EP2189249A1 - Dispositif de machine-outil et machine-outil - Google Patents

Dispositif de machine-outil et machine-outil Download PDF

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Publication number
EP2189249A1
EP2189249A1 EP09171301A EP09171301A EP2189249A1 EP 2189249 A1 EP2189249 A1 EP 2189249A1 EP 09171301 A EP09171301 A EP 09171301A EP 09171301 A EP09171301 A EP 09171301A EP 2189249 A1 EP2189249 A1 EP 2189249A1
Authority
EP
European Patent Office
Prior art keywords
control
impact
machine tool
parameter
hand
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
EP09171301A
Other languages
German (de)
English (en)
Other versions
EP2189249B1 (fr
Inventor
Rolf Kaack
Maik Rabe
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 EP2189249A1 publication Critical patent/EP2189249A1/fr
Application granted granted Critical
Publication of EP2189249B1 publication Critical patent/EP2189249B1/fr
Active 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
    • B25D17/24—Damping the reaction force
    • 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
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • 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
    • B25D2216/0084—Mode-changing mechanisms
    • 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
    • B25D2250/195—Regulation means
    • 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 is based on a handheld power tool device according to the preamble of claim 1.
  • the invention is based on a handheld power tool device having at least one impact device.
  • the impact device has a control device which is provided to control at least one impact characteristic.
  • An "impact parameter" is to be understood as meaning, in particular, an effect of an operation, for example a vibration, an acceleration, a pressure, a striking effect and / or another effect appearing appropriate to a person skilled in the art, the control apparatus being provided in particular for the impact characteristic by means of a frequency change of the impact device and / or a speed change of an engine to control.
  • the motor may be formed by a pneumatic motor or particularly advantageous by an electric motor.
  • “provided” is to be understood in particular specially equipped, designed and / or programmed. Due to the inventive design of the power tool device can by means of the scheme the at least one impact characteristic, the impact device are largely optimized regardless of the properties of a workpiece.
  • control device has a computing unit which is at least provided to determine at least one feedback variable of the impact parameter depending on at least one parameter.
  • a "computing unit” is to be understood in particular as meaning a microcontroller having a processor, a memory unit and an operating program stored in the memory unit and / or calculation routines and / or control routines stored in the memory unit.
  • a "parameter” is to be understood as meaning, in particular, a value and / or a value course which is dependent on internal and / or external influences and which is at least partially descriptive of the at least one impact parameter. Internal influences are in particular a temperature and / or a lubrication of parts of a hand tool.
  • a feedback variable is to be understood as meaning, in particular, calculated information about the impact parameter, which can be used to control the impact parameter.
  • the control can include various parameters in the control and be designed to be particularly flexible.
  • control device has a control routine which is intended to control at least the impact characteristic with respect to at least one operating point.
  • a "control routine” is to be understood, in particular, as a routine which carries out the calculations necessary for control during operation and outputs results.
  • the control routine runs advantageously on a computing unit.
  • An "operating point” is to be understood, in particular, as an operating state in which at least one impact parameter in an operation is regulated to a predetermined value curve.
  • the operating point preferably has a desired course and / or a desired value of the impact characteristic.
  • the regulating device has at least one measuring device, as a result of which the regulating device and the measuring device can advantageously be matched to one another.
  • the measuring device is in particular provided to detect at least one parameter, as a function of which the feedback variable of the impact characteristic is determined.
  • the measuring device has at least one acceleration sensor which is provided to detect at least one acceleration parameter of a handheld power tool.
  • An "acceleration parameter” should in particular be understood as meaning a measured acceleration profile in at least one axis. Preferably, this axis is parallel to a main working direction.
  • the acceleration parameter forms a particularly accurate parameter for a vibration of the handheld power tool.
  • the measuring device has at least one pressure sensor which is provided to detect a pressure parameter in a compression chamber of the impact device at least temporarily.
  • a "pressure parameter” should be understood in particular to mean a measured relative pressure curve in the compression chamber.
  • the pressure parameter is used in particular to determine an effect of the energy reflected from a workpiece particularly accurately.
  • the term “at least temporarily” should be understood in particular to mean that a discontinuous detection of the pressure in the compression chamber can take place.
  • at least one detection of the pressure parameter occurs at least in a period of time when the effect of the energy that reflects the workpiece occurs in the compression chamber.
  • control device has at least two control modes that are provided to provide at least one operating point in each case.
  • a "control mode” is to be understood, in particular, as meaning a specific operating mode which aims at optimizing the control to at least one specific effect.
  • the operating point is determined by a calculation routine based on the control mode.
  • control device is provided in one of the control modes to regulate to a vibration-optimized operating point.
  • vibration-optimized is to be understood in particular as an objectively and / or subjectively low-vibration hand-held power tool during operation.
  • a regulation to a low-energy vibration and / or to a vibration perceived by an operator as less uncomfortable can be optimized. This can allow the operator to work in a particularly comfortable manner.
  • control device is provided in one of the control modes to regulate a stroke-optimized operating point.
  • impact-optimized should in particular be understood to mean that the hand-held power tool achieves the greatest possible performance in an enterprise. By means of the impact optimized working point a particularly effective work can be achieved.
  • a selection element which provides the operator with a choice of the control mode, whereby the operator can easily switch between different control modes.
