JPH084727Y2 - Antenna drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an antenna drive device, and more particularly to an Az-El (azimuth-elevation) mount type antenna drive device that directs the antenna in a desired direction.

[Conventional technology]

This type of conventional Az-El mount type antenna driving device, that is, the antenna is rotated around a vertical axis (axis that determines the azimuth angle) and a horizontal axis (axis that determines the depression / elevation angle) and directed in the desired direction. In the antenna driving device, for example, as shown in the perspective view of FIG. 3, the azimuth rotation driving unit 2 is fixed to a fixing plate 5 provided on a roof or the like of a moving body such as a vehicle, A motor 10 that is provided above the azimuth rotation drive unit 2 and has a rotating shaft that rotates around the azimuth axis Y, and an azimuth that is directly connected to the rotating shaft of this motor or that is connected via a gear. The angular rotation structure 3 and the elevation / rotation drive unit 1 fixed to the azimuth rotation structure 3.
And a depression / elevation rotation motor 11 provided in the depression / elevation rotation drive unit 1 and having a rotation axis that rotates around the depression / elevation axis X,
Is it directly connected to the rotation axis that rotates around this elevation axis X,
Alternatively, with respect to the depression / elevation rotary structure 4 connected via a gear, the back surface of the flat antenna 12, that is, the radiation surface of the radio wave is The opposite side was fixed.

[Problems to be solved by the device]

In the conventional Az-El mount type antenna driving device described above, the azimuth angle rotating structure is mounted on the azimuth angle rotating drive unit at the bottom, so that the height of the antenna driving device as a whole increases. This is unavoidable, so that it is often difficult to install this antenna at a place where the allowable height is restricted, such as on the roof of a moving body such as an automobile or a train.

In addition, in order to lower the position of the highest part of the antenna drive section as much as possible, it may be necessary to penetrate a part of the azimuth rotation drive section through the roof of the moving body and store it under the roof. In such a case, there is a drawback in that the structure of the portion for fixing the antenna driving device to the roof of the moving body becomes complicated.

An object of the present invention is to provide an antenna driving device which can be made lower in height than a conventional antenna driving device of this type and which can simplify the structure of a portion for fixing the antenna driving device. Especially.

[Means for solving the problem]

The antenna driving device of the present invention is an antenna driving device which has an azimuth axis and a depression / elevation axis and directs an antenna fixed to a depression / elevation angle rotating structure that rotates around the depression / elevation axis in a desired direction. A first gear for azimuth rotation, which is fixed and has a central axis coinciding with the azimuth axis substantially perpendicular to the plane of the base; and a first gear located above the first gear and rotatable about the azimuth axis. An azimuth angle rotation structure body, which is joined to the base plate with the first gear interposed, and in which the depression / elevation angle rotation structure is rotatably arranged around the depression / elevation axis,
It is fixed to the azimuth rotating structure, has an axis that rotates around an axis parallel to the azimuth axis, and is arranged on this axis and on the substantially same plane as the first azimuth rotating gear. Second
Azimuth rotation drive unit having a motor for rotating the gear, and a series of teeth meshing with the first and second gears provided on the inner periphery of the first and second azimuth rotation gears. And a toothed belt having an annular shape.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 (a) is a plan view of an embodiment of the present invention.
FIG. 1B is a side view of the embodiment of the present invention. Figure 2 shows the first
It is explanatory drawing of the Example of the belt 6 for azimuth rotation in a figure.

On a base 13 fixed to a fixed plate 5 provided on a moving body such as a roof of an automobile, a first gear 8 for azimuth rotation shown in detail in FIG. Is fixed as.

A protrusion (not shown) having a circumferential portion around the Y axis is provided above the gear 8 and the protrusion is rotatably joined to the azimuth rotating structure 3.

That is, the azimuth rotating structure 3 is placed on the base 13 and the azimuth axis Y
It can be rotated around.

On the azimuth angle rotating structure 3, the depression / elevation angle rotating structure 4 is rotatably fixed around the depression / elevation axis X.

An azimuth rotation drive unit in which an azimuth rotation motor 10 having a rotation axis Y1 parallel to the azimuth axis Y is attached to the azimuth rotation structure 3 so that the azimuth rotation axis faces downward. 2 is fixed to the azimuth rotating structure 3.

A second gear 9 for azimuth rotation is fixed to the rotation shaft of the motor 10 for azimuth rotation so as to be located substantially on the same plane as the first gear for azimuth rotation.

The teeth of the first and second gears for rotating the azimuth angle are the same in size, and mesh with a series of teeth provided on the inner circumference of the belt 6 for rotating the azimuth angle for azimuth rotation. Motor for rotation
The torque of 10 is transmitted to the first gear for azimuth rotation.

Since the first gear for azimuth rotation is fixed to the base 13, when the azimuth rotation motor 10 rotates, the azimuth rotation structure 3 rotates about the azimuth axis Y.

