WO2006005354A1 - Schnellspanneinrichtung - Google Patents
Schnellspanneinrichtung Download PDFInfo
- Publication number
- WO2006005354A1 WO2006005354A1 PCT/EP2004/007504 EP2004007504W WO2006005354A1 WO 2006005354 A1 WO2006005354 A1 WO 2006005354A1 EP 2004007504 W EP2004007504 W EP 2004007504W WO 2006005354 A1 WO2006005354 A1 WO 2006005354A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clamping
- tool
- spindle
- quick
- mushroom
- Prior art date
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
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
Definitions
- the invention relates to a tendon tensioning device for axially clamping a disk-shaped tool, in particular a grinding wheel on a flange of a driven spindle.
- the spindle is held with a fork wrench or a built-Spindelarret mich after placement of the grinding wheel and it is then placed a clamping nut by hand and tightened by means of a key.
- the spindle starts up abruptly, so that due to the inertia, an automatic tightening of the grinding wheel takes place.
- the clamping device continues to pull itself.
- DE 42 43 328 Cl discloses a design in which the clamping element consists of a relative to the spindle rotatable clamping part and a screw-threaded part on the part, which are rotatable against each other, and wherein between the two clamping parts or between the spindle and on the Threaded screw-on clamping part is provided a relative movement between the two clamping parts at least partially reducing device.
- a relative movement between the two clamping parts at least partially reducing device may be provided, for example, an O-ring.
- DE 43 05 317 Al discloses a design in which a friction element is held in the clamping nut, and bears against the spindle under frictional engagement, for braking a relative movement between the spindle and the clamping nut.
- DE 102 05 848 discloses a design in which a pressure ring which can be braced with the tool is provided in the nut.
- the invention therefore has the object to provide an alternative solution that allows clamping and retightening a tool, while preventing accidental release of the tool from the threaded spindle z. B. when braking the spindle.
- the invention solves this problem by a
- Tendon tensioning device of the generic type in which the spindle has an axially extending bore, in which at least one tensioning element acting in particular in the axial direction is arranged, which cooperates with a tensioning mushroom, whereby the tool can be clamped between abutment surfaces of the flange and of the tensioning mushroom which are mutually variable. wherein a bolt of the clamping mushroom in the bore of the spindle can be received and frictionally secured by the clamping element.
- the design provided here according to the invention makes it possible to dispense with frictional locking by means of a nut or a clamping screw which engages in an internal thread of the spindle Layout. In this way, in particular by the purely axial support unintentional release is avoided.
- the head of the clamping fungus can only slightly protrude beyond the tool. Unlike a mother, in which the holder and thus the traction in the region of the mother and thus takes place axially outside of the tool, the determination takes place in the region of the bolt of the clamping fungus and thus in the spindle, which does not protrude beyond the tool.
- the clamping mushroom is held under frictional engagement in the clamping element, which may be in particular in the clamping element to disc springs.
- the disc springs may be provided here as a slotted disc spring package, which are arranged inclined in the radial direction, wherein preferably the outer periphery of the plate spring packet in the direction of the tool, and the inner periphery of the plate spring assembly in the direction of an electric hand tool in which the quick-release device is provided.
- first clamping can already be applied after a first design bias before inserting the clamping mushroom.
- it may further proceed that a first or further tension by means of a clamping device which may correspond to the biasing means which acts on aids on the disc spring assembly, and this loaded so that the inner diameter of the disc spring assembly is reduced, is applied.
- the clamping device may be designed so that in particular an adjusting element, such as a lever may be provided, wherein the lever is equipped with a toothed segment, and the lever cooperates with its toothed segment with a toothing, another element, directly or indirectly causes a tension of the clamping element.
- an adjusting element such as a lever
- the lever can be applied in a first position, in particular to the Sehne11spannvoriques in which the sector gear is disengaged. The lever can then be brought to a second position, for example by being pivoted about a pivot point in which the teeth of the lever engage with the teeth of the further element.
- the lever in a further movement about its pivot axis performs an adjusting movement, whereby a clamping of the clamping element is achieved.
- the provision of the lever can then be done manually or automatically in the first position. The release of the voltage takes place in the reverse manner.
- a friction element or a spring element is provided between the flange and the tool in order to achieve a secure contact between flange and tool when loosening or retightening.
- this additional element which can be formed in particular by a friction element or a plate spring, a force and torque transmission between the flange and disc is to be ensured.
- the device according to the invention Due to the fact that no spindle protruding from the tool is provided, the device according to the invention has the advantage that, even with different slice thicknesses, the spindle does not protrude out of the tool. In particular, in the case of grinding wheels with a low overall height, there is the disadvantage in the prior art that the spindle then protrudes axially clearly beyond the tool and that injuries to the workpiece during machining by the tool spindle can occur.
- the design according to the invention has the advantage that commercially available grinding wheels and other disc-shaped processing means can be used and not - as provided in the prior art, special grinding wheels must be used, if a braking device is provided.
- the system according to the invention has the advantage of a quick change of the tool allow, without the spindle must be locked, since no rotational movement for changing the tool and for new clamping or loosening is necessary.
