EP0407337B1 - Hand device with a wheel for cutting-off or grinding - Google Patents

Hand device with a wheel for cutting-off or grinding Download PDF

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Publication number
EP0407337B1
EP0407337B1 EP90810444A EP90810444A EP0407337B1 EP 0407337 B1 EP0407337 B1 EP 0407337B1 EP 90810444 A EP90810444 A EP 90810444A EP 90810444 A EP90810444 A EP 90810444A EP 0407337 B1 EP0407337 B1 EP 0407337B1
Authority
EP
European Patent Office
Prior art keywords
housing
sleeve
receptacle
diameter
protective 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.)
Expired - Lifetime
Application number
EP90810444A
Other languages
German (de)
French (fr)
Other versions
EP0407337A1 (en
Inventor
Manfred Walter
Wolfgang Erdt
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.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to AT90810444T priority Critical patent/ATE91941T1/en
Publication of EP0407337A1 publication Critical patent/EP0407337A1/en
Application granted granted Critical
Publication of EP0407337B1 publication Critical patent/EP0407337B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools

Definitions

  • the invention relates to a hand-held device for driving cutting or grinding disks with a housing and a protective hood which partially surrounds the disc and is releasably connected to the housing, the protective hood having a sleeve-shaped approach which cooperates with the housing for the releasable connection.
  • Hand-held devices of the aforementioned type are provided with a protective hood which partially surrounds the pane, so that the risk of injury is reduced and an uncontrolled throwing away of the material to be processed is prevented.
  • a protective hood which partially surrounds the pane, so that the risk of injury is reduced and an uncontrolled throwing away of the material to be processed is prevented.
  • different parts of the pane must be exposed from the protective hood.
  • the adjusting screw can come into a position, for example, which is hidden by the housing in such a way that it cannot be reached by the tool.
  • the protective hood can therefore not be clamped sufficiently.
  • the present invention has for its object to provide a handheld device of the type mentioned, the protective cover is sufficient in any position and also clamped to the housing without any special tools.
  • the housing has a receptacle which is adjustable in diameter for the sleeve-shaped attachment of the protective hood.
  • the adjustment device By arranging a diameter-adjustable receptacle on the housing of the hand-held device, it is possible to also arrange the adjusting device on the housing. As a result, the adjustment device always takes the same position, regardless of the position of the protective hood. The accessibility is not affected in any position of the protective hood.
  • the receptacle is preferably designed as a slotted sleeve, the circumferential ends of which can be displaced relative to one another in order to adjust the diameter of the receptacle.
  • the circumferential ends of the slotted sleeve can preferably be displaced relative to one another by means of an eccentric lever.
  • an eccentric lever can cooperate, for example, with angled tabs on the peripheral ends of the slotted sleeve, these tabs also being able to accommodate the bearings of such an eccentric lever.
  • the invention will be explained in more detail below on the basis of a drawing, for example, showing it.
  • This shows a hand-held device according to the invention with the protective hood removed, in a perspective view.
  • the hand-held device has a housing 1 with a handle 2 connected to it.
  • a spindle 3 protrudes from the housing 1 for receiving a grinding wheel (not shown).
  • a protective hood 4 partially surrounding the wheel has a sleeve-shaped extension 4a for releasable connection to the housing 1.
  • a receptacle Arranged on the housing 1 is a receptacle which surrounds the spindle 3 and is adjustable in diameter for the sleeve-shaped extension 4a of the protective hood 4.
  • the receptacle is designed as a slotted sleeve 5, the circumferential ends 5a, 5b of which can be displaced relative to one another in order to adjust the diameter of the receptacle.
  • the ends 5a, 5b are angled radially outwards.
  • the sleeve 5 is connected to the housing 1 only over part of its circumference, so that its diameter can be adjusted by pulling the ends 5a, 5b together.
  • the inner diameter of the sleeve 5 is matched to the outer diameter of the extension 4a of the protective hood 4.
  • the angled ends 5a, 5b are penetrated by a bolt 6.
  • a lever 7 is rotatably mounted on the pin 6.
  • the lever 7 has two pins 8 connected to the ends 5a, 5b.
  • the pins 8 reach the area of run-up slopes 5c, 5d at the ends 5a, 5b.
  • the sleeve 5 opens due to its elasticity or a spring element 9 arranged between the angled ends 5a, 5b. This opening or enlarging the diameter of the sleeve 5 removes the clamping of the extension 4a, so that the protective hood 4 is in any position Position can be rotated.
  • the lever 7 is then pivoted back into the position shown.
  • the pins 8 run on the run-up slopes 5c, 5d and bring the ends 5a, 5b together.
  • the protective hood 4 is thereby firmly connected to the housing 1 again.
  • the ends 5a, 5b of the sleeve 5 can also be clamped together by means of an eccentric lever.

