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Square telescopic shape memory alloy actuator for adding activation force

A technology of memory alloy and memory alloy wire, which is applied in the direction of mechanical power generating mechanisms, machines/engines, mechanical equipment, etc., can solve the problems of uncompact structure, limited working space, large structure, etc., and achieve simple and compact structure , increase the working power, save the effect of cooling or heating devices

Active Publication Date: 2011-04-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a square sleeve type shape memory alloy actuator with increased actuation force, so as to solve the problem that the cooling or heating device of the current shape memory alloy actuator is separated from the actuator and the structure occupies too much volume, The problem that the working space is limited due to the non-compact structure

Method used

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  • Square telescopic shape memory alloy actuator for adding activation force
  • Square telescopic shape memory alloy actuator for adding activation force
  • Square telescopic shape memory alloy actuator for adding activation force

Examples

Experimental program
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specific Embodiment approach 1

[0007] Specific implementation mode one: combine Figure 1-Figure 3 Describe this embodiment, the actuator in this embodiment includes the first end 1 of the outer cylinder, the first buffer spring 2, the first end 3 of the inner cylinder, the middle layer shape memory alloy wire 4, the square inner cylinder 5, Cover plate 6 of the second end of the inner cylinder, second end of the outer cylinder 8, second end of the inner cylinder 9, two semiconductor refrigeration chips 10, two layers of outer layer shape memory alloy wire 11, cylinder 12 and square outer cylinder 13 , the two ends of the square outer cylinder 13 are respectively equipped with the first end 1 of the outer cylinder and the second end 8 of the outer cylinder, the first end 3 of the inner cylinder, the second end cover plate 6 of the inner cylinder, the second end of the inner cylinder Head 9 and square inner cylinder 7 are located in square outer cylinder 13, the two ends of square inner cylinder 7 are equipp...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination image 3 To illustrate this embodiment, the actuator of this embodiment also includes a set of screws 7, the second end cover plate 6 of the inner cylinder and the second end 9 of the inner cylinder are detachably connected by a set of screws 7, and this structure is easy to disassemble. Other components and connections are the same as those in the first embodiment.

[0009] Working principle: firstly, the memory alloy wire is pretreated, such as Figure 4 The memory alloy wire is in a shrinking state at the austenite temperature, and when it is cooled to the martensite temperature, the memory alloy wire is elongated by applying tension. The memory alloy wire of the present invention is in when not working Figure 4 In the intermediate state at medium ambient temperature, the square inner cylinder 5 is located in the middle of the square outer cylinder 13 . When the action controller sends out a control signal to energize...

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Abstract

The invention discloses a square telescopic shape memory alloy actuator for adding activation force, relates to an actuator and aims at the problems that the structure has overlarge size because a cooling or heating device of the traditional shape memory alloy actuator is separated from the actuator and the work space is limited due to an incompact structure. A first end head of an outer cylinder and a second end head of the outer cylinder are respectively arranged at two ends of the square outer cylinder; a first end head of an inner cylinder and a second end head of the inner cylinder are respectively arranged at two ends of the square inner cylinder; a shaft memory alloy wire in an intermediate layer is arranged between b surfaces of two semiconductor refrigerating pieces; one end of each first shape memory alloy wire is fixedly connected to the second end head of the inner cylinder; the other end of each first shape memory alloy wire penetrates through the first end head of the inner cylinder and then is fixedly connected to the first end head of the outer cylinder; one end of each second shape memory alloy wire is fixedly connected to the first end head of the inner cylinder; and the other end of each second shape memory alloy wire sequentially penetrates through the second head of the inner cylinder and a cover plate at the second end head of the inner cylinder and then is fixedly connected to the second end head of the outer cylinder. The invention is used for outputting the linear displacement and force.

Description

technical field [0001] The invention relates to an actuator. Background technique [0002] Shape memory alloys have a shape memory effect. When the material is below the end temperature of martensite and undergoes a certain deformation under the action of external force, the heating temperature exceeds the phase transition temperature of the material, and the transformation from martensite to austenite will occur. When the material shrinks, it tries to return to the shape before deformation. If there are constraints at both ends of the material, a large restoring force will be generated inside the material. Shape memory alloys with two-way shape memory effect shrink repeatedly through heating and cooling. This feature can be used to make shape memory alloy actuators. At present, most of the shape memory alloy actuators use additional external cooling devices or heating devices. The structure is not compact, and it is not suitable for the environment with limited working sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03G7/06
Inventor 邓宗全郭宏伟赵浩江刘荣强
Owner HARBIN INST OF TECH