EP0732174B1 - Spanneinrichtung zum Festlegen eines Werkzeugs - Google Patents
Spanneinrichtung zum Festlegen eines Werkzeugs Download PDFInfo
- Publication number
- EP0732174B1 EP0732174B1 EP95120336A EP95120336A EP0732174B1 EP 0732174 B1 EP0732174 B1 EP 0732174B1 EP 95120336 A EP95120336 A EP 95120336A EP 95120336 A EP95120336 A EP 95120336A EP 0732174 B1 EP0732174 B1 EP 0732174B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping device
- nut member
- disc
- spring
- clamping
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 description 3
- 230000036316 preload Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
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
-
- 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
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/16—Bushings; Mountings
Definitions
- the invention relates to a clamping device for Setting a disc-shaped tool, in particular Grinding wheel, on a threaded spindle Hand machine tool, one on the threaded spindle screw-on nut part a clamping disc against that Tool presses and between your mother part and the An axial roller bearing is arranged.
- tensioning device for example a grinding wheel attached to an angle grinder will.
- the tensioning device is an independent part, so that angle grinders with usual threaded spindles can also be retrofitted with the clamping device.
- Such a tensioning device is in the DE-OS 21 56 770 described.
- Through the axial roller bearing should be the friction between the tool or on it adjacent washer and your nut part in be essentially canceled. This pulls the Mother not firm in the company. So the mother has to go Sufficient start of operation with a wrench be tightened, the torque of the Transfer threaded spindle to the grinding wheel. In practice, this requires a wrench. At this construction will use the entire torque a flange of the threaded spindle on the grinding wheel transfer. The tension disc itself does not transmit anything Torque on the grinding wheel.
- DE 37 05 638 C1 is a tensioning device described in which for torque transmission Spring washer wedged to the nut part by clamping parts becomes. To relax the tensioning device Clamping parts by actuating a rotary ring radially Approved. This tensions under extreme loads Mother part accordingly firm. A Slip clutch function has the tensioning device of the DE 37 05 638 C1 does not. The overall height of this Tensioning device is comparatively large, which is what Work disturbs. Since the rotating ring is close to the Grinding wheel is in use in practice little convenient.
- DE 42 43 328 C1 is a quick release device described with a disc spring.
- the disc spring should prevent the quick release device when Decelerate the grinding wheel by itself from the Threaded spindle releases. When working with the grinding wheel the disc spring is ineffective; it does not lead to one Overload slip clutch effect.
- the object of the invention is a tensioning device propose the type mentioned above, which is a simple and safe manual clamping and loosening connected with a slip clutch function in the event of overload.
- the above task is for a Clamping device of the type mentioned in the introduction solved that between the spring washer and the nut part the axial roller bearing on his Outer circumference Spring is arranged wherein the spring for transmitting the torque from the Threaded spindle on the tool a frictional connection forms between the nut part and the spring washer and the thrust roller bearing axially the washer on the nut part supports, and that when exceeding an upper Limit value of the torque (overload) the mother part slips against the tension disc, the Axial roller bearing rotates.
- the mother part is used to release the clamping device operated. It is a tension and loosening of the Clamping device possible by hand without auxiliary tools.
- Embodiment of the invention on the mother part pivotable flap be stored. With this it is Screwing of the nut part is easy.
- tensioning device Another advantage of the tensioning device is that that all angle grinders have the usual standard threaded spindle are easy to retrofit. It is also favorable that the tensioning device is flat can be made.
- the tensioning device has a nut part that a nut (1) and a positive on this non-rotatably arranged bell (2).
- the mother (1) is with an internal thread (3) on a not shown Threaded spindle of a hand machine tool, for example Angle grinder, screwable.
- the lead screw is provided with a flange against which one is not closer shown grinding wheel is pressed.
- a tensioning disc (4) can be rotated and with low stroke axially displaceable.
- An outer edge (6) of the bell (2) is in front of the Outer circumference of the tension disc (4).
- An annular surface (7) is on the tensioning disc (4) trained, which serves to abut the grinding wheel.
- the grinding wheel is thus between the above Flange of the threaded spindle and the ring surface (7).
