KR20030063282A - Jonit structure for a rotary of a RF active antenna - Google Patents

Abstract

PURPOSE: An apparatus for coupling a revolving body of an RF(Radio Frequency) active antenna is provided to improve the lifetime of products by preventing abrasion due to the contact of metals in rotation. CONSTITUTION: A first hollow revolving body is formed with a first inner diameter unit(111), a second inner diameter unit(112), a third inner diameter unit(113), and a fourth inner diameter unit(114), which are neighbored in turn. A second revolving body(120) is inserted into the first hollow revolving body and includes a hollow rotatory shaft(121), a short bearing provided on a middle position on the hollow rotatory shaft(121), a ring-shaped stopper provided on a front of the short bearing on the hollow rotatory shaft(121), a clamp(124) provided on a back of the short bearing, a dielectric(126) provided within the clamp(124), and a cable coupling unit(160) provided on a rear thereof.

Description

Joint structure for RF active antenna {Jonit structure for a rotary of a RF active antenna}

The present invention relates to a rotating body coupling device of an RF active antenna, and more particularly, by arranging a rolling bearing and an rolling ring (O) between the first rotating body and the second rotating body. The present invention relates to a rotating body coupling device of an RF active antenna, in which an RF signal is transmitted and an externally uniform power supply is provided.

In general, an active antenna is installed on a moving object such as a car, a ship, or an airplane to actively track and communicate with satellites to provide a high quality satellite reception effect to the users regardless of the location of the vehicle.

Such an active antenna mainly includes a fixed body fixed to a moving object and a rotating body integrally rotatably coupled to the fixed body through a rotary joint device. However, active antennas frequently occur when the rotating body rotates due to contact between the fixed body made of metal and the rotating body, resulting in rapid wear of the metal, which shortens the service life of the connection part and does not properly apply power. Doing so will cause abnormal operation of the antenna and consequently cause problems with the characteristics.

In order to solve this problem, a method of arranging a bearing inside a rotor coupler connected to a coaxial cable has been introduced. As an example, Korean Patent No. 10-0338872 may be mentioned. 4 shows an example of this.

Referring to FIG. 4, the rotating body coupling device according to the related art, that is, the rotary joint 70 mainly includes the rotating part 10 and the fixing part 40, and the rotating part 10 is again the first metal body 11. ) And a first clamp 13 inserted into and coupled to the first metal body 11. The fixing part 40 includes a second metal body 41 and a bearing part 60, a back nut 80, and a bearing part 60 that are inserted into the second metal body 41 and disposed in the second metal body 41. The metal cover 15 is mainly provided for fixing in the body 41.

By the way, the GND (-) signal in the rotary joint of such a configuration is possible by the contact between the metal bodies, but due to the direct contact between the first metal body 11 and the second metal body 41, the seal elapses. Accordingly, the problem of abrasion due to rotation still occurs.

Accordingly, the present invention has been made to solve the conventional problems as described above, the object of the present invention is to prevent the wear caused by the contact between the metal during rotation to extend the life of the product and at the same time stable RF signal and DC current It is to provide a rotary coupling device of the RF active antenna that can be transmitted at the same time.

In order to achieve the above object, the present invention,

A hollow first rotating body having a first inner diameter portion, a second inner diameter portion, a third inner diameter portion, and a fourth inner diameter portion each having a different diameter in adjacent order; And

A hollow rotary shaft, an energized bearing disposed at an intermediate position on the rotary shaft, a ring-shaped stopper disposed in front of the energized bearing on the rotary shaft, and a rear of the energized bearing It provides a rotary coupling device of the RF active antenna, characterized in that it comprises a clamp disposed in the, the dielectric disposed in the radially inner side of the clamp, the second rotating body including a cable coupling disposed in the rear.

Preferably, an electrically conductive O-ring is further disposed between the radially inner surface of the clamp and the radially outer surface of the dielectric intermediate. Metal powder is inherent in the O-ring for electricity.

When the second rotating body is inserted into and coupled to the first rotating body, an inner conductor consisting of a spring and a pin is disposed in the rotating shaft, and the distal end portion of the second rotating body is spaced apart from the radial inner surface of the first inner diameter part by a predetermined distance. There is no metal-to-metal contact.

Preferably, grease having conductivity is applied to the bearing for electricity delivery.

As described above, in the rotating body coupling device of the RF active antenna according to the present invention, by arranging a bearing for energizing and an O-ring for energizing between the first and second rotating bodies, the uniform RF ( RF) signal and uniform power supply.

1 is a partial longitudinal cross-sectional view of a first rotating body for RF active antenna according to the present invention;

2 is a partial longitudinal cross-sectional view of a second rotor for RF active antenna according to the present invention;

3 is a coupled state diagram of the rotating body for the RF active antenna shown in Figures 1 and 2, and

4 is an exploded view of a rotating body coupling device for RF active antenna according to the prior art.

<Description of the symbols for the main parts of the drawings>

10: rotating part 11,41: metal body

13,22,124: clamp 15: metal cover

40: fixed part 60: bearing part

80: back nut 110,120: rotating body

111,112,113,114: inner diameter 121: rotating shaft

122: stopper 126: dielectric

130: energizing bearing 140: O ring

150: inner conductor 160: cable coupling

Hereinafter, with reference to the accompanying drawings will be described in detail the rotor coupling device of the RF active antenna according to a preferred embodiment of the present invention.

1 and 2 illustrate a first and second rotors for RF active antennas according to a preferred embodiment of the present invention, respectively.

1 and 2, the first inner diameter part 111, the second inner diameter part 112, the third inner diameter part 113, and the fourth inner diameter part 111 having different diameters inside the hollow first rotating body 110. The inner diameter 114 is formed adjacent to each other in order. At this time, the first inner diameter portion 111 is tapered so as to gradually taper toward the direction away from the second inner diameter portion 112, that is, toward the front of the first rotating body 110.

