EP0890420A1 - Wellenblockiereinrichtung und Ein/Ausschalter für ein kraftbetriebenes Werkzeug mit Drehantrieb - Google Patents

Wellenblockiereinrichtung und Ein/Ausschalter für ein kraftbetriebenes Werkzeug mit Drehantrieb Download PDF

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Publication number
EP0890420A1
EP0890420A1 EP98304909A EP98304909A EP0890420A1 EP 0890420 A1 EP0890420 A1 EP 0890420A1 EP 98304909 A EP98304909 A EP 98304909A EP 98304909 A EP98304909 A EP 98304909A EP 0890420 A1 EP0890420 A1 EP 0890420A1
Authority
EP
European Patent Office
Prior art keywords
switch
shaft
rotary tool
output shaft
tool
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Withdrawn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
EP98304909A
Other languages
English (en)
French (fr)
Inventor
Hau Chuen Elvis Kwam
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.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
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 Black and Decker Inc filed Critical Black and Decker Inc
Publication of EP0890420A1 publication Critical patent/EP0890420A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools

Definitions

  • the present invention relates to a rotary tool, in particular a rotary tool which is designed to drive a rotary working tool such as a rotating disc, screwdriver head, or engraving disc.
  • the invention relates in particular to a rotary tool which is designed to drive a variety of interchangeable rotary working tools.
  • the present invention further relates to an on/off switch for a power tool.
  • the tool comprises a housing in which an electric motor is provided which motor drives a tool output shaft either directly or through intermediate elements.
  • the output shaft terminates at its free end remote from the motor in a mount for releasably retaining one of a plurality of rotary working tools.
  • Known retaining elements include a collet structure (disclosed in US Patent No. 2,218,168) in which the output shaft is hollow and receives a collet in the forward end. Both the output shaft and the collet extend externally of the housing of the tool. A variety of working tools, each of which is provided with a shank, may be mounted on the output shaft by means of the collet.
  • US Patent No. 3,873,863 discloses a shaft lock which is activated by a push button which extends through an opening in the housing.
  • the present invention provides a rotary tool of the type which comprises an electric motor, which motor is connected to an output shaft for mounting a variety of interchangeable working tools, and is provided with an on/off switch for controlling the supply of electrical energy to the motor, and a shaft lock for securing the output shaft against rotation, characterised in that the on/off switch is provided with means for preventing activation of the shaft lock while the on/off switch is in the on position.
  • the present invention further provides an on/off switch for a rotary tool of the type which comprises an output shaft for mounting a variety of interchangeable working tools and is provided with a shaft lock to secure the shaft against rotation during removal and subsequent fitting of a working tool, characterised in that the on/off switch is provided with means for preventing activation of the shaft lock while the on/off switch is in the on position.
  • a rotary tool shown generally at 10, comprises a housing 2, in which is located an electric motor 4.
  • a tool output shaft 6 is driven by the motor 4 through intermediate elements, including a fan 8.
  • the output shaft 6 is hollow, and receives a collet 12 in the end 20 remote from the motor 4.
  • the collet 12 has a cylindrical base and a tapered head and is split such that the head includes several forward end portions 18 which are generally biased slightly radially outwardly.
  • the forward end 20 of the output shaft 6 is screw-threaded, and receives an internally screw-threaded collet nut 22 which is also hollow, and which is disposed about the collet head 16. Forward of the screw-threading, the collet nut 22 has a smooth tapered interior surface.
  • a variety of working tools may be used with the rotary tool 10 for example, a rotating disc, screwdriver head, engraving disc, etc.
  • Each working tool includes a shank.
