EP3122515B1 - Pyrotechnic fastening device - Google Patents
Pyrotechnic fastening device Download PDFInfo
- Publication number
- EP3122515B1 EP3122515B1 EP15711764.9A EP15711764A EP3122515B1 EP 3122515 B1 EP3122515 B1 EP 3122515B1 EP 15711764 A EP15711764 A EP 15711764A EP 3122515 B1 EP3122515 B1 EP 3122515B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slider
- central axis
- combustion chamber
- driving device
- piston
- 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.)
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Links
- 238000002485 combustion reaction Methods 0.000 claims description 39
- 239000003380 propellant Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
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
- B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
- B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
- B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
- B25C1/143—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil trigger operated
Definitions
- the invention relates to a tacker according to the preamble of claim 1.
- Hand-held driving devices with propellant charge are known from the prior art, in which after ignition of a pyrotechnic charge, the resulting fuel gases expand in a combustion chamber. As a result, a piston is accelerated as energy transfer means and drives a fastener into a workpiece.
- US 6,321,968 B1 describes a tacker with a propellant charge, in which the combustion chamber is separated by means of a perforated disc in an upper part of the chamber and a lower sub-chamber. The tacker has an adjustability of a dead space volume to adjust the Einandergie the device adjustable.
- a valve-like slide can be adjusted in a direction perpendicular to a driving axis.
- the combustion chamber in the closed position of the slide on a dead space, which is formed as a recess in a side wall of the combustion chamber.
- Other tackers are also out DE 1478826 A1 .
- a substantially cylindrical sleeve can be understood as the central axis of completely rotating bodies.
- the piston member may be guided in the slider at least over a first part of its movement.
- a variable release of the Abblaskanals or more Abblaskanäle can be done depending on detail by an adjustment of the slider in an axial direction and / or in the circumferential direction.
- a arranged in front of the combustion chamber piston guide is rotatably received relative to the housing about the central axis.
- the piston guide and the slide are rotatably coupled together and axially movable relative to each other.
- the piston guide fulfills an additional function as a mechanical link between the slider and a control panel.
- a blow-off channel in the sense of the invention is any space which can be added to the combustion chamber volume by the adjusting member in such a way as to change a driving energy in a defined manner via the additional expansion space.
- the Abblaskanal can be connected to an outside space.
- the blow-off channel may also be a dead space volume not connected to an exterior space.
- a driving energy is understood to mean the kinetic energy of a given fastening element for a given propellant charge. Upon specification of these boundary conditions, it is possible by the actuator to adjust the resulting driving energy of the fastener adjustable.
- a piston member according to the invention is any means that is acted upon by the ignition of the charge with kinetic energy, wherein the kinetic energy is ultimately transmitted to the fastener.
- the piston member is designed as a particular cylindrical piston.
- recesses or other structures may be provided which further promote turbulence and uniform expansion of the fuel gases.
- a central axis in the sense of the invention is an axis at least parallel to the movement of the fastening element, which passes through a center of the combustion chamber runs.
- the central axis extends through both the center of the combustion chamber and through a center of the fastener.
- any retractable anchoring such as nail, bolt or screw understood.
- the slider is rotatable about the central axis to adjust a cross section of the Abblaskanals.
- the slider is supported in a positive guide, wherein a rotation of the slider about the central axis causes a movement of the slider in the direction of the central axis.
- the positive guide comprises a preferably multi-start thread, a link or a sliding block.
- the slide has a preferably cylindrical inner wall, which is formed as part of the combustion chamber.
- the slide is also useful a guide of the piston member in a first portion of the piston movement.
- the actuator has a pivotable about the central axis control panel.
- the control panel may be any suitable means for manual adjustment, such as a rotatable sleeve as a particularly preferred variant, a pivotable knob or the like.
- the operating part is designed as an annular sleeve, wherein the sleeve surrounds the central axis.
- the sleeve can be rotated in several different positions, wherein at least two different positions are assigned to two different drive energies.
- the sleeve by means of a locking member in at least one defined position be held.
- Such defined positions may be a maintenance position or a defined position for changing the driving energy.
- An inventive control panel and in particular a sleeve described above can be arranged to optimize the ergonomics of the device in a front area in front of a handle of the device. This can result in arrangement and design of the control panel an advantageous analogy to known controls of hand-held drills and / or cordless screwdrivers.
- the controls of such devices are used according to other purposes, such as a torque adjustment or a change from screwing to hammer operation in a percussion drill.
- a pivoting of the operating part about the central axis means a substantially perpendicular to the axis oriented deflection of the control panel from a previous position.
- a movement line or trajectory of the operating part has a radius of curvature, which is preferably not smaller than a distance of the operating part from the central axis.
- the pivoting is a rotation about the central axis.
- control panel and the slider are rotatably connected, so that a rotation of the control panel at the same time causes a rotation and adjustment of the slider for regulating the driving energy.
- the slider has a collar which runs around the central axis and overlaps into a recess of a combustion chamber housing, at least part of the blow-off channel being formed as an axially extending recess between the collar and the combustion chamber housing.
