Clamping device for antenna

Abstract

The present invention relates to a clamping device for an antenna, and more particularly, to a clamping device for an antenna, comprising: a fixed bracket part disposed above and below a derrick so as to intervene in mounting an antenna device to the derrick; an antenna mounting bracket which is inserted into a front mounting antenna device; the steering driving unit is connected to the fixed bracket part and is used for driving to steer and rotate the antenna equipment; and a tilt driving unit having an upper end hinged to the steering driving unit and a lower end hinged to a rear upper end of the antenna mounting bracket through a pair of tilt connecting members, the tilt driving unit being driven to tilt and rotate the antenna device. The clamping device for the antenna further comprises a backlash reduction design shape for reducing the generation of mechanical backlash noise caused by an eccentric load of the antenna device, thereby providing the advantage of being able to suppress backlash noise.

Description

Technical Field

[0001] The present invention relates to a clamping device for an antenna, and more particularly, to a clamping device for an antenna as follows: not only can the antenna device be effectively configured in a dense installation space, but the direction of the antenna device can also be easily adjusted, and the interference generated when the direction is adjusted due to the size of the antenna device can be minimized, and the generation of noise such as tooth gap noise can be minimized when the direction of the antenna device is adjusted. Background Art

[0002] Generally, wireless communication technologies, such as MIMO (Multiple Input Multiple Output) technology, are technologies that use multiple antennas to greatly increase data transmission capacity. It is a spatial multiplexing technology in which a transmitter sends different data through each transmitting antenna, and a receiver distinguishes the transmitted data through appropriate signal processing.

[0003] Thus, increasing the number of transmitting and receiving antennas while increasing the channel capacity can send more data. For example, if the number of antennas is increased to 10, compared to the current single antenna system, using the same frequency band will ensure about 10 times the channel capacity.

[0004] In the evolution of 4G LTE, up to 8 antennas are used. Currently, products with 64 or 128 antennas installed in the pre-5G stage are on the market. Currently, base station equipment with more antennas is being developed for 5G, which is called massive MIMO technology. In the past, cell operations were two-dimensional, but in contrast, the introduction of massive MIMO technology can achieve 3D-beamforming, so it is preferably called FD (full-dimensional)-MIMO.

[0005] In massive MIMO technology, the number of transmitters and filters increases as the number of ANTs (antennas) increases. However, the reality is that RF components (antennas / filters / power amplifiers / receivers, etc.) are made smaller, lighter, and cheaper due to rental costs or space limitations at the installation site. Massive MIMO requires high power to expand coverage, but the power consumption and heat generated by this high power have a negative effect on reducing weight and size.

[0006] In particular, when installing a MIMO antenna that is a module that combines RF components and digital components in a stacked structure in a limited space, in order to maximize the ease of installation and space utilization, it is necessary to compact and miniaturize the multi-layer structure that constitutes the MIMO antenna, and there is a strong demand for the need to freely adjust the direction of the antenna device set on a pole. In response to the above requirements, Korean Patent Gazette No. 10-2095871 (Announcement 2020.04.02) (hereinafter referred to as "the prior art") discloses an antenna clamping device having a tilting unit and a steering unit, wherein the tilting unit is used to rotate the antenna device in the up and down direction, and the steering unit is used to rotate the antenna device in the left and right direction.

[0007] However, the related art has a problem that the tilting unit has a small range for rotating the antenna device in the up and down directions.

[0008] Furthermore, it has been pointed out that whenever the direction of the somewhat heavy antenna device is adjusted by tilting or swivel rotation, the problem of backlash noise often occurs in the gear connections connected to enable the tilting and swivel rotation. Summary of the invention

[0009] (Problem to be solved)

[0010] The present invention is proposed to solve the above technical problems, and its purpose is to provide an antenna clamping device that can tilt the antenna device in the vertical direction and turn it in the left and right directions at the same time, and can maximize the rotation range in each direction.

[0011] At the same time, another object of the present invention is to provide an antenna clamping device that allows users to selectively equip the connecting rod assembly according to the number of antenna devices installed on the holding pole and the installation space.

[0012] In addition, another object of the present invention is to provide a clamping device for an antenna as follows: in order to enable tilting and turning of the antenna equipment, which is a relatively heavy piece, when adjusting the direction of the antenna, each connection part can be realized by tilting and turning, thereby preventing mechanical gap noise from being generated from each connection part.

[0013] Then, another object of the present invention is to provide the following antenna clamping device: the antenna devices can be densely arranged, and two turning points are formed based on the antenna mounting bracket, thereby realizing a miniaturized product design.

[0014] The subjects of the present invention are not limited to the subjects mentioned above, and other subjects not mentioned can be clearly understood by those skilled in the art to which the present invention belongs from the following description.

[0015] (Methods to solve the problem)

[0016] An antenna clamping device according to an embodiment of the present invention comprises: a fixed bracket part, arranged above and below a pole, to intervene in mounting an antenna device on the pole; an antenna mounting bracket, to intervene in mounting the antenna device in front; a steering drive unit, connected to the fixed bracket part, and driven to steer and rotate the antenna device; and a tilting drive unit, the upper end of which is hingedly connected to the steering drive unit, and the lower end of which is hingedly connected to the rear upper end of the antenna mounting bracket through a pair of tilting connection parts, and driven to tilt and rotate the antenna device. The antenna clamping device also includes a backlash reduction design shape for reducing the generation of mechanical backlash noise caused by the eccentric load of the antenna device.

[0017] Here, the fixed bracket part may include an upper fixed bracket part and a lower fixed bracket part, the upper fixed bracket part is installed on the holding pole, and the lower fixed bracket part is installed on the holding pole and configured at the lower part of the upper fixed bracket part.

[0018] In addition, the backlash reduction design shape is that the installation rotating block can be configured as an inclined surface, and the installation rotating block is hingedly connected to the lower supporting bracket part corresponding to the lower fixed bracket part arranged on the holding pole so that it can be tilted, rotated and turned.

[0019] In addition, the backlash reduction design shape may have a trapezoidal cross-section including the inclined surface, wherein the inclined surface at least contacts the steering hinge bushing, and the steering hinge bushing is interposed between the steering hinge mounting groove configured at the hinge connection point of the mounting rotating block and the inserted steering hinge.

[0020] In addition, the steering hinge mounting groove is such that the upper and lower sides can be processed into open groove shapes respectively, so that the upper steering hinge and the lower steering hinge can be inserted through the upper vertical axis mounting portion and the lower vertical axis mounting portion formed on the lower support bracket portion.

[0021] In addition, the mounting rotating block includes: a rotating block body, the rear end of which is hingedly connected to the lower support bracket part, and the front end of which is hingedly connected to the rear lower end of the antenna mounting bracket; and a steering hinge cover, which is combined with the side surface of the rear end of the rotating block body. When the steering hinge cover is combined with the rotating block body, the steering hinge mounting groove can be formed so that the inner side surface has a circular cross-section.

[0022] In addition, the tooth clearance reduction design shape can have a trapezoidal cross-section including the inclined surface, and the inclined surface at least contacts the inclined hinge bushing, and the inclined hinge bushing is intervened between the inclined hinge mounting groove configured at the hinge connection point of the mounting rotating block and the inserted inclined hinge.

[0023] In addition, the tilt hinge installation groove can be processed into a groove shape that opens toward one side and the other side respectively, so that the tilt hinge on one side and the tilt hinge on the other side can be intervened by the lower horizontal bracket arranged at the lower end of the antenna installation bracket.

[0024] In addition, the mounting rotating block includes: a rotating block body, the rear end of which is hingedly connected to the lower support bracket, and the front end of which is hingedly connected to the rear lower end of the antenna mounting bracket; and a tilt hinge cover, which is combined with the lower front end of the rotating block body. The tilt hinge mounting groove is formed so that the inner side surface has a circular cross-section when the rotating block body is combined with the tilt hinge cover.

[0025] In addition, the tooth clearance reduction design shape is that a matching part on one side is formed at both ends of the tilting shaft of the tilting drive unit and a matching part on the other side is formed at the end of the tilting connecting part combined with the tilting shaft, and the tooth surface that is stuck in the rotation direction includes a trapezoidal cross-section with an inclined surface.

[0026] In addition, the tooth clearance reduction design shape is that a matching part on one side is formed at both ends of the steering shaft of the steering drive unit and a matching part on the other side is formed on the upper supporting bracket part, which can have a trapezoidal cross-section with a tooth surface stuck in the rotation direction including an inclined surface, wherein the upper supporting bracket part corresponds to the upper fixed bracket part and is arranged on the holding rod to combine with the steering shaft.

[0027] In addition, the tooth clearance reduction design shape is configured so that the tilt damper between the inner side surface of the tilt drive part shell of the tilt drive unit and the tilt drive motor and the damper between the inner side surface of the steering upper shell of the steering drive unit and the steering drive motor can respectively include inclined surfaces that interfere with the tilting rotation direction or the steering rotation direction.

[0028] In addition, the steering drive unit includes: an electrically driven steering drive motor; a steering shaft, which is vertically arranged up and down; and a transmission gear assembly, which receives driving force from the steering drive motor and transmits it to the steering shaft; wherein the transmission gear in the transmission gear assembly that engages with the steering shaft can be configured to be tilted forward or backward at a predetermined angle to prevent a tilted rotation direction that is orthogonal to the front and rear direction of the antenna device.

