EP1621294B1 - Tool handle - Google Patents

Tool handle Download PDF

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Publication number
EP1621294B1
EP1621294B1 EP05106892.2A EP05106892A EP1621294B1 EP 1621294 B1 EP1621294 B1 EP 1621294B1 EP 05106892 A EP05106892 A EP 05106892A EP 1621294 B1 EP1621294 B1 EP 1621294B1
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EP
European Patent Office
Prior art keywords
main handle
device housing
curved
hand
handle
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Not-in-force
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EP05106892.2A
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German (de)
French (fr)
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EP1621294A3 (en
EP1621294A2 (en
Inventor
Alexander Funk
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Hilti AG
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Hilti AG
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Publication of EP1621294A2 publication Critical patent/EP1621294A2/en
Publication of EP1621294A3 publication Critical patent/EP1621294A3/en
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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
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the invention relates to a motor-operated hand tool, in particular an angle grinder, with a device housing which has a tool head on a tool-side end, on which a particular disk-shaped tool can be fixed. At a remote from the tool end end handle side end of the device housing is connected to a main handle. In this case, the main handle relative to the device housing is rotatable about a movement axis.
  • An angle grinder is known whose main handle is held rotatable relative to the motor housing about its longitudinal axis.
  • the motor housing has a bearing neck, on which a turnstile is rotatably held, which is firmly connected to the main handle.
  • a fixing device is provided which causes a positive locking between the motor housing and the turnstile.
  • a disadvantage of the known procedure is that for some applications of the power tool despite the rotatable mounting of the main handle no ergonomically favorable hand position on the main handle is possible. For example, the hand holding the main handle has to be twisted heavily when working in the floor or overhead area. This can lead to excessive impairments and early fatigue of the serving person.
  • a vacuum cleaner known which comprises a handle member having a handle part, which is guided by means of a connected to a device part, or connected to this holding element in the manner of a rotary or sliding joint on a circular path.
  • a hand-held implement known, in which a drive motor is accommodated in a housing to which at least one handle for handling the implement is attached.
  • the handle is pivotally mounted about an axis of rotation and lockable by means of unlockable locking means in defined rotational angle positions.
  • the bearing for the handle is designed as a journal bearing.
  • the locking means are located in a protected area from contamination and the outer contour of the handle and the housing is not affected, recesses are provided on the lateral surface of the journal, in which engages a gate valve.
  • the locking slide is guided through a radial opening of the bearing sleeve and is held by spring bias in the recess of the journal.
  • the present invention has for its object to avoid the disadvantages mentioned in a hand tool and to allow for a large variety of applications ergonomic hand position on the main handle.
  • the object of the main handle is additionally solved by the hand tool according to claim 1, wherein adjustability about the movement axis has a relation to this adjustable inclination.
  • the main handle has in this case an arc element which is displaceably held on a bearing element for adjusting the inclination of the main handle relative to the movement axis and permanently connected via the bearing element to the device housing, wherein the bearing element provided on a remote from the tool-side end of the device housing handle-side end and it is rotatably held on the housing in a rotational direction about the axis of movement around.
  • the arcuate path of movement in each rotational position of the main handle around the axis of motion spans a plane parallel to the axis of motion.
  • the main handle on the one hand about the axis of movement and on the other hand to a perpendicular or virtual fixed axis of rotation adjustable, whereby for almost every conceivable type of application ergonomically favorable hand position on the main handle can be achieved.
  • the bearing element is part of a connection arrangement and the arcuate path of movement is defined by the connection arrangement between the device housing and the main handle.
  • the connection arrangement has on the bearing element a sliding bearing on which the arch element is held displaceably.
  • the sheet member can be fixed by a fixing device on the plain bearing. In this way, you can achieve a very stable leadership and determination of the arch element.
  • the main handle is D-shaped and formed the bow member by an arcuate portion of the main handle.
  • a releasable positive connection can be produced, which acts in the direction of the arcuate path of movement. This makes it possible to set the main handle safely and with little play in different positions relative to the device housing.
  • the positive connection can be produced by a biased against the sheet member engaging element of the fixing, which can be laid in one of several recessed on the sheet member engagement recesses. As a result, the positive connection can be produced and removed in a simple manner.
  • the main handle which is rotatable relative to the device housing, can be fixed in a form-fitting manner to the device housing by means of an anti-twist device.
  • the main handle can be fixed in a particularly large number of rotational positions around the movement axis in a stable manner relative to the device housing.
  • a biased against the device housing fuse element is arranged on the bearing element, which can be laid in one of several recessed on the device housing securing recesses.
  • Such a bearing element offers many possibilities for a stable and variable fixing of the main handle relative to the device housing.
  • the same means can be used for fixing the bearing element on the device housing as for fixing the arch element on the bearing element. In this way, the manufacturing cost of the power tool can be further reduced.
  • Fig. 1 shows a hand tool 2 in the form of an angle grinder, with a device housing 4.
  • the device housing 4 forms at a tool-side end of a device head 6, on which a tool holder 8 is provided for receiving a tool 10 in the form of a tool disk.
  • a bearing element 12 is provided, which is held in a rotational direction D about a movement axis B around rotatable on the device housing 4.
  • the movement axis B coincides with the main longitudinal axis of the substantially cylindrical device housing 4.
  • a D-shaped main handle 14 is permanently connected to the device housing 4. This can thus be rotated together with the bearing element 12 about the axis of movement B around in a different rotational position relative to the device housing 4, as shown by the dashed line.
  • the main handle 14 is composed essentially of a straight handle member 16 and an arch member 18 which are integrally formed.
  • the curved element 18 is held displaceably along its longitudinal extension on the bearing element 12, so that the main handle 14 is forcibly guided during displacement along an arcuate path P.
  • the movement path P is aligned such that it spans a plane E, which is always parallel to the movement axis B regardless of the rotational position of the bearing element 12 relative to the device housing 4.
  • the main handle 14 is rotated when moving because of the circular arc-shaped formation of its arc member 18 about a fixed axis of rotation A and thus changes its inclination relative to the device housing 4, as shown in dashed lines.
  • the sheet member 18 may also have a different shape from a continuous arc. In this case, the main handle rotates when shifting by a virtual, i. rotational axis A displaced during the displacement
  • the main handle 14 is held on the sheet member 18 in a guide channel acting as a sliding bearing 22.
  • the guide channel 22 thus forms, together with the arch element 18, a connection arrangement which defines the path of movement P of the main handle 14 relative to the bearing element 12.
  • a fixing device designated generally by 24 is also arranged.
  • the fixing device 24 has an engagement element 26 in the form of a sliding block, which is biased by a spring 28 against the sheet member 18, which is supported on the bearing element 12.
  • the engagement element 26 is engaged in one of a plurality of engagement recesses 30, which are embedded in the arch element 18. In this way, a positive connection between the main handle 14 and the bearing element 12 is achieved in the direction of the movement path P.
  • the engagement element 26 is connected to an externally accessible actuating element 32, via which the engagement element 26 can be moved out of the engagement recess 30 against the force of the spring 28. Subsequently, the sheet member 18 along the movement path P in the guide channel 22 are moved. Here, the main handle 14 is rotated about the axis of rotation A around in a new tilt position relative to the device housing 4, as in Fig. 1 shown in dashed lines. Once a desired inclination of the handle member 16 relative to the device housing 4, which is ergonomically particularly favorable for a given application of the power tool, is reached, the actuator 32 is released again.
  • the engagement element 26 can engage in a new engagement recess 30 positioned on the fixing device 24 in this position, in order to again fix the main handle 14 to the bearing element 12 in a form-fitting manner.
  • a bearing neck 34 is formed with a collar 36.
  • This collar 36 is engaged behind by a circumferentially inwardly projecting edge 38 of the bearing element 12, to allow the rotatable in the direction of rotation D mounting of the bearing element 12 on the device housing 4.
  • an anti-twist device 40 is provided, which substantially corresponds to the fixing device 24, as shown Fig. 3 can be seen.
  • the anti-rotation device 40 has a securing element 42 in the form of a sliding block, which is biased by a spring 44 against the device housing 4 and thereby engages in one of a plurality of circularly arranged securing recesses 46, which are embedded in the device housing 4. As a result, a positive connection between the bearing element 12 and the device housing 4 is generated in the direction of rotation D.
  • a recess 48 is recessed in the surface of the bearing element 12, in which a locking element 42 connected to the unlocking element 50 is displaceable from the outside.
  • the securing element 42 can be moved out of the securing recess 46 against the force of the spring 44.
  • the bearing element 12 can be rotated together with the main handle 14 about the axis of movement B around in a new rotational position relative to the device housing 4 and brought into engagement with another of the securing recesses 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Portable Power Tools In General (AREA)