- a drive-in device comprises a hand-guided housing 1, in which a piston member in the form of a piston 2 is accommodated.
- a surface 2a of the piston 2 defines a combustion chamber 3 in which the combustion gases of a pyrotechnic charge expand to accelerate the piston 2.
- the fastening element may in particular be accommodated in a module or magazine (not shown) that is interchangeable in a front holding region 1a of the tacker device 1.
- the charge is presently received in a cartridge 4a made of sheet metal.
- the cartridge 4a has an impact fuse and is inserted into a cartridge bearing 4 before ignition via a corresponding loading mechanism, in the present case by means of a magazine strip.
- the cartridge and the cartridge bearing 4 are rotationally symmetrical about one Central axis A formed.
- the central axis A is in the present examples at the same time a central axis of the combustion chamber 3 and the piston member. 2
- the combustion chamber 3 is arranged between a circular opening of the cartridge bearing 4 and the surface 2 a of the piston 2.
- a depression 2b is formed in the piston 2, which contributes to a better turbulence of the combustion gases and forms part of the boundary of the combustion chamber 3.
- the combustion chamber 3 is formed in a first section as a hollow cylindrical, substantially sleeve-shaped body 6.
- This body 6 is at the same time as a rotatable about the central axis A and thereby in its position in the direction of the central axis A variable slide for adjustable release of one or more Abblaskanäle 7 formed with, for example, stepped cross-section.
- the exhaust duct 7 comprises a plurality of recesses 7a in a combustion chamber housing 8 distributed over the circumference.
- the recesses 7a extend axially in the direction parallel to the central axis A and open into a section of the exhaust duct 7 with a larger volume running between the combustion chamber housing 8 and a piston guide 5.
- a cylindrical recess with a multi-start internal thread 8a In the combustion chamber housing 8 is located in the region of the combustion chamber, a cylindrical recess with a multi-start internal thread 8a.
- the slider 6 is screwed with a corresponding external thread 6a in the opening of the combustion chamber housing 8. A rotation of the slider 6 about the central axis A thus causes a positively controlled axial displacement of the slider. 6
- the slide 6 is provided with a collar 6b which extends to the rear or in the direction of a bottom of the combustion chamber 3 and engages in the recess of the combustion-chamber housing 8 in an axially overlapping manner.
- a variable passage 9 is thus released from the combustion chamber 3 into the recesses or blow-off channels 7a (see FIG Fig. 5 ).
- the passage 9 is closed when completely displaced to the rear slider 6 (see Fig. 6 ). If an opened passage 9 is set, then this is a part of the blow-off duct 7a, 7.
- the passage is arranged in the axial direction immediately before the bottom of the combustion chamber 3, so that combustion gases can escape into the blow-off duct immediately at the beginning of the piston movement. hereby Depending on the setting of the slide 6, a particularly large area of energy reduction can be achieved.
- a guide of the piston 2 takes place both in the slide 6 and in the slide 6 in the direction of drive subsequent piston guide 5.
- the piston guide 5 is rotatably received in the combustion chamber housing about the central axis A.
- the piston guide 5 is coupled by means of two jaws 5a with the slider 6, wherein the axially projecting claws 5a in two corresponding recesses 6d in the slide 6 rotatably, but axially displaceable engage (see Fig. 10 ).
- the piston guide is coupled by means of one, three, four, five or more claws with the slider.
- the length of the slider 6 is correspondingly dimensioned so that the maximum desired driving energy is achieved before the rear end of the piston member 2 sweeps over the gap.
- the gap also connects the combustion chamber to the blow-off channel 7.
- a front end of the piston guide 5 is rotatably coupled to a control panel 10. so that the piston guide 5 at the same time forms a mechanical connection between the operating part 10 and the slide 6.
- the operating part 10 is designed as a sleeve rotatable in the combustion chamber housing, which sleeve is arranged substantially concentrically around the central axis A in a front region of the housing 1 of the tacking device.
- the operating part 10 together with the piston guide 5 and the slide 6, an actuator for changing the driving force of the tacker 1 from.
- This adjustment and the drive operation work as follows: After a Eintreibvorgang the piston member is in a partially undefined, but largely shifted forward position.
- the combustion chamber housing 8 is located in a maximally pushed back into the tacker in position.
- the terms "front” and "rear” are always selected with reference to the driving direction.
- the desired driving energy is set as the energy level marked on the operating part by rotating the sleeve 10. This leads via the positive control described above to a selected axial positioning of the slide 6 relative to the combustion chamber housing 8. As a result, the blow-off channel is released or closed defined via the passage 9 (maximum driving energy).
- a corresponding part of the propellant gases or exhaust gases is discharged to the outside via the described channels 7a, 7.
- a closed dead space volume may be provided, for example, the Abblaskanäle 7a serve only as an optional room extension of the combustion chamber and are not connected further to the outside.
- the gases guided via the blow-off ducts are used for a piston return by means of gas pressure.
