EP1008422A2 - Procédé et dispositif pour machines portatives pour éviter des accidents causés par un blocage d'outil - Google Patents

Procédé et dispositif pour machines portatives pour éviter des accidents causés par un blocage d'outil Download PDF

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Publication number
EP1008422A2
EP1008422A2 EP99811119A EP99811119A EP1008422A2 EP 1008422 A2 EP1008422 A2 EP 1008422A2 EP 99811119 A EP99811119 A EP 99811119A EP 99811119 A EP99811119 A EP 99811119A EP 1008422 A2 EP1008422 A2 EP 1008422A2
Authority
EP
European Patent Office
Prior art keywords
tool
acceleration
machine tool
acceleration sensors
blocking
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
EP99811119A
Other languages
German (de)
English (en)
Other versions
EP1008422A3 (fr
EP1008422B1 (fr
Inventor
Roland Schaer
Martin Mayr
Peter Hellmann
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP1008422A2 publication Critical patent/EP1008422A2/fr
Publication of EP1008422A3 publication Critical patent/EP1008422A3/fr
Application granted granted Critical
Publication of EP1008422B1 publication Critical patent/EP1008422B1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003—Crossed drill and motor spindles
    • 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
    • B25D2250/221—Sensors
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/13—Cutting by use of rotating axially moving tool with randomly-actuated stopping means
    • Y10T408/14—Responsive to condition of Tool or tool-drive

Definitions

  • the invention relates to a method and to the application of the Procedure based facility to prevent accidents by Tool blocking when working with hand-held machine tools rotating tool, especially with rotary hammers, with an interrupter device to interrupt the effect of the drive motor on the Tool depending on that supplied by a motion measuring device Rotational movement size detected operating state is equipped.
  • an acceleration threshold - a clutch triggers the drivetrain between the drive motor and the actual tool unit, in particular the drilling spindle, interrupts.
  • Difficulties with the two known, similar approaches arise from the fact that it is also in a desired operational use of the Machine, for example when working with a hammer drill in a concrete mass inhomogeneous composition for false tripping of the safety clutch is coming. This depends on the basic approach of an immediate Signal evaluation without a subsequent assessment together, i.e. a signal evaluation with necessarily a comparatively low security threshold without individual assessment of the respective accident.
  • the invention is therefore based on the object, hand-held machine tools to improve the type mentioned so that a Blocking of the tool by the reaction impulse or the reaction moment A measurement signal triggered by the motion sensor is then also an unambiguous one Provides information about a dangerous blocking case if the axis of rotation of the tool is distorted in the event of a malfunction, with the influencing variable simultaneously Acceleration to gravity on the measurement signal should be switched off.
  • the invention is in a method for preventing accidents Tool blocking when working with hand-held machine tools rotating tool, especially with rotary hammers, with an interrupter device to interrupt the effect of the drive motor on the Tool depending on that by a motion measuring device supplied inventory is equipped, characterized in that the movement of the machine tool at least two spatially apart and against the axis of rotation in normal operation of the Tool spaced points of the machine tool is measured, and that the measured values obtained before further processing and evaluation be subtracted from each other.
  • a facility to prevent rotational accidents due to Tool blocking in a hand-held machine tool with rotating Tool is characterized in that at least two acceleration sensors, preferably - in particular from Cost reasons - linear acceleration sensors as torsion sensors within of the housing of the machine tool on spatially from each other and opposite the tool axis preferably differently spaced locations are mounted and that the electronic evaluation unit has a subtraction level contains in which the signals delivered by the acceleration sensors before calculating one intended to trigger the interrupter device Signal are subtracted from each other.
  • the one of the several Acceleration sensors each delivered signals before calculating the expected and predeterminable angle of rotation of the machine tool from each other be subtracted.
  • FIG. 1A / B and FIG. 2 show the essentials in a basic illustration Components of a hand-guided in the context of the invention
  • Machine tool M its operating state by means of two acceleration sensors 1a or lb is monitored.
  • Fig. 1B is indicated by arrows indicated which acceleration 10 or deflection force in which deflection direction 11 on the machine tool in case of blocking of the tool 8 act.
  • the signals from the acceleration sensors 1a, 1b arrive an electronic evaluation unit 3, which is a microprocessor, one in discrete Circuit technology implemented microcomputer, a signal processor or the like can be.
  • the digitized signals are in this evaluation unit 3 of the acceleration sensors 1a, 1b are first subtracted from one another, such as explained and justified further below. Then the so obtained Result evaluated using a model or rule-based algorithm, which the operating state of the hand machine tool M when the Acceleration sensors 1a, 1b predicts.
  • the invention can be also be used advantageously for those applications in which there are no predictive ones Calculation of the expected twist angle of the hand machine tool M takes place, that is to say in the case of those safety devices that do so Assess acceleration signal generated by tool blocking immediately and when a certain level is exceeded, possibly after interference signal filtering, as well as one and / or two integration, directly to trigger the Use drive interrupter device.
  • the method according to the invention and the measuring system based thereon have an effect reliable for any rotation axis of the overall system as well as for if necessary, tilted or warped tool axis, as below under 3 is explained.
  • the movement measuring device has at least two Acceleration sensors 1a, 1b, whose measurement results according to the invention subtracted from further processing.
  • the disturbance Gravitational acceleration for every possible application position of the power tool eliminated.
  • the second sensor 1b in a axis 9 including the axis of rotation in normal operation Level lies.
  • the axis of rotation can be assumed to be two-dimensional Take any position and always delivers error-corrected signal, as derived from the following mathematical derivation reveals.
  • more than two sensors can also be provided be, then by averaging or a plausibility check the reliability of the signal obtained is increased. If two redundant sensor pairs are provided, the intervals for one Security check to be stretched in principle.
  • Equation (3) used in equation (1) in conjunction with equation (2) yields:
  • Equation (3 ') inserted in equation (1') in conjunction with equation (2 ') gives:
  • any measuring system is suitable within the scope of the invention
  • Acceleration sensors or accelerometers i.e. those that are based on piezoelectric, piezoresistive or inertial and / or integrated as Part of a microelectronic circuit are realized.
  • the electronic Evaluation unit can either be implemented analogously with the help of Operational amplifiers and corresponding filter circuits or digital using a microprocessor with associated processor interfaces (see DE 43 44 817 C2). It is also possible to use the evaluation unit to realize as fuzzy logic, which is detailed in DE 196 41 618 A1 is described.
  • any known measurement method for acceleration, angular velocity or Angle of rotation applicable is mainly from Cost reasons based on linear acceleration sensors, for example referred to piezoelectric measurement methods.
  • linear acceleration sensors for example referred to piezoelectric measurement methods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Drilling And Boring (AREA)
  • Portable Power Tools In General (AREA)
  • Manipulator (AREA)
  • Numerical Control (AREA)
EP99811119A 1998-12-10 1999-12-06 Procédé et dispositif pour machines portatives pour éviter des accidents causés par un blocage d'outil Expired - Lifetime EP1008422B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19857061 1998-12-10
DE19857061A DE19857061C2 (de) 1998-12-10 1998-12-10 Verfahren und Einrichtung zur Vermeidung von Unfällen bei handgeführten Werkzeugmaschinen durch Werkzeugblockieren

