EP2524770B1 - Fastening device - Google Patents

Fastening device Download PDF

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Publication number
EP2524770B1
EP2524770B1 EP12164425.6A EP12164425A EP2524770B1 EP 2524770 B1 EP2524770 B1 EP 2524770B1 EP 12164425 A EP12164425 A EP 12164425A EP 2524770 B1 EP2524770 B1 EP 2524770B1
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EP
European Patent Office
Prior art keywords
driving tool
gas
spindle
motor
tool according
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EP12164425.6A
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German (de)
French (fr)
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EP2524770A2 (en
EP2524770A3 (en
Inventor
Karl Franz
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Hilti AG
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Hilti AG
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Publication of EP2524770A2 publication Critical patent/EP2524770A2/en
Publication of EP2524770A3 publication Critical patent/EP2524770A3/en
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    • 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
    • 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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • 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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/047—Mechanical details

Definitions

  • the invention relates to a tacker, in particular a hand-held tacker, according to the preamble of claim 1.
  • DE 196 29 762 A1 describes a driving tool for driving a nail into a workpiece in which a gas spring is biased by an electric motor to drive in a setting piston.
  • the tension of the spring can be done in different variants by a spindle, a lever or a cable.
  • the elastically compressible gas volume in the sense of the invention is understood to mean a volume whose pressure rises in the course of the tension of the gas spring.
  • the motor is particularly preferably an electric motor, so that in an advantageous detailed design only one passage of electrical supply lines to the gas volume must be sealed.
  • the clamping mechanism comprises a spindle, preferably a ball screw.
  • a ball screw provides a low-friction possibility of a strongly translated transformation of a rotary movement into a linear clamping movement.
  • the spindle is arranged within the gas volume, whereby forces are easily transferred from the spindle to the spring and a compact design of the tacker is possible.
  • the motor and the spindle are directly connected, wherein preferably the spindle extends on a rotation axis of the motor.
  • the spindle extends on a rotation axis of the motor.
  • no gear between engine and spindle is provided.
  • a ball nut of the spindle may be directly connected to a rotor of the motor and run around the axis of rotation of the motor.
  • such an arrangement is completely integrated into the gas volume.
  • the motor and the spindle are connected via a gear member.
  • This can be a gear stage, a belt drive, for example a toothed belt drive, simply and inexpensively, whereby at the same time a desired gear ratio can be provided. Space-saving advantageous while the engine can be arranged next to the spindle.
  • the gas spring in the relaxed state has a gas pressure of greater than 1 bar.
  • the compression ratio is reduced compared to a gas spring with low pressure and thus increases the energy density and possibly reduces the heating by compression.
  • the gas spring in the relaxed state a gas pressure of greater than 3 bar, more preferably greater than 10 bar.
  • the gas spring in the relaxed state a gas pressure of greater than 30 bar, preferably greater than 50 bar, on.
  • the tacker has a temperature sensor for measuring the temperature of the gas of the gas spring.
  • the temperature sensor is disposed within the gas volume.
  • the tacker has a control which regulates a clamping stroke of the gas spring in dependence on a temperature measured by the temperature sensor.
  • a decompression movement of the gas spring can be braked with the aid of the engine.
  • Fig. 1 shows a schematic sectional view of an embodiment.
  • Fig. 2 shows a schematic sectional view of an embodiment of the invention with arranged in the gas volume engine.
  • the tacker of the embodiment according to Fig. 1 comprises an outer housing 1 with a handle shell 2 and an actuator 3 arranged thereon for an operator.
  • a nail magazine 4 is arranged at a workpiece-side end, wherein nails from the nail magazine 4 can be driven by means of a setting piston 5 through an outlet 6 in a workpiece.
  • the gas spring 8 comprises a closed gas volume 9 encompassed by a housing wall 8a, 8b.
  • the air in the gas volume 9 is in accordance with the displacement of the setting piston 5 Fig. 1 elastically compressible to the right.
  • a tensioning mechanism 10 for tensioning the gas spring is partially arranged.
  • the tensioning mechanism 10 comprises a spindle, in the present ball screw, with a threaded shaft 11 and a ball nut 12.
  • the ball nut 12 is rotatably mounted stationary, being rotatably driven via a likewise arranged in the gas volume 9 gear member in the form of a belt drive 13.
  • One pulley of the belt drive 13 is non-rotatably connected to the ball nut 12, and the other pulley is seated on a shaft 14 which passes through the wall 8b of the gas volume. At this point, the shaft 14 is mounted and sealed in particular by means of a seal 15.
  • the shaft 14 leads to an outside of the gas volume arranged electric motor 16, by means of which ultimately the ball nut 12 of the spindle 11 is driven via the stepping belt drive 13.
  • the electric motor is connected via an electronic control unit 18 to an energy store 19.
  • the control unit is also in communication with the actuator 3 as a switch.
  • the spindle 11 is connected at its front end via a coupling 17 releasably connected to the set piston 5.
  • the spindle has a lock 19, which can lock in the tensioned state with a counterpart 20 releasably.
  • the counterpart 20 is arranged at the end of a narrow, cylindrical extension 21 of the housing wall 8b.
  • the setting piston can be released by releasing the clutch 17, whereby it is accelerated to the left and drives a nail into the workpiece via the driving rod 7.
  • the coupling may be released in any known manner, for example by advancing the spindle 11 from a cocked position against a triggering stop or the like.
  • the solution of the coupling can be initiated by an actuation of the actuator 3. After triggering or driving the spindle is moved back to its original position and the clutch 17 is locked with the setting piston 5.
  • the tacker has a temperature sensor 22 for measuring the temperature of the gas of the gas spring 8, which is arranged within the gas volume 9.
  • a controller not shown, controls a clamping stroke of the gas spring 8 in response to the temperature of the gas measured by the temperature sensor.
  • FIG. 2 In the embodiment shown, reference signs with the same meaning are used identically.
  • the electric motor 16 is disposed within the gas volume 9.
  • Fig. 2 shown is not the entire input device, but only the mechanics with gas spring 8, setting piston 5, 7 and tensioning mechanism 10. Shown is a strained state with maximally moved to the right setting piston 5.
  • the clamping mechanism 10, the spindle 11, 12, a spindle bearing 12a and the clutch 17 is completely disposed in the gas volume 9 in this example.
  • the ball nut 12 is directly connected to a rotor 16 a of the electric motor 16.
  • the spindle 11 extends through the center of the motor 16 and is co-linear with its rotary shaft.

