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Flexible microgripper through topological optimization
InactiveCN101717063ALarge output displacementNovel structure typeMicromanipulatorPiezoelectric/electrostriction/magnetostriction machinesShaped beamMicro-operation
The invention relates to a flexible microgripper through topological optimization, which belongs to a microactuators in the technical field of the micro electro mechanical systems and is a flexible electrothermally driven microgripper. The flexible microgripper consists of a shift amplifying section and a driving section and is an integral structure with the eudipleural gripper body. The shift amplifying section M is designed by using the topological optimization method and comprises left and right triangular components and a flexible rod, wherein the left and right triangular components randomly hollow triangle structures. The driving section comprises a V-shaped beam array, left and right driving fixed rods and left and right electrodes. The microgripper has the advantages of unique and novel structure, large output shift, rapid response, simple control, convenient integration and is effective and energy-saving without applying drive in the process of gripping objects, thereby the microgripper is quite suitable for gripping minute objects for micro-assembly, micro-operation and the like.
Owner:DALIAN UNIV OF TECH
XYtheta three-degree-of-freedom large-stroke and high-frequency response precision positioning platform
InactiveCN106847346AIncrease the magnificationLarge output displacementInstrumental componentsSteel platesHigh bandwidth
The invention discloses an XYtheta three-degree-of-freedom large-stroke and high-frequency response precision positioning platform, which comprises a rigid base, wherein the inner side of the rigid base is connected with fixed ends at the outer sides of four double-layer diamond displacement amplification mechanisms separately; first rigid output ends at the inner sides of the four double-layer diamond displacement amplification mechanisms are connected with a flexible branch chain mechanism; a second rigid output end of the flexible branch chain mechanism is connected with a mobile platform; the center of the mobile platform is in rigid connection with a driven object through a threaded hole; the mobile platform, the flexible branch chain mechanism and the double-layer diamond displacement amplification mechanisms are rotationally symmetrical about the threaded hole; the first rigid output ends at the inner sides of the diamond displacement amplification mechanisms are connected with the rigid base through a rectangular beam; first rigid input ends of two sides of the diamond displacement amplification mechanisms are connected with piezoelectric ceramic; and the whole mechanism is formed by integrated processing of a steel plate through an electro-discharge machining process, a hollow cavity in the mechanism is processed to be transparent and an internal member of the hollow cavity is in a suspended state. Large-stroke and high-bandwidth high-precision displacement output can be achieved and the structure is simple and compact.
Owner:XI AN JIAOTONG UNIV
Lever amplification-based double-foot driven non-resonant piezoelectric linear motor
ActiveCN105932900ANot easy to interfereLarge output displacementPiezoelectric/electrostriction/magnetostriction machinesLinear motionEngineering
The invention discloses a lever amplification-based double-foot driven non-resonant piezoelectric linear motor, which comprises a stator assembly, a linear guide rail, a pre-loading device, a stator fixing plate and a bottom plate, wherein the stator assembly is fixedly connected to the stator fixing plate; a rotor guide rail is arranged at the front end of the stator assembly and the rear end of the stator assembly is connected with the pre-loading device; a pre-loaded spring is arranged in the pre-loading device; the front end of the stator assembly and the rotor guide rail are kept in contact under the action of the pressure generated by deformation of the pre-loaded spring; the rotor guide rail, the pre-loading device and the pre-loaded spring all are arranged on a base; and the stator assembly comprises stator structure bodies, laminated piezoelectric ceramic, a cushion block and pre-loaded bolts. The motor disclosed by the invention is simple in structure, small in size and convenient to install. Certain electric signals are applied to four groups of laminated piezoelectric ceramic respectively, so that linear motion of the piezoelectric motor can be achieved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Symmetrical double-feet driving offresonance piezoelectric linear motor
InactiveCN105071686AEnsure consistencyImprove contact statusPiezoelectric/electrostriction/magnetostriction machinesEngineeringLinear motor
