EP2086726B1 - Hand-held machine tool with a vibration-damped handle provided with a switch - Google Patents

Hand-held machine tool with a vibration-damped handle provided with a switch Download PDF

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Publication number
EP2086726B1
EP2086726B1 EP07820070A EP07820070A EP2086726B1 EP 2086726 B1 EP2086726 B1 EP 2086726B1 EP 07820070 A EP07820070 A EP 07820070A EP 07820070 A EP07820070 A EP 07820070A EP 2086726 B1 EP2086726 B1 EP 2086726B1
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EP
European Patent Office
Prior art keywords
switch
power tool
housing
bow
portable power
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.)
Not-in-force
Application number
EP07820070A
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German (de)
French (fr)
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EP2086726A1 (en
Inventor
Gerhard Meixner
Uwe Engelfried
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP2086726A1 publication Critical patent/EP2086726A1/en
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Publication of EP2086726B1 publication Critical patent/EP2086726B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • 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
    • B25F5/006—Vibration damping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs

Definitions

  • the present invention relates to a hand tool, in particular a drill and / or percussion hammer, with a housing and a vibration-damped, with respect to the housing movable and resiliently supported U-shaped bow handle.
  • a hand tool machine which has a vibration-damped, supported by springs in relation to the housing strap handle.
  • extensions of two leg portions of the strap handle extend into a cavity of the housing where they act via connectors on pivot arms whose movement is damped by springs.
  • the two pivot arms connected by a coupling member in the form of an axis.
  • Within the hollow handle there is arranged a switch for switching on and off the power tool.
  • the present invention seeks to find a solution that allows to fit the bow handle of hand tool of the type mentioned with a switch, without affecting the function of a arranged in the region of the switch coupling member.
  • a preferred embodiment of the invention provides that the coupling member is formed on a part of its length as a laterally open hollow profile, while the rest of the coupling member may be formed either as a solid component or as a hollow profile closed on all sides to give the coupling member a high bending stiffness.
  • the coupling member is formed at least over part of its length as a rectangular box profile, the opposite side cheeks are expedient aligned parallel to each other and adjacent outer sides of the switch housing, while the bottom of the box profile is disposed on the side facing away from the switch housing of the coupling member.
  • the switch housing can dive far into the coupling member, which in its longitudinal direction despite the recess has a high bending stiffness and therefore allows the transmission of considerable contact forces from the strap handle into the housing of the power tool.
  • the switch is disposed in the vicinity of a pivot joint of the coupling member, where this is supported within the handle and stiffened by the support and where the movement path of the coupling member during a relative movement of the strap handle with respect to the hand tool least is, which can reduce the depth of immersion of the switch housing in the recess and thus also their depth.
  • the coupling member advantageously has two aligned, coaxial to the pivot axis of the pivot bearing pivot pin, which over the opposite Projecting side cheeks of the box section and each protrude into opposite bearing openings of the strap handle.
  • the switch is inserted into an opening of the housing of the machine tool facing the front boundary wall of the strap handle and has a projecting beyond the yoke of the strap handle, against the force of a spring in relation to the switch housing pivotable actuator which in a handle opening between the strap handle and the Housing protrudes.
  • Hand-held power tool 2 shown schematically in the form of a hammer drill or a percussion hammer consists essentially of a housing 4, a tool holder 6 for receiving a tool 8, and a drive device (not shown) enclosed by the housing 4 for rotating and beating driving of the tool holder 6 Tool 8.
  • the drive device consists in a known manner of an electric drive motor which rotatably drives the tool holder 6 via a reduction or manual transmission, and also from the drive motor driven striking mechanism with which the tool 8 can be acted upon in the tool holder 6 with a force acting in a working direction A of the machine tool 2 impact force.
  • the housing 4 is provided at its end facing away from the tool holder 6 front end with a strap handle 10 which is used together with a near the tool holder 6 at 12 releasably attached to the housing 4 auxiliary handle 14 for gripping and holding the machine tool 2.
  • the hanger handle 10 encloses together with the housing 4 a handle opening 16 for a hand of an operator and facilitates especially in vertical operation, ie vertical working direction A and downwardly directed tool 8, the holding and guiding the machine tool 2, while the auxiliary handle 14 is preferred is used in horizontally oriented or flat inclined working direction A.
  • the bow-shaped handle 10 On its side facing the handle opening 16, the bow-shaped handle 10 is provided with a switch 18 with which the hand-held power tool 2 can be switched on and off without letting go of the handle 10.
  • the housing 4 has two parallel, rearwardly to over the rear end face of the housing 4 projecting projections 20, 22 which are rigidly connected to the housing 4 and project into the hollow interior of the strap handle 10.
  • the hanger handle 10 consists essentially of a direction perpendicular to the working direction A of the power tool 2 hollow yoke 24, which is taken for use of the power tool 2 by the user with one hand, and two parallel to the working direction A of the power tool 2 hollow leg portions 26, 28, the their ends adjacent to the housing 4 are open, so that the extensions 20, 22 of the housing 4 in the leg portions 26, 28 can dip.
  • the hanger handle 10 In order to avoid that, for example, caused by the percussion of the machine tool 2 vibrations of the housing 4 are transmitted to the hanger handle 10, which felt by the operator not only unpleasant is, but may also have health effects after prolonged exposure, dive the two extensions 20, 22 of the housing 4 with large lateral play S in the hollow leg portions 26, 28 of the hanger handle 10 a.
  • the hanger handle 10 is not supported directly on the extensions 20, 22 or on the housing 4, but via a helical compression spring 30, which provides for a vibration isolation between the hanger handle 10 and the housing 4.
  • the two elongate coupling members 34, 36 are housed in the hollow interior of the yoke portion 24 of the strap handle 10, wherein they are generally aligned transversely to the working direction A and the longitudinal center plane 32 of the power tool 2.
  • Each of the two coupling members 34, 36 is designed as a two-armed lever which is mounted in the vicinity of its center in a pivot joint 38 and 40, so that it is pivotable with respect to the bow handle 10.
  • the front end of each coupling member 34, 36 pointing away from the longitudinal center plane 32 is articulated at the free end of the adjacent extension 20 or 22 via a pivot joint 42, 44, while the opposite inner end ends of the coupling members 34, 36 form a fork joint 46.
  • the front end of a coupling member 34 is formed as a fork 48, in which a spherical thickening 50 at the front end of the other coupling member 36 engages movable.
  • the fork joint 46 allows a certain longitudinal displacement of the two coupling members 34, 36 with respect to each other when they are pivoted in a relative movement between the strap handle 10 and the housing 4 about the pivot axes of the pivot joints 38 and 40.
  • the coupling member 36 is formed as a solid coupling rod, which is provided not only at its inner end but to form the pivot joints 40, 44 in the middle and at the outer end with a thickening
  • the coupling member 34 is on a portion of its length between his outer, hinged to the extension 20 front end and its inner, fork-shaped front end as a hollow hollow box profile open on one side with two parallel side walls 54 and a perpendicular bottom 56 formed as in Fig. 3 shown.
  • pivot joint 40 comprises a projecting into the hollow interior of the strap handle 10 projection 51 of the housing 4 facing the front boundary wall 52 of the yoke 24, while the pivot joint 38 of the coupling member 34 has two opposing aligned cylindrical bearing openings 62 in opposite boundary wall parts of the strap handle 10 and two outwardly beyond the side walls 54 projecting journals 60 which project into the bearing openings 62.
  • the two side walls 54 and the bottom 56 define a rectangular cross-section, the front boundary wall 52 of the yoke 24 open towards recess 58 which receives the inwardly beyond the boundary wall 52 protruding switch housing 64 of the switch 18 in such a manner that the pivoting movement of the Coupling member 34 is not hindered by the switch 18.
  • the recess 58 extends from the pivot joint 38, the pivot axis 66 passes through the switch housing 64, on both sides slightly beyond the opposite end faces of the switch housing 64 addition.
  • the switch housing 64 In order to fix the switch 18 on the strap handle 10 so that its switch housing 64 projects into the hollow interior of the yoke 24 and into the recess 58 of the coupling member 34 and a tilting or pivoting with respect to the switch housing 64 actuator 68 of the switch 18 to the outside over the boundary wall 52 protrudes into the handle opening 16, the switch housing 64 on its side adjacent to the actuator 68 side a cover plate 70, the outer edge over the longitudinal sides and the end faces of the housing 64 projects and during assembly of the switch 18 in Ironing handle 10 is inserted into a complementary recess 72 which is recessed in an edge of an opening for receiving the switch 18 serving opening 74 in the boundary wall 52.
  • this consists of two mirror-image half shells 76, 78, the assembled after insertion of the coupling members 34, 36 and the switch 18 in one of the two half shells 76, 78 and then welded together along a center plane 80 of the hanger handle 10, as in FIG Fig. 3 shown.
  • the invention can also be used in an analogous manner in the case of a hand tool machine whose bow handle is like that of the hand tool machine Figure 2 of the DE 101 38 123 A1 only has a partially projecting into the handle coupling member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

