufweist.As already pointed out, the tool according to the invention is, on the one hand about the fact that it is in the hand tools that are widespread on the market can be used. The other task is to use the tool like this to train that it is also suitable for the transmission of larger torques. This the latter task can be solved by an appropriately trained tool holder, which cooperates with at least one axially closed locking groove, radially displaceable locking element, two with the rotary driving grooves cooperating slats, which are of different widths with different cross sections are provided, as well as at least one with the longitudinal groove cooperating longitudinal bar.
Durch die erfindungsgemäss ausgebildete breitere Ausbildung einer Mitnahmeleiste steht mehr Verschleissreserve zur Verfügung. Darüber hinaus wird durch die Längsleiste eine weitere, der Drehmomentübertragung dienende Flanke geschaffen. Due to the wider design of a driving bar designed according to the invention there is more wear reserve available. In addition, the longitudinal bar created a further flank serving for torque transmission.
Die Erfindung wird nachstehend, anhand der sie beispielsweise wiedergebenden Zeichnungen, näher erläutert. Es zeigen:
- Fig. 1
- einen Schnitt durch einen Einspannschaft des erfindungsgemässen Werkzeuges;
- Fig. 2
- einen Schnitt durch den Einspannschaft eines weiteren erfindungsgemässen Werkzeuges;
- Fig. 3
- einen Schnitt durch eine vereinfacht dargestellte Werkzeugaufnahme mit einem Werkzeug, das einen Einspannschaft entsprechend Fig. 1 aufweist.
- Fig. 1
- a section through a clamping shaft of the tool according to the invention;
- Fig. 2
- a section through the clamping shank of a further tool according to the invention;
- Fig. 3
- a section through a tool holder shown in simplified form with a tool that has a clamping shaft according to FIG. 1.
Das in Fig. 1 dargestellte Werkzeug weist einen Einspannschaft 1 auf. Einander diametral
gegenüberliegend weist der Einspannschaft 1, zwei Drehmitnahmenuten 2, 3 auf,
wobei die Drehmitnahmenut 3 einen grösseren Querschnitt mit einer grösseren, radial
nach aussen gerichteten Oeffnungsfläche besitzt. Darüber hinaus ist eine axial geschlossene
Verriegelungsnut 4 vorgesehen. Dieser Verriegelungsnut 4 ist diametral gegenüberliegend
eine muldenförmige Längsnut 5 angeordnet, welche zum freien Ende
des Einspannschaftes 1 hin offen ist.The tool shown in FIG. 1 has a
Das Werkzeug gemäss Fig. 2 weist einen Einspannschaft 6 auf, der mit zwei einander
diametral gegenüberliegenden Drehmitnahmenuten 7, 8 versehen ist. Dabei weist die
Drehmitnahmenut 8 einen grösseren Querschnitt mit einer grösseren radial nach aussen
gerichteten Oeffnungsfläche auf. Ferner ist eine axial geschlossene Verriegelungsnut 9
vorgesehen, welcher diametral eine Längsnut 10 gegenüberliegt. Die axiale Projektionsfläche
des lichten Querschnitts der Längsnut 10 übersteigt die axiale Projektionsfläche
des lichten Querschnitts der Verriegelungsnut 9. Zur optimalen Drehübertragung ist ferner
wenigstens die mitnahmeseitige Flanke 10a der Längsnut 10 im wesentlichen radial
vertaufend ausgebildet, wobei es sich beispielhaft beim vorliegenden Einspannschaft 6
um eine symmetrisch ausgebildete Längsnut 10 mit beidseits radial verlaufenden
Flanken handelt.The tool according to FIG. 2 has a
Fig. 3 zeigt einen Schnitt durch eine vereinfacht dargestellte Werkzeugaufnahme` in welche
ein Werkzeug mit einem Einspannschaft 1 entsprechend Fig. 1 eingesetzt ist. Die
Werkzeugaufnahme besteht im wesentlichen aus einer Führung 11, einer Betätigungshülse
12 sowie einem Käfig 13. Die Führung 11 weist zwei einander diametral gegenüberliegende
Mitnahmeleisten 11a, 11b auf. Dabei ist die Mitnahmeleiste 11b gegenüber
der Mitnahmeleiste 11a mit einem grösseren Querschnitt mit grösserer Breite versehen.
Ferner weist die Führung 11 eine Mitnahmeleiste 11c auf, die im vorliegenden Beispiel
im Querschnitt gesehen kuppenförmig ausgebildet ist. Zur axialen Festlegung des Werkzeuges
ist zudem ein radial verschiebbares Verriegelungselement 14 in Form einer Kugel
vorgesehen.Fig. 3 shows a section through a simplified tool holder` in which
a tool with a clamping
Claims (8)
- Tool for insertion into a tool chuck for hand tools performing milling and/or percussion operations, comprising a clamping shaft (1, 6) with at least one axially closed locking groove (4, 9), at least one longitudinal groove (5, 10), which is positioned diametrically opposite the locking groove (4, 9) and open towards the free end of the clamping shaft (1, 6), and two rotary pickup grooves (2, 3, 7, 8), which are essentially positioned diametrically opposite each other and open towards the free end of the clamping shaft (1, 6) and of different cross-sections with radially outward oriented opening surfaces of different sizes, characterised in that the axial projection surface of the clear cross-section of the longitudinal groove (5, 10) corresponds at least with the axial projection surface of the clear cross-section of the locking groove (4, 9), and both rotary pickup grooves (2, 3, 7, 8) have, as measured in the radial direction, a lesser depth than the locking groove (4, 9) or the rotary pickup groove (5, 10).
