JPH07237599A - Shape memory alloy actuator for space equipment - Google Patents
Shape memory alloy actuator for space equipmentInfo
- Publication number
- JPH07237599A JPH07237599A JP6032337A JP3233794A JPH07237599A JP H07237599 A JPH07237599 A JP H07237599A JP 6032337 A JP6032337 A JP 6032337A JP 3233794 A JP3233794 A JP 3233794A JP H07237599 A JPH07237599 A JP H07237599A
- Authority
- JP
- Japan
- Prior art keywords
- memory alloy
- shape memory
- alloy spring
- cover
- spring
- 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.)
- Pending
Links
Landscapes
- Manipulator (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば人工衛星に用
いられるソーラーセイルのような、電機的なＯＮ−ＯＦ
Ｆ信号によって展開、収納動作をさせる宇宙用機器のた
めの、形状記憶合金アクチュエータに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric ON-OF such as a solar sail used for an artificial satellite.
The present invention relates to a shape memory alloy actuator for space equipment that is expanded and stored by an F signal.
【０００２】[0002]
【従来の技術】図５、６は例えば従来の宇宙機器用形状
記憶合金アクチュエータを示す図であり、図において、
１は中空のパイプ、２は上記パイプ１の内部に配置され
たヒータ、３は上記パイプ１の外側に配置され一端を上
記パイプ１に取付けられた形状記憶合金ばね、４は上記
形状記憶合金ばね３の他端に取付けられ上記パイプ１に
スライド可能な状態に組込まれたスライダである。2. Description of the Related Art FIGS. 5 and 6 are views showing a conventional shape memory alloy actuator for space equipment.
Reference numeral 1 is a hollow pipe, 2 is a heater arranged inside the pipe 1, 3 is a shape memory alloy spring having an outer end of the pipe 1 and one end attached to the pipe 1, and 4 is a shape memory alloy spring. 3 is a slider attached to the other end of the slider 3 and incorporated in the pipe 1 in a slidable state.
【０００３】次に動作について説明する。形状記憶合金
ばね３は高温状態においてたとえばばねが縮む状態に変
態するようあらかじめ熱処理されており、常温あるいは
低温状態では図には示していない外部ばね等により、図
５に示すように引き伸ばされた状態に保持されている。
この状態から、図には示されていない電源装置によりヒ
ータ２を通電加熱し、その熱によりヒータ２を支持して
いるパイプ１を通して形状記憶合金ばね３をオーステナ
イト変態完了温度（Ａｆ点）以上に加熱することによ
り、形状記憶合金ばね３は縮み側に力を発生し、図には
示していない外部ばね等の保持力に打ち勝ってスライダ
４を図中左方向に変位させ、図６に示す状態に移行す
る。ヒータ２の通電加熱をやめると、形状記憶合金ばね
３は外部との熱交換によりマルテンサイト変態完了温度
（Ｍｆ点）以下に冷却され縮み側の発生力を失い、外部
ばね等の力により引き延ばされ元の図５の状態に戻る。Next, the operation will be described. The shape memory alloy spring 3 is preheated in a high temperature state so as to be transformed into a contracted state, and is stretched as shown in FIG. 5 by an external spring or the like not shown in the figure at room temperature or low temperature. Held in.
From this state, the heater 2 is energized and heated by a power supply device (not shown), and the heat causes the shape memory alloy spring 3 to rise above the austenite transformation completion temperature (Af point) through the pipe 1 supporting the heater 2. By heating, the shape memory alloy spring 3 generates a force on the contraction side, overcoming the holding force of an external spring or the like not shown in the drawing to displace the slider 4 leftward in the drawing, and the state shown in FIG. Move to. When the electric heating of the heater 2 is stopped, the shape memory alloy spring 3 is cooled to a temperature below the martensite transformation completion temperature (Mf point) by heat exchange with the outside and loses the force generated on the contraction side and is expanded by the force of the external spring or the like. It returns to the original state shown in FIG.
