JP2015130571A - Gimbal device for mounting antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the routing by making a hollow oblique shaft motor and a hollow pivot axis motor, disposed between an antenna adapter provided with an antenna and an interface bracket, guide a transmission cable for antenna, thereby guiding the transmission cable for antenna smoothly.SOLUTION: A hollow oblique shaft motor (50) is provided, while inclining, on a lower cover body (49) provided eccentrically on a hollow pivot axis motor (43) on an interface bracket (40), and a gimbal device for mounting an antenna consists of an antenna adapter (56) having a hollow rotating shaft (59) for holding an antenna (15) via an eccentric upper cover body (55) on the hollow oblique shaft motor (50). A transmission cable (15a) for antenna connected with the antenna (15) is configured to be led out via the antenna adapter (56), the hollow oblique shaft motor (50) and the hollow pivot axis motor (43).

Description

  The present invention relates to an antenna mounting gimbal device, and in particular, has a hollow oblique axis motor and a hollow swivel axis motor provided between an antenna adapter provided with an antenna and an interface bracket guide an antenna transmission cable. The present invention relates to a new improvement for smoothly guiding a transmission cable for use and facilitating routing.

Conventionally used antenna mounts of this type include, for example, the configuration disclosed in Patent Document 1.
That is, FIG. 2 is an explanatory view of the structure principle of the antenna mount 101 used in the quasi-zenith communication satellite antenna of the first embodiment. In the following description, it is assumed that the moving body is a vehicle. In the figure, a biaxial gimbal mechanism 10 is installed on two legs 1 fixed to a vehicle (not shown). The biaxial gimbal mechanism 10 includes an X axis 11 rotatably supported by two legs 1, a bearing frame 12 supported rotatably around the X axis 11, and a horizontal axis 11 on the bearing frame 12. And a Y-axis 13 supported by a Y-bearing provided to be orthogonal to each other. The X axis 11 and the Y axis 13 are disposed in substantially the same plane.

A platform 14 that is rotatably supported around the Y axis 13 is attached to the Y axis 13. FIG. 3 is a cross-sectional explanatory view for explaining the structure of the platform 14. The platform 14 has a plate shape, and an antenna 15 is fixed on one surface thereof so as to be orthogonal to the Y axis 13. The antenna 15 is illustrated as a parabolic shape in the figure, but the form is not limited. A circularly polarized wave having a frequency suitable for communication with the quasi-zenith communication satellite is transmitted and received, and the forward directivity pattern 99 is a relatively broad one of about 20 degrees as shown in FIG. FIG. 3 shows a beam directivity pattern 99 in the ZA axis direction perpendicular to the upper surface of the platform 14 in order to explain the directivity direction of the antenna.
An electric motor 16 (driving means) is attached to the other surface of the platform 14, and a disk 17 (referred to as a frame in the following description) is attached to its shaft. The direction of the rotation axis of the top 17 is perpendicular to the surface of the platform 14 and coincides with the directivity axis of the antenna 15. The electric motor 16 and the top 17 are covered with a cover 18. In FIG. 2, for the sake of explanation, the cover 18 is shown in a removed state.

The center of gravity of the platform 14 is in the center between the bearings supporting the platform, is in a plane including the X axis 11 and the Y axis 13, and is on the axis of the top 17, so that the motor 16 An antenna 15 is arranged.
When the rotational speeds of the electric motor 16 and the top 17 are below a certain level, the gimbal mechanism 110 can be easily moved by hand, so that the antenna 15 can be moved almost vertically upward regardless of the posture of the moving body. In this state, before the moving body starts the engine and the vehicle body is shaken, the motor 16 is energized to rotate the top 17 at a high speed.
The top 17 rotates at a high speed and exhibits a gyro characteristic, and maintains the axial direction before the start of driving. When the motor 16 rotates, the air inside the cover 18 is discharged outside by an air pump (not shown), the air inside the cover 18 becomes lean, the rotational resistance of the top 17 is reduced, and the rotational reaction force received by the motor 16 is also reduced. Even if the platform 14 is subjected to a peristaltic movement, the plane direction is stably held toward the zenith.
Although not shown, the antenna 15 and the antenna mount 101 are entirely covered with a so-called radome so that the direction of the antenna does not shift due to wind when the moving body is traveling.