- a disassembly of the piston member 2 and the combustion chamber housing 8 by means of an additional locking ring 11 is made possible, which is arranged behind the control unit 10.
- the lock ring carries a button 10a, which serves to secure the control panel 10 and must be pressed to adjust the control panel.
- the locking ring 11 is secured in a similar manner via a button 11 a to the housing of the tacker 1.
- the above-mentioned function for disassembling the tacker can also be integrated into the operating part 10.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
Description
Die Erfindung betrifft ein Eintreibgerät nach dem Oberbegriff des Anspruchs 1.
Aus dem Stand der Technik sind handgeführte Eintreibgeräte mit Treibladungen bekannt, bei denen nach der Zündung einer pyrotechnischen Ladung die resultierenden Brenngase in einer Brennkammer expandieren. Hierdurch wird ein Kolben als Energieübertragungsmittel beschleunigt und treibt ein Befestigungselement in ein Werkstück ein.
Diese Aufgabe wird für eine eingangs genannte Eintreibvorrichtung erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. Durch die Ausbildung des Schiebers als die Zentralachse vollständig umlaufender Körper kann die Freigabe des Abblaskanals mechanisch stabil und über einen weiten Regelbereich realisiert werden.The invention relates to a tacker according to the preamble of
Hand-held driving devices with propellant charge are known from the prior art, in which after ignition of a pyrotechnic charge, the resulting fuel gases expand in a combustion chamber. As a result, a piston is accelerated as energy transfer means and drives a fastener into a workpiece.
This object is achieved according to the invention for a drive-in device mentioned above with the characterizing features of
Als die Zentralachse vollständig umlaufender Körper kann zum Beispiel eine im Wesentlichen zylindrische Hülse verstanden werden. Allgemein bevorzugt kann das Kolbenglied zumindest über einen ersten Teil seiner Bewegung in dem Schieber geführt sein. Eine veränderbare Freigabe des Abblaskanals oder mehrerer Abblaskanäle kann je nach Detailgestaltung durch eine Verstellung des Schiebers in einer axialen Richtung und/oder in Umfangsrichtung erfolgen.For example, a substantially cylindrical sleeve can be understood as the central axis of completely rotating bodies. Generally preferably, the piston member may be guided in the slider at least over a first part of its movement. A variable release of the Abblaskanals or more Abblaskanäle can be done depending on detail by an adjustment of the slider in an axial direction and / or in the circumferential direction.
Eine vor der Brennkammer angeordnete Kolbenführung ist relativ zu dem Gehäuse um die Zentralachse verdrehbar aufgenommen. Dabei sind die Kolbenführung und der Schieber drehfest miteinander verkoppelt und axial zueinander bewegbar. Auf diese Weise erfüllt die Kolbenführung eine zusätzliche Funktion als mechanisches Verbindungsglied zwischen dem Schieber und einem Bedienteil.A arranged in front of the combustion chamber piston guide is rotatably received relative to the housing about the central axis. The piston guide and the slide are rotatably coupled together and axially movable relative to each other. In this way, the piston guide fulfills an additional function as a mechanical link between the slider and a control panel.
Ein Abblaskanal im Sinne der Erfindung ist jeder Raum, der durch das Einstellglied selektierbar zu dem Brennkammervolumen hinzugefügt werden kann, um über den zusätzlichen Expansionsraum eine Eintreibenergie definiert zu verändern. Bevorzugt, aber nicht notwendig, kann der Abblaskanal dabei mit einem Außenraum verbunden sein. Alternativ oder ergänzend hierzu kann es sich bei dem Abblaskanal auch um ein nicht mit einem Außenraum verbundenes Totraumvolumen handeln.A blow-off channel in the sense of the invention is any space which can be added to the combustion chamber volume by the adjusting member in such a way as to change a driving energy in a defined manner via the additional expansion space. Preferably, but not necessary, the Abblaskanal can be connected to an outside space. Alternatively or additionally, the blow-off channel may also be a dead space volume not connected to an exterior space.
Unter einer Eintreibenergie wird im Sinne der Erfindung die Bewegungsenergie eines gegebenen Befestigungselements bei gegebener Treibladung verstanden. Bei Vorgabe dieser Randbedingungen ist es durch das Stellglied ermöglicht, die resultierende Eintreibenergie des Befestigungselements einstellbar zu verändern.In the context of the invention, a driving energy is understood to mean the kinetic energy of a given fastening element for a given propellant charge. Upon specification of these boundary conditions, it is possible by the actuator to adjust the resulting driving energy of the fastener adjustable.
Ein Kolbenglied im Sinne der Erfindung ist jedes Mittel, das durch die Zündung der Ladung mit Bewegungsenergie beaufschlagt wird, wobei die Bewegungsenergie letztlich auf das Befestigungselement übertragen wird. Häufig ist das Kolbenglied als insbesondere zylindrischer Kolben ausgeführt. In dem Kolbenboden können Aussparungen oder andere Strukturen vorgesehen sein, die eine Verwirbelung und gleichmäßige Expansion der Brenngase weiter begünstigen.A piston member according to the invention is any means that is acted upon by the ignition of the charge with kinetic energy, wherein the kinetic energy is ultimately transmitted to the fastener. Often the piston member is designed as a particular cylindrical piston. In the piston head recesses or other structures may be provided which further promote turbulence and uniform expansion of the fuel gases.
