EP1379363A1 - Handwerkzeugmaschine - Google Patents
HandwerkzeugmaschineInfo
- Publication number
- EP1379363A1 EP1379363A1 EP02727246A EP02727246A EP1379363A1 EP 1379363 A1 EP1379363 A1 EP 1379363A1 EP 02727246 A EP02727246 A EP 02727246A EP 02727246 A EP02727246 A EP 02727246A EP 1379363 A1 EP1379363 A1 EP 1379363A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- control unit
- striking mechanism
- striking
- hand tool
- 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
Links
Classifications
-
- 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
- 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
- B25D2250/131—Idling mode of 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 is based on a hand tool according to the preamble of claim 1.
- EP 0 303 651 B2 discloses a hand-held power tool, namely a hammer drill, with a striking mechanism that can be driven by an electric motor, in which a clutch arranged in the drive train automatically prints out when a predetermined movement quantity detected by a sensor is reached, specifically to interrupt a striking drive activity of the striking mechanism in an idle position.
- a path position of a striking mechanism part or an insert tool located on an idling line is recorded as the movement quantity.
- the clutch automatically engages again.
- the sensor activates a control device, which in turn leads a control pulse to an electromagnetic release actuator, which acts on the clutch and prints it out.
- the invention is based on a hand-held power tool, in particular a hammer drill and / or chisel hammer, with a hammer mechanism that can be driven by an electric motor, via which an insertion tool arranged in a tool holder can be driven, and with a sensor unit, via which one Parameter can be recorded for an idle position
- the electric motor and thus the striking mechanism can be actively braked when an idle position is detected via a motor control unit.
- An additional idle clutch and a safety gear for a hit can be avoided and additional components, weight, installation space, installation effort and costs can be saved. Wear problems on an additional idle clutch can be avoided.
- an idling spring can be completely dispensed with, for example by using a pressure sensor to determine a contact force of the insert tool against an object to be machined, or by at least making an idling spring light and with a small actuating force can, so that advantageously a small actuating force is sufficient to achieve a working position.
- the striking mechanism can advantageously be designed exclusively for its striking function, and an idling function can be disregarded, resulting in constructive degrees of freedom.
- the striking mechanism can be made robust by dispensing with no-load or ventilation bores, and an advantageous seal against dirt and loss of lubricant can be achieved.
- the striking mechanism can be started up quickly and specifically, and the start-up behavior can be easily matched to the striking mechanism by controlling the electric motor accordingly.
- the solution according to the invention can in principle be used in all hand-held power tools, the tools of which can be driven in a striking manner, in particular in the case of hammer drills, rotary hammers, chisel hammers, etc.
- all electric motors that appear to be suitable to a person skilled in the art can be actively braked via a special motor control unit, such as asynchronous motors, synchronous motors or DC motors, etc., via a brake control.
- the electric motor is particularly advantageously formed by an electronically commutated motor.
- the brushless, electronically commutated motors, in particular reluctance motors, are particularly overload-resistant and can be loaded with a large torque for a short time and then with a large braking torque. A large current can flow without the risk of a burst fire.
- an armature of the electronically commutated electric motor can be designed with an armature winding having an overall lower mass compared to an armature of a conventional electric motor due to a missing armature winding.
- the armature of the electronically commutated electric motor stores less rotational energy during operation and can be braked quickly with little energy.
- the electronically commutated electric motor can advantageously be braked with a large DC link capacitor or with a brake chopper in a brake circuit.
- the striking mechanism can be braked with a separate brake unit, active braking of the electric motor can be supported and the electric motor or the striking mechanism can be brought to a standstill particularly quickly.
- the separate braking unit can be designed in different ways, for example it can be formed by a mechanical or an electromechanical unit, etc.
- a drive piston of the striking mechanism is particularly advantageously braked to a standstill between 0.1 and 3 striking cycles of the striking mechanism after idling position has been detected, as a result of which wear of the striking mechanism is reduced and comfort can be increased, in particular by avoiding unnecessary vibrations ,
- the striking mechanism has a pot piston
- an inexpensive piston can be achieved in which a pop and the piston can be connected in terms of friction. Due to the direct contact between the pot piston and the racket, the racket can be advantageous over the pot piston during the transition from an idle position m to a working position m accelerated and decelerated with the solution according to the invention by actively braking the electric motor when changing from a working position to an idling position.
- the solution according to the invention can also be used with striking mechanisms which have a piston guided in a cylinder or in a hammer tube.
- a motor control unit is at least partially built in one piece with an already existing power control unit of the electric motor, components, installation space and weight can advantageously be saved.