Landscapes

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

Abstract

A hand-held tool for driving a cutting or grinding disk includes a housing and a protection hood with a sleeve-shaped extension detachable connected to the housing. A receptacle is mounted on the housing for releaseably holding the sleeve-shaped extension. The receptacle is formed as a slotted sleeve so that it has a variable diameter. The diameter is changed by moving circumferential ends of the sleeve toward or away from one another. The displacement of the sleeve ends can be effected by a lever pivotly mounted on the ends.

Description

Die Erfindung betrifft ein Handgerät zum Antrieb von Trenn- oder Schleifscheiben mit einem Gehäuse und einer die Scheibe teilweise umgebenden, mit dem Gehäuse lösbar verbundenen Schutzhaube, wobei zur lösbaren Verbindung die Schutzhaube einen hülsenförmigen, mit dem Gehäuse zusammenwirkenden Ansatz aufweist.The invention relates to a hand-held device for driving cutting or grinding disks with a housing and a protective hood which partially surrounds the disc and is releasably connected to the housing, the protective hood having a sleeve-shaped approach which cooperates with the housing for the releasable connection.

Handgeräte der vorgenannten Art sind mit einer Schutzhaube versehen, welche die Scheibe teilweise umgibt, so dass die Verletzungsgefahr vermindert und ein unkontrolliertes Wegschleudern von Bearbeitungsgut verhindert wird. Je nach Einsatzfall des Handgerätes sind unterschiedliche Teile der Scheibe von der Schutzhaube freizulegen.Hand-held devices of the aforementioned type are provided with a protective hood which partially surrounds the pane, so that the risk of injury is reduced and an uncontrolled throwing away of the material to be processed is prevented. Depending on the application of the handheld device, different parts of the pane must be exposed from the protective hood.

Aus dem vorgenannten Grunde ist es bekannt, Schutzhauben lösbar mit dem Gehäuse zu verbinden, wobei im gelösten Zustand die Schutzhaube gegenüber dem Gehäuse verdreht werden kann. Zum Festklemmen der gegenüber dem Gehäuse anwendungsgerecht ausgerichteten Schutzhaube ist es beispielsweise aus dem DE-U 1 804 220 bekannt, die Schutzhaube mit einem hülsenförmigen Ansatz zu versehen, der im Durchmesser verstellbar ist und mit einem entsprechenden Teil am Gehäuse zusammenwirkt. Der Durchmesserverstellung dient eine mit Werkzeugen betätigbare Stellschraube.For the aforementioned reason, it is known to releasably connect protective hoods to the housing, the protective hood being able to be rotated relative to the housing in the released state. In order to clamp the protective hood, which is aligned with the housing in accordance with the application, it is known, for example from DE-U 1 804 220, to provide the protective hood with a sleeve-shaped projection which is adjustable in diameter and cooperates with a corresponding part on the housing. The diameter is adjusted using a set screw that can be operated with tools.

Je nach Lage der Schutzhaube ist es möglich, dass die Stellschraube beispielsweise in eine vom Gehäuse derart verdeckte Stellung kommt, dass sie vom Werkzeug nicht erreichbar ist. Die Schutzhaube kann daher nicht ausreichend festgeklemmt werden.Depending on the position of the protective hood, it is possible for the adjusting screw to come into a position, for example, which is hidden by the housing in such a way that it cannot be reached by the tool. The protective hood can therefore not be clamped sufficiently.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Handgerät der genannten Art zu schaffen, dessen Schutzhaube in jeder Stellung ausreichend und ausserdem ohne gesonderten Werkzeugaufwand am Gehäuse festklemmbar ist.The present invention has for its object to provide a handheld device of the type mentioned, the protective cover is sufficient in any position and also clamped to the housing without any special tools.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass das Gehäuse eine im Durchmesser verstellbare Aufnahme für den hülsenförmigen Ansatz der Schutzhaube aufweist.According to the invention, this object is achieved in that the housing has a receptacle which is adjustable in diameter for the sleeve-shaped attachment of the protective hood.

