EP1952953B1 - Hand-tool for drilling and/or screwing - Google Patents
Hand-tool for drilling and/or screwing Download PDFInfo
- Publication number
- EP1952953B1 EP1952953B1 EP07002357A EP07002357A EP1952953B1 EP 1952953 B1 EP1952953 B1 EP 1952953B1 EP 07002357 A EP07002357 A EP 07002357A EP 07002357 A EP07002357 A EP 07002357A EP 1952953 B1 EP1952953 B1 EP 1952953B1
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- European Patent Office
- Prior art keywords
- turret
- coupling
- locking element
- rotation
- locking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
Definitions
- the invention relates to a motor-driven hand tool for drilling and / or screws according to the preamble of independent claim 1, with a housing in which on the one hand a motor drive connected thereto, rotatably mounted drive shaft is provided and on the other hand, a turret by means of a Drehlagerung is arranged, which is provided with at least two drivable coupling heads, which can be pivoted both in a driven active position and in a non-driven parking position, wherein the drive shaft is connected via at least one intermediate element with a first coupling part in the turret and wherein each coupling head in each case a second coupling part is associated, which is in the active position of this coupling head in engagement with the first coupling part and which is not in the parked position of this coupling head in engagement with the first coupling part, wherein a Ve locking device is provided which prevents unintentional rotation of the turret and for each coupling head provided on the turret associated recesses and a locking element provided on the housing comprises
- the object of the invention is to avoid the aforementioned disadvantages and to provide a hand tool of the aforementioned type, which allows a rotation of the turret without complex release of the locking element.
- the coupling of the motor drive controlling switch with the locking element so be configured such that actuation of the actuating surface of the switch is only possible when one of the coupling heads of the turret is in its driven active position and the locking element is displaced into the locking position or is already in its locking position, so that activation of the drive is not possible with not secured against rotation turret and additional operation of a separate actuator for the locking element is not required.
- the coupling of the motor drive controlling switch with the locking element may be configured such that with a first partial stroke of the switch, the locking element is displaced into its locking position and only by a further stroke of the switch, the activation / control of the motor drive, so that can be freely rotated without operating the switch, the turret.
- the actuating device with the power switch may also be coupled such that the locking element engages only a part far in the recess with actuation of the switch, in particular completely, into the recess, so that already before actuation of the Switch can be given a fuse against twisting.
- the locking element can be automatically brought by a restoring force automatically at least a piece into the recess when the turret has been brought with one of its coupling heads in a required locking position for operation.
- the power switch may have an actuating surface opposite the further actuating surface for pressurizing in one of the required for the engine activation actuation opposite direction, wherein the further actuating surface is coupled to the locking element such that upon pressing the further actuating surface, the locking element from its locking position to its rotational position is displaced and no longer engages in one of the recesses, so that the turret is normally secured against rotation and indeed an active release of the locking element is required, but this does not require releasing the handle of the hand tool.
- At least one coupling head can be configured as a drill chuck and at least one coupling head as a receptacle for a screw bit, wherein a reduction gear, in particular in the form of a planetary gear, is provided between the coupling head designed as a receptacle for a screw bit and the second coupling part assigned to it Changing the engine control or switching a in the housing (and not in the turret) provided gear is not required, which allows a technically simpler design.
- the coupling head designed as a receptacle for a screw bit can have a torque limiter, in particular in the form of a slip clutch, so that overloading during screwing is avoided and damage to the screw bit and / or the screw to be turned is avoided.
- the axis of rotation B of the first coupling part can be provided in an angle deviating from the vertical on the plane of rotation A of the turret, so that the axis of rotation B of the first coupling part is neither aligned with the axis of rotation A of the turret nor parallel to this (offset).
- the axis of rotation B may be aligned parallel to the axis of rotation A of the turret and performed by a provided within the pivot bearing recess.
- Fig. 1 shows a power tool 1, which can be used both for drilling and for screwing.
- the hand tool 1 comprises a housing 2, which in the illustrated embodiment - as from Fig. 2 also visible - consists of two lateral part halves.
- a motor drive 3 is provided, to which a rotatably mounted drive shaft 4 is connected.
- the housing 2 comprises a handle region 5 and a front working region 6, which is provided with a revolving around a rotation axis A turret 7.
- the turret 7 in turn in the illustrated embodiment comprises two drivable coupling heads 8a and 8b, of which the coupling head 8a is formed as a chuck and the coupling head 8b as a receptacle for a screw bit not shown in the drawing.
