WO2011082883A1 - Outil manuel muni d'un entraînement à courant de foucault - Google Patents

Outil manuel muni d'un entraînement à courant de foucault Download PDF

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Publication number
WO2011082883A1
WO2011082883A1 PCT/EP2010/068222 EP2010068222W WO2011082883A1 WO 2011082883 A1 WO2011082883 A1 WO 2011082883A1 EP 2010068222 W EP2010068222 W EP 2010068222W WO 2011082883 A1 WO2011082883 A1 WO 2011082883A1
Authority
WO
WIPO (PCT)
Prior art keywords
eddy current
tool
pulse
impact
eddy
Prior art date
Application number
PCT/EP2010/068222
Other languages
German (de)
English (en)
Inventor
Anton Dukart
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
Priority to EP10782613A priority Critical patent/EP2512746A1/fr
Priority to CN2010800570452A priority patent/CN102655988A/zh
Publication of WO2011082883A1 publication Critical patent/WO2011082883A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/064—Means for driving the impulse member using an electromagnetic drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/21—Metals
    • B25D2222/42—Steel
    • 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
    • B25D2250/141—Magnetic parts used in percussive tools
    • 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
    • B25D2250/141—Magnetic parts used in percussive tools
    • B25D2250/145—Electro-magnetic parts

Definitions

  • the invention relates to a hand tool, in particular a percussion hammer, hammer drill or an electric chisel.
  • the hand tool has a striking mechanism.
  • the hand tool preferably has a tool holder operatively connected to the impact mechanism.
  • the tool holder is preferably designed to receive a tool in particular separable.
  • the eddy-current generator is preferably designed to generate at least one impact, preferably temporally successive impacts, by means of an eddy current, in particular at least one eddy-current pulse.
  • the hand tool has an eddy current receiver movably mounted along a striking axis, which is arranged in the area of action of the eddy current generator.
  • the eddy-current generator is preferably designed to generate a magnetic pulse such that an eddy current, in particular the eddy-current pulse, can be generated in the eddy-current receiver and the eddy-current receiver, depending on the eddy current, generates a counter-current to the magnetic pulse.
  • Magnetic pulse can generate.
  • the eddy current receiver can be repelled by the eddy current generator and along the striking axis a Generate shock.
  • the eddy current receiver and the tool holder are preferably arranged relative to one another such that the tool can receive the impact.
  • the hand tool can advantageously produce the impact with low wear and, furthermore, advantageous energy efficiency.
  • the eddy current receiver is connected to the tool or formed by the tool itself.
  • the eddy current receiver is formed by a plate which is in particular highly conductive, in particular made of copper or aluminum.
  • the plate preferably forms an end of the tool facing the eddy current receiver.
  • the tool is preferably formed from steel, in particular along the striking axis from the plate to a tool end formed for machining material.
  • the tool is integrally formed from steel and is designed to form the eddy current as a function of the magnetic pulse.
  • the tool thus forms the eddy current receiver, and can generate a Repulsionskraft by a counter-magnetic pulse as a function of the eddy current and generate the impact by repulsion from the eddy current generator.
  • an embodiment of the hand tool as a nail device.
  • the tool is formed in this embodiment by a nail, which can be driven by means of the eddy current generator in an object. After consumption of the nail, a new nail can be driven with the hand tool.
  • a surface of the nail can remain intact.
  • no impact acting obliquely on a longitudinal axis of the nail can thus bend the nail.
  • the percussion mechanism is designed to transfer at least part of the impact energy of the impact into a rotational movement of the tool about the striking axis.
  • the percussion mechanism is designed to convert at least part of the impact energy of the impact into a rotational movement of the tool about the striking axis.
  • the hammer mechanism can preferably have the tool for this purpose.
