EP1677948B1 - Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique - Google Patents

Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique Download PDF

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Publication number
EP1677948B1
EP1677948B1 EP04762561.1A EP04762561A EP1677948B1 EP 1677948 B1 EP1677948 B1 EP 1677948B1 EP 04762561 A EP04762561 A EP 04762561A EP 1677948 B1 EP1677948 B1 EP 1677948B1
Authority
EP
European Patent Office
Prior art keywords
guard
rotation
blocking
electric machine
machine tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04762561.1A
Other languages
German (de)
English (en)
Other versions
EP1677948A1 (fr
Inventor
Mike Voigt
Albert Kleider
Kurt Neef
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
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP15177840.4A priority Critical patent/EP2962809B1/fr
Publication of EP1677948A1 publication Critical patent/EP1677948A1/fr
Application granted granted Critical
Publication of EP1677948B1 publication Critical patent/EP1677948B1/fr
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

Definitions

  • the invention is based on a protective hood according to the preamble of claim 1.
  • An angle grinder protective hood with a tensioning device which has a clamping band fixedly connected to the angle grinder protective hood.
  • the two ends of the tension band are formed as eyelets, so that they form abutments which are connected to each other under tension by means of two clamping elements.
  • the first tensioning element is a tensioning lever, which can be mounted with its first end in the first eye pivotably about a first axis. It can be brought into a first position, in which the tensioning device is not tensioned, and in a second position, in which the tensioning device is tensioned.
  • the invention relates to a protective hood for a power tool with a rotatably driven insert tool.
  • the insert tool With the protective cover the insert tool is at least partially coverable.
  • a blocking means is provided to hinder rotation of the protective hood about an axis of rotation of the insertion tool. It is proposed that the protective hood comprises the features of claim 1.
  • the blocking means is formed by a stop cam in a tension band connected to the flange, an increased degree of safety can be obtained with an easily producible means.
  • the anti-rotation is not dependent on a clamping force, which is given by a tightening torque of a clamping screw with which the strap is mounted on a clamping neck. Even if the clamping screw has been tightened by mistake, the anti-twist protection is effective. If the stop cam encounters a stop, the guard is reliably held in this position.
  • Clamping screw is given, with which the clamping band is mounted on a clamping neck. Even if the clamping screw has been tightened by mistake, the anti-twist protection is effective. If the stop cam encounters a stop, the guard is reliably held in this position. If the stop cam in the assembled state is directed towards a clamping neck, a corresponding stop can be provided on the clamping neck of the electric machine tool.
  • the anti-rotation lock is arranged completely inside the protective hood.
  • the blocking agent is formed by a protruding blocking lug on the protective cover, this can be worked inexpensively and inexpensively directly from the metal sheet of the protective hood.
  • the blocking nose can also be welded, glued or screwed to the protective hood.
  • the blocking nose can also be retrofitted.
  • the blocking lug can preferably protrude outwards. Alternatively, this may also be directed inwards at a suitable location.
  • the anti-rotation device can be arranged to save space.
  • the blocking lug is arranged on a surface extending substantially perpendicular to the axis of rotation adjacent to a recess for a drive shaft of the insert tool, which is to be covered by the protective hood.
  • the blocking nose then conveniently does not protrude into the working area of an operator.
  • the invention is further based on a system of protective hood and power tool according to claim 5.
  • an anti-rotation device with a protective hood-side blocking means and a corresponding power tool machine-side stop means.
  • the blocking means may be directly part of the protective hood, such as a blocking lug or a cam, or may be provided on a fastening, with which the protective hood is connected to the power tool. A twisting of the guard beyond the stop is reliably avoided.
  • the safety of the operator can be guaranteed in case of failure.
  • the guard can be twisted at most in an angular range, which still ensures the protective function. Installation of the protective hood in a normal for the normal function of the power tool position is not hindered.
  • the power tool is designed as an angle grinder whose grinding wheel is at least partially covered with a protective hood.