  • the collet nut 22 In order to mount a working tool on the rotary tool 10 the collet nut 22 is loosened by unscrewing. As the nut 22 moves forwardly, the split forward end portions 18 of the collet head move away from each other due to their bias. The shank of the working tool is inserted through the open end of the nut 22 and between the forward ends 18 of the collet head. The nut 22 is tightened, forcing the forward ends 18 of the collet 12 together to hold the working tool shank securely within the output shaft 6. Rotation of the output shaft 6 causes rotation of the collet 12, and thus the working tool, due to the frictional contact between each element.
  • the squeezing of the collet forward end portions 18 against the working tool shank by the nut 22 serves to retain the collet 12 and working tool within the output shaft 6, as well as to increase the frictional grip of the collet 12 on the working tool shaft.
  • the rotary tool 10 includes a push button 24 which extends through an opening 26 in the housing 10.
  • the button 24 includes an integrally formed downwardly extending pin 28.
  • a coil spring 30 is disposed about the pin 28 and extends between the internal surface 32 of the button 24 and an inner ledge 34 formed in the housing 2 so as to bias the push button 24 radially outwardly away from the tool output shaft 6.
  • the rotary tool includes a push button 24 which extends through an opening in the housing.
  • the button 24 further includes a downwardly extending shaft 34 having a cylindrical main section 36 having a lower protrusion 38 of reduced diameter.
  • the output shaft 6 includes two openings 40 formed therein.
  • the coil spring 30 biases the push button 24 away from the output shaft openings 40 so that the protrusion 38 does not interfere with normal operation.
  • the button 24 is pushed at its external surface 42, the shaft 34 is forced radially inwardly against the spring bias until the protrusion 38 contacts the outer surface of the shaft 6.
  • the output shaft 6 may be rotated by grasping and rotating the collet nut 22, until the protrusion 38 is aligned with one of the openings 40 in the shaft 6.
  • the inward pressure on the button 24 causes the protrusion 38 to enter the opening 40, thereby securing the output shaft 6 against rotation. Further rotation of the nut 22 while the output shaft 6 is held stationary allows the nut 22 to be loosened and removed.
  • the on/off function is controlled by an internal on/off push-button switch 44 disposed near the rear of the housing 2.
  • a sliding switch 46 is disposed within and extends longitudinally along the housing 2 and includes a radially inward rear flange 48 which is disposed adjacent the internal button 44.
  • the sliding switch 44 includes a cover portion 50 which is disposed through a housing slot 52 adjacent and behind the shaft lock push button 24.
  • the cover portion 50 is hollow and includes a forward opening 54 which surrounds the rear portion of the push button 24.
  • the rear flange 48 With the slide switch 46 in the rear position, the rear flange 48 is out of contact with the internal on/off push button switch 44 and the cover portion 50 is disposed rearwardly of the external shaft lock push button 24. Accordingly, the tool is switched off, and the user has access to the shaft lock push button 24. Thus, the shaft lock can be actuated to change the tool and/or collet.
  • the slide switch cover portion 50 When the slide switch cover portion 50 is slided forwardly, the rear flange 48 contacts the internal on/off push button 44 to switch the tool on. Furthermore, the cover portion 50 is slided completely over the shaft lock push button 24 so as to prevent the shaft lock button 24 from being pushed. Accordingly, inadvertent actuation of the shaft lock when the tool is switched on is prevented.
  • the fan 8 is disposed between the tool output shaft 6 and motor output shaft 56.
  • the fan 8 is secured upon the motor output shaft 56, and the tool output shaft 6 is really a driven shaft disposed within an opening in the fan 8.
  • the fan 8 is non-conductive to isolate the motor 4 electrically from the metallic tool output shaft 6 and thus the working tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP98304909A 1997-07-08 1998-06-23 Wellenblockiereinrichtung und Ein/Ausschalter für ein kraftbetriebenes Werkzeug mit Drehantrieb Withdrawn EP0890420A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9714258 1997-07-08
GB9714258A GB2327054A (en) 1997-07-08 1997-07-08 Shaft locking

Publications (1)

Publication Number Publication Date
EP0890420A1 true EP0890420A1 (de) 1999-01-13

Family

ID=10815456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98304909A Withdrawn EP0890420A1 (de) 1997-07-08 1998-06-23 Wellenblockiereinrichtung und Ein/Ausschalter für ein kraftbetriebenes Werkzeug mit Drehantrieb

Country Status (3)

