KR100988549B1 - Rotary joint apparatus having multiple channels for transferring data and electric current - Google Patents

Abstract

PURPOSE: A rotary joint apparatus is provided to simplify a circuit configuration by transmitting current and data through a current supply path and a data supply path. CONSTITUTION: A data transmission unit transmits data from a coaxial cable. A current transmission unit transmits the current. A rotary body(8) has a circular plate shape. A fixing body(1) has a cup shape. A first bearing(13) is arranged between the rotary body and the fixing body. The first bearing connects the rotary body to the fixing body to form a ground path. A second bearing(7) forms a current transmission path of the current transmission unit.

Description

Rotary Joint Apparatus Having Multiple Channels for Transferring Data and Electric Current}

The present invention relates to a rotary joint device for a rotatable active antenna, and to a rotary joint device having a multipath for transmitting data and a current that can simplify a structure while allowing different signals to be transmitted through two transmission paths.

In general, an active antenna system for satellite communication is divided into a fixed part attached to a moving object such as a car or a ship, and a rotating part connected to an antenna body (rotating receiver) which is rotated according to the position of the satellite.

The rotary joint used in the active antenna is a connector that connects the fixed part and the coaxial cable (signal line) of the rotating part. The rotary joint rotates in a direction to obtain an optimal signal when the moving object rotates during the movement of the moving object. It is used to receive a clear satellite signal in real time irrespective of the region and direction by transmitting the satellite signal received from the antenna body (rotation receiver) to a control unit fixedly disposed in the moving body.

Such a rotary joint device of an active antenna of the prior art applies a pair of radial bearings between the rotating part and the fixing part as in the case of Korean Patent Laid-Open No. 2001-0066972 to facilitate such rotation. Although a technique has been proposed, there is a problem in that the connection is unstable and the signal quality is deteriorated because the rotating part and the fixing part are configured to be in point contact through the connection part of the bearing and the body.

In addition, when the rotating body rotates due to the contact between the fixed body made of metal and the rotating body there is a problem that the wear of the metal suddenly occurs, the life of the connecting portion is shortened.

In addition, the rotary joint device connected to the satellite antenna rotates the rotating unit together with the satellite antenna to track the satellite in addition to the data communication line in order to transfer the data received from the satellite antenna, at this time, the drive and antenna of the motor to rotate the antenna There is a need for a power supply line for supplying DC power to an amplifier for amplifying the high frequency signals received from the circuit.

However, since the rotary joint device disclosed in the related art has one rotary shaft and one transmission path, the rotary joint device has to be designed to be connected to a connection cable of several channels in order to transmit data and current, and thus has a large volume and a complicated structure. .

Meanwhile, although a method of simultaneously transmitting current and data through a single transmission line using a power line communication method has been used, a circuit for implementing a technology has a complicated problem.

KR 2001-0066972 A

Accordingly, an object of the present invention is to provide a current supply path and a data supply path at the same time and to transmit data and current respectively without adopting a power line communication method through two transmission paths, so that a circuit configuration can be made simple. It is to provide a rotary joint device having a multi-path that can minimize the assembly to improve the assembly.

According to an aspect of the present invention for achieving the above object, the data transmission means for transferring data transmitted from the coaxial cable; Current transfer means for transferring current; A rotating body having a circular plate shape and having the data transmitting means penetrated therein and supported by the current transmitting means penetrating the peripheral portion; A fixed side body formed in a cup shape and supported by the data transmission means through a central portion thereof, and supported by the current transmission means through a peripheral portion thereof and covering a lower portion thereof in a fixed state; A first bearing rotatably supporting the rotating side body between the rotating side body and the fixed side body and interconnecting the rotating side body and the fixed side body to form a ground path; And a second bearing configured to rotatably support the rotation side body and the fixed side body and to form a current transfer path of the current transfer means.

The data transfer means includes a first pin connected to the rotating side coaxial cable core; A first insulator for supporting the first pin in an insulated state through a through hole of the rotating body; A spring supported by a recess provided in the front end of the first pin; A second pin having a front end coupled to a lower portion of the spring and inserted into a recess of the first pin; A fixed side coaxial cable connection terminal connected to the other end of the second pin; And a second insulator for supporting the coaxial cable connection terminal in an insulated state through the through hole of the fixed side body.

