EP2097220A1 - Machine-outil manuelle pour un outil rotatif à capot protecteur - Google Patents

Machine-outil manuelle pour un outil rotatif à capot protecteur

Info

Publication number
EP2097220A1
EP2097220A1 EP07803583A EP07803583A EP2097220A1 EP 2097220 A1 EP2097220 A1 EP 2097220A1 EP 07803583 A EP07803583 A EP 07803583A EP 07803583 A EP07803583 A EP 07803583A EP 2097220 A1 EP2097220 A1 EP 2097220A1
Authority
EP
European Patent Office
Prior art keywords
neck
hand tool
tool according
machine
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.)
Granted
Application number
EP07803583A
Other languages
German (de)
English (en)
Other versions
EP2097220B1 (fr
Inventor
Florian Esenwein
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 EP2097220A1 publication Critical patent/EP2097220A1/fr
Application granted granted Critical
Publication of EP2097220B1 publication Critical patent/EP2097220B1/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
    • 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
    • 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 hand tool according to the preamble of claim 1.
  • the protective covers cover the workpiece only in segments, for example in an angular range of about 180 °, to leave the operator sufficient freedom of work on the rotating tool and workpiece.
  • it is known in the prior art to detachably secure the protective hood for example by means of a tensioning band arranged on the protective hood.
  • solutions are known in which the clamping band is expanded and reduced by loosening and tightening a clamping screw in the circumference, so that the protective hood is held by a clamping action on the machine neck.
  • clamping lever is adjustable in scope, so that the guard can be solved by a simple lifting movement of the lock and can be made rotatable on the clamping neck.
  • recesses are formed on the machine clamping neck, in which engages a mounted on the clamping band or the clamping lever of the clamping band pawl.
  • the object of the invention is to present a further development, which avoids the disadvantages mentioned and allows greater protection for the operator of the power tool with greater comfort.
  • a hand tool machine for a rotating, preferably disc-shaped tool, with a machine housing having a machine neck to which a protective cover for at least partially covering the tool is releasably attached, wherein the protective hood has a guard neck and provided for releasably securing a clamp and wherein at least one recess for engagement of the engagement element is arranged / formed on the guard collar and on the guard neck and on the machine neck to form a rotation safeguard acting between the machine neck and the guard.
  • the protective hood is consequently a component which is separate from the hand tool machine, with the clamping clamp in turn being a separate component for the protective hood.
  • the guard has a guard neck which attaches to the machine housing is, in particular slipped over the engine neck formed on the machine housing and can be released from there again, and the clamp in turn serves to attach the protective hood neck.
  • the tension clamp has an engagement element which can cooperate with at least one recess on the guard neck or on the guard neck and on the machine neck. Upon engagement of this engagement element in the recess, a rotation of the guard on the machine neck is prevented because the engagement element passes through the guard neck, or but passes through the guard neck and also engages in a formed on the machine neck recess, so that the
  • Guard neck is locked over the engagement of the engagement element in the at least one recess.
  • the clamp is formed as a separate component and fixed to the machine housing.
  • the separate training of the clamp and attachment to the machine housing frees the clamping hood of the clamping mechanism as such.
  • the clamping hood on the one hand easier to handle, on the other hand, this embodiment allows to use the clamp in a specific, defined manner and about to attach to the machine housing, regardless of the position of the protective hood relative to the machine housing.
  • the guard neck is encompassed by the clamp.
  • the clamp thus engages around the guard neck more or less completely, depending on the design of the clamp as a closed or open ring, and thus causes the determination of the guard over the attached guard neck.
  • the protective neck surrounds or partially engages around the machine neck.
  • the protective neck neck therefore comprises the machine neck completely or at least partially.
  • the machine neck and / or the guard neck has a compensating element, in particular a ring consisting of elastic material, in particular rubber, in order to compensate for tolerances between the guard neck and the machine neck.
  • a compensating element in particular a ring consisting of elastic material, in particular rubber, in order to compensate for tolerances between the guard neck and the machine neck.
  • the guard neck is designed as a ring element or as a ring segment element.
  • a ring element of the guard neck is arranged annularly on the protective hood, in particular concentric with the outer circumference of the circular segment, which is covered by the protective hood.
  • a ring segment element of the guard neck is only partially formed, so not as a solid ring, preferably in such a way that it covers the range in the angular range, which is also covered by the guard itself. This results in a particularly large freedom in arrangement and determination of the protective hood relative to the machine housing.
  • the clamping collar has a clamping device which reduces its diameter during clamping.
  • This clamping device can be configured for example by a screw with a corresponding mating thread, wherein the clamp is in turn designed as an open ring, which is closed by the clamping device.
  • the clamp has an engagement element and a clamping device. Engaging element and
  • Engaging means are therefore different.
  • the engagement element is used to fix the guard on the machine neck against axial rotation, whereas the clamping device causes a fixation in any respect, especially against slipping from the machine neck.
  • the clamping device is designed as a lever having the engagement element. The circumferential enlargement and reduction of the clamp is thus carried out via a lever known from the prior art, which opens or closes the clamp designed as an open ring, but wherein the lever has the engagement element, the engagement element in particular on the lever formed on the underside or on this is arranged.
  • the lever for fixing the engagement position of the engagement element is spring-loaded.