【０００４】次に熱の流れについて説明する。冷却時
は、図には示していないが形状記憶合金アクチュエータ
の周辺をとり取り囲む極低温の宇宙空間への熱放射によ
り形状記憶合金ばね３が直接冷却される。加熱時は、ヒ
ータ２を通電加熱することにより主に熱放射によりパイ
プ１が加熱され、更にパイプ１からの熱放射と、わずか
ではあるがパイプ１と形状記憶合金ばね３の接触部から
の熱伝導により宇宙空間への熱放射を上回って形状記憶
合金ばね３が加熱される。Next, the flow of heat will be described. At the time of cooling, although not shown in the figure, the shape memory alloy spring 3 is directly cooled by heat radiation to the cryogenic space surrounding the shape memory alloy actuator. At the time of heating, the pipe 1 is heated mainly by heat radiation by electrically heating the heater 2, and further the heat radiation from the pipe 1 and the heat from the contact portion between the pipe 1 and the shape memory alloy spring 3 to a small extent. Due to the conduction, the shape memory alloy spring 3 is heated to exceed the heat radiation to outer space.
【０００５】[0005]
【発明が解決しようとする課題】従来の宇宙機器用形状
記憶合金アクチュエータは以上のように構成されている
ため、形状記憶合金の熱交換には対流はなく伝導もわず
かであり、放射による加熱・冷却がその大部分を占め
る。形状記憶合金ばね３の加熱はヒータ２により能動的
に行なわれるが、冷却は受動的であるため、冷却効果を
高めることを目的に形状記憶合金ばねと極低温の宇宙空
間との放射結合を多くしている。このため、加熱状態で
のヒータ２、パイプ１、形状記憶合金ばね３、及び宇宙
空間の間の温度差が極端に大きく、各部の放射熱結合状
態のわずかな違いにより、形状記憶合金ばね３の内部に
温度差が発生する。また、パイプ１と形状記憶合金ばね
３の接触状態も場所によってまちまちであり、さらに、
形状記憶合金ばね３の力の発生過程、変位過程におい
て、この接触状態が変化するため、上記形状記憶合金ば
ね３の内部温度差を一層増大させる。この温度差は、状
態によっては約４０〜５０℃にもなることが各種試験に
より明らかになっている。Since the conventional shape memory alloy actuator for space equipment is constructed as described above, there is no convection in the heat exchange of the shape memory alloy, and there is little conduction. Cooling accounts for the majority. The shape memory alloy spring 3 is actively heated by the heater 2, but the cooling is passive, so that the shape memory alloy spring is often radiatively coupled to the cryogenic space for the purpose of enhancing the cooling effect. is doing. Therefore, the temperature difference among the heater 2, the pipe 1, the shape memory alloy spring 3 and the outer space in the heated state is extremely large, and due to the slight difference in the radiative heat coupling state of each part, the shape memory alloy spring 3 is A temperature difference occurs inside. Also, the contact state between the pipe 1 and the shape memory alloy spring 3 varies depending on the place, and further,
Since the contact state changes in the process of generating force and the process of displacement of the shape memory alloy spring 3, the internal temperature difference of the shape memory alloy spring 3 is further increased. Various tests have revealed that this temperature difference is as high as about 40 to 50 ° C. depending on the state.
【０００６】ここで、形状記憶合金ばね３の加熱時の発
生力は、ばね内部温度のばらつきのうち最も低い温度に
よって支配されることが各種試験により明かになってお
り、一方、形状記憶合金ばね３の発生力の劣化は、ばね
の内部温度がオーステナイト変態完了温度（Ａｆ点）に
比較して高すぎる場合に顕著である。たとえば、Ｔｉ−
Ｎｉの二元系、あるいはＴｉ−Ｎｉ−Ｃｕの三元系の形
状記憶合金の場合、この発生力劣化の目安となる温度は
Ａｆ＋６０℃程度である。このため、形状記憶合金ばね
３の内部の温度差が大きい場合は、発生力の劣化を防ぐ
ため形状記憶合金ばね３の平均的加熱温度を高く設定す
ることができず、ばね内部温度の最も低い温度も低く高
い発生力が得られないため、結果として動作抵抗力、劣
化等の観点から動作信頼性が低く、場合によっては真空
低温環境下での設計解が無いという問題点があった。Here, various tests have revealed that the force generated when the shape memory alloy spring 3 is heated is governed by the lowest temperature among the variations in the temperature inside the spring. The deterioration of the generated force of No. 3 is remarkable when the internal temperature of the spring is too high compared to the austenite transformation completion temperature (Af point). For example, Ti-
In the case of a Ni-based shape memory alloy or a Ti-Ni-Cu ternary shape memory alloy, the temperature that is a guideline for deterioration of the generated force is about Af + 60 ° C. Therefore, when the temperature difference inside the shape memory alloy spring 3 is large, the average heating temperature of the shape memory alloy spring 3 cannot be set high in order to prevent the generation force from deteriorating, and the spring internal temperature is the lowest. Since the temperature is low and a high generative force cannot be obtained, as a result, there is a problem that the operation reliability is low from the viewpoint of operation resistance and deterioration, and in some cases, there is no design solution in a vacuum low temperature environment.