Description

Die Erfindung betrifft ein Eintreibgerät, insbesondere ein handgeführtes Eintreibgerät, nach dem Oberbegriff des Anspruchs 1.The invention relates to a tacker, in particular a hand-held tacker, according to the preamble of claim 1.

DE 196 29 762 A1 beschreibt ein Eintreibgerät zum Eintreiben eines Nagels in ein Werkstück, bei dem eine Gasfeder durch einen Elektromotor vorgespannt wird, um einen Setzkolben einzutreiben. Die Spannung der Feder kann in verschiedenen Varianten durch eine Spindel, einen Hebel oder einen Seilzug erfolgen. DE 196 29 762 A1 describes a driving tool for driving a nail into a workpiece in which a gas spring is biased by an electric motor to drive in a setting piston. The tension of the spring can be done in different variants by a spindle, a lever or a cable.

Es ist die Aufgabe der Erfindung, ein Eintreibgerät anzugeben, das einen günstigen Bauraum aufweist.It is the object of the invention to provide a tacker that has a low installation space.

Diese Aufgabe wird für ein eingangs genanntes Eintreibgerät erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. Durch die Anordnung zumindest eines Teils der Spannmechanik und des Motors in dem Gasvolumen ist die Möglichkeit einer erheblichen Bauraumreduzierung gegeben. Unter dem elastisch komprimierbaren Gasvolumen im Sinne der Erfindung wird ein Volumen verstanden, dessen Druck im Zuge der Spannung der Gasfeder ansteigt.This object is achieved according to the invention for a drive-in device mentioned above with the characterizing features of claim 1. By arranging at least a part of the clamping mechanism and the engine in the gas volume, the possibility of a considerable space reduction is given. The elastically compressible gas volume in the sense of the invention is understood to mean a volume whose pressure rises in the course of the tension of the gas spring.

