JP2565081B2 - Mast telescopic device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a mast expansion / contraction device that is used by being mounted on a spacecraft such as an artificial satellite or a space shuttle to extend or store a mast and move a moving object fixed to the mast. Regarding

[0002]

2. Description of the Related Art Heretofore, as this type of mast expanding / contracting device, there has been an example using a speed reducing mechanism in which a rotary motor and a gear are combined, and a mechanism for converting rotary motion by the rotary motor into extension motion. Further, there is an example in which elasticity (spring) is used and the mast or the like is extended by the elastic force of this elasticity (spring).

As a proposal of this kind, for example, JP-A-62-62
-Telescopic device disclosed in JP-A-205900 and "Extension mast" disclosed in JP-A-1-145298.
Can be mentioned. The former Japanese Patent Laid-Open No. 62-20590
The "Expansion and contraction device" disclosed in Japanese Patent No. 0 adopts an extension / storing method using rails and shafts for the expansion / contraction mechanism of the foldable structure of the artificial satellite, and has a simple structure and high rigidity during extension / storing taking it. In addition, JP-A-1-14529
The "extension mast" disclosed in Japanese Patent Publication No. 8 is composed of a flat belt-shaped tension strand and a winder that winds the tension member of the extension mast used for space facilities, and is inclined when the mast is extended. The member functions as a strength member, and when the mast is stored, it is smoothly stored without being bulky.

[0004] These proposals have room for improvement when they are mounted on a spacecraft which is required to be lightweight in consideration of propulsion at launch. Further, in the current spacecraft in which the configuration is complicated due to multi-function, downsizing of the mounting mechanism is desired, and there is room for improvement in this case as well. That is, in order to obtain the strong extension force required for the mast extension, a high-speed rotation motor, a gear reduction mechanism, and a mechanism for converting rotational movement into extension movement are used, which makes the mechanism complicated and desired. It is difficult to reduce the weight. Further, in an example in which an elastic member (spring) or the like is applied as the extension mechanism for simplification, it is difficult to store it after it is once extended. Therefore, it could not be used for mounting a space shuttle, that is, when it needs to be stored.

As an example of such improvement, there is a proposal of "extension device" disclosed in Japanese Patent Laid-Open No. 60-53499 using a piezoelectric element as a motor. In the "extension device" disclosed in Japanese Patent Application Laid-Open No. 60-53499, a plurality of magnetic extension rods are driven by a motor and connected to extend.

[0006]

However, in the "extension device" disclosed in Japanese Unexamined Patent Publication No. 60-53499, which is the conventional example described above, the magnetic extension rod is driven by a motor to expand and contract. That is, a magnetic member made of an iron material that is relatively heavy is required. Therefore, when it is mounted on a spacecraft, it cannot meet the strict demand for weight reduction during launch propulsion, and there is room for improvement from the viewpoint of weight reduction.

The present invention has been made in view of the above-described circumstances, and the degree of freedom in selecting a mast member to be extended or stored is obtained, which enables weight reduction, and is used in space such as artificial satellites and space vehicles. An object of the present invention is to provide a mast telescopic device that can be easily mounted on a flying object.

[0008]

In order to achieve the above object, a mast expansion / contraction device of the present invention comprises a high-frequency motor having at least an exciting coil having a plurality of coils in an array and a high-frequency excitation drive section, and extension excitation. It is placed near the coil so that it can be extended or stored, and a magnetic member is provided on the outer periphery of a non-magnetic member, and it is extended or stored by surface acoustic waves depending on the phase change direction of the harmonics radiated from the exciting coil. It has a mast and a mast. And, preferably, the moving object is fixed to one end of the mast. Further, the control means is provided, and the high frequency excitation drive section is instructed by the control means to invert the phase change direction of the higher harmonic wave from the excitation coil to extend or store the mast. Further, as the non-magnetic member, any one of aluminum, glass fiber, and resin member is used, and the magnetic member to be joined to the outside of this member is coated with an adhesive containing a magnetic member or an iron plate is fixed. Is used as a configuration.

[0009]

In the mast expanding / contracting device of the present invention having the above-mentioned structure, the mast which is arranged in the vicinity of the exciting coil so as to be able to be extended or stored is composed of the non-magnetic member and the magnetic member provided outside the member. I am configuring. In this case, any of aluminum, glass fiber, and resin member is used as the non-magnetic member, and an adhesive containing iron powder is applied or the iron plate is fixed as the magnetic member. For this reason, the weight of the non-magnetic member that occupies most of the mast can be reduced, and the weight is reduced as compared with the case where the iron member of the magnetic member is used as a whole. That is, the degree of freedom in selecting the mast member can be obtained, the weight can be reduced particularly when launch propulsion is taken into consideration, and the mast member can be easily mounted on a spacecraft such as an artificial satellite and a space shuttle.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the mast expanding / contracting device of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a partial electric block of the configuration of an embodiment of a mast expanding device of the present invention. In FIG. 1, this mast expansion / contraction device includes a control unit 2, a mast expansion / contraction mechanism 4, and this mast expansion / contraction mechanism 4.
And is linearly moved in the arrow direction A or the arrow direction B, and is roughly configured with a moving object 5, for example, a moving object 5 such as a beam antenna mounted on a spacecraft such as an artificial satellite and a space shuttle. The mast expanding / contracting mechanism 4 radiates a high frequency wave to a magnetic material and applies a surface acoustic wave to the high frequency motor 8 for driving, and the high frequency motor 8 extends in the arrow direction A and is extended in the arrow direction B. It has a mast 9 that is moved and stored.