The current transmission means includes a second feed-through projecting out of the fixed side body to receive a current; A fixed side conductor in contact with an inner circumferential surface of the fixed side body to transfer the input current; A second bearing in contact with the upper surface of the fixed side conductor to transfer current from the fixed side conductor and to support the rotatable body rotatably; A rotating side conductor contacting an upper portion of an inner circumferential surface of the second bearing to transfer a current from the second bearing; And a first feedthrough for transferring current from the rotating side conductor to the outside.

A rotating side insulator installed on the rotating side body to insulate the rotating side body adjacent to the rotating side body, and installed on the fixed side body to insulate the fixed side body to support the fixed side conductor. It further includes a fixed side insulator.

A cylindrical cover coupled to the waterproof housing and the waterproof housing for sealing along the outer circumferential surface of the rotating side body further comprises.

The rotating body has a circular plate-shaped flange; A lower protrusion extending below the flange to receive the data transfer means therein; An upper protrusion communicating with the lower protrusion and extending to an upper portion of the flange to receive the data transfer means therein; And a first clamp formed at an end portion of the upper protrusion to introduce a coaxial cable core.

The lower protrusion is formed with a groove for accommodating the first bearing.

The fixed side body has a second clamp formed to enter the coaxial cable core therein; An inner cylinder portion surrounding the second clamp; An outer cylinder portion spaced apart from the inner cylinder portion; And an annular trench is formed between the inner cylindrical portion and the outer cylindrical portion.

The first bearing is supported by a bearing support, and further includes a bearing nut for fixing the bearing support, wherein the inner cylinder portion extends toward the center along an inner circumferential surface thereof, and an inner step portion for accommodating the bearing nut is formed.

The outer cylindrical portion extends toward the center along an inner circumferential surface to form an outer step portion for accommodating the fixed side insulator.

According to another aspect of the invention, the first signal transmitting means for transmitting the first signal; Second signal transmitting means for transmitting a second signal; A rotating side body formed in a circular plate shape and having the first signal transmitting means penetrating through the central portion and the second signal transmitting means penetrating through the peripheral portion; A fixed side body formed in a cup shape and supported by the first signal transmission means through a central portion thereof, and supported by the second signal transmission means through a peripheral portion thereof and covering a lower portion thereof in a fixed state; A first bearing supporting the rotatable body rotatably between the rotatable body and the fixed side body; And a second bearing configured to rotatably support the rotation side body and the fixed side body and to form a current transfer path of the current transfer means.

The first signal is a high frequency data signal, and the second signal is a DC current.

Therefore, the rotary joint device having a multipath of the present invention can transmit data and current on each of two lines, thereby avoiding a complicated circuit configuration by adopting a power line communication method, and improving assembly performance by reducing the number of parts. It provides the effect.

1 is a perspective view of a rotary joint device having a multipath according to an embodiment of the present invention;
2 is an exploded perspective view of the device of FIG. 1, FIG.
3 is a cross-sectional view of the device of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Since the rotary joint device 100 of the present invention has two transmission paths, both currents are transmitted through the two transmission paths or the data is transmitted through the two transmission paths with the body as the ground. It is possible. In the following embodiment, one transmission path transmits data and the other transmission path transfers current.

The rotary joint apparatus of the present invention is applied to a system having a rotating body and a fixed body such as a surveillance camera or a satellite receiver. In the following examples, the present invention is applied to satellite reception devices, for example.

The rotary joint device of the present invention provides a data transmission path for transmitting a high frequency signal received from an active antenna rotating to receive a satellite signal, a power supply for the antenna driving motor, and a power supply for the amplification unit for amplifying the high frequency signal. In order to supply a current carrying path is formed in the upper rotating body.

In addition, the rotary joint apparatus includes a fixed side data transfer path and a fixed side current transfer path connected to the rotating data transfer path and the current transfer path installed in the rotating body in the lower fixed body, and move inside the moving body. Alternatively, the rotating side satellite signal is transmitted to a controller fixed to the inside of the building, for example, a satellite receiver, and a current is transmitted to the rotating body.

1 to 3 are a perspective view, an exploded perspective view, and a cross-sectional view of a rotary joint device having a multipath according to an embodiment of the present invention.

1 to 3, the rotary joint device 100 of the present invention includes a first clamp 8a protruding upward to introduce a rotating coaxial cable and a first feed through for current transfer. Rotating body (8) to cover the upper part to support (17) in a rotating state, the second clamp (1a) protruding downward to enter the fixed coaxial cable core and the second feed-through (6) ), The fixed side body (1) to cover the lower portion to support the fixed state, and the rotary side body (8) and the fixed side body to seal the interior of the rotating body (8) and the fixed side body (1) And a cylindrical cover 19 coupled to the side between the ones.