Die vorliegende Erfindung betrifft eine Handwerkzeugmaschine, insbesondere einen Bohr- und/oder Schlaghammer, mit einem Gehäuse und einem vibrationsgedämpften, in Bezug zum Gehäuse beweglichen und federnd abgestützten U-förmigen Bügelhandgriff.The present invention relates to a hand tool, in particular a drill and / or percussion hammer, with a housing and a vibration-damped, with respect to the housing movable and resiliently supported U-shaped bow handle.

Stand der TechnikState of the art

Insbesondere bei Handwerkzeugmaschinen mit einem schlagenden Antrieb, wie zum Beispiel bei Bohrhämmern, Meißelhämmern und dergleichen, kann die Handwerkzeugmaschine beträchtlichen Vibrationen ausgesetzt sein. Wenn diese Vibrationen auf einen zum Anpressen der Handwerkzeugmaschine gegen ein Werkstück dienenden Handgriff übertragen werden, wird dies vom Bediener nicht nur als unangenehm empfunden, sondern kann bei längerer Exposition auch Gesundheitsschäden zur Folgen haben. Daher werden zur linearen Vibrationsdämpfung von Bohrhämmern bisher zumeist Doppelschalengehäuse verwendet, bei denen der gesamte Hammer in seiner Arbeitsrichtung federnd in einer äußeren Schale aufgehängt ist. Diese Konstruktion ist jedoch verhältnismäßig aufwändig und daher auch teuer.In particular, in portable power tools with a beating drive, such as drill hammers, chippers and the like, the power tool can be exposed to considerable vibration. If these vibrations are transmitted to a handle used to press the hand tool against a workpiece, this is not only perceived as unpleasant by the operator, but may also result in health damage on prolonged exposure. Therefore, for the linear vibration damping of rotary hammers so far mostly double shell housing used in which the entire hammer is suspended in its working direction resiliently in an outer shell. However, this construction is relatively expensive and therefore expensive.

