EP2181804B1 - Hand tool device - Google Patents
Hand tool device Download PDFInfo
- Publication number
- EP2181804B1 EP2181804B1 EP20080019064 EP08019064A EP2181804B1 EP 2181804 B1 EP2181804 B1 EP 2181804B1 EP 20080019064 EP20080019064 EP 20080019064 EP 08019064 A EP08019064 A EP 08019064A EP 2181804 B1 EP2181804 B1 EP 2181804B1
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- EP
- European Patent Office
- Prior art keywords
- function part
- tool
- hand tool
- functional part
- adjusting body
- 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.)
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- 230000000295 complement effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000003754 machining Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B45/00—Means for securing grinding wheels on rotary arbors
- B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
Definitions
- the invention relates to a hand tool with a tool flange for a rotating drivable planar tool having drive spindle, with a screwed onto the free end of the drive spindle and the tool against the tool flange against rotation clamped clamping nut and with a clamping device having a first functional part and a second functional part whose axial distance from each other is variable, wherein the first functional part rotatably connected to the drive spindle and the second functional part rests on the tool and limited limited rotatable relative to the first functional part, wherein between the first functional part and the second functional part at least one actuating body is arranged by means whose the axial distance between the first functional part and the second functional part is determined.
- the present invention has for its object to further support in a generic hand tool synchronous running of the tool and drive spindle.
- the adjusting body yieldable deformable, but is substantially incompressible, and that at least one circumferentially extending recess is formed in at least one of the functional parts, and that the other functional part engages with a projecting region in the axial direction in the recess, whereby the adjusting body is limited in the circumferential direction on the one hand by the first functional part and on the other hand by the second functional part, so that the actuating body with a rotation of the first functional part relative to the second functional part in Loaded circumferential direction and thereby displaced in the axial direction, and that while the axial distance between the first functional part and the second functional part is increased and thus the contact pressure on the tool is increased.
- the tool and the drive spindle are not synchronized, for example when accelerating or decelerating the drive spindle or when decelerating the tool due to the machining of a workpiece, the tool, due to the friction between the tool and the second functional part, at least partially transmits its movement to the second functional part. This leads to a relative movement of the second functional part with respect to the first functional part. As a result, the projecting portion of the one functional part moves within the recess of the other functional part and presses against the actuating body.
- the actuating body deviates so loaded in the axial direction and in turn pushes against the second functional part, which leads to an increase in the axial distance between the first and the second functional part and thus to an increase of the clamping force on the tool to force a synchronous operation again.
- the actuator is essentially incompressible.
- substantially incompressible is meant that the actuator body is not or only slightly compressed at a force. It can be deformed yielding, provided that a degree of freedom is available.
- first functional part and the second functional part can be automatically returned to the untwisted basic position.
- first functional part and the second functional part are always automatically returned to the non-rotated starting position when the tool and the drive spindle (again) run synchronously and the system is unloaded; For example, the tool is not slowed down by the machining of a workpiece or the drive spindle is decelerated.
- the adjusting body comprises a substantially elastically deformable material. This ensures that the adjusting body, if no forces act on him, assumes its initial shape and starting position.
- the adjusting body has an incompressible core, which is formed, for example, by water or hydraulic fluid, and a casing.
- the substantially elastically deformable material comprises a further development of the invention, an elastic polymer.
- the adjusting body comprises a hydraulic element, in particular a filled with hydraulic fluid element.
- the adjusting body may, for example, comprise two punches, wherein one punch is arranged in the circumferential direction and the other punch in the axial direction, wherein the retraction of one punch leads to an extension of the other punch.
- the axially projecting portion of a functional part rests in the circumferential direction on the one hand on the actuating body and on the other functional part, when the first functional part is not rotated relative to the second functional part, that is in the untwisted basic position.
- the one functional part can rest on one end of the recess. This end of the recess then forms at the same time a stop for the one functional part.
- a further inventive idea lies in the axial direction projecting portion of a functional part in Circumferential direction on both sides in each case on a control element, when the first functional part is not rotated relative to the second functional part. This ensures that both functional parts can rotate limited relative to each other. As a result, the contact pressure on the tool is always increased when a slip is given to the drive spindle (leading or trailing the tool with respect to the drive spindle).
