JPH0256842B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a rotational drive device for an antenna device.

In fishing radio, amateur radio, etc., the location of the partner station is unspecified, and in order to clearly communicate with any unspecified partner station, it is necessary to emit a beam with directivity in the target direction. A multi-element antenna device is used with a rotary drive device.

Furthermore, in the long-distance communication band, a large number of elements are required in the antenna device in order to emit a beam with sharp directivity in the target direction, which increases the weight of the antenna device itself, and accordingly, the driving torque of the rotary drive device must be increased. Must be.

Therefore, conventionally, each antenna device of different weight was equipped with a rotary drive device having a driving torque suitable for the weight, so it was necessary to prepare a rotary drive device of the type corresponding to each antenna device. When increasing or decreasing the number of elements in an already installed antenna device, the rotary drive device must also be replaced, which requires the dismantling of the existing antenna device, which is a time-consuming problem.

The present application has been made in view of this point, and is a system in which a plurality of drive units each consisting of a drive section and a gear mechanism are sequentially connected to a rotating body that rotates a rotation drive device of an antenna device by pivoting the antenna rotation shaft. The last stage gear in the gear mechanism of the rear drive unit is meshed with a predetermined gear in the gear mechanism of the front drive unit, and driving forces are superimposed in series to drive rotation.

An embodiment of the present application will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an antenna device, which is composed of an antenna element 1a and a rotating shaft 1b.The rotating shaft 1b is attached to a rotary drive device 2, and this rotary drive device 2 is fixed to the upper part of an antenna support 3. There is.

Next, the rotary drive device 2 will be explained in detail with reference to FIG. 2 and subsequent figures.

Reference numeral 11 denotes a main casing having an opening 12a formed on its top surface and an opening 12b formed on its side surface.A receiving cylinder 13 is fixed to the top, and its upper circumferential surface 13a protrudes from the top opening 12a. This receiver body 1
An inverted bowl-shaped rotating body 15 having an internal gear 14 fitted to the inner circumference of the mouth edge thereof is fitted to the upper circumferential surface portion 13a of No. 3 through a ball bearing 16, and the upper circumferential surface portion An edge frame 18 is opposed to the lower surface side of 13a via a ball bearing 17, and this edge frame 18 is fastened and fixed to the edge of the rotating body 15 with screws 19, so that the rotating body 15 is attached to the upper circumferential surface of the receiving cylinder 13. It is attached to 13a so that it cannot move vertically but can rotate horizontally. A bracket 20 is fixed to the upper surface of this rotary body 15, which supports the antenna rotation shaft 1b.

In addition, the lower end of the main shaft 22, which has an input gear 21 fixed to the lower part and an axial tooth groove gear part 22a formed in the upper part, is attached to the bottomed cylinder part 13b of the lower half of the receiving cylinder body 13 via a bearing 23a. The upper end of the main shaft 22 is located inside the rotating body 15, and the shaft is connected via a bearing 23b to a support plate 25 fixed to the upper circumferential surface 13a of the receiving cylinder body 13 via cylindrical struts 24a and 24b. supported. Between the upper gear portion 22a of the main shaft 22 and the internal gear 14, the upper circumferential surface portion 13a of the receiving cylinder body 13 and the support plate 25 are provided with a shaft-supporting cylindrical column 24a,
Intermediate gears 27a and 27b, which are rotatably attached to shafts 26a and 26b inserted through shaft 24b, are engaged with each other to transmit rotation of main shaft 22 to internal gear 14 and rotate body 15. An antenna direction detection volume 28 is fixed on the support plate 25,
A gear portion 29 is provided on the operating shaft 29 of this volume 28.
a is formed, and this gear portion 29a and the internal gear 1
A gear 31 supported by a shaft 30 on the support plate 25 is interposed and meshed with the rotation body 15 , and the rotation of the rotating body 15 is transmitted to the volume operation shaft 29 . Further, on the support plate 25, switches 32a' and 32b' having contact pieces 32a' and 32b' are disposed opposite to each other.
An insert body 32c is rotatably disposed between the free ends of the contact pieces 32a' and 32b' of the rotary body 15, and a protrusion 15a is provided on the inner surface of the rotary body 15. When the 15 rotates approximately once in one direction, the protrusion 15a contacts the operating body 32c and rotates in one direction to press the contact piece 32a', and when it rotates approximately once in the other direction, the protrusion 15a rotates the operating body 32c in the other direction. Press the contact piece 32b' by moving the switch 32b'
a and 32b are operated. This switch 32a,
By switching 32b, the drive unit is switched between forward and reverse directions, which will be described later. Side opening 1 of main housing 11
A plurality of drive units 33 for rotationally driving the main shaft 22 are sequentially and removably fitted and fixed in series to the main shaft 2b.

