EP2097220B1 - Portable power tool for a rotating tool comprising a protective hood - Google Patents

Portable power tool for a rotating tool comprising a protective hood Download PDF

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Publication number
EP2097220B1
EP2097220B1 EP07803583A EP07803583A EP2097220B1 EP 2097220 B1 EP2097220 B1 EP 2097220B1 EP 07803583 A EP07803583 A EP 07803583A EP 07803583 A EP07803583 A EP 07803583A EP 2097220 B1 EP2097220 B1 EP 2097220B1
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EP
European Patent Office
Prior art keywords
neck
protective hood
power tool
portable power
tool according
Prior art date
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Application number
EP07803583A
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German (de)
French (fr)
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EP2097220A1 (en
Inventor
Florian Esenwein
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Robert Bosch GmbH
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Robert Bosch GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • Hand tool machines for rotating, preferably disc-shaped tools are known. They are used, for example, as angle grinders variously.
  • Protective hoods are provided in such hand tool machines which have the task of keeping the sparks and material particles being thrown away from the operator or from areas of the environment when working with the portable power tool by the rotating tool, for example grinding or cutting disks.
  • the guard should also protect the user and the environment in the event of destruction of the tool. It may happen, for example, that a cutting disc breaks in the workpiece when it is tilted there in the rotation. It must be ensured by the protective hood that fragments of the crushed cutting disc, which are thrown away with high energy sometimes, not reach the area of the operator.
  • the protective covers cover the workpiece only in segments, for example in an angular range of about 180 °, to leave the operator sufficient freedom of work on the rotating tool and workpiece.
  • it is known in the prior art to detachably secure the protective hood for example by means of a tensioning band arranged on the protective hood.
  • solutions are known in which the clamping band is expanded and reduced by loosening and tightening a clamping screw in the circumference, so that the protective hood is held by a clamping action on the machine neck.
  • the object of the invention is to present a development that allows greater protection for the operator of the power tool with greater comfort.
  • a hand tool machine for a rotating, preferably disc-shaped tool, with a machine housing having a machine neck to which a protective cover for at least partially covering the tool is releasably attached, wherein the protective hood has a guard neck and provided for releasably securing a clamp and wherein at least one recess for engagement of the engagement element is arranged / formed on the guard collar and on the guard neck and on the machine neck to form a rotation safeguard acting between the machine neck and the guard.
  • the protective hood is consequently a component which is separate from the hand tool machine, with the clamping clamp in turn being a separate component for the protective hood.
  • the guard has a guard neck which attaches to the machine housing is, in particular slipped over the engine neck formed on the machine housing and can be released from there again, and the clamp in turn serves to attach the protective hood neck.
  • the tension clamp has an engagement element which can cooperate with at least one recess on the guard neck or on the guard neck and on the machine neck. Upon engagement of this engagement element in the recess, a rotation of the guard on the machine neck is prevented because the engagement element passes through the guard neck, or passes through the guard neck and also engages in a formed on the machine neck recess, so that the guard neck over the engagement of the engagement member in the at least one recess is locked.
  • the clamp is formed as a separate component and fixed to the machine housing.
  • the separate training of the clamp and attachment to the machine housing frees the clamping hood of the clamping mechanism as such.
  • the clamping hood on the one hand easier to handle, on the other hand, this embodiment allows to use the clamp in a specific, defined manner and about to attach to the machine housing, regardless of the position of the protective hood relative to the machine housing.
  • the guard neck is encompassed by the clamp.
  • the clamp thus engages around the guard neck more or less completely, depending on the design of the clamp as a closed or open ring, and thus causes the determination of the guard over the attached guard neck.
  • the protective neck surrounds or partially engages around the machine neck.
  • the protective neck neck thus comprises the machine neck completely or at least partially. This allows extensive freedom in the manner in which the protective hood is to be arranged relative to the machine housing, in particular in the embodiment of partial encasement.
  • the machine neck and / or the guard neck has a compensating element, in particular a ring consisting of elastic material, in particular rubber, in order to compensate for tolerances between the guard neck and the machine neck.
  • a compensating element in particular a ring consisting of elastic material, in particular rubber, in order to compensate for tolerances between the guard neck and the machine neck.
  • the guard neck is designed as a ring element or as a ring segment element.
  • a ring element of the guard neck is arranged annularly on the protective hood, in particular concentric with the outer circumference of the circular segment, which is covered by the protective hood.
  • a ring segment element of the guard neck is only partially formed, so not as a solid ring, preferably in such a way that it covers the range in the angular range, which is also covered by the guard itself. This results in a particularly large freedom in arrangement and determination of the protective hood relative to the machine housing.
  • the clamping collar has a clamping device which reduces its diameter during clamping.
  • This clamping device can be configured for example by a screw with a corresponding mating thread, wherein the clamp is in turn designed as an open ring, which is closed by the clamping device.
  • the clamp has an engagement element and a clamping device. Engagement element and engaging means are therefore different.
  • the engagement element is used to fix the guard on the machine neck against axial rotation, whereas the clamping device causes a fixation in any respect, especially against slipping from the machine neck.
  • the clamping device is designed as a lever having the engagement element.
  • the circumferential enlargement and reduction of the clamp is thus carried out via a lever known from the prior art, which opens or closes the clamp designed as an open ring, but wherein the lever has the engagement element, the engagement element, in particular on the lever formed on the underside or on this is arranged.
