EP1684949B1 - Outil electrique a main - Google Patents

Outil electrique a main Download PDF

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Publication number
EP1684949B1
EP1684949B1 EP04786863A EP04786863A EP1684949B1 EP 1684949 B1 EP1684949 B1 EP 1684949B1 EP 04786863 A EP04786863 A EP 04786863A EP 04786863 A EP04786863 A EP 04786863A EP 1684949 B1 EP1684949 B1 EP 1684949B1
Authority
EP
European Patent Office
Prior art keywords
power tool
portable power
switching
tool according
blocking
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 - Fee Related
Application number
EP04786863A
Other languages
German (de)
English (en)
Other versions
EP1684949A1 (fr
Inventor
Gerhard Meixner
Markus Leupert
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 EP1684949A1 publication Critical patent/EP1684949A1/fr
Application granted granted Critical
Publication of EP1684949B1 publication Critical patent/EP1684949B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • An uncontrollable blocking case of a hand tool is when the plug-in 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 rotates uncontrollably at a certain angular velocity and over a certain angular range 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 controllable blocking case.
  • German Offenlegungsschrift DE 37 07 052 A1 discloses a hand tool machine with an electric motor arranged in a housing, via which an insert tool arranged in a tool holder can be driven in rotation.
  • the hand tool has a protective device with which a so-called uncontrollable blocking case of the insert tool can be detected via a sensor.
  • the rotary drive is interrupted by a clutch disposed in the drive train is automatically disengaged in response to an overload size, whereby the housing is blocked in its movement. By manually pressing an engagement plate, the clutch can be mechanically re-engaged directly by the engagement plate with a lever compresses a release spring of the clutch.
  • the invention is based on a hand 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 sensor unit uncontrollable blocking case of the insert tool recognizable and the housing is blockable in its movement, wherein the protective device comprises a mechanical unlocking unit, which is manually actuated by an operating force of an operator.
  • a transmission via an on / off means for actuating the unlocking unit is actuated.
  • the unlocking unit can be reliably solved when switching on the electric motor.
  • the operating force of the operator unlocks the protection device.
  • the unlocking therefore requires no complex electronic components and is particularly fail-safe.
  • mechanical components are inexpensive and do not require electrical power.
  • the protective device can be triggered in an uncontrollable blocking case and reset without special effort when switching on the power tool and re-activated. Compared to electrical or electronic systems, the function of the protection device is considerably simplified.
  • the mechanically actuatable unlocking unit can be combined with mechanical, electrical and electronic variants of sensor units and / or blocking units of a protective device.
  • the transmission may preferably be designed as a cam gear.
  • a lever mechanism may be provided or another, the expert appear appropriate gear.
  • the on / off means is designed as a pawl, which is actuated by the operator for switching on and off of the power tool.
  • the on / off means may be integrated into the hand tool so that it is triggered when pressing the tool or the power tool to a working surface.
  • the unlocking unit is automatically actuated when switching on the electric motor via the on / off means. Then the protection device can be reactivated without further action by the operator and is ready for immediate use. It is ensured that the electric motor only starts when the unlocking unit is released and the protective device is ready for use again.
  • the protective device of the power tool is easy to use.
  • the protective device comprises a mechanical sensor unit, this results in a further simplification of the system and a reduced susceptibility to interference.
  • the sensor unit has a return spring, which automatically re-activates and makes ready the sensor unit even after a blocking event when switching on the power tool.
  • the protective device comprises an electrical sensor unit. This allows the use of intelligent sensors in a mixed mechanical-electrical system with a purely mechanical so-called reset and an electrical sensor unit.
  • the protection device comprises a mechanical blocking unit
  • a purely mechanical protection device can be shown that works very reliably and allows a high level of operational safety.
  • the blocking unit has a rotatably mounted latching lever with a toothing provided for engagement in a blocking toothing at one end and an extension at the opposite end.
  • the blocking teeth can block a rotation of the housing in uncontrollable blocking case.
  • the protection device comprises an electrical blocking unit. This allows a structure of a mixed mechanical-electrical system with a purely mechanical so-called reset and an electrical blocking unit.
  • the unlocking unit has a switching rod whose one end is connected to an on / off means and whose other end is in operative connection with the blocking unit, the blocking unit can be actuated via the unlocking unit.
  • the shift rod is mounted longitudinally displaceable along the axis of rotation.
  • a movement of the on / off means in the longitudinal direction can be utilized for the actuation of the shift rod.
  • the shift rod on a switching lug and a switching cam whereby a triggered by an actuation of the on / off means movement in the longitudinal direction in an up-down movement with a first upper position and a second lower position can be implemented.
  • the shift rod With the up-down movement, the shift rod can occupy at least two different operating states for a case of blocking and unlocking the protection device.