- the clamping device is arranged on the clamping nut facing side of the tool or on the side facing away from the clamping nut of the tool or when a clamping device is arranged on both sides of the tool. If the tensioning device is designed such that it permits a relative movement of the first functional part to the second functional part in only one direction, it proves to be advantageous to provide a tensioning device with opposite orientation on both sides of the tool.
- the actuating body biases the tensioning device into an unrotated basic position. This ensures that, when the first functional part and the second functional part do not move relative to one another, the tensioning device has a minimum axial distance. Thereby, an automatic unloading device is formed, which facilitates the unscrewing of the clamping nut of the drive spindle.
- the second functional part is cup-shaped and has a hollow cylindrical portion as the outer wall.
- the first functional part has a non-circular opening centrally, with which it can be arranged in a rotationally fixed manner on a section of the drive spindle which is complementary to the non-circular opening. This ensures in a simple manner that the first functional part and the drive spindle are rotatably connected to each other.
- the first functional part in the hollow cylindrical portion of the second functional part can be inserted, and if a holding means, in particular a snap ring, is provided which engages in a circumferential groove in the inner wall of the hollow cylindrical portion of the second functional part and the axial Mobility of the first functional part limited.
- a holding means in particular a snap ring
- FIGS. 1 and 2 show the front portion of a hand tool device provided in its entirety by the reference numeral 2 with a drive spindle 4, which has a tool flange 6 for a rotatably drivable sheet-like tool 8.
- the tool 8 is by means of a clamping nut 10 which is screwed onto the drive spindle 4, rotatably clamped against the tool flange 6.
- a clamping device 12 is arranged, which has a first functional part 14 which is non-rotatably connected to the drive spindle 4, and a second functional part 16 which rests on the tool 8 has.
- the second functional part 16 is limitedly rotatable relative to the first functional part 14.
- a control body 18 is arranged, which determines the axial distance 20 between the first functional part 14 and the second functional part 16. In the illustrated untwisted basic position of the tensioning device 12, the axial distance 20 between the first functional part 14 and the second functional part 16 is minimal.
- the actuator 18 is yieldably deformable, but substantially incompressible and in a circumferentially extending recess 22 (s. FIGS. 5 and 6 ) of the second functional part 16.
- This is the actuator body 18 on the one hand on the wall of the recess 22 and on the other hand on a formed as a cam 24 projecting portion 26 of the first functional part 14 at.
- the formed as a cam 24 projecting portion 26 of the first functional part 14 is circumferentially on the one hand on the actuating body 18 and on the other hand on the wall of the recess 22 of the second functional part 16, so that a stop for the cam 24 is formed in the untwisted basic position.
- the actuating body 18 is loaded by the cam 24 of the first functional part 14 in the circumferential direction 28 and thereby displaced in the sequence in the axial direction.
- the adjusting member 16 presses in the axial direction against the second functional part 16, so that the axial distance 20 of the functional parts 14,16 is slightly increased.
- the axial contact pressure of the clamping device 12 is increased to the tool 8.
- a rotation of the first functional part 14 with respect to the second functional part 16 may result if the tool 8 and the drive spindle 4 are not synchronous with each other, but slip towards each other, such as when the tool 8 is braked during machining of a workpiece or continues to run inertia in a spindle stop ,
- the clamping device 12 increases the contact pressure on the tool in the manner described and forces synchronous operation of the tool 8 and drive spindle 4.
- the second functional part 16 is cup-shaped and has a hollow cylindrical portion 34 as an outer wall.
- the first functional part 14 is in the hollow cylindrical portion 34 of the second functional part 16 can be inserted and held captive in the second functional part 16 by means of a locking means 36 formed as a retaining means 38 which is clipped into a circumferential groove 40.
- the tensioning device 12 forms a preassemblable unit.
- FIG. 1 it can be seen that during assembly of the hand tool 2, first the clamping device 12 is pushed onto the drive spindle 4.
- the first functional part 14 comes with a non-circular opening 30 in engagement with a complementary to the non-circular opening 30 formed portion 32 of the drive spindle 4.
- the first functional part 14 rotatably connected to the drive spindle 4.
- the tool 8 is pushed onto the drive spindle 4 and clamped by means of the clamping nut 10 which is screwed onto the drive spindle, rotatably clamped.
- the cam 24 of the first functional part 14 moves in the recess 22 in the circumferential direction 28 in the direction of the actuating body 18.
- the actuating body 18 is thereby displaced in the axial direction and pushes the second functional part 16 in the direction of the tool 8, which leads to an increase in the contact force between the second functional part 16 and the tool 8.
