WO2012013180A2 - Actionneur doté d'un alliage à mémoire de forme - Google Patents

Actionneur doté d'un alliage à mémoire de forme Download PDF

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Publication number
WO2012013180A2
WO2012013180A2 PCT/DE2011/001488 DE2011001488W WO2012013180A2 WO 2012013180 A2 WO2012013180 A2 WO 2012013180A2 DE 2011001488 W DE2011001488 W DE 2011001488W WO 2012013180 A2 WO2012013180 A2 WO 2012013180A2
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
wire
memory alloy
end position
spring
Prior art date
Application number
PCT/DE2011/001488
Other languages
German (de)
English (en)
Other versions
WO2012013180A3 (fr
Inventor
Bernhard Kordowski
Volker Westerwick
Andreas Ziganki
Michael Scholz
Original Assignee
Kiekert Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kiekert Aktiengesellschaft filed Critical Kiekert Aktiengesellschaft
Publication of WO2012013180A2 publication Critical patent/WO2012013180A2/fr
Publication of WO2012013180A3 publication Critical patent/WO2012013180A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F03G7/065—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like using a shape memory element

Definitions

  • the invention relates to an actuator, with the heat energy in
  • the actuator includes a
  • Shape memory alloy can be moved to an end position.
  • a shape memory alloy is a material that is found in
  • Shape memory alloy changed so that it changes the shape by leaps and bounds.
  • the sudden change in shape thus caused causes the movement of the control element from the initial position into the
  • Shape memory element restored. From the document DE 3820877 AI is an actuator for
  • Document is known inter alia, a plurality of a
  • an actuator comprising a shape memory alloy, which is a heat actuable switch.
  • a cooling plate is used for cooling.
  • an actuator comprises an actuating element, which from an initial position to an end position by means of a
  • Shape memory alloy includes. Through the movement in the
  • a contact between the shape memory alloy and a heat sink is made, Alternatively or additionally, the current flow is stopped or at least reduced by the movement in the end position by means of a switching element, with the
  • Shape memory alloy is heated. By making contact with a heat sink in the end position, the shape memory alloy can be rapidly cooled after reaching the end position. By cooling, a rapid movement of the actuating element can be brought into its initial position or at least made possible. By interrupted in the end position of the heating current for the shape memory alloy, in particular by short circuit or at least reduced, the
  • Shape memory alloy from overheating and thus the actuator protected from damage.
  • an actuator can be quickly moved from a starting position to an end position and without much time delay then back, so as to actuate, for example, another component mechanically.
  • Such a constructed actuator can be built very compact.
  • the drive device comprises a wire, which consists of the
  • the wire contracts in one embodiment of the invention and thereby pulls the actuator from its initial position towards the end position.
  • the wire attaches to the heat sink, Preferably, the wire contacted then more than 50% of the
  • Heatsink more preferably more than 70%, and based on the total length of the wire, so as to be able to cool particularly well.
  • the cooled wire is stretched back to its initial length and brought into the starting position.
  • the drive device may not necessarily comprise a wire.
  • the drive device may for example also be a rod or comprise a rod.
  • a wire can be more flexibly adapted to existing geometries or incorporated into technically advantageous geometries due to its flexibility compared to a rod.
  • Comparable means contracts by heating or shortened to move an actuator from a starting position to an end position,
  • a biased in the starting position spring may be present, which presses the actuating element in the direction of the end position.
  • the still cool and thus not stretched wire holds the actuator initially in its end position, If the wire is heated, it expands. The actuator then moves by spring force into the end position,
  • Shape memory alloy can be generated a large force. It must then be provided so no major spring force acting permanently on the Sfellelement and this would then permanently burden with high force.
  • the wire terminates with an adjacent surface of the heat sink in the initial position
  • the two wire ends are laterally adjacent to a particular rod-shaped or
  • Adjusting element or the rod in the initial position includes an acute angle greater than 45 °. This angle is special
  • the wire is also connected to the arranged between the two fixed ends actuator and leads for this purpose in a convenient
  • Embodiment through a bore or lateral recess of the actuating element.
  • a particularly large stroke movement of the actuating element can be achieved without the actuator threatening to tilt, since then the wire can be hooked particularly quickly and easily into the recess.
  • each end of the wire is secured to a heat sink made of an electrically conductive material, particularly a metal such as brass.
  • a voltage is applied to the two heat sinks.
  • a current now flows through the wire.
  • the wire is heated and deforms Exceeding the material-dependent activation temperature.
  • the actuating element is moved in the direction of the end position or at least makes such a movement possible.
  • An electrical connecting element made of electrically conductive material is provided on the actuating element
  • the electrical connection element contacted the two heat sinks, so that then a current can flow through the electrical connection element to the other heat sink, the previously flowing through the wire current is reduced accordingly or even negligible.
  • the electrical connection element therefore causes a short circuit when the current flowing through the wire becomes at least negligibly small.