- the drive shaft 4 is connected via a formed in the illustrated embodiment as an intermediate drive shaft intermediate element 9 with a trained as a bevel gear first coupling part 10, wherein the intermediate element from the housing 2 extends into the turret 7 and the first coupling part 10 is arranged in the turret 7.
- Each of the two rotatably mounted coupling heads 8a and 8b in turn comprises a likewise formed as a bevel gear second coupling part 11, which is then in engagement with the first coupling part 10 when the corresponding coupling head 8a and 8b is in its active position for use.
- the second coupling part 11 of the coupling head not in use (in the illustrated embodiment, the coupling head 8 b) is not in engagement with the first coupling part 10.
- a locking device which prevents unintentional rotation of the turret 7.
- an associated recess 12 is provided on the turret 7 for each coupling head and on the housing 2, a locking element 13 is arranged, the releasing between a 12 engaging in one of the recesses 12 locking position and the recesses 12 and thus allow a rotation of the turret 7 Rotary position is displaced.
- the locking element 13 displaced by an actuating device from the locking position to the rotational position, wherein in the illustrated embodiment, the actuating device is formed by the power switch 14, which controls the motor drive 3 of the hand tool 1.
- the coupling of the switch 14 with the locking element 13 is designed such that on the one hand actuation of the actuating surface 15 of the switch 14 is only possible if one of the coupling heads 8a and 8b of the turret 7 is in its active and thus drivable position and Thus, the locking element 13 is located in the associated recess 12 of the corresponding coupling head 8a and 8b.
- this further actuating surface 16 of the switch 14 is coupled to the locking element 13 such that upon pressing the further actuating surface 16, the locking element 13 is displaced from its locking position in its rotational position and then no longer einsammlung in one of the recesses 12, so that Turret 7 is then freely rotatable.
- this displacement to release against a restoring force for example, caused by a spring or the like, take place, so that upon reaching a recess 12, the locking element 13 is automatically displaced into at least a partial area in this recess 12 and thus an automatic locking takes place.
- a restoring force for example, caused by a spring or the like
- this connecting element is a plastic strip that can be bent, but otherwise has a relatively high rigidity, which is formed integrally with the power switch 14 and the locking element 13 and thus also comprises the actuating surface 15 and the further actuating surface 16.
- a reduction gear 17 is assigned in the illustrated embodiment, which is provided between the coupling head 8b and the associated second coupling member 11 and the high speed of the motor drive 3 lowers to a lower speed.
- this coupling head 8b has a torque limitation, which may be designed in particular in the form of a slip clutch.
Abstract
Description
Die Erfindung betrifft ein motorisch angetriebenes Handwerkzeug zum Bohren und/oder Schrauben gemäß dem Oberbegriff des unabhängigen Anspruchs 1, mit einem Gehäuse, in dem zum einen ein motorischer Antrieb mit daran angeschlossener, drehbar gelagerte Antriebswelle vorgesehen ist und an dem zum anderen ein Revolverkopf mittels einer Drehlagerung angeordnet ist, der mit zumindest zwei antreibbaren Kupplungsköpfen versehen ist, die sowohl in eine angetriebene aktive Position als auch in eine nicht angetriebene Parkposition verschwenkt werden können, wobei die Antriebswelle über zumindest ein Zwischenelement mit einem ersten Kupplungsteil im Revolverkopf verbunden ist und wobei jedem Kupplungskopf jeweils ein zweites Kupplungsteil zugeordnet ist, welches sich in der aktiven Position dieses Kupplungskopfes in Eingriff mit dem ersten Kupplungsteil befindet und welches sich in der Parkposition dieses Kupplungskopfes nicht in Eingriff mit dem ersten Kupplungsteil befindet, wobei eine Verriegelungseinrichtung vorgesehen ist, die ein unbeabsichtigtes Verdrehen des Revolverkopfes verhindert und für jeden Kupplungskopf eine an dem Revolverkopf vorgesehene zugeordnete Aussparungen sowie ein an dem Gehäuse vorgesehenes Verriegelungselement umfasst, wobei das Verriegelungselement zwischen einer in eine Aussparung eingreifenden und damit ein Verdrehen des Revolverkopfes verhindernden Verriegelungsposition und einer die Aussparung(en) freigebenden und ein Verdrehen des Revolverkopfes ermöglichenden Drehposition verlagerbar ist, wobei das Verriegelungselement durch eine Betätigungseinrichtung aus der Verriegelungsposition in die Drehposition verlagerbar ist.The invention relates to a motor-driven hand tool for drilling and / or screws according to the preamble of independent claim 1, with a housing in which on the one hand a motor drive connected thereto, rotatably mounted drive shaft is provided and on the other hand, a turret by means of a Drehlagerung is arranged, which is provided with at least two drivable coupling heads, which can be pivoted both in a driven active position and in a non-driven parking position, wherein the drive shaft is connected via at least one intermediate element with a first coupling part in the turret and wherein each coupling head in each case a second coupling part is associated, which is in the active position of this coupling head in engagement with the first coupling part and which is not in the parked position of this coupling head in engagement with the first coupling part, wherein a Ve locking device is provided which prevents unintentional rotation of the turret and for each coupling head provided on the turret associated recesses and a locking element provided on the housing comprises, wherein the locking element between an engaging in a recess and thus a Rotation of the turret preventing locking position and the recess (s) releasing and a rotation of the turret enabling rotational position is displaceable, wherein the locking element is displaced by an actuating device from the locking position to the rotational position.
