EP2106326B1 - Protective hood securing device - Google Patents

Protective hood securing device Download PDF

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Publication number
EP2106326B1
EP2106326B1 EP07822409.4A EP07822409A EP2106326B1 EP 2106326 B1 EP2106326 B1 EP 2106326B1 EP 07822409 A EP07822409 A EP 07822409A EP 2106326 B1 EP2106326 B1 EP 2106326B1
Authority
EP
European Patent Office
Prior art keywords
protective hood
protective
tool
protective cover
hood
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.)
Active
Application number
EP07822409.4A
Other languages
German (de)
French (fr)
Other versions
EP2106326A1 (en
Inventor
Cornelius Boeck
Joachim Schadow
Sinisa Andrasic
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
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP2106326A1 publication Critical patent/EP2106326A1/en
Application granted granted Critical
Publication of EP2106326B1 publication Critical patent/EP2106326B1/en
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Anticipated expiration legal-status Critical

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5009—For portable articles
    • Y10T70/5022—Tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5611—For control and machine elements

Definitions

  • the invention relates to a protective hood locking device according to the preamble of claim 1.
  • the guard is rotatably mounted on a nozzle of a flange of the angle grinder and releasably secured with only a single positive locking means.
  • the flange will pass centrally from the spindle of the angle grinder.
  • the spindle carries a separating or grinding disk, which can be tensely tensioned, for cutting and machining workpieces, which is partially encompassed by the protective hood.
  • the protective hood on the handheld power tool is to be positioned so that it can be adjusted in a rotational manner such that the area of the grinding wheel facing the user is encompassed by the protective hood.
  • an area of the grinding wheel pointing away from the user towards the workpiece engagement projects radially beyond the flange.
  • the publication US 6,699,114 B1 discloses a hand tool, a protective hood and a protective element.
  • the guard is fastened by means of a fastening device to a spindle neck of the power tool fastened.
  • the portable power tool has a movable protective element which is intended to protect an operator from touching a rotating tool and from flying around processing residues.
  • the invention according to claim 1 is based on a protective hood locking device for a hand tool, in particular for an angle grinder, with a protective hood unit having a protective hood, wherein the protective hood positively and / or non-positively coupled with a machine neck of a power tool and thus navfestlegbar, and a fuse unit with at least one securing element, the is provided together with the protective hood unit for protection in the case of a bursting tool, wherein the securing element is at least partially formed by an additional protective cover to the protective hood.
  • the protective hood unit is preferably provided in front of a tool, in particular in front of a disc-shaped, rotatably drivable tool, and / or in front of the operator tossed machining residues and fixed to the handheld power tool in a working position.
  • a "protective cover” should be understood to mean, in particular, a cover which, in addition to the protective hood, covers at least a portion of a region provided for receiving the tool in the case of a bursting tool.
  • the protective cover and the protective hood are designed to protect the operator for absorbing forces of an outwardly projecting tool part of a tool that has burst during operation of the portable power tool.
  • the protective cover particularly advantageously covers an angle range of the tool of at least 30 °, preferably of at least 90 ° and particularly advantageously of substantially 180 °, so that, together with the protective hood, in the case of a bursting tool, a substantially complete covering of the tool is achieved can.
  • substantially 180 ° is meant in this case in particular a coverage of an angular range of the tool of 180 ° ⁇ 10%.
  • the securing unit or the protective cover of the securing unit can also be formed from a plurality of securing elements, which are preferably arranged in a circumferential direction or in a rotational direction of the tool successively within the securing unit, such as two securing elements, each having an angular range of the tool of approx 90 ° cover, and / or the individual securing elements may be formed like a lamella and / or there are any further, the skilled person appear useful design variants of the fuse elements at any time conceivable.
  • the securing element is at least partially mounted on the protective hood, whereby a particularly compact, space-saving arrangement of the protective cover can be achieved.
  • Particularly advantageous in this case is a shape and / or contour of the Secured element at least partially adapted to a shape and / or contour of the protective hood.
  • the term "mounted on the protective hood” should be understood in particular to mean that the protective cover has at least one contact point, preferably a contact surface, together with the protective hood and / or has at least one overlapping area with the protective hood and / or via a further component, in particular a bearing component, may be in contact with the protective hood.
  • the protective cover at least partially rotatably disposed against the protective cover, an advantageous movement or rotation of the protective cover can be achieved in a backup position in the case of a bursting tool and it can also in a regular operation of the power tool an advantageous view of an operator to be machined Object can be achieved by the protective cover is advantageously stored in a rest position at least partially within the protective hood unit, in particular the protective hood.
  • the protective cover is preferably arranged in the rest position within the guard locking device or the protective hood unit.
  • the protective cover is arranged at least partially on a side of the protective hood facing a tool, a space-saving arrangement can advantageously be achieved and / or a pulse or kinetic energy of a tool part thrown outwards and striking the protective cover can advantageously be moved or moved. to achieve rotation of the guard from a rest position to a secure position.
  • the protective cover forms a mounting unit with the protective hood during assembly of the protective hood unit with the power tool.
  • the guard locking device has at least one guide element which is provided for a movable mounting of the protective cover, whereby in particular a targeted movement or a targeted rotation of the protective cover from a rest position into a safety position to protect the operator can be achieved before a bursting tool.
  • the guide element is at least partially formed integrally with the protective hood unit, which advantageously further components, space, installation costs and costs can be saved.
  • the protective hood unit has a protective collar which surrounds a receiving area for a hand tool by at least 270 ° in a circumferential direction, whereby an advantageous attachment of the guard unit in the case of a bursting tool on the power tool can be achieved.
  • an at least partially captive guidance of the protective cover in a circumferential direction can be achieved if the protective hood collar is at least partially formed by the guide element.
  • the protective hood collar is formed at least partially stepped, whereby an advantageous and in particular torsion-proof attachment of the protective hood unit or the protective hood on the power tool in a first stage and a simultaneous possibility a leadership of the protective cover in a movement or rotation in a backup position can be achieved by means of the protective hood collar in a second stage.
  • a secure arrangement of the protective cover in a secure position and thus a particularly advantageous securing position of the protective hood unit in the case of a bursting tool for an operator in front of the operator thrown tool parts, can be achieved when the guard has a receiving area for a tool and the protective cover in one Secured together with the guard covering an angular range of at least 235 °, preferably of at least 270 ° and more preferably of substantially 360 ° of the receiving area.
  • the term "substantially 360 °" is to be understood as meaning, in particular, an angular range of the recording range of 320 ° to 360 °.
  • the invention comprises a hand tool for a rotating, preferably disc-shaped tool, with a machine housing having a flange or a machine neck on which a protective hood, in particular made of sheet metal, for covering the tool is releasably clamped, wherein the protective cover a Protective hood body has, which consists of a circular disk-shaped piece, in particular with an angled outer edge and has a central circular recess, at the edge of a protective hood or -kragen is formed, which carries a clamping band in an annular manner, which is contractible by means of a clamping means and wherein an acting between machine neck and protective rotation between guard and machine neck is arranged in the form of a profiling, wherein the protective cover on the clamping band and / or on the clamping means in its clamping position repeatedly positively and / or non-positively coupled with the machine neck and thus rotatable and can be brought to reach a release position except positive engagement and / or adhesion to the machine neck, the protective cover
  • FIG. 1 is a hand tool machine system 40 with an angle grinder formed and shown only partially hand tool 12 and a protective hood device 10 with a protective hood unit 14.
  • the hand tool 12 comprises a hand tool housing 42 and a receiving unit 44 for receiving the guard unit 14 or a tool 22 formed by a cutting disc, which is bolted to the power tool housing 42. From the receiving unit 44 protrudes on a side facing away from the power tool housing 42 side 46, a drive shaft 48 which is connectable at its free end 50 with the disc-shaped tool 22 and is rotatably driven about an axis 52.
  • the protective hood unit 14 comprises a protective hood 16 and a locking unit 88.
  • the protective hood 16 covers an angular range of the tool 22 of approximately 180 ° in an assembled state of the hand-held power tool system 40 and has for this purpose a semi-disc-shaped protective hood body 54 and a guard edge 56 which is initially vertical is aligned to the half-disc-shaped guard body 54 and then parallel to the half-disc-shaped guard body 54 in a radial direction 58 inwardly.
  • the protective hood device 10 has, in addition to the protective hood unit 14, a securing unit 18 with a securing element 20, which is provided together with the protective hood unit 14 or its protective hood 16 for protection in the case of a bursting tool 22.
  • the securing element 20 is formed by an additional protective cover 24 for the protective cover 16 and covers an angular range of approximately 180 ° of the tool 22.
  • the protective cover 24 is mounted on the protective cover 16 and for this purpose has a shape or a contour of the protective hood 16.
  • the protective hood 16 has a receiving area 38 for receiving the tool 22, wherein the protective cover 24 is mounted on the protective hood 16 within the receiving area 38 or on a side 26 of the receiving area 38 facing the tool 22, so that the protective hood 16 in this case has an outer envelope for the protective cover 24 and the protective cover 24 forms an inner shell for the protective cover 16.
  • the protective cover 24 In a rest position or in a position in a regular operation of the power tool 12, the protective cover 24 is arranged in an almost complete coverage with the protective cover 16 thereon ( FIGS. 1 and 2 ).
  • the protective cover 24 is movably mounted on the protective cover 16, so that the protective cover 24 in the case of a bursting tool 22 can receive a pulse of the protective hood unit 14 and the protective cover 24 striking tool part of the ruptured tool 22 and by means of the pulse in a securing position is movable.
  • the protective hood unit 14 or the protective hood 16 has a protective hood collar 30, which encloses a receiving region 32 for receiving the handheld power tool 12 or the receiving unit 44 in a circumferential direction 34, 36 by 360 ° ( FIG. 1 and 2 ).
  • the circumferential direction 34, 36 is circumferentially around the axis 52 of the drive shaft 48 and substantially aligned perpendicular to this.
  • the protective hood collar 30 is designed to be stepped along the axis 52 and, in a partial region 60 facing the tool 22 or the receiving region 38 for the tool 22, has a larger cross-sectional area than a cross-sectional surface in a tool 22 or the receiving region 38 for the tool 22 remote portion 62 (see. FIG. 3 ).
  • the partial area 60 with the larger cross-sectional area has, on a side 64 facing the receiving area 32 for the handheld power tool 12, a guide element 28 of the protective hood locking device 14, which is formed integrally with the protective hood collar 30.
  • the guide element 28 is provided for a movable mounting of the protective cover 24 in the protective hood unit 14 and formed by a circumferential, extending in a radial direction 58 outwardly extending guide.
  • the protective cover 24 is arranged rotatably about the axis 52 of the drive shaft 48 against the protective cover 16 and has for this purpose on each of a guide web 66 formed guide elements which are mounted in the guide groove, wherein in FIG. 3 only one guide bar 66 can be seen. As a result, the protective cover 24 is secured against undesired falling out of the protective hood unit 14 during a movement into a securing position and / or during operation of the power tool 12.
  • the guard locking device 10 has a fuse unit, not shown, the undesirable movement of the protective cover 24 in the backup position in regular operation prevents the power tool 12.
  • the fuse unit allows movement of the protective cover 24 in a direction of rotation 68 of the tool 22, depending on a pulse transmitted to the protective cover 24. If, in the case of a bursting tool 22, an outwardly thrown tool part strikes the guard unit 14, a pulse transmitted to the guard 24 exceeds a securing force of the securing unit 18 and the guard 24 moves in the direction of rotation 68 from its rest position to the guard Protection position turned.
  • the protective cover 24 and the protective cover 16 cover a complete angular range of the receiving region 38 of the tool 22 from 360 °.
  • the protective hood securing device 10 has a stop unit 70 which permits rotation of the protective cover 24 ended in the direction of rotation 68 after reaching the securing position.
  • the stop unit 70 has two stop elements formed by a respective latching element 72, 74, wherein one is arranged on a radially inwardly directed side 76 of the protective hood rim 56 and on a side 78 of the protective cover 24 facing the protective hood edge 56.
  • the protective hood edge 56 has a stop element 80 in the direction of rotation 68 after the latching element 72, wherein the stop element 80 and the latching element 72 are arranged on an edge region 82 of the protective hood edge 56 pointing opposite to the direction of rotation 68.
  • the latching element 74 of the protective cover 24 is arranged on an edge region 84 pointing in the direction of rotation 68.
  • the partial region 62 of the protective collar 30 with the smaller cross-sectional area is surrounded in the radial direction 58 to the outside by a tension band 86 of the closure unit 88, wherein the protective collar collar 30 and the tension band 86 are connected to one another by means of a welded connection (FIG. FIGS. 1 to 3 ). Together with the clamping band 86, the protective hood collar 30 is provided for fastening the protective hood unit 14 to the handheld power tool 12 or to the receiving unit 44, which has a cylindrical receiving flange 90 for this purpose.
  • the partial region 62 with the smaller cross-sectional area along the axis 52 of the drive shaft 48 is designed to be slotted so that a cross-sectional area for achieving the frictional connection between the protective hood collar 30 on the receiving flange 90 can be effectively reduced by means of the tension band 86.
  • the tension band 86 has two end regions 92, 94, which extend in the radial direction 58 to the outside. The two end regions 92, 94 each have a recess 96 through which engages a closure element of the closure unit 88 (not shown) and formed by a clamping screw (cf. FIG. 1 ).
  • the protective hood 16 is fastened by means of the closure unit 88 to the receiving unit 44 or to the receiving flange 90 due to a frictional connection between the protective hood collar 30 or the clamping band 86 and the receiving flange 90 in a working position.
  • further closure elements such as, for example, a tensioning lever and / or form-locking elements, etc., instead of the tensioning screw.
  • FIG. 4 an alternative embodiment of the protective hood device 10 is shown with a protective hood unit 14.
  • the protective hood unit 14 has a protective hood 16 a protective hood collar 30, which has a constant cross-sectional area along an axis of a drive shaft.
  • the protective hood 16 On a side facing a receiving region 38 of a tool 98, the protective hood 16 has a guide element 28 which serves to guide a protective cover 24 of a securing unit 18.
  • the guide element 28 is arranged on a receiving region 38 facing edge region 100 of a guard body 54 of the protective cover 16 and extends along the axis of the drive shaft.
  • the guide element 28 is annular and has a guide groove 104 on a radially outward-facing side 102, in which the protective cover 24 is movably mounted or a guide element 106 of the protective cover 24 is guided.
  • the guide member 106 and the guide groove 104 are formed L-shaped, so that the protective cover 24 is secured against falling out upon rotation into a securing position or in an operation of a power tool.
  • the securing unit 18 or the protective cover 24 can be formed by a plurality of securing elements, which are arranged successively in the circumferential direction, for example, and / or by a collapsible securing element are mounted movably on the protective hood 16.
  • the securing elements or the securing element can be brought or moved by means of a pulse of a hit on the protective cover 24 tool part of a broken tool 22 in the securing position or moved.
  • the securing elements are also preferably connected to each other by means of a respective driving element, so that all fuse elements of the securing unit 18 can be brought into the securing position or moved during a momentum transfer from a striking a fuse element tool part of a ruptured tool 22.