- the increased contact force causes the tool 8 to run synchronously with the drive spindle 4 again.
- the axial distance 20 between the first functional part 14 and the second functional part 16 is slightly increased with respect to the untwisted basic position.
- the clamping device 12 may be formed so that it forces a synchronism between the tool 8 and drive spindle 4 when the tool 8 leads the drive spindle 4, for example, when stopping the drive spindle.
- the cam 24 is to be arranged in the untwisted basic position at the other end of the recess 22 and correspondingly on the other side of the actuating body 18.
- the same effect is also achieved if the Clamping device 12 is arranged on the other side of the tool so that it rests with the second functional part 16 on the tool 8 and with the first functional part 14 on the clamping nut 10.
Description
Die Erfindung betrifft ein Handwerkzeuggerät mit einer einen Werkzeugflansch für ein rotierend antreibbares flächenhaftes Werkzeug aufweisenden Antriebsspindel, mit einer auf das freie Ende der Antriebsspindel aufschraubbaren und das Werkzeug gegen den Werkzeugflansch drehfest klemmenden Spannmutter und mit einer Spannvorrichtung, die ein erstes Funktionsteil und ein zweites Funktionsteil aufweist, deren axialer Abstand zueinander veränderbar ist, wobei das erste Funktionsteil drehfest mit der Antriebsspindel verbunden ist und das zweite Funktionsteil am Werkzeug anliegt und relativ zum ersten Funktionsteil begrenzt drehbar ist, wobei zwischen dem ersten Funktionsteil und dem zweiten Funktionsteil mindestens ein Stellkörper angeordnet ist, mittels dessen der axiale Abstand zwischen dem ersten Funktionsteil und dem zweiten Funktionsteil bestimmt wird.The invention relates to a hand tool with a tool flange for a rotating drivable planar tool having drive spindle, with a screwed onto the free end of the drive spindle and the tool against the tool flange against rotation clamped clamping nut and with a clamping device having a first functional part and a second functional part whose axial distance from each other is variable, wherein the first functional part rotatably connected to the drive spindle and the second functional part rests on the tool and limited limited rotatable relative to the first functional part, wherein between the first functional part and the second functional part at least one actuating body is arranged by means whose the axial distance between the first functional part and the second functional part is determined.
Da sich die Spannmutter beim Betrieb des Handwerkzeuggeräts eher weiter festzieht, lässt sich die Spannmutter häufig nicht oder nur sehr schwer lösen. Daher wurde mit
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, bei einem gattungsgemäßen Handwerkzeuggerät den Synchronlauf von Werkzeug und Antriebsspindel weiter zu unterstützen.The present invention has for its object to further support in a generic hand tool synchronous running of the tool and drive spindle.
Diese Aufgabe wird bei einem Handwerkzeuggerät der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass der Stellkörper nachgiebig verformbar, jedoch im Wesentlichen inkompressibel ist, und dass in mindestens einem der Funktionsteile mindestens eine in Umfangsrichtung erstreckte Aussparung gebildet ist, in der der Stellkörper aufgenommen ist, und dass das andere Funktionsteil mit einem vorspringenden Bereich in axialer Richtung in die Aussparung eingreift, wodurch der Stellkörper in Umfangsrichtung einerseits von dem ersten Funktionsteil und andererseits von dem zweiten Funktionsteil begrenzt ist, so dass der Stellkörper bei einer Verdrehung des ersten Funktionsteils gegenüber dem zweiten Funktionsteil in Umfangsrichtung belastet und hierdurch auch in axiale Richtung verdrängt wird, und dass dabei der axiale Abstand zwischen dem ersten Funktionsteil und dem zweiten Funktionsteil vergrößert wird und somit der Anpressdruck auf das Werkzeug erhöht wird.This object is achieved in a hand tool of the type mentioned according to the invention that the adjusting body yieldable deformable, but is substantially incompressible, and that at least one circumferentially extending recess is formed in at least one of the functional parts, and that the other functional part engages with a projecting region in the axial direction in the recess, whereby the adjusting body is limited in the circumferential direction on the one hand by the first functional part and on the other hand by the second functional part, so that the actuating body with a rotation of the first functional part relative to the second functional part in Loaded circumferential direction and thereby displaced in the axial direction, and that while the axial distance between the first functional part and the second functional part is increased and thus the contact pressure on the tool is increased.