Aus der Praxis sind derartige Handwerkzeuge bekannt, mit denen durch Drehung des Revolverkopfes ein Bohren und anschließendes Schrauben ohne Austausch des eingespannte Bohrers gegen ein Schraubbit erfolgen kann. Ein solches Handwerkzeug ist beispielsweise in der
Nachteilig hierbei ist, dass für das Verdrehen des Revolverkopfes das Deaktivieren der Verdrehsicherung durch Verlagerung des Verriegelungselements aus der Verriegelungsposition in die Drehposition erfolgen muss, was regelmäßig ein Umgreifen erfordert und damit die Handhabung unnötig aufwändig gestaltet.The disadvantage here is that for the rotation of the turret deactivating the rotation must be made by displacement of the locking element from the locking position to the rotational position, which regularly requires a grasping and thus makes the handling unnecessarily complex.
Aufgabe der Erfindung ist es, die vorgenannten Nachteile zu vermeiden und ein Handwerkzeug der vorgenannten Art anzugeben, das ein Verdrehen des Revolverkopfes ohne aufwändiges Lösen des Verriegelungselements ermöglicht.The object of the invention is to avoid the aforementioned disadvantages and to provide a hand tool of the aforementioned type, which allows a rotation of the turret without complex release of the locking element.
Diese Aufgabe wird gemäß Anspruch 1 dadurch gelöst, dass der den motorischen Antrieb steuernde Einschalter derart mit dem Verriegelungselement gekoppelt ist, dass der Einschalter ebenfalls als Betätigungselement für die Verlagerung des Verriegelungselements zwischen der Verriegelungsposition und der Drehposition ausgebildet ist, so dass sich die Handhabung des Handwerkzeug einfacher gestaltet.This object is achieved according to claim 1, characterized in that the motor drive controlling power switch is coupled to the locking element, that the power switch is also formed as an actuator for the displacement of the locking element between the locking position and the rotational position, so that the handling of the hand tool designed simpler.
Weiterhin ist als ein Zwischenelement eine im Bereich der Drehlagerung des Revolverkopfes in den Revolverkopf hineingehende Zwischenantriebswelle vorgesehen, deren im Gehäuse befindliches Ende von der Antriebswelle angetrieben wird und deren im Revolverkopf befindliches Ende mit einem Kegelrad als ersten Kupplungsteil verbunden, insbesondere versehen ist, dessen Drehachse B nicht mit der Drehachse A der Drehlagerung des Revolverkopfes fluchtet, so dass dieses Kegelrad nicht auf der Drehachse A der Drehlagerung des Revolverkopfes angeordnet ist, und dass zum anderen das jeweilige zweite Kupplungsteil der Kupplungsköpfe als Kegelzahnrad ausgebildet ist, wobei das erste Kupplungsteil und die zweiten Kupplungsteile sowie die Position und Ausrichtung der Zwischenwelle so vorgesehen sind, dass nur das zweite Kupplungsteil des in der aktiven Position befindlichen Kupplungskopfes mit dem ersten Kupplungsteil in Eingriff ist.Furthermore, as an intermediate element in the area of the pivot bearing of Turret provided in the turret inboard intermediate drive shaft, whose located in the housing end is driven by the drive shaft and whose located in the turret end connected to a bevel gear as the first coupling part, in particular is provided whose axis of rotation B is not aligned with the axis of rotation A of the rotary bearing of the turret, so that this bevel gear is not arranged on the rotational axis A of the rotary bearing of the turret, and that, on the other hand, the respective second coupling part of the coupling heads is formed as a bevel gear, wherein the first coupling part and the second coupling parts and the position and orientation of the intermediate shaft are provided so that only the second coupling part of the located in the active position coupling head with the first coupling part is engaged.