Bei einer möglichen Ausführungsform der Erfindung ist der Motor besonders bevorzugt ein Elektromotor, so dass in vorteilhafter Detailgestaltung nur eine Durchführung von elektrischen Zuleitungen zu dem Gasvolumen abgedichtet werden muss.In one possible embodiment of the invention, the motor is particularly preferably an electric motor, so that in an advantageous detailed design only one passage of electrical supply lines to the gas volume must be sealed.

Allgemein vorteilhaft ist es vorgesehen, dass die Spannmechanik eine Spindel, bevorzugt eine Kugelumlaufspindel, umfasst. Eine Kugelumlaufspindel stellt eine reibungsarme Möglichkeit einer stark übersetzten Umformung einer Drehbewegung in eine lineare Spannbewegung bereit. In vorteilhafter Detailgestaltung ist dabei die Spindel innerhalb des Gasvolumens angeordnet, wodurch Kräfte einfach von der Spindel auf die Feder übertragbar sind und eine kompakte Bauweise des Eintreibgeräts ermöglicht wird.Generally, it is provided that the clamping mechanism comprises a spindle, preferably a ball screw. A ball screw provides a low-friction possibility of a strongly translated transformation of a rotary movement into a linear clamping movement. In an advantageous detail design, the spindle is arranged within the gas volume, whereby forces are easily transferred from the spindle to the spring and a compact design of the tacker is possible.

Bei einer alternativen oder ergänzenden Ausführungsform sind der Motor und die Spindel unmittelbar verbunden, wobei bevorzugt die Spindel auf einer Drehachse des Motors verläuft. Unter einer unmittelbaren Verbindung ist dabei zu verstehen, dass kein Getriebe zwischen Motor und Spindel vorgesehen ist. Zum Beispiel kann eine Kugelumlaufmutter der Spindel unmittelbar mit einem Rotor des Motors verbunden sein und um die Drehachse des Motors laufen. Bevorzugt, aber nicht notwendig ist eine solche Anordnung vollständig in das Gasvolumen integriert.In an alternative or supplementary embodiment, the motor and the spindle are directly connected, wherein preferably the spindle extends on a rotation axis of the motor. Under a direct connection is to be understood that no gear between engine and spindle is provided. For example, a ball nut of the spindle may be directly connected to a rotor of the motor and run around the axis of rotation of the motor. Preferably, but not necessary, such an arrangement is completely integrated into the gas volume.

Bei einer hierzu alternativen Ausführungsform sind der Motor und die Spindel über ein Getriebeglied verbunden. Einfach und kostengünstig kann dies eine Zahnradstufe, ein Riemenantrieb, zum Beispiel Zahnriemenantrieb, sein, wodurch zugleich eine gewünschte Übersetzung bereitgestellt werden kann. Raumsparend vorteilhaft kann dabei der Motor neben der Spindel angeordnet sein.In an alternative embodiment, the motor and the spindle are connected via a gear member. This can be a gear stage, a belt drive, for example a toothed belt drive, simply and inexpensively, whereby at the same time a desired gear ratio can be provided. Space-saving advantageous while the engine can be arranged next to the spindle.

Bei einer möglichen Ausführungsform der Erfindung weist die Gasfeder im entspannten Zustand einen Gasdruck von grösser als 1 bar auf. Bei einer solchen Hochdruckgasfeder ist gegenüber einer Gasfeder mit niedrigem Druck das Kompressionsverhältnis reduziert und somit die Energiedichte erhöht und unter Umständen die Erwärmung durch Kompression reduziert. Bevorzugt weist die Gasfeder im entspannten Zustand einen Gasdruck von grösser als 3 bar, besonders bevorzugt grösser als 10 bar auf. Bei einer besonders bevorzugten Ausführungsform weist die Gasfeder im entspannten Zustand einen Gasdruck von grösser als 30 bar, bevorzugt grösser als 50 bar, auf.In one possible embodiment of the invention, the gas spring in the relaxed state has a gas pressure of greater than 1 bar. In such a high-pressure gas spring, the compression ratio is reduced compared to a gas spring with low pressure and thus increases the energy density and possibly reduces the heating by compression. Preferably, the gas spring in the relaxed state, a gas pressure of greater than 3 bar, more preferably greater than 10 bar. In a particularly preferred embodiment, the gas spring in the relaxed state, a gas pressure of greater than 30 bar, preferably greater than 50 bar, on.

