WO2013072201A2 - Machine-outil portative électrique et procédé pour faire fonctionner une machine-outil portative électrique - Google Patents

Machine-outil portative électrique et procédé pour faire fonctionner une machine-outil portative électrique Download PDF

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Publication number
WO2013072201A2
WO2013072201A2 PCT/EP2012/071726 EP2012071726W WO2013072201A2 WO 2013072201 A2 WO2013072201 A2 WO 2013072201A2 EP 2012071726 W EP2012071726 W EP 2012071726W WO 2013072201 A2 WO2013072201 A2 WO 2013072201A2
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
hand tool
sensor device
drive motor
tool according
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.)
Ceased
Application number
PCT/EP2012/071726
Other languages
German (de)
English (en)
Other versions
WO2013072201A3 (fr
Inventor
Wolfgang Hirschburger
Sacha Felder
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 WO2013072201A2 publication Critical patent/WO2013072201A2/fr
Publication of WO2013072201A3 publication Critical patent/WO2013072201A3/fr
Anticipated expiration legal-status Critical
Ceased 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

Definitions

  • the present invention relates to a power tool with a housing in which a drive motor for driving an associated tool and an electrically conductively connected to the drive motor power supply are provided for providing a required operating the drive motor operating voltage.
  • the hand tool In a strong mechanical action on the power tool, for example, by a blow or a fall from a certain height, the hand tool can be damaged in terms of their electrical and / or mechanical operation, which could endanger a user in a further use of a correspondingly damaged hand tool.
  • both statutory and equipment manufacturers standards for ensuring sufficient mechanical stability of such a power tool for example by means of a trial by drop tests at the manufacturer known.
  • a disadvantage of the prior art is that despite compliance with such specified standards a blow or a fall from a certain drop height can lead to damage of such a power tool, z. B. by even stronger mechanical effects than those in the manufacturer-side drop tests occur so that a user could still be exposed to an undesirable hazard in a further use of a suitably damaged hand tool.
  • the invention relates to all hand-held or hand-held power tools that can assume potentially dangerous conditions in the loss of control by a user or user.
  • the loss of control can be consciously or unconsciously effected or brought about.
  • a power tool must continue to function after a free fall on a defined surface (drop height Im) and must not show any damage that could endanger the user. These conditions must be met both mechanically and electrically. This is therefore a deliberately induced loss of control of the power tool
  • the power tool is put out of operation in a drop test according to the invention, then at least the endangerment of a user is excluded. This is especially true when the device - according to the invention - then only by a specialist and not by the user can be activated again.
  • the hand tool can therefore only be repaired by skilled personnel after the inventive intervention in the drive train.
  • the device should be able to be released again after evaluation of the critical product components. If components are defective, they can be replaced by qualified personnel and the safe state of the device can be restored.
  • the term "permanent decommissioning" in the context of the present invention means a decommissioning from the time of interruption of the electrically conductive connection to the drive motor due to a detected mechanical action or a free fall or the like and a corresponding re-commissioning of the power tool by qualified personnel It is not possible for the user to put the device back into operation before it is restarted by an end user, to ensure that the functioning of the device is checked and, if necessary, restored. that the sensor device must be reset accordingly. This could be ensured, for example, with a corresponding data interface on the handheld power tool for importing software or a corresponding electronic signal, which is reserved for the specialist personnel.
  • An object of the invention is therefore to provide a hand tool machine, in which a risk to a corresponding user after damage to the power tool by a - especially deliberately induced - blow or - especially deliberately brought about - falling from a certain height drop are at least largely prevented can.
  • a hand tool with a housing in which a drive motor for driving an associated tool and an electrically conductively connectable to the drive motor connecting line for providing a required for operation of the drive motor operating voltage of a device internal or device external power supply are arranged.
