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Shape memory alloy reciprocating type displacement multiply output mechanism

A memory alloy, reciprocating technology, applied in the direction of mechanical power generating mechanism, mechanical equipment, machine/engine, etc., can solve the problem of small return displacement, and achieve the effect of low cost, good reliability and simple installation

Active Publication Date: 2009-04-15
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the temperature change process, the recovery displacement of the shape memory alloy is up to 8%, but under this maximum recovery strain condition, it can only be maintained for a few to dozens of cycles before it fails. Good repeatability and long cycle life, set its recovery displacement to 1-5%, so that the cycle life can reach 10 5 ~10 6 However, such recovery displacement is very small. For example, a memory alloy wire with a length of 10 cm can only produce a recovery displacement of 1 to 5 mm. Such a small recovery displacement becomes the biggest obstacle to the wide application of shape memory alloys as displacement output mechanisms.

Method used

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  • Shape memory alloy reciprocating type displacement multiply output mechanism

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Embodiment 1

[0022] like figure 1 As shown, it is one of the embodiments of the present invention: a schematic structural diagram of a linear reciprocating displacement multiplying output mechanism. 11 is a small spring; 12 is a movable slider with teeth; 13 is a T-shaped pull rod; 14 is a thick plate with teeth; 15 is a sleeve; 16 is a titanium-nickel shape memory alloy wire; 17 is a spring; 18 is a belt Threaded tie rod; 19 is a horizontal plate. The toothed thick plate 14 is provided with teeth on the inner wall, and the toothed movable slider 12 has the same teeth as the toothed thick plate 14 . The T-shaped tie rod 13 and the horizontal plate 19 are each provided with two small holes. The four small springs 11 are respectively placed in the small holes of the T-shaped pull rod 13 and the horizontal plate 19. One end of the toothed movable slider 12 is connected to the small springs, and the other end is connected to the toothed inner wall of the toothed thick plate 14. The teeth ar...

Embodiment 2

[0028] like figure 2 As shown, it is the second embodiment of the present invention, a schematic structural diagram of a circumferential reciprocating displacement multiplying output mechanism. 21 is a ratchet wheel; 22 is a pawl; 23 is a pawl; 24 is a small spring; 25 is an upper end surface; 26 is a titanium-nickel shape memory alloy wire; 27 is a spring; The pawl 22 and the pawl 23 are axially connected with the upper end plate, the lower part of the pawl 22 and the pawl 23 are connected by a small spring 24, the ratchet 21 is engaged with the upper part of the pawl 22 and the pawl 23; the upper end plate 25 and the lower end plate 28 The two ends of the two shape memory alloy wires 26 are connected to the upper end plate 25 and the lower end plate 28 respectively, and the lower end plate 28 is fixed.

[0029] The working process of the circumferential reciprocating displacement multiplying output mechanism of the present invention is as follows:

[0030] (1) Design each...

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Abstract

The invention relates to a reciprocating displacement multiplication output mechanism compromising two ways, reciprocating linear displacement multiplication output and reciprocating circular displacement multiplication output. The displacement amplification purpose is realized by taking advantages of the excellent memory character of shape memory alloy and long recycling service life to output the displacement multiplication of 1-5 percent of the shape memory alloy length. The mechanism takes advantage of temperature change controlling displacement output, is not affected by surrounding environment medium and atmosphere and has the advantages of easy installment, miniaturization in structure available, long recycling service life, good reliability and low cost, etc, and can be broadly used as a driver and an executive complement for displacement output in mechanical, automatic and electronic industries, etc.

Description

technical field [0001] The invention relates to a displacement output mechanism, which includes linear displacement output and circumferential displacement output, in particular to a multiplication output mechanism for realizing linear displacement and circumferential displacement by utilizing the shape memory effect of shape memory alloy in the process of temperature change . Background technique [0002] Shape memory alloy is an alloy with memory effect. Shape memory effect refers to a special property that an alloy with a certain initial shape can be restored to its original shape by heating to a certain critical temperature after being deformed at a low temperature. After the shape memory alloy wire is stretched and deformed at a low temperature, and then heated, it will recover its shape, generate a recovery force and a recovery displacement, and use its recovery force and recovery displacement to perform external work. Various drive elements and actuators have been wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03G7/06
Inventor 米绪军栗华矗刘宏伟李艳锋尹向前
Owner GRIMAT ENG INST CO LTD