Wenn das Werkzeug und die Antriebsspindel nicht synchron laufen, beispielsweise beim Beschleunigen oder Verzögern der Antriebsspindel oder beim Verzögern des Werkzeugs infolge der Bearbeitung eines Werkstücks, überträgt das Werkzeug, aufgrund der Reibung zwischen dem Werkzeug und dem zweiten Funktionsteil, zumindest teilweise seine Bewegung auf das zweite Funktionsteil. Dies führt zu einer Relativbewegung des zweiten Funktionsteils bezüglich des ersten Funktionsteils. Hierdurch bewegt sich der vorspringende Bereich des einen Funktionsteils innerhalb der Aussparung des anderen Funktionsteils und drückt gegen den Stellkörper. Der Stellkörper weicht derart belastet in axiale Richtung aus und drückt seinerseits gegen das zweite Funktionsteil, was zu einer Vergrößerung des axialen Abstands zwischen dem ersten und dem zweiten Funktionsteil und somit zu einer Erhöhung der Klemmkraft auf das Werkzeug führt, um wieder einen Synchronlauf zu erzwingen.If the tool and the drive spindle are not synchronized, for example when accelerating or decelerating the drive spindle or when decelerating the tool due to the machining of a workpiece, the tool, due to the friction between the tool and the second functional part, at least partially transmits its movement to the second functional part. This leads to a relative movement of the second functional part with respect to the first functional part. As a result, the projecting portion of the one functional part moves within the recess of the other functional part and presses against the actuating body. The actuating body deviates so loaded in the axial direction and in turn pushes against the second functional part, which leads to an increase in the axial distance between the first and the second functional part and thus to an increase of the clamping force on the tool to force a synchronous operation again.
Der Stellkörper ist im Wesentlichen inkompressibel. Unter "im Wesentlichen inkompressibel" wird verstanden, dass der Stellkörper bei einer Krafteinwirkung nicht oder nur wenig komprimiert wird. Er lässt sich aber nachgiebig verformen, sofern ein Freiheitsgrad hierfür zur Verfügung steht.The actuator is essentially incompressible. By "substantially incompressible" is meant that the actuator body is not or only slightly compressed at a force. It can be deformed yielding, provided that a degree of freedom is available.
Es erweist sich als vorteilhaft, wenn das erste Funktionsteil und das zweite Funktionsteil automatisch in die unverdrehte Grundstellung zurückführbar sind. Bevorzugt werden das erste Funktionsteil und das zweite Funktionsteil immer dann automatisch in die unverdrehte Ausgangsstellung zurückgeführt, wenn das Werkzeug und die Antriebsspindel (wieder) synchron laufen und das System dabei unbelastet ist; das Werkzeug also beispielsweise nicht durch die Bearbeitung eines Werkstücks gebremst wird oder die Antriebsspindel verzögert wird.It proves to be advantageous if the first functional part and the second functional part can be automatically returned to the untwisted basic position. Preferably, the first functional part and the second functional part are always automatically returned to the non-rotated starting position when the tool and the drive spindle (again) run synchronously and the system is unloaded; For example, the tool is not slowed down by the machining of a workpiece or the drive spindle is decelerated.
Es erweist sich als vorteilhaft, wenn der Stellkörper ein im Wesentlichen elastisch verformbares Material umfasst. Hierdurch ist gewährleistet, dass der Stellkörper, wenn keine Kräfte auf ihn einwirken, seine Ausgangsform und Ausgangslage einnimmt.It proves to be advantageous if the adjusting body comprises a substantially elastically deformable material. This ensures that the adjusting body, if no forces act on him, assumes its initial shape and starting position.
Es ist grundsätzlich denkbar, dass der Stellkörper einen inkompressiblen Kern, der beispielsweise durch Wasser oder Hydraulikflüssigkeit gebildet ist, und eine Hülle aufweist.It is conceivable in principle that the adjusting body has an incompressible core, which is formed, for example, by water or hydraulic fluid, and a casing.
Das im Wesentlichen elastisch verformbare Material umfasst in Weiterbildung der Erfindung ein elastisches Polymer.The substantially elastically deformable material comprises a further development of the invention, an elastic polymer.
