KR101574664B1 - Separation device using a shape memory alloy wire - Google Patents

Abstract

According to the present invention, a separation device using a shape memory alloy wire comprises: a shape memory alloy wire (170) to be contracted by power supply; and a plurality of steel balls (140) containing four steel balls positioned between a rotationer (120) receiving a rotational force using spring force, and a separation pin (150) inserted in the rotationer to receive a preload of the pin (150), and one steel ball positioned in a cylinder key (122) of the rotationer (120) to be released when the shape memory alloy wire (170) is contracted. As such, a restriction and release mechanism of the steel balls interlocked with the separation pin (150) is applied as one wire using the shape memory alloy (170). Moreover, the present invention reduces power required to drive the device and reduces an impact generated during separation in high vibrational environments; is easily reused by a simple structure and a simple operation after driving; and improves reliability of a separation function.

Description

[0001] The present invention relates to a separating device using a shape memory alloy wire,

The present invention relates to a non-explosion-type separator, and more particularly, to a separator using a shape memory alloy wire capable of being separated even in a high-vibration environment and capable of being reused by simple operation after being driven.

In general, the two mechanically coupled members are separated by explosive separation. The explosion type separation system consists of a bolt filled with a gunpowder inside the body and a wire for electrical signal, thereby separating the two joint members using the explosive force of the explosive explosion with an electrical signal.

However, when the explosion-type separating apparatus is used, the reliability of the separating operation can be lowered because the sensor and the equipment installed close to the shock source can be damaged by the impact, Since the materials such as gunpowder are used, the manufacturing process can not help but be complicated.

There is a non-detonating separator as a technique for replacing the detonator separator by improving the impact damage and the complicated manufacturing process. Examples of such non-detonating separator include the following patent documents.

European Patent Publication EP 1 426 291 B1 (Mar. 29, 2006) U.S. Patent Publication No. 5,722,709 (Mar. 3, 1998)

Patent Document 1 (EP 1 426 291 B1) discloses a non-explosive actuator using a spool assembly, and Patent Document 2 (US Pat. No. 5,722,709) discloses a structure in which a spiral retainer is expanded or contracted using a shape memory alloy. A configuration is described.

However, the above-mentioned non-explosive separator is merely an example of a technique that can not provide sufficient structural characteristics in terms of simplification of structure, re-usability of separation apparatus, and reliability of separation function.

In view of the above, the present invention adopts a constraining mechanism of a steel ball associated with a separation pin in the form of a single wire using a shape memory alloy, thereby lowering the power required for driving the apparatus, And in particular, it is an object of the present invention to provide a separation apparatus using a shape memory alloy wire in which the reliability of the separation function can be improved by simplifying the reuse operation after driving with a simple structure.

According to an aspect of the present invention, there is provided a non-explosive separation apparatus including: a cylindrical mid-housing having an inner space; A cylindrical rotator having a protruding boss protruding from the outer circumferential surface, a cylinder key engraved on the outer circumferential surface, and an inner boss protruding from the inner circumferential surface; Wherein the rotoriser is a spring device connected to the protruding boss and transmitting rotational force to the rotorizer by a spring force; A top cover having an axial boss inserted into the inside of the mid-housing, the axial boss being inserted into the rotoriser, the spring device being positioned on an outer circumferential surface; A separation pin inserted through the top cover and inserted into the rotorizer; Four steel balls positioned between the inner boss of the rotoriser and the outer circumferential surface of the separating pin to receive a preload of the separating pin and a plurality of balls made of one steel ball positioned with the cylinder key; A shape memory alloy wire for releasing a constraint on one steel ball located at the cylinder key by deformation by power supply; A power device connecting a pair of electrodes to the shape memory alloy wire to apply electric power, and a pressing force applied to the one steel ball is released by a length deformation of the shape memory alloy wire; A holder that receives the shape memory alloy wire as an inner space and is fastened to the mid-housing; And a control unit.