  • the two heat sinks are therefore also part of the
  • the actuator comprises a spring which
  • Shape memory alloy returns to its original shape by cooling
  • Locking device of a motor vehicle body In a
  • the actuator is part of a device for unlocking a lock, so for example in the manner known from the document DE 102004 040566 AI.
  • the actuator is incorporated in an electrical component carrier, such as in the known from the document DE 10320441 B3 Component carrier, Such a component carrier is in particular part of a door closure, in particular for a motor vehicle or for a building.
  • the shape memory alloy is preferably selected such that the activation temperature is between 100 ° C and 150 ° C, in particular when the actuator is in a motor vehicle
  • the actuator is preferably constructed so that the length of a wire consisting of the shape memory alloy through
  • a diameter of the wire of 0.1 to 1 mm, preferably from 0.2 to 0.4 mm has proved to be useful.
  • the actuator is used in particular in a lock or a
  • Closing device used, the lock or the locking device may be part of a motor vehicle or building.
  • Fig.2 Actuator in the end position
  • Figure 1 outlines an actuator 1 with a rod-shaped
  • Control element 2 which is mounted longitudinally displaceable through bores in the housing 3.
  • the actuator 1 comprises as a drive means a wire 4, which consists of a shape memory alloy.
  • the two ends 5 and 6 of the wire 4 are attached to two heat sinks 7 and 8.
  • the ends 5 and 6 of the wire 4 can be clamped by means of screws 9 and 10, for example.
  • the wire 4 is in
  • the guide member 11 is preferably made of a relatively soft material such as plastic and is attached to the actuator 2.
  • the wire 4 passes through a lateral recess in the control element 2 and can therefore be inserted particularly easily and quickly into the recess. The wire is in the recess, the wire is held by this recess.
  • the wire 4 is thereby mechanically tensioned and held in its intended position, From the housing 3 lead electrical contacts 14 and 15 of the heat sink 7 and 8 out and in opposite directions. When a voltage is applied to the electrical contacts, an electric current flows through the wire 4.
  • the wire 4 in itself constitutes an electrical resistance and heats up due to the electrical current flowing through it.
  • Connecting element 12 is now pressed against the two contact tips 17 and 18 of the heat sink 7 and 8.
  • the wire 4 is predominantly on the two heat sinks 7 and 8 and contacted in this sense, the two heatsink.
  • Heat can rather be accelerated out of the wire due to the corresponding contact in the heatsink. If the current flow is interrupted, the wire cools quickly and assumes its original shape. The spring 13 then presses the actuator 2 in his starting position back. The actuator is therefore mainly used when a short mechanical pulse is to be generated.
  • the housing 3 is 59 mm wide and 19 mm high in the illustrated embodiment.
  • the case depth is 8.1 mm.
  • the weight of the actuator shown was without the metal
  • the weight of the actuator was 6g.
  • an actuator with a weight of less than 20g can be easily manufactured.
  • the actuator can therefore be built very compact.
  • the contacts 14 and 15 do not need to be led laterally out of the housing 3 as shown. Instead, for example, they may extend up out of the housing 3.
  • the actuator shown in Figures 1 and 2 succeeds with the specified housing dimension by shortening the wire 4 by 4.8%, a stroke of the actuator of 4 mm. Since the actuator 2 leads out of two sides of the housing, the actuator can be designed for stroke or train.
  • the diameter of the wire 4 can be adapted to the desired situation. With a thicker wire, a higher lifting or pulling force can be generated. A thinner wire cools faster and therefore allows greater dynamics.
  • the actuator could be moved by switching the current from the starting position to the end position.
  • FIG. 4 shows an improved embodiment comprising a spring 20.
  • the spring 20 is between the electrical
  • Connecting element 12 and the guide member 11 is arranged.
  • connection element 12 is slidably mounted and can therefore be moved along the control element 2. Shortened the wire due to the passing of the
  • the electrical connection element 12 is resiliently pressed against contact tips 17 and 18. An abrupt loading of the wire 4 on reaching the end position is so
  • the electrical connection element 12 is preferably fixedly connected to the control element 2 when the guide element 11 is slidably disposed along the control element 2. In this way it is avoided that a shortening of the wire 4 can be stopped abruptly due to heating by a hard stop ,
  • the spring force of the spring 20, which is arranged between the electrical connection element 12 and the guide element 11, is preferably greater than the spring force of the spring 13, with the cold wire 4 is pressed into its initial position, the spring 13 presses against the fixedly arranged electrical connection element 12 and moves after a sufficient cooling of the wire 4 the
  • Shape change the arm 21 moves.
  • the displacement of the arm 21 causes a displacement of the actuating element. If the actuator by heating the wire in the direction of the housing side
  • Short circuit then flows the current, for example, from the electrical outer contact 14 to the electrical outer contact 15 no longer through the shape memory alloy consisting of the existing wire 4, but via the electrically conductive arm 21 in the electrically conductive actuator 2 in and from here on the short
  • the wire 4 has a resistor 24. If the switch 26 is closed and the resistance 25 of this parallel electrical line is much smaller than the resistance 24 of the wire 4, the current flow through the wire 4 is almost completely interrupted, but a current flows only under the condition that the switch 27 has previously been closed, which represents the activation of an actuator, LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Micromachines (AREA)