Bei einer möglichen Ausführungsform der Erfindung weist das Eintreibgerät einen Temperatursensor zur Messung der Temperatur des Gases der Gasfeder auf. Bevorzugt ist der Temperatursensor innerhalb des Gasvolumens angeordnet ist. Besonders bevorzugt weist das Eintreibgerät eine Steuerung auf, welche einen Spannhub der Gasfeder in Abhängigkeit von einer von dem Temperatursensor gemessenen Temperatur regelt.In one possible embodiment of the invention, the tacker has a temperature sensor for measuring the temperature of the gas of the gas spring. Preferably, the temperature sensor is disposed within the gas volume. Particularly preferably, the tacker has a control which regulates a clamping stroke of the gas spring in dependence on a temperature measured by the temperature sensor.

Dadurch können unerwünschte Temperaturschwankungen des Gases, beispielsweise durch Abwärme des Motors, ausgeglichen werden, welche ansonsten die Eintreibenergie beeinflussen.As a result, unwanted temperature fluctuations of the gas, for example by waste heat of the engine, can be compensated, which otherwise influence the driving-in energy.

Bei einer möglichen Ausführungsform der Erfindung ist eine Entspannbewegung der Gasfeder mit Hilfe des Motors abbremsbar.In one possible embodiment of the invention, a decompression movement of the gas spring can be braked with the aid of the engine.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Ausführungsbeispielen sowie aus den abhängigen Ansprüchen. Nachfolgend werden zwei bevorzugte Ausführungsbeispiele der Erfindung beschrieben und anhand der anliegenden Zeichnungen näher erläutert.Fig. 1 zeigt eine schematische Schnittansicht eines Ausführungsbeispiels. Fig. 2 zeigt eine schematische Schnittansicht eines Ausführungsbeispiels der Erfindung mit im Gasvolumen angeordnetem Motor.Further features and advantages of the invention will become apparent from the embodiments and from the dependent claims. Hereinafter, two preferred embodiments of the invention will be described and explained in more detail with reference to the accompanying drawings. Fig. 1 shows a schematic sectional view of an embodiment. Fig. 2 shows a schematic sectional view of an embodiment of the invention with arranged in the gas volume engine.

Das Eintreibgerät der Ausführungsform nach Fig. 1 umfasst ein Außengehäuse 1 mit einer Griffschale 2 und einem daran angeordneten Betätigungsglied 3 für eine Bedienperson. Ein Nagelmagazin 4 ist an einem werkstückseitigen Ende angeordnet, wobei Nägel aus dem Nagelmagazin 4 mittels eines Setzkolbens 5 durch einen Austritt 6 in ein Werkstück eintreibbar sind.The tacker of the embodiment according to Fig. 1 comprises an outer housing 1 with a handle shell 2 and an actuator 3 arranged thereon for an operator. A nail magazine 4 is arranged at a workpiece-side end, wherein nails from the nail magazine 4 can be driven by means of a setting piston 5 through an outlet 6 in a workpiece.

An dem Setzkolben 5 ist eine Eintreibstange 7 angeordnet, wobei der Setzkolben 5 mittels einer Dichtung 5a, gegen die Innenwand eines zylindrischen Abschnitts 8a einer Gasfeder 8 abgedichtet ist. Die Gasfeder 8 umfasst ein von einer Gehäusewand 8a, 8b umfangenes, geschlossenes Gasvolumen 9. Die in dem Gasvolumen 9 befindliche Luft ist durch Auslenkung des Setzkolbens 5 gemäß Fig. 1 nach rechts elastisch komprimierbar.On the setting piston 5 a driving rod 7 is arranged, wherein the setting piston 5 is sealed by means of a seal 5a, against the inner wall of a cylindrical portion 8a of a gas spring 8. The gas spring 8 comprises a closed gas volume 9 encompassed by a housing wall 8a, 8b. The air in the gas volume 9 is in accordance with the displacement of the setting piston 5 Fig. 1 elastically compressible to the right.