The bearing 130 is provided at an intermediate position on the rotary shaft 121 of the second rotating body 120 which is inserted into and coupled to the first rotating body 110 configured as described above. Conventional bearings use non-conductive grease to prevent contact between metals at all, but transmit GND (-) signals only by contact between metals between the rotating and fixed parts of rotary joints. The coated bearing 130 was used to enable stable signal transmission.

The energizing bearing 130 is formed by a ring-shaped stopper 122 disposed in front of the energizing bearing 130 on the hollow rotating shaft 121 and a clamp 124 disposed at the rear of the energizing bearing 130. Are fixedly placed.

At this time, the dielectric 126 is disposed on the radially inner side of the clamp 124, and an electrically conductive O-ring 140 is disposed between the radially inner surface of the clamp 124 and the radial outer surface of the dielectric 126. O (O) ring for electricity 140 is to perform the function of preventing the contact between the metal, it was conventionally made of only silicon rubber material in the present invention imparted conductivity by embedding metal powder therein.

A cable coupling part 160 is disposed at the rear of the second rotating body 120, and the cable coupling part 160 takes a structure bent at an angle of 90 degrees for space utilization. That is, since the cable coupling portion 160 is bent at an angle of 90 degrees, line twist that may occur during rotation operation of the product to which the active antenna is applied is eliminated.

3 illustrates a coupling state between the first and second rotational bodies 110 and 120.

Referring to FIG. 3, a portion of the second rotating body 120 is inserted into the first rotating body 110, and the stopper 122 of the second rotating body 120 is connected to the first rotating body ( Located in the second inner diameter 112 of the 110, the bearing 130 of the second rotating body 120 is located in the third inner diameter 113 of the first rotating body 110, the second rotating body A portion of the clamp 124 of 120 is positioned into the fourth inner diameter 114 of the first rotating body 110.

The front end portion of the second rotating body 120 inserted into the first rotating body 110 is spaced apart from the first inner diameter 111 of the first rotating body 110. That is, the tip portion of the second rotating body 120 is spaced apart from the radially inner surface of the first inner diameter part 111 of the first rotating body 110 to prevent contact between metals.

On the other hand, inside the rotating shaft 121 is disposed an inner conductor 150 consisting of a spring and a pin. The inner conductor 150 has a spring structure to transmit a constant force to the contact between the bearing 130 and the third inner diameter 113 of the first rotating body 110, thereby providing a constant signal between the two conductors Support delivery.

In addition, as described above, the dielectric 126 and the conductive O-ring 140 are disposed in the radially inner side of the clamp 124 of the second rotating body 120 disposed in the first rotating body 110. Power signal is transmitted.

As described above, in the rotating body coupling device of the RF active antenna according to the present invention, internally uniform by arranging an electrically conductive bearing and an o-ring for electricity between the first and second rotating bodies. One RF (RF) signal is transmitted and externally uniform power is supplied. In addition, by arranging the cable coupling portion 160 of the second rotating part 120 at an angle of 90 degrees, line twisting that may occur during operation of the rotated product is removed. In addition, in a conventional rotary joint, the wear phenomenon caused by contact between metals during rotation is fundamentally solved.

In conclusion, in the conventional rotary joint for an active antenna, the drawback of power transmission is not properly made, and a high frequency passive device capable of supplying a uniform RF signal and power is provided.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention described in the claims below. It will be appreciated.

Claims (6)

A hollow first rotating body in which the first inner diameter part 111, the second inner diameter part 112, the third inner diameter part 113, and the fourth inner diameter part 114 each having a different diameter are formed adjacent to each other in order. 110); And Inserted into the first rotating body 110 and coupled, the hollow rotary shaft 121, the energizing bearing 130 disposed in an intermediate position on the rotary shaft 121, the energizing bearing on the rotary shaft 121 ( Ring-shaped stopper 122 disposed in front of 130, clamp 124 disposed at the rear of the bearing 130, dielectric 126 disposed radially inward of the clamp 124, at the rear Rotor coupling device of the RF active antenna, characterized in that it comprises a second rotating body (120) comprising a cable coupling portion disposed. 2. The second rotating body (120) according to claim 1, wherein the second rotating body (120) further includes an electrically conductive o-ring (140) disposed between the radially inner surface of the clamp 124 and the radially outer surface intermediate the dielectric 126. Rotor coupling device of the RF active antenna, characterized in that. 3. The rotating body coupling device of an RF active antenna according to claim 2, wherein metal powder is embedded in the O-ring 140. The apparatus of claim 1, wherein the cable coupling part (160) is bent at an angle of 90 degrees for space utilization. The method of claim 1, wherein the first inner diameter portion 112 is tapered to gradually taper in a direction away from the inner diameter portion 112, the second rotating body 120 is inserted into the first rotating body (110). In this case, the inner shaft 150 made of a spring and a pin is disposed in the rotating shaft 121, and the stopper 122 of the second rotating body 120 is formed of the first rotating body 110. Located in the second inner diameter 112, the energizing bearing 130 of the second rotating body 120 is located in the third inner diameter 113 of the first rotating body 110, A portion of the clamp 124 of the second rotating body 120 is positioned into the fourth inner diameter 114 of the first rotating body 110, and the tip portion of the second rotating body 120 is the first portion. Rotating coupling of the RF active antenna, characterized in that spaced apart from the radial inner surface of the inner diameter portion 111 by a predetermined distance Value. The rotating body coupling device of an RF active antenna according to any one of claims 1 to 5, wherein the conductive bearing (130) is coated with conductive grease.