EP1677948A1 - 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

Info

Publication number
EP1677948A1
EP1677948A1 EP04762561A EP04762561A EP1677948A1 EP 1677948 A1 EP1677948 A1 EP 1677948A1 EP 04762561 A EP04762561 A EP 04762561A EP 04762561 A EP04762561 A EP 04762561A EP 1677948 A1 EP1677948 A1 EP 1677948A1
Authority
EP
European Patent Office
Prior art keywords
protective hood
rotation
tool
blocking
blocking means
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.)
Granted
Application number
EP04762561A
Other languages
German (de)
English (en)
Other versions
EP1677948B1 (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
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 relates to a protective hood for an electric machine tool, an electric machine tool and a system with a protective hood and an electric machine tool according to the preambles of the independent claims.
  • the invention is based on a protective hood for a power tool machine with a rotatingly drivable insert. Tool with which the insert tool can be covered at least in some areas.
  • At least one blocking means be provided which at least prevents rotation about an axis of rotation of the insert tool. This can both improve safety against touching the insert tool and also ensure a protective function even if the insert tool bursts. Now fragments flying apart can no longer twist the protective hood on the drive shaft to such an extent that the fragments endanger an operator. Blocking the twisting of the protective hood in the event of damage is independent of a tightening torque of fastening the protective hood.
  • the blocking means is preferably formed by a stop cam in a flange serving for fastening, which extends essentially parallel to the axis of rotation.
  • the protective hood is attached to the power tool with the flange and therefore allows a space-saving and easy-to-use arrangement of the anti-rotation device.
  • the stop cam can be directed inwards. An arrangement with an outwardly directed stop cam is also possible. The person skilled in the art will select a suitable arrangement in accordance with the power tool machine used.
  • the blocking means is formed by a stop cam in a tension band connected to the flange, an increased degree of security can be obtained with an easily producible means.
  • the anti-rotation device is not dependent on an adhesive force caused by a tightening torque There is a clamping screw with which the tensioning strap is fastened on a tensioning neck. Even if the clamping screw is accidentally tightened too weakly, the anti-rotation lock is effective. If the stop cam hits a stop, the protective hood is reliably held in this position.
  • the anti-rotation device is located entirely inside the protective hood.
  • the blocking agent is formed by a protruding blocking lug on the protective hood, this can be worked inexpensively and without effort directly from the sheet of the protective hood.
  • the blocking lug can also be welded, glued or screwed to the protective hood.
  • the blocking lug can also be retrofitted.
  • the blocking nose can preferably protrude outwards. Alternatively, this can also be directed inwards at a suitable point.
  • the anti-rotation lock can be arranged to save space.
  • the blocking lug can be arranged on a surface that extends essentially perpendicular to the axis of rotation, adjacent to a recess for a drive shaft of the insert tool that is to be covered by the protective hood.
  • the blocking nose then advantageously does not protrude into the work area of an operator.
  • the invention is based on an electric machine tool with an electric motor arranged in a housing, through which an insert tool can be driven in rotation. It is proposed to provide an anti-rotation device that at least hinders a release of the insert tool in the direction of an operator.
  • a twisting of the protective hood about an axis of rotation of the insert tool can at least be limited. This can both improve safety against touching the insert tool and also ensure a protective function even if the insert tool bursts. Flying fragments of the insert tool can no longer twist the protective hood on the drive shaft to such an extent that the fragments endanger an operator.
  • the anti-twist device has a stop means corresponding to the blocking means, twisting of the protective hood can be restricted to a narrow angular range or completely prevented.
  • a tensioning neck has an insertion groove with a limiting groove arranged at an angle to it, a tensioning strap can be inserted with the stop cam pushed through on the inside thereof.
  • the protective hood can only be rotated within the limiting groove, which limits the angular range of the protective hood.
  • the protective hood can be attached in any position within the limiting groove.
  • a blocking nose and / or a stop cam can be provided there strike and the protective hood is obstructed in an undesired rotary movement.
  • the invention is also based on a system comprising a protective hood and a power tool.
  • an anti-rotation device with a blocking means on the protective hood side and a corresponding power tool on the machine side stop means.
  • the blocking means can be a direct component of the protective hood, for example a blocking nose or a cam, or can be provided on a fastening with which the protective hood is connected to the power tool. A rotation of the protective hood above the stopper is reliably • avoided.
  • an anti-twist device can be triggered by the action of the tool on the protective hood, this can be done in the event of a fault
  • the protective hood can only be rotated within an angular range that still ensures the protective function. Installation of the protective hood in a position that is normal for the normal functioning of the power tool is not hindered.
  • the power tool is particularly preferably designed as an angle grinding machine, the grinding wheel of which is covered at least in regions with a protective hood.
  • the protective hood can no longer be so far from the fragments in the original direction that the operator can be hit by fragments.
  • the anti-twist device is independent of a tightening torque when the protective hood is attached to a clamping neck.
  • FIG. 1 shows a preferred angle grinder
  • FIG. 2 schematically shows a side view according to a first exemplary embodiment
  • FIG. 3 shows a maximum angular range when the protective hood is rotated
  • FIG. 4 shows a schematic view of a tensioning strap for fastening the protective hood
  • FIG. 5 shows a Top view of a protective hood with a strap
  • Fig. 6 is an anti-rotation device according to a second embodiment. Description of the embodiments
  • FIG. 1 An electric machine tool in the form of a preferred angle grinder is shown in FIG. 1.
  • An electric motor not shown, is arranged in a housing 10, through which an insert tool 14, here a grinding wheel, can be driven in rotation.
  • an output shaft of the electric motor is usually arranged perpendicular to an input shaft of the insert tool.
  • the angle grinder can be held and guided on an angularly projecting handle 12.
  • a protective hood 16 covers the insert tool 14 to such an extent that protection against contact is guaranteed for an operator.
  • the protective hood 16 is designed as a semicircle with a circumferential flange which projects downward on the circumference and covers one half of the surface and edge of the grinding wheel 14.
  • the protective hood 16 has, for example, a flange 30 which projects upwards in the center of its imaginary circular surface and runs essentially parallel to an axis of rotation 18 and has a tensioning strap 26 fastened thereon and is thus fastened to a tensioning neck 24 (FIGS. 2-5).
  • an anti-rotation device 20 is provided according to the invention, which prevents the protective hood 16 from rotating about an axis of rotation of the insert tool 14 or around the clamping neck 24 at least limited.
  • FIGS. 2 to 5 show a first preferred exemplary embodiment of an anti-rotation device 20.
  • a blocking means in the form of a stop cam 32 is provided on the protective hood side, which is formed in a clamping band 26 for fastening a protective hood 16 on the clamping neck 24 and pushed through to the inside of the clamping band 26 (FIG. 4).
  • An essentially vertical insertion groove 36 is provided in the tensioning neck 24 with a limiting groove 34 arranged at an angle thereto, which forms a stop means corresponding to the stop cam 32.
  • the limiting groove 34 limits a possible rotation about an axis of rotation 18 to an angular range ⁇ (FIG. 3).
  • the rotation is independent of a torque of a clamping screw 28 with which the tension band is tightened to the clamping collar 24 around 26 blocked by one or other 'end of the restriction groove 34th
  • the tightening strap 26 is shown in more detail in FIG. 4.
  • the clamping band 26 surrounds a flange 30 protruding from the protective hood 16 and clamps the flange 30 of the protective hood 16 on the clamping neck 24 of the drive shaft 22.
  • the stop cam 32 is inserted into the limiting groove 34 via the insertion groove 36.
  • the clamping screw 28 is screwed into a screw receptacle 38.
  • the limiting groove 34 expediently extends from the insertion groove 36 in the direction of rotation of the insert tool 14.
  • the protective hood 16 can only be rotated at a maximum angle. range ⁇ possible over which the limiting groove 34 extends (FIG. 3).
  • a suction 44 can also be integrated into the protective hood 16, with which dust that occurs when working with the insert tool 14 can be removed.
  • the stop cam 32 is pressed through on the inside of the tensioning band 26, with which the protective hood 16 is fastened to the tensioning neck 24, and projects into the limiting groove 34 of the tensioning neck 24.
  • FIG. 6 Another embodiment of the anti-rotation device 20 is shown in FIG. 6.
  • a blocking nose 40 is formed on the protective hood 16, which is worked out of the sheet metal of the protective hood 16 by partially punching out and bending over.
  • the blocking nose 40 can also be welded, glued or screwed on.
  • the blocking lug 40 projects outwards 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 can be incorporated directly into the housing 10 or welded, glued or screwed on. Stop 42 or blocking nose 40 can also be retrofitted.
  • a blocking nose 40 x can be worked out of a wall of the protective hood 16 oriented perpendicular to the axis of rotation 18 by partially punching out and bending over.
  • the blocking nose 40 abuts the stop 42, should the protective hood 16 on the clamping neck 24 rotate in the direction of rotation.
  • the protective hood 16 can be secured using a conventional tensioning strap 26 be attached to the clamping neck 24.
  • the tensioning strap 26 can additionally also be equipped with an anti-rotation device 20 according to the invention, as was described in the previous figures.
  • the protective hood 16 can expediently be mounted in such a way that the blocking means 32, 40 are in each case as closely adjacent to the stop means 34, 42 as possible. Rotation of the protective hood 16 on the clamping neck 24, which is caused by the insert tool 14 bursting, can thereby be minimized.