Abstract

L'invention concerne un actionneur permettant de convertir de l'énergie thermique en travail mécanique. Le but de l'invention est de créer un actionneur fonctionnel à base d'un alliage à mémoire de forme. Pour ce faire, un actionneur comporte un élément de réglage apte à être déplacé d'une position initiale à une position finale à l'aide d'un dispositif d'entraînement qui possède un alliage à mémoire de forme. Le déplacement jusqu'à la position finale permet d'établir un contact entre l'alliage à mémoire de forme et un corps de refroidissement. En variante ou en complément, le déplacement jusqu'à la position finale est arrêté ou du moins réduit par un élément de commutation du courant permettant d'échauffer l'alliage à mémoire de forme.
PCT/DE2011/001488 2010-07-30 2011-07-20 Actionneur doté d'un alliage à mémoire de forme WO2012013180A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010038700.2A DE102010038700B4 (de) 2010-07-30 2010-07-30 Aktuator mit Formgedächtnislegierung
DE102010038700.2 2010-07-30

Publications (2)

Publication Number Publication Date
WO2012013180A2 true WO2012013180A2 (fr) 2012-02-02
WO2012013180A3 WO2012013180A3 (fr) 2012-04-26

Family

ID=44925201

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2011/001488 WO2012013180A2 (fr) 2010-07-30 2011-07-20 Actionneur doté d'un alliage à mémoire de forme

Country Status (2)

Country Link
DE (1) DE102010038700B4 (fr)
WO (1) WO2012013180A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9893341B2 (en) * 2014-03-18 2018-02-13 Contemporary Amperex Technology Limited Battery pack and device for connecting tabs of battery cells in the same
CN112154268A (zh) * 2018-06-22 2020-12-29 艾斯科技公司 摆动型形状记忆合金致动器
GB2602626A (en) * 2020-12-30 2022-07-13 Cambridge Mechatronics Ltd Actuator
WO2022214188A1 (fr) * 2021-04-08 2022-10-13 Siemens Aktiengesellschaft Dispositif de verrouillage d'un interrupteur électrique et interrupteur électrique comportant un tel dispositif

