EP1663575A1 - Handwerkzeugmaschine mit schutzhaube - Google Patents
Handwerkzeugmaschine mit schutzhaubeInfo
- Publication number
- EP1663575A1 EP1663575A1 EP04762465A EP04762465A EP1663575A1 EP 1663575 A1 EP1663575 A1 EP 1663575A1 EP 04762465 A EP04762465 A EP 04762465A EP 04762465 A EP04762465 A EP 04762465A EP 1663575 A1 EP1663575 A1 EP 1663575A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- protective hood
- hand tool
- tool according
- lever
- 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
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 68
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
-
- 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
Definitions
- the present invention is based on a hand tool according to the preamble of claim 1.
- a hand tool which is designed as an angle grinder and is provided with a protective hood, the rotational position of which can be fixed in the circumferential direction with a simple, releasable locking mechanism.
- Whose locking member consists essentially of a leaf spring, the projections for adjusting the protective hood can be brought out of engagement with recesses of the protective hood by hand and whose locking forces are impaired by deformation of the locking member under hard construction site operation.
- the invention with the features of claim 1 has the advantage that a protective hood with associated robust, simple protective hood locking device can be installed on conventional hand-held power tools, in particular angle grinders, with which the protective hood can be reliably fixed in any rotational position.
- the locking lever is arranged transversely to the longitudinal axis of the angle grinder and can be pivoted about an axis arranged essentially parallel to the housing, the movement paths of the locking lever are fixed and changes in the locking characteristics of the protective hood are thus excluded.
- the protective hood can be secured in a non-positive or positive manner in this position.
- the locking lever carries a push button at the free end and at the other end and / or in the middle at least one locking cam which engages in the protective hood and holds this form-fitting, an easy-to-use, robust and accurate locking means is created.
- the locking lever is pivotally mounted on the housing, in particular on the gear housing, the function and assembly of the locking lever can only be achieved by loosening and re-screwing a flange screw.
- the push button of the locking lever extends transversely to the transmission housing and beyond its circumference makes it easily accessible for at least one finger, in particular the index finger of the operating hand that grips the housing in the working position, the protective hood can be adjusted quickly and easily and incorrect operation is prevented.
- the protective hood can be positively engaged with the rigid locking cams, it is possible to position the protective hood in any rotational position in a largely play-free manner and secure against unintentional loosening.
- the gear housing has a flange that can be screwed onto the housing, with one of the flange screws also serving as the axis of rotation of the locking lever, the locking means of the angle grinder protection hood can be easily attached to conventional angle grinders.
- the protective hood has latching openings on a pitch circle for engaging latching cams of the latching lever, a secure, positive locking of the protective hood in predetermined rotational positions with respect to the hand-held power tool is possible.
- the protective hood is made of several parts, the first part being a ring-like collar, in particular with an angled edge area, made of strong material, and the second part being a disk-like base body, the protective hood can be produced from different materials in a particularly cost-effective manner because the parts are independent are easier to edit from each other and the protective hood can be manufactured as a lightweight component.
- the second part namely the protective hood basic body, be made of particularly thin material, because only the collar part absorbs the locking forces between the locking openings and the locking cams of the locking lever.
- the attachment area of the gearbox housing that carries the protective cover can be made of relatively roughly tolerated plastic, because the ring leaf spring Compensates for dimensional deviations or wear in the fastening area.
- the gear housing has a fastening area for the protective hood designed as a cylindrical plastic neck, which belongs to a bearing flange concentrically encompassing the output shaft, can save weight on the gear housing and thus on the entire hand tool, so that the hand tool is more manageable and can be handled without fatigue ,
- FIG. 1 shows the handheld power tool with protective hood in an exploded view
- FIG. 2 shows the hand-held power tool according to FIG. 1 with the protective hood assembled before assembly
- FIG. 3 shows the individual parts of a two-part exemplary embodiment of the protective hood
- FIG. 4 assembles the protective hood according to FIG. 3,
- FIG. 5 shows a second exemplary embodiment of a two-part protective hood — in an exploded view
- FIG. 6 shows the exemplary embodiment according to FIG. 5, assembled
- Figure 7 is a two-part protective hood with plastic collar and metal body and Figure 8 is a one-piece protective hood made of metal.
- FIG. 1 shows the front area of a hand tool 10 designed as an angle grinder, the elongated housing 12 of which defines a longitudinal axis 13 of the hand tool 10.
- a gear housing 14 is flanged to the housing 12, from which an output shaft 16 emerges at right angles to the longitudinal axis 13.