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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)
  • Portable Power Tools In General (AREA)
  • Sawing (AREA)
  • Harvester Elements (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Schutzhaubensicherungsvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a protective hood locking device according to the preamble of claim 1.

Aus der EP 812 657 A1 ist bereits ein Winkelschleifer mit verstellbarer Schutzhaube bekannt. Dabei ist die Schutzhaube auf einem Stutzen eines Flansches des Winkelschleifers drehverstellbar und mit nur einem einzigen formschlüssigen Arretiermittel lösbar festlegbar gelagert. Der Flansch wird mittig von der Spindel des Winkelschleifers durchtreten. Die Spindel trägt an ihrem freien Ende drehmitnehmbar spannbar eine Trenn- bzw. Schleifscheibe zum Schneiden und Bearbeiten von Werkstücken, die von der Schutzhaube teilweise umgriffen wird. Dabei ist die Schutzhaube an der Handwerkzeugmaschine so dreheinstellbar zu positionieren, dass der dem Anwender zugewandte Bereich der Schleifscheibe von der Schutzhaube umgriffen wird. Zugleich steht ein vom Anwender wegweisender Bereich der Schleifscheibe zum Werkstückeingriff radial frei über den Flansch hinaus.From the EP 812 657 A1 already an angle grinder with adjustable protective hood is known. In this case, the guard is rotatably mounted on a nozzle of a flange of the angle grinder and releasably secured with only a single positive locking means. The flange will pass centrally from the spindle of the angle grinder. At its free end, the spindle carries a separating or grinding disk, which can be tensely tensioned, for cutting and machining workpieces, which is partially encompassed by the protective hood. In this case, the protective hood on the handheld power tool is to be positioned so that it can be adjusted in a rotational manner such that the area of the grinding wheel facing the user is encompassed by the protective hood. At the same time, an area of the grinding wheel pointing away from the user towards the workpiece engagement projects radially beyond the flange.