  • the tool in particular a Chisel, for example, in a region which is in particular designed to receive a magnetic pulse and to generate the eddy current, have a surface which is helically formed along the striking axis. Due to the helical design of the surface, a magnetic field distribution is advantageously formed to repel the eddy current receiver from the eddy current generator, which transmits an angular momentum during ejection from the eddy current generator, the eddy current receiver and preferably additionally the tool.
  • the vortex generator has a flat coil whose coil windings extend with a radius of curvature that increases radially outward from the striking axis.
  • the coil windings of the flat coil are formed of stranded wire.
  • the coil in particular due to a skin effect, can generate the magnetic pulse particularly efficiently.
  • the coil windings of the flat coil extend helically in a longitudinal section along the striking axis such that the tool can perform a rotational movement about the striking axis in addition to a translation movement along the striking axis.
  • the tool can additionally carry out a drilling movement at least in sections in the circumferential direction of rotation.
  • the eddy current receiver in particular a firing pin or the tool, can be formed in the region of one end with a flat surface which is arranged in the effective region of the eddy current generator and faces the eddy current generator. Further advantageously, an angular momentum can be transmitted to the tool by the flat coil thus formed, so that the tool can also perform a rotational movement in addition to a striking movement.
  • the flat coil is connected to generate the magnetic pulse with a capacitor.
  • the flat coil and the capacitor form electromagnetically a resonant circuit.
  • the magnetic pulse can be generated particularly efficiently.
  • the percussion mechanism preferably has a piezo sensor or an inductive sensor, for example a sensor coil, which is designed to detect a back-reflected impact, in particular a back-reflected shockwave, and to generate a corresponding sensor signal.
  • the hand tool is further preferably designed to generate a further impact as a function of the sensor signal.
  • the inductive sensor is preferably formed by the coil of the eddy current generator.
  • the invention also relates to a percussion mechanism for a hand tool, wherein the impact mechanism on a tool holder.
  • the striking mechanism has an eddy-current generator which is designed to generate at least one impact, preferably a chronological sequence of impacts.
  • the percussion mechanism preferably has an eddy current receiver movably mounted along a striking axis.
  • the eddy current generator is designed to generate a magnetic pulse in such a way that an eddy current can be generated in the eddy current receiver and the eddy current receiver can produce a counter magnetic pulse directed counter to the magnetic pulse as a function of the eddy current and thus be repelled by the eddy current generator and produce a shock along the axis of the impact
  • the impact mechanism has a tool holder, wherein the tool holder and the eddy current receiver are arranged to each other such that a in the
  • Tool holder held tool can receive the shock.
  • the hand tool preferably has a handle with which the hand tool can be held by an adult hand or with two hands.
  • the invention also relates to a method for operating a hand tool that is at least hammering, preferably in addition to drilling, in particular the hand tool described above.
  • a shock acting on a tool is generated by means of an eddy-current generator, wherein the eddy-current generator generates a magnetic pulse and a vortex is generated in a eddy-current receiver movably arranged along a striking axis.
  • the eddy current receiver generates a counter-magnetic pulse directed counter to the magnetic pulse.
  • the eddy current receiver is thus repelled by the eddy current generator in particular by a repulsive force resulting from the forces and generates a shock along the striking axis.
  • the blow is delivered at least indirectly to a tool.
  • the blow may be in addition to a movement of the tool as a whole in the direction of the impact axis - in response to a temporal velocity profile of the shock - comprise a shock wave, which propagates from the eddy current receiver to an end provided for working the tool, in particular a chisel tip. From the end of a portion of the shock wave is reflected back and migrates to the eddy current generator facing the end of the tool. There, the reflected portion of the shock wave can be detected by a sensor, a corresponding sensor signal can be generated. Another blow can be generated as a function of the sensor signal.
  • At least part of the impact energy of the impact is converted into a rotational movement of the tool about the impact axis.
  • a drilling movement can advantageously be carried out which, for example, comprises only a part of a rotational circumference of the tool about the striking axis.
  • the magnetic pulse is generated from the energy of a resonant circuit.
