EP0447408B1 - Outil manuel avec dispositif de serrage rapide a main en plusieurs parties - Google Patents

Outil manuel avec dispositif de serrage rapide a main en plusieurs parties Download PDF

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Publication number
EP0447408B1
EP0447408B1 EP89911766A EP89911766A EP0447408B1 EP 0447408 B1 EP0447408 B1 EP 0447408B1 EP 89911766 A EP89911766 A EP 89911766A EP 89911766 A EP89911766 A EP 89911766A EP 0447408 B1 EP0447408 B1 EP 0447408B1
Authority
EP
European Patent Office
Prior art keywords
threaded part
rolling
hand tool
tool according
thrust plate
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
Application number
EP89911766A
Other languages
German (de)
English (en)
Other versions
EP0447408A1 (fr
Inventor
Günter Schaal
Walter Barth
Gerd Berner
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.)
Robert Bosch GmbH
Original Assignee
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT89911766T priority Critical patent/ATE84253T1/de
Publication of EP0447408A1 publication Critical patent/EP0447408A1/fr
Application granted granted Critical
Publication of EP0447408B1 publication Critical patent/EP0447408B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9377—Mounting of tool about rod-type shaft
    • Y10T83/9379—At end of shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9464—For rotary tool

Definitions

  • the invention relates to a hand-held machine tool with a multi-part, manually operated quick-action clamping device for disc-shaped tools according to the generic preamble of the main claim.
  • Hand machine tools according to the generic term are primarily grinding machines. Such a machine is known with a quick release device according to WO 88/05386.
  • the disk-shaped tools are held on one side on a shoulder of a drive spindle and can be acted upon by a pressure plate of the clamping device on the other side.
  • the pressure plate concentrically engages around a threaded part, which is axially secured to it and is rotatably arranged.
  • a hand screw part surrounds the pressure plate in a sleeve-like manner and forms an annular space with this and the pressure plate, in which at least one roller bearing and a gear unit coupling the hand screw part, the threaded part and the pressure plate are arranged.
  • a disadvantage of the known handheld power tool is a relatively high and uncontrollable clamping force between the pressure plate and the tool as a result of the automatic clamping when this machine is in operation.
  • Another disadvantage is the complicated and fault-prone construction of the tensioning device. Vibrations and dust, in particular, impair the efficiency of the transmission.
  • the handheld power tool 1 shown in FIG. 1 has a quick-action clamping device 2, which holds a disk-shaped tool 3, in particular a grinding wheel, against a shoulder 4 of a drive spindle 5.
  • the quick release device 2 is screwed onto a thread 6 of the drive spindle 5 of the hand machine tool 1.
  • An annular disc-shaped pressure plate 7 of the quick-action clamping device 2 transmits its clamping force to the tool 3.
  • the pressure plate 7 is provided on the side facing away from the tool 3 with a circular groove 7 'in cross section, in which spherical rolling elements 8 of a first rolling bearing 9 are provided a cage 16, rollable storage.
  • an inner, ring-like plate spring 10' serves as a running surface which is positively coupled, entrainingly, to a hand screw part 11 on its outer diameter.
  • a second roller bearing 12, provided with a cage 17, is supported on a roll between the plate spring 10 'and an end face of a threaded part 13 of the quick release device 2.
  • the pressure plate 7 surrounds the threaded part 13 concentrically in a ring-like manner and is opposite this by a locking ring 15 against axial displacement secured.
  • the hand screw part 11 surrounds the pressure plate 7 and the threaded part 13 sleeve-like and is axially secured relative to these by appropriately designed stop-like projections 13 'and by sealing rings 18, 18'.
  • An annular space 14 is formed in the interior of the quick-action clamping device 2 by the arrangement of the pressure plate 7, the threaded part 13 and the screw-on screw part 11 described above.
  • a tool is clamped by means of the quick-action clamping device 2 in the following way:
  • the entire quick-action clamping device 2 is screwed - in the direction of the tool 3 - until the pressure plate 7 is in contact with the tool 3, that is to say a positive connection is achieved.
  • the threaded part 13 is rotated synchronously with the manual screw part 11, as long as the friction between the threaded part 13 and the thread of the drive spindle 5 or between the pressure plate 7 and the tool 3 - hereinafter referred to as "external” friction, is lower.
  • the friction of the parts forming a rolling planetary gear within the annular space 14 - hereinafter referred to as "internal" friction.
  • the size of the torque that can be transmitted can be defined in a defined manner by appropriate design of the rolling planetary gear, in particular by prestressing and dimensioning plate spring 10 or 19, dimensioning the rolling elements 8 and selecting the appropriate material.
  • sealing rings 18, 18 ' are arranged, which are to be sealed surfaces 18' on the hand screw part 11 and the threaded part 13 are assigned.
  • the threaded part 13 may rust on the drive spindle 5 the threaded part 13 is provided with engagement points 21, which enable the use of a separate tool for releasing the quick release device 2.
  • the roller bearing 9 is in direct frictional engagement with the hand screw part 11, as if the inner plate spring 10 'from FIG. 1 were a rigid, one-piece component of the hand screw part 11 in the form of a projection 20
  • the second roller bearing 12 is arranged such that it can roll between the projection 20 and an outer plate spring 19.
  • the outer plate spring 19 is braced on one side on the roller bearing 12 and on the other side on the threaded part 13 supported on a stop-like projection 13 '.
  • the arrangement of the plate spring 19 is provided for tolerance compensation within the quick-action clamping device or for producing the minimal frictional engagement required for a rolling planetary gear.
  • ball, roller or needle bearings can be used as roller bearings as required.
  • the quick release device 2 can also be designed as a screw instead of a nut.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Gripping On Spindles (AREA)
  • Earth Drilling (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Claims (10)