Die DruckschriftThe publication US 6,699,114 B1US 6,699,114 B1 offenbart eine Handwerkzeugmaschine, eine Schutzhaube und eine Schutzelement. Die Schutzhaube ist mittels einer Befestigungsvorrichtung an einem Spindelhals der Handwerkzeugmaschine befestigbar ausgebildet. Die Handwerkzeugmaschine weist ein bewegliches Schutzelement auf, das dazu vorgesehen ist, einen Bediener vor einer Berührung eines rotierenden Werkzeugs und vor umherfliegenden Bearbeitungsresten zu schützen.discloses a hand tool, a protective hood and a protective element. The guard is fastened by means of a fastening device to a spindle neck of the power tool fastened. The portable power tool has a movable protective element which is intended to protect an operator from touching a rotating tool and from flying around processing residues.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung gemäß Anspruch 1 geht aus von einer Schutzhaubensicherungsvorrichtung für eine Handwerkzeugmaschine, insbesondere für eine Winkelschleifmaschine, mit einer Schutzhaubeneinheit, die eine Schutzhaube aufweist, wobei die Schutzhaube formschlüssig und/oder kraftschlüssig mit einem Maschinenhals einer Handwerkzeugmaschine kuppelbar und damit drehfestlegbar ist, und einer Sicherungseinheit mit zumindest einem Sicherungselement, das zusammen mit der Schutzhaubeneinheit zu einem Schutz im Falle eines berstenden Werkzeugs vorgesehen ist, wobei das Sicherungselement zumindest teilweise von einer zur Schutzhaube zusätzlichen Schutzabdeckung gebildet ist. Vorzugsweise ist die Schutzhaubeneinheit in einem regulären Betrieb der Handwerkzeugmaschine zu einem Schutz eines Bedieners vor einem Werkzeug, insbesondere vor einem scheibenförmigen, rotierend antreibbaren Werkzeug, und/oder vor in Richtung des Bedieners geschleuderten Bearbeitungsresten vorgesehen und an der Handwerkzeugmaschine in einer Arbeitsposition befestigt. Des Weiteren soll unter einer "Schutzabdeckung" insbesondere eine Abdeckung verstanden werden, die zusätzlich zur Schutzhaube zumindest einen Teilbereich eines zur Aufnahme des Werkzeugs vorgesehen Bereichs im Falle eines berstenden Werkzeugs abdeckt. Die Schutzabdeckung und die Schutzhaube sind hierzu zum Schutz des Bedieners zur Aufnahme von Kräften eines nach außen geschleuderten Werkzeugteils eines im Betrieb der Handwerkzeugmaschine geborstenen Werkzeugs ausgelegt. Durch die erfindungsgemäße Ausgestaltung der Schutzhaubenverdrehsicherungsvorrichtung kann ein effektiver Schutz eines Bedieners der Handwerkzeugmaschine vor dem im Betrieb der Handwerkzeugmaschine rotierenden Werkzeug und/oder insbesondere in einem Schadensfall des Werkzeugs, wie beispielsweise im Falle des berstenden Werkzeugs, vor in Richtung des Bedieners umherfliegenden Teilen des Werkzeugs erreicht werden. Besonders vorteilhaft deckt dabei die Schutzabdeckung einen Winkelbereich des Werkzeugs von mindestens 30°, bevorzugt von mindestens 90° und besonders vorteilhaft von im Wesentlichen 180° ab, so dass zusammen mit der Schutzhaube im Falle eines berstenden Werkzeugs eine im Wesentlichen vollständige Abdeckung des Werkzeugs erzielt werden kann. Unter "im Wesentlichen 180°" soll hierbei insbesondere eine Abdeckung eines Winkelbereichs des Werkzeugs von 180° ± 10% verstanden werden. Des Weiteren kann die Sicherungseinheit bzw. die Schutzabdeckung der Sicherungseinheit auch aus mehreren Sicherungselementen gebildet sein, die vorzugsweise in eine Umfangsrichtung bzw. in eine Rotationsrichtung des Werkzeugs nacheinander innerhalb der Sicherungseinheit angeordnet sind, wie beispielsweise zwei Sicherungselemente, die jeweils einen Winkelbereich des Werkzeugs von ca. 90° abdecken, und/oder die einzelnen Sicherungselemente können lamellenartig ausgebildet sein und/oder es sind weitere, dem Fachmann als sinnvoll erscheinende Ausgestaltungsvarianten der Sicherungselemente jederzeit denkbar.The invention according to claim 1 is based on a protective hood locking device for a hand tool, in particular for an angle grinder, with a protective hood unit having a protective hood, wherein the protective hood positively and / or non-positively coupled with a machine neck of a power tool and thus drehfestlegbar, and a fuse unit with at least one securing element, the is provided together with the protective hood unit for protection in the case of a bursting tool, wherein the securing element is at least partially formed by an additional protective cover to the protective hood. In a regular operation of the handheld power tool, the protective hood unit is preferably provided in front of a tool, in particular in front of a disc-shaped, rotatably drivable tool, and / or in front of the operator tossed machining residues and fixed to the handheld power tool in a working position. Furthermore, a "protective cover" should be understood to mean, in particular, a cover which, in addition to the protective hood, covers at least a portion of a region provided for receiving the tool in the case of a bursting tool. For this purpose, the protective cover and the protective hood are designed to protect the operator for absorbing forces of an outwardly projecting tool part of a tool that has burst during operation of the portable power tool. Due to the inventive design of the guard anti-rotation device, an effective protection of an operator of the power tool before the rotating tool during operation of the power tool and / or in particular in case of damage of the tool, such as in the case of bursting tool, before in the direction of the operator flying parts of the tool achieved become. In this case, the protective cover particularly advantageously covers an angle range of the tool of at least 30 °, preferably of at least 90 ° and particularly advantageously of substantially 180 °, so that, together with the protective hood, in the case of a bursting tool, a substantially complete covering of the tool is achieved can. By "substantially 180 °" is meant in this case in particular a coverage of an angular range of the tool of 180 ° ± 10%. Furthermore, the securing unit or the protective cover of the securing unit can also be formed from a plurality of securing elements, which are preferably arranged in a circumferential direction or in a rotational direction of the tool successively within the securing unit, such as two securing elements, each having an angular range of the tool of approx 90 ° cover, and / or the individual securing elements may be formed like a lamella and / or there are any further, the skilled person appear useful design variants of the fuse elements at any time conceivable.

Erfindungsgemäß ist das Sicherungselement zumindest teilweise an der Schutzhaube gelagert, wodurch eine insbesondere kompakte, Platz sparende Anordnung der Schutzabdeckung erreicht werden kann. Besonders vorteilhaft ist hierbei eine Form und/oder Kontur des Sicherungselements zumindest teilweise an eine Form und/oder Kontur der Schutzhaube angepasst. In diesem Zusammenhang soll unter "an der Schutzhaube gelagert" insbesondere verstanden werden, dass die Schutzabdeckung zumindest einen Kontaktpunkt, vorzugsweise eine Kontaktfläche, zusammen mit der Schutzhaube aufweist und/oder zumindest einen Überdeckungsbereich mit der Schutzhaube aufweist und/oder über ein weiteres Bauteil, insbesondere ein Lagerbauteil, in Kontakt mit der Schutzhaube sein kann.According to the invention, the securing element is at least partially mounted on the protective hood, whereby a particularly compact, space-saving arrangement of the protective cover can be achieved. Particularly advantageous in this case is a shape and / or contour of the Secured element at least partially adapted to a shape and / or contour of the protective hood. In this context, the term "mounted on the protective hood" should be understood in particular to mean that the protective cover has at least one contact point, preferably a contact surface, together with the protective hood and / or has at least one overlapping area with the protective hood and / or via a further component, in particular a bearing component, may be in contact with the protective hood.

Ist zudem die Schutzabdeckung zumindest teilweise gegen die Schutzhaube verdrehbar angeordnet, kann eine vorteilhafte Bewegung bzw. Drehung der Schutzabdeckung in eine Sicherungsposition im Falle eines berstenden Werkzeugs erreicht werden und es kann zudem in einem regulären Betrieb der Handwerkzeugmaschine eine vorteilhafte Sicht eines Bedieners auf ein zu bearbeitendes Objekt erreicht werden, indem die Schutzabdeckung vorteilhaft in einer Ruheposition zumindest teilweise innerhalb der Schutzhaubeneinheit, insbesondere der Schutzhaube, gelagert ist. Vorzugsweise ist die Schutzabdeckung in einem regulären Betrieb einer Handwerkzeugmaschine bzw. in einem ausgeschalteten Betriebsmodus der Handwerkzeugmaschine in der Ruheposition innerhalb der Schutzhaubensicherungsvorrichtung bzw. der Schutzhaubeneinheit angeordnet.In addition, if the protective cover at least partially rotatably disposed against the protective cover, an advantageous movement or rotation of the protective cover can be achieved in a backup position in the case of a bursting tool and it can also in a regular operation of the power tool an advantageous view of an operator to be machined Object can be achieved by the protective cover is advantageously stored in a rest position at least partially within the protective hood unit, in particular the protective hood. In a regular operation of a hand-held power tool or in a switched-off operating mode of the handheld power tool, the protective cover is preferably arranged in the rest position within the guard locking device or the protective hood unit.

Ist zudem die Schutzabdeckung zumindest teilweise an einer einem Werkzeug zugewandten Seite der Schutzhaube angeordnet, kann vorteilhaft eine Platz sparende Anordnung erreicht und/oder es kann vorteilhaft ein Impuls bzw. eine Bewegungsenergie eines nach außen geschleuderten und auf die Schutzabdeckung treffenden Werkzeugteils zu einer Bewegung bzw. zu einer Drehung der Schutzhaube aus einer Ruheposition in eine Sicherungsposition erreicht werden. Dabei soll unter "an der Schutzhaube angeordnet" insbesondere verstanden werden, dass die Schutzabdeckung eine Montageeinheit mit der Schutzhaube bei einer Montage der Schutzhaubeneinheit mit der Handwerkzeugmaschine bildet.If, in addition, the protective cover is arranged at least partially on a side of the protective hood facing a tool, a space-saving arrangement can advantageously be achieved and / or a pulse or kinetic energy of a tool part thrown outwards and striking the protective cover can advantageously be moved or moved. to achieve rotation of the guard from a rest position to a secure position. It should be understood in particular "arranged on the protective hood" that the protective cover forms a mounting unit with the protective hood during assembly of the protective hood unit with the power tool.

In einer vorteilhaften Weiterbildung der Erfindung wird vorgeschlagen, dass die Schutzhaubensicherungsvorrichtung zumindest ein Führungselement aufweist, das zu einer bewegbaren Lagerung der Schutzabdeckung vorgesehen ist, wodurch insbesondere ein gezieltes Bewegen bzw. eine gezielte Drehung der Schutzabdeckung aus einer Ruheposition heraus in eine Sicherungsposition zum Schutz des Bedieners vor einem berstenden Werkzeug erreicht werden kann.In an advantageous development of the invention, it is proposed that the guard locking device has at least one guide element which is provided for a movable mounting of the protective cover, whereby in particular a targeted movement or a targeted rotation of the protective cover from a rest position into a safety position to protect the operator can be achieved before a bursting tool.

Ferner wird vorgeschlagen, dass das Führungselement zumindest teilweise einstückig mit der Schutzhaubeneinheit ausgebildet ist, wodurch vorteilhaft weitere Bauteile, Bauraum, Montageaufwand und Kosten eingespart werden können.It is also proposed that the guide element is at least partially formed integrally with the protective hood unit, which advantageously further components, space, installation costs and costs can be saved.

Es wird zudem vorgeschlagen, dass die Schutzhaubeneinheit einen Schutzhaubenkragen aufweist, der einen Aufnahmebereich für eine Handwerkzeugmaschine um mindestens 270° in eine Umfangsrichtung umgibt, wodurch eine vorteilhafte Befestigung der Schutzhaubeneinheit im Falle eines berstenden Werkzeugs an der Handwerkzeugmaschine erzielt werden kann.It is also proposed that the protective hood unit has a protective collar which surrounds a receiving area for a hand tool by at least 270 ° in a circumferential direction, whereby an advantageous attachment of the guard unit in the case of a bursting tool on the power tool can be achieved.