In dem Gasvolumen 9 ist eine Spannmechanik 10 zur Spannung der Gasfeder teilweise angeordnet. Die Spannmechanik 10 umfasst eine Spindel, vorliegend Kugelumlaufspindel, mit einem Gewindeschaft 11 und einer Kugelumlaufmutter 12. Die Kugelumlaufmutter 12 ist ortsfest drehbar gelagert, wobei sie über einen ebenfalls in dem Gasvolumen 9 angeordnetes Getriebeglied in Form eines Riemenantriebs 13 angetrieben drehbar ist.In the gas volume 9, a tensioning mechanism 10 for tensioning the gas spring is partially arranged. The tensioning mechanism 10 comprises a spindle, in the present ball screw, with a threaded shaft 11 and a ball nut 12. The ball nut 12 is rotatably mounted stationary, being rotatably driven via a likewise arranged in the gas volume 9 gear member in the form of a belt drive 13.

Eine Scheibe des Riemenantriebs 13 ist drehfest mit der Kugelumlaufmutter 12 verbunden, und die andere Scheibe sitzt auf einer Welle 14, die durch die Wand 8b des Gasvolumens durchtritt. An dieser Stelle ist die Welle 14 gelagert und insbesondere mittels einer Dichtung 15 abgedichtet.One pulley of the belt drive 13 is non-rotatably connected to the ball nut 12, and the other pulley is seated on a shaft 14 which passes through the wall 8b of the gas volume. At this point, the shaft 14 is mounted and sealed in particular by means of a seal 15.

Die Welle 14 führt zu einem außerhalb des Gasvolumens angeordneten Elektromotor 16, mittels dessen letztlich die Kugelumlaufmutter 12 der Spindel 11 über den untersetzenden Riemenantrieb 13 angetrieben wird. Der Elektromotor ist über eine elektronische Steuereinheit 18 mit einem Energiespeicher 19 verbunden. Die Steuereinheit steht zudem mit dem Betätigungsglied 3 als Schalter in Verbindung.The shaft 14 leads to an outside of the gas volume arranged electric motor 16, by means of which ultimately the ball nut 12 of the spindle 11 is driven via the stepping belt drive 13. The electric motor is connected via an electronic control unit 18 to an energy store 19. The control unit is also in communication with the actuator 3 as a switch.

Ferner ist die Spindel 11 an ihrem vorderen Ende über eine Kupplung 17 lösbar mit dem Setzkolben 5 verbunden. An einem hinteren, entgegen gesetzten Ende hat die Spindel ein Schloss 19, das im gespannten Zustand mit einem Gegenstück 20 lösbar verrasten kann. Das Gegenstück 20 ist am Ende eines schmalen, zylindrischen Fortsatzes 21 der Gehäusewand 8b angeordnet. Beim Spannen der Gasfeder 8 wird der Setzkolben 5 zusammen mit der daran angekoppelten Spindel 11 unter Komprimierung des Gases in dem Gasvolumen 9 nach rechts bewegt, wobei die Spindel in den Fortsatz 21 einfährt. Am Ende der Spannbewegung rastet das Schloss 19 an dem Gegenstück 20 ein, so dass die Spindel gehalten wird.Further, the spindle 11 is connected at its front end via a coupling 17 releasably connected to the set piston 5. At a rear, opposite end, the spindle has a lock 19, which can lock in the tensioned state with a counterpart 20 releasably. The counterpart 20 is arranged at the end of a narrow, cylindrical extension 21 of the housing wall 8b. When tensioning the gas spring 8, the setting piston 5 is moved together with the coupled thereto spindle 11 with compression of the gas in the gas volume 9 to the right, wherein the spindle enters the extension 21. At the end of the clamping movement, the lock 19 locks on the counterpart 20, so that the spindle is held.

