EP1008422A2 - Method and device for handheld machine tools to prevent accidents caused by tool blockage - Google Patents
Method and device for handheld machine tools to prevent accidents caused by tool blockage Download PDFInfo
- Publication number
- EP1008422A2 EP1008422A2 EP99811119A EP99811119A EP1008422A2 EP 1008422 A2 EP1008422 A2 EP 1008422A2 EP 99811119 A EP99811119 A EP 99811119A EP 99811119 A EP99811119 A EP 99811119A EP 1008422 A2 EP1008422 A2 EP 1008422A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- acceleration
- machine tool
- acceleration sensors
- axis
- 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
Links
Images
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
- 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
- B25D2250/221—Sensors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/13—Cutting by use of rotating axially moving tool with randomly-actuated stopping means
- Y10T408/14—Responsive to condition of Tool or tool-drive
Definitions
- the invention relates to a method and to the application of the Procedure based facility to prevent accidents by Tool blocking when working with hand-held machine tools rotating tool, especially with rotary hammers, with an interrupter device to interrupt the effect of the drive motor on the Tool depending on that supplied by a motion measuring device Rotational movement size detected operating state is equipped.
- an acceleration threshold - a clutch triggers the drivetrain between the drive motor and the actual tool unit, in particular the drilling spindle, interrupts.
- Difficulties with the two known, similar approaches arise from the fact that it is also in a desired operational use of the Machine, for example when working with a hammer drill in a concrete mass inhomogeneous composition for false tripping of the safety clutch is coming. This depends on the basic approach of an immediate Signal evaluation without a subsequent assessment together, i.e. a signal evaluation with necessarily a comparatively low security threshold without individual assessment of the respective accident.
- the invention is therefore based on the object, hand-held machine tools to improve the type mentioned so that a Blocking of the tool by the reaction impulse or the reaction moment A measurement signal triggered by the motion sensor is then also an unambiguous one Provides information about a dangerous blocking case if the axis of rotation of the tool is distorted in the event of a malfunction, with the influencing variable simultaneously Acceleration to gravity on the measurement signal should be switched off.
- the invention is in a method for preventing accidents Tool blocking when working with hand-held machine tools rotating tool, especially with rotary hammers, with an interrupter device to interrupt the effect of the drive motor on the Tool depending on that by a motion measuring device supplied inventory is equipped, characterized in that the movement of the machine tool at least two spatially apart and against the axis of rotation in normal operation of the Tool spaced points of the machine tool is measured, and that the measured values obtained before further processing and evaluation be subtracted from each other.
- a facility to prevent rotational accidents due to Tool blocking in a hand-held machine tool with rotating Tool is characterized in that at least two acceleration sensors, preferably - in particular from Cost reasons - linear acceleration sensors as torsion sensors within of the housing of the machine tool on spatially from each other and opposite the tool axis preferably differently spaced locations are mounted and that the electronic evaluation unit has a subtraction level contains in which the signals delivered by the acceleration sensors before calculating one intended to trigger the interrupter device Signal are subtracted from each other.
- the one of the several Acceleration sensors each delivered signals before calculating the expected and predeterminable angle of rotation of the machine tool from each other be subtracted.
- FIG. 1A / B and FIG. 2 show the essentials in a basic illustration Components of a hand-guided in the context of the invention
- Machine tool M its operating state by means of two acceleration sensors 1a or lb is monitored.
- Fig. 1B is indicated by arrows indicated which acceleration 10 or deflection force in which deflection direction 11 on the machine tool in case of blocking of the tool 8 act.
- the signals from the acceleration sensors 1a, 1b arrive an electronic evaluation unit 3, which is a microprocessor, one in discrete Circuit technology implemented microcomputer, a signal processor or the like can be.
- the digitized signals are in this evaluation unit 3 of the acceleration sensors 1a, 1b are first subtracted from one another, such as explained and justified further below. Then the so obtained Result evaluated using a model or rule-based algorithm, which the operating state of the hand machine tool M when the Acceleration sensors 1a, 1b predicts.
- the invention can be also be used advantageously for those applications in which there are no predictive ones Calculation of the expected twist angle of the hand machine tool M takes place, that is to say in the case of those safety devices that do so Assess acceleration signal generated by tool blocking immediately and when a certain level is exceeded, possibly after interference signal filtering, as well as one and / or two integration, directly to trigger the Use drive interrupter device.
- the method according to the invention and the measuring system based thereon have an effect reliable for any rotation axis of the overall system as well as for if necessary, tilted or warped tool axis, as below under 3 is explained.
- the movement measuring device has at least two Acceleration sensors 1a, 1b, whose measurement results according to the invention subtracted from further processing.
- the disturbance Gravitational acceleration for every possible application position of the power tool eliminated.
- the second sensor 1b in a axis 9 including the axis of rotation in normal operation Level lies.
- the axis of rotation can be assumed to be two-dimensional Take any position and always delivers error-corrected signal, as derived from the following mathematical derivation reveals.
- more than two sensors can also be provided be, then by averaging or a plausibility check the reliability of the signal obtained is increased. If two redundant sensor pairs are provided, the intervals for one Security check to be stretched in principle.
- Equation (3) used in equation (1) in conjunction with equation (2) yields:
- Equation (3 ') inserted in equation (1') in conjunction with equation (2 ') gives:
- any measuring system is suitable within the scope of the invention
- Acceleration sensors or accelerometers i.e. those that are based on piezoelectric, piezoresistive or inertial and / or integrated as Part of a microelectronic circuit are realized.
- the electronic Evaluation unit can either be implemented analogously with the help of Operational amplifiers and corresponding filter circuits or digital using a microprocessor with associated processor interfaces (see DE 43 44 817 C2). It is also possible to use the evaluation unit to realize as fuzzy logic, which is detailed in DE 196 41 618 A1 is described.
- any known measurement method for acceleration, angular velocity or Angle of rotation applicable is mainly from Cost reasons based on linear acceleration sensors, for example referred to piezoelectric measurement methods.
