EP1379362B1 - Machine-outil a main - Google Patents

Machine-outil a main Download PDF

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Publication number
EP1379362B1
EP1379362B1 EP02708227A EP02708227A EP1379362B1 EP 1379362 B1 EP1379362 B1 EP 1379362B1 EP 02708227 A EP02708227 A EP 02708227A EP 02708227 A EP02708227 A EP 02708227A EP 1379362 B1 EP1379362 B1 EP 1379362B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
housing
tool
protective device
detected
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
EP02708227A
Other languages
German (de)
English (en)
Other versions
EP1379362A1 (fr
Inventor
Peter Nadig
Oliver Zirn
Ludwig Thome
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7680585&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1379362(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1379362A1 publication Critical patent/EP1379362A1/fr
Application granted granted Critical
Publication of EP1379362B1 publication Critical patent/EP1379362B1/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
    • 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
    • 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
    • B25D16/003—Clutches specially adapted therefor
    • 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
    • B25D2250/195—Regulation means
    • B25D2250/205—Regulation means for torque
    • 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.
  • a hand tool namely a hand-held drill with a housing arranged in an electric motor known, via which an arranged in a tool holder insert tool or a drill is driven in rotation.
  • the hand tool has a protective device with which a so-called uncontrolled blocking case of the insert tool can be detected via a sensor and a drive of the insert tool can be prevented.
  • An uncontrolled lock case occurs when the insert tool jams in the workpiece to be machined, the reaction torque acting on the housing exceeds a holding force of an operator, and the housing uncontrollably at a certain angular velocity and over a certain Angular range rotates about an axis. If the holding force of the operator is greater than the present reaction torque or if the operator holds the power tool during a blocking case, there is a so-called controlled blocking case.
  • the protective device of the EP 0 303 651 B2 known hand tool has a arranged in a drive train of the power tool clutch for interrupting the rotary drive activity in an uncontrolled blocking case. Further, the protective device has a holding device between the coupling and the insert tool, via which the drive train is connected to the housing in an uncontrolled blocking case.
  • the holding device is formed by an electrically releasable brake.
  • a hand tool according to the preamble of claim 1 is made EP 666148 A1 known.
  • the invention relates to a hand tool with an electric motor arranged in a housing, via which an insert tool arranged in a tool holder is driven in rotation, and with a protective device with a sensor unit via a characteristic for an uncontrolled blocking case of the insert detected and the housing in his movement is braked.
  • the protective device is at least partially formed by a motor control unit, via which the electric motor can be actively braked when the uncontrolled blocking event of the insertion tool is detected.
  • An additional Brake or blocking unit can be completely avoided or particularly space-saving and easily performed. Additional components, weight, installation space, assembly costs and costs can be saved. With the structurally simple protection device, resetting and wear problems on an additional brake unit can be avoided.
  • the protective device is basically used in all hand tooling machines, their tools are driven in rotation, such as angular and eccentric grinders, circular saws, chainsaws, etc., and especially in hand drills, impact drills and drills.
  • the electric motor is 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 decelerated 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.
  • a motor control unit is embodied at least partially in one piece with an already existing power control of the electric motor, components, installation space and weight can advantageously be saved.
  • the engine control unit can be implemented in one piece with a power control unit of the electric motor in a simple manner.
  • the housing can advantageously be braked in an uncontrolled blocking event with a low engine load.
  • the separate brake unit can be designed in various ways, for example, this may be formed by a mechanical or an electromechanical unit, etc.
  • the sensor unit has an electronic acceleration sensor, via which an angular velocity and an angular acceleration of the housing as well as an angle range swept by the housing can be detected.
  • Sensor for engine control unit can be transmitted via electrical lines, via radio, optical and / or mechanical, etc.
  • Fig. 1 shows a partial section through a hammer drill with an arranged in a housing 10 electric motor 12, which is formed by an electronically commutated motor.
  • electric motor 12 Above the electric motor 12 is a tool holder 14 mounted in an insert tool 16 and a drill rotatably driven.
  • the hammer drill has a protective device 18, with a sensor unit 20 a characteristic for an uncontrolled blocking case of the insert tool 16 can be detected and the housing 10 is braked in its movement.
  • the protective device 18 is partially formed by a motor control unit 22, via which the electric motor 12 can be braked in the event of a detected uncontrolled blocking event of the insertion tool 16.
  • the engine control unit 22 is largely in one piece with an existing power control unit 24 of the electric motor 12 executed.
  • a pinion 28 is formed, which meshes with a mounted on a bearing pin 44 spur gear 30.
  • a pinion 32 is integrally formed, which meshes with a arranged on a drill spindle 34 ring gear 36.
  • the tool holder 14 is driven.
  • 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 against the direction of rotation of the shaft 26 act.
  • the motor control unit 22 is adjusted in such a way or generated via the electric motor 12 a braking torque in size, that the housing 10 and the rotary hammer after a swept angle range less than 30 ° comes to a standstill and a threat to the operator can be excluded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