The rotating side body 8 has a circular plate-shaped flange 8d and a data transmission means (reference numerals 12, 9, 11, 10, 3, 2 of FIG. 3) forming a data transmission path which will be described below. A lower protrusion 8b extending downwardly of the flange 8d, and extending upwardly of the flange 8d to form a first clamp 8a at the distal end thereof so as to accommodate a portion of the flange 8d. 12, 9, 11, 10, 3, and 2 includes an upper protrusion 8c for receiving a portion therein.

The lower protrusion 8b has an inner cylindrical portion 8g and an outer cylindrical portion 8h for receiving a data transmission path at its inner circumference, and has a recess 8f between the inner cylindrical portion 8g and the outer cylindrical portion 8h. Is formed.

In addition, a first feedthrough 17 is coupled to the rotating body 8 to form a current transmission path protruding from the through hole 17a on one side of the flange 8d.

A ring-shaped waterproof housing 18 is coupled to the outer peripheral surface of the flange 8d of the rotating body 8 in a sealed state, and a cylindrical cover 19 is coupled to surround the outer circumference of the waterproof housing 18. Here, the waterproof housing 18 is in contact with the side of the rotating body 8, in addition to the role of the sealing serves to reduce the frictional resistance when the rotating body 8 rotates.

A cylindrical rotating side insulator 15 is fitted to the outer circumferential surface of the outer cylindrical portion 8h of the rotating side body 8 so as to transmit data of the rotating body 8 (reference numerals 12, 9, 11, 10, 3, 2) and the first feed-through 17 to separate the current transfer path.

The first ball bearing 13 is coupled to the groove 8f of the rotational body 8, that is, the outer circumferential surface of the inner cylindrical portion 8g, and the bearing nut 14 is fastened to the inner cylindrical portion 8g so that the first ball bay is engaged. The ring 13 is fixed. At this time, the inner bearing support 13b of the first ball bearing 13 rotates together with the rotating side body 8 according to the fixing of the bearing nut 14, and the outer bearing support 13a of the fixed side body 1 It is fixed to the outer cylindrical part 1c.

In addition, the outer circumferential surface of the rotating insulator 15 is fitted to the rotating side conductor 16 to be connected to the first feedthrough 17, and the rotating side conductor 16 is an inner bearing of the second bearing 7 which will be described later. It rotates with the rotating side body 8 in contact with the support 7b to form a current transfer path.

On the other hand, the fixed side body 1 is coupled to the second feed-through (6) for projecting the current to the outside through the through hole (6a) formed on the side in the cup shape, the lower side of the second coaxial cable is coupled The clamp 1a is formed to protrude.

The fixed side body 1 has an outer cylindrical portion 1d formed in the shape of a cup, and has an inner cylindrical portion 1c having a central portion protruding to form an annular trench structure.

The inner cylindrical portion 1h has a central portion penetrated therein, and includes a data transmission means (reference numerals 12, 9, 11, 10, 3, and 2 in FIG. 3), and a second clamp 1a into which a coaxial cable is inserted. Is formed in the center.

An annular trench 1b is formed between the inner cylindrical portion 1c and the outer cylindrical portion 1d. An inner stepped portion 1e is formed on the tip portion extending toward the center on the inner circumferential surface of the inner cylindrical portion 1c, and an outer stepped portion 1g extending toward the center is formed on the inner circumferential surface of the outer cylinder portion 1d.

A cylindrical fixed side insulator 4 is coupled to the outer step 1g inside the trench 1b, and a fixed side conductor 5 is coupled to the lower inner peripheral surface of the fixed side insulator 4. One end of the fixed side conductor 5 is connected to the second feedthrough 6 to form a current transfer path.

At this time, the fixed side conductor 5 is fitted to the inner circumferential surface of the fixed side insulator 4 and the upper surface of the fixed side conductor 5 is fixed in contact with the outer bearing support 7a of the second ball bearing 7. .

That is, the outer bearing support 7a of the second ball bearing 7 is fixed to the inner circumferential surface of the fixed side insulator 4 and the upper side of the fixed side conductor 5, and the inner bearing support below the outer circumferential surface of the rotating side insulator 15. (7b) is fixed.

Accordingly, the rotating insulator 15 is in contact with the inner circumferential surface of the inner bearing support 7b, and the fixed side insulator 4 is in contact with the outer circumferential surface of the outer bearing support 7a so that the current transmission path is electrically separated from the data transmission path. The rotation side body 8 is rotated together with the inner bearing support 7b.