- linear acceleration sensors for example referred to piezoelectric measurement methods.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Drilling And Boring (AREA)
- Portable Power Tools In General (AREA)
- Numerical Control (AREA)
- Manipulator (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren sowie eine auf der Anwendung des Verfahrens beruhende Einrichtung zur Vermeidung von Unfällen durch Werkzeugblockieren beim Arbeiten mit handgeführten Werkzeugmaschinen mit rotierendem Werkzeug, insbesondere bei Bohrhämmern, die mit einer Unterbrechereinrichtung zum Unterbrechen der Wirkung des Antriebsmotors auf das Werkzeug in Abhängigkeit von dem durch eine Bewegungsmeßeinrichtung gelieferten Drehbewegungsgröße erfaßten Betriebszustand ausgerüstet ist.The invention relates to a method and to the application of the Procedure based facility to prevent accidents by Tool blocking when working with hand-held machine tools rotating tool, especially with rotary hammers, with an interrupter device to interrupt the effect of the drive motor on the Tool depending on that supplied by a motion measuring device Rotational movement size detected operating state is equipped.
Rotationsunfälle, also insbesondere Verletzungen im Bereich des Handgelenks oder Arms oder der Sturz von Leitern, Gerüsten usw., bedingt durch das plötzliche Blockieren des Werkzeugs und das damit verbundene schnelle Ansteigen des Reaktionsmoments bei handgeführten Werkzeugmaschinen, insbesondere solchen größerer Leistung, wie Bohrhämmern, sind ein lange erkanntes und viel diskutiertes Problem. Aus der Vielzahl der bekannten Lösungsansätze für dieses Problem sei nur beispielhaft auf die Druckschriften EP 150 669 A2 sowie auf WO 88/06508 A3 hingewiesen. Durch die Verwendung eines innerhalb des oder am Gehäuse der Werkzeugmaschine angeordneten Verdrehsensors, insbesondere eines Beschleunigungssensors, der die Beschleunigung einer äußeren Schwenkbewegung der handgeführten Werkzeugmaschine erfaßt, wird - gegebenenfalls in Abhängigkeit von verschiedenen Vorgabe-Kriterien, z.B. eines Beschleunigungs-Schwellenwerts - eine Schaltkupplung auslöst, die den Antriebsstrang zwischen dem Antriebsmotor und dem eigentlichen Werkzeugaggregat, insbesondere der Bohrspindel, unterbricht. Schwierigkeiten bei den beiden bekannten, im Ansatz ähnlichen Lösungen, ergeben sich daraus, daß es auch bei einer gewünschten Betriebsnutzung der Maschine, etwa beim Arbeiten mit einem Bohrhammer in einer Betonmasse inhomogener Zusammensetzung zu Fehlauslösungen der Sicherheitskupplung kommt. Dies hängt mit dem grundsätzlichen Lösungsansatz einer unmittelbaren Signalauswertung ohne Folgeabschätzung zusammen, d.h., einer Signalauswertung mit notwendigerweise vergleichsweise niedriger Sicherheitsschwelle ohne individuelle Bewertung des jeweiligen Störfalls.Rotational accidents, in particular injuries to the wrist or arms or the fall of ladders, scaffolding, etc. due to the sudden blockage of the tool and the associated rapid Increase in reaction torque for hand-held machine tools, especially those of higher performance, such as hammer drills, are long recognized and much discussed problem. From the multitude of known ones Approaches to solving this problem are only exemplary of the publications EP 150 669 A2 and WO 88/06508 A3. By using it one arranged inside or on the housing of the machine tool Twist sensor, in particular an acceleration sensor that the Acceleration of an external swiveling movement of the hand-held machine tool is recorded - possibly depending on various default criteria, e.g. an acceleration threshold - a clutch triggers the drivetrain between the drive motor and the actual tool unit, in particular the drilling spindle, interrupts. Difficulties with the two known, similar approaches arise from the fact that it is also in a desired operational use of the Machine, for example when working with a hammer drill in a concrete mass inhomogeneous composition for false tripping of the safety clutch is coming. This depends on the basic approach of an immediate Signal evaluation without a subsequent assessment together, i.e. a signal evaluation with necessarily a comparatively low security threshold without individual assessment of the respective accident.
Eine wesentliche Verbesserung wurde mit einem vorausschauenden Bewertungsverfahren für die von einem Beschleunigungssensor gelieferten Signale erreicht, wie es in der Patentschrift DE 43 44 817 C2 beschrieben ist. Diesem verbesserten Verfahren liegt der Gedanke zugrunde, unter Vorgabe einer Zeitkonstante aus der vom Beschleunigungssensor gelieferten Drehbewegungsgröße einen aufgrund des Reaktionsmoments beim Blockieren oder teilweisem Blockieren des Werkzeugs zu erwartenden Verdrehwinkel der Werkzeugmaschine vorausschauend zu berechnen und die Sicherheitskupplung dann zu aktivieren, wenn der berechnete zu erwartende Verdrehwinkel einen vorgebbaren maximal zulässigen Verdrehwinkel überschreiten würde. Dabei wird das zukünftige Verhalten der Maschine unmittelbar nach Auftreten eines Störfalls bewertet und eine Gegenmaßnahme ausgelöst, wenn die Werkzeugmaschine mit einem Drehimpuls beaufschlagt worden ist, durch den sich ein Unfall nicht mehr vermeiden läßt.A major improvement was made with a predictive assessment process for the signals delivered by an acceleration sensor, as described in the patent DE 43 44 817 C2. This improved The process is based on the idea of specifying a time constant based on the amount of rotary motion supplied by the acceleration sensor of the reaction torque when blocking or partially blocking the Predicting the tool's expected torsion angle to calculate and then activate the safety clutch when the calculated twist angle to be expected a specifiable maximum permissible Angle of rotation would exceed. The future behavior of the Machine evaluated immediately after an accident and a countermeasure triggered when the machine tool with an angular momentum has been acted on, by which an accident can no longer be avoided.