Hierdurch wird bei Verdrehen des Revolverkopfes das zweite Kupplungsteil des bisher in der aktiven Position befindlichen Kupplungskopfes, welches sich bisher im Eingriff mit dem ersten Kupplungsteil befunden hat, aus diesem Eingriff heraus verschwenkt und somit automatisch ausgekuppelt. Durch Drehen eines weiteren Kupplungskopfes in die aktive Position wird dann dessen zweites Kupplungsteil in Eingriff mit dem ersten Kupplungsteil gebracht und somit automatisch eingekuppelt.As a result, upon rotation of the turret, the second coupling part of the previously located in the active position coupling head, which was previously engaged with the first coupling part, pivoted out of this engagement and thus automatically disengaged. By turning a further coupling head in the active position then the second coupling part is brought into engagement with the first coupling part and thus automatically engaged.
Dabei kann die Kopplung des den motorischen Antrieb steuernden Einschalters mit dem Verriegelungselement derart ausgestaltet sein, dass eine Betätigung der Betätigungsfläche des Einschalters nur dann möglich ist, wenn sich einer der Kupplungsköpfe des Revolverkopfes in seiner angetriebenen aktiven Position befindet und das Verriegelungselement in die Verriegelungsposition verlagerbar ist oder sich bereits in seiner Verriegelungsposition befindet, so dass eine Aktivierung des Antriebs bei nicht gegen Verdrehen gesichertem Revolverkopf nicht möglich ist und eine zusätzliche Betätigung einer separaten Betätigungseinrichtung für das Verriegelungselement nicht erforderlich ist.In this case, the coupling of the motor drive controlling switch with the locking element so be configured such that actuation of the actuating surface of the switch is only possible when one of the coupling heads of the turret is in its driven active position and the locking element is displaced into the locking position or is already in its locking position, so that activation of the drive is not possible with not secured against rotation turret and additional operation of a separate actuator for the locking element is not required.
Auch kann die Kopplung des den motorischen Antrieb steuernden Einschalters mit dem Verriegelungselement derart ausgestaltet sein, dass mit einem ersten Teilhub des Einschalters das Verriegelungselement in seine Verriegelungsposition verlagert wird und erst durch einen weiteren Hub des Einschalters die Aktivierung/Steuerung des motorischen Antriebs erfolgt, so dass ohne Betätigung des Einschalters der Revolverkopf frei drehbar ist.Also, the coupling of the motor drive controlling switch with the locking element may be configured such that with a first partial stroke of the switch, the locking element is displaced into its locking position and only by a further stroke of the switch, the activation / control of the motor drive, so that can be freely rotated without operating the switch, the turret.
Weiterhin kann die Betätigungseinrichtung mit dem Einschalter auch derart gekoppelt sein, dass das Verriegelungselement bei noch nicht betätigtem Einschalter lediglich einen Teil weit in die Aussparung eingreift und durch Betätigung des Einschalters weiter, insbesondere vollständig, in die Aussparung hineinziehbar ist, so dass bereits vor Betätigung des Einschalters eine Sicherung gegen Verdrehen gegeben sein kann. Dabei kann das Verriegelungselement insoweit durch eine Rückstellkraft automatisch zumindest ein Stück in die Aussparung bringbar sein, wenn der Revolverkopf mit einem seiner Kupplungsköpfe in eine für den Betrieb erforderliche Verriegelungsposition gebracht worden ist.Furthermore, the actuating device with the power switch may also be coupled such that the locking element engages only a part far in the recess with actuation of the switch, in particular completely, into the recess, so that already before actuation of the Switch can be given a fuse against twisting. In this case, the locking element can be automatically brought by a restoring force automatically at least a piece into the recess when the turret has been brought with one of its coupling heads in a required locking position for operation.