At this time, the plurality of balls and the bearing support (7a, 7b) of the second ball bearing 7 forms a current transfer path connecting the fixed side conductor 5 in contact with the bottom and the rotating side conductor 16 in contact with the top. Thus, the current input to the second feedthrough 6 is transmitted to the outside by the first feedthrough 17.

That is, in the current transfer path, the current input to the second feedthrough 6 passes through the bearing supports 7a and 7b for receiving the second ball bearing 7 via the fixed side conductor 5, and then the rotating side conductor. After being delivered by (16), it is supplied to the outside by the first feedthrough (17).

Accordingly, the current transfer means between the rotor body 8 and the stationary body 1 includes a first feedthrough 17, a rotation side conductor 16, a second ball bearing 7, and a fixed side conductor ( 5) and the second feedthrough 6.

Referring to FIG. 3, when the rotatable body 8 and the fixed side body 1 are coupled to each other, the center portion accommodates the data transfer means 12, 9, 11, 10, 3, and 2 forming a data transfer path therein. In order to communicate with the hollow portion (H) is formed.

The data transmission means 12, 9, 11, 10, 3, and 2 inserted into the hollow portion H between the first clamp 8a and the second clamp 1a are rotated inserted into the first clamp 8a. The first pin 12 for signal transmission for connecting the core of the side coaxial cable (not shown), and the hollow portion (H) formed integrally with the first pin 12 for insulation from the rotating body (8) A signal connected to the first insulator 9 inserted into the spring 11, a spring 11 having one end tipped into the recess of the first pin 12, and a first pin 12 below the spring 11. A second pin 10 for delivery is included. In addition, the data transmission means is formed integrally with the fixed side coaxial cable coupling terminal 3 and the coaxial cable coupling terminal 3 connected to the lower side of the second pin 10 for signal transmission, A second insulator 2 is inserted into the hollow portion H for insulation. Here, the fixed side coaxial cable coupling terminal 3 is composed of a fork coupling terminal, and the fixed side coaxial cable core is connected.

Here, the stepped portion 8e is formed inside the hollow portion H of the rotating body 8 to accommodate the first insulator 9, and the fixed side body 1 to accommodate the second insulator 2. Steps 1f are formed inside the hollow portion H.

Hereinafter, the operation of the rotary joint device of the present invention configured as described above will be described.

The rotating side and fixed side coaxial cables control data signals received from the rotating body as each core is led into two clamps 8a and 1a and connected to the first pin 12 and the second pin 3, respectively. The shield wire (not shown) of each coaxial cable is fixed to the outer circumferential surfaces of the clamps 8a and 1a, and the first shield wire fixed to the first clamp 8a is the upper protrusion 8c. It is connected to the second shield wire fixed to the second clamp (1a) of the fixed side body (1) through the rotating side body 8 and the first ball bearing 13 through the ground path.

In addition, the high frequency signal (data) input from the active antenna is transmitted by the data transmission means, the data transmission path of which is the rotating side coaxial cable core (not shown) inserted into the first clamp 8a, the signal transmission agent. A coaxial cable core is connected to a fixed side coaxial cable coupling terminal (3) connected to a lower portion of the second pin (10), consisting of 1 pin (12), a spring (11), and a second pin (10) for signal transmission. The high frequency signal (data) is transmitted to the outside.

The coupling structure of the first pin 12, the spring 11 and the second pin 10 is fixed to the fixed side body 1 even if the rotating body 8 is rotated together with the first pin 12 An electrical connection structure is formed on the second pin 10.

As described above, in the present invention, the rotation side body 8 is rotatable to the fixed side body 1 by a first ball bearing 13 forming a ground path and a second ball bearing 7 forming a current transfer path. The rotating side coaxial cable, which is supported and coupled to the first clamp 8a, has a fixed side coaxial with a core (not shown) coupled to the second clamp 1a of the fixed side body 1 to transmit a high frequency signal through data transmission means. It transmits to the coaxial cable core of a cable, and outputs an electric current through a current transmission path between the 2nd feedthrough 6 and the 1st feedthrough 17.

According to the present invention, it is possible to transmit a high frequency signal (data) and current from the antenna through the respective transmission paths in a rotatable state, so that the signal transmission circuit can be easily configured, and in addition to the combination of data and current, Alternatively, a combination of current and current may be transmitted.

The present invention is applicable to a rotary joint device capable of transmitting multiple signals between a rotating body and a fixed body, such as an active antenna system for satellite communication or a surveillance camera capable of rotating 360 degrees.

