WO2018004038A1

WO2018004038A1 - Pedestal apparatus having low center of rotation

Info

Publication number: WO2018004038A1
Application number: PCT/KR2016/007084
Authority: WO
Inventors: 이현욱; 주현준
Original assignee: (주)인텔리안테크놀로지스
Priority date: 2016-06-30
Filing date: 2016-06-30
Publication date: 2018-01-04
Also published as: KR101802658B1

Abstract

Disclosed is a pedestal apparatus having a low center of rotation. The pedestal apparatus according to one embodiment may comprise: a supporting part disposed on one side of a mobile body; a first link connected to the supporting body by a first joint, and rotatable with respect to the rotational axis of the first joint; a second link connected to the first link by a second joint, rotatable with respect to the rotational axis of the second joint, and having an antenna rotatably attached at one end by a third joint; and a drive unit for controlling the angle between the first link and second link by rotating the second joint, wherein, while the antenna is rotating with respect to the third joint, the third joint can be moved along an axis extending from the first joint.

Description

Pedestal device with low center of rotation

Hereinafter, a pedestal device having a low center of rotation is disclosed.

An antenna provided in a moving body such as a vehicle, a vehicle, or a hull is a device for receiving a signal from a satellite and transmitting a signal to the satellite. Since the antenna receives a signal by tracking a satellite regardless of its position, the antenna is provided with a pedestal device for supporting the antenna so that the signal is not lost due to the shaking of the moving object. That is, the pedestal device supports and fixes the antenna, and may be rotatable so that the antenna transmits and receives a signal from the satellite according to the movement of the moving object.

The antenna may be directed in the range of about -30 ° to about 120 ° relative to the ground, in the range of 0 ° to 120 ° to the bottom of the pedestal unit and to the joint, ie the center of rotation, to which the antenna can be mounted. Since the space of vacant and the reflector and its attachments are placed on top of the pedestal device, the center of gravity of the pedestal device is located on the top, resulting in a structurally low safety factor.

For example, Korean Patent Laid-Open No. 10-2011-0024441 discloses a pedestal device.

An object according to an embodiment is to provide a pedestal device for stably supporting a satellite tracking antenna.

An object according to an embodiment is to provide a pedestal device for stably rotating the antenna by lowering the center of gravity regardless of the antenna shape.

An object according to an embodiment is to provide a pedestal device in which the elevation angle rotation and the rotation center movement is driven in conjunction.

An object according to one embodiment is to provide a pedestal device which lowers the center of gravity of the pedestal device by attaching the main drive or mass to the bottom of the pedestal device.

A pedestal device having a low center of rotation according to an embodiment of the present invention includes a support formed on one side of a moving body, the first link being connected to the support by a first joint, and rotatable about a rotation axis of the first joint. A second link connected to the first link by a second joint, rotatable about a rotation axis of the second joint, and rotatably mounted to one end by a third joint; and the first link and the first link And a drive for adjusting the angle between the two links, wherein the third joint can be moved on an axis extending from the first joint while the antenna rotates with respect to the third joint.

According to one side, the drive unit is disposed on one side of the first link, the induction gear connected to the second joint and the induction gear connected to the induction gear, and includes a drive motor for transmitting power to the induction gear. can do.

According to one side, the drive unit is connected to the drive motor so as to surround the drive shaft of the drive motor, the drive motor rotating portion rotatable about the drive shaft of the drive motor by receiving power from the drive motor, within the drive motor rotating portion A first bevel gear and a second bevel gear coupled to the bevel pinion gear and the bevel pinion gear, the first bevel gear and the second bevel gear, which are engaged with the bevel pinion gear and are rotatable in a rotational direction of the bevel pinion gear. It may include, and the induction gear may be coupled to one side of the first bevel gear or one side of the second bevel gear.

According to one side, the pedestal device may include a first drive belt for transmitting power from the induction gear to the second joint and a second drive belt for transmitting power from the second joint to the third joint. .

According to one side, the support portion may include a guide gear formed along the direction in which the induction gear is engaged with the induction gear.

According to one side, the support portion, may include a receiving groove that the induction gear is accessible.