Eine Zentralachse im Sinne der Erfindung ist eine zu der Bewegung des Befestigungselements zumindest parallele Achse, die durch eine Mitte der Brennkammer verläuft. Bevorzugt verläuft die Zentralachse sowohl durch die Mitte der Brennkammer als auch durch eine Mitte des Befestigungselements.A central axis in the sense of the invention is an axis at least parallel to the movement of the fastening element, which passes through a center of the combustion chamber runs. Preferably, the central axis extends through both the center of the combustion chamber and through a center of the fastener.
Unter einem Befestigungselement im Sinne der Erfindung wird allgemein jede eintreibbare Verankerung, wie zum Beispiel Nagel, Bolzen oder Schraube, verstanden.Under a fastener according to the invention is generally understood any retractable anchoring, such as nail, bolt or screw understood.
Bei einer bevorzugten Ausführungsform der Erfindung ist der Schieber um die Zentralachse verdrehbar, um einen Querschnitt des Abblaskanals einzustellen. Besonders bevorzugt ist der Schieber dabei in einer Zwangsführung abgestützt, wobei eine Drehung des Schiebers um die Zentralachse eine Bewegung des Schiebers in Richtung der Zentralachse bewirkt. Auf diese Weise kann die axiale Verstellung besonders genau erfolgen. Bei einer besonders bevorzugten Detailgestaltung umfasst die Zwangsführung ein bevorzugt mehrgängiges Gewinde, eine Kulisse oder einen Nutenstein. Hierdurch kann beispielsweise eine große Gewindesteigung mit einer mechanisch sicheren Führung kombiniert werden.In a preferred embodiment of the invention, the slider is rotatable about the central axis to adjust a cross section of the Abblaskanals. Particularly preferably, the slider is supported in a positive guide, wherein a rotation of the slider about the central axis causes a movement of the slider in the direction of the central axis. In this way, the axial adjustment can be done very accurately. In a particularly preferred detailed design, the positive guide comprises a preferably multi-start thread, a link or a sliding block. As a result, for example, a large thread pitch can be combined with a mechanically secure guidance.
Allgemein vorteilhaft hat der Schieber eine bevorzugt zylindrische Innenwand, die als Teil der Brennkammer ausgebildet ist. Bei einer solchen Anordnung dient der Schieber zweckmäßig auch einer Führung des Kolbenglieds in einem ersten Abschnitt der Kolbenbewegung.Generally advantageous, the slide has a preferably cylindrical inner wall, which is formed as part of the combustion chamber. In such an arrangement, the slide is also useful a guide of the piston member in a first portion of the piston movement.
Zur Erzielung einer einfachen und intuitiven Verstellung der Eintreibenergie hat das Stellglied ein um die Zentralachse verschwenkbares Bedienteil. Bei dem Bedienteil kann es sich um jedes geeignete Mittel zum manuellen Verstellen handeln, wie etwa eine verdrehbare Hülse als besonders bevorzugte Variante, ein verschwenkbarer Knopf oder Ähnliches.To achieve a simple and intuitive adjustment of the driving energy, the actuator has a pivotable about the central axis control panel. The control panel may be any suitable means for manual adjustment, such as a rotatable sleeve as a particularly preferred variant, a pivotable knob or the like.
Durch die Verschwenkbarkeit des Bedienteils um die Zentralachse ist eine einfache Verstellung bei zugleich effektiver Sichtkontrolle des eingestellten Wertes erzielbar. Eine solche Anordnung ermöglicht zudem eine einfache Verstellung selbst unter ungünstigen Bedingungen wie zum Beispiel dem Tragen von Arbeitshandschuhen.Due to the pivotability of the control panel about the central axis is a simple adjustment at the same time effective visual control of the set value achievable. Such an arrangement also allows easy adjustment even under unfavorable conditions such as wearing work gloves.
Allgemein vorteilhaft ist das Bedienteil als eine ringförmige Hülse ausgebildet, wobei die Hülse die Zentralachse umfängt. Zur Einstellung der Eintreibenergie kann dann die Hülse in mehrere verschiedene Positionen verdreht werden, wobei zumindest zwei verschiedene Positionen zwei verschiedenen Eintriebenergien zugeordnet sind. Zur vorteilhaften Bedienung kann die Hülse mittels eines Rastglieds in zumindest einer definierten Stellung gehalten sein. Solche definierten Stellungen können eine Wartungsstellung oder auch eine definierte Stellung zur Veränderung der Eintreibenergie sein.Generally advantageously, the operating part is designed as an annular sleeve, wherein the sleeve surrounds the central axis. To adjust the driving energy then the sleeve can be rotated in several different positions, wherein at least two different positions are assigned to two different drive energies. For advantageous operation, the sleeve by means of a locking member in at least one defined position be held. Such defined positions may be a maintenance position or a defined position for changing the driving energy.