- a grinding wheel At its free end a grinding wheel, not shown, can be fastened, which is encased by a protective hood 43 to protect the operator of the handheld power tool 10 from flying chips or parts of the grinding wheel.
- the gear housing 14 is fastened to the housing 12 with flange screws 18 which engage in flange bores 20 running parallel to the longitudinal axis 13 and it carries a bearing flange 22 which surrounds the output shaft 16 in a ring-like manner.
- the bearing flange 22 is designed in a plate-like manner in the area facing the gear housing 14 and can be connected to the gear housing 14 via a flange screw connection 23 arranged essentially parallel to the output shaft 16.
- the bearing flange 22 has a cylindrical neck 24 emerging at right angles to the longitudinal axis 13, which receives the protective hood 43 on its outer circumference and which, for this purpose, has an annular groove 26 axially approximately centrally, its outer bead-like annular groove limitation 27 being interspersed at regular intervals by axial grooves 28, the corresponding radial cams 46 in the collar 44 are assigned to the protective hood 43 and which - to match one another - can be coupled in a plug-and-turn movement, such as a key-keyhole or bayonet lock system.
- the protective hood 43 consists of a disk-like, crescent-shaped base body 53 with a central hole 55, the outer edge 54 of which is angled and thus runs like a partial cylinder jacket.
- This base body 50 encompasses approximately half the circumference of a circular disk-shaped grinding body, not shown, which is rotatably carried along by the drive shaft 16, as is customary in the case of angle grinders.
- the base body 50 is connected to an annular collar 44 which has an area 45 which is angled laterally outwards in the manner of a hat. This runs parallel to the perforated disk 52 of the base body 50 and concentrically to the central hole 55 of the perforated disk 52.
- the collar 44 can be connected to the base body 50 by gluing, welding, soldering or the like.
- the collar 44 has latching openings 48, into which latching cams 32 of a latching lever 30 fit and enter and thus secure the protective hood 43 against twisting on the gear housing 14.
- the respective different widths and the corresponding height of the radial cams 46 are dimensionally matched to the matching, uniformly wide ring 26 and differently wide axial grooves 28 on the neck 24. It is only possible to guide protective hoods 43 with their collar axially over the neck 24 and to fasten them in a manner suitable for the operation.
- a particularly slotted snap ring-like ring spring 40 has to be pushed axially over the neck 24 by the manufacturer, its spring cam 42 having to be passed through one of the axial grooves 28 and then - if necessary after radial rotation - caulked in the ring groove 26 or by opening or bending fixed in a pocket 41 on the lower edge of the neck 24 and thus secured against loss.
- the protective hood 43 with the radial cams 46 is then guided over the axial grooves 28 of the neck 24 until the radial cams 46 abut the lower edge of the annular groove 26 and the protective hood 43 can only be rotated, the radial cams 46 being laterally inserted into the annular groove 26 in the manner of a bayonet lock enter and hold in there against axial emergence, axially pretensioned and thus kept free of play by the ring spring 40.
- the latching lever 30 On its side remote from the housing, the latching lever 30 has an area with latching cams 32 which are intended to engage in the latching openings 48.
- the locking lever 30 carries at one end a bore which is offset by approximately 90 from the locking cams 32 and through which a flange screw 18 can be guided, for screwing into a specific flange bore 20 and which serves as the pivot axis 34 of the locking lever.
- the locking lever 30 carries a transversely projecting, captively attachable compression spring 36, with which the locking lever 30 is pretensioned on the gear housing 14 so that it always has a minimum force with its cams 32 on the bend 45 of the bracket.
- gens 44 can support and the entry of the locking cams 32 is secured in the locking openings 48.
- the base body 50 of the protective hood 43 has welding holes 53 through which the base body 50 can be welded or soldered to the collar 44 or to the bend 45.
- FIG. 2 shows, like FIG. 1, the three-dimensional view of hand-held power tool 10 with protective hood 43, protective hood 43 being completed and joined by welding at welding holes 53 and forming a unit with collar 44.
- FIG. 2 shows an axial arrow 58, according to which the protective hood 43 must be pushed over the neck 24 and then rotated according to a rotating arrow 60 such that the rounding of the base body 50 is rotated relative to the position shown.
- a rotating arrow 60 such that the rounding of the base body 50 is rotated relative to the position shown.
- an end region of the latching lever 30 designed as a pushbutton 38 must be pivoted away from the protective hood 43 toward the transmission housing 14, so that the two latching cams 32 emerge from the two opposite latching openings 48 and do not hinder a rotation of the protective hood 43 , Only in the desired rotational position is the locking lever 30 released so that it can be biased by the compression spring 36 with its locking cams 32 to engage in the locking openings 48 and protect the protective hood 43 against unintentional adjustment.