  1. Outillage motorisé à main (1) comportant un dispositif de serrage rapide (2) en plusieurs éléments, manoeuvrable à la main, et destiné à recevoir des outils (3) en forme de disques montés sur un arbre d'entraînement(5) et qui peuvent être maintenus par la force sur un côté par une plaque d'appui (7) du dispositif de serrage rapide (2), cette plaque (7) entourant concentriquement une pièce filetée (13) du dispositif (2) dans laquelle elle reste maintenue tout en pouvant tourner, un écrou à main (11) entourant comme une douille la partie filetée (13) et la plaque de pression (7) en délimitant avec celles-ci une chambre annulaire (14) contenant au moins un palier à roulement (9, 12) ainsi qu'un mécanisme accouplant ensemble l'écrou à main (11) la pièce filetée (13) et la plaque de pression (7), caractérisé en ce que le mécanisme est un mécanisme à roulement, en particulier un mécanisme à circulation de billes.
  2. Outillage motorisé à main selon la revendication 1, caractérisé en ce qu'au moins un des paliers à roulement (9, 12) constitue, en association avec des moyens élastiques l'organe du mécanisme qui accouple la plaque de pression (7), la pièce filetée (13) et l'écrou à main (11).
  3. Outillage motorisé selon la revendication 2, caractérisé en ce que les moyens élastiques sont constitués par une rondelle-ressort.
  4. Outillage motorisé selon les revendications 2 ou 3, caractérisé en ce que les corps roulants (8) d'un palier à roulement (9) sont accouplés avec transmission de mouvement, à la pièce filetée (13).
  5. Outillage motorisé à main selon la revendication 4, caractérisé en ce qu'il existe d'une part une sécurité, par verrouillage géométrique, contre la rotation entre la partie filetée (13) et un palier à roulement (9), d'autre part une liaison par friction entre les corps roulants (8) du palier (9), l'écrou à main (11) et la plaque de pression (7).
  6. Outillage motorisé à main selon la revendication 5, caractérisé en ce que la pièce filetée (13) est munie d'un anneau de sécurité (15) dans la zone entourée concentriquement par la plaque de pression (7).
  7. Outillage motorisé selon la revendication 6, caractérisé en ce que le volume annulaire (14) est rendu étanche au moyen d'anneaux d'étanchéité (18, 18′) montés dans des rainures (23) par friction.
  8. Outillage motorisé selon la revendication 7, caractérisé en ce que sur une des faces frontales de la rondelle-ressort (10) roule le train de billes d'un palier axial à billes (9) s'appuyant sur la plaque de pression (7) tandis que, sur l'autre face frontale roule le train de rouleaux d'un palier axial à rouleaux s'appuyant sur la pièce filetée (13).
  9. Outillage motorisé selon l'une des revendications 2 à 8, caractérisé en ce que la rondelle-ressort (10) est constituée par un prolongement (20) interne de l'écrou à main, tandis qu'une deuxième rondelle-ressort (19) est intercalée sous tension entre la pièce filetée (13) et le palier axial à rouleaux (12) dont il constitue également une surface de roulement.
  10. Outillage motorisé selon la revendication 9, caractérisé en ce que la rondelle-support (19) est en appui par frottement sur une bague d'étanchéité (18) montée dans l'écrou à main (11).
EP89911766A 1988-12-07 1989-10-26 Outil manuel avec dispositif de serrage rapide a main en plusieurs parties Expired - Lifetime EP0447408B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89911766T ATE84253T1 (de) 1988-12-07 1989-10-26 Handwerkzeugmaschine mit einer mehrteiligen handbetaetigbaren schnellspanneinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3841181 1988-07-12
DE3841181A DE3841181A1 (de) 1988-12-07 1988-12-07 Handwerkzeugmaschine mit einer mehrteiligen handbetaetigbaren schnellspanneinrichtung