The invention discloses a symmetrical double-feet driving offresonance piezoelectric linear motor, comprising a stator, a casing of the stator, a mover guide rail, guiding adjusting mechanisms, a precompression apparatus and a base. The stator is fixedly connected in the casing to form an integrity; the front end of the casing is provided with the mover guide rail, the rear end is in connection with the precompression apparatus, and left and right ends are respectively in connection with the guiding adjusting mechanisms; the precompression apparatus is internally provided with a precompression spring; under the restoring force effect generated by the deformation of the precompression spring, the front end of the casing keeps contact with the mover guide rail; the mover guide rail, the precompression apparatus, and the guiding adjusting mechanisms are all arranged on the base; the stator is composed of a stator supporting board, and two symmetrical driving feet, lamination electroceramics, cushion blocks, long hinges, and pre-tightening screws. The symmetrical motor has a structure simple, is convenient to install, and effectively guarantees the bidirectional actuation performance consistency of a piezoelectric motor; certain electric signals are respectively applied to four sets of lamination electroceramics to realize the bidirectional rectilinear motion of the piezoelectric motor.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Precise micro motion platform based on shape memory material coarse motion driver
The invention discloses a precise micro motion platform based on a shape memory material coarse motion driver, belonging to a micro motion platform technology. A Y-directional coarse motion platform base, an X-directional coarse motion platform base, an X-directional coarse motion platform, an XY two-dimensional micro motion platform base, a Y-directional micro motion platform and an objective table are mounted on a base from bottom to top; the Y-directional micro motion platform is mounted in the X-directional micro motion platform through a Y-directional micro motion flexible articulated mechanism; the X-directional micro motion platform is mounted in the XY two-dimensional micro motion platform base through an X-directional micro motion flexible articulated mechanism and is driven by an X-directional piezoelectric micro motion driver and a Y-directional piezoelectric micro motion driver; and the X-directional coarse motion platform is matched with the X-directional coarse motion platform base through an X-directional coarse motion slide way and is driven by an X-directional shape memory material coarse motion driver and a Y-directional shape memory material coarse motion driver. The precise micro motion platform is simple and compact in structure, high in positioning precision and wide in application prospect and is easy to control.
Owner:HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Stepping peristalsis type driving and exciting method based on multi-piezoelectric-vibrator bending movement
ActiveCN105450081APrecise positioningImplement stepper drivePiezoelectric/electrostriction/magnetostriction machinesElectricityPeristalsis
The invention discloses a stepping peristalsis type driving and exciting method based on multi-piezoelectric-vibrator bending movement, and relates to the field of electric precise driving. The problems that an existing piezoelectric driving technology can hardly achieve positioning and strokes at the same time, and applied signals and output displacement are limited when a piezoelectric stack device works in an axial telescopic mode are solved. An amplitude-change pole is arranged at the tail end of each piezoelectric vibrator, a drive foot is arranged at the tail end of each amplitude-change pole, and a horizontal bent ceramic set and a vertical bent ceramic set are arranged at the head end of each piezoelectric vibrator; the head ends of the n piezoelectric vibrators are all fixedly connected with a base, the side faces of the drive feet all make contact with a rotor, and the vertical bent ceramic sets apply DC exciting signals to generate bending in the vertical direction; the horizontal bent ceramic sets apply DC exciting signals to generate bending in the horizontal direction, and when the drive feet make contact with the rotor, the drive feet can drive the rotor to do the horizontal movement through friction force; it is ensured that one drive foot keeps making contact with the rotor. The method is used for piezoelectric precise driving.
Owner:HARBIN INST OF TECH
A sticky-slip inertial linear actuator based on surface inclination friction control
ActiveCN109150002ALarge output displacementHigh outputPiezoelectric/electrostriction/magnetostriction machinesFlexure hingesLinear actuator
The invention relates to a sticky-slip inertial linear actuator controlled by surface inclination friction, which relates to an actuator, comprising a flexure hinge amplifying mechanism, a piezoelectric stack actuator 1, a guide rail, a base and a mover; The flexure hinge amplifying mechanism is fixed on the base, the piezoelectric stack actuator 1 is installed in the flexure hinge amplifying mechanism, the piezoelectric stack actuator 1 is pre-tightened by a pre-tightened connector which is screwed on the flexure hinge amplifying mechanism, and the guide rail is a hollow structure which is closed at both ends; The guide rail is internally machined with a triangular amplifying mechanism in which a piezoelectric stack actuator (2) capable of adjusting the inclination angle of the guide railis mounted, a mover is arranged on the guide rail, and a friction material layer with self-lubricating characteristics in contact with the guide rail is fixedly connected on the surface of the mover.The invention has the advantages of large output force and displacement, compact structure, stable operation and bi-directional operation with load, and has wide application prospect.