Dem für die Praxis solcher handgeführter Werkzeugmaschinen vielversprechenden
Lösungsansatz gemäß der genannten DE-Druckschrift haften jedoch noch
zwei wesentliche, bei Versuchsreihen festgestellte, Probleme an:
Der Erfindung liegt damit die Aufgabe zugrunde, handgeführte Werkzeugmaschinen der eingangs genannten Art so zu verbessern, daß ein beim Blockieren des Werkzeugs durch den Reaktionsimpuls oder das Reaktionsmoment über den Bewegungssensor ausgelöstes Meßsignal auch dann eine eindeutige Aussage über einen gefährlichen Blockierfall liefert, wenn die Rotationsachse des Werkzeugs im Störfall verzogen ist, wobei gleichzeitig die Einflußgröße Erdbeschleunigung auf das Meßsignal ausgeschaltet werden soll.The invention is therefore based on the object, hand-held machine tools to improve the type mentioned so that a Blocking of the tool by the reaction impulse or the reaction moment A measurement signal triggered by the motion sensor is then also an unambiguous one Provides information about a dangerous blocking case if the axis of rotation of the tool is distorted in the event of a malfunction, with the influencing variable simultaneously Acceleration to gravity on the measurement signal should be switched off.
Die Erfindung ist bei einem Verfahren zur Vermeidung von Unfällen durch Werkzeugblockieren beim Arbeiten mit handgeführten Werkzeugmaschinen mit rotierendem Werkzeug, insbesondere bei Bohrhämmern, die mit einer Unterbrechereinrichtung zum Unterbrechen der Wirkung des Antriebsmotors auf das Werkzeug in Abhängigkeit von dem durch eine Bewegungsmeßeinrichtung gelieferten Drehbewegungsgröße erfaßten Betriebsbestand ausgerüstet ist, dadurch gekennzeichnet, daß die Bewegung der Werkzeugmaschine an mindestens zwei räumlich voneinander und gegen die Drehachse im Normalbetrieb des Werkzeugs beabstandeten Stellen der Werkzeugmaschine gemessen wird, und daß die erhaltenen Meßwerte vor einer weiteren Verarbeitung und Bewertung voneinander subtrahiert werden.The invention is in a method for preventing accidents Tool blocking when working with hand-held machine tools rotating tool, especially with rotary hammers, with an interrupter device to interrupt the effect of the drive motor on the Tool depending on that by a motion measuring device supplied inventory is equipped, characterized in that the movement of the machine tool at least two spatially apart and against the axis of rotation in normal operation of the Tool spaced points of the machine tool is measured, and that the measured values obtained before further processing and evaluation be subtracted from each other.
Eine Einrichtung zur Vermeidung von Rotationsunfällen aufgrund von Werkzeugblockieren bei einer handgeführten Werkzeugmaschine mit rotierendem Werkzeug gemäß der oben erläuterten Gattung ist dadurch gekennzeichnet, daß mindestens zwei Beschleunigungssensoren, vorzugsweise - insbesondere aus Kostengründen - Linear-Beschleunigungssensoren als Verdrehsensoren innerhalb des Gehäuses der Werkzeugmaschine an räumlich voneinander und gegenüber der Werkzeugachse vorzugsweise unterschiedlich beabstandeten Stellen montiert sind und daß die elektronische Auswerteeinheit eine Subtraktionsstufe enthält, in der die von den Beschleunigungssensoren jeweils gelieferten Signale vor der Errechnung eines zur Auslösung der Unterbrechereinrichtung bestimmten Signals voneinander subtrahiert werden.A facility to prevent rotational accidents due to Tool blocking in a hand-held machine tool with rotating Tool according to the type described above is characterized in that at least two acceleration sensors, preferably - in particular from Cost reasons - linear acceleration sensors as torsion sensors within of the housing of the machine tool on spatially from each other and opposite the tool axis preferably differently spaced locations are mounted and that the electronic evaluation unit has a subtraction level contains in which the signals delivered by the acceleration sensors before calculating one intended to trigger the interrupter device Signal are subtracted from each other.
Vorteilhafte Ergänzungen und Ausführungsarten für das erfindungsgemäße Verfahren und die darauf basierende Einrichtung sind Inhalt von jeweils abhängigen Patentansprüchen.Advantageous additions and designs for the inventive Procedures and the facility based on them are the content of each dependent claims.
Vorzugsweise und insbesondere stellt das erfindungsgemäße Verfahren und die darauf beruhende Sicherheitseinrichtung eine Verbesserung der in der genannten DE-Druckschrift beschriebenen Lösung dar, wobei die von den mehreren Beschleunigungssensoren jeweils gelieferten Signale vor der Errechnung des zu erwartenden und vorgebbaren Verdrehwinkels der Werkzeugmaschine voneinander subtrahiert werden.Preferably and in particular the method according to the invention and the safety device based thereon an improvement in the mentioned DE document described solution, the one of the several Acceleration sensors each delivered signals before calculating the expected and predeterminable angle of rotation of the machine tool from each other be subtracted.
Hinsichtlich der Berechnung des zu erwartenden Verdrehwinkels, der Reduzierung oder Beseitigung nieder- bzw. hochfrequenter Störungen sowie der geeigneten mathematischen Prinzipien und Algorithmen für die zuverlässige vorausschauende Berechnung des zu erwartenden kritischen Verdrehwinkels wird wiederum auf DE 43 44 817 C2 verwiesen werden.With regard to the calculation of the expected twist angle, the reduction or elimination of low or high frequency interference as well as the appropriate mathematical principles and algorithms for reliable predictive Calculation of the critical twist angle to be expected again refer to DE 43 44 817 C2.
Die Erfindung und vorteilhafte Einzelheiten werden nachfolgend unter Bezug auf die Zeichnung in einer beispielsweisen Ausführungsform näher erläutert. Es zeigen:
- Fig. 1A bzw. 1B
- die schematische Darstellung eines Bohrhammers in Seiten- bzw. Rückansicht als Beispiel für eine handgeführte Werkzeugmaschine, die mit zwei Beschleunigungssensoren ausgerüstet ist;
- Fig. 2
- die schematische Teilschnittdarstellung des Bohrhammers nach Fig. 1; und
- Fig. 3
- die Prinzipdarstellung eines Drehbewegungsmodells für eine Handwerkzeugmaschine gemäß Fig. 1, die im dargestellten Beispiel mit zwei Linear-Beschleunigungssensoren ausgerüstet ist.
- 1A and 1B
- the schematic representation of a rotary hammer in side or rear view as an example of a hand-held machine tool which is equipped with two acceleration sensors;
- Fig. 2
- the schematic partial sectional view of the hammer drill according to Fig. 1; and
- Fig. 3
- the basic representation of a rotary motion model for a hand tool according to FIG. 1, which is equipped in the example shown with two linear acceleration sensors.