  • the invention proceeds from a handheld power tool with a handheld power tool device, wherein all, to those skilled appear reasonable hand tooling with a percussion device, such as impact drills, rotary hammers, impact drills, impact wrench, impact wrench, impact hammers, demolition hammers and / or multi-function tools, for operation with the power tool device would be conceivable, whereby a particularly effective and / or convenient to use hand tool can be provided.
  • a percussion device such as impact drills, rotary hammers, impact drills, impact wrench, impact wrench, impact hammers, demolition hammers and / or multi-function tools
  • FIG. 1 and FIG. 2 each show an embodiment of a hand tool 24a, 24b in a schematic representation with a hand tool device 10a, 10b according to the invention.
  • a housing 32a, 32b of the power tool 24a, 24b shown broken so that the power tool device 10a, 10b in the interior of the power tool 24a, 24b is visible.
  • FIG. 1 shows a handheld power tool device 10a with a percussion device 12a.
  • the impact device 12a has an electric motor 34a, a crank mechanism 36a, a conversion element 38a, a drive piston 40a, a hammer tube 42a, a compression chamber 28a, a beater 44a, and a striker 46a.
  • the electric motor 34a is rotatably connected to the crank mechanism 36a.
  • the crank mechanism 36a converts a rotational movement of a shaft 50a of the electric motor 34a by means of the conversion element 38a into an oscillating linear movement 52a of the drive piston 40a along a main working direction 54a of the handheld power tool 24a.
  • the drive piston 40a is guided by the hammer tube 42a.
  • the hammer tube 42a surrounds the drive piston 40a in a circle.
  • the driving piston 40a drives the racket 44a by means of a pressure of a gas, by means of air, in the compression chamber 28a.
  • the beater 44a is disposed in the main working direction 54a in the hammer pipe 42a as viewed from the driving piston 40a and is also guided by the hammer pipe 42a.
  • the racket 44a can, driven by the pressure, be moved between the drive piston 40a and the firing pin 46a. When the racket 44a hits the striker 46a, the racket 44a transmits a pulse to the striker 46a.
  • the striker 46a is coupled to a tool 56a which is releasably disposed in a tool chuck 48a.
  • the tool 56a is formed in this embodiment as a spiral drill bit. Other tools 56a that would appear meaningful to a person skilled in the art would also be possible.
  • the electric motor 34a rotates the tool 56a about a rotation axis 60a by means of a shaft 58a.
  • the rotation axis 60a is parallel to the main working direction 54a.
  • Other configurations of the percussion mechanism that seem sensible to a person skilled in the art, in particular for a percussion hammer, are possible.
  • the impact device 12a has a control device 14a, which is intended to control two impact characteristics.
  • the control device 14a is arranged, apart from two sensors 22a, 26a and a selector element 30a, together with power electronics 62a, which supply the electric motor 34a, on a circuit board 64a in a main handle-forming shaft 66a of the L-shaped housing 32a.
  • the control device 14a has a computing unit 16a, which is designed as a microcontroller.
  • the arithmetic unit 16a executes three routines during operation.
  • a first calculation routine 68a is provided to determine a feedback variable of the impact characteristics depending on a parameter.
  • a pressure waveform in the compression chamber 28a and an acceleration course of the housing 32a serve as parameters.
  • a second calculation routine 70a determines an operating point that serves as a control reference.
  • a control routine 18a is provided to control the impact characteristic to be controlled with respect to the operating point.
  • the control routine 18a has calculation methods not shown in more detail, e.g. for a PID controller and a comparison method.
  • the regulating device 14a has a measuring device 20a which is provided to detect two parameters.
  • the measuring device 20a has an acceleration sensor 22a.
  • the acceleration sensor 22a is disposed on the board 64a coupled to the housing 32a.
  • the acceleration parameter contains information about a Vibration of the housing 32 a and information about an energy that reflects a workpiece not shown in detail. The vibrations are measured by the position of the acceleration sensor 22a close to an operator, not shown.
  • the measuring device 20a For detecting the pressure parameter in the compression chamber 28a of the impact device 12a, the measuring device 20a has a pressure sensor 26a.
  • the pressure sensor 26a is arranged in an end face 72a of the drive piston 40a pointing in the main working direction 54a and is connected to the circuit board 64a by means of an information carrier, in this case an electrical line 74a. At this point, the pressure sensor 26a can permanently detect the pressure curve in the compression chamber 28a.
  • the pressure parameter includes information about energy that reflects a workpiece and information about the vibration of the housing 32a.
  • control device 14a has two control modes. Depending on the control mode, different operating points are used for the control. The different operating points are optimized for different effects. One of the control modes is intended to control to a vibration optimized operating point. The other control mode is intended to control an impact optimized operating point.
  • the handheld power tool device 10a has the selection element 30a, which provides the operator with a choice of the control modes.
  • the selection element 30a is designed as a switch and arranged on a lower side 76a of the housing 32a.
  • FIG. 2 a further embodiment of the invention is shown.
  • the letter a in the reference numerals of the embodiment in the FIG. 1 by the letter b in the reference numerals of the embodiment in the FIG. 2 replaced.
  • the following description is essentially limited to the differences from the embodiment in FIG. 1 , wherein with respect to the same components, features and functions on the description of the embodiment in the FIG. 1 can be referenced.
  • FIG. 12 shows a handheld power tool apparatus 10b in which a pressure sensor 26b, unlike the first embodiment, is disposed on a side 78b of a hammer tube 42b.
  • the pressure sensor 26b is connected to a compression chamber 28b of the hammer tube 42b by means of a pressure passage 82b, the pressure passage 82b being disposed in a guide portion of the hammer tube 42b in which a beater 44b of a beater 12b is guided, so that the beater 44b is at least at an operating point closes the pressure channel 82b and thus protects the pressure sensor 26b.
  • the pressure channel 82b is arranged so far away from a drive piston 40b that the pressure sensor 26b is protected from the maximum of the pressure curve during a maximum of the pressure curve by a racket 44b.
  • the maximum of the pressure curve occurs when a distance 80b between the beater 44b and the drive piston 40b is minimal.
  • the beater 44b closes an opening 82b in the hammer tube 42b to the pressure sensor 26b.
  • the drive piston 40b can also close the pressure channel 82b.
EP09171301.6A 2008-11-25 2009-09-25 Dispositif de machine-outil et machine-outil Active EP2189249B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008044044A DE102008044044A1 (de) 2008-11-25 2008-11-25 Handwerkzeugmaschinenvorrichtung