Publications (2)

Publication Number Publication Date
EP0447408A1 EP0447408A1 (fr) 1991-09-25
EP0447408B1 true EP0447408B1 (fr) 1993-01-07

Family

ID=6368624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89911766A Expired - Lifetime EP0447408B1 (fr) 1988-12-07 1989-10-26 Outil manuel avec dispositif de serrage rapide a main en plusieurs parties

Country Status (7)

Country Link
US (1) US5161334A (fr)
EP (1) EP0447408B1 (fr)
JP (1) JPH04502128A (fr)
AT (1) ATE84253T1 (fr)
BR (1) BR8907809A (fr)
DE (2) DE3841181A1 (fr)
WO (1) WO1990006210A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7343841B2 (en) 2002-02-15 2008-03-18 Black & Decker Inc. Blade clamp assembly

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE148536T1 (de) * 1990-09-12 1997-02-15 Norman Leslie Matthews Befestigungsvorrichtung
DE4031725A1 (de) * 1990-10-06 1992-04-09 Bosch Gmbh Robert Schnellspanneinrichtung, insbesondere zum befestigen scheibenfoermiger werkzeuge an einer antriebsspindel einer handwerkzeugmaschine
DE4102420A1 (de) * 1991-01-28 1992-07-30 Bosch Gmbh Robert Handwerkzeugmaschine, insbesondere winkelschleifmaschine
JP3244718B2 (ja) * 1991-05-22 2002-01-07 株式会社マキタ 回転工具における回転刃具の固止装置
GB9204345D0 (en) * 1992-02-28 1992-04-08 Black & Decker Inc Improvements in or relating to flange locks
EP0569767B1 (fr) * 1992-05-13 1996-01-03 SCHOBER GmbH Werkzeug- und Maschinenbau Support de couteau
DE4231246C2 (de) * 1992-09-18 2002-06-13 Kolthoff & Co Spannflansch zum Spannen von Schleifwerkzeugen
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.
US5577872A (en) * 1993-03-15 1996-11-26 Power Tool Holders Incorporated Torque enhancing tightening screw
US5567100A (en) * 1993-03-15 1996-10-22 Power Tool Holders Incorporated Torque enhancing clamping nut
JPH0727121A (ja) * 1993-06-30 1995-01-27 Jacobs Japan Inc 締付け用ネジ
IT1266572B1 (it) * 1993-07-30 1997-01-09 Guido Valentini Congegno per il montaggio e la rimozione manuali di dischi operatori in utensili manuali per la lavorazione di superfici
US5871322A (en) * 1994-12-22 1999-02-16 Power Tool Holders Incorporated Clamp screw
DE19509147C1 (de) * 1995-03-14 1996-05-23 Atlas Copco Elektrowerkzeuge Spanneinrichtung zum Festlegen eines scheibenförmigen Werkzeugs
DE19541771A1 (de) * 1995-11-09 1997-05-15 Schaeffler Waelzlager Kg Schnellspannkupplung für Heimwerkermaschinen
AU3530497A (en) * 1996-12-05 1998-06-11 Power Tool Holders Incorporated Improved ball screw clamping device
US6273659B1 (en) 1997-02-17 2001-08-14 Power Tool Holders Incorporated Locking mechanism for a rotary working member
DE19732263A1 (de) * 1997-07-26 1999-01-28 Schaeffler Waelzlager Ohg Spanneinrichtung zum lösbaren Befestigen eines scheibenförmigen Werkzeugs