- a tongue and groove arrangement can be provided, whereby the clamping mushroom is directly coupled to the spindle. This additionally ensures that frictional forces in the circumferential direction must not be absorbed by the clamping element.
- the post-tensioning effect is reversed, i. the tool continues to rotate with respect to the flange, thus causing a release of the tension of the tensioning element, in particular of the disk springs, which are increasingly inclined again.
- the springs transmit only axial and no radial forces, so that the clamping fungus can then be easily lifted out of the opening, as soon as the clamping torque is released. The use of tools for changing is therefore usually not necessary.
- the invention comprises an electric hand tool, in particular an angle grinder with a tendon tensioning device according to the preceding claims.
- an electric hand tool in particular an angle grinder with a tendon tensioning device according to the preceding claims.
- Figure 1 shows a part of a housing of an angle grinder, with a quick-release device according to the invention
- FIG. 2 shows a detail view from FIG. 1.
- Figure 1 shows a housing 10 for receiving a drive shaft in an opening 12 of the housing 10, which communicates with a spindle 14 for driving a tool 16, which is here formed by a grinding wheel.
- a transmission (not shown) is arranged in the housing 10.
- the grinding wheel is in this case clamped by means of a quick-release device, which is provided in its entirety by the reference numeral 18.
- the tendon tensioning device 18 in this case comprises an electromachine-side part 20, as well as a tensioning mushroom 22, which cooperates with the part 20.
- FIG. 2 shows a section without a tool from FIG. 1 with the quick-action clamping device 18.
- the chordal tensioning device 18 here comprises a flange 24, against which the grinding wheel 16 abuts.
- the grinding wheel 16 is placed on the flange 24, and the clamping mushroom 22 in an opening provided a cylinder 26 which cooperates with the spindle 14 and is part of the spindle 14, introduced.
- the cylinder 26 has in its interior disc springs 28 which are formed as slotted disc springs and whose outer diameter is closer to the grinding wheel 16 than its inner diameter. In this case, only a small gap between the bolt 30 of the clamping mushroom 22 and the inner diameter of the cup spring assembly 28 is provided.
- a biasing device 32 may be provided which causes a cog 34 and a ramp arrangement buckling of the plate springs 28 in the form that they are with respect narrow their inner diameter.
- the adjustment takes place via a waste of the lever 33, which is connected to a toothed segment, which is engageable via a first pivoting movement with the gear 34 in engagement and triggers a further pivoting a clamping.
- the lever 33 is shown here in its applied basic position in which it is disengaged.
- the grinding wheel 16 initially remains due to the inertia of the mass, whereupon, as a result of a rotation of the flange 24 and a relative movement resulting therefrom, the cup spring pact is loaded and a tensioning of the clamping mushroom 22 is achieved.
- the tensioning mushroom 22 has webs or springs 31 in the region of its bolt 30, which engage in grooves 29 of the spindle 14, so that here a direct torque transmission and decoupling is provided by the tool.
- the quick-change system 18 also offers the advantages of securely holding the grinding wheel even when the spindle is being decelerated, with conventional grinding wheels that can be used at the same time being manufactured.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE502004010250T DE502004010250D1 (de) | 2004-07-08 | 2004-07-08 | Schnellspanneinrichtung |
EP04740807A EP1763419B1 (de) | 2004-07-08 | 2004-07-08 | Schnellspanneinrichtung |
US11/631,369 US7789737B2 (en) | 2004-07-08 | 2004-07-08 | Rapid locking device |
PCT/EP2004/007504 WO2006005354A1 (de) | 2004-07-08 | 2004-07-08 | Schnellspanneinrichtung |
AT04740807T ATE445481T1 (de) | 2004-07-08 | 2004-07-08 | Schnellspanneinrichtung |
CNB2004800435493A CN100534717C (zh) | 2004-07-08 | 2004-07-08 | 快速夹紧装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2004/007504 WO2006005354A1 (de) | 2004-07-08 | 2004-07-08 | Schnellspanneinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006005354A1 true WO2006005354A1 (de) | 2006-01-19 |
Family
ID=34957910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/007504 WO2006005354A1 (de) | 2004-07-08 | 2004-07-08 | Schnellspanneinrichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US7789737B2 (de) |
