EP1375077A2 - Mécanisme de percussion à ressort pneumatique - Google Patents

Mécanisme de percussion à ressort pneumatique Download PDF

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Publication number
EP1375077A2
EP1375077A2 EP03405286A EP03405286A EP1375077A2 EP 1375077 A2 EP1375077 A2 EP 1375077A2 EP 03405286 A EP03405286 A EP 03405286A EP 03405286 A EP03405286 A EP 03405286A EP 1375077 A2 EP1375077 A2 EP 1375077A2
Authority
EP
European Patent Office
Prior art keywords
sensor
pneumatic
piston
mechanism according
flying
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
EP03405286A
Other languages
German (de)
English (en)
Other versions
EP1375077B1 (fr
EP1375077A3 (fr
Inventor
Hanspeter Schad
Hans Böni
Alexander Hoop
Albert Binder
Cristoph Würsch
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 EP1375077A2 publication Critical patent/EP1375077A2/fr
Publication of EP1375077A3 publication Critical patent/EP1375077A3/fr
Application granted granted Critical
Publication of EP1375077B1 publication Critical patent/EP1375077B1/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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0019—Guide-sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons
    • 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
    • B25D2250/141—Magnetic parts used in percussive tools
    • 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 invention refers to a pneumatic striking mechanism with a flying piston, in particular for an at least partially hitting machine tool, such as a drill Chisel.
  • a conventional at least partially hitting machine tool with a pneumatic impact mechanism is in a partially rotatable guide tube over a Gas spring on, on an anvil and on the front end of a tool, beating Air piston reciprocable.
  • the flying mass is subject to complex oscillation kinematics, their steady state of vibration is characteristic of the boundary conditions depends.
  • the oscillation kinematics of the flying piston together with the other moving parts optimized by simulation calculations and practical experiments and realized constructively.
  • a piezoelectric sensor detects the impacts of the percussion mechanism the tool and in combination with a transmitter allows a regulated Adaptation of impact mechanism behavior to the material to be processed. Such Impact pulse measurement does not allow a comprehensive statement about the Vibration state of the flying piston.
  • the non-contact magnetic field-sensitive sensor which optionally has a permanent magnet for generating the magnetic flux, is the Movement of an axially reciprocating, impacted fly piston measurable.
  • the regions of different magnetic permeability in the flying mass produce at the output of the magnetic field sensitive sensor almost a sinusoidal Signal whose amplitude depends on the distance of the sensor to the flying mass.
  • the magnetic-field-sensitive sensor as, further advantageous differentially switched, solid-state magnetic field sensor such as (Hall sensor, AMR (anisotropic magneto resistance) sensor, GMR (giant magneto resistance) sensor, MR (magnetor resistance) Sensor, Ml (magneto-impedance) sensor or as inductive sensor including coil and Flow guidance executed, which are available as standard components.
  • differential Sensors are less sensitive to the radial play of the flying piston. They only measure the Flow difference between two adjacent positions.
  • the geometry of these areas is different from the air gap and the distance switched magnetic field-sensitive sensors dependent, wherein advantageously the axial Structure size of the areas at least the air gap (distance sensor leading edge to Flying piston) corresponds. Slightly larger structure widths are advantageous to the To increase signal amplitudes.
  • For the measurement of the velocity course of the Air piston are as many axially spaced areas on the piston advantageous.
  • the regions of different magnetic permeability are more than one formed axially spaced, air-filled radial grooves, which are technologically simple can be produced.
  • the senor is radially outside of an optionally rotatable guide tube for the Air piston arranged non-contact, causing a measurement through the guide tube through is possible.
  • the guide tube made of non-ferromagnetic material, whereby the Guide tube has a smaller influence on the flying piston radially outside enforcing measuring magnetic field exerts.
  • the arithmetic unit selectively with respect to the kinematics of the flying piston activatable classification means, such as frequency filters, resulting in different Beat states are detectable and can be assigned, for example when hitting a tool on a structural steel embedded in concrete.
  • the arithmetic unit controls the different, depending on Beat states of the flying piston, activated classification means corresponding Control means, for example, to reduce the engine speed and / or the speed of the Tool and / or the interruption or the regulation of the percussion drive and thus the impact performance.
  • the arithmetic unit with a setpoint memory for an optimal kinematics of the flying mass and optionally further boundary conditions such as impact energy, impact number, Speed etc. connected for different materials to be machined which continues is advantageously organized as a multi-dimensional array, whereby the machine tool automatically adaptive to optimal kinematics of the flying piston and thus to optimum Abbau amalgam einregelbar is.
  • a Leertschposition of the flying piston from the Sensor signal determined and via appropriate control means, such as the electric motor Schlagtechnik deactivatable, which provides additional catch for the flying piston, which place require and thereby extend the machine tool, can be omitted.
  • An impact temperature from the sensor signal is advantageous via the arithmetic unit ascertainable and via appropriate control means such as the electric motor the percussion deactivatable, whereby the life is increased.
  • the sensor 3 is considered to be an internally differentially switched, solid-state Magnetic field sensor is formed and generates a measuring magnetic field H whose magnetic flux in penetrates the radial edge region of the flying piston 2.
  • the radial grooves of the flying piston 2 are 0.8 mm deep and 3.2 mm wide and form a remaining 1.6 mm wide axial Gutter 7 off.
  • the sensor 3 is radially outside a rotatable guide tube. 5 made of non-ferromagnetic chromium steel tapered radially to 0.2 mm in one outer, axial measuring point area X contact-free fixed.
  • the sensor 3 is with a Computing unit 6 connected in the form of a microcontroller, which further with the not shown engine electronics of the electric motor, also not shown is connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Actuator (AREA)
EP03405286A 2002-05-03 2003-04-23 Mécanisme de percussion à ressort pneumatique Expired - Lifetime EP1375077B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10219950 2002-05-03
DE10219950A DE10219950C1 (de) 2002-05-03 2002-05-03 Pneumatisches Schlagwerk mit magnetfeldempfindlichen Sensor

