EP0224010A1 - Outil portatif à moteur pour perçage avec ou sans percussion - Google Patents

Outil portatif à moteur pour perçage avec ou sans percussion Download PDF

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Publication number
EP0224010A1
EP0224010A1 EP86114378A EP86114378A EP0224010A1 EP 0224010 A1 EP0224010 A1 EP 0224010A1 EP 86114378 A EP86114378 A EP 86114378A EP 86114378 A EP86114378 A EP 86114378A EP 0224010 A1 EP0224010 A1 EP 0224010A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
push button
drill
torque
motor
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
EP86114378A
Other languages
German (de)
English (en)
Other versions
EP0224010B1 (fr
Inventor
Karl Dr.-Ing. Wanner
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
Publication of EP0224010A1 publication Critical patent/EP0224010A1/fr
Application granted granted Critical
Publication of EP0224010B1 publication Critical patent/EP0224010B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003—Clutches specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/255—Switches
    • B25D2250/265—Trigger mechanism in handle

Definitions

  • the invention is based on a motor-driven hand tool according to the preamble of the main claim.
  • a hand tool is already known from DE-AS 22 29 388, but in which an additional handle for the hand tool is required to change the transmission torque.
  • One-handed drilling or impact drilling is therefore not possible.
  • switching the transmission torque with the additional handle requires a switching movement transverse to the longitudinal axis of the drill. This results in an undesirable cross loading of the drill and destabilizes the position of the hand tool in the operator's hands.
  • the hand tool according to the invention with the characterizing features of the main claim has the advantage lighter, even one-handed handling without atypical loading of the drill. Because of the pressure button in the grip area of the hand that also operates the pushbutton for the on and off switch for the hand tool, one-handed switching of the torque transmitted to the drill is possible without generating forces across the drill. In addition, the electromagnetically amplifiable driving force of the torque clutch means that no significantly increased actuation force is required. The position of the coupling within the housing of the hand tool remains independent of the position of the handle. This facilitates a compact construction, in which no empty spaces should arise in the housing if possible.
  • FIG. 1 An embodiment of the subject of the invention is shown in the drawing and explained in more detail in the following description.
  • the figure shows a partially longitudinally cut rotary hammer which is designed according to the invention.
  • a striking mechanism and a gear 5 for rotating drive are arranged in a housing 1 of a rotary hammer, which has a tool holder 2 and a handle.
  • a motor pinion 6 drives both a bushing 8 of a swash plate transmission and a spindle 9 via a gearwheel 7.
  • the drive for the socket 8 can optionally be switched on or off via a ball coupling 10.
  • This ball coupling is actuated by a bolt 11, the position of which can be selected in a known manner by means of a handle 12.
  • the rotation of the spindle 9 is transmitted through its pinion 13 to a gear 14.
  • the gear 14 is mounted concentrically to the tool holder 2 on a cylinder 15 which is part of the striking mechanism 4.
  • This cylinder 15 is designed in a known manner, not shown here, for the rotary driving of a drill 16 held in the tool holder 2.
  • the rotary movement of the gear wheel 14 is transmitted to the cylinder 15 by a clutch 17.
  • the clutch 17 is designed as a safety clutch that limits the torque transmitted.
  • the size of the torque transmitted here depends on the force with which a helical spring 18 urges the gearwheel 14 into the coupling position with the cylinder 15.
  • An electromagnet 19 which is mounted on the housing is arranged opposite the end face of the gearwheel 14 which faces away from the helical spring 18. It can be connected to voltage via leads 20 and 21 by means of a switch which can be actuated by a pushbutton 22.
  • a pushbutton is assigned to the pushbutton 22, which can be removed from its locked position with respect to the pushbutton 22 by means of a pushbutton 23. The pushbutton 22 is therefore locked against unintentional pressing when the pushbutton 23 is not actuated.
  • the push button 22 is below a conventional push button 24 for actuating the on and off switch for the motor of the hand tool. This push button 24 can be fixed in a known manner by means of a push button 25 in its switched-on position.
  • the usual transmission torque is initially used, the size of which is determined by the pressure of the helical spring 18. If, for example, the drill 16 hits a reinforcing iron while it is in operation, it can jam in the borehole. A higher driving torque is required to drill through this reinforcing iron.
  • the operator consciously adjusts to this situation and first presses the pushbutton 23 and then the pushbutton 22 released in this way.
  • the switch 19 operated with this pushbutton 22 energizes the electromagnet 19.
  • the magnetic field thus built up pulls the gearwheel 14 into the clutch engagement with the clutch 17 with increased force.
  • the driving torque of this clutch is thus increased in the desired manner.
  • the power supply for the electromagnet 19 is turned off.
  • the old transmission torque, determined by the helical spring 18, is established on the clutch 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP86114378A 1985-11-19 1986-10-17 Outil portatif à moteur pour perçage avec ou sans percussion Expired - Lifetime EP0224010B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853540964 DE3540964A1 (de) 1985-11-19 1985-11-19 Motorisch angetriebenes handwerkzeug fuer bohrenden oder schlagbohrenden betrieb
DE3540964 1985-11-19