[0029] (Effects of the Invention)

[0030] According to an embodiment of the present invention, the antenna clamping device can achieve the following effects:

[0031] First, the user can selectively equip the clamping device of the connecting rod assembly according to the number of antenna devices installed on the holding pole and the installation space, thereby maximizing the installation convenience and space utilization of the holding pole.

[0032] Secondly, in order to adjust the antenna direction, including the tilting and turning of the antenna device which is a relatively heavy piece, each connection part can be realized by tilting and turning, which has the effect of blocking the mechanical gap noise generated from each connection part.

[0033] Third, the antenna devices can be densely arranged to form two turning points based on the antenna mounting bracket, thereby realizing a miniaturized product design. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1a and Figure 1b 1. It is a front and rear perspective view showing the installation form of the antenna device installed on the pole using the antenna clamping device according to one embodiment of the present invention;

[0035] Figure 2a and Figure 2b 1 is a perspective view showing the front and rear parts of a clamping device for an antenna according to an embodiment of the present invention;

[0036] Figure 3a and Figure 3b As Figure 2a and Figure 2b The exploded perspective view of each is shown in Figure 2a and Figure 2b An exploded perspective view of a combination of a tilt drive unit and a steering drive unit combined with an antenna mounting bracket in a structure;

[0037] Figure 4a and Figure 4b yes Figure 2a and Figure 2b Exploded perspective views of each specific part;

[0038] Figure 5a and Figure 5b It is shown in Figure 2a and Figure 2b A side view and a plan view of the antenna device installation state when the connecting rod assembly is not used in the structure and when the connecting rod assembly is used;

[0039] Figure 5c It is along Figure 5a (b) a cross-sectional view taken along the BB line;

[0040] Figure 6 is a partially cutaway perspective view showing the installation form of a detachable clamping gear panel clamped on the outer peripheral surface of the holding pole in the structure of FIG. 1 ;

[0041] Figure 7 is Figure 4a and Figure 4b An exploded perspective view of a structure in which the lower end of the antenna mounting bracket part is decomposed from the pole-side mounting bracket part and the mounting rotating block involved in the connection;

[0042] Figure 8a and Figure 8b is Figure 7 The front and rear parts of the structure are exploded in a three-dimensional diagram of the installation rotating block;

[0043] Fig. 9 It is used to illustrate Figure 8a and Figure 8b A vertical cross-sectional view of a portion of a connection portion of a structure in which an anti-backlash bushing functions;

[0044] Fig.10a and Fig.10b An exploded perspective view showing the left and right sides of a tilt drive unit and a steering drive unit in the structure of the antenna clamping device according to one embodiment of the present invention;

[0045] Fig.11a and Fig.11b 1. It is an exploded perspective view of one side and the other side showing the connection relationship between the tilting drive unit, the steering drive unit and the tilting connection member in the structure of the antenna clamping device according to one embodiment of the present invention;

[0046] Fig.12 yes Fig.11a Detailed exploded perspective view of

[0047] Fig.13a and Fig.13b 1 is an exploded perspective view showing one side and the other side of a tilt driving unit in the structure of the antenna clamping device according to one embodiment of the present invention;

[0048] Fig.14 is an exploded perspective view of a steering drive unit in the structure of an antenna clamping device according to an embodiment of the present invention;

[0049] Fig.15 It is shown Fig.14 A three-dimensional view of the transmission gear assembly in a state where the gear housing is removed in the structure;

[0050] Fig.16 is Fig.14 A plan view of a state in which an upper housing of a steering unit is removed from the structure;

[0051] Fig.17This is a perspective view showing a state in which the direction of an antenna device is set by tilting and / or turning the antenna device using the antenna clamping device according to one embodiment of the present invention.

[0052] (Explanation of Reference Numerals)

[0053] P: Pole A: Antenna equipment

[0054] 1: Antenna clamp 50A: Upper fixing bracket

[0055] 50B: Lower fixed bracket 60: Connecting rod assembly

[0056] 61A, 61B: front and rear horizontal bars 63: left and right horizontal bars

[0057] 65: Bolt fastening hole 67: Clamping gear panel

[0058] 69: Gear panel fixing bolt 70: Vertical support frame

[0059] 80A: upper support bracket part 80B: lower support bracket part

[0060] 81A: Upper vertical shaft mounting portion 81B: Lower vertical shaft mounting portion

[0061] 82: Steering hinge connecting bolt 83: Matching part on the other side

[0062] 90: Antenna mounting bracket 91: Base plate

[0063] 92: Diagonal mounting portion 93: Additional bolt fastening hole

[0064] 94: Mounting expansion portion 95: Multiple bolt through holes

[0065] 96: Antenna mounting fastening hole 97: Antenna fastening bolt

[0066] 98U: Upper horizontal bracket 98D: Lower horizontal bracket

[0067] 99U: Upper hinge connection end 99D: Lower hinge connection end

[0068] 100: Tilt drive unit 110: Tilt drive housing

[0069] 120: Tilt drive unit housing cover 130: Tilt drive unit

[0070] 140: tilt axis 143: one side matching part

[0071] 145: Bolt fastening hole 150: Tilt drive motor

[0072] 160: Transmission gear assembly 180: Unit setting frame

[0073] 200: Steering drive unit 210: Steering lower housing

[0074] 220: Steering upper housing 230: Steering drive unit

[0075] 240: Steering shaft 243: One side matching part

[0076] 245: Bolt fastening hole 250: Steering drive motor

[0077] 260: Transmission gear assembly 300A, 300B: Inclined connection member

[0078] 303: The other side matching part 305: Connecting assembly bolt

[0079] 400: Install the rotating block 410: Rotate the block

[0080] 420: Steering hinge cover 425A, 425B: Steering hinge mounting slot

[0081] 435A, 435B: Tilt hinge mounting slot 440L-1: Tilt hinge on one side

[0082] 440R-1: Tilt hinge on the other side 440L-2: Tilt hinge bushing on one side

[0083] 440R-2: The other side tilt hinge bushing 450U-1: The upper steering hinge

[0084] 450D-1: Lower steering hinge 450U-2: Upper steering hinge bushing

[0085] 450D-2: Lower steering hinge bushing 500: Steering damper

[0086] 510: Mounting washer 520: Lower damper

[0087] 530: Upper damper DETAILED DESCRIPTION

[0088] Hereinafter, a clamping device for an antenna according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0089] When assigning reference numerals to components of the various drawings, it should be noted that for identical components, even if shown in different drawings, they should have the same reference numerals as much as possible. In addition, when describing the embodiments of the present invention, if it is determined that the specific description of the relevant known structure or function hinders the understanding of the embodiments of the present invention, the specific description will be omitted.

[0090] When describing the components of the embodiments of the present invention, the terms first, second, A, B, (a), (b), etc. may be used. Such terms are only used to distinguish one component from other components, and the nature or order of the components shall not be limited by the terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by ordinary technicians in the field to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as consistent with the meaning in the relevant technical articles and shall not be interpreted in an ideal or overly formal sense unless clearly defined in this application.

[0091] Figure 1a and Figure 1b 1. It is a front and rear perspective view showing the installation form of the antenna device installed on the pole using the antenna clamping device according to one embodiment of the present invention; Figure 2a and Figure 2b 1 is a perspective view showing the front and rear parts of a clamping device for an antenna according to an embodiment of the present invention; Figure 3a and Figure 3b As Figure 2a and Figure 2b The exploded perspective view of each is shown in Figure 2a and Figure 2b An exploded perspective view of a combination of a tilt drive unit and a steering drive unit combined with an antenna mounting bracket in a structure; Figure 4a and Figure 4b yes Figure 2a and Figure 2b Exploded perspective views of each specific part; Figure 5a and Figure 5b It is shown in Figure 2a and Figure 2b A side view and a plan view of the antenna device installation state when the connecting rod assembly is not used in the structure and when the connecting rod assembly is used; Figure 5c It is along Figure 5a (b) a cross-sectional view taken along the BB line; Figure 6 It is a partially cutaway perspective view showing the installation form of a detachable clamping gear panel clamped on the outer peripheral surface of the holding pole in the structure of FIG. 1 .

[0092] like Figures 1a to 6 As shown, the antenna clamping device 1 of one embodiment of the present invention is to simultaneously intervene in the installation of the antenna device A on the pole P and perform specific direction setting for the pole P in a fixed state to meet the beamforming design of the frequency beam oscillating through the antenna device A.

[0093] In more detail, Figure 1a and Figure 1bAs shown, by means of the pole mounting bracket parts 50A, 50B, 80A, 80B installed around the outer peripheral surface of the pole P, the antenna clamping device 1 of an embodiment of the present invention can be combined with a predetermined distance in the horizontal direction, so that the antenna clamping device 1 is set in a cantilever shape with respect to the length direction of the vertically configured pole P.

[0094] Here, the pole mounting bracket parts 50A, 50B, 80A, 80B may include: fixed bracket parts 50A, 50B, which are arranged above and below the pole P to intervene in the installation of the antenna device A on the pole P; and supporting bracket parts 80A, 80B, which are fixed and installed on the pole P corresponding to the fixed bracket parts 50A. The specific structures and functions of the fixed bracket parts 50A, 50B and the supporting bracket parts 80A, 80B will be described in more detail later.

[0095] For the clamping device 1 realized by the embodiment of the present invention, for the sake of ease of understanding, the installation and application of the antenna device A is illustrated as an example, but it should be understood that in addition to the antenna device A, the installation of LED lighting devices, high-power sports lighting and other lighting fixtures (not shown) on the pole P and the like are all included.