This drive unit 33 has a main housing 11 on the rear surface.
Openings 34a, 34b of the same size as the side opening 12b of
In this example, an electric motor 35 is installed as a drive source in the sub-casing 34, a gear 37 is attached to the shaft 6 of the motor 35, and an input gear 21 is attached to the main shaft 22.
A gear mechanism 38 that is interposed and meshed between the two is built-in. Note that 39 is a capacitor for starting the motor 35. The gear mechanism 38 is constituted by a group of gears that are pivotally supported between support plates 40a and 40b fixed in parallel to the sub-casing 34 and have a speed reduction function.

That is, this gear reduction mechanism 38
A large-diameter gear 41 meshed with the gear 37, a small-diameter gear 42 coaxially integrated with this gear 41, and this small-diameter gear 4
2, a small diameter gear 44 that is coaxially integrated with the gear 43, a large diameter gear 45 that is meshed with this small diameter gear 44, a small diameter gear 46 that is coaxially integrated with this gear 45, and a small diameter gear 46 that is coaxially integrated with this gear 45. It is composed of an output gear 47 at the last stage that is meshed with each other.

One or more drive units 33 each including the gear reduction mechanism 38 configured as described above are successively attached to the main casing 11 to drive the main shaft 22.

That is, when the antenna device 1 has a small number of antenna elements 1a and is lightweight, the main shaft 22 is driven by one drive unit 33. In this case, the front opening 34a of the secondary housing 34 is replaced by the side opening 12 of the main housing 11.
Corresponding to b, the last stage output gear 47 of the gear reduction mechanism 38 is meshed with the input gear 21 of the main shaft 22 through the notch window 13c formed on the circumferential surface of the bottomed cylindrical portion 13b of the receiving cylinder body 13, and in this state. The front opening 34a of the secondary casing 34 is fastened and fixed to the side opening 12b of the main casing 11 via their flanges, while the rear opening 34b is closed by the cover plate 50. Note that 51 in the figure is a power connector attached to the lower part of the main casing 1.

In this configuration, the motor 3 of the drive unit 33
When power is supplied to the power circuit 5 through the power connector 51 to drive the motor 35, the gear 37 mounted on the shaft 36 is rotated, and this rotation is caused by the gear reduction mechanism 38.
The transmission is transmitted to the large-diameter gear 41 at the frontmost stage, and sequentially to each of the gears 42 to 46, and the output gear 47 at the last stage is rotated at a reduced speed.This rotation is transmitted to the input gear 2 of the main shaft 22.
1, and the main shaft 22 is rotated. This rotation of the main shaft 22 is transmitted to the internal gear 14 via the intermediate gear 27 meshed with the upper gear portion 22a, and the rotating body 15 is rotated. The rotation of the rotating body 15 rotates the antenna rotating shaft 1b which is attached to the rotating body 15 via the bracket 20, and the direction of the antenna element 1a is changed.

