EP2262614A1 - Machine-outil portative, en particulier meuleuse manuelle - Google Patents

Machine-outil portative, en particulier meuleuse manuelle

Info

Publication number
EP2262614A1
EP2262614A1 EP09722761A EP09722761A EP2262614A1 EP 2262614 A1 EP2262614 A1 EP 2262614A1 EP 09722761 A EP09722761 A EP 09722761A EP 09722761 A EP09722761 A EP 09722761A EP 2262614 A1 EP2262614 A1 EP 2262614A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
tool according
spring element
clamping
receiving opening
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
EP09722761A
Other languages
German (de)
English (en)
Other versions
EP2262614B1 (fr
Inventor
Balazs Bogardi
Roland Kaplar
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
Publication of EP2262614A1 publication Critical patent/EP2262614A1/fr
Application granted granted Critical
Publication of EP2262614B1 publication Critical patent/EP2262614B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety 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
    • B24B55/04Protective covers for the grinding wheel
    • B24B55/05Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028Angle tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/06Grinders for cutting-off
    • B24B27/08Grinders for cutting-off being portable

Definitions

  • Hand tool in particular hand-guided grinding machine
  • the invention relates to a hand tool, in particular a hand-held grinding machine such. an angle grinder, according to the preamble of claim 1.
  • EP 0 583 270 B1 describes a hand tool machine embodied as an angle grinder, the rotatably driven tool of which is overlapped by a protective hood, which is releasably fastened to a housing-fixed clamping neck of the machine tool by means of a locking device.
  • the locking device can be positioned and locked in different angular positions relative to the housing.
  • the locking device comprises an annular body with a locking lug, which can be latched into associated recesses on the clamping neck. In the circumferential direction are several
  • Recesses provided which allow different angular positions of the protective cover relative to the housing.
  • the invention is based on the object to provide a hand tool with simple constructive measures, the protective cover is easy to assemble safely manner. This object is achieved with the features of claim 1.
  • the dependent claims indicate expedient developments.
  • the hand tool according to the invention which is in particular a hand-held grinding machine, such as e.g. an angle grinder is, has a rotatable tool covering protective hood which is detachably connected to a support member of the power tool and has a central receiving opening for receiving the support member or a connected to the support member portion.
  • a rotatable tool covering protective hood which is detachably connected to a support member of the power tool and has a central receiving opening for receiving the support member or a connected to the support member portion.
  • At the receiving opening bounding in the protective hood opening wall at least one radially projecting into the receiving opening clamping projection is formed, which lies in the mounted position in a clamping groove, which between the support sleeve on
  • Support member and a base portion is formed on the support member.
  • the clamping projection can be inserted into the clamping groove, the support piece has a clamping projection associated with the clamping recess.
  • the support piece is inserted axially into the central recess in the protective hood, such that the clamping projection on the protective hood lies in a line with the clamping recess on the support member.
  • a relative rotation is performed between guard and support member, whereupon the clamping projection is displaced in the clamping groove in the circumferential direction and the clamping projection comes into disengagement with the clamping recess on the support member.
  • Guard are no longer axially withdrawn from the support member, it is achieved in the axial direction a positive connection between the guard and support member.
  • Another advantage is the fact that the holding forces between guard and support member act in the axial direction, whereas no radial forces to support the weight of the support hood are required.
  • the support member forms a bearing flange for supporting a spindle or tool shaft on which the tool is held and which usually has a
  • the bearing flange in addition to receiving and supporting the tool shaft, the bearing flange also has the function of carrying the protective cover.
  • a plurality of clamping recesses distributed over the circumference are introduced into the support stub, which opens up the possibility of locking the protective hood in different angular positions. Furthermore, it may be appropriate to provide a plurality of circumferentially distributed clamping projections on the receiving opening on the guard, which lie in the mounted position in the clamping groove, so that distribute the holding forces over a larger number of such clamping projections.
  • the protective cover is advantageously secured by a spring element, which expediently has a locking cam, which projects latching into a latching recess, which is introduced into the opening opening bounding the receiving opening of the protective hood.
  • the spring element is supported here between the support part and the protective cover, so that the protective hood is subjected to a force only in the axial direction by the spring element.
  • the detent cam on the spring element may optionally also be used the detent cam on the spring element by blocking with the engagement of the locking cam at the same time the rotational movement of the guard.
  • the spring force of the spring element causes the protective hood is held in its axial and rotational position and that the locking cam does not accidentally slip out of the recess. It thus acts of the
  • the securing of the spring element takes place, for example, in that the spring element is supported on the support member, in particular screwed to the support member.
  • the spring force of the spring element acts in the axial direction, by the protective cap axially pushed away from the support member by the spring force and thus the locking cam on the spring element is pressed into the associated recess.