[0096] If the clamping device 1 implemented by the embodiment of the present invention is used to install lighting fixtures waiting to be installed in a sports arena, the lighting fixtures can be tilted and / or turned in the direction desired by the user.

[0097] Reference Figure 1a and Figure 1b The antenna clamping device 1 according to an embodiment of the present invention can be configured such that the antenna device A is spaced a predetermined distance from the pole P by adjusting the installation distance of the antenna device A through the connecting rod assembly 60 .

[0098] like Figure 5a to Figure 5c As shown, the connecting rod assembly 60 can be selectively equipped according to whether the antenna device A is set at intervals with the pole P. When the connecting rod assembly 60 is not needed and the antenna device A is relatively tightly combined with the outer peripheral surface of the pole P, only the components equivalent to the connecting rod assembly 60 can be disassembled and removed. When the connecting rod assembly 60 is removed, the clamping gear panel 67 configured on the left and right horizontal rods 63 described later is directly installed on the upper support bracket part 80A and the lower support bracket part 80B described later, and then the outer peripheral surface of the pole P is directly clamped, and the pole fixing bolts 52 described later that are fastened to the upper fixing bracket part 50A and the lower fixing bracket part 50B can be directly fastened to the upper support bracket part 80A and the lower support bracket part 80B.

[0099] Figure 1a and Figure 1b An embodiment of the connecting rod assembly 60 described above is shown. Figure 5aand Figure 5b (a) shows an embodiment in which the connecting rod assembly 60 is deleted.

[0100] Here, the connecting rod assembly 60 may include an upper connecting rod assembly (not marked with a reference numeral) and a lower connecting rod assembly (not marked with a reference numeral), wherein the upper connecting rod assembly is arranged at a height corresponding to the upper fixed bracket portion 50A described above, and the lower connecting rod assembly is arranged at a height corresponding to the lower fixed bracket portion 50B. The upper connecting rod assembly and the lower connecting rod assembly are only arranged at different positions, and the structures are all the same, so they are not given separate reference numerals, and the description of any one of the upper connecting rod assembly and the lower connecting rod assembly can replace the description of the remaining one.

[0101] On the other hand, the connecting rod assembly 60 may include: a pair of front and rear horizontal rods 61A, 61B, extending horizontally toward the left and right ends of the upper fixed bracket part 50A and the lower fixed bracket part 50B; left and right horizontal rods 63, configured in the left and right horizontal directions to connect the rear ends of the pair of front and rear horizontal rods 61A, 61B.

[0102] Although the connecting rod assembly 60 as described above is not individually marked with a figure mark, it can be composed of a pair of an upper assembly 60A and a lower assembly 60B, and the upper assembly 60A and the lower assembly 60B are configured to correspond to the upper fixed bracket part 50A configured to surround one side of the outer peripheral surface of the holding pole P and the lower fixed bracket part 50B configured to surround the other side of the outer peripheral surface of the holding pole P.

[0103] At the same time, if Figure 2a and Figure 2b As shown, the connecting rod assembly 60 is connected to the pole P in the following manner: a pair of front and rear horizontal rods 61A and 61B penetrate the left and right horizontal rods 63 and extend to the upper fixing bracket part 50A and the lower fixing bracket part 50B of the pole P by a predetermined length, and the pole fixing bolts 52 (see FIG. 5 ) inserted from the upper fixing bracket part 50A and the lower fixing bracket part 50B are penetrated and inserted. Figure 5c ) are respectively fastened to the bolt fastening holes 65 at the rear ends of a pair of front and rear horizontal rods 61A and 61B. Figure 5c As shown, fixing the front end portions of a pair of front and rear horizontal rods 61A and 61B to the left and right horizontal rods 63 can be achieved by using support bracket fastening bolts 62 that simultaneously penetrate the upper support bracket portion 80A and the lower support bracket portion 80B described later.

[0104] Here, if Figure 2a and Figure 2b As shown, there is a narrow slot type gear panel mounting groove 85 (see FIG. Figure 6), a clamping gear panel 67 in which multiple gear teeth are arranged in a "V" shape can be fixed in the gear panel mounting groove 85 to clamp the outer peripheral surface of the holding rod P to prevent slipping.

[0105] Here, the clamp gear panel 67 is not necessarily formed in a "V" shape, but tends to be as close as possible to the outer peripheral surface of the pole P. When the clamp gear panel 67 is in a "V" shape, it has the advantage of being applicable to poles P having various outer diameters.

[0106] The clamping gear panel 67 is not necessarily configured only on the left and right horizontal rods 63, but can be directly arranged on the holding rod P without the connecting rod assembly 60, such as Figure 6 As shown, it may be provided on the inner side surfaces of the upper support bracket portion 80A and the lower support bracket portion 80B described later.

[0107] In this case, if Figure 6 As shown, after the clamping gear panel 67 is inserted into the gear panel mounting groove 85, the outer cross-section of the middle part where the gear teeth are not formed matches the outer side surface of the upper support bracket part 80A and the lower support bracket part 80B, and a bolt fixing hole 87 is formed adjacent to the upper or lower part of the outer cross-section where the gear teeth are not formed of the clamping gear panel 67, and the clamping gear panel 67 can be fixed by the gear panel fixing bolt 69 fastened in the bolt fixing hole 87. At this time, the gear panel fixing bolt 69 is a step surface of the head 69B formed with a diameter larger than that of the main body 69A when the main body 69A is inserted and fastened in the bolt fixing hole 87, and overlaps with the outer cross-section where the gear teeth are not formed of the clamping gear panel 67, thereby preventing the clamping gear panel 67 from being separated from the gear panel mounting groove 85.

[0108] On the other hand, Figure 3a and Figure 3b As shown, an upper support bracket portion 80A and a lower support bracket portion 80B may be disposed at the front end portions of a pair of front and rear horizontal rods 61A and 61B of the connecting rod assembly 60 .

[0109] The method for combining the upper support bracket portion 80A and the lower support bracket portion 80B with the front end portion of a pair of front and rear horizontal rods 61A and 61B is the same as described above, except for the difference in whether to use the holding rod fixing bolts 52 or only use the support bracket fastening bolts 62. This is the same as the method for combining the upper fixed bracket portion 50A and the lower fixed bracket portion 50B with the rear end portion of a pair of front and rear horizontal rods 61A and 61B, so the specific description is omitted.

[0110] like Figure 3a and Figure 3bAs shown, both left and right ends of the upper support bracket portion 80A and the lower support bracket portion 80B are firmly connected by a pair of vertical support frames 70 arranged in the vertical direction.

[0111] The vertical support frame 70 can simultaneously connect and fix the front end portions of a pair of front and rear horizontal rods 61A and 61B in the structure of the upper assembly 60A and the lower assembly 60B of the connecting rod assembly 60 in the vertical direction.

[0112] Here, the vertical support frame 70 has a roughly "∟"-shaped horizontal cross-section to simultaneously support the side end faces and rear end faces of the upper support bracket portion 80A and the lower support bracket portion 80B, and the portion supporting the rear end faces of the upper support bracket portion 80A and the lower support bracket portion 80B can be supported by the front end portions of the above-mentioned pair of front and rear horizontal rods 61A, 61B passing through.

[0113] As described above, the upper support bracket portion 80A and the lower support bracket portion 80B are respectively arranged at independent positions spaced apart in the vertical direction along the length direction of the holding pole P, but a rectangular hexahedron-shaped frame structure is formed by adding a pair of vertical support frames 70. Through this structure, the upper support bracket portion 80A and the lower support bracket portion 80B can be maintained firmly and stably connected to prevent gaps from being formed in the left and right directions and the front and rear directions.

[0114] Therefore, when the antenna device A as a heavy component is driven by the tilt drive unit 100 and the steering drive unit 200 to be described later to tilt and rotate in the front-rear direction and in the left-right direction, mechanical backlash noise caused by physical assembly tolerance can be prevented.

[0115] like Figure 3a and Figure 3b As shown, the upper support bracket portion 80A and the lower support bracket portion 80B may have an upper vertical axis mounting portion 81A and a lower vertical axis mounting portion 81B protruding forward to provide two turning points S1 and S2 required for the antenna device A to turn.

[0116] The upper vertical shaft mounting parts 81A may be configured as a pair at the upper and lower sides, and a blank space may be formed in the middle. The blank space between the pair of upper vertical shaft mounting parts 81A may be inserted and connected to the steering shaft 240 in the structure of the steering drive unit 200 described later.

[0117] The lower vertical shaft mounting parts 81B are also configured to be a pair of protruding parts at the upper and lower parts, and the middle part can be formed as a blank space. The blank space between the pair of lower vertical shaft mounting parts 81B can be inserted and connected to the rear end of the mounting rotating block 400 described later.

[0118] In more detail, Figure 4aand Figure 4b As shown, the upper vertical shaft mounting portion 81A and the lower vertical shaft mounting portion 81B provide two steering rotation points S1 and S2, and can be provided so that the center of the steering shaft 240 of the steering drive unit 200 and the hinge connection point for mounting the rotating block 400 are located on the same vertical line in the vertical direction.

[0119] On the other hand, Figure 4a and Figure 4b As shown, at the lower part of the steering drive unit 200, a unit connecting hinge 117 (see later described) is connected. Figures 11a to 12 ) can be hingedly connected to the tilt driving unit 100.

[0120] The hinged connection between the steering drive unit 200 and the tilting drive unit 100 means that when the upper end of the antenna mounting bracket 90 arranged in the front for installation of the intervention antenna device A is tilted and rotated, the tilting drive unit 100 is also tilted and rotated relative to the steering drive unit 200 in a relatively fixed state within a predetermined angle range.