【０００７】この発明は上記のような問題点を解消する
ためになされたもので、形状記憶合金ばね３の加熱時の
ばね内部の温度のばらつきを小さく抑えることにより、
形状記憶合金ばね３の加熱時発生力を高めかつ発生力劣
化の少ない、動作信頼性の高い宇宙機器用形状記憶合金
アクチュエータを得ることを目的としている。The present invention has been made in order to solve the above-mentioned problems, and suppresses the temperature variation inside the shape memory alloy spring 3 when the shape memory alloy spring 3 is heated.
An object of the present invention is to obtain a shape memory alloy actuator for space equipment, which has a high generated force at the time of heating the shape memory alloy spring 3 and has little deterioration in the generated force and has high operation reliability.
【０００８】[0008]
【課題を解決するための手段】この発明に係る宇宙機器
用形状記憶合金アクチュエータは、形状記憶合金ばねの
外側を覆うカバーをパイプあるいはスライダーに取付け
たものである。In the shape memory alloy actuator for space equipment according to the present invention, a cover for covering the outside of the shape memory alloy spring is attached to a pipe or a slider.
【０００９】また、この発明に係る宇宙機器用形状記憶
合金アクチュエータは、互いに入り込むように構成され
た第１のカバーと、第２のカバーとをパイプ及びスライ
ダーに取付けたものである。Further, the shape memory alloy actuator for space equipment according to the present invention has a first cover and a second cover, which are configured to enter each other, attached to a pipe and a slider.
【００１０】また、上記第１のカバーと第２のカバーに
よりスライド動作を支持する構成とし、上記パイプをな
くすることにより、上記ヒータが上記形状記憶合金ばね
を直接覗くように取付ける。Further, the first cover and the second cover are configured to support the sliding motion, and the pipe is eliminated, so that the heater is mounted so as to directly look into the shape memory alloy spring.
【００１１】また、上記ヒータを上記形状記憶合金ばね
が伸びた時の長さとほぼ同じ長さとして、動作時に上記
ヒータが上記形状記憶合金ばねをほぼ同じ割合で覗くよ
うな構成とする。Further, the heater has substantially the same length as the length of the shape memory alloy spring when it is extended, and the heater looks into the shape memory alloy spring at substantially the same ratio during operation.
【００１２】[0012]
【作用】この発明における宇宙機器用形状記憶合金アク
チュエータは、上記のように構成されているので、ヒー
タで加熱されたパイプからの熱伝導及び熱放射にてカバ
ーが加熱されるため、形状記憶合金ばねが放射熱結合し
ている周辺部の温度差が緩和され、加熱時の形状記憶合
金ばね内部の温度差を小さくすることができるため、形
状記憶合金ばね内部の温度を形状記憶合金ばねの発生力
劣化の生じない温度に保ちつつ、形状記憶合金ばね内部
の最低温度を高くその発生力を高くすることができ、高
い動作信頼性が得られる。Since the shape memory alloy actuator for space equipment according to the present invention is configured as described above, since the cover is heated by heat conduction and heat radiation from the pipe heated by the heater, the shape memory alloy actuator. The temperature difference in the peripheral portion where the spring is radiatively coupled is relaxed, and the temperature difference inside the shape memory alloy spring during heating can be reduced, so the temperature inside the shape memory alloy spring is generated by the shape memory alloy spring. It is possible to increase the minimum temperature inside the shape memory alloy spring and increase the generated force while maintaining the temperature at which force deterioration does not occur, and to obtain high operational reliability.
