JPH05168198A - Antenna actuator - Google Patents

Abstract

PURPOSE:To adjust the two directions of the elevation and the azimuth of an antenna each independently with one motor. CONSTITUTION:1 is an antenna part, and an antenna body is attached to the top, and 2 is a shaft part, and is connected to the shaft of a motor. A clutch 5 is changed over for engagement position by the operation of a changeover switch 16. When the clutch 5 is set to 1 side of an upper clutch part 51, the power of the shaft part 2 is transmitted to a worm wheel 4 through a worm gear 3 and rotates the worm wheel, and the antenna part 1 also rotates at the same time, and it adjusts either the elevation or the azimuth of the antenna. Moreover, when the clutch 5 is set to the side of a lower clutch part 52, the power of the shaft part 2 is transmitted to a worm wheel 11 via spur gears 6 and 7, bevel gears 8 and 9, and a worm gear 10 and rotates the worm wheel 11, and at the same time, the antenna part 1 also rotates, which adjusts the other between the elevation and the azimuth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication satellite antenna and a device for moving the direction of the antenna.

[0002]

2. Description of the Related Art In an antenna mainly used for consumer use, in order to receive a plurality of satellite communications (including satellite broadcasting), the elevation direction of the antenna is predetermined by an adjusting device provided in the antenna body. Adjust in the direction of
Adjustment of the azimuth angle of the antenna is performed by rotating an actuator provided on the antenna in parallel with the equatorial plane corresponding to a desired satellite. FIG. 1 is a configuration diagram of a main part of a uniaxially controlled antenna actuator showing a conventional example.
As shown in the figure, the rotation of the motor shaft 12 is transmitted to the worm wheel 14 via the worm gear 13, and the antenna unit 1 fixed to the worm wheel 14 is rotated. However, the geostationary orbit of the satellite is on the equatorial plane centered on the north-south axis of the earth, but the rotational orbit of the actuator is the orbit centered on the place where the antenna unit 1 is installed, so the actual satellite becomes larger as the rotational angle increases. There is an error in the direction of and the degree gradually increases. Further, if the adjustment at the initial setting is insufficient, the degree of the error becomes larger.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when the error deviates by several degrees, the range of the directivity of the satellite communication antenna deviates, and good reception is expected. I don't get it. This is because the satellite is as far as about 3800 km,
It also shows that the transmission output is small, and that it is necessary to strictly determine the direction. Therefore, the present invention provides an antenna actuator that can be accurately adjusted at the initial setting and that minimizes an error caused by the rotation of the antenna actuator due to the uniaxial control at low cost.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an antenna actuator for receiving a plurality of satellite communications (including satellite broadcasts), the first meshing position and the second meshing position. A first deceleration part for decelerating and transmitting the power of the motor through a clutch having a switching means for switching to the meshing position and a clutch set in the first meshing position, and the first deceleration part for transmitting the power. Adjusting either the elevation angle or the azimuth angle of the antenna by turning power, and decelerating and transmitting the power of the motor through the motor and the clutch set in the second meshing position. An antenna actuator, characterized in that the second deceleration unit and the rotational force transmitted by the second deceleration unit are used to adjust either the elevation angle or the azimuth angle of the antenna.

[0005]

According to the above construction, in the antenna actuator according to the present invention, when the clutch is set to the first meshing position or the second meshing position, the power of the motor is transmitted through the clutch to the first reduction gear unit, Alternatively, the antenna is rotated at the same speed as the first speed reducer or the second speed reducer after being decelerated in the second speed reducer, and the elevation angle or the azimuth angle of the antenna is adjusted to adjust one antenna. The motor can move the antenna independently in two directions of elevation and azimuth. It can be controlled by two axes, and at least fine adjustment of elevation can be performed to accurately adjust the direction of each satellite.

[0006]