  • the eddy current generator may have a flat coil for generating the magnetic pulse, which is connected to a capacitor and which is in resonance with the capacitor.
  • the magnetic pulse is generated by the eddy current generator with increasing pulse amplitude.
  • the armature can advantageously be gently accelerated so that recoil forces are smaller than in the case of a magnetic pulse, for example rectangular.
  • the magnetic pulse with increasing pulse amplitude for example, has a sawtooth shape at least in pulse sections.
  • the eddy current generator comprises a current source capable of generating a total pulse for generating a train of a train of pulses, the overall pulse comprising an AC pulse for generating the eddy current and a DC pulse subsequent to the AC pulse for retracting the eddy current receiver.
  • Figure 1 shows schematically an embodiment of a hammer mechanism of a hand tool with an eddy current generator and with a tool which has an eddy current receiver in the region of an end facing the eddy current generator;
  • Figure 2 shows schematically an embodiment of a striking mechanism of a
  • Hand tool with an eddy current generator which is in operative connection with a trained as a firing pin eddy current receiver.
  • the firing pin can generate a shock and deliver it to a held by a tool holder tool;
  • Figure 3 shows schematically an embodiment of a striking mechanism of a
  • Hand tool which has an eddy current drive and with which in addition to a blow along a striking axis, a rotational movement of the tool can be generated about the striking axis;
  • Figure 4 shows schematically an embodiment of a coil of a vortex generator, with which a rotational movement of the tool can be generated
  • Figure 5 shows an embodiment of a circuit arrangement for the striking mechanisms shown in Figures 1, 2 and 3;
  • FIG. 6 shows schematically an exemplary embodiment of an arrangement for illustrating an operating principle of a percussion-driven striking mechanism
  • Figure 7 shows an embodiment of a vortex-powered percussion with a ferromagnetically shaped anchor as eddy current receiver.
  • Figure 1 shows an embodiment of a hammer mechanism 1 for a hand tool.
  • the hand tool for example, a hammer, hammer drill or
  • the striking mechanism 1 has a receiving device 14 for a tool 12.
  • the tool 12 is formed in this embodiment as a chisel.
  • the receiving device 14 is designed to guide the chisel 12 such that the chisel 12 can be moved back and forth along a striking axis 30.
  • the receiving device 14 is formed, for example, a hollow cylindrical shape, and encloses a cylindrical lumen, in which the tool, in particular bit, at least partially can be performed.
  • the striking mechanism 1 also has an eddy current drive.
  • the eddy current drive has an electrical coil with coil turns, of which the coil turns 24 and 26 are exemplified.
  • the coil is designed as a flat coil, which in this exemplary embodiment has coil windings made of an electrically, in particular, highly conductive material, for example copper.
  • the coil turns of the coil have a rectangular cross-section in this embodiment.
  • the coil is formed in this embodiment as a flat coil, which is connected to a bobbin 22.
  • the bobbin 22 is formed for example of bonded with epoxy resin glass fibers or of a ceramic material.
  • the flat coil and the coil support 22 each extend in a plane which is perpendicular to the impact axis 30.
  • the coil with coil windings 24 and 26 is designed to generate current flowing through a magnetic pulse, which can generate an eddy current in the effective range of the coil in an eddy current receiver 36.
  • the eddy current receiver 36 is formed in this embodiment as a good electrical conductive plate, for example, copper material, which is connected in this embodiment with the tool, in particular the chisel 12.
  • the tool, in particular the chisel 12 can in this embodiment of a hard, less well electrically conductive material, for example
  • the eddy current generated in the eddy current receiver 36 generates its own counter-magnetic pulse, which cooperates with the magnetic pulse generated by the coil, wherein the magnetic pulse of the coil and the counter-magnetic pulse generated by the eddy current repel each other.
  • a shock wave is generated, which as along the striking axis 30 in the chisel 12 propagating shock wave 34, in particular longitudinal wave, moved from the eddy current receiver to a chisel tip.