【００１３】また、互いに入り込むように構成された第
１、第２のカバーにより、アクチュエータの直動ストロ
ークを確保したまま、上記形状記憶合金ばねをほぼ完全
に覆うことができるため、上記加熱時の形状記憶合金ば
ね内部の温度差をいっそう小さくすることができる。Further, the shape memory alloy spring can be almost completely covered with the linear stroke of the actuator being secured by the first and second covers which are configured to enter each other. The temperature difference inside the shape memory alloy spring can be further reduced.
【００１４】また、上記第１、第２のカバーによりスラ
イド動作を支持する構成とすることにより、上記パイプ
をなくし上記ヒータが直接上記形状記憶合金ばねを覗く
ように構成することによって、パイプと形状記憶合金ば
ねの接触部が無くなるため熱伝導の差によるばね内部の
温度差が緩和され、上記と同様な作用が期待できる。Further, by adopting a structure in which the sliding action is supported by the first and second covers, the pipe is eliminated, and the heater is configured to directly look into the shape memory alloy spring. Since the contact portion of the memory alloy spring is eliminated, the temperature difference inside the spring due to the difference in heat conduction is alleviated, and the same effect as above can be expected.
【００１５】また、上記ヒータを上記形状記憶合金ばね
が伸びた時とほぼ同じ長さにすることにより、アクチュ
エータの直動ストロークの全範囲においてヒータが形状
記憶合金を覗く割合を同様に保つことができるため、上
記と同様な作用が期待できる。Further, by making the heater have substantially the same length as when the shape memory alloy spring is stretched, it is possible to maintain the same proportion of the heater looking into the shape memory alloy in the entire range of the linear motion stroke of the actuator. Therefore, the same effect as above can be expected.
【００１６】[0016]
実施例１．以下、この発明の一実施例を図について説明
する。図１はこの発明の実施例１を示す断面図、図２は
その加熱時動作状態を示す図であり、１〜４は上記従来
の宇宙機器用形状記憶合金アクチュエータと全く同一の
ものである。５は形状記憶合金ばね３の外側を覆うよう
に配置されたアルミ合金などの金属もしくはポリイミド
フィルムなどの熱硬化性樹脂等でできたカバーであり、
図ではカバー５がパイプ１に取付けられた場合を示して
いる。図には、冷却時図２の状態から図１の状態に復帰
させるための外部ばね、およびヒータ２を加熱するため
の外部電源装置、及び周辺の宇宙空間は示していない。Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing a first embodiment of the present invention, and FIG. 2 is a view showing an operating state thereof during heating, and 1 to 4 are exactly the same as the conventional shape memory alloy actuator for space equipment. Reference numeral 5 is a cover made of a metal such as an aluminum alloy or a thermosetting resin such as a polyimide film arranged so as to cover the outside of the shape memory alloy spring 3.
The figure shows a case where the cover 5 is attached to the pipe 1. The figure does not show the external spring for returning the state of FIG. 2 to the state of FIG. 1 during cooling, the external power supply device for heating the heater 2, and the outer space around it.
【００１７】前述のように構成された宇宙機器用形状記
憶合金アクチュエータにおいては、その加熱動作時、ヒ
ータ２で加熱されたパイプ１からの熱伝導及び熱放射に
よりカバー５が加熱されるため、形状記憶合金ばね３が
放射熱結合している周辺部の温度差が緩和され、形状記
憶合金ばね３の内部の温度差を小さくできるため、高い
動作信頼性を有する宇宙機器用形状記憶合金アクチュエ
ータが得られる。In the shape memory alloy actuator for space equipment constructed as described above, during the heating operation, the cover 5 is heated by heat conduction and heat radiation from the pipe 1 heated by the heater 2, so that the shape is Since the temperature difference in the peripheral portion where the memory alloy spring 3 is radiatively thermally coupled is relaxed and the temperature difference inside the shape memory alloy spring 3 can be reduced, a shape memory alloy actuator for space equipment having high operational reliability is obtained. To be
【００１８】実施例２．図３は、この発明の実施例２を
示す断面図であり、上記実施例１のカバー５に加えてさ
らにカバー５と重なるように構成されスライダー４に取
付けられた第２のカバー６を備えたものであり、形状記
憶合金ばね３をほぼ完全に覆っているため、上記実施例
１と同様もしくはそれ以上の効果が達成出来る。Example 2. FIG. 3 is a cross-sectional view showing a second embodiment of the present invention. In addition to the cover 5 of the first embodiment, a second cover 6 attached to the slider 4 is further provided so as to overlap the cover 5. Since the shape memory alloy spring 3 is almost completely covered, it is possible to achieve the same effect as that of the first embodiment or more.