- FIG. 3 shows a further exemplary embodiment of a protective hood 430, which differs from the protective hood 43 from FIGS. 1 and 2 in that the collar 440 is made of plastic or metal, which engages with corresponding snap-in projections 65 of the base body 500 with snap hooks 64 that extend radially outward can by going through the central hole 51 is inserted and fixed by snapping, so that its angled, hat-like region 66 comes to rest on the base body 500.
- the latching openings 48 are arranged in the base body 500, which must accordingly have a larger dimension in order to be able to absorb the latching forces or retaining forces for fixing the protective hood 24 on the transmission housing 14 by means of the latching lever 30.
- FIG. 4 shows the protective hood 430 in the assembled state, it being recognizable that the snap hooks 64 stand radially outward and overlap the base body 500 and secure it in position with respect to the collar 440.
- FIG. 5 shows a further example of a dismantled protective hood 432, the collar 441 of which is welded to the base body 501 and thus essentially corresponds to the protective hood 43 according to FIG. 2.
- FIG. 6 shows the protective hood 432, it going beyond the previous figures that the welding holes 53 are welded to the collar 44.
- FIG. 7 shows a protective hood 434, the collar ring 48 of which is made of plastic, which is molded onto the base body 504 in the region of the central hole 51.
- FIG. 8 shows a one-piece protective hood 433 made of steel, in which, as in FIG. 7, the latching openings 48 are arranged in the base body 502 (504), the advantage of this protective hood being that it can be produced in a single operation, even if in this case, the material expenditure is more complex than with the other variants.
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10343060A DE10343060A1 (de) | 2003-09-16 | 2003-09-16 | Handwerkzeugmaschine mit Schutzhaube |
PCT/DE2004/001615 WO2005035190A1 (de) | 2003-09-16 | 2004-07-22 | Handwerkzeugmaschine mit schutzhaube |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1663575A1 true EP1663575A1 (de) | 2006-06-07 |
EP1663575B1 EP1663575B1 (de) | 2008-01-02 |
Family
ID=34258729
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04762465A Expired - Lifetime EP1663575B1 (de) | 2003-09-16 | 2004-07-22 | Handwerkzeugmaschine mit schutzhaube |
Country Status (5)
Country | Link |
---|---|
US (1) | US7063606B2 (de) |
EP (1) | EP1663575B1 (de) |
CN (1) | CN100515677C (de) |
DE (2) | DE10343060A1 (de) |
WO (1) | WO2005035190A1 (de) |
Families Citing this family (63)
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AUPQ618800A0 (en) * | 2000-03-10 | 2000-04-06 | Bayly Design Associates Pty Ltd | Power tool |
DE10259520A1 (de) * | 2002-12-19 | 2004-07-01 | Robert Bosch Gmbh | Elektrohandwerkzeugmaschine |
SE525836C2 (sv) * | 2003-03-31 | 2005-05-10 | Atlas Copco Tools Ab | Slipmaskin med sprängskydd och spindellåsning |
DE102005000085A1 (de) * | 2005-07-05 | 2007-01-11 | Hilti Ag | Handwerkzeuggerät mit Schutzhaube |
DE102005061867A1 (de) * | 2005-12-23 | 2007-07-05 | Robert Bosch Gmbh | Schutzhaube mit Spannvorrichtung |
DE102005063017B4 (de) * | 2005-12-30 | 2019-05-16 | Robert Bosch Gmbh | Handgeführtes Elektrowerkzeug mit einer Schutzhaube |
DE102006022386A1 (de) * | 2006-05-12 | 2007-11-15 | Robert Bosch Gmbh | Schutzhaube für ein Handwerkzeug sowie Handwerkzeug mit Schutzhaube |
DE102006027576A1 (de) * | 2006-06-14 | 2007-12-20 | Robert Bosch Gmbh | Schutzhauben-Befestigungsvorrichtung |
DE502006006187D1 (de) | 2006-10-07 | 2010-04-01 | Metabowerke Gmbh | Elektrohandwerkzeuggerät, insbesondere ein Winkelschleifer mit einer Schutzhaube |