The first and second pulleys are used instead of the first and second gears for azimuth rotation, and an annular belt having a smooth inner circumference is used as the belt 6 for azimuth rotation. It is also possible to connect the above-mentioned first and second pulleys with a belt 6 for use.

The axis of rotation of the depression-elevation motor 11 is parallel to the depression-elevation axis X.
A depression / elevation rotation drive unit 1 in which a depression / elevation rotation motor is fixed so as to have X1, is fixed to an azimuth rotation structure 3.

Further, a depression / elevation rotation structure 4 is mounted on the azimuth rotation structure 3 so as to be rotatable around the depression / elevation axis X, and a flat antenna 12 is mounted on the depression / elevation rotation structure 4.
Is attached.

Rotation axis of depression / elevation rotation motor 11 and depression / elevation rotation structure 4
At one end of the rotation axis of the
Is fixed, and an annular belt 7 for depression / elevation angle rotation having a series of teeth on the inner circumference is meshed with the first and second gears for rotation depression / elevation angle, and rotation of depression / elevation angle is performed. Motor for
By the rotation of 11, the depression / elevation angle rotation structure 4 is rotated about the depression / elevation axis X.

It should be noted that the above-described first and second gears for depression / elevation rotation are meshed without interposing the belt 7, or with the rotation shaft of the motor 11 for depression / elevation rotation via one or more other gears. It is also possible to connect the rotation axis of the depression / elevation angle rotating structure 4 and rotate the depression / elevation angle rotating motor 4 to rotate the depression / elevation angle rotating structure 4 around the depression / elevation axis X.

Alternatively, instead of the first and second gears for depression and elevation rotation, first and second pulleys for depression and elevation rotation are used, and an annular belt having a smooth inner circumference between these pulleys is used for depression and elevation rotation. Alternatively, the belt 7 may be used to connect the first and second pulleys for rotating the depression / elevation angle.

[Effect of device]

As described above, according to the present invention, since the azimuth rotation drive unit can be installed on the azimuth rotation structure, as compared with the conventional Az-El mount type antenna drive device of this type, It is possible to reduce the height. For example, on a roof of a moving body such as an automobile or a train, there is a limit to the allowable height, and it is impossible to install the antenna drive device of this type in the related art. Can also be installed.

In addition, in the conventional antenna driving device of this type, for example, when the antenna driving device is installed on the roof of an automobile or the like, a part of the azimuth rotation driving unit is roofed due to the restriction of the allowable height. It may be necessary to house and mount the antenna drive inside the vehicle, and in such a case the structure of the roof part of the automobile where this type of antenna drive is installed becomes complicated, and it takes time and labor to install the antenna drive. However, the antenna driving device of the present invention can be easily mounted on the roof of an automobile or the like without requiring time and labor for such mounting.

[Brief description of drawings]

FIG. 1 (a) is a plan view of an embodiment of the present invention, and FIG. 1 (b).
1 is a side view of FIG. 1 (a), FIG. 2 is an explanatory view showing a relationship between an azimuth angle rotating gear and a belt of FIG. 1 (a), and FIG. 3 is a conventional antenna driving device of this type. It is a perspective view. 1 ... Depression / elevation rotation drive unit, 2 ... Azimuth rotation drive unit, 3 ... Azimuth rotation structure, 4 ... Depression elevation structure, 5 ... Fixed plate, 6 ... Azimuth rotation Belt, 7 ……
Belt for elevation / rotation, 8 ... 1st gear for azimuth rotation,
9 ... 2nd gear for azimuth rotation, 10 ... azimuth rotation motor, 11 ... depression / elevation rotation motor, 12 ... antenna, 13
…… Foundation.

Claims (2)

[Scope of utility model registration request] 1. An antenna driving device for directing an antenna fixed to a depression-elevation angle rotating structure having an azimuth axis and a depression-elevation axis and rotating around the depression-elevation axis in a desired direction, the antenna being fixed to the substrate and the substrate. A first gear for azimuth rotation whose center axis coincides with the azimuth axis substantially perpendicular to the plane of the base; and a first gear located above the first gear and rotatable about the azimuth axis. An azimuth rotating structure that is joined to the base plate with the first gear in between and that has the depression-elevation angle rotating structure rotatably arranged around the depression-elevation axis; and the azimuth axis fixed to the azimuth angle rotating structure. A first axis for rotating the azimuth angle, which has an axis rotating about parallel axes and is on the axis.
Is provided with an azimuth rotation drive unit having a motor for rotating a second gear arranged substantially on the same plane as the first gear, and a series of teeth meshing with the first and second gears on the inner circumference. An antenna drive device, comprising: an annular toothed belt that connects the first and second gears for rotating the azimuth angle. 2. The antenna driving device according to claim 1, wherein a first pulley and a second pulley are used instead of the first and second gears for rotating the azimuth angle, and the first belt and the second pulley are formed by an annular belt. An antenna drive device characterized in that a first pulley and a second pulley for azimuth rotation are connected continuously.