【００１９】実施例３．図４はこの発明の実施例３を示
す断面図であり、上記実施例１のパイプ１をなくしヒー
タ２を固定部７で支持することにより、ヒータ２と形状
記憶合金ばね３の間の遮蔽物をなくしヒータ２が直接形
状記憶合金ばね３を直接覗くように取付け、スライダ４
の動作支持をパイプ１ではなく上記実施例２の第１のカ
バー５と第２のカバー６に持たせるように構成したもの
であり、パイプ１と形状記憶合金ばね３の接触部が無く
なるためこの部分からの熱伝導の差による形状記憶合金
ばね３の内部温度差が緩和される。さらに上記ヒータ２
の長さを形状記憶合金ばね３が伸びた時の長さとほぼ同
じ長さにすることにより、直動ストロークの全範囲にお
いてヒータ２と形状記憶合金ばね３の放射熱結合をほぼ
均一に維持することができ、形状記憶合金ばね３の内部
温度差がさらに緩和され、上記実施例１及び２と同様も
しくはそれ以上の効果が期待出来る。Example 3. FIG. 4 is a cross-sectional view showing a third embodiment of the present invention, in which the pipe 1 of the first embodiment is eliminated and the heater 2 is supported by the fixing portion 7, whereby a shield between the heater 2 and the shape memory alloy spring 3 is provided. The heater 2 is attached so that the shape memory alloy spring 3 is directly seen, and the slider 4
In this embodiment, the first support 5 and the second cover 6 of the second embodiment are provided with the above-mentioned operation support instead of the pipe 1, and the contact portion between the pipe 1 and the shape memory alloy spring 3 is eliminated. The difference in internal temperature of the shape memory alloy spring 3 due to the difference in heat conduction from the portion is reduced. Furthermore, the heater 2
Is set to be substantially the same as the length when the shape memory alloy spring 3 is extended, so that the radiant heat coupling between the heater 2 and the shape memory alloy spring 3 is maintained substantially uniform in the entire range of the linear motion stroke. Therefore, the internal temperature difference of the shape memory alloy spring 3 is further alleviated, and the same effect as or more than those of the first and second embodiments can be expected.
【００２０】また、上記実施例１から３においては、低
温状態に復帰させるための外部ばねは図示していない
が、アクチュエータ内部に形状記憶合金ばね３と一緒に
組込まれていても所期の目的を達成することはいうまで
もない。In the first to third embodiments described above, the external spring for returning to the low temperature state is not shown, but even if the external memory is incorporated into the actuator together with the shape memory alloy spring 3, the intended purpose is obtained. Needless to say,
【００２１】また、上記実施例１から３においては、形
状記憶合金ばね３が高温状態においてばねが縮む状態に
変態するよう設定されている場合を示したが、逆にばね
が伸びる状態に変化するよう設定されている場合でも所
期の目的を達成することはいうまでもない。Further, in the above-mentioned first to third embodiments, the case where the shape memory alloy spring 3 is set so as to transform into a state in which the spring contracts at a high temperature is shown. However, conversely, the spring expands. It goes without saying that the intended purpose will be achieved even if such settings are made.
【００２２】ところで上記説明では、この発明を例えば
人工衛星に用いられるソーラーセイルのような、電気的
ＯＮ−ＯＦＦ信号によって機器の展開、収納動作をさせ
る宇宙機器用形状記憶合金アクチュエータに利用する場
合について述べたが、その他地上用などの形状記憶合金
アクチュエータにも利用できることはいうまでもない。By the way, in the above description, the present invention is applied to a shape memory alloy actuator for space equipment, such as a solar sail used for artificial satellites, which develops and stores the equipment by electrical ON-OFF signals. As mentioned above, it goes without saying that it can be applied to other shape memory alloy actuators for ground use.