DE102006053305A1 (de) * | 2006-11-13 | 2008-05-15 | Robert Bosch Gmbh | Handwerkzeugmaschine mit Schutzhaube, insbesondere Winkelschleifer |
DE102006053303A1 (de) * | 2006-11-13 | 2008-05-15 | Robert Bosch Gmbh | Handwerkzeugmaschine für ein rotierendes Werkzeug mit Schutzhaube |
DE102007041840A1 (de) * | 2006-11-13 | 2008-05-15 | Robert Bosch Gmbh | Handwerkzeugmaschine mit Schutzhaube, insbesondere Winkelschleifer |
DE102006053301A1 (de) * | 2006-11-13 | 2008-05-15 | Robert Bosch Gmbh | Handwerkzeugmaschine für ein rotierendes Werkzeug mit Schutzhaube |
US7625265B2 (en) * | 2007-01-12 | 2009-12-01 | I.T., Inc. | Hood plates for handheld grinding tools |
CN101264578B (zh) * | 2007-03-14 | 2010-11-24 | 苏州宝时得电动工具有限公司 | 动力工具 |
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DE102009017299A1 (de) * | 2009-04-11 | 2010-10-21 | Metabowerke Gmbh | Schutzhaube für Elektrohandwerkzeuggeräte und Elektrohandwerkzeuggerät |
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KR101220750B1 (ko) | 2010-07-06 | 2013-01-09 | 계양전기 주식회사 | 위치 조절이 용이한 더스트 후드 조립체 및 이러한 더스트 후드 조립체를 구비한 전동공구 |
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JP5760658B2 (ja) * | 2011-04-29 | 2015-08-12 | 日立工機株式会社 | 携帯型作業機 |
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JP5959421B2 (ja) * | 2011-12-14 | 2016-08-02 | 株式会社マキタ | グラインダ |
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CN104640673B (zh) * | 2012-09-18 | 2018-02-13 | 英古所连公司 | 具有防护件的研磨工具 |
DE102012222602A1 (de) * | 2012-12-10 | 2014-06-26 | Robert Bosch Gmbh | Elektrische Maschine |
DE102013210962B4 (de) * | 2013-06-12 | 2016-08-04 | Robert Bosch Gmbh | Handwerkzeugmaschine mit einem elektromotorischen Antrieb und mindestens einem ersten Gehäuseteil |
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US10201889B2 (en) * | 2014-08-06 | 2019-02-12 | Sparky Guard, LLC | Fully rotatable grinder guard assembly and method for making same |
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EP3251791B1 (de) | 2016-05-06 | 2019-03-27 | Black & Decker Inc. | Umkehrbarer hebel für eine schutzeinheit für ein elektrowerkzeug |
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JP7089326B2 (ja) * | 2018-02-21 | 2022-06-22 | 株式会社マキタ | 電動工具 |
JP2020006483A (ja) * | 2018-07-09 | 2020-01-16 | 株式会社マキタ | 電動工具 |
JP7110025B2 (ja) * | 2018-08-07 | 2022-08-01 | 株式会社マキタ | 電動工具 |
TWI723507B (zh) * | 2019-08-22 | 2021-04-01 | 車王電子股份有限公司 | 電動工具之防護裝置 |
DE202019105846U1 (de) * | 2019-10-21 | 2021-01-22 | C. & E. Fein Gmbh | Elektrohandwerkzeugmaschine |
CN112775793B (zh) * | 2021-01-28 | 2022-01-04 | 河南省润领信息科技有限公司 | 一种环保机械加工用打磨装置 |
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CN116133811A (zh) * | 2021-08-06 | 2023-05-16 | 百得有限公司 | 具有护罩的圆锯 |
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-
2003
- 2003-09-16 DE DE10343060A patent/DE10343060A1/de not_active Withdrawn
-
2004
- 2004-07-22 US US10/522,975 patent/US7063606B2/en not_active Expired - Lifetime
- 2004-07-22 CN CNB2004800267784A patent/CN100515677C/zh not_active Expired - Lifetime
- 2004-07-22 WO PCT/DE2004/001615 patent/WO2005035190A1/de active IP Right Grant
- 2004-07-22 DE DE502004005855T patent/DE502004005855D1/de not_active Expired - Lifetime
- 2004-07-22 EP EP04762465A patent/EP1663575B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2005035190A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20050215186A1 (en) | 2005-09-29 |
EP1663575B1 (de) | 2008-01-02 |
US7063606B2 (en) | 2006-06-20 |
DE502004005855D1 (de) | 2008-02-14 |
DE10343060A1 (de) | 2005-04-07 |
WO2005035190A1 (de) | 2005-04-21 |
CN1852785A (zh) | 2006-10-25 |
CN100515677C (zh) | 2009-07-22 |
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