  • the lever for fixing the engagement position of the engagement element is spring-loaded.
  • the arranged on the lever engaging element is therefore always engaged in the at least one recess, unless the lever is opened against its spring load. In this way, an unintentional adjustment or removal of the protective hood is not possible because it must be decidedly counteracted against the spring load, for example, but not necessarily, at the same time, the clamping device can be opened.
  • the engagement element is arranged on an engagement lever, and the tensioning device can be actuated via a tensioning lever.
  • the engagement element consequently has a separate engagement lever which operates exclusively the engagement element, without simultaneously actuating or displaying the tensioning device.
  • the clamping device is in this case actuated in another way, for example via a clamping lever.
  • the engagement element is a screw. This embodiment is particularly recommended for embodiments in which the protective hood is to be adjusted with a tool and / or where frequent adjustment of the guard relative to the machine housing is not required, so that the execution with a lever-operated engagement element is not required.
  • the anti-rotation device is provided by means of the engagement element and by means of a on the guard neck or on the guard neck and the machine neck arranged sequence of recesses designed as adjustable twisting the guard relative to the machine neck.
  • a twisting device of the protective cover can be formed relative to the machine neck and thus to the machine housing, in any position as dictated by the sequence of recesses.
  • the protective hood can be fixed by simple engagement of the engagement element in the respective recess.
  • the clamping clamp has at least one fastening tab, which preferably extends radially and serves for fastening to the machine housing.
  • a fastening tab may be formed integrally with the clamp or disposed thereon, in particular fixed; in a preferred embodiment it extends radially on the outside of the clamping collar and has a bore or other device in order to fix it and the clamping collar to the machine housing, wherein it is very particularly preferably fastened by screws to the machine housing, which is present anyway on the machine housing are, for example, with screws that hold a gear cover.
  • an at least partially circumferential securing groove is formed on the machine neck, which interacts with at least one Nuteingriffelement formed / arranged on the protective hood neck to form a captive securing the protective hood.
  • the Nuteingriffelement is therefore introduced when attaching the protective hood neck on the machine neck in the at least partially circumferential locking groove and thereby prevents the protective cover unintentionally detached from the machine neck and slips off.
  • the groove on a groove insertion in particular one which is substantially perpendicular to the groove, whereby the Nuteingriffelement when slipping the guard neck on the machine neck can be brought in the simplest way in the engagement of the groove.
  • the Nuteingriffelement is a cam or cam. Such are particularly easy to manufacture, which in a simple and inexpensive way training on the guard neck is possible.
  • FIG. 1 shows a protective cover 1 for a hand tool, not shown here, namely an angle grinder.
  • the protective cover 1 is configured in the manner of a pot section 2, with a protective cover bottom 3 and a protective cover edge 4.
  • the protective cover edge 4 is designed substantially as a ring section 5.
  • the one-sided adjoining this Guard floor 3 essentially describes a semicircle 6, wherein concentric with an imaginary center of the semicircle 6 a guard neck 7 is formed, which has a guard neck wall, which is substantially perpendicular to the guard base 3, and the guard neck 7 in turn semicircular around the imaginary center of the Semicircle 6 is formed.
  • the guard neck 7 is formed as a ring element 9.
  • the guard neck 7 has, distributed on its circumference 12, a sequence 13 of recesses 14 which are substantially equidistant, ie have the substantially same distance d between them. Starting from the imaginary center of the protective hood neck 7 (of the ring element 9) is determined by the sequence 13 of recesses 14, which have the distance d between each, a respective same angle (circle angle) ⁇ set.
  • FIG. 2 shows a machine neck 15 which is arranged on a Getriebeabdeckplatte 16, in particular integrally formed therewith.
  • the gear cover plate closes an angle gear 17 of a machine housing 18 of the power tool 19.
  • the machine neck 15 has a Maschinenhalswandung 20, in the outer peripheral side, a sequence of recesses 14 is introduced equally spaced.
  • the recesses 14 are formed as depressions 21, these consequently do not go through to a Maschinenhalsinnenseite 22 through.
  • the machine neck 15 assumes, not shown here, a tool spindle for receiving a tool which is to be covered by the protective hood, not shown here.
  • FIG. 3 shows the machine neck 15 and this encompassing guard neck neck 7 and this in turn encompassing clamping collar 23.
  • the clamping collar 23 has for coarse fixing or Siegfix ist a diameter-reducing clamping device 24; This is designed here in a simple manner as a screw tensioning device 25.
  • On the outer circumference of the clamp 23 is in bearing plates 26, a lever 27 with an end formed on this engaging element 28th rotatably mounted about a vertically disposed within the bearing plates 26 axis of rotation 29.
  • recesses 14 are arranged for cooperation, namely the engagement of the engagement element 28, which lie substantially at the same radii starting from an imaginary center of the machine neck 15 and thus include the same partial angle ⁇ .
  • the engagement element 28 can consequently penetrate the recesses 14, wherein the recesses 14 on the machine neck 15 as recesses 21, so not continuous, are formed, and thereby lock the guard neck 7 relative to the machine neck 15 and set.
  • By loosening, so excluding the engagement member 28 from the recesses 14 by operating an end portion 30 of the lever 27 of the guard neck 7 is rotatable within this arrangement, so that it is arranged at a different angular distance a relative to the other components and by releasing the lever 27 again can be locked.
  • the lever 27 is spring-loaded at its end portion 30, wherein a coil compression spring 31 is supported on a Hebelend Schemeunterseite 32 on the one hand and on an outer circumference 33 of the clamp on the other.
  • the lever 27 is by the spring force load of the coil spring 31 in a position such that the engagement element 28 engages through the recesses 14 in the recesses 21 and the guard neck is set relative to the other components.
  • the spring loading of the lever 27 may also be effected by other suitable spring designs, such as by gudgeon springs or the like.
  • the engagement element 28 forms in cooperation with the recesses 14 a rotation 34.
  • the anti-rotation 34 acts with the sequence 13 of recesses 14 as a rotating device 35, which can be adjusted by the sequence 13 predetermined angular positions of the protective cover 1 relative to the machine neck 15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

