US20200115827A1 - Actuator and manufacturing method thereof - Google Patents

Actuator and manufacturing method thereof Download PDF

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Publication number
US20200115827A1
US20200115827A1 US16/470,346 US201716470346A US2020115827A1 US 20200115827 A1 US20200115827 A1 US 20200115827A1 US 201716470346 A US201716470346 A US 201716470346A US 2020115827 A1 US2020115827 A1 US 2020115827A1
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Prior art keywords
fiber
angle
twist
actuator
polymer
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US16/470,346
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Jun Kawahara
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Lintec Corp
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Lintec Corp
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Assigned to LINTEC CORPORATION reassignment LINTEC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAWAHARA, JUN
Publication of US20200115827A1 publication Critical patent/US20200115827A1/en
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    • 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
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002—Generators
    • H02N11/004—Generators adapted for producing a desired non-sinusoidal waveform
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides

Definitions

  • the present invention relates to an actuator and a manufacturing method thereof.
  • Patent Document 1 an actuator including a coil-like polymer fiber to which a twist is applied is disclosed.
  • Such an actuator is formed by selecting a precursor polymer fiber having high strength and a high chain orientation, which is a single filament or a multifilament, by applying a twist to the precursor polymer fiber until coiling occurs or applying a twist to the precursor polymer fiber up to a level at which the coiling does not occur, and then, by coiling the initially applied twist in the same or the opposite direction.
  • Patent Document 1 it is described that the actuator including the coil-like polymer fiber to which the twist is applied can be operated to provide tensile contraction or tensile expansion as a result of a temperature change.
  • an optical microscope photograph of the polymer fiber before being coiled represents the characteristics of a spiral surface, and a bias angle a thereof with respect to a fiber direction is represented by the following expression.
  • d is the diameter of the polymer fiber
  • T is the amount of twist to be applied per the length of the polymer fiber.
  • Patent Document 1 Japanese Unexamined Patent Application, First Publication No. 2016-42783
  • the actuator including the non-coil-like polymer fiber to which the twist is applied disclosed in Patent Document 1
  • the present invention has been made in consideration of the circumstances described above, and an object of the present invention is to provide a novel actuator and a manufacturing method thereof, in which a thermally large movable range is exhibited, compared to the related art.
  • an actuator has been found in which a thermally large movable range is exhibited, compared to the related art.
  • a manufacturing method of such an actuator has been found in which the actuator is easily obtained by twisting a fibrous polymer material configured with a polymer having a glass transition temperature of higher than 25° C. under an environment of a temperature which is higher than the glass transition temperature of the polymer.
  • the present invention is as follows.
  • An actuator which is formed of a fibrous polymer material configured with a polymer, and includes a twist mark on an outermost surface of the fibrous polymer material, in which an angle x at which the twist mark is inclined with respect to a fiber axis of the fibrous polymer material, and an angle y at which the twist mark is inclined with respect to a fiber axis of a fiber at the time of twisting the fiber configured with the polymer configuring the fibrous polymer material by adding a tensile stress of an tensile elastic modulus of the fiber ⁇ 4.5 ⁇ 10 ⁇ 3 under an environment of 25° C. up to a limitation on which coiling occurs or a limitation on which a breakage occurs have a relationship of x>y+0.5°.
  • the actuator of the present invention exhibits a thermally large movable range, compared to an actuator of the related art.
  • FIG. 1 is a schematic diagram illustrating an actuator according to a first embodiment of the present invention.
  • FIG. 2 is a graph illustrating an angle of a twist mark and a rotation angle of an actuator sample with respect to the number of twist rotations.