According to one side, the pedestal device is disposed adjacent to the third joint, connecting the drive plate of the reflector plate rotating motor for transmitting power and the third joint and the reflector plate rotating motor, the third joint from the reflector plate rotating motor And an EL driving belt for transmitting power to the furnace, wherein the driving unit is spaced apart from the second joint in front of the first link and the second link to form an acute angle, and one end of the second driving belt is disposed at the second joint. It may include a linear actuator connected to one side of the link.

A pedestal device having a low center of rotation according to an embodiment includes a support plate, a rotating plate disposed on the support plate, rotatably connected to the support plate, a first link having one end connected to the rotating plate, and the first link. A second link connected to the other end of the first link spaced apart from one end of the second link, the antenna being mounted at one end thereof, an induction gear disposed on one side of the first link and moving up and down; It may include a drive motor disposed on the induction gear in the longitudinal direction and transmits power to the induction gear.

According to one side, the pedestal device is connected to the induction gear, the first spur gear and the first spur gear formed at one end where the first link and the second link is connected, the antenna is mounted It may include a second spur gear formed at one end of the second link.

According to one side, the pedestal device is disposed adjacent to the first link, the first drive belt for connecting the induction gear and the first spur gear and the second link along the longitudinal direction of the second link. It may be disposed adjacent, and may include a second drive belt for connecting the first spur gear and the second spur gear.

According to one side, the rotating plate may include a guide gear of a curved shape to mesh with the induction gear.

According to one side, the rotating plate, on one side may include a receiving groove which the induction gear is accessible as the induction gear moves along the guide gear.

According to one side, the pedestal device is formed on one side of the first link, a gear box to which the induction gear is attached to one side, is disposed on one side of the gear box, the drive shaft of the drive motor A drive motor rotary part connected to the drive motor so as to enclose, extending into the gear box, bevel pinion gears coupled to the drive motor rotation part and accommodated in the gear box, intersecting with the bevel pinion gears and interlocking the bevel pinion gears; It is disposed on both sides of the gear, and may include a bevel gear coupled to the induction gear on one side.

According to one side, the second link may include a plurality of arms respectively coupled to both ends of the second link and a supporting member extending from one side of the plurality of arms, respectively, the second link The link may be formed such that the distance between the plurality of arms increases toward one end in which the antenna is mounted along the length direction of the second link.

According to one or more exemplary embodiments, a pedestal device includes a support formed on one side of a moving body, a linear actuator rotatably connected to one end of the movable body, and an elevation rotating part connected to the other end of the linear actuator and mounted with an antenna. A cross-level rotary motor connected to a high-angle rotary unit and finely adjusting a direction that the antenna is directed to, a reflector rotating motor disposed adjacent to the cross-level rotary motor and adjusting the direction of the antenna and the reflector rotating motor to the high-angle rotating unit It may include an EL drive belt for transmitting power, the high-angle rotating portion can be moved up and down by the linear actuator.

The pedestal device according to one embodiment can stably support the satellite tracking antenna.

The pedestal device according to an embodiment can stably rotate the antenna by lowering the center of gravity regardless of the antenna shape.

In the pedestal device according to an embodiment, the elevation rotation and the rotation center movement may be driven in conjunction.

According to an embodiment, the pedestal device may attach a main drive or mass to the lower part of the pedestal device to lower the center of gravity of the pedestal device, thereby increasing the safety factor against external force acting on the structure supporting the antenna, or maintaining the safety factor similarly. The weight of the structure supporting the antenna can be lowered.

The effect of the pedestal device according to one embodiment is not limited to those mentioned above, other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a schematic perspective view of a pedestal device according to one embodiment.

2 is a rear view showing the back of the pedestal apparatus according to an embodiment.

3 is an enlarged view of a portion of the pedestal apparatus in which the induction gear and the second joint are connected and the driving unit is attached to the induction gear.

4 is a cross-sectional view of a portion where a driving unit is attached to the induction gear viewed from AA ′.

5A to 5D are views illustrating an operation in which elevation rotation and rotation center movement are driven in association with an angle change of an antenna of a pedestal device according to an embodiment.

6 is a perspective view schematically illustrating a pedestal device according to an embodiment when the driving unit is a linear actuator.