Ferner kann eine zumindest teilweise verliersichere Führung der Schutzabdeckung in eine Umfangsrichtung erreicht werden, wenn der Schutzhaubenkragen zumindest teilweise von dem Führungselement gebildet ist.Furthermore, an at least partially captive guidance of the protective cover in a circumferential direction can be achieved if the protective hood collar is at least partially formed by the guide element.

Weiterhin wird vorgeschlagen, dass der Schutzhaubenkragen zumindest teilweise gestuft ausgebildet ist, wodurch eine vorteilhafte und insbesondere verdrehsichere Befestigung der Schutzhaubeneinheit bzw. der Schutzhaube an der Handwerkzeugmaschine in einer ersten Stufe und eine gleichzeitige Möglichkeit eine Führung der Schutzabdeckung bei einer Bewegung bzw. Drehung in eine Sicherungsposition mittels des Schutzhaubenkragens in einer zweiten Stufe erreicht werden kann.It is also proposed that the protective hood collar is formed at least partially stepped, whereby an advantageous and in particular torsion-proof attachment of the protective hood unit or the protective hood on the power tool in a first stage and a simultaneous possibility a leadership of the protective cover in a movement or rotation in a backup position can be achieved by means of the protective hood collar in a second stage.

Eine sichere Anordnung der Schutzabdeckung in einer Sicherungsposition und damit eine besonders vorteilhafte Sicherungsposition der Schutzhaubeneinheit im Falle eines berstenden Werkzeugs für einen Bediener vor in Richtung des Bedieners geschleuderten Werkzeugteilen, kann erreicht werden, wenn die Schutzhaube einen Aufnahmebereich für ein Werkzeug aufweist und die Schutzabdeckung in einer Sicherungsposition zusammen mit der Schutzhaube einen Winkelbereich von mindestens 235°, vorzugsweise von mindestens 270° und besonders bevorzugt von im Wesentlichen 360° des Aufnahmebereichs abdeckt. Dabei soll unter "im Wesentlichen 360°" insbesondere ein Winkelbereich des Aufnahmebereichs von 320° bis 360° verstanden werden.A secure arrangement of the protective cover in a secure position and thus a particularly advantageous securing position of the protective hood unit in the case of a bursting tool for an operator in front of the operator thrown tool parts, can be achieved when the guard has a receiving area for a tool and the protective cover in one Secured together with the guard covering an angular range of at least 235 °, preferably of at least 270 ° and more preferably of substantially 360 ° of the receiving area. The term "substantially 360 °" is to be understood as meaning, in particular, an angular range of the recording range of 320 ° to 360 °.

Besonders vorteilhaft umfasst die Erfindung eine Handwerkzeugmaschine für ein rotierendes, vorzugsweise scheibenförmiges Werkzeug, mit einem Maschinengehäuse, das einen Flansch bzw. einen Maschinenhals aufweist, an dem eine Schutzhaube, insbesondere aus Blech bestehend, zum Abdecken des Werkzeugs lösbar spannbar ist, wobei die Schutzhaube einen Schutzhaubenkörper hat, der aus einem kreisscheibenförmigen Stück, insbesondere mit abgewinkeltem Außenrand besteht und eine mittige kreisförmige Ausnehmung hat, an deren Rand ein Schutzhaubenstutzen bzw. -kragen gebildet wird, der ringförmig ein Spannband trägt, das mittels eines Spannmittels zusammenziehbar ist und wobei eine zwischen Maschinenhals und Schutzhaube wirkende Verdrehsicherung zwischen Schutzhaube und Maschinenhals in Gestalt einer Profilierung angeordnet ist, wobei die Schutzhaube über das Spannband und/oder über das Spannmittel in seiner Spannposition mehrfach formschlüssig und/oder kraftschlüssig mit dem Maschinenhals kuppelbar und damit drehfestlegbar ist und zum Erreichen einer Löseposition außer Formschluss und/oder Kraftschluss zum Maschinenhals bringbar ist, wobei die Schutzhaube sodann drehverstellbar ist.Particularly advantageous, the invention comprises a hand tool for a rotating, preferably disc-shaped tool, with a machine housing having a flange or a machine neck on which a protective hood, in particular made of sheet metal, for covering the tool is releasably clamped, wherein the protective cover a Protective hood body has, which consists of a circular disk-shaped piece, in particular with an angled outer edge and has a central circular recess, at the edge of a protective hood or -kragen is formed, which carries a clamping band in an annular manner, which is contractible by means of a clamping means and wherein an acting between machine neck and protective rotation between guard and machine neck is arranged in the form of a profiling, wherein the protective cover on the clamping band and / or on the clamping means in its clamping position repeatedly positively and / or non-positively coupled with the machine neck and thus rotatable and can be brought to reach a release position except positive engagement and / or adhesion to the machine neck, the guard is then rotatable.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
eine Explosionsdarstellung einer Handwerkzeugmaschine mit einer erfindungsgemäßen Schutzhaubensicherungsvorrichtung,
Fig. 2
die Schutzhaubensicherungsvorrichtung in einer perspektivischen Darstellung,
Fig. 3
die Schutzhaubensicherungsvorrichtung in einer Schnittdarstellung und
Fig. 4
eine zu Figur 3 alternative Ausgestaltung der Schutzhaubensicherungsvorrichtung in einer Schnittdarstellung.
Show it:
Fig. 1
an exploded view of a hand tool with a protective hood device according to the invention,
Fig. 2
the protective hood securing device in a perspective view,
Fig. 3
the guard locking device in a sectional view and
Fig. 4
one too FIG. 3 Alternative embodiment of the protective hood locking device in a sectional view.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Figur 1 ist ein Handwerkzeugmaschinensystem 40 mit einer von einer Winkelschleifmaschine gebildeten und hier nur teilweise dargestellten Handwerkzeugmaschine 12 und einer Schutzhaubensicherungsvorrichtung 10 mit einer Schutzhaubeneinheit 14 dargestellt. Die Handwerkzeugmaschine 12 weist ein Handwerkzeugmaschinengehäuse 42 und zur Aufnahme der Schutzhaubeneinheit 14 bzw. eines von einer Trennscheibe gebildeten Werkzeugs 22 eine Aufnahmeeinheit 44 auf, die mit dem Handwerkzeugmaschinengehäuse 42 verschraubt ist. Aus der Aufnahmeeinheit 44 ragt an einer dem Handwerkzeugmaschinengehäuse 42 abgewandten Seite 46 eine Antriebswelle 48 heraus, die an ihrem freien Ende 50 mit dem scheibenförmigen Werkzeug 22 verbindbar ist und um eine Achse 52 rotierend antreibbar ist. Die Schutzhaubeneinheit 14 umfasst eine Schutzhaube 16 und eine Verschlusseinheit 88. Die Schutzhaube 16 deckt in einem montierten Zustand des Handwerkzeugmaschinensystems 40 einen Winkelbereich des Werkzeugs 22 von ca. 180° ab und weist hierzu einen halbscheibenförmigen Schutzhaubenkörper 54 und einen Schutzhaubenrand 56 auf, der zunächst senkrecht zum halbscheibenförmigen Schutzhaubenkörper 54 und anschließend parallel zum halbscheibenförmigen Schutzhaubenkörper 54 in eine radiale Richtung 58 nach innen ausgerichtet ist.In FIG. 1 is a hand tool machine system 40 with an angle grinder formed and shown only partially hand tool 12 and a protective hood device 10 with a protective hood unit 14. The hand tool 12 comprises a hand tool housing 42 and a receiving unit 44 for receiving the guard unit 14 or a tool 22 formed by a cutting disc, which is bolted to the power tool housing 42. From the receiving unit 44 protrudes on a side facing away from the power tool housing 42 side 46, a drive shaft 48 which is connectable at its free end 50 with the disc-shaped tool 22 and is rotatably driven about an axis 52. The protective hood unit 14 comprises a protective hood 16 and a locking unit 88. The protective hood 16 covers an angular range of the tool 22 of approximately 180 ° in an assembled state of the hand-held power tool system 40 and has for this purpose a semi-disc-shaped protective hood body 54 and a guard edge 56 which is initially vertical is aligned to the half-disc-shaped guard body 54 and then parallel to the half-disc-shaped guard body 54 in a radial direction 58 inwardly.