Publications (3)

Publication Number Publication Date
EP1008422A2 true EP1008422A2 (fr) 2000-06-14
EP1008422A3 EP1008422A3 (fr) 2001-09-19
EP1008422B1 EP1008422B1 (fr) 2007-02-14

Family

ID=7890654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99811119A Expired - Lifetime EP1008422B1 (fr) 1998-12-10 1999-12-06 Procédé et dispositif pour machines portatives pour éviter des accidents causés par un blocage d'outil

Country Status (5)

Country Link
US (1) US6111515A (fr)
EP (1) EP1008422B1 (fr)
JP (1) JP4486728B2 (fr)
CN (1) CN1160526C (fr)
DE (2) DE19857061C2 (fr)

Cited By (12)

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EP1227561A2 (fr) 2001-01-24 2002-07-31 HILTI Aktiengesellschaft Outil electrique rotatif avec système de sécurité pour démarrage
DE10309414A1 (de) * 2003-03-05 2004-09-23 Robert Bosch Gmbh Sensoreinrichtung und zugehöriges Verfahren
EP2581168A1 (fr) * 2011-10-13 2013-04-17 Oy Kwh Mirka Ab Machine portable
EP1714723A3 (fr) * 2005-04-19 2014-03-19 Black & Decker, Inc. Embrayage électronique pour mandrin porte-outil avec entraînement auxiliaire et verrouillage de la broche
USD703017S1 (en) 2011-01-07 2014-04-22 Black & Decker Inc. Screwdriver
US9199362B2 (en) 2010-01-07 2015-12-01 Black & Decker Inc. Power tool having rotary input control
EP2656977A3 (fr) * 2012-04-26 2015-12-23 Robert Bosch Gmbh Outil électrique et son procédé de fonctionnement
US9266178B2 (en) 2010-01-07 2016-02-23 Black & Decker Inc. Power tool having rotary input control
US9475180B2 (en) 2010-01-07 2016-10-25 Black & Decker Inc. Power tool having rotary input control
EP2288463B1 (fr) * 2008-05-14 2016-11-30 Robert Bosch GmbH Procédé pour faire fonctionner une scie sauteuse.
EP3610990A1 (fr) 2018-08-14 2020-02-19 Hilti Aktiengesellschaft Procédé de commande pour une machine-outil portative, machine-outil portative et système doté d'une machine-outil portative et d'un support
US10589413B2 (en) 2016-06-20 2020-03-17 Black & Decker Inc. Power tool with anti-kickback control system