A hand-held power tool for a rotating tool has a machine housing with a machine neck, a guard for at least partially covering the tool and detachably attached to the machine neck and including a guard neck, a clamping cuff for detachably attaching the guard to the machine neck, and an engagement structure including an engagement element provided on the clamping cuff and at least one recess for engagement of the engagement element provided on the guard neck, or on the guard neck and the machine neck, to form a rotational lock that acts between the machine neck and guard, and the clamping cuff is a separate component attached to the machine housing.

Description

Die Erfindung betrifft eine Handwerkzeugmaschine nach Oberbegriff des Anspruchs 1.The invention relates to a hand tool according to the preamble of claim 1.

Stand der TechnikState of the art

Handwerkzeugmaschinen für rotierende, vorzugsweise scheibenförmige Werkzeuge sind bekannt. Sie kommen beispielsweise als Winkelschleifer vielfältig zum Einsatz. Bei solchen Handwerkzeugmaschinen sind Schutzhauben vorgesehen, die die Aufgabe haben, die beim Arbeiten mit der Handwerkzeugmaschine von dem rotierenden Werkzeug, beispielsweise Schleif- oder Trennscheiben, weggeschleuderten Funken und Materialpartikel vom Bediener beziehungsweise von Bereichen der Umgebung fernzuhalten. Ferner soll die Schutzhaube auch den Benutzer und die Umgebung im Falle einer Zerstörung des Werkzeugs schützen. Es kann beispielsweise vorkommen, dass eine Trennscheibe im Werkstück zerbirst, wenn sie dort in der Rotation verkantet wird. Hierbei muss durch die Schutzhaube sichergestellt sein, dass Fragmente der zerborstenen Trennscheibe, die mit teilweise hoher Energie weggeschleudert werden, nicht in den Bereich des Bedieners gelangen. Im Allgemeinen überdecken die Schutzhauben das Werkstück jedoch nur segmentweise, beispielsweise in einem Winkelbereich von etwa 180°, um dem Bediener ausreichende Arbeitsfreiheit am rotierenden Werkzeug und Werkstück zu lassen. Um die Schutzhauben in dem gewünschten Bereich verdrehen zu können, ist im Stand der Technik bekannt, die Schutzhaube lösbar zu befestigen, beispielsweise mittels eines an der Schutzhaube angeordneten Spannbandes. Hierzu sind Lösungen bekannt, bei denen das Spannband durch Lösen und Anziehen einer Klemmschraube im Umfang erweitert und verringert wird, so dass die Schutzhaube durch eine Klemmwirkung auf dem Maschinenhals festgehalten wird. Das Einstellen der Schutzhaube ist allerdings umständlich und erfordert Werkzeug, so dass häufig unter Umständen vom Bediener auf eine arbeitsgerechte Einstellung der Schutzhaube verzichtet wird, so dass die Positionierung der Schutzhaube auf dem Spannhals der Maschine nicht optimal ist. Aus der DE 102 59 520 A1 beispielsweise ist daher bekannt, an der Schutzhaube eine Spannsschelle auszubilden, die über einen Hebel (Spannhebel) im Umfang verstellbar ist, so dass die Schutzhaube durch eine einfache Hebebewegung aus der Arretierung gelöst und auf dem Spannhals verdrehbar gemacht werden kann. Zur Fixierung von Winkelgraden (bereichsweise Verschwenkung der Schutzhaube relativ zur Handwerkzeugmaschine) sind an dem Maschinenspannhals Vertiefungen ausgebildet, in die eine an dem Spannband beziehungsweise dem Spannhebel des Spannbandes angebrachte Sperrklinke eingreift. Hieran ist nachteilig, dass die Schutzhaube jeweils nur zu einer Art von Handwerkzeugmaschine passt, wobei die Sperrklinke an der Schutzhaube ausgebildet ist. Ferner ist die Kräfteaufnahme bei Zerbersten des Werkzeugs häufig nicht ausreichend.Hand tool machines for rotating, preferably disc-shaped tools are known. They are used, for example, as angle grinders variously. Protective hoods are provided in such hand tool machines which have the task of keeping the sparks and material particles being thrown away from the operator or from areas of the environment when working with the portable power tool by the rotating tool, for example grinding or cutting disks. Furthermore, the guard should also protect the user and the environment in the event of destruction of the tool. It may happen, for example, that a cutting disc breaks in the workpiece when it is tilted there in the rotation. It must be ensured by the protective hood that fragments of the crushed cutting disc, which are thrown away with high energy sometimes, not reach the area of the operator. In general, however, the protective covers cover the workpiece only in segments, for example in an angular range of about 180 °, to leave the operator sufficient freedom of work on the rotating tool and workpiece. In order to be able to rotate the protective covers in the desired area, it is known in the prior art to detachably secure the protective hood, for example by means of a tensioning band arranged on the protective hood. For this purpose, solutions are known in which the clamping band is expanded and reduced by loosening and tightening a clamping screw in the circumference, so that the protective hood is held by a clamping action on the machine neck. The adjustment of the guard is cumbersome and requires tools, so that in many cases the operator may not need to adjust the protective cover in accordance with the work, so that the positioning of the protective hood on the clamping neck of the machine is not optimal. From the DE 102 59 520 A1 For example, it is therefore known to form a clamp on the guard, which is adjustable by a lever (clamping lever) in the scope, so that the guard can be solved by a simple lifting movement of the lock and made rotatable on the clamping neck. For fixing of angular degrees (partially pivoting of the protective hood relative to the power tool) recesses are formed on the machine clamping neck, in which engages a mounted on the clamping band or the clamping lever of the clamping band pawl. This is disadvantageous in that the protective hood fits in each case only to one type of handheld power tool, wherein the pawl is formed on the protective hood. Furthermore, the force absorption is often insufficient when the tool bursts.

Aufgabe der Erfindung ist es, eine Weiterentwicklung vorzustellen, die einen höheren Schutz für den Bediener der Handwerkzeugmaschine bei größerem Komfort ermöglicht.The object of the invention is to present a development that allows greater protection for the operator of the power tool with greater comfort.

