EP1507629A1 - Syst me dot d'un raccordement d'outil - Google Patents

Syst me dot d'un raccordement d'outil

Info

Publication number
EP1507629A1
EP1507629A1 EP03727169A EP03727169A EP1507629A1 EP 1507629 A1 EP1507629 A1 EP 1507629A1 EP 03727169 A EP03727169 A EP 03727169A EP 03727169 A EP03727169 A EP 03727169A EP 1507629 A1 EP1507629 A1 EP 1507629A1
Authority
EP
European Patent Office
Prior art keywords
tool
insert tool
insert
tool holder
sheet metal
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
Application number
EP03727169A
Other languages
German (de)
English (en)
Other versions
EP1507629B1 (fr
Inventor
Albrecht Hofmann
Harald Krondorfer
Markus Heckmann
Thomas Schomisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tyrolit-Schleifmittelwerke Swarovski KG
Robert Bosch GmbH
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski KG
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tyrolit-Schleifmittelwerke Swarovski KG, Robert Bosch GmbH filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Publication of EP1507629A1 publication Critical patent/EP1507629A1/fr
Application granted granted Critical
Publication of EP1507629B1 publication Critical patent/EP1507629B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • the invention relates to a system with a tool holder according to the preamble of claim 1.
  • a system with a grinding machine tool holder for a hand-held angle grinding machine and a grinding wheel is known from EP 0 904 896 A2.
  • the angle grinder has a drive shaft that has a thread on the tool side.
  • the grinding machine tool holder has a driver and a clamping nut.
  • the driver is pushed onto a collar of the drive shaft with a mounting opening and clamped non-positively against a bearing surface of the drive shaft via the clamping nut.
  • the driver has a collar which extends in the axial direction on the tool side and which is radially connected to two has opposite sides on its outer circumference recesses which extend in the axial direction to a bottom of the collar. Starting from the recesses, a groove extends in each case against the drive direction of the drive shaft on the outer circumference of the collar. The grooves are closed against the drive direction of the drive shaft and taper axially from the recesses against the drive direction of the drive shaft.
  • the grinding wheel has a hub with a mounting opening in which two opposite, radially inward-pointing tongues are arranged.
  • the tongues can be inserted into the recesses in the axial direction and then into the grooves in the circumferential direction, counter to the drive direction.
  • the grinding wheel is positively locked in the axial direction via the tongues in the grooves and non-positively fixed by the tapering contour of the grooves.
  • the force closure increases as a result of reaction forces acting on the grinding wheel, which act counter to the drive direction.
  • a stopper is arranged in the region of a recess on the circumference of the collar and is movably mounted in an opening in the axial direction. In a working position with the grinding wheel facing downwards, the stopper is deflected axially by gravity in the direction of the grinding wheel, closes the groove in the direction of the recess and blocks a movement of the tongue located in the groove in the drive direction of the drive shaft.
  • the invention is based on a system with a tool holder, which has a driving device, via which an insert tool can be operatively connected to a drive shaft, and an insert tool, which can be effectively connected to the driving device via at least one latching element movably mounted against a spring element, which engages in an operating position of the insert tool and the insert tool is positively fixed.
  • the tool holder and the insert tool have at least two coordinated, corresponding shaped elements for simplifying an assembly of the insert tool.
  • An advantageous and simple assembly of the insert tool can be achieved, in particular in that the shaped elements form a guide so that tensioning hooks of the driving device can automatically engage in corresponding recesses in the hub.
  • the corresponding shaped elements advantageously form a coding means with regard to at least one parameter in order to avoid the installation of an impermissible tool of the same type. It can be structurally simple to provide protection for a hand-held power tool and for the tool against damage and / or destruction due to any incorrect loading, as can be achieved in particular by a too high speed. Coding is conceivable on the basis of various parameters which the person skilled in the art considers useful, such as, for example, dimensioning of the application tool, a maximum permissible speed, application of the application tool, a material to be processed, etc. Electronic coding means are also conceivable with which, for example, a rotational speed of a motor or a drive unit can be limited depending on the insert tool or a power supply can be interrupted when an inadmissible insert tool is used.