In Weiterbildung der Erfindung umfasst der Stellkörper ein Hydraulikelement, insbesondere ein mit Hydraulikflüssigkeit gefülltes Element. Der Stellkörper kann beispielsweise zwei Stempel umfassen, wobei ein Stempel in Umfangsrichtung und der andere Stempel in axialer Richtung angeordnet ist, wobei das Einfahren des einen Stempels zu einem Ausfahren des anderen Stempels führt.In a further development of the invention, the adjusting body comprises a hydraulic element, in particular a filled with hydraulic fluid element. The adjusting body may, for example, comprise two punches, wherein one punch is arranged in the circumferential direction and the other punch in the axial direction, wherein the retraction of one punch leads to an extension of the other punch.
Es erweist sich als vorteilhaft, wenn der in axiale Richtung vorspringende Bereich des einen Funktionsteils in Umfangsrichtung einerseits am Stellkörper und andererseits am anderen Funktionsteil anliegt, wenn das erste Funktionsteil gegenüber dem zweiten Funktionsteil unverdreht ist, sich also in der unverdrehten Grundstellung befindet. Dabei kann das eine Funktionsteil an einem Ende der Aussparung anliegen. Dieses Ende der Aussparung bildet dann zugleich einen Anschlag für das eine Funktionsteil. Bei einer derartigen Ausbildung der Spannvorrichtung des Handwerkzeuggeräts lässt die Spannvorrichtung eine Relativbewegung beider Funktionsteile in nur eine Richtung zu.It proves to be advantageous if the axially projecting portion of a functional part rests in the circumferential direction on the one hand on the actuating body and on the other functional part, when the first functional part is not rotated relative to the second functional part, that is in the untwisted basic position. In this case, the one functional part can rest on one end of the recess. This end of the recess then forms at the same time a stop for the one functional part. With such a design of the clamping device of the hand tool device, the clamping device allows a relative movement of the two functional parts in only one direction.
Nach einem weiteren Erfindungsgedanken liegt der in axiale Richtung vorspringende Bereich des einen Funktionsteil in Umfangsrichtung beiderseits jeweils an einem Stellkörper an, wenn das erste Funktionsteil gegenüber dem zweiten Funktionsteil unverdreht ist. Hierdurch ist gewährleistet, dass sich beide Funktionsteile relativ zueinander begrenzt verdrehen lassen. Dadurch wird der Anpressdruck auf das Werkzeug immer dann erhöht, wenn ein Schlupf zur Antriebsspindel gegeben ist (Vorauseilen oder Nachlaufen des Werkzeugs bezüglich der Antriebsspindel).According to a further inventive idea lies in the axial direction projecting portion of a functional part in Circumferential direction on both sides in each case on a control element, when the first functional part is not rotated relative to the second functional part. This ensures that both functional parts can rotate limited relative to each other. As a result, the contact pressure on the tool is always increased when a slip is given to the drive spindle (leading or trailing the tool with respect to the drive spindle).
Es erweist sich ferner als vorteilhaft, wenn die Spannvorrichtung auf der der Spannmutter zugewandten Seite des Werkzeugs oder auf der der Spannmutter abgewandten Seite des Werkzeugs angeordnet ist oder wenn auf beiden Seiten des Werkzeugs jeweils eine Spannvorrichtung angeordnet ist. Ist die Spannvorrichtung so ausgebildet, dass sie eine Relativbewegung des ersten Funktionsteils zum zweiten Funktionsteil in nur eine Richtung zulässt, erweist es sich als vorteilhaft, auf beiden Seiten des Werkzeugs jeweils eine Spannvorrichtung mit gegensinniger Orientierung vorzusehen.It also proves to be advantageous if the clamping device is arranged on the clamping nut facing side of the tool or on the side facing away from the clamping nut of the tool or when a clamping device is arranged on both sides of the tool. If the tensioning device is designed such that it permits a relative movement of the first functional part to the second functional part in only one direction, it proves to be advantageous to provide a tensioning device with opposite orientation on both sides of the tool.
Nach einem weiteren Erfindungsgedanken spannt der Stellkörper die Spannvorrichtung in eine unverdrehte Grundstellung vor. Hierdurch wird gewährleistet, dass die Spannvorrichtung, wenn sich das erste Funktionsteil und das zweite Funktionsteil nicht relativ zueinander bewegen, minimalen axialen Abstand aufweist. Dadurch wird eine automatische Entlastungsvorrichtung gebildet, die das Abschrauben der Spannmutter von der Antriebsspindel erleichtert.According to a further inventive concept, the actuating body biases the tensioning device into an unrotated basic position. This ensures that, when the first functional part and the second functional part do not move relative to one another, the tensioning device has a minimum axial distance. Thereby, an automatic unloading device is formed, which facilitates the unscrewing of the clamping nut of the drive spindle.