Durch Anordnung einer im Durchmesser verstellbaren Aufnahme am Gehäuse des Handgerätes wird die Möglichkeit geschaffen, auch die Verstelleinrichtung am Gehäuse anzuordnen. Dadurch nimmt die Verstelleinrichtung immer dieselbe Lage ein, unabhängig von der Stellung der Schutzhaube. Die Zugänglichkeit wird dadurch in keiner Stellung der Schutzhaube beeinträchtigt.By arranging a diameter-adjustable receptacle on the housing of the hand-held device, it is possible to also arrange the adjusting device on the housing. As a result, the adjustment device always takes the same position, regardless of the position of the protective hood. The accessibility is not affected in any position of the protective hood.

Vorzugsweise ist die Aufnahme als geschlitzte Hülse ausgebildet, wobei deren umfangsseitige Enden zur Verstellung des Durchmessers der Aufnahme relativ zueinander versetzbar sind. Durch Ausbildung einer solch geschlitzten Hülse wird ein ungehindertes Festklemmen der mit einem hülsenförmigen Ansatz versehenen Schutzhaube in jeder beliebigen Drehstellung gewährleistet.The receptacle is preferably designed as a slotted sleeve, the circumferential ends of which can be displaced relative to one another in order to adjust the diameter of the receptacle. By forming such a slotted sleeve, an unhindered clamping of the protective hood provided with a sleeve-shaped attachment is ensured in any rotational position.

Um den Einsatz von Werkzeugen zu vermeiden, sind die umfangsseitigen Enden der geschlitzten Hülse vorzugsweise mittels eines Exzenterhebels relativ zueinander versetzbar. Ein solcher Exzenterhebel kann beispielsweise mit abgewinkelten Lappen der umfangsseitigen Enden der geschlitzten Hülse zusammenwirken, wobei diese Lappen zusätzlich die Lager eines solchen Exzenterhebels aufnehmen können.In order to avoid the use of tools, the circumferential ends of the slotted sleeve can preferably be displaced relative to one another by means of an eccentric lever. Such an eccentric lever can cooperate, for example, with angled tabs on the peripheral ends of the slotted sleeve, these tabs also being able to accommodate the bearings of such an eccentric lever.

Die Erfindung soll nachstehend, anhand einer sie beispielsweise wiedergebenden Zeichnung, näher erläutert werden. Diese zeigt ein erfindungsgemässes Handgerät mit entfernter Schutzhaube, in perspektivischer Darstellung. Das Handgerät weist ein Gehäuse 1 mit einem damit verbundenen Handgriff 2 auf. An dem dem Handgriff 2 entgegengesetzten Ende des Gehäuses 1 ragt eine Spindel 3 zur Aufnahme einer nicht dargestellten Schleifscheibe aus dem Gehäuse 1. Eine die Scheibe teilweise umgebende Schutzhaube 4 weist zur lösbaren Verbindung mit dem Gehäuse 1 einen hülsenförmigen Ansatz 4a auf.The invention will be explained in more detail below on the basis of a drawing, for example, showing it. This shows a hand-held device according to the invention with the protective hood removed, in a perspective view. The hand-held device has a housing 1 with a handle 2 connected to it. At the end of the housing 1 opposite the handle 2, a spindle 3 protrudes from the housing 1 for receiving a grinding wheel (not shown). A protective hood 4 partially surrounding the wheel has a sleeve-shaped extension 4a for releasable connection to the housing 1.

