EP1968768B1 - Protective hood for a portable tool - Google Patents

Protective hood for a portable tool Download PDF

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Publication number
EP1968768B1
EP1968768B1 EP06819319A EP06819319A EP1968768B1 EP 1968768 B1 EP1968768 B1 EP 1968768B1 EP 06819319 A EP06819319 A EP 06819319A EP 06819319 A EP06819319 A EP 06819319A EP 1968768 B1 EP1968768 B1 EP 1968768B1
Authority
EP
European Patent Office
Prior art keywords
protective hood
wall
collar
tool
rotary tool
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
EP06819319A
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German (de)
French (fr)
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EP1968768A1 (en
Inventor
Justus Lamprecht
Joachim Schadow
Sinisa Andrasic
Cornelius Boeck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP1968768A1 publication Critical patent/EP1968768A1/en
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Publication of EP1968768B1 publication Critical patent/EP1968768B1/en
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • B27G19/04—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws

Definitions

  • the invention relates to a protective cover for a tool according to the preamble of claim 1.
  • the invention further relates to a tool with such a protective cover.
  • Hand tools with rotary tools are used universally and in the most diverse areas. Through a variety of rotary tools, this type of tools can be used for a variety of purposes and is very popular because of its performance. Especially when used with disc-shaped rotary tools such tools must be provided with protective hoods. These not only keep sparks and worn material particles away from the operator, but also prevent high-speed ejected parts of a broken rotary tool from reaching and injuring the operator's area.
  • Such protective hoods are known. They have a covering area to the rotating tool, and release the rotary tool in another area, so that it can be applied there to the workpiece to be machined.
  • These protective hoods are to be able to fulfill their task of protecting the operator and the surrounding areas effectively and to provide adequate protection especially against bursting rotary tools offer, which release a high energy, made of strong, mostly tough and strong-walled material. As a rule, they consist of a strong sheet metal part.
  • the DE 295 08 950 U1 shows a protective cover for a hand tool with a rotary tool.
  • An outer peripheral side of a collar bounded axial wall of the protective cover serves to partially cover the rotary tool and has a plurality of finger-like, radially extending forms, which taper in the direction of the radially outer edge of the protective hood.
  • the invention offers the advantage that the wall areas - starting from an inner peripheral side collar - extend to the collar and have radially extending abutment surfaces for the formation of stiffening steps.
  • This embodiment results in a comparatively high strength, even at a lower material thickness, so that material and weight are saved.
  • the wall regions have radially extending abutment surfaces.
  • the said wall regions adjoin one another such that these impact regions extend in each case over a radius relating to the outer circumference of the protective hood.
  • the invention provides that the abutting surfaces are formed as steps.
  • a stepwise design of the abutment surfaces between the individual wall regions results in a special material rigidity with the same material expenditure or, with at least the same rigidity, a lower material expenditure and thus a cost and weight saving.
  • shock zones lead to material particles or Even parts of ruptured rotary tools are braked in their trajectory within the protective cover and deflected, so that a breakthrough of the guard is not possible due to the already previously occurring strong energy loss.
  • the invention provides that the steps form stiffening stages.
  • the steps form stiffening stages.
  • the wall areas are surface and / or geometry identical. Equal area means that the individual wall areas have essentially the same area; The same geometry means that the wall areas have similar angles.
  • the collar is preferably integrally adjacent to the axial wall.