Description

Die Erfindung betrifft ein motorisch betriebenes Handwerkzeuggerät, insbesondere ein Winkelschleifgerät, mit einem Gerätegehäuse, das an einem werkzeugseitigen Ende einen Gerätekopf aufweist, an dem ein insbesondere scheibenförmiges Werkzeug festlegbar ist. An einem von dem werkzeugseitigen Ende abgewandten griffseitigen Ende ist das Gerätegehäuse mit einem Haupthandgriff verbunden. Dabei ist der Haupthandgriff gegenüber dem Gerätegehäuse um eine Bewegungsachse herum verdrehbar.The invention relates to a motor-operated hand tool, in particular an angle grinder, with a device housing which has a tool head on a tool-side end, on which a particular disk-shaped tool can be fixed. At a remote from the tool end end handle side end of the device housing is connected to a main handle. In this case, the main handle relative to the device housing is rotatable about a movement axis.

Derartige Handwerkzeuggeräte können durch den verstellbaren Haupthandgriff auf verschiedene Anwendungsarten eingestellt werden, indem der Haupthandgriff gegenüber dem Gerätegehäuse verdreht oder verschwenkt wird. Unter dem Begriff Haupthandgriff ist dabei ein Handgriff zu verstehen, der, beispielsweise im Gegensatz zu einem bedarfsweise einseztbaren zusätzlichen Seitenhandgriff, für eine dauerhafte Verwendung an dem Handwerkzeuggerät vorgesehen ist und bei jeder vorgesehenen Anwendungsart des Handwerkzeuggerätes von einer Hand des Bedieners ergriffen wird.Such hand tool devices can be adjusted by the adjustable main handle on different types of applications by the main handle relative to the device housing is rotated or pivoted. The term main handle here is a handle to understand that, for example, in contrast to a einseztbaren additional side handle as needed, is provided for a permanent use of the power tool and is taken at each intended application of the power tool by a hand of the operator.