Offenbarung der ErfindungDisclosure of the invention

Hierzu wird eine Handwerkzeugmaschine vorgeschlagen für ein rotierendes, vorzugsweise scheibenförmiges Werkzeug, mit einem Maschinengehäuse, das einen Maschinenhals aufweist, an dem eine Schutzhaube zum zumindest teilweisen Abdecken des Werkzeugs lösbar befestigt ist, wobei die Schutzhaube einen Schutzhaubenhals aufweist und für die lösbare Befestigung eine Spannschelle vorgesehen ist, und wobei zur Ausbildung einer zwischen Maschinenhals und Schutzhaube wirkenden Verdrehsicherung an der Spannschelle ein Eingriffelement und an dem Schutzhaubenhals oder an dem Schutzhaubenhals und an dem Maschinenhals mindestens eine Ausnehmung zum Eingriff des Eingriffelements angeordnet/ausgebildet ist. Die Schutzhaube ist folglich ein zur Handwerkzeugmaschine separates Bauteil, wobei wiederum die Spannschelle ein separates Bauteil zur Schutzhaube ist. Die Schutzhaube weist einen Schutzhaubenhals auf, der an dem Maschinengehäuse befestigt wird, insbesondere über den am Maschinengehäuse ausgebildeten Maschinenhals gestülpt wird und von dort wieder gelöst werden kann, und die Spannschelle ihrerseits zur Befestigung des Schutzhaubenhalses dient. Die Spannschelle weist hierzu ein Eingriffelement auf, das mit mindestens einer Ausnehmung an dem Schutzhaubenhals oder aber an dem Schutzhaubenhals und an dem Maschinenhals zusammenwirken kann. Bei Eingriff dieses Eingriffelements in die Ausnehmung wird ein Verdrehen der Schutzhaube auf dem Maschinenhals verhindert, da das Eingriffelement den Schutzhaubenhals durchgreift, oder aber den Schutzhaubenhals durchgreift und in eine an dem Maschinenhals ausgebildete Ausnehmung ebenfalls eingreift, so dass der Schutzhaubenhals über dem Eingriff des Eingriffelements in die mindestens eine Ausnehmung arretiert wird.For this purpose, a hand tool machine is proposed for a rotating, preferably disc-shaped tool, with a machine housing having a machine neck to which a protective cover for at least partially covering the tool is releasably attached, wherein the protective hood has a guard neck and provided for releasably securing a clamp and wherein at least one recess for engagement of the engagement element is arranged / formed on the guard collar and on the guard neck and on the machine neck to form a rotation safeguard acting between the machine neck and the guard. The protective hood is consequently a component which is separate from the hand tool machine, with the clamping clamp in turn being a separate component for the protective hood. The guard has a guard neck which attaches to the machine housing is, in particular slipped over the engine neck formed on the machine housing and can be released from there again, and the clamp in turn serves to attach the protective hood neck. For this purpose, the tension clamp has an engagement element which can cooperate with at least one recess on the guard neck or on the guard neck and on the machine neck. Upon engagement of this engagement element in the recess, a rotation of the guard on the machine neck is prevented because the engagement element passes through the guard neck, or passes through the guard neck and also engages in a formed on the machine neck recess, so that the guard neck over the engagement of the engagement member in the at least one recess is locked.

In einer weiteren Ausführungsform ist die Spannschelle als separates Bauteil ausgebildet und an dem Maschinengehäuse befestigt. Die separate Ausbildung der Spannschelle und Befestigung am Maschinengehäuse befreit die Spannhaube von dem Spannmechanismus als solchem. Hierdurch wird die Spannhaube einerseits leichter handhabbar, andererseits gestattet diese Ausführung, die Spannschelle in einer bestimmten, definierten Art und Weise zu verwenden und etwa an dem Maschinengehäuse anzubringen, unabhängig von der Stellung der Schutzhaube relativ zum Maschinengehäuse.In a further embodiment, the clamp is formed as a separate component and fixed to the machine housing. The separate training of the clamp and attachment to the machine housing frees the clamping hood of the clamping mechanism as such. As a result, the clamping hood on the one hand easier to handle, on the other hand, this embodiment allows to use the clamp in a specific, defined manner and about to attach to the machine housing, regardless of the position of the protective hood relative to the machine housing.

In einer weiteren bevorzugten Ausführungsform wird der Schutzhaubenhals von der Spannschelle umgriffen. Die Spannschelle umgreift folglich den Schutzhaubenhals mehr oder weniger vollständig, je nach Ausführung der Spannschelle als geschlossener oder offener Ring, und bewirkt so die Festlegung der Schutzhaube über dem daran befestigten Schutzhaubenhals.In a further preferred embodiment, the guard neck is encompassed by the clamp. The clamp thus engages around the guard neck more or less completely, depending on the design of the clamp as a closed or open ring, and thus causes the determination of the guard over the attached guard neck.

In einer weiteren Ausführungsform ist vorgesehen, dass der Schutzhaubenhals den Maschinenhals umgreift oder teilweise umgreift. Abhängig von seiner Ausführungsform umfasst seinerseits der Schutzhaubenhals den Maschinenhals folglich vollständig oder zumindest bereichsweise. Dies erlaubt weitgehende Freiheit in der Art und Weise, wie die Schutzhaube relativ zum Maschinengehäuse angeordnet werden soll, insbesondere in der Ausführungsform der teilweisen Umgreifung.In a further embodiment it is provided that the protective neck surrounds or partially engages around the machine neck. Depending on its embodiment, in turn, the protective neck neck thus comprises the machine neck completely or at least partially. This allows extensive freedom in the manner in which the protective hood is to be arranged relative to the machine housing, in particular in the embodiment of partial encasement.

In einer bevorzugten Ausführungsform ist vorgesehen, dass der Maschinenhals und/oder der Schutzhaubenhals ein Ausgleichselement, insbesondere einen aus elastischem Material, insbesondere Gummi, bestehenden Ring, besitzt, um Toleranzen zwischen Schutzhaubenhals und Maschinenhals auszugleichen. Mittels dieses Ausgleichselements ist es möglich, allfällige Toleranzen zwischen Maschinenhals und/oder Schutzhaubenhals und/oder Spannschelle zu kompensieren, insbesondere zu verhindern, dass die Teile ohne ausreichenden Flächenkontakt zueinander stehen.In a preferred embodiment it is provided that the machine neck and / or the guard neck has a compensating element, in particular a ring consisting of elastic material, in particular rubber, in order to compensate for tolerances between the guard neck and the machine neck. By means of this compensating element, it is possible to compensate for any tolerances between the machine neck and / or guard neck and / or clamp, in particular to prevent the parts are without sufficient surface contact each other.

In einer weiteren Ausführungsform ist der Schutzhaubenhals als Ringelement oder als Ringsegment-Element ausgebildet. Bei der Ausführung als Ringelement ist der Schutzhaubenhals ringförmig an der Schutzhaube angeordnet, insbesondere konzentrisch zu deren Außenumfang des Kreissegmentes, das von der Schutzhaube überdeckt wird. In der Ausführung als Ringsegment-Element ist der Schutzhaubenhals nur partiell ausgebildet, also nicht als Vollring, bevorzugt in einer solchen Art und Weise, dass er im Winkelbereich den Bereich umfasst, der auch von der Schutzhaube selbst überstrichen wird. Hierdurch ergibt sich eine besonders große Freiheit in Anordnung und Festlegung der Schutzhaube relativ zum Maschinengehäuse.In a further embodiment, the guard neck is designed as a ring element or as a ring segment element. In the embodiment as a ring element of the guard neck is arranged annularly on the protective hood, in particular concentric with the outer circumference of the circular segment, which is covered by the protective hood. In the embodiment as a ring segment element of the guard neck is only partially formed, so not as a solid ring, preferably in such a way that it covers the range in the angular range, which is also covered by the guard itself. This results in a particularly large freedom in arrangement and determination of the protective hood relative to the machine housing.