  • the arranged on the lever engaging element is therefore always engaged in the at least one recess, unless the lever is opened against its spring load. In this way, an unintentional adjustment or removal of the protective hood is not possible because it must be decidedly counteracted against the spring load, for example, but not necessarily, at the same time, the clamping device can be opened.
  • the engagement element is arranged on an engagement lever, and the tensioning device can be actuated via a tensioning lever.
  • the engagement element consequently has a separate engagement lever which operates exclusively the engagement element, without simultaneously actuating or displaying the tensioning device.
  • the clamping device is in this case actuated in another way, for example via a clamping lever.
  • the engagement element is a screw. This embodiment is particularly recommended for embodiments in which the protective hood is to be adjusted with a tool and / or where frequent adjustment of the guard relative to the machine housing is not required, so that the execution with a lever-operated engagement element is not required.
  • the clamping clamp has at least one fastening tab, which preferably extends radially and serves for fastening to the machine housing.
  • a fastening tab may be formed integrally with the clamp or disposed thereon, in particular fixed; in a preferred embodiment it extends radially on the outside of the clamping collar and has a bore or other device in order to fix it and the clamping collar to the machine housing, wherein it is very particularly preferably fastened by screws to the machine housing, which is present anyway on the machine housing are, for example, with screws that hold a gear cover.
  • an at least partially circumferential securing groove is formed on the machine neck, which with at least one formed on the guard neck / Nuteingriffelement arranged to form a
  • the Nuteingriffelement is therefore introduced when attaching the protective hood neck on the machine neck in the at least partially circumferential locking groove and thereby prevents the protective cover unintentionally detached from the machine neck and slips off.
  • the groove on a groove insertion in particular one which is substantially perpendicular to the groove, whereby the Nuteingriffelement when slipping the guard neck on the machine neck can be brought in the simplest way in the engagement of the groove.
  • the Nuteingriffelement is a cam or cam. Such are particularly easy to manufacture, which in a simple and inexpensive way training on the guard neck is possible.
  • FIG. 1 shows a protective hood with a series of recesses having guard neck
  • Machine neck which has a corresponding sequence of recesses
  • FIG. 3 is a cross-sectional plan view of a machine neck in the assembled state, encompassed by a guard neck and a tension clamp.
  • Figure 1 shows a protective cover 1 for a hand tool, not shown here, namely an angle grinder.
  • the protective cover 1 is configured in the manner of a pot section 2, with a protective cover bottom 3 and a protective cover edge 4.
  • the protective cover edge 4 is designed substantially as a ring section 5.
  • the one-sided adjoining this Protective cover bottom 3 essentially describes a semicircle 6, wherein concentric to an imaginary center of the semicircle 6 a protective hood neck 7 is formed, which has a guard neck wall, which is substantially perpendicular to the protective cover bottom 3, 5 and the guard neck 7 in turn semicircular around the imaginary center of the semicircle 6 is formed.
  • the guard neck 7 is formed as a ring element 9.
  • the guard neck 7 has, distributed on its circumference 12, a sequence 13 of recesses 14 which are substantially equidistant, ie, have the substantially same distance d between them. Starting from the imaginary center of the protective hood neck 7 (of the ring element 9) is formed by the sequence 13 of recesses 14, the distance d
  • Figure 2 shows a machine neck 15 which is arranged on a Getriebeabdeckplatte 16, in particular integrally formed therewith.
  • the gear cover plate closes an angle gear 17 of a
  • the machine neck 15 has a Maschinenhaiswandung 20, in the outer peripheral side, a sequence of recesses 14 is introduced equally spaced.
  • the recesses 14 are formed as recesses 21, these consequently do not go through to a Maschinenhaisinnenseite 22 by.
  • a tool spindle for receiving a tool to be covered by the protective cover not shown here.
  • FIG. 3 shows the machine neck 15 and the protective guard neck 7 embracing it, and a clamping collar 23 embracing it.
  • the clamping collar 23 has a tensioning device 24 which reduces its diameter for coarse fixing or initial fixing; this is designed here in a simple manner as a bolt tensioning device 25.
  • On the outer circumference of the clamp 23 is in bearing brackets 26, a lever 35 27 with an end formed on this engaging element 28th rotatably mounted about a vertically disposed within the bearing plates 26 axis of rotation 29.
  • recesses 14 are arranged for cooperation, namely the engagement of the engagement element 28, which lie substantially at the same radii starting from an imaginary center of the machine neck 15 and thus include the same partial angle ⁇ .
  • the engagement element 28 can consequently penetrate the recesses 14, wherein the recesses 14 on the machine neck 15 as recesses 21, so not continuous, are formed, and thereby lock the guard neck 7 relative to the machine neck 15 and set.
  • By loosening, so excluding the engaging member 28 from the recesses 14 by operating an end portion 30 of the lever 27 of the guard neck 7 is rotatable within this arrangement, so that it is arranged at a different angular distance ⁇ relative to the other components and by releasing the lever 27 again can be locked.
  • the lever 27 is spring-loaded at its end portion 30, wherein a coil compression spring 31 is supported on a Hebelend Schemeunterseite 32 on the one hand and on an outer circumference 33 of the clamp on the other.
  • the lever 27 is by the spring force load of the coil spring 31 in a position such that the engagement element 28 engages through the recesses 14 in the recesses 21 and the guard neck is set relative to the other components.
  • the spring loading of the lever 27 may also be effected by other suitable spring designs, such as by gudgeon springs or the like.
  • the engagement element 28 forms in cooperation with the recesses 14 a rotation 34.
  • the anti-rotation 34 acts with the sequence 13 of recesses 14 as a rotating device 35, which can be adjusted by the sequence 13 predetermined angular positions of the protective cover 1 relative to the machine neck 15.