  • the axial wall is formed in an axial direction at a substantially 90 ° angle, wherein preferably axial wall and collar consist of one piece.
  • the collar has a lateral surface which extends at the same coaxial distance to the axis of rotation of the rotary tool.
  • the axially offset embodiment of the wall portion of the axial wall in the collar does not continue or not substantially further, but that the lateral surface is formed substantially smooth surface. In conjunction with the axially offset design of the individual wall areas, this results in an even better stiffening of the protective hood.
  • the protective hood has a rotary tool release area, which forms at least along a portion as a carding edge is.
  • a rotary tool release area which forms at least along a portion as a carding edge is.
  • the protective hood has a clamping device for its removable attachment to the tool. With such a clamping device, the detachable attachment of the guard on the tools is possible.
  • the invention further comprises a hand tool with a protective hood according to one or more of the preceding claims.
  • Hand tools with a protective hood according to the invention are weight-saving due to the mentioned design advantages and versatile in use and more flexible, thereby also saving energy for the operator.
  • FIG. 1 shows a protective hood 1 for a hand tool, not shown.
  • This has, essentially on one side of a clamping ring 2 outgoing, an axial wall 3.
  • This extends substantially in the radial direction R of the clamping ring outgoing, and in this case forms wall portions 4, which are arranged axially offset from one another.
  • Between the individual wall regions 4 are impact zones 5, which are formed as steps 6.
  • the wall portions 4 are - seen in the axial direction - alternately increased and arranged Highwayphosphon, and in this case integrally connected to each other via the formed as a step 6 shock zones 5.
  • each wall portion 4 is bounded by a collar 8 attached to the clamping ring 2 on the inner circumference side and by a collar 9 on the outer peripheral side.
  • the wall regions 4 located in a first end region 10 and in a second end region 11 of the axial wall 3 are designed such that they provide a shock zone 5, designed as a step 6, for the respective adjacent inner wall region 4, designed as a ring segment 7, for the first end region or for the second end region however, have a carding edge 12.
  • the carding edge 12 is integral with the axial wall 3.
  • the wall regions 4 located at the first end region 10 or at the second end region 11 are not ring-segment-shaped, but such that they adjoin the outer circumference of the clamping ring on the inner peripheral side, wherein the first end point 13 and the second end point 14 the first end portion 10 and the second end portion 11 cross-connected by the central axis 15 of the clamping ring 2 results in a 180 ° -shaped overlap of a rotary tool, not shown, therefore, limited by an imaginary cross connection between the first end portion 10 and the second end portion 11 through the central axis 15 with a lateral surface 16 of the collar 9,
  • FIG. 2 shows a partial perspective of the protective hood 1 with the second end portion 11 and the peripheral there arranged carding edge 12.
  • the individual wall portions 4, in particular the ring segments 7, extend in an angular range 17 in such a manner in the lateral surface 16 of the collar 9, that they have a same coaxial distance to Have rotational axis of the rotary tool, not shown, thus their above-described axial offset ends in the angular range 17 and does not continue in the lateral surface 16. This in turn contributes to a significant stiffening of the construction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Sawing (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The invention relates to a protective hood for a portable tool with a rotary tool, having an axial wall for covering regions of the rotary tool. It is proposed that the axial wall (3) have wall regions (4) which are axially offset from one another and are connected to one another, in particular in one piece. Furthermore, a portable tool is proposed which has such a protective hood (1).