Embodiments of the biaxial control antenna actuator according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of a main part of a biaxial control antenna actuator according to an embodiment of the present invention. In the figure, reference numeral 1 denotes an antenna portion, the antenna main body being attached to the tip, and 2 denotes a shaft portion connected to a motor shaft (not shown). A solenoid 15 is attached to the clutch 5, and can be switched to a first meshing position or a second meshing position by operating a changeover switch 16. When the clutch 5 is set on the upper clutch portion 51 side, the clutch 5 and the upper clutch portion 51 mesh with each other, and the power of the shaft portion 2 is a worm gear that is connected to the upper clutch portion 51 and the shaft 53 via the clutch 5. The rotation speed is greatly reduced by the rotation transmission to the worm wheel 4 via 3 and, conversely, the power is greatly increased, and the antenna portion 1 attached to the worm wheel 4 also rotates at the same time as the worm wheel 4 rotates. Then, adjust either the elevation angle or the azimuth angle of the antenna. Incidentally, the upper clutch portion 51 and the shaft 53 described above.
The worm gear 3 and the worm gear 3 are loosely fitted to the shaft portion 2. When the clutch 5 is set on the lower crank portion 52 side, the clutch 5 and the lower clutch portion 52 mesh with each other, and the power of the shaft portion 2 is connected to the lower clutch portion 52 and the shaft 54 via the clutch 5. It is transmitted to the spur gear 7 via the spur gear 6, the rotational speed is reduced, and conversely the power is increased. Further, the power reduced by the spur gear 7 is transmitted through the bevel gear 8 that rotates coaxially with the spur gear 7, the direction of the force is converted and the speed is reduced by the bevel gear 9, and the power is further coaxial with the bevel gear 9. It is transmitted from the worm gear 10 rotating like a circle to the worm wheel 11 to be greatly decelerated, and conversely the power is greatly increased. As the worm wheel 11 rotates, the antenna unit 1 also rotates at the same time to adjust either the elevation angle or the azimuth angle of the antenna. The lower clutch portion 52, the shaft 54 and the spur gear 6 are loosely fitted to the shaft portion 2. Further, due to the combination of the worm wheel 4 and the worm gear 3 or the worm wheel 11 and the worm gear 10, the external force (wind pressure or the like) applied to the antenna unit 1 contrary to the above, for example, in the case of a parabolic antenna with a diameter of 1 m, the wind speed is 40 m. Since about 100 Kg) is transmitted after being significantly lowered, it works so that the adjusted elevation angle and azimuth angle do not change.

[0007]

As described above, in the antenna actuator according to the present invention, when the clutch is set to the first meshing position or the second meshing position, the power of the motor is first decelerated through the clutch. Section or the second deceleration unit decelerates and is transmitted, and the antenna unit that rotates simultaneously with the first deceleration unit or the second deceleration unit adjusts the elevation angle or the azimuth angle of the antenna. With this motor, the antenna can be moved independently in two directions of elevation angle and azimuth angle, and can be controlled by two axes, and at least the elevation angle can be finely adjusted and accurately adjusted to the direction of each satellite. Also, since only one motor is used, 2
It is possible to realize axis control at low cost.

[Brief description of drawings]

FIG. 1 is a configuration diagram of essential parts of a biaxial control antenna actuator according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a main part of a single-axis control antenna actuator showing a conventional example.

[Explanation of symbols]

 1 Antenna Part 2 Shaft Part 3 Worm Gear 4 Worm Wheel 5 Clutch 6 Spur Gear 7 Spur Gear 8 Bevel Gear 9 Bevel Gear 10 Worm Gear 11 Worm Wheel 12 Motor Shaft 13 Worm Gear 14 Worm Wheel 15 Solenoid 16 Changeover Switch 51 Upper Clutch Part 52 lower clutch part 53 shaft 54 shaft

Claims (2)

[Claims] 1. An antenna actuator for receiving a plurality of satellite communications (including satellite broadcasting), a clutch having switching means for switching between a first meshing position and a second meshing position, and a first tooth. A first deceleration unit that decelerates and transmits the power of the motor via a clutch that is set to the in-position, and either the elevation angle or the azimuth angle of the antenna by the rotational power transmitted by the first deceleration unit. A second speed reduction unit that adjusts the speed and transmits the power of the motor by decelerating the power of the motor via the motor and the clutch set to the second meshing position; An antenna actuator, characterized in that either the elevation angle or the azimuth angle of the antenna is adjusted. 2. An antenna actuator for receiving a plurality of satellite communications (including satellite broadcasting), a solenoid for switching the clutch between two stages, and a clutch having a changeover switch for operating the solenoid, 1
A worm gear that rotates coaxially with the motor and transmits power through the clutch set at the meshing position, a worm wheel that meshes with the worm gear, and an antenna unit attached to the worm wheel. , The elevation angle or the azimuth angle of the antenna is adjusted, and the spur gear that rotates coaxially with the motor and transmits power through the clutch set at the second meshing position, A large spur gear that meshes with the spur gear, a bevel gear that rotates coaxially with the large spur gear, a large bevel gear that meshes with the bevel gear, and a worm gear that rotates coaxially with the large bevel gear. The worm wheel that meshes with the worm gear and the antenna part attached to the worm wheel adjust either the elevation angle or the azimuth angle of the antenna. Antenna actuator to be.