  • a cover plate 19 which has an opening in the region of the coil, so that magnetic field lines which have been generated by the coil penetrated through the aperture to the eddy current receiver can.
  • the cover plate 19 is formed, for example, of steel and protrudes radially inwards with a projecting area transverse to the impact axis 30, so that the tool 12, in particular the bit, can strike against the cover plate 19 in a form-fitting manner against the cover when moving back against the coil and thus against advancement is stopped.
  • an acceleration sensor in particular a disk-shaped piezoelectric element 18, is arranged along the striking axis 30.
  • the disk-shaped piezoelectric element 18 has an opening through which magnetic field lines of the magnetic pulse generated by the coil can pass.
  • the piezoelectric element 18 is formed in
  • the hand tool can energize, for example, depending on the acceleration signal, the coil for emitting a magnetic pulse.
  • the coil for emitting a magnetic pulse.
  • a strike of the striking tool can be triggered.
  • a backward movement of the tool and / or a shock wave reflected at a tool end can be detected, and depending on the acceleration signal-for example controlled by a control unit-a triggering of a further impact takes place.
  • FIG. 2 shows an exemplary embodiment of a hammer mechanism 10 of a hand tool.
  • the impact mechanism 10, like the percussion mechanism 1 in FIG. 1, has the same components, which are each provided with the same reference numerals.
  • the same components have the same functions as the components shown in Figure 1, each having the same reference numerals.
  • the hammer mechanism 10 in Figure 2 a chisel 13 as a tool of the percussion.
  • the tool 13 is - unlike the tool 12 in Figure 1 - not formed for generating an eddy current.
  • the percussion mechanism 10 has - unlike in FIG. 1 - a firing pin 25 which extends along the striking axis 30 between the tool 13 and the impactor.
  • Belstromerzeuger comprising the bobbin 22 and the coil is arranged.
  • the firing pin 25 is formed in this embodiment, to generate an eddy current in response to the magnetic pulse generated by the coil.
  • the firing pin 25 has a plate 37 consisting of electrically preferably highly conductive material, which is arranged facing the coil along the striking axis 30.
  • the plate 37 is connected to the firing pin 25 and forms part of the firing pin 25, which may be formed, for example, except for the eddy current receiver made of steel.
  • the firing pin 25 is received by the tool holder 14 and in the
  • Tool holder 14 movably arranged.
  • the tool holder 14 has - in contrast to the tool holder 14 in Figure 1 - in addition to a sensor coil 16.
  • the sensor coil 16 is annular and encloses a lumen in which the tool 13 is at least partially arranged to move back and forth.
  • the sensor coil 16 is configured to move the tool 13 along the
  • the sensor coil 16 can be connected, for example, to a control unit, wherein the control unit is designed to energize the coil for generating a shock as a function of the sensor signal. This can for example be done so efficiently that the coil 30 is first energized to generate a shock when the tool 13 has moved completely along the striking axis 30 in the direction of the coil against the firing pin 25 and is ready for further forward movement.
  • impact energy can advantageously be implemented efficiently insofar as an impact energy given off too early would be canceled out by at least a partial retraction of the tool 13 against a backward movement of the tool.
  • FIG. 3 shows an exemplary embodiment of a striking mechanism 20 of a hand tool.
  • the percussion mechanism 20 has an eddy-current generator with a coil carrier 22, on which a flat coil is arranged, of whose coil turns the coil turns 28 and 29 are designated by way of example.
  • the flat coil is designed in such a way that coil turns lying radially further outward have a dimension extending in the direction of the striking axis 30, which dimension is larger than coil turns located radially further inside.
  • the coil can thus advantageously form a helical shape, which is shown in more detail in Figure 4.
  • the helical shape thus formed by means of the coil causes the tool 1 1 of the impact mechanism 20 in a
  • Rotary movement 32 can be offset, which is superimposed on the impact caused by the shock wave 34 translational movement along the striking axis 30.