Wherein the spring device comprises four pairs of a spring holder, a spring stopper and a spring clamp; The spring holder prevents the spring clamp from coming off; One arm portion of the spring clamp is adjusted by the spring stopper and the other arm portion of the spring clamp is fixed by the protrusion boss of the rotorizer and is transmitted for rotation of the rotatorizer when the shape memory alloy wire is contracted The spring rotation restoring force is suppressed. The leaf spring is applied to the spring clamp.

The pin forms a narrow neck of the lower portion of the head, and the four steel balls are located on the neck.

The shape memory alloy wire shrinks when temperature is applied by applying electricity, and has a characteristic of returning to an initial length when the temperature is lowered again. The shape memory alloy wire is bent at 90 degrees inside the holder.

Wherein the holder comprises a first holder and a second holder coupled to each other, wherein the first holder is coupled to the mating surface of the mid-housing, and the second holder forms a space for receiving the shape memory alloy wire, And is coupled to the first holder.

In the present invention, the steel ball used for restraining the separating device and the restraint releasing mechanism for releasing the restraint of the steel ball while using the structure of the separating pin constrained by the steel ball are constituted by one wire, The separation driver can be configured as simple as possible.

Further, the present invention can improve the reliability of the separating function while reducing the manufacturing cost by simplifying the structure of the separating device.

Further, the present invention has the effect of facilitating repeated use by using a shape memory alloy wire, lowering the power required for driving the device, reducing the amount of impact generated during separation, and separating even in a high vibration environment.

FIG. 1 is an exploded perspective view of a non-explosive separation apparatus according to the present invention, FIG. 2 is an assembled state in which a mid-housing, a top cover and a holder are removed from a non-explosive separation apparatus according to the present invention, FIG. 4 is a front view and a rear view of the non-explosive separation apparatus of the present invention. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The present invention is not limited to these embodiments.

FIG. 1 is an exploded perspective view of a non-explosive separation apparatus according to an embodiment of the present invention, and FIGS. 2 and 3 each show an assembly state in which a mid-housing, a top cover and a holder are removed. Sectional view of the non-explosive separation device according to the invention.

As shown in the figure, the non-explosive separation apparatus 100 includes a cylindrical mid-housing 110 having an internal space, a cylindrical rotatorizer 120 having an internal space, spring devices 131, 132 and 133, A top cover 160, a shape memory alloy wire 170, a power device 180, and holders 190a and 190b.

More specifically, the mid-housing 110 is provided with an inner space to which the top cover 160 is coupled, so that the separating pin 150 coupled to the top cover 160 protrudes to one side, and the holders 190a and 190b The holders 190a and 190b are positioned at portions opposite to the separating pin 150 by providing a coupling surface for coupling.

The rotatable member 120 is formed in a cylindrical shape having a hollow hole so that the separating pin 150 is inserted and the wall of the hollow hole and the separating pin 150 Four steel balls among the plurality of balls 140 are positioned between the necks 152. Particularly, the rotatorizer 120 is further provided with a cylinder key 122 along with four protruding bosses 121 having an equal interval on the outer peripheral surface. Each of the protruding bosses 121 is connected to the spring devices 131, 132, and 133 to limit the rotation angle of the rotatorizer 120. [ One of the plurality of steel balls 140 is positioned in the cylinder key 122. Further, four inner bosses 123 protruded to contact four steel balls are formed on the inner circumferential surface, which is a wall surface of the hollow hole of the rotoriser 120 (see FIG. 3).

More specifically, the spring devices 131, 132, and 133 are formed of a pair of spring holders 131, spring stoppers 132, and spring clamps 133, And is connected to the boss 121. In particular, referring to FIGS. 2 and 3, the four pairs of spring devices 131, 132, and 133 are arranged at equal intervals by being positioned at B, C, and D, respectively, The spring holder 131 prevents the spring clamp 133 from coming off. The spring stopper 132 fixes one arm portion of the spring clamp 133 so as to generate a rotational force of the spring clamp 133 between the spring stopper 132 and the rotorizer 120. 4, the spring clamp 133 urges the rotor 130 to transmit the restoring force of the spring, which has been restrained by the rotation of the rotor 120 during the retraction of the shape memory alloy wire 170, And the other arm portion is fixed to the projection boss 121 of the knob 120. In particular, the spring clamp 133 can use a leaf spring.