  • the latching recess is located directly on the central receiving opening in the protective hood, the latching recess is consequently as a radial cut into the receiving opening limiting
  • Opening wall of the guard formed. It may be expedient to position the latching recess immediately adjacent to a clamping projection.
  • a plurality of recesses are provided distributed over the circumference, in particular in each case a detent recess in addition to a clamping projection.
  • the spring element is preferably flat, in particular as a spring clip, which is provided with angled end portions, such that a central portion of the spring element abuts either the protective hood or the support member and at least one of the end portions of the spring element is supported on the other component.
  • FIG. 1 is a sectional view of an angle grinder designed as a hand tool with a held on a bearing flange guard, which engages the rotating tool,
  • FIG. 2 is a perspective detail view of the protective hood, shown from above,
  • FIG. 3 is a perspective view of the protective hood in a view from below
  • Fig. 4 is a perspective view of the bearing flange having an axially projecting support sleeve, which in the mounted position in the central
  • FIG. 6 is a spring element designed as a spring element which secures the protective cover on the bearing flange in the mounted position, shown in a perspective view,
  • Bearing flange mounted guard including the spring clip
  • FIG. 10 is a perspective view of the inside of the mounted protective hood
  • Fig. 11 is a similar representation as Fig. 10, but in a partially transparent view with recognizable spring clip.
  • Drive motor 4 has an armature shaft 5, whose rotational movement is transmitted via a gear 6 in the gear housing 3 to the tool shaft 7. This is rotatably mounted in a bearing flange 9, which is connected to the transmission housing 3. On the bearing flange 9 also a rotatable tool 8 cross guard 10 is held.
  • the protective cover 10 is made of plastic, for example, as well as the motor housing 2, whereas the transmission housing 3 may for example consist of a light metal such as aluminum or possibly also of plastic.
  • the protective cover 10 is shown in individual representation.
  • a central receiving opening 11 is introduced, whose inner diameter is denoted by reference numeral 15 and which serves to secure the guard on the power tool.
  • the receiving opening 11 immediately limiting and surrounding Opening wall 12 are several, distributed over the circumference recesses 14 introduced, which are open to the central receiving opening 11 and based on the inner diameter 15 extend radially outward.
  • a plurality of likewise distributed over the circumference clamping projections 13 are provided, which are integrally formed with the opening wall 12 and extend radially inwardly, such that the free end face of the clamping projections 13 is directed radially further inward than the inner diameter 15th
  • the clamping projections 13 may have a different width - seen in the circumferential direction - have. Overall, five clamping projections 13 are arranged distributed over the circumference, of which two clamping projections with a smaller width and three
  • Clamping projections are formed with greater width.
  • the clamping projections 13 of greater width are arranged at 90 "-Winkelabstand to each other, the clamping projections of smaller width are distributed in the remaining semicircle at 60" -Winkelabstand. In principle, however, deviating angular sizes also come into consideration.
  • the recesses 14 are located immediately adjacent and on both sides of each clamping projection 13 lesser width. In addition, two further locking recesses 14 are arranged, which are located approximately in the middle of the angle segment between a wider clamping projection and a narrower clamping projection. Overall, six recesses 14 are distributed over a semicircle provided.
  • the opening wall 12 including the clamping projections 13 and the recesses 14 is formed axially raised relative to the surrounding walls of the protective cover 10.
  • the bearing flange 9 which forms a supporting part has a cylindrical support stub 17 which extends axially over a likewise cylindrical bearing stub 17
  • Base section 16 rises and is formed integrally therewith.
  • the base portion 16 is integrally formed with a radially enlarged mounting plate 20 having recesses for mounting the bearing flange in the radially outer region.
  • a bearing 21 is accommodated in the bearing flange 9, which serves for the rotatable mounting of the tool shaft or spindle.
  • the bearing 21 extends to the base portion 16, the bearing 21 does not reach to the clamping groove 18th
  • the spring element 22 consists of a middle, strip-shaped section 23 and two adjoining end portions 24 and 25, of which the first end portion 24 angled and the second, opposite end portion 25 is bent, which is parallel to the central portion 23.
  • a locking cam 26 which is positioned opposite to the direction of cranking or to the angled direction of the end portions 24 and 25 and rises above the top of the central portion 23. This Locking cam 26 engages in the mounted position in engagement with one of the recesses 14 in the region of the central receiving opening 11 in the protective hood 10 (see FIGS. 2 and 3).
  • a recess is introduced, which serves for attachment, for example by means of a screw on the bearing flange.
  • bearing flange 9, protective cover 10 and spring element 22 are shown in the assembled, assembled position.
  • the spring element 22 is connected with its bent portion 25 fixed to the mounting plate 20 of the bearing flange 9.
  • the central portion 23 of the spring element 22 abuts the protective hood 10.
  • the angled end portion 24 abuts the mounting plate 20 as well as the bent portion 25.
  • the locking cam 26 protrudes into the mounted position in one of the recesses 14, which are introduced into the opening wall 12 of the protective hood 10.
  • the position of the spring element 22 is thereby stabilized.
  • an angular locking of the protective hood 10 is achieved via the projecting locking cam 26.