- Tool according to Claim 1, characterised in that the axial projection surface of the clear cross-section of the longitudinal groove (5) corresponds with the axial projection surface of the clear cross-section of the locking groove (4).
- Tool according to Claim 2, characterised in that the longitudinal groove (5) is relative to the symmetry axis of the rotary pickup grooves (2, 3) axis-symmetrically to the locking groove (4).
- Tool according to Claim 2 or 3, characterised in that the longitudinal groove (5) is in the shape of a recess.
- Tool according to Claim 1, characterised in that the axial projection surface of the clear cross-section of the longitudinal groove (10) exceeds the axial projection surface of the clear cross-section of the locking groove (9).
- Tool according to Claim 5, characterised in that the longitudinal groove (10) comprises at least one essentially radially extending flank.
- Tool according to Claim 6, characterised in that the pickup flank (10a) of the longitudinal groove extends essentially radially.
- Tool chuck with receiving opening for a tool according to one of Claims 1 to 7, characterised by at least one radially displaceable locking element (14) which co-acts with the axially closed locking groove, two pickup ledges (11a, 11b) which co-act with the rotary pickup grooves and which are by means of different width provided with different cross-sections, and by at least one longitudinal ledge (11c) which co-acts with the longitudinal groove.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4403303 | 1994-02-03 | ||
| DE4403303A DE4403303A1 (en) | 1994-02-03 | 1994-02-03 | Tool and tool holder for hand tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0666147A1 EP0666147A1 (en) | 1995-08-09 |
| EP0666147B1 true EP0666147B1 (en) | 1999-08-25 |
Family
ID=6509378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94810732A Expired - Lifetime EP0666147B1 (en) | 1994-02-03 | 1994-12-16 | Tool and tool holding fixture for implements |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5529445A (en) |
| EP (1) | EP0666147B1 (en) |
| JP (1) | JPH07223174A (en) |
| CN (1) | CN1112865A (en) |
| DE (2) | DE4403303A1 (en) |
| DK (1) | DK0666147T3 (en) |
| FI (1) | FI950414A (en) |
| HU (1) | HU216379B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4338953A1 (en) * | 1993-11-15 | 1995-05-18 | Krupp Widia Gmbh | Clamping device for connecting a tool head and a tool holder on machine tools |
| ES2155885T3 (en) * | 1994-01-14 | 2001-06-01 | Bosch Gmbh Robert | DEVICE FOR THE ROTARY TOWING OF TOOLS IN MANUAL TOOL MACHINES. |
| DE20204416U1 (en) * | 2002-03-19 | 2002-07-11 | Heller Dinklage Gmbh Geb | Tool for a hand machine tool |
| EP1535704B1 (en) * | 2003-11-26 | 2010-03-10 | HILTI Aktiengesellschaft | Tool holder for a rotary percussion tool |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2551125A1 (en) * | 1975-11-14 | 1977-05-26 | Bosch Gmbh Robert | DEVICE FOR TORQUE TRANSMISSION |
| DE3941646A1 (en) * | 1989-12-16 | 1991-06-20 | Heller Werkzeug Gmbh Geb | IMPACT DRILLING TOOL AND TOOL ADAPTER FOR IMPACT DRILLING TOOLS |
| DE4137120A1 (en) * | 1991-11-12 | 1993-05-13 | Hilti Ag | IMPACT DRILLING TOOL AND TOOL ADAPTER FOR IMPACT DRILLING TOOLS |
| DE4200643A1 (en) * | 1992-01-13 | 1993-07-15 | Hilti Ag | IMPACT DRILLING TOOLS AND CHISELING TOOLS FOR THESE TOOLS |
| DE4210451A1 (en) * | 1992-03-30 | 1993-10-07 | Plica Werkzeugfabrik Ag Mollis | Torque transmission device |
-
1994
- 1994-02-03 DE DE4403303A patent/DE4403303A1/en not_active Withdrawn
- 1994-12-16 DK DK94810732T patent/DK0666147T3/en active
- 1994-12-16 EP EP94810732A patent/EP0666147B1/en not_active Expired - Lifetime
- 1994-12-16 DE DE59408658T patent/DE59408658D1/en not_active Expired - Lifetime
-
1995
- 1995-01-27 CN CN95101642A patent/CN1112865A/en active Pending
- 1995-01-31 FI FI950414A patent/FI950414A/en unknown
- 1995-02-02 HU HU9500315A patent/HU216379B/en not_active IP Right Cessation
- 1995-02-02 JP JP7016031A patent/JPH07223174A/en active Pending
- 1995-02-02 US US08/382,726 patent/US5529445A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI950414A (en) | 1995-08-04 |
| US5529445A (en) | 1996-06-25 |
| FI950414A0 (en) | 1995-01-31 |
| DE4403303A1 (en) | 1995-08-10 |
| JPH07223174A (en) | 1995-08-22 |
| HUT69578A (en) | 1995-09-28 |
| HU216379B (en) | 1999-06-28 |
| DK0666147T3 (en) | 2000-02-07 |
| CN1112865A (en) | 1995-12-06 |
| HU9500315D0 (en) | 1995-03-28 |
| DE59408658D1 (en) | 1999-09-30 |
| EP0666147A1 (en) | 1995-08-09 |
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