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A hybrid drive type shape memory alloy linear drive device

A technology of memory alloy and hybrid drive, which is applied in the direction of machines/engines, mechanisms for generating mechanical power, mechanical equipment, etc., can solve the problems of intelligent materials such as refractory periods, and achieve the effects of light weight, improved compactness, and high speed

Active Publication Date: 2016-07-06
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0004] The invention utilizes the advantages of light weight and large output stress of the shape memory alloy, so that the actuator has a higher power-to-weight ratio, and realizes precise step output. A group of SMA wires work in rotation, which greatly improves the operating frequency of the actuator

Method used

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  • A hybrid drive type shape memory alloy linear drive device
  • A hybrid drive type shape memory alloy linear drive device
  • A hybrid drive type shape memory alloy linear drive device

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 Shown is a schematic structural diagram of a hybrid drive shape memory alloy linear drive device provided by the present invention. The structure constituting the linear drive device includes two end caps and end block assemblies 2, two sleeves 3, two small end caps 7 and Figure 4 The frame formed by the connecting rod 16, spring washer 17 and nut 18 shown in the frame has a lead screw 1 passing through the center of the frame, and a cumulative displacement output assembly 6 is provided between two small end caps 7. The end cover and end block assembly 2 at both ends of the frame are provided with a piston and a conversion chuck device 5 to realize the work rotation of the SMA wire 4, and are distributed at corresponding positions between the cumulative displacement output assembly 6 and the piston and conversion chuck...

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Abstract

The invention provides a hybrid drive type shape memory alloy linear drive device, the drive device has a cumulative displacement output device, and also includes a frame, a piston and an output rotation device; the invention utilizes the advantages of light weight and large output stress of shape memory alloys, Make the actuator have a higher power-to-weight ratio, use the cumulative displacement output device to realize the precise step output of the long stroke, use the piston and the rotation device to solve the problem of the recovery refractory period of the smart material, and make multiple groups of SMA wires work in rotation, The operating frequency of the SMA actuator is greatly improved. Because the present invention adopts a novel copper-zinc composite welding scheme for joints, no mechanical connection method is used, the size of the mechanism is reduced, and the weight is reduced. The device directly supplies power to the SMA wire through the conversion chuck. The structure is simple, and the SMA wire responds quickly, so it has the characteristics of fast response. It has the characteristics of high power-to-weight ratio.

Description

technical field [0001] The invention relates to the technical field of novel functional material actuation, in particular to a hybrid-driven shape memory alloy linear actuator (Hybrid Linear Actuator Based on Shape Memory Alloy). Background technique [0002] Alloy materials with shape memory effect are emerging functional materials developed in the middle of the 20th century. There are mainly three types: Ti-Ni base, copper base and iron base. After plastic deformation, these alloys can recover the deformation when heated to the phase transition temperature. previous shape. Among them, Ti-Ni alloy is the most stable and widely used shape memory alloy, and it is also the earliest shape memory alloy to enter the stage of industrial application. The shape memory alloy has a recovery strain as high as 4-6% and a recovery stress as high as 200 MPa under temperature driving. Utilizing the shape memory effect of Ti-Ni alloy, various actuators can be made, and its power-to-weight...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03G7/06
Inventor 董二宝张晓光王支荣胡锦洪许旻杨杰
Owner UNIV OF SCI & TECH OF CHINA
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