Aus der DE 41 02 483 ist eine Winkelschleifmaschine bekannt, deren Haupthandgriff relativ zum Motorgehäuse um dessen Längsachse rotierbar gehalten ist. Hierzu weist das Motorgehäuse einen Lagerstutzen auf, an dem ein Drehkreuz verdrehbar gehalten ist, das fest mit dem Haupthandgriff verbunden ist. Ferner ist eine Fixiervorrichtung vorgesehen, die eine formschlüssige Verriegelung zwischen dem Motorgehäuse und dem Drehkreuz bewirkt.From the DE 41 02 483 An angle grinder is known whose main handle is held rotatable relative to the motor housing about its longitudinal axis. For this purpose, the motor housing has a bearing neck, on which a turnstile is rotatably held, which is firmly connected to the main handle. Further, a fixing device is provided which causes a positive locking between the motor housing and the turnstile.

Nachteilig an der bekannten Vorgehensweise ist, dass für einige Anwendungsarten des Handwerkzeuggerätes trotz der rotierbaren Lagerung des Haupthandgriffes keine ergonomisch günstige Handhaltung am Haupthandgriff möglich ist. So muss die den Haupthandgriff haltende Hand beispielsweise bei Arbeiten, die im Boden- oder Überkopfbereich ausgeführt werden, stark verdreht werden. Dies kann zustarken Beeinträchtigungen und frühzeitigem Ermüden der bedienenden Person führen.A disadvantage of the known procedure is that for some applications of the power tool despite the rotatable mounting of the main handle no ergonomically favorable hand position on the main handle is possible. For example, the hand holding the main handle has to be twisted heavily when working in the floor or overhead area. This can lead to excessive impairments and early fatigue of the serving person.

Aus der DE 202 05 382 U ist ein Gerät, wie z. B. ein Staubsauger, bekannt, das ein Griffelement mit einem Griffteil aufweist, das mittels eines mit einem Geräteteil, verbundenen oder mit diesem verbindbaren Halteelementes nach Art eines Dreh- oder Schiebegelenks auf einer Kreisbahn geführt ist.From the DE 202 05 382 U is a device, such. As a vacuum cleaner, known which comprises a handle member having a handle part, which is guided by means of a connected to a device part, or connected to this holding element in the manner of a rotary or sliding joint on a circular path.

Aus der DE 195 32 299 A1 ist ein handgeführtes Arbeitsgerät bekannt, bei dem ein Antriebsmotor in einem Gehäuse aufgenommen ist, an dem mindestens ein Handgriff zur Handhabung des Arbeitsgerätes befestigt ist. Der Handgriff ist um eine Drehachse schwenkbar gelagert und mittels entriegelbaren Rastmitteln selbständig in definierten Drehwinkellagen arretierbar. Das Lager für den Handgriff ist als Zapfenlager ausgebildet. Damit die Rastmittel sich in einem vor Verschmutzung geschützten Bereich befinden und die äußere Kontur des Handgriffes und des Gehäuses nicht beeinträchtigt ist, sind Ausnehmungen an der Mantelfläche des Lagerzapfens vorgesehen, in die ein Sperrschieber eingreift. Der Sperrschieber ist durch eine radiale Öffnung der Lagerhülse geführt und wird durch Federvorspannung in der Ausnehmung des Lagerzapfens gehalten.From the DE 195 32 299 A1 is a hand-held implement known, in which a drive motor is accommodated in a housing to which at least one handle for handling the implement is attached. The handle is pivotally mounted about an axis of rotation and lockable by means of unlockable locking means in defined rotational angle positions. The bearing for the handle is designed as a journal bearing. Thus, the locking means are located in a protected area from contamination and the outer contour of the handle and the housing is not affected, recesses are provided on the lateral surface of the journal, in which engages a gate valve. The locking slide is guided through a radial opening of the bearing sleeve and is held by spring bias in the recess of the journal.

Aus der DE 93 19 263 U ist eine handbetätigte Winkelschleifmaschine mit einem Antriebsmotor und einem von diesem angetriebenen, auswechselbaren Schleifwerkzeug bekannt, die ein Gehäuse aufweist, welches von der Bedienungsperson mit dessen einer Hand in dem Arbeitsbereich des Schleifwerkzeuges orientierbar ist und das einen diese Orientierung unterstützenden, von der anderen Hand der Bedienungsperson betätigbaren Führungsgriff aufweist. Der Führungsgriff ist dabei schwenkbar an dem Gehäuse befestigt.From the DE 93 19 263 U is a hand-operated angle grinder with a drive motor and driven by this, interchangeable grinding tool known, which has a housing which is orientable by the operator with one hand in the working area of the grinding tool and the one supporting this orientation, from the other hand of the operator having operable guide handle. The guide handle is pivotally mounted on the housing.