- the motor control unit can be designed in one piece with a power control unit of the electric motor.
- the sensor unit can have various sensors which appear suitable to a person skilled in the art, for example electronic, electromechanical and / or mechanical sensors, but via which, in particular, a contact force of the insert tool against an object to be processed and / or a position of the insert tool or one with the insert tool moving component should be detectable.
- the sensor unit particularly advantageously has at least one electronic sensor. This is small and easy to carry out and can be particularly advantageously integrated into small handheld machine tools in a space-saving manner.
- the information from the sensor to the engine control unit can be transmitted via electrical lines, via radio, optically and / or mechanically, etc. drawing
- FIG. 1 shows a schematic illustration of a partial section through a hammer drill with a striking mechanism 14 which can be driven in a housing 10 by an electric motor 12, the electric motor 12 being formed by an electrically commutated motor.
- a pinion 36 which meshes with a spur gear 40 mounted on a bearing pin 38, is formed on an end of a shaft 34 of the electric motor 12 facing an axis of rotation of an insert tool 18.
- An eccentric pin 42 is fastened on the spur gear 40, by means of which a pot piston 24 of the striking mechanism 14 can be driven.
- a pot piston 24 of the striking mechanism 14 In the pot piston 24 is a
- the hammer drill has a sensor unit 30 with an electronic sensor 20, by means of which a parameter for an idle position can be detected.
- the electric motor 12 and thus the striking mechanism 14 can be actively braked by means of a motor control unit 22, the motor control unit 22 being implemented largely in one piece with an already existing power control unit 28 of the electric motor 12
- an idle spring (not shown in greater detail) prints the operative connection with the insert tool 18 and in the tool holder 16 axially displaceable Dopper 46 m an initial position axially m direction of the object to be processed.
- the electronic sensor 20 of the sensor unit 30 fastened in the area of the tool holder 16 in the housing 10 detects an idle position or a path position of the double 46 assigned to the idle position and sends a signal via a signal line 32 to an evaluation unit 48, which in turn sends a pulse via a signal line 44 forwards to the engine control unit 22.
- the motor control unit 22 actively brakes the electric motor 12 in such a way that electromagnetically generated forces of the electric motor 12 act counter to the direction of rotation of the shaft 34 and the pot piston 24 of the Percussion mechanism 14 comes to a standstill after a recognized idling position approx.
- the electronic sensor 20 sends a signal via the signal line 32 to the evaluation unit 48, which in turn sends a signal via the signal line 44 the motor control unit 22, which causes the electric motor 12 to be started up in a targeted manner that is coordinated with the present percussion mechanism 14.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10117123 | 2001-04-06 | ||
DE10117123A DE10117123A1 (de) | 2001-04-06 | 2001-04-06 | Handwerkzeugmaschine |
PCT/DE2002/000982 WO2002081154A1 (de) | 2001-04-06 | 2002-03-19 | Handwerkzeugmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1379363A1 true EP1379363A1 (de) | 2004-01-14 |
EP1379363B1 EP1379363B1 (de) | 2008-05-28 |
Family
ID=7680587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02727246A Expired - Lifetime EP1379363B1 (de) | 2001-04-06 | 2002-03-19 | Handwerkzeugmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US6843327B2 (de) |
EP (1) | EP1379363B1 (de) |
JP (1) | JP2004518552A (de) |
CN (1) | CN1262397C (de) |