  • the protective hood can no longer be as far away from the fragments in the original direction of rotation be taken along, that the operator can be hit by fragments.
  • the rotation is independent of a torque of attachment of the guard to a collet.
  • a power tool in the form of a preferred angle grinder is in Fig. 1 shown.
  • a housing 10 an unillustrated electric motor is arranged through which an insert tool 14, here a grinding wheel, is driven in rotation.
  • an insert tool 14 here a grinding wheel
  • an output shaft of the electric motor is arranged perpendicular to a drive shaft of the insert tool.
  • the angle grinder can be held and guided on an angularly projecting handle 12.
  • a protective cover 16 covers the insertion tool 14 so far that a contact protection for an operator is ensured.
  • the protective hood 16 is designed as a semicircle with a circumferentially projecting, peripheral flange which covers one half of the surface and edge of the grinding wheel 14.
  • the protective hood 16 has, for example, a flange 30 projecting centrally in its imaginary circular area and extending substantially parallel to a rotation axis 18 with a tensioning band 26 fastened thereto and is thus fastened to a clamping neck 24 (FIG. Fig. 2-5 ).
  • a rotation 20 is provided according to the invention, which at least limits a rotation of the protective cover 16 about an axis of rotation of the insert tool 14 and the clamping neck 24 ,
  • Fig. 2 to Fig. 5 show a first preferred embodiment of an anti-rotation 20.
  • a blocking means in the form of a stop cam 32 is provided, which is formed in a clamping band 26 for fastening a protective cover 16 on the clamping collar 24 and pressed to the inside of the clamping band 26 ( Fig. 4 ).
  • a substantially vertically extending insertion 36 is provided with an angle thereto arranged Begrenzungsnut 34 which forms a stop cam 32 corresponding to the stop means.
  • the limiting groove 34 limits a possible rotation about an axis of rotation 18 to an angle range ⁇ (FIG. Fig. 3 ).
  • the rotation is independent of a tightening torque of a clamping screw 28, with which the clamping band 26 is tightened around the clamping collar 24 around, blocked by one or the other end of the Begrenzungsnut 34.
  • the tension band 26 is more detailed in FIG Fig. 4 shown.
  • the clamping band 26 surrounds a protruding from the protective cover 16 flange 30 and clamps the flange 30 of the protective cover 16 on the clamping neck 24 of the drive shaft 22 fixed.
  • the stop cam 32 is inserted via the insertion groove 36 into the limiting groove 34.
  • the clamping screw 28 is screwed into a screw receptacle 38. By tightening the clamping screw 28, the protective cover 16 can be clamped more or less firmly on the clamping neck 24.
  • the limiting groove 34 expediently extends from the insertion groove 36 in the direction of rotation of the insertion tool 14. A rotation of the protective hood 16 is only a maximum in the angular range ⁇ possible over which the limiting groove 34 extends ( Fig. 3 ).
  • Fig. 5 shows a plan view of the arrangement.
  • an exhaust 44 may be integrated, can be removed with the dusts that arise when working with the insert tool 14.
  • the stop cam 32 is pressed on the inside of the tension band 26, with which the protective cover 16 is attached to the clamping neck 24, and projects into the limiting groove 34 of the clamping neck 24.
  • FIG Fig. 6 Another embodiment of the anti-rotation device 20 is shown in FIG Fig. 6 shown.
  • a blocking lug 40 is formed on the protective cover 16, which is machined out of the sheet of the protective cover 16 by partial punching and bending.
  • the blocking lug 40 may also be welded, glued or screwed.
  • the blocking lug 40 projects outwardly from a surface of the protective hood 16 such that it can come into contact with a stop 42 which is attached to the housing 10.
  • the stop 42 may be incorporated directly into the housing 10 or welded, glued or screwed. Stop 42 or blocking lug 40 can also be retrofitted.
  • a blocking lug 40 may be machined out of a wall of the protective hood 16 aligned perpendicular to the axis of rotation 18 by partial punching and bending.
  • the blocking lug 40 abuts against the stop 42, should the protective cover 16 rotate on the clamping neck 24 in the direction of rotation.
  • the protective cover 16 can with a conventional strap 26th be attached to the clamping neck 24.
  • the tension band 26 may additionally be equipped with an anti-rotation device 20 according to the invention, as described in the preceding figures.
  • the protective cover 16 can be suitably mounted so that the blocking means 32, 40 are each adjacent as closely as possible to the stop means 34, 42 adjacent. A rotation of the protective cover 16 on the clamping neck 24, which is caused by a bursting of the insert tool 14, can be minimized thereby.