Publications (3)

Publication Number Publication Date
EP1375077A2 true EP1375077A2 (fr) 2004-01-02
EP1375077A3 EP1375077A3 (fr) 2004-02-04
EP1375077B1 EP1375077B1 (fr) 2005-11-16

Family

ID=28685335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03405286A Expired - Lifetime EP1375077B1 (fr) 2002-05-03 2003-04-23 Mécanisme de percussion à ressort pneumatique

Country Status (4)

Country Link
US (1) US6799644B2 (fr)
EP (1) EP1375077B1 (fr)
JP (1) JP2003326475A (fr)
DE (2) DE10219950C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1607186A1 (fr) * 2004-06-18 2005-12-21 HILTI Aktiengesellschaft Perceuse à percussion / marteau piqueur électro-pneumatique à énergie d'impact modifiable
WO2013174594A1 (fr) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Unité de percussion

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE527067C2 (sv) * 2003-12-01 2005-12-13 Atlas Copco Tools Ab Impulsmutterdragare med vinkelavkännande organ
US7273998B2 (en) * 2004-09-15 2007-09-25 General Electric Company System and method for monitoring laser shock processing
EP1674205B1 (fr) * 2004-12-23 2014-03-19 Black & Decker Inc. Mécanisme d'entraînement pour outil motorisé
DE102005019095A1 (de) * 2005-04-25 2006-10-26 Ott Messtechnik Gmbh & Co. Kg Längenmessgerät
DE102007000488A1 (de) * 2007-09-12 2009-03-19 Hilti Aktiengesellschaft Handwerkzeugmaschine mit Luftfederschlagswerk, Linearmotor und Steuerverfahren
DE102007060911A1 (de) * 2007-12-14 2009-06-18 DYNATEC Gesellschaft für CAE und Dynamik mbH Bearbeitungswerkzeug
DE102007060909B8 (de) * 2007-12-14 2013-05-02 DYNATEC GmbH Fluidbetriebenes Bearbeitungswerkzeug
CA2715995C (fr) * 2008-03-31 2016-09-27 Atlas Copco Construction Tools Ab Outil de percussion
WO2009148376A1 (fr) * 2008-06-05 2009-12-10 Atlas Copco Rock Drills Ab Dispositif et procédé permettant la détection d’un paramètre associé à une position d’un élément mobile dans un perforateur mécanique
EP2338032B1 (fr) * 2008-06-05 2016-04-06 Salunda Limited Détecteur de position
ATE527083T1 (de) * 2009-01-30 2011-10-15 Hilti Ag Pneumatisches schlagwerk
DE102009026542A1 (de) * 2009-05-28 2010-12-09 Hilti Aktiengesellschaft Werkzeugmaschine
GB0912283D0 (en) 2009-07-15 2009-08-26 Black & Decker Inc Motor driven hammer having means for controlling the power of impact
JP5374331B2 (ja) * 2009-11-25 2013-12-25 パナソニック株式会社 回転工具
WO2013174641A1 (fr) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Unité de percussion
DE102012208913A1 (de) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Schlagwerkeinheit
DE102012208855A1 (de) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Handwerkzeugmaschine
US9416593B2 (en) 2012-12-28 2016-08-16 Smith International, Inc. Piston strike face and bit interface for percussion hammer drill
EP2811110B1 (fr) * 2013-06-07 2017-09-20 Sandvik Mining and Construction Oy Dispositif et procédé dans un système d'abattage de roche
US10190604B2 (en) 2015-10-22 2019-01-29 Caterpillar Inc. Piston and magnetic bearing for hydraulic hammer
US11014224B2 (en) * 2016-01-05 2021-05-25 Milwaukee Electric Tool Corporation Vibration reduction system and method for power tools
JP6706681B2 (ja) 2016-02-25 2020-06-10 ミルウォーキー エレクトリック ツール コーポレイション 出力位置センサを含むパワーツール
EP3266975B1 (fr) * 2016-07-07 2019-01-30 Sandvik Mining and Construction Oy Composant pour système d'abattage de roche
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
CN214723936U (zh) 2018-01-26 2021-11-16 米沃奇电动工具公司 冲击工具
EP3608063A1 (fr) * 2018-08-07 2020-02-12 Hilti Aktiengesellschaft Machine-outil portative et procédé de fonctionnement d'une machine-outil portative
US11951602B2 (en) * 2020-04-02 2024-04-09 Milwaukee Electric Tool Corporation Power tool

