EP2517839A2 - Machine-outil et procédé de commande - Google Patents

Machine-outil et procédé de commande Download PDF

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Publication number
EP2517839A2
EP2517839A2 EP20120155287 EP12155287A EP2517839A2 EP 2517839 A2 EP2517839 A2 EP 2517839A2 EP 20120155287 EP20120155287 EP 20120155287 EP 12155287 A EP12155287 A EP 12155287A EP 2517839 A2 EP2517839 A2 EP 2517839A2
Authority
EP
European Patent Office
Prior art keywords
motor
rotation
tool
machine tool
duration
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
EP20120155287
Other languages
German (de)
English (en)
Other versions
EP2517839B1 (fr
EP2517839A3 (fr
Inventor
Thomas Müller
Germar Meiendres
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 EP2517839A2 publication Critical patent/EP2517839A2/fr
Publication of EP2517839A3 publication Critical patent/EP2517839A3/fr
Application granted granted Critical
Publication of EP2517839B1 publication Critical patent/EP2517839B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode
    • 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

Definitions

  • the machine tool control method of the present invention first rotates the motor for a duration of less than 100 ms in a first direction of rotation and then in a second direction of rotation opposite the first direction of rotation, in response to actuation of a system button to start a motor. With the motor rotating in the second direction of rotation, a tool is rotated by the machine tool in a direction of rotation corresponding to its function.
  • Fig. 1 schematically shows a hammer drill 1 as an example of a hand tool.
  • the hammer drill 1 has a tool holder 2 , in which a shank end 3 of a tool, for example one of the drill bit 4 , can be used.
  • a primary drive of the hammer drill 1 is a motor 5 , which drives a percussion 6 and a hollow output shaft 7 .
  • a user can guide the hammer drill 1 by means of a handle 8 and take means of a system key 9 the hammer drill 1 is in operation.
  • the hammer drill 1 rotates the drill bit 4 continuously about a working axis 10 and can beat the drill bit 4 in the direction of impact 11 along the working axis 10 in a substrate.
  • a selector switch may be provided for actuation by a user, which allows a choice between at least two of the following modes: turning and hitting, turning only and hitting only.
  • the powertrain between the engine 5 and the hollow output shaft 7 may include a transmission 18 to adjust a rotational speed of the engine 5 to a desired rotational speed of the tool 4 .
  • An overload clutch 19 may decouple the engine 5 from the output shaft 7 when a torque acting back from the tool 4 exceeds a tripping torque of the overload clutch 19 .
  • An exemplary overload clutch 19 may have a hollow bevel gear 20 which is mounted axially displaceably on the output shaft 7 and rotatably engages eg via balls 21 in the output shaft 7 .
  • An axially acting spring 22 presses the bevel gear 20 into engagement with an output pinion 23 of the transmission. If the retroactive torque exceeds a threshold value, the bevel gear 20 is deflected axially against the spring 22 and disengages from the output pinion 23 .
  • the system button 9 is coupled to the engine controller 24 . As soon as a user actuates the system button 9 , the motor control 24 is activated.
  • the engine controller 24 preferably first determines a rotational speed of the engine 25 . If the motor 25 is stopped or the speed falls below a threshold value, a start-up control is activated. In the startup control, the motor 5 is initially rotated in a direction of rotation reversed for the application of the hammer drill 1 .
  • Commercially available drills have a drilling action only in a given direction of rotation, namely in a clockwise direction on the drill bit. Furthermore, the conveying effect of a helix is designed for this direction of rotation.
  • the wrong direction of rotation of the motor 5 is characterized in that the drill 4 is rotated counterclockwise.
  • the motor controller 24 may rotate the motor 5 in the reverse direction with reduced power consumption.
  • a power consumption is preferably in the range of 10% to 50% of a nominal power consumption of the motor 5 .
  • the amplitude of the currents which are fed into the magnet coils is limited by the motor controller 24 .
  • the current limitation can be done, for example, in the time average by a pulse width modulation.
  • the torque output by the motor 5 is reduced in accordance with the reduced power consumption against a torque that the motor 5 can output at the maximum nominal power consumption. Subsequent to the end of the duration, the motor controller 24 controls the motor 5 according to the correct direction of rotation for the application of the hammer drill 1 .
  • the motor controller 24 increases the power consumption of the motor 5 to the nominal power consumption for the second direction of rotation in order to provide the user with a high torque for working with the machine tool.
  • the motor controller 24 stops driving the motor 5 .
  • the motor controller 24 interrupts a power supply to all solenoid coils, whereby the motor 5 expires.
  • Other variants see an active braking of the motor 5, for example by shorting the solenoid coils or by driving the magnetic coils, such that a counter-torque for braking the motor 5 is generated to a standstill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Control Of Electric Motors In General (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
EP20120155287 2011-04-27 2012-02-14 Machine-outil et procédé de commande Active EP2517839B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110017579 DE102011017579A1 (de) 2011-04-27 2011-04-27 Werkzeugmaschine und Steuerungsverfahren