7 is a perspective view schematically illustrating a pedestal device according to an embodiment when the driving unit is a linear actuator and no induction gear and guide gear are provided.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiment, when it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

Components included in any one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description in any one embodiment may be applied to other embodiments, and detailed descriptions thereof will be omitted in the overlapping range.

For the pedestal device 10 having a low center of rotation in accordance with one embodiment, for the pedestal device 10 that can be equipped with a satellite tracking antenna to the pedestal device 10 mounted on a moving object such as a ship, for example Although described, the pedestal device 10 may be equipped with a movable body that requires various movements, as well as an antenna.

1 and 2, the pedestal device 10 having a low center of rotation according to an embodiment includes a support part 100 and a first joint 210 formed on one side of a moving body. ) Is connected to the first link 200 by a first link 200 and a second joint 310 that are rotatable about a rotation axis of the first joint 210, and the second joint 310. The second link 300 and the first link 200 and the second link (300) rotatable about the axis of rotation, the antenna 400 is rotatably mounted at one end by a third joint (410) It may include a driver for adjusting the angle between 300).

The support part 100 may be formed on one side of the movable body. The moving object may be a ship, an aircraft, or the like. The support part 100 may include a support plate 110 and a rotating plate 120 disposed on the support plate 110 and rotatably connected to the support plate 110.

The support plate 110 may be disposed on one side of the movable body. In order to mount the pedestal device 100 on the moving body, the support plate 110 may include a fixing groove formed around the support plate 110.

The rotating plate 120 may be disposed on the supporting plate 110, and the rotating plate 120 may be rotatably connected to the supporting plate 110 so that the antenna rotates forward 360 degrees and tracks the satellite. For example, a rotation path may be provided on the support plate 110 so that the rotation plate 120 may rotate, and the rotation plate 120 may be a roller below the rotation plate 120 so as to rotate along the rotation path. It may have a rolling element.

The rotating plate 120 may include a guide gear 122 engaged with the induction gear 230 to be described later and formed along the direction in which the induction gear 230 moves. The guide gear 122 may be disposed on the rotating plate 120. The guide gear 122 may be formed along the direction in which the induction gear 230 to be described later moves, and may be curved to engage the induction gear 230. Since the guide gear 122 has a curved shape, the induction gear 230 can naturally move along the guide gear 122 without inter-gear wear. Guide gear 122 may be a rack gear. When the induction gear 230 to be described later is a pinion gear, the induction gear 230 moves along the guide gear 122 and the pedestal device 10 may operate due to the coupling of the rack gear and the pinion gear.

The support part 100 may include a receiving groove 124 to which the induction gear 230 is accessible. In detail, the receiving groove 124 may be formed on the rotating plate 120, and the induction gear 230 is accommodated as the induction gear 230 meshes with the guide gear 122 and moves along the guide gear 122. The gear box 220 may enter and exit the receiving groove 124.

The first link 200 may be connected to the support part 100 by the first joint 210. The first link 200 may be rotatable about the axis of rotation of the first joint 210. The first joint 210 may be disposed on the rotating plate 120.

The first link 200 may be connected to the first joint 210 disposed on the rotating plate 120 to rotate together with the rotating plate 120. The first link 200 may extend to be angled upward. For example, FIG. 1 illustrates a case where an angle between a normal vector with respect to the surface of the antenna 400 and the support plate 110 is -30 °. In this case, since one end of the antenna 400 may collide with the first link 200, the first link may be formed to be angled upward in a shape such as a boomerang in consideration of the copper wire of the antenna 400. have.

The second link 300 may be connected to the first link 200. In detail, the second link 300 may be connected to the first link 200 by a second joint 310 disposed at one end of the first link 300. The second link 300 may include a third joint 410 so that the antenna 400 may be mounted at one end. The length of the first link 200 and the second link 300 may be the same.

The second link 300 can include a plurality of arms 312. In the plurality of arms 312, both ends of the plurality of arms 312 may be coupled to the second joint 310 and the third joint 410, respectively. As such, the second link 300 may include the plurality of arms 312 to lift the antenna 400 more stably than when lifting the antenna 400 only by one link, The load can also be better tolerated. In addition, the plurality of arms 312 may be connected by the support member 314. The support members 314 may be coupled to extend from one side of the plurality of arms 312, respectively. While the antenna 400 rotates about the axis of rotation of the third joint 410, the stress concentrated on the plurality of arms 312 may be dispersed by the support member 314, thereby stably stating the antenna 400. Can be rotated.