Country Link
EP (1) EP0890420A1 (de)
CN (1) CN1071176C (de)
GB (1) GB2327054A (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908300C1 (de) * 1999-02-26 2000-11-09 Fein C & E Bügelhalter für ein Handwerkzeug
EP1166973A1 (de) * 2000-06-23 2002-01-02 Black & Decker Inc. Spindelblockiervorrichtung mit Zahnrad und Hebel
WO2004026535A1 (de) * 2002-09-13 2004-04-01 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere winkelschleifmaschine
WO2005070626A1 (en) * 2004-01-16 2005-08-04 Robert Bosch Gmbh Rotating shaft locking mechanism
NL1033187C2 (nl) * 2007-01-08 2008-07-09 Bosch Gmbh Robert Elektrisch gereedschap, zoals een haakse slijper.
EP2018250A4 (de) * 2006-05-09 2010-10-20 Atlas Copco Tools Ab Tragbares elektrowerkzeug mit antriebswellensperre
CN104084869A (zh) * 2014-06-13 2014-10-08 常州旗德电器有限公司 一种打磨头以及含有打磨头的分体式打磨器
JP2019098465A (ja) * 2017-12-01 2019-06-24 株式会社マキタ 電動工具
US11858106B2 (en) 2019-08-08 2024-01-02 Black & Decker Inc. Power tools and power tools platform
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803454B4 (de) 1998-01-30 2018-11-29 Scintilla Ag Handgeführte Schlagbohrmaschine mit einer Arretiervorrichtung
DE10029898A1 (de) 2000-06-17 2001-12-20 Bosch Gmbh Robert Handwerkzeugmaschine
NL1025144C2 (nl) * 2003-12-30 2005-07-04 Bosch Gmbh Robert Elektrisch gereedschap met dubbel bedienbare schakelaar.
US7770660B2 (en) 2007-11-21 2010-08-10 Black & Decker Inc. Mid-handle drill construction and assembly process
US7735575B2 (en) 2007-11-21 2010-06-15 Black & Decker Inc. Hammer drill with hard hammer support structure
US7717192B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode drill with mode collar
US7762349B2 (en) 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch
US7798245B2 (en) 2007-11-21 2010-09-21 Black & Decker Inc. Multi-mode drill with an electronic switching arrangement
US7854274B2 (en) 2007-11-21 2010-12-21 Black & Decker Inc. Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing
US7717191B2 (en) 2007-11-21 2010-05-18 Black & Decker Inc. Multi-mode hammer drill with shift lock
DE102010029267A1 (de) 2010-05-25 2011-12-01 Robert Bosch Gmbh Elektrowerkzeug, insbesondere Bohrschrauber
WO2012040891A1 (en) * 2010-09-27 2012-04-05 Bosch Power Tools (China) Co., Ltd. Power tool with interlock system
GB2535981A (en) * 2015-02-13 2016-09-07 3D 2 0 Ltd Finishing system for 3D prints
EP3106266A1 (de) * 2015-06-17 2016-12-21 HILTI Aktiengesellschaft Steuerungsverfahren für eine elektrische werkzeugmaschine
CN106393007B (zh) * 2015-07-31 2019-06-14 南京德朔实业有限公司 扭矩输出工具及其附件装置
CN115816246A (zh) * 2022-12-13 2023-03-21 江苏大艺科技股份有限公司 一种磨削工具

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872951A (en) * 1973-11-06 1975-03-25 Black & Decker Mfg Co Spindle locking mechanism for rotary power device
DE2926469A1 (de) * 1979-06-30 1981-01-22 Licentia Gmbh Anordnung zum arretieren der antriebsspindel von elektrowerkzeugen
DE3001907A1 (de) * 1980-01-19 1981-07-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Vorrichtung zum arretieren der antriebsspindel von elektrowerkzeugen
US4754669A (en) * 1985-10-24 1988-07-05 Black & Decker Inc. Motor driven screwdriver with spindle lock
US5191968A (en) * 1991-09-23 1993-03-09 Ryobi Motor Products Corp. Shaft lock arrangement for a power tool
EP0612588A1 (de) * 1993-02-26 1994-08-31 Kress-elektrik GmbH + Co. Elektromotorenfabrik Schaltvorrichtung für Elektrowerkzeuge
DE19528924A1 (de) * 1995-08-05 1997-02-06 Scintilla Ag Elektrische Schlagbohrmaschine
US5601483A (en) * 1993-10-27 1997-02-11 C. & E. Fein Gmbh & Co. Power tool

