KR20090108974A - Rotary joint apparatus for active antenna - Google Patents

Abstract

PURPOSE: A rotary joint apparatus for an active antenna is provided to extend lifetime by minimize abrasion due to each contact pin. CONSTITUTION: A rotary joint apparatus for an active antenna is composed of a body portion(200), a rotating unit(100), a thrust bearing(400), and an elastic member(500). The body portion is mounted on the moving body, and the body portion is electrically connected to a receiving device. A rotating unit is combined with the body portion electrically and it is reverse-rotatable to the body portion. The rotating unit is electrically connected to an antenna module, and the thrust bearing supports the axial weight of the rotating unit.

Description

Rotary Joint Device {ROTARY JOINT APPARATUS FOR ACTIVE ANTENNA}

The present invention relates to a rotary joint apparatus, and more particularly, to a rotary joint apparatus capable of stably maintaining an alignment state between components and improving stability and reliability.

In general, active antennas for satellite communication for receiving satellite signals and the like are installed in a moving object such as a ship or an airplane. The active antenna is rotatably installed so that the active antenna can be disposed in a proper direction toward the satellite regardless of the region and the direction of movement.

In addition, in the active antenna rotatably installed in the movable body as described above, a rotary joint device for electrical connection with a receiving device is used.

In general, the rotary joint device is configured to include a body portion and a rotating portion coupled to be relatively rotatable in an electrically connected state. The body portion is fixedly installed on the movable body so as to be electrically connected to a receiving device provided on the movable body, and the rotating portion is rotatably coupled to the body portion to be electrically connected to the antenna so as to rotate about the body portion as the antenna rotates. Can be.

In addition, the electrical connection of the rotating portion and the body portion may be made through the male and female connecting pins provided in the rotating portion and the body portion, respectively, and the antenna is properly connected along the satellite while being electrically connected to the receiving device through the rotary joint device. Can be rotated.

On the other hand, the alignment state of the rotating part relative to the body portion in the rotary joint device has a great influence on the stability and reliability between the parts. That is, when the rotating part rotates in a twisted state with respect to the body part, there is a problem that a rapid wear occurs between the parts, and the connection failure occurs at the contact point between the rotating part and the body part, so the rotating part is aligned upright with respect to the body part. It must be able to be maintained.

However, conventionally, as the rotating part is rotatably coupled to the body part without consideration for maintaining the alignment of the rotating part with respect to the body part, the body part may be affected by the influence of the rotating part's own weight and unintended impact. When the alignment state of the rotating part is distorted, rapid wear occurs between the parts, and there is a problem in that connection failure occurs at the contact point of the rotating part and the body part.

In addition, the contact state of the contact electrically connecting the rotating part and the body part in the rotary joint device has a great influence on the quality of the transmission signal. In other words, if the connection resistance increases at the contact point of the rotating part and the body part, or a connection defect occurs, the satellite signal transmitted to the rotating part may not be transmitted smoothly to the body part, and thus the contact between the rotating part and the body part may maintain a stable contact state. Should be

However, conventionally, as the male connecting pin is configured to be received in contact with the inside of the recess of the female connecting pin, sparks are generated when the male connecting pin is rotated, and soot is formed in the contact portion. As a result, there is a problem in that the connection resistance of the contact portion is increased or a connection failure occurs due to the sooting, and satellite signals are not transmitted smoothly.

Moreover, in the case of the existing rotary joint device, it is difficult to increase the machining accuracy of the contact portion between the male connecting pin and the female connecting pin more than a certain amount, and the female connecting pin rotates together with other parts by rotating the male connecting pin. There is a problem that interference and wear occurs, thereby shortening the life of the contact.

In order to remedy this problem, some countermeasures have recently been proposed to improve the stability and reliability of the rotary joint apparatus, but are still insufficient.

The present invention can stably maintain the alignment between parts, and provides a rotary joint device that can improve stability and reliability.

In addition, the present invention can improve the contact reliability and stability of the contact, and provides a rotary joint device that can minimize the loss of the transmission signal.

In addition, the present invention provides a rotary joint device that can reduce costs and improve productivity.