  • the shift rod engages at one end with an actuating pin on the on / off means and at the other end with a connecting part in the extension of the locking lever.
  • the shift rod is in the upper position.
  • the shift rod assumes a neutral position, which remains without effect on the power tool. If a blocking case has occurred, this can also be maintained when releasing the on / off means and when switching off the electric motor.
  • Is when operating the on / off means the shift rod in the lower position movable and the locking lever from the blocking toothing, the locking teeth is unlocked without further action by the operator when switching on the electric motor and the protection device activated again.
  • the protection device is reset and activated, and then, when the movement is continued, the electric motor is switched on electrically. This ensures that the electric motor always runs only when the protection device is activated.
  • the coupling may be a mechanically or electrically operable coupling.
  • the electric motor and / or electrical components can be switched off in the event of a blockage, energy can be saved.
  • the electric motor is already switched off, and the operator can quickly put the hand tool machine back into operation. If the electric motor is switched off and an electric clutch is opened to interrupt the torque flow in the event of a lock, it can be ensured that the housing remains blocked in its movement.
  • Fig. 1 shows a hand tool with a arranged in a housing 10, not shown electric motor.
  • the electric motor drives a arranged in a tool holder 16 insert tool 12 rotating.
  • a protective device 54 With a trained as a pawl of an on-off switch on / off means 20 in a handle 18 of the power tool, a protective device 54 can be unlocked. If an uncontrollable blocking case occurs, there is a risk that the housing 10 will rotate about an axis of rotation 14.
  • an uncontrollable blocking case of the insertion tool 12 can be recognized via a sensor unit 22 and the housing 10 can be blocked in its movement; Preferably, the electric motor is switched off.
  • a preferred protection device 54 is shown in FIG.
  • a mechanical sensor unit 22 is operatively connected to a mechanical blocking unit 52.
  • a particularly preferred blocking unit 52 and the sensor unit 22 are described in the published patent application DE 43 00 021, the disclosure of which is expressly incorporated by reference. If the sensor unit 22 detects an uncontrollable blocking event, the sensor unit 22 triggers and activates a blocking unit 52.
  • the blocking unit 52 comprises a latching lever 28 which is spring-mounted and rotatably mounted and has a blocking toothing 26 at one end.
  • the locking lever 28 can perform an up-down movement by the rotatable mounting.
  • a lateral support may be provided to prevent lateral deflection of the locking lever 28.
  • the locking lever 28 is between blocking teeth 26 and storage with the sensor unit 22 in contact.
  • the locking lever 28 is provided with an extension 30, in which an unlocking unit 50 engages.
  • the unlocking unit 50 comprises a switching rod 34, which is fastened on an end facing away from the extension 30 with an actuating pin 38 on the switching-pawl formed on / off-means 20 and longitudinally displaceable along the axis of rotation 14 (FIG. 1). is stored.
  • the shift rod 34 engages with a connecting part 32 in the extension 30 and through an opening in the extension 30 through.
  • a shift lug 36 and a shift cam 40 are provided, whereby a triggered by an operation of the pawl formed on / off means 20 longitudinal movement in an up-down movement with a first upper position and a second lower position is feasible.
  • the switching nose 36 and the switching cam 40 are shown in Fig. 4 in detail view.
  • the sensor unit 22 is shown in FIG. 3 in a detailed view. The principle of operation is described in DE 43 00 021 A1, the content of which is incorporated by reference.
  • the blocking unit 52 rests with the latching lever 28 attached to the detent pawl 46 on the circumference of a disc 42 and can engage with this in a recess 56.
  • the distance between locking lever 28 and disc 42 is different, depending on whether the latch 46 rests on the circumference or in the recess 56.
  • the lateral support 48 prevents lateral deflection. In the position shown, the distance is large, and the locking lever 28 is pressed by the latch 46 upwards. Turns the disc 42 upon detection of a blocking case to the left, the latch 46 engages in the recess 56 of the disc 42 a.
  • the detent lever 28 moves down and the locking teeth 26 are activated.
  • Resetting and activating the protection device 54 is carried out as follows: If an uncontrollable blocking case has occurred and the switching pawl on / off means 20 is still pressed by the operator, but the electric motor is already switched off and the operator tries to turn on the power tool, he must first let go of the switching pawl formed on / off means 20. The thus initiated on-movement of the shift rod 34 in the upper position has no effect. The operator now takes the hand tool in his hands and turns the Hand tool machine. By the beginning of the switch-on movement, the shift rod 34 is pressed by the switching cam 40 down and lifted the teeth of the locking lever 28 from the blocking teeth 26. The return spring 24 brings the sensor unit 22 back into the starting position, and the protective device 54 is ready for operation again.
  • the electric motor is switched on, and the working process of the handheld power tool is continued. If an uncontrollable blocking event occurs again immediately, the protective device 54 can react again immediately.
  • a preferred hand tool machine is in particular a hammer drill or a percussion drill.
  • the protective device 54 is also suitable for other power tool machines with rotationally drivable insert tools, for example, angle and eccentric grinders, circular saws, chain saws and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Sawing (AREA)
  • Portable Power Tools In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (16)