Publications (2)

Publication Number Publication Date
EP2189249A1 true EP2189249A1 (fr) 2010-05-26
EP2189249B1 EP2189249B1 (fr) 2018-01-17

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ID=41278131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09171301.6A Active EP2189249B1 (fr) 2008-11-25 2009-09-25 Dispositif de machine-outil et machine-outil

Country Status (3)

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EP (1) EP2189249B1 (fr)
CN (1) CN101733735B (fr)
DE (1) DE102008044044A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103372850A (zh) * 2012-04-19 2013-10-30 喜利得股份公司 手持工具设备
WO2013174641A1 (fr) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Unité de percussion
CN104428106A (zh) * 2012-05-25 2015-03-18 罗伯特·博世有限公司 冲击机构单元
EP3028821A1 (fr) * 2014-12-03 2016-06-08 HILTI Aktiengesellschaft Procédé de contrôle pour une machine-outils portative
EP3028820A1 (fr) * 2014-12-03 2016-06-08 HILTI Aktiengesellschaft Machine-outils portative et procédé de commande associé
US11241778B2 (en) * 2013-06-28 2022-02-08 Robert Bosch Gmbh Hand-held power tool device
DE102013208902B4 (de) 2013-05-14 2023-12-14 Robert Bosch Gmbh Handwerkzeugvorrichtung