  • An actuator according to a first embodiment of the present invention is an actuator which is formed of a fibrous polymer material configured with a polymer, and includes a twist mark on an outermost surface of the fibrous polymer material, in which an angle x at which the twist mark is inclined with respect to a fiber axis of the fibrous polymer material, and an angle y at which the twist mark is inclined with respect to a fiber axis of a fiber at the time of twisting the fiber configured with the polymer configuring the fibrous polymer material by adding a tensile stress of the tensile elastic modulus of the fiber ⁇ 4.5 ⁇ 10 ⁇ 3 under an environmental temperature of 25° C. up to a limitation on which coiling occurs or a limitation on which a breakage occurs have a relationship of x>y+0.5°.
  • Examples of the polymer configuring the fibrous polymer material include nylon 6,6.
  • a rotation can be performed up to approximately 1,000 times per 1 m, and polymer molecules in the vicinity of the outermost surface can be inclined with respect to a fiber axis of the monofilament up to approximately 44°. Therefore, a twist mark of approximately 44° is generated on the outermost surface of the monofilament.
  • the coiling occurs. That is, the angle y at which the twist mark is inclined with respect to the fiber axis at the time of twisting the monofilament of nylon 6,6 up to the limitation on which the coiling occurs, is approximately 44°.
  • the rotation can be performed up to approximately 500 times per 1 m, and the polymer molecules in the vicinity of the outermost surface of the monofilament can be inclined with respect to the fiber axis up to approximately 44°. Therefore, the twist mark of approximately 44° is generated on the outermost surface of the monofilament. That is, the angle y at which twist mark is inclined with respect to the fiber axis at the time of twisting the monofilament of nylon 6,6 up to the limitation on which the coiling occurs, is approximately 44°.
  • the angle y at which the twist mark is inclined with respect to the fiber axis at the time of twisting the fiber immediately before the coiling occurs is approximately constant regardless of the size (that is, the diameter) of the fiber.
  • the relationship between the angle x at which the twist mark is inclined with respect to the fiber axis and the angle y is x ⁇ y, and the inclination of the twist mark with respect to the fiber axis is small.
  • the suitable tensile stress may have the magnitude of 4.5 ⁇ 10 ⁇ 3 times the tensile elastic modulus of the fiber.
  • the angle x and the angle y have the relationship of x>y+0.5°. For this reason, an orientation to a rotation direction based on the fiber axis of the fibrous polymer material which configures the actuator is more remarkable, and has a thermally large movable range.
  • the angle y is determined as follows. In a case where the tensile stress of the tensile elastic modulus of the fiber ⁇ 4.5 ⁇ 10 ⁇ 3 is added to the fiber configured with the polymer configuring the fibrous polymer material at 25° C., and thus, breakage occurs at the time of twisting the fiber, the angle of the twist mark inclined with respect to the fiber axis in a state where the same fiber is twisted again in the same conditions with the number of rotations less than the number of twist rotations at a time point of the breakage by 10 rotations, and then, is subjected to a residual stress relaxation treatment described below at a temperature which is higher than the glass transition temperature of the polymer configuring the fibrous polymer material by 40° C.
  • the angle of the twist mark inclined with respect to the fiber axis in a state where the fiber is subjected to the residual stress relaxation treatment described below at a temperature which is higher than the glass transition temperature of the polymer configuring the fibrous polymer material by 40° C. or higher for 30 minutes after the coiling occurs is set to y.
  • the relationship between the angle x and the angle y is x>y+0.5°, but is preferably x>y+1°, is more preferably x>y+3°, and is particularly preferably x>y +4°.
  • the relationship between the angle x and the angle y is preferably x ⁇ y+40°, and is more preferably x ⁇ y+30°, from the viewpoint of easily obtaining the actuator according to the first embodiment of the present invention.
  • the angle x at which the twist mark on the outermost surface of the fibrous polymer material is inclined with respect to the fiber axis is preferably greater than or equal to 45°, is more preferably greater than or equal to 46°, and is particularly preferably greater than or equal to 48°. x ⁇ 85° is preferable, and x ⁇ 75° is more preferable, from the viewpoint of easily obtaining the actuator according to the first embodiment of the present invention.