Aus der EP 1 529 603 ist bereits eine Handwerkzeugmaschine bekannt, die einen vibrationsgedämpften, über Federn in Bezug zum Gehäuse abgestützten Bügelhandgriff aufweist. Bei dieser Handwerkzeugmaschine erstrecken sich Verlängerungen von zwei Schenkelteilen des Bügelhandgriffs bis in einen Hohlraum des Gehäuses, wo sie über Verbinder auf Schwenkarme einwirken, deren Bewegung durch Federn gedämpft wird. Zur Synchronisierung der Bewegung der Schwenkarme und damit der beiden Schenkelteile sind die beiden Schwenkarme durch ein Koppelglied in Form einer Achse verbunden. Innerhalb des hohlen Handgriffs ist dort ein Schalter zum Ein- und Ausschalten der Handwerkzeugmaschine angeordnet.From the EP 1 529 603 A hand tool machine is already known, which has a vibration-damped, supported by springs in relation to the housing strap handle. In this hand tool, extensions of two leg portions of the strap handle extend into a cavity of the housing where they act via connectors on pivot arms whose movement is damped by springs. To synchronize the movement of the pivot arms and thus the two leg parts are the two pivot arms connected by a coupling member in the form of an axis. Within the hollow handle there is arranged a switch for switching on and off the power tool.

Aus der DE 101 38 123 A1 ist bereits eine Handwerkzeugmaschine der eingangs genannten Art mit einem vibrationsgedämpften Bügelhandgriff bekannt, bei dem sich einer der beiden Schenkelteile über eine Feder gegen das Gehäuse abstützt und bei dem die Bewegung der beiden Schenkelteile durch zwei gelenkig mit dem Handgriff und dem Gehäuse verbundene Koppelglieder synchronisiert wird, von denen eines platzsparend im Inneren des hohlen Jochteils untergebracht ist.From the DE 101 38 123 A1 is already a hand tool of the type mentioned with a vibration-damped bow handle known, in which one of the two leg parts is supported by a spring against the housing and in which the movement of the two leg parts is synchronized by two hingedly connected to the handle and the housing coupling members, one of which saves space inside the hollow yoke section.

Darüber hinaus wurde auch in den beiden Patentanmeldungen W02007/128634 A1 und W02007/115845 A1 der Anmelderin, die nur zum Stand der Technik gemäß Artikel 54(3) EPÜ gehören, eine Handwerkzeugmaschine vorgeschlagen, die ein Gehäuse und einen mindestens teilweise hohlen U-förmigen Bügelhandgriff mit einem Jochteil und zwei parallelen Schenkelteilen umfasst, der zur Vibrationsdämpfung in Bezug zum Gehäuse beweglich und federnd abgestützt ist, sowie zwei Koppelglieder zur Synchronisierung von Bewegungen der beiden Schenkelteile, die mindestens teilweise im Inneren des Bügelhandgriffs untergebracht sind.In addition, also in the two patent applications W02007 / 128634 A1 and W02007 / 115845 A1 The Applicant, which belongs only to the prior art under Article 54 (3) EPC, proposed a portable power tool comprising a housing and an at least partially hollow U-shaped strap handle with a yoke part and two parallel leg parts for vibration damping with respect to the housing is movably and resiliently supported, and two coupling members for synchronizing movements of the two leg parts, which are housed at least partially inside the strap handle.

Durch die Unterbringung von einem oder mehreren Koppelgliedern im Inneren des hohlen Bügelhandgriffs kann der Platzbedarf im Inneren des Gehäuses der Handwerkzeugmaschine und damit deren Baulänge verringert werden, wodurch wiederum der zur Handhabung der Handwerkzeugmaschine erforderliche Kraftaufwand verringert werden kann. Jedoch war eine solche Anordnung bisher nur bei solchen Handwerkzeugmaschinen möglich, bei denen am Bügelhandgriff kein Schalter vorgesehen war, da das Platzangebot im Inneren desselben nicht ausreichend war, um sowohl die Unterbringung eines nach innen ragenden Gehäuses des Schalters als auch von einem oder mehreren Koppelgliedern zu ermöglichen.By accommodating one or more coupling members in the interior of the hollow bow handle, the space required in the interior of the housing of the power tool and thus the overall length can be reduced, which in turn required for handling the power tool force can be reduced. However, such an arrangement has hitherto been possible only in those hand tool machines in which the switch handle was provided no switch, since the space inside it was not sufficient to accommodate both the housing of an inwardly projecting housing of the switch and one or more coupling links enable.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, eine Lösung zu finden, die es gestattet, den Bügelhandgriff von Handwerkzeugmaschinen der eingangs genannten Art mit einem Schalter zu bestücken, ohne die Funktion eines im Bereich des Schalters angeordneten Koppelgliedes zu beeinträchtigen.Proceeding from this, the present invention seeks to find a solution that allows to fit the bow handle of hand tool of the type mentioned with a switch, without affecting the function of a arranged in the region of the switch coupling member.