Erfindungsgemäß kann der Einschalter eine der Betätigungsfläche gegenüberliegende weitere Betätigungsfläche zur Druckbeaufschlagung in einer der für die Motoraktivierung erforderliche Betätigung entgegen gesetzten Richtung aufweisen, wobei die weitere Betätigungsfläche mit dem Verriegelungselement derart gekoppelt ist, dass bei Drücken der weiteren Betätigungsfläche das Verriegelungselement aus seiner Verriegelungsposition in seine Drehposition verlagert wird und nicht mehr in eine der Aussparungen eingreift, so dass der Revolverkopf normalerweise gegen Verdrehen gesichert ist und zwar ein aktives Lösen des Verriegelungselements erforderlich ist, dies jedoch kein Loslassen des Griffs des Handwerkzeugs erfordert.According to the invention, the power switch may have an actuating surface opposite the further actuating surface for pressurizing in one of the required for the engine activation actuation opposite direction, wherein the further actuating surface is coupled to the locking element such that upon pressing the further actuating surface, the locking element from its locking position to its rotational position is displaced and no longer engages in one of the recesses, so that the turret is normally secured against rotation and indeed an active release of the locking element is required, but this does not require releasing the handle of the hand tool.
Vorteilhafterweise kann zumindest ein Kupplungskopf als Bohrfutter und wenigstens ein Kupplungskopf als Aufnahme für ein Schraubbit ausgebildet sein, wobei zwischen dem als Aufnahme für ein Schraubbit ausgebildeten Kupplungskopf und dem ihm zugeordneten zweiten Kupplungsteil ein Untersetzungsgetriebe, insbesondere in Form eines Planetengetriebes, vorgesehen ist, so dass eine Änderung der Motorsteuerung oder ein Umschalten eines im Gehäuse (und nicht im Revolverkopf) vorgesehenen Getriebes nicht erforderlich ist, was eine technisch einfachere Konstruktion ermöglicht.Advantageously, at least one coupling head can be configured as a drill chuck and at least one coupling head as a receptacle for a screw bit, wherein a reduction gear, in particular in the form of a planetary gear, is provided between the coupling head designed as a receptacle for a screw bit and the second coupling part assigned to it Changing the engine control or switching a in the housing (and not in the turret) provided gear is not required, which allows a technically simpler design.
Auch kann der als Aufnahme für ein Schraubbit ausgebildete Kupplungskopf eine Drehmomentbegrenzung, insbesondere in Form einer Rutschkupplung, aufweisen, so dass eine Überbelastung beim Schrauben vermieden und eine Beschädigung des Schraubbits und/oder der zu drehenden Schraube vermieden wird.Also, the coupling head designed as a receptacle for a screw bit can have a torque limiter, in particular in the form of a slip clutch, so that overloading during screwing is avoided and damage to the screw bit and / or the screw to be turned is avoided.
Dabei kann die Drehachse B des ersten Kupplungsteils in einem von der Lotrechten auf der Drehebene A des Revolverkopfes abweichenden Winkel vorgesehen sein, so dass die Drehachse B des ersten Kupplungsteils weder mit der Drehachse A des Revolverkopfes fluchtet noch zu dieser parallel (versetzt) ist.In this case, the axis of rotation B of the first coupling part can be provided in an angle deviating from the vertical on the plane of rotation A of the turret, so that the axis of rotation B of the first coupling part is neither aligned with the axis of rotation A of the turret nor parallel to this (offset).
Auch kann die Drehachse B parallel versetzt zur Drehachse A des Revolverkopfes ausgerichtet sein und durch eine innerhalb der Drehlagerung vorgesehene Aussparung durchgeführt sein.Also, the axis of rotation B may be aligned parallel to the axis of rotation A of the turret and performed by a provided within the pivot bearing recess.
Im Folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert. Es zeigen:
- Fig. 1
- Eine teilweise im Schnitt gehaltene Seitenansicht eines erfindungsgemäßen Handwerkzeuges und
- Fig. 2
- einen in perspektivischer Darstellung gehaltene Ansicht des Gegenstandes nach
Fig. 1 , wobei der Übersichtlichkeit halber alle die Kraftübertragung betreffenden Bauteile nicht dargestellt sind.
- Fig. 1
- A partially sectioned side view of a hand tool according to the invention and
- Fig. 2
- a perspective view of the object after
Fig. 1 , wherein for the sake of clarity, all the power transmission components are not shown.
In allen Figuren werden für gleiche bzw. gleichartige Bauteile übereinstimmende Bezugszeichen verwendet.In all figures the same reference numerals are used for identical or similar components.