[0121] At the same time, if Figure 4a and Figure 4b As shown, the tilt drive unit 100 is connected to the steering drive unit 200 and the antenna mounting bracket 90 to have at least three tilt rotation points T1, T2, and T3.

[0122] The tilt rotation point indicated by “ T1 ” (hereinafter referred to as “ T1 rotation point”) refers to the axial direction of the tilt shaft 140 in the structure of the tilt drive unit 100 , and is the rotation center point of the tilt connection components 300A and 300B described later connected to the tilt shaft 140 .

[0123] Meanwhile, the tilt rotation point indicated by "T2" (hereinafter referred to as "T2 rotation point") includes a rotation path drawn by the other end of the tilt connection member 300A, 300B connected to the T1 rotation point, and may be a rotation radius drawn by the upper end of the antenna mounting bracket 90 connected to the other end of the tilt connection member 300A, 300B. Here, the rotation radius of the upper end of the antenna mounting bracket 90 may refer to the tilt path of the antenna device A.

[0124] On the other hand, the tilt rotation point indicated by "T3" (hereinafter, referred to as "T3 rotation point") may be a hinge connection point using the unit connection hinge 117 between the tilt drive unit 100 and the steering drive unit 200. The unit connection hinge 117 may be a structure that allows the tilt drive unit 100 to freely rotate relative to the steering drive unit 200.

[0125] Here, as described above, under the premise that the steering drive unit 200 is relatively fixed to the upper vertical shaft mounting portion 81A, the tilt drive unit 100 may be relatively rotatable at the lower portion of the steering drive unit 200 .

[0126] When the upper end of the tilting connection parts 300A and 300B tilts forward, the tilting drive unit 100 can rotate backward by a predetermined angle based on the T3 rotation point by the load of the antenna device A as a weight connected to the upper end of the tilting connection parts 300A and 300B. That is, if the upper end of the antenna device A is tilted and rotated forward by the tilting connection parts 300A and 300B, the center of gravity of the antenna device A moves backward, and in order to compensate for the movement of the center of gravity, the tilting drive unit 100 rotates relative to the steering drive unit 200 based on the T3 rotation point.

[0127] Here, the tilting drive unit 100 and the steering drive unit 200 are not necessarily connected via only one rotation point, ie, the T3 rotation point.

[0128] If, although not shown, a connecting member of the same shape as the tilt connecting members 300A, 300B can be added for hinge connection to increase the tilt rotation point at each end. However, when the tilt drive unit 100 and the steering drive unit 200 are connected in the form of a connecting member, all the members such as hinges need to be configured as a pair, so there is a disadvantage of increasing the number of parts.

[0129] In the case of the antenna clamping device 1 of one embodiment of the present invention, no connecting component type components are added, but only a pair of unit connecting hinges 117 are used to hinge the tilting drive unit 100 and the steering drive unit 200 to each other, thereby having the advantages of realizing the miniaturized design of the entire product and saving the number of components.

[0130] On the other hand, Figure 4a and Figure 4b As shown, for the T3 rotation point, as a condition in which the tilting connecting parts 300A and 300B are not tilted and driven, when the T1 rotation point and the T2 rotation point are located on a vertical straight line, the T3 rotation point is preferably located at least further back than the T1 rotation point and the T2 rotation point. More preferably, the T3 rotation point can be set to be at least further forward than the two steering rotation points S1 and S2 located on a vertical straight line. Hereinafter, among the steering rotation points, the rotation point indicated by S1 is referred to as "S1 rotation point" and the rotation point indicated by S2 is referred to as "S2 rotation point" for recording.

[0131] Therefore, the T3 rotation point is located further back than the virtual connecting straight line between the T1 rotation point and the T2 rotation point, and can be located further forward than the two steering rotation points S1 and S2, under the premise of stopping at a position before the tilt driving tilt connection parts 300A and 300B.

[0132] Here, since the antenna device A is a predetermined weight part, when the direction of the antenna device A is adjusted by tilting and rotating, mechanical tooth gap noise is generated from the mechanical connection structure of the connection point (T1 rotation point) of the tilting connecting parts 300A and 300B; when the T3 rotation point is close to the virtual connecting straight line of the T1 rotation point and the T2 rotation point, the mechanical tooth gap noise phenomenon is further aggravated; on the other hand, when the T3 rotation point is consistent with the virtual connecting straight line of the two steering rotation points S1 and S2 or is located further behind, on the premise that the protruding lengths of the upper vertical axis mounting part 81A and the lower vertical axis mounting part 81B are the same, the steering rotation angle can be limited to a predetermined range by the surrounding components.

[0133] Therefore, it is more preferred that the T3 rotation point is located further back than the virtual connecting straight line between the T1 rotation point and the T2 rotation point, and is set at a position with the maximum distance from the virtual connecting straight line between the two steering rotation points S1 and S2, under the premise of stopping at a position before the tilt driving tilt connecting parts 300A and 300B. In this case, it can be set to a position where mechanical backlash noise is not generated. The causes of the above-mentioned mechanical backlash noise and its prevention principle will be described in more detail later.

[0134] On the other hand, Figures 1a to 4b As shown, the antenna device A can be combined as follows: the tilting rotation and / or steering rotation driving force of the tilting drive unit 100 and the steering drive unit 200 is received through the antenna mounting bracket 90, and the antenna tilting rotation point T4 (hereinafter referred to as "T4 rotation point") at the upper end and the lower end is tilted and rotated in the front-to-back direction as the center, or the left and right ends are steered and rotated in the front-to-back direction with the two steering rotation points S1 and S2 as the center.

[0135] In more detail, the antenna mounting bracket 90 has a pair of tilting connecting parts 300A, 300B and a tilting drive unit 100 and a steering drive unit 200 inserted in the upper end, is rotatably connected to the upper supporting bracket part 80A at least at one point, and is rotatably connected to the lower supporting bracket part 80B at least at one point in the lower end.

[0136] like Figure 3a and Figure 3bAs shown, the antenna mounting bracket 90 may include two mounting expansion portions 94 , and the mounting expansion portions 94 are formed to extend outward from the base plate 91 formed in a rectangular panel shape.

[0137] A plurality of bolt through holes 95 are formed in the base plate 91 and the mounting expansion portion 94. This is to diversify the positions of the plurality of bolt through holes 95 so that the antenna device A can be fastened to an appropriate position of the base plate 91 according to the size and shape of the antenna device A to be coupled. Figure 4a ) The antenna device A can be firmly mounted on the antenna mounting bracket 90 by passing through a plurality of bolt through holes 95 and then fastening to bolt fastening holes (not shown) formed on the back side of the antenna device A.

[0138] At the same time, the antenna mounting bracket 90 may also include four diagonal mounting parts 92, which extend from each corner portion of the base plate 91 of the antenna mounting bracket 90 to the outer diagonal direction as a whole, and additional bolt fastening holes 93 may be formed in the diagonal mounting parts 92 respectively.

[0139] On the other hand, antenna mounting bracket 90 has antenna mounting fastening holes 96 extending in the front-rear direction at multiple locations, and antenna device A can be firmly coupled to the back side thereof by multiple antenna fastening bolts 97 fastened through the antenna mounting fastening holes 96 .

[0140] An upper horizontal bracket 98U is fixed to the back of the upper two diagonal mounting parts 92 among the four diagonal mounting parts 92, and a lower horizontal bracket 98D can be fixed to the back of the lower two diagonal mounting parts 92 among the four diagonal mounting parts 92. In particular, the lower horizontal bracket 98D can be bolted to the additional bolt fastening hole 93 formed in the antenna mounting bracket 90 by means of an additional mounting bolt 98S that penetrates the lower horizontal bracket 98D from front to back.

[0141] The upper horizontal bracket 98U performs the function of hinge-connecting the pair of inclined connection parts 300A and 300B with respect to the T2 rotation point formed at the upper end of the pair of inclined connection parts 300A and 300B connected to the base plate 91. In particular, hinge insertion holes 301 and 302 for hinge connection can be respectively arranged at the ends of the pair of inclined connection parts 300A and 300B corresponding to the T1 rotation point and the T2 rotation point.

[0142] In addition, the lower horizontal bracket 98D performs a hinge connection for the base plate 91 to be connected to the T4 rotation point formed by installing the rotation block 400.

[0143] The upper horizontal support 98U and the lower horizontal support 98D are formed to extend in the left-right horizontal direction.

[0144] In the upper horizontal bracket 98U, a pair of upper hinge connection ends 99U extend rearward and intervene in the connection hinges 311, 312. The upper horizontal bracket 98U can be hingedly connected to the inclined connection parts 300A, 300B through the hinge intervention hole 302 corresponding to the T2 rotation point of the inclined connection parts 300A, 300B.

[0145] In the lower horizontal bracket 98D, a pair of lower hinge connection ends 98D-1 extend rearward and intervene in a pair of module tilt hinges 440L and 440R described later, so that the lower horizontal bracket 98D can be hingedly connected to the front end of the mounting rotating block 400 through the T4 rotation point.

[0146] The structure of the hinged joint 99D of the lower horizontal bracket 98D and the rotating block 400 will be described in more detail in the later part of the description of the principle of blocking mechanical tooth gap noise.

[0147] The following is a brief description of the mounting form and advantages of the pole P using the antenna clamp device 1 according to one embodiment of the present invention having the above-described structure.