Aus der DE 198 54 468 A1 ist eine Handwerkzeugmaschine bekannt, die ein langgestrecktes Gehäuse und einen in dem Gehäuse angeordneten Antriebsmotor, mit welchem über ein Winkelgetriebe eine Werkzeugaufnahme antreibbar ist, aufweist. Die Handwerkzeugmaschine weist ferner eine erste an einem nahe der Werkzeugaufnahme liegenden Gehäuseabschnitt angeordnete und quer zu einer Längsachse des Gehäuses ausgerichtete Handgriffeinheit und eine zweite am Gehäuse angeordnete Handgriffeinheit auf. Die erste Handgriffeinheit ist in einer Verstellführung am Gehäuse geführt gehalten und in dieser Verstellführung innerhalb eines Winkelbereichs von mindestens 90° um eine Längsachse des Gehäuses zwischen mehreren möglichen Stellungen verstellbar und in der jeweiligen Stellung formschlüssig fixierbar.From the DE 198 54 468 A1 a hand tool machine is known, which has an elongated housing and a drive motor arranged in the housing, with which a tool holder is drivable via an angle gear. The hand tool further comprises a first arranged on a near the tool holder housing portion and aligned transversely to a longitudinal axis of the housing handle assembly and a second arranged on the housing handle assembly. The first handle unit is kept guided in an adjustment on the housing and adjustable in this adjustment within an angular range of at least 90 ° about a longitudinal axis of the housing between a plurality of possible positions and positively fixed in the respective position.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, bei einem Handwerkzeuggerät die genannten Nachteile zu vermeiden und bei einer grossen Vielzahl von Anwendungsarten eine ergonomisch günstige Handhaltung am Haupthandgriff zu ermöglichen.The present invention has for its object to avoid the disadvantages mentioned in a hand tool and to allow for a large variety of applications ergonomic hand position on the main handle.

Erfindungsgemäss wird die Aufgabe der Haupthandgriff zusätzlich zur durch das Handwerkzeuggerät gemäß Anspruch 1 gelöst, wobei Verstellbarkeit um die Bewegungsachse eine gegenüber dieser verstellbare Neigung aufweist. Der Haupthandgriff weist dabei ein Bogenelement auf, welches zur Verstellung der Neigung des Haupthandgriffs gegenüber der Bewegungsachse an einem Lagerelement verschiebbar gehalten und über das Lagerelement dauerhaft mit dem Gerätegehäuse verbunden ist, wobei das Lagerelement an einem von dem werkzeugseitigen Ende des Gerätegehäuses abgewandten griffseitigen Ende vorgesehen und dabei in einer Drehrichtung um die Bewegungsachse herum rotierbar am Gehäuse gehalten ist. Hierdurch kann zusätzlich zu der veränderbaren Drehposition auch die Neigung des Haupthandgriffes gegenüber dem Gerätegehäuse verändert werden. Auf diese Weise erhält man besonders vielseitige Möglichkeiten zur Anordnung des Haupthandgriffes gegenüber dem Gerätegehäuse. Somit kann für besonders viele Anwendungsarten des Handwerkzeuggerätes eine ergonomisch günstige Handhaltung am Haupthandgriff eingestellt werden.According to the invention, the object of the main handle is additionally solved by the hand tool according to claim 1, wherein adjustability about the movement axis has a relation to this adjustable inclination. The main handle has in this case an arc element which is displaceably held on a bearing element for adjusting the inclination of the main handle relative to the movement axis and permanently connected via the bearing element to the device housing, wherein the bearing element provided on a remote from the tool-side end of the device housing handle-side end and it is rotatably held on the housing in a rotational direction about the axis of movement around. In this way, in addition to the variable rotational position and the inclination of the main handle relative to the device housing can be changed. In this way, one obtains particularly versatile possibilities for the arrangement of the main handle relative to the device housing. Thus, an ergonomically favorable hand position can be set on the main handle for many applications of the power tool.

Erfindungsgemäss ist die Neigung durch Verschieben des Haupthandgriffs entlang eines bogenförmigen Bewegungspfades verstellbar. Hierdurch wird der Haupthandgriffs beim Verlegen entlang des Bewegungspfades gegenüber dem Gerätegehäuse verdreht. Bei dieser Vorgehensweise kann der Haupthandgriff besonders stabil gelagert werden. Zudem können hierbei besonders viele verschiedene Neigungspositionen zwischen dem Haupthandgriff und dem Gerätegehäuse eingestellt werden.According to the invention the inclination is adjustable by moving the main handle along an arcuate path of movement. As a result, the main handle is twisted when laying along the path relative to the device housing. In this procedure, the main handle can be stored very stable. In addition, this can be set in particular many different inclination positions between the main handle and the device housing.

Bevorzugterweise spannt der bogenförmige Bewegungspfad in jeder Drehstellung des Haupthandgriffes um die Bewegungsachse herum eine Ebene auf, die parallel zur Bewegungsachse liegt. Auf diese Weise ist der Haupthandgriff einerseits um die Bewegungsachse und andererseits um eine dazu senkrecht stehende feste oder virtuelle Drehachse verstellbar, wodurch für nahezu jede denkbare Anwendungsart eine ergonomisch günstige Handhaltung am Haupthandgriff erzielt werden kann.Preferably, the arcuate path of movement in each rotational position of the main handle around the axis of motion spans a plane parallel to the axis of motion. In this way, the main handle on the one hand about the axis of movement and on the other hand to a perpendicular or virtual fixed axis of rotation adjustable, whereby for almost every conceivable type of application ergonomically favorable hand position on the main handle can be achieved.