Die Fig. 1A/B und die Fig. 2 zeigen in einer Prinzipdarstellung die wesentlichen
im Zusammenhang mit der Erfindung interessierenden Bauteile einer handgeführten
Werkzeugmaschine M, deren Betriebszustand mittels zweier Beschleunigungssensoren
1a bzw. lb überwacht wird. In Fig. 1B ist durch Hinweispfeile
angedeutet, welche Beschleunigung 10 bzw. Auslenkkraft in welcher Auslenkrichtung
11 auf die Werkzeugmaschine im Falle des Blockierens des Werkzeugs
8 wirken. Über eine Eingangsschnittstelle 2 zur Signalformung, A/D-Wandlung,
usw., gelangen die Signale der Beschleunigungssensoren 1a, 1b zu
einer elektronischen Auswerteeinheit 3, die ein Mikroprozessor, ein in diskreter
Schaltkreistechnik ausgeführter Mikrorechner, ein Signalprozessor oder ähnliches
sein kann. In dieser Auswerteeinheit 3 werden die digitalisierten Signale
der Beschleunigungssensoren 1a, 1b zunächst voneinander subtrahiert, wie
weiter unten näher erläutert und begründet. Anschließend wird das so erhaltene
Ergebnis über einen modell- oder regelbasierten Algorithmus ausgewertet,
welcher den Betriebszustand der Handwerkzeugmaschine M bei Ansprechen der
Beschleunigungssensoren 1a, 1b voraussagt. Die Erfindung läßt sich jedoch
auch für solche Anwendungsfälle vorteilhaft einsetzen, bei denen keine vorausschauende
Berechnung des zu erwartenden Verdrehwinkels der Handwerkzeugmaschine
M erfolgt, also bei solchen Sicherheitseinrichtungen, die das aufgrund
von Werkzeugblockieren erzeugte Beschleunigungssignal unmittelbar bewerten
und bei Überschreiten eines bestimmten Pegels, gegebenenfalls nach Störsignalfilterung,
sowie ein- und/oder zweimaliger Integration, direkt zur Auslösung der
Antriebs-Unterbrechereinrichtung nutzen.1A / B and FIG. 2 show the essentials in a basic illustration
Components of a hand-guided in the context of the invention
Machine tool M, its operating state by means of two
Wird eine Beschleunigung durch Werkzeugblockieren detektiert, die von der
Auswerteeinheit 3 als "gefährlich" eingestuft wird, so wird über eine Ausgabeschnittstelle
4 die Betriebsunterbrechungseinrichtung, also insbesondere eine
Kupplung 5 betätigt, die den Antriebsstrang zwischen einem Antriebsmotor 7
und dem Werkzeughalter bzw. Werkzeug 8 unterbricht und gegebenenfalls
zusätzlich einen Stromunterbrecher 6 auslöst.If an acceleration is detected by tool blocking, which is caused by the
Evaluation unit 3 is classified as "dangerous", so is via an output interface
4 the operating interruption device, in particular one
Clutch 5 actuates the drive train between a drive motor 7
and the tool holder or
Das erfindungsgemäße Verfahren und das darauf basierende Meßsystem wirkt zuverlässig für jede beliebige Rotationsachse des Gesamtsystems sowie bei gegebenenfalls gekippter oder verzogener Werkzeugachse, wie nachfolgend unter Bezug auf Fig. 3 erläutert wird.The method according to the invention and the measuring system based thereon have an effect reliable for any rotation axis of the overall system as well as for if necessary, tilted or warped tool axis, as below under 3 is explained.
Die Bewegungsmeßeinrichtung weist, wie bereits erwähnt, wenigstens zwei
Beschleunigungssensoren 1a, 1b auf, deren Meßergebnisse erfindungsgemäß vor
einer weiteren Verarbeitung subtrahiert werden. Wie sich aus der nachfolgenden
Herleitung für zwei mögliche Anwendungsfälle ersehen läßt, wird die Störgröße
Erdbeschleunigung für jede mögliche Anwendungsposition des Elektrowerkzeugs
eliminiert.As already mentioned, the movement measuring device has at least two
Bei der Beschleunigungsmeßeinrichtung 1 gemäß Fig. 3 ist vorgesehen, daß der
zweite Sensor 1b in einer die Drehachse 9 im Normalbetrieb einschließenden
Ebene liegt. Die Drehachse kann jedoch bei einer angenommenen zweidimensionalen
Sensorebene jede beliebige Position einnehmen und liefert immer ein
fehlerbereinigtes Signal, wie sich aus der nachfolgenden mathematischen Herleitung
erkennen läßt. Auch können prinzipiell mehr als zwei Sensoren vorgesehen
werden, wobei dann durch Mittelwertbildung oder eine Plausibilitätsüberprüfung
die Zuverlässigkeit des erhaltenen Signals gesteigert wird. Sofern zwei
redundante Sensorpaare vorgesehen werden, können die Intervalle für eine
Sicherheitsüberprüfung prinzipiell gestreckt werden.3 it is provided that the
Die in Fig. 3 angegebenen Größen bezeichnen folgendes:
- a1, a2 =
- Meßsignale des
ersten Beschleunigungssensor 1a bzw. deszweiten Beschleunigungssensors 1b; insbesondere repräsentieren a1 und a2 lineare Tangentialbeschleunigungen um jeweilige Drehachsen, die nachfolgend als "Fall 1" bzw. als "Fall 2" einer näheren Betrachtung unterzogen werden. - d =
- Abstand der
1a, 1b;Beschleunigungssensoren - r1a1, r1b1 =
- Abstände der
1a, 1b für den "Beschleunigungssensoren Fall 1", bei dem die (gedachte) Drehachse des Werkzeugs, beispielsweise im Fall des Werkzeugblockierens gegenüber der Antriebsachse bzw. Drehachse im Normalbetrieb nach unten versetzt ist; und - r1a2, r1b2 =
- Abstände der
1a, 1b von einer (gedachten) Drehachse für den "Fall 2", d.h., wenn die Drehachse des Werkzeugs im Falle des Blockierens gegenüber der Antriebsachse bzw. Drehachse im Normalbetrieb nach oben versetzt ist;Beschleunigungssensoren - ϕ =
- zu erwartender Drehwinkel im Falle des Werkzeugblockierens.