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)

Abstract

L'invention concerne un capot protecteur d'une machine-outil électrique comprenant un outil-insert (14) entraîné en rotation. Ce capot protecteur recouvre au moins partiellement l'outil-insert (14). Selon l'invention, au moins un moyen bloquant empêche au moins la rotation autour d'un axe de rotation (18) de l'outil-insert (14).
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 Active 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 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-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

Publications (2)

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

Family

ID=34442056

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04762561.1A Active 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
EP15177840.4A Expired - Fee Related 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

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15177840.4A Expired - Fee Related 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) EP1677948B1 (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
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EP2204262B1 (fr) * 2007-10-22 2014-08-13 Makita Corporation Arrêt de protège-meule dans une affûteuse
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
US8948382B2 (en) 2010-12-16 2015-02-03 Microsoft Corporation Secure protocol for peer-to-peer network
US9294545B2 (en) 2010-12-16 2016-03-22 Microsoft Technology Licensing, Llc Fast join of peer to peer group with power saving mode
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
US9878415B1 (en) * 2014-07-22 2018-01-30 Durell Laboratories, Inc. Portable ski and snowboard edge sharpener
US10905938B2 (en) * 2014-07-22 2021-02-02 Durell Laboratories, Inc. Portable ski and snowboard edge sharpener and method of using the same
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Also Published As

Publication number Publication date
WO2005044514A1 (fr) 2005-05-19
EP2962809A1 (fr) 2016-01-06
EP2962809B1 (fr) 2019-06-12
US20100248599A1 (en) 2010-09-30
CN1867425A (zh) 2006-11-22
US8011997B2 (en) 2011-09-06
DE10348395A1 (de) 2005-05-19
US20060286910A1 (en) 2006-12-21
CN1867425B (zh) 2013-07-31
EP1677948B1 (fr) 2016-09-07

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