Erfindungsgemäss ist das Lagerelement Teil einer Verbindungsanordnung und ist der bogenförmige Bewegungspfad durch die Verbindungsanordnung zwischen dem Gerätegehäuse und dem Haupthandgriff definiert. Die Verbindungsanordnung weist hierzu am Lagerelement ein Gleitlager auf, an dem das Bogenelement verschiebbar gehalten ist. Dabei kann das Bogenelement durch eine Fixiereinrichtung am Gleitlager festgelegt werden. Auf diese Weise kann man eine sehr stabile Führung und Festlegung des Bogenelementes erzielen.According to the invention, the bearing element is part of a connection arrangement and the arcuate path of movement is defined by the connection arrangement between the device housing and the main handle. For this purpose, the connection arrangement has on the bearing element a sliding bearing on which the arch element is held displaceably. In this case, the sheet member can be fixed by a fixing device on the plain bearing. In this way, you can achieve a very stable leadership and determination of the arch element.

Bevorzugterweise ist der Haupthandgriff D-förmig ausgebildet und das Bogenelement durch einen bogenförmigen Abschnitt des Haupthandgriffes gebildet. Durch diese einteilige Ausbildung des Haupthandgriffes und des Bogenelementes ist bei geringen Herstellungskosten eine besonders stabile Festlegung des Haupthandgriffes an dem Gerätegehäuse herstellbar.Preferably, the main handle is D-shaped and formed the bow member by an arcuate portion of the main handle. By this one-piece design of the main handle and the curved element a particularly stable fixing of the main handle on the device housing can be produced at low production costs.

Vorteilhafterweise ist zwischen dem Bogenelement und der Fixiereinrichtung ein lösbarer Formschluss herstellbar, der in Richtung des bogenförmigen Bewegungspfades wirkt. Hierdurch ist es möglich den Haupthandgriff sicher und bei geringem Bewegungsspiel in verschiedenen Positionen gegenüber dem Gerätegehäuse festzulegen.Advantageously, between the sheet member and the fixing a releasable positive connection can be produced, which acts in the direction of the arcuate path of movement. This makes it possible to set the main handle safely and with little play in different positions relative to the device housing.

Dabei ist es besonders günstig, wenn der Formschluss durch ein gegen das Bogenelement vorgespanntes Eingriffelement der Fixiereinrichtung herstellbar ist, das in eine von mehreren am Bogenelement eingelassenen Eingriffausnehmungen verlegbar ist. Hierdurch kann der Formschluss in einfacher Weise hergestellt und aufgehoben werden.It is particularly advantageous if the positive connection can be produced by a biased against the sheet member engaging element of the fixing, which can be laid in one of several recessed on the sheet member engagement recesses. As a result, the positive connection can be produced and removed in a simple manner.

In einer besonders vorteilhaften Ausführungsform ist der gegenüber dem Gerätegehäuse rotierbar gehalten Haupthandgriff mittels einer Verdrehsicherung formschlüssig an dem Gerätegehäuse festlegbar. Hierdurch kann der Haupthandgriff in besonders vielen Drehpositionen um die Bewegungsachse herum auf stabile Weise gegenüber dem Gerätegehäuse festgelegt werden.In a particularly advantageous embodiment, the main handle, which is rotatable relative to the device housing, can be fixed in a form-fitting manner to the device housing by means of an anti-twist device. As a result, the main handle can be fixed in a particularly large number of rotational positions around the movement axis in a stable manner relative to the device housing.

Dabei ist es günstig, wenn an dem Lagerelement ein gegen das Gerätegehäuse vorgespanntes Sicherungselement angeordnet ist, das in eine von mehreren am Gerätegehäuse eingelassenen Sicherungsausnehmungen verlegbar ist. Ein solches Lagerelement bietet besonders viele Möglichkeiten für eine stabile und variable Festlegung des Haupthandgriffes gegenüber dem Gerätegehäuse. Ferner können hierbei zur Festlegung des Lagerelementes am Gerätegehäuse die gleichen Mittel verwendet werden wie zur Festlegung des Bogenelementes am Lagerelement. Auf diese Weise können die Herstellungskosten des Handwerkzeuggerätes weiter reduziert werden.It is advantageous if a biased against the device housing fuse element is arranged on the bearing element, which can be laid in one of several recessed on the device housing securing recesses. Such a bearing element offers many possibilities for a stable and variable fixing of the main handle relative to the device housing. Furthermore, the same means can be used for fixing the bearing element on the device housing as for fixing the arch element on the bearing element. In this way, the manufacturing cost of the power tool can be further reduced.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
eine Ansicht eines erfindungsgemässen Handwerkzeuggerätes,
Fig. 2
eine teilweise geschnittene Ansicht eines Haupthandgriffes des Handwerkzeuggerätes nach Fig. 1 und
Fig. 3
eine teilweise geschnittene Ansicht des Haupthandgriffes nach Fig. 2 in einer um 90° verdrehten Position.
The invention will be explained in more detail below with reference to an embodiment. Show it:
Fig. 1
a view of a hand tool according to the invention,
Fig. 2
a partially sectioned view of a main handle of the power tool after Fig. 1 and
Fig. 3
a partially cutaway view of the main handle behind Fig. 2 in a rotated position by 90 °.