Offenbarung der ErfindungDisclosure of the invention

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Anspruch 1 gelöst. Indem man das Koppelglied im Bereich des Schalters mit einer Ausnehmung versieht, in die ein ins Innere des Bügelhandgriffs ragendes Schaltergehäuse des Schalters eintauchen kann, lässt sich der Schalter mit einfachen Mitteln ohne jegliche Beeinträchtigung der Funktion des Koppelgliedes am Handgriff anbringen.This object is achieved by the features in claim 1. By providing the coupling member in the region of the switch with a recess into which a switch housing of the switch projecting into the inside of the bow handle can dip, the switch can be attached to the handle with simple means without any impairment of the function of the coupling member.

Eine bevorzugte Ausgestaltung der Erfindung sieht vor, dass das Koppelglied auf einem Teil seiner Länge als seitlich offenes Hohlprofil ausgebildet ist, während der Rest des Koppelgliedes entweder als massives Bauteil oder als allseitig geschlossenes Hohlprofil ausgebildet sein kann, um dem Koppelglied eine hohe Biegesteifigkeit zu verleihen.A preferred embodiment of the invention provides that the coupling member is formed on a part of its length as a laterally open hollow profile, while the rest of the coupling member may be formed either as a solid component or as a hollow profile closed on all sides to give the coupling member a high bending stiffness.

Vorzugsweise ist das Koppelglied mindestens auf einem Teil seiner Länge als rechteckiges Kastenprofil ausgebildet, dessen entgegengesetzte Seitenwangen zweckmäßig parallel zueinander und zu benachbarten Außenseiten des Schaltergehäuses ausgerichtet sind, während der Boden des Kastenprofils auf der vom Schaltergehäuse abgewandten Seite des Koppelgliedes angeordnet ist. Auf diese Weise kann das Schaltergehäuse weit in das Koppelglied eintauchen, das in seiner Längsrichtung trotz der Ausnehmung eine hohe Biegesteifigkeit besitzt und daher die Übertragung beträchtlicher Anpresskräfte aus dem Bügelhandgriff in das Gehäuse der Handwerkzeugmaschine gestattet.Preferably, the coupling member is formed at least over part of its length as a rectangular box profile, the opposite side cheeks are expedient aligned parallel to each other and adjacent outer sides of the switch housing, while the bottom of the box profile is disposed on the side facing away from the switch housing of the coupling member. In this way, the switch housing can dive far into the coupling member, which in its longitudinal direction despite the recess has a high bending stiffness and therefore allows the transmission of considerable contact forces from the strap handle into the housing of the power tool.

Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung ist der Schalter in der Nähe eines Schwenkgelenks des Koppelgliedes angeordnet, wo sich dieses innerhalb des Handgriffs abstützt und durch die Abstützung zusätzlich versteift ist und wo der Bewegungsweg des Koppelgliedes während einer Relativbewegung des Bügelhandgriffs in Bezug zur Handwerkzeugmaschine am geringsten ist, wodurch sich die Eintauchtiefe des Schaltergehäuses in die Ausnehmung und damit auch deren Tiefe verringern lässt.According to a further advantageous embodiment of the invention, the switch is disposed in the vicinity of a pivot joint of the coupling member, where this is supported within the handle and stiffened by the support and where the movement path of the coupling member during a relative movement of the strap handle with respect to the hand tool least is, which can reduce the depth of immersion of the switch housing in the recess and thus also their depth.

Um für eine gute Abstützung des Koppelgliedes im Schwenklager zu sorgen, weist das Koppelglied vorteilhaft zwei fluchtende, zur Schwenkachse des Schwenklagers koaxiale Schwenkzapfen auf, die über die entgegengesetzten Seitenwangen des Kastenprofils überstehen und jeweils in gegenüberliegende Lageröffnungen des Bügelhandgriffs ragen.In order to ensure good support of the coupling member in the pivot bearing, the coupling member advantageously has two aligned, coaxial to the pivot axis of the pivot bearing pivot pin, which over the opposite Projecting side cheeks of the box section and each protrude into opposite bearing openings of the strap handle.

Vorzugsweise ist der Schalter in eine Öffnung einer dem Gehäuse der Werkzeugmaschine zugewandten vorderen Begrenzungswand des Bügelhandgriffs eingesetzt und weist ein über den Jochteil des Bügelhandgriffs überstehendes, entgegen der Kraft einer Feder in Bezug zum Schaltergehäuse verschwenkbares Betätigungselement auf, das in eine Grifföffnung zwischen dem Bügelhandgriff und dem Gehäuse ragt.Preferably, the switch is inserted into an opening of the housing of the machine tool facing the front boundary wall of the strap handle and has a projecting beyond the yoke of the strap handle, against the force of a spring in relation to the switch housing pivotable actuator which in a handle opening between the strap handle and the Housing protrudes.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1: eine vereinfachte schematische Seitenansicht einer Handwerkzeugmaschine;
  • Fig. 2: eine teilweise geschnittene vergrößerte Seitenansicht eines hinteren Griffbereichs der Handwerkzeugmaschine aus Fig. 1 bei unbelastetem Handgriff;
  • Fig. 3: eine vergrößerte Schnittansicht entlang der Linie III-III der Fig. 2.
In the following the invention will be explained in more detail with reference to an embodiment shown in the drawing. Show it:
  • Fig. 1 a simplified schematic side view of a hand tool;
  • Fig. 2 a partially sectioned enlarged side view of a rear handle portion of the power tool from Fig. 1 with unloaded handle;
  • Fig. 3 FIG. 4 is an enlarged sectional view taken along the line III-III of FIG Fig. 2 ,