Description

Die Erfindung betrifft eine Schutzhaube für ein Handwerkszeug nach Oberbegriff des Anspruchs 1. Die Erfindung betrifft ferner ein Handwerkszeug mit einer solchen Schutzhaube.The invention relates to a protective cover for a tool according to the preamble of claim 1. The invention further relates to a tool with such a protective cover.

Stand der TechnikState of the art

Handwerkszeuge mit Rotationswerkzeugen, beispielsweise Winkelschleifer, werden universell und in den vielfältigsten Bereichen eingesetzt. Durch eine Vielzahl an Rotationswerkzeugen kann diese Art Handwerkszeug für vielfältige Zwecke eingesetzt werden und ist aufgrund seiner Leistungsfähigkeit sehr beliebt. Insbesondere bei Verwendung mit scheibenförmigen Rotationswerkzeugen müssen solche Handwerkszeuge mit Schutzhauben versehen sein. Diese halten nicht nur Funken und abgetragene Materialpartikel vom Bediener fern, sondern verhindern auch, dass mit hoher Geschwindigkeit weggeschleuderte Teile eines zerborstenen Rotationswerkzeuges in den Bereich des Bedieners gelangt und diesen verletzt. Solche Schutzhauben sind bekannt. Sie weisen einen Überdeckungsbereich zum rotierenden Werkzeug auf, und geben das Rotationswerkzeug in einem anderen Bereich frei, so dass es dort an das zu bearbeitende Werkstück angelegt werden kann. Diese Schutzhauben werden, um ihre Aufgabe des Schutzes des Bedieners und der diesen umgebenden Bereiche wirksam erfüllen zu können und um einen ausreichenden Schutz insbesondere vor berstenden Rotationswerkzeugen zu bieten, die eine hohe Energie freisetzen, aus kräftigem, meist zähem und starkwandigem Material hergestellt. Im Regelfall bestehen sie aus einem kräftigen Blechformteil.Hand tools with rotary tools, such as angle grinders, are used universally and in the most diverse areas. Through a variety of rotary tools, this type of tools can be used for a variety of purposes and is very popular because of its performance. Especially when used with disc-shaped rotary tools such tools must be provided with protective hoods. These not only keep sparks and worn material particles away from the operator, but also prevent high-speed ejected parts of a broken rotary tool from reaching and injuring the operator's area. Such protective hoods are known. They have a covering area to the rotating tool, and release the rotary tool in another area, so that it can be applied there to the workpiece to be machined. These protective hoods are to be able to fulfill their task of protecting the operator and the surrounding areas effectively and to provide adequate protection especially against bursting rotary tools offer, which release a high energy, made of strong, mostly tough and strong-walled material. As a rule, they consist of a strong sheet metal part.

Die DE 295 08 950 U1 zeigt eine Schutzhaube für ein Handwerkzeug mit einem Rotationswerkzeug. Eine außen umfangsseitig von einem Kragen begrenzten Axialwand der Schutzhaube dient zum bereichsweisen Abdecken des Rotationswerkzeugs und weist mehrere fingerartige, sich radial erstreckende Ausprägungen auf, die sich in Richtung des radial außenliegenden Rands der Schutzhaube hin verjüngen.The DE 295 08 950 U1 shows a protective cover for a hand tool with a rotary tool. An outer peripheral side of a collar bounded axial wall of the protective cover serves to partially cover the rotary tool and has a plurality of finger-like, radially extending forms, which taper in the direction of the radially outer edge of the protective hood.

An diesen Schutzhauben ist nachteilig, dass sie aufgrund ihrer materialstarken, kräftigen Ausführung relativ schwer sind und einen hohen Materialverbrauch aufweisen.On these covers is disadvantageous that they are relatively heavy due to their strong material, powerful design and have a high material consumption.

Vorteile der ErfindungAdvantages of the invention

Dem gegenüber bietet die Erfindung den Vorteil, dass sich die Wandbereiche - ausgehend von einem innenumfangsseitigen Bund - bis zum Kragen erstrecken und radial verlaufende Stoßflächen zur Ausbildung von Versteifungsstufen aufweisen. Durch diese Ausführungsform ergibt sich bereits bei geringerer Materialstärke eine vergleichsweise hohe Festigkeit, so dass eine Material- und Gewichtseinsparung erfolgt.In contrast, the invention offers the advantage that the wall areas - starting from an inner peripheral side collar - extend to the collar and have radially extending abutment surfaces for the formation of stiffening steps. This embodiment results in a comparatively high strength, even at a lower material thickness, so that material and weight are saved.

Erfindungsgemäß weisen die Wandbereiche radial verlaufenden Stoßflächen auf. Damit ist gemeint, dass die genannten Wandbereiche so aneinander grenzen, dass diese Stoßbereiche jeweils auf einem Radius betreffend den Außenumfang der Schutzhaube verlaufen.According to the invention, the wall regions have radially extending abutment surfaces. By this is meant that the said wall regions adjoin one another such that these impact regions extend in each case over a radius relating to the outer circumference of the protective hood.