In dem Gehäuse 2 ist ein motorischer Antrieb 3 vorgesehen, an den eine drehbar gelagerte Antriebswelle 4 angeschlossen ist. Das Gehäuse 2 umfasst einen Griffbereich 5 und einen vorderen Arbeitsbereich 6, der mit einem um eine Drehachse A drehbaren Revolverkopf 7 versehen ist.In the
Der Revolverkopf 7 umfasst wiederum im dargestellten Ausführungsbeispiel zwei antreibbare Kupplungsköpfe 8a und 8b, von denen der Kupplungskopf 8a als Bohrfutter und der Kupplungskopf 8b als Aufnahme für ein in der Zeichnung nicht dargestelltes Schraubbit ausgebildet ist.The
Die Antriebswelle 4 ist über ein im dargestellten Ausführungsbeispiel als Zwischenantriebswelle ausgebildetes Zwischenelement 9 mit einem als Kegelzahnrad ausgebildeten ersten Kupplungsteil 10 verbunden, wobei sich das Zwischenelement vom Gehäuse 2 bis in den Revolverkopf 7 erstreckt und das erste Kupplungsteil 10 im Revolverkopf 7 angeordnet ist. Jeder der beiden drehbar gelagerten Kupplungsköpfe 8a und 8b umfasst wiederum ein ebenfalls als Kegelzahnrad ausgebildetes zweites Kupplungsteil 11, welches sich dann in Eingriff mit dem ersten Kupplungsteil 10 befindet, wenn der entsprechende Kupplungskopf 8a und 8b sich in seiner aktiven Position zur Benutzung befindet.The drive shaft 4 is connected via a formed in the illustrated embodiment as an intermediate drive shaft
Hingegen ist das zweite Kupplungsteil 11 des nicht in Benutzung befindlichen Kupplungskopfes (im dargestellten Ausführungsbeispiel der Kupplungskopf 8b) nicht in Eingriff mit dem ersten Kupplungsteil 10.On the other hand, the
Weiterhin ist eine Verriegelungseinrichtung vorgesehen, die ein unbeabsichtigtes Verdrehen des Revolverkopfes 7 verhindert. Hierfür ist an dem Revolverkopf 7 für jeden Kupplungskopf eine zugeordnete Aussparung 12 vorgesehen und an dem Gehäuse 2 ist ein Verriegelungselement 13 angeordnet, das zwischen einer in eine der Aussparungen 12 eingreifenden Verriegelungsposition und einer die Aussparungen 12 freigebenden und damit ein Verdrehen des Revolverkopfes 7 ermöglichen, Drehposition verlagerbar ist. Für eine leichtere Bedienbarkeit ist das Verriegelungselement 13 durch eine Betätigungseinrichtung aus der Verriegelungsposition in die Drehposition verlagerbar, wobei im dargestellten Ausführungsbeispiel die Betätigungseinrichtung durch den Einschalter 14, welcher den motorischen Antrieb 3 des Handwerkzeuges 1 steuert, gebildet ist.Furthermore, a locking device is provided which prevents unintentional rotation of the
Die Kopplung des Einschalters 14 mit dem Verriegelungselement 13 ist dabei derart ausgestaltet, dass einerseits eine Betätigung der Betätigungsfläche 15 des Einschalters 14 nur dann möglich ist, wenn sich einer der Kupplungsköpfe 8a bzw. 8b des Revolverkopfes 7 in seiner aktiven und damit antreibbaren Position befindet und sich somit das Verriegelungselement 13 in die zugeordnete Aussparung 12 des entsprechenden Kupplungskopfes 8a bzw. 8b befindet.The coupling of the
Damit ist auch bei noch nicht betätigtem Einschalter 14 bereits eine Verriegelung gegeben, so dass der Revolverkopf 7 nicht drehbar ist. Wie auch aus
Im dargestellten Ausführungsbeispiel ist diese weitere Betätigungsfläche 16 des Einschalters 14 mit dem Verriegelungselement 13 derart gekoppelt, dass bei Drücken der weiteren Betätigungsfläche 16 das Verriegelungselement 13 aus seiner Verriegelungsposition in seiner Drehposition verlagert wird und dann nicht mehr in eine der Aussparungen 12 eingereift, so dass der Revolverkopf 7 dann frei drehbar ist.In the illustrated embodiment, this further actuating
Vorzugsweise kann diese Verlagerung zur Freigabe gegen eine Rückstellkraft, beispielsweise verursacht durch eine Feder oder dergleichen, erfolgen, so dass bei Erreichen einer Aussparung 12 das Verriegelungselement 13 automatisch zumindest mit einem Teilbereich in diese Aussparung 12 hinein verlagert wird und damit eine selbsttätige Verriegelung erfolgt. Dies ist insbesondere bei lediglich zwei Kupplungsköpfen 8a und 8b sinnvoll.Preferably, this displacement to release against a restoring force, for example, caused by a spring or the like, take place, so that upon reaching a
Die Kopplung des Einschalters 14 mit dem Verriegelungselement 13 ist dabei dadurch verwirklicht, dass der Einschalter 14 über ein Verbindungselement, dass sowohl Zugkräfte als auch Druckkräfte übertragen kann, mit dem Verriegelungselement 13 verbunden ist. Im dargestellten Ausführungsbeispiel handelt es sich bei diesem Verbindungselement um einen zwar verbiegbaren, aber ansonsten eine relativ hohe Steifigkeit aufweisenden Kunststoffstreifen, der einstückig mit dem Einschalter 14 und dem Verriegelungselement 13 ausgebildet ist und somit auch die Betätigungsfläche 15 und die weitere Betätigungsfläche 16 umfasst.The coupling of the