  • a sensor device which is designed to effect a fulfillment of predetermined criteria, an interruption of the electrically conductive connection between the power supply and the drive motor to a permanent decommissioning of the power tool.
  • Decommissioning or "putting out of service” means in the case of a switched-on electric hand tool, switching off the device by a permanent interruption of the power supply.
  • switching off the device by a permanent interruption of the power supply In the case of an already switched off power tool, which has been disabled, for example, by the device on / off switch means the inventive “decommissioning” or the invention “put out of operation” a permanent interruption of the power supply regardless of the on / off switch of the device ,
  • the invention thus makes it possible to provide a handheld power tool with which a danger to a user after a mechanical action with a predetermined thickness on the handheld power tool can be reliably and reliably prevented. This is achieved, in particular, by transferring the handheld power tool according to the invention to a defined state, in particular to a defined electrical state, after detection of a critical situation.
  • Another object of the invention is to provide a hand tool machine in which a risk to a corresponding user can be at least largely prevented by an uncontrolled state of the device, for example, even in an accidental case.
  • the recognition of an uncontrolled state, in particular a free fall of the device is a prerequisite for an actuator intervention, which either disconnects the power tool from the power supply or activates other protection mechanisms.
  • a hand tool having a housing in which a drive motor for driving an associated tool and an electrically conductively connectable to the drive motor connecting line for providing a required for operation of the drive motor operating voltage of a device internal or device external power supply are arranged. It is provided a sensor device which is adapted to meet predetermined criteria for a loss of control of the power tool, the
  • Disable machine in particular to de-energize.
  • the sensor device preferably has a sensor unit and an electronic unit assigned to the sensor unit for checking the fulfillment of the predetermined criteria.
  • the sensor unit detects the change of physical parameters, such as the position, the speed or an acceleration of the machine tool.
  • the electronic unit performs a comparison between the, measured with the sensor unit, each currently present physical conditions and the predetermined criteria. If a physical quantity measured in this way, such as, for example, the acceleration of the device as a whole fulfills a specifiable criterion, then the actuators become effective and can, for example, be used to ...
  • decelerate the tool driven by the drive motor ... decouple the drive train, ie disconnect the drive from the output to reverse the direction of rotation of the drive.
  • the sensor device according to the invention makes it possible to bring about a clear definition of the electrical device state depending on the presence of predefinable criteria.
  • the sensor unit has, for example, a gravitational sensor or an, in particular multiaxial, acceleration sensor or else a pressure sensor, in particular an air pressure sensor.
  • this can be detected, for example, by a pressure sensor, in particular an air pressure sensor such as a barometric pressure sensor, since these sensors have a resolution of a few centimeters height difference and a case very quickly on the change of Can identify ambient air pressure.
  • a pressure sensor in particular an air pressure sensor such as a barometric pressure sensor, since these sensors have a resolution of a few centimeters height difference and a case very quickly on the change of Can identify ambient air pressure.
  • the sensor unit is associated with an additional power supply.
  • the sensor unit is associated with an additional power supply.
  • the predetermined criteria are preferably device-specific.
  • a sensor device can be provided which can be used in a variety of different hand tool machines, which can be provided for many different purposes and designed accordingly different, in particular with regard to stability and protection of their functionally relevant mechanical and electronic components.
  • the sensor device may be designed to determine the fulfillment of the predetermined criteria when detecting a shock against the housing. It is preferred that the beat has a determinable by the sensor device, predetermined impact strength.
  • an acceleration sensor in particular a micromechanical acceleration sensor and in particular a three-axis micromechanical acceleration sensor in the form of an ego, in particular a MEMS, can be used in an advantageous manner.