Fig. 1 zeigt ein Handwerkzeuggerät 2 in Form eines Winkelschleifgerätes, mit einem Gerätegehäuse 4. Das Gerätegehäuse 4 bildet an einem werkzeugseitigen Ende einen Gerätekopf 6 aus, an dem eine Werkzeugaufnahme 8 zur Aufnahme eines Werkzeuges 10 in Form einer Werkzeugscheibe vorgesehen ist. Fig. 1 shows a hand tool 2 in the form of an angle grinder, with a device housing 4. The device housing 4 forms at a tool-side end of a device head 6, on which a tool holder 8 is provided for receiving a tool 10 in the form of a tool disk.

An einem von dem werkzeugseitigen Ende des Gerätegehäuses 4 abgewandten griffseitigen Ende ist ein Lagerelement 12 vorgesehen, das in einer Drehrichtung D um eine Bewegungsachse B herum rotierbar am Gerätegehäuse 4 gehalten ist. Die Bewegungsachse B fällt dabei mit der Hauptlängsachse des im Wesentlichen zylinderförmigen Gerätegehäuses 4 zusammen.At one of the tool-side end of the device housing 4 facing away from the handle end, a bearing element 12 is provided, which is held in a rotational direction D about a movement axis B around rotatable on the device housing 4. The movement axis B coincides with the main longitudinal axis of the substantially cylindrical device housing 4.

Über das Lagerelement 12 ist ein D-förmiger Haupthandgriff 14 dauerhaft mit dem Gerätegehäuse 4 verbunden. Dieser kann somit zusammen mit dem Lagerelement 12 um die Bewegungsachse B herum in eine andere Drehposition gegenüber dem Gerätegehäuse 4 verdreht werden, wie durch die strichpunktierte Linie dargestellt.Via the bearing element 12, a D-shaped main handle 14 is permanently connected to the device housing 4. This can thus be rotated together with the bearing element 12 about the axis of movement B around in a different rotational position relative to the device housing 4, as shown by the dashed line.

Der Haupthandgriff 14 setzt sich im Wesentlichen aus einem geraden Griffelement 16 und einem Bogenelement 18 zusammen, die einteilig ausgeformt sind. Das Bogenelement 18 ist entlang seiner Längserstreckung verschiebbar am Lagerelement 12 gehalten, so dass der Haupthandgriff 14 beim Verschieben entlang eines bogenförmigen Bewegungspfades P zwangsgeführt ist. Der Bewegungspfad P ist dabei derart ausgerichtet, dass er eine Ebene E aufspannt, die unabhängig von der Drehstellung des Lagerelementes 12 gegenüber dem Gerätegehäuse 4 immer parallel zu der Bewegungsachse B steht.The main handle 14 is composed essentially of a straight handle member 16 and an arch member 18 which are integrally formed. The curved element 18 is held displaceably along its longitudinal extension on the bearing element 12, so that the main handle 14 is forcibly guided during displacement along an arcuate path P. The movement path P is aligned such that it spans a plane E, which is always parallel to the movement axis B regardless of the rotational position of the bearing element 12 relative to the device housing 4.

Der Haupthandgriff 14 wird beim Verschieben wegen der kreisbogenförmigen Ausbildung seines Bogenelementes 18 um eine feste Drehachse A verdreht und ändert somit seine Neigung gegenüber dem Gerätegehäuse 4, wie gestrichelt dargestellt. Alternativ hierzu kann das Bogenelement 18 auch eine von einem durchgehenden Kreisbogen abweichende Form aufweisen. In diesem Fall dreht sich der Haupthandgriff beim Verschieben um eine virtuelle, d.h. sich bei der Verschiebung verlagernde Drehachse A.The main handle 14 is rotated when moving because of the circular arc-shaped formation of its arc member 18 about a fixed axis of rotation A and thus changes its inclination relative to the device housing 4, as shown in dashed lines. Alternatively, the sheet member 18 may also have a different shape from a continuous arc. In this case, the main handle rotates when shifting by a virtual, i. rotational axis A displaced during the displacement

Wie aus Fig. 2 zu entnehmen ist, ist der Haupthandgriff 14 über das Bogenelement 18 in einem als Gleitlager wirkenden Führungskanal 22 gehalten. Der Führungskanal 22 bildet somit zusammen mit dem Bogenelement 18 eine Verbindungsanordnung, die den Bewegungspfad P des Haupthandgriffes 14 gegenüber dem Lagerelement 12 definiert.How out Fig. 2 it can be seen, the main handle 14 is held on the sheet member 18 in a guide channel acting as a sliding bearing 22. The guide channel 22 thus forms, together with the arch element 18, a connection arrangement which defines the path of movement P of the main handle 14 relative to the bearing element 12.

