EP1469205B1 - Force element - Google Patents

Force element Download PDF

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Publication number
EP1469205B1
EP1469205B1 EP04008316A EP04008316A EP1469205B1 EP 1469205 B1 EP1469205 B1 EP 1469205B1 EP 04008316 A EP04008316 A EP 04008316A EP 04008316 A EP04008316 A EP 04008316A EP 1469205 B1 EP1469205 B1 EP 1469205B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder sleeve
plunger
force element
accordance
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.)
Expired - Lifetime
Application number
EP04008316A
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German (de)
French (fr)
Other versions
EP1469205A2 (en
EP1469205A3 (en
Inventor
Uwe Brede
Anton Bretfeld
Josef Storath
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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
Priority claimed from DE102004009444A external-priority patent/DE102004009444A1/en
Application filed by Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1469205A2 publication Critical patent/EP1469205A2/en
Publication of EP1469205A3 publication Critical patent/EP1469205A3/en
Application granted granted Critical
Publication of EP1469205B1 publication Critical patent/EP1469205B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/19—Pyrotechnical actuators

Definitions

  • the invention relates to a force element according to the preamble of claim 1 ( EP-A-0731004 ).
  • Power elements are used to initiate, trigger or directly actuate mechanical control operations.
  • a piston on which a plunger is arranged moves, which then extends out of the housing the plunger and thus can initiate a mechanical movement process by exerting force.
  • power elements of this design are complicated and expensive. Especially in the automotive security sector requires solutions with high technical performance at low price.
  • the invention is based on the object to improve a force element according to the preamble of claim 1 so that it is more stable.
  • the piston has a larger diameter than the plunger and both are interconnected via an annular shoulder.
  • the cylinder sleeve is adapted to this and has a larger diameter in the region of the piston than in the region of the plunger.
  • the transition of the cylinder sleeve from the larger to the smaller diameter in the extended state of the plunger serves as a stop for the annular shoulder of the piston.
  • the cylinder sleeve is made of a metal.
  • a preferably semicircular bulge is introduced in the piston on the end facing the drive element.
  • the wall of the cylinder sleeve is advantageously bent outwards, so that the cylinder sleeve is better anchored in the surrounding housing.
  • a sealing ring is embedded on the outer circumference of the piston.
  • the plunger is anchored after the ignition of the drive element in its driven position, the plunger is preferably formed at its end facing away from the piston conical, so that it passes when expelled in a press fit with the cylinder sleeve.
  • the housing is made of plastic.
  • a method for producing a force element according to the invention is characterized in that the cylinder sleeve, the drive element and the piston are manufactured individually with the plunger and then mounted closed as a kit and is finally surrounded by the plastic housing.
  • mechanical control problems can be solved as a modular system that can be adapted to a wide variety of tasks.
  • the three functional elements of the force element according to the invention as pyrotechnic drive element 1 (see Figure 1), plunger 2 with integrated piston 2a and sealing ring 4 and the cylinder sleeve 3 are manufactured individually and then mounted as a kit closed and after a variety of customer installation conditions with a plastic housing 5 (see Also Fig. 2) surrounded.
  • This modular system has the advantage that the actual functional unit consisting of drive element 1, plunger 2 with piston 2a and cylinder sleeve 3 can be adapted without restriction with an outer shape of the housing for a variety of installation conditions.
  • FIG. 2 shows various embodiments of the outer adaptation geometry with a very wide variety of housings 5.
  • an electrical tripping current pulse is applied to the connector pins 6 of the drive element 1 via a sensor system.
  • the pyrotechnic drive charge is ignited in the drive element 1, whereby a drive pressure in the region of the piston 2 a arises, which expels the plunger 2 via the piston 2 a.
  • the formed by the transition of the piston 2a to the plunger 2 annular shoulder 7 can strike in its final position to the cylinder sleeve 3 and thus be slowed down.
  • the plunger 2 may also be slightly conical, so that it passes during expulsion by the conicity in a press fit with the cylinder sleeve 3.
  • a plug receptacle is designated with Verrastungsform, via which the plug to the pins 6 of the drive element 1 can be fastened.
  • the cylinder sleeve 3 is formed open at its end faces, wherein on one end side, the drive element 1 is inserted and on the other end of the Plunger 2 is arranged or protruding.
  • the plunger 2 has on the side facing the drive element 1 a piston 2a, which has a larger diameter than the plunger 2 and is connected thereto via an annular shoulder 7.
  • the cylinder sleeve 3 which has a larger diameter in the region of the piston 2a and the drive element 1 than at the end of the cylinder sleeve 3 opposite the drive element 1.
  • the transition 10 of the cylinder sleeve 3 from the larger to the smaller diameter is used in the extended state of the plunger 2 as a stop 11 for the piston 2a.
  • a semicircular bulge 9 is introduced in the piston 2a.
  • Figure 2 shows various housing 5 of the force element, namely as a quarter-circle in the section, triangular with z.
  • B. a dovetail groove 12 for attachment, round or rectangular.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