  • the tool 1 1 can thus simultaneously exert a drilling rotational movement during a beating operation.
  • FIG. 4 shows an exemplary embodiment of an outer coil turn 29 of FIG
  • the coil turn 29 extends along a circumferential direction increasingly in the direction of the striking axis 30, so that the coil turn along the striking axis 30 forms a helical shape.
  • the helical shape causes the tool 1 1 can perform a rotational movement 32 when energizing the coil.
  • Figure 5 shows a circuit arrangement for a percussion of a hand tool, which is designed to generate an eddy current, which can put a tool in a striking motion.
  • circuit arrangement 50 has a voltage source 60 which, for example, has a high voltage of several kilovolts, preferably at least 7 kilovolts or at least 10 kilovolts.
  • the voltage source 60 is connected via a resistor 62 to an anode terminal of a thyristor 58.
  • the thyristor 58 has a cathode terminal, which is connected to the other terminal of the voltage source 60.
  • the thyristor 58 has a control connection, which is connected via a connecting line 66 to a control unit 56.
  • the control unit 56 is connected on the input side via a connecting line 65 to a sensor coil 16.
  • the control unit 56 is also connected on the input side via a connecting line 64 to the acceleration sensor 18, which has been shown in FIG. 1 and in FIG. 2 and has already been explained.
  • the anode terminal of the thyristor 58 is connected to a first terminal of a capacitor 54.
  • the capacitor 54 has a second terminal which is connected to a first terminal of a coil 52.
  • the coil 52 is part of an eddy current generator already shown in FIGS. 1 and 2, which is designed to generate a magnetic pulse through current.
  • the coil 52 has a second connection, which is connected to the cathode terminal of the thyristor 58 and also to the voltage source 60.
  • the hand tool for example the hand tool shown in FIG. 2
  • the tool 13 presses against the firing pin 25 and causes the acceleration sensor 18 to generate an acceleration signal, in particular by a pressure exerted thereon Tension.
  • the acceleration sensor 18 may send the acceleration signal to the control unit 56 via the connection line 64.
  • the control unit 56 is designed to generate a trigger signal as a function of the acceleration signal and output this via the connecting line 66 and thus to ignite the thyristor 58.
  • the control unit 56 is connected via a connecting line 67 to the coil 52 and can - in addition to or independent of the acceleration sensor 18 - generate the trigger signal in response to a waveform of a voltage induced by the eddy current in the coil 52.
  • a stroke of the tool 12 or 13 is for example between three and four millimeters.
  • the capacitor 54 which was previously charged by the voltage source 60 via the resistor 62 with electrical charge, so its charge via the thyristor 58, as well as discharged via the capacitor 52 connected in series coil 52.
  • the discharge current of the capacitor 54 - preferably the capacitor 54 and the coil 52 is in resonance - is converted in the coil 52 into a magnetic pulse.
  • the magnetic pulse can be received by the eddy current receiver 36 shown in FIG. 1, or by the eddy current receiver 37 shown in FIG. 2, and generate an eddy current there, which in each case generates an eddy current receiver.
  • gen-generate magnetic pulse so that the firing pin 25 or the eddy current receiver 36 together with the tool 12 along the striking axis 30 can exert a shock.
  • a renewed generation of a trigger signal by the control unit 56 can be effected in dependence on an acceleration signal, a sensor signal of the sensor coil 16 or a signal curve of a voltage induced by the eddy current in the coil 52.
  • the resistor 62 has a resistance value such that during the firing of the thyristor 58, the capacitor 54 can be discharged via the coil 52, wherein the voltage source 60 is not short-circuited.
  • FIG. 6 shows an embodiment of an operation of the in the figures
  • FIG. 6 shows an arrangement 70 which includes a coil 76 as part of an eddy current generator, an AC voltage source 80 connected to the coil 76, and a flat electrically conductive eddy current receiver 74, which has a longitudinally extending tool along a striking axis 30 connected is.