The present invention also provides a rotary joint device capable of extending the life of the device.

According to a preferred embodiment of the present invention for achieving the above object of the present invention, the rotary joint device is mounted on the movable body and is electrically connected to the receiving device, the body portion in a state electrically connected to the body portion A rotatable couple rotatably coupled and electrically connected to the antenna module, a thrust bearing provided to support an axial load of the rotating unit, and an elastic member interposed between the thrust bearing and the body to elastically support the thrust bearing.

The electrical connection structure of the body part and the rotating part can be variously changed according to the required conditions and design specifications. For example, the rotating part may include a first connecting pin electrically connected to the antenna module, and the body part includes a second connecting pin contacting the first connecting pin, and the connecting contact part electrically connected to the receiving device. It may be provided.

The rotating part may further include a flange part extended on one side of the circumferential surface, and the thrust bearing may support the bottom surface of the flange part. In some cases, the thrust bearing may be configured to directly support the bottom of the rotating part, excluding a separate flange part.

In addition, a radial bearing for supporting the radial load of the rotating part together with the thrust bearing may be used simultaneously, and in some cases, only the thrust bearing may be used alone.

According to another preferred embodiment of the present invention, the rotary joint device is a body portion mounted on the moving body, the rotatable portion coupled to the body portion and rotatably rotated with the antenna module, mounted on the rotating portion and electrically connected to the antenna module A first contact pin and a second contact pin disposed to face the first contact pin, the contact part being electrically connected to the receiver and formed of an electrically conductive material, including the first contact pin and the second contact pin. And a connecting ball interposed between the connecting pins in a rolling contact, a thrust bearing provided to support the axial load of the rotating part, and an elastic member interposed between the thrust bearing and the body part to elastically support the thrust bearing.

The structure and manner of the connection contact portion having the second connection pin may be variously changed according to the required conditions and design specifications. For example, the second connecting pin may be installed to be accessible and spaced apart from the first connecting pin, and the connection contact portion may include a conductive elastic member that provides an elastic force to move in the direction in which the second connecting pin approaches the first connecting pin. It may include.

The structure and shape of the first connecting pin and the second connecting pin in contact with the connection ball can be variously changed according to the required conditions and design specifications. As an example, the first connecting pin and the second connecting pin may be formed in a substantially conical shape so that each of the nipples may face each other, and the connection ball may be in contact with each inclined conical surface of the first connecting pin and the second connecting pin. Can be deployed.

The conical surface angle and the size of the connection ball of the first connecting pin and the second connecting pin can be variously changed according to the required conditions and design specifications. In some cases, the first connecting pin and the second connecting pin may be configured to have different conical surface angles.

In addition, only one connection ball may be provided, as well as a plurality of first connection pins and the second connection pins may be provided so that a multi-point contact. Preferably at least three connection balls may be provided.

According to the rotary joint device according to the present invention, the axial load of the rotating portion rotatably coupled to the body portion can be supported by the thrust bearing elastically supported by the elastic member, thereby aligning the rotating portion with respect to the body portion The state can be maintained in a stable state, and the contact and wear between parts due to the torsion can be minimized, and the stability and reliability can be improved. Moreover, since the thrust bearing can support the rotating part in a state elastically supported by the elastic member, the axial load of the rotating part can be evenly distributed and supported even in the state where the rotating part is twisted.

In addition, according to the present invention, the electrical connection between the first connecting pin and the second connecting pin can be made by the rolling ball interposed between the first connecting pin and the second connecting pin so that the rolling contact, reliability and stability It can improve and minimize the loss of the transmission signal.

In addition, according to the present invention, unlike the existing male / female connecting pins, precision machining can be excluded in processing the connecting pins, thereby facilitating processing, reducing costs, and improving productivity.

In addition, according to the present invention there is an effect that can minimize the wear caused by the contact of each connecting pin and extend the life.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and may be described by quoting the contents described in other drawings under the above rules, and the contents repeated or deemed apparent to those skilled in the art may be omitted.

1 is a perspective view showing the structure of a rotary joint device according to the present invention, Figure 2 is an exploded perspective view showing the structure of a rotary joint device according to the present invention. 3 is a cross-sectional view showing the structure of a rotary joint device according to the present invention, Figure 4 is a rotary joint device according to the present invention, a view for explaining the structure of the contact portion.

