EP1379363B1 - Machine-outil manuelle - Google Patents

Machine-outil manuelle Download PDF

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Publication number
EP1379363B1
EP1379363B1 EP02727246A EP02727246A EP1379363B1 EP 1379363 B1 EP1379363 B1 EP 1379363B1 EP 02727246 A EP02727246 A EP 02727246A EP 02727246 A EP02727246 A EP 02727246A EP 1379363 B1 EP1379363 B1 EP 1379363B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
portable power
power tool
control unit
percussion mechanism
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.)
Expired - Lifetime
Application number
EP02727246A
Other languages
German (de)
English (en)
Other versions
EP1379363A1 (fr
Inventor
Gerhard Meixner
Oliver Zirn
Egbert Schneider
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 EP1379363A1 publication Critical patent/EP1379363A1/fr
Application granted granted Critical
Publication of EP1379363B1 publication Critical patent/EP1379363B1/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
    • 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 relates to a hand tool according to the preamble of claim 1.
  • the invention relates to a hand tool, in particular a drill and / or chisel hammer, drivable in a housing of an electric motor Schlagtechnik over which an arranged in a tool holder insert tool is driven in a knocking manner, and with a sensor unit via which a characteristic for an idle position can be detected.
  • an idle spring can be completely dispensed with, for example, by a pressure sensor, a contact pressure of the insert tool is determined against an object to be processed, or by running an idle spring at least slightly and with a small force can, so that advantageously a small operating force to achieve a working position is sufficient.
  • the impact mechanism is advantageous interpretable exclusively on its impact function, and an idle function can be disregarded, resulting in constructive degrees of freedom.
  • the impact mechanism is robust by eliminating idle or vent holes executable, and it is an advantageous seal against dirt and lubricant loss can be achieved.
  • the solution according to the invention is basically applicable to all hand tool machines whose application tools are driven in a hammering manner, in particular in impact drills, rotary hammers, chisel hammers, etc.
  • all electric motors which appear to be suitable to a person skilled in the art can be actively decelerated via a special motor control unit, such as asynchronous motors, synchronous motors or direct current 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 overloadable and can be loaded for a short time with a large torque and thus with a large braking torque. A large current can flow without the danger of a brush fire.
  • an armature of the electronically commutated electric motor may be implemented with an armature winding having an overall lower mass due to a missing armature winding compared to an armature of a conventional electric motor.
  • the armature of the electronically commutated electric motor thereby stores during operation a lower rotational energy 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 hammer mechanism can be braked with a separate brake unit, the active braking of the electric motor can be supported and a standstill of the electric motor or percussion mechanism can be achieved particularly quickly.
  • the separate brake unit can be designed in various ways, for example, this may be formed by a mechanical or an electromechanical unit, etc.
  • a drive piston of the percussion mechanism is decelerated to a standstill between 0.1 and 3 beat cycles of the percussion mechanism, whereby wear of the impact mechanism can be reduced and comfort can be increased, in particular by avoiding unnecessary vibrations.
  • the percussion mechanism has a pot piston
  • a cost-effective piston can be achieved in which a racket and the piston can be connected by friction. Due to the direct contact between the pot piston and the racket of the racket on the pot piston advantageous in the transition accelerated from an idle position to a working position in a short time and delayed by the inventive solution by the active braking of the electric motor in the transition from a working position to an idle position in a short time.
  • the solution according to the invention can also be used in percussion devices which have a piston guided in a cylinder or in a hammer tube.
  • a motor control unit is embodied at least partially in one piece with an already existing power control unit of the electric motor, it is advantageously possible to save components, installation space and weight.
  • the engine control unit can be implemented in one piece with a power control unit of the electric motor in a simple manner.
  • 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, via which, however, in particular a contact force of the insert tool against an object to be machined and / or a position of the insert tool or a component moved with the insert tool should be detectable.
  • the sensor unit has at least one electronic sensor. This is small and easy to carry out and can be integrated to save space on small hand tool machines particularly advantageous.
  • the information from the sensor to the engine control unit can be transmitted via electrical lines, via radio, optically and / or mechanically, etc.
  • Fig. 1 shows a schematic representation of a partial section through a hammer drill with a drivable in a housing 10 by an electric motor 12 striking mechanism 14, wherein the electric motor 12 is formed by an electrically commutated motor.
  • a pinion 36 is integrally formed, which meshes with a mounted on a bearing pin 38 spur gear 40.
  • spur gear 40 On the spur gear 40, an eccentric pin 42 is fixed, via which a pot piston 24 of the percussion mechanism 14 can be driven.
  • a racket 26 is slidably mounted, which acts via an anvil 46 on the mounted in a tool holder 16 insert tool 18 or on a fixed in the tool holder 16 drill.
  • the hammer drill has a sensor unit 30, with an electronic sensor 20, via which a characteristic for an idle position can be detected.
  • the electric motor 12 and thus the percussion mechanism 14 can be actively braked via a motor control unit 22 when the idling position is detected, with the engine control unit 22 being largely integral with an already existing power control unit 28 of the electric motor 12.
  • the pot piston 24, the racket 26 and the striker 46 striking driven insert tool 18 from an object to be processed presses a non-illustrated idle spring in operative connection with the insert tool 18 and in the tool holder 16 axially displaceably mounted striker 46 in an initial position axially in the direction of the object to be processed.
  • the electronic sensor 20 of the sensor unit 30 fastened in the housing 10 in the area of the tool holder 16 detects an idle position or the neutral position of the striker 46 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 to the engine control unit 22 forwards.
  • the engine control unit 22 causes an active braking of the electric motor 12, in such a way that electromagnetically generated forces of the electric motor 12 counter to the direction of rotation of the shaft 34 and the pot piston 24 of the act Schlagtechniks 14 comes to a standstill after a detected idle position approx.
  • the electronic sensor 20 sends a signal via the signal line 32 to the evaluation unit 48 and this in turn sends a signal via the signal line 44 to the engine control unit 22, which causes a targeted, tuned to the present percussion 14 start-up of the electric motor 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

