JPH07260400A - Mounting device - Google Patents

Abstract

PURPOSE:To execute fixing by using a material having a shape memorizing characteristic, in relation to a mounting device adapted to a blade mounting, a mounting of a mechanical part and the like of an airframe. CONSTITUTION:A splice 1 is mounted on a surface of an airframe cylindrical body 3. The splice 1 is made of shape memory alloys and has characteristics wherein a female type opening section opens by executing a cooling and, when a temperature rises, a returning to an original shape arises. A male section of a blade 2 is inserted into a female type opening section of the splice 1 and is fixed. A mounting of the blade 2 is executed by cooling the splice 1, opening the female type opening section and inserting the male type shape section of the blade 2 and then, when temperature is made to rise, a returning to an original condition arises and the female type opening section shrinks, and, as a fixing is executed by tightening the blade 2 with a friction force, a fastener for mounting or a punching becomes unnecessary, and besides, a stress concentration section becomes to disapper.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a flying product, a wing,
The present invention relates to a mounting device that is applied when mounting an antenna or between mechanical parts.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional blade mounting mechanism for a flying product. In the figure, a wing fixing splice 1 is attached to a flying body 3 in accordance with the curved surface of the body, and a wing 2 is connected to the splice 1 with a fixing fastener (a bolt, a nut or a rivet).

[0003]

When the wing and the fuselage of such a conventional flying body are required to be attached and detached (during maintenance work, etc.), they are joined and separated by fasteners (bolts, nuts, etc.). In some cases, the fastener can be removed. If unnecessary, they are fixed by connecting them with rivets or the like. This method has problems such as the need to drill fasteners on the fuselage and wing, the number of fastener parts is large, etc.Because a concentrated load is applied to the fastener part, it is necessary to consider the strength and rigidity of that part. is there.

Further, there is a problem that the prescribed torque application work and management of the fastener are required.

[0005]

In order to solve such a problem, the present invention provides a mounting device having a male-female fitting structure as a mounting portion, and a male fitting portion having a shape memory material. To do. That is, the present invention is a shape-memory material having a fitting characteristic between a male member and a female member and having a shape characteristic in which the fitting portion of the female member is contracted in a fitted state, and the male member is Provided is a mounting device characterized by fixing the female member.

[0006]

The mounting device of the present invention has such a shape and dimensions that it is fixed in a fitted state at a working temperature, and the fitting portion of the female die member has a shape memory whose critical temperature (shape recovery temperature) is below the working temperature. Depending on the characteristics, it is manufactured in such a shape that the binding force of the mating state is generated above the critical temperature. After cooling the fitting part to below the critical temperature, forcibly deforming the female mold member into the open shape, fitting the male mold member, and then heating above the critical temperature, the female mold member recovers to its original shape. To do. As a result, the male and female members are in a fitted state.

For removal, the male member can be removed by cooling the female member below the critical temperature and then forcibly deforming the female member into the open shape. The shape memory material has a small yielding force below the critical temperature, deforms with a small stress, and generates a large shape recovery force at the critical temperature. .

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a perspective view of a mounting device according to an embodiment of the present invention when applied to a flying vehicle.
Is the A-A arrow view. In FIG. 1, reference numeral 1 denotes a splice, which is attached to the outer surface of the flying body 3 by fasteners. Reference numeral 2 is a wing fitted and attached to the splice. This splice 1 is a shape memory alloy (Cu-
Zn-Al alloy). The material may also be a similar material with such shape memory properties.

In FIG. 2, the blade 2 is a male fitting portion 2
a, the splice 1 is of a single type and has a female fitting portion 1a, and both fitting portions 1a, 2
"a" is a fitting dimension in which sufficient frictional force is exerted during fitting.