Ausführungsform der ErfindungEmbodiment of the invention

Die in Fig. 1 schematisch dargestellte Handwerkzeugmaschine 2 in Form eines Bohrhammers oder eines Schlaghammers besteht im Wesentlichen aus einem Gehäuse 4, einem Werkzeughalter 6 zur Aufnahme eines Werkzeugs 8, sowie einer vom Gehäuse 4 umschlossenen Antriebseinrichtung (nicht dargestellt) zum drehenden und schlagenden Antreiben des in den Werkzeughalter 6 eingesetzten Werkzeugs 8.In the Fig. 1 Hand-held power tool 2 shown schematically in the form of a hammer drill or a percussion hammer consists essentially of a housing 4, a tool holder 6 for receiving a tool 8, and a drive device (not shown) enclosed by the housing 4 for rotating and beating driving of the tool holder 6 Tool 8.

Die Antriebseinrichtung besteht in bekannter Weise aus einem elektrischen Antriebsmotor, der den Werkzeughalter 6 über ein Untersetzungs- bzw. Schaltgetriebe drehend antreibt, sowie einem ebenfalls vom Antriebsmotor angetriebenen Schlagwerk, mit dem das Werkzeug 8 im Werkzeughalter 6 mit einer in einer Arbeitsrichtung A der Werkzeugmaschine 2 wirkenden Schlagkraft beaufschlagt werden kann.The drive device consists in a known manner of an electric drive motor which rotatably drives the tool holder 6 via a reduction or manual transmission, and also from the drive motor driven striking mechanism with which the tool 8 can be acted upon in the tool holder 6 with a force acting in a working direction A of the machine tool 2 impact force.

Das Gehäuse 4 ist an seinem vom Werkzeughalter 6 abgewandten Stirnende mit einem Bügelhandgriff 10 versehen, der zusammen mit einem in der Nähe des Werkzeughalters 6 bei 12 lösbar am Gehäuse 4 angebrachten Zusatzhandgriff 14 zum Ergreifen und Halten der Werkzeugmaschine 2 dient. Der Bügelhandgriff 10 umschließt zusammen mit dem Gehäuse 4 eine Grifföffnung 16 für eine Hand eines Bedieners und erleichtert besonders im senkrechten Betrieb, das heißt bei vertikaler Arbeitsrichtung A und nach unten gerichtetem Werkzeug 8, das Festhalten und Führen der Werkzeugmaschine 2, während der Zusatzhandgriff 14 bevorzugt bei horizontal ausgerichteter oder flach geneigter Arbeitsrichtung A zum Einsatz kommt.The housing 4 is provided at its end facing away from the tool holder 6 front end with a strap handle 10 which is used together with a near the tool holder 6 at 12 releasably attached to the housing 4 auxiliary handle 14 for gripping and holding the machine tool 2. The hanger handle 10 encloses together with the housing 4 a handle opening 16 for a hand of an operator and facilitates especially in vertical operation, ie vertical working direction A and downwardly directed tool 8, the holding and guiding the machine tool 2, while the auxiliary handle 14 is preferred is used in horizontally oriented or flat inclined working direction A.

Auf seiner der Grifföffnung 16 zugewandten Seite ist der Bügelhandgriff 10 mit einem Schalter 18 versehen, mit dem sich die Handwerkzeugmaschine 2 ein- und ausschalten lässt, ohne dabei den Handgriff 10 loszulassen.On its side facing the handle opening 16, the bow-shaped handle 10 is provided with a switch 18 with which the hand-held power tool 2 can be switched on and off without letting go of the handle 10.

Wie am besten in Fig. 2 dargestellt, weist das Gehäuse 4 zwei parallele, nach hinten zu über das hintere Stirnende des Gehäuses 4 überstehende Fortsätze 20, 22 auf, die starr mit dem Gehäuse 4 verbunden sind und ins hohle Innere des Bügelhandgriffs 10 ragen.How best in Fig. 2 illustrated, the housing 4 has two parallel, rearwardly to over the rear end face of the housing 4 projecting projections 20, 22 which are rigidly connected to the housing 4 and project into the hollow interior of the strap handle 10.

Der Bügelhandgriff 10 besteht im Wesentlichen aus einem zur Arbeitsrichtung A der Handwerkzeugmaschine 2 senkrechten hohlen Jochteil 24, der zum Gebrauch der Handwerkzeugmaschine 2 vom Benutzer mit einer Hand ergriffen wird, sowie zwei zur Arbeitsrichtung A der Handwerkzeugmaschine 2 parallelen hohlen Schenkelteilen 26, 28, die an ihren zum Gehäuse 4 benachbarten Stirnenden offen sind, so dass die Fortsätze 20, 22 des Gehäuses 4 in die Schenkelteile 26, 28 eintauchen können.The hanger handle 10 consists essentially of a direction perpendicular to the working direction A of the power tool 2 hollow yoke 24, which is taken for use of the power tool 2 by the user with one hand, and two parallel to the working direction A of the power tool 2 hollow leg portions 26, 28, the their ends adjacent to the housing 4 are open, so that the extensions 20, 22 of the housing 4 in the leg portions 26, 28 can dip.