- a hardened washer (8) lies in the bell (2). Between the bell (2) or the washer (8) and the tension disk (4) is an axial needle bearing (9) arranged, the washer (8) as a tread serves. Between the washer (8) and the Spring washer (4) is an annular disc spring (10) provided that with its inner edge (11) on the Intermediate disc (8) and with its outer edge (12) on the Bracing washer (4) supported. Encloses the disc spring (10) the needle bearing (9) on its outer circumference. So there are two mechanically parallel transmission means between the Mother part (1) and the clamping washer (4), namely on the one hand the axial needle bearing (9) and on the other hand the plate spring (10). Instead of the plate spring (10) could also other such springs, for example corrugated springs, be provided. A spring (10) could also be a rubber elastic ring can be used. The disc spring (10) or the ring seals the space in which the Axial needle bearing (9) is located on the outside.
- a flap (13) is pivotably mounted on the mother part (1, 2) by means of locking lugs (14).
- the flap (13) extends approximately 180 o and is provided with depressions (15).
- the stopper tabs (14) are loaded by a further spring plate (16) and designed so that the flap (13) is locked in a flat on the bell (2) resting position and in a by about 80 o raised position.
- the further plate spring (16) is dimensioned such that the flap (13) automatically moves from the folded-up position into the position in which it is on the bell (2 ) rests.
- Auxiliary holes (17) can be provided on the bell (2), with which the mother part (1,2) in particular Malfunctions by inserting a standard two-hole nut driver is solvable.
- the disc spring (10) caused rotationally fixed frictional connection between the nut part (1,2) and the spring washer (4) and thus also a rotationally fixed friction connection between the Spring washer (4) and the grinding wheel.
- the upper Limit of the transferable torque is by the Clamping force of the disc spring (10) and another Axial needle bearing (9) preventing the disk spring (10) from tightening limited. It is dimensioned for normal operation of the grinding wheel is sufficient.
- the tensioning device easily without tools possible because the torque limit described excessive tightening of the tensioning disc (4) prevented from the nut part (1,2) and the axial needle bearing (9) is provided.
- the Belleville washer (10) ensure that the tensioning washer (4) loosens against the nut part (1,2) before the The clamping disc (4) detaches from the grinding disc. This is cheap, because otherwise the tensioning device in the braced Condition would be unscrewed from the threaded spindle.
- the described mode of action takes place in a flat Characteristic range of the plate spring (10) instead.
- the Spring distance is only a fraction of a um, for example 2/10 ⁇ m.
- the The clamping device has a diaphragm spring (10) Preload.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Claims (11)
- Spanneinrichtung zum Festlegen eines scheibenförmigen Werkzeugs, insbesondere Schleifscheibe, an einer Gewindespindel einer Handwerkzeugmaschine, wobei ein auf die Gewindespindel aufschraubbares Mutterteil eine Spannscheibe gegen das Werkzeug drückt und zwischen dem Mutterteil und der Spannscheibe ein Axial-Wälzlager angeordnet ist,
dadurch gekennzeichnet,