Die Schutzhaubensicherungsvorrichtung 10 weist neben der Schutzhaubeneinheit 14 eine Sicherungseinheit 18 mit einem Sicherungselement 20 auf, das zusammen mit der Schutzhaubeneinheit 14 bzw. deren Schutzhaube 16 zu einem Schutz im Falle eines berstenden Werkzeugs 22 vorgesehen ist. Das Sicherungselement 20 ist von einer zur Schutzhaube 16 zusätzlichen Schutzabdeckung 24 gebildet und deckt einen Winkelbereich von ca. 180° des Werkzeugs 22 ab. Die Schutzabdeckung 24 ist an der Schutzhaube 16 gelagert und weist hierzu eine Form bzw. eine Kontur der Schutzhaube 16 auf. Die Schutzhaube 16 weist einen Aufnahmebereich 38 zur Aufnahme des Werkzeugs 22 auf, wobei die Schutzabdeckung 24 innerhalb des Aufnahmebereichs 38 bzw. an einer dem Werkzeug 22 zugewandten Seite 26 des Aufnahmebereichs 38 an der Schutzhaube 16 gelagert ist, so dass die Schutzhaube 16 hierbei eine Außenhülle für die Schutzabdeckung 24 bzw. die Schutzabdeckung 24 eine Innenhülle für die Schutzhaube 16 bildet. In einer Ruheposition bzw. in einer Position in einem regulären Betrieb der Handwerkzeugmaschine 12 ist die Schutzabdeckung 24 in einer nahezu vollständigen Überdeckung mit der Schutzhaube 16 an dieser angeordnet (Figuren 1 und 2).The protective hood device 10 has, in addition to the protective hood unit 14, a securing unit 18 with a securing element 20, which is provided together with the protective hood unit 14 or its protective hood 16 for protection in the case of a bursting tool 22. The securing element 20 is formed by an additional protective cover 24 for the protective cover 16 and covers an angular range of approximately 180 ° of the tool 22. The protective cover 24 is mounted on the protective cover 16 and for this purpose has a shape or a contour of the protective hood 16. The protective hood 16 has a receiving area 38 for receiving the tool 22, wherein the protective cover 24 is mounted on the protective hood 16 within the receiving area 38 or on a side 26 of the receiving area 38 facing the tool 22, so that the protective hood 16 in this case has an outer envelope for the protective cover 24 and the protective cover 24 forms an inner shell for the protective cover 16. In a rest position or in a position in a regular operation of the power tool 12, the protective cover 24 is arranged in an almost complete coverage with the protective cover 16 thereon ( FIGS. 1 and 2 ).

Des Weiteren ist die Schutzabdeckung 24 bewegbar an der Schutzhaube 16 gelagert, so dass die Schutzabdeckung 24 im Falle eines berstenden Werkzeugs 22 einen Impuls eines auf die Schutzhaubeneinheit 14 bzw. auf die Schutzabdeckung 24 treffenden Werkzeugteils des geborstenen Werkzeugs 22 aufnehmen kann und mittels des Impulses in eine Sicherungsposition bewegbar ist. Hierzu weist die Schutzhaubeneinheit 14 bzw. die Schutzhaube 16 einen Schutzhaubenkragen 30 auf, der einen Aufnahmebereich 32 zur Aufnahme der Handwerkzeugmaschine 12 bzw. der Aufnahmeeinheit 44 in eine Umfangsrichtung 34, 36 um 360° ummantelt (Figur 1 und 2). Die Umfangsrichtung 34, 36 ist dabei um die Achse 52 der Antriebswelle 48 umlaufend und im Wesentlichen senkrecht zu dieser ausgerichtet. Der Schutzhaubenkragen 30 ist entlang der Achse 52 gestuft ausgebildet und weist in einem dem Werkzeug 22 bzw. dem Aufnahmebereich 38 für das Werkzeug 22 zugewandten Teilbereich 60 eine größere Querschnittsfläche auf als eine Querschnittsfläche in einem dem Werkzeug 22 bzw. dem Aufnahmebereich 38 für das Werkzeug 22 abgewandten Teilbereich 62 (vgl. Figur 3). Der Teilbereich 60 mit der größeren Querschnittsfläche weist an einer dem Aufnahmebereich 32 für die Handwerkzeugmaschine 12 zugewandten Seite 64 ein Führungselement 28 der Schutzhaubensicherungsvorrichtung 14 auf, das einstückig mit dem Schutzhaubenkragen 30 ausgebildet ist. Das Führungselement 28 ist zu einer bewegbaren Lagerung der Schutzabdeckung 24 in der Schutzhaubeneinheit 14 vorgesehen und von einer umlaufenden, sich in eine radiale Richtung 58 nach außen erstreckende Führungsnut gebildet. Die Schutzabdeckung 24 ist um die Achse 52 der Antriebswelle 48 verdrehbar gegen die Schutzhaube 16 angeordnet und weist hierzu von jeweils einem Führungssteg 66 gebildete Führungselemente auf, die in der Führungsnut gelagert sind, wobei in Figur 3 nur ein Führungssteg 66 zu sehen ist. Hierdurch ist die Schutzabdeckung 24 gegen ein unerwünschtes Herausfallen aus der Schutzhaubeneinheit 14 bei einer Bewegung in eine Sicherungsposition und/oder während eines Betriebs der Handwerkzeugmaschine 12 gesichert.Furthermore, the protective cover 24 is movably mounted on the protective cover 16, so that the protective cover 24 in the case of a bursting tool 22 can receive a pulse of the protective hood unit 14 and the protective cover 24 striking tool part of the ruptured tool 22 and by means of the pulse in a securing position is movable. For this purpose, the protective hood unit 14 or the protective hood 16 has a protective hood collar 30, which encloses a receiving region 32 for receiving the handheld power tool 12 or the receiving unit 44 in a circumferential direction 34, 36 by 360 ° ( FIG. 1 and 2 ). The circumferential direction 34, 36 is circumferentially around the axis 52 of the drive shaft 48 and substantially aligned perpendicular to this. The protective hood collar 30 is designed to be stepped along the axis 52 and, in a partial region 60 facing the tool 22 or the receiving region 38 for the tool 22, has a larger cross-sectional area than a cross-sectional surface in a tool 22 or the receiving region 38 for the tool 22 remote portion 62 (see. FIG. 3 ). The partial area 60 with the larger cross-sectional area has, on a side 64 facing the receiving area 32 for the handheld power tool 12, a guide element 28 of the protective hood locking device 14, which is formed integrally with the protective hood collar 30. The guide element 28 is provided for a movable mounting of the protective cover 24 in the protective hood unit 14 and formed by a circumferential, extending in a radial direction 58 outwardly extending guide. The protective cover 24 is arranged rotatably about the axis 52 of the drive shaft 48 against the protective cover 16 and has for this purpose on each of a guide web 66 formed guide elements which are mounted in the guide groove, wherein in FIG. 3 only one guide bar 66 can be seen. As a result, the protective cover 24 is secured against undesired falling out of the protective hood unit 14 during a movement into a securing position and / or during operation of the power tool 12.

Zur Sicherung der Schutzabdeckung 24 in einem regulären Betrieb in einer Ruheposition bzw. in einer Position mit einer nahezu kompletten Überdeckung mit der Schutzhaube 16 weist die Schutzhaubensicherungsvorrichtung 10 eine nicht näher dargestellte Sicherungseinheit auf, die ein unerwünschtes Bewegen der Schutzabdeckung 24 in die Sicherungsposition im regulären Betrieb der Handwerkzeugmaschine 12 verhindert. Die Sicherungseinheit lässt abhängig von einem auf die Schutzabdeckung 24 übertragenen Impuls eine Bewegung der Schutzabdeckung 24 in eine Rotationsrichtung 68 des Werkzeugs 22 zu. Trifft im Falle eines berstenden Werkzeugs 22 ein nach außen geschleudertes Werkzeugteil auf die Schutzhaubeneinheit 14 bzw. auf die Schutzabdeckung 24, übersteigt ein auf die Schutzabdeckung 24 übertragener Impuls eine Sicherungskraft der Sicherungseinheit 18 und die Schutzabdeckung 24 wird in Rotationsrichtung 68 aus ihrer Ruheposition heraus in die Schutzposition gedreht.To secure the protective cover 24 in a regular operation in a rest position or in a position with a nearly complete coverage with the guard 16, the guard locking device 10 has a fuse unit, not shown, the undesirable movement of the protective cover 24 in the backup position in regular operation prevents the power tool 12. The fuse unit allows movement of the protective cover 24 in a direction of rotation 68 of the tool 22, depending on a pulse transmitted to the protective cover 24. If, in the case of a bursting tool 22, an outwardly thrown tool part strikes the guard unit 14, a pulse transmitted to the guard 24 exceeds a securing force of the securing unit 18 and the guard 24 moves in the direction of rotation 68 from its rest position to the guard Protection position turned.

In einer Sicherungsposition der Schutzabdeckung 24 zusammen mit der Schutzhaube 16 decken die Schutzabdeckung 24 und die Schutzhaube 16 einen kompletten Winkelbereich des Aufnahmebereichs 38 des Werkzeugs 22 von 360° ab. Um eine weitere Drehung der Schutzabdeckung 24 in der Sicherungsposition in Rotationsrichtung 68 des Werkzeugs 22 zu verhindern, weist die Schutzhaubensicherungsvorrichtung 10 eine Stoppeinheit 70 auf, die eine Drehung der Schutzabdeckung 24 in Rotationsrichtung 68 nach Erreichen der Sicherungsposition beendet. Die Stoppeinheit 70 weist zwei von jeweils einem Rastelement 72, 74 gebildete Stoppelemente auf, wobei eines an einer radial nach innen gerichteten Seite 76 des Schutzhaubenrands 56 und eines an einer dem Schutzhaubenrand 56 zugewandten Seite 78 der Schutzabdeckung 24 angeordnet ist. Zudem weist der Schutzhaubenrand 56 in Rotationsrichtung 68 nach dem Rastelement 72 ein Anschlagelement 80 auf, wobei das Anschlagelement 80 und das Rastelement 72 an einem entgegen der Rotationsrichtung 68 weisenden Randbereich 82 des Schutzhaubenrands 56 angeordnet sind. Das Rastelement 74 der Schutzabdeckung 24 ist an einem in Rotationsrichtung 68 weisenden Randbereich 84 angeordnet. Mittels des Anschlagelements 80 wird eine Drehbewegung der Schutzabdeckung 24 in Rotationsrichtung 68 gestoppt und mittels der beiden Rastelemente 72, 74 eine Drehung aufgrund eines Rückimpulses zurück in die Ruheposition verhindert.In a securing position of the protective cover 24 together with the protective cover 16, the protective cover 24 and the protective cover 16 cover a complete angular range of the receiving region 38 of the tool 22 from 360 °. In order to prevent further rotation of the protective cover 24 in the securing position in the direction of rotation 68 of the tool 22, the protective hood securing device 10 has a stop unit 70 which permits rotation of the protective cover 24 ended in the direction of rotation 68 after reaching the securing position. The stop unit 70 has two stop elements formed by a respective latching element 72, 74, wherein one is arranged on a radially inwardly directed side 76 of the protective hood rim 56 and on a side 78 of the protective cover 24 facing the protective hood edge 56. In addition, the protective hood edge 56 has a stop element 80 in the direction of rotation 68 after the latching element 72, wherein the stop element 80 and the latching element 72 are arranged on an edge region 82 of the protective hood edge 56 pointing opposite to the direction of rotation 68. The latching element 74 of the protective cover 24 is arranged on an edge region 84 pointing in the direction of rotation 68. By means of the stop element 80, a rotational movement of the protective cover 24 is stopped in the direction of rotation 68 and by means of the two latching elements 72, 74 prevents rotation due to a return pulse back into the rest position.