1: fixed side body 2: second insulator
3: coaxial cable coupling terminal 4: fixed side insulator
5: fixed side conductor 17,6: first and second feed-through
13,7: first and second ball bearings 7a, 7b, 13a, 13b: bearing support
8: Rotating Side Body 9: First Insulator
12,10: first and second pin 11: spring
14: Bearing Nut 15: Rotating Side Insulator
16: rotating side conductor 18: waterproof housing
19: cover

Claims (12)

Data transfer means for transferring data transmitted from the coaxial cable;
Current transfer means for transferring current;
A rotating body having a circular plate shape and having the data transmitting means penetrated therein and supported by the current transmitting means penetrating the peripheral portion;
A fixed side body formed in a cup shape and supported by the data transmission means through a central portion thereof, and supported by the current transmission means through a peripheral portion thereof and covering a lower portion thereof in a fixed state;
A first bearing rotatably supporting the rotating side body between the rotating side body and the fixed side body and interconnecting the rotating side body and the fixed side body to form a ground path; And
And a second bearing for rotatably supporting the rotating side body and the fixed side body to form a current transfer path of the current transfer means. The method of claim 1,
The data transfer means
A first pin connected to the rotating side coaxial cable core;
A first insulator for supporting the first pin in an insulated state through a through hole of the rotating body;
A spring supported by a recess provided in the front end of the first pin;
A second pin having a front end coupled to a lower portion of the spring and inserted into a recess of the first pin;
A fixed side coaxial cable connection terminal connected to the other end of the second pin; And
And a second insulator for supporting the coaxial cable connection terminal in an insulated state through a through hole of the fixed side body. The method of claim 1,
The current transfer means
A second feed through projecting outside of the fixed side body to receive a current;
A fixed side conductor in contact with an inner circumferential surface of the fixed side body to transfer the input current;
A second bearing in contact with the upper surface of the fixed side conductor to transfer current from the fixed side conductor and to support the rotatable body rotatably;
A rotating side conductor contacting an upper portion of an inner circumferential surface of the second bearing to transfer a current from the second bearing; And
And a first feed-through for transferring current from the rotating side conductor to the outside. 4. The rotating side insulator of claim 3, wherein the rotating side insulator is provided on the rotating side body to insulate the rotating side body, and the fixed side body is insulated from the fixed side body. The rotary joint device further comprises a fixed side insulator supporting the fixed side conductor. The rotary joint device according to claim 1, further comprising a cylindrical cover coupled to the waterproof housing and the waterproof housing for sealing along the outer circumferential surface of the rotating body. The method of claim 1, wherein the rotating body is
Circular plate-shaped flanges;
A lower protrusion extending below the flange to receive the data transfer means therein;
An upper protrusion communicating with the lower protrusion and extending to an upper portion of the flange to receive the data transfer means therein; And
And a first clamp formed at an end of the upper protrusion to introduce a coaxial cable core. The rotary joint device of claim 6, wherein the lower protrusion has a recess for accommodating the first bearing. The method of claim 4, wherein the fixed side body is
A second clamp configured to introduce a coaxial cable core into the interior;
An inner cylinder portion surrounding the second clamp;
An outer cylinder portion spaced apart from the inner cylinder portion; And
And an annular trench formed between the inner cylindrical portion and the outer cylindrical portion. The method of claim 8, wherein the first bearing is supported by a bearing support, and further comprises a bearing nut for fixing the bearing support, the inner cylinder portion is extended toward the center along the inner peripheral surface, for receiving the bearing nut Rotary joint device, characterized in that the inner step is formed. 9. The rotary joint apparatus according to claim 8, wherein the outer cylindrical portion extends toward the center along an inner circumferential surface to form an outer step portion for accommodating the fixed side insulator. First signal transmitting means for transmitting a first signal;
Second signal transmitting means for transmitting a second signal;
A rotating side body formed in a circular plate shape and having the first signal transmitting means penetrating through the central portion and the second signal transmitting means penetrating through the peripheral portion;
A fixed side body formed in a cup shape and supported by the first signal transmission means through a central portion thereof, and supported by the second signal transmission means through a peripheral portion thereof and covering a lower portion thereof in a fixed state;
A first bearing supporting the rotatable body rotatably between the rotatable body and the fixed side body; And
And a second bearing for rotatably supporting the rotating side body and the fixed side body to form a current transfer path of the current transfer means. 12. The rotary joint apparatus according to claim 11, wherein the first signal is a high frequency data signal and the second signal is a DC current.

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