  • the corresponding shaped elements are advantageously matched to one another with regard to the dimensioning of the insert tool, as a result of which, in particular, a correct assignment of a diameter of the insert tool to a rotational speed of the handheld power tool can be ensured and damage can be avoided.
  • a coding criterion such as, in particular, a thickness of the insert tool.
  • the molded element arranged on the tool holder is advantageously formed by a projection arranged on a collar of the tool holder and extending in the radial direction, and the molded element arranged on the insert tool is formed by a recess.
  • Large centering surfaces are available for simple and safe installation of the insert tool in the tool holder.
  • a radially inwardly extending projection is formed on the hub or on the insert tool and a recess is formed on the tool holder.
  • the projection be at a distance from an abutment surface in the axial direction.
  • the insertion tool can be rotated under the projection to reach a locking position become.
  • the head start represents an additional safeguard for the application tool and makes an additional contribution to safety for the operator.
  • At least three projections evenly distributed over the circumference are arranged on the tool holder.
  • the three projections span a clearly defined level and, with their end faces, form an advantageous contact surface for the insert tool.
  • the insert tool can simply be placed on the contact surface and rotated until the shaped elements are in a corresponding position. Finding and threading the retaining hooks into the corresponding recesses in the hub is thereby made significantly easier and jamming and jamming of the
  • the projection can be integrally formed on a separate component or advantageously be made in one piece with the tool holder, in the latter case additional components, assembly effort and costs being saved.
  • FIG. 1 shows a schematically illustrated angle grinder from above
  • FIG. 2 shows an exploded view of a system with a tool holder
  • FIG. 3 shows an enlarged representation of a driving flange from FIG. 2.
  • FIG. 1 shows an angle grinder 32 from above with an electric motor, not shown, which is mounted in a housing 34.
  • the angle grinder 32 can be guided via a first handle 36, which extends in the longitudinal direction and is integrated in the housing 34 on a side facing away from an insert tool 14, and via a second handle 40, which is attached to a gear housing 38 in the region of the insert tool 14 and extends transversely to the longitudinal direction.
  • Electric motor is via a transmission, not shown a drive shaft 16 can be driven, on the end of which facing toward the insert tool 14 a tool holder with a driving device 12 is arranged (FIG. 2).
  • the tool holder and the insert tool 14 form a system.
  • the tool holder has a driving flange 10, which forms a contact surface 30 for the insert tool 14 (FIGS. 2 and 3).
  • a collar 26 is formed on the driving flange 10 on a side facing the insert tool 14, by means of which the insert tool 14 with its centering bore 46 is radially centered in the assembled state.
  • Arranged on the collar 26 are three shaped elements 22 which are formed by projections which extend radially outward.
  • the molded elements 22, which are made in one piece with the collar 26, are distributed uniformly over an outer circumference of the collar 26 and are at a distance 28 from the contact surface 30 in the axial direction 54, 64. With its end facing the insert tool 14, the collar 26 projects beyond the shaped elements 22 in the axial direction 54.
  • a sheet metal plate 48 with three tension hooks 56 which are uniformly distributed in the circumferential direction 50, 52 and are formed in one piece and extend in the axial direction 54, is arranged for axially fixing the insert tool 14.
  • the clamping hooks 56 are integrally formed on the sheet metal plate 48 in a bending process.
  • the driving flange 10 When mounting the driving device 12, the driving flange 10, a spring element 58 and the sheet metal plate 48 are preassembled.
  • the spring element 58 is thereby placed on a non- here shown collar of the driving flange 10 is pushed, which points in the direction facing away from the insert tool 14.
  • the tensioning hooks 56 of the sheet metal plate 48 which have a hook-shaped extension at their free end with an inclined surface 94 pointing in the circumferential direction 52, are guided in the axial direction 54 through recesses 60 of the driving flange 10, in each case through widened regions 62 of the recesses 60 ( 2 and 3).
  • the spring element 58 By compressing and rotating the sheet metal plate 48 and the driving flange 10 against one another, the spring element 58 is pretensioned and the sheet metal plate 48 and the driving flange 10 are positively connected in the axial direction 54, 64, specifically by the hook-shaped extensions in narrow areas 66 of the recesses 60 are rotated (Fig. 2 and 3).
  • the sheet metal plate 48 is then, loaded by the spring element 58, supported on the contact surface 30 of the driving flange 10 via edges of the hook-shaped extensions which point axially in the direction facing away from the insert tool 14.