Landscapes

  • 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)

Claims (7)

  1. Capot de protection pour une machine-outil électrique, comprenant un outil insérable (14) pouvant être entraîné en rotation, l'outil insérable (14) pouvant être recouvert au moins en partie avec le capot, comprenant au moins un moyen de blocage (32, 40), l'au moins un moyen de blocage (32, 40) étant prévu pour bloquer une rotation du capot de protection autour d'un axe de rotation (18) de l'outil insérable (14), caractérisé en ce que le moyen de blocage est formé par un ergot de blocage saillant (40) qui est façonné à partir de la tôle du capot de protection (16) par estampage partiel et pliage et/ou qui est attaché par soudage, collage ou vissage, l'ergot de blocage (40) étant disposé au niveau d'une surface s'étendant essentiellement perpendiculairement à l'axe de rotation (18), en position adjacente à un évidement pour un arbre d'entraînement (22).
  2. Capot de protection selon la revendication 1, caractérisé en ce que le moyen de blocage (32, 40) est formé par une came de butée (32) dans une bride (30) servant la fixation, laquelle s'étend essentiellement parallèlement à l'axe de rotation (18).
  3. Capot de protection selon la revendication 1 ou 2, caractérisé en ce que le moyen de blocage (32, 40) est formé par une came de butée (32) dans une bande de serrage (26) connectée à la bride (30).
  4. Capot de protection selon la revendication 3, caractérisé en ce que la came de butée (32) est orientée dans l'état monté vers un col de serrage (24).
  5. Système constitué d'une machine-outil électrique et d'un capot de protection (16) selon l'une quelconque des revendications précédentes.
  6. Système selon la revendication 5, caractérisé en ce que la fixation contre la rotation (20) peut être desserrée par action de l'outil insérable (14) sur le capot de protection (16).
  7. Meuleuse d'angle dont la meule est au moins en partie recouverte par un capot de protection (16) selon l'une quelconque des revendications précédentes.
EP04762561.1A 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique Expired - Lifetime EP1677948B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15177840.4A EP2962809B1 (fr) 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10348395A DE10348395A1 (de) 2003-10-17 2003-10-17 Schutzhaube für eine Elektrowerkzeugmaschine, Elektrowerkzeugmaschine sowie System mit Schutzhaube und Elektrowerkzeugmaschine
PCT/DE2004/001716 WO2005044514A1 (fr) 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP15177840.4A Division-Into EP2962809B1 (fr) 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique
EP15177840.4A Division EP2962809B1 (fr) 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique

Publications (2)

Publication Number Publication Date
EP1677948A1 EP1677948A1 (fr) 2006-07-12
EP1677948B1 true EP1677948B1 (fr) 2016-09-07

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP15177840.4A Expired - Lifetime EP2962809B1 (fr) 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique
EP04762561.1A Expired - Lifetime EP1677948B1 (fr) 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15177840.4A Expired - Lifetime EP2962809B1 (fr) 2003-10-17 2004-07-30 Capot protecteur d'une machine-outil electrique, machine-outil electrique et systeme pourvu d'un capot protecteur et de la machine-outil electrique

Country Status (5)