The actuator for motor vehicle safety systems has a housing (5) in which a pyrotechnic (1) for driving a piston (2a) is positioned. The piston has a pin (2a) and is driven by the gas produced by the pyrotechnic for extending the pin outwardly of the housing. The housing has an open cylinder (3) on one end face. The first end face of the cylinder has the pyrotechnic and the opposite end face has the pin.

Description

Die Erfindung betrifft ein Kraftelement nach dem Oberbegriff des Anspruchs 1 ( EP-A-0731004 ).The invention relates to a force element according to the preamble of claim 1 ( EP-A-0731004 ).

Kraftelemente werden eingesetzt, um mechanische Steuerungsvorgänge in Gang zu setzen, auszulösen oder direkt zu betätigen. Wie auch in der DE 2 747 977 A1 beschrieben, wird nach Zündung einer pyrotechnischen Ladung eines Anzündelements in einem Gehäuse ein Kolben, auf dem ein Stößel angeordnet ist, bewegt, der dann aus dem Gehäuse den Stößel ausfährt und damit einen mechanischen Bewegungsvorgang durch Ausübung von Kraft einleiten kann. Kraftelemente dieser Bauform sind jedoch aufwendig und kostspielig. Speziell der Einsatz im Automobilsicherheitsbereich erfordert Lösungen mit hoher technischer Performance bei niedrigem Preis.Power elements are used to initiate, trigger or directly actuate mechanical control operations. As in the DE 2 747 977 A1 described, after ignition of a pyrotechnic charge of an ignition element in a housing, a piston on which a plunger is arranged, moves, which then extends out of the housing the plunger and thus can initiate a mechanical movement process by exerting force. However, power elements of this design are complicated and expensive. Especially in the automotive security sector requires solutions with high technical performance at low price.

Der Erfindung liegt die Aufgabe zu Grunde, ein Kraftelement nach dem Oberbegriff des Anspruchs 1 so zu verbessern, dass dieses stabiler ist.The invention is based on the object to improve a force element according to the preamble of claim 1 so that it is more stable.

Diese Aufgabe wird erfindungsgemäß dadurch die Merkmale des Anspruch 1 gelöst.This object is achieved by the features of claim 1.

Der Kolben weist einen größeren Durchmesser als der Stößel auf und beide sind über einen ringförmigen Absatz miteinander verbunden. Die Zylinderhülse ist hieran angepasst und weist im Bereich des Kolbens einen größeren Durchmesser als im Bereich des Stößels auf.The piston has a larger diameter than the plunger and both are interconnected via an annular shoulder. The cylinder sleeve is adapted to this and has a larger diameter in the region of the piston than in the region of the plunger.

In vorteilhafter Ausführungsform dient der Übergang der Zylinderhülse vom größeren auf den kleineren Durchmesser im ausgefahrenen Zustand des Stößels als Anschlag für den ringförmigen Absatz des Kolbens.In an advantageous embodiment, the transition of the cylinder sleeve from the larger to the smaller diameter in the extended state of the plunger serves as a stop for the annular shoulder of the piston.

Dieser Absatz bzw. Übergang der Zylinderhülse vom größeren auf den kleineren Durchmesser ist durch Stauchen und/oder Falten der Zylinderhülse bzw. deren Wand hergestellt.This paragraph or transition of the cylinder sleeve from the larger to the smaller diameter is made by upsetting and / or folding the cylinder sleeve or its wall.

Bevorzugt ist die Zylinderhülse aus einem Metall hergestellt.Preferably, the cylinder sleeve is made of a metal.