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103573183A (zh) * 2012-08-06 2014-02-12 周飞 一种改进的气动冲击钻
DE102014207434A1 (de) * 2014-04-17 2015-10-22 Robert Bosch Gmbh Verfahren zum Betreiben einer Handwerkzeugmaschine, Handwerkzeugmaschine
DE102014212253A1 (de) * 2014-06-26 2015-12-31 Robert Bosch Gmbh Schlagwerkvorrichtung
DE102015205172A1 (de) * 2015-03-23 2016-09-29 Robert Bosch Gmbh Werkzeugmaschine, insbesondere Handwerkzeugmaschine, mit einer motorischen Antriebseinheit und mit zumindest einer Sensorvorrichtung
EP3290721A1 (fr) 2016-08-30 2018-03-07 HILTI Aktiengesellschaft Capteur de distance sur un bec d'ancre
CN108547471A (zh) * 2018-04-20 2018-09-18 王云龙 一种安全消防组件
CN108637322A (zh) * 2018-04-20 2018-10-12 李晓梅 一种数控加工设备
CN108543979A (zh) * 2018-04-20 2018-09-18 郑牡兰 一种先进的模具设计和制造技术设备
CN110774236B (zh) * 2019-11-20 2021-07-27 山东奥德燃气设备制造有限公司 一种压力可调的气动冲击工具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025830A (en) * 1978-07-21 1980-01-30 Hilti Ag Hammer drill
EP1452278A1 (fr) * 2003-03-01 2004-09-01 HILTI Aktiengesellschaft Méthode de contrôle d'un marteau électrique à percussion
EP1466702A1 (fr) * 2003-04-11 2004-10-13 HILTI Aktiengesellschaft Contrôle d'un outil électrique
GB2411375A (en) * 2004-02-26 2005-08-31 South West Highways Ltd Vibration reduction in pneumatic tools.
EP2036680A2 (fr) * 2007-09-12 2009-03-18 HILTI Aktiengesellschaft Machine-outil manuelle dotée d'un mécanisme de percussion à ressort pneumatique, moteur linéaire et procédé de commande
EP2103393A1 (fr) * 2008-03-18 2009-09-23 Black & Decker, Inc. Marteau électrique avec mécanisme d'amortissement à vibrations

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
US6508315B1 (en) * 2001-06-07 2003-01-21 Steven James Lindsay Small impact power tool
US6691798B1 (en) * 2002-06-19 2004-02-17 Steven James Lindsay Variable hand pressure activated power tool

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025830A (en) * 1978-07-21 1980-01-30 Hilti Ag Hammer drill
EP1452278A1 (fr) * 2003-03-01 2004-09-01 HILTI Aktiengesellschaft Méthode de contrôle d'un marteau électrique à percussion
EP1466702A1 (fr) * 2003-04-11 2004-10-13 HILTI Aktiengesellschaft Contrôle d'un outil électrique
GB2411375A (en) * 2004-02-26 2005-08-31 South West Highways Ltd Vibration reduction in pneumatic tools.
EP2036680A2 (fr) * 2007-09-12 2009-03-18 HILTI Aktiengesellschaft Machine-outil manuelle dotée d'un mécanisme de percussion à ressort pneumatique, moteur linéaire et procédé de commande
EP2103393A1 (fr) * 2008-03-18 2009-09-23 Black & Decker, Inc. Marteau électrique avec mécanisme d'amortissement à vibrations

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103372850A (zh) * 2012-04-19 2013-10-30 喜利得股份公司 手持工具设备
US9815160B2 (en) 2012-05-25 2017-11-14 Robert Bosch Gmbh Percussion unit
WO2013174641A1 (fr) * 2012-05-25 2013-11-28 Robert Bosch Gmbh Unité de percussion
CN104428106A (zh) * 2012-05-25 2015-03-18 罗伯特·博世有限公司 冲击机构单元
US20150202758A1 (en) * 2012-05-25 2015-07-23 Rainer Nitsche Percussion Unit
CN104428106B (zh) * 2012-05-25 2018-04-13 罗伯特·博世有限公司 冲击机构单元
CN104334318A (zh) * 2012-05-25 2015-02-04 罗伯特·博世有限公司 冲击机构单元
DE102013208902B4 (de) 2013-05-14 2023-12-14 Robert Bosch Gmbh Handwerkzeugvorrichtung
US11241778B2 (en) * 2013-06-28 2022-02-08 Robert Bosch Gmbh Hand-held power tool device
WO2016087405A1 (fr) * 2014-12-03 2016-06-09 Hilti Aktiengesellschaft Machine-outil portative et procédé pour assurer la commande de ladite machine-outil portative
WO2016087426A1 (fr) * 2014-12-03 2016-06-09 Hilti Aktiengesellschaft Procédé de commande pour une machine-outil portative
US10369686B2 (en) 2014-12-03 2019-08-06 Hilti Aktiengesellschaft Hand-held power tool and control method therefor
US10493611B2 (en) 2014-12-03 2019-12-03 Hilti Aktiengesellschaft Control method for a hand-held power tool
EP3028820A1 (fr) * 2014-12-03 2016-06-08 HILTI Aktiengesellschaft Machine-outils portative et procédé de commande associé
EP3028821A1 (fr) * 2014-12-03 2016-06-08 HILTI Aktiengesellschaft Procédé de contrôle pour une machine-outils portative

Also Published As

Publication number Publication date
CN101733735A (zh) 2010-06-16
CN101733735B (zh) 2014-12-03
DE102008044044A1 (de) 2010-05-27
EP2189249B1 (fr) 2018-01-17

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