CN112510455A

CN112510455A - Video slip ring

Info

Publication number: CN112510455A
Application number: CN202011485382.3A
Authority: CN
Inventors: 郭治军; 钟江英; 杨佳欣
Original assignee: AVIC Beijing Precision Engineering Institute for Aircraft Industry
Current assignee: AVIC Beijing Precision Engineering Institute for Aircraft Industry
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-16

Abstract

The invention relates to a video slip ring, which comprises an outer cover, a bracket, a first spacer ring, a second spacer ring, a shielding ring, a ring piece, a shaft sleeve, a core shaft, a sleeve, a brush holder plate and a U-shaped plate, wherein the bracket, the first spacer ring, the second spacer ring, the shielding ring, the ring piece, the shaft sleeve, the core shaft, the sleeve; the support is fixed in the outer cover, the mandrel is cylindrical and is arranged on the support in a coaxial mode with the outer cover, the shaft sleeve is arranged on the mandrel, the sleeve shaft is arranged on the shaft sleeve, and the first spacing ring, the second spacing ring, the shielding rings and the ring sheets are arranged on the sleeve shaft at intervals; a plurality of shielding rings are arranged between the first spacing ring and the second spacing ring at intervals in sequence, the ring piece is located between two adjacent shielding rings, the sleeve is embedded in the mandrel and forms a ring lead cavity with the mandrel, and the U-shaped plate is arranged on the inner wall of the outer cover in a mode that the opening faces the inner wall of the outer cover and forms a brush lead cavity with the inner wall of the outer cover. The video slip ring aims to solve the problems of crosstalk and poor picture definition caused by poor isolation of the video slip ring.

Description

Video slip ring

Technical Field

The invention relates to the technical field of signal rotation transmission, in particular to a video slip ring.

Background

The electric power and signal transmission is realized by the relative rotation of the rotor part and the stator part of the electric conduction slip ring, and the indexes for evaluating the performance of the electric conduction slip ring mainly comprise insulation resistance, dielectric strength, static contact resistance, dynamic contact resistance variation, friction torque, instantaneous interruption, isolation, reliability and service life.

The video slip ring is used as a key device for the video signal rotary transmission of military products such as ship-borne radars, vehicle-mounted radars, unmanned planes and photoelectric pods, the quality of the video signal transmission directly influences the performance of weaponry, and therefore the video slip ring has to be guaranteed to have higher isolation degree, and the high-quality rotary transmission of the video signal can be realized. All the video lines can transmit signals with wider bandwidth because the video lines are surrounded into a metal cavity by a layer of almost completely closed metal shielding net on the outer layer of the video lines, so that the signals can be transmitted without interference.

Accordingly, the inventors provide a video slipring.

Disclosure of Invention

(1) Technical problem to be solved

The embodiment of the invention provides a video slip ring, wherein a ring occupied by a video wire core wire is arranged between a left shielding ring and a right shielding ring, the shielding of a video wire is respectively connected to the two shielding rings, the ring occupied by the video wire is positioned on a sleeve shaft, and meanwhile, in the implementation process, a ring lead and a brush lead of a conductive slip ring are respectively isolated, so that the technical problems of crosstalk and poor picture definition caused by poor isolation of the video ring are solved.

(2) Technical scheme

The embodiment of the invention provides a video slip ring, which comprises an outer cover, a bracket, a first spacer ring, a second spacer ring, a shielding ring, a ring piece, a shaft sleeve, a core shaft, a sleeve, a brush holder plate and a U-shaped plate, wherein the bracket, the first spacer ring, the second spacer ring, the shielding ring, the ring piece, the shaft sleeve, the core shaft, the sleeve, the;

the support is fixed in the outer cover, the mandrel is cylindrical and is arranged on the support in a coaxial mode with the outer cover, the shaft sleeve is arranged on the mandrel, the sleeve shaft is arranged on the shaft sleeve, and the first spacing ring, the second spacing ring, the shielding rings and the at least one ring sheet are arranged on the sleeve shaft at intervals; the plurality of shielding rings are sequentially arranged between the first spacing ring and the second spacing ring at intervals, the ring piece is positioned between two adjacent shielding rings, the sleeve is embedded in the mandrel and forms a ring lead cavity with the mandrel, the U-shaped plate is arranged on the inner wall of the outer cover in a mode that an opening faces the inner wall of the outer cover and forms a brush lead cavity with the inner wall of the outer cover, the brush holder plate is arranged on the outer side of the shielding rings, and brush wires on the brush holder plate are in contact with the ring piece;

