CN216241126U

CN216241126U - SMA control mechanism

Info

Publication number: CN216241126U
Application number: CN202120979309.5U
Authority: CN
Inventors: 曹国庆
Original assignee: Zhen Guohua
Current assignee: Zhen Guohua
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2022-04-08
Anticipated expiration: 2031-05-08

Abstract

The utility model relates to an SMA control mechanism, which comprises: an SMA wire that is electrically contractible; the control body comprises a base and a driving piece, wherein the base is relatively fixed with the controlled body, and one end of an SMA wire and one control wire are fixed at the same time; the driving piece can move relative to the base and simultaneously fix the other end of the SMA wire and the other wire; the driving piece links to each other with the driven piece through contact or fixed, and high temperature phase transition shrink back when the circular telegram drives the driven piece, and the driving piece can save, and the other end and another wire snap-on of SMA wire are on the driven piece. The control machine of the utility model realizes simple structure, miniaturization and long service life, and can improve the use safety and reliability.

Description

SMA control mechanism

Technical Field

The utility model relates to the technical field of electric devices, in particular to an SMA control mechanism.

Background

The control device (activating device) is a common driving mechanism, and can be used for driving a manual operating mechanism to realize remote operation or automatic control. SMA refers to shape memory alloy (shape memory alloy) which is a kind of driving element in a control device. SMA is a material composed of two or more metal elements having a Shape Memory Effect (SME) by thermoelastic and martensitic transformation and inversion thereof. SMA can deform at a lower temperature, can contract and deform after being electrified and heated, and can recover to the shape before deformation after being cooled, thereby realizing electrically-controlled contraction.

The traditional driving mechanism is realized by a multipurpose micro motor, electromagnetism and the like, and cannot meet the requirements of longer and higher service life and miniaturization.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a miniaturized SMA control mechanism which is more reasonable, can improve the use safety and is more reliable.

The technical scheme of the utility model is as follows: the utility model provides a SMA control mechanism, its includes the SMA line and the control body, the control body includes base and driving piece, the base with by the control body relatively fixed, simultaneously the base is fixed the one end and the control line of SMA line, the relative base of driving piece rotationally sets up, simultaneously the other end and the wire of the fixed SMA line of driving piece, the driving piece links to each other with by the driving piece, the driving piece can drive by the driving piece motion.

Furthermore, one end of the driving part is provided with a convex body for driving the driven part.

Further, one end of the driving piece for fixing the SMA wire is connected with the wire by welding or riveting or crimping.

Further, the shape of the SMA wire is a straight line, a curved line or a spiral line.

Further, the driven member is a handle, a button or a button.

In conclusion, the beneficial effects of the utility model are as follows: the control machine of the utility model realizes simple structure, miniaturization and long service life, and can improve the use safety and reliability.

The present invention will be described in more detail below with reference to examples.

Drawings

FIG. 1 is a schematic structural diagram of an SMA control mechanism.

FIG. 2 is another structural schematic diagram of the SMA control mechanism.

Fig. 3 is a structural schematic diagram of a specific application of the SMA control mechanism.

Fig. 4 is a schematic diagram of another specific application of the SMA control mechanism.

Detailed Description

The utility model will be further described by way of example with reference to the accompanying fig. 1 to 4. The scope of the utility model is not limited thereto.

As shown in fig. 1 to 4, the SMA control mechanism includes an SMA wire 1 and a control body, the control body includes a base 3 and a driving member 4, one end 12 of the SMA wire 1 is fixed at a hole 31 of the base 3, while one end 12 of the SMA wire 1 is connected to one conductive wire 2, the other end 11 of the SMA wire 1 is fixed at a hole 43 of the driving member 4, while the other end 11 of the SMA wire 1 is connected to another conductive wire 22; the wires 2 and 22 can be a double-core wire or two independent wires and are used for supplying current to the SMA wire 1; the column 32 of the base 3 is used for fixing the base on the base fixed by the driving piece, the column 32 can be positioned in multiple points, or can be positioned in point and surface or surface and surface combination, one end of the SMA wire and one conducting wire are fixed at the position of the hole 31 of the base 3, the shaft 33 of the base 3 can be square, or can be in the shape of circle, triangle, polygon and the like, and the function of the shaft can play a role of a guide rail, so that the driving piece 4 can move towards the column 32 of the base 3 when the SMA wire 1 contracts; the hole 41 of the driving part 4 can move in the column 33 of the base 3, when the SMA wire contracts, the driving part moves towards the column 32, the column 42 of the driving part 4 drives the driven part, the shaft hole matching in the scheme can be exchanged, the hole is changed into a shaft, the shaft is changed into a hole, and the square column can also be a cylinder or an irregular column.