  • the criteria for decommissioning to be performed by the sensor device are preferably directed to detection and evaluation of such actions on the handheld power tool.
  • the sensor device is designed to determine the fulfillment of the predetermined criteria in a detection of a fall, ie a fall of the power tool.
  • the sensor device is in particular designed to determine the fulfillment of the predetermined criteria when detecting a fall, ie a fall of the handheld power tool over a predetermined height difference.
  • the connection between the motor and the power source is already interrupted during the fall.
  • the engine is advantageously already stopped.
  • a corresponding energization can be given to the motor, which decelerates it first, before the electrical connection line is interrupted.
  • the working means of the power tool has already come to a standstill or at least braked when the power tool hits the working means on the ground. This significantly reduces the risk of injury emanating from the falling power tool.
  • the sensor device may be designed to determine the fulfillment of the predetermined criteria upon detection of a fall of the housing. It is preferred that the falling has a determinable by the sensor device, predetermined height of fall or acceleration value.
  • a gravitational sensor in particular a micromechanical gravitational sensor in the form of an IC (or ME MS) can be used in an advantageous manner.
  • the sensor device is at least resettable to allow a restoration of an electrically conductive connection between the power supply and the drive motor for the re-commissioning of the power tool.
  • the effort for restarting the handheld power tool after a potential damage and subsequent automatic shutdown can advantageously be kept relatively low.
  • the sensors are designed as micromechanical sensors, such as MEMS (Microelectromechanical Systems). This allows a space and power-saving installation in the machine tool.
  • the sensor device is preferably fixed device-mounted in the housing of the power tool.
  • FIG. 1 is a schematic view of a hand tool according to an exemplary embodiment.
  • FIG. 1 shows a hand tool 100 having a housing 105 with a handle 115.
  • the handheld power tool 100 for mains-independent power supply of an associated drive motor 180 can be mechanically and electrically connected to a power supply 190, which is illustratively designed in the manner of a battery pack and serves to provide a required for operation of the drive motor 180 operating voltage.
  • the power tool 100 is exemplified as a cordless drill driver
  • the power supply 190 is illustratively realized by a battery pack.
  • cordless power tool hand tools such as a cordless screwdriver, a cordless hammer drill , a cordless angle grinder, a cordless saw.
  • cordless jigsaw or the like such as a cordless jigsaw or the like.
  • the present invention is not limited to hand-held power tools that can be operated independently of the mains, in particular battery-powered hand tool machines, but rather can also be used in hand-held power tools which can be operated depending on the network, ie hand tool with external power supply.
  • the invention relates to all hand-held or hand-held electric tools that can assume potentially dangerous conditions in the loss of control by a user or user.
  • a powered by the battery pack 190 with power, electric drive motor 180 and a transmission 200 are arranged.
  • the drive motor 180 is connected via the gear 200 with a drive shaft 120, z. B. a drive spindle connected.
  • the drive motor 180 is illustratively arranged in a motor housing 185 and the gear 200 in a gear housing 205, wherein the gear housing 205 and the motor housing 185 are arranged in the housing 105 by way of example.
  • the drive motor 180 is z. B. via a manual switch 195 actuated d. H. can be switched on and off, and can be any type of engine, eg. As an electronically commutated motor or a DC motor.
  • the drive motor 180 is so electronically controlled or controlled that both a reversing operation, as well as specifications with respect to a desired rotational speed can be realized.
  • the mode of operation and the design of a suitable drive motor are sufficiently known from the prior art, so that a detailed description of the description is omitted here for the purpose of conciseness of the description.
  • the transmission 200 is according to one embodiment with a different Gangg. Planet planet trained planetary gear, which is optionally associated with a torque clutch 199.
  • the transmission 200 is switchable via an associated actuating element 230 at least between a first and a second gear.