The pedestal device 10 may include a cross level rotary motor 430 capable of finely adjusting a direction in which the antenna is directed. Cross level (CL) refers to orthogonal to the elevation angle in the pedestal device 10 composed of azimuth and elevation, the cross-level rotation motor 430 is orthogonal to the elevation rotation axis and is -30 ° to the left or right It can be driven in the + 30 ° range. The cross-level rotating motor 430 may be connected to one end of the second link 300 on which the antenna is mounted, that is, the third joint 410.

Referring to FIG. 3, a gear box 220 may be formed on one side of the first link 200. The induction gear 230 may be attached to the gear box 220. Due to this, the induction gear 230 can move stably along the guide gear 122, and the gear box 220 can also move with the induction gear 230.

The induction gear 230 may move up and down in engagement with the guide gear 122. In detail, the induction gear 230 may be engaged with the guide gear 122 along the shape of the guide gear 122. In addition, the guide gear 122 may be a gear of a curved shape in order for the induction gear 230 to move fluidly. When the guide gear 122 has a curved shape, the induction gear 230 may move up and down while drawing a curved path.

The pedestal device 10 may include a first spur gear 320 disposed on the second joint 310 and a second spur gear 420 disposed on the third joint 410.

The first spur gear 320 may be connected by the induction gear 230 and the first driving belt 322. The first driving belt 322 may transmit the power transmitted to the induction gear 230 to the first spur gear 320. In addition, the second spur gear 420 may be connected by the second joint 310 and the second driving belt 422. The second driving belt may rotate the antenna 400 by transmitting power transmitted to the second joint 310, that is, power transmitted to the first spur gear 320 to the second spur gear 420. That is, the second spur gear 420 may rotate the reflector provided in the antenna 400.

In addition, the gear ratio of the induction gear 230, the first spur gear 320 and the second spur gear 420 may be adjusted in advance. As a result, power is sequentially transmitted to the first spur gear 320 and the second spur gear 420 as the induction gear 230 moves, and the second joint 310 follows a rear path downward and downward. And the second link 300 can move along a forward and downward circular path, so that the third joint 410 moves downward on the axis extending from the first joint 210 and the elevation center of gravity is lowered. Can be.

The pedestal device 10 is disposed on one side of the first drive pulley 321 and the gear box 220 which are disposed on the second joint 310 so as to face the first spur gear 320 and the first bevel gear to be described later. A second drive pulley 231 coupled to 238a and a power transmission belt 323 connecting the first drive pulley 321 and the second drive pulley 231 may be included. The first driving pulley 321 may be larger than the second driving pulley 231.

As will be described later, the second driving pulley 231 coupled to the first bevel gear 238a may be rotated by driving the drive motor 232, and the second driving pulley 231 may rotate as the second driving pulley 231 rotates. The first driving pulley 321 disposed on the second joint 310 may rotate in the same direction through the power transmission belt 323 connected to the pulley 231. Accordingly, since the second link 300 rotates and moves backward with respect to the second joint 310, the angle between the first link 200 and the second link 300 may be increased, and as a result, The three joints 410, that is, the center of rotation of the elevation may be increased. In addition, the third joint 410 may be located on an axis extending from the first joint 210.

Referring to FIG. 4, a driving motor 232 may be disposed on the gear box 220 to cross one side of the gear box 220. The drive motor 232 is not disposed adjacent to one side of the second link 300 or adjacent to the third joint 410, and is disposed above the gear box 220 attached to the first link 200 which is lower than that. The center of gravity of the pedestal device 10 can be lowered.

A driving motor rotating part 234 for rotating the bevel pinion gear 236 connected to the induction gear 230 may be connected to the driving shaft of the driving motor 232. The driving motor rotating unit 234 may be connected to the driving motor 232 to surround the driving shaft of the driving motor 232. As a result, the driving motor rotating unit 234 may receive power generated from the driving motor 232 as the driving motor 232 rotates, and may rotate about the driving shaft of the driving motor 232.

