EP3323562A1 - Appareil de pose entraîné par volant d'inertie - Google Patents

Appareil de pose entraîné par volant d'inertie Download PDF

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Publication number
EP3323562A1
EP3323562A1 EP16199460.3A EP16199460A EP3323562A1 EP 3323562 A1 EP3323562 A1 EP 3323562A1 EP 16199460 A EP16199460 A EP 16199460A EP 3323562 A1 EP3323562 A1 EP 3323562A1
Authority
EP
European Patent Office
Prior art keywords
flywheel
setting tool
stator
driven setting
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.)
Withdrawn
Application number
EP16199460.3A
Other languages
German (de)
English (en)
Inventor
Tilo Dittrich
Raphael Thon
Dominik Schmidt
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP16199460.3A priority Critical patent/EP3323562A1/fr
Priority to EP17797356.7A priority patent/EP3541576B1/fr
Priority to PCT/EP2017/079066 priority patent/WO2018091414A1/fr
Priority to US16/461,577 priority patent/US20190366525A1/en
Publication of EP3323562A1 publication Critical patent/EP3323562A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power

Definitions

  • the invention relates to a flywheel driven setting tool for driving fasteners into a ground, with at least one flywheel, which is driven directly by an electric motor.
  • an electrically operated fastener driving device is known, with a drive arrangement for a displaceably mounted in a guide drive tappet, which has at least one via an electric motor in rotation displaceable drive flywheel, and with a restoring device, via which the drive tappet can be transferred to an initial position.
  • a fastener driving tool configured to drive fasteners into a workpiece, comprising at least one electric motor having a central stator and an outer rotor configured to rotate about the stator, at least a portion of the rotor comprising the flywheel includes.
  • the object of the invention is to provide a flywheel driven setting tool for driving fasteners into a ground, with at least one flywheel, which is driven directly by an electric motor, which has a good efficiency and a long life.
  • the task is in a flywheel-driven setting tool for driving fasteners into a ground, with at least one flywheel, the direct is driven by an electric motor, achieved in that the flywheel drive comprises two internal rotor motors.
  • the fasteners are, for example, nails or bolts, which are driven into the ground with the aid of the setting device, which is also referred to as a setting tool.
  • the set energy is advantageously provided via the electric motor and transmitted via the flywheel to a drive-in element, which is also referred to as a set piston.
  • the flywheel is rotated by the electric motor.
  • the rotational energy of the flywheel is for a setting process on the driving element, in particular the setting piston, which is also abbreviated as piston, transmitted.
  • the fastener is driven into the ground.
  • the flywheel is frictionally connected to the driving element, for example by means of a suitable coupling device.
  • the driving element between the flywheel and a counter-roller can be arranged.
  • the driving element is released from the flywheel by opening the coupling device.
  • the driving-in element can be returned to its initial position by a suitable return device, for example a spring device.
  • a preferred embodiment of the flywheel-driven setting tool is characterized in that the flywheel drive comprises two inner rotors, which are each rotatably arranged in a stator.
  • the two inner rotors of the preferably brushless internal rotor motors are advantageously arranged symmetrically, together with the stator devices, with respect to the flywheel.
  • the flywheel drive via two motor units, which share the inner rotor, gives the flywheel drive a high performance with a low total weight.
  • Coils or coil windings of the preferably brushless internal rotor motors can advantageously be arranged radially very far outside. This provides the advantage that in the coils or coil windings generated during operation heat can be dissipated directly to the environment. This reliably prevents heat accumulation inside the internal rotor motors.
  • Internal mechanically sensitive electromagnets of the internal rotor motors are Advantageously protected against undesirable high centrifugal accelerations or against strong shocks.
  • flywheel-driven setting tool is characterized in that the two inner rotors are non-rotatably connected to a rotor shaft which extends through the stator means.
  • the rotor shaft is rotatably mounted in the axial direction preferably outside the inner rotors and the stator devices, for example in a fixed support structure of the setting device by means of suitable storage facilities.
  • the inner rotors comprise permanent magnets which are rotatable radially within the stator means and cooperate with stator windings.
  • the permanent magnets on the rotor shaft interact via the stator devices, in particular via the coils or coil windings of the stator devices.
  • the inner rotors comprise rotor windings which are rotatable radially inside permanent magnets of the stator means.
  • the inner rotors may consist wholly or partly of rotor windings.