Zum besseren Druckaufbau der Antriebsgase ist im Kolben am zum Antriebselement gewandten Ende eine vorzugsweise halbkreisförmige Ausbuchtung eingebracht.For better pressure build-up of the drive gases, a preferably semicircular bulge is introduced in the piston on the end facing the drive element.

An den Stirnseiten der Zylinderhülse ist die Wand der Zylinderhülse vorteilhafterweise nach außen umgebogen, so dass die Zylinderhülse besser im umgebenden Gehäuse verankert ist.At the end faces of the cylinder sleeve, the wall of the cylinder sleeve is advantageously bent outwards, so that the cylinder sleeve is better anchored in the surrounding housing.

In bevorzugter Ausführungsform ist auf dem Außenumfang des Kolbens ein Dichtungsring eingelassen.In a preferred embodiment, a sealing ring is embedded on the outer circumference of the piston.

Damit der Stößel nach der Zündung des Antriebselements in seiner ausgetriebenen Stellung verankert ist, ist bevorzugt der Stößel an seinem dem Kolben abgewandten Ende konisch ausgebildet, so dass er beim Austreiben in einen Presssitz mit der Zylinderhülse übergeht.So that the plunger is anchored after the ignition of the drive element in its driven position, the plunger is preferably formed at its end facing away from the piston conical, so that it passes when expelled in a press fit with the cylinder sleeve.

In bevorzugter Ausführungsform besteht das Gehäuse aus Kunststoff.In a preferred embodiment, the housing is made of plastic.

Ein Verfahren zur Herstellung eines erfindungsgemäßen Kraftelements zeichnet sich dadurch aus, dass die Zylinderhülse, das Antriebselement und der Kolben mit dem Stößel einzeln gefertigt und anschließend als Bausatz geschlossen montiert werden und zuletzt vom Gehäuse aus Kunststoff umgeben wird.A method for producing a force element according to the invention is characterized in that the cylinder sleeve, the drive element and the piston are manufactured individually with the plunger and then mounted closed as a kit and is finally surrounded by the plastic housing.

Nachfolgend wird die Erfindung an Hand von Figuren genauer erläutert.The invention will be explained in more detail with reference to figures.

In vorteilhafter Weise lassen sich mechanische Steuerungsprobleme als modulares, den verschiedensten Aufgabenstellungen anpaßbares System lösen. Dazu werden die drei Funktionselemente des erfindungsgemäßen Kraftelements wie pyrotechnisches Antriebselement 1 (siehe Figur 1), Stößel 2 mit integriertem Kolben 2a und Dichtring 4 sowie die Zylinderhülse 3 einzeln gefertigt und dann als Bausatz geschlossen montiert und nach unterschiedlichsten kundenspezifischen Einbauverhältnissen mit einem Kunststoffgehäuse 5 (siehe auch Fig. 2) umgeben.Advantageously, mechanical control problems can be solved as a modular system that can be adapted to a wide variety of tasks. For this purpose, the three functional elements of the force element according to the invention as pyrotechnic drive element 1 (see Figure 1), plunger 2 with integrated piston 2a and sealing ring 4 and the cylinder sleeve 3 are manufactured individually and then mounted as a kit closed and after a variety of customer installation conditions with a plastic housing 5 (see Also Fig. 2) surrounded.

Dieses erfindungsgemäße modulare System hat den Vorteil, dass die eigentliche Funktionseinheit bestehend aus Antriebselement 1, Stößel 2 mit Kolben 2a und Zylinderhülse 3 uneingeschränkt mit einer äußeren Formgebung des Gehäuses für die verschiedensten Einbaubedingungen angepaßt werden kann. Figur 2 zeigt verschiedene Ausführungsformen der äußeren Adaptionsgeometrie mit den unterschiedlichsten Gehäusen 5.This modular system according to the invention has the advantage that the actual functional unit consisting of drive element 1, plunger 2 with piston 2a and cylinder sleeve 3 can be adapted without restriction with an outer shape of the housing for a variety of installation conditions. FIG. 2 shows various embodiments of the outer adaptation geometry with a very wide variety of housings 5.