Ein erfindungsgemäßes Bedienteil und insbesondere eine vorstehend beschriebene Hülse können zur Optimierung der Ergonomie des Gerätes in einem vorderen Bereich vor einem Handgriff des Gerätes angeordnet sein. Hierbei kann sich in Anordnung und Gestaltung des Bedienteils eine vorteilhafte Analogie zu bekannten Bedienteilen von handgeführten Bohrmaschinen und/oder Akkuschraubern ergeben. Die Bedienteile solcher Geräte dienen dabei entsprechend anderen Zwecken, zum Beispiel einer Drehmomentverstellung oder einer Umstellung von Schraubbetrieb auf Hammerbetrieb bei einer Schlagbohrmaschine.An inventive control panel and in particular a sleeve described above can be arranged to optimize the ergonomics of the device in a front area in front of a handle of the device. This can result in arrangement and design of the control panel an advantageous analogy to known controls of hand-held drills and / or cordless screwdrivers. The controls of such devices are used according to other purposes, such as a torque adjustment or a change from screwing to hammer operation in a percussion drill.
Eine Verschwenkung des Bedienteils um die Zentralachse bedeutet dabei eine im Wesentlichen senkrecht zu der Achse orientierte Auslenkung des Bedienteils aus einer vorherigen Position. Eine Bewegungslinie bzw. Trajektorie des Bedienteils hat dabei einen Krümmungsradius, der bevorzugt nicht kleiner ist als ein Abstand des Bedienteils von der Zentralachse. Bevorzugt, aber nicht notwendig handelt es sich bei der Verschwenkung um eine Rotation um die Zentralachse.A pivoting of the operating part about the central axis means a substantially perpendicular to the axis oriented deflection of the control panel from a previous position. A movement line or trajectory of the operating part has a radius of curvature, which is preferably not smaller than a distance of the operating part from the central axis. Preferably, but not necessarily, the pivoting is a rotation about the central axis.
Dabei sind bevorzugt das Bedienteil und der Schieber drehfest verbunden, so dass eine Verdrehung des Bedienteils zugleich eine Verdrehung und Verstellung des Schiebers zur Regulierung der Eintreibenergie bewirkt.In this case, preferably, the control panel and the slider are rotatably connected, so that a rotation of the control panel at the same time causes a rotation and adjustment of the slider for regulating the driving energy.
Allgemein vorteilhaft ist es vorgesehen, dass der Schieber einen die Zentralachse umlaufenden Kragen aufweist, der überlappend in eine Ausnehmung eines Brennkammergehäuses eingreift, wobei zumindest ein Teil des Abblaskanals als axial erstreckte Aussparung zwischen dem Kragen und dem Brennkammergehäuse ausgebildet ist. Hierdurch kann aufgrund der Überlappung eine hohe Dichtigkeit auch gegenüber großen Gasdrücken erzielt werden. Zudem kann eine Verbindung zwischen dem Abblaskanal und der Brennkammer bereits unmittelbar an einem ladungsseitigen Ende der Brennkammer einstellbar freigegeben werden, was eine Verstellbarkeit über einen großen Bereich der Eintreibenergie ermöglicht.In a generally advantageous manner, the slider has a collar which runs around the central axis and overlaps into a recess of a combustion chamber housing, at least part of the blow-off channel being formed as an axially extending recess between the collar and the combustion chamber housing. As a result, due to the overlap a high tightness can be achieved even with respect to large gas pressures. In addition, a connection between the blow-off duct and the combustion chamber can already be released in an adjustable manner directly at a charge-side end of the combustion chamber, which enables adjustability over a large range of the driving-in energy.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus dem Ausführungsbeispiel sowie aus den abhängigen Ansprüchen. Nachfolgend wird ein bevorzugtesFurther features and advantages of the invention will become apparent from the embodiment and from the dependent claims. Below is a preferred
Ausführungsbeispiel der Erfindung beschrieben und anhand der anliegenden Zeichnungen näher erläutert.
- Fig. 1
- zeigt eine räumliche Gesamtansicht eines erfindungsgemäßen Eintreibgerätes.
- Fig. 2
- zeigt eine räumliche Detailansicht des Eintreibgerätes aus
Fig. 1 . - Fig. 3
- zeigt eine räumliche Schnittansicht des Eintreibgerätes aus
Fig. 1 entlang einer Zentralachse in einem hinteren Bereich einer Kolbenführung. - Fig. 4
- zeigt eine räumliche Schnittansicht des Eintreibgerätes aus
Fig. 1 entlang einer Zentralachse in einem vorderen Bereich einer Kolbenführung. - Fig. 5
- zeigt eine Detailansicht des Bereichs der Kolbenführung aus
Fig. 3 in einer Einstellung mit reduzierter Eintreibenergie. - Fig. 6
- zeigt die Detailansicht aus
Fig. 5 in einer Einstellung mit maximaler Eintreibenergie. - Fig. 7
- zeigt eine räumliche Schnittansicht des Eintreibgerätes aus
Fig. 1 quer zu einer Zentralachse in einem hinteren Bereich einer Kolbenführung. - Fig. 8
- zeigt eine Schnittansicht wie in
Fig. 7 mit einer etwas nach hinten versetzten Schnittebene und mit entferntem Kolbenglied. - Fig. 9
- zeigt eine räumliche Darstellung eines Schiebers des Eintreibgerätes aus
Fig. 1 . - Fig. 10
- zeigt den Schieber aus
Fig. 9 in Zusammenwirkung mit einer Kolbenführung.