  1. Machine-outil à main comportant dans un boîtier (10), un moteur électrique pouvant entraîner en rotation un outil d'usinage (12) dans un support d'outil (16), et un dispositif de protection qui permet de reconnaître un cas de blocage incontrôlable de l'outil d'usinage (12) par une unité de détection (22) et bloquer le boîtier (10) dans son mouvement, le dispositif de protection (54) comprenant une unité de déverrouillage mécanique (50) qu'on peut actionner manuellement par une force d'actionnement d'un opérateur,
    caractérisée en ce que
    pour actionner l'unité de déverrouillage (50), on actionne un engrenage par un moyen de marche/arrêt (20).
  2. Machine outil à main selon la revendication 1,
    caractérisée en ce que
    lors de la remise en marche du moteur électrique, l'unité de déverrouillage (50) est automatiquement actionnée par le moyen de marche/arrêt (20).
  3. Machine outil à main selon la revendication 1 ou 2,
    caractérisée en ce que
    le dispositif de protection (54) comprend une unité de capteur mécanique (22).
  4. Machine-outil à main selon la revendication 3,
    caractérisée en ce que
    l'unité de capteur (22) comprend un ressort de rappel (24).
  5. Machine-outil à main selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le dispositif de protection (54) comprend une unité de capteur électrique (22).
  6. Machine-outil à main selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le dispositif de protection (54) comprend une unité de blocage mécanique (52).
  7. Machine-outil à main selon la revendication 6,
    caractérisée en ce que
    l'unité de blocage (52) présente un levier à crans (28) pivotant dont une extrémité comporte une denture venant en prise dans une denture de blocage (26), et dont l'extrémité opposée comporte un prolongement (30)
  8. Machine-outil à main selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le dispositif de protection (54) comprend une unité de blocage électrique (52).
  9. Machine-outil à main selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'unité de déverrouillage (50) présente une tige de commutation (34) dont une extrémité est reliée à un moyen de marche/arrêt (20) et dont l'autre extrémité est en liaison active avec l'unité de blocage (52).
  10. Machine-outil à main selon la revendication 9,
    caractérisée en ce que
    la tige de commutation (34) est mobile le long de l'axe de rotation (14).
  11. Machine-outil à main selon la revendication 9 ou 10,
    caractérisée en ce que
    la tige de commutation (34) présente un ergot de contacteur (36) et une came de contact (40), permettant de convertir un mouvement longitudinal déclenché par un actionnement du moyen de marche/arrêt (20) en un mouvement ascendant/descendant avec une première position supérieure et une seconde position inférieure.
  12. Machine-outil à main selon l'une quelconque des revendications 9 à 11,
    caractérisée en ce que
    la tige de commutation (34) présente à une extrémité une tige d'actionnement (38) qui intervient sur le moyen de marche/arrêt (20), et à l'autre extrémité un élément de liaison qui pénètre dans le prolongement (30) du levier à crans (28).
  13. Machine-outil à main selon l'une quelconque des revendications précédentes 9 à 12,
    caractérisée en ce que
    la tige de commutation (34) se trouve dans la position supérieure lorsque le moteur électrique est arrêté et lorsque le moyen de marche/arrêt (20) est desserré.
  14. Machine-outil à main selon l'une quelconque des revendications précédentes 9 à 13,
    caractérisée en ce qu'
    en actionnant le moyen de marche/arrêt (20), on déplace la tige de commutateur (34) dans la position inférieure et on retire le levier à crans (28) de la denture de blocage (26).
  15. Machine-outil à main selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    pour bloquer le mouvement du boîtier (10), un embrayage interrompt un flux de couple de rotation.
  16. Machine-outil à main selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le moteur électrique et/ou les composants électriques (22, 54) en cas de blocage sont arrêtés.
EP04786863A 2003-11-13 2004-09-25 Outil electrique a main Expired - Fee Related EP1684949B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10353013A DE10353013A1 (de) 2003-11-13 2003-11-13 Handwerkzeugmaschine
PCT/DE2004/002148 WO2005046940A1 (fr) 2003-11-13 2004-09-25 Outil electrique a main