Funktion:Function:

Tritt zum Beispiel an einer elektrischen Einrichtung eine technische Überlastsituation oder im Fahrzeug eine Crashsituation auf, so wird über eine Sensorik ein elektrischer Auslöse- Stromimpuls auf die Anschlußsteckerpins 6 des Antriebselements 1 gegeben. Mit diesem Stromstoß wird die pyrotechnische Antriebsladung im Antriebselement 1 gezündet, wodurch ein Antriebsdruck im Bereich des Kolbens 2a entsteht, der den Stößel 2 über den Kolben 2a austreibt. Der durch den Übergang des Kolbens 2a zum Stößel 2 gebildete ringförmige Absatz 7 kann in seiner Endlage an die Zylinderhülse 3 anschlagen und damit abgebremst werden. Der Stößel 2 kann jedoch auch leicht konisch ausgebildet sein, so dass er beim Austreiben durch die Konizität in einen Preßsitz mit der Zylinderhülse 3 übergeht. Damit wäre der Stößel 2 sehr fest in der Endlage fixiert. Ebenfalls kann diese Konizität ein gesteuertes Abbremsen ermöglichen. Mit dem Bezugszeichen 8 ist eine Steckeraufnahme mit Verrastungsform bezeichnet, über die der Stecker an die Pins 6 des Antriebselements 1 befestigbar ist.For example, if a technical overload situation occurs in an electrical device or a crash situation occurs in the vehicle, an electrical tripping current pulse is applied to the connector pins 6 of the drive element 1 via a sensor system. With this surge, the pyrotechnic drive charge is ignited in the drive element 1, whereby a drive pressure in the region of the piston 2 a arises, which expels the plunger 2 via the piston 2 a. The formed by the transition of the piston 2a to the plunger 2 annular shoulder 7 can strike in its final position to the cylinder sleeve 3 and thus be slowed down. However, the plunger 2 may also be slightly conical, so that it passes during expulsion by the conicity in a press fit with the cylinder sleeve 3. Thus, the plunger 2 would be very firmly fixed in the end position. Also, this conicity can allow a controlled braking. By the reference numeral 8, a plug receptacle is designated with Verrastungsform, via which the plug to the pins 6 of the drive element 1 can be fastened.

Die Zylinderhülse 3 ist an ihren Stirnseiten offen ausgebildet, wobei auf einer Stirnseite das Antriebselement 1 eingeschoben ist und auf der anderen Stirnseite der Stößel 2 angeordnet ist oder herausragt. Der Stößel 2 weist an der zum Antriebselement 1 zeigenden Seite einen Kolben 2a auf, der einen größeren Durchmesser als der Stößel 2 aufweist und mit diesem über einen ringförmigen Absatz 7 verbunden ist. Hieran angepasst ist die Zylinderhülse 3, die im Bereich des Kolbens 2a und des Antriebselements 1 einen größeren Durchmesser als an dem dem Antriebselement 1 entgegengesetzten Ende der Zylinderhülse 3 aufweist. Der Übergang 10 der Zylinderhülse 3 vom größeren auf den kleineren Durchmesser dient im ausgefahrenen Zustand des Stößels 2 als Anschlag 11 für den Kolben 2a. An dem zum Antriebselement 1 gewandten Ende des Kolbens 2a ist im Kolben 2a eine halbkreisförmige Ausbuchtung 9 eingebracht.The cylinder sleeve 3 is formed open at its end faces, wherein on one end side, the drive element 1 is inserted and on the other end of the Plunger 2 is arranged or protruding. The plunger 2 has on the side facing the drive element 1 a piston 2a, which has a larger diameter than the plunger 2 and is connected thereto via an annular shoulder 7. Adapted to this is the cylinder sleeve 3, which has a larger diameter in the region of the piston 2a and the drive element 1 than at the end of the cylinder sleeve 3 opposite the drive element 1. The transition 10 of the cylinder sleeve 3 from the larger to the smaller diameter is used in the extended state of the plunger 2 as a stop 11 for the piston 2a. At the end of the piston 2a facing the drive element 1, a semicircular bulge 9 is introduced in the piston 2a.

Figur 2 zeigt verschiedene Gehäuse 5 des Kraftelements, nämlich als im Schnitt viertelkreisförmig, dreieckig mit z. B. einer Schwalbenschwanznut 12 zur Befestigung, rund oder rechteckig.Figure 2 shows various housing 5 of the force element, namely as a quarter-circle in the section, triangular with z. B. a dovetail groove 12 for attachment, round or rectangular.