【００２３】[0023]
【発明の効果】この発明は、以上説明したように構成さ
れているので、以下に記載されるような効果を有する。Since the present invention is constructed as described above, it has the following effects.
【００２４】形状記憶合金ばねの外側を覆うカバーを取
付けることにより、形状記憶合金ばねが放射熱結合して
いる周辺部の温度差を緩和し、形状記憶合金ばね内部の
温度差を小さく押さえ、形状記憶合金ばね内部の温度を
形状記憶合金ばねの発生力劣化の生じない温度に保ちつ
つ、形状記憶合金ばね内部の最低温度を高くその発生力
を高くすることができるため、動作時抵抗力や特性劣化
に対して高い信頼性を有した宇宙機器用形状記憶合金ア
クチュエータが得られる。By attaching a cover that covers the outside of the shape memory alloy spring, the temperature difference in the peripheral portion where the shape memory alloy spring is radiatively coupled is relaxed, and the temperature difference inside the shape memory alloy spring is suppressed to a small value. It is possible to increase the minimum temperature inside the shape memory alloy spring and raise the generated force while maintaining the temperature inside the memory alloy spring at a temperature at which the generated force of the shape memory alloy spring does not deteriorate, so that the resistance force during operation and characteristics A shape memory alloy actuator for space equipment having high reliability against deterioration can be obtained.
【００２５】また、第１のカバーと第２のカバーを重ね
る構成とすることにより、加熱時、形状記憶合金ばねの
全動作範囲にわたって形状記憶合金ばねの外側を完全に
覆うことができるため、形状記憶合金ばね内部の温度差
をさらに小さくすることができ、上記と同様もしくはそ
れ以上の高い信頼性を有した宇宙機器用形状記憶合金ア
クチュエータが得られる。Further, by arranging the first cover and the second cover so as to overlap with each other, the outer shape of the shape memory alloy spring can be completely covered over the entire operating range of the shape memory alloy spring during heating. The temperature difference inside the memory alloy spring can be further reduced, and a shape memory alloy actuator for space equipment having high reliability equal to or higher than the above can be obtained.
【００２６】また、パイプをなくしヒータが形状記憶合
金ばねを直接覗く構成とすることにより、パイプと形状
記憶合金ばねの部分的なばらつきの大きい接触伝導をな
くすることができるため、形状記憶合金ばね内部の温度
差をさらに小さくすることができ、上記と同様もしくは
それ以上の高い信頼性を有した宇宙機器用形状記憶合金
アクチュエータが得られる。Further, by eliminating the pipe and by making the heater directly look into the shape memory alloy spring, it is possible to eliminate the contact conduction which has a large variation locally between the pipe and the shape memory alloy spring. The internal temperature difference can be further reduced, and a shape memory alloy actuator for space equipment having a high reliability equal to or higher than the above can be obtained.
【００２７】また、ヒータの長さを形状記憶合金ばねが
伸びた時の長さとほぼ同じ長さとすることにより、形状
記憶合金ばねの全動作範囲にわたって形状記憶合金ばね
の各部分とヒータとの放射熱結合をほぼ均一に維持する
ことができるため、形状記憶合金ばね内部の温度差をさ
らに小さくすることができ、上記と同様もしくはそれ以
上の高い信頼性を有した宇宙機器用形状記憶合金アクチ
ュエータが得られる。Further, by making the length of the heater substantially the same as the length when the shape memory alloy spring is extended, the radiation of each part of the shape memory alloy spring and the heater over the entire operating range of the shape memory alloy spring. Since the thermal coupling can be maintained substantially evenly, the temperature difference inside the shape memory alloy spring can be further reduced, and a shape memory alloy actuator for space equipment having high reliability equal to or higher than the above can be provided. can get.
【図１】この発明の実施例１の低温通常状態を示す断面
図である。FIG. 1 is a cross-sectional view showing a low temperature normal state of Embodiment 1 of the present invention.