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014002358B4 (de) 2014-02-18 2015-10-29 Bundesrepublik Deutschland, vertreten durch das BMVg, vertreten durch das Bundesamt für Ausrüstung, Informationstechnik und Nutzung der Bundeswehr Kettenkörper für Gleisketten
IT201900003589A1 (it) * 2019-03-12 2020-09-12 Actuator Solutions GmbH Attuatore multistabile basato su fili in lega a memoria di forma
DE102023200359B3 (de) 2023-01-18 2024-06-06 Robert Bosch Gesellschaft mit beschränkter Haftung Aktoreinrichtung mit granularem Formgedächtnismaterial, Benutzerschnittstellenvorrichtung für ein Fahrzeug, Verfahren zum Betreiben einer Aktoreinrichtung oder einer Benutzerschnittstellenvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3820877A1 (de) 1988-06-21 1989-12-28 Kern & Liebers Vorrichtung zur fernbetaetigung von schloessern und aehnlichen schliesseinrichtungen
DE29914843U1 (de) 1999-08-25 1999-12-16 Dreefs Gmbh Schaltgeraete Durch Wärme betätigter Schalter
DE10320441B3 (de) 2003-05-08 2005-03-03 Kiekert Ag Komponententräger
DE102004040566A1 (de) 2004-08-21 2006-02-23 Daimlerchrysler Ag Vorrichtung zur Entriegelung
DE102008012439A1 (de) 2008-02-29 2009-09-03 Audi Ag Hebel-Hilfsmechanismus für Schließvorrichtungen einer Kraftfahrzeugkarosserie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002068820A1 (fr) * 2001-02-22 2002-09-06 Nanomuscle, Inc. Actionneur d'alliage a memoire de forme a regulation de temperature amelioree
US6668550B2 (en) * 2001-11-26 2003-12-30 Sony Corporation Method and apparatus for converting dissipated heat to work energy
EP1340870B1 (fr) * 2002-02-27 2009-11-18 emz-Hanauer GmbH & Co. KGaA Ensemble avec actionneur à métal doué de mémoire pour verrouillage de portes d'appareils domestique
US6972659B2 (en) * 2002-05-06 2005-12-06 Alfmeier Praezision Ag Reusable shape memory alloy activated latch
JP4946675B2 (ja) * 2007-07-05 2012-06-06 コニカミノルタオプト株式会社 形状記憶合金の駆動装置およびそれを用いる撮像装置ならびに形状記憶合金の駆動方法
WO2009103159A1 (fr) * 2008-02-21 2009-08-27 Canadian Space Agency Commande à rétroaction pour actionneurs en alliage à mémoire de forme

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3820877A1 (de) 1988-06-21 1989-12-28 Kern & Liebers Vorrichtung zur fernbetaetigung von schloessern und aehnlichen schliesseinrichtungen
DE29914843U1 (de) 1999-08-25 1999-12-16 Dreefs Gmbh Schaltgeraete Durch Wärme betätigter Schalter
DE10320441B3 (de) 2003-05-08 2005-03-03 Kiekert Ag Komponententräger
DE102004040566A1 (de) 2004-08-21 2006-02-23 Daimlerchrysler Ag Vorrichtung zur Entriegelung
DE102008012439A1 (de) 2008-02-29 2009-09-03 Audi Ag Hebel-Hilfsmechanismus für Schließvorrichtungen einer Kraftfahrzeugkarosserie

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9893341B2 (en) * 2014-03-18 2018-02-13 Contemporary Amperex Technology Limited Battery pack and device for connecting tabs of battery cells in the same
CN112154268A (zh) * 2018-06-22 2020-12-29 艾斯科技公司 摆动型形状记忆合金致动器
CN112154268B (zh) * 2018-06-22 2022-10-04 艾斯科技公司 摆动型形状记忆合金致动器
GB2602626A (en) * 2020-12-30 2022-07-13 Cambridge Mechatronics Ltd Actuator
GB2602626B (en) * 2020-12-30 2023-07-12 Cambridge Mechatronics Ltd Actuator
WO2022214188A1 (fr) * 2021-04-08 2022-10-13 Siemens Aktiengesellschaft Dispositif de verrouillage d'un interrupteur électrique et interrupteur électrique comportant un tel dispositif

Also Published As

Publication number Publication date
DE102010038700B4 (de) 2021-04-29
DE102010038700A1 (de) 2012-02-02
WO2012013180A3 (fr) 2012-04-26

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