  • a spring element 18 formed by a helical spring and a driving disk 96 with three bolts 20 which are distributed uniformly over the circumference and extend in the axial direction 54 attached to a drive shaft 16 (Fig. 2).
  • the preassembled assembly consisting of the sheet metal plate 48, the spring element 58 and the driving flange 10, is then mounted on the drive shaft 16.
  • the bolts 20 are during assembly by on the circumference of the plate 48 molded tabs 68, which have bores 70, and are guided through through bores 72 in the driving flange 10 and, in the assembled state, reach through the through bores 72.
  • the sheet metal plate 48 and the driving plate 96 are secured against rotation relative to one another by the bolts 20.
  • the tool holder is secured on the drive shaft 16 with a screw 74.
  • the insert tool 14 formed by a cutting disc has a sheet metal hub 42 formed by a separate component, which in the circumferential direction 50, 52 has three uniformly distributed, cup-shaped recesses 76 which extend in the axial direction 54 and whose diameter is slightly larger than the diameter of the bolts 20.
  • the sheet metal hub 42 has three recesses 78 which are uniformly distributed in the circumferential direction 50, 52 and extend in the circumferential direction 50, 52 and each have a narrow and a wide region 80, 82.
  • the diameter of the centering bore 46 of the sheet metal hub 42 is selected such that the insert tool 14 can also be clamped onto a conventional angle grinding machine using a conventional clamping system with a clamping flange and a spindle nut. So-called downward compatibility is ensured.
  • the sheet metal hub 42 of the insert tool 14 has three form elements 24, which are evenly distributed in the circumferential direction 50, 52 over the circumference of the centering bore 46 (FIG. 2).
  • the shaped elements 24 are formed by recesses.
  • the form elements 22 of the tool holder and the form elements 24 of the insert tool 14 are coordinated, corresponding form elements to simplify assembly of the insert tool 14.
  • the corresponding form elements 22, 24 form a coding means for avoiding assembly of an inadmissible insert tool of the same type.
  • the corresponding ones Molded elements 22, 24 are coordinated with one another with regard to a diameter of the insert tool 14, so that insert tools for use in machines with high speed have a wide shaped element or a wide coding and insert tools for use in machines with low speed have a narrow shaped element or a narrow one encoding.
  • the sheet metal hub 42 of the insert tool 14 is a
  • the rivet connection is firmly connected to an abrasive and pressed and is made cup-shaped by a shape 44 pointing in the axial direction 64.
  • the insert tool 14 When the insert tool 14 is installed, the insert tool 14 with its centering bore 46 is pushed onto the part of the collar 26 which projects beyond the shaped elements 22 in the axial direction 54 and is radially precentered. The insert tool 14 comes to rest on contact surfaces 84 of the shaped elements 22. Twisting the insert tool 14 in the circumferential direction 50, 52 brings the shaped elements 22, 24 to congruence. The insert tool 14 or the sheet metal hub 42 can then slide in the axial direction 64 in the direction of the contact surface 30, and the sheet metal hub 42 comes to rest on the bolt 20.
  • the sheet metal hub 42 can be rotated counter to a drive direction 98.
  • the rotation of the sheet metal hub 42 causes on the one hand that the sheet metal hub 42 with its edge of the centering bore 46 in the distance 28 between the shaped elements 22 and
  • Sheet metal hub 42 are moved.
  • the sheet metal plate 48 with the tensioning hooks 56 is axially displaced in the direction 54 against the pressure of the spring element 58 through inclined surfaces, not shown, until the contact surfaces of the hook-shaped extensions in the arcuate, narrow areas 80 lent next to the recesses 78 of the sheet metal hub 42 to the system.
  • the pressure of the spring element 18 causes the drive plate 96 to slide upward.
  • the bolts 20 snap into the cup-shaped recesses 76 of the sheet metal hub 42 and secure them in a form-fitting manner in the circumferential direction 50, 52.
  • the recesses 86 of the driving plate 96 disengage from the locking pockets 88 of the bearing flange 90 and release the drive shaft 16.
  • an unlocking button 92 is pressed in the axial direction 64.
  • the unlocking button 92 presses the drive plate 96 in the axial direction 64, and the recesses 86 of the drive plate 96 come into engagement with the locking pockets 88.
  • the drive shaft 16 is locked.
  • the bolts 20 disengage from the recesses 76 of the sheet metal hub 42, and the sheet metal hub 42 can be rotated in the circumferential direction 52 until the tensioning hooks 56 can slide through the recesses 78.
  • the shaped elements 22, 24 come into a corresponding position, and the sheet metal hub 42 can be removed in the axial direction 54.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