[0148] That is, Figure 5a to Figure 5c As shown, the antenna clamping device 1 of the present invention selectively installs the connecting rod assembly 60 according to the surrounding conditions of the pole P to change the installation position of the antenna device A, and tightly combines the antenna device A with the pole P or separates it from the pole P by a predetermined distance.

[0149] If, such as Figure 5a and Figure 5b As shown, when the connecting rod assembly 60 is not provided (refer to (a) of each figure), the antenna device A is relatively tightly coupled to the pole P, and in the absence of surrounding interfering structures (other antenna devices, etc.), the antenna device A can be densely installed to minimize interference in adjusting the direction; when the connecting rod assembly 60 is provided (refer to (b) of each figure), in order to prevent the antenna device A from interfering with the surrounding interfering structures (other antenna devices, etc.), the antenna device A can be dispersedly installed at a predetermined distance (refer to the figure mark "D") from the pole P.

[0150] like Figure 5c As shown, the connecting rod assembly 60 can be combined with the holding pole P in the following manner: a pair of front and rear horizontal rods 61A, 61B pass through the left and right horizontal rods 63 and extend a predetermined length toward the upper fixed bracket portion 50A and the lower fixed bracket portion 50B, and the holding pole fixing bolts 52 inserted through the upper fixed bracket portion 50A and the lower fixed bracket portion 50B are respectively fastened to the bolt fastening holes 65 at the front ends of the pair of front and rear horizontal rods 61A, 61B.

[0151] Figure 7 is Figure 4a and Figure 4b An exploded perspective view of a structure in which the lower end of the antenna mounting bracket part is decomposed from the pole-side mounting bracket part and the mounting rotating block involved in the connection; Figure 8a and Figure 8b is Figure 7 The front and rear parts of the structure are exploded in a three-dimensional diagram of the installation rotating block; Fig. 9 It is used to illustrate Figure 8a and Figure 8b A vertical cross-sectional view of a portion of a connection portion of a structure in which the anti-backlash bushing functions.

[0152] The antenna clamping device 1 of one embodiment of the present invention may also include a tooth gap reduction design shape to block the mechanical tooth gap noise phenomenon that may occur due to the eccentric load in the gravity direction of the antenna device A when adjusting the direction of the relatively heavy antenna device A through a tilting rotation action and / or a turning rotation action.

[0153] In particular, the antenna clamp device 1 according to one embodiment of the present invention has backlash reduction design shapes dispersedly applied to multiple connection locations related to the tilting or turning motions. This section will describe the backlash reduction design shapes in more detail.

[0154] like Figures 7 to 9 As shown, an antenna clamping device 1 according to an embodiment of the present invention is a device that, in order to enable the antenna device A to smoothly perform steering and rotation movements, the antenna device A is hingedly connected to two steering and rotation points S1 and S2 arranged in the same vertical line direction up and down. At the same time, in order to enable the antenna device A to smoothly perform tilting and rotation movements, the antenna device A is hingedly connected to four steering and rotation points T1, T2, T3, and T4 arranged in different horizontal line directions on the left and right.

[0155] Here, among the two steering rotation points S1 and S2, the upper rotation point S1 is the hinge point of the steering drive unit 200 itself, which is described later, for steering and rotating in the left and right directions; among the two steering rotation points S1 and S2, the lower rotation point S2 is actually the hinge point of the lower end of the antenna mounting bracket 90 combined with the antenna device A for steering and rotating in the left and right directions, thereby enabling a more stable steering and rotating action of the antenna device A to be achieved.

[0156] More specifically, in order to hinge the steering drive unit 200 through the upper rotation point S1, the pair of upper vertical shaft mounting portions 81A are respectively inserted from the upper and lower sides to fasten the steering hinge connection bolts 82 in the vertical direction, and then fastened to the steering shaft 240 (refer to Fig.10a ) at both ends. The specific description of the steering shaft 240 combined with the steering hinge connecting bolt 82 will be described in more detail later.

[0157] On the other hand, as described above, among the four tilting rotation points T1, T2, T3, and T4, the T1 rotation point and the T2 rotation point are hinge points (fixed points and rotation points) of the upper end of the antenna mounting bracket 90 that is rotated to engage the antenna device A through the rotation action of the tilting connecting parts 300A and 300B.

[0158] Then, as described above, the T3 rotation point is a hinge point of relative rotation between the tilt drive unit 100 and the steering drive unit 200 .

[0159] Finally, as described above, the T4 rotation point is a hinge point for the lower end portion of the mounting rotation block 400 to rotationally support the antenna mounting bracket 90 so that the antenna mounting bracket 90 combined with the intervention antenna device A can perform a tilting rotation action.

[0160] In more detail, refer to Figure 8a and Figure 8b The installation of the rotating block 400 may include: a rotating block body 410, a rear end hingedly connected to the lower supporting bracket portion 80B, and a front end hingedly connected to the rear lower end of the antenna mounting bracket 90 (i.e., the lower horizontal bracket 98D); a steering hinge cover 420, coupled to the side surface of the rear end of the rotating block body 410; and a tilting hinge cover 430, coupled to the bottom of the front end of the rotating block body 410.

[0161] At the same time, the installation of the rotating block 400 may also include: steering hinge mounting grooves 425A, 425B, which are processed into groove shapes that are open toward the upper side and the lower side of the rotating block 410 and the steering hinge cover 420 respectively; an upper steering hinge 450U-1 and a lower steering hinge 450D-1, which support steering rotation by forming an upper hinge mounting groove 82h-U and a lower hinge mounting groove 82h-D formed on the lower vertical axis mounting part 81B and respectively interposing the upper and lower steering hinge mounting grooves 425A, 425B.

[0162] Here, the upper and lower steering hinge mounting grooves 425A and 425B can be respectively recessed and processed into a shape that has a substantially circular cross section on the inner side and gradually increases in diameter toward the upper and lower sides when the steering hinge cover 420 is combined with the rotating block 410. Therefore, the upper and lower steering hinge mounting grooves 425A and 425B can have a trapezoidal vertical cross section in which the side length of the portion corresponding to the inner side is relatively smaller than the side length of the portion corresponding to the outer end.

[0163] At the same time, the upper steering hinge 450U-1 and the lower steering hinge 450D-1 are preferably formed so that, except for the parts fastened to the upper hinge mounting groove 82h-U and the lower hinge mounting groove 82h-D, the insertion parts inserted into the above-mentioned upper and lower steering hinge mounting grooves 425A, 425B correspond to the groove processing shapes of the upper and lower steering hinge mounting grooves 425A, 425B to form a matching shape.

[0164] Here, an upper steering hinge bushing 450U-2 and a lower steering hinge bushing 450D-2 may be respectively inserted between the upper steering hinge 450U-1 and the lower steering hinge 450D-1 and the upper and lower steering hinge mounting grooves 425A and 425B.

[0165] On the other hand, the installation of the rotating block 410 may also include: tilt hinge mounting grooves 435A and 435B on one side and the other side, which are processed into groove shapes that are open toward one side and the other side of the rotating block 410 and the tilt hinge cover 430 respectively; a tilt hinge 440L-1 on one side and a tilt hinge 440R-1 on the other side, which support the tilt rotation by inserting the lower hinge holes 98D-1h formed at a pair of lower hinge connecting ends 98D-1 of the lower horizontal bracket 98 into the tilt hinge mounting grooves 435A and 435B on one side and the other side respectively.

[0166] Here, the inclined hinge installation grooves 435A and 435B on one side and the other side can be recessed and processed into a shape that is roughly formed into a circular cross-section on the inner side and gradually increases in diameter toward the one side and the other side when the rotating block 410 is combined with the inclined hinge cover 430. Therefore, the inclined hinge installation grooves 435A and 435B on one side and the other side can have a trapezoidal vertical cross-section in which the side length of the portion corresponding to the inner side is relatively smaller than the side length of the portion corresponding to the outer end.

[0167] The tilt hinge 440L-1 on one side and the tilt hinge 440R-1 on the other side are preferably formed so that, except for the parts fastened to the lower hinge holes 98D-1h on one side and the other side, the insertion parts inserted into the tilt hinge mounting grooves 435A and 435B on the above-mentioned one side and the other side correspond to the groove processing shapes of the tilt hinge mounting grooves 435A and 435B on one side and the other side to form matching shapes.

[0168] Here, a one-side tilt hinge bushing 440L-2 and a another-side tilt hinge bushing 440R-2 may be interposed between the one-side tilt hinge 440L-1 and the other-side tilt hinge 440R-1 and the hinge mounting grooves 435A and 435B on one side and the other side.

[0169] Generally, a bushing is a friction consumption component that is inserted between two relatively moving objects to guide the combination of the two objects or to support the motion characteristics between the two objects. In particular, when the bushing performs the function of supporting a rotating object for a fixed object, a rectangular (rectangular quadrilateral) groove with an opening on one side is usually processed on the fixed object, and then a part of the rotating object is inserted into the groove, and a bushing with a shape corresponding to the groove is made to intervene in the insertion part of the rotating object, thereby preventing the rotating object from directly contacting the inner side of the groove of the fixed object when the rotating object moves. Therefore, the bushing is usually formed into a hollow cylindrical shape with one end closed.

[0170] However, the bushing having the shape described above (i.e., a groove having a rectangular vertical cross-section) has one end that is closed, so when there is an assembly tolerance between the groove of the fixed object and the insertion portion of the rotating object, there is a problem of difficulty in coping with the tolerance in the direction of the rotating axis.