Um zu vermeiden, dass zum Beispiel vom Schlagwerk der Werkzeugmaschine 2 hervorgerufene Vibrationen des Gehäuses 4 auf den Bügelhandgriff 10 übertragen werden, was vom Bediener nicht nur als unangenehm empfunden wird, sondern bei längerer Exposition auch Gesundheitsschäden zur Folgen haben kann, tauchen die beiden Fortsätze 20, 22 des Gehäuses 4 mit großem seitlichem Spiel S in die hohlen Schenkelteile 26, 28 des Bügelhandgriffs 10 ein. Außerdem stützt sich der Bügelhandgriff 10 nicht direkt auf den Fortsätzen 20, 22 oder auf dem Gehäuse 4 ab, sondern über eine Schraubendruckfeder 30, die für eine Schwingungsentkopplung zwischen dem Bügelhandgriff 10 und dem Gehäuse 4 sorgt.In order to avoid that, for example, caused by the percussion of the machine tool 2 vibrations of the housing 4 are transmitted to the hanger handle 10, which felt by the operator not only unpleasant is, but may also have health effects after prolonged exposure, dive the two extensions 20, 22 of the housing 4 with large lateral play S in the hollow leg portions 26, 28 of the hanger handle 10 a. In addition, the hanger handle 10 is not supported directly on the extensions 20, 22 or on the housing 4, but via a helical compression spring 30, which provides for a vibration isolation between the hanger handle 10 and the housing 4.

Um ein Verkanten oder Verkippen des derart vom Gehäuse 4 entkoppelten Bügelhandgriffs 10 zu vermeiden, wenn beim Arbeiten mit der Handwerkzeugmaschine 2 in Arbeitsrichtung A eine Andruckkraft auf den Bügelhandgriff 10 aufgebracht wird und diese Andruckkraft entweder nicht ganz parallel zur Arbeitsrichtung A oder einseitig auf einer Seite einer Längsmittelebene 32 (Fig. 1) der Handwerkzeugmaschine 2 auf den Bügelhandgriff 10 aufgebracht wird, werden die Bewegungen der beiden hohlen Schenkelteile 26, 28 entlang der Fortsätze 20, 22 mit Hilfe zweier Koppelglieder 34, 36 synchronisiert.In order to avoid jamming or tilting of the thus decoupled from the housing 4 bow handle 10, when working with the power tool 2 in the working direction A, a pressing force is applied to the hanger handle 10 and this pressure force either not completely parallel to the working direction A or one side on one side Longitudinal median plane 32 ( Fig. 1 ) of the hand tool 2 is applied to the hanger handle 10, the movements of the two hollow leg portions 26, 28 along the extensions 20, 22 by means of two coupling members 34, 36 are synchronized.

Die beiden langgestreckten Koppelglieder 34, 36 sind im hohlen Inneren des Jochteils 24 des Bügelhandgriffs 10 untergebracht, wobei sie allgemein quer zur Arbeitsrichtung A und der Längsmittelebene 32 der Handwerkzeugmaschine 2 ausgerichtet sind. Jedes der beiden Koppelglieder 34, 36 ist als zweiarmiger Hebel ausgebildet, der in der Nähe seiner Mitte in einem Schwenkgelenk 38 bzw. 40 gelagert ist, so dass er in Bezug zum Bügelhandgriff 10 verschwenkbar ist. Das von der Längsmittelebene 32 weg nach außen weisende Stirnende jedes Koppelgliedes 34, 36 ist über ein Schwenkgelenk 42 bzw. 44 am freien Ende des benachbarten Fortsatzes 20 bzw. 22 angelenkt, während die entgegengesetzten inneren Stirnenden der Koppelglieder 34, 36 ein Gabelgelenk 46 bilden. Zur Bildung des Gabelgelenks 46 ist das Stirnende des einen Koppelgliedes 34 als Gabel 48 ausgebildet, in die eine kugelige Verdickung 50 am Stirnende des anderen Koppelgliedes 36 beweglich eingreift. Das Gabelgelenk 46 ermöglicht eine gewisse Längsverschiebung der beiden Koppelglieder 34, 36 in Bezug zueinander, wenn diese bei einer Relativbewegung zwischen dem Bügelhandgriff 10 und dem Gehäuse 4 um die Schwenkachsen der Schwenkgelenke 38 und 40 verschwenkt werden.The two elongate coupling members 34, 36 are housed in the hollow interior of the yoke portion 24 of the strap handle 10, wherein they are generally aligned transversely to the working direction A and the longitudinal center plane 32 of the power tool 2. Each of the two coupling members 34, 36 is designed as a two-armed lever which is mounted in the vicinity of its center in a pivot joint 38 and 40, so that it is pivotable with respect to the bow handle 10. The front end of each coupling member 34, 36 pointing away from the longitudinal center plane 32 is articulated at the free end of the adjacent extension 20 or 22 via a pivot joint 42, 44, while the opposite inner end ends of the coupling members 34, 36 form a fork joint 46. To form the fork joint 46, the front end of a coupling member 34 is formed as a fork 48, in which a spherical thickening 50 at the front end of the other coupling member 36 engages movable. The fork joint 46 allows a certain longitudinal displacement of the two coupling members 34, 36 with respect to each other when they are pivoted in a relative movement between the strap handle 10 and the housing 4 about the pivot axes of the pivot joints 38 and 40.