Weiterhin ist erfindungsgemäß vorgesehen, dass die Stoßflächen als Stufen ausgebildet sind. Eine stufenweise Ausbildung der Stoßflächen zwischen den einzelnen Wandbereichen ergibt eine besondere Materialsteifigkeit bei gleichem Materialaufwand oder, bei zumindest gleicher Steifigkeit einen geringeren Materialaufwand und damit eine Kosten- und Gewichtseinsparung. Gleichzeitig führen die als Stufen ausgebildeten Stoßzonen dazu, dass Materialpartikel oder auch Teile geborstener Rotationswerkzeuge in ihrer Flugbahn innerhalb der Schutzhaube abgebremst und abgelenkt werden, so dass ein Durchschlagen der Schutzhaube aufgrund des bereits vorher eintretenden starken Energieverlustes nicht möglich ist.Furthermore, the invention provides that the abutting surfaces are formed as steps. A stepwise design of the abutment surfaces between the individual wall regions results in a special material rigidity with the same material expenditure or, with at least the same rigidity, a lower material expenditure and thus a cost and weight saving. At the same time designed as stages shock zones lead to material particles or Even parts of ruptured rotary tools are braked in their trajectory within the protective cover and deflected, so that a breakthrough of the guard is not possible due to the already previously occurring strong energy loss.

Ferner ist erfindungsgemäß vorgesehen, dass die Stufen Versteifungsstufen bilden. Durch diese Ausgestaltung der Stufen in Hinblick auf ihre Materialdicke und den Verlauf der Stufe von Wandfläche zu Wandfläche lässt sich eine die Struktur der Schutzhaube verstärkende und versteifende Wirkung erzielen.Furthermore, the invention provides that the steps form stiffening stages. As a result of this configuration of the steps with regard to their material thickness and the progression of the step from wall surface to wall surface, it is possible to achieve an effect reinforcing and stiffening the structure of the protective cover.

In einer bevorzugten Ausführungsform ist vorgesehen, dass mehrere der Wandbereiche flächen- und/oder geometriegleich sind. Flächengleich bedeutet, dass die einzelnen Wandbereiche den im Wesentlichen selben Flächeninhalt haben; geometriegleich bedeutet, dass die Wandbereiche ähnliche Winkel aufweisen.In a preferred embodiment, it is provided that several of the wall areas are surface and / or geometry identical. Equal area means that the individual wall areas have essentially the same area; The same geometry means that the wall areas have similar angles.

In einer weiteren Ausführungsform ist vorgesehen, dass an die Axialwand der Kragen vorzugsweise einstückig angrenzt. Hiermit ist gemeint, dass die Axialwand in einem im Wesentlichen 90° betragenden Winkel in Axialrichtung angeformt ist, wobei vorzugsweise Axialwand und Kragen aus einem Stück bestehen.In a further embodiment it is provided that the collar is preferably integrally adjacent to the axial wall. By this is meant that the axial wall is formed in an axial direction at a substantially 90 ° angle, wherein preferably axial wall and collar consist of one piece.

In einer weiteren Ausführungsform ist vorgesehen, dass der Kragen eine Mantelfläche aufweist, die mit gleichem koaxialen Abstand zur Drehachse des Rotationswerkzeuges verläuft. Hiermit ist gemeint, dass sich die axial versetzt liegende Ausführungsform der Wandbereich der Axialwand im Kragen nicht oder nicht wesentlich weiter fortsetzt, sondern dass die Mantelfläche im Wesentlichen glattflächig ausgeformt ist. In Verbindung mit der axial versetzten Ausführung der einzelnen Wandbereiche ergibt sich hierdurch eine noch bessere Versteifung der Schutzhaube.In a further embodiment it is provided that the collar has a lateral surface which extends at the same coaxial distance to the axis of rotation of the rotary tool. By this is meant that the axially offset embodiment of the wall portion of the axial wall in the collar does not continue or not substantially further, but that the lateral surface is formed substantially smooth surface. In conjunction with the axially offset design of the individual wall areas, this results in an even better stiffening of the protective hood.