[0171] At the same time, in order to ensure smooth assembly between parts, assembly tolerances must usually be set when manufacturing parts. However, in a case such as the present invention, the bushing is configured to support the tilting rotation and turning rotation movements in order to adjust the direction of the antenna device A as a predetermined weight piece, and the bushing is manufactured into a rectangular (right-angled quadrilateral) groove shape as the ordinary type described above and a predetermined assembly tolerance is set. There is a concern that the bushing itself may be twisted and damaged or mechanical tooth clearance noise may be caused due to the unique eccentric load imparted by the tilting rotation and turning rotation.

[0172] In one embodiment of the present invention, in order to prevent the above-mentioned mechanical backlash noise from being generated, the mounting rotating block 400 may further include a backlash reducing design shape.

[0173] In more detail, the backlash reduction design shape is that the upper steering hinge bushing 450U-2 and the lower steering hinge bushing 450D-2 respectively interposed between the upper and lower steering hinge mounting grooves 425A, 425B related to the steering rotation action of the antenna device A are designed to have a trapezoidal vertical cross-section shape, and at the same time, the one side tilt hinge bushing 440L-2 and the other side tilt hinge bushing 440R-2 respectively interposed between the tilt hinge mounting grooves 435A, 435B on one side and the other side related to the tilt rotation action of the antenna device A are designed to have a trapezoidal horizontal cross-section shape.

[0174] As described above, since the antenna device A is a predetermined weight, due to the unique turning and tilting action achieved by adjusting the direction of the antenna device A, an eccentric load is inevitably generated, thereby causing a mechanical backlash noise phenomenon. The principle of minimizing this mechanical backlash noise phenomenon will be referred to. Fig. 9 A brief explanation is given below.

[0175] For reference, the above-mentioned mechanical tooth gap noise phenomenon is understood to be generated by the steering rotation points S1 and S2 configured to support the tilting direction of the antenna device A as a predetermined weight part, that is, the load in the front-to-back direction when the antenna device A is tilted and rotated, and is understood to be generated by the tilt rotation points T1, T2, T3, and T4 configured to support the steering direction of the antenna device A as a predetermined weight part, that is, the centrifugal force load in the left-to-right direction when the antenna device A is turned and rotated in the opposite direction.

[0176] Reference Fig. 9 When the antenna device A installed with the rotating block 400 is tilted and rotated in the forward and backward direction, the load of the antenna device A as a weight piece produces an eccentric effect, so that it tends to be forward on the virtual up and down straight line formed by the turning points S1 and S2 of the lower vertical axis mounting part 81B.

[0177] An antenna clamping device 1 according to an embodiment of the present invention is a device that, in order to cope with the above-mentioned eccentric load that acts when adjusting the direction of the antenna device A, the upper and lower steering hinge mounting grooves 425A, 425B, the insertion parts of the upper steering hinge 450U-1 and the lower steering hinge 450D-1 inserted into the upper and lower steering hinge mounting grooves 425A, 425B, and the upper steering hinge bushing 450U-2 and the lower steering hinge bushing 450D-2 interposed between the two components are formed to have the above-mentioned trapezoidal cross-section.

[0178] Therefore, it has the following advantages: when there is an assembly tolerance between the upper steering hinge 450U-1 and the lower steering hinge 450D-1 inserted into the upper and lower steering hinge mounting grooves 425A and 425B and the upper steering hinge bushing 450U-2 and the lower steering hinge bushing 450D-2 respectively interposed between the two components, it is also possible to prevent the problem of the disappearance of the rotational support function while the bushings 450U-2 and 450D-2 are twisted into an elliptical shape, and at the same time, when supporting an eccentric load, the rotational support function can be maintained while the surface in the trapezoidal cross-section that is inclined to the steering rotation points S1 and S2 is deformed.

[0179] In addition, when the antenna device A is tilted, the eccentric load is also consistent with the upper and lower steering hinge mounting grooves 425A, 425B, the upper steering hinge 450U-1 and the lower steering hinge 450D-1 and the inclined surfaces of the upper steering hinge bushing 450U-2 and the lower steering hinge bushing 450D-2 interposed between these two components, thereby having the advantage of preventing the generation of mechanical tooth gap noise during tilting.

[0180] Fig.10a and Fig.10b An exploded perspective view showing the left and right sides of a tilt drive unit and a turn drive unit in the structure of the antenna clamp device according to one embodiment of the present invention.

[0181] like Fig.10a and Fig.10b As shown, a clamping device 1 for an antenna according to an embodiment of the present invention may include a tilting drive unit 100 and a steering drive unit 200, wherein the tilting drive unit 100 and the steering drive unit 200 are combined in front of a connecting rod assembly 60 or an upper supporting bracket portion 80A or a lower supporting bracket portion 80B. The connecting rod assembly 60, the upper supporting bracket portion 80A or the lower supporting bracket portion 80B are involved in installing the antenna device A on the pole P in order to adjust the direction of the antenna device A.

[0182] The tilt driving unit 100 may include a tilt driving unit housing 110 having an inner space 110S for housing a tilt driving unit 130 described later, and a tilt driving unit housing cover 120 for closing one side of an opening of the tilt driving unit housing 110 .

[0183] The tilt driving unit housing cover 120 may be coupled to one end portion of the opening of the tilt driving unit housing 110 by a plurality of cover assembly screws 125 .

[0184] The tilting drive unit housing 110 and the tilting drive unit housing cover 120 may form tilting axis connecting holes 111h and 121h, which are respectively connected to the internal space 110S and expose the left and right ends of a tilting axis 140, which is one of the structures of the tilting drive unit 130 described later, to the outside.

[0185] Both ends of the tilt shaft 140 exposed to the outside through the tilt shaft connection holes 111h and 121h are connected to the tilt connection members 300A and 300B, so that the tilt driving force transmitted from the tilt driving motor 150 described later can be transmitted to the tilt connection members 300A and 300B.

[0186] On the other hand, the steering drive unit 200 may include a steering lower housing 210 on which a steering drive unit 230 described below is mounted and coupled, and a steering upper housing 220 covering and shielding the steering drive unit 230 mounted and coupled to the steering lower housing 210 .

[0187] The turning upper housing 220 may be coupled to an upper end portion of a frame of the turning lower housing 110 by a plurality of housing assembly screws 225 , and the turning lower housing 210 is configured to cover an upper side of the inclined lower housing 210 .

[0188] A steering shaft connecting hole 221h (not shown on the lower side) can be formed in the steering upper shell 210 and the steering lower shell 220, respectively. The steering shaft connecting hole 221h is connected to the steering upper shell 220 and the steering lower shell 210 and the installation space of the steering drive unit 230 installed inside (not marked with a figure mark), and the upper end and lower end of the steering shaft 240, which is one of the structures of the steering drive unit 230 described later, are exposed to the outside.

[0189] The two ends of the steering shaft 240 exposed to the outside through the steering shaft connecting hole 221h (not shown) are connected to the steering hinge connecting bolts 82 arranged on the upper vertical shaft mounting portion 81A. The steering drive force transmitted from the steering drive motor 250 described later can enable the steering drive unit 200 itself to perform steering rotation.

[0190] Fig.11a and Fig.11b 1. It is an exploded perspective view of one side and the other side showing the connection relationship between the tilting drive unit, the steering drive unit and the tilting connection member in the structure of the antenna clamping device according to one embodiment of the present invention; Fig.12 yes Fig.11a Detailed exploded perspective view.

[0191] On the other hand, Fig.10a and Fig.10b As shown, the tilting drive unit 100 and the steering drive unit 200 can be hinge-connected via the unit connection hinge 117 at the hinge center point corresponding to the T3 rotation point.

[0192] To this end, hinge through ends 113, 213 are formed at the left and right sides of the upper end of the tilting drive unit housing 110 and the upper end of the tilting drive unit housing cover 120, respectively, and hinge through holes 114, 124 are formed at each hinge through end 113, 213 to fasten a pair of unit connecting hinges 117; hinge fastening ends 213 are formed at the left and right sides of the lower end of the turning lower housing 210, respectively, and hinge fastening holes 214 can be formed at the hinge fastening ends 213 to fasten the unit connecting hinges 117 passing through the hinge through holes 114, 124 of the hinge through ends 113, 213.

[0193] On the other hand, the tilting shaft 140 and the steering shaft 240 respectively function as driving force transmission parts that receive driving force from the tilting drive motor 150 and the steering drive motor 250 to realize the tilting rotation drive and steering rotation drive of the tilting drive unit 100 and the steering drive unit 200, and also simultaneously perform the role of supporting the load of the antenna device A as a weight in the tilting direction and the steering direction respectively when the antenna device A performs the tilting rotation and the steering rotation actions.

[0194] Therefore, the antenna clamping device 1 according to an embodiment of the present invention may further include a design shape for reducing backlash at the power connection point between the tilt shaft 140 and the steering shaft 240 .

[0195] In more detail, the design shape for reducing the backlash may be implemented as follows.

[0196] That is, there is a concern that mechanical backlash noise may occur between the tilt axis 140 and the steering axis 240 even when the direction of the antenna device A is adjusted. In order to minimize the mechanical backlash noise, the antenna clamping device 1 according to one embodiment of the present invention may further include one side matching section 143, 243 and another side matching section 303, 83 (reference numeral "83" refers to the reference numeral "83" in the figure). Figure 4a ), the one side matching parts 143, 243 and the other side matching parts 303, 83 have a trapezoidal cross-section, that is, at least a part of the ends of the tilting shaft 140 and the steering shaft 240 and the tilting connecting parts 300A, 300B connected to the ends of the tilting shaft 140 and the steering shaft 240 and the upper vertical shaft mounting parts 81A, 81B form an inclined surface with respect to each rotation axis direction.