- Fig. 1
- shows a general view of a Eintreibgerätes invention.
- Fig. 2
- shows a spatial detail of the tacker
Fig. 1 , - Fig. 3
- shows a spatial sectional view of the tacker
Fig. 1 along a central axis in a rear region of a piston guide. - Fig. 4
- shows a spatial sectional view of the tacker
Fig. 1 along a central axis in a front region of a piston guide. - Fig. 5
- shows a detailed view of the area of the piston guide
Fig. 3 in a setting with reduced driving energy. - Fig. 6
- shows the detail view
Fig. 5 in a setting with maximum driving energy. - Fig. 7
- shows a spatial sectional view of the tacker
Fig. 1 transverse to a central axis in a rear region of a piston guide. - Fig. 8
- shows a sectional view as in
Fig. 7 with a slightly offset rearward cutting plane and with removed piston member. - Fig. 9
- shows a spatial representation of a slider of the tacker
Fig. 1 , - Fig. 10
- shows the slider
Fig. 9 in cooperation with a piston guide.
Eine erfindungsgemäße Eintreibvorrichtung umfasst ein handgeführtes Gehäuse 1, in dem ein Kolbenglied in Form eines Kolbens 2 aufgenommen ist. Eine Oberfläche 2a des Kolbens 2 begrenzt eine Brennkammer 3, in der sich die Verbrennungsgase einer pyrotechnischen Ladung ausdehnen, um den Kolben 2 zu beschleunigen.A drive-in device according to the invention comprises a hand-guided
Der so mit Bewegungsenergie beaufschlagte Kolben 2 trifft mit einem endseitigen Stößel auf ein Befestigungselement (nicht dargestellt), das hierdurch in ein Werkstück eingetrieben wird. Das Befestigungselement kann insbesondere in einem Modul oder Magazin (nicht dargestellt) aufgenommen sein, dass in einem vorderen Haltebereich 1a des Eintreibgerätes 1 austauschbar angesetzt wird.The so acted upon by
Die Ladung ist vorliegend in einer Kartusche 4a aus Metallblech aufgenommen. Die Kartusche 4a hat einen Aufschlagzünder und wird vor der Zündung über eine entsprechende Lademechanik, vorliegend mittels eines Magazinstreifens, in ein Kartuschenlager 4 eingesetzt. Die Kartusche und das Kartuschenlager 4 sind rotationssymmetrisch um eine Zentralachse A ausgebildet. Die Zentralachse A ist in den vorliegenden Beispielen zugleich eine Mittelachse der Brennkammer 3 und des Kolbenglieds 2.The charge is presently received in a
Die Brennkammer 3 ist zwischen einer kreisförmigen Öffnung des Kartuschenlagers 4 und der Oberfläche 2a des Kolbens 2 angeordnet. Vorliegend ist in dem Kolben 2 eine Vertiefung 2b ausgebildet, die zu einer besseren Verwirbelung der Brenngase beiträgt und einen Teil der Begrenzung der Brennkammer 3 darstellt.The
Die Brennkammer 3 ist in einem ersten Abschnitt als ein hohlzylindrischer, im Wesentlichen hülsenförmiger Körper 6 ausgebildet. Dieser Körper 6 ist zugleich als ein um die Zentralachse A verdrehbarer und dabei in seiner Position in Richtung der Zentralachse A veränderbarer Schieber zur einstellbaren Freigabe eines oder mehrerer Abblaskanäle 7 mit beispielsweise stufenförmigem Querschnitt ausgebildet.The
Der Abblaskanal 7 umfasst über den Umfang verteilt mehrere Aussparungen 7a in einem Brennkammergehäuse 8. Die Aussparungen 7a erstrecken sich axial in Richtung parallel zu der Zentralachse A und münden in einen zwischen dem Brennkammergehäuse 8 und einer Kolbenführung 5 verlaufenden Abschnitt des Abblaskanals 7 mit größerem Volumen.The
In dem Brennkammergehäuse 8 befindet sich im Bereich der Brennkammer eine zylindrische Ausnehmung mit einem mehrgängigen Innengewinde 8a. Der Schieber 6 ist mit einem korrespondierenden Außengewinde 6a in die Öffnung des Brennkammergehäuses 8 eingeschraubt. Eine Verdrehung des Schiebers 6 um die Zentralachse A bewirkt demnach einen zwangsgesteuerten axialen Versatz des Schiebers 6.In the
Der Schieber 6 ist mit einem nach hinten bzw. in Richtung eines Bodens der Brennkammer 3 erstreckten Kragen 6b versehen, der axial überlappend in die Ausnehmung des Brennkammergehäuses 8 eingreift. Je nach axialer Position des Schiebers 6 wird somit ein veränderbarer Durchtritt 9 von der Brennkammer 3 in die Ausnehmungen bzw. Abblaskanäle 7a freigegeben (siehe
An einer Stirnseite des Schiebers 6 sind axiale Vorsprünge 6c ausgebildet, die gegebenenfalls abgelagerten Schmutz teilweise oder vollständig abschaben.On one end face of the
Eine Führung des Kolbens 2 erfolgt sowohl in dem Schieber 6 als auch in der dem Schieber 6 in Eintreibrichtung nachfolgenden Kolbenführung 5. Die Kolbenführung 5 ist in dem Brennkammergehäuse um die Zentralachse A verdrehbar aufgenommen. Die Kolbenführung 5 ist mittels zweier Klauen 5a mit dem Schieber 6 verkoppelt, wobei die axial vorragenden Klauen 5a in zwei korrespondierende Ausnehmungen 6d in dem Schieber 6 drehfest, aber axial verschiebbar eingreifen (siehe