  • the alternating voltage source 80 can generate a current which flows through the coil 76 in a current direction during a half cycle of the alternating voltage - indicated in FIG. 6 by means of the arrows on the coil 76 - and thus generates a magnetic pulse 77.
  • the magnetic pulse 77 causes an eddy current 85 in the eddy current receiver 74, which generates a counter magnetic pulse 78 opposite the magnetic pulse 77.
  • the mutually oppositely directed magnetic pulses 77 and 78 cause a repulsive force 79, which repels the eddy current receiver 74 along with the tool 72 along the striking axis 30 of the coil 76 of the Wirbelstromer- generator.
  • a shock wave can be generated in the tool 72, which propagates in the tool 72 along the striking axis 30 to a tool tip of the tool 72, depending on the time course of the magnetic pulse.
  • the magnetic pulse can have such a length in time that a shockwave can propagate in the tool.
  • FIG. 7 shows schematically an embodiment of a hammer mechanism 90 with eddy current drive in a longitudinal sectional view.
  • the percussion mechanism 90 has a ferromagnetic cup 92, wherein the cup is magnetically conductively connected to a ferromagnetic core 94 in the region of a cup bottom of the cup 92, so that a magnetic flux from the Core can flow into a cup wall.
  • the core 94 is cylindrical in this embodiment and extends from the cup bottom to a cup rim, so that between an outer cylinder wall of the core and a cup inner wall a - transverse to a striking axis 30 - annular air gap is formed.
  • the inner wall of the cup is formed, for example, in the shape of a cone, so that a volume forming the air gap has a conical section with an outer conical surface and a cylindrical inner casing surrounding the core 94.
  • a hollow cylindrical, in this embodiment, cup-shaped ferromagnetically formed armature 100 is arranged back and forth as an eddy current receiver, wherein a cup wall 101 of the armature 100 dips into the air gap 96.
  • the armature has in the region of one end a striking nose 102, which is designed to deliver a shock to a tool 13 when the armature 100 is moved along the striking axis 30.
  • the core is surrounded by an electric cylindrical coil whose magnetic field lines in the energized state run inside the coil 98 along or parallel to the striking axis 30 in the core 94.
  • the coil 98 is connected to a current source 106, which is designed to generate an AC pulse for generating a magnetic pulse for expelling the armature 100 and thus to generate an eddy current in the armature 100, in particular in the cup wall 101, whereby the armature from the air gap is moved along the striking axis 30 and can deliver a blow to the tool 13 with the whip nose 102.
  • the tool 13 is held in a tool holder 14 in particular back and forth.
  • the percussion mechanism can have, in addition to the coil 98, a flat coil 104 arranged on one end side of the core 94, which is connected in series with the coil 98, for example, or is connected to the coil 98 in parallel with the current source 106.
  • the pancake 104 may generate an additional eddy current in a cup bottom of the armature 100, which enhances the impact energy of the armature.
  • the conical shape of the air gap causes an increasing magnetic field strength of the magnetic field generated by the coil 98 in the air gap 96 starting from the cup bottom to the cup rim of the cup 92, so that the armature 100 with increasing exit from the air gap 96 a constant or increasing on the cup wall 101 acting Austriebskraft experiences.
  • FIG. 8 shows the percussion mechanism 90 shown in FIG. 7, in which the armature has partially moved out of the air gap 96 along the striking axis 30 and strikes against the tool 13.
  • the armature is shown in Figure 8 in a position 100 '.
  • the current source 106 is designed to generate a DC pulse after the AC pulse or after a pulse pause to drive off the armature and to withdraw the armature into the air gap 97 by means of the DC pulse. By periodically generating a total pulse or a pair of pulses comprising an AC pulse and a DC pulse, periodic beats can be generated periodically.
  • FIG. 9 shows a diagram with a time axis 1 10 and an amplitude axis 1 12, in which an exemplary embodiment for a previously described overall pulse 1 13 comprising an alternating-current pulse 1 14 and a direct-current pulse following the alternating-current pulse 1 14.
