EP0447408B1 - Handwerkzeugmaschine mit einer mehrteiligen handbetätigbaren schnellspanneinrichtung - Google Patents

Handwerkzeugmaschine mit einer mehrteiligen handbetätigbaren schnellspanneinrichtung 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)
French (fr)
Other versions
EP0447408A1 (de
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/de
Application granted granted Critical
Publication of EP0447408B1 publication Critical patent/EP0447408B1/de
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)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Earth Drilling (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP89911766A 1988-12-07 1989-10-26 Handwerkzeugmaschine mit einer mehrteiligen handbetätigbaren schnellspanneinrichtung Expired - Lifetime EP0447408B1 (de)

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 1988-12-07
DE3841181A DE3841181A1 (de) 1988-12-07 1988-12-07 Handwerkzeugmaschine mit einer mehrteiligen handbetaetigbaren schnellspanneinrichtung

Publications (2)

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

Family

ID=6368624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89911766A Expired - Lifetime EP0447408B1 (de) 1988-12-07 1989-10-26 Handwerkzeugmaschine mit einer mehrteiligen handbetätigbaren schnellspanneinrichtung

Country Status (7)

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

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
ES2101751T3 (es) * 1990-09-12 1997-07-16 Norman Leslie Matthews Fiador.
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 (de) * 1992-05-13 1996-01-03 SCHOBER GmbH Werkzeug- und Maschinenbau Messerhalter
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.
US5567100A (en) * 1993-03-15 1996-10-22 Power Tool Holders Incorporated Torque enhancing clamping nut
US5577872A (en) * 1993-03-15 1996-11-26 Power Tool Holders Incorporated Torque enhancing tightening screw
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
US6843627B2 (en) 2001-12-12 2005-01-18 Credo Technology Corporation Wrenchless blade clamp assembly
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 (de) * 2017-10-27 2019-05-01 HILTI Aktiengesellschaft Spannvorrichtung und handwerkzeugmaschine
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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE3603384A1 (de) * 1986-02-05 1987-08-06 Bosch Gmbh Robert Vorrichtung zum loesbaren befestigen eines scheibenfoermigen werkzeugs
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
ATE84253T1 (de) 1993-01-15
JPH04502128A (ja) 1992-04-16
WO1990006210A1 (de) 1990-06-14
US5161334A (en) 1992-11-10
BR8907809A (pt) 1991-08-13
DE3841181A1 (de) 1990-06-13
EP0447408A1 (de) 1991-09-25
DE3841181C2 (ja) 1990-11-29
DE58903244D1 (de) 1993-02-18

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