Ein vorderes Ende der Kolbenführung 5 ist mit einem Bedienteil 10 drehfest verkoppelt. so dass die Kolbenführung 5 zugleich eine mechanische Verbindung zwischen dem Bedienteil 10 und dem Schieber 6 ausbildet. Das Bedienteil 10 ist vorliegend als in dem Brennkammergehäuse drehbare Hülse ausgebildet, die im Wesentlichen konzentrisch um die Zentralachse A in einem vorderen Bereich des Gehäuses 1 des Eintreibgerätes angeordnet ist.A front end of the
Das Bedienteil 10 bildet zusammen mit der Kolbenführung 5 und dem Schieber 6 ein Stellglied zur Veränderung der Eintreibenergie des Eintreibgerätes 1 aus. Diese Verstellung und der Eintreibvorgang funktionieren wie folgt:
Nach einem Eintreibvorgang befindet sich das Kolbenglied in einer teilweise undefinierten, jedoch weitgehend nach vorne verschobenen Position. Das Brennkammergehäuse 8 befindet sich in einer maximal nach hinten in das Eintreibgerät hinein geschobenen Position. Die Begriffe "vorne" und "hinten" werden vorliegend immer in Bezug auf die Eintreibrichtung gewählt.The operating
After a Eintreibvorgang the piston member is in a partially undefined, but largely shifted forward position. The
Sodann wird zur Vorbereitung des nächsten Eintreibvorgangs die gewünschte Eintreibenergie als auf dem Bedienteil markierte Energiestufe durch Verdrehen der Hülse 10 eingestellt. Dies führt über die vorstehend beschriebene Zwangssteuerung zu einer gewählten axialen Positionierung des Schiebers 6 relativ zu dem Brennkammergehäuse 8. Hierdurch wird der Abblaskanal über den Durchtritt 9 definiert freigegeben oder geschlossen (maximale Eintreibenergie).Then, in preparation for the next driving operation, the desired driving energy is set as the energy level marked on the operating part by rotating the
Im vorliegenden Beispiel der Erfindung wird bei reduzierter Eintreibenergie ein entsprechender Teil der Treibgase bzw. Abgase über die beschriebenen Kanäle 7a, 7 nach außen abgeführt. Bei anderen Ausführungsformen kann je nach Anforderungen auch ein geschlossenes Totraumvolumen vorgesehen sein, wobei zum Beispiel die Abblaskanäle 7a nur als optionale Raumerweiterung der Brennkammer dienen und nicht weiter nach außen verbunden sind. Bei wiederum anderen Ausführungsformen kann es vorgesehen sein, dass die über die Abblaskanäle geführten Gase zu einer Kolbenrückstellung mittels Gasdruck verwendet werden.In the present example of the invention, with reduced drive-in energy, a corresponding part of the propellant gases or exhaust gases is discharged to the outside via the described
Im vorliegenden Ausführungsbeispiel ist eine Demontage von Kolbenglied 2 und Brennkammergehäuse 8 mittels eines zusätzlichen Verschlussringes 11 ermöglicht, der hinter dem Bedienteil 10 angeordnet. Der Verschlussring trägt eine Taste 10a, die einer Sicherung des Bedienteils 10 dient und zur Verstellung des Bedienteils gedrückt werden muss. Der Verschlussring 11 ist auf analoge Weise über eine Taste 11a an dem Gehäuse des Eintreibgerätes 1 gesichert.In the present embodiment, a disassembly of the
Bei einer alternativen Ausführungsform der Erfindung kann die oben erwähnte Funktion zur Demontage des Eintreibgerätes auch in das das Bedienteil 10 integriert sein.In an alternative embodiment of the invention, the above-mentioned function for disassembling the tacker can also be integrated into the operating
Claims (8)
- Driving device, comprising
a hand-held housing (1) with a piston element (2) for transferring energy to a fastening element to be driven arranged in it,
a particularly changeable propellant (4a) and
a combustion chamber (3) arranged between the propellant (4a) and the piston element (2), which extends around a central axis (A),
and a control element (5, 6, 10), by means of which the energy transferring from the propellant (4a) to the piston element (2) may be changed in an adjustable way, in which a blowoff channel (7, 7a, 9) connected to the combustion chamber (3) may be released by means of a moveable slider (6) of the control element,
in which the slider (6) comprises a body running completely around the central axis (A), characterised in that
a piston guide (5) arranged in front of the combustion chamber (3) is accommodated so that it may turn around the central axis (A) in relation to the housing (1), in which the piston guide (5) and the slider (6) are connected to each other in a rotationally fixed way and are able to move axially to each other. - Driving device according to claim 1, characterised in that the slider (6) may turn around the central axis (A) in order to adjust a cross section (9) of the blowoff channel (7, 7a, 9).