Publications (2)

Publication Number Publication Date
EP0224010A1 true EP0224010A1 (fr) 1987-06-03
EP0224010B1 EP0224010B1 (fr) 1991-01-16

Family

ID=6286359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114378A Expired - Lifetime EP0224010B1 (fr) 1985-11-19 1986-10-17 Outil portatif à moteur pour perçage avec ou sans percussion

Country Status (3)

Country Link
US (1) US4776406A (fr)
EP (1) EP0224010B1 (fr)
DE (2) DE3540964A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261836A (en) * 1991-11-28 1993-06-02 Zanussi Elettrodomestici Pneumatic tool
GB2415161A (en) * 2004-05-27 2005-12-21 Bosch Gmbh Robert Hand-held power tool with slip clutch
WO2009156005A1 (fr) * 2008-06-24 2009-12-30 Robert Bosch Gmbh Procédé pour faire fonctionner une machine-outil pourvue d'un dispositif d'embrayage
WO2012159559A1 (fr) * 2011-05-23 2012-11-29 Bosch Power Tools (China)Co., Ltd Outil à moteur et mécanisme de commande de la transmission pour cet outil
CN103878752A (zh) * 2012-12-20 2014-06-25 罗伯特·博世有限公司 具有开关装置的工具机

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707051A1 (de) * 1987-03-05 1988-09-15 Bosch Gmbh Robert Verfahren zum unterbrechen der antriebstaetigkeit, insbesondere zumindest der schlagantriebstaetigkeit, einer handwerkzeugmaschine
DE3707052A1 (de) * 1987-03-05 1988-09-15 Bosch Gmbh Robert Verfahren zum unterbrechen der antriebstaetigkeit, insbesondere drehantriebstaetigkeit, einer handwerkzeugmaschine
DE4439590C2 (de) * 1994-11-05 1997-04-24 Bosch Gmbh Robert Handwerkzeugmaschine
US5689891A (en) * 1994-12-13 1997-11-25 Milwaukee Electric Tool Corp. Clutch mechanism for reciprocating saws
US5607023A (en) * 1994-12-13 1997-03-04 Milwaukee Electric Tool Corp. Impact absorption mechanism for power tools
USRE37211E1 (en) 1994-12-13 2001-06-12 Milwaukee Electric Tool Corporation Clutch mechanism for reciprocating saws
US5566458A (en) * 1994-12-13 1996-10-22 Milwaukee Electric Tool Corporation Clutch mechanism for reciprocating saws
DE19742916A1 (de) * 1997-09-29 1999-04-01 Westfalia Werkzeug Ansteuerung für einen an einem Spannungsnetz mit zwei Netzstromanschlüssen betriebenen Elektromotor
DE19937767B4 (de) * 1999-08-10 2004-09-09 Hilti Ag Handgeführter elektrischer Kombihammer
EP1301726A1 (fr) * 2000-07-20 2003-04-16 ZF FRIEDRICHSHAFEN Aktiengesellschaft Embrayage a une seule surface de friction exempt de bague glissante et a commande electromagnetique
DE10058994B4 (de) * 2000-11-28 2005-04-21 Robert Bosch Gmbh Bohr-und Meißelhammer
DE10219755A1 (de) * 2002-05-02 2003-11-13 Hilti Ag Überlastschutz für eine drehende Werkzeugmaschine
GB2392966B (en) * 2002-09-13 2006-05-31 Black & Decker Inc Rotary tool with overload clutch
EP2390062B1 (fr) * 2002-09-13 2017-03-08 Black & Decker Inc. Outil rotatif
DE10314957B4 (de) * 2003-04-02 2008-12-11 Robert Bosch Gmbh Bohrhammer mit einer Überrastkupplung
JP4509662B2 (ja) * 2004-06-16 2010-07-21 株式会社マキタ 電動打撃工具
JP4326452B2 (ja) * 2004-10-26 2009-09-09 パナソニック電工株式会社 衝撃工具
DE102006060880A1 (de) * 2006-12-22 2008-06-26 Metabowerke Gmbh Elektrohandwerkzeuggerät
DE102007000365A1 (de) * 2007-07-04 2009-01-08 Hilti Aktiengesellschaft Handwerkzeuggerät mit Rutschkupplung
JP5336781B2 (ja) * 2008-07-07 2013-11-06 株式会社マキタ 作業工具
US8348678B2 (en) * 2010-01-11 2013-01-08 Automotive Industrial Marketing Corp. Magnetic cable connector systems
DE102010038750A1 (de) * 2010-08-02 2012-02-02 Robert Bosch Gmbh Elektrowerkzeugmaschine mit arretierbarer Schaltwippe
JP6380560B2 (ja) * 2015-01-28 2018-08-29 工機ホールディングス株式会社 打撃工具
CN105415294A (zh) * 2015-12-28 2016-03-23 河南广度超硬材料有限公司 一种带有励磁装置的冲击钻