  • a manufacturing method of an actuator according to a second embodiment of the present invention includes a step of twisting a fiber configured with a polymer having a glass transition temperature of higher than 25° C. under an environment of a temperature which is higher than the glass transition temperature of the polymer.
  • the fiber configured with the polymer having the glass transition temperature of higher than 25° C. is twisted under the environment of the temperature which is higher than the glass transition temperature of the polymer. Accordingly, the angle x at which the twist mark on the outermost surface of the fibrous polymer material is inclined with respect to the fiber axis easily becomes larger than the angle y at which the twist mark is inclined with respect to the fiber axis at the time of twisting the fiber under an environment of 25° C. up to the limitation on which the coiling occurs.
  • the angle x at which the twist mark on the outermost surface of the fibrous polymer material is inclined with respect to the fiber axis easily becomes larger than the angle y at which the twist mark is inclined with respect to the fiber axis at the time of twisting the fiber under an environment of 25° C. up to the limitation on which the breakage occurs.
  • the actuator according to the second embodiment of the present invention in the manufacturing method of the actuator according to the second embodiment of the present invention, a large twist is imparted, a rotation movement which occurs by heating on the basis of the fiber axis becomes larger, and the actuator according to the first embodiment of the present invention having a thermally large movable range can be easily obtained, compared to a case where the fiber is twisted under an environment of 25° C. as with actuator of the related art.
  • the environment of the temperature in the step of twisting the fiber is not limited insofar as the environment is an environment of a temperature which is higher than the glass transition temperature of the polymer, but it is preferable that the environment of the temperature is higher than the glass transition temperature of the polymer by 10° C. or higher, and it is more preferable that the environment of the temperature is higher than the glass transition temperature of the polymer by 20° C. or higher. It is particularly preferable that the environment of the temperature is higher than the glass transition temperature of the polymer by 40° C. or higher. It is useful to set the environment of the temperature in the step of twisting the fiber to be a higher temperature from the viewpoint that it is possible to decrease the torque which is required for twisting the fiber and to extremely easily twist a thick fiber or a rigid fiber which requires large torque.
  • the residual stress relaxation treatment such as placing the fibrous polymer material in an environment of higher than or equal to the glass transition temperature of the polymer for a constant period, in order to prevent an action in which the twist returns to the original state.
  • the manufacturing method of the actuator according to the second embodiment of the present invention as described above is an example of a method for obtaining the actuator according to the first embodiment of the present invention, but the method for obtaining the actuator according to the first embodiment of the present invention is not limited thereto.
  • the temperature of the environment in the step of twisting the fiber is higher than the glass transition temperature of the fiber, and the glass transition temperature of the fiber is higher than 25° C. That is, the temperature of the environment in the step of twisting the fiber>the glass transition temperature of the fiber>25° C. is satisfied.
  • the manufacturing method of the actuator according to the second embodiment of the present invention is suitable for obtaining the actuator according to the first embodiment of the present invention, but in order to obtain the actuator according to the first embodiment of the present invention, a manufacturing method may be adopted in which the temperature of the environment in the step of twisting the fiber>25° C. >the glass transition temperature of the fiber is satisfied, or a manufacturing method may be adopted in which the glass transition temperature of the fiber>the temperature of the environment in the step of twisting the fiber>25° C. is satisfied.
  • a manufacturing method in which the temperature of the environment in the step of twisting the fiber>25° C.
  • the manufacturing method for obtaining the actuator according to the first embodiment of the present invention at the time of spinning and stretching the fiber, stretching may be performed while applying modification in the rotation direction based on the fiber axis.
  • the angle y is for the twist mark at the time of twisting a fiber which is manufactured by performing usual spinning and stretching under an environment of 25° C. by applying a tensile stress of a tensile elastic modulus of fiber which is manufactured by performing the usual spinning and stretching ⁇ 4.5 ⁇ 10 ⁇ 3 up to the limitation on which the coiling occurs or the limitation on which the breakage occurs.
  • the actuator according to the first embodiment of the present invention may have other characteristics described below.