Owner:NINGBO UNIV
Horizontal and vertical multi-dimensional vibration isolation and energy consumption system of prefabricated assembling type cantilever framework
ActiveCN105756214ALarge outputLarge output displacementBridge structural detailsShock proofingVertical vibrationMulti dimensional
The invention provides a horizontal and vertical multi-dimensional vibration isolation and energy consumption system of a prefabricated assembling type cantilever framework. The system is mounted between an upper structure and a lower structure, and a gap for allowing the system to vibrate vertically is formed; the system comprises a horizontal vibration isolation subsystem and a vertical vibration isolation subsystem; the horizontal vibration isolation subsystem is located above the vertical vibration isolation subsystem and is composed of a horizontal slide support and SMA spring limiting devices; the SMA spring limiting devices are uniformly distributed in the radial direction and are connected with the horizontal slide support in parallel to work; the vertical vibration isolation subsystem is composed of a plurality of single-truss cantilever frameworks; the horizontal plane of each single-truss cantilever framework is internally connected with SMA rods which are distributed in an X shape. The horizontal vibration isolation subsystem and the vertical vibration isolation subsystem are coupled through a slide block of the horizontal slide support to form a multi-dimensional vibration isolation mechanism. The system can be used for effectively absorbing three-dimensional seismic oscillation, and is high in damping capability and reliable in performance, and can be automatically reset.
Owner:BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
X, Y and theta plane three-freedom-degree precision positioning platform
ActiveCN106195556ARaise the natural frequencyHigh output stiffnessStands/trestlesBridge typeFixed frame
The invention discloses an X, Y and theta plane three-freedom-degree precision positioning platform. The X, Y and theta plane three-freedom-degree precision positioning platform comprises piezoelectric ceramic, composite rhombus displacement amplification mechanisms, bridge type displacement amplification mechanisms, a motion platform and a fixing frame. The piezoelectric ceramic is installed in the composite rhombus displacement amplification mechanisms, and the four composite rhombus displacement amplification mechanisms are arranged in parallel and located at the four corners of the fixing frame; and the motion platform is located at the center of the fixing frame, and the two side faces of the motion platform are connected with the composite rhombus displacement amplification mechanisms located on the two sides of the motion platform through the two bridge type displacement amplification mechanisms. Through the combination of the four composite rhombus displacement amplification mechanisms and the two bridge type displacement amplification mechanisms, the X, Y and theta plane three-freedom-degree precision positioning platform has two transverse motion freedom degrees and one rotation freedom degree; and through combination of two-stage displacement amplification and different drives, three-plane-freedom-degree motion is achieved, the structure of the platform is simple and compact, and the output displacement is large.
Owner:GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
Automatic impedance matcher for magnetostrictive transducer
PendingCN110646673AImprove matching accuracyWide range of matchingResistance/reactance/impedenceMechanical vibrations separationCapacitanceImpedance matching
The invention provides an automatic impedance matcher for a magnetostrictive transducer. The automatic impedance matcher comprises an impedance matching module, a signal collection module, a feedbackmodule, and a single-chip microcomputer control module; the impedance matching module comprises two sets of 8-channel 5V relay modules with optocoupler isolation functions, a 5V DC power supply, 16 CBB matching capacitors and 16 resistors with resistance of 1kohm; the two sets of relay modules have the same structure and respectively comprise 8 relays connected in parallel; DC + and DC- Ports of each set of relay modules are connected to a positive electrode c and a negative electrode d of the 5V DC power supply respectively; and an assorted H jumper cap is respectively inserted into each of high and low level trigger selection ends S1 to S16 of each relay. The automatic impedance matcher provided by the invention enables the transducer to continuously and stably work in a resonant state under different environments, working conditions and loads, thereby significantly improving the working efficiency of the transducer.