【図２】この発明の実施例１の高温動作状態を示す断面
図である。FIG. 2 is a cross-sectional view showing a high temperature operating state of Embodiment 1 of the present invention.
【図３】この発明の実施例２を示す断面図である。FIG. 3 is a sectional view showing a second embodiment of the present invention.
【図４】この発明の実施例３を示す断面図である。FIG. 4 is a sectional view showing Embodiment 3 of the present invention.
【図５】従来の宇宙用形状記憶合金アクチュエータの低
温通常状態を示す断面図である。FIG. 5 is a cross-sectional view showing a low temperature normal state of a conventional space shape memory alloy actuator.
【図６】従来の宇宙用形状記憶合金アクチュエータの高
温動作状態を示す断面図である。FIG. 6 is a cross-sectional view showing a high temperature operating state of a conventional space shape memory alloy actuator.
１ パイプ ２ ヒータ ３ 形状記憶合金ばね ４ スライダ ５ カバーもしくは第１のカバー ６ 第２のカバー ７ 固定部 1 Pipe 2 Heater 3 Shape Memory Alloy Spring 4 Slider 5 Cover or First Cover 6 Second Cover 7 Fixed Part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中川 潤 鎌倉市上町屋325番地 三菱電機株式会社 鎌倉製作所内 (72)発明者 川村 俊一 鎌倉市上町屋325番地 三菱電機株式会社 鎌倉製作所内 (72)発明者 森 康 鎌倉市上町屋325番地 三菱電機株式会社 鎌倉製作所内 (72)発明者 冨田 雅行 鎌倉市上町屋325番地 三菱電機株式会社 鎌倉製作所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Jun Nakagawa 325 Kamimachiya, Kamakura City Mitsubishi Electric Corporation Kamakura Plant (72) Inventor Shunichi Kawamura 325 Kamimachiya Kamakura City Mitsubishi Electric Corporation Kamakura Plant (72) Inventor Yasushi Mori 325 Kamimachiya, Kamakura City Mitsubishi Electric Co., Ltd. Kamakura Factory (72) Inventor Masayuki Tomita 325 Kamimachiya, Kamakura City Mitsubishi Electric Corporation Kamakura Factory
Claims (4)
されたヒータと、上記パイプの外側に配置され一端を上
記パイプに取付けられた形状記憶合金ばねと、上記形状
記憶合金ばねの他端にとりつけられ上記パイプにスライ
ド可能な状態に組込まれたスライダと、上記パイプある
いは上記スライドに一端を固定され上記形状記憶合金ば
ねの外側を覆うように取付けられたカバーとを有するこ
とを特徴とする形状記憶合金アクチュエータ。1. A hollow pipe, a heater arranged inside the pipe, a shape memory alloy spring arranged outside the pipe and having one end attached to the pipe, and the other end of the shape memory alloy spring. A shape comprising: a slider attached to the pipe so as to be slidable therein; and a cover having one end fixed to the pipe or the slide and attached to cover the outside of the shape memory alloy spring. Memory alloy actuator.
られた第１のカバーと、上記スライダに固定され上記第
１のカバーの内側あるいは外側に入りこむように取付け
られた第２のカバーとを備えたことを特徴とする請求項
１記載の形状記憶合金アクチュエータ。2. The cover includes a first cover attached to the pipe and a second cover fixed to the slider so as to enter the inside or the outside of the first cover. The shape memory alloy actuator according to claim 1, wherein:
固定部と、上記ヒータの外側に配置され一端を上記固定
部に取付けられた形状記憶合金ばねと、上記固定部に一
端を固定され上記形状記憶合金ばねの外側を覆うように
取付けられた第１のカバーと、上記第１のカバーの内側
あるいは外側に入り込むようにしてスライド可能な状態
に組込まれた第２のカバーと、上記第２のカバーの他端
に取付けられた上記形状記憶合金ばねの他端を固定する
スライダとを有することを特徴とする形状記憶合金アク
チュエータ。3. A heater, a fixing portion for supporting an end portion of the heater, a shape memory alloy spring arranged outside the heater and having one end attached to the fixing portion, and one end fixed to the fixing portion. A first cover attached so as to cover the outer side of the shape memory alloy spring; a second cover slidably incorporated into the inner side or the outer side of the first cover; 2. A shape memory alloy actuator comprising: a slider for fixing the other end of the shape memory alloy spring attached to the other end of the second cover.