  • a polymer having a glass transition temperature (Tg) of higher than 25° C. is preferable as the type of polymer which configures the actuator according to the second embodiment of the present invention, from the viewpoint of enabling the manufacturing method of the actuator according to the second embodiment of the present invention described above to be adopted.
  • the glass transition temperature (Tg) of the polymer may be higher than 45° C.
  • examples of the type of polymer include nylon such as nylon 6 (Tg: 45° C.) and nylon 6,6 (Tg: 47° C.), an acrylic resin such as polymethyl methacrylate (Tg: 100° C.), a polyester resin such as polyethylene terephthalate (Tg: 80° C.), polycarbonate (Tg: 145° C.), polyvinyl chloride (Tg: 82° C.), polycarbonate (Tg: 150° C.), and the like.
  • examples of the type of polymer having a glass transition temperature (Tg) of lower than 25° C. include polyethylene (Tg: ⁇ 120° C.), polypropylene (Tg: ⁇ 20° C.), and the like.
  • the polymer configuring the fibrous polymer material has crystallinity.
  • the degree of crystallinity of the polymer in the fibrous polymer material is preferably greater than or equal to 50%, and is more preferably 55% to 90%. By setting the degree of crystallinity to be in such a range, a polymer having high anisotropy and an excellent effect as an actuator is easily obtained.
  • the actuator according to the first embodiment of the present invention is a monofilament fiber to which a twist is added.
  • the fibrous polymer material configuring the actuator according to the first embodiment of the present invention may be a coil-like fiber obtained by winding the monofilament fiber to which the twist is added around a mandrel, and at this time, the coil-like fiber may be obtained by winding the monofilament fiber in the same direction as that of the direction of the twist which is initially added, or the coil-like fiber may be obtained by winding the monofilament fiber in the opposite direction to the direction of the twist which is initially added.
  • the coil-like fiber wound in the same direction as that of the direction of the twist which is initially added can function as an actuator which contracts by heating.
  • the coil-like fiber wound in the opposite direction to the direction of the twist which is initially added can function as an actuator which extends by heating.
  • an extending action is set not to flee to a horizontal direction by applying a core rod to the inside of the coil.
  • the fibrous polymer material configuring the actuator according to the first embodiment of the present invention may be formed of a multifilament fiber.
  • An actuator is observed by using an optical microscope, and the angle of a linear twist mark with respect to a fiber axis is measured.
  • the angle of the twist mark is obtained by setting a direction parallel to a fiber axis direction to 0° and a vertical direction to the fiber axis to 90°, and by determining an inclination angle of the twist mark with respect to the twist mark which is observed in the vicinity of the center portion in a fiber diameter direction from the fiber axis direction.
  • An actuator sample having a length of 12 cm is sampled, a mark is applied to a position which is separated from one end (referred to as an end portion A) by 1 cm (a point B), 6 cm (a point C), and 11 cm (a point D), and an elongated stainless steel plate having a length of 30 mm, a width of 1.5 mm, a thickness of 0.5 mm, and a mass of 170 mg is attached to the position of the point B which is separated from the end portion A by 1 cm.
  • the stainless steel plate is bent in a position of 10 mm from the end of the stainless steel plate, the sample is interposed in the bent portion, and a force is applied by a nipper, and thus, the stainless steel plate is fixed to the actuator sample.
  • the stainless steel plate is attached to the sample to be in a direction perpendicular to the sample.
  • the stainless steel plate from the position of the point D which is separated from the end portion A by 11 cm to another end portion (a position which is separated from the end portion A by 12 cm) is fixed by a clamp, the stainless steel plate is lowered, the sample is applied into a water bath at a temperature of 25° C. such that the sample is dipped up to the mark of the point C while being parallel to the vertical direction, and then, is pulled up, and is slowly applied into a hot-water bath at a temperature of 80° C. such that the sample is dipped up to the mark of the point C.