Owner:HEBEI UNIV OF TECH
Lever amplification based alternative stepping piezoelectric linear motor
InactiveCN105743387ANot easy to interfereLarge output displacementPiezoelectric/electrostriction/magnetostriction machinesMagnetic circuit stationary partsElectricityLinear motor
The invention discloses a lever amplification based alternative stepping piezoelectric linear motor. Lamination piezoelectric ceramic is taken as a main driving component, the position of the lamination piezoelectric ceramic on a stator combination body is reasonably arranged, the displacement of the lamination piezoelectric ceramic is amplified and output by a lever mechanism and a hinge mechanism, so that the piezoelectric linear motor can output relatively high linear speed and a push force, theoretically has equal bidirectional output performance, can generate relatively large travel, and is high in accuracy and high in stability. By the lever amplification based alternative stepping piezoelectric linear motor, the problems of relatively low motor output stability caused by relatively small displacement of the lamination piezoelectric ceramic and a processing error in the prior art are solved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Flexible and bendable shape-memory alloy actuator
InactiveCN105114270AReduce volumeReduce shockMachines/enginesMechanical power devicesAlloyMaterials science
The invention relates to a flexible and bendable shape-memory alloy actuator. A shape-memory alloy wire is taken as an actuation element, is retracted when electrified and heated and is elongated when cooled, so that displacement of the actuator and output of force are realized. The actuator comprises a drive end, a flexible solenoid and a fixed end, wherein the shape-memory alloy wire is arranged in the bendable solenoid, one end of the shape-memory alloy wire is in rigid connection with an output shaft, and the other end of the shape-memory alloy wire is connected with a fixed end cap; a bias spring is arranged in the drive end and can assist the shape-memory alloy wire in elongation in the cooling process. The actuator is small in size, light in weight and simple and reliable in structure, can bend according to certain curvature and can be easily mounted and integrated with an external mechanism, and the output force and the displacement are adjustable.
Owner:JILIN UNIV
Ammunition with head capable of deflecting and based on smart material driver
ActiveCN103105103ALarge output displacementLarge deflection angleAmmunition projectilesSelf-propelled projectilesSmart materialDeflection angle
Disclosed is ammunition with a head capable of deflecting and based on a smart material driver. The ammunition with the head capable of deflecting and based on the smart material driver comprises an ammunition head, an ammunition body, a smart material driver and a positioning system. The main body part of the ammunition is connected with a spherical protrusion of the surface on the upper end of the ammunition body through a spherical groove at the bottom of the ammunition head; four guide grooves are formed at the bottom of the ammunition head, wherein the guide grooves penetrate through the center of the circle of the ammunition head and are communicated with the spherical groove; sealing pins, springs and rolling balls are placed in the guide grooves to fasten connecting portions; under the impact of certain electrical signals, the smart material driver is deformed through information fed back by the positioning system to put the ammunition head to deflect, and therefore changing of motion locus of the ammunition is achieved. The ammunition with the head capable of deflecting and based on the smart material driver is large in deflection angle and is finally wide in attack ranges, reduces consumption of smart materials, saves space capable of placing a microprocessor and a small-size power supply, is compact in the whole structure, and therefore achieves microminiaturization, high accuracy and low energy consumption of independent and self-adaptation attack ammunition.
Owner:HARBIN INST OF TECH
Shape memory alloy thermal machine driving device
InactiveCN107725290ASimple mechanical structureLarge output displacementMachines/enginesMechanical power devicesMachine controlControl system
The invention discloses a shape memory alloy thermal machine driving device and belongs to the technical field of electromechanical equipment. The shape memory alloy thermal machine driving device comprises shape memory alloy thermal machines mounted on a base plate. The shape memory alloy thermal machines are connected with belt transmission mechanisms through movable pulley mechanisms; the belttransmission mechanisms are connected with spindles through one-way bearings, and the other ends of the spindles are connected with vertical bearing seats; and the shape memory alloy thermal machinesare connected with a thermal machine control system. The shape memory alloy thermal machine driving device has the beneficial effects that the advantages of simple mechanical structure, large output displacement and the like are achieved; by additionally arranging the movable pulley mechanisms, the output displacement of shape memory alloy springs is enlarged by nearly two times, and by additionally arranging the belt transmission mechanisms, driving performance can be improved easily; and a new design scheme is provided for a shape memory alloy thermal machine driver.
Owner:DALIAN UNIV
Giant magnetostrictive material-based rocking head type micromotor
ActiveCN105162354ACompact structureSimple structurePiezoelectric/electrostriction/magnetostriction machinesElectric machineMagnetization
The invention provides a giant magnetostrictive material-based rocking head type micromotor, which comprises a stator, a rotor and a precompression system, wherein the stator comprises a magnetic deformation body and a metal base body; a magnetostrictor body extends along the magnetization direction under the action of the applied magnetic field; two first-order bending vibration modes with a certain included angle in space are excited on the stator; the motion track of a mass point on a contact drive end surface of the stator and the rotor is an ellipse; the rotor runs through the hollow stator and is pressed on a drive end of the stator under the action of the precompression system; and the stator drives the rotor to rotate through friction. According to the giant magnetostrictive material-based rocking head type micromotor, wireless driving is achieved by external magnetic field excitation; microminiaturization is easy to achieve; and a piezoelectric material body is used for monitoring the running state of the motor in real time, and can also be used as a magnetoelectric conversion unit for achieving wireless energy supply and the like. The giant magnetostrictive material-based rocking head type micromotor is especially suitable for the occasions, such as the fields of medical diagnosis, robots and the like, which require accurate positioning.