Dem als Aufnahme für ein Schraubbit ausgebildeten Kupplungskopf 8b ist im dargestellten Ausführungsbeispiel ein Untersetzungsgetriebe 17 zugeordnet, das zwischen dem Kupplungskopf 8b und dem ihm zugeordneten zweiten Kupplungsteil 11 vorgesehen ist und die hohe Drehzahl des motorischen Antriebs 3 auf eine niedrigere Drehzahl herabsenkt. Darüber hinaus weist dieser Kupplungskopf 8b eine Drehmomentbegrenzung auf, die insbesondere in Form einer Rutschkupplung ausgebildet sein kann.The designed as a receptacle for a screw
Claims (9)
- Motor-driven hand tool (1) for drilling and/or screwing operations, said hand tool including a housing (2) in which is provided, on the one hand, a motor-driven drive (3) with a rotatably mounted drive shaft (4) connected thereto and on which, on the other hand, is positioned a turret (7) by means of a pivot bearing arrangement, said turret being provided with at least two driveable coupling heads (8a, 8b), which can be pivoted both into a driven active position and a non-driven idle position, wherein the drive shaft (4) is connected to a first coupling .part (10) in the turret (7) by means of at least one intermediate element (9) and wherein each coupling head (8a, 8b) has associated respectively therewith a second coupling part (11), which engages with the first coupling part (10) in the active position of said coupling head (8a, 8b) and which does not engage with the first coupling part (10) in the idle position of said coupling head (8a, 8b), wherein there is provided a locking device which prevents unintentional rotation of the turret (7) and comprises for each coupling head (8a, 8b) an associated recess (12) that is provided on the turret (7) and a locking element (13) that is provided on the housing (2), wherein the locking element (13) is displaceable between a locking position engaging a recess (12) and consequently preventing rotation of the turret (7) and a rotating position releasing the recess (12) and enabling rotation of the turret (7), wherein the locking element (13) is displaceable from the locking position into the rotating position by means of an actuating device, characterized in that the closing switch (14) controlling the motor drive (3) is coupled to the locking element (13) in such a manner that the closing switch (14) also takes the form of an actuating element for the displacing of the locking element (13) between the locking position and the rotating position, wherein as an intermediate element an intermediate drive shaft is provided extending into the turret (7) in the region of the pivot bearing arrangement of the turret (7), the end of said intermediate drive shaft situated in the housing (2) being driven by the drive shaft (4) and its end situated in the turret (7) being connected to, or more especially being provided with, a bevel gear as the first coupling part (10), the axis of rotation B of which is not aligned with the axis of rotation A of the pivot bearing arrangement of the turret (7), such that the said bevel gear is not positioned on the axis of rotation A of the pivot bearing arrangement of the turret (7), and that, on the other hand, the respective second coupling part (11) of the coupling heads (8a, 8b) is in the form of a bevel gear, wherein the first coupling part (10) and the second coupling parts (11) and the position and alignment of the intermediate shaft are provided such that only the second coupling part (11) of the coupling head (8a, 8b) situated in the active position engages with the first coupling part (10).
- Hand tool (1) according to the preceding claim, characterized in that the coupling between the closing switch (14) controlling the drive (3) and the locking element (13) is developed in such a manner that it is only possible to actuate the actuating face (15) of the closing switch (14) if one of the coupling heads (8a, 8b) of the turret (7) is situated in its driven active position and the locking element (13) is displaceable into the locking position or is already situated in its locking position.
- Hand tool (1) according to one of the preceding claims, characterized in that the coupling between the closing switch (14) controlling the motor drive (3) and the locking element (13) is developed in such a manner that with a first part travel of the limit switch (14), the locking element (13) is displaced into its locking position and the activation/control of the motor drive (3) is only effected through a further travel of the closing switch (14).