- Driving device according to claim 2, characterised in that the slider (6) is supported in a forced control (6a, 8a), in which turning the slider (6) around the central axis (A) causes a movement of the slider (6) in the direction of the central axis (A).
- Driving device according to claim 3, characterised in that the forced control comprises a particularly multiple thread (6a, 8a).
- Driving device according to one of the previous claims, characterised in that the slider (6) has a particularly cylindrical inner wall, which is made as part of the combustion chamber (3).
- Driving device according to one of the previous claims, characterised in that the control element (5, 6, 10) has an operating part (10) that may be swivelled around the central axis (A).
- Driving device according to claim 6, characterised in that the operating part (10) and the slider (6) are connected in a rotationally fixed way.
- Driving device according to one of the previous claims, characterised in that the slider (6) has a collar (6b) running around the central axis (A), which engages overlapping in a recess of a combustion chamber housing (8), in which at least a part of the blowoff channel (7a) is made as an axially extended recess between the collar (6b) and the combustion chamber housing (8).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14162168.0A EP2923797A1 (en) | 2014-03-28 | 2014-03-28 | Pyrotechnic fastening device |
PCT/EP2015/056226 WO2015144687A1 (en) | 2014-03-28 | 2015-03-24 | Pyrotechnic driving device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3122515A1 EP3122515A1 (en) | 2017-02-01 |
EP3122515B1 true EP3122515B1 (en) | 2018-05-02 |
Family
ID=50389300
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14162168.0A Withdrawn EP2923797A1 (en) | 2014-03-28 | 2014-03-28 | Pyrotechnic fastening device |
EP15711764.9A Active EP3122515B1 (en) | 2014-03-28 | 2015-03-24 | Pyrotechnic fastening device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14162168.0A Withdrawn EP2923797A1 (en) | 2014-03-28 | 2014-03-28 | Pyrotechnic fastening device |
Country Status (8)
Country | Link |
---|---|
US (1) | US10500703B2 (en) |
EP (2) | EP2923797A1 (en) |
JP (1) | JP6298900B2 (en) |
CN (1) | CN106103001B (en) |
AU (1) | AU2015238461A1 (en) |
ES (1) | ES2669497T3 (en) |
TR (1) | TR201810062T4 (en) |
WO (1) | WO2015144687A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2886260A1 (en) * | 2013-12-19 | 2015-06-24 | HILTI Aktiengesellschaft | Driving device |
EP2923800A1 (en) * | 2014-03-28 | 2015-09-30 | HILTI Aktiengesellschaft | Pyrotechnic insertion device |
EP2923797A1 (en) * | 2014-03-28 | 2015-09-30 | HILTI Aktiengesellschaft | Pyrotechnic fastening device |
EP4067002A1 (en) * | 2021-03-29 | 2022-10-05 | Hilti Aktiengesellschaft | Pyrotechnic fastener driving tool |
EP4067001A1 (en) * | 2021-03-29 | 2022-10-05 | Hilti Aktiengesellschaft | Pyrotechnic fastener driving tool |
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- 2015-03-24 JP JP2016555808A patent/JP6298900B2/en active Active
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- 2015-03-24 WO PCT/EP2015/056226 patent/WO2015144687A1/en active Application Filing
- 2015-03-24 TR TR2018/10062T patent/TR201810062T4/en unknown
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Also Published As
Publication number | Publication date |
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TR201810062T4 (en) | 2018-08-27 |
ES2669497T3 (en) | 2018-05-28 |
JP6298900B2 (en) | 2018-03-20 |
CN106103001B (en) | 2018-07-17 |
CN106103001A (en) | 2016-11-09 |
EP3122515A1 (en) | 2017-02-01 |
WO2015144687A1 (en) | 2015-10-01 |
JP2017509496A (en) | 2017-04-06 |
US20170100830A1 (en) | 2017-04-13 |
EP2923797A1 (en) | 2015-09-30 |
US10500703B2 (en) | 2019-12-10 |
AU2015238461A1 (en) | 2016-08-18 |
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