Owner:SHANGHAI JIAO TONG UNIV
Device for reducing rotor wing vibration
The invention provides a device for reducing rotor wing vibration and relates to the field of aviation. The problem that the performance of a mechanism is greatly reduced due to the fact that the drive displacement of existing drivers used for driving a rotor wing trailing edge little wing is small, and the restoring force needs to be provided by a spring is solved. Five piezoelectric stack ceramics are installed between the inner walls of the short edges of a spring steel oval amplification mechanism and are connected through two wedge-shaped pre-tightening blocks. The spring steel oval amplification mechanism is used for amplifying the drive displacement produced by the piezoelectric stack ceramics. The amplification multiple alpha of the spring steel oval amplification mechanism is related to the wall thickness l of the spring steel oval amplification mechanism and the angle theta formed by arc edges. After applying voltage, a piezoelectric driver shrinks to the left side so as to produce the drive displacement, drives a trailing edge little wing connecting rod to move and then drives a trailing edge little wing to deflect around a little wing connection piece. The device is used for reducing rotor wing vibration.
Owner:HARBIN INST OF TECH
Large-displacement high-frequency-response three-degree-of-freedom piezoelectric driving precise locating platform
ActiveCN106229012AHigh output stiffnessRaise the natural frequencyInstrumental componentsHigh bandwidthThree degrees of freedom
Disclosed is a large-displacement high-frequency-response three-degree-of-freedom piezoelectric driving precise locating platform. The locating platform comprises a rigid base. The two sides of the rigid base are connected with one first rigid output end of a rhombus displacement amplifying mechanism. The other first rigid output end of the rhombus displacement amplifying mechanism is connected with one second rigid input end of a bridge-shaped displacement amplifying mechanism. Piezoelectric ceramics are connected to two first rigid input ends of the rhombus displacement amplifying mechanism. The rhombus displacement amplifying mechanism forms a flexible mechanism based on the triangulation principle through connection of a flexible arm, the two first rigid input ends and the two first rigid output ends. The bridge-shaped displacement amplifying mechanism is an arch-bridge-shaped flexible mechanism composed of two flexible beams, two second rigid input ends and a first second rigid output end. The two symmetrical flexible beams form bevel edges of the bridge-shaped displacement amplifying mechanism. Through the locating platform, large-stroke high-bandwidth high-precision displacement output can be achieved, and the structure is simple and compact.
Owner:XI AN JIAOTONG UNIV
Active vibration control system and method of flexible structure based on voice coil motor
ActiveCN104074904AGet the most out of performanceAchieving Active Vibration ControlShock absorbersControl systemEngineering
The invention discloses an active vibration control system of a flexible structure based on a voice coil motor and a method thereof, wherein the system comprises a main support rod fixed on the ground, a rail is fixed on the main support rod, left and right oblique rods on both sides of the rail are symmetrically fixed to the main support rod, left and right large displacement actuators adjacent to the left and right oblique rods are fixed on both sides of the main support rod when the rail is as a symmetry axis, both sides of the other end of the rail are symmetrically fixed with stationary fixtures on which fixed pulleys are mounted, and the top of the rail is provided with the flexible structure; the other ends of the left and right oblique rods are connected with positioning fixtures on which hole bolts are mounted, the fixed pulleys, the hole positions of the hole bolts and the left and right oblique rods are located on the same plane, and a rigid rope passes through the left large displacement actuator, the fixed pulleys and the holes of the hole bolts; besides, the invention further discloses a control method of the system; the active vibration control system outputs large displacement and greater control force through the voice coil motor, a control direction is shifted by the pulleys such that the active modal vibration control of the flexible structure can be realized.