[0197] In more detail, one side matching portion 143 may be formed on the left and right end surfaces corresponding to the T1 rotation point of the tilting shaft 140, and the one side matching portion 143 is a tooth surface and a tooth valley that are repeatedly stuck in the circumferential direction except for the central portion. A bolt fastening hole 145 may be formed in the central portion of the one side matching portion 143, and the bolt fastening hole 145 is inserted and fastened with a connection assembly bolt 305 for bolt-fastening the tilting connection components 300A and 300B.

[0198] At the same time, the inner side surfaces of the inclined connection parts 300A and 300B corresponding to the T1 rotation point can be respectively formed with the other side matching parts 303, which are tooth surfaces and tooth valleys that are repeatedly stuck in the circumferential direction except for the central part. A bolt through hole 301 for the connection assembly bolt 305 to pass through can be formed in the central part of the other side matching part 303.

[0199] On the other hand, a side matching portion 243 may be formed on the upper end surface and the lower end surface of the steering shaft 240, which are the tooth surfaces and tooth valleys that are repeatedly stuck in the circumferential direction except for the central portion. A bolt fastening hole 245 may be formed in the central portion of the side matching portion 243, and a fastening hinge connection bolt 82 may be inserted into the bolt fastening hole 245 for bolt assembly of a pair of upper vertical shaft mounting portions 81A.

[0200] At the same time, the lower part and the upper part of the pair of upper vertical shaft mounting parts 81A corresponding to the rotation points of S1 and S2 can respectively form the other side matching part 83, and the other side matching part 83 is a tooth surface and a tooth valley that are repeatedly stuck in the circumferential direction except for the central part. A bolt through hole (not marked with a reference numeral) for the above-mentioned hinge connection bolt 82 to pass through can be formed in the central part of the other side matching part 83.

[0201] Here, the tooth surfaces and tooth valleys respectively formed at the matching parts 143, 243 on one side and the matching parts 303, 83 on the other side are firmly matched and combined (meshed) with each other through the connecting assembly bolts 305 and the hinge connecting bolts 82, thereby being able to transmit the driving force in the tilting rotation direction and the steering rotation direction. At the same time, the tooth surfaces and tooth surfaces at the matching parts have an inclined surface, i.e., a trapezoidal cross-section, thereby preventing the generation of mechanical tooth gap noise.

[0202] The feature of blocking the mechanical backlash noise by the shape structure of the one side matching part 143, 243 and the other side matching part 303, 83 as described above is not only applicable to the connection structure between the tilt connection parts 300A, 300B and the tilt shaft 140 and the connection structure between the upper and lower vertical shaft mounting parts 81A and the steering shaft 240. That is, although it will be described in more detail later, in order to block the mechanical backlash noise as described above, it can also be directly applied to the mounting structure of the tilt drive motor 150 of the tilt drive unit 100 and the steering drive motor 25 of the steering drive unit 200.

[0203] Fig.13a and Fig.13b It is an exploded perspective view of one side and the other side of a tilt driving unit in the structure of the antenna clamp device according to one embodiment of the present invention.

[0204] like Fig.13a and Fig.13b As shown, the tilt driving unit 200 may further include: an electrically driven tilt driving motor 150 ; and a transmission gear assembly 160 that receives driving force from the tilt driving motor 150 and transmits the driving force to the tilt shaft 140 .

[0205] The tilt driving motor 150 and the transmission gear assembly 160 may be stably installed in the inner space 110S of the tilt driving unit housing 110 through the unit installation frame 180 .

[0206] In particular, the transmission gear assembly 160 is physically divided from other components arranged in the internal space 110S by a gear box housing 192, and the gear box housing 192 is connected by a plurality of box fixing bolts 195 to cover the upper portion of the gear box base 191 after a plurality of gears are stably axially mounted on the upper surface provided by the gear box base 191.

[0207] Here, the transmission gear assembly 160 may include: a first transmission gear 161, which is an input gear meshing with the motor worm gear 151 connected to the rotating shaft of the tilt drive motor 150; a second transmission gear 162, which is meshing with the first transmission gear 161; a third transmission gear 163, which is meshing with the second transmission gear 162; a fourth transmission gear 164, which is meshing with the third transmission gear 163; and a fifth transmission gear 170, which is meshing with the fourth transmission gear 164.

[0208] The first to fifth transmission gears 161-164, 170 are configured to be respectively formed by second-speed gears with different diameters, so that the meshing parts of the input part and the output part are different from each other in terms of transmission sequence, and all of the five transmission gears 161-164, 170 have different gear meshing ratios, thereby converting the usage capacity of the tilt drive motor 150 into an appropriate deceleration force and deceleration ratio that can be transmitted to the tilt shaft 140.

[0209] In particular, the first transmission gear 161 performs the function of serving as an input gear, and the motor worm gear 151 is configured as a worm gear type in the gear form connected to the rotating shaft of the tilting drive motor 150, so at least one of the second gears of the first transmission gear 161 preferably adopts a worm gear type gear that is easily engaged with the worm gear; the fifth transmission gear 170 performs the function of serving as an output gear, and the tilting shaft worm gear 141 is configured as a worm gear type in the gear form connected to the outer peripheral surface of the tilting shaft 140 as described below, so at least one of the second gears of the fifth transmission gear 170 preferably adopts a worm gear type gear that is easily engaged with the worm gear.

[0210] The inclined-axis worm gear 141 can mesh with the rack teeth 171 formed on the outer peripheral surface of the fifth transmission gear 170 among the five transmission gears to transmit power.

[0211] Here, in order to smoothly transmit the driving force to a pair of tilting connecting parts 300A and 300B through the mutual matching combination of the one side matching part 143 and the other side matching part 303, the tilting shaft 140 is horizontally arranged in the internal space 110S within the tilting drive part housing 110; the transmission gear assembly 160 is roughly configured to have a rotating axis in the up and down direction; the tilting drive motor 150 can be horizontally arranged left and right to have a rotating axis parallel to the tilting shaft 140.

[0212] Meanwhile, a motor control board 185 may be installed at a rear portion in the inner space 110S of the tilt driving part housing 110 through a substrate fixing bracket 186 .

[0213] On the other hand, a tilt damper (not shown) may be further disposed between the tilt drive motor 150 and the inner side surface of the tilt drive housing 110. The tilt damper attenuates the operating reaction force transmitted in the reverse direction from the antenna device A as a weight by the tilt drive of the tilt drive motor 150, and performs the function of preventing the generation of mechanical backlash noise. Hereinafter, since the structure and function of the tilt damper are the same as those of the steering damper 500 described later, the tilt damper will be described in more detail in the description of the steering damper 500.

[0214] Fig.14 is an exploded perspective view of a steering drive unit in the structure of an antenna clamping device according to an embodiment of the present invention; Fig.15 It is shown Fig.14 A three-dimensional view of the transmission gear assembly in a state where the gear housing is removed in the structure; Fig.16 is Fig.14 A plan view of the structure in which the upper outer shell of the steering unit is removed.

[0215] like Figures 14 to 16 As shown, the steering drive unit 200 may further include: an electrically driven steering drive motor 250 ; and a transmission gear assembly 260 that receives driving force from the steering drive motor 250 and transmits the driving force to the steering shaft 240 .

[0216] The steering drive motor 250 and the transfer gear assembly 260 may be stably installed in the inner space between the steering lower housing 210 and the steering upper housing 220 through a unit installation frame (not shown).

[0217] In particular, the transmission gear assembly 260 can be physically separated from other components arranged in the internal space by the gear box housing 292, and the gear box housing 292 is connected by a plurality of gear box fixing bolts 295 to cover the side of the gear box base 291 after stably setting a plurality of gears with an axis on the side provided by the gear box base 291 configured in the up and down direction.

[0218] Here, the various structures of the transmission gear assembly 260 (i.e., the first to fifth transmission gears 261-264, 270 and the motor gear 251) and the mechanism for transmitting the driving force of the steering shaft 240 are similar to the mechanism for transmitting the driving force of the transmission gear assembly 160 and the tilting shaft 140 described in the tilting drive unit 100, except that the direction is different, so detailed description is omitted.

[0219] On the other hand, a steering damper 500 may be disposed as a backlash reduction design shape between the steering drive motor 250 and the inner side surface of the steering upper housing 220. The steering damper 500 attenuates the operating reaction force transmitted in the reverse direction from the antenna device A as a weight due to the steering drive of the steering drive motor 250, and performs the function of preventing the generation of mechanical backlash noise.

[0220] In more detail, Fig.14 and Fig.15 As shown, the steering damper 500 may be disposed between an upper end portion of the steering drive motor 250 in an opposite direction to a lower end portion connected to the rotating shaft and an inner side surface of the steering upper housing 220 .

[0221] The steering damper 500 may include: a mounting washer 510, which is inserted into the lower end of the steering drive motor 250; a lower damper 520, which is fixed to the mounting protrusion 252 of the steering drive motor 250, and the mounting protrusion 252 passes through the through hole 510h of the mounting washer 510; and an upper damper 530, which has a lower end that overlaps and matches with a part of the upper end of the lower damper 520.

[0222] The lower damper 520 is formed by repeatedly forming tooth surfaces (reference numeral “ 521 ”) and tooth valleys (reference numeral “ 522 ”) in the circumferential direction, and the portion forming the tooth surface 521 overlaps and matches with a portion of the upper damper 530 .