  • the planetary gear 200 is rotationally driven by the drive motor 180. It should be noted, however, that other transmissions may find application.
  • the gear 200 is associated with a tool holder 140, which has a drill chuck 145 by way of example.
  • This tool holder 140 serves to receive a tool 150 and can be integrally formed with the drive shaft 120 which can be driven by the drive motor 180 via the gear 200 or be connected to it in a tower-like manner.
  • the hand tool 100 has a in the
  • Housing 105 fixed to the device mounted sensor device 300 which is adapted to detect a mechanical action on the power tool 100, for example by a blow to the power tool 100 and / or by a fall of the power tool 100.
  • the sensor device 300 is configured to cause a permanent shutdown of the power tool by interrupting the electrically conductive connection 305 between the power supply 190 and the drive motor 180, if specified by the detected impact or fall, device-specific criteria are met.
  • the power supply would be external and would be transmitted to the device via an appropriate power cable.
  • the electrical connection to the mains cable would be interrupted by the sensor device inside the device.
  • a fulfillment of the predetermined criteria z. B. in a detection of a shock against the housing 105 are determined by the sensor device 300, if the impact z. B. a determinable by the sensor device 300, predetermined impact strength.
  • the sensor device 300 may be configured to determine the fulfillment of the predetermined criteria upon detection of a fall of the handheld power tool 100 over a predetermined height difference.
  • the predetermined height difference amounts to at least Im and in particular more than 2 m.
  • gravitational sensors or acceleration sensors or even barometric pressure sensors are used which make it possible for a case, in particular a free fall of the handheld power tool to detect in the gravitational field. These sensors are advantageously designed as M EMS and integrated in the sensor device 300.
  • the actuators can, for example, also ...
  • the drive motor can advantageously be actively slowed down first before the electrical connection line between the drive motor and power source is interrupted.
  • electrically or electronically commutated motors offer themselves as drive motors for this purpose.
  • the hand tool 100 After decommissioning by the sensor device 300, the hand tool 100 according to an embodiment by a corresponding user is no longer available for further operation and preferably without a review and, where appropriate, a repair to remedy resulting damage, eg. B. by a service technician or authorized personnel, no longer usable. Accordingly, the term "permanent decommissioning" In the context of the present invention, a shutdown would be excluded from the time the electrically conductive connection to the drive motor 180 was interrupted due to a detected mechanical action or free fall and a corresponding restart of the handheld power tool 100.
  • the sensor device 300 Prior to recommissioning the device by an end user, it must be ensured that the functionality of the device is checked and, if necessary, restored To enable such recommissioning of the handheld power tool 100 after a previous shutdown, the sensor device 300 may be interchangeable However, it is preferred that the sensor device 300 be replaced by the service technician or the hie For example, authorized personnel may be at least reset to allow the restoration of an electrically conductive connection between the power supply 190 and the drive motor 180 for restarting or restarting the power tool 100. According to one embodiment, the sensor device 300 has a sensor unit
  • the senor device 300 thus makes it possible to interrupt or also to close the electrical connection line 305 in dependence on the presence of special parameters and thus to interrupt or establish an electrically suffering connection between the power supply 190 and the drive motor 180.
  • the sensor unit 301 has z. B. on a gravitational sensor. It should be noted, however, that the present invention is not limited to gravitational sensors and other sensors may also be used, for example, single or multi-axis acceleration sensors or pressure sensors. By appropriate evaluation of the sensor signals, for example by combining the acceleration, speed and displacement signals in (all) three axes, it is advantageously possible to identify uncontrolled states of the power tool.
  • the sensor unit 301 is preferably assigned an additional power supply 303, for example a battery pack or batteries or else a high-capacitance capacitor. If the power supply 190 is designed in the manner of a battery pack, it may preferably be chargeable simultaneously with or from the battery pack 190.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