Citations (2)

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US5806609A (en) * 1995-03-24 1998-09-15 Hilti Aktiengesellschaft Manually operable tool for drilling and/or removing material in brittle and/or low ductile material
US6253460B1 (en) * 1999-06-10 2001-07-03 Geoffrey W. Schmitz Apparatus for position measurement and a system and a method for using the same

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US3464503A (en) * 1968-06-25 1969-09-02 Black & Decker Mfg Co Measuring device for impact tool
US4109475A (en) * 1974-12-10 1978-08-29 Van Kooten B.V. Pile-driving ram and method of controlling the same
DE3210716A1 (de) * 1981-03-24 1982-11-11 Toshiba Kikai K.K., Tokyo Metallmessstab und verfahren zu seiner herstellung
DE3137951C2 (de) * 1981-09-24 1985-10-17 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Hydraulisches Schubkolbengetriebe, insbesondere zur Verwendung als Rück- und Schreitzylinder in untertägigen Gewinnungsbetrieben, mit an der Kolbenstange angeordneten Permanentmagneten
US4510371A (en) * 1982-03-18 1985-04-09 Toshiba Kikai Kabushiki Kaisha Metallic scales and method of manufacturing the same
DE4211616A1 (de) * 1992-04-07 1993-10-14 Bosch Gmbh Robert Meßvorrichtung zur Bestimmung eines Drehwinkels
DE19753776A1 (de) * 1997-12-04 1999-06-10 Bosch Gmbh Robert Meßvorrichtung zur berührungslosen Erfassung eines Drehwinkels
DE19852915A1 (de) * 1998-11-17 2000-05-31 Bosch Gmbh Robert Meßvorrichtung zur berührungslosen Erfassung eines Drehwinkels
DE19956313A1 (de) * 1999-11-12 2001-05-23 Atecs Mannesmann Ag Magnetfeldsensor zur Ermittlung der Position eines beweglichen Objekts
US6411081B1 (en) * 2000-02-10 2002-06-25 Siemens Ag Linear position sensor using magnetic fields
US6367337B1 (en) * 2000-05-03 2002-04-09 Cts Corporation Non-contacting sensor for measuring relative displacement between two rotating shafts
JP2002156245A (ja) * 2000-11-20 2002-05-31 Aisin Seiki Co Ltd 非接触式変位センサ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5806609A (en) * 1995-03-24 1998-09-15 Hilti Aktiengesellschaft Manually operable tool for drilling and/or removing material in brittle and/or low ductile material
US6253460B1 (en) * 1999-06-10 2001-07-03 Geoffrey W. Schmitz Apparatus for position measurement and a system and a method for using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1607186A1 (fr) * 2004-06-18 2005-12-21 HILTI Aktiengesellschaft Perceuse à percussion / marteau piqueur électro-pneumatique à énergie d'impact modifiable
WO2013174594A1 (fr) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Unité de percussion
CN104334316A (zh) * 2012-05-25 2015-02-04 罗伯特·博世有限公司 冲击机构单元
US10350742B2 (en) 2012-05-25 2019-07-16 Robert Bosch Gmbh Percussion unit

Also Published As

Publication number Publication date
US6799644B2 (en) 2004-10-05
US20030205393A1 (en) 2003-11-06
DE10219950C1 (de) 2003-10-30
EP1375077B1 (fr) 2005-11-16
EP1375077A3 (fr) 2004-02-04
JP2003326475A (ja) 2003-11-18
DE50301651D1 (de) 2005-12-22

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