[0223] The upper damper 530 is formed with a through hole 530h on the upper portion for a fixing protrusion (not shown) formed on the inner side of the steering upper housing 220 to pass through for fastening, and a tooth surface (reference numeral "531") and a tooth valley (reference numeral "532") are repeatedly formed in a circumferential direction on the lower portion, so that the portion of the tooth surface 531 can be inserted into and matched with the tooth valley 522 portion of the lower damper 520.

[0224] The steering damper 500 having the above-described structure has the function of attenuating the eccentric load of the antenna device A as a weight when the antenna device A is tilted and rotated in the front-rear direction and when the antenna device A is adjusted in the left-right direction by steering rotation, thereby preventing the mechanical backlash noise of the steering drive motor 250 from being generated. It is preferable to understand that this function is directly applicable even when the tilt damper (not shown) whose specific description is omitted is omitted.

[0225] The antenna clamping device 1 of one embodiment of the present invention is, as described above, a technical feature for minimizing or preventing the generation of mechanical tooth gap noise that may be generated when adjusting the direction of the antenna device A. 1) The position of the T3 tilt rotation point directly related to the tilt rotation action is effectively designed and applied; 2) The shape design of each hinge-related structure of the mounting rotation block 400 involved in mounting the antenna mounting bracket 90 on the lower vertical axis mounting part 81B is changed and applied; 3) The peripheral structure connected to the tilt axis 140 and the steering axis 240 is changed and applied; 4) The connection part of the tilt drive motor 150 and the steering drive motor 250 is changed and designed.

[0226] At the same time, if Fig.16 As shown, the antenna clamping device 1 of one embodiment of the present invention is that, assuming that the tilting force acts in the forward and backward direction (FR) when the antenna device A performs a tilting and rotating action, the axial direction E of the worm gear 271 of the fifth transmission gear 270 meshing with the worm gear 241 of the steering shaft 240 is preferably configured to be slightly tilted to one side rearward or the other side rearward compared to the left and right horizontal direction.

[0227] This is because when the worm gear 241 of the steering shaft 240 is meshed with the worm gear 271 of the fifth transmission gear 270 in an inclined direction orthogonal to the front-to-back direction (FR), it has the advantage of attenuating the mechanical tooth gap noise during the steering rotation action of the antenna device A, but this can reduce the mechanical tooth gap noise attenuation effect during the tilt rotation action of the antenna device A.

[0228] Fig.17 This is a perspective view showing a state in which the direction of an antenna device is set by tilting and / or turning the antenna device using the antenna clamping device according to one embodiment of the present invention.

[0229] exist Fig.17 (a) shows the installation state of the antenna device A on the pole P, which is the state before the direction is adjusted by tilting and turning, as an antenna device A installed on the pole P by the antenna clamping device 1 according to one embodiment of the present invention.

[0230] Here, if Fig.17As shown in (b), when the user can complete the direction adjustment only by the tilting and rotating action of the antenna device A, the tilt driving motor 150 of the tilt driving unit 100 can be operated to tilt and rotate.

[0231] Here, if Fig.17 As shown in (c), when the direction adjustment is completed only by the turning and rotating action of the antenna device A, the turning drive motor 250 of the turning drive unit 200 can be turned.

[0232] Then, if Fig.17 As shown in (d), when the user needs to adjust the direction through the tilting rotation and steering rotation of the antenna device A at the same time, the tilting drive motor 150 of the tilting drive unit 100 and the steering drive motor 250 of the steering drive unit 200 are operated for a predetermined time, thereby adjusting the direction of the antenna device A in the desired direction.

[0233] The above is a detailed description of the antenna clamping device 1 according to one embodiment of the present invention with reference to the accompanying drawings. However, the embodiments of the present invention are not necessarily limited to the above-mentioned one embodiment, but relevant persons with common knowledge in the technical field to which the present invention belongs can certainly make various modifications and implement them within the same scope. Therefore, the true protection scope of the present invention should be defined by the claims.

[0234] Industrial Applicability

[0235] The present invention provides a clamping device for an antenna, which can make the antenna device tilt and rotate in the up and down directions and turn and rotate in the left and right directions at the same time, and can ensure the rotation range in each direction to the maximum extent. The user can selectively equip the clamping device with a connecting rod assembly according to the number of antenna devices installed on the holding pole and the installation space. In order to adjust the direction of the antenna, including the tilting and turning rotation of the antenna device of a relatively heavy piece, the tilting and turning rotation can be performed to realize each connection part, and the effect of mechanical gap noise generated from the each connection part can be prevented. The antenna devices can be densely arranged to form two turning points based on the antenna installation bracket, thereby realizing a miniaturized product design.

Claims

1. A clamping device for an antenna, comprising: The fixed bracket part is arranged above and below the pole to intervene in the installation of the antenna device on the pole; Antenna mounting bracket, involved in installing the antenna equipment at the front; A steering drive unit, connected to the fixed support portion, and driven to steer and rotate the antenna device; and A tilt drive unit, the upper end of which is hingedly connected to the steering drive unit, and the lower end of which is hingedly connected to the rear upper end of the antenna mounting bracket through a pair of tilt connection parts, and is driven to tilt and rotate the antenna device; The antenna clamping device also includes a backlash reduction design shape for reducing the generation of mechanical backlash noise caused by an eccentric load of the antenna device.

2. The antenna clamping device according to claim 1, characterized in that: The fixed bracket part includes an upper fixed bracket part and a lower fixed bracket part, the upper fixed bracket part is installed on the holding pole, and the lower fixed bracket part is installed on the holding pole and arranged at the lower part of the upper fixed bracket part.

3. The antenna clamping device according to claim 2, characterized in that: The tooth clearance reduction design shape is that the installation rotating block is configured as an inclined surface, and the installation rotating block is hingedly connected to the lower supporting bracket part corresponding to the lower fixed bracket part and arranged on the holding pole so that it can be tilted and rotated.

4. The antenna clamping device according to claim 3, characterized in that: The backlash reduction design shape has a trapezoidal cross-section including the inclined surface, wherein the inclined surface at least contacts the steering hinge bushing, and the steering hinge bushing is interposed between the steering hinge mounting groove configured at the hinge connection point of the mounting rotating block and the inserted steering hinge.

5. The antenna clamping device according to claim 4, characterized in that: The steering hinge mounting groove is a groove shape with an opening on the upper side and the lower side respectively processed to insert the upper steering hinge and the lower steering hinge through the upper vertical axis mounting part and the lower vertical axis mounting part formed on the lower support bracket part.

6. The antenna clamping device according to claim 4, characterized in that: The mounting rotating block comprises: a rotating block body, the rear end of which is hingedly connected to the lower support bracket part, and the front end of which is hingedly connected to the rear lower end of the antenna mounting bracket; and a steering hinge cover, which is combined with the side surface of the rear end of the rotating block body; The steering hinge installation groove is formed so that the inner side surface has a circular cross section when the rotating block is combined with the steering hinge cover.

7. The antenna clamping device according to claim 3, characterized in that: The backlash reduction design shape has a trapezoidal cross-section including the inclined surface, wherein the inclined surface at least contacts the inclined hinge bushing, and the inclined hinge bushing is interposed between the inclined hinge installation groove configured at the hinge connection point of the rotating block and the inserted inclined hinge.

8. The antenna clamping device according to claim 7, characterized in that: The tilt hinge installation groove is processed into a groove shape that opens toward one side and the other side respectively, so that the tilt hinge on one side and the tilt hinge on the other side are intervened by the lower horizontal bracket arranged at the lower end of the antenna installation bracket.

9. The antenna clamping device according to claim 4, characterized in that: The mounting rotating block comprises: a rotating block body, the rear end of which is hingedly connected to the lower support bracket part, and the front end of which is hingedly connected to the rear lower end of the antenna mounting bracket; an inclined hinge cover, which is combined with the lower front end of the rotating block body; The tilt hinge installation groove is formed such that the inner side surface has a circular cross section when the rotating block is combined with the tilt hinge cover.

10. The antenna clamping device according to claim 1, characterized in that: The tooth clearance reduction design shape is a one-side matching part formed at both ends of the tilting shaft of the tilting drive unit and another-side matching part formed at the end of the tilting connecting component combined with the tilting shaft, having a trapezoidal cross-section with a tooth surface stuck in the rotation direction including an inclined surface.

11. The antenna clamping device according to claim 2, characterized in that: The tooth clearance reduction design shape is a one-side matching part formed at both ends of the steering shaft of the steering drive unit and the other-side matching part formed at the upper supporting bracket part, having a trapezoidal cross-section with a tooth surface stuck in the rotation direction including an inclined surface, wherein the upper supporting bracket part is arranged on the holding rod corresponding to the upper fixed bracket part to combine with the steering shaft.

12. The antenna clamping device according to claim 1, characterized in that: The tooth clearance reduction design shape is that the tilt damper disposed between the inner side surface of the tilt drive part housing of the tilt drive unit and the tilt drive motor and the steering damper disposed between the inner side surface of the steering upper housing of the steering drive unit and the steering drive motor respectively include inclined surfaces interfering with the tilting rotation direction or the steering rotation direction.

13. The antenna clamping device according to claim 1, characterized in that: The steering drive unit comprises: An electrically driven steering drive motor; Steering axle, vertically arranged up and down; and A transmission gear assembly receives a driving force from the steering drive motor and transmits it to the steering shaft; Wherein, in the transmission gear assembly, the transmission gear meshing with the steering shaft is arranged to be tilted forward or backward at a predetermined angle to prevent a tilted rotation direction orthogonal to the front-rear direction of the antenna device.

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