Bevel pinion gear 236 may be coupled within drive motor rotation 234. A groove may be provided in the driving motor rotating part 234 so that the bevel pinion gear 236 may be coupled, and the bevel pinion gear 236 may be received and coupled to the groove. Bevel pinion gear 236 may correspond to an input that receives power from drive motor 232.

The pedestal device 10 may include a bevel gear 238 corresponding to an output that transfers power from the bevel pinion gear 236 between the bevel pinion gear 236 and the induction gear 230. The bevel gear 238 may include a first bevel gear 238a and a second bevel gear 238b intersecting with the bevel pinion gear 236 and disposed on both sides of the bevel pinion gear 236. The first bevel gear 238a and the second bevel gear 238b may be disposed under the bevel pinion gear 236, and may be rotatable in engagement with the bevel pinion gear 236 to rotate in accordance with the direction of rotation of the bevel pinion gear 236. have. In addition, the induction gear 230 or the second driving pulley 231 described above may be coupled to one side of the first bevel gear 238a or one side of the second bevel gear 238b. Therefore, as the first bevel gear 238a or the second bevel gear 238b rotates, the induction gear 230 and the second driving pulley 231 may also rotate together. Hereinafter, for convenience of description, the second driving pulley 231 is coupled to one side of the first bevel gear 238a, and the induction gear 230 is coupled to one side of the second bevel gear 238b. do.

For example, when the driving motor 232 rotates in the clockwise direction with reference to FIG. 4, power is transmitted from the driving motor 232 to the driving motor rotating part 234 so that the driving motor rotating part 234 rotates in the clockwise direction. have. Thereafter, the bevel pinion gear 236 connected to the driving motor rotating part 234 may drive the first bevel gear 238a connected to one side and the second bevel gear 238b connected to the other side to backward drive. Can be. Accordingly, the induction gear 230 coupled to the second bevel gear 238b rotates according to the rotation direction of the second bevel gear 238b and moves along the guide gear 122 to the second joint 310. ) Is lowered rearward and the height of the third joint 410 is reduced, the center of rotation of the pedestal device 10 can be lowered.

Similarly, when the driving motor 232 rotates in the counterclockwise direction with reference to FIG. 4, power is transmitted from the driving motor 232 to the driving motor rotating part 234 so that the driving motor rotating part 234 rotates in the counterclockwise direction. have. Thereafter, the bevel pinion gear 236 connected to the drive motor rotating unit 234 may drive backward the first bevel gear 238a connected to one side and forward drive the second bevel gear 238b connected to the other side. have. Accordingly, the induction gear 230 coupled to the second bevel gear 238b rotates according to the rotation direction of the second bevel gear 238b and moves along the guide gear 122 to the second joint 310. ) Rises forward and as the height of the third joint 410 increases, the center of rotation of the pedestal device 10 may increase.

In addition, the output gear ratio of the first bevel gear 238a is 1: 1, the output gear ratio of the induction gear 230 is 1: 4, and the gear ratio of the induction gear 230 and the first spur gear 320 is 1: 2 and The gear ratio between the first spur gear 320 and the second spur gear 420 may be 1: 1. In addition, a gear ratio between the first driving pulley 321 disposed on the second joint 310 and the second driving pulley 231 coupled to one side of the first bevel gear 238a may be 1: 2. . However, according to the environment in which the pedestal device 10 is used, the distance that the third joint 410 moves up and down, the length of the first link 200 and the second link 300, and the antenna 400 are provided. The required rotation angle of the reflector may be set differently, and the third joint 410 does not move on the axis extending from the first joint 210, that is, the third joint 410 may be different from the first joint 210. It may not be aligned. Accordingly, the above-described gear ratio and rotation direction may be set differently according to the situation.

FIG. 5A illustrates that the normal vector of the surface of the antenna 400 forms a -30 ° with the support plate 110 in the pedestal device 10, and FIG. 5B illustrates the normal vector of the support plate in the pedestal device 10. FIG. 5C illustrates a state in which the normal vector forms 90 ° with the support plate 110, and FIG. 5D illustrates a state in which the normal vector forms 120 ° with the support plate 110. Illustrated.

