EP0583270A1 - Handwerkzeugmaschine. - Google Patents
Handwerkzeugmaschine.Info
- Publication number
- EP0583270A1 EP0583270A1 EP92908809A EP92908809A EP0583270A1 EP 0583270 A1 EP0583270 A1 EP 0583270A1 EP 92908809 A EP92908809 A EP 92908809A EP 92908809 A EP92908809 A EP 92908809A EP 0583270 A1 EP0583270 A1 EP 0583270A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking
- collar
- spring element
- machine according
- push
- 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
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
Definitions
- the invention is based on a hand tool, in particular an angle grinder, of the type defined in the preamble of claim 1.
- the protective hood which is attached to the clamping neck with an opening is held axially immovably between two locking rings, which are secured by a snap ring which is inserted into an annular groove incorporated in the clamping neck.
- a lever is non-rotatably fastened to the clamping neck, which engages positively with a nose in bores or grooves in the protective hood.
- the protective hood can be turned into a desired position around the axis of the clamping neck. After releasing the lever, the nose snaps into another Hole or groove, and the protective hood is fixed in this new rotary position.
- the handheld power tool according to the invention with the characterizing features of claim 1 has the advantage that the protective hood can be removed from the handheld power tool and used again without using an auxiliary tool.
- the handling required for this is simple and time-saving.
- the protective hood After releasing the locking device, the protective hood only needs to be turned into its plug-in position and can then be axially removed from the clamping neck.
- the protective hood is connected to the handheld power tool in the opposite direction.
- the connection of the protective hood with the hand tool is structurally much simpler and requires considerably fewer individual parts. Overall, the protective hood with connecting element to the hand tool is less expensive to manufacture, smaller in size and lighter, and overall leads to a lower weight of the hand tool.
- a spring element which is resilient in the axial direction is held against rotation on the clamping neck and is supported on the one hand on the bearing flange of the hand-held power tool and on the other hand on the end face of the push-on collar facing away from the protective hood.
- Locking device is formed on the spring element, specifically as a locking lug projecting axially from the spring element, and the corresponding one Locking element is formed by at least one recess arranged in the end face of the push-on collar facing the spring element, into which recess the locking nose projects in a form-fitting manner.
- the manual locking device can be implemented very simply and inexpensively by these design measures. If a plurality of equidistantly arranged recesses are provided, which are distributed over part of the circumference of the push-on collar, the protective hood can in each case be fixed non-rotatably in different pivot positions.
- a locking lug is formed on the spring element and in the end of the Au plug-in collar facing the spring element, cooperating locking lugs with the locking lug are arranged equidistantly, which are distributed over part of the circumference of the push-on collar.
- the locking lug and locking lug are preferably arranged diametrically opposite on the spring element, and the arrangement of the recesses and locking recesses is made such that when the locking lug engages in a locking recess, the locking lug is aligned with one of the recesses.
- the spring element also has a kind of ratchet function, which means that the protective hood can only be rotated by fixed angular steps. With each angular step it is ensured that the locking lug can fall into one of the recesses.
- LRSATZBkATT - h - Fig. 1 a partial side view of a
- FIG. 2 shows a plan view of the protective hood for the angle grinding machine in FIG. 1,
- FIG. 3 shows a plan view of a spring element of the angle grinding machine in FIG. 1 held on the bearing flange
- FIG. 4 shows a front view of the spring element in FIG. 3.
- the motor housing 11 and the gear housing 12 can be seen from the hand-held angle grinder with protective hood 10, which is shown in detail in FIG. 1, as an example of a general hand-held machine tool.
- a drive spindle 13 protrudes from the gear housing 12 and carries at its free end a receptacle 14 for a grinding or cutting disc, not shown here.
- the drive spindle 13 is mounted in a bearing flange ⁇ , which is fastened in the gear housing 12, preferably by means of threaded screws, and projects out of the gear housing 12 with a reduced diameter neck ⁇ l.
- a radial bearing 16 for the drive spindle 13 is accommodated in the clamping neck l ⁇ l, and the protective hood 10, which covers half of the grinding or cutting disc, is fastened to the outside on the clamping neck l ⁇ l.
- the protective hood 10 carries a sleeve-shaped push-on collar 17 which is pushed onto the clamping neck l ⁇ l and engages with radial projections 18 projecting from the inner wall into an annular groove 19 which is formed in the clamping neck l ⁇ l.
- the push-on collar 17 is formed by the central part of a bell-shaped sheet metal cap 20 which is in the cap base 201
- ER S carries a coaxial opening 21 for the passage of the drive spindle 13 with the receptacle 14 and is permanently connected to the protective hood 10, for example by welding.
