EP2248629A1 - Schnellkupplungssystem für das Befestigen einer Schleifscheibe an die Drehwelle einer Handschleifmaschine - Google Patents

Schnellkupplungssystem für das Befestigen einer Schleifscheibe an die Drehwelle einer Handschleifmaschine Download PDF

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Publication number
EP2248629A1
EP2248629A1 EP09169664A EP09169664A EP2248629A1 EP 2248629 A1 EP2248629 A1 EP 2248629A1 EP 09169664 A EP09169664 A EP 09169664A EP 09169664 A EP09169664 A EP 09169664A EP 2248629 A1 EP2248629 A1 EP 2248629A1
Authority
EP
European Patent Office
Prior art keywords
ring nut
disc
abrasive disc
locking ring
diameter
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.)
Withdrawn
Application number
EP09169664A
Other languages
English (en)
French (fr)
Inventor
Giovanni Ficai
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.)
Ficai Giovanni
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2248629A1 publication Critical patent/EP2248629A1/de
Withdrawn legal-status Critical Current

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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

Definitions

  • the system that is the subject-matter of the finding can be also applied to polishing and cutting discs, and therefore, even if, in the description, reference will always be made to abrasive discs, the finding will be able to be advantageously applied to other types of discs such as, for example, flap discs.
  • the clamping of the abrasive discs is carried out between two steel flanges, the upper one of which is typically pulled by the rotary shaft by means of a (prismatic) mechanical coupling such as to transfer the torque of the machine to the plane annular surface thereof resting on the abrasive disc upper face, while the second lower ring nut is screwed on the machine shaft by pressing on the abrasive disc lower contact surface.
  • the lower threaded ring nut comprises a raised edge that is centred in the lower part of abrasive disc hole.
  • the threaded ring nut is arranged to be screwed on the grinding machine threaded shaft, typically the thread is M14 in most of the world, or W 5/8" in some Anglo-Saxon countries.
  • the rotation direction of the rotary shaft when the grinder is actuated causes a self-screwing due to the friction that is generated between the two flanges and the disc; such screwing and friction increasing as the resistant force applied at the disc periphery increases.
  • the abrasive disc can be removed from the rotary shaft through an apposite wrench that inserts in two holes drilled in the lower ring nut and a conventional hex wrench engaging on apposite lands obtained on the upper ring nut.
  • the disassembly is obtained by locking the drive shaft by means of an apposite device with which all the grinders are by now provided, and by applying a rotation in the direction opposite to the screwing with the free hand.
  • the (lower) threaded ring nut is not permanently secured to the abrasive disc, and therefore it has to be always positioned again at the time that said disc or a new disc is installed.
  • the riveting tightens the upper protective flange (which is mandatory in the U.S. market for all the grinding wheels exceeding 150 mm ⁇ ).
  • Object of the present finding is to allow using an abrasive disc of an unified standard type, both plane and with depressed centre, and of the most varied thicknesses, which includes a very simple threaded ring nut with M14 or W 5/8" pitch, generally made in Nylon, ABS, or anyhow plastic resins with high mechanical strength or, finally, in metal, which is obtained by machining or die casting, of a negligible cost relative to the cost of the abrasive disc.
  • the ring nut is disposable when the disc is worn out.
  • the threaded ring nut that is the subject-matter of the finding is integral to the disc, and is disposed of with the worn-out disc.
  • the advantages consist in the simultaneous screwing of the two items: abrasive disc and ring nut; in the non-necessity of using the clamping wrench, since the system of the two combined components is self-tightening.
  • the disc disassembly operation is simplified, since by locking the movement of the grinder shaft with the apposite device, a manual action of reverse rotation is sufficient to disassemble the disc.
  • the ring nut application procedure always takes place by glueing, by using an adhesive, for example, of the epoxy, cyanoacrylic, polyurethane type, and any adhesive having suitable mechanical characteristics.
  • the fixing ring nuts described in the two cases are manufactured by means of injection of Nylon or other equivalent and low cost material
  • Both types of ring nuts described above will be able to provide for a pair of holes 14 or also two pairs of holes (with mutually different distance between centres and diameter) for the insertion of the pins of a conventional wrench in the case of an unscrewing difficulty upon removing the disc from the grinding machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP09169664A 2009-05-07 2009-09-07 Schnellkupplungssystem für das Befestigen einer Schleifscheibe an die Drehwelle einer Handschleifmaschine Withdrawn EP2248629A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000034A ITPR20090034A1 (it) 2009-05-07 2009-05-07 Sistema di accoppiamento rapido di un disco abrasivo all'albero ruotante di una macchina smerigliatrice portatile

Publications (1)

Publication Number Publication Date
EP2248629A1 true EP2248629A1 (de) 2010-11-10

Family

ID=41698290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09169664A Withdrawn EP2248629A1 (de) 2009-05-07 2009-09-07 Schnellkupplungssystem für das Befestigen einer Schleifscheibe an die Drehwelle einer Handschleifmaschine

Country Status (2)

Country Link
EP (1) EP2248629A1 (de)
IT (1) ITPR20090034A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105798787A (zh) * 2015-12-31 2016-07-27 韶关大唐研磨材料有限公司 一种砂页盘
CN106514487A (zh) * 2015-09-10 2017-03-22 株式会社牧田 研磨机、罩以及锁紧螺母
CN110712126A (zh) * 2019-10-22 2020-01-21 台州鑫运数控设备有限公司 一种便拆装的工具磨床用砂轮
TWI694892B (zh) * 2019-04-24 2020-06-01 郭新政 砂輪機連接裝置以及具有砂輪機連接裝置的砂輪機