a ring lead of the video slip ring penetrates through the sleeve shaft and the shaft sleeve, enters the ring lead cavity and is led out from the end face of the mandrel;

and a brush lead of the video slip ring is welded on the brush frame plate, passes through the brush lead cavity and is led out from the end face of the bracket.

Further, the ring piece is located at the middle position of two adjacent shielding rings, and the outer diameter of each shielding ring is larger than that of the ring piece.

Further, a first set gap is formed between the outer diameter of the shielding ring and the sleeve shaft and the bracket to form a first metal cavity.

Further, a second set gap is formed among the outer diameters of the first spacer ring and the second spacer ring and between the sleeve shaft and the support to form a second metal cavity.

Furthermore, the shielding ring with the ring piece is all seted up V type annular on its ring piece outer wall, and the video heart yearn of every group video ring connects the ring piece, the shielded wire of video ring connect respectively with two adjacent the shielding ring of ring piece, the brush silk with V type groove sliding contact, and then make the video line heart yearn with the shielded wire of video ring can both carry out rotation transmission through the sliding ring, and the shielding of video line is carried out ground connection after drawing forth through the sliding ring and is handled.

Further, the sleeve is disposed along an axial direction of the mandrel.

Furthermore, the support is cylindrical, a plurality of windows are formed in the axial direction of the support, one window is used for mounting the brush holder plate, and at least one window is used for cleaning the circular path.

Furthermore, the video slip ring further comprises spacing blocks, and the spacing blocks are arranged on windows, opposite to the windows, of each group of video rings, and are used for mounting the brush holder plate, so that each group of video rings are located in an independent cavity.

Furthermore, the first spacer ring, the second spacer ring and the sleeve shaft are all made of H62 brass.

Further, the number of the ring sheets is three.

(3) Advantageous effects

In summary, the present invention has the advantages that the ring occupied by the core wire of the video cable is installed between the left and right shielding rings, the shielding of the video cable is respectively connected to the two shielding rings, the ring occupied by the video cable is positioned on the sleeve shaft, and simultaneously, the ring lead and the brush lead of the conductive slip ring are respectively isolated during the implementation process, so that the technical problems of crosstalk and poor image definition caused by poor isolation of the video ring are solved. The video slip ring is simple in principle, high in applicability and convenient to apply, and can be applied to rotary transmission of high-definition video signals.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a video slip ring according to an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is a cross-sectional view of a video slip ring according to an embodiment of the present invention.

In the figure:

1-a housing; 2-a scaffold; 301-a first spacer ring; 302-a second spacer ring; 4-a shield ring; 5-ring piece; 6-shaft sleeve; 7-a mandrel; 8-sleeve shaft; 9-a sleeve; 10-a brush holder plate; 11-U-shaped plates; 12-ring lead cavity; 13-brushing the lead cavity; 14-spacer blocks; 15-brush filaments.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 is a schematic structural diagram of a video slip ring according to an embodiment of the present invention, as shown in fig. 1 to 3, including a housing 1, and a bracket 2, a first spacer ring 301, a second spacer ring 302, a shielding ring 4, a ring sheet 5, a shaft sleeve 6, a core shaft 7, a sleeve shaft 8, a sleeve 9, a brush holder plate 10, and a U-shaped plate 11 disposed inside the housing; the support 2 is fixed in the outer cover 1, the mandrel 6 is cylindrical and is arranged on the support 2 in a coaxial mode with the outer cover 1, the shaft sleeve 6 is arranged on the mandrel 7, the sleeve shaft 8 is arranged on the shaft sleeve 6, and the first spacing ring 301, the second spacing ring 302, the shielding rings 4 and the ring sheets 5 are arranged on the sleeve shaft 8 at intervals; the shielding rings 4 are sequentially arranged between a first spacing ring 301 and a second spacing ring 302 at intervals, the ring piece 5 is positioned between two adjacent shielding rings 4, the sleeve 9 is embedded in the mandrel 7 and forms a ring lead cavity 12 with the mandrel, the U-shaped plate 11 is arranged on the inner wall of the outer cover 1 in a mode that the opening faces the inner wall of the outer cover 1 and forms a brush lead cavity 13 with the inner wall, the brush holder plate 10 is arranged on the outer side of the shielding rings 4, and the brush filaments 15 on the brush holder plate 10 are respectively contacted with the shielding rings 4 and the ring piece 5; a loop lead of the video slip ring penetrates through the sleeve shaft 8 and the shaft sleeve 6, enters the loop lead cavity 12 and is led out from the end face of the mandrel 7; the brush lead wire of the video slip ring is welded on the brush frame plate 10, passes through the brush lead wire cavity 13 and is led out from the end face of the bracket 2.