daß zwischen der Spannscheibe(4) und dem Mutterteil(1,2) eine das Axial-Wälzlager an seinem Außenumfang umschließende Feder(10) angeordnet ist, wobei die Feder zur Übertragung des Drehmoments von der Gewindespindel auf das Werkzeug eine Reibschlußverbindung zwischen dem Mutterteil(1,2) und der Spannscheibe(4) bildet und das Axial-Wälzlager(9) die Spannscheibe(4) am Mutterteil(1,2) axial abstützt, und daß bei Überschreiten eines oberen Grenzwertes des Drehmoments (Überlast) das Mutterteil(1,2) gegenüber der Spannscheibe(4) durchrutscht, wobei das Axial-Wälzlager (9) rotiert. - Spanneinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Feder eine Tellerfeder(10) ist. - Spanneinrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Feder(10) unter einer Vorspannung steht und das Einstellen und Lösen der Reibschlußverbindung in einem flachen Feder-Kennlinienbereich erfolgt. - Spanneinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß das Axial-Wälzlager ein Nadellager(9) ist. - Spanneinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Tellerfeder(10) das Axial-Wälzlager(9) in der radialen Ebene umschließt. - Spanneinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß sich die Tellerfeder(10) an einer Zwischenscheibe(8) abstützt, die mit dein Mutterteil(1,2) in Verbindung steht. - Spanneinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß das Mutterteil von einer Mutter(1) und einer an dieser verdrehfest angeordneten Glocke(2) gebildet ist. - Spanneinrichtung nach Anspruch 7,
dadurch gekennzeichnet,
daß die Glocke(2) die Spannscheibe(4) außen umgreift. - Spanneinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß am Mutterteil(1,2) eine schwenkbare Klappe(13) zur Betätigung des Mutterteils(1,2) gelagert ist. - Spanneinrichtung nach Anspruch 9,
dadurch gekennzeichnet,
daß die Klappe(13) mittels einer Feder(16) in Arretierstellung belastet ist. - Spanneinrichtung nach Anspruch 9 oder 10,
dadurch gekennzeichnet,
daß die Klappe(13) so gestaltet und angeordnet ist, daß sie sich unter Fliehkraftwirkung des rotierenden Mutterteils(1,2) aus der aufgeklappten Stellung an dieses anlegt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19509147 | 1995-03-14 | ||
| DE19509147A DE19509147C1 (de) | 1995-03-14 | 1995-03-14 | Spanneinrichtung zum Festlegen eines scheibenförmigen Werkzeugs |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0732174A2 EP0732174A2 (de) | 1996-09-18 |
| EP0732174A3 EP0732174A3 (de) | 1997-07-23 |
| EP0732174B1 true EP0732174B1 (de) | 1998-07-08 |
Family
ID=7756613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95120336A Expired - Lifetime EP0732174B1 (de) | 1995-03-14 | 1995-12-21 | Spanneinrichtung zum Festlegen eines Werkzeugs |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5707275A (de) |
| EP (1) | EP0732174B1 (de) |
| DE (2) | DE19509147C1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7722444B2 (en) | 2005-05-13 | 2010-05-25 | Black & Decker Inc. | Angle grinder |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19732263A1 (de) * | 1997-07-26 | 1999-01-28 | Schaeffler Waelzlager Ohg | Spanneinrichtung zum lösbaren Befestigen eines scheibenförmigen Werkzeugs |
| USD417598S (en) * | 1999-02-24 | 1999-12-14 | Black & Decker Inc. | Rotatable cutting tool |
| USD424076S (en) * | 1999-02-24 | 2000-05-02 | Black & Decker Inc. | Mounting device for a cutting tool |
| US6439091B1 (en) * | 1999-04-19 | 2002-08-27 | Black & Decker Inc. | Clutch mechanism |
| DE10017458A1 (de) * | 2000-04-07 | 2001-10-18 | Bosch Gmbh Robert | Schleifmaschinenwerkzeugaufnahme |
| DE10017457A1 (de) * | 2000-04-07 | 2001-10-11 | Bosch Gmbh Robert | Schleifmaschinenwerkzeugaufnahme |
| DE10030586A1 (de) * | 2000-06-21 | 2002-01-10 | Bruno Schmitz Schleifmittelwer | Werkzeug |
| US6645058B2 (en) | 2000-11-30 | 2003-11-11 | Black & Decker Inc. | Clamp mechanism for rotary tool disc |
| US6863596B2 (en) * | 2001-05-25 | 2005-03-08 | 3M Innovative Properties Company | Abrasive article |