As shown in FIGS. 1 to 4, the rotary joint device according to the present invention is a conventional antenna module (for example, a directional satellite antenna module) rotatably installed on a moving body (not shown) such as a ship or an airplane ( It is provided to electrically connect the receiver and the receiver, and includes a body part 200, a rotating part 100, a thrust bearing 400, and an elastic member 500.

The body portion 200 is formed to have a predetermined receiving space therein the upper opening is mounted on the moving body. The body part 200 may be mounted on the movable body through a conventional fastening member such as a bolt, and may be fixedly mounted on the movable body by other conventional coupling methods in some cases.

The rotating part 100 is opened to have a predetermined receiving space therein and is rotatably coupled to the body part 200, and rotates with respect to the body part 200 together with the antenna module as the antenna module rotates. Can rotate The rotating part 100 may be rotatably coupled to the body part 200 via a cover 210 fastened to the upper part of the body part 200. And, between the body portion 200 and the cover 210, a normal lady for supporting the radial direction (direction perpendicular to the axial direction of the rotating portion) of the rotating portion 100 and rotatably supporting the rotating portion 100 A radial bearing 240 may be interposed.

In addition, the rotating part 100 may be rotatably coupled to the body part 200 in an electrically connected state with the body part 200, and an electrical connection structure between the body part 200 and the rotating part 100 is provided. Various changes may be made depending on required conditions and design specifications.

As an example, the rotating part 100 may be provided with a first connecting pin 120 electrically connected to the antenna module, and the body part 200 may have a second connecting pin contacting the first connecting pin 120. Including a 222 may be provided with a connection contact portion 220 that is electrically connected to the receiving device.

The first connecting pin 120 is formed of a conventional metallic material capable of electric conduction (electric conduction) is mounted on the rotating part 100, the upper end of the first connecting pin 120 is an antenna module rotatably mounted on the moving body Is electrically connected to the

The first connecting pin 120 may be directly mounted on the rotating part 100, but when the rotating part 100 is formed of a metal material, the rotating part 100 may be formed through an insulating bushing 130 formed of a conventional insulating material. 100). In addition, the electrical connection between the first connection pin 120 and the antenna module may be made through a common coaxial cable, and in some cases, other connection members may be used.

The connection contact portion 220 is mounted to the body portion 200 including a second connection pin 222 disposed to face the first connection pin 120, the lower end of the connection contact portion 220 is on the movable body It is electrically connected to a conventional receiver (not shown) provided in the.

The structure and manner of the connection contact portion 220 having the second connection pin 222 may also be variously changed according to required conditions and design specifications. Hereinafter, the connection contact part 220 has a connection socket 226 having an accommodation space therein, and a second connection pin accommodated inside the connection socket 226 so as to be accessible and spaced apart from the first connection pin 120. 222, a conductive elastic member 224 provided at a rear side of the second connecting pin 222 to provide an elastic force to move in the direction in which the second connecting pin 222 approaches the first connecting pin 120. And a connection ball 300 interposed between the first connection pin 120 and the second connection pin 222 so as to be in contact with the cloud. In addition, the contact state between the first connecting pin 120, the connection ball 300 and the second connecting pin 222 may be elastically maintained by the conductive elastic member 224.

The second connection pin 222 is formed of a conventional metallic material that can be energized, and the connection contact portion 220 including the connection pocket, the second connection pin 222 and the conductive elastic member 224 is also electrically connected to each other. It means one whole whole. The connection contact portion 220 may be mounted on the body portion 200 via an insulation bushing 230 made of a common insulation material in the same manner as the first connection pin 120, the connection contact portion 220 And the electrical connection between the receiver and the receiver can be made via a conventional coaxial cable. The electrical connection structure and method of the connection contact unit 220 and the receiver may be variously changed according to required conditions and design specifications, and the present invention is not limited or limited by the structure and method.

