EP1741521A1 - Outil portatif avec bonnet de protection - Google Patents

Outil portatif avec bonnet de protection Download PDF

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Publication number
EP1741521A1
EP1741521A1 EP06116064A EP06116064A EP1741521A1 EP 1741521 A1 EP1741521 A1 EP 1741521A1 EP 06116064 A EP06116064 A EP 06116064A EP 06116064 A EP06116064 A EP 06116064A EP 1741521 A1 EP1741521 A1 EP 1741521A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
clamping means
device housing
tool according
counter
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
EP06116064A
Other languages
German (de)
English (en)
Other versions
EP1741521B1 (fr
Inventor
Louis Widmer
Christian Koschel
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1741521A1 publication Critical patent/EP1741521A1/fr
Application granted granted Critical
Publication of EP1741521B1 publication Critical patent/EP1741521B1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the invention relates to a hand tool, in particular an angle grinder, with a motor housing a device housing.
  • a hand tool in particular an angle grinder
  • a motor housing a device housing.
  • a device housing for this protrudes at a housing opening out of the motor driven by a drive shaft tool shaft, on which a disk-shaped tool by means of a tool holder can be fixed.
  • a protective cover for partially covering the tool can be fixed to the device housing.
  • the protective hood is held by a relative to the device housing rotationally fixed axial support in the direction of the drive axis, but it is rotatable about the drive axis.
  • a rotary lock is provided on the device housing, which has a locking position in which it is in the protective hood with locking elements of the protective hood engaged. From this locking position out the rotary lock against the force of a spring in an unlocked position is movable to set the guard in different rotational positions relative to the device housing can.
  • Such hand tooling can be used for various applications, such as grinding or cutting work.
  • the mounting arrangement allows for each application to set a suitable rotational position of the guard relative to the device housing.
  • the twist lock ensures a secure fixing of the guard in the selected rotational position.
  • a disadvantage of the known hand tool that results in a high assembly cost due to the high number of elements that is required for the axial and radial fixing of the protective cover on the device housing.
  • the present invention has for its object to avoid the disadvantages mentioned in a hand tool with protective hood and to simplify the assembly.
  • the object is achieved in that the Axialabstützung and the twist lock are components of an independently of the device housing and the protective cover preassembled mounting arrangement having a detachable connection with the device housing.
  • the elements required for the complete definition of the protective cover relative to the device housing form a pre-assembly group, which can be manufactured and pre-assembled separately from the actual hand-held power tool and the protective cover.
  • the pre-assembly can be attached as a closed unit on the device housing, whereby the assembly cost is significantly reduced.
  • the mounting arrangement comprises a support element on which the axial support and the rotation lock are completely, i. in all directions and thus captive, can be fixed.
  • a stable connection of the two elements to each other with the interposition of the support element can be achieved with inexpensive to be produced form of the axial support and the rotation lock.
  • all necessary for the determination of the guard elements form a pre-assembled unit that can be manufactured and transported separately from the other hand tool.
  • the carrier element has first clamping means which cooperate with corresponding first counter clamping means of the axial support. This allows a particularly simple pre-assembly of the axial support on the support element.
  • the fastening arrangement has an abutment element which can be fixed completely to the carrier element with the interposition of the rotational locking.
  • multi-part rotary locks for example, have one or more locking body and at least one acting as a locking means or a bias generating spring element can be easily and captive held on the support member.
  • the carrier element has second clamping means which cooperate with corresponding second counter clamping means of the counter bearing element.
  • the pre-assembly of the mounting arrangement is further simplified.
  • the second clamping means are advantageously formed by elastic screw domes of the support element and the second counter-clamping means by receiving openings of the counter-bearing element, wherein the receiving openings for producing a clamping action each have a smaller free cross section than a respective cross section of the screw domes.
