EP0836544A1 - Elektrische handschleifmaschine - Google Patents
Elektrische handschleifmaschineInfo
- Publication number
- EP0836544A1 EP0836544A1 EP97915347A EP97915347A EP0836544A1 EP 0836544 A1 EP0836544 A1 EP 0836544A1 EP 97915347 A EP97915347 A EP 97915347A EP 97915347 A EP97915347 A EP 97915347A EP 0836544 A1 EP0836544 A1 EP 0836544A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- tool holder
- grinding
- holder
- spring wire
- 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
- B24B45/00—Means for securing grinding wheels on rotary arbors
- B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power 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
- B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
Definitions
- the invention is based on an electric hand grinder of the type defined in the preamble of claim 1.
- the holder-side locking elements of the quick locking device have a one-piece bolt with the operating button, which can be moved against the force of a compression spring and a recess with two, one Locking nose-forming slopes.
- the locking elements on the tool side are formed by at least one latching hook, which is formed in one piece from the grinding plate and projects upwards therefrom.
- a latching hook is arranged in each of the three corners of the grinding plate.
- the form-locking elements set on the tool side are formed by support claws which are arranged in pairs in each corner of the grinding plate symmetrically to the latching hook, while the corresponding form-locking elements fixed on the holder side are realized by two engagement openings which are arranged on the side of the tool holder opposite the control button.
- the control button is moved against the force of the compression spring, whereby the locking lug releases the locking hook. The grinding plate can now be removed manually from the tool holder.
- the electric hand grinder according to the invention with the characterizing features of claim 1 has the advantage that the quick lock according to the invention in O 97/42002 PC17DE97 / 00496
- Lamellar grinding attachments, grinding tongues or grinding tubes can, due to the design of the quick-clamping device according to the invention, be used both for grinding from “below” and from “above”, which in the latter case means that a grinding force is also applied over the top of the special tool and from the tool holder can be included.
- the spring wire on the tool holder is pivotally held in a plane parallel to the support surface on the tool holder and is connected to an operating button. It carries a number of radially inward-facing indentations which essentially corresponds to the number of tool-side hooks and which engage behind the hooks in a pivot position of the spring wire which forms the locking position for the grinding tool.
- This constructive design ensures considerable ease of use when changing tools and, at the same time, a high level of locking reliability for the grinding tool used in the tool holder.
- the spring wire is guided in transverse slots by webs which are arranged on a circular line coaxial with the rotary bearing so that in Locking position of the spring wire is a pair of webs on both sides of one of the indentations and the web pairs are offset from one another by preferably the same circumferential angle.
- the annularly curved spring wire runs out into two legs which are approximately radially striving away and parallel to one another, one leg of which is bent at right angles in front of the other leg at the free end.
- the control button is clipped onto the legs. Thanks to this design, the spring wire and the control button can be installed very easily and quickly in the one-piece plastic tool holder.
- the tool and tool holder side are fixed
- Positive locking elements realized by two axially interlocking polygonal profiles, which are arranged coaxially to the axis of the rotary bearing on mutually facing sides of the grinding tool and tool holder.
- the tool-side polygon profile is preferred on the
- a sleeve which stands away from the upper side of the grinding tool, preferably with this in one piece, and the holder-side polygonal profile on the outside of a pin which projects from the tool and is preferably integral therewith and can be inserted into the sleeve in a form-fitting manner.
- the hooks of the quick-locking device which form the locking elements on the tool side are advantageously molded onto the outer wall of the sleeve. This means that all elements on the tool side and all elements on the holder side can be molded at the same time when the grinding tool or tool holder is being manufactured.
- the rotary bearing designed as a ball bearing is accommodated in the pin bearing the polygon profile on the holder side and is injected into the tool holder during the manufacture of the plastic tool holder together with a cap-like annular disk partially covering one end face of the ball bearing.
- the cap-like ring disk which still partially overlaps the outer ring of the ball bearing, prevents plastic from flowing into the ball bearing above it during the injection process. Injecting the ball bearing into the pin integral with the tool holder not only achieves a manufacturing advantage, but also protects the ball bearing against dust during operation.
- the design of the polygonal profiles and the arrangement of the hooks on the tool side are such that the grinding tool can be placed on the tool holder in several, preferably three, rotational positions offset by the same circumferential angle from one another about the pivot bearing axis.