Owner:XI AN JIAOTONG UNIV
Structure capable of improving output displacement and inherent frequency of piezoelectric flexible mechanism
InactiveCN106159079ARaise the natural frequencyThe natural frequency does not decreasePiezoelectric/electrostrictive devicesFlexible MechanismsElectricity
The invention discloses a structure capable of improving output displacement and inherent frequency of a piezoelectric flexible mechanism. The structure comprises a rhombus-shaped flexible mechanism, a piezoelectric stack, piezoelectric sheets, a displacement sensor, a data acquisition system, a power amplifier and a controller, wherein the displacement sensor is arranged at a rigid output end and the plurality of piezoelectric sheets are fixedly arranged at the two ends of a flexible beam respectively; a signal output end of the displacement sensor is connected with a signal input end of the data acquisition system; the signal output end of the data acquisition system is connected with the signal input end of a controller; and signal output of the controller is amplified through the power amplifier and then is connected with a driving signal input end of the piezoelectric stack / piezoelectric sheets. An additional bending moment is generated through sticking the piezoelectric sheets so that the output displacement of the rhombus-shaped flexible mechanism is enlarged and the inherent frequency of the flexible mechanism is not reduced; and furthermore, the inherent frequency of the flexible mechanism is improved through designing relatively thick flexible beam and flexible hinge, and a lost displacement amplification ratio is compensated by the bending moment provided by the additional piezoelectric sheets.
Owner:GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
Magnetostriction type jiggle clamp
InactiveCN101570310AImprove performanceSimple and good working environmentPiezoelectric/electrostriction/magnetostriction machinesSnap-action arrangementsCantileverOrthodontics
The invention relates to a magnetostriction type jiggle clamp, which comprises an upper jaw (1) and a lower jaw (2). The front ends of the upper jaw and the lower jaw are provided with a clamp mouth (3); the jiggle clamp also comprises an upper cantilever (4), a lower cantilever (5), a connecting arm (6), an ultra-magnetostriction material bar (7) and a solenoid coil (8) used for providing a magnetic field for the ultra-magnetostriction material bar; the upper cantilever and the lower cantilever are connected through the connecting arm, the tail ends of the upper jaw and the lower jaw are connected with one end of the upper cantilever, and a flexible hinge for the lower jaw to rotate to the direction of the upper jaw is arranged between the lower jaw and the upper cantilever; the ultra-magnetostriction material bar is propped between the lower jaw and the lower cantilever; and the lower jaw, the upper cantilever, the lower cantilever and the connecting arm are made of magnetic conducting materials. The magnetostriction type jiggle clamp of the invention has the advantages of large clamping range, large clamping force, high response speed, and easy control for precision.
Owner:NANCHANG INST OF TECH
Herringbone double-driving foot linear ultrasonic motor
PendingCN107404253ASimple structureLarge output displacementPiezoelectric/electrostriction/magnetostriction machinesElastomerEngineering
The invention discloses a herringbone double-driving foot linear ultrasonic motor. The motor comprises a base stage, a stator, a rotor and a driving power source which is arranged outside the base stage; the stator and the rotor are arranged side by side; the rotor is slidably arranged on the base stage; the stator is composed of a herringbone elastic body and piezoelectric ceramic sheets; one side where the herringbone elastic body forms an included angle is the inner side of the herringbone elastic body, and one side opposite to the inner side is the outer side of the herringbone elastic body; the inner side surface of the herringbone elastic body faces the rotor; the inner side of one arm of the herringbone elastic body and the inner side of the other arm of the herringbone elastic body are both provided with one piezoelectric ceramic sheet; the two piezoelectric ceramic sheets are electrically connected with the corresponding output ends of the driving power source; a sliding mechanism is slidably installed on the base stage; the sliding direction of the sliding mechanism is perpendicular to the sliding direction of the rotor; the herringbone elastic body is mounted on the sliding mechanism; and the base stage is provided with an adjustment mechanism for adjusting the sliding mechanism to make the inner side of the herringbone elastic body to contact with the rotor. Compared with the prior art, the herringbone double-driving foot linear ultrasonic motor of the invention has the advantages of simple structure and large output force.