The connection ball 300 is formed in a spherical shape of a conventional metal material that can be energized, and is interposed between the first connection pin 120 and the second connection pin 222 so as to be able to make a cloud contact. That is, the connection ball 300 is interposed between the first connection pin 120 and the second connection pin 222 so as to be in contact with the cloud electrically connected to the antenna module and the first contact pin 120 A receiving device electrically connected to 220 may be electrically connected.

That is, the connection ball 300 is the first connecting pin (120) in contact with the first connecting pin 120 and the second connecting pin 222 as the first connecting pin 120 connected to the antenna module rotates ( It may be a cloud motion between the 120 and the second connecting pin (222). Such a structure makes it possible to minimize the frictional resistance at the mutual contact portion of the first connecting pin 120 and the second connecting pin 222, and to prevent the occurrence of sparking at the contact portion, thereby increasing the connection resistance due to soot. And to prevent connection failure and consequently to deteriorate transmission performance.

Furthermore, since the second connection pin 222 is electrically connected to the first connection pin 120 through the connection ball 300 rolling without rolling directly in contact with the rotating first connection pin 120. When the connecting pin 120 rotates, the second connecting pin 222 may be prevented from rotating together.

On the other hand, the structure and shape of the first connecting pin 120 and the second connecting pin 222 in contact with the connection ball 300 may be variously changed according to the required conditions and design specifications. For example, the first connecting pin 120 and the second connecting pin 222 may be formed in a substantially conical shape so that each of the stems face each other, the connection ball 300 is the first connecting pin 120 ) And the second inclined conical surface of the second connecting pin 222 may be disposed so as to make a cloud contact.

Such a structure allows the connecting ball 300 interposed between the first connecting pin 120 and the second connecting pin 222 to perform rolling motion along a regular path without irregular flow, and It can improve the reliability. That is, the connection ball 300 is guided by the inclined conical surfaces of the first connecting pin 120 and the second connecting pin 222 and the center of the first connecting pin 120 and the second connecting pin 222. The rolling motion can be stably performed along a predetermined path without being irregularly flowed toward the site (top).

In addition, such a structure allows foreign substances that may exist at each contacting portion of the first connecting pin 120 and the second connecting pin 222 to which the connecting ball 300 is contacted and flow down along the conical surface. It is possible to prevent connection failures and transmission performance caused by delays.

The cone surface angle and the size of the connection ball 300 of the first connection pin 120 and the second connection pin 222 can be changed in various ways depending on the requirements and design specifications, the cone surface angle and the connection ball 300 The present invention is not limited or limited by the size of. In some cases, the first connecting pin 120 and the second connecting pin 222 may be configured to have different conical surface angles.

On the other hand, the above-described connection ball 300 may be provided with only one, as well as a plurality of the first connection pin 120 and the second connection pin 222 may be provided with a plurality of points (multi) contact. have. Preferably, at least three connection balls 300 may be provided to maintain more stable transmission performance with the first connection pin 120 and the second connection pin 222.

In the above-described and illustrated embodiments of the present invention, the first connection pin 120, the second connection pin 222, and the connection ball 300 are electrically connected between the body part 200 and the rotation part 100. Although a configuration example has been described, in some cases, other conventional contact methods as well as a contact method using existing and male / female connection pins may be employed.

On the other hand, the thrust bearing 400 is provided to support the axial load of the rotating part (100). As the thrust bearing 400, a conventional bearing such as a ball bearing, a roller bearing, or the like may be used, and the present invention is not limited or limited by the type and characteristics of the thrust bearing 400.

As described above, the thrust bearing 400 supporting the axial load of the rotating part 100 may be configured to support a specific portion of the rotating part 100 according to the required conditions and design specifications. For example, one side of the circumferential surface of the rotating part 100 may be formed with a flange portion 110 is formed to have an extended diameter, the thrust bearing 400 to support the bottom surface of the flange portion 110 Can be. In some cases, the thrust bearing 400 may be configured to support the bottom surface of the rotating part 100 as well as other parts except for a separate flange part.

The elastic member 500 is interposed between the thrust bearing 400 and the bottom surface of the body portion 200 to elastically support the thrust bearing 400. That is, the elastic member 500 elastically supports the bottom surface of the thrust bearing 400 and provides an elastic force so that the thrust bearing 400 moves in a direction approaching the bottom surface of the rotating part 100.