- axial grooves 22 are provided on the clamping neck, which on the one hand open into the annular groove 19 and, on the other hand, end free on the end face of the clamping neck l ⁇ l.
- the width of the axial grooves 22 is chosen so that the radial projections 18 can slide on the push-on collar 17 in the axial grooves 22.
- the number of axial grooves 22 corresponds to the number of radial projections 18, wherein, as can be seen from FIG.
- this protective cover 10 is left in the non-use position of the protective hood 10 by rotating the protective hood 10 with a sheet metal cap 20, the radial projections 18 sliding in the annular groove 19.
- a manually operable locking device 23 is provided to fix the protective hood 10 in at least one desired position relative to the clamping neck 11. It has a spring element 24 which is non-rotatably attached to the bearing flange 15.
- the spring element 24 is shown in detail in FIGS. 3 and 4. It is stamped out of spring steel and has a ring 26 which, as can be clearly seen from FIG. 4, on diametrically opposite sides downwards from the Die plane is angled. With the ring 26 four fastening tabs 27 are connected in one piece, which lie in the plane of the spring element 24 and each carry a passage opening 28 for a fastening screw.
- the spring element 24 rests on the bearing flange l ⁇ , the ring 26 surrounding the clamping neck l ⁇ l with a radial distance.
- the threaded screws are used, with which the bearing flange I ⁇ is fastened to the gear housing 12, so that the fastening tabs 27 form a type of washer for these threaded screws.
- an actuating button 31 is formed on the ring half 261, which extends axially over the push-on collar 17 to the cap base 201 of the actuating cap 20 when the protective hood 10 is attached.
- the sheet metal cap 20 carries at its end a radially outwardly projecting collar 202, in which approximately half of its circumference equidistant recesses 32 are punched (see FIG. 2).
- the width of the recesses 32 corresponds to the width of the locking lug 29 so that it can engage in the recesses 32 in a form-fitting manner in the circumferential direction.
- Equidistant bead-like recesses 33 are embossed over the other half of the circumference of the collar 202.
- the distance between the locking troughs 33 corresponds to the distance of the recesses 32 from one another, the locking troughs 33 being such that a locking trough 33 is diametrically opposite to a recess 32 due to the diametrical arrangement of the locking lug 29 and locking lug 30.
- the locking lug 30 engages under spring pressure in the locking troughs 33, so that a type of ratchet is created, by means of which the protective hood 10 after lifting the locking lug 29 out of the associated one
- REPLACEMENT LEAF Recess 32 can be pivoted by an angle of rotation predetermined by the arrangement of the locking recesses 33.
- the protective hood 10 described with the push-on collar 17 attached thereto can be attached to the angle grinder or removed from it again without using an auxiliary tool.
- the protective hood 10 is to be attached to the clamping neck l ⁇ l in such a rotational position that the radial projections 18 in the push-on collar 17 are aligned with the axial grooves 22 in the clamping neck l ⁇ l.
- the push-on collar 17 is pulled axially onto the clamping neck l ⁇ l until the radial projections 18 come to lie in the annular groove 19 in the clamping neck, l ⁇ l.
- the collar 202 of the push-on collar 17 or the sheet metal cap 20 rests against the two ring halves 261, 262 of the spring element 24 and shifts them in the axial direction, as a result of which the spring element 24, which is supported between the bearing flange ⁇ and the sheet metal cap 20, is preloaded.
- the protective hood 10 can .
- the clamping neck I ⁇ l can be turned until it takes the desired position.
- the detent 30 which slides in and out of the detent depression 33 defines defined positions of the protective hood 10. If the actuation button 31 is released in such a position, the locking lug 29 is pushed into the respective recess 32 by spring force.
- the push-on collar 17 and thus the protective hood 10 is fixed non-rotatably on the clamping neck l ⁇ l.
- the actuation button 31 can be molded as a plastic part onto the spring element 24 made of spring band steel.
- the entire spring element 24 can, however, also be designed as a plastic part, which is either attached to the bearing flange l ⁇ , as described, or is integrally formed on the bearing flange, which is also made of plastic. In the latter case, the fastening tabs 27 are omitted.
- the invention is not limited to the connection of a protective hood to an angle grinder.
- a handle can also be connected to a drilling machine, all of the structural measures described on the protective hood being carried out on the handle.