Der Teilbereich 62 des Schutzhaubenkragens 30 mit der kleineren Querschnittsfläche ist in radialer Richtung 58 nach außen von einem Spannband 86 der Verschlusseinheit 88 umgeben, wobei der Schutzhaubenkragen 30 und das Spannband 86 miteinander mittels einer Schweißverbindung verbunden sind (Figuren 1 bis 3). Zusammen mit dem Spannband 86 ist der Schutzhaubenkragen 30 zur Befestigung der Schutzhaubeneinheit 14 an der Handwerkzeugmaschine 12 bzw. an der Aufnahmeeinheit 44 vorgesehen, die hierzu einen zylinderförmigen Aufnahmeflansch 90 aufweist. Zudem ist der Teilbereich 62 mit der kleineren Querschnittsfläche entlang der Achse 52 der Antriebswelle 48 geschlitzt ausgeführt, so dass mittels des Spannbands 86 eine Querschnittsfläche zur Erzielung des Kraftschlusses zwischen dem Schutzhaubenkragen 30 an dem Aufnahmeflansch 90 wirksam verkleinert werden kann. Zudem weist das Spannband 86 zwei Endbereiche 92, 94 auf, die sich in radialer Richtung 58 nach außen erstrecken. Die beiden Endbereiche 92, 94 weisen jeweils eine Ausnehmung 96 auf, durch die ein nicht näher dargestelltes und von einer Spannschraube gebildetes Verschlusselement der Verschlusseinheit 88 greift (vgl. Figur 1). Die Schutzhaube 16 wird mittels der Verschlusseinheit 88 an der Aufnahmeeinheit 44 bzw. an dem Aufnahmeflansch 90 aufgrund eines Reibschlusses zwischen dem Schutzhaubenkragen 30 bzw. dem Spannband 86 und dem Aufnahmeflansch 90 in einer Arbeitposition befestigt. Grundsätzlich ist es in einer alternativen Ausgestaltung der Verschlusseinheit 88 jederzeit denkbar, anstatt der Spannschraube weitere Verschlusselemente, wie beispielsweise einen Spannhebel und/oder Formschlusselemente usw. zu verwenden.The partial region 62 of the protective collar 30 with the smaller cross-sectional area is surrounded in the radial direction 58 to the outside by a tension band 86 of the closure unit 88, wherein the protective collar collar 30 and the tension band 86 are connected to one another by means of a welded connection (FIG. FIGS. 1 to 3 ). Together with the clamping band 86, the protective hood collar 30 is provided for fastening the protective hood unit 14 to the handheld power tool 12 or to the receiving unit 44, which has a cylindrical receiving flange 90 for this purpose. In addition, the partial region 62 with the smaller cross-sectional area along the axis 52 of the drive shaft 48 is designed to be slotted so that a cross-sectional area for achieving the frictional connection between the protective hood collar 30 on the receiving flange 90 can be effectively reduced by means of the tension band 86. In addition, the tension band 86 has two end regions 92, 94, which extend in the radial direction 58 to the outside. The two end regions 92, 94 each have a recess 96 through which engages a closure element of the closure unit 88 (not shown) and formed by a clamping screw (cf. FIG. 1 ). The protective hood 16 is fastened by means of the closure unit 88 to the receiving unit 44 or to the receiving flange 90 due to a frictional connection between the protective hood collar 30 or the clamping band 86 and the receiving flange 90 in a working position. In principle, in an alternative embodiment of the closure unit 88, it is always conceivable to use further closure elements, such as, for example, a tensioning lever and / or form-locking elements, etc., instead of the tensioning screw.

In Figur 4 ist eine alternative Ausgestaltung der Schutzhaubensicherungsvorrichtung 10 mit einer Schutzhaubeneinheit 14 dargestellt. Die Schutzhaubeneinheit 14 weist eine Schutzhaube 16 mit einem Schutzhaubenkragen 30 auf, der entlang einer Achse einer Antriebswelle eine gleich bleibende Querschnittsfläche aufweist. An einer einem Aufnahmebereich 38 eines Werkzeugs zugewandten Seite 98 weist die Schutzhaube 16 ein Führungselement 28 auf, das zu einer Führung einer Schutzabdeckung 24 einer Sicherungseinheit 18 dient. Das Führungselement 28 ist an einem dem Aufnahmebereich 38 zugewandten Randbereich 100 eines Schutzhaubenkörpers 54 der Schutzhaube 16 angeordnet und erstreckt sich entlang der Achse der Antriebswelle. Zudem ist das Führungselement 28 ringartig ausgebildet und weist an einer in radialer Richtung 58 nach außen weisenden Seite 102 eine Führungsnut 104 auf, in der die Schutzabdeckung 24 bewegbar gelagert ist bzw. ein Führungselement 106 der Schutzabdeckung 24 geführt ist. Das Führungselement 106 und die Führungsnut 104 sind L-förmig ausgebildet, so dass die Schutzabdeckung 24 bei einer Drehung in eine Sicherungsposition bzw. in einem Betrieb einer Handwerkzeugmaschine gegen ein Herausfallen gesichert ist.In FIG. 4 an alternative embodiment of the protective hood device 10 is shown with a protective hood unit 14. The protective hood unit 14 has a protective hood 16 a protective hood collar 30, which has a constant cross-sectional area along an axis of a drive shaft. On a side facing a receiving region 38 of a tool 98, the protective hood 16 has a guide element 28 which serves to guide a protective cover 24 of a securing unit 18. The guide element 28 is arranged on a receiving region 38 facing edge region 100 of a guard body 54 of the protective cover 16 and extends along the axis of the drive shaft. In addition, the guide element 28 is annular and has a guide groove 104 on a radially outward-facing side 102, in which the protective cover 24 is movably mounted or a guide element 106 of the protective cover 24 is guided. The guide member 106 and the guide groove 104 are formed L-shaped, so that the protective cover 24 is secured against falling out upon rotation into a securing position or in an operation of a power tool.

In einer alternativen und hier nicht näher dargestellten Ausgestaltung der Schutzhaubensicherungsvorrichtung 10 ist es zudem auch denkbar, dass die Sicherungseinheit 18 bzw. die Schutzabdeckung 24 von mehreren Sicherungselementen, die beispielsweise in Umfangsrichtung nacheinander angeordnet sind, und/oder von einem zusammenfaltbaren Sicherungselement gebildet ist, die an der Schutzhaube 16 bewegbar gelagert sind. Die Sicherungselemente bzw. das Sicherungselement können dabei mittels eines Impulses eines auf die Schutzabdeckung 24 treffenden Werkzeugteils eines geborstenen Werkzeugs 22 in die Sicherungsposition gebracht bzw. bewegt werden. Die Sicherungselemente sind zudem vorzugsweise miteinander mittels jeweils eines Mitnahmeelements verbunden, so dass bei einem Impulsübertrag von einem auf ein Sicherungselement treffenden Werkzeugteils eines geborstenen Werkzeugs 22 sämtliche Sicherungselemente der Sicherungseinheit 18 in die Sicherungsposition gebracht bzw. bewegt werden können.In an alternative embodiment of the protective hood securing device 10, which is not illustrated here, it is also conceivable for the securing unit 18 or the protective cover 24 to be formed by a plurality of securing elements, which are arranged successively in the circumferential direction, for example, and / or by a collapsible securing element are mounted movably on the protective hood 16. The securing elements or the securing element can be brought or moved by means of a pulse of a hit on the protective cover 24 tool part of a broken tool 22 in the securing position or moved. The securing elements are also preferably connected to each other by means of a respective driving element, so that all fuse elements of the securing unit 18 can be brought into the securing position or moved during a momentum transfer from a striking a fuse element tool part of a ruptured tool 22.