5A to 5D, rotation of the antenna at the high angle, that is, rotation of the antenna 400 and movement of the rotation center of the third joint 410 is driven as the angle between the normal vector and the support plate 110 changes. The figure is shown. While the antenna 400 rotates with respect to the third joint 410, the second joint 310 retracts downward toward the support plate 110 and to the rear of the pedestal device 10, in which the antenna is not disposed. In the third joint 410 may move on an axis extending from the first joint 210. In other words, the second joint 310 may move along a path having the length of the first link 200 in a radius, and the first link 200 rotates to simultaneously move the second joint 310. The second link 300 may rotate in a direction opposite to the direction in which the first link 200 rotates.

As the antenna 400 rotates about the axis of rotation of the third joint 410, the center of gravity of the pedestal device 10 rises above the initial state, which results in a large load on the elements fixing the antenna. do. The pedestal device 10 according to an embodiment is powered from the third joint 410 to the second joint and the induction gear 230, and as the induction gear 230 moves along the guide gear 122, 3 results in the center of rotation of the joint 410 descending. For this reason, the antenna 400 can be stably rotated.

Referring to FIG. 6, the driving unit may include a linear actuator 240 having one end connected to one side of the second link 300. In this case, the driving motor 232 may not be provided. The other end of the linear actuator 240 may be connected to one side of the first link 200, but may be connected to the rotating plate 120 without being limited thereto. The linear actuator 240 may adjust the angle between the first link 200 and the second link 300. Therefore, when the second joint 310 moves backwards as the first link 200 rotates with respect to the first joint 210, the linear actuator 240 has a third joint 410 with the first joint ( The angle between the first link 200 and the second link 300 may be adjusted to be smaller so as to move on the axis extending from 210, and thus the center of rotation of the pedestal device 10 may be lowered.

Referring to FIG. 7, when the induction gear 230 and the guide gear 122 and the corresponding gear and pulley structure are not provided, the pedestal device 10 may have a cross-level rotating motor to adjust the direction of the antenna 400. An EL driving belt 442 connecting the reflector plate rotating motor 440 disposed adjacent to the 430 and the second spur gear 420 disposed on the reflector plate rotating motor 440 and the third joint 410 is provided. It may include. Accordingly, rotation at elevation and elevation rotation center movement can be driven separately. In this case, one end of the linear actuator 240 may be hinged on the support 100.

In addition, when the pedestal device 10 includes a linear actuator 240, the pedestal device 10 is connected to the other end of the linear actuator 240, the elevation of the antenna 400 is mounted, connected to the elevation rotation unit And a cross-level rotating motor 430 for fine-adjusting the direction in which the antenna 400 is directed, and a reflector rotating motor 440 disposed adjacent to the cross-level rotating motor 430 and adjusting the direction of the antenna 400. And an EL driving belt 442 for transmitting power from the reflector plate rotating motor 440 to the elevation rotation unit, and the elevation rotation unit may move up and down by the linear actuator 240.

The elevation rotation part may be the third joint 410 described above. In this case, the pedestal device 10 may not include the first link 200 and the second link 300, and the rotation of the reflector and the third joint 410 provided by the antenna by the linear actuator 240. The height adjustment of can be controlled.

The pedestal device 10 according to an embodiment has an advantage of stably supporting a satellite tracking antenna, an advantage of stably rotating the antenna irrespective of the antenna shape, or lowering the weight of a structure supporting the antenna or It has the advantage of increasing the safety factor against external force acting.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the following claims.

Claims

A support formed on one side of the movable body;

A first link connected to the support by a first joint and rotatable about a rotation axis of the first joint;

A second link connected to the first link by a second joint, rotatable about a rotation axis of the second joint, and rotatably mounted at one end by a third joint; And

A driver configured to adjust an angle between the first link and the second link;

Including,

And the third joint is moved on an axis extending from the first joint while the antenna rotates relative to the third joint.
The method of claim 1,

The driving unit,

An induction gear disposed on one side of the first link and connected to the second joint; And

A drive motor connected to the induction gear and transmitting power to the induction gear;

Including, a pedestal device having a low center of rotation.
The method of claim 2,

A first driving pulley disposed on the second joint and rotating the second joint;

A second drive pulley connected to the drive motor to receive power and disposed adjacent to the induction gear; And