| DE10136459A1 (de) * | 2001-07-26 | 2003-02-13 | Bosch Gmbh Robert | System mit einer Werkzeugaufnahme |
| US6743085B2 (en) | 2001-11-20 | 2004-06-01 | 3M Innovative Properties Company | Rotating back up abrasive disc assembly |
| DE10205848C2 (de) * | 2002-02-13 | 2003-12-04 | Metabowerke Gmbh | Spannmutter zum Fixieren eines scheibenförmigen Werkzeugs |
| DE102014102705B4 (de) | 2014-02-28 | 2020-06-18 | Metabowerke Gmbh | Spannmutter |
| US10818450B2 (en) | 2017-06-14 | 2020-10-27 | Black & Decker Inc. | Paddle switch |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2156770C3 (de) * | 1971-11-16 | 1974-06-20 | Hermann 7031 Maichingen Hefner | Vorrichtung zur lösbaren Befestigung einer Schleifscheibe oder dergleichen auf einer Treibspindel |
| DE3012836C2 (de) * | 1980-04-02 | 1985-09-26 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Einrichtung zum Festspannen der Schleifscheibe von Winkelschleifern |
| DE3644444A1 (de) * | 1986-12-24 | 1988-07-07 | Pav Praezisions Apparatebau Ag | Messkluppe |
| DE3644441A1 (de) * | 1986-12-24 | 1988-07-07 | Bosch Gmbh Robert | Spanneinrichtung zum loesbaren befestigen eines werkzeuges, insbesondere einer scheibe |
| DE3702142C2 (de) * | 1987-01-24 | 1995-09-21 | Bosch Gmbh Robert | Spanneinrichtung zum axialen Festspannen eines Werkzeuges, insbesondere eines als Scheibe ausgestalteten spanenden Werkzeuges |
| DE3705638C1 (de) * | 1987-02-21 | 1988-09-08 | Bosch Gmbh Robert | Spanneinrichtung zum axialen Festspannen eines scheibenfoermigen Werkzeuges,insbesondere einer Schleifscheibe,an einem Flansch einer angetriebenen Spindel |
| DE3841181A1 (de) * | 1988-12-07 | 1990-06-13 | Bosch Gmbh Robert | Handwerkzeugmaschine mit einer mehrteiligen handbetaetigbaren schnellspanneinrichtung |
| DE3917345A1 (de) * | 1989-05-27 | 1990-11-29 | Licentia Gmbh | Einrichtung zum drehfesten vereinigen scheibenfoermiger bearbeitungswerkzeuge mit der arbeitsspindel von elektrowerkzeugen |
| NZ239780A (en) * | 1990-09-12 | 1995-10-26 | Norman Leslie Matthews | Reduced friction fastener; low friction material between threaded hub and thrust disc |
| DE4031725A1 (de) * | 1990-10-06 | 1992-04-09 | Bosch Gmbh Robert | Schnellspanneinrichtung, insbesondere zum befestigen scheibenfoermiger werkzeuge an einer antriebsspindel einer handwerkzeugmaschine |
| JPH081805Y2 (ja) * | 1991-03-20 | 1996-01-24 | リョービ株式会社 | 工具の着脱装置 |
| FR2698032B1 (fr) * | 1992-11-16 | 1995-10-06 | Metabowerke Gmbh | Dispositif de serrage rapide destine au serrage axial d'un outil en forme de disque. |
| DE4243328C1 (de) * | 1992-12-22 | 1994-06-09 | Metabowerke Kg | Schnellspanneinrichtung zum axialen Festspannen eines scheibenförmigen Werkzeugs |
| DE4238466C1 (de) * | 1992-11-16 | 1994-01-20 | Metabowerke Kg | Schnellspanneinrichtung zum axialen Festspannen eines scheibenförmigen Werkzeugs |
-
1995
- 1995-03-14 DE DE19509147A patent/DE19509147C1/de not_active Expired - Lifetime
- 1995-12-21 EP EP95120336A patent/EP0732174B1/de not_active Expired - Lifetime
- 1995-12-21 DE DE59502759T patent/DE59502759D1/de not_active Expired - Lifetime
-
1996
- 1996-01-31 US US08/594,472 patent/US5707275A/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7722444B2 (en) | 2005-05-13 | 2010-05-25 | Black & Decker Inc. | Angle grinder |
| US8087977B2 (en) | 2005-05-13 | 2012-01-03 | Black & Decker Inc. | Angle grinder |
| US8087976B2 (en) | 2005-05-13 | 2012-01-03 | Black & Decker Inc. | Trigger assembly for angle grinder |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0732174A2 (de) | 1996-09-18 |
| DE59502759D1 (de) | 1998-08-13 |
| EP0732174A3 (de) | 1997-07-23 |
| DE19509147C1 (de) | 1996-05-23 |
| US5707275A (en) | 1998-01-13 |
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