- Hand tool (1) according to the preceding claim, characterized in that the actuating device is coupled with the closing switch (14) in such a manner that, with the closing switch (14) not yet actuated, the locking element (13) only engages a little way into the recess (12) and through actuation of the limit switch (14), is pulled further, more especially completely, into the recess (12).
- Hand tool (1) according to one of the preceding claims, characterized in that the closing switch (14) has a further actuating face (16), situated opposite the actuating face (15), for applying pressure in the opposing direction, wherein the further actuating face (16) is coupled with the locking element (13) in such a manner that when the further actuating face (16) is pressed, the locking element is displaced out of its locking position into its rotating position and no longer engages one of the recesses (12).
- Hand tool (1) according to one of the preceding claims, characterized in that at least one coupling head (8a) is in the form of a drill chuck and at least one coupling head (8b) is in the form of a receiving means for a screw bit, wherein a reduction gear (17), more especially in the form of a planetary gear train, is provided between the coupling head (8b) that is in the form of a receiving means for a screw bit and the second coupling part (11) that is associated therewith.
- Hand tool (1) according to the preceding claim, characterized in that the coupling head (8b) that is in the form of a receiving means for a screw bit has a torque limiting means, more especially in the form of a sliding clutch.
- Hand tool (1) according to one of the preceding claims, characterized in that the axis of rotation B of the first coupling part (10) is provided at an angle deviating from the vertical on the plane of rotation of the turret (7).
- Hand tool (1) according to one of the preceding claims, characterized in that the axis of rotation B is aligned offset in a parallel manner relative to the axis of rotation A of the turret (7) and is guided through a recess (12) provided within the pivot bearing arrangement.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07002357A EP1952953B1 (en) | 2007-02-02 | 2007-02-02 | Hand-tool for drilling and/or screwing |
| AT07002357T ATE427811T1 (en) | 2007-02-02 | 2007-02-02 | HAND TOOL FOR DRILLING AND/OR SCREWING |
| DE502007000587T DE502007000587D1 (en) | 2007-02-02 | 2007-02-02 | Hand tool for drilling and / or screwing |
| HK07109496A HK1104161A2 (en) | 2007-02-02 | 2007-08-31 | Hand tools for drilling and/or screwing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07002357A EP1952953B1 (en) | 2007-02-02 | 2007-02-02 | Hand-tool for drilling and/or screwing |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1952953A1 EP1952953A1 (en) | 2008-08-06 |
| EP1952953A8 EP1952953A8 (en) | 2008-10-29 |
| EP1952953B1 true EP1952953B1 (en) | 2009-04-08 |
Family
ID=38191357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07002357A Not-in-force EP1952953B1 (en) | 2007-02-02 | 2007-02-02 | Hand-tool for drilling and/or screwing |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1952953B1 (en) |
| AT (1) | ATE427811T1 (en) |
| DE (1) | DE502007000587D1 (en) |
| HK (1) | HK1104161A2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1357007A (en) * | 1971-04-21 | 1974-06-19 | Gkn Screws Fasteners Ltd | Power tool |
| AU631615B2 (en) * | 1989-03-28 | 1992-12-03 | Whitehot Solutions Pty Ltd | Improved hand-held power tool |
| DE29510475U1 (en) * | 1995-06-28 | 1995-09-14 | Huber Wilhelm | Hand drill |
| DE20122326U1 (en) * | 2000-09-28 | 2005-04-28 | Eriksen, Steen Mandsfelt | Tool turret for a portable drill comprises each chuck spindle position having a locking notch and each spindle a dog clutch mating with a slidable sleeve on the motor spindle which when slid back releases the lock and spindle |
| US7367757B2 (en) * | 2004-12-31 | 2008-05-06 | Sean Peter Phillips | Electric drill with modified bit gripping assembly |
| MX2007012572A (en) | 2005-04-11 | 2007-11-16 | Whitehot Solutions Pty Ltd | Automated chuck exchange using rotating turret. |
-
2007
- 2007-02-02 EP EP07002357A patent/EP1952953B1/en not_active Not-in-force
- 2007-02-02 DE DE502007000587T patent/DE502007000587D1/en active Active
- 2007-02-02 AT AT07002357T patent/ATE427811T1/en active
- 2007-08-31 HK HK07109496A patent/HK1104161A2/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HK1104161A2 (en) | 2008-01-04 |
| EP1952953A8 (en) | 2008-10-29 |
| ATE427811T1 (en) | 2009-04-15 |
| EP1952953A1 (en) | 2008-08-06 |
| DE502007000587D1 (en) | 2009-05-20 |
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