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942985U (de) * 1966-03-07 1966-07-28 Licentia Gmbh Durch einen reihenschlussmotor angetriebenes handwerkzeug.
DE2034363A1 (de) * 1970-07-10 1972-01-13 Coventry Gauge & Tool Co Ltd Überlast Rutschkupplung fur emstell bare Hochstdrehmomente
DE2157984B2 (de) * 1971-11-23 1976-06-24 Spezialnoje Konstruktorskoje Bjuro Po Projektirowaniju Agregatnych Stankow I Awtomatitscheskich Linij, Charkow (Sowjetunion) Schutzvorrichtung gegen drehmomentueberlastung insbesondere von werkzeugen und deren rotierenden antriebsteilen in werkzeugmaschinen
DE2755960A1 (de) * 1977-12-15 1979-06-21 Licentia Gmbh Motorisch angetriebenes heimwerkergeraet
DE2229388B2 (de) * 1972-06-16 1980-05-22 Robert Bosch Gmbh, 7000 Stuttgart Von Hand zu führender Bohrhammer
DE3039617A1 (de) * 1980-10-21 1982-05-19 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3103286A1 (de) * 1981-01-31 1982-08-12 Kress-elektrik GmbH & Co, Elektromotorenfabrik, 7457 Bisingen Elektrohandwerkzeugmaschine zum schrauben, bohren und eventuell schlagbohren
DE3235544A1 (de) * 1982-09-25 1984-03-29 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479986A (en) * 1947-08-11 1949-08-23 Albert G Thomas Clutch
US2617971A (en) * 1950-12-04 1952-11-11 Crane Packing Co Overload control for motors
DE1964083C3 (de) * 1969-12-22 1983-01-27 Robert Bosch Gmbh, 7000 Stuttgart Gesteinsbohrmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942985U (de) * 1966-03-07 1966-07-28 Licentia Gmbh Durch einen reihenschlussmotor angetriebenes handwerkzeug.
DE2034363A1 (de) * 1970-07-10 1972-01-13 Coventry Gauge & Tool Co Ltd Überlast Rutschkupplung fur emstell bare Hochstdrehmomente
DE2157984B2 (de) * 1971-11-23 1976-06-24 Spezialnoje Konstruktorskoje Bjuro Po Projektirowaniju Agregatnych Stankow I Awtomatitscheskich Linij, Charkow (Sowjetunion) Schutzvorrichtung gegen drehmomentueberlastung insbesondere von werkzeugen und deren rotierenden antriebsteilen in werkzeugmaschinen
DE2229388B2 (de) * 1972-06-16 1980-05-22 Robert Bosch Gmbh, 7000 Stuttgart Von Hand zu führender Bohrhammer
DE2755960A1 (de) * 1977-12-15 1979-06-21 Licentia Gmbh Motorisch angetriebenes heimwerkergeraet
DE3039617A1 (de) * 1980-10-21 1982-05-19 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3103286A1 (de) * 1981-01-31 1982-08-12 Kress-elektrik GmbH & Co, Elektromotorenfabrik, 7457 Bisingen Elektrohandwerkzeugmaschine zum schrauben, bohren und eventuell schlagbohren
DE3235544A1 (de) * 1982-09-25 1984-03-29 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261836A (en) * 1991-11-28 1993-06-02 Zanussi Elettrodomestici Pneumatic tool
GB2261836B (en) * 1991-11-28 1994-06-08 Zanussi Elettrodomestici Improved pneumatic tool
GB2415161A (en) * 2004-05-27 2005-12-21 Bosch Gmbh Robert Hand-held power tool with slip clutch
GB2415161B (en) * 2004-05-27 2006-12-13 Bosch Gmbh Robert Hand-held power tool, in particular rotary and/or impact hammer
US7303026B2 (en) 2004-05-27 2007-12-04 Robert Bosch Gmbh Hand power tool, in particular drill hammer and/or jackhammer
WO2009156005A1 (fr) * 2008-06-24 2009-12-30 Robert Bosch Gmbh Procédé pour faire fonctionner une machine-outil pourvue d'un dispositif d'embrayage
US8905153B2 (en) 2008-06-24 2014-12-09 Robert Bosch Gmbh Method for operating a power tool having a clutch device
WO2012159559A1 (fr) * 2011-05-23 2012-11-29 Bosch Power Tools (China)Co., Ltd Outil à moteur et mécanisme de commande de la transmission pour cet outil
CN103878752A (zh) * 2012-12-20 2014-06-25 罗伯特·博世有限公司 具有开关装置的工具机

Also Published As

Publication number Publication date
US4776406A (en) 1988-10-11
DE3540964A1 (de) 1987-05-21
DE3676961D1 (de) 1991-02-21
EP0224010B1 (fr) 1991-01-16

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