EP2189244A2 - Appareil de meulage d'angle doté d'un capot protecteur - Google Patents

Appareil de meulage d'angle doté d'un capot protecteur Download PDF

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Publication number
EP2189244A2
EP2189244A2 EP09014399A EP09014399A EP2189244A2 EP 2189244 A2 EP2189244 A2 EP 2189244A2 EP 09014399 A EP09014399 A EP 09014399A EP 09014399 A EP09014399 A EP 09014399A EP 2189244 A2 EP2189244 A2 EP 2189244A2
Authority
EP
European Patent Office
Prior art keywords
tool
edge
tool according
protective hood
neck portion
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
EP09014399A
Other languages
German (de)
English (en)
Other versions
EP2189244B1 (fr
EP2189244A3 (fr
Inventor
Martin Pietzsch
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP2189244A2 publication Critical patent/EP2189244A2/fr
Publication of EP2189244A3 publication Critical patent/EP2189244A3/fr
Application granted granted Critical
Publication of EP2189244B1 publication Critical patent/EP2189244B1/fr
Active legal-status Critical Current
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
    • 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
    • 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
    • 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 motor-driven tool device, in particular angle grinder, with a machine housing part accommodating the electromotive components and a transmission housing part receiving the transmission components, with a motor shaft and a tool spindle, wherein a rotationally drivable tool can be driven by the tool spindle, and with a tool that can be driven in rotation partially encircling protective hood which can be attached and removed from the tool device without tools and being able to be brought into different rotational positions relative to the tool device, wherein the protective hood has a disk-shaped part extending substantially in the plane of the tool and radially outwardly has an edge part surrounding the edge of the tool.
  • the guard comprises a protective collar extending in the axial direction, with which the guard is attached in one way or another on the tool device. This always requires a space extending in the axial direction space, which is to be regarded as disadvantageous.
  • the present invention has the object, a tool device, in particular angle grinder of the type mentioned further to improve that the attachment of the protective cover is space-saving feasible.
  • the disc-shaped part of the guard has an open-edged recess and essentially in its plane in the intended mounting position on a neck portion of the power tool is pushed, in which the neck portion in the open-edged recess of Disc-shaped part is received, and that the neck portion in its circumferential direction continuously or interrupted extended, in particular groove-shaped receiving means for the edge-open recess bounding edge portion of the disc-shaped part of the protective hood, so that the edge portion of the disc-shaped part when pushed onto the neck portion in the receiving means engages and thus the protective hood is held in a form-fitting manner in the axial direction on the neck portion, and that the protective hood in its mounting position is supported by a loading or locking means in the circumferential direction and in the radial direction against loosening or twisting.
  • the protective hood Due to the inventive design of the power tool and its protective cover can be dispensed with a projecting in the axial direction clamping collar in the guard. Rather, the protective hood is held with its lying substantially in the plane of the disc-shaped part of the protective cover and expiring therein edge portion on the neck portion of the tool device. Thus, it takes place in the plane of the grinding tool or the guard succession pushing the guard on the neck portion.
  • typical protective hoods with axial clamping collars are brought into their intended mounting position in the axial direction, which, as mentioned, requires or consumes axial space and thus complicates a compact and flat design of a tool device, in particular an angle grinder, in the region of its gear head.
  • the protective hood is thus pushed in its plane on the neck portion of the tool device and then usually rotated, so that the rotating drivable tool, in particular grinding or cutting tool or saw blade, only partially overlapping guard can be brought into the user desired position.
  • the guard is positioned to overhang the user-facing half-side of the tool.
  • the protective hood is held in the axial direction by the form-fitting receiving means and in the radial direction and in the circumferential direction by the loading or locking means, which prevents the protective cover from loosening or rotating again in the radial direction from the receiving means.
  • the open-edged recess typically and preferably covers a circumferential angle of 120 ° -180 °, in particular of 140 ° -170 ° and more particularly of 150 ° -170 °.
  • Said neck portion of the tool device is preferably formed by an integral wall portion of a housing part of the tool device.
  • the neck portion has a circumferentially continuous radially outwardly opening groove which forms the receiving means and whose groove width substantially corresponds to the thickness of the edge-open recess bounding edge portion of the disc-shaped part, so that the edge portion in the groove is receivable.
  • the axial extent of the neck portion is preferably only 3-10 mm, in particular 3-8 mm, and more particularly 3-6 mm.
  • the axial extent of the neck portion is less than the axial extent of a driven-side gear, in particular ring gear, an angle gear assembly and the neck portion surrounds the gear radially outside.
  • the mentioned loading or locking means which engages the protective hood in engagement with the receiving means on Neck portion of the power tool to hold, at least in principle can support the guard at any point.