L'invention concerne une machine-outil à main qui comprend un moteur électrique (12) logé dans un carter (10) et entraînant en rotation un outil interchangeable (16) placé dans un porte-outil (14), ainsi qu'un dispositif de protection (18) permettant de détecter, par l'intermédiaire d'une unité de détection (20), une grandeur caractéristique pour un cas de blocage non maîtrisé de l'outil interchangeable (16) et de freiner le carter (10) dans son mouvement. Selon l'invention, le dispositif de protection (18) est formé au moins partiellement par une unité de commande de moteur (22) permettant de freiner activement le moteur électrique (12) lorsqu'un cas de blocage non maîtrisé de l'outil interchangeable (16) est détecté.

Claims (2)

  1. Machine-outil à main comprenant un moteur électrique (12) disposé dans un boîtier (10), par le biais duquel un outil amovible (16) disposé dans un porte-outil (14) peut être entraîné en rotation, et comprenant un dispositif de protection (18), avec lequel, par l'intermédiaire d'une unité de capteur (20), une grandeur caractéristique d'un blocage incontrôlé de l'outil amovible (16) peut être détectée et le boîtier (10) peut être freiné dans son mouvement, l'unité de capteur (20) présentant au moins un capteur réalisé sous forme de capteur d'accélération électronique (42), par le biais duquel une vitesse angulaire et une accélération angulaire du boîtier (10) ainsi qu'une plage angulaire parcourue par le boîtier (10) peuvent être détectées, et le dispositif de protection (18) comprenant une unité d'analyse (46) qui analyse un mouvement de rotation détecté par le capteur d'accélération (42) de l'unité de capteur (20), le moteur électrique (12) étant formé par un moteur à commutation électronique, caractérisée en ce que le dispositif de protection (18) est formé au moins en partie par une unité de commande de moteur (22), par le biais de laquelle, lorsqu'un blocage incontrôlé de l'outil amovible (16) est détecté, le moteur électrique (12) peut être freiné activement, et ce par production de forces électromagnétiques par le moteur électrique (12), lesquelles agissent à l'encontre du sens de rotation de l'outil amovible (16), l'unité d'analyse (46) transmettant une impulsion à l'unité de commande de moteur (22) en présence d'une accélération angulaire déterminée et pour une plage angulaire parcourue déterminée.
  2. Machine-outil à main selon la revendication précédente, caractérisée en ce que le dispositif de protection présente une unité de frein séparée.
EP02708227A 2001-04-06 2002-02-09 Machine-outil a main Expired - Lifetime EP1379362B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117121A DE10117121A1 (de) 2001-04-06 2001-04-06 Handwerkzeugmaschine
DE10117121 2001-04-06
PCT/DE2002/000477 WO2002081153A1 (fr) 2001-04-06 2002-02-09 Machine-outil a main

Publications (2)

Publication Number Publication Date
EP1379362A1 EP1379362A1 (fr) 2004-01-14
EP1379362B1 true EP1379362B1 (fr) 2011-05-25

Family

ID=7680585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708227A Expired - Lifetime EP1379362B1 (fr) 2001-04-06 2002-02-09 Machine-outil a main

Country Status (6)

Country Link
US (1) US7055620B2 (fr)
EP (1) EP1379362B1 (fr)
JP (1) JP2004518551A (fr)
CN (1) CN1304172C (fr)
DE (1) DE10117121A1 (fr)
WO (1) WO2002081153A1 (fr)

Cited By (3)

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US8286723B2 (en) 2010-01-07 2012-10-16 Black & Decker Inc. Power screwdriver having rotary input control
US8418778B2 (en) 2010-01-07 2013-04-16 Black & Decker Inc. Power screwdriver having rotary input control
USRE44311E1 (en) 2004-10-20 2013-06-25 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor

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USRE44311E1 (en) 2004-10-20 2013-06-25 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor
USRE44993E1 (en) 2004-10-20 2014-07-08 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor
USRE45112E1 (en) 2004-10-20 2014-09-09 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor
US8286723B2 (en) 2010-01-07 2012-10-16 Black & Decker Inc. Power screwdriver having rotary input control
US8418778B2 (en) 2010-01-07 2013-04-16 Black & Decker Inc. Power screwdriver having rotary input control

Also Published As

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US20030116332A1 (en) 2003-06-26
CN1304172C (zh) 2007-03-14
JP2004518551A (ja) 2004-06-24
US7055620B2 (en) 2006-06-06
WO2002081153A1 (fr) 2002-10-17
CN1460046A (zh) 2003-12-03
EP1379362A1 (fr) 2004-01-14
DE10117121A1 (de) 2002-10-17

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