FIG. 3 is an explanatory view for mounting such a wing, in which the wing 2 is mounted on a splice 1 made of a shape memory alloy, which is mounted on the surface of the flying body 3, and is a liquid nitrogen bottle for cooling. Liquid nitrogen from 7 is put into the cooling unit controller 6 via the tubes, and the cooling units 4a and 4b are connected from the controller 6 to the tubes 8a and 8b.
The splice 1 is cooled by flowing it into the.

With this structure, the flying body 3 of the wing 2
For installation, the splice 1 is cooled to about -20 ° C from the left and right by the cooling units 4a and 4b, and the splice 1 is plastically deformed to an open state at a temperature below the critical temperature,
Insert the wing 2 into the splice 1.

Next, when the cooling units 4a and 4b are separated from the splice 1, the temperature of the splice 1 rises to reach the critical temperature or higher. As a result, the splice 1 returns to the fixed state of the blade 2, so that the blade 2 is fixed.

FIG. 4 is a view showing an operating state at the time of mounting,
FIG. 4A shows a state in which the opening of the splice 1 is expanded by being cooled by the cooling units 4a and 4b after being cooled.
FIG. 2B shows the fitting portion 2 of the blade 2 in the state of FIG.
a is inserted into the fitting portion 1a of the splice 1 through the opening, cooling is stopped, the temperature rises, the shape memory characteristic causes the splice 1 to contract back to its original state, and is tightened and fixed. Is shown.

The blade 2 is removed by cooling the splice 1 below the critical temperature again and forcibly opening the female portion of the splice 1 with mechanical force.

In consideration of the deformation characteristics of the shape memory alloy of the material, the opening portion of the splice 1 described above is made larger than the fitting portion of the blade 2 in the opened state by cooling, or Design the size so that it can be forcibly inserted by mechanical force, and determine the size so that sufficient restraining force can be obtained in the original state.

That is, in the present embodiment, the shape and dimensions are such that the splice 1 and the blade 2 are fixed in a fitted state at the operating temperature. Female fitting portion 1a of splice 1
As described above, the shape memory alloy whose critical temperature (shape recovery temperature) is not higher than the working temperature as described above is manufactured into a shape in which a binding force in the fitted state is generated at the critical temperature or higher. The shape memory alloy is applied to the present mounting device with the characteristics that the yield strength is small below the critical temperature, it deforms with a small stress, and a large shape recovery force occurs at the critical temperature.

With such a wing attachment mechanism for a flying body, there is no need for fastener parts for attaching the wing 2 to the splice 1, no drilling is required for that, and further concentrated load stress is generated. Since the part that does not exist is also eliminated, the wing attachment mechanism is simplified and the reliability of the flying structure is improved. Further, the present attachment device is applied not only to the structure of the flying object but also to the attachment between the members of the machine parts, and is not limited to the attachment of the flying object to the wing.

[0018]

As described above, according to the mounting device of the present invention described above, a material having a shape memory characteristic is used in the fitting portion of the male and female members, so that a fastener component for blade mounting and a fastener component for blade mounting can be provided rather than the conventional mounting mechanism. Since the drilling process is unnecessary and the stress concentrated load portion is eliminated, the mounting mechanism is simplified and the reliability of the mounting structure between members is further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a mounting device according to an embodiment of the present invention,
This is an example applied to a flying object.

FIG. 2 is a view on arrow AA in FIG.

FIG. 3 is a perspective view illustrating an operation of attaching the blade in the embodiment of the present invention.

FIG. 4 is a front view showing a blade mounting state in one embodiment of the present invention, (a) showing a cooled state and (b) showing a restored state.

FIG. 5 is a perspective view showing a state in which a wing of a conventional flying body is attached.

[Explanation of symbols]

 1 Splice 1a Fitting part 2 Wing 2a Fitting part 3 Flight fuselage 4a Cooling unit 4b Cooling unit 6 Cooling unit controller

Claims (1)

[Claims] 1. A shape memory material having a fitting characteristic between a male member and a female member, wherein the fitting portion of the female member has a shape characteristic that contracts in a fitted state. An attachment device for fixing a female member.