  • the second clamping means can take on a further function as a receptacle for fastening screws, whereby a more cost-effective production of the carrier element is achieved.
  • the carrier element is completely formed of an elastic plastic, whereby this is simpler and less expensive to produce together with the clamping means formed on it.
  • the fastening arrangement is releasably secured via a plurality of screw connections on the device housing, which are arranged around the tool shaft.
  • a stable releasable connection of the mounting arrangement is made possible on the device housing, which can be easily replaced, for example, for repair purposes or for attachment of another protective cover.
  • Fig. 1 shows an exploded view of a hand tool 2 in the form of an angle grinder, with a device housing 4, in which a motor 6 is housed, which drives a tool shaft 8 about a drive axis A in a manner not shown, at a housing opening 10 from the Appliance housing 4 protrudes out.
  • a tool holder 12 is provided, which serves for fixing a disk-shaped tool, not shown, such as a grinding or cutting disc.
  • a fastening arrangement designated as a whole with 20 can be attached to this device neck 14, by means of which a protective cover 22 can be fixed to the device neck 14.
  • the screws 18 are screwed into corresponding holes 24 which are provided on the base plate 16.
  • the mounting assembly 20 has an annular support member 26 which is formed entirely of elastic plastic. From this extend to one side, two first clamping means 28 in the form of cylindrical clamping bodies. These act, as shown by the arrows K1, together with corresponding first counter-clamping means 30 in the form of bores of an axial support 32 acting as annular plate.
  • the first clamping means 28 and the first counter-clamping means 30 are matched to one another in shape and size such that they produce a press fit in the mounted state. In this way, the axial support 32 can be held captive on the carrier element 26.
  • the carrier element 26 For receiving the screws 18, the carrier element 26 has four receiving bores 34, two of which extend through a respective screw mandrel 36a, 36b.
  • the screw mandrel 36a serves as a pivot bearing for a two-armed locking member 38 of a rotary lock 40.
  • the locking member 38 has for this purpose a bearing bore 44 through which the screw mandrel 36a extends therethrough.
  • the twist lock 40 is in addition to the locking part 38 of a leaf spring 42nd
  • the screw domes 36a, 36b which, like the rest of the carrier element 26, are formed from the elastic plastic are used as second clamping means.
  • the screw domes 36a, 36b act, as shown by the arrows K2, together with two second counter-clamping means 46, which are formed in the form of holes on a counter-bearing element 48 acting sheet metal part.
  • the screw domes 36a, 36b have a cross section with an outer diameter a which is slightly larger than an inner diameter b of a free cross section of the second counter clamping means 46, as can be seen from FIG.
  • the rotary lock 40 can be held captive on the carrier element 26.
  • the entire mounting assembly 20 forms a pre-assembly, which can be completely pre-assembled and transported independently of the other hand tool 2, to be subsequently secured by the screws 18 on the device housing 4.
  • the protective hood 22 has a fastening collar 50, from which four cams 52 protrude in the radial direction.
  • the four cams 52 cooperate with four at a inner edge 54 of the Axialabstützung 32 correspondingly arranged and dimensioned radial recesses 56 together as coding. This causes the four cams 52 are only in a single rotational position over 360 ° with respect to the axial support 32 exactly aligned with the four radial recesses 56.
  • the mounting collar 50 can be pushed into the mounting assembly 20 only in this rotational position, to axially fix the guard 22 by subsequent rotation of the mounting assembly 20 in the manner of a bayonet closure.
  • the four cams 52 are no longer in alignment with the radial recesses 56 and thus at least partially engage behind the axial support 32, as indicated in FIG. 2.
  • the fastening arrangement 20 in FIG. 2 with removed abutment element 48 is shown.
  • a plurality of locking elements 60 formed by axially extending recesses 60 are formed on a free edge 58 of the fastening collar 50, which interact with the rotary lock 40.
  • two locking cams 62 inside which are arranged and dimensioned to each other so that they engage in a locking position shown in two of the locking elements 60.
  • the locking member 38 by the leaf spring 42 which is connected to a End is clamped in a corresponding spring retainer 64 of the support member 26, biased in the locking position.
  • the screws 18 may be released and the previous attachment assembly 20 may be replaced with another preassembled attachment assembly 20.