Aus diesem gespannten Zustand heraus kann der Setzkolben durch Lösen der Kupplung 17 freigegeben werden, wodurch er nach links beschleunigt wird und über die Eintreibstange 7 einen Nagel in das Werkstück treibt. Die Kupplung kann auf jede bekannte Weise gelöst werden, zum Beispiel durch Weiterbewegen der Spindel 11 aus einer gespannten Position gegen einen auslösenden Anschlag oder Ähnliches. Die Lösung der Kupplung kann durch eine Betätigung des Betätigungsglieds 3 eingeleitet werden. Nach dem Auslösen bzw. Eintreiben wird die Spindel wieder in ihre Ursprungsposition verfahren und die Kupplung 17 mit dem Setzkolben 5 verrastet.From this tensioned state, the setting piston can be released by releasing the clutch 17, whereby it is accelerated to the left and drives a nail into the workpiece via the driving rod 7. The coupling may be released in any known manner, for example by advancing the spindle 11 from a cocked position against a triggering stop or the like. The solution of the coupling can be initiated by an actuation of the actuator 3. After triggering or driving the spindle is moved back to its original position and the clutch 17 is locked with the setting piston 5.

Weiterhin weist das Eintreibgerät einen Temperatursensor 22 zur Messung der Temperatur des Gases der Gasfeder 8 auf, welcher innerhalb des Gasvolumens 9 angeordnet ist. Eine nicht dargestellte Steuerung regelt einen Spannhub der Gasfeder 8 in Abhängigkeit von der von dem Temperatursensor gemessenen Temperatur des Gases regelt.Furthermore, the tacker has a temperature sensor 22 for measuring the temperature of the gas of the gas spring 8, which is arranged within the gas volume 9. A controller, not shown, controls a clamping stroke of the gas spring 8 in response to the temperature of the gas measured by the temperature sensor.

Bei dem in Fig. 2 gezeigten Ausführungsbeispiel werden Bezugszeichen mit gleicher Bedeutung identisch verwendet. Im Unterschied zum Beispiel nach Fig. 1 ist nicht nur die Spindel 11, sondern auch der Elektromotor 16 innerhalb des Gasvolumens 9 angeordnet. In Fig. 2 dargestellt ist nicht das gesamte Eintriebgerät, sondern nur die Mechanik mit Gasfeder 8, Setzkolben 5, 7 und Spannmechanik 10. Dargestellt ist ein gespannter Zustand mit maximal nach rechts verfahrenem Setzkolben 5. Die Spannmechanik 10, die Spindel 11, 12, ein Spindellager 12a und die Kupplung 17 umfasst, ist bei diesem Beispiel vollständig in dem Gasvolumen 9 angeordnet.At the in Fig. 2 In the embodiment shown, reference signs with the same meaning are used identically. In contrast to the example below Fig. 1 not only the spindle 11, but also the electric motor 16 is disposed within the gas volume 9. In Fig. 2 shown is not the entire input device, but only the mechanics with gas spring 8, setting piston 5, 7 and tensioning mechanism 10. Shown is a strained state with maximally moved to the right setting piston 5. The clamping mechanism 10, the spindle 11, 12, a spindle bearing 12a and the clutch 17 is completely disposed in the gas volume 9 in this example.

Die Kugelumlaufmutter 12 ist unmittelbar mit einem Rotor 16a des Elektromotors 16 verbunden. Die Spindel 11 erstreckt sich durch die Mitte des Motors 16 und verläuft kolinear mit dessen Drehwelle.The ball nut 12 is directly connected to a rotor 16 a of the electric motor 16. The spindle 11 extends through the center of the motor 16 and is co-linear with its rotary shaft.

Bei dieser Ausführungsform ist keine Abdichtung eines bewegten mechanischen Teils gegenüber dem Gehäuse 8a, 8b des Gasvolumens 9 erforderlich. Allenfalls die gasdichte Durchführung von elektrischen Zuleitungen muss vorgesehen werden (nicht dargestellt).In this embodiment, no sealing of a moving mechanical part relative to the housing 8a, 8b of the gas volume 9 is required. At most, the gas-tight implementation of electrical leads must be provided (not shown).