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018775A1 (de) * 1980-05-16 1981-11-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Vorrichtung zum arretieren der antriebsspindel von winkelschleifern
US4694615A (en) 1986-04-03 1987-09-22 Mackay Joseph H Jun Disposable depressed center grinding wheel having an integral mounting hub
WO1988004219A1 (fr) * 1986-12-10 1988-06-16 Robert Bosch Gmbh Outillage a main portatif, notamment meuleuse d'angle
FR2620365A1 (fr) * 1987-09-16 1989-03-17 Metabowerke Gmbh Dispositif de serrage d'outils en forme de disques sur la broche de travail d'une machine-outil portative, en particulier d'une meuleuse
US5287659A (en) 1991-05-17 1994-02-22 Black & Decker Inc. Tool element subassembly and method of manufacturing same
DE4239559A1 (de) * 1992-11-25 1994-05-26 Festo Kg Handwerkzeugmaschine mit einer Blockiereinrichtung zum Blockieren der Werkzeugspindel beim Werkzeugwechsel
EP1213107A1 (de) * 2000-12-07 2002-06-12 C. & E. Fein Gmbh & Co. KG Aufnahme zur Befestigung eines Werkzeugs an einer Antriebswelle und Adapter hierzu
EP1371450A1 (de) * 2002-06-13 2003-12-17 Positec Power Tools (Suzhou) Co., Ltd. Werkzeug mit Schnellspanneinrichtung zur Aufnahme eines rotierenden Werkzeuges
DE102005050836A1 (de) 2005-10-24 2007-04-26 Gerd Eisenblätter Gmbh Schleif- oder Polierwerkzeug mit Gewindeeinsatz
EP1795304A1 (de) * 2005-12-07 2007-06-13 Giovanni Ficai Schleifrad mit integraler Spannmutter
EP1872905A1 (de) * 2005-03-18 2008-01-02 Makita Corporation Arbeitswerkzeug
EP2045039A1 (de) * 2007-10-02 2009-04-08 Gerd Eisenblätter GmbH Schleif- oder Polierscheibe mit Gewindeeinsatz

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018775A1 (de) * 1980-05-16 1981-11-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Vorrichtung zum arretieren der antriebsspindel von winkelschleifern
US4694615A (en) 1986-04-03 1987-09-22 Mackay Joseph H Jun Disposable depressed center grinding wheel having an integral mounting hub
WO1988004219A1 (fr) * 1986-12-10 1988-06-16 Robert Bosch Gmbh Outillage a main portatif, notamment meuleuse d'angle
FR2620365A1 (fr) * 1987-09-16 1989-03-17 Metabowerke Gmbh Dispositif de serrage d'outils en forme de disques sur la broche de travail d'une machine-outil portative, en particulier d'une meuleuse
US5287659A (en) 1991-05-17 1994-02-22 Black & Decker Inc. Tool element subassembly and method of manufacturing same
DE4239559A1 (de) * 1992-11-25 1994-05-26 Festo Kg Handwerkzeugmaschine mit einer Blockiereinrichtung zum Blockieren der Werkzeugspindel beim Werkzeugwechsel
EP1213107A1 (de) * 2000-12-07 2002-06-12 C. & E. Fein Gmbh & Co. KG Aufnahme zur Befestigung eines Werkzeugs an einer Antriebswelle und Adapter hierzu
EP1371450A1 (de) * 2002-06-13 2003-12-17 Positec Power Tools (Suzhou) Co., Ltd. Werkzeug mit Schnellspanneinrichtung zur Aufnahme eines rotierenden Werkzeuges
EP1872905A1 (de) * 2005-03-18 2008-01-02 Makita Corporation Arbeitswerkzeug
DE102005050836A1 (de) 2005-10-24 2007-04-26 Gerd Eisenblätter Gmbh Schleif- oder Polierwerkzeug mit Gewindeeinsatz
EP1795304A1 (de) * 2005-12-07 2007-06-13 Giovanni Ficai Schleifrad mit integraler Spannmutter
EP2045039A1 (de) * 2007-10-02 2009-04-08 Gerd Eisenblätter GmbH Schleif- oder Polierscheibe mit Gewindeeinsatz

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106514487A (zh) * 2015-09-10 2017-03-22 株式会社牧田 研磨机、罩以及锁紧螺母
US10357868B2 (en) 2015-09-10 2019-07-23 Makita Corporation Grinder, cover, and lock nut
CN105798787A (zh) * 2015-12-31 2016-07-27 韶关大唐研磨材料有限公司 一种砂页盘
CN105798787B (zh) * 2015-12-31 2017-12-15 广东小太阳砂磨材料有限公司 一种砂页盘
TWI694892B (zh) * 2019-04-24 2020-06-01 郭新政 砂輪機連接裝置以及具有砂輪機連接裝置的砂輪機
CN110712126A (zh) * 2019-10-22 2020-01-21 台州鑫运数控设备有限公司 一种便拆装的工具磨床用砂轮
CN110712126B (zh) * 2019-10-22 2021-04-13 台州鑫运数控设备有限公司 一种便拆装的工具磨床用砂轮

Also Published As

Publication number Publication date
ITPR20090034A1 (it) 2010-11-08

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