An der Verbindungsanordnung ist ferner eine insgesamt mit 24 bezeichnete Fixiereinrichtung angeordnet. Die Fixiereinrichtung 24 weist ein Eingriffelement 26 in Form eines Nutsteines auf, der mittels einer Feder 28 gegen das Bogenelement 18 vorgespannt ist, die sich am Lagerelement 12 abstützt. Hierdurch ist das Eingriffelement 26 in eine von mehreren Eingriffausnehmungen 30 eingerückt, die am Bogenelement 18 eingelassen sind. Auf diese Weise wird in Richtung des Bewegungspfades P ein Formschluss zwischen dem Haupthandgriff 14 und dem Lagerelement 12 erzielt.At the connection arrangement, a fixing device designated generally by 24 is also arranged. The fixing device 24 has an engagement element 26 in the form of a sliding block, which is biased by a spring 28 against the sheet member 18, which is supported on the bearing element 12. As a result, the engagement element 26 is engaged in one of a plurality of engagement recesses 30, which are embedded in the arch element 18. In this way, a positive connection between the main handle 14 and the bearing element 12 is achieved in the direction of the movement path P.

Zum Lösen des Formschlusses ist das Eingriffelement 26 mit einem von Aussen zugänglichen Betätigungselement 32 verbunden, über das das Eingriffelement 26 entgegen der Kraft der Feder 28 aus der Eingriffausnehmung 30 herausbewegt werden kann. Anschliessend kann das Bogenelement 18 entlang des Bewegungspfades P im Führungskanal 22 verschoben werden. Dabei wird der Haupthandgriff 14 um die Drehachse A herum in eine neue Neigungsposition gegenüber dem Gerätegehäuse 4 verdreht, wie in Fig. 1 gestrichelt dargestellt. Sobald eine gewünschte Neigung des Griffelementes 16 gegenüber dem Gerätegehäuse 4, die für eine vorgesehene Anwendung des Handwerkzeuggerätes ergonomisch besonders günstig ist, erreicht ist, wird das Betätigungselement 32 wieder losgelassen. Dadurch kann das Eingriffelement 26 infolge der Kraft der Feder 28 in eine neue, in dieser Stellung an der Fixiereinrichtung 24 positionierte Eingriffausnehmung 30 einrücken, um den Haupthandgriff 14 wieder formschlüssig am Lagerelement 12 festzulegen.To release the positive connection, the engagement element 26 is connected to an externally accessible actuating element 32, via which the engagement element 26 can be moved out of the engagement recess 30 against the force of the spring 28. Subsequently, the sheet member 18 along the movement path P in the guide channel 22 are moved. Here, the main handle 14 is rotated about the axis of rotation A around in a new tilt position relative to the device housing 4, as in Fig. 1 shown in dashed lines. Once a desired inclination of the handle member 16 relative to the device housing 4, which is ergonomically particularly favorable for a given application of the power tool, is reached, the actuator 32 is released again. As a result, as a result of the force of the spring 28, the engagement element 26 can engage in a new engagement recess 30 positioned on the fixing device 24 in this position, in order to again fix the main handle 14 to the bearing element 12 in a form-fitting manner.

Wie aus Fig. 2 ferner zu entnehmen ist, ist am Gerätegehäuse 4 ein Lagerstutzen 34 mit einem Kragen 36 ausgeformt. Dieser Kragen 36 wird von einem umlaufend nach innen ragenden Rand 38 des Lagerelementes 12 hintergriffen, um die in Drehrichtung D verdrehbare Lagerung des Lagerelementes 12 am Gerätegehäuse 4 zu ermöglichen.How out Fig. 2 can also be seen, on the device housing 4, a bearing neck 34 is formed with a collar 36. This collar 36 is engaged behind by a circumferentially inwardly projecting edge 38 of the bearing element 12, to allow the rotatable in the direction of rotation D mounting of the bearing element 12 on the device housing 4.

Zur verdrehsicheren Festlegung des Lagerelementes 12 am Gerätegehäuse 4 ist eine Verdrehsicherung 40 vorgesehen, die im Wesentlichen der Fixiereinrichtung 24 entspricht, wie aus Fig. 3 zu entnehmen ist. Die Verdrehsicherung 40 weist ein Sicherungselement 42 in Form eines Nutensteines auf, das durch eine Feder 44 gegen das Gerätegehäuse 4 vorgespannt ist und dabei in eine von mehreren kreisförmig angeordneten Sicherungsausnehmungen 46 greift, die in das Gerätegehäuse 4 eingelassen sind. Hierdurch wird in Drehrichtung D ein Formschluss zwischen dem Lagerelement 12 und dem Gerätegehäuse 4 erzeugt.For torsion-proof fixing of the bearing element 12 on the device housing 4, an anti-twist device 40 is provided, which substantially corresponds to the fixing device 24, as shown Fig. 3 can be seen. The anti-rotation device 40 has a securing element 42 in the form of a sliding block, which is biased by a spring 44 against the device housing 4 and thereby engages in one of a plurality of circularly arranged securing recesses 46, which are embedded in the device housing 4. As a result, a positive connection between the bearing element 12 and the device housing 4 is generated in the direction of rotation D.