  • a force is applied in the rotation direction based on the fiber axis from the actuator sample by heating, the stainless steel plate is rotated around the actuator sample, and then, a difference between an angle at which the movement of the stainless steel plate stops and an angle at the time of dipping the sample in the water bath at 25° C. is observed as an angle in the movable range.
  • a set of rotation movements from that the sample is applied into the water bath at a temperature of 25° C. to that the sample is applied into the hot-water bath at a temperature of 80° C. is repeated five times, the average value of the angles in the movable range is set to a rotation angle of the actuator sample.
  • a thread formed of nylon 66 (manufactured by TORAY MONOFILAMENT CO., LTD., Tensile Elastic Modulus: 2.9 ⁇ 10 3 MPa, Glass Transition Temperature: 47° C., a diameter of 0.5 mm) was prepared.
  • the thread was cut to be 1 m in length, and a weight of 260 g was connected onto one end of the cut thread through an annular clasp.
  • the other end was connected to a motor.
  • the thread was stretched to extend in the direction of gravity by the weight, and a metal rod was passed through the annular clasp, and thus, one end of the thread to which the weight was connected was freely moved in the vertical direction, but not moved in the rotation direction.
  • a tensile stress which was applied to the thread was 12.98 MPa, and the tensile stress which was applied to the thread was 4.5 ⁇ 10 ⁇ 3 times a tensile elastic modulus of the thread.
  • a cylindrical heater (Product Name: MI Tube Heater manufactured by Misec Corporation) was disposed around the thread, the environment around the entire thread of 1 m was retained at 180° C., and the motor was operated at 400 rpm up to 580 rotations.
  • a bump was not generated on the thread while the thread was twisted. Both ends of the thread were fixed such that the twist did not return to the original state, and then, the thread was retained at 180° C.
  • the twisted thread was set to the actuator sample for measurement and evaluation.
  • the inclination angle of the twist mark with respect to the fiber axis was measured, and thus, the angle of the twist mark was 49.3°.
  • the movable range of the actuator due to heating was evaluated, and thus, the rotation angle was 315°.
  • An actuator sample was obtained by the same method as that in Example 1 except that the environment around the entire thread of 1 m was retained at 80° C., the motor was operated at 400 rpm up to 540 rotations, and both ends of the thread were fixed such that the twist did not return to the original state, and then, the thread was retained at 180° C. for 30 minutes under an environment where the humidity was not adjusted, and was subjected to the residual stress relaxation treatment, at the time of twisting the thread. Even in Example 2, a bump was not generated on the thread while the thread was twisted. The inclination angle of the twist mark with respect to the fiber axis was measured, and thus, the angle of the twist mark was 47.6°. The movable range of the actuator due to heating was evaluated, and thus, the rotation angle was 292°.
  • Example 2 A sample was obtained by the same method as that in Example 1 except that the temperature around the thread was not increased by the heater, but the thread was twisted up to 580 rotations under an environment of 25° C., at the time of twisting the thread.
  • the bump was generated on the thread while the thread was twisted, and thus, a portion not including the bump was set to the actuator sample.
  • the inclination angle of the twist mark with respect to the fiber axis was measured, and thus, the angle of the twist mark was 44.2°.
  • the movable range of the actuator due to heating was evaluated, and thus, the rotation angle was 270°.
  • An actuator sample was obtained by the same method as that in Example 1 except that the temperature around the thread was not increased by the heater, but the thread was twisted up to 500 rotations under an environment of 25° C., at the time of twisting the thread.
  • the bump was not generated on the thread while the thread was twisted.
  • the inclination angle of the twist mark with respect to the fiber axis was measured, and thus, the angle of the twist mark was 44.5°.
  • the movable range of the actuator due to heating was evaluated, and thus, the rotation angle was 270°.
  • An actuator sample was obtained by the same method as that in Example 1 except that the temperature around the thread was not increased by the heater, but the thread was twisted up to 375 rotations under an environment of 25° C., at the time of twisting the thread. Even in Comparative Example 3, the bump was not generated on the thread while the thread was twisted. The inclination angle of the twist mark with respect to the fiber axis was measured, and thus, the angle of the twist mark was 33.1°. The movable range of the actuator due to heating was evaluated, and thus, the rotation angle was 225°.