Specifically, the plurality of steel balls 140 are composed of at least five steel balls. 2 and 3, the plurality of steel balls 140 are disposed at the center of the top cover 160, and the inner boss 123 protruding from the inner circumferential surface of the rotatorizer 120, 150 located in the cylinder key 122 so as to be constrained by the cylinder key 122 of the locker 120 and to restrain the spring clamp 133, And steel ball.

Specifically, the separating pin 150 penetrates the top cover 160 and contacts the four steel balls out of the plurality of steel balls 140 disposed inside the rotor 200, do. To this end, the separating pin 150 forms a narrow neck 154 of the lower portion of the head 152, and positions four steel balls in the neck 154.

Specifically, the top cover 160 is provided with a rim having a wall surface formed by a pair of four pairs of spring devices 131, 132, and 133 located outside the top cover 160, and an axial boss 161 The separating pin 150 is inserted.

Specifically, the shape memory alloy wire 170 can rotate the rotatorizer 120 by releasing the constraining force of one steel ball 140 positioned in the cylinder key 122 so as to restrain the rotatorizer 120 . To this end, the shape memory alloy wire 170 shrinks when the temperature is applied by applying electricity, and returns to the initial length when the temperature is lowered again. The deformation of the shape memory alloy wire 170 may cause rotation of the rotorizer 120 by releasing the pressing force of the power device 180 that has pressed the one steel ball 140 and restrained the rotorizer 120 . In particular, the shape memory alloy wire 170 may be arranged at an angle of 90 degrees inside the holders 190a and 190b.

Specifically, the power device 180 shrinks the shape memory alloy wire 170 by connecting a pair of electrodes to the shape memory alloy wire 170 and applying electricity. The electrical supply of the power device 180 therefore causes a length contraction of the shape memory alloy wire 170 and the length contraction causes the power device 180 to be separated from the steel ball 140, And serves as a power source for releasing the restraining force of the electric power device 180.

Specifically, the holders 190a and 190b receive the shape memory alloy wire 170 inside. The holder 190a and the holder 190b are formed of a first holder 190a and a second holder 190b coupled to each other and the first holder 190a is fastened to the mating surface of the mid housing 110 , The second holder 190b forms a space for receiving the shape memory alloy wire 170 and is coupled to the first holder 190a.

Meanwhile, FIG. 4 shows a state in which the non-explosive separation device of this embodiment is separated from the non-explosive separation device after being operated.

As shown in the figure, four steel balls 140 positioned on the outer circumferential surface of the separating pin 150 in the state before separation of the non-explosive separation apparatus 1 are in contact with the inner surface of the rotor 200, One ball 140 positioned in the cylinder key 122 of the rotatier 120 maintains the inserted position in the neck 152 of the pin 150 by being supported by the boss 123 and the cylinder key 122 So as to prevent the rotation of the rotator 120 from the spring pressing force. When this state is maintained, each of the four pairs constituting the spring devices 131, 132, and 133 maintains a state of being positioned at positions B, C, and D that are divided by 90 degrees with reference to the A region. Therefore, even if the spring stopper 132 fixing one arm portion of the spring clamp 133 generates a rotational force with respect to the rotorizer 120, the other arm portion of the spring clamp 133 remains fixed The rotational force by the spring is suppressed.

On the other hand, when power is supplied to the power device 180 for separation of the non-detonation separator 1 to cause shrinkage of the shape memory alloy wire 170, contraction of the shape memory alloy wire 170 causes the cylinder key 122 The spring clamp 133 releases the spring rotation restraining force that was restrained by the spring clamp 133 so that the rotorisor 120 is rotated by releasing the restraint of the power supply device 180 to one steel ball 140 And transmits it to the rotatorizer 120. As a result, the rotor 140 is rotated, and as a result, the four steel balls 140 are released from the restraint by the inner boss 123 protruding from the inner circumferential surface, which is the hollow hole wall surface of the rotor sealer 120, And is separated from the neck 152 of the first pin 150 to be separated and receives the preload of the pin 150. This separation is completed at the positions (a-1, b-1, c-1, d-1) where the projection boss 121 of the rotorizer 120 contacts the spring stopper 132, respectively.