Publications (2)

Publication Number Publication Date
EP1684949A1 EP1684949A1 (fr) 2006-08-02
EP1684949B1 true EP1684949B1 (fr) 2007-05-02

Family

ID=34585044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04786863A Expired - Fee Related EP1684949B1 (fr) 2003-11-13 2004-09-25 Outil electrique a main

Country Status (6)

Country Link
US (1) US7306046B2 (fr)
EP (1) EP1684949B1 (fr)
JP (1) JP4215800B2 (fr)
CN (1) CN100515691C (fr)
DE (2) DE10353013A1 (fr)
WO (1) WO2005046940A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020209440A1 (de) 2020-07-27 2022-01-27 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrowerkzeug

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Publication number Priority date Publication date Assignee Title
DE10309012B3 (de) * 2003-03-01 2004-08-12 Hilti Ag Steuerverfahren einer axial schlagenden und drehenden Elektrohandwerkzeugmaschine
DE102005028918A1 (de) * 2005-06-22 2006-12-28 Wacker Construction Equipment Ag Bohr- und/oder Schlaghammer mit Leerlaufsteuerung
JP5537055B2 (ja) * 2009-03-24 2014-07-02 株式会社マキタ 電動工具
DE102010027981A1 (de) * 2010-04-20 2011-10-20 Robert Bosch Gmbh Winkelschleifer
DE102011080374A1 (de) * 2011-08-03 2013-02-07 Robert Bosch Gmbh Werkzeugmaschine
DE102011084432A1 (de) 2011-10-13 2013-04-18 Robert Bosch Gmbh Handwerkzeugmaschine mit mechanisch gesteuerter automatischer Ein- und Ausschaltfunktion
US9908182B2 (en) 2012-01-30 2018-03-06 Black & Decker Inc. Remote programming of a power tool
US9193055B2 (en) 2012-04-13 2015-11-24 Black & Decker Inc. Electronic clutch for power tool
US8919456B2 (en) 2012-06-08 2014-12-30 Black & Decker Inc. Fastener setting algorithm for drill driver
DE102012223007A1 (de) * 2012-12-13 2014-06-18 Hilti Aktiengesellschaft Handgeführtes oder halbstationäres Werkzeuggerät und Verfahren zum Betreiben eines derartigen Werkzeuggeräts
US11529725B2 (en) 2017-10-20 2022-12-20 Milwaukee Electric Tool Corporation Power tool including electromagnetic clutch
WO2019084280A1 (fr) 2017-10-26 2019-05-02 Milwaukee Electric Tool Corporation Procédés de commande du recul pour outils électriques
JP7213247B2 (ja) * 2017-11-23 2023-01-26 ペランク 電動工具のための制御装置、およびそのような制御装置を含む安全確保された工具
US11077509B2 (en) 2018-03-16 2021-08-03 Milwaukee Electric Tool Corporation Pipe threader
EP3792009B1 (fr) * 2019-09-12 2024-04-24 Andreas Stihl AG & Co. KG Appareil de travail portatif doté d'un outil
US11641102B2 (en) 2020-03-10 2023-05-02 Smart Wires Inc. Modular FACTS devices with external fault current protection within the same impedance injection module

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SE459240B (sv) 1982-05-10 1989-06-19 Mcculloch Corp Bromssystem foer kedjesaagar
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DE3707052A1 (de) 1987-03-05 1988-09-15 Bosch Gmbh Robert Verfahren zum unterbrechen der antriebstaetigkeit, insbesondere drehantriebstaetigkeit, einer handwerkzeugmaschine
DE4300021C2 (de) 1993-01-02 2001-11-29 Bosch Gmbh Robert Handwerkzeugmaschine mit Sicherheitsabschaltung bei blockierter Spindel
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020209440A1 (de) 2020-07-27 2022-01-27 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrowerkzeug
WO2022022960A1 (fr) 2020-07-27 2022-02-03 Robert Bosch Gmbh Outil électrique

Also Published As

Publication number Publication date
CN100515691C (zh) 2009-07-22
EP1684949A1 (fr) 2006-08-02
US7306046B2 (en) 2007-12-11
WO2005046940A1 (fr) 2005-05-26
DE10353013A1 (de) 2005-06-16
DE502004003723D1 (de) 2007-06-14
CN1878639A (zh) 2006-12-13
JP4215800B2 (ja) 2009-01-28
JP2006525875A (ja) 2006-11-16
US20060260831A1 (en) 2006-11-23

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