- the invention can thus also be used wherever additional handles on hand-held power tools are to be rotated and / or adjusted in angle, but also where chucks by
- Hand machine tools are to be rotated in such a way.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4113641A DE4113641A1 (de) | 1991-04-26 | 1991-04-26 | Handwerkzeugmaschine |
DE4113641 | 1991-04-26 | ||
PCT/DE1992/000332 WO1992019423A1 (de) | 1991-04-26 | 1992-04-24 | Handwerkzeugmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0583270A1 true EP0583270A1 (de) | 1994-02-23 |
EP0583270B1 EP0583270B1 (de) | 1995-07-19 |
Family
ID=6430399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92908809A Expired - Lifetime EP0583270B1 (de) | 1991-04-26 | 1992-04-24 | Handwerkzeugmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US5386667A (de) |
EP (1) | EP0583270B1 (de) |
JP (1) | JP3447287B2 (de) |
BR (1) | BR9205941A (de) |
DE (2) | DE4113641A1 (de) |
WO (1) | WO1992019423A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009115142A1 (de) * | 2008-03-18 | 2009-09-24 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere handgeführte schleifmaschine |
WO2009115143A1 (de) * | 2008-03-18 | 2009-09-24 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere handgeführte schleifmaschine |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9201990L (sv) * | 1992-06-29 | 1993-12-30 | Atlas Copco Tools Ab | Pneumatisk rotationsslipmaskin |
DE4239367A1 (de) * | 1992-11-24 | 1994-05-26 | Bosch Gmbh Robert | Handgeführtes Elektrowerkzeug, insbesondere Winkelschleifmaschine |
DE4423889C1 (de) * | 1994-07-07 | 1995-06-22 | Atlas Copco Elektrowerkzeuge | Schutzhaube für eine Handwerkzeugmaschine |
US5637035A (en) * | 1995-06-28 | 1997-06-10 | Milwaukee Electric Tool Corporation | Adjustable guard arrangement for power tool |
DE29513331U1 (de) * | 1995-08-19 | 1996-12-12 | Bosch Gmbh Robert | Winkelschleiferschutzhaube |
DE19617572A1 (de) * | 1996-05-02 | 1997-11-13 | Bosch Gmbh Robert | Elektrische Handschleifmaschine |
SE510352C2 (sv) * | 1996-05-13 | 1999-05-17 | Electrolux Ab | Skyddskåpa vid motordriven handhållen verktygsmaskin |
US6464573B1 (en) | 2000-06-30 | 2002-10-15 | Porter-Cable Corporation | Guard attachment system with knurled clamp ring |
DE10257687B4 (de) * | 2002-12-10 | 2006-03-23 | Peter Klotz | Polierball |
DE10336873B4 (de) * | 2003-08-11 | 2007-09-20 | Hilti Ag | Schutzhaubenanordnung |
DE10348395A1 (de) * | 2003-10-17 | 2005-05-19 | Robert Bosch Gmbh | Schutzhaube für eine Elektrowerkzeugmaschine, Elektrowerkzeugmaschine sowie System mit Schutzhaube und Elektrowerkzeugmaschine |
DE102005063017B4 (de) | 2005-12-30 | 2019-05-16 | Robert Bosch Gmbh | Handgeführtes Elektrowerkzeug mit einer Schutzhaube |
DE102006027576A1 (de) | 2006-06-14 | 2007-12-20 | Robert Bosch Gmbh | Schutzhauben-Befestigungsvorrichtung |
DE102008010977A1 (de) | 2008-02-25 | 2009-08-27 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere handgeführte Schleifmaschine |
DE102008000732A1 (de) * | 2008-03-18 | 2009-09-24 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere handgeführte Schleifmaschine |
DE102008002548B4 (de) | 2008-06-20 | 2021-11-11 | Robert Bosch Gmbh | Werkzeugmaschine, insbesondere Handwerkzeugmaschine |
US8172642B2 (en) | 2008-08-20 | 2012-05-08 | Black & Decker Inc. | Multi-sander |
US7736216B2 (en) * | 2008-08-20 | 2010-06-15 | Black & Decker Inc. | Sander having removable platen |
DE102009048357A1 (de) * | 2009-10-06 | 2011-04-21 | Metabowerke Gmbh | Elektrohandwerkzeuggerät |
JP5684056B2 (ja) | 2010-08-16 | 2015-03-11 | 株式会社マキタ | 手持ち工具 |