- a 1 , a 2 =
- Measuring signals of the
first acceleration sensor 1a and thesecond acceleration sensor 1b; in particular, a 1 and a 2 represent linear tangential accelerations about respective axes of rotation, which are subsequently examined in more detail as "case 1" and "case 2". - d =
- Distance of the
1a, 1b;acceleration sensors - r 1a1 , r 1b1 =
- Distances of the
1a, 1b for "acceleration sensors case 1", in which the (imaginary) axis of rotation of the tool, for example in the case of tool blocking, is offset downward from the drive axis or axis of rotation in normal operation; and - r 1a2 , r 1b2 =
- Distances of the
1a, 1b from an (imaginary) axis of rotation for "acceleration sensors case 2", that is to say when the axis of rotation of the tool is offset upwards in the event of blocking relative to the drive axis or axis of rotation in normal operation; - ϕ =
- expected angle of rotation in the event of tool blocking.
Mathematische Herleitung zu "Fall 1":
Gleichung (3) eingesetzt in Gleichung (1) in Verbindung mit Gleichung (2) ergibt: Equation (3) used in equation (1) in conjunction with equation (2) yields:
Ersichtlicherweise ist der Wert nicht mehr abhängig von der Erdbeschleunigung, da der Anteil der Erdbeschleunigung in beiden Beschleunigungssensorsignalen a1 bzw. a2 in gleicher Größe vorhanden ist, wie sich aus Gleichung (4) ersehen läßt, also vollständig kompensiert wird. Obviously the value no longer depends on the acceleration due to gravity, since the proportion of the acceleration due to gravity is present in the same magnitude in both acceleration sensor signals a 1 and a 2 , as can be seen from equation (4), that is to say is completely compensated for.
Mathematische Herleitung für den "Fall 2":
Gleichung (3') eingesetzt in Gleichung (1') in Verbindung mit Gleichung (2') ergibt: Equation (3 ') inserted in equation (1') in conjunction with equation (2 ') gives:
Auch für den "Fall 2" gilt also, daß der für die Signalauswertung zur Verfügung
stehende Wert des Meßsignals, also die Drehbeschleunigung, nicht mehr abhängig
ist von der für beide Beschleunigungssensoren gleichen Massenanziehung
bzw. der Erdbeschleunigung.So also for "
Im Rahmen der Erfindung eignet sich prinzipiell jedes Meßsystem mit Beschleunigungssensoren oder Beschleunigungsaufnehmern, also solche, die piezoelektrisch, piezoresistiv oder inertial basiert sind und/oder integriert als Teil einer mikroelektronischen Schaltung realisiert sind. Die elektronische Auswerteeinheit kann entweder analog realisiert sein mit Hilfe von Operationsverstärkern und entsprechenden Filterschaltkreisen oder digital unter Verwendung eines Mikroprozessors mit zugeordneten Prozessorschnittstellen (vergleiche DE 43 44 817 C2). Ebenso möglich ist es, die Auswerteeinheit als Fuzzy-Logik zu realisieren, was in DE 196 41 618 A1 ausführlich beschrieben ist.In principle, any measuring system is suitable within the scope of the invention Acceleration sensors or accelerometers, i.e. those that are based on piezoelectric, piezoresistive or inertial and / or integrated as Part of a microelectronic circuit are realized. The electronic Evaluation unit can either be implemented analogously with the help of Operational amplifiers and corresponding filter circuits or digital using a microprocessor with associated processor interfaces (see DE 43 44 817 C2). It is also possible to use the evaluation unit to realize as fuzzy logic, which is detailed in DE 196 41 618 A1 is described.
Zur Verwirklichung des der Erfindung zugrundeliegenden Prinzips ist prinzipiell jedes bekannte Meßverfahren für Beschleunigung, Winkelgeschwindigkeit bzw. Drehwinkel anwendbar. Im obigen Ausführungsbeispiel wird vor allem aus Kostengründen auf Linearbeschleunigungssensoren, beispielsweise basierend auf piezoelektrischen Meßverfahren Bezug genommen. Prinzipiell eignen sich jedoch auch Impulsrad- und magnetische Winkelschrittgeber, mikromechanische Beschleunigungssensoren, optische Meßverfahren, magnetohydrodynamische Meßverfahren, Drehbeschleunigungsmeßverfahren nach dem Ferraris-Prinzip, kapazitive Meßverfahren oder auch DMS-Beschleunigungsaufnehmer.In order to implement the principle on which the invention is based, it is in principle any known measurement method for acceleration, angular velocity or Angle of rotation applicable. In the above embodiment, is mainly from Cost reasons based on linear acceleration sensors, for example referred to piezoelectric measurement methods. In principle, are suitable however also pulse wheel and magnetic angle stepper, micromechanical Accelerometers, optical measurement methods, magnetohydrodynamic Measuring method, rotational acceleration measuring method according to the Ferraris principle, capacitive measuring methods or strain gauge accelerometers.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19857061A DE19857061C2 (en) | 1998-12-10 | 1998-12-10 | Method and device for avoiding accidents in hand-held machine tools due to tool blocking |
DE19857061 | 1998-12-10 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1008422A2 true EP1008422A2 (en) | 2000-06-14 |
EP1008422A3 EP1008422A3 (en) | 2001-09-19 |
EP1008422B1 EP1008422B1 (en) | 2007-02-14 |
Family
ID=7890654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99811119A Expired - Lifetime EP1008422B1 (en) | 1998-12-10 | 1999-12-06 | Method and device for handheld machine tools to prevent accidents caused by tool blockage |
Country Status (5)
Country | Link |
---|---|
US (1) | US6111515A (en) |
EP (1) | EP1008422B1 (en) |
JP (1) | JP4486728B2 (en) |
CN (1) | CN1160526C (en) |