Publications (3)

Publication Number Publication Date
EP2517839A2 true EP2517839A2 (fr) 2012-10-31
EP2517839A3 EP2517839A3 (fr) 2013-12-04
EP2517839B1 EP2517839B1 (fr) 2015-04-08

Family

ID=45592246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120155287 Active EP2517839B1 (fr) 2011-04-27 2012-02-14 Machine-outil et procédé de commande

Country Status (3)

Country Link
US (1) US9126321B2 (fr)
EP (1) EP2517839B1 (fr)
DE (1) DE102011017579A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2960021A1 (fr) * 2014-06-27 2015-12-30 HILTI Aktiengesellschaft Machine-outil portative et procédé de commande

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160207187A1 (en) * 2013-08-30 2016-07-21 Hitachi Koki Co., Ltd. Drilling Device
US10131042B2 (en) 2013-10-21 2018-11-20 Milwaukee Electric Tool Corporation Adapter for power tool devices
EP2871029B1 (fr) * 2013-11-09 2023-09-20 Illinois Tool Works Inc. Procede pour faire fonctionner un outil electrique portatif et outil electrique portatif
DE102013224759A1 (de) * 2013-12-03 2015-06-03 Robert Bosch Gmbh Werkzeugmaschinenvorrichtung
JP6757226B2 (ja) 2016-10-07 2020-09-16 株式会社マキタ 電動工具
JP6981744B2 (ja) 2016-10-07 2021-12-17 株式会社マキタ ハンマドリル

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6424799B1 (en) * 1993-07-06 2002-07-23 Black & Decker Inc. Electrical power tool having a motor control circuit for providing control over the torque output of the power tool
DE10219755A1 (de) * 2002-05-02 2003-11-13 Hilti Ag Überlastschutz für eine drehende Werkzeugmaschine
EP2390062B1 (fr) * 2002-09-13 2017-03-08 Black & Decker Inc. Outil rotatif
DE10360165A1 (de) * 2003-12-20 2005-09-29 C. & E. Fein Gmbh Elektrowerkzeug
US7410006B2 (en) * 2004-10-20 2008-08-12 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor
DE102005057268A1 (de) * 2005-12-01 2007-06-06 Robert Bosch Gmbh Handwerkzeugmaschinenumkehreinheit
CN201263135Y (zh) * 2006-03-03 2009-06-24 布莱克和戴克公司 在轻扭矩范围内具多速度传动和恒定速度的无缆电动工具
JP5041575B2 (ja) * 2006-03-07 2012-10-03 日立工機株式会社 打撃工具
JP5376392B2 (ja) * 2008-02-14 2013-12-25 日立工機株式会社 電動工具
CN101924506B (zh) * 2009-06-15 2013-01-30 南京德朔实业有限公司 一种控制割灌机锯片反转的方法
JP5408416B2 (ja) * 2009-07-03 2014-02-05 日立工機株式会社 電動工具
JP5440766B2 (ja) * 2009-07-29 2014-03-12 日立工機株式会社 インパクト工具
JP5479023B2 (ja) * 2009-10-20 2014-04-23 株式会社マキタ 充電式電動工具
CN102656657B (zh) * 2009-12-16 2015-04-15 胡斯华纳有限公司 具有启动指示装置的电动手持工具
DE102010041045A1 (de) * 2010-09-20 2012-03-22 Robert Bosch Gmbh Handwerkzeugmaschine, insbesondere Schlagbohrmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2960021A1 (fr) * 2014-06-27 2015-12-30 HILTI Aktiengesellschaft Machine-outil portative et procédé de commande
WO2015197753A1 (fr) * 2014-06-27 2015-12-30 Hilti Aktiengesellschaft Machine-outil à main et procédé de commande
US10751866B2 (en) 2014-06-27 2020-08-25 Hilti Akitengesellschaft Handheld power tool and control method
US11123854B2 (en) 2014-06-27 2021-09-21 Hilti Aktiengesellschaft Handheld power tool and control method

Also Published As

Publication number Publication date
EP2517839B1 (fr) 2015-04-08
US9126321B2 (en) 2015-09-08
EP2517839A3 (fr) 2013-12-04
DE102011017579A1 (de) 2012-10-31
US20120274254A1 (en) 2012-11-01

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