As the elastic member 500, a conventional spring may be used, and various conventional elastic members 500 may be applied according to a required condition. In the above-described and illustrated embodiments of the present invention, an example in which the thrust bearing 400 is elastically supported by only one coil spring is described. However, in some cases, a plurality of coil springs having different winding diameters may be used. The thrust bearing can be configured to be supported by, and other elastic support structures can be employed.

Such a structure allows the axial load due to the weight of the rotating part 100 to be properly distributed and relaxed by the elastic member 500 and the thrust bearing 400, and the rotating part 100 is more stably provided by the body part 200. It can be rotated about). In particular, since the thrust bearing 400 can support the rotating part 100 while being elastically supported by the elastic member 500, the axial load of the rotating part 100 is increased even when the rotating part 100 is twisted. It can be evenly distributed and supported.

In addition, the elastic member 500 and the thrust bearing 400 allows the rotating part to be self-aligned when the alignment of the rotating part with respect to the body part is distorted due to the influence of the rotating part's own weight and unintended impact. In addition, it minimizes contact and wear between parts due to torsion and improves stability and reliability.

Meanwhile, in the above-described and illustrated embodiments of the present invention, the radial bearing 240 for supporting the radial load of the rotating part 100 together with the thrust bearing 400 is described by way of example. Thus, only thrust bearings can be employed alone.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

1 is a perspective view showing the structure of a rotary joint device according to the present invention.

Figure 2 is an exploded perspective view showing the structure of a rotary joint device according to the present invention.

3 is a cross-sectional view showing the structure of a rotary joint device according to the present invention.

Figure 4 is a rotary joint device according to the present invention, a view for explaining the structure of the contact portion.

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

100: rotation part 120: first connection pin

130, 230: insulation bushing 200: body

210: cover 220: connection contact

222: second connection pin 224: conductive elastic member

226 connection socket 240 radial bearing

300: connection ball 400: thrust bearing

500: elastic member

Claims (8)

In the rotary joint device for electrically connecting the antenna module and the receiving device rotatably installed on the moving body, A body part mounted on the movable body and electrically connected to the receiver; A rotating part electrically coupled to the body part in a state of being electrically connected to the body part and electrically connected to the antenna module; A thrust bearing provided to support an axial load of the rotating part; And An elastic member interposed between the thrust bearing and the body portion to elastically support the thrust bearing; Rotary joint device comprising a. In the rotary joint device for electrically connecting the antenna module and the receiving device rotatably installed on the moving body, A body portion mounted on the movable body; A rotatable portion rotatably coupled to the body portion and rotating together with the antenna module; A first connection pin mounted to the rotating part and electrically connected to the antenna module; A connection contact portion mounted to the body portion and including a second connection pin disposed to face the first connection pin and electrically connected to the receiving device; A connection ball interposed between the first connection pin and the second connection pin to enable rolling contact; A thrust bearing provided to support an axial load of the rotating part; And An elastic member interposed between the thrust bearing and the body portion to elastically support the thrust bearing; Rotary joint device comprising a. The method of claim 2, The first connecting pin and the second connecting pin is formed in a conical shape is arranged so that the stem parts face each other, The connection ball is a rotary joint device, characterized in that the rolling contact with each inclined conical surface of the first connecting pin and the second connecting pin. The method of claim 2, And a plurality of connection balls are provided such that the first connection pin and the second connection pin are in multi-point contact. The method of claim 4, wherein Rotary joint device, characterized in that the connection ball is provided with at least three. The method of claim 2, The second connecting pin is installed to be accessible and spaced apart from the first connecting pin, The connection contact portion further comprises a conductive elastic member for providing an elastic force to move in the direction in which the second connecting pin is approaching the first connecting pin. The method according to claim 1 or 2, The rotating part further includes a flange portion formed to extend on one side of the circumferential surface, The thrust bearing is a rotary joint device, characterized in that for supporting the bottom surface of the flange. The method according to claim 1 or 2, And a radial bearing provided between the body portion and the rotating portion to support a radial load of the rotating portion.

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