Während das Koppelglied 36 als massive Koppelstange ausgebildet ist, die nicht nur an ihrem inneren Stirnende sondern zur Ausbildung der Schwenkgelenke 40, 44 auch in der Mitte und am äußeren Stirnende mit einer Verdickung versehen ist, ist das Koppelglied 34 auf einem Teil seiner Länge zwischen seinem äußeren, am Fortsatz 20 angelenkten Stirnende und seinem inneren, gabelförmig ausgebildeten Stirnende als einseitig offenes hohles Kastenprofil mit zwei parallelen Seitenwangen 54 und einem dazu senkrechten Boden 56 ausgebildet, wie in Fig. 3 dargestellt. Darüber hinaus umfasst das Schwenkgelenk 40 einen ins hohle Innere des Bügelhandgriffs 10 ragenden Vorsprung 51 einer dem Gehäuse 4 zugewandten vorderen Begrenzungswand 52 des Jochteils 24, während das Schwenkgelenk 38 des Koppelgliedes 34 zwei einander gegenüberliegende fluchtende zylindrische Lageröffnungen 62 in entgegengesetzten Begrenzungswandteilen des Bügelhandgriffs 10 sowie zwei nach außen über die Seitenwangen 54 überstehende Lagerzapfen 60 umfasst, die in die Lageröffnungen 62 ragen.While the coupling member 36 is formed as a solid coupling rod, which is provided not only at its inner end but to form the pivot joints 40, 44 in the middle and at the outer end with a thickening, the coupling member 34 is on a portion of its length between his outer, hinged to the extension 20 front end and its inner, fork-shaped front end as a hollow hollow box profile open on one side with two parallel side walls 54 and a perpendicular bottom 56 formed as in Fig. 3 shown. In addition, the pivot joint 40 comprises a projecting into the hollow interior of the strap handle 10 projection 51 of the housing 4 facing the front boundary wall 52 of the yoke 24, while the pivot joint 38 of the coupling member 34 has two opposing aligned cylindrical bearing openings 62 in opposite boundary wall parts of the strap handle 10 and two outwardly beyond the side walls 54 projecting journals 60 which project into the bearing openings 62.

Die beiden Seitenwangen 54 und der Boden 56 begrenzen eine im Querschnitt rechteckige, zur vorderen Begrenzungswand 52 des Jochteils 24 hin offene Ausnehmung 58, die das nach innen über die Begrenzungswand 52 überstehende Schaltergehäuse 64 des Schalters 18 in einer solchen Weise aufnimmt, dass die Schwenkbewegung des Koppelgliedes 34 durch den Schalter 18 nicht behindert wird. Dazu erstreckt sich die Ausnehmung 58 vom Schwenkgelenk 38, dessen Schwenkachse 66 das Schaltergehäuse 64 durchsetzt, nach beiden Seiten etwas über die entgegengesetzten Stirnseiten des Schaltergehäuses 64 hinaus.The two side walls 54 and the bottom 56 define a rectangular cross-section, the front boundary wall 52 of the yoke 24 open towards recess 58 which receives the inwardly beyond the boundary wall 52 protruding switch housing 64 of the switch 18 in such a manner that the pivoting movement of the Coupling member 34 is not hindered by the switch 18. For this purpose, the recess 58 extends from the pivot joint 38, the pivot axis 66 passes through the switch housing 64, on both sides slightly beyond the opposite end faces of the switch housing 64 addition.

Um den Schalter 18 derart am Bügelhandgriff 10 zu befestigen, dass sein Schaltergehäuse 64 ins hohle Innere des Jochteils 24 bzw. in die Ausnehmung 58 des Koppelgliedes 34 ragt und ein in Bezug zum Schaltergehäuse 64 kipp- oder schwenkbares Betätigungselement 68 des Schalters 18 nach außen über die Begrenzungswand 52 in die Grifföffnung 16 hinein übersteht, weist das Schaltergehäuse 64 an seiner zum Betätigungselement 68 benachbarten Seite eine Abdeckplatte 70 auf, deren äußerer Rand über die Längsseiten und die Stirnseiten des Gehäuses 64 übersteht und bei der Montage des Schalters 18 im Bügelhandgriff 10 in eine komplementäre Ausnehmung 72 eingesetzt wird, die in einem Rand einer zur Aufnahme des Schalters 18 dienenden Öffnung 74 in der Begrenzungswand 52 ausgespart ist.In order to fix the switch 18 on the strap handle 10 so that its switch housing 64 projects into the hollow interior of the yoke 24 and into the recess 58 of the coupling member 34 and a tilting or pivoting with respect to the switch housing 64 actuator 68 of the switch 18 to the outside over the boundary wall 52 protrudes into the handle opening 16, the switch housing 64 on its side adjacent to the actuator 68 side a cover plate 70, the outer edge over the longitudinal sides and the end faces of the housing 64 projects and during assembly of the switch 18 in Ironing handle 10 is inserted into a complementary recess 72 which is recessed in an edge of an opening for receiving the switch 18 serving opening 74 in the boundary wall 52.