In einer anderen Ausführungsform ist vorgesehen, dass die Spannschelle eine ihren Durchmesser beim Spannen verkleinernde Spanneinrichtung aufweist. Diese Spanneinrichtung kann beispielsweise durch eine Schraube mit entsprechendem Gegengewinde ausgestaltet sein, wobei die Spannschelle ihrerseits als offener Ring ausgebildet ist, der durch die Spanneinrichtung verschlossen wird.In another embodiment, it is provided that the clamping collar has a clamping device which reduces its diameter during clamping. This clamping device can be configured for example by a screw with a corresponding mating thread, wherein the clamp is in turn designed as an open ring, which is closed by the clamping device.

In einer weiteren Ausführungsform ist vorgesehen, dass die Spannschelle ein Eingriffelement und eine Spanneinrichtung aufweist. Eingriffelement und Eingriffseinrichtung sind demzufolge verschieden. Das Eingriffelement dient der Fixierung der Schutzhaube auf dem Maschinenhals gegen Axialverdrehung, wohingegen die Spanneinrichtung eine Fixierung in jeglicher Hinsicht, insbesondere gegen Abgleiten vom Maschinenhals bewirkt.In a further embodiment it is provided that the clamp has an engagement element and a clamping device. Engagement element and engaging means are therefore different. The engagement element is used to fix the guard on the machine neck against axial rotation, whereas the clamping device causes a fixation in any respect, especially against slipping from the machine neck.

In einer weiteren Ausführungsform ist vorgesehen, dass die Spanneinrichtung als ein das Eingriffelement aufweisender Hebel ausgebildet ist. Die Umfangsvergrößerung und -verkleinerung der Spannschelle erfolgt folglich über einen aus dem Stand der Technik bereits bekannten Hebel, der die als offenen Ring ausgebildete Spannschelle öffnet beziehungsweise schließt, wobei aber der Hebel das Eingriffelement aufweist, das Eingriffelement insbesondere an dem Hebel etwa unterseitig ausgebildet oder an diesem angeordnet ist.In a further embodiment it is provided that the clamping device is designed as a lever having the engagement element. The circumferential enlargement and reduction of the clamp is thus carried out via a lever known from the prior art, which opens or closes the clamp designed as an open ring, but wherein the lever has the engagement element, the engagement element, in particular on the lever formed on the underside or on this is arranged.

In einer bevorzugten Ausführungsform ist der Hebel zur Fixierung der Eingriffstellung des Eingriffelements federbelastet. Das an dem Hebel angeordnete Eingriffelement ist folglich stets im Eingriff in der mindestens einen Ausnehmung, es sei denn, der Hebel wird entgegen seiner Federbelastung geöffnet. Auf diese Weise ist ein unabsichtliches Verstellen oder Abnehmen der Schutzhaube nicht möglich, da dezidiert entgegen der Federbelastung vorgegangen werden muss, wobei beispielsweise, aber nicht zwingend, gleichzeitig auch die Spanneinrichtung geöffnet werden kann.In a preferred embodiment, the lever for fixing the engagement position of the engagement element is spring-loaded. The arranged on the lever engaging element is therefore always engaged in the at least one recess, unless the lever is opened against its spring load. In this way, an unintentional adjustment or removal of the protective hood is not possible because it must be decidedly counteracted against the spring load, for example, but not necessarily, at the same time, the clamping device can be opened.

In einer weiteren Ausführungsform ist das Eingriffelement an einem Eingriffshebel angeordnet, und die Spanneinrichtung über einen Spannhebel betätigbar. Abweichend von der vorstehend beschriebenen Ausführungsform weist das Eingriffelement folglich einen separaten Eingriffshebel auf, der ausschließlich das Eingriffelement betätigt, ohne gleichzeitig die Spanneinrichtung zu betätigen oder diese darzustellen. Die Spanneinrichtung wird hierbei in anderer Weise betätigt, beispielsweise über einen Spannhebel.In a further embodiment, the engagement element is arranged on an engagement lever, and the tensioning device can be actuated via a tensioning lever. Notwithstanding the embodiment described above, the engagement element consequently has a separate engagement lever which operates exclusively the engagement element, without simultaneously actuating or displaying the tensioning device. The clamping device is in this case actuated in another way, for example via a clamping lever.

In einer weiteren Ausführungsform ist das Eingriffelement eine Schraube. Diese Ausführungsform empfiehlt sich insbesondere für Ausführungen, bei welchen die Schutzhaube mit einem Werkzeug verstellt werden soll und/oder bei denen eine häufige Verstellung der Schutzhaube relativ zum Maschinengehäuse nicht erforderlich ist, so dass auch die Ausführung mit einem hebelbetätigten Eingriffelement nicht erforderlich ist.In a further embodiment, the engagement element is a screw. This embodiment is particularly recommended for embodiments in which the protective hood is to be adjusted with a tool and / or where frequent adjustment of the guard relative to the machine housing is not required, so that the execution with a lever-operated engagement element is not required.

In einer weiteren, ganz besonders bevorzugten Ausführungsform ist die Verdrehsicherung mittels des Eingriffelements und mittels einer an dem Schutzhaubenhals oder an dem Schutzhaubenhals und dem Maschinenhals angeordneten Folge von Ausnehmungen als einstellbare Verdrehvorrichtung der Schutzhaube relativ zum Maschinenhals ausgebildet. Durch die Ausbildung einer Folge von Ausnehmungen, in die wahlweise und/oder sequenziell das Eingriffelement eingreifen kann, lässt sich eine Verdrehvorrichtung der Schutzhaube relativ zum Maschinenhals und damit zum Maschinengehäuse ausbilden, dabei in jeder Stellung, wie sie durch die Folge von Ausnehmungen vorgegeben ist. die Schutzhaube durch einfache Eingreifenlassen des Eingriffelements in die jeweilige Ausnehmung festgelegt werden kann.In a further, very particularly preferred embodiment, the anti-rotation device is provided by means of the engagement element and by means of a on the guard neck or on the guard neck and the machine neck arranged sequence of recesses designed as adjustable twisting the guard relative to the machine neck. By forming a series of recesses into which the engagement element can selectively and / or sequentially engage, a twisting device of the protective cover can be formed relative to the machine neck and thus to the machine housing, in any position as dictated by the sequence of recesses. the protective hood can be fixed by simple engagement of the engagement element in the respective recess.