Further, when the mast 9 moves, the left end in the figure moves in the arrow directions A and B, and when the mast 9 moves in the arrow direction B, the mast 9 is accommodated and the mast 9 moves in the arrow direction. It has a tubular slide member 12 for stably sliding when moving to A and B. Further, the high frequency motor 8 includes high frequency excitation drive units 18a and 18b, and an excitation coil 20 that is driven by the high frequency excitation drive units 18a and 18b and includes a plurality of coils arranged in an array.
a and 20b.

The mast 9 is formed by applying a non-magnetic round bar or square pillar mast member 14 such as aluminum, glass fiber or resin member, and an adhesive material containing iron powder to the outer periphery of the mast member 14. , Or a magnetic member 1 with an iron plate fixed
6 and 6. 2A and 2B are cross-sectional views showing the structure of the mast 9. In FIG. 2 (a),
In this example, an adhesive material containing iron powder, which is the magnetic member 16, is applied to the mast member 14 of a round bar such as aluminum, glass fiber, or resin member. In FIG. 2B, in this example, a thin iron plate which is the magnetic member 16 is fixed by screws or the like to the outer two surfaces of the square mast inner member 14 such as aluminum, glass fiber, and resin member.

Next, the operation and function of the mast expanding / contracting device having this structure will be described. By the instruction from the control unit 2,
Exciting coils 2 in which the drive currents from the high-frequency excitation drive units 18a and 18b having different phases are arranged in an array.
Supply to 0a and 20b. Due to this drive current, the high frequency from the exciting coils 20a and 20b is the magnetic member 16 of the mast 9.
Be radiated to.

In this case, the mast 9 is extended in the direction A by the surface acoustic wave depending on the direction of change of the phase of the higher harmonic wave.
That is, the moving object 5 moves. This movement amount is determined by an instruction from the control unit 2 to the high-frequency excitation driving units 18a and 18b, and the movement of the moving object 5 is stopped at a predetermined movement position, and the moving target 5 is fixed. In this case, the total length of the mast 9 and the arrangement position of the storage portion 10 are considered so that the left end portion in the drawing does not come out of the opening of the storage portion 10.

The storage after the extension is performed by an instruction from the control unit 2. That is, the phase change direction of the current supplied from the high frequency excitation drive units 18a and 18b to the excitation coils 20a and 20b is reversed. The mast 9 is driven by the surface acoustic wave depending on the phase change direction of the harmonics from the exciting coils 20a and 20b, is housed in the arrow direction b, and the moving object 5 is also moved in the arrow direction b. This movement amount is determined by the instruction of the high-frequency excitation driving units 18a and 18b from the control unit 2 similarly to the extension, and the movement of the moving object 5 is stopped at a predetermined movement position and becomes a fixed state.

[0016]

As described above, in the mast expanding / contracting device of the present invention, the mast which is arranged in the vicinity of the exciting coil so as to be able to be extended or stored is a non-magnetic member and a magnetic member provided outside the member. It consists of and. In this case, aluminum, glass fiber, or a resin member is used as the non-magnetic member, and as the magnetic member, an adhesive containing iron powder is applied, or an iron plate is fixed and used as a mast. Since the weight of the non-magnetic material that occupies most of the material is reduced, the freedom of choice of mast material is gained, weight reduction is possible, and it is easy for spacecraft such as satellites and space shuttles. It has the effect that it can be installed.

[Brief description of drawings]

FIG. 1 is a side view showing a partial electric block of the configuration of an embodiment of a mast expanding device of the present invention.

FIG. 2A is a cross-sectional view showing a configuration of a mast in which a magnetic member is provided on a mast inner member of a round bar. (B) is sectional drawing which shows the structure of the mast which fixed the magnetic member to the square mast inner member.

[Explanation of symbols]

 2 control section 4 mast expansion mechanism 5 moving object 8 high frequency motor 9 mast 10 storage section 14 mast inner member 16 magnetic member 18a, 18b high frequency excitation drive section 20a, 20b excitation coil

Claims (4)

(57) [Claims] 1. A high-frequency motor including an exciting coil having at least a plurality of coils in an array and a high-frequency exciting driving unit, and a non-magnetic member which is arranged near the exciting coil and can be extended or stored. A mast expander / contractor comprising: a mast having a magnetic member provided on the outer periphery thereof, and the mast being extended or housed by a surface acoustic wave depending on a phase change direction of a harmonic wave radiated from the exciting coil. 2. The mast telescopic device according to claim 1, wherein an object to be moved is fixed to one end of the mast. 3. In addition to the structure of claim 1, a control means is provided, and the control means gives an instruction to the high frequency excitation drive section to invert the phase change direction of the harmonics from the excitation coil. A mast telescopic device that extends or stores the mast. 4. A non-magnetic member is made of aluminum, glass fiber or a resin member, and a magnetic member bonded to the outside of the member is coated with an adhesive containing a magnetic member, or an iron plate is used. The mast telescopic device according to claim 1, wherein the mast telescopic device is used by being fixed.