EP1379362A1 - Machine-outil a main - Google Patents

Machine-outil a main

Info

Publication number
EP1379362A1
EP1379362A1 EP02708227A EP02708227A EP1379362A1 EP 1379362 A1 EP1379362 A1 EP 1379362A1 EP 02708227 A EP02708227 A EP 02708227A EP 02708227 A EP02708227 A EP 02708227A EP 1379362 A1 EP1379362 A1 EP 1379362A1
Authority
EP
European Patent Office
Prior art keywords
electric motor
housing
tool
control unit
protective device
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
EP02708227A
Other languages
German (de)
English (en)
Other versions
EP1379362B1 (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(A1) "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

Links

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 is based on a hand tool according to the preamble of claim 1.
  • EP 0 303 651 B2 discloses a hand-held power tool, specifically a hand-held drill with an electric motor arranged in a housing, by means of which an insert tool or a drill arranged in a tool holder can be driven in rotation.
  • the hand-held power tool has a protective device with which a so-called uncontrolled blocking of the insert tool can be determined via a sensor and a drive of the insert tool can be prevented.
  • An uncontrolled blocking situation 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 moves uncontrolled at a certain angular velocity and over a agreed angular range rotates around an axis. If the holding force of the operator is greater than the present reaction torque or if the operator holds the handheld power tool in place during a blockage, there is a so-called controlled blockage case.
  • the protective device of the hand-held power tool known from EP 0 303 651 B2 has a coupling arranged in a drive train of the hand-held power tool to interrupt the rotary drive activity in the event of an uncontrolled blocking. Furthermore, the protective device has a holding device between the clutch and the insert tool, via which the drive train is connected to the housing in the event of an uncontrolled blocking.
  • the holding device is formed by an electrically triggerable brake.
  • the invention is based on a hand-held power tool with an electric motor arranged in a housing, via which an insert tool arranged in a tool holder can be driven in rotation, and with a protective device with which a parameter for an uncontrolled blocking of the insert tool can be detected and the housing in its movement can be braked.
  • the protective device is at least partially formed by a motor control unit, via which the electric motor can be actively braked when an uncontrolled blocking situation of the insert tool is detected.
  • An additional Braking or blocking unit can be completely avoided or can be carried out particularly space-saving and easy. Additional components, weight, installation space, installation effort and costs can be saved. With the structurally simple protective device, backpacking and wear problems on an additional brake unit can be avoided.
  • the protective device can basically be used with all hand-held power tools, the tools of which can be driven in rotation, such as with angle and eccentric grinders, circular saws, chain saws, etc., and in particular with hand drills, Schiag drilling machines and rotary hammers.
  • 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 subjected to a high torque for a short time and thus 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 with 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 thus stores a lower rotational speed during operation. energy and can be slowed down 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 at least partially made in one piece with an already existing power control 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 in a simple manner.
  • the housing can advantageously be braked with a low motor load in an uncontrolled blocking case.
  • the separate braking unit can be designed in different ways, for example it can be formed by a mechanical or an electromechanical unit, etc.
  • the sensor unit can have various sensors which appear to be suitable to the person skilled in the art, for example electronic, electromechanical and / or mechanical sensors, via which, however, in particular an angular velocity and an angular acceleration of the housing and an angular range swept by the housing 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 integrated particularly advantageously in small hand-held power tools.
  • the information from Sensor to the engine control unit can be transmitted via electrical lines, via radio, optically and / or mechanically, etc.
  • Fig. 1 shows a partial section through a hammer drill with an electric motor 12 arranged in a housing 10, which is formed by an electronically commutated motor.
  • An insert tool 16 or a drill, which is fastened in a tool holder 14, can be driven in rotation via the electric motor 12.
  • the hammer drill has a protective device 18, with which a parameter for an uncontrolled blocking of the insert tool 16 can be detected via a sensor unit 20 and the movement of the housing 10 can be braked.
  • the protective device 18 is partially formed by a motor control unit 22, via which the electric motor 12 can be braked when an uncontrolled blocking of the insert tool 16 is detected.
  • the engine control unit 22 is largely in one piece with an already existing power control unit 24 of the electric motor 12.
  • a pinion 28 which meshes with a spur gear 30 mounted on a bearing pin 44, is formed on an end of a shaft 26 of the electric motor 12 facing an axis of rotation of the insert tool 16.
  • a pinion 32 is formed, which meshes with a ring gear 36 arranged on a drilling spindle 34.
  • the tool holder 14 can be driven via the drilling spindle 34.
  • the motor control unit 22 actively brakes the electric motor 12 in such a way that electromagnetic table-generated forces of the electric motor 12 act against the direction of rotation of the shaft 26.
  • the motor control unit 22 is set or generates a braking torque m the large via the electric motor 12 so that the housing 10 or the hammer drill comes to a standstill after a swept angle range of less than 30 ° and a risk 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.
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 true EP1379362A1 (fr) 2004-01-14
EP1379362B1 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 (5)

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USD703017S1 (en) 2011-01-07 2014-04-22 Black & Decker Inc. Screwdriver
US9199362B2 (en) 2010-01-07 2015-12-01 Black & Decker Inc. Power tool having rotary input control
US9266178B2 (en) 2010-01-07 2016-02-23 Black & Decker Inc. Power tool having rotary input control
US9475180B2 (en) 2010-01-07 2016-10-25 Black & Decker Inc. Power tool having rotary input control
US10589413B2 (en) 2016-06-20 2020-03-17 Black & Decker Inc. Power tool with anti-kickback control system

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US7410006B2 (en) * 2004-10-20 2008-08-12 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor
US7552781B2 (en) 2004-10-20 2009-06-30 Black & Decker Inc. Power tool anti-kickback system with rotational rate sensor
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USD615838S1 (en) * 2009-09-02 2010-05-18 Robert Bosch Gmbh Hammer drill
JP5537122B2 (ja) * 2009-11-02 2014-07-02 株式会社マキタ 電動工具
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JP7144927B2 (ja) * 2017-10-23 2022-09-30 株式会社マキタ 回転工具
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WO2019177776A1 (fr) 2018-03-16 2019-09-19 Milwaukee Electric Tool Corporation Dispositif de filetage de tuyau
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US9211636B2 (en) 2010-01-07 2015-12-15 Black & Decker Inc. Power tool having rotary input control
US9266178B2 (en) 2010-01-07 2016-02-23 Black & Decker Inc. Power tool having rotary input control
US9321156B2 (en) 2010-01-07 2016-04-26 Black & Decker Inc. Power tool having rotary input control
US9321155B2 (en) 2010-01-07 2016-04-26 Black & Decker Inc. Power tool having switch and rotary input control
US9475180B2 (en) 2010-01-07 2016-10-25 Black & Decker Inc. Power tool having rotary input control
US10160049B2 (en) 2010-01-07 2018-12-25 Black & Decker Inc. Power tool having rotary input control
USD703017S1 (en) 2011-01-07 2014-04-22 Black & Decker Inc. Screwdriver
US10589413B2 (en) 2016-06-20 2020-03-17 Black & Decker Inc. Power tool with anti-kickback control system
US11192232B2 (en) 2016-06-20 2021-12-07 Black & Decker Inc. Power tool with anti-kickback control system

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DE10117121A1 (de) 2002-10-17
US7055620B2 (en) 2006-06-06
EP1379362B1 (fr) 2011-05-25
JP2004518551A (ja) 2004-06-24
CN1304172C (zh) 2007-03-14
WO2002081153A1 (fr) 2002-10-17
US20030116332A1 (en) 2003-06-26
CN1460046A (zh) 2003-12-03

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