Owner:XIAMEN CITY UNIV XIAMEN RADIO & TV UNIV
Movable pulley mechanism for shape memory alloy heat engine
InactiveCN108087222ASimple mechanical structureLarge output displacementMachines/enginesMechanical power devicesBall bearingShape-memory alloy
Owner:DALIAN UNIV
Single-driving type pure rotating and micro-positioning platform
InactiveCN107068201ALarge output displacementEasy to controlInstrumental componentsElectricityEngineering
Owner:TIANJIN UNIV
Novel actuator with two-stage amplification mechanism and that provides axial magnetic field with bar
PendingCN110492782AUniform axial permanent magnetic fieldLarge output displacementPiezoelectric/electrostriction/magnetostriction machinesEngineeringActuator
The invention discloses a novel actuator provided with a two-stage amplification mechanism and that provides an axial magnetic field with bars. The novel actuator comprises a non-magnetic-conductive shell, a magnetic-conductive frame, a magnet exciting coil, a combined body, the two-stage micro-displacement amplification mechanism and an output rod. The magnet exciting coil is sleeved outside thecombined body and is placed in the magnetic conductive frame, and the magnetic conductive frame and the combined body form a closed magnetic circuit; the magnetic conductive frame is arranged in the non-magnetic conductive shell; one end of the combined body is connected with the magnetic conductive frame, the other end of the combined body is connected with the input end of the two-stage micro-displacement amplification mechanism; the combined body is used for transmitting displacement to the two-stage micro-displacement amplification mechanism, the fixed end of the two-stage micro-displacement amplification mechanism is connected to the magnetic conductive frame, the output end of the two-stage micro-displacement amplification mechanism is connected with the rear end of the output rod, and the front end of the output rod extends out of the non-magnetic shell; the two-stage micro-displacement amplification mechanism amplifies the displacement of the combined body and transmits theamplified displacement to the output rod; and the output rod is used for outputting the displacement. The output displacement of a driver is increased, and the size of the driver is reduced.
Owner:BAOTOU RES INST OF RARE EARTHS +1
Nested giant magnetostrictive actuator
ActiveCN106100436ALarge output displacementSimple structurePiezoelectric/electrostriction/magnetostriction machinesMagnetostrictive actuatorActuator
The invention belongs to a magnetostrictive field, and relates to a nested giant magnetostrictive actuator. The nested giant magnetostrictive actuator mainly comprises a magneto-resistance base, a lower magnetic conductive plate, a coil skeleton, a magnetostrictive sleeve, a magnetic conductive sleeve, a magneto-resistance sleeve, a lower magnetic conductive block, a magnetostrictive rod, an upper magnetic conductive block, a cylindrical magnet yoke, an upper magnetic conductive plate, a magneto-resistance shell, a magneto-resistance ladder transmission shaft, a pre-tightening cover and a disc spring. The nested giant magnetostrictive actuator has the advantages of reasonable structure, simple operation and the like, and the output displacement of the actuator can be increased by combining magnetostrictive materials in different shapes and internal transmission structures of the actuator. The application occasions of the magnetostrictive actuator are widened, and the actuator has significance for practical application of the actuator.
Owner:SHENYANG POLYTECHNIC UNIV
Method for dynamic repairing of metal electrodes in IPMC driving process
ActiveCN108007950AImprove output performanceExtended service lifeResistance/reactance/impedenceElectrical testingIon exchangeIon
The invention discloses a method for dynamic repairing of metal electrodes in an IPMC driving process, and is particularly illustrated by an example of repairing of a platinum type IPMC metal electrode. The metal type IPMC is prepared by a chemical plating method; copper ions are used as driving ions and dynamic repair ions; the migration of hydrated copper ions in a base membrane is used for providing an output force for the IPMC, and at the same time, a continuous reduction reaction of the copper ions in an alternating electric field is used for self repairing of a metal layer of a platinumelectrode. A technological process comprises the steps: (1) preparation of a traditional metal electrode type IPMC; (2) preparation of a dynamic repairing ionic liquid; (3) a dynamic repairing ion exchange process; (4) a metal electrode dynamic repairing process; and (5) preservation of a sample. In the premise without increasing the cost, the electrical conductivity and output performance of theIPMC electrode are obviously improved. Experiments prove that the output performance of the IPMC after dynamic repairing is obviously improved, and the method is also suitable for electrode repairingfor a gold type IPMC, a palladium type IPMC and a silver type IPMC, and has great promotion value.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
SMA-spring-driven flywheel repeatable locking mechanism
ActiveCN111056050ALarge output displacementReduce distanceArtificial satellitesSpacecraft guiding apparatusFlywheelImpact resistance
The invention provides an SMA-spring-driven flywheel repeatable locking mechanism. The SMA-spring-driven flywheel repeatable locking mechanism comprises two sets of SMA-spring driving assemblies, twosets of lock column-wedge block units, a connecting rod, a sliding block and the like. An unlocking SMA wire-jacking spring is used for driving the locking process and the unlocking process, a triggering and locking SMA wire-unlocking keeping spring is used for controlling the unlocking state, a jacking spring simultaneously drives the left and right sets of lock column-wedge block units through the sliding block, the sliding block is connected with a wedge block through a connecting rod, and the wedge block is matched with the bottom surface of the lock column; in the locking process, the sliding block moves forwards to drive the wedge block to move outwards, and the lock column is pushed to move upwards to make contact with the flywheel. During releasing, the unlocking SMA wire is powered on and contracted, the sliding block moves backwards to drive the wedge block to move inwards, and the lock column moves downwards to be separated from the flywheel. And when locking is conducted again, the triggering and locking SMA wire is powered on, so that the triggering and locking SMA wire contracts and pulls out of the limiting block, limiting on the sliding block is relieved, and the mechanism can be locked again. Repeated locking can be achieved, synchronism is high, and vibration resistance and impact resistance are high.