- This makes it possible to e.g. To position the grinding tool, designed as a triangular, symmetrical grinding plate, quickly and precisely rotated by 120 ° relative to its original position, so that when the grinding effect of the first corner area of the grinding plate and the grinding sheet, e.g. in the event of wear or soiling, the second and third corner areas of which can be used instead of the first or second for further corner grinding, the corner always pointing exactly forward.
- the tool holder bears on one Pitch circle on the radial outer area of its surface facing the tool holder, pin-like feet, which engage in a form-fitting manner in suitable recesses in the grinding plate and serve to prevent rotation of the grinding plate relative to the tool holder and thereby enable very direct power transmission between the tool holder and the grinding plate.
- the tool holder is also an important component or spare part on which differently designed or equipped grinding tools can be exchanged or relocated or relocated without an auxiliary tool.
- Fig. 1 shows a partial side view of an electrical
- FIG. 2 shows a perspective top view of a tool holder of the hand grinding machine in FIG. 1.
- FIG. 4 is a bottom view of the tool holder in FIG. 2.
- 5 is a perspective bottom view of an operating button of a quick lock on the hand grinder in FIG.
- Fig. 6 is a bottom view of an annular spring wire
- Fig. 7 is a plan view of a grinding tool of the
- Fig. 8 is a spatial bottom view of another
- the electric hand-held grinder shown in detail in a side view and partially in section in FIG. 1 is designed as an orbital sander 9 with a grinding tool 10 designed as a triangular, symmetrical grinding plate.
- the underside of the sanding plate made of plastic is provided with a Velcro covering 11 for receiving sanding sheets, not shown.
- the orbital sander has a two-shell machine housing which is composed of two housing shells 121, 122 which abut one another along a parting line 123 running parallel to the longitudinal axis of the housing.
- An electric motor 13 is accommodated in the machine housing 12, of which only the fan 15 seated on the output shaft 14 can be seen.
- An on / off switch 16 arranged on the upper side of the machine housing 12 serves to switch the electric motor 13 on and off.
- the output shaft 14 drives a working shaft 18 via an angular gear 17, which is rotatably mounted in two ball bearings 19a and 19b which are fixed to the housing and which on the lower end face of the machine housing 12 with an eccentric pin 20 from the Machine housing 12 protrudes.
- the tool holder 22 made of plastic, which is shown enlarged in FIGS.
- the grinding tool 10 is held on the tool holder 22 by means of corresponding positive locking elements, which - as will be explained in more detail below - are fixed on the tool holder side or on the tool side and by means of a quick lock 24 which can be operated manually via an operating button 25.
- the grinding tool 10 lies on a support surface 37, which is clearly emphasized by a pre-drawn line, of the bowl-shaped tool holder 22 and includes with the tool holder 22 a dust extraction chamber 26, which on the one hand has suction holes 27 (FIG.
- the tool holder 22 is shown in FIG. 2 in a perspective top view, in FIG. 4 in a bottom view and in FIG. 3 in a longitudinal section according to line III-III in FIG. 2. He carries on his from the grinding tool 10 facing away from the top a central ring socket 30 which can be inserted into the oscillating body 23 held in the machine housing 12 and is held in the oscillating body 23 in a rotationally fixed manner via cams 31 formed on the ring socket 30. Coaxial with the ring socket 30, an internally hollow pin 32 continues in the bottom of the tool holder 22 facing the grinding tool 10, in which the ball bearing 21 is accommodated coaxially.
- the axially aligned axes of the ring socket 30, the pin 32 and the ball bearing 21 are shown in dash-dotted lines in FIGS. 1 and 3 and are designated by 33, while the axis of the working shaft 18 which is offset by the eccentric dimension is identified by 34.
- the ring socket 30 with the cams 31 and the pin 32 with the tool holder 22 are in one piece and are also formed during the injection molding process.
- the ball bearing 21 is injected together with a cap-like annular disc 35, which partially covers one end face of the ball bearing 21 and which partially overlaps the outer ring of the ball bearing 21, during injection molding into the pin 32, the annular disc 35 preventing plastic from flowing into the ball bearing 21 prevented.
- a symmetrical polygonal profile 36 is formed on the underside of the tool carrier 22 on the outside of the pin 32, which consists of three identical circular arc sections 361, each offset by 120 ° from one another, which in turn is made up of three by 120 °
- the same circular arc sections 362 offset from one another are connected in the form of axial strips whose arc radius is greater than that of the circular arc sections 361.