As described above, the antenna mount 101 includes the biaxial gimbal mechanism 10, the platform 15 supported by the biaxial gimbal mechanism 10, the antenna 15 disposed on the upper surface of the platform 15, and the electric motor attached to the lower surface of the platform 14. 16 and a frame 17 which is driven by the electric motor 16 and whose rotation axis is perpendicular to the surface of the platform 14.
The transmission / reception feed line (not shown) of the antenna 15 and the feed line (not shown) to the motor 16 are connected to the outside via the inside of each axis so as not to prevent the free movement of the biaxial gimbal mechanism 10. ing. Further, the same posture stabilization effect can be obtained with a lighter / smaller piece by driving the piece after speeding up with a gear (not shown) without directly connecting the piece 17 to the shaft of the electric motor 16. An air motor or the like may be used instead of the electric motor 16.
Further, in order to adjust the level of the platform 14 when the motor 16 is stationary, the position of the platform 14 can be adjusted to return to a predetermined position at the periphery of the platform 14 when the motor 16 is lowered while the motor 16 is stopped. A movable weight (adjustment weight, not shown) may be arranged. If such a movable weight is provided, the antenna direction adjustment before activation is automatically processed.
If a so-called plate antenna that is plate-like and light is used for the antenna 15 and a so-called disk motor having a small thickness is used for the motor 16, the overall height of the device can be reduced and the height of the device can be reduced. It can be a portable format.

  The antenna mount 101 of FIG. 2 is stable with an extremely simple structure because the antenna 15 maintains its posture toward the zenith and captures the quasi-zenith communication satellite within the beam width of the antenna 15 without special control. Communication is possible. The gyro will gradually deviate for a long time by receiving slight external forces such as power lines, shaft friction, and disk air resistance, so when the vehicle stops and the engine stops, the motor 16 stops rotating The direction is corrected so that the antenna 15 faces the zenith manually or by gravity (when the above-described movable weight is used), and the motor 16 is started again before the engine is started. As described above, the antenna mount of the first embodiment can suppress the peristaltic movement around the X axis and the Y axis with one frame.

JP-A-9-121112

Since the conventional antenna mount is configured as described above, the following problems exist.
That is, since the platform 14 on which the antenna 15 is placed is supported by a biaxial gimbal, the antenna transmission cable connected to the antenna 15 is in a combined state of bending and twisting due to the movement of the biaxial gimbal. Therefore, the cable is easily attenuated, and the operation of the biaxial gimbal itself is adversely affected.

  The present invention has been made to solve the above-described problems, and in particular, a hollow pivot motor and a hollow for guiding an antenna transmission cable between an antenna adapter provided with an antenna and an interface bracket. It is an object of the present invention to provide an antenna mounting gimbal apparatus that is provided with an oblique axis motor, smoothly guides an antenna transmission cable, and facilitates routing.

  An antenna mounting gimbal device according to the present invention includes a hollow swivel shaft motor provided on an interface bracket, a hollow output shaft provided above the hollow swivel shaft motor and driven by the hollow swivel shaft motor; A lower cover body provided eccentrically on the hollow output shaft, and a hollow provided on the lower cover body, the axial direction of which is inclined in a direction different from the motor axial direction of the hollow turning shaft motor An oblique shaft motor, a hollow oblique output shaft driven by the hollow oblique shaft motor, a trumpet-shaped hollow portion provided in the hollow oblique output shaft and opening upward in a trumpet shape, and the hollow An upper cover body standing upright on the upper part of the oblique output shaft, an antenna adapter provided eccentrically on the upper cover body, and a shaft above the antenna adapter A hollow rotary shaft that is rotatably provided via the second rotary shaft whose direction coincides with the motor shaft direction, and an antenna provided on the hollow rotary shaft, the antenna transmission connected to the antenna The cable is configured to be led out from the interface bracket through the second hollow portion in the hollow rotating shaft, the trumpet-shaped hollow portion, and the first hollow portion of the hollow output shaft.