DE (2) | DE10117123A1 (de) |
WO (1) | WO2002081154A1 (de) |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10259566A1 (de) * | 2002-12-19 | 2004-07-01 | Hilti Ag | Schlagende Elektrohandwerkzeugmaschine |
DE10302089B3 (de) * | 2003-01-17 | 2004-10-14 | Hilti Ag | Schlagende Elektrohandwerkzeugmaschine mit einem Piezoaktor |
DE10309012B3 (de) * | 2003-03-01 | 2004-08-12 | Hilti Ag | Steuerverfahren einer axial schlagenden und drehenden Elektrohandwerkzeugmaschine |
DE10316844A1 (de) * | 2003-04-11 | 2004-11-04 | Hilti Ag | Steuerung einer Elektrohandwerkzeugmaschine |
GB2407789A (en) * | 2003-11-04 | 2005-05-11 | Black & Decker Inc | Vibration reduction apparatus for a power tool |
GB2407790A (en) * | 2003-11-04 | 2005-05-11 | Black & Decker Inc | Vibration reduction apparatus for a power tool |
GB2407791A (en) * | 2003-11-04 | 2005-05-11 | Black & Decker Inc | Vibration reduction apparatus for a power tool |
DE10353013A1 (de) * | 2003-11-13 | 2005-06-16 | Robert Bosch Gmbh | Handwerkzeugmaschine |
DE10358032A1 (de) * | 2003-12-11 | 2005-07-14 | Hilti Ag | Kombinierte Elektrohandwerkzeugmaschine |
DE102004003202B4 (de) | 2004-01-22 | 2022-05-25 | Robert Bosch Gmbh | Handgriff mit Erfassungseinrichtung |
US7318768B2 (en) * | 2004-04-13 | 2008-01-15 | Black & Decker Inc. | Low profile electric sander |
US6929074B1 (en) * | 2004-06-08 | 2005-08-16 | Mobiletron Electronics Co., Ltd. | Elbow-type power hand tool |
US7431682B2 (en) * | 2004-12-17 | 2008-10-07 | Milwaukee Electric Tool Corporation | Smart accessories for power tools |
GB0503784D0 (en) * | 2005-02-24 | 2005-03-30 | Black & Decker Inc | Hammer drill |
DE102005028918A1 (de) * | 2005-06-22 | 2006-12-28 | Wacker Construction Equipment Ag | Bohr- und/oder Schlaghammer mit Leerlaufsteuerung |
GB0523008D0 (en) * | 2005-11-11 | 2005-12-21 | Internat Engineering Component | Impact machine |
EP1872912B1 (de) * | 2006-07-01 | 2014-03-19 | Black & Decker Inc. | Bohrhammer mit einer Döpperträgerkonstruktion |
DE102006056849A1 (de) * | 2006-12-01 | 2008-06-05 | Robert Bosch Gmbh | Handwerkzeugmaschine |
DE102009000515A1 (de) | 2009-01-30 | 2010-08-05 | Hilti Aktiengesellschaft | Steuerungsverfahren und Handwerkzeugmaschine |
DE102009046789A1 (de) * | 2009-11-17 | 2011-05-19 | Robert Bosch Gmbh | Handwerkzeugmaschinenvorrichtung |
AU2011213984B2 (en) * | 2010-02-09 | 2015-07-16 | HYTORC Division Unex Corporation | Apparatus for tightening threaded fasteners |
DE102010043032A1 (de) * | 2010-10-28 | 2012-05-03 | Hilti Aktiengesellschaft | Steuerungsverfahren für eine Werkzeugmaschine und eine Werkzeugmaschine |
CN103078574B (zh) * | 2011-10-25 | 2015-04-15 | 深圳万讯自控股份有限公司 | 一种直流无刷电机的有源制动控制方法和系统 |
US9908182B2 (en) | 2012-01-30 | 2018-03-06 | Black & Decker Inc. | Remote programming of a power tool |
DE102012204172A1 (de) * | 2012-03-16 | 2013-09-19 | Robert Bosch Gmbh | Handwerkzeugmaschine |
US9193055B2 (en) | 2012-04-13 | 2015-11-24 | Black & Decker Inc. | Electronic clutch for power tool |
DE102012208870A1 (de) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Schlagwerkeinheit |
US8919456B2 (en) | 2012-06-08 | 2014-12-30 | Black & Decker Inc. | Fastener setting algorithm for drill driver |
CA2902213C (en) * | 2013-03-15 | 2021-05-18 | John Alberti | Force responsive power tool |
JP6148609B2 (ja) * | 2013-11-21 | 2017-06-14 | 株式会社マキタ | 電動工具 |
US9434056B2 (en) | 2013-12-12 | 2016-09-06 | Ingersoll-Rand Company | Impact tools with pressure verification and/or adjustment |
DE102014206076A1 (de) * | 2014-03-31 | 2015-10-01 | Robert Bosch Gmbh | Handwerkzeugmaschine, Verfahren zum Betreiben |
JP6331082B2 (ja) * | 2014-05-30 | 2018-05-30 | 日立工機株式会社 | 電動工具 |
EP3023200A1 (de) * | 2014-11-20 | 2016-05-25 | HILTI Aktiengesellschaft | Steuerungsverfahren für einen Bohrhammer |