DE (2) | DE19857061C2 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1227561A2 (en) | 2001-01-24 | 2002-07-31 | HILTI Aktiengesellschaft | Rotatable electric hand tool with starting security system |
DE10309414A1 (en) * | 2003-03-05 | 2004-09-23 | Robert Bosch Gmbh | Sensor device for detecting jamming of power tool, especially percussion drill, uses single motion sensor to measure degrees of movement along two sensor axes |
EP1714723A2 (en) * | 2005-04-19 | 2006-10-25 | Black & Decker, Inc. | Electric clutch for tool chuck with power take off and dead spindle features |
EP2581168A1 (en) * | 2011-10-13 | 2013-04-17 | Oy Kwh Mirka Ab | Handheld machine |
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 |
EP2656977A3 (en) * | 2012-04-26 | 2015-12-23 | Robert Bosch Gmbh | Electric tool and method for operation of the same |
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 |
EP2288463B1 (en) * | 2008-05-14 | 2016-11-30 | Robert Bosch GmbH | Method for operating a jigsaw. |
EP3610990A1 (en) | 2018-08-14 | 2020-02-19 | Hilti Aktiengesellschaft | Control method for a hand-held machine tool, handheld machine tool and system including the handheld machine tool and a stand |
US10589413B2 (en) | 2016-06-20 | 2020-03-17 | Black & Decker Inc. | Power tool with anti-kickback control system |
Families Citing this family (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19900882A1 (en) * | 1999-01-12 | 2000-07-13 | Bosch Gmbh Robert | Hand-held machine tool, especially drill or angle grinder, has locking and blocking elements brought into engagement axially in direction of blocking element rotation axis in uncontrolled state |
DE10051775A1 (en) * | 2000-10-19 | 2002-05-16 | Hilti Ag | Safety circuit for rotating electrical hand tool device |
SE520435C2 (en) * | 2001-03-30 | 2003-07-08 | Scania Cv Ab | Method and apparatus for determining cylinder pressure in an internal combustion engine |
DE10117121A1 (en) * | 2001-04-06 | 2002-10-17 | Bosch Gmbh Robert | Hand tool |
EP1539434B1 (en) * | 2002-09-13 | 2013-08-21 | Black & Decker Inc. | Rotary tool |
US7015409B2 (en) | 2002-12-23 | 2006-03-21 | Milwaukee Electric Tool Corporation | Power tool trigger |
DE10303006B4 (en) * | 2003-01-27 | 2019-01-03 | Hilti Aktiengesellschaft | Hand-held implement |
DE10309012B3 (en) * | 2003-03-01 | 2004-08-12 | Hilti Ag | Control method for hand-held electric hammer drill using microcontroller for repetitive opening and closing of clutch between electric motor and tool chuck |
DE10316844A1 (en) * | 2003-04-11 | 2004-11-04 | Hilti Ag | Control of an electric hand machine tool |
US7395871B2 (en) * | 2003-04-24 | 2008-07-08 | Black & Decker Inc. | Method for detecting a bit jam condition using a freely rotatable inertial mass |
DE10318798B4 (en) * | 2003-04-25 | 2006-01-26 | Robert Bosch Gmbh | drill |
DE10341974A1 (en) * | 2003-09-11 | 2005-04-21 | Bosch Gmbh Robert | shut-off |
DE102004003202B4 (en) | 2004-01-22 | 2022-05-25 | Robert Bosch Gmbh | Handle with detection device |
US7552781B2 (en) | 2004-10-20 | 2009-06-30 | Black & Decker Inc. | Power tool anti-kickback system with rotational rate sensor |
US7410006B2 (en) * | 2004-10-20 | 2008-08-12 | Black & Decker Inc. | Power tool anti-kickback system with rotational rate sensor |
US20060157262A1 (en) * | 2005-01-14 | 2006-07-20 | Jui-Yu Chen | Power tool having presetable digital control of torque output |
JP3988055B2 (en) * | 2005-07-22 | 2007-10-10 | 和浩 山本 | Electric drill |
CA2634917C (en) * | 2005-12-23 | 2016-08-23 | Mark-Paul Buckingham | Monitoring apparatus and method |
US8316958B2 (en) * | 2006-07-13 | 2012-11-27 | Black & Decker Inc. | Control scheme for detecting and preventing torque conditions in a power tool |
US20080021590A1 (en) * | 2006-07-21 | 2008-01-24 | Vanko John C | Adaptive control scheme for detecting and preventing torque conditions in a power tool |
US20090065225A1 (en) * | 2007-09-07 | 2009-03-12 | Black & Decker Inc. | Switchable anti-lock control |
FR2935496B1 (en) * | 2008-08-29 | 2014-05-16 | Pellenc Sa | METHOD FOR STOPPING PORTABLE TOOLS DURING UNEXPECTED BRUSH MOVEMENTS, AND PORTABLE TOOLS BY APPLYING |
JP5537055B2 (en) * | 2009-03-24 | 2014-07-02 | 株式会社マキタ | Electric tool |
JP5448569B2 (en) * | 2009-05-21 | 2014-03-19 | 株式会社やまびこ | Brush cutter with safety device |
JP5448568B2 (en) * | 2009-05-21 | 2014-03-19 | 株式会社やまびこ | Work machine with safety device |
DE102009046789A1 (en) * | 2009-11-17 | 2011-05-19 | Robert Bosch Gmbh | Hand machine tool device |
JP5412249B2 (en) * | 2009-11-19 | 2014-02-12 | 株式会社マキタ | Hand tool |
GB2490447A (en) * | 2010-01-07 | 2012-10-31 | Black & Decker Inc | Power screwdriver having rotary input control |
DE102010043032A1 (en) * | 2010-10-28 | 2012-05-03 | Hilti Aktiengesellschaft | Control method for a machine tool and a machine tool |
US9352456B2 (en) | 2011-10-26 | 2016-05-31 | Black & Decker Inc. | Power tool with force sensing electronic clutch |
DE102012208913A1 (en) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Percussion unit |
DE102012208855A1 (en) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Hand tool |
GB201212958D0 (en) * | 2012-07-20 | 2012-09-05 | Hosking Peter J | Power tools |
DE102014202585A1 (en) * | 2013-04-29 | 2014-10-30 | Robert Bosch Gmbh | Hand tool operating unit |
DE102013212626A1 (en) * | 2013-06-28 | 2014-12-31 | Robert Bosch Gmbh | Hand machine tool device |
DE102014207434A1 (en) * | 2014-04-17 | 2015-10-22 | Robert Bosch Gmbh | Method for operating a handheld power tool, power tool |
CN105082261A (en) * | 2014-05-13 | 2015-11-25 | 苏州宝时得电动工具有限公司 | Chain saw and control method thereof |
EP3023203A1 (en) * | 2014-11-20 | 2016-05-25 | HILTI Aktiengesellschaft | Control method for a hand-held machine tool |