A second structure of the SMA control mechanism is shown in fig. 2, in which one end 12 of the SMA wire 1 is fixed to the hole 31 of the base 3, while one end 12 of the SMA wire 1 is connected to one of the conductive wires 2, the other end 11 of the SMA wire 1 is fixed to the hole 43 of the driving member 4, and meanwhile, the end 11 of the SMA wire 1 is connected to the other conductive wire of the conductive wire 2; the wires 2 and 22 can be a double-core wire or two independent wires for providing current for the SMA wire; the column 32 of the base 3 is used for fixing the base on a base fixed by the driving part, the column 32 of the base 3 can be positioned at multiple points, or can be positioned point-by-point or surface-by-surface, or the surface-by-surface combination, the shaft 33 of the base 3 can be square, or can be round, triangular, polygonal, etc., and the shaft 33 of the base 3 is matched with the hole 41 of the driving part 4 to ensure that the driving part 4 moves towards the column 32 of the base 3 when the SMA wire 1 contracts; the hole 41 of the driving part 4 is limited and movable up and down on the shaft 33 of the base 3, the driving part 4 is limited left and right on the base or the base, the driving part 4 is prevented from swinging randomly, the driving part can only move in the contracting direction of the SMA wire, when the SMA wire contracts, the driving part moves towards the column 32, the other end of the SMA wire and the other conducting wire are fixed at the position of the hole 43 of the driving part 4, meanwhile, the other end of the SMA wire is connected with the other conducting wire, the column 42 of the driving part 4 drives the driven part, the shaft hole in the scheme can be matched and exchanged, the hole is changed into a shaft, the shaft is changed into a hole, and the square column can also be a cylinder or an irregular column;

a typical application of the first configuration of the SMA control mechanism 1 is shown in fig. 3; the driven piece is an operation button 5 of the circuit breaker, a hole 51 of the driven piece 5 is concentric with the shaft 34 on the base 3, the driven piece 5 can rotate around the hole 51, the driving piece 4 drives a column 53 of the driven piece 5, the driven piece 5 rotates around the hole 51 when the SMA wire 1 contracts, a hole 52 on the driven piece correspondingly rotates around the hole 51, and the hole 51 drives the circuit breaker to be switched on and switched off through a connecting rod; the two SMA wires can respectively realize opening or closing, the shaft holes in the scheme can be matched and exchanged, the holes are changed into shafts, the shafts are changed into holes, and the square columns can also be cylinders or irregular columns;

the typical application 3 of the control mechanism is as shown in fig. 4, in the scheme, in order to facilitate connection or increase of tension, a U-shaped or V-shaped SMA wire 1 is adopted, wherein a bent end 113 is sleeved at a shaft 512 of a controlled part and is limited up and down,

end heads

111 and 112 of the SMA wire 1 are respectively fixed at

fixed columns

311 and 312 on a base 3 and are respectively connected with two poles of a power supply, a hole or a shaft 511 of a driven part is concentric with a shaft or a hole 313 on the base 3, and the SMA wire pulls the driven part to rotate around the shaft or the hole 313 on the base 3 after being electrified, heated and contracted;

the SMA control mechanism of the present invention is not limited to the structure in the above-described embodiment, and various modifications may be made, and in any case, all modifications within the scope not departing from the spirit of the present invention.

Claims

1. The SMA control mechanism is characterized by comprising an SMA wire and a control body, wherein the control body comprises a base and a driving piece, the base and the controlled body are relatively fixed, meanwhile, one end of the SMA wire and a control wire are fixed by the base, the driving piece is rotatably arranged relative to the base, meanwhile, the other end of the SMA wire and a lead wire are fixed by the driving piece, the driving piece is connected with the driven piece, and the driving piece can drive the driven piece to move.

2. The SMA control mechanism of claim 1, wherein one end of the driving member is provided with a spur that drives the driven member.

3. The SMA control mechanism of claim 1, wherein the end of the drive member holding the SMA wire is connected to the wire by welding or riveting or crimping.

4. An SMA control mechanism according to any one of claims 1 to 3, wherein the SMA wire is in the shape of a straight line, a curved line or a spiral.

5. The SMA control mechanism of claim 1, wherein the driven member is a handle, a button, or a button.