In einer weiteren Ausführungsform ist vorgesehen, dass die Spannschelle mindestens einen Befestigungslappen aufweist, der vorzugsweise radial verläuft und der Befestigung an dem Maschinengehäuse dient. Ein solcher Befestigungslappen kann einstückig mit der Spannschelle ausgebildet oder an dieser angeordnet, insbesondere befestigt sein; in einer bevorzugten Ausführungsform verläuft er radial der Spannschelle außenseitig und weist eine Bohrung oder sonstige Vorrichtung auf, um ihn und über ihn die Spannschelle an dem Maschinengehäuse zu befestigen, wobei er ganz besonders bevorzugt mittels Schrauben an dem Maschinengehäuse befestigt wird, die am Maschinengehäuse ohnehin vorhanden sind, beispielsweise mit Schrauben, die eine Getriebeabdeckung halten.In a further embodiment, it is provided that the clamping clamp has at least one fastening tab, which preferably extends radially and serves for fastening to the machine housing. Such a fastening tab may be formed integrally with the clamp or disposed thereon, in particular fixed; in a preferred embodiment it extends radially on the outside of the clamping collar and has a bore or other device in order to fix it and the clamping collar to the machine housing, wherein it is very particularly preferably fastened by screws to the machine housing, which is present anyway on the machine housing are, for example, with screws that hold a gear cover.

In einer weiteren, besonders bevorzugten Ausführungsform ist am Maschinenhals eine zumindest bereichsweise umlaufende Sicherungsnut ausgebildet, die mit mindestens einem an dem Schutzhaubenhals ausgebildeten/angeordneten Nuteingriffelement zur Ausbildung einer Verliersicherung der Schutzhaube zusammenwirkt. Das Nuteingriffelement wird demzufolge beim Befestigen des Schutzhaubenhalses auf dem Maschinenhals in die mindestens bereichsweise umlaufende Sicherungsnut eingebracht und verhindert hierdurch, dass sich die Schutzhaube unbeabsichtigt vom Maschinenhals löst und abrutscht.In a further, particularly preferred embodiment, an at least partially circumferential securing groove is formed on the machine neck, which interacts with at least one Nuteingriffelement formed / arranged on the protective hood neck to form a captive securing the protective hood. The Nuteingriffelement is therefore introduced when attaching the protective hood neck on the machine neck in the at least partially circumferential locking groove and thereby prevents the protective cover unintentionally detached from the machine neck and slips off.

In einer weiteren bevorzugten Ausführungsform weist die Nut eine Nuteinführung auf, insbesondere eine solche, die im Wesentlichen senkrecht zur Nut steht, wodurch das Nuteingriffelement beim Überstülpen des Schutzhaubenhalses auf dem Maschinenhals auf einfachste Weise in den Eingriff der Nut gebracht werden kann.In a further preferred embodiment, the groove on a groove insertion, in particular one which is substantially perpendicular to the groove, whereby the Nuteingriffelement when slipping the guard neck on the machine neck can be brought in the simplest way in the engagement of the groove.

In einer weiteren bevorzugten Ausführungsform ist das Nuteingriffelement eine Nocke oder weist Nocken auf. Solche sind besonders einfach herzustellen, wodurch auf einfache und preiswerte Art eine Ausbildung an dem Schutzhaubenhals möglich ist.In a further preferred embodiment, the Nuteingriffelement is a cam or cam. Such are particularly easy to manufacture, which in a simple and inexpensive way training on the guard neck is possible.

Weitere vorteilhafte Ausführungsformen ergeben sich aus den Unteransprüchen und aus Kombinationen derselben.Further advantageous embodiments will become apparent from the dependent claims and combinations thereof.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert.The invention will be explained in more detail with reference to drawings.

Es zeigen

Figur 1
eine Schutzhaube mit einem eine Folge von Ausnehmungen aufweisenden Schutzhaubenhals;
Figur 2
einen Getriebedeckel mit einem hieran ausgebildeten Maschinenhals, der eine entsprechende Folge von Ausnehmungen aufweist und
Figur 3
eine Querschnitts-Aufsicht auf einen im Montagezustand befindlichen Maschinenhals, umgriffen von einem Schutzhaubenhals und einer Spannschelle.
Show it
FIG. 1
a protective hood with a protective neck having a series of recesses;
FIG. 2
a gear cover with a machine neck formed thereon, which has a corresponding sequence of recesses and
FIG. 3
a cross-sectional plan view of a machine neck in the assembled state, embraced by a guard neck and a clamp.

Ausführungsform(en) der ErfindungEmbodiment (s) of the invention

Figur 1 zeigt eine Schutzhaube 1 für eine hier nicht dargestellte Handwerkzeugmaschine, nämlich einen Winkelschleifer. Die Schutzhaube 1 ist in der Art eines Topfabschnittes 2 ausgestaltet, mit einem Schutzhaubenboden 3 und einem Schutzhaubenrand 4. Der Schutzhaubenrand 4 ist im Wesentlichen als Ringabschnitt 5 ausgebildet. Der hieran einseitig anschließende Schutzhaubenboden 3 beschreibt im Wesentlichen einen Halbkreis 6, wobei konzentrisch zu einem gedachten Mittelpunkt des Halbkreises 6 ein Schutzhaubenhals 7 ausgebildet ist, der eine Schutzhaubenhalswandung aufweist, die im Wesentlichen senkrecht auf dem Schutzhaubenboden 3 steht, und der Schutzhaubenhals 7 seinerseits halbkreisförmig um das gedachte Zentrum des Halbkreises 6 ausgebildet ist. Der Schutzhaubenhals 7 ist als ein Ringelement 9 ausgebildet. Zwischen dem Schutzhaubenboden 3 und dem Schutzhaubenhals 7 ist zur Erhöhung der Steifigkeit und Festigkeit eine Materialverstärkung 10 beziehungsweise eine Kröpfung 11 ausgebildet. Der Schutzhaubenhals 7 weist, verteilt auf seinen Umfang 12 eine Folge 13 von Ausnehmungen 14 auf, die im Wesentlichen gleich beabstandet sind, also untereinander den im Wesentlichen gleichen Abstand d aufweisen. Ausgehend vom gedachten Zentrum des Schutzhaubenhalses 7 (des Ringelements 9) wird durch die Folge 13 von Ausnehmungen 14, die untereinander den Abstand d aufweisen, ein jeweils gleicher Winkel (Kreiswinkel) α festgelegt. FIG. 1 shows a protective cover 1 for a hand tool, not shown here, namely an angle grinder. The protective cover 1 is configured in the manner of a pot section 2, with a protective cover bottom 3 and a protective cover edge 4. The protective cover edge 4 is designed substantially as a ring section 5. The one-sided adjoining this Guard floor 3 essentially describes a semicircle 6, wherein concentric with an imaginary center of the semicircle 6 a guard neck 7 is formed, which has a guard neck wall, which is substantially perpendicular to the guard base 3, and the guard neck 7 in turn semicircular around the imaginary center of the Semicircle 6 is formed. The guard neck 7 is formed as a ring element 9. Between the protective hood bottom 3 and the protective hood neck 7, a material reinforcement 10 or a crank 11 is formed to increase the rigidity and strength. The guard neck 7 has, distributed on its circumference 12, a sequence 13 of recesses 14 which are substantially equidistant, ie have the substantially same distance d between them. Starting from the imaginary center of the protective hood neck 7 (of the ring element 9) is determined by the sequence 13 of recesses 14, which have the distance d between each, a respective same angle (circle angle) α set.