Darüber hinaus erweist es sich als vorteilhaft, wenn das zweite Funktionsteil topfförmig ausgebildet ist und als Außenwand einen hohlzylindrischen Abschnitt aufweist.In addition, it proves to be advantageous if the second functional part is cup-shaped and has a hollow cylindrical portion as the outer wall.
In Weiterbildung des Erfindungsgedankens weist das erste Funktionsteil zentrisch eine unrunde Öffnung auf, mit der es an einem komplementär zu der unrunden Öffnung ausgebildeten Abschnitt der Antriebsspindel drehfest anordenbar ist. Hierdurch ist auf einfache Weise gewährleistet, dass das erste Funktionsteil und die Antriebsspindel drehfest miteinander verbunden sind.In a further development of the inventive concept, the first functional part has a non-circular opening centrally, with which it can be arranged in a rotationally fixed manner on a section of the drive spindle which is complementary to the non-circular opening. This ensures in a simple manner that the first functional part and the drive spindle are rotatably connected to each other.
Schließlich erweist es sich als vorteilhaft, wenn das erste Funktionsteil in den hohlzylindrischen Abschnitt des zweiten Funktionsteils einsteckbar ist, und wenn ein Haltemittel, insbesondere ein Sprengring, vorgesehen ist, das in eine Umfangsnut in der Innenwand des hohlzylindrischen Abschnitts des zweiten Funktionsteils eingreift und die axiale Bewegbarkeit des ersten Funktionsteils begrenzt. Hierdurch ist es möglich, dass die Spannvorrichtung vormontierbar ist, wodurch die Handhabung des Handwerkzeuggeräts für einen Benutzer erleichtert ist.Finally, it proves to be advantageous if the first functional part in the hollow cylindrical portion of the second functional part can be inserted, and if a holding means, in particular a snap ring, is provided which engages in a circumferential groove in the inner wall of the hollow cylindrical portion of the second functional part and the axial Mobility of the first functional part limited. This makes it possible that the clamping device is pre-assembled, whereby the handling of the power tool is easier for a user.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den beigefügten Patentansprüchen und der zeichnerischen Darstellung und nachfolgenden Beschreibung einer Ausführungsform der Erfindung.Further features, details and advantages of the invention will become apparent from the appended claims and the drawings and the following description of an embodiment of the invention.
In der Zeichnung zeigt:
- Figur 1
- eine explosionsartige, räumliche Darstellung eines erfindungsgemäßen Handwerkzeuggeräts;
Figur 2- eine Seitenansicht des Handwerkzeuggeräts nach
Figur 1 ; - Figur 3
- eine Seitenansicht einer erfindungsgemäßen Spannvorrichtung eines erfindungsgemäßen Elektrohandwerkzeuggeräts;
Figur 4- eine Draufsicht auf die Spannvorrichtung gemäß
Figur 3 ; - Figur 5
- eine Schnittansicht mit Schnittebene I-I gemäß
Figur 3 ; und Figur 6- eine Schnittansicht mit Schnittebene II-II gemäß
Figur 5 .
- FIG. 1
- an exploded, spatial representation of a hand tool according to the invention;
- FIG. 2
- a side view of the hand tool according to
FIG. 1 ; - FIG. 3
- a side view of a clamping device according to the invention of an electric hand tool device according to the invention;
- FIG. 4
- a plan view of the clamping device according to
FIG. 3 ; - FIG. 5
- a sectional view with section plane II according to
FIG. 3 ; and - FIG. 6
- a sectional view with section plane II-II according to
FIG. 5 ,
Die
Der Stellkörper 18 ist nachgiebig verformbar, jedoch im Wesentlichen inkompressibel und in einer in Umfangsrichtung erstreckten Aussparung 22 (s.
Bei einer Verdrehung des ersten Funktionsteils 14 gegenüber dem zweiten Funktionsteil 16 in Richtung des Pfeils 28 (s.