Am Gehäuse 1 ist eine die Spindel 3 umgebende, im Durchmesser verstellbare Aufnahme für den hülsenförmigen Ansatz 4a der Schutzhaube 4 angeordnet. Die Aufnahme ist als geschlitzte Hülse 5 ausgebildet, deren umfangsseitige Enden 5a, 5b zur Verstellung des Durchmessers der Aufnahme relativ zueinander versetzbar sind. Die Enden 5a, 5b sind radial nach aussen abgewinkelt. Die Hülse 5 ist nur über einen Teil ihres Umfanges mit dem Gehäuse 1 verbunden, so dass sie durch Zusammenziehen der Enden 5a, 5b im Durchmesser verstellbar ist. Der Innendurchmesser der Hülse 5 ist auf den Aussendurchmesser des Ansatzes 4a der Schutzhaube 4 abgestimmt. Die abgewinkelten Enden 5a, 5b werden von einem Bolzen 6 durchsetzt. Am Bolzen 6 ist ein Hebel 7 drehbar gelagert. Der Hebel 7 weist zwei mit den Enden 5a, 5b in Verbindung stehende Stifte 8 auf. Beim Schwenken des Hebels 7 in Richtung des Pfeiles A um einen Winkel von 90° gelangen die Stifte 8 in den Bereich von Auflaufschrägen 5c, 5d an den Enden 5a, 5b. Dabei öffnet sich die Hülse 5 infolge ihrer Elastizität oder eines zwischen den abgewinkelten Enden 5a, 5b angeordneten Federelementes 9. Durch dieses sich Oeffnen, beziehungsweise Vergrössern des Durchmessers der Hülse 5 wird die Klemmung des Ansatzes 4a aufgehoben, so dass die Schutzhaube 4 in eine beliebige Stellung verdreht werden kann. Anschliessend wird der Hebel 7 wieder in die dargestellte Stellung geschwenkt. Die Stifte 8 laufen dabei auf den Auflaufschrägen 5c, 5d auf und bewirken eine Zusammenspannen der Enden 5a, 5b. Die Schutzhaube 4 wird dadurch wieder mit dem Gehäuse 1 fest verbunden. Anstelle des Hebels 7 und der Auflaufschrägen 5c, 5d kann das Zusammenspannen der Enden 5a, 5b der Hülse 5 auch mittels eines Exzenterhebels erfolgen.Arranged on the housing 1 is a receptacle which surrounds the spindle 3 and is adjustable in diameter for the sleeve-shaped extension 4a of the protective hood 4. The receptacle is designed as a slotted sleeve 5, the circumferential ends 5a, 5b of which can be displaced relative to one another in order to adjust the diameter of the receptacle. The ends 5a, 5b are angled radially outwards. The sleeve 5 is connected to the housing 1 only over part of its circumference, so that its diameter can be adjusted by pulling the ends 5a, 5b together. The inner diameter of the sleeve 5 is matched to the outer diameter of the extension 4a of the protective hood 4. The angled ends 5a, 5b are penetrated by a bolt 6. A lever 7 is rotatably mounted on the pin 6. The lever 7 has two pins 8 connected to the ends 5a, 5b. When the lever 7 is pivoted in the direction of arrow A by an angle of 90 °, the pins 8 reach the area of run-up slopes 5c, 5d at the ends 5a, 5b. In this case, the sleeve 5 opens due to its elasticity or a spring element 9 arranged between the angled ends 5a, 5b. This opening or enlarging the diameter of the sleeve 5 removes the clamping of the extension 4a, so that the protective hood 4 is in any position Position can be rotated. The lever 7 is then pivoted back into the position shown. The pins 8 run on the run-up slopes 5c, 5d and bring the ends 5a, 5b together. The protective hood 4 is thereby firmly connected to the housing 1 again. Instead of the lever 7 and the run-up slopes 5c, 5d, the ends 5a, 5b of the sleeve 5 can also be clamped together by means of an eccentric lever.

Claims (3)

  1. Hand tool for driving separating or grinding discs, comprising a housing (1) and a protective cover (4) which partially surrounds the disc and which is detachably connected to the housing (1), and wherein the protective cover (4) comprises a sleeveshaped extension (4a), which is connected to the housing and which serves the detachable connection, characterised in that the housing (1) comprises a diametrally adjustable receptacle for the sleeveshaped extension (4a) of the protective cover (4).
  2. Hand tool according to claim 1, characterised in that the receptacle is arranged as a slotted sleeve (5), the peripheral ends (5a, 5b) of which are transposable relative to each other for the purpose of adjusting the diameter of the receptacle.
  3. Hand tool according to claim 2, characterised in that an eccenter lever is provided for relative transposition of the peripheral ends (5a, 5b) of the slotted sleeve (5).
EP90810444A 1989-07-01 1990-06-19 Hand device with a wheel for cutting-off or grinding Expired - Lifetime EP0407337B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90810444T ATE91941T1 (en) 1989-07-01 1990-06-19 HAND-HELD DEVICE WITH CUTTING OR GRINDING DISC.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921772 1989-07-01
DE3921772A DE3921772A1 (en) 1989-07-01 1989-07-01 HAND DEVICE WITH CUTTING OR GRINDING DISC

Publications (2)

Publication Number Publication Date
EP0407337A1 EP0407337A1 (en) 1991-01-09
EP0407337B1 true EP0407337B1 (en) 1993-07-28