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)
  • Sawing (AREA)
  • Harvester Elements (AREA)

Abstract

Machine-outil portative (1) comportant un couvercle de protection (10) qui est relié de manière amovible à une partie porteuse de la machine-outil portative. Sur une paroi d'ouverture (12) délimitant une ouverture de réception (11) du couvercle de protection est formée une saillie de serrage (13) orientée radialement vers l'intérieur, la partie porteuse sur laquelle est fixé le couvercle de protection présentant un épaulement porteur (17) qui peut être engagé dans l'ouverture de réception et dans lequel est façonné un évidement de serrage (19) pour la saillie de serrage.
EP09722761A 2008-03-18 2009-03-13 Machine-outil portative, en particulier meuleuse manuelle Active EP2262614B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810000732 DE102008000732A1 (de) 2008-03-18 2008-03-18 Handwerkzeugmaschine, insbesondere handgeführte Schleifmaschine
PCT/EP2009/052972 WO2009115459A1 (fr) 2008-03-18 2009-03-13 Machine-outil portative, en particulier meuleuse manuelle

Publications (2)

Publication Number Publication Date
EP2262614A1 true EP2262614A1 (fr) 2010-12-22
EP2262614B1 EP2262614B1 (fr) 2012-10-10

Family

ID=40886590

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09722761A Active EP2262614B1 (fr) 2008-03-18 2009-03-13 Machine-outil portative, en particulier meuleuse manuelle

Country Status (5)

Country Link
EP (1) EP2262614B1 (fr)
CN (1) CN101977734B (fr)
DE (1) DE102008000732A1 (fr)
RU (1) RU2507052C2 (fr)
WO (1) WO2009115459A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002548B4 (de) * 2008-06-20 2021-11-11 Robert Bosch Gmbh Werkzeugmaschine, insbesondere Handwerkzeugmaschine
CN201711607U (zh) * 2010-05-11 2011-01-19 南京德朔实业有限公司 用于振荡式电动工具的工作元件
CN103158071B (zh) * 2011-12-14 2016-03-09 株式会社牧田 研磨机
US20170057075A1 (en) * 2014-02-28 2017-03-02 Hitachi Koki Co., Ltd. Electric tool
DE202019104156U1 (de) * 2019-07-29 2020-11-02 C. & E. Fein Gmbh Getriebekopf und Handwerkzeugmaschine
DE102020210634A1 (de) 2020-08-20 2022-02-24 Robert Bosch Gesellschaft mit beschränkter Haftung ªHandwerkzeugmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3633943A1 (de) * 1986-10-04 1988-04-07 Licentia Gmbh Mit dem spindelhals eines handgefuehrten winkelschleifers oder dergleichen elektrowerkzeug vereinigbare schutzhaube
RU2027584C1 (ru) * 1990-03-14 1995-01-27 Вагиз Нургалиевич Абраров Электростатическое закрепляющее устройство
DE4113641A1 (de) * 1991-04-26 1992-10-29 Bosch Gmbh Robert Handwerkzeugmaschine
RU2152862C2 (ru) * 1998-08-10 2000-07-20 Закрытое Акционерное Общество "Энерпред" Ручная шлифовальная машина
DE10259520A1 (de) * 2002-12-19 2004-07-01 Robert Bosch Gmbh Elektrohandwerkzeugmaschine
DE10343060A1 (de) * 2003-09-16 2005-04-07 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube
ATE457849T1 (de) * 2006-10-07 2010-03-15 Metabowerke Gmbh Elektrohandwerkzeuggerät, insbesondere ein winkelschleifer mit einer schutzhaube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009115459A1 *

Also Published As

Publication number Publication date
RU2507052C2 (ru) 2014-02-20
RU2010142399A (ru) 2012-04-27
CN101977734A (zh) 2011-02-16
EP2262614B1 (fr) 2012-10-10
DE102008000732A1 (de) 2009-09-24
WO2009115459A1 (fr) 2009-09-24
CN101977734B (zh) 2013-05-29

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