Ein Verdrehen des ersten Funktionsteils 14 bezüglich des zweiten Funktionsteils 16 kann sich ergeben, wenn das Werkzeug 8 und die Antriebsspindel 4 nicht synchron zueinander, sondern schlupfbehaftet zueinander laufen, etwa wenn das Werkzeug 8 bei der Bearbeitung eines Werkstücks gebremst wird oder bei einem Spindelstopp trägheitsbedingt weiterläuft. In diesem Fall wird durch die Spannvorrichtung 12 der Anpressdruck auf das Werkzeug in der beschriebenen Weise erhöht und ein Synchronlauf von Werkzeug 8 und Antriebsspindel 4 erzwungen.A rotation of the first
Das zweite Funktionsteil 16 ist topfförmig ausgebildet und weist einen hohlzylindrischen Abschnitt 34 als Außenwand auf. Das erste Funktionsteil 14 ist in den hohlzylindrischen Abschnitt 34 des zweiten Funktionsteils 16 einsteckbar und mittels eines als Sprengring 36 ausgebildeten Haltemittels 38, der in eine Umfangsnut 40 einclipsbar ist, verliersicher im zweiten Funktionsteil 16 gehalten. Die Spannvorrichtung 12 bildet eine vormontierbare Einheit.The second
Aus
Nach der Spannvorrichtung 12 wird das Werkzeug 8 auf die Antriebsspindel 4 aufgeschoben und mittels der Spannmutter 10, die auf die Antriebsspindel aufschraubbar ist, drehfest geklemmt.After the
Anhand der
Wenn das Werkzeug 8 und die Antriebsspindel 4 wieder synchron laufen und das Werkzeug 8 dabei nicht durch das Bearbeiten eines Werkstückes gebremst wird, wird vom Nocken 24 keine Kraft mehr auf den Stellkörper 18 übertragen. Aufgrund seiner elastischen Eigenschaft wird dann der Stellkörper 18 zurück in die Aussparung 22 des zweiten Funktionsteils 16 gedrückt, was zu einer Reduzierung des axialen Abstands 20 führt. Gleichzeitig wird dadurch die Anpresskraft auf das Werkzeug 8 reduziert, so dass die Spannmutter 10 vorzugsweise manuell von der Antriebsspindel 4 abgeschraubt werden kann. Die Spannvorrichtung 12 wirkt so als Entlastungsvorrichtung.When the
In entsprechender Weise kann die Spannvorrichtung 12 so ausgebildet sein, dass sie einen Synchronlauf zwischen Werkzeug 8 und Antriebsspindel 4 erzwingt, wenn das Werkzeug 8 der Antriebsspindel 4 vorauseilt, beispielsweise bei einem Stillsetzen der Antriebsspindel. Solchenfalls ist der Nocken 24 in der unverdrehten Grundstellung am anderen Ende der Aussparung 22 und entsprechend auf der anderen Seite des Stellkörpers 18 anzuordnen. Die gleiche Wirkung wird allerdings auch dadurch erzielt, wenn die Spannvorrichtung 12 auf der anderen Seite des Werkzeugs so angeordnet wird, dass sie mit dem zweiten Funktionsteil 16 am Werkzeug 8 und mit dem ersten Funktionsteil 14 an der Spannmutter 10 anliegt.In a corresponding manner, the clamping
Claims (12)
- Hand tool device (2) having a drive spindle (4), which has a tool flange (6) for a flat tool (8) which can be driven in a rotating manner, having a clamping nut (10), which can be screwed onto the free end of the drive spindle (4) and clamps the tool (8) in a torque-proof manner against the tool flange (6), and having a clamping device (12), which has a first function part (14) and a second function part (16), the axial distance (20) between which can be altered, wherein the first function part (14) is connected in a torque-proof manner to the drive spindle (4) and the second function part (16) abuts on the tool (8) and can be rotated in a limited manner relative to the first function part (14), wherein at least one adjusting body (18) is arranged between the first function part (14) and the second function part (16), by means of which the axial distance (20) between the first function part (14) and the second function part (16) is determined, characterised in that the adjusting body (18) is resiliently deformable but is essentially incompressible, and in that in at least one of the function parts (14, 16) at least one hollow (22) is formed extended in the circumferential direction (28), in which the adjusting body (18) is received, and in that the other function part (14, 16) engages with a projecting area (26) in the axial direction with the hollow (22), whereby the adjusting body (18) in the circumferential direction (28) is limited on one side by the first function part (14) and on the other side by the second function part (16), so that the adjusting body (18) is stressed when the first function part (14) is turned with respect to the second function part (16) in the circumferential direction (28) and as a result of this is also displaced in the axial direction, and in that the axial distance (20) between the first function part (14) and the second function part (16) is increased and hence the clamping pressure on the tool (8) is increased.