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1020864A (en) * 1961-05-02 1966-02-23 Wadkin Ltd Improvements in or relating to machine tool operating heads
GB1136679A (en) * 1967-10-13 1968-12-11 Chicago Wheel & Mfg Co Portable motor driven power tool
US3873863A (en) * 1974-02-25 1975-03-25 Singer Co Double insulated electrically powered hand tool and coupler therefor
DE4239559C2 (de) * 1992-11-25 2000-12-21 Festo Ag & Co Handwerkzeugmaschine mit einer Blockiereinrichtung zum Blockieren der Werkzeugspindel beim Werkzeugwechsel
US5496139A (en) * 1994-09-19 1996-03-05 Snap-On Incorporated Collet lock arrangement for power tool

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872951A (en) * 1973-11-06 1975-03-25 Black & Decker Mfg Co Spindle locking mechanism for rotary power device
DE2926469A1 (de) * 1979-06-30 1981-01-22 Licentia Gmbh Anordnung zum arretieren der antriebsspindel von elektrowerkzeugen
DE3001907A1 (de) * 1980-01-19 1981-07-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Vorrichtung zum arretieren der antriebsspindel von elektrowerkzeugen
US4754669A (en) * 1985-10-24 1988-07-05 Black & Decker Inc. Motor driven screwdriver with spindle lock
US5191968A (en) * 1991-09-23 1993-03-09 Ryobi Motor Products Corp. Shaft lock arrangement for a power tool
EP0612588A1 (de) * 1993-02-26 1994-08-31 Kress-elektrik GmbH + Co. Elektromotorenfabrik Schaltvorrichtung für Elektrowerkzeuge
US5601483A (en) * 1993-10-27 1997-02-11 C. & E. Fein Gmbh & Co. Power tool
DE19528924A1 (de) * 1995-08-05 1997-02-06 Scintilla Ag Elektrische Schlagbohrmaschine

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908300C1 (de) * 1999-02-26 2000-11-09 Fein C & E Bügelhalter für ein Handwerkzeug
EP1166973A1 (de) * 2000-06-23 2002-01-02 Black & Decker Inc. Spindelblockiervorrichtung mit Zahnrad und Hebel
WO2004026535A1 (de) * 2002-09-13 2004-04-01 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere winkelschleifmaschine
US8096857B2 (en) 2002-09-13 2012-01-17 Robert Bosch Gmbh Power tool, in particular angle grinder
WO2005070626A1 (en) * 2004-01-16 2005-08-04 Robert Bosch Gmbh Rotating shaft locking mechanism
US7980325B2 (en) 2004-01-16 2011-07-19 Credo Technology Corporation Rotating shaft locking mechanism
EP2018250A4 (de) * 2006-05-09 2010-10-20 Atlas Copco Tools Ab Tragbares elektrowerkzeug mit antriebswellensperre
WO2008085029A1 (en) * 2007-01-08 2008-07-17 Robert Bosch Gmbh Electrical machine tool, such as an angle grinder, with spindle blocking device
NL1033187C2 (nl) * 2007-01-08 2008-07-09 Bosch Gmbh Robert Elektrisch gereedschap, zoals een haakse slijper.
CN104084869A (zh) * 2014-06-13 2014-10-08 常州旗德电器有限公司 一种打磨头以及含有打磨头的分体式打磨器
JP2019098465A (ja) * 2017-12-01 2019-06-24 株式会社マキタ 電動工具
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool
US11858106B2 (en) 2019-08-08 2024-01-02 Black & Decker Inc. Power tools and power tools platform
US11951604B2 (en) 2019-08-08 2024-04-09 Black & Decker Inc. Power tools and power tools platform
US12202118B2 (en) 2019-08-08 2025-01-21 Black & Decker Inc. Power tools and power tools platform

Also Published As

Publication number Publication date
GB9714258D0 (en) 1997-09-10
GB2327054A (en) 1999-01-13
CN1071176C (zh) 2001-09-19
CN1204567A (zh) 1999-01-13

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