Claims (10)

  1. Driving tool, comprising
    a rotary motor (16), in particular an electric motor,
    a gas spring (8) having an elastically compressible gas volume (9) and
    a setting piston (5),
    wherein the gas spring (8) can be tensioned by the motor via a tensioning mechanism (10) in order to accelerate the setting piston (5) in a setting direction after release from the tensioned state and
    wherein at least part of the tensioning mechanism (10) is arranged within the gas volume of the gas spring (8),
    characterised in that the motor (16) is also arranged within the gas volume (9) of the gas spring (8).
  2. Driving tool according to claim 1, characterised in that the tensioning mechanism (10) comprises a spindle (11, 12), in particular a recirculating ball screw.
  3. Driving tool according to claim 2, characterised in that the spindle (11, 12) is arranged within the gas volume (9).
  4. Driving tool according to claim 3, characterised in that the motor (16) and the spindle (11, 12) are directly connected, in particular, the spindle (11, 12) extending along an axis of rotation of the motor.
  5. Driving tool according to claim 3, characterised in that the motor (16) and the spindle (11, 12) are connected via a gear element (13), in particular a gear stage or a belt drive, in particular, the motor (16) being arranged alongside the spindle (11, 12).
  6. Driving tool according to one of the preceding claims, characterised in that the gas spring in the relaxed state has a gas pressure greater than 1 bar, in particular greater than 3 bar, in particular greater than 10 bar, in particular greater than 30 bar.
  7. Driving tool according to one of the preceding claims, characterised in that the driving tool has a temperature sensor for measuring the temperature of the gas of the gas spring.
  8. Driving tool according to claim 7, characterised in that the temperature sensor is arranged within the gas volume.
  9. Driving tool according to one of claims 7 and 8, characterised in that the driving tool has a controller that controls the tensioning stroke of the gas spring as a function of the temperature measured by the temperature sensor.
  10. Driving tool according to one of the preceding claims, characterised in that the relaxing movement of the gas spring can be slowed down with the aid of the motor.
EP12164425.6A 2011-05-19 2012-04-17 Fastening device Active EP2524770B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011076087A DE102011076087A1 (en) 2011-05-19 2011-05-19 tacker

Publications (3)

Publication Number Publication Date
EP2524770A2 EP2524770A2 (en) 2012-11-21
EP2524770A3 EP2524770A3 (en) 2018-02-14
EP2524770B1 true EP2524770B1 (en) 2019-08-14

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EP12164425.6A Active EP2524770B1 (en) 2011-05-19 2012-04-17 Fastening device

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US (2) US9463561B2 (en)
EP (1) EP2524770B1 (en)
JP (1) JP6075909B2 (en)
CN (1) CN102794744B (en)
AU (1) AU2012202800B2 (en)
CA (1) CA2776014A1 (en)
DE (1) DE102011076087A1 (en)
TW (1) TWI611878B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2875902A1 (en) 2013-11-26 2015-05-27 HILTI Aktiengesellschaft Setting device with temperature sensor
EP3000560A1 (en) * 2014-09-25 2016-03-30 HILTI Aktiengesellschaft Driving device with gas spring
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US9463561B2 (en) 2016-10-11
US20160368127A1 (en) 2016-12-22
CN102794744A (en) 2012-11-28
JP6075909B2 (en) 2017-02-08
EP2524770A2 (en) 2012-11-21
EP2524770A3 (en) 2018-02-14
TWI611878B (en) 2018-01-21
DE102011076087A1 (en) 2012-11-22
JP2012240193A (en) 2012-12-10
AU2012202800A1 (en) 2012-12-06
TW201304913A (en) 2013-02-01
US9776312B2 (en) 2017-10-03
AU2012202800B2 (en) 2014-05-01
US20120292064A1 (en) 2012-11-22
CN102794744B (en) 2018-06-08
CA2776014A1 (en) 2012-11-19

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