EP (1) | EP1763419B1 (de) |
CN (1) | CN100534717C (de) |
AT (1) | ATE445481T1 (de) |
DE (1) | DE502004010250D1 (de) |
WO (1) | WO2006005354A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3928925A1 (de) * | 2020-06-22 | 2021-12-29 | Hilti Aktiengesellschaft | Werkzeugmaschine mit einem scheibenförmigen werkzeug und verfahren zum befestigen bzw. zum lösen des werkzeugs |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8408974B2 (en) * | 2009-07-14 | 2013-04-02 | Black & Decker Inc. | Adapter for abrasive cutting wheels |
DE102011003100A1 (de) * | 2011-01-25 | 2012-07-26 | Robert Bosch Gmbh | Werkzeugspannvorrichtung |
JP5746645B2 (ja) | 2012-02-03 | 2015-07-08 | 株式会社マキタ | 作業工具 |
EP3012068B1 (de) * | 2014-10-24 | 2020-06-24 | Guido Valentini | Tragbares und/oder handgeführtes Elektrowerkzeug |
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 |
CN109866097B (zh) * | 2017-12-04 | 2020-12-01 | 南京德朔实业有限公司 | 电动工具及其启动方法 |
JP7096032B2 (ja) | 2018-03-28 | 2022-07-05 | 株式会社マキタ | マルチツール |
US11660690B2 (en) | 2019-11-28 | 2023-05-30 | Makita Corporation | Power tool |
US11590593B2 (en) | 2019-11-28 | 2023-02-28 | Makita Corporation | Power tool |
JP7422538B2 (ja) | 2019-12-26 | 2024-01-26 | 株式会社マキタ | 作業工具 |
JP7330914B2 (ja) | 2020-02-13 | 2023-08-22 | 株式会社マキタ | 振動工具 |
EP3960384A1 (de) | 2020-08-28 | 2022-03-02 | Black & Decker Inc. | Luftansaugkonfiguration in einem elektrowerkzeug |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157873A (en) * | 1991-01-16 | 1992-10-27 | C. & E. Fein Gmbh & Co. | Portable grinder with quick-acting chucking device |
DE4336620A1 (de) * | 1993-10-27 | 1995-05-04 | Fein C & E | Elektrowerkzeug |
DE10124971A1 (de) * | 2001-05-21 | 2002-11-28 | Hilti Ag | Schnellspanneinrichtung für eine Kreissäge |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3700968A1 (de) * | 1987-01-15 | 1988-08-04 | Bosch Gmbh Robert | Spanneinrichtung zum axialen festspannen eines werkzeuges, insbesondere einer scheibe |
DE3741484C1 (de) * | 1987-12-08 | 1989-08-24 | Fein C & E | Handwerkzeugmaschine mit automatischer Arretierung der Arbeitsspindel |
EP0521259B1 (de) * | 1991-07-05 | 1994-07-27 | C. & E. FEIN GmbH & Co. | Tragbare Werkzeugmaschine |
DE4305317C2 (de) * | 1993-02-20 | 1995-10-12 | Metabowerke Kg | Schnellspanneinrichtung zum axialen Festspannen eines scheibenförmigen Werkzeugs |
DE10017981A1 (de) * | 2000-04-11 | 2001-10-25 | Bosch Gmbh Robert | Werkzeugaufnahme |
DE10039739A1 (de) * | 2000-08-16 | 2002-02-28 | C & E Fein Gmbh & Co Kg | Elektrowerkzeug mit Schnellspanneinrichtung |
DE10205848C2 (de) * | 2002-02-13 | 2003-12-04 | Metabowerke Gmbh | Spannmutter zum Fixieren eines scheibenförmigen Werkzeugs |
DE102004020982A1 (de) * | 2004-04-23 | 2005-11-17 | C. & E. Fein Gmbh | Kraftgetriebenes Handwerkzeug mit Spanneinrichtung für ein Werkzeug |
-
2004
- 2004-07-08 CN CNB2004800435493A patent/CN100534717C/zh not_active Expired - Fee Related
- 2004-07-08 AT AT04740807T patent/ATE445481T1/de not_active IP Right Cessation
- 2004-07-08 EP EP04740807A patent/EP1763419B1/de not_active Not-in-force
- 2004-07-08 US US11/631,369 patent/US7789737B2/en not_active Expired - Fee Related
- 2004-07-08 DE DE502004010250T patent/DE502004010250D1/de active Active
- 2004-07-08 WO PCT/EP2004/007504 patent/WO2006005354A1/de not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157873A (en) * | 1991-01-16 | 1992-10-27 | C. & E. Fein Gmbh & Co. | Portable grinder with quick-acting chucking device |
DE4336620A1 (de) * | 1993-10-27 | 1995-05-04 | Fein C & E | Elektrowerkzeug |
DE10124971A1 (de) * | 2001-05-21 | 2002-11-28 | Hilti Ag | Schnellspanneinrichtung für eine Kreissäge |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3928925A1 (de) * | 2020-06-22 | 2021-12-29 | Hilti Aktiengesellschaft | Werkzeugmaschine mit einem scheibenförmigen werkzeug und verfahren zum befestigen bzw. zum lösen des werkzeugs |
WO2021259628A1 (de) * | 2020-06-22 | 2021-12-30 | Hilti Aktiengesellschaft | Werkzeugmaschine mit einem scheibenförmigen werkzeug und verfahren zum befestigen bzw. zum lösen des werkzeugs |
Also Published As
Publication number | Publication date |
---|---|
EP1763419A1 (de) | 2007-03-21 |
CN1997487A (zh) | 2007-07-11 |
ATE445481T1 (de) | 2009-10-15 |
EP1763419B1 (de) | 2009-10-14 |
US7789737B2 (en) | 2010-09-07 |
CN100534717C (zh) | 2009-09-02 |
US20080305727A1 (en) | 2008-12-11 |
DE502004010250D1 (de) | 2009-11-26 |
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