L'invention concerne un système doté d'un raccordement d'outil comportant un dispositif d'entraînement (12), qui permet de mettre un outil rapporté (14) en liaison active avec un arbre d'entraînement (16). Ce dispositif d'entraînement comprend aussi un outil rapporté (14), qui peut être mis en liaison active avec ledit dispositif d'entraînement (12) par l'intermédiaire d'au moins un élément d'arrêt (20) logé mobile contre un élément ressort (18), cet élément d'arrêt s'enclenchant dans une position de fonctionnement de l'outil rapporté (14) et fixant ce dernier (14) par liaison de forme. L'invention est caractérisée en ce que, pour simplifier le montage de l'outil rapporté (14), le raccordement d'outil et l'outil rapporté (14) sont pourvus d'au moins deux éléments usinés (22, 24) adaptés l'un à l'autre.
EP03727169A 2002-05-18 2003-04-02 Syst me dot d'un raccordement d'outil Expired - Lifetime EP1507629B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10222292 2002-05-18
DE10222292A DE10222292A1 (de) 2002-05-18 2002-05-18 System mit einer Werkzeugaufnahme
PCT/DE2003/001079 WO2003097299A1 (fr) 2002-05-18 2003-04-02 Système doté d'un raccordement d'outil

Publications (2)

Publication Number Publication Date
EP1507629A1 true EP1507629A1 (fr) 2005-02-23
EP1507629B1 EP1507629B1 (fr) 2009-09-16

Family

ID=29413960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03727169A Expired - Lifetime EP1507629B1 (fr) 2002-05-18 2003-04-02 Syst me dot d'un raccordement d'outil

Country Status (6)

Country Link
US (1) US8167689B2 (fr)
EP (1) EP1507629B1 (fr)
JP (1) JP4504182B2 (fr)
CN (1) CN100563928C (fr)
DE (2) DE10222292A1 (fr)
WO (1) WO2003097299A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352291A1 (de) 2003-11-08 2005-06-02 Robert Bosch Gmbh Werkzeugaufnahmevorrichtung für ein Einsatzwerkzeug mit einer zumindest im Wesentlichen scheibenförmigen Nabe
DE10352288A1 (de) 2003-11-08 2005-06-09 Robert Bosch Gmbh Werkzeugaufnahmevorrichtung
DE10360252A1 (de) * 2003-12-20 2005-07-21 Robert Bosch Gmbh Werkzeugadapter
DE10360248A1 (de) 2003-12-20 2005-07-28 Robert Bosch Gmbh Einsatzwerkzeug für einen Winkelschleifer
DE10360246A1 (de) 2003-12-20 2005-07-28 Robert Bosch Gmbh Einsatzwerkzeug für eine Werkzeugmaschine
DE102004028529A1 (de) * 2004-06-11 2006-01-26 Robert Bosch Gmbh Werkzeugaufnahmevorrichtung für ein Einsatzwerkzeug
US9073195B2 (en) 2010-04-29 2015-07-07 Black & Decker Inc. Universal accessory for oscillating power tool
US8925931B2 (en) 2010-04-29 2015-01-06 Black & Decker Inc. Oscillating tool
US9186770B2 (en) 2010-04-29 2015-11-17 Black & Decker Inc. Oscillating tool attachment feature
US9149923B2 (en) 2010-11-09 2015-10-06 Black & Decker Inc. Oscillating tools and accessories
DE102011075228A1 (de) * 2011-05-04 2012-11-08 Robert Bosch Gmbh Werkzeugspannvorrichtung
US20120294466A1 (en) * 2011-05-18 2012-11-22 Stefan Kristo Temporary anchor for a hearing prosthesis
CN102814796B (zh) * 2011-06-09 2015-08-19 苏州宝时得电动工具有限公司 动力工具及应用于该动力工具的工作头和转接器
USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
DE202015106711U1 (de) * 2015-12-09 2017-03-10 Kolthoff Gabrovo Eood Werkzeug für Oberflächenfeinbearbeitungen
SE540067C2 (en) * 2016-04-25 2018-03-13 Soedra Skogsaegarna Ekonomisk Foerening Circular saw mounting device
USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
DE102017218622A1 (de) * 2017-04-12 2018-10-18 Robert Bosch Gmbh Schleifmittelvorrichtung, insbesondere Schleiftellervorrichtung oder Stütztellervorrichtung

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JPS6014840U (ja) * 1983-07-11 1985-01-31 三和研磨工業株式会社 砥石の取付構造
US4657428A (en) * 1985-09-10 1987-04-14 Wiley Edward R Quick change mechanism for circular saw blades and other spinning disc devices
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DE19504563A1 (de) 1995-02-11 1996-08-14 Stihl Maschf Andreas Spanneinrichtung zum axialen Festspannen eines scheibenförmigen Werkzeugs
JPH08309654A (ja) 1995-05-16 1996-11-26 Ryobi Ltd サンディング工具
JPH1199460A (ja) 1997-09-29 1999-04-13 Yanase Kk 回転研磨具
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Also Published As

Publication number Publication date
JP2005525944A (ja) 2005-09-02
CN1652899A (zh) 2005-08-10
EP1507629B1 (fr) 2009-09-16
CN100563928C (zh) 2009-12-02
US20110097978A1 (en) 2011-04-28
JP4504182B2 (ja) 2010-07-14
DE10222292A1 (de) 2003-12-04
DE50311920D1 (de) 2009-10-29
US8167689B2 (en) 2012-05-01
WO2003097299A1 (fr) 2003-11-27

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