Claims (12)

  1. Protective hood securing device for a portable power tool (12), in particular for an angle grinder, having a protective hood unit (14) which has a protective hood (16), wherein the protective hood (16) is able to be coupled to a machine neck of a portable power tool (12) in a form-fitting and/or force-fitting manner and is securable thereto in a rotationally fixed manner, and having a securing unit (18) with at least one securing element (20) which, together with the protective hood unit (14), is provided for protection in the event of a shattering tool (22), wherein the securing element (20) is formed at least partially by a protective cover (24) in addition to the protective hood (16), characterized in that the protective cover (24) is mounted at least partially on the protective hood (16) and is arranged so as to be rotatable at least partially with respect to the protective hood (16).
  2. Protective hood securing device according to Claim 1, characterized in that the protective cover (24) covers an angular range of a tool (22) of at least 90°.
  3. Protective hood securing device according to either of the preceding claims, characterized in that the protective cover (24) covers an angular range of a tool (22) of essentially 180°.
  4. Protective hood securing device according to one of the preceding claims, characterized in that the protective cover (24) is arranged at least partially on a side (26) of the protective hood (16) that faces a tool (22).
  5. Protective hood securing device one of the preceding claims, characterized by at least one guide element (28) which is provided for mounting the protective cover (24) in a movable manner.
  6. Protective hood securing device according to Claim 5, characterized in that the guide element (28) is formed at least partially in one piece with the protective hood unit (14).
  7. Protective hood securing device according to one of the preceding claims, characterized in that the protective hood unit (14) has a protective hood collar (30) which surrounds a receiving region (32) for a portable power tool (12) through at least 270° in a circumferential direction (34, 36).
  8. Protective hood securing device according to Claim 7, characterized in that the protective hood collar (30) is formed at least partially by the guide element (28).
  9. Protective hood securing device according to Claim 7, characterized in that the protective hood collar (30) is formed in an at least partially stepped manner.
  10. Protective hood securing device according to one of the preceding claims, characterized in that the protective hood (16) has a receiving region (38) for a tool (22) and the protective cover (24), together with the protective hood (16), covers an angular range of the receiving region (38) of at least 235° in a securing position.
  11. Protective hood securing device according to one of the preceding claims, characterized in that the protective hood (16) has a receiving region (38) for a tool (22) and the protective cover (24), together with the protective hood (16), covers an angular range of the receiving region (38) of at least 270° in a securing position.
  12. Protective hood securing device according to one of the preceding claims, characterized in that the protective hood (16) has a receiving region (38) for a tool (22) and the protective cover (24), together with the protective hood (16), covers an angular range of the receiving region (38) of essentially 360° in a securing position.
EP07822409.4A 2006-11-13 2007-11-09 Protective hood securing device Active EP2106326B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610053305 DE102006053305A1 (en) 2006-11-13 2006-11-13 Hand tool with protective hood, in particular angle grinder
PCT/EP2007/062108 WO2008058901A1 (en) 2006-11-13 2007-11-09 Protective hood securing device

Publications (2)

Publication Number Publication Date
EP2106326A1 EP2106326A1 (en) 2009-10-07
EP2106326B1 true EP2106326B1 (en) 2017-01-11

Family

ID=39004838

Family Applications (5)

Application Number Title Priority Date Filing Date
EP07822409.4A Active EP2106326B1 (en) 2006-11-13 2007-11-09 Protective hood securing device
EP07822405.2A Active EP2104590B1 (en) 2006-11-13 2007-11-09 Protective hood anti-rotation lock
EP20070822417 Not-in-force EP2106321B1 (en) 2006-11-13 2007-11-09 Protective hood anti-rotation lock
EP07822425.0A Active EP2106323B1 (en) 2006-11-13 2007-11-09 Portable power tool system
EP20070822423 Active EP2106322B1 (en) 2006-11-13 2007-11-09 Protective hood anti-rotation lock

Family Applications After (4)

Application Number Title Priority Date Filing Date
EP07822405.2A Active EP2104590B1 (en) 2006-11-13 2007-11-09 Protective hood anti-rotation lock
EP20070822417 Not-in-force EP2106321B1 (en) 2006-11-13 2007-11-09 Protective hood anti-rotation lock
EP07822425.0A Active EP2106323B1 (en) 2006-11-13 2007-11-09 Portable power tool system
EP20070822423 Active EP2106322B1 (en) 2006-11-13 2007-11-09 Protective hood anti-rotation lock

Country Status (6)

Country Link
US (7) US8465348B2 (en)
EP (5) EP2106326B1 (en)
CN (5) CN101535002B (en)
DE (1) DE102006053305A1 (en)
RU (5) RU2465117C2 (en)
WO (5) WO2008058909A1 (en)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006053305A1 (en) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Hand tool with protective hood, in particular angle grinder
DE102007052684A1 (en) * 2007-11-05 2009-05-07 Robert Bosch Gmbh Hand tool
DE102009017299A1 (en) * 2009-04-11 2010-10-21 Metabowerke Gmbh Protective cover for electric hand tools and electric hand tool
JP2010274404A (en) * 2009-06-01 2010-12-09 Makita Corp Fixture fall preventing structure for grinding wheel cover in disc grinder
DE102009048357A1 (en) * 2009-10-06 2011-04-21 Metabowerke Gmbh Electric hand tool
JP5544867B2 (en) * 2009-12-21 2014-07-09 日立工機株式会社 Grinder
JP5587079B2 (en) * 2010-07-22 2014-09-10 株式会社マキタ Movable cover mounting structure and cutting machine
JP5684056B2 (en) * 2010-08-16 2015-03-11 株式会社マキタ Hand tool
JP5579575B2 (en) * 2010-11-02 2014-08-27 株式会社マキタ Disc grinder
US9120202B2 (en) 2011-06-30 2015-09-01 Black & Decker Inc. Shield assembly for a power tool
JP5959421B2 (en) * 2011-12-14 2016-08-02 株式会社マキタ Grinder
DE102011089754A1 (en) 2011-12-23 2013-06-27 Robert Bosch Gmbh Guard anti
DE102011089758A1 (en) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Guard anti
DE102012210767A1 (en) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Guard device
DE102012210766A1 (en) * 2012-06-25 2014-01-02 Robert Bosch Gmbh system
DE102012210771A1 (en) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Guard device
US8939816B2 (en) * 2012-07-02 2015-01-27 Sunmatch Industrial Co., Ltd. Handheld pneumatic grinder with adjustable wheel guard structure
DE102012214834A1 (en) * 2012-08-21 2014-02-27 Robert Bosch Gmbh Guard device
US10011009B2 (en) * 2013-11-01 2018-07-03 Robert Bosch Tool Corporation Guide foot for an oscillating power tool
US9475172B2 (en) 2014-07-15 2016-10-25 Milwaukee Electric Tool Corporation Adjustable guard for power tool
USD744800S1 (en) 2014-07-16 2015-12-08 Milwaukee Electric Tool Corporation Power tool blade guard
US10201889B2 (en) * 2014-08-06 2019-02-12 Sparky Guard, LLC Fully rotatable grinder guard assembly and method for making same
CN104568427A (en) * 2014-11-18 2015-04-29 中国航空动力机械研究所 Conical gear shaft twisting-stopping simulation structure device and application
EP3081335B1 (en) * 2015-04-13 2020-02-19 Black & Decker Inc. Guard assembly for a power tool
US11338426B2 (en) 2015-11-02 2022-05-24 Black & Decker, Inc. Cordless power cutter
USD800456S1 (en) 2016-03-04 2017-10-24 The Libman Company Brush handle
CA2959779C (en) 2016-03-04 2019-06-11 The Libman Company Scissor-style toilet brush
EP3251791B1 (en) 2016-05-06 2019-03-27 Black & Decker Inc. Reversible lever for a guard assembly for a power tool
EP3300839A1 (en) * 2016-09-28 2018-04-04 Hilti Aktiengesellschaft Dust hood for a grinding machine
DE102016220343A1 (en) 2016-10-18 2018-04-19 Robert Bosch Gmbh Quick-clamping device for a portable power tool having at least one output shaft which can be driven in rotation, in particular an angle grinder
TWI611865B (en) * 2017-02-23 2018-01-21 Safety cover for grinder
DE102017213746A1 (en) * 2017-08-08 2019-02-14 Robert Bosch Gmbh Protective device for a hand tool machine
CN107553416B (en) * 2017-10-25 2024-03-15 锐奇控股股份有限公司 Electric tool protection casing adjusting device and electric tool
US11077535B2 (en) 2018-02-14 2021-08-03 Samsung Electronics Co., Ltd. Process system having locking pin and locking pin
DE102018203179A1 (en) * 2018-03-02 2019-09-05 Robert Bosch Gmbh Device, in particular handheld power tool management device, and method for monitoring and / or managing a plurality of objects
EP3546124A1 (en) * 2018-03-29 2019-10-02 HILTI Aktiengesellschaft Angle grinder
CN110052933B (en) * 2018-06-05 2021-04-13 弗兰克温特 Grinding disc assembling and locking system containing glass fiber and angle grinder
JP7110025B2 (en) * 2018-08-07 2022-08-01 株式会社マキタ Electric tool
CN112739497B (en) * 2018-09-14 2023-05-12 株式会社牧田 Tool for cutting tools
CN111791129B (en) * 2019-04-03 2023-04-21 南京泉峰科技有限公司 Multifunctional electric tool
US11685017B2 (en) 2020-02-07 2023-06-27 West Bufkin Industries, Llc Storage shield for angle grinding disc
DE202020101891U1 (en) 2020-04-06 2021-07-12 C. & E. Fein Gmbh Power tool
WO2024119256A1 (en) * 2022-12-06 2024-06-13 Irani Papel E Embalagem S.A. Cutting device for a mechanical resin applicator