  • An actuator sample was obtained by the same method as that in Example 1 except that the temperature around the thread was not increased by the heater, but the thread was twisted up to 250 rotations under an environment of 25° C., at the time of twisting the thread. Even in Comparative Example 4, the bump was not generated on the thread while the thread was twisted. The inclination angle of the twist mark with respect to the fiber axis was measured, and thus, the angle of the twist mark was 20.0°. The movable range of the actuator due to heating was evaluated, and thus, the rotation angle was 160°.
  • An actuator sample was obtained by the same method as that in Example 1 except that the temperature around the thread was not increased by the heater, but the thread was twisted up to 125 rotations under an environment of 25° C., at the time of twisting the thread. Even in Comparative Example 5, the bump was not generated on the thread while the thread was twisted. The inclination angle of the twist mark with respect to the fiber axis was measured, and thus, the angle of the twist mark was 10.1°. The movable range of the actuator due to heating was evaluated, and thus, the rotation angle was 80°.
  • FIG. 2 the angle of the twist mark and the rotation angle of the actuator sample of each of Examples 1 and 2 and Comparative Examples 1 to 5 with respect to the number of twist rotations are illustrated as a graph.
  • the angle of the twist mark of 44.2° in Comparative Example 1 is yz
  • the angle of the twist mark of 44.5° in Comparative Example 2 is y 3
  • y 3 is within a range of y 2 ⁇ 0.5°. Therefore, the larger angle in both of the angles, that is y 3 of 44.5° is the angle y of the fiber of nylon 6,6 used in the examples and the comparative examples.
  • Example 1 even in a case where the thread was twisted over the glass transition temperature of nylon 66 of 47° C. up to 580 rotations under an environment of 180° C., the coiling did not occur, but the rotation angle of 315° represented the thermally large movable range.
  • Example 2 even in a case where nylon 66 was twisted up to 540 rotations under an environment of 80° C., the coiling did not occur, but the rotation angle of 292° represented the thermally large movable range.
  • a temperature at the time of performing a twist treatment, the number of rotations, the presence or absence of the bump, the angle x of the twist mark, the relationship between the angle x and the angle y, and the rotation angle (an actuator movable range) in each of the examples and the comparative examples are shown in Table 1.
  • the actuator according to the first embodiment of the present invention can be used for motorizing various products which require a large angle or the movement of a large distance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Materials For Medical Uses (AREA)
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JP2016252346 2016-12-27
PCT/JP2017/038691 WO2018123240A1 (ja) 2016-12-27 2017-10-26 アクチュエータ及びその製造方法

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CN113531949A (zh) * 2020-04-17 2021-10-22 南开大学 一种基于电热制冷材料的扭热制冷方法
CN114060279A (zh) * 2021-11-15 2022-02-18 中国科学院苏州纳米技术与纳米仿生研究所 耐高温仿生驱动器、其制备方法、制备系统及测试方法
US11299825B2 (en) * 2017-02-28 2022-04-12 Lintec Of America Manufacturing of artificial muscle actuators

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JP7137579B2 (ja) * 2017-11-21 2022-09-14 リンテック株式会社 アクチュエータ
TWI821387B (zh) * 2018-09-07 2023-11-11 日商琳得科股份有限公司 致動器
JP7480507B2 (ja) * 2018-09-10 2024-05-10 東レ株式会社 アクチュエータ用繊維、並びにそれを用いたアクチュエータおよび繊維製品

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JP6946344B2 (ja) 2021-10-06
CN110100096A (zh) 2019-08-06
WO2018123240A1 (ja) 2018-07-05
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KR102361097B1 (ko) 2022-02-09
CN110100096B (zh) 2020-10-16
EP3543525A1 (en) 2019-09-25

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