In einer weiteren Ausführungsform der Erfindung ist vorgesehen, dass die Schutzhaube einen Rotationswerkzeugfreigabebereich aufweist, der zumindest entlang eines Abschnitts als Krempelrand ausgebildet ist. Unter Rotationswerkzeugfreigabebereich wird der Bereich verstanden, in dem das Rotationswerkzeug von der Schutzhaube nicht überdeckt wird, sondern zum Arbeitseinsatz frei rotiert und dem zu bearbeitenden Werkstück angelagert wird. Die wenigstens abschnittsweise Ausführung des Rotationswerkszeugfreigabebereichs als Krempelrand führt zu einer besonders stabilen, steifen Konstruktion.In a further embodiment of the invention, it is provided that the protective hood has a rotary tool release area, which forms at least along a portion as a carding edge is. Under Rotationswerkzeugfreigabebereich the area is understood in which the rotary tool is not covered by the guard, but is rotated freely for labor input and attached to the workpiece to be machined. The at least sections execution of Rotationswerkszeugfreigabebereichs as a carding edge leads to a particularly stable, rigid construction.

In einer weiteren Ausführungsform der Erfindung ist vorgesehen, dass die Schutzhaube zu ihrer abnehmbaren Befestigung am Handwerkszeug eine Spannvorrichtung aufweist. Mit einer solchen Spannvorrichtung ist die lösbare Befestigung der Schutzhaube an dem Handwerkszeug möglich.In a further embodiment of the invention, it is provided that the protective hood has a clamping device for its removable attachment to the tool. With such a clamping device, the detachable attachment of the guard on the tools is possible.

Die Erfindung umfasst ferner ein Handwerkszeug mit einer Schutzhaube nach einem oder mehreren der vorhergehenden Ansprüche. Handwerkszeuge mit einer erfindungsgemäßen Schutzhaube sind durch die genannten Konstruktionsvorteile gewichtssparend und im Einsatz vielseitiger und flexibler, hierbei auch kräfteschonender für den Bediener.The invention further comprises a hand tool with a protective hood according to one or more of the preceding claims. Hand tools with a protective hood according to the invention are weight-saving due to the mentioned design advantages and versatile in use and more flexible, thereby also saving energy for the operator.

Die Erfindung wird im Nachfolgenden anhand von Figuren näher erläutert.The invention will be explained in more detail below with reference to figures.

Es zeigen

Figur 1
eine Schutzhaube in Aufsicht
Figur 2
eine Schutzhaube in Teilperspektive.
Show it
FIG. 1
a protective hood in supervision
FIG. 2
a protective cover in partial perspective.