  • the stator devices may consist wholly or partly of permanent magnets.
  • flywheel driven setting tool is characterized in that the inner rotors comprise rotor windings which are rotatable radially inwardly of stator windings of the stator means.
  • a magnetic field is built up during operation of the internal rotor motor via the windings or coils formed by the windings.
  • a further preferred exemplary embodiment of the flywheel-driven setting tool is characterized in that air-guiding elements are provided on the stator devices, on the inner rotors and / or on the flywheel, which serve during operation of the internal rotor motors to generate a cooling air flow along the windings.
  • the air guide elements are, for example, fan plates.
  • a further preferred embodiment of the flywheel-driven setting tool is characterized in that the stator devices are arranged symmetrically to a central axis of the flywheel, which is connected in the axial direction between the stator means rotatably connected to the rotor shaft.
  • the central axis of the flywheel is perpendicular to its axis of rotation.
  • flywheel-driven setting tool is characterized in that a flywheel body is connected to form at least one annular cavity with one or the rotor shaft.
  • the annular cavity is represented, for example, by webs and / or spoke-like connections between the flywheel body and the rotor shaft.
  • flywheel-driven setting tool is characterized in that a flywheel body is connected via a drive disk to one or the rotor shaft.
  • the drive plate has, for example, the shape of a circular disk.
  • the flywheel body advantageously extends radially outward of the stator means in opposite axial directions. As a result, a relatively large flywheel mass can be displayed in a simple manner.
  • the internal rotor motor of the flywheel-driven setting device is equipped with Hall sensors for detecting a flywheel position and / or flywheel speed.
  • the information acquired with the Hall sensors enables individual windings to be electronically controlled in dependence on the inner rotor position in order to drive the internal rotor motors.
  • the invention also relates to a method for operating a flywheel-driven setting device described above.
  • the invention also relates to a flywheel, an inner rotor and / or a stator device for a previously described setting tool.
  • the parts mentioned are separately tradable.
  • FIG. 1 is a flywheel driven setting tool 1 shown simplified with a housing 2.
  • the housing 2 has a handle 4 with a trigger 5. Therefore, the setting tool 1 is also referred to as a hand-held setting tool or setting tool.
  • an accumulator 6 for storing electrical energy integrated.
  • the electrical energy of the accumulator 6 is used to drive an electric motor or an electric motor assembly 8.
  • the electric motor assembly 8 advantageously comprises two internal rotor motors. With the two internal rotor motors, the flywheel 9 is advantageously driven directly. About the two internal rotor motors, the flywheel 9 can be set quickly and with high torque in rotation.
  • the setting tool 1 further comprises a driving element 10 with a setting piston 12, which is shortened also referred to as a piston.
  • the driving element 10 and the setting piston 12 is disposed between the flywheel 9 and a counter-roller 11.
  • the counter-roller 11 can be designed with the flywheel 9 and the driving element 10 arranged therebetween, differently than shown, as a helical gear.
  • the setting piston 12 has at its in FIG. 1 left end of a piston tip 13 with which a fastener 14 at the setting end 15 of the setting device 1 in a (not shown) underground can be driven.
  • the fastening elements 14 are, for example, bolts or nails, which via a magazine 16 at the setting end 15 of the setting device. 1 preferably be provided automatically. Because in FIG. 1 arranged above in the magazine 16 fastener 14 is guided in a bolt guide 18.
  • the setting piston 12 or the driving element 10 is in the setting tool 1 by means of at least one piston guide 20 in the axial direction, ie in FIG. 1 to the left and to the right, moved back and forth.
  • the piston guide 20 comprises two guide rollers 21, 22.
  • To drive the fastener of the set piston 12 is moved with its piston tip 13 with great acceleration through the piston guide 20 to the fastener 14 to.
  • the setting piston 12 by means of a return spring 24 back into his in FIG. 1 shown starting position moves.
  • the setting tool 1 further comprises a wedge 25, which is movable with a plunger 26 by an electromagnet 27 to the counter-roller 11 in FIG. 1 to press down against the driving element 10.
  • a type of clutch is shown, which serves to frictionally connect the driving element 10 with the flywheel 9.
  • flywheel drives 40; 80 each having an electric motor assembly with two internal rotor motors 71, 72; 111, 112 include.
  • flywheel drive 40; 80 with the two internal rotor motors 71, 72; 111, 112 can be provided in a simple manner very quickly a sufficiently large setting energy in a reduced space, which via the flywheel 9 to a drive-in element 50; 90 can be transferred, which the driving element 10 in FIG. 1 equivalent.