Figur 2 zeigt einen Maschinenhals 15, der auf einer Getriebeabdeckplatte 16 angeordnet, insbesondere einstückig zu dieser ausgebildet ist. Die Getriebeabdeckplatte verschließt ein Winkelgetriebe 17 eines Maschinengehäuses 18 der Handwerkzeugmaschine 19. Der Maschinenhals 15 weist eine Maschinenhalswandung 20 auf, in die außenumfangsseitig eine Abfolge von Ausnehmungen 14 gleich beabstandet eingebracht ist. Die Ausnehmungen 14 sind als Vertiefungen 21 ausgebildet, diese gehen folglich nicht bis auf eine Maschinenhalsinnenseite 22 durch. Der Maschinenhals 15 nimmt, hier nicht dargestellt, eine Werkzeugspindel zur Aufnahme eines Werkzeugs auf, das von der hier nicht dargestellten Schutzhaube überdeckt werden soll. FIG. 2 shows a machine neck 15 which is arranged on a Getriebeabdeckplatte 16, in particular integrally formed therewith. The gear cover plate closes an angle gear 17 of a machine housing 18 of the power tool 19. The machine neck 15 has a Maschinenhalswandung 20, in the outer peripheral side, a sequence of recesses 14 is introduced equally spaced. The recesses 14 are formed as depressions 21, these consequently do not go through to a Maschinenhalsinnenseite 22 through. The machine neck 15 assumes, not shown here, a tool spindle for receiving a tool which is to be covered by the protective hood, not shown here.

Figur 3 zeigt den Maschinenhals 15 sowie den diesen umgreifenden Schutzhaubenhals 7 und eine diesen wiederum umgreifende Spannschelle 23. Die Spannschelle 23 weist zur Grobfestlegung beziehungsweise Erstfixierung eine ihren Durchmesser verkleinernde Spanneinrichtung 24 auf; diese ist hier in einfacher Weise als Schraubenspannvorrichtung 25 ausgebildet. Außenumfangsseitig auf der Spannschelle 23 ist in Lagerlaschen 26 ein Hebel 27 mit einem an diesem endseitig ausgebildeten Eingriffelement 28 drehbeweglich um eine senkrecht innerhalb der Lagerlaschen 26 angeordneten Drehachse 29 gelagert. An dem Maschinenhals 15 sowie korrespondierend hierzu an dem Schutzhaubenhals 7 sind zum Zusammenwirken, nämlich dem Eingriff des Eingriffelements 28, Ausnehmungen 14 angeordnet, die im Wesentlichen auf gleichen Radien ausgehend von einem gedachten Zentrum des Maschinenhalses 15 liegen und somit gleiche Teilwinkel α einschließen. Das Eingriffelement 28 kann demzufolge die Ausnehmungen 14 durchdringen, wobei die Ausnehmungen 14 an dem Maschinenhals 15 als Vertiefungen 21, also nicht durchgehend, ausgebildet sind, und hierdurch den Schutzhaubenhals 7 relativ zum Maschinenhals 15 arretieren und festlegen. Durch Lösen, also Ausnehmen des Eingriffelements 28 aus den Ausnehmungen 14 durch Betätigen eines Endbereichs 30 des Hebels 27 wird der Schutzhaubenhals 7 innerhalb dieser Anordnung drehbeweglich, so dass er in einem anderen Winkelabstand a relativ zu den übrigen Komponenten angeordnet und durch Loslassen des Hebels 27 wieder arretiert werden kann. Damit das Lösen des Hebels 27 und damit des Eingriffelements 28 aus den Ausnehmungen 14 nicht unabsichtlich erfolgt, ist der Hebel 27 an seinem Endbereich 30 federbelastet, wobei eine Spiraldruckfeder 31 sich an einer Hebelsendbereichsunterseite 32 einerseits und auf einem Außenumfang 33 der Spannschelle andererseits abstützt. Im Ruhezustand ist demzufolge der Hebel 27 durch die Federkraftbelastung der Spiraldruckfeder 31 in einer solchen Position, dass das Eingriffelement 28 durch die Ausnehmungen 14 in die Vertiefungen 21 eingreift und der Schutzhaubenhals relativ zu den übrigen Komponenten festgelegt ist. Die Federbelastung des Hebels 27 kann selbstverständlich auch durch andere geeignete Federkonstruktionen, etwa durch Schenkeldruckfedern oder Ähnliches, bewirkt werden. Das Eingriffelement 28 bildet im Zusammenwirken mit den Ausnehmungen 14 eine Verdrehsicherung 34 aus. Die Verdrehsicherung 34 wirkt mit der Folge 13 von Ausnehmungen 14 als Verdrehvorrichtung 35, wobei sich durch die Folge 13 vorgegebene Winkelpositionen der Schutzhaube 1 relativ zum Maschinenhals 15 einstellen lassen. FIG. 3 shows the machine neck 15 and this encompassing guard neck neck 7 and this in turn encompassing clamping collar 23. The clamping collar 23 has for coarse fixing or Erstfixierung a diameter-reducing clamping device 24; This is designed here in a simple manner as a screw tensioning device 25. On the outer circumference of the clamp 23 is in bearing plates 26, a lever 27 with an end formed on this engaging element 28th rotatably mounted about a vertically disposed within the bearing plates 26 axis of rotation 29. On the machine neck 15 and corresponding thereto on the protective hood neck 7, recesses 14 are arranged for cooperation, namely the engagement of the engagement element 28, which lie substantially at the same radii starting from an imaginary center of the machine neck 15 and thus include the same partial angle α. The engagement element 28 can consequently penetrate the recesses 14, wherein the recesses 14 on the machine neck 15 as recesses 21, so not continuous, are formed, and thereby lock the guard neck 7 relative to the machine neck 15 and set. By loosening, so excluding the engagement member 28 from the recesses 14 by operating an end portion 30 of the lever 27 of the guard neck 7 is rotatable within this arrangement, so that it is arranged at a different angular distance a relative to the other components and by releasing the lever 27 again can be locked. Thus, the release of the lever 27 and thus the engagement member 28 from the recesses 14 is not unintentional, the lever 27 is spring-loaded at its end portion 30, wherein a coil compression spring 31 is supported on a Hebelendbereichunterseite 32 on the one hand and on an outer circumference 33 of the clamp on the other. At rest, therefore, the lever 27 is by the spring force load of the coil spring 31 in a position such that the engagement element 28 engages through the recesses 14 in the recesses 21 and the guard neck is set relative to the other components. Of course, the spring loading of the lever 27 may also be effected by other suitable spring designs, such as by gudgeon springs or the like. The engagement element 28 forms in cooperation with the recesses 14 a rotation 34. The anti-rotation 34 acts with the sequence 13 of recesses 14 as a rotating device 35, which can be adjusted by the sequence 13 predetermined angular positions of the protective cover 1 relative to the machine neck 15.