Figur 1 zeigt eine Schutzhaube 1 für ein nicht dargestelltes Handwerkszeug. Diese weist, im Wesentlichen einseitig von einem Spannring 2 abgehend, eine Axialwand 3 auf. Diese erstreckt sich im Wesentlichen in Radialrichtung R von dem Spannring abgehend, und bildet hierbei Wandbereiche 4 aus, die axial versetzt zueinander angeordnet sind. Zwischen den einzelnen Wandbereichen 4 befinden sich Stoßzonen 5, die als Stufen 6 ausgebildet sind. Die Wandbereiche 4 sind - in Axialrichtung gesehen - abwechselnd erhöht und zurücktretend angeordnet, und hierbei über die als Stufen 6 ausgebildeten Stoßzonen 5 einstückig miteinander verbunden. Statt einer einstückigen Ausführung (beispielsweise aus einem einzigen Prägeteil bestehend) ist es selbstverständlich auch möglich, einzelne Wandbereiche 4 beispielsweise durch Verschweißen oder eine andere Verbindungstechnik miteinander zu verbinden und so die beschriebene Ausführungsform herbeizuführen. Gerade eine Verbindung einzelner Wandbereiche 4 durch Verschweißen ergibt eine besonders gute Versteifung bei vorgegebener Materialstärke, ist aber in der Fertigung etwas aufwendiger. Von den Wandbereichen 4 bilden mehrere jeweils ein Ringsegment 7 aus, wobei jedes Ringsegment 7 durch einen am Spannring 2 angelagerten Bund 8 innenumfangseitig und durch einen Kragen 9 außenumfangseitig begrenzt wird. Die in einem ersten Endbereich 10 und in einem zweiten Endbereich 11 der Axialwand 3 belegenen Wandbereiche 4 sind so ausgebildet, dass sie zum jeweils innenseitig benachbarten, als Ringsegment 7 ausgeführten Wandbereich 4 eine als Stufe 6 ausgebildete Stoßzone 5, zum ersten Endbereich beziehungsweise zum zweiten Endbereich hin jedoch einen Krempelrand 12 aufweisen. Der Krempelrand 12 ist einstückig zur Axialwand 3. Die am ersten Endbereich 10 beziehungsweise am zweiten Endbereich 11 gelegenen Wandbereiche 4 sind nicht ringsegmentförmig ausgebildet, sondern dergestalt, dass sie innenumfangsseitig an den Außenumfang des Spannrings anschließen, wobei der erste Endpunkt 13 und der zweite Endpunkt 14 des ersten Endbereiches 10 und des zweiten Endbereiches 11 durch die Mittelachse 15 des Spannrings 2 querverbunden eine 180°-förmige Überdeckung eines nicht dargestellten Rotationswerkzeuges ergibt, mithin also, begrenzt durch eine gedachte Querverbindung zwischen dem ersten Endbereich 10 und dem zweiten Endbereich 11 durch die Mittelachse 15 mit einer Mantelfläche 16 des Kragens 9, FIG. 1 shows a protective hood 1 for a hand tool, not shown. This has, essentially on one side of a clamping ring 2 outgoing, an axial wall 3. This extends substantially in the radial direction R of the clamping ring outgoing, and in this case forms wall portions 4, which are arranged axially offset from one another. Between the individual wall regions 4 are impact zones 5, which are formed as steps 6. The wall portions 4 are - seen in the axial direction - alternately increased and arranged zurücktretend, and in this case integrally connected to each other via the formed as a step 6 shock zones 5. Instead of a one-piece design (for example, consisting of a single embossed part), it is of course also possible to connect individual wall portions 4, for example by welding or other connection technology together and thus bring about the embodiment described. Just a connection of individual wall portions 4 by welding results in a particularly good stiffening at a given material thickness, but is somewhat more expensive in production. Of the wall portions 4, more each form a ring segment 7, wherein each ring segment 7 is bounded by a collar 8 attached to the clamping ring 2 on the inner circumference side and by a collar 9 on the outer peripheral side. The wall regions 4 located in a first end region 10 and in a second end region 11 of the axial wall 3 are designed such that they provide a shock zone 5, designed as a step 6, for the respective adjacent inner wall region 4, designed as a ring segment 7, for the first end region or for the second end region however, have a carding edge 12. The carding edge 12 is integral with the axial wall 3. The wall regions 4 located at the first end region 10 or at the second end region 11 are not ring-segment-shaped, but such that they adjoin the outer circumference of the clamping ring on the inner peripheral side, wherein the first end point 13 and the second end point 14 the first end portion 10 and the second end portion 11 cross-connected by the central axis 15 of the clamping ring 2 results in a 180 ° -shaped overlap of a rotary tool, not shown, therefore, limited by an imaginary cross connection between the first end portion 10 and the second end portion 11 through the central axis 15 with a lateral surface 16 of the collar 9,

einen Halbkreis bildet. Durch die Ausführung als Ringsegmente 7 der Axialwand 3 ergibt sich in Verbindung mit den Stufen 6 eine erhebliche Versteifung der Axialwand 3 im Vergleich zu einer flächigen Ausführung. Diese wird durch eine wiederum ebenenversetzte Ausführung der äußeren Wandbereiche 4 und die Anordnung eines Krempelrandes 12 jeweils im ersten Endbereich 10 und dem zweiten Endbereich 11 der Axialwand 3 noch deutlich verstärkt.forms a semicircle. Due to the design as ring segments 7 of the axial wall 3 results in conjunction with the steps 6, a significant stiffening of the axial wall 3 in comparison to a flat design. This is further enhanced by a turn offset embodiment of the outer wall portions 4 and the arrangement of a carding edge 12 respectively in the first end portion 10 and the second end portion 11 of the axial wall 3.

Je nach Ausgestaltung der einzelnen Wandbereiche 4 und der Stufen 6, insbesondere auch in Hinblick auf Materialstärke und Vertiefungsgrad (Ebenenversatz) können unterschiedliche Versteifungsgrade der Axialwand 3 erzielt werden.Depending on the configuration of the individual wall regions 4 and the steps 6, in particular also with regard to material thickness and depth (level offset), different degrees of reinforcement of the axial wall 3 can be achieved.