  • flywheel drive 40 includes two inner rotors 41, 42 which are rotatable together about a rotation axis 43.
  • a flywheel 9 in FIG. 2 corresponds to the flywheel 9 in FIG. 1 ,
  • the flywheel 9 includes a flywheel body 44.
  • the flywheel body 44 has radially outward two annular grooves 45, 46, in which V-ribs 47, 48 engage.
  • the V-ribs 47, 48 are formed on an underside of the driving-in element 50.
  • the flywheel body 44 is rotatably connected to a rotor shaft 54 via exemplified webs 51, 52.
  • a ring cavity 55 is shown in an advantageous manner.
  • the annular cavity 55 is bounded radially outward by the flywheel body 44. Radially inside the cavity 55 is bounded by a rotor shaft 54. In axial directions of the annular cavity 55 is bounded by the webs 51, 52.
  • the inner rotors 41, 42 of the inner rotor motors 71, 72 are also non-rotatably connected to the rotor shaft 54.
  • By an arrow 56 a rotational movement of the rotor shaft 54 together with the flywheel body 44 and the inner rotors 41, 42 is indicated.
  • the rotor shaft 54 is in the axial direction outside, ie in FIG. 2 left and right, rotatably supported by bearings 58, 59.
  • the storage devices 58, 59 are preferably arranged fixed to the housing in the setting tool.
  • the inner rotor 41 is rotatably arranged in a stator 61 of the inner rotor motor 71. In the axial direction, the stator 61 and the inner rotor 41 between the bearing means 58 and the flywheel 9 are arranged.
  • the inner rotor 42 is rotatably arranged in a stator 62 of the inner rotor motor 72. In the axial direction, the stator 62 and the inner rotor 42 between the flywheel 9 and the bearing device 59 are arranged.
  • the stator means 61, 62 are symmetrically arranged and executed together with the inner rotors 41, 42.
  • stator devices 61, 62 are equipped with coil windings 63, 64, which are also referred to as stator windings.
  • the inner rotors 41, 42 are equipped with permanent magnets 65, 66 which cooperate with each other and with the stator windings 63, 64.
  • the two inner rotors 41, 42 of the inner rotor motors 71, 72 are rotatably connected to each other and to the flywheel 9 via the common rotor shaft 54.
  • the common rotor shaft 54 is rotatably supported by the bearing means 58, 59 in the housing of the setting device.
  • the stator means 61, 62 are fixedly mounted in the housing of the setting device and do not rotate.
  • stator windings 63, 64 of the stator devices 61, 62 are driven synchronously, the rotor shaft 54 is rotated due to an interaction between the stator windings 63, 64 and the permanent magnets 65, 66. This rotational movement is transmitted via the webs 51, 52 to the flywheel body 44 of the flywheel 9.
  • the rotational movement of the flywheel 9 is transmitted to drive the driving element 50 for driving a fastener. Due to the enormous power consumption when accelerating the flywheel 9, the stator windings 63, 64 are very hot. However, the waste heat occurring during the acceleration of the flywheel 9 can be simply released to the environment, for example via a fan on the rotor shaft 54.
  • flywheel drive 80 with the two internal rotor motors 111, 112 comprises two inner rotors 81, 82 which are rotatable about a rotation axis 83.
  • a flywheel 9, the flywheel 9 in FIG. 1 corresponds, comprises a flywheel body 84 having radially outwardly two annular grooves 85, 86. In the annular grooves 85, 86 engage V-ribs 87, 88, which are provided on an underside of a driving element 90.
  • the driving element 90 corresponds to the driving element 50 in FIG FIG. 2 ,
  • the flywheel body 84 of the flywheel 9 is different from that in FIG FIG. 2 shown flywheel 44 by a driver plate 91 rotatably connected to a rotor shaft 94.
  • the rotor shaft 94 is connected to the inner rotors 81, 82 and the drive plate 91 with the flywheel body 84 of the flywheel 9 in FIG. 3 rotatably mounted left and right by means of bearings 98, 99 in the housing of the setting device.
  • an arrow 100 a rotational movement of the rotor shaft 94 with the inner rotors 81, 82 and the flywheel 9 is indicated.
  • the inner rotors 81, 82 are in the same manner as in FIG FIG. 2 shown flywheel drive 40 radially within stator 101, 102nd rotatably arranged.
  • the stator devices 101, 102 are fixedly arranged in the housing of the setting device and provided with stator windings 103, 104.
  • flywheel drive 80 with the two internal rotor motors 111, 112 provides, inter alia, the advantage that it is compared to the flywheel from FIG. 2 builds more compact.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP16199460.3A 2016-11-18 2016-11-18 Appareil de pose entraîné par volant d'inertie Withdrawn EP3323562A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16199460.3A EP3323562A1 (fr) 2016-11-18 2016-11-18 Appareil de pose entraîné par volant d'inertie
EP17797356.7A EP3541576B1 (fr) 2016-11-18 2017-11-13 Appareil de pose entraîné par volant d'inertie
PCT/EP2017/079066 WO2018091414A1 (fr) 2016-11-18 2017-11-13 Pistolet de pose entraîné par volant d'inertie
US16/461,577 US20190366525A1 (en) 2016-11-18 2017-11-13 Flywheel-driven setting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16199460.3A EP3323562A1 (fr) 2016-11-18 2016-11-18 Appareil de pose entraîné par volant d'inertie

