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Integrated displacement amplifying mechanism and moving method thereof

A displacement amplification mechanism and integrated technology, which is applied in the direction of machines/engines, mechanisms that generate mechanical power, mechanical equipment, etc., can solve the problems that the displacement is difficult to meet the requirements, the natural cooling speed is slow, and the response time of the mechanism is slow. High weight ratio, faster action speed, and simple appearance

Inactive Publication Date: 2016-10-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the shape memory alloy has the following disadvantages. The restoring force is closely related to the temperature. The temperature reached by heating needs to be guaranteed, and the natural cooling speed is slow, resulting in a slow response time of the mechanism.
The shape memory effect is most obvious when the shape memory alloy produces 2%-7% deformation, that is, it can completely restore the inherent shape before deformation. Meet the requirements

Method used

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  • Integrated displacement amplifying mechanism and moving method thereof
  • Integrated displacement amplifying mechanism and moving method thereof
  • Integrated displacement amplifying mechanism and moving method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The integrated displacement amplification mechanism driven by shape memory alloy provided by the present invention includes the base 6, the top seat 1 and the displacement system between the base 6 and top seat 1, and the displacement system includes a mechanical motion system and a shape memory alloy wire drive system;

[0040]The mechanical motion system is fixedly connected between the base and the top seat, adopts a scissor-type lifting displacement structure, and is provided with a displacement input end, which is connected to the shape memory alloy wire drive system; the mechanical motion system includes a bottom chute support Seat, top chute support, transverse shaft 2, scissor arm 3, horizontal movement shaft 8 and terminal 7 bottom chute supports are fixed on the base in pairs, and the bottom chute supports are connected with horizontal movement shafts 8. The top chute support and the bottom chute support are correspondingly arranged and fixed on the top seat 1,...

Embodiment 2

[0045] As a preferred embodiment of the present invention, a sleeve is set on the outside of the integrated displacement amplifying mechanism. The sleeve includes a sleeve box body and a baffle 17. The mechanical movement system and the shape memory are connected by the baffle 17 inside the sleeve. The alloy wire driving system is separated; on the top surface of the sleeve, the middle part is open, and end caps are arranged on both sides. The end caps are divided into two layers. The cover plate of the trachea 15; several base ventilation holes 16 are distributed on the base.

[0046] Figure 4 and Figure 5 The overall mechanism is installed and inserted into the sleeve, and a groove is opened in the middle of the sleeve to facilitate the operation of the amplification mechanism. Secondly, two U-shaped grooves are opened on the side of the baffle plate 17 to separate the mechanical motion system from the drive system by passing the SMA wire, and to close the drive system, ...

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Abstract

The invention discloses an integrated displacement amplifying mechanism and a moving method thereof. The mechanism uses pulleys to form a U-shaped wire winding mode; and the displacement amplifying mechanism uses a memory deformation effect of SMA wires for converting a horizontal motion to a vertical motion, and realizes the displacement amplification. The moving method realizes a double-travel motion, and increases effective length of shape memory alloy wires in limited mechanism space, so that the deformation is increased, and the mechanism space is saved; an optimized implementation mode can realize an excellent temperature control effect of the shape memory alloy wires through a closed box body; the quick heating of the shape memory alloy wires can be realized through feeding a lot of hot air in a ventilation pipe at the top end of the box body or feeding a certain current in a SMA; and the SMA wires can be quickly cooled by feeding in low-temperature cold air, so that the mechanism acting speed is accelerated.

Description

technical field [0001] The invention relates to the technical field of instrument driving components, in particular to an integrated displacement amplification mechanism driven by a shape memory alloy and a movement method thereof. Background technique [0002] The driving components of traditional mechanisms are mainly electromechanical drive, such as hydraulic drive, which has the advantages of long distance, high sensitivity and safety, and is suitable for large load requirements, but it has disadvantages such as high cost and easy oil leakage; motor drive, its advantages It has a large power-to-mass ratio, but the driving circuit is relatively complicated. With the research and development of new materials, new intelligent materials are constantly emerging. Among them, piezoelectric ceramic materials, magnetostrictive materials and shape memory alloys (SMA) are mainly suitable for driving components. Piezoelectric ceramic material as a driving element has low excitation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03G7/06
CPCF03G7/065
Inventor 徐志伟刘阳高媛
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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