EP3251800A4 (de) * | 2015-01-28 | 2018-09-19 | Koki Holdings Kabushiki Kaisha | Schlagwerkzeug |
CN107206582B (zh) * | 2015-01-28 | 2021-06-08 | 工机控股株式会社 | 冲击工具 |
US10406662B2 (en) | 2015-02-27 | 2019-09-10 | Black & Decker Inc. | Impact tool with control mode |
US10179424B2 (en) * | 2015-10-28 | 2019-01-15 | Caterpillar Inc. | Diagnostic system for measuring acceleration of a demolition hammer |
CN106671031A (zh) * | 2015-11-10 | 2017-05-17 | 苏州宝时得电动工具有限公司 | 动力工具的减振装置及其方法 |
CN107717008A (zh) * | 2017-10-30 | 2018-02-23 | 徐应盈 | 一种便捷式家用电钻 |
JP7278169B2 (ja) * | 2019-08-07 | 2023-05-19 | 株式会社マキタ | 打撃工具 |
WO2021202968A1 (en) * | 2020-04-02 | 2021-10-07 | Milwaukee Electric Tool Corporation | Power tool |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2814277A (en) * | 1955-12-27 | 1957-11-26 | Ingersoll Rand Co | Shut-down mechanism for pneumatic tools |
US3458793A (en) * | 1966-09-27 | 1969-07-29 | Ram Tool Corp | Permanent magnet motor for hand tools and speed control systems therefor |
DE2832169A1 (de) * | 1978-07-21 | 1980-01-31 | Hilti Ag | Motorisch betriebener bohrhammer |
SE444528B (sv) * | 1983-01-26 | 1986-04-21 | Stabilator Ab | Sett och anordning for att styra slagenergin hos ett slagborrverk som funktion av borrnackens lege |
EP0303651B2 (de) * | 1987-03-05 | 1999-12-01 | Robert Bosch Gmbh | Verfahren zum unterbrechen der antriebstätigkeit, insbesondere der schlag- und/oder drehantriebstätigkeit, einer handwerkzeugmaschine |
US5000000A (en) * | 1988-08-31 | 1991-03-19 | University Of Florida | Ethanol production by Escherichia coli strains co-expressing Zymomonas PDC and ADH genes |
DE3938787A1 (de) * | 1989-11-23 | 1991-05-29 | Gardner Denver Gmbh | Elektroschrauber |
DE4112012A1 (de) * | 1991-04-12 | 1992-10-15 | Bosch Gmbh Robert | Handwerkzeugmaschine mit blockiersensor |
DE4334933C2 (de) * | 1993-10-13 | 1997-02-20 | Fraunhofer Ges Forschung | Verfahren und Vorrichtung zum zwangsweisen Abschalten von handgeführten Arbeitsmitteln |
DE4401686C1 (de) * | 1994-01-21 | 1995-06-14 | Reich Maschf Gmbh Karl | Wendepolloser Kommutatormotor |
DE19510964A1 (de) * | 1995-03-24 | 1996-09-26 | Hilti Ag | Handgerät zur trockenen materialabtragenden Bearbeitung von spröden und/oder duktil versagenden Bauteilen und Adapter für ein Hammerbohrgerät |
US5884323A (en) * | 1995-10-13 | 1999-03-16 | 3Com Corporation | Extendible method and apparatus for synchronizing files on two different computer systems |
DE19641618A1 (de) * | 1996-10-09 | 1998-04-30 | Hilti Ag | Einrichtung und Verfahren für handgeführte Werkzeugmaschinen zur Vermeidung von Unfällen durch Werkzeugblockieren |
DE19646382A1 (de) * | 1996-11-11 | 1998-05-14 | Hilti Ag | Handgerät |
DE19832946A1 (de) * | 1998-07-22 | 2000-01-27 | Hilti Ag | Handbohrgerät mit drucklufterregtem Schlagwerk |
-
2001
- 2001-04-06 DE DE10117123A patent/DE10117123A1/de not_active Ceased
-
2002
- 2002-03-19 WO PCT/DE2002/000982 patent/WO2002081154A1/de active IP Right Grant
- 2002-03-19 DE DE50212320T patent/DE50212320D1/de not_active Expired - Lifetime
- 2002-03-19 JP JP2002579176A patent/JP2004518552A/ja not_active Ceased
- 2002-03-19 US US10/297,142 patent/US6843327B2/en not_active Expired - Fee Related
- 2002-03-19 EP EP02727246A patent/EP1379363B1/de not_active Expired - Lifetime
- 2002-03-19 CN CN02801072.8A patent/CN1262397C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO02081154A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20040003930A1 (en) | 2004-01-08 |
EP1379363B1 (de) | 2008-05-28 |
US6843327B2 (en) | 2005-01-18 |
WO2002081154A1 (de) | 2002-10-17 |
DE10117123A1 (de) | 2002-10-17 |
CN1460047A (zh) | 2003-12-03 |
JP2004518552A (ja) | 2004-06-24 |
DE50212320D1 (de) | 2008-07-10 |
CN1262397C (zh) | 2006-07-05 |
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