In this way, the rotating body 15 is rotated to change the direction of the antenna element 1a to match the direction of the antenna element 1a. The rotation of the rotating body 15, that is, the direction of rotation of the antenna device 1, is detected by the rotation of the internal gear 14 rotating the operating shaft 29 of the volume 38 via the gear 31. Further, when the rotary body 15 is rotated approximately once in one direction, the protrusion 15a inside the rotary body 15 engages and presses one contact piece 32a of the switch 32, causing the switch 32a to switch and operate the drive unit 33. The motor 35 is driven in reverse to rotate the rotating body 15 in the opposite direction. This rotating body 1
5 is rotated approximately once in the opposite direction, the other contact piece 32
b' is pressed, the switch 32b is operated, and the rotating body 15 is rotated in one direction again.

In this way, the rotating body 15 does not rotate continuously in one direction, and the lead cord of the antenna element 1a of the antenna device 1 does not wrap around the rotating shaft 1b.

Next, when the number of antenna elements 1a of the antenna device 1 is large, the weight of the entire antenna device is large, and a large rotational drive torque is required, the drive unit 33 attached to the side opening 12b of the main housing 11 as described above is used. Connect other drive units to.

That is, after the first drive unit 33 is attached to the side opening 12b of the main housing 11, the last stage output gear 4 of the gear reduction mechanism 38' of the second drive unit 33' is installed.
7' is meshed with the gear 46 that transmits the driving force to the last stage output gear 47 of the gear reduction mechanism 38 of the first drive unit 33, and the second sub casing 34' is moved to the first sub casing. 34 in series with the rear opening 34b.

In this way, by sequentially connecting and meshing the plurality of drive units 33, 33', . Driving becomes possible.

Note that the present application is not limited to the above embodiments, and in the above embodiments, the shape of the main casing 11, the position of the side opening, the gear reduction mechanism 3 of the drive unit 33, etc.
The number of gears 8 and the like may be changed as necessary.

As described above, according to the present application, a plurality of drive units each consisting of a drive section and a gear mechanism are increased or decreased as necessary for a rotating body that rotates the rotation drive device of an antenna device by pivoting the antenna rotation shaft. Since it is configured to be detachably connected in series, there is no need to prepare rotary drive devices with different drive torques for each weight or type of antenna device. In addition, when increasing or decreasing the number of antenna elements in an existing antenna device, the drive torque can be set to match the antenna device by simply increasing or decreasing the drive unit without removing and replacing the rotary drive device. In addition to being very economically advantageous, the drive unit can be attached to and detached from the installed main casing from the outside, making it easy to handle and use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an antenna device equipped with a rotary drive device according to the present application, FIG. 2 is a partially omitted vertical sectional front view of an example of a rotary drive device according to the present application, and FIG. 3 is a line taken along line A-A in FIG. 2. A sectional view, FIG. 4 is a plan view of the gear mechanism inside the rotating body, and FIG. 5 is a plan view of the support plate. In the figure, 11 is the main casing, 12a is the top opening, 12
b is a side opening, 13 is a receiving cylinder body, 14 is an internal gear,
15 is a rotating body, 21 is an input gear, 22 is a main shaft, 2
7a and 27b are intermediate gears, 33 is a drive unit,
34 is a sub-casing, 34a is a front opening, 34b is a rear opening, 35 is a motor, 38 is a gear reduction mechanism,
47 is a final stage output gear.

Claims (1)

[Claims] 1. An input gear which has at least one opening on its circumferential surface and is rotatably equipped with a rotating body on its upper surface to which an antenna device is attached, and inside thereof faces the opening. A main casing body comprising a main shaft having a main shaft and a gear mechanism for transmitting the rotation of the main shaft to the rotary body, and two openings on the side surfaces, and the main casing has two openings at the opening position. Alternatively, a drive source is provided inside the sub-casing which can be attached to each other, and the sub-casing is driven by the driving source and meshes with the input gear through the opening when the sub-casing is attached to the main housing. Alternatively, a rotational drive device for an antenna device comprising a plurality of drive units each having a gear mechanism having gears that mesh and connect with each other through openings when the units are attached to each other. 2. The rotational drive device for an antenna device according to claim 1, wherein the gear mechanism of the drive unit has a deceleration function.