Figur 2 zeigt eine Teilperspektive der Schutzhaube 1 mit dem zweiten Endbereich 11 und dem dort umfangsseitig angeordneten Krempelrand 12. Die einzelnen Wandbereiche 4, insbesondere die Ringsegmente 7, verlaufen in einem Winkelbereich 17 dergestalt in die Mantelfläche 16 des Kragens 9, dass sie einen gleichen koaxialen Abstand zur Drehachse des nicht dargestellten Rotationswerkzeuges aufweisen, ihr oben beschriebener Axialversatz folglich im Winkelbereich 17 endet und sich nicht in der Mantelfläche 16 fortsetzt. Dies trägt wiederum zu einer erheblichen Versteifung der Konstruktion bei. FIG. 2 shows a partial perspective of the protective hood 1 with the second end portion 11 and the peripheral there arranged carding edge 12. The individual wall portions 4, in particular the ring segments 7, extend in an angular range 17 in such a manner in the lateral surface 16 of the collar 9, that they have a same coaxial distance to Have rotational axis of the rotary tool, not shown, thus their above-described axial offset ends in the angular range 17 and does not continue in the lateral surface 16. This in turn contributes to a significant stiffening of the construction.

Claims (7)

  1. Protective hood for a portable tool having a rotary tool, having an axial wall (3), which is bounded on the outer peripheral side by a collar (9), for covering regions of the rotary tool, wherein the axial wall (3) has wall regions (4) which are located in a manner axially offset in relation to one another and are connected together, in particular integrally, characterized in that the wall regions (4) - starting from a shoulder (8) on the inner peripheral side - extend as far as the collar (9) and have radially extending abutting surfaces in order to form reinforcing steps.
  2. Protective hood according to Claim 1, characterized in that a plurality of wall regions (4) have the same area and/or geometry.
  3. Protective hood according to one or both of the preceding claims, characterized in that the collar (9) integrally adjoins the axial wall (3).
  4. Protective hood according to one or more of the preceding claims, characterized in that the collar (9) has a lateral surface (16) which extends at an equal coaxial distance from the rotational axis of the rotary tool.
  5. Protective hood according to one or more of the preceding claims, characterized in that the protective hood (1) has a rotary tool release region which is formed as a turned-back rim (12) at least along one section.
  6. Protective hood according to one or more of the preceding claims, characterized in that the protective hood (1) has a clamping means in order to fasten it in a removable manner to the portable tool.
  7. Portable tool having a protective hood (1) according to one or more of the preceding claims.
EP06819319A 2005-12-27 2006-11-08 Protective hood for a portable tool Not-in-force EP1968768B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005062458A DE102005062458A1 (en) 2005-12-27 2005-12-27 Protective cap for handtool has rotational tool with axial side to cover the rotational tool and with side areas lying next to each other and offset axially inter-connected as a piece; handtool with such cap
PCT/EP2006/068207 WO2007073973A1 (en) 2005-12-27 2006-11-08 Protective hood for a portable tool

Publications (2)

Publication Number Publication Date
EP1968768A1 EP1968768A1 (en) 2008-09-17
EP1968768B1 true EP1968768B1 (en) 2012-03-28

Family

ID=37726760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819319A Not-in-force EP1968768B1 (en) 2005-12-27 2006-11-08 Protective hood for a portable tool

Country Status (5)

Country Link
US (1) US20080289193A1 (en)
EP (1) EP1968768B1 (en)
CN (1) CN101351303B (en)
DE (1) DE102005062458A1 (en)
WO (1) WO2007073973A1 (en)

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Also Published As

Publication number Publication date
CN101351303A (en) 2009-01-21
DE102005062458A1 (en) 2007-07-05
CN101351303B (en) 2012-06-13
US20080289193A1 (en) 2008-11-27
WO2007073973A1 (en) 2007-07-05
EP1968768A1 (en) 2008-09-17

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