- a sleeve 38 which is integral with the grinding tool 10, projects from the upper side of the grinding tool 10 , on the inside of which a negative or hollow polygon profile 39 corresponding to the polygon profile 36 is formed with circular arc sections 391 and 392, the sections 392 being designed as axial grooves for receiving the axial strips determined by the circular arc sections 362, so that when the Grinding tool 10 on the support surface 37 on the tool holder 22, the two polygon profiles 36, 39 interlock positively and fix the grinding tool 10 against rotation on the tool holder 22.
- the two polygon profiles 36, 39 thus represent the interlocking elements between the tool holder 22 and the grinding tool 10, which correspond to one another and which are fixed at the beginning and are fixed on the tool side.
- the angularly symmetrical design of the polygon profiles 36, 39 makes it possible to place the grinding tool 10 on the tool holder 22 in three positions, each rotated by 120 ° relative to one another, about the axis 33.
- the chord 11 lock 24 fixes the grinding tool 10 to the tool holder 22 and prevents the grinding tool 10 from being pulled off the pin 32 unintentionally.
- the quick lock 24 has locking elements 40 fixed on the tool side and locking elements 41 cooperating therewith and fixed on the holder. As can be seen from FIGS.
- the locking elements 40 on the tool side are designed as hooks 42 integrally formed on the grinding tool 10, which are offset from one another by the same angle of rotation on a circular line and from which the upper side of the grinding tool facing the bearing surface 37 on the tool holder 22 10 stand out.
- the hooks 42 are formed on the outside of the sleeve 38, the inner surface of which carries the polygon profile 39.
- the cooperating holder-side locking elements 41 are formed by an annularly bent spring wire 43, which is shown in FIGS. 4 and 6.
- the spring wire 43 has a number corresponding to the number of hooks 42 on the sleeve 38, here three indentations 431 pointing radially inwards, which in turn are offset according to the hooks 42 by the same angle of rotation with respect to one another.
- annularly bent spring wire 43 can be rotated in outer slots 51 by webs 44 or with its legs 432, 433 in
- the webs 44 are arranged in pairs so that in the locked position of the spring wire 43, as shown in FIG. 4, there is a pair of webs on both sides of an indentation 431.
- the pairs of webs are in turn offset from one another by the same circumferential angle.
- the spring wire 43 bent in the shape of a ring runs out into two legs 432 and 433, which extend approximately radially away and are mutually parallel.
- One leg 432 is bent at right angles at the end and lies in front of the straight end of the leg 433.
- the legs 432, 433 pass through the opening 52 in the front tip of the tool carrier 22.
- the operating button 25 of the quick locking device 24 can be clipped onto the free ends of the legs 432, 433 and is thereby carried by the spring wire 43.
- the operating button 25 has corresponding grooves and locking lugs on its underside, as shown in FIG. 5.
- Indentations 431 slide away from hooks 42 so that the parts of spring wire 43 located radially further out take the place of indentations 431 and thus release hooks 42.
- the grinding tool 10 can then be manually removed from the tool holder 22 in the direction of the axis 33.
- the grinding tool 10 can be changed and - with the abovementioned design of the grinding tool 10 as a triangular, symmetrical grinding plate - rotated through 120 ° in each case and inserted back into the tool holder 22 with a corner to the front. This enables a uniform wear of the corner areas of the sanding sheets without them must be released from the Velcro coating of the tool holder 22.
- the operating button 25 is pivoted back (clockwise in FIG. 4) until the spring wire 43 reaches the locking position shown in FIG. 4 occupies.
- the indentations 431 of the spring wire 43 then engage behind the hooks 42 of the grinding tool 10 again, and the latter is firmly locked on the tool holder 22.
- the grinding tool 10 can be clipped onto the tool holder 22.
- the control button 25 can then be omitted, as can the rotatable reception of the spring wire 43 in the transverse slots 51 of the webs 44.
- FIG. 8 The spatial bottom view shown in FIG. 8 of a further exemplary embodiment of the tool holder according to the invention
- the tool holder 222 has a suction channel 229, a symmetrical polygonal profile 236 with the same circular arc sections 461, 462, webs 244 offset from one another by 120 ° in each case, without inserted spring wire and without
- the feet 254 engage with the area protruding beyond the contact surface 237 into guide holes 660 of a grinding plate 100 shown in FIG. 9, which match substantially without play and which, except for the guide holes 660, corresponds to that according to FIG.
- Tool holder 222 secured. This improves the precision when guiding the grinding plate over the workpiece surface to be machined.
- FIG. 9 shows a top view of the upper side of a further exemplary embodiment of the grinding tool 100, which, apart from guide holes 660, corresponds to the grinding tool 10 according to FIG. 7 and is provided for coupling with the tool holder 222 according to FIG. 8.