びているときの長さとほぼ同じ長さとしたことを特徴と
する請求項１〜３いずれか記載の形状記憶合金アクチュ
エータ。4. The shape memory alloy actuator according to claim 1, wherein the heater has substantially the same length as the length of the shape memory alloy spring when the heater is extended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6032337A JPH07237599A (en) | 1994-03-02 | 1994-03-02 | Shape memory alloy actuator for space equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6032337A JPH07237599A (en) | 1994-03-02 | 1994-03-02 | Shape memory alloy actuator for space equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07237599A true JPH07237599A (en) | 1995-09-12 |
Family
ID=12356143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6032337A Pending JPH07237599A (en) | 1994-03-02 | 1994-03-02 | Shape memory alloy actuator for space equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07237599A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1130243A2 (en) * | 2000-03-03 | 2001-09-05 | United Technologies Corporation | A variable area nozzle for gas turbine engines driven by shape memory alloy actuators |
| EP1331392A2 (en) * | 2002-01-29 | 2003-07-30 | United Technologies Corporation | System and method for controlling shape memory alloy actuators |
| US7216831B2 (en) | 2004-11-12 | 2007-05-15 | The Boeing Company | Shape changing structure |
| US7340883B2 (en) | 2004-11-12 | 2008-03-11 | The Boeing Company | Morphing structure |
| US7546727B2 (en) | 2004-11-12 | 2009-06-16 | The Boeing Company | Reduced noise jet engine |
| EP3031772A1 (en) * | 2014-12-11 | 2016-06-15 | Ipek International GmbH | Lifting device, in particular for an inspection system |
| CN113915090A (en) * | 2021-10-13 | 2022-01-11 | 燕山大学 | Temperature control slide bar based on honeycomb type memory alloy structure |
-
1994
- 1994-03-02 JP JP6032337A patent/JPH07237599A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1130243A2 (en) * | 2000-03-03 | 2001-09-05 | United Technologies Corporation | A variable area nozzle for gas turbine engines driven by shape memory alloy actuators |
| EP1130243A3 (en) * | 2000-03-03 | 2003-10-01 | United Technologies Corporation | A variable area nozzle for gas turbine engines driven by shape memory alloy actuators |
| US6735936B2 (en) | 2000-03-03 | 2004-05-18 | United Technologies Corporation | Variable area nozzle for gas turbine engines driven by shape memory alloy actuators |
| US7004047B2 (en) | 2000-03-03 | 2006-02-28 | United Technologies Corporation | Variable area nozzle for gas turbine engines driven by shape memory alloy actuators |
| EP1331392A2 (en) * | 2002-01-29 | 2003-07-30 | United Technologies Corporation | System and method for controlling shape memory alloy actuators |
| EP1331392A3 (en) * | 2002-01-29 | 2005-09-07 | United Technologies Corporation | System and method for controlling shape memory alloy actuators |
| US7216831B2 (en) | 2004-11-12 | 2007-05-15 | The Boeing Company | Shape changing structure |
| US7340883B2 (en) | 2004-11-12 | 2008-03-11 | The Boeing Company | Morphing structure |
| US7546727B2 (en) | 2004-11-12 | 2009-06-16 | The Boeing Company | Reduced noise jet engine |
| US7644575B2 (en) | 2004-11-12 | 2010-01-12 | The Boeing Company | Morphing structure |
| US8186143B2 (en) | 2004-11-12 | 2012-05-29 | The Boeing Company | Morphing structure and method |
| US8397485B2 (en) | 2004-11-12 | 2013-03-19 | The Boeing Company | Morphing structure and method |
| EP3031772A1 (en) * | 2014-12-11 | 2016-06-15 | Ipek International GmbH | Lifting device, in particular for an inspection system |
| CN113915090A (en) * | 2021-10-13 | 2022-01-11 | 燕山大学 | Temperature control slide bar based on honeycomb type memory alloy structure |
| CN113915090B (en) * | 2021-10-13 | 2023-03-07 | 燕山大学 | Temperature control slide bar based on honeycomb type memory alloy structure |
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