L'invention concerne une machine-outil manuelle, notamment un marteau pneumatique et/ou trépan, comportant un mécanisme de percussion (14) entraîné par un moteur électrique (12) dans un boîtier (10). Ledit mécanisme de percussion permet d'entraîner en percussion un outil d'insertion (18) logé dans un support d'outil (16). La machine-outil selon l'invention comporte par ailleurs une unité capteur (30) permettant de détecter une grandeur caractéristique d'une position de marche à vide. Dans le cas d'une détection d'une position de marche à vide, une unité de commande moteur (22) permet de freiner activement le moteur électrique (12) et donc le mécanisme de percussion (14).

Claims (7)

  1. Machine électroportative notamment perforateur et/ou ciseau, comportant un boîtier (10) et un mécanisme de percussion (14) entraîné par un moteur électrique (12), par lequel un outil insérable (18), installé dans un porte-outils (16), est entraîné en percussion et une unité de capteur (30) capte une position de ralenti par une grandeur caractéristique,
    caractérisée en ce que
    lorsqu'une position de marche à vide est détectée, une unité de commande de moteur (22) freine le moteur électrique (12) et le mécanisme de frappe (14) lié à celui-ci.
  2. Machine électroportative selon la revendication 1,
    caractérisée en ce que
    le moteur électrique (12) est un moteur à commutation électronique.
  3. Machine électroportative selon la revendication 1 ou 2,
    caractérisée par
    un piston d'entraînement (24) du mécanisme de percussion (4) est freiné jusqu'à l'arrêt une fois reconnue la position de marche à vide entre 0,1 et 3 cadences de frappe du mécanisme de frappe.
  4. Machine électroportative selon l'une des revendications précédentes,
    caractérisée en ce que
    le mécanisme de frappe (14) est freiné par une unité de freinage distincte.
  5. Machine électroportative selon l'une des revendications précédentes,
    caractérisée en ce que
    le mécanisme de frappe (14) comporte un piston d'entraînement (24) constitué par un piston en forme de pot.
  6. Machine électroportative selon l'une des revendications précédentes,
    caractérisée en ce que
    l'unité de commande de moteur (22) est réalisée au moins en partie en une seule pièce avec l'unité de commande de puissance (28) équipant déjà le moteur électrique (12).
  7. Machine électroportative selon l'une des revendications précédentes,
    caractérisée en ce que
    l'unité de capteur (30) comporte au moins un capteur électronique (20).
EP02727246A 2001-04-06 2002-03-19 Machine-outil manuelle Expired - Lifetime EP1379363B1 (fr)

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 (fr) 2001-04-06 2002-03-19 Machine-outil manuelle

Publications (2)

Publication Number Publication Date
EP1379363A1 EP1379363A1 (fr) 2004-01-14
EP1379363B1 true EP1379363B1 (fr) 2008-05-28

Family

ID=7680587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02727246A Expired - Lifetime EP1379363B1 (fr) 2001-04-06 2002-03-19 Machine-outil manuelle

Country Status (6)

Country Link
US (1) US6843327B2 (fr)
EP (1) EP1379363B1 (fr)
JP (1) JP2004518552A (fr)
CN (1) CN1262397C (fr)
DE (2) DE10117123A1 (fr)
WO (1) WO2002081154A1 (fr)

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GB2407790A (en) * 2003-11-04 2005-05-11 Black & Decker Inc Vibration reduction apparatus for a power tool
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DE102005028918A1 (de) * 2005-06-22 2006-12-28 Wacker Construction Equipment Ag Bohr- und/oder Schlaghammer mit Leerlaufsteuerung
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DE102006056849A1 (de) * 2006-12-01 2008-06-05 Robert Bosch Gmbh Handwerkzeugmaschine
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DE102009046789A1 (de) * 2009-11-17 2011-05-19 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
EA030710B1 (ru) * 2010-02-09 2018-09-28 Хайторк Дивижн Юнекс Корпорейшн Устройство для затягивания резьбовых соединений
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EP2994799B1 (fr) 2013-03-15 2018-11-21 John Alberti Outil électrique répondant à la force
JP6148609B2 (ja) * 2013-11-21 2017-06-14 株式会社マキタ 電動工具
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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 (fr) * 2014-11-20 2016-05-25 HILTI Aktiengesellschaft Procédé de commande d'une perceuse
CN107206581B (zh) * 2015-01-28 2020-11-10 工机控股株式会社 冲击工具
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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
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Also Published As

Publication number Publication date
WO2002081154A1 (fr) 2002-10-17
US6843327B2 (en) 2005-01-18
CN1262397C (zh) 2006-07-05
JP2004518552A (ja) 2004-06-24
US20040003930A1 (en) 2004-01-08
EP1379363A1 (fr) 2004-01-14
DE50212320D1 (de) 2008-07-10
DE10117123A1 (de) 2002-10-17
CN1460047A (zh) 2003-12-03

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