Family

ID=6384159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810444A Expired - Lifetime EP0407337B1 (en) 1989-07-01 1990-06-19 Hand device with a wheel for cutting-off or grinding

Country Status (6)

Country Link
US (1) US5031325A (en)
EP (1) EP0407337B1 (en)
JP (1) JP2826370B2 (en)
AT (1) ATE91941T1 (en)
DE (2) DE3921772A1 (en)
ES (1) ES2042263T3 (en)

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DE4113641A1 (en) * 1991-04-26 1992-10-29 Bosch Gmbh Robert HAND MACHINE TOOL
US5637035A (en) * 1995-06-28 1997-06-10 Milwaukee Electric Tool Corporation Adjustable guard arrangement for power tool
US5582041A (en) * 1995-09-18 1996-12-10 Spiess; David E. Portable hand-held fleshing tool
US6071184A (en) * 1998-09-02 2000-06-06 Seh America, Inc. Fluid deflecting device for use in work piece holder during a semiconductor wafer grinding process
US6561887B2 (en) * 2000-02-17 2003-05-13 Bao Shyan Lai Protective cover detachably installed on a cutting machine/engraving machine combination
US6464573B1 (en) 2000-06-30 2002-10-15 Porter-Cable Corporation Guard attachment system with knurled clamp ring
US6699114B1 (en) * 2002-04-26 2004-03-02 Benedict Engineering Company, Inc. Pivotal guards for power hand tools with rotating discs
US6886258B2 (en) * 2002-11-15 2005-05-03 Richard C. Swanson Hand-held rotary hedge trimmer
TWM251717U (en) * 2004-01-20 2004-12-01 Yue-Ting Chen Adjusting structure for hand-held cutter
JP4730374B2 (en) * 2005-08-22 2011-07-20 株式会社ワーク 3 piece wheel plating remover
DE102007000845A1 (en) * 2007-10-11 2009-04-16 Hilti Aktiengesellschaft Manually operated machine for operating separating or grinding tool, has housing, drive screw for separating or grinding tool, and clamping lever mechanism that is provided with retaining spring element
JP2010005720A (en) * 2008-06-25 2010-01-14 Masao Nishiki Hand type rotary tool
JP5684056B2 (en) * 2010-08-16 2015-03-11 株式会社マキタ Hand tool
JP5959421B2 (en) * 2011-12-14 2016-08-02 株式会社マキタ Grinder
DE102011089758A1 (en) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Guard anti
DE102012210762A1 (en) * 2012-06-25 2014-01-02 Robert Bosch Gmbh Guard device
DE102012214834A1 (en) * 2012-08-21 2014-02-27 Robert Bosch Gmbh Guard device

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CA608790A (en) * 1960-11-15 The Stanley Works Saw blade guard
US3382578A (en) * 1966-05-11 1968-05-14 Gunther Heinrich Wilhelm Dobbertin Portable cutting tools
US3818648A (en) * 1973-01-10 1974-06-25 Cincinnati Milacron Inc Quick-change wheel guard for tool and cutter grinder
US3969856A (en) * 1973-09-25 1976-07-20 Andreas Stihl Maschinenfabrik Adjustable protective hood for a rotary tool
JPS54177693U (en) * 1978-06-03 1979-12-15
DE3338917A1 (en) * 1983-10-27 1985-05-09 C. & E. Fein Gmbh & Co, 7000 Stuttgart PROTECTIVE HOOD FASTENING FOR PORTABLE ANGLE GRINDERS
DE3636300A1 (en) * 1986-10-24 1988-04-28 Verseidag Sheetlike structure formed from fibres, in particular for use as reinforcing layer in plastics components
DE3636500C2 (en) * 1986-10-27 1995-02-09 Bosch Gmbh Robert Protective hood for hand machine tools, in particular grinding machines
DE3638337A1 (en) * 1986-11-10 1988-05-19 Licentia Gmbh Clamping device for the protective hood of angle grinders or similar power tools
US4790696A (en) * 1987-12-03 1988-12-13 The Stanley Works Chuck key mounting and ejector arrangement

Also Published As

Publication number Publication date
ES2042263T3 (en) 1993-12-01
JP2826370B2 (en) 1998-11-18
DE59002083D1 (en) 1993-09-02
JPH03117556A (en) 1991-05-20
ATE91941T1 (en) 1993-08-15
DE3921772A1 (en) 1991-01-03
EP0407337A1 (en) 1991-01-09
US5031325A (en) 1991-07-16

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