Claims (17)

  1. Portable power tool (19) for a rotating, preferably disc-shaped, tool, comprising a machine housing (18) which has a machine neck (15), to which a protective hood (1) for at least partly covering the tool is detachably fastened, wherein the protective hood (1) has a protective hood neck (7) and is provided for the detachable fastening of a clamp (23), and wherein the clamp (23) has an engagement element (28) for forming an anti-rotation lock (34) acting between machine neck (15) and protective hood (1), characterized in that at least one aperture (14) for the engagement of the engagement element (28) is arranged or formed on the protective hood neck (7) or on the protective hood neck (7) and on the machine neck (15).
  2. Portable power tool according to Claim 1, characterized in that the clamp (23) is designed as a separate component and is fastened to the machine housing (18).
  3. Portable power tool according to either of the preceding claims, characterized in that the protective hood neck (7) is enclosed by the clamp (23).
  4. Portable power tool according to one of the preceding claims, characterized in that the protective hood neck (7) encloses or partly encloses the machine neck (15).
  5. Portable power tool according to one of the preceding claims, characterized in that the machine neck (15) and/or the protective hood neck (7) have/has a compensating element, in particular a ring made of elastic material, in particular rubber, in order to compensate for tolerances between protective hood neck (7) and machine neck (15).
  6. Portable power tool according to one of the preceding claims, characterized in that the protective hood neck (7) is designed as a ring element (9) or as a ring segment element.
  7. Portable power tool according to one of the preceding claims, characterized in that the clamp (23) has a clamping device (24) decreasing the diameter thereof during the clamping.
  8. Portable power tool according to one of the preceding claims, characterized in that the clamp (23) has an engagement element (28) and a clamping device (24).
  9. Portable power tool according to one of the preceding claims, characterized in that the clamping device (24) is designed as a lever (27) having the engagement element (28).
  10. Portable power tool according to Claim 9, characterized in that the lever (27) is spring-loaded for fixing the engagement position of the engagement element (28).
  11. Portable power tool according to one of the preceding claims, characterized in that the engagement element (28) is arranged on an engagement lever, and the clamping device (24) can be actuated via a clamping lever.
  12. Portable power tool according to one of the preceding claims, characterized in that the engagement element (28) is a screw (25).
  13. Portable power tool according to one of the preceding claims, characterized in that the anti-rotation lock (34) is designed as an adjustable rotary device (35) of the protective hood (1) relative to the machine neck (15) by means of the engagement element (28) and by means of a sequence (13) of apertures (14) arranged on the protective hood neck (7) or on the protective hood neck (7) and the machine neck (15).
  14. Portable power tool according to one of the preceding claims, characterized in that the clamp (23) has at least one fastening tab which preferably runs radially and serves for the fastening to the machine housing (18).
  15. Portable power tool according to one of the preceding claims, characterized in that a locking groove which extends around at least part of the circumference is formed on the machine neck (15), said locking groove interacting with at least one groove engagement element, formed/arranged on the protective hood neck (7), for forming a means of captively locking the protective hood (1).
  16. Portable power tool according to Claim 15, characterized in that the groove has a groove entry guide.
  17. Portable power tool according to Claim 15 or 16, characterized in that the groove engagement element is a lug or has lugs.
EP07803583A 2006-11-13 2007-09-21 Portable power tool for a rotating tool comprising a protective hood Active EP2097220B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006053303A DE102006053303A1 (en) 2006-11-13 2006-11-13 Hand tool for a rotating tool with protective cover
PCT/EP2007/060046 WO2008058797A1 (en) 2006-11-13 2007-09-21 Portable power tool for a rotating tool comprising a protective hood

Publications (2)

Publication Number Publication Date
EP2097220A1 EP2097220A1 (en) 2009-09-09
EP2097220B1 true EP2097220B1 (en) 2010-06-23

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EP07803583A Active EP2097220B1 (en) 2006-11-13 2007-09-21 Portable power tool for a rotating tool comprising a protective hood

Country Status (7)

Country Link
US (1) US7892075B2 (en)
EP (1) EP2097220B1 (en)
CN (1) CN101535001B (en)
AT (1) ATE471788T1 (en)
BR (1) BRPI0718535A2 (en)
DE (2) DE102006053303A1 (en)
WO (1) WO2008058797A1 (en)

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BRPI0718535A2 (en) 2013-11-19
ATE471788T1 (en) 2010-07-15
CN101535001B (en) 2011-04-13
DE502007004221D1 (en) 2010-08-05
DE102006053303A1 (en) 2008-05-15
EP2097220A1 (en) 2009-09-09
US7892075B2 (en) 2011-02-22
WO2008058797A1 (en) 2008-05-22
US20090209184A1 (en) 2009-08-20
CN101535001A (en) 2009-09-16

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