Zum Lösen des Formschlusses ist in die Oberfläche des Lagerelementes 12 eine Vertiefung 48 eingelassen, in der ein mit dem Sicherungselement 42 verbundenes Entriegelungselement 50 von Aussen verschiebbar ist. Durch Betätigung dieses Entriegelungselementes 50 kann das Sicherungselement 42 entgegen der Kraft der Feder 44 aus der Sicherungsausnehmung 46 herausbewegt werden. Anschliessend kann das Lagerelement 12 zusammen mit dem Haupthandgriff 14 um die Bewegungsachse B herum in eine neue Drehposition gegenüber dem Gerätegehäuse 4 verdreht und mit einer anderen der Sicherungsausnehmungen 46 in Eingriff gebracht werden.To release the positive connection, a recess 48 is recessed in the surface of the bearing element 12, in which a locking element 42 connected to the unlocking element 50 is displaceable from the outside. By actuating this unlocking element 50 the securing element 42 can be moved out of the securing recess 46 against the force of the spring 44. Subsequently, the bearing element 12 can be rotated together with the main handle 14 about the axis of movement B around in a new rotational position relative to the device housing 4 and brought into engagement with another of the securing recesses 46.

Wie aus den Fig. 2 und 3 ferner zu entnehmen ist, sind am Bogenelement 18 zwei bogenförmige Führungsnuten 52 eingelassen, die mit entsprechend geformten Führungsrippen 54 des Führungskanals 22 zusammenwirken, um eine stabile Führung und Festlegung des Haupthandgriffes 14 gegenüber dem Lagerelement 12 zu gewährleisten.Like from the Fig. 2 and 3 it can also be seen, two arcuate guide grooves 52 are embedded in the sheet member 18, which cooperate with correspondingly shaped guide ribs 54 of the guide channel 22 to ensure a stable guidance and fixing the main handle 14 against the bearing element 12.

Claims (7)

  1. Hand-held power tool device (2), in particular an angle grinding device comprising a device housing (4) which has a device head (6) at a tool-side end to which a tool (10) can be fastened, and which is connected at a handle-side end remote from the tool-side end to a main handle (14), wherein the main handle (14) is displaceable relative to the device housing (4) about a movement axis (B), characterised in that the main handle (14) comprises a curved element (18) which is held displaceable at a bearing element (12) along a curved movement path in order to adjust the tilt of the main handle (14) relative to the movement axis (B) and is permanently connected via the bearing element (12) to the device housing (4), wherein the bearing element (12) is provided at a handle-side end remote from the tool-side end of the device housing (4) and is held at the housing (4) rotatable in a rotation direction (D) about the movement axis (B), wherein the bearing element (12) is part of a connecting arrangement and the curved movement path (P) is defined by the connecting arrangement between the device housing (4) and the main handle (14), said connecting arrangement comprising a sliding bearing at the bearing element (12), at which sliding bearing the curved element (18) is displaceably held, wherein the curved element (18) is fixable at the sliding bearing by means of a fixing device (24).
  2. Hand-held power tool device according to claim 1, characterised in that the movement path (P) describes a plane (E) which lies parallel to the movement axis (B).
  3. Hand-held power tool device according to one of the claims 1 or 2, characterised in that the main handle (14) is configured D-shaped and the curved element (18) consists of a curved section of the main handle (14).
  4. Hand-held power tool according to one of the claims 1 to 3, characterised in that a releasable form-fit can be created between the curved element (18) and the fixing device (24), said form-fit acting in the direction of the curved movement path (P).
  5. Hand-held power tool according to claim 4, characterised in that the form-fit can be created by an engagement element (26) of the fixing device (24), said engagement element being pre-tensioned against the curved element (18), and being placeable in one of a plurality of engagement recesses (30) set into the curved element (18).
  6. Hand-held power tool according to one of the claims 1 to 5, characterised in that the main handle (14) which is held rotatable relative to the device housing (4) is fixable in form-fitting manner by means of a twist-fixing (40) at the device housing (4).
  7. Hand-held power tool according to claim 6, characterised in that a securing element (42) pre-tensioned against the device housing (4) is arranged at the bearing element (12), said securing element being placeable in one of a plurality of securing recesses (46) set into the device housing (4).
EP05106892.2A 2004-07-27 2005-07-27 Tool handle Not-in-force EP1621294B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004036420A DE102004036420A1 (en) 2004-07-27 2004-07-27 Power tools handle

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EP1621294A2 EP1621294A2 (en) 2006-02-01
EP1621294A3 EP1621294A3 (en) 2007-09-26
EP1621294B1 true EP1621294B1 (en) 2013-04-24

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EP05106892.2A Not-in-force EP1621294B1 (en) 2004-07-27 2005-07-27 Tool handle

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US (1) US20060025060A1 (en)
EP (1) EP1621294B1 (en)
JP (1) JP4908795B2 (en)
DE (1) DE102004036420A1 (en)

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Also Published As

Publication number Publication date
DE102004036420A1 (en) 2006-03-23
US20060025060A1 (en) 2006-02-02
EP1621294A3 (en) 2007-09-26
EP1621294A2 (en) 2006-02-01
JP4908795B2 (en) 2012-04-04
JP2006035419A (en) 2006-02-09

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