In the above embodiment, when the conductive slip ring is used for transmitting video signals, the isolation between adjacent rings of the conductive slip ring is improved, and the interference between video rings or the interference between the video rings and other power rings is reduced. In the implementation process, as shown in fig. 1, each group of video rings includes a ring piece 5 and two adjacent shielding rings 4, the ring piece 5 occupied by the video line core wires of the group of video rings is installed between the left and right shielding rings 4, the shielding wires of the video lines are respectively connected to the two shielding rings 4, and the ring piece 5 occupied by the video line core wires is located on the sleeve shaft 8, and meanwhile, in the implementation process, the ring lead and the brush lead of the conductive slip ring are also respectively isolated, so as to achieve the purpose of improving the isolation degree of the video slip ring.

The ring lead cavity 12 and the brush lead cavity 13 physically separate the video line from other power or signal lines, so that the isolation of the video slip ring is improved.

In some alternative embodiments, the ring plate 5 is located at the middle position of two adjacent shielding rings 4, and the outer diameter of the shielding ring 4 is larger than that of the ring plate 5. Specifically, as shown in fig. 1, the outer diameter of the shielding ring 4 on the left and right (in the direction shown in the figure) sides is much larger than the outer diameter of the ring piece 5, and a small gap is reserved between the outer diameter of the shielding ring 4, the sleeve shaft 8 and the bracket 2, so that the core of the video cable is positioned in a U-shaped metal cavity, thereby improving the isolation of the video rings and reducing crosstalk between the video rings.

In some alternative embodiments, the outer diameter of the shield ring 4, the sleeve shaft 8 and the bracket 2 have a first set clearance therebetween to form a first metal cavity.

In some alternative embodiments, the outer diameters of the first and

second spacers

301 and 302 and the sleeve shaft 8 and the bracket 2 have a second set gap therebetween to form a second metal cavity. Specifically, a small gap is reserved between the outer diameter of the first spacer ring 301 and the outer diameter of the second spacer ring 302 and the support 2 to form a U-shaped metal cavity, the shaft sleeve 6 realizes the insulation and isolation of the U-shaped metal cavity and the mandrel 7, the sleeve shaft 8 realizes the short connection of the shielding wires of a plurality of groups of video wires, the shielding of the video wires is led out through a slip ring and then is grounded, and therefore the isolation degree of the video rings from other power rings or signal rings is improved, and the interference of the video rings with other power rings or signal rings is reduced.

In some alternative embodiments, the shielding ring 4 and the ring piece 5 are both provided with V-shaped ring grooves (not shown) on the outer wall of the ring piece. Specifically, the brush wires 15 on the brush holder plate 10 can be in sliding contact in the V-shaped grooves, so that the video core wires and the shielding wires can be in rotating transmission through the slip rings, and the shielding of the video wires is led out through the slip rings and then is subjected to grounding treatment, so that the signal interference of the video rings can be reduced.

In some alternative embodiments, the sleeve 9 is arranged in the axial direction of the mandrel 7. This arrangement of the sleeve 9 facilitates the installation of the loop lead.