  • the loading or locking means acts on the edge part of the protective hood.
  • edge part of the protective hood is bent radially inwards in the direction under the grinding tool and the recesses or depressions are formed in the cranked region.
  • the recesses or depressions preferably on the edge part of the protective hood, can be advantageously formed by embossing.
  • the recesses or depressions are formed on the edge part of the protective hood, specifically on a free edge section.
  • the recesses or depressions can be produced very effectively by embossing, that is, by deforming processes.
  • the mentioned loading or locking means is preferably spring-biased and thus loads the protective hood in the direction of its intended mounting position.
  • the loading or locking means engages in the axial and / or radial direction in recesses or Recesses in the disc-shaped part or in the edge part of the protective hood.
  • the loading or locking means may comprise a manually and tool-operable engaging member according to a preferred embodiment, which is engageable by pressing out of engagement with the protective cover, so that the protective cover rotatable and then detachable from the tool device.
  • the protective cover can be removed without the need to disassemble the grinding tool from the tool spindle.
  • the disc-shaped part of the protective hood has an open-edged recess and can be pushed in its intended position to a neck portion of the power tool substantially in its plane and in the deferred position by further means which preferably engage radially on the outside of the protective hood, is determinable.
  • an inherent inventive idea is seen.
  • FIG. 1 shows a partial sectional view of a gear head 4 of a tool according to the invention in the form of an angle grinder 2.
  • a motor shaft 6 is further indicated with a pinion 8, which forms an angular gear assembly together with a ring gear 10.
  • the ring gear 10 is exemplified integrally formed with a tool spindle 12, which advantageously reduces the axial space of the angular gear assembly, but is not mandatory.
  • a grinding tool 16 On a threaded portion 14 of the tool spindle 12, a grinding tool 16 is pushed; it lies axially against a support flange portion 18 of the tool spindle 12 and is fixed against rotation by a clamping nut 20 against the tool spindle 12.
  • a protective hood 22 is shown in its mounting position according to the invention on a neck portion 24 of the angle grinder 2.
  • the protective cover 22 is also in the Figures 2 and 3 shown in perspective. It comprises an open-edged recess 26, which detects a circumferential angle of at most 180 °.
  • This recess 26 is formed centrally in a disc-shaped part 28 of the protective cover 22.
  • the disk-shaped part 28 is adjoined radially on the outside by an edge part 30, which is bent out of the plane of the disk-shaped part 28. How out FIG. 1 it can be seen forms the edge portion 30 the disc-shaped part 28 is not exactly a right angle, but the angle is slightly larger.
  • the edge portion 30 is again bent radially inward and engages under the grinding tool 16 with this cranked portion 32.
  • recesses 34 are formed in the circumferential direction 36 consecutively.
  • the recesses 34 are formed by imprints, ie by a material-displacing deformation of the cranked region 32.
  • a circumferentially in the example shown continuous groove 38 is formed whose groove width substantially corresponds to the thickness of the edge-open recess 26 bounding edge portion 42 of the disc-shaped part 28 of the protective cover 22.
  • the protective hood in the direction of arrow 44 ( FIG. 2 ), slidable on the neck portion 24, so that the edge portion 42 of the disc-shaped part 28 of the guard can engage in this groove 38.
  • the protective cover 22 is pushed onto the neck section 24 in the plane of its disk-shaped part 28, that is to say in the radial direction.
  • the guard 22 can then be engaged with the groove 38 in the circumferential direction 36 in the final in FIG. 1 Turn shown rotational position.
  • a loading or locking means 46 is provided, which cooperates in the exemplary but preferably shown case with the cranked portion 32 of the edge portion 30 of the guard 22 by the loading or locking means 46 in one of Recesses 34 engages.
  • the load or locking means pushes 46, the protective cover 22 radially inward and prevents so that the edge portion 42 of the disc-shaped part 28 of the protective hood 22 is disengaged from the groove 38.
  • the loading or locking means 46 comprises a contact region 48 which rests radially outward against the edge portion 30 of the protective cover 22 under spring bias radially inward.
  • the loading or locking means 46 comprises in the illustrated case an engagement member 50 which is pivotable in the manner of a rocker relative to a bearing member 52 and is spring-biased by a spring 54.
  • This training charged the engaging member 50 in the direction of engagement with the recesses 34 in the cranked portion 32 of the edge portion 30 of the guard 22.
  • the engaging member 50 presses with its aforementioned abutment portion 48 radially inwardly against the edge portion 30 of the guard 22.
  • Dasiquess or blocking means 46 or its spring-biased engagement member 50 can be manually deflected, so that the engagement member 50 is released from the recesses 34 and so the guard 22 in the circumferential direction 36 is rotatable. For releasing the edge portion 30 is completely rotated from the influence of the loading or locking means 46 and can then be withdrawn against the direction of the arrow 44 of the neck portion 24 of the power tool.
  • the inventive construction can be an overall very flat design arrangement of the gear head of the power tool and the guard realize.