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US7552781B2 (en) 2004-10-20 2009-06-30 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor
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JP5448568B2 (ja) * 2009-05-21 2014-03-19 株式会社やまびこ 安全装置付き作業機
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DE102014202585A1 (de) * 2013-04-29 2014-10-30 Robert Bosch Gmbh Handwerkzeugbedieneinheit
DE102013212626B4 (de) * 2013-06-28 2024-08-08 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102014207434A1 (de) * 2014-04-17 2015-10-22 Robert Bosch Gmbh Verfahren zum Betreiben einer Handwerkzeugmaschine, Handwerkzeugmaschine
CN105082261A (zh) * 2014-05-13 2015-11-25 苏州宝时得电动工具有限公司 链锯及其控制方法
EP3023200A1 (fr) * 2014-11-20 2016-05-25 HILTI Aktiengesellschaft Procédé de commande d'une perceuse
EP3023202A1 (fr) * 2014-11-20 2016-05-25 HILTI Aktiengesellschaft Procédé de sécurité et machine-outil manuelle
EP3023203A1 (fr) * 2014-11-20 2016-05-25 HILTI Aktiengesellschaft Procédé de commande pour une machine-outils manuelle
DE102015205172A1 (de) * 2015-03-23 2016-09-29 Robert Bosch Gmbh Werkzeugmaschine, insbesondere Handwerkzeugmaschine, mit einer motorischen Antriebseinheit und mit zumindest einer Sensorvorrichtung
JP2017001115A (ja) * 2015-06-05 2017-01-05 株式会社マキタ 作業工具
KR101799432B1 (ko) * 2015-09-22 2017-11-21 계양전기 주식회사 전동 공구
EP3199303A1 (fr) * 2016-01-29 2017-08-02 HILTI Aktiengesellschaft Machine-outil portative
JP6757226B2 (ja) * 2016-10-07 2020-09-16 株式会社マキタ 電動工具
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Cited By (19)

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Publication number Priority date Publication date Assignee Title
EP1227561A2 (fr) 2001-01-24 2002-07-31 HILTI Aktiengesellschaft Outil electrique rotatif avec système de sécurité pour démarrage
EP1227561A3 (fr) * 2001-01-24 2009-07-22 HILTI Aktiengesellschaft Outil electrique rotatif avec système de sécurité pour démarrage
DE10309414A1 (de) * 2003-03-05 2004-09-23 Robert Bosch Gmbh Sensoreinrichtung und zugehöriges Verfahren
DE10309414B4 (de) * 2003-03-05 2009-01-08 Robert Bosch Gmbh Sensoreinrichtung und zugehöriges Verfahren für eine Handwerkzeugmaschine
EP1714723A3 (fr) * 2005-04-19 2014-03-19 Black & Decker, Inc. Embrayage électronique pour mandrin porte-outil avec entraînement auxiliaire et verrouillage de la broche
EP2288463B1 (fr) * 2008-05-14 2016-11-30 Robert Bosch GmbH Procédé pour faire fonctionner une scie sauteuse.
US9321155B2 (en) 2010-01-07 2016-04-26 Black & Decker Inc. Power tool having switch and rotary input control
US9199362B2 (en) 2010-01-07 2015-12-01 Black & Decker Inc. Power tool having rotary input control
US9211636B2 (en) 2010-01-07 2015-12-15 Black & Decker Inc. Power tool having rotary input control
US9266178B2 (en) 2010-01-07 2016-02-23 Black & Decker Inc. Power tool having rotary input control
US9321156B2 (en) 2010-01-07 2016-04-26 Black & Decker Inc. Power tool having rotary input control
US9475180B2 (en) 2010-01-07 2016-10-25 Black & Decker Inc. Power tool having rotary input control
US10160049B2 (en) 2010-01-07 2018-12-25 Black & Decker Inc. Power tool having rotary input control
USD703017S1 (en) 2011-01-07 2014-04-22 Black & Decker Inc. Screwdriver
EP2581168A1 (fr) * 2011-10-13 2013-04-17 Oy Kwh Mirka Ab Machine portable
EP2656977A3 (fr) * 2012-04-26 2015-12-23 Robert Bosch Gmbh Outil électrique et son procédé de fonctionnement
US10589413B2 (en) 2016-06-20 2020-03-17 Black & Decker Inc. Power tool with anti-kickback control system
US11192232B2 (en) 2016-06-20 2021-12-07 Black & Decker Inc. Power tool with anti-kickback control system
EP3610990A1 (fr) 2018-08-14 2020-02-19 Hilti Aktiengesellschaft Procédé de commande pour une machine-outil portative, machine-outil portative et système doté d'une machine-outil portative et d'un support

Also Published As

Publication number Publication date
JP4486728B2 (ja) 2010-06-23
DE19857061C2 (de) 2000-11-02
EP1008422A3 (fr) 2001-09-19
EP1008422B1 (fr) 2007-02-14
JP2000263304A (ja) 2000-09-26
DE59914191D1 (de) 2007-03-29
US6111515A (en) 2000-08-29
CN1160526C (zh) 2004-08-04
DE19857061A1 (de) 2000-06-15
CN1256383A (zh) 2000-06-14

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