Family Cites Families (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384243A (en) * 1944-02-16 1945-09-04 Flohr Andrew Guard for emery wheels and the like
US2819570A (en) * 1957-01-10 1958-01-14 Berne Tocci Guilbert Safety device for grinding machines
US2922261A (en) * 1957-04-24 1960-01-26 Samuel J Rabkin Apparatus for removing surface coatings
US3068620A (en) * 1961-02-06 1962-12-18 Tocci-Guilbert Berne Safety guard for grinding machine
DE7028588U (en) * 1970-07-29 1970-12-17 Fritz Jetzt Fa PROTECTIVE DEVICE FOR THE CUT-OFF DISC OF A MANUAL CUT-OFF MACHINE.
SU495192A1 (en) * 1973-04-11 1975-12-15 В Есоюзный Научно-Исследовательский Институт По Монтажным И Специальным Строительным Работам Manual machine
US4060940A (en) * 1976-01-13 1977-12-06 The Black And Decker Manufacturing Company Adjustable guard construction for cut-off machine
SU1121131A1 (en) 1978-11-09 1984-10-30 Предприятие П/Я Г-4572 Protective guard for rotors of machines working with shot
CS222119B1 (en) 1981-03-10 1983-04-29 Borivoj Prazsky Protective cover of the grinding disc
DE3338917A1 (en) * 1983-10-27 1985-05-09 C. & E. Fein Gmbh & Co, 7000 Stuttgart PROTECTIVE HOOD FASTENING FOR PORTABLE ANGLE GRINDERS
SE443532B (en) 1985-02-25 1986-03-03 Kaj Mickos REMOVABLE PROTECTION FOR CRAFT CRAFTS, ROTABLE TOOLS
DE3636601A1 (en) * 1986-10-28 1988-05-05 Bosch Gmbh Robert PROTECTIVE COVER FOR GRINDING MACHINES, ESPECIALLY ANGLE GRINDERS, AND THE FASTENING MOUNTING THAT MATCH THEM
US4791541A (en) * 1987-08-28 1988-12-13 Mc Gill Manufacturing Company, Inc. Protective cage for a lamp
SU1611615A1 (en) 1987-10-13 1990-12-07 Всесоюзный Научно-Исследовательский Инструментальный Институт Chuck for securing screw taps
DE3742430A1 (en) 1987-12-15 1989-06-29 Waldmann Mechthild Tool-clamping device for hand-held angle grinding machine (angle grinder)
DE3744219A1 (en) * 1987-12-24 1989-07-06 Fein C & E HAND GRINDING MACHINE WITH ADJUSTABLE PROTECTIVE COVER
DE3940584A1 (en) * 1989-12-08 1991-06-13 Bosch Gmbh Robert Adjustable guard for portable grinder - has encircling metal band with tensioning lever to clamp rim of guard onto neck of grinder
CN2080440U (en) 1990-06-14 1991-07-10 姜会仁 Safety dust-catching grinding wheel
DE9010138U1 (en) 1990-07-04 1990-09-13 Hu, Cheng Te, Kuan Tien Hsiang, Tainan Multifunctional power tool
RU2032520C1 (en) 1990-10-01 1995-04-10 Казанский Авиационный Институт Им.А.Н.Туполева Polishing manually-operated machine
US5537748A (en) * 1991-07-09 1996-07-23 Ryobi Limited Cover structure for electric circular saw
US5167215A (en) * 1991-10-11 1992-12-01 Equipment Development Co., Inc. Dust removal apparatus for a concrete saw
US5440815A (en) * 1992-04-13 1995-08-15 Inkster; Kevin R. Guide for rotary cutter tools
SE9201990L (en) * 1992-06-29 1993-12-30 Atlas Copco Tools Ab Pneumatic rotary grinder
US5545082A (en) * 1994-05-02 1996-08-13 Courson; Michael W. Dust control system for rotary hand tools
DE4422247A1 (en) * 1994-06-24 1996-01-04 Fraunhofer Ges Forschung Guide and handle for hand=held appliance
DE29601002U1 (en) 1996-01-20 1997-05-15 Robert Bosch Gmbh, 70469 Stuttgart Electric hand machine tool
SE507264C2 (en) * 1996-06-13 1998-05-04 Atlas Copco Tools Ab Handheld power tool
DE19834839C2 (en) * 1998-08-01 2002-04-11 C & E Fein Gmbh & Co Kg Grinder with a removable protective hood
RU2152862C2 (en) * 1998-08-10 2000-07-20 Закрытое Акционерное Общество "Энерпред" Hand-grinding machine
DE10000701A1 (en) * 2000-01-10 2001-07-12 Bosch Gmbh Robert Angle grinder protection hood
CN1124185C (en) * 2000-01-27 2003-10-15 宁波经济技术开发区中强电动工具有限公司 Automatic locking unit of guard hood for bench of combined saw
US6464573B1 (en) * 2000-06-30 2002-10-15 Porter-Cable Corporation Guard attachment system with knurled clamp ring
WO2002070201A1 (en) 2001-03-07 2002-09-12 Sparky Eltos Safety guard for angle grinders
DE10115635C1 (en) 2001-03-23 2002-10-24 Flex Elektrowerkzeuge Gmbh Protective hood for grinding wheel set at right-angles to axis of hand tool is shaped as semicircle and covers arc of circle under motor and has ratchet system to help hold it in place
JP3983997B2 (en) * 2001-04-26 2007-09-26 株式会社マキタ Marnoco
DE10124439A1 (en) * 2001-05-18 2002-11-21 Bosch Gmbh Robert Protective hood of an electric angle grinder has an expanding clamp band held around a shaped housing collar about which it may be turned and clamped
DE10158334C1 (en) 2001-11-28 2003-02-20 Metabowerke Gmbh Electric angle grinder has protective hood adjusted relative to spindle neck of angle grinder via releasable cam mechanism
US6893334B1 (en) * 2002-01-24 2005-05-17 J. David Stivers Rotating guard for angle grinder
US6699114B1 (en) * 2002-04-26 2004-03-02 Benedict Engineering Company, Inc. Pivotal guards for power hand tools with rotating discs
CN2557286Y (en) * 2002-07-30 2003-06-25 阿特拉斯·科普柯长春电动工具有限公司 Universal directional grinding machine
DE10259520A1 (en) * 2002-12-19 2004-07-01 Robert Bosch Gmbh Electric hand tool
SE525836C2 (en) 2003-03-31 2005-05-10 Atlas Copco Tools Ab Grinding machine with explosion protection and spindle lock
DE10316182A1 (en) * 2003-04-09 2004-10-28 Robert Bosch Gmbh Hand grinder with protective hood
CN100519064C (en) * 2003-11-05 2009-07-29 胡桂强 Flexible protective cover apparatus of cutter
DE10336873B4 (en) * 2003-08-11 2007-09-20 Hilti Ag Guard assembly
DE10343060A1 (en) * 2003-09-16 2005-04-07 Robert Bosch Gmbh Protective cowl for hand power tool especially for angle grinder has an adjustable fitting with a finger pressure ratchet lever engaging ratchet holes in cowl mounting
DE10346744A1 (en) 2003-10-08 2005-05-12 Kippes Gmbh cutter
DE10348395A1 (en) * 2003-10-17 2005-05-19 Robert Bosch Gmbh Protective cover for a power tool, power tool and system with protective hood and power tool
CN2726843Y (en) * 2004-06-02 2005-09-21 墩丰机械工业股份有限公司 Full sealing type eye protecting cover device of cut-off machine
DE102004034441A1 (en) 2004-07-16 2006-02-16 Narex Česká Lípa a.s. Hand tool, in particular angle grinder
DE102004047278A1 (en) * 2004-09-29 2006-04-06 Hilti Ag Covering device for a tool device
DK176122B1 (en) * 2005-01-21 2006-09-11 Flex Trim As Apparatus, preferably for grinding a floor surface
AU308238S (en) * 2005-09-30 2006-08-01 Bosch Gmbh Robert Protection hood for angle grinder
DE102005061867A1 (en) * 2005-12-23 2007-07-05 Robert Bosch Gmbh Protective hood with clamping device for hand-held tool has turning lock element acting with turn lock counter-element on machine neck of tool
ATE457849T1 (en) * 2006-10-07 2010-03-15 Metabowerke Gmbh HAND-HELD ELECTRIC TOOL, PARTICULARLY AN ANGLE GRINDER WITH A PROTECTIVE HOOD
DE102007041840A1 (en) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Hand tool with protective hood, in particular angle grinder
DE102006053305A1 (en) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Hand tool with protective hood, in particular angle grinder
DE102006053303A1 (en) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Hand tool for a rotating tool with protective cover
DE102006053301A1 (en) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Hand tool for a rotating tool with protective cover

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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CN101534996B (en) 2013-05-08
EP2104590B1 (en) 2016-01-27
WO2008058901A1 (en) 2008-05-22
US20120231710A1 (en) 2012-09-13
EP2106326A1 (en) 2009-10-07
RU2463151C2 (en) 2012-10-10
RU2009122216A (en) 2010-12-20
CN101534998A (en) 2009-09-16
DE102006053305A1 (en) 2008-05-15
RU2466848C2 (en) 2012-11-20
US8454411B2 (en) 2013-06-04
CN101535002A (en) 2009-09-16
CN101534997A (en) 2009-09-16
US8562395B2 (en) 2013-10-22
US20090100885A1 (en) 2009-04-23
RU2009122235A (en) 2010-12-20
EP2106321A1 (en) 2009-10-07
RU2465117C2 (en) 2012-10-27
US8460070B2 (en) 2013-06-11
CN101534996A (en) 2009-09-16
US20090036044A1 (en) 2009-02-05
CN101534998B (en) 2013-12-18
EP2106322A1 (en) 2009-10-07
US20090130961A1 (en) 2009-05-21
RU2465118C2 (en) 2012-10-27
WO2008058900A1 (en) 2008-05-22
EP2106323A1 (en) 2009-10-07
CN101535002B (en) 2014-10-08
US8221197B2 (en) 2012-07-17
US20090098812A1 (en) 2009-04-16
EP2106323B1 (en) 2017-07-26
US20120034855A1 (en) 2012-02-09
WO2008058910A1 (en) 2008-05-22
RU2009122232A (en) 2010-12-20
EP2106321B1 (en) 2013-07-10
EP2104590A1 (en) 2009-09-30
US8465348B2 (en) 2013-06-18
CN101534995A (en) 2009-09-16
WO2008058904A1 (en) 2008-05-22
RU2009122230A (en) 2011-02-20
CN101534997B (en) 2013-06-19
US20090019899A1 (en) 2009-01-22
RU2009122212A (en) 2010-12-20
EP2106322B1 (en) 2014-08-06
WO2008058909A1 (en) 2008-05-22
US8231436B2 (en) 2012-07-31
US7955162B2 (en) 2011-06-07
RU2464150C2 (en) 2012-10-20

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