Since the antenna mounting gimbal apparatus according to the present invention is configured as described above, the following effects can be obtained.
That is, a hollow swivel shaft motor provided on the interface bracket, a hollow output shaft provided above the hollow swivel shaft motor and driven by the hollow swivel shaft motor, and decentered on the hollow output shaft. A lower cover body provided, a hollow oblique shaft motor provided on the lower cover body, the axial direction of which is inclined in a direction different from the motor shaft direction of the hollow turning shaft motor, and the hollow A hollow oblique output shaft driven by an oblique shaft motor, a trumpet-shaped hollow portion provided in the hollow oblique output shaft and opening upward in a trumpet shape, and eccentric to the upper portion of the hollow oblique output shaft An upper cover body that is erected in an upright state, an antenna adapter that is eccentrically provided on the upper cover body, and an upper portion of the antenna adapter that is rotatably provided via a bearing. A hollow rotating shaft whose two axial directions coincide with the motor shaft direction, and an antenna provided on the hollow rotating shaft, and an antenna transmission cable connected to the antenna includes a first rotating shaft in the hollow rotating shaft. The upper cover body in which the hollow rotating shaft horizontally having the antenna is eccentric by being led out from the interface bracket through the two hollow portions, the trumpet-shaped hollow portion, and the first hollow portion of the hollow output shaft And even when tilted and rotated through the lower cover body and the hollow oblique output shaft, the antenna transmission cable is not twisted, and a simple and small-sized gimbal can be obtained without the need for routing.

It is sectional drawing which shows the gimbal apparatus for antenna mounting by this invention. It is a perspective view which shows the conventional antenna mount. FIG. 3 is a detailed explanatory diagram of FIG. 2. FIG. 3 is a beam characteristic diagram of the antenna of FIG. 2.

  An antenna mounting gimbal device according to the present invention includes a hollow swivel shaft motor and a hollow oblique shaft motor for guiding an antenna transmission cable between an antenna adapter provided with an antenna and an interface bracket. Is to facilitate the routing and to reduce the size.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an antenna mounting gimbal device according to the present invention will be described below with reference to the drawings.
Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.
In FIG. 1, what is shown by the code | symbol 40 is the interface bracket which is a base, A pair of connectors 41 and 42 are provided in the side part, The hollow turning axis motor 43 which makes the turning axis A in the upper part is shown. Is provided.

  Inside the motor adapter 44 of the hollow turning shaft motor 43, a hollow output shaft 46 constituting the turning shaft A is rotatably provided via a first bearing 45, and the hollow output shaft 46 includes A first hollow portion 48 formed along the motor shaft direction 47 is formed, and the antenna transmission cable 15a penetrating the first hollow portion 48 can freely move above the first hollow portion 48. It is formed in a taper shape or a trumpet shape.

  On the upper surface of the hollow output shaft 46, a cylindrical lower cover body 49 is provided in an eccentric state with respect to the first hollow portion 48, and the upper surface 49a of the lower cover body 49 is inclined when viewed in cross section. On this inclined upper surface 49a, the motor adapter 50a of the hollow oblique axis motor 50 forming the oblique axis B is provided in an inclined state with respect to the horizontal plane. For example, the motors 43 and 50 are preferably step motors with a rotation detector.

A trumpet-shaped hollow portion 51 a is formed along the first axial direction 52 in the hollow oblique output shaft 51 that is provided at the axial center of the hollow oblique shaft motor 50 and constitutes the oblique axis B.
A guide hole 54 communicating with the trumpet-shaped hollow portion 51a is formed at an eccentric position on the connection plate 53 of the hollow oblique output shaft 51, and is eccentric with respect to the connection plate 53, and A cylindrical upper cover body 55 communicating with the guide hole 54 is provided.

  On the upper surface of the connection plate 53, an upper cover body 55 that is formed in a cylindrical shape in an eccentric state with respect to the connection plate 53 is erected as described above. The upper cover body 55 is cut horizontally in accordance with the inclination of the connection plate 53, and the upper surface 55a of the upper cover body 55 is formed horizontally. On the upper surface 55a, the antenna adapter 56 is placed in a horizontal state. A bearing housing 57 is provided on the antenna adapter 56.