EP3023200A1 (en) * | 2014-11-20 | 2016-05-25 | HILTI Aktiengesellschaft | Control method for a hammer drill |
EP3023202A1 (en) * | 2014-11-20 | 2016-05-25 | HILTI Aktiengesellschaft | Security method and handheld machine tool |
DE102015205172A1 (en) * | 2015-03-23 | 2016-09-29 | Robert Bosch Gmbh | Machine tool, in particular hand tool, with a motor drive unit and with at least one sensor device |
JP2017001115A (en) | 2015-06-05 | 2017-01-05 | 株式会社マキタ | Working tool |
KR101799432B1 (en) * | 2015-09-22 | 2017-11-21 | 계양전기 주식회사 | Electrically-drive tool |
EP3199303A1 (en) * | 2016-01-29 | 2017-08-02 | HILTI Aktiengesellschaft | Handheld machine tool |
JP6757226B2 (en) * | 2016-10-07 | 2020-09-16 | 株式会社マキタ | Electric tool |
SE1651353A1 (en) | 2016-10-17 | 2018-02-27 | Husqvarna Ab | Safety arrangement and method for a floor surfacing machine |
US11529725B2 (en) | 2017-10-20 | 2022-12-20 | Milwaukee Electric Tool Corporation | Power tool including electromagnetic clutch |
EP3700713B1 (en) | 2017-10-26 | 2023-07-12 | Milwaukee Electric Tool Corporation | Kickback control methods for power tools |
EP4031331B1 (en) * | 2019-09-20 | 2023-08-09 | Hilti Aktiengesellschaft | Method for operating a hand-held power tool, and hand-held power tool |
US11691262B2 (en) | 2019-09-26 | 2023-07-04 | Makita Corporation | Electric power tool |
JP7382190B2 (en) * | 2019-09-26 | 2023-11-16 | 株式会社マキタ | rotary tool |
EP3825066A1 (en) * | 2019-11-21 | 2021-05-26 | Hilti Aktiengesellschaft | Handheld machine tool and method for operating same |
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 |
US11845173B2 (en) | 2020-10-16 | 2023-12-19 | Milwaukee Electric Tool Corporation | Anti bind-up control for power tools |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5401124A (en) * | 1991-04-12 | 1995-03-28 | Robert Bosch Gmbh | Hand-held power tool with jamming-detection sensor |
DE4344817A1 (en) * | 1993-12-28 | 1995-06-29 | Hilti Ag | Method and device for hand-held machine tools to avoid accidents due to tool blocking |
EP0771619A2 (en) * | 1995-11-02 | 1997-05-07 | Robert Bosch Gmbh | Process for interrupting the operation of a hand tool and hand tool therefore |
DE19641618A1 (en) * | 1996-10-09 | 1998-04-30 | Hilti Ag | Accident prevention device for hand-controlled machine tools |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4063600A (en) * | 1976-05-05 | 1977-12-20 | Krzes Casey S | Power tool safety mechanism |
JPS6014487B2 (en) * | 1980-06-23 | 1985-04-13 | 株式会社明電舎 | How to bond lightning arrester elements |
DE3346215A1 (en) * | 1983-12-21 | 1985-07-11 | Hilti Ag, Schaan | HAND TOOL WITH MOVABLE BEARING DIMENSIONS |
EP0303651B2 (en) * | 1987-03-05 | 1999-12-01 | Robert Bosch Gmbh | Process for interrupting the operation of a hand tool, in particular percussion and/or rotation thereof |
DE3707052A1 (en) * | 1987-03-05 | 1988-09-15 | Bosch Gmbh Robert | Method for interrupting the drive activity, in particular rotary-drive activity, of a powered hand tool |
US4866429A (en) * | 1987-08-12 | 1989-09-12 | Scientific Atlanta, Inc. | Automated machine tool monitoring device |
US5014793A (en) * | 1989-04-10 | 1991-05-14 | Measurement Specialties, Inc. | Variable speed DC motor controller apparatus particularly adapted for control of portable-power tools |
DE3941756A1 (en) * | 1989-12-18 | 1991-06-20 | Gildemeister Ag | METHOD FOR DETERMINING THE PRESENCE, DIMENSIONS OR THE CORRECT LOCATION AND POSITION OF A WORKPIECE ON A MACHINE TOOL |
US5235472A (en) * | 1991-10-18 | 1993-08-10 | Seagate Technology, Inc. | Apparatus for sensing operating shock on a disk drive |
DE4334933C2 (en) * | 1993-10-13 | 1997-02-20 | Fraunhofer Ges Forschung | Method and device for forcibly switching off hand-held tools |
DE19628945A1 (en) * | 1995-11-02 | 1997-05-07 | Bosch Gmbh Robert | Process for interrupting the driving activity of a hand tool, and hand tool working according to this process |
DE19646382A1 (en) * | 1996-11-11 | 1998-05-14 | Hilti Ag | Handheld device |
DE19646381A1 (en) * | 1996-11-11 | 1998-05-14 | Hilti Ag | Handheld device |
-
1998
- 1998-12-10 DE DE19857061A patent/DE19857061C2/en not_active Expired - Fee Related
-
1999
- 1999-12-01 US US09/452,302 patent/US6111515A/en not_active Expired - Lifetime
- 1999-12-06 EP EP99811119A patent/EP1008422B1/en not_active Expired - Lifetime
- 1999-12-06 DE DE59914191T patent/DE59914191D1/en not_active Expired - Lifetime
- 1999-12-07 CN CNB991228626A patent/CN1160526C/en not_active Expired - Lifetime
- 1999-12-10 JP JP35144999A patent/JP4486728B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5401124A (en) * | 1991-04-12 | 1995-03-28 | Robert Bosch Gmbh | Hand-held power tool with jamming-detection sensor |
DE4344817A1 (en) * | 1993-12-28 | 1995-06-29 | Hilti Ag | Method and device for hand-held machine tools to avoid accidents due to tool blocking |
EP0771619A2 (en) * | 1995-11-02 | 1997-05-07 | Robert Bosch Gmbh | Process for interrupting the operation of a hand tool and hand tool therefore |
DE19641618A1 (en) * | 1996-10-09 | 1998-04-30 | Hilti Ag | Accident prevention device for hand-controlled machine tools |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1227561A3 (en) * | 2001-01-24 | 2009-07-22 | HILTI Aktiengesellschaft | Rotatable electric hand tool with starting security system |
EP1227561A2 (en) | 2001-01-24 | 2002-07-31 | HILTI Aktiengesellschaft | Rotatable electric hand tool with starting security system |
DE10309414A1 (en) * | 2003-03-05 | 2004-09-23 | Robert Bosch Gmbh | Sensor device for detecting jamming of power tool, especially percussion drill, uses single motion sensor to measure degrees of movement along two sensor axes |