- the grinding tool 100 is supported on the bearing surface 237 on the tool holder 222 according to FIG. 8.
- a sleeve 380 which is integral with the grinding tool 100, projects from the top of the grinding tool 100, on the inside of which a polygon profile 390, corresponding to the polygon profile 236 of the tool holder 222, with circular arc sections 491 and 492 is formed.
- the two polygon profiles 236, 390 interlock positively and fix the grinding tool 100 on the tool holder 222 in a non-rotatable manner.
- the two polygon profiles 236, 390 form the above-mentioned interlocking elements between the tool holder 222 and the grinding tool 100 which are fixed on the holder and tool side and correspond to one another.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19617572A DE19617572A1 (de) | 1996-05-02 | 1996-05-02 | Elektrische Handschleifmaschine |
DE19617572 | 1996-05-02 | ||
PCT/DE1997/000496 WO1997042002A1 (de) | 1996-05-02 | 1997-03-13 | Elektrische handschleifmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0836544A1 true EP0836544A1 (de) | 1998-04-22 |
EP0836544B1 EP0836544B1 (de) | 2002-01-02 |
Family
ID=7793091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97915347A Expired - Lifetime EP0836544B1 (de) | 1996-05-02 | 1997-03-13 | Elektrische handschleifmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US6004194A (de) |
EP (1) | EP0836544B1 (de) |
JP (1) | JPH11508833A (de) |
CN (1) | CN1066994C (de) |
DE (2) | DE19617572A1 (de) |
WO (1) | WO1997042002A1 (de) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6386961B1 (en) | 1999-07-19 | 2002-05-14 | Thomas D. Cureton | Hand held grinder |
DE10003504C2 (de) * | 2000-01-27 | 2001-11-15 | Kompernas Handelsgmbh | Handschleifgerät |
DE10017981A1 (de) * | 2000-04-11 | 2001-10-25 | Bosch Gmbh Robert | Werkzeugaufnahme |
DE10328967A1 (de) * | 2003-06-26 | 2005-01-13 | Robert Bosch Gmbh | Motorgetriebenes Handschleifwerkzeug |
JP4866569B2 (ja) * | 2005-05-27 | 2012-02-01 | 日東工器株式会社 | 研磨工具 |
CA2529354A1 (en) * | 2005-12-08 | 2007-06-08 | Luigi Panfili | Sanding device, system including the same, and method of operating associated thereto |
US20080072386A1 (en) * | 2006-09-27 | 2008-03-27 | The Malish Corporation | Locking coupler for floor maintenance pad |
EP2086720B1 (de) * | 2006-10-24 | 2010-01-20 | Robert Bosch GmbH | Elektrohandwerkzeugmaschine zum durchführen von schleifarbeiten, insbesondere schwingschleifer |
US7736216B2 (en) * | 2008-08-20 | 2010-06-15 | Black & Decker Inc. | Sander having removable platen |
US8172642B2 (en) | 2008-08-20 | 2012-05-08 | Black & Decker Inc. | Multi-sander |
USD623034S1 (en) | 2009-12-18 | 2010-09-07 | Techtronic Power Tools Technology Limited | Tool arbor |
USD619152S1 (en) | 2009-12-18 | 2010-07-06 | Techtronic Power Tools Technology Limited | Adapter |
DE102010028302A1 (de) * | 2010-04-28 | 2011-12-01 | Hilti Aktiengesellschaft | Bohrwerkzeug |
USD651062S1 (en) | 2010-09-29 | 2011-12-27 | Milwaukee Electric Tool Corporation | Tool interface for an accessory |
USD653523S1 (en) | 2010-09-29 | 2012-02-07 | Milwaukee Electric Tool Corporation | Adapter for a tool |
USD646542S1 (en) | 2010-09-29 | 2011-10-11 | Milwaukee Electric Tool Corporation | Accessory interface for a tool |
US9421682B2 (en) | 2011-07-18 | 2016-08-23 | Black & Decker Inc. | Multi-head power tool with reverse lock-out capability |
USD753355S1 (en) | 2012-11-07 | 2016-04-05 | Grillbot, Llc | Grill cleaning device |