US9421682B2 (en) | 2011-07-18 | 2016-08-23 | Black & Decker Inc. | Multi-head power tool with reverse lock-out capability |
JP5959421B2 (ja) * | 2011-12-14 | 2016-08-02 | 株式会社マキタ | グラインダ |
EP2897766B1 (de) * | 2012-09-18 | 2017-08-23 | Ingersoll-Rand Company | Schleifwerkzeuge mit schutzvorrichtungen |
US9956677B2 (en) | 2013-05-08 | 2018-05-01 | Black & Decker Inc. | Power tool with interchangeable power heads |
JP6020767B2 (ja) * | 2014-02-28 | 2016-11-02 | 日立工機株式会社 | 電動工具 |
US9475172B2 (en) * | 2014-07-15 | 2016-10-25 | Milwaukee Electric Tool Corporation | Adjustable guard for power tool |
USD744800S1 (en) | 2014-07-16 | 2015-12-08 | Milwaukee Electric Tool Corporation | Power tool blade guard |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE390367C (de) * | 1923-02-27 | 1924-02-21 | Gustav Voigtmann | Deichselbefestigung |
US1638459A (en) * | 1924-10-23 | 1927-08-09 | Hisey Wolf Machine Company | Grinding-wheel guard |
IT1040243B (it) * | 1975-07-30 | 1979-12-20 | Star Utensili Elett | Carter di protezione pe utensili angolari portatili |
DE3338917A1 (de) * | 1983-10-27 | 1985-05-09 | C. & E. Fein Gmbh & Co, 7000 Stuttgart | Schutzhaubenbefestigung fuer tragbare winkelschleifer |
DE3633943A1 (de) * | 1986-10-04 | 1988-04-07 | Licentia Gmbh | Mit dem spindelhals eines handgefuehrten winkelschleifers oder dergleichen elektrowerkzeug vereinigbare schutzhaube |
DE3636500C2 (de) * | 1986-10-27 | 1995-02-09 | Bosch Gmbh Robert | Schutzhaube für Handwerkzeugmaschinen, insbesondere Schleifmaschinen |
DE3636601A1 (de) * | 1986-10-28 | 1988-05-05 | Bosch Gmbh Robert | Schutzhaube fuer schleifmaschinen, insbesondere winkelschleifer, und dazu passende befestigungsaufnahme auf diese |
DE3638337A1 (de) * | 1986-11-10 | 1988-05-19 | Licentia Gmbh | Spannvorrichtung fuer die schutzhaube von winkelschleifern od. dergl. elektrowerkzeuge |
DE3744219A1 (de) * | 1987-12-24 | 1989-07-06 | Fein C & E | Handschleifmaschine mit verstellbarer schutzhaube |
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 |
DE3919649A1 (de) * | 1989-06-16 | 1990-12-20 | Bosch Gmbh Robert | Winkelschleiferschutzhaube |
DE3921772A1 (de) * | 1989-07-01 | 1991-01-03 | Hilti Ag | Handgeraet mit trenn- oder schleifscheibe |
DE3940584A1 (de) * | 1989-12-08 | 1991-06-13 | Bosch Gmbh Robert | Schutzhaube fuer handwerkzeugmaschinen, insbesondere schleifmaschinen |
-
1991
- 1991-04-26 DE DE4113641A patent/DE4113641A1/de not_active Withdrawn
-
1992
- 1992-04-24 DE DE59202970T patent/DE59202970D1/de not_active Expired - Fee Related
- 1992-04-24 BR BR9205941A patent/BR9205941A/pt not_active IP Right Cessation
- 1992-04-24 JP JP50796292A patent/JP3447287B2/ja not_active Expired - Fee Related
- 1992-04-24 EP EP92908809A patent/EP0583270B1/de not_active Expired - Lifetime
- 1992-04-24 US US08/137,179 patent/US5386667A/en not_active Expired - Lifetime
- 1992-04-24 WO PCT/DE1992/000332 patent/WO1992019423A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9219423A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009115142A1 (de) * | 2008-03-18 | 2009-09-24 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere handgeführte schleifmaschine |
WO2009115143A1 (de) * | 2008-03-18 | 2009-09-24 | Robert Bosch Gmbh | Handwerkzeugmaschine, insbesondere handgeführte schleifmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE59202970D1 (de) | 1995-08-24 |
JPH06506638A (ja) | 1994-07-28 |
WO1992019423A1 (de) | 1992-11-12 |
EP0583270B1 (de) | 1995-07-19 |
JP3447287B2 (ja) | 2003-09-16 |
DE4113641A1 (de) | 1992-10-29 |
BR9205941A (pt) | 1994-06-21 |
US5386667A (en) | 1995-02-07 |
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