L'invention concerne une machine-outil portative (100) comportant un boîtier (105) dans lequel sont disposés un moteur d'entraînement (180) pour entraîner un outil correspondant (150) et une alimentation électrique (190) pouvant être connectée électriquement au moteur d'entraînement pour fournir une tension de fonctionnement nécessaire au fonctionnement du moteur d'entraînement (180). La machine-outil portative comporte également un dispositif de détection (300) conçu pour interrompre la connexion électrique entre l'alimentation électrique (190) et le moteur d'entraînement (180) pour une mise à l'arrêt durable de la machine-outil portative, lorsque certains critères sont remplis. L'invention concerne également un procédé pour faire fonctionner une telle machine-outil portative.
PCT/EP2012/071726 2011-11-17 2012-11-02 Machine-outil portative électrique et procédé pour faire fonctionner une machine-outil portative électrique Ceased WO2013072201A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102011086535.7 2011-11-17
DE102011086535 2011-11-17
DE201210217179 DE102012217179A1 (de) 2011-11-17 2012-09-24 Elektrische Handwerkzeugmaschine und Verfahren zum Betreiben einer elektrischen Handwerkzeugmaschine
DE102012217179.7 2012-09-24

Publications (2)

Publication Number Publication Date
WO2013072201A2 true WO2013072201A2 (fr) 2013-05-23
WO2013072201A3 WO2013072201A3 (fr) 2013-07-18

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Application Number Title Priority Date Filing Date
PCT/EP2012/071726 Ceased WO2013072201A2 (fr) 2011-11-17 2012-11-02 Machine-outil portative électrique et procédé pour faire fonctionner une machine-outil portative électrique

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Country Link
DE (1) DE102012217179A1 (fr)
WO (1) WO2013072201A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024145930A1 (fr) * 2023-01-06 2024-07-11 Techtronic Cordless Gp Détection de chute dans des outils électriques
US12090592B2 (en) 2021-06-15 2024-09-17 Milwaukee Electric Tool Corporation Drop detection in power tools
US12134155B2 (en) 2022-02-28 2024-11-05 Milwaukee Electric Tool Corporation Power tool including fall detection and autostop
US12611761B2 (en) 2021-11-24 2026-04-28 Milwaukee Electric Tool Corporation Grinder including enhanced sensing and component detection

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DE102013212635B4 (de) * 2013-06-28 2024-05-08 Robert Bosch Gmbh Handwerkzeugmaschine
DE102013212626B4 (de) * 2013-06-28 2024-08-08 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102013107294A1 (de) * 2013-07-10 2015-01-15 Gustav Klauke Gmbh Handarbeitsgerät und Hand-Aufweitgerät
DE202015104371U1 (de) 2015-08-18 2015-09-02 Kompernaß Handelsgesellschaft mbH Adapter für ein Elektrowerkzeug
DE102015217058A1 (de) * 2015-09-07 2017-03-09 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102015222817A1 (de) * 2015-11-19 2017-05-24 Robert Bosch Gmbh Elektrohandwerkzeugmaschine, Verfahren zum Betreiben
CN218452649U (zh) * 2019-12-20 2023-02-07 米沃奇电动工具公司 往复锯

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EP0771619B2 (fr) * 1995-11-02 2004-11-10 Robert Bosch Gmbh Procédé d'interruption de l'entraínement d'un outil à main et outil à main correspondant
DE102004046000B4 (de) * 2004-09-17 2016-07-21 C. & E. Fein Gmbh Elektrowerkzeug mit einem Lage- und Orientierungssystem
DE102007048052A1 (de) * 2007-10-05 2009-04-09 Daubner & Stommel GbR Bau-Werk-Planung (vertretungsberechtigter Gesellschafter: Matthias Stommel, 27777 Ganderkesee) Handwerkzeugmaschine sowie Verfahren zum Betreiben der Handwerkzeugmaschine
JP5214423B2 (ja) * 2008-12-10 2013-06-19 株式会社マキタ 電動工具
DE102009045942A1 (de) * 2009-10-23 2011-04-28 Robert Bosch Gmbh Handgehaltene Elektrowerkzeugmaschine
DE102009046789A1 (de) * 2009-11-17 2011-05-19 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12090592B2 (en) 2021-06-15 2024-09-17 Milwaukee Electric Tool Corporation Drop detection in power tools
US12611761B2 (en) 2021-11-24 2026-04-28 Milwaukee Electric Tool Corporation Grinder including enhanced sensing and component detection
US12134155B2 (en) 2022-02-28 2024-11-05 Milwaukee Electric Tool Corporation Power tool including fall detection and autostop
WO2024145930A1 (fr) * 2023-01-06 2024-07-11 Techtronic Cordless Gp Détection de chute dans des outils électriques

Also Published As

Publication number Publication date
WO2013072201A3 (fr) 2013-07-18
DE102012217179A1 (de) 2013-05-23

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