US6050741A (en) * 1998-01-30 2000-04-18 Power Tool Holders Incorporated Tool clamping device
US6179512B1 (en) 1998-05-29 2001-01-30 Power Tool Holders Incorporated Collet nut
DE19937436A1 (de) * 1999-08-07 2001-02-08 Schaeffler Waelzlager Ohg Spanneinrichtung zum lösbaren Befestigen eines Teils auf einer Welle
US6645058B2 (en) 2000-11-30 2003-11-11 Black & Decker Inc. Clamp mechanism for rotary tool disc
DE10258372B4 (de) 2001-12-12 2004-12-30 S-B Power Tool Company, Broadview Spannaufbau
DE10308743B3 (de) * 2003-02-28 2004-11-11 Hilti Ag Schnellspannmutter für scheibenförmige Werkzeuge
US7073992B2 (en) * 2003-06-24 2006-07-11 Irwin Industrial Tool Company Arbor for hole cutter and related method of use
US20060024142A1 (en) * 2004-08-02 2006-02-02 Ducret Lucien C Torque-limiting stud
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
US20070266837A1 (en) * 2006-05-22 2007-11-22 Nickels Richard C Clamp assembly
CN102126183B (zh) * 2010-01-12 2012-11-28 无锡佳特机械制造有限公司 烤板磨加工设备的磨头
US9636763B2 (en) * 2012-12-31 2017-05-02 Robert Bosch Tool Corporation Tool-free blade change system
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch
EP3476539A1 (fr) * 2017-10-27 2019-05-01 HILTI Aktiengesellschaft Dispositif de serrage et machine-outil manuelle
CN111515441A (zh) * 2020-05-06 2020-08-11 河南柴油机重工有限责任公司 一种轴承座侧壁加工用刀具组件、装置及应用

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GB825877A (en) * 1956-07-05 1959-12-23 Brown David Ind Ltd An improved construction of clamping-nut
DE1216654B (de) * 1961-05-25 1966-05-12 Hurth Masch Zahnrad Carl Zentrierende Spanneinrichtung
DE3012836C2 (de) * 1980-04-02 1985-09-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einrichtung zum Festspannen der Schleifscheibe von Winkelschleifern
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DE3700968A1 (de) * 1987-01-15 1988-08-04 Bosch Gmbh Robert Spanneinrichtung zum axialen festspannen 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
DE3831236A1 (de) * 1988-09-14 1990-03-15 Licentia Gmbh Einrichtung zum spannen und loesen eines auf der arbeitsspindel eines elektrowerkzeugs befindlichen scheibenfoermigen werkzeugs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7343841B2 (en) 2002-02-15 2008-03-18 Black & Decker Inc. Blade clamp assembly
US7832319B2 (en) 2002-02-15 2010-11-16 Black & Decker Inc. Blade clamp assembly

Also Published As

Publication number Publication date
JPH04502128A (ja) 1992-04-16
EP0447408A1 (fr) 1991-09-25
ATE84253T1 (de) 1993-01-15
WO1990006210A1 (fr) 1990-06-14
BR8907809A (pt) 1991-08-13
DE3841181A1 (de) 1990-06-13
US5161334A (en) 1992-11-10
DE58903244D1 (de) 1993-02-18
DE3841181C2 (fr) 1990-11-29

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