In some alternative embodiments, the frame 2 is cylindrical and has a plurality of windows 201 along its axial direction, wherein one window 201 is used for mounting the brush holder plate 10, and at least one window 201 is used for cleaning the loop.

In the above-described embodiment, the shape of the holder 2 is adapted to the housing 1, which is advantageous for the mounting connection with the housing 1. In order to make the core of the ring 5 in the metal cavity as much as possible, the bracket 2 only has the window 201 for holding the brush holder plate 10 and the window 201 for cleaning the ring, and the rest of the bracket 2 has its integrity, in a specific embodiment, the number of the ring 5 is 3, the 1 st ring and the 3 rd ring only have the window 201 at the position of the brush holder plate 10, and the spacer 14 is installed at the window 201 opposite to the 1 st ring, and the 2 nd ring is also provided with the spacer 14 on the bracket 2 opposite to the brush holder plate 10, so as to form a complete cavity as much as possible, and achieve the effect of improving the isolation of the video ring.

In some alternative embodiments, the first spacer ring 301, the second spacer ring 302 and the sleeve shaft 8 are all made of H62 brass.

In some alternative embodiments, the video slip ring further comprises spacers 14, the spacers 14 being provided on the opposite window of each set of video rings to the window 201 for mounting the brush holder plate 10, such that each set of video rings is in a separate cavity.

As shown in fig. 1-2, in a specific embodiment, the spacer 14 is disposed opposite to the brush holder plate 10, and when the video slip ring has three sets of video rings, in the first set of video rings, the spacer 14 is disposed at the lower end of the set of video rings and the brush holder plate 10 is disposed at the upper end thereof according to the order from left to right; in the second group of video rings, the spacer block 14 is arranged at the upper end of the second group of video rings, and the brush holder plate 10 is arranged at the lower end of the second group of video rings; in the third set of video rings, the spacer 14 is provided at its lower end and the brush holder plate 10 is provided at its upper end. By analogy, the spacing blocks 14 and the brush holder plate 10 are distributed in an up-and-down corresponding manner.

It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A video slip ring is characterized by comprising an outer cover (1), a support (2) arranged in the outer cover, a first spacer ring (301), a second spacer ring (302), a shielding ring (4), a ring sheet (5), a shaft sleeve (6), a mandrel (7), a sleeve shaft (8), a sleeve (9), a brush holder plate (10) and a U-shaped plate (11);

the support (2) is fixed in the outer cover (1), the mandrel (6) is cylindrical and is arranged on the support (2) in a coaxial mode with the outer cover (1), the shaft sleeve (6) is arranged on the mandrel (7), the sleeve shaft (8) is arranged on the shaft sleeve (6), and the first spacing ring (301), the second spacing ring (302), the shielding rings (4) and the at least one ring piece (5) are arranged on the sleeve shaft (8) at intervals; the shielding rings (4) are sequentially arranged between the first spacing ring (301) and the second spacing ring (302) at intervals, the ring piece (5) is positioned between two adjacent shielding rings (4), the sleeve (9) is embedded in the mandrel (7) and forms a ring lead cavity (12) with the mandrel, the U-shaped plate (11) is arranged on the inner wall of the outer cover (1) in a mode that an opening faces the inner wall of the outer cover (1) and forms a brush lead cavity (13) with the outer cover, the brush holder plate (10) is arranged on the outer side of the shielding rings (4), and brush wires (15) on the brush holder plate (10) are respectively contacted with the shielding rings (4) and the ring piece (5);

a loop lead of the video slip ring penetrates through the sleeve shaft (8) and the shaft sleeve (6), enters the loop lead cavity (12) and is led out from the end face of the mandrel (7);

and a brush lead of the video slip ring is welded on the brush frame plate (10), passes through the brush lead cavity (13) and is led out from the end face of the bracket (2).

2. Video slipring according to claim 1, characterized in that the ring segments (5) are located at the middle position of two adjacent shielding rings (4), the outer diameter of the shielding rings (4) being larger than the outer diameter of the ring segments (5).

3. Video slipring according to claim 1, characterized in, that the outer diameter of the shielding ring (4), the sleeve shaft (