Claims (9)

  1. A force element having a cylinder sleeve (3) which is open at its end faces and in which a gas-generating driving member (1) and a piston (2a) are arranged with a plunger (2) arranged on the piston (2a), wherein the piston (2a) can be accelerated by the generated driving gases of the driving member (1) out of the cylinder sleeve (3) in the outlet direction of the plunger (2), wherein the driving member (1) is pushed in at a first end face of the cylinder sleeve (3) and the plunger (2) is arranged at a second end face, characterised in that the force element is located in a housing (5), and in that the wall of the cylinder sleeve (3) is bent over outwardly at right angles at the end faces of the wall.
  2. A force element in accordance with claim 1, characterised in that the piston (2a) has a larger diameter than the plunger (2) and both are connected to one another via a ring-shaped step (7), with the cylinder sleeve (3) having a larger diameter in the region of the piston (2a) than in the region of the plunger (2).
  3. A force element in accordance with claim 2, characterised in that the transition (10) of the cylinder sleeve (3) from the larger diameter to the smaller diameter in the extended state of the plunger (2) serves as an abutment (11) for the ring-shaped step (7) of the piston (2a).
  4. A force element in accordance with claim 2 or claim 3, characterised in that the transition (10) of the cylinder sleeve (3) from the larger diameter to the smaller diameter is established by compressing and/or folding the cylinder sleeve (3).
  5. A force element in accordance with any one of the claims 1 to 4, characterised in that the cylinder sleeve (3) consists of a metal.
  6. A force element in accordance with any one of the claims 1 to 5, characterised in that a preferably semi-circular indentation (9) is introduced in the piston (2a) at the end facing the driving member (1).
  7. A force element in accordance with any one of the claims 1 to 6, characterised in that a sealing ring (4) is let in at the outer periphery of the piston (2a).
  8. A force element in accordance with any one of the claims 1 to 7, characterised in that the plunger (2) is made conical at its end remote from the piston (2a).
  9. A force element in accordance with any one of the claims 1 to 8, characterised in that the housing (5) consists of plastic.
EP04008316A 2003-04-19 2004-04-06 Force element Expired - Lifetime EP1469205B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10317987 2003-04-19
DE10317987 2003-04-19
DE102004009444A DE102004009444A1 (en) 2003-04-19 2004-02-27 force member
DE102004009444 2004-02-27

Publications (3)

Publication Number Publication Date
EP1469205A2 EP1469205A2 (en) 2004-10-20
EP1469205A3 EP1469205A3 (en) 2005-05-11
EP1469205B1 true EP1469205B1 (en) 2007-08-15

Family

ID=32909561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008316A Expired - Lifetime EP1469205B1 (en) 2003-04-19 2004-04-06 Force element

Country Status (3)

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EP (1) EP1469205B1 (en)
AT (1) ATE370336T1 (en)
DE (1) DE502004004612D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008046897A1 (en) 2007-09-14 2009-03-26 Ruag Ammotec Gmbh force member
FR2966431B1 (en) * 2010-10-22 2012-12-21 Dassault Aviat PNEUMATIC EJECTION ACTUATOR FOR AN AIRCRAFT-FITTED ELEMENT AND METHOD FOR EJECTING THEREOF
AT511500B1 (en) * 2011-05-23 2013-02-15 Hirtenberger Automotive Safety Gmbh & Co Kg Pyrotechnic actuator
AT12531U1 (en) * 2011-05-23 2012-07-15 Hirtenberger Automotive Safety Gmbh & Co Kg PYROTECHNICAL ACTUATOR

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2747977C2 (en) 1977-10-26 1986-06-19 Dynamit Nobel Ag, 5210 Troisdorf Electrically triggered force element with ejecting piston
FR2731398B1 (en) * 1995-03-10 1997-05-30 Ecia Equip Composants Ind Auto PILOT TRIGGERING ACTUATOR FOR AN ORGAN, FOR EXAMPLE OF A MOTOR VEHICLE
JP2002173391A (en) * 2000-08-04 2002-06-21 Automotive Systems Lab Inc Actuator for ignition
DE10203710C1 (en) * 2002-01-31 2003-02-13 Thomas Magnete Gmbh Pyrotechnical actuator for automobile passenger safety device has detonator used for displacement of sliding piston within cylindrical housing divided longitudinally into 2 parts

Also Published As

Publication number Publication date
EP1469205A2 (en) 2004-10-20
EP1469205A3 (en) 2005-05-11
DE502004004612D1 (en) 2007-09-27
ATE370336T1 (en) 2007-09-15

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