Owner:BEIHANG UNIV
Super magnetostrictive actuator
InactiveCN110838802APrevent thermal deformationInhibit temperature rise and deformationPiezoelectric/electrostriction/magnetostriction machinesTemperature controlMagnetostrictive actuator
The invention discloses a super magnetostrictive actuator. The actuator comprises a shell and a base arranged at the bottom of the shell; a magnetic field generating device, a cooling device, a pre-tightening device and a positioning device are arranged in the shell 1; and the actuator also comprises a detection device used for carrying out performance detection on the super magnetostrictive actuator. According to the invention, a water cooling mechanism and a phase-change material are combined for carrying out temperature control, the water cooling mechanism is used for cooling the outer sideof a coil, and the phase-change material is used for cooling the inner side of the coil, so that the output precision of the giant magnetostrictive actuator is improved, and long-time stable work isguaranteed; the size is small, the weight is light, the output displacement is large, and the output force is large; the pre-pressure and the bias magnetic field are adjustable; the output displacement is big and output force linearity is good; the response speed is high, the control precision is high, and the eddy current groove can further improve the control precision of the output displacement; and meanwhile, a test system composed of a sensor, a signal amplification device and a computer is used for detecting the driving performance of a driver, so the test time is short, and the test efficiency and the test precision are high.
Owner:HUNAN UNIV OF SCI & ENG
Dynamically-combined helical driving device
InactiveCN101701619AOriginal installation space is smallPrecise positioningGearingOuter coreLinear drive
The invention relates to a dynamically-combined helical driving device. A supporting seat (8) is internally provided with a motor (9) which is axially provided with an engaged inner core (7); and the engaged inner core (7) is provided with a supporting helicoid (1) with a connecting helicoid (2) through a supporting helical guide wheel (3). Positioning teeth (11) are arranged at the upper edge and the lower edge of the supporting helicoid (1). The upper edge and the lower edge of the connecting helicoid (2) are provided with positioning holes (21). The connecting helicoid (2) is helically sleeved on the supporting helicoid (1) and the positioning holes (21) and the positioning teeth (11) are in butt joint and are fastened tightly. The connecting helicoid (2) is provided with an engaged outer core (5) which is connected with the engaged inner core (7) through a connecting rod (6). By the invention with the structure, screws with different heights can be formed by controlling the screwing turns; and the volumes of two helicoids can be substantially reduced, thereby providing an effective solution for meeting long-stroke heavy load linear drive.
Owner:NAT UNIV OF DEFENSE TECH
High-rise bidirectional constant-pressure water supply equipment
InactiveCN112627290AFirmly connectedEasy inspection and maintenanceService pipe systemsWater mainsPressure sensorVaristor
The invention provides high-rise bidirectional constant-pressure water supply equipment. The high-rise bidirectional constant-pressure water supply equipment comprises a pressure stabilizing box and a height adjuster. The bottom of the pressure stabilizing box extends into a through box, a water taking box is arranged at the bottom of the through box, and a left water outlet pipe and a right water outlet pipe are correspondingly arranged on the left side face and the right side face of the outer part of the pressure stabilizing box. A pressure sensor is fixed to the upper side face of the interior of the pressure stabilizing box, a piezoresistor is arranged in the pressure sensor, the lower part of the left side face of the piezoresistor makes contact with the top of the right side face of a left pressing plate, the bottom of the left side face of the left pressing plate is fixedly connected with the right end of a first cross arm, and the left end of the first cross arm is fixedly connected with the bottom of the right side surface of a left induction column. According to the technical scheme of the high-rise bidirectional constant-pressure water supply equipment, the technical problems that in the prior art, the bidirectional constant-pressure water supply capacity is not achieved, flexible height adjustment cannot be achieved, and water taking with filtering cannot be achieved are effectively solved, and application and popularization are facilitated.
Owner:张桂花
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