  • the AC pulse 1 14 has an AC pulse duration 1 16 and the DC pulse 1 15 has a DC pulse duration 1 18 on.
  • the ratio of the AC pulse duration 1 16 to the DC pulse duration 1 18 is for example 3: 1, so that the AC pulse duration 1 16 of the AC pulse 1 14 three quarters of a total pulse duration of a total pulse 1 13 for generating a shock, and the DC pulse duration 1 18 of the DC pulse 1 15th is one quarter of the total pulse duration.
  • a beat frequency may be, for example, 50 hertz.
  • the total pulse duration is for example 20 milliseconds, the AC pulse duration 1 16 is then 15 milliseconds and the DC pulse duration 1 18 five milliseconds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

L'invention concerne un outil manuel. L'outil manuel présente un élément percutant et un porte-outil en liaison fonctionnelle avec l'élément percutant. Le porte-outil est conçu de préférence pour recevoir un outil en particulier de façon séparée. Selon l'invention, l'outil percutant de l'outil manuel présente un générateur de courant de Foucault et un récepteur de courant de Foucault qui est monté de façon mobile le long d'un axe de percussion et qui est disposé dans la zone d'action du générateur de courant de Foucault. Le générateur de courant de Foucault est conçu pour générer une impulsion magnétique, de telle sorte qu'un courant de Foucault peut être généré dans le récepteur de courant de Foucault et le récepteur de courant de Foucault peut générer en fonction du courant de Foucault une contre-impulsion magnétique dirigée dans le sens contraire à l'impulsion magnétique. Le récepteur de courant de Foucault peut ainsi être repoussé par le générateur de courant de Foucault et générer un coup le long de l'axe de percussion. Le récepteur de courant de Foucault et le porte-outil sont disposés l'un par rapport à l'autre de préférence de telle sorte que l'outil peut recevoir le coup.
PCT/EP2010/068222 2009-12-15 2010-11-25 Outil manuel muni d'un entraînement à courant de foucault WO2011082883A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10782613A EP2512746A1 (fr) 2009-12-15 2010-11-25 Outil manuel muni d'un entraînement à courant de foucault
CN2010800570452A CN102655988A (zh) 2009-12-15 2010-11-25 具有涡流驱动装置的手持式工具

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DE102009054642.1 2009-12-15
DE102009054642 2009-12-15
DE102010043444.2 2010-11-05
DE102010043444A DE102010043444A1 (de) 2009-12-15 2010-11-05 Handwerkzeug mit einem Wirbelstromantrieb

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WO2011082883A1 true WO2011082883A1 (fr) 2011-07-14

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CN (1) CN102655988A (fr)
DE (1) DE102010043444A1 (fr)
WO (1) WO2011082883A1 (fr)

Families Citing this family (1)

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DE102011079819A1 (de) * 2011-07-26 2013-01-31 Hilti Aktiengesellschaft Handwerkzeugmaschine mit Lagereinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1449264A (fr) * 1965-10-05 1966-08-12 Hasenclever Ag Maschf Perfectionnements apportés aux marteaux automatiques
US4990805A (en) * 1987-05-27 1991-02-05 Zieve Peter B Low voltage electromagnetic pulse actuator
US5471865A (en) * 1993-09-09 1995-12-05 Gemcor Engineering Corp. High energy impact riveting apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1449264A (fr) * 1965-10-05 1966-08-12 Hasenclever Ag Maschf Perfectionnements apportés aux marteaux automatiques
US4990805A (en) * 1987-05-27 1991-02-05 Zieve Peter B Low voltage electromagnetic pulse actuator
US5471865A (en) * 1993-09-09 1995-12-05 Gemcor Engineering Corp. High energy impact riveting apparatus and method

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CN102655988A (zh) 2012-09-05
DE102010043444A1 (de) 2011-06-16

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