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)
EP20060116064 2005-07-05 2006-06-26 Outil portatif avec bonnet de protection Active EP1741521B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510000085 DE102005000085A1 (de) 2005-07-05 2005-07-05 Handwerkzeuggerät mit Schutzhaube

Publications (2)

Publication Number Publication Date
EP1741521A1 true EP1741521A1 (fr) 2007-01-10
EP1741521B1 EP1741521B1 (fr) 2009-01-21

Family

ID=37036802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060116064 Active EP1741521B1 (fr) 2005-07-05 2006-06-26 Outil portatif avec bonnet de protection

Country Status (2)

Country Link
EP (1) EP1741521B1 (fr)
DE (2) DE102005000085A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140080391A1 (en) * 2012-09-18 2014-03-20 Ingersoll-Rand Company Grinding Tools With Guards
WO2017055125A1 (fr) * 2015-09-29 2017-04-06 Robert Bosch Gmbh Machine-outil portative pourvue d'au moins un élément de contact côté machine
EP3112090A4 (fr) * 2014-02-28 2017-09-27 Hitachi Koki Co., Ltd. Outil électrique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913898A1 (de) * 1989-04-27 1990-10-31 Licentia Gmbh Einrichtung zur axialen sicherung, zum verriegeln und zum drehverstellen der schutzhaube auf dem spannhals von handwerkzeugmaschinen
DE19914855A1 (de) * 1999-04-01 2000-10-05 Metabowerke Kg Handschleifmaschine mit einer in Umfangsrichtung verstellbaren Schutzhaube
DE10115635C1 (de) * 2001-03-23 2002-10-24 Flex Elektrowerkzeuge Gmbh Handwerkzeugmaschine mit einer Schutzhaube
US20050037702A1 (en) 2003-08-11 2005-02-17 Christian Koschel Hood mounting
DE10343060A1 (de) * 2003-09-16 2005-04-07 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5637035A (en) * 1995-06-28 1997-06-10 Milwaukee Electric Tool Corporation Adjustable guard arrangement for power tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913898A1 (de) * 1989-04-27 1990-10-31 Licentia Gmbh Einrichtung zur axialen sicherung, zum verriegeln und zum drehverstellen der schutzhaube auf dem spannhals von handwerkzeugmaschinen
DE19914855A1 (de) * 1999-04-01 2000-10-05 Metabowerke Kg Handschleifmaschine mit einer in Umfangsrichtung verstellbaren Schutzhaube
DE10115635C1 (de) * 2001-03-23 2002-10-24 Flex Elektrowerkzeuge Gmbh Handwerkzeugmaschine mit einer Schutzhaube
US20050037702A1 (en) 2003-08-11 2005-02-17 Christian Koschel Hood mounting
DE10343060A1 (de) * 2003-09-16 2005-04-07 Robert Bosch Gmbh Handwerkzeugmaschine mit Schutzhaube

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140080391A1 (en) * 2012-09-18 2014-03-20 Ingersoll-Rand Company Grinding Tools With Guards
US9352445B2 (en) * 2012-09-18 2016-05-31 Ingersoll-Rand Company Grinding tools with guards
EP3112090A4 (fr) * 2014-02-28 2017-09-27 Hitachi Koki Co., Ltd. Outil électrique
WO2017055125A1 (fr) * 2015-09-29 2017-04-06 Robert Bosch Gmbh Machine-outil portative pourvue d'au moins un élément de contact côté machine
US20180272494A1 (en) * 2015-09-29 2018-09-27 Robert Bosch Gmbh Hand-Held Power Tool Having at Least One Machine-Side Contact Element
US10857645B2 (en) 2015-09-29 2020-12-08 Robert Bosch Gmbh Hand-held power tool having at least one machine-side contact element

Also Published As

Publication number Publication date
DE502006002688D1 (de) 2009-03-12
DE102005000085A1 (de) 2007-01-11
EP1741521B1 (fr) 2009-01-21

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