A power transmission belt connecting the first driving pulley and the second driving pulley and transferring power from the second driving pulley to the first driving pulley;

Including, a pedestal device having a low center of rotation.
The method of claim 3,

The driving unit,

A driving motor rotating part connected to the driving motor so as to surround the driving shaft of the driving motor, the driving motor rotating part receiving power from the driving motor and rotating about the driving shaft of the driving motor;

A bevel pinion gear coupled to the drive motor rotating part and receiving power from the driving motor rotating part; And

A first bevel gear and a second bevel gear disposed under the bevel pinion gear, the first bevel gear and the second bevel gear meshed with the bevel pinion gear and rotatable according to a rotational direction of the bevel pinion gear;

Including,

Pedestal device having a low center of rotation, the induction gear is coupled to one side of the first bevel gear or one side of the second bevel gear.
The method of claim 4, wherein

A first drive belt transmitting power from the induction gear to the second joint; And

A second drive belt transmitting power from the second joint to the third joint;

Including, a pedestal device having a low center of rotation.
The method of claim 2,

The support portion,

A pedestal device having a low center of rotation, comprising a guide gear meshed with the induction gear and formed along a direction in which the induction gear moves.
The method of claim 1,

A reflector plate rotating motor disposed adjacent to the third joint and transmitting power; And

An EL driving belt connecting the third joint and a drive shaft of the reflector plate rotating motor and transferring power from the reflector plate rotating motor to the third joint;

Including,

The driving unit,

The first link and the second link has a low center of rotation, disposed in the front space forming an acute angle, including a linear actuator, one end connected to one side of the second link Pedestal device.
Support plate;

A rotating plate disposed on the support plate and rotatably connected to the support plate;

A first link having one end connected to the rotating plate;

A second link connected to the other end of the first link spaced apart from one end of the first link and having an antenna mounted at one end thereof;

An induction gear disposed on one side of the first link and moving up and down; And

A drive motor disposed on the induction gear along a length direction of the first link and transmitting power to the induction gear;

Including, a pedestal device having a low center of rotation.
The method of claim 8,

A first spur gear connected to the induction gear and formed at one end to which the first link and the second link are connected; And

A second spur gear connected to the first spur gear and formed at one end of the second link to which the antenna is mounted;

Including, a pedestal device having a low center of rotation.
The method of claim 9,

A first driving belt disposed adjacent to the first link and connecting the induction gear and the first spur gear; And

A second driving belt disposed adjacent to the second link along a length direction of the second link and connecting the first spur gear and the second spur gear;

Including, a pedestal device having a low center of rotation.
The method of claim 10,

The rotating plate, the pedestal device having a low center of rotation comprising a guide gear of a curved shape to engage the induction gear.
The method of claim 11,

The rotating plate, the pedestal device having a low center of rotation, including a receiving groove that the induction gear is accessible as the induction gear moves along the guide gear on one side.
The method of claim 8,

A gear box formed on one side of the first link and to which the induction gear is attached;

A driving motor rotating part disposed on one side of the gear box and connected to the driving motor to surround the driving shaft of the driving motor;

A bevel pinion gear extending into the gear box and coupled within the drive motor rotation; And

A bevel gear received in the gear box, intersecting with the bevel pinion gear, disposed on both sides of the bevel pinion gear, and coupled to the induction gear on one side;

Including, a pedestal device having a low center of rotation.
The method of claim 8,

The second link is,

A plurality of arms respectively coupled to both ends of the second link; And

Support members extending from one side of the plurality of arms and coupled to each other;

Including,

The second link is a pedestal device having a low center of rotation is formed so as to increase the distance between the plurality of arms toward one end in which the antenna is mounted along the longitudinal direction of the second link.
A support formed on one side of the movable body;

A linear actuator rotatably connected at one end to the support;

An elevation rotating part connected to the other end of the linear actuator and mounted with an antenna;

A cross-level rotary motor connected to the elevation rotating part and finely adjusting a direction of the antenna;

A reflection plate rotating motor disposed adjacent to the cross level rotating motor and adjusting a direction of the antenna; And

An EL drive belt for transmitting power from the reflector plate rotating motor to the elevation rotating portion;

Including,

The pedestal device having a low center of rotation, the vertical rotation is moved vertically by the linear actuator.