Publications (1)

Publication Number Publication Date
EP3323562A1 true EP3323562A1 (fr) 2018-05-23

Family

ID=57348545

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16199460.3A Withdrawn EP3323562A1 (fr) 2016-11-18 2016-11-18 Appareil de pose entraîné par volant d'inertie
EP17797356.7A Active EP3541576B1 (fr) 2016-11-18 2017-11-13 Appareil de pose entraîné par volant d'inertie

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17797356.7A Active EP3541576B1 (fr) 2016-11-18 2017-11-13 Appareil de pose entraîné par volant d'inertie

Country Status (3)

Country Link
US (1) US20190366525A1 (fr)
EP (2) EP3323562A1 (fr)
WO (1) WO2018091414A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005000077A1 (de) 2005-06-16 2006-12-21 Hilti Ag Elektrisch betriebenes Eintreibgerät
US20090194573A1 (en) * 2008-02-04 2009-08-06 Chia-Sheng Liang Actuator for Electrical Nail Gun
DE102009056347A1 (de) * 2009-11-30 2011-07-21 Karl Keppler Maschinenbau GmbH, 72793 Antriebskopf für NC-gesteuerte Stellbewegungen einer Werkzeugspindel
EP2127819B1 (fr) 2008-05-30 2012-01-18 Black & Decker, Inc. Outil entraînant une attache
EP2979821A1 (fr) * 2014-07-28 2016-02-03 Black & Decker, Inc. Mécanisme d'entraînement d'outil électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005000077A1 (de) 2005-06-16 2006-12-21 Hilti Ag Elektrisch betriebenes Eintreibgerät
US20090194573A1 (en) * 2008-02-04 2009-08-06 Chia-Sheng Liang Actuator for Electrical Nail Gun
EP2127819B1 (fr) 2008-05-30 2012-01-18 Black & Decker, Inc. Outil entraînant une attache
DE102009056347A1 (de) * 2009-11-30 2011-07-21 Karl Keppler Maschinenbau GmbH, 72793 Antriebskopf für NC-gesteuerte Stellbewegungen einer Werkzeugspindel
EP2979821A1 (fr) * 2014-07-28 2016-02-03 Black & Decker, Inc. Mécanisme d'entraînement d'outil électrique

Also Published As

Publication number Publication date
EP3541576B1 (fr) 2022-01-05
US20190366525A1 (en) 2019-12-05
EP3541576A1 (fr) 2019-09-25
WO2018091414A1 (fr) 2018-05-24

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