  A hollow rotary shaft 59 is rotatably provided in the bearing housing 57 via a bearing 58, and a disk-shaped antenna base 60 is provided on the hollow rotary shaft 59. The disk-shaped antenna 15 is fixed by bolts 61.

  The antenna transmission cable 15 a connected to the antenna 15 hangs down in the second hollow portion 59 a of the hollow rotary shaft 59 along the second axial direction 62, and passes through the guide hole 54 and the trumpet-shaped hollow portion 53. The first hollow portion 48 is led out through the interface bracket 40.

  Accordingly, when the hollow turning shaft motor 43, the lower cover body 49, the hollow oblique shaft motor 50, and the upper cover body 55 are rotated, a complicated rotation and tilting motion is given to the antenna adapter 56. Since the antenna 15, the antenna base 60, and the hollow rotary shaft 59 to which the tip 15aA of the antenna transmission cable 15a is connected are provided in the bearing housing 57 via the bearing 58, even when the antenna adapter 56 rotates. The antenna 15 does not rotate only by changing its direction, and the antenna transmission cable 49 is not twisted due to rotation. Therefore, the transmission signal gain reduction due to the twist of the antenna transmission cable 15a, which has been conventionally generated ( (Attenuation) does not occur.

  Further, since the first hollow portion 48 of the hollow output shaft 46 and the trumpet-shaped hollow portion 53 of the hollow oblique output shaft 51 are provided, damage to the antenna transmission cable 15a penetrating the inside is prevented. can do.

  Since the antenna mounting gimbal device according to the present invention rotates the antenna base having the antenna by combining the turning axis motor and the oblique axis motor, it is possible to obtain a configuration that is small and lightweight and does not damage the transmission cable. It is possible to rotate other objects.

DESCRIPTION OF SYMBOLS 10 Gimbal apparatus 15 Antenna 15a Antenna transmission cable 15aA Tip 40 Interface bracket 41, 42 Connector 43 Hollow turning shaft motor 44 Motor adapter 45 First bearing 46 Hollow output shaft 47 Motor axial direction 48 First hollow portion 49 Lower cover body 49a Upper surface 50 Hollow oblique shaft motor 50a Motor adapter 51 Hollow oblique output shaft 51a Trumpet-shaped hollow portion 52 First axial direction 53 Trumpet-shaped hollow shaft 54 Guide hole 55 Upper cover body 55a Upper surface 56 Antenna adapter 57 Bearing housing 58 Bearing 59 Hollow rotating shaft 59a Second hollow portion 60 Antenna base 61 Bolt 62 Second axis direction A Rotating axis B Oblique axis

Claims (1)

A hollow turning shaft motor (43) provided on the interface bracket (40), and a hollow output shaft provided above the hollow turning shaft motor (43) and driven by the hollow turning shaft motor (43). (46), a lower cover body (49) provided eccentrically on the hollow output shaft (46), and an axial direction of the lower cover body (49) provided on the lower cover body (49). A hollow oblique shaft motor (50) disposed to be inclined in a direction different from the motor shaft direction (47), and a hollow oblique output shaft (51) driven by the hollow oblique shaft motor (50). And a trumpet-shaped hollow portion (53) provided in the hollow oblique output shaft (51) and opening upward in a trumpet shape, and an upper portion of the hollow oblique output shaft (51) in an eccentric state. An upper cover body (55) provided, an antenna adapter (56) eccentrically provided on the upper cover body (55), and the antenna adapter (56 ) And a hollow rotary shaft (59) whose second axial direction (62) coincides with the motor axial direction ((47)) and a hollow rotary shaft (59 An antenna (15) provided on the
The antenna transmission cable (15a) connected to the antenna (15) includes a second hollow portion (59a) in the hollow rotary shaft (59), the trumpet-shaped hollow portion (53), and the hollow output shaft (46). The antenna mounting gimbal device is led out from the interface bracket (40) through the first hollow portion (48).

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