Country Link
US (2) US20060286910A1 (fr)
EP (2) EP2962809B1 (fr)
CN (1) CN1867425B (fr)
DE (1) DE10348395A1 (fr)
WO (1) WO2005044514A1 (fr)

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DE102005063017B4 (de) 2005-12-30 2019-05-16 Robert Bosch Gmbh Handgeführtes Elektrowerkzeug mit einer Schutzhaube
DE102006053305A1 (de) * 2006-11-13 2008-05-15 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube, insbesondere Winkelschleifer
CN101835560A (zh) * 2007-10-22 2010-09-15 株式会社牧田 研磨机上的砂轮罩的止挡装置
DE102007057032A1 (de) * 2007-11-27 2009-05-28 Robert Bosch Gmbh Handwerkzeugmaschine
DE102008010977A1 (de) * 2008-02-25 2009-08-27 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere handgeführte Schleifmaschine
DE102008023324A1 (de) 2008-05-13 2009-11-19 Aeg Electric Tools Gmbh Schutzhaube für ein Elektrowerkzeug, insbesondere einen Winkelschleifer sowie Elektrowerkzeug mit einer derartigen Schutzhaube
JP2010274404A (ja) * 2009-06-01 2010-12-09 Makita Corp ディスクグラインダにおける砥石カバーの固定具脱落防止構造
JP5579575B2 (ja) 2010-11-02 2014-08-27 株式会社マキタ ディスクグラインダ
US9542203B2 (en) 2010-12-06 2017-01-10 Microsoft Technology Licensing, Llc Universal dock for context sensitive computing device
US8923770B2 (en) 2010-12-09 2014-12-30 Microsoft Corporation Cognitive use of multiple regulatory domains
US8792429B2 (en) 2010-12-14 2014-07-29 Microsoft Corporation Direct connection with side channel control
US9294545B2 (en) 2010-12-16 2016-03-22 Microsoft Technology Licensing, Llc Fast join of peer to peer group with power saving mode
US8948382B2 (en) 2010-12-16 2015-02-03 Microsoft Corporation Secure protocol for peer-to-peer network
US8971841B2 (en) * 2010-12-17 2015-03-03 Microsoft Corporation Operating system supporting cost aware applications
DE102012214834A1 (de) * 2012-08-21 2014-02-27 Robert Bosch Gmbh Schutzhaubenvorrichtung
DE102013108355A1 (de) * 2013-08-02 2015-02-05 Rhodius Schleifwerkzeuge Gmbh & Co. Kg Anordnung mit einer handgeführten Werkzeugmaschine und einer Schruppscheibe
US10905938B2 (en) * 2014-07-22 2021-02-02 Durell Laboratories, Inc. Portable ski and snowboard edge sharpener and method of using the same
US9878415B1 (en) * 2014-07-22 2018-01-30 Durell Laboratories, Inc. Portable ski and snowboard edge sharpener
US9545776B2 (en) 2015-01-26 2017-01-17 Dyi-chung Hu Wafer reconfiguration
EP3546124A1 (fr) * 2018-03-29 2019-10-02 HILTI Aktiengesellschaft Appareil de meulage d'angle
US11358267B2 (en) * 2019-09-11 2022-06-14 Textron Innovations Inc. Tool guard
DE102023106280A1 (de) 2023-03-14 2024-09-19 Andreas Stihl Ag & Co. Kg Arbeitsgerät

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Also Published As

Publication number Publication date
US8011997B2 (en) 2011-09-06
US20060286910A1 (en) 2006-12-21
EP1677948A1 (fr) 2006-07-12
US20100248599A1 (en) 2010-09-30
EP2962809B1 (fr) 2019-06-12
CN1867425B (zh) 2013-07-31
CN1867425A (zh) 2006-11-22
DE10348395A1 (de) 2005-05-19
WO2005044514A1 (fr) 2005-05-19
EP2962809A1 (fr) 2016-01-06

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