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)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

La présente invention concerne une machine-outil manuelle (19) pour un outil rotatif qui se présente de préférence sous forme de disque. Cette machine-outil comprend un carter de machine (18) qui présente un collet de machine (15) sur lequel un capot protecteur (1) est fixé de façon amovible afin de recouvrir au moins partiellement l'outil. Le capot protecteur (1) présente un collet de capot protecteur (7) et une bride de serrage (23) permettant la fixation amovible. Afin d'assurer un blocage en rotation (34) entre le collet de machine (15) et le capot protecteur (1), un élément d'engagement (28) est monté sur la bride de serrage (23) et au moins un évidement (14) dans lequel s'engage l'élément d'engagement (28) se trouve sur le collet de capot protecteur (7) ou sur le collet de capot protecteur (7) et sur le collet de machine (15).
EP07803583A 2006-11-13 2007-09-21 Machine-outil manuelle pour un outil rotatif à capot protecteur Active EP2097220B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006053303A DE102006053303A1 (de) 2006-11-13 2006-11-13 Handwerkzeugmaschine für ein rotierendes Werkzeug mit Schutzhaube
PCT/EP2007/060046 WO2008058797A1 (fr) 2006-11-13 2007-09-21 Machine-outil manuelle pour un outil rotatif à capot protecteur

Publications (2)

Publication Number Publication Date
EP2097220A1 true EP2097220A1 (fr) 2009-09-09
EP2097220B1 EP2097220B1 (fr) 2010-06-23

Family

ID=38684249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803583A Active EP2097220B1 (fr) 2006-11-13 2007-09-21 Machine-outil manuelle pour un outil rotatif à capot protecteur

Country Status (7)

Country Link
US (1) US7892075B2 (fr)
EP (1) EP2097220B1 (fr)
CN (1) CN101535001B (fr)
AT (1) ATE471788T1 (fr)
BR (1) BRPI0718535A2 (fr)
DE (2) DE102006053303A1 (fr)
WO (1) WO2008058797A1 (fr)

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CN110000697B (zh) * 2018-01-04 2023-04-28 康普技术有限责任公司 箍套抛光夹具及抛光方法
USD945234S1 (en) * 2018-07-26 2022-03-08 Paul Mueller Company Guard for use with a power tool
JP7110025B2 (ja) * 2018-08-07 2022-08-01 株式会社マキタ 電動工具
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Also Published As

Publication number Publication date
EP2097220B1 (fr) 2010-06-23
ATE471788T1 (de) 2010-07-15
WO2008058797A1 (fr) 2008-05-22
CN101535001A (zh) 2009-09-16
DE502007004221D1 (de) 2010-08-05
DE102006053303A1 (de) 2008-05-15
US20090209184A1 (en) 2009-08-20
BRPI0718535A2 (pt) 2013-11-19
CN101535001B (zh) 2011-04-13
US7892075B2 (en) 2011-02-22

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