As described above, the separation apparatus using the shape memory alloy wire according to the present embodiment includes the shape memory alloy wire 170 in which shrinkage by power supply occurs; Four steel balls positioned between the outer circumferential surfaces of the separation pins 150 inserted in the rotorizer 120 receiving the rotational force of the spring force and receiving the preload of the pins 150, A plurality of steel balls 140 made of one steel ball positioned in the cylinder key 122 of the rotatorizer 120 are included to release the constraint at the time of being released so that the restraining of the steel ball 140 associated with the separation pin 150 It is possible to apply the mechanism in the form of a single wire using the shape memory alloy 170. In particular, it is possible to reduce the power required for driving the device, reduce the amount of impact generated during the separation, The reliability of the separation function is improved.

100: separator 110: mid-housing
120: Rotorizer 121: Projection boss
122: cylinder key 131: spring holder
132: spring stopper 133: spring clamp
140: steel ball 150: separation pin
152: head 154: neck
160: Top cover 161: Axial boss
170: Shape memory alloy wire
180: Power device
190a, 190b: first and second holders

Claims (7)

A cylindrical mid-housing defining an inner space;
A cylindrical rotator having a protruding boss protruding from the outer circumferential surface, a cylinder key engraved on the outer circumferential surface, and an inner boss protruding from the inner circumferential surface;
Wherein the rotoriser is a spring device connected to the protruding boss and transmitting rotational force to the rotorizer by a spring force;
A top cover having an axial boss inserted into the inside of the mid-housing, the axial boss being inserted into the rotoriser, the spring device being positioned on an outer circumferential surface;
A separation pin inserted through the top cover and inserted into the rotorizer;
Four steel balls positioned between the inner boss of the rotoriser and the outer circumferential surface of the separating pin to receive a preload of the separating pin and a plurality of balls made of one steel ball positioned with the cylinder key;
A shape memory alloy wire for releasing a constraint on one steel ball located at the cylinder key by deformation by power supply;
A power device connecting a pair of electrodes to the shape memory alloy wire to apply electric power, and a pressing force applied to the one steel ball is released by a length deformation of the shape memory alloy wire;
A holder that receives the shape memory alloy wire as an inner space and is fastened to the mid-housing; Wherein the shape memory alloy wire is a wire.
[2] The apparatus of claim 1, wherein the spring device comprises four pairs of spring holders, spring stoppers, and spring clamps;
The spring holder prevents the spring clamp from coming off; One arm portion of the spring clamp is fixed by the spring stopper and the other arm portion of the spring clamp is fixed by a protruding boss of the rotorizer and is transmitted for rotation of the rotatorizer when the shape memory alloy wire is contracted And the restoring force of the spring rotation is suppressed.
The separating apparatus using a shape memory alloy wire according to claim 2, wherein the spring clamp is a leaf spring.
The separating apparatus using the shape memory alloy wire according to claim 1, wherein the pin forms a narrow neck of the lower portion of the head, and the four steel balls are located on the neck. 2. The separation device using a shape memory alloy wire according to claim 1, wherein said shape memory alloy wire shrinks when temperature is applied by applying electricity, and returns to the initial length when temperature is lowered again.
6. The separation apparatus using a shape memory alloy wire according to claim 5, wherein the shape memory alloy wire is bent at 90 degrees inside the holder.
2. The connector according to claim 1, wherein the holder comprises a first holder and a second holder which are coupled to each other, wherein the first holder is fastened to the mating surface of the mid-housing, Wherein the first and second holders are coupled to the first holder by forming a space therebetween.

Images