USD734116S1 (en) * | 2012-06-27 | 2015-07-14 | Kwai Sun Oliver Wong | Replacement head for a hand-held sanding implement |
US9555554B2 (en) | 2013-05-06 | 2017-01-31 | Milwaukee Electric Tool Corporation | Oscillating multi-tool system |
US9956677B2 (en) | 2013-05-08 | 2018-05-01 | Black & Decker Inc. | Power tool with interchangeable power heads |
CA2822631A1 (en) | 2013-08-01 | 2015-02-01 | A. Richard Tools Co./Outils A. Richard Co. | Sanding device, and sanding assembly including the same |
US9387578B2 (en) * | 2013-10-28 | 2016-07-12 | Black & Decker Inc. | Handle arrangement for sander |
US9475172B2 (en) | 2014-07-15 | 2016-10-25 | Milwaukee Electric Tool Corporation | Adjustable guard for power tool |
DE102017213669A1 (de) * | 2016-08-22 | 2018-02-22 | Robert Bosch Gmbh | Werkzeugeinrichtung für eine Handwerkzeugmaschine |
JP6449840B2 (ja) * | 2016-12-27 | 2019-01-09 | 株式会社Mhiエアロスペースプロダクション | 航空機外板の補修方法、電動工具及びアタッチメント |
DE102017214118A1 (de) * | 2017-08-11 | 2019-02-14 | Robert Bosch Gmbh | Schnellspannvorrichtung für eine, insbesondere zumindest eine rotierend antreibbare Abtriebswelle aufweisende, tragbare Werkzeugmaschine, insbesondere Winkelschleifmaschine |
US11396085B2 (en) * | 2017-09-15 | 2022-07-26 | Diamond Productions Ltd. | Adapter for coupling abrasive elements to a floor finishing machine |
USD925623S1 (en) * | 2019-02-28 | 2021-07-20 | Guido Valentini | Protective cap |
USD951739S1 (en) * | 2019-04-18 | 2022-05-17 | Mirka Ltd | Backing pad for sander |
USD952431S1 (en) * | 2020-10-23 | 2022-05-24 | Jing Men Jun Kai E-commerce Co., Ltd. | Polishing pad |
USD952432S1 (en) * | 2020-10-23 | 2022-05-24 | Jing Men Jun Kai E-commerce Co., Ltd. | Polishing pad |
USD968186S1 (en) * | 2020-11-09 | 2022-11-01 | Lake Country Tool, Llc | Polishing pad |
CN112872896A (zh) * | 2021-02-23 | 2021-06-01 | 江西经济管理干部学院 | 一种航空机械产品用多功能加工台 |
USD980032S1 (en) * | 2022-08-23 | 2023-03-07 | Jiangzhao Liu | Polishing pad |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5309682A (en) * | 1990-03-28 | 1994-05-10 | Robert Bosch Gmbh | Hand held power tool with working disc |
DE4113641A1 (de) * | 1991-04-26 | 1992-10-29 | Bosch Gmbh Robert | Handwerkzeugmaschine |
DE4223107A1 (de) * | 1992-07-14 | 1994-01-20 | Bosch Gmbh Robert | Flächenschleifmaschine |
DE59400402D1 (de) * | 1993-02-04 | 1996-08-14 | Bosch Gmbh Robert | Handwerkzeugmaschine zur Flächenbearbeitung |
DE4303044A1 (de) * | 1993-02-04 | 1994-08-11 | Bosch Gmbh Robert | Handwerkzeugmaschine zur Flächenbearbeitung |
US5470272A (en) * | 1994-02-03 | 1995-11-28 | Ryobi Motor Products Corp. | Removable working tool assembly |
-
1996
- 1996-05-02 DE DE19617572A patent/DE19617572A1/de not_active Withdrawn
-
1997
- 1997-03-13 EP EP97915347A patent/EP0836544B1/de not_active Expired - Lifetime
- 1997-03-13 US US08/930,155 patent/US6004194A/en not_active Expired - Lifetime
- 1997-03-13 DE DE59706088T patent/DE59706088D1/de not_active Expired - Lifetime
- 1997-03-13 JP JP9539400A patent/JPH11508833A/ja active Pending
- 1997-03-13 WO PCT/DE1997/000496 patent/WO1997042002A1/de active IP Right Grant
- 1997-03-13 CN CN97190469A patent/CN1066994C/zh not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9742002A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1997042002A1 (de) | 1997-11-13 |
DE59706088D1 (de) | 2002-02-28 |
DE19617572A1 (de) | 1997-11-13 |
JPH11508833A (ja) | 1999-08-03 |
EP0836544B1 (de) | 2002-01-02 |
CN1190362A (zh) | 1998-08-12 |
CN1066994C (zh) | 2001-06-13 |
US6004194A (en) | 1999-12-21 |
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