DE10309414B4 (en) * | 2003-03-05 | 2009-01-08 | Robert Bosch Gmbh | Sensor device and associated method for a hand tool |
EP1714723A3 (en) * | 2005-04-19 | 2014-03-19 | Black & Decker, Inc. | Electric clutch for tool chuck with power take off and dead spindle features |
EP1714723A2 (en) * | 2005-04-19 | 2006-10-25 | Black & Decker, Inc. | Electric clutch for tool chuck with power take off and dead spindle features |
EP2288463B1 (en) * | 2008-05-14 | 2016-11-30 | Robert Bosch GmbH | Method for operating a jigsaw. |
US9199362B2 (en) | 2010-01-07 | 2015-12-01 | Black & Decker Inc. | Power tool having rotary input control |
US9211636B2 (en) | 2010-01-07 | 2015-12-15 | 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 |
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 |
USD703017S1 (en) | 2011-01-07 | 2014-04-22 | Black & Decker Inc. | Screwdriver |
EP2581168A1 (en) * | 2011-10-13 | 2013-04-17 | Oy Kwh Mirka Ab | Handheld machine |
EP2656977A3 (en) * | 2012-04-26 | 2015-12-23 | Robert Bosch Gmbh | Electric tool and method for operation of the same |
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 |
EP3610990A1 (en) | 2018-08-14 | 2020-02-19 | Hilti Aktiengesellschaft | Control method for a hand-held machine tool, handheld machine tool and system including the handheld machine tool and a stand |
Also Published As
Publication number | Publication date |
---|---|
US6111515A (en) | 2000-08-29 |
EP1008422A3 (en) | 2001-09-19 |
DE59914191D1 (en) | 2007-03-29 |
DE19857061A1 (en) | 2000-06-15 |
JP2000263304A (en) | 2000-09-26 |
CN1256383A (en) | 2000-06-14 |
CN1160526C (en) | 2004-08-04 |
EP1008422B1 (en) | 2007-02-14 |
JP4486728B2 (en) | 2010-06-23 |
DE19857061C2 (en) | 2000-11-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1008422B1 (en) | Method and device for handheld machine tools to prevent accidents caused by tool blockage | |
EP0666148B1 (en) | Method and apparatus for handheld machine tools to prevent accidents caused by blocking of the tool | |
EP0580628B1 (en) | Hand-held power tool with jamming-detection sensor | |
EP1157898B1 (en) | Method for rollover detection of vehicles with safety system | |
EP0980323B1 (en) | Circuit for controlling a passenger protection device in an automobile | |
DE4116336C1 (en) | Passive safety device release assembly for motor vehicle occupant - has acceleration pick=ups with sensitivity axes directed to detect angle of frontal impact and supplying evaluating circuit | |
EP1157899B1 (en) | Process and safety system for detecting a roll-over and for enabling a safety device in a motor vehicle | |
DE10065518B4 (en) | Method for triggering restraint devices in a motor vehicle | |
DE69737104T2 (en) | SAFETY DEVICE FOR VEHICLES | |
DE3942011C2 (en) | ||
DE102016010813B4 (en) | Electronic device with shock detection function | |
DE19641618A1 (en) | Accident prevention device for hand-controlled machine tools | |
DE19807124A1 (en) | Method and device for triggering a restraint system | |
DE10304019A1 (en) | Method for monitoring a machine and such a machine, in particular a robot | |
EP0771619B2 (en) | Process for interrupting the operation of a hand tool and hand tool therefore | |
DE3816587A1 (en) | DEVICE FOR TRIGGERING A PASSIVE SAFETY DEVICE | |
EP0830271B1 (en) | Control device for triggering a restraint system in a vehicle during a sideways-on collision | |
DE102004014914B4 (en) | An apparatus and method for abnormality detection of a vibration angular velocity sensor, abnormality detection program, and related vehicle control system | |
EP1110064B1 (en) | Method and device for controlling an occupant protection means in a vehicle | |
DE10309414B4 (en) | Sensor device and associated method for a hand tool | |
EP1503922B1 (en) | Method for releasing a safety device in a motor vehicle in the event of an overturn | |
DE102008043475B4 (en) | Device control method and device control device | |
EP1444115B1 (en) | Method for determining the key crash phases for triggering a passive safety device in a vehicle | |
EP0852193B1 (en) | Method for triggering a safety device, particularly a belt tensioner in a passenger transport | |
DE10335169A1 (en) | Sensor arrangement for a motor vehicle for detecting an impact, as well as an associated evaluation method for an occupant protection system in a vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Kind code of ref document: A2 Designated state(s): CH DE GB LI NL SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 20020319 |
|
AKX | Designation fees paid |
Free format text: CH DE GB LI NL SE |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE GB LI NL SE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 59914191 Country of ref document: DE Date of ref document: 20070329 Kind code of ref document: P |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20070321 |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20071115 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20181219 Year of fee payment: 20 Ref country code: DE Payment date: 20181210 Year of fee payment: 20 Ref country code: NL Payment date: 20181219 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20181218 Year of fee payment: 20 Ref country code: CH Payment date: 20181218 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 59914191 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MK Effective date: 20191205 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20191205 |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: EUG |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20191205 |