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)
EP20090014399 2008-11-20 2009-11-18 Appareil de meulage d'angle doté d'un capot protecteur Active EP2189244B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810059249 DE102008059249B4 (de) 2008-11-20 2008-11-20 Winkelschleifgerät mit Schutzhaube

Publications (3)

Publication Number Publication Date
EP2189244A2 true EP2189244A2 (fr) 2010-05-26
EP2189244A3 EP2189244A3 (fr) 2010-07-28
EP2189244B1 EP2189244B1 (fr) 2014-11-05

Family

ID=42026712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090014399 Active EP2189244B1 (fr) 2008-11-20 2009-11-18 Appareil de meulage d'angle doté d'un capot protecteur

Country Status (2)

Country Link
EP (1) EP2189244B1 (fr)
DE (1) DE102008059249B4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12403563B2 (en) * 2022-11-24 2025-09-02 Makita Corporation Power tool
US12558767B2 (en) 2022-11-24 2026-02-24 Makita Corporation Power tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009053614B4 (de) 2009-11-17 2012-02-09 Metabowerke Gmbh Motorisch angetriebenes Winkelschleifgerät
EP2821180A1 (fr) 2013-07-04 2015-01-07 Metabowerke GmbH Machine-outil dotée d'un capot de protection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19841409C1 (de) 1998-09-10 2000-02-10 Metabowerke Kg Elektrohandwerkzeug mit einer Schutzhaube
DE10158334C1 (de) 2001-11-28 2003-02-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit Schutzhaube
DE10235923B4 (de) 2002-08-06 2006-04-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit einer Schutzhaube
EP1908549A1 (fr) 2006-10-07 2008-04-09 Metabowerke GmbH Outil motorisé portatif, en particulier une meuleuse d'angle, avec un capot protecteur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969856A (en) * 1973-09-25 1976-07-20 Andreas Stihl Maschinenfabrik Adjustable protective hood for a rotary tool
DE4423889C1 (de) * 1994-07-07 1995-06-22 Atlas Copco Elektrowerkzeuge Schutzhaube für eine Handwerkzeugmaschine
GB2329440A (en) * 1997-09-23 1999-03-24 Liu Wun Hui Front shield of power sanding machine
DE202005009030U1 (de) * 2005-06-09 2005-08-25 Festool Gmbh Handschleifmaschine mit einem Schleifteller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19841409C1 (de) 1998-09-10 2000-02-10 Metabowerke Kg Elektrohandwerkzeug mit einer Schutzhaube
DE10158334C1 (de) 2001-11-28 2003-02-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit Schutzhaube
DE10235923B4 (de) 2002-08-06 2006-04-20 Metabowerke Gmbh Elektrohandwerkzeuggerät mit einer Schutzhaube
EP1908549A1 (fr) 2006-10-07 2008-04-09 Metabowerke GmbH Outil motorisé portatif, en particulier une meuleuse d'angle, avec un capot protecteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12403563B2 (en) * 2022-11-24 2025-09-02 Makita Corporation Power tool
US12558767B2 (en) 2022-11-24 2026-02-24 Makita Corporation Power tool

Also Published As

Publication number Publication date
EP2189244B1 (fr) 2014-11-05
DE102008059249A1 (de) 2010-05-27
DE102008059249B4 (de) 2014-09-11
EP2189244A3 (fr) 2010-07-28

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