Um die Montage der Koppelglieder 34, 36 und des Schalters 18 im Bügelgriff 10 zu ermöglichen, besteht dieser aus zwei spiegelbildlichen Halbschalen 76, 78, die nach dem Einsetzen der Koppelglieder 34, 36 und des Schalters 18 in eine der beiden Halbschalen 76, 78 zusammengefügt und dann entlang einer Mittelebebene 80 des Bügelhandgriffs 10 miteinander verschweißt werden, wie in Fig. 3 dargestellt.In order to allow the mounting of the coupling members 34, 36 and the switch 18 in the bow handle 10, this consists of two mirror-image half shells 76, 78, the assembled after insertion of the coupling members 34, 36 and the switch 18 in one of the two half shells 76, 78 and then welded together along a center plane 80 of the hanger handle 10, as in FIG Fig. 3 shown.

Die Erfindung ist in analoger Weise auch bei einer Handwerkzeugmaschine einsetzbar, deren Bügelhandgriff wie derjenige der Handwerkzeugmaschine aus Abbildung 2 der DE 101 38 123 A1 nur ein teilweise in den Handgriff ragendes Koppelglied aufweist.The invention can also be used in an analogous manner in the case of a hand tool machine whose bow handle is like that of the hand tool machine Figure 2 of the DE 101 38 123 A1 only has a partially projecting into the handle coupling member.

Claims (10)

  1. Portable power tool (2), in particular a rotary and/or percussion hammer, comprising a housing (4) and an at least partly hollow U-shaped bow-type handle (10) having a yoke part (24) and two parallel leg parts (26, 28), said bow-type handle (10) being movably and elastically supported with respect to the housing (10) in order to dampen vibrations, and comprising at least one coupling element (34, 36) for synchronizing movements of the two leg parts (26, 28), said coupling element (34, 36) being accommodated entirely or partly in the interior of the bow-type handle (10), wherein the bow-type handle (10) is provided with a switch (18) in the vicinity of the coupling element (34), characterized in that the coupling element (34) has a recess (58) for accommodating a switch housing (64), projecting into the interior of the bow-type handle (10), of the switch (18).
  2. Portable power tool according to Claim 1, characterized in that the coupling element (34) is designed as a laterally open hollow section at least over part of its length.
  3. Portable power tool according to Claim 1 or 2, characterized in that the coupling element (34) is designed as a rectangular box section (54, 56) at least over part of its length.
  4. Portable power tool according to Claim 3, characterized in that opposite sides of the switch housing (58) are oriented parallel to one another and parallel to two opposite side cheeks (54) of the box section (54, 56).
  5. Portable power tool according to one of the preceding claims, characterized in that the switch (18) is arranged in the vicinity of a pivot joint (38) of the coupling element (34).
  6. Portable power tool according to one of the preceding claims, characterized in that the switch (18) is inserted into an opening (74) in a boundary wall (52) of the bow-type handle (10).
  7. Portable power tool according to Claim 6, characterized in that the switch (18) is inserted into an opening (74) in a front boundary wall (52), facing the housing (4) of the power tool (2), of the bow-type handle (10).
  8. Portable power tool according to Claim 7, characterized in that an actuating element (68) of the switch (18) projects into a handle opening (16) defined by the bow-type handle (10) and by the housing (4).
  9. Portable power tool according to one of Claims 5 to 8, characterized in that the pivot joint (38) comprises two aligned cylindrical bearing openings (62) in boundary wall parts of the bow-type handle (10) and two pivot pins (60) projecting beyond the coupling element (34) on opposite sides and engaging in the bearing openings (62).
  10. Portable power tool according to one of Claims 5 to 9, characterized in that the pivot joint (38) has a pivot axis (66) passing through the switch housing (64).
EP07820070A 2006-11-03 2007-09-07 Hand-held machine tool with a vibration-damped handle provided with a switch Not-in-force EP2086726B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006051924A DE102006051924A1 (en) 2006-11-03 2006-11-03 Hand tool with a vibration-damped, provided with a switch handle
PCT/EP2007/059415 WO2008052832A1 (en) 2006-11-03 2007-09-07 Hand-held machine tool with a vibration-damped handle provided with a switch

Publications (2)

Publication Number Publication Date
EP2086726A1 EP2086726A1 (en) 2009-08-12
EP2086726B1 true EP2086726B1 (en) 2010-01-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07820070A Not-in-force EP2086726B1 (en) 2006-11-03 2007-09-07 Hand-held machine tool with a vibration-damped handle provided with a switch

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US (1) US7971656B2 (en)
EP (1) EP2086726B1 (en)
CN (1) CN101535005B (en)
DE (2) DE102006051924A1 (en)
RU (1) RU2443540C2 (en)
WO (1) WO2008052832A1 (en)

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Also Published As

Publication number Publication date
DE102006051924A1 (en) 2008-05-15
US7971656B2 (en) 2011-07-05
RU2009120875A (en) 2010-12-10
EP2086726A1 (en) 2009-08-12
US20090272553A1 (en) 2009-11-05
DE502007002644D1 (en) 2010-03-04
CN101535005A (en) 2009-09-16
RU2443540C2 (en) 2012-02-27
WO2008052832A1 (en) 2008-05-08
CN101535005B (en) 2011-01-26

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