- Hand tool device (2) according to Claim 1, characterised in that the first function part (14) and the second function part (16) can be automatically restored to the unturned initial position.
- Hand tool device (2) according to Claim 1 or 2, characterised in that the adjusting body (18) comprises an essentially elastically deformable material.
- Hand tool device (2) according to any one of the preceding claims, characterised in that the essentially elastically deformable material comprises an elastic polymer.
- Hand tool device (2) according to any one of the preceding claims, characterised in that the adjusting body (18) comprises a hydraulic element, in particular an element filled with hydraulic fluid.
- Hand tool device (2) according to any one of the preceding claims, characterised in that the area (26), projecting in the axial direction, of the one function part (14, 16) in the circumferential direction (28) abuts on one side on the adjusting body (18) and on the other side on the other function part (14, 16), if the first function part (14) is unturned with respect to the second function part (16).
- Hand tool device (2) according to any one of the preceding Claims 1 to 4, characterised in that the area (26), projecting in the axial direction, of the one function part (14, 16) in the circumferential direction (28) abuts on both sides in each case on an adjusting body (18), if the first function part (14) is unturned with respect to the second function part (16).
- Hand tool device (2) according to any one of the preceding claims, characterised in that the clamping device (12) is arranged on the side of the tool (8) facing the clamping nut (10) or on the side of the tool (8) facing away from the clamping nut (10), or in that on both sides of the tool (8) a clamping device (12) is in each case arranged.
- Hand tool device (2) according to any one of the preceding claims, characterised in that the adjusting body (18) pre-tensions the clamping device (12) into an unturned initial position.
- Hand tool device (2) according to any one of the preceding claims, characterised in that the second function part (16) is of pot-shaped design and has a hollow cylindrical section (34) as an outer wall.
- Hand tool device (2) according to any one of the preceding claims, characterised in that the first function part (14) centrically has a non-circular opening (30), by means of which it can be arranged in a torque-proof manner on a section (32) of the drive spindle (4) which is designed to be complementary to the non-circular opening (30).
- Hand tool device (2) according to either of the preceding Claims 10 and 11, characterised in that the first function part (14) can be inserted into the hollow cylindrical section (34) of the second function part (16), and in that a retaining means (38), in particular a snap-in ring (36), is provided which engages with a circumferential groove in the inner wall of the hollow cylindrical section (34) of the second function part (16) and limits the axial movability of the first function part (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20080019064 EP2181804B1 (en) | 2008-10-31 | 2008-10-31 | Hand tool device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20080019064 EP2181804B1 (en) | 2008-10-31 | 2008-10-31 | Hand tool device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2181804A1 EP2181804A1 (en) | 2010-05-05 |
EP2181804B1 true EP2181804B1 (en) | 2011-09-21 |
Family
ID=40382243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20080019064 Active EP2181804B1 (en) | 2008-10-31 | 2008-10-31 | Hand tool device |
Country Status (1)
Country | Link |
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EP (1) | EP2181804B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012010828A1 (en) * | 2012-06-01 | 2013-12-05 | Festool Group Gmbh & Co. Kg | System with a hand machine tool and a plate tool |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3824040C1 (en) | 1987-02-21 | 1989-11-23 | Robert Bosch Gmbh, 7000 Stuttgart, De | Clamping device for axially clamping a tool, in particular a disk |
DE4031725A1 (en) * | 1990-10-06 | 1992-04-09 | Bosch Gmbh Robert | QUICK-RELEASE DEVICE, IN PARTICULAR FOR FASTENING DISC-SHAPED TOOLS ON A DRIVE SPINDLE OF A HAND TOOL |
US6682284B2 (en) * | 2002-06-04 | 2004-01-27 | Power Network Industry Co., Ltd | Nut having locking mechanism and low operating torque requirement |
DE102004024959A1 (en) * | 2004-05-22 | 2005-12-15 | Narex Česká Lípa a.s. | Clamping device for clamping an object against a stop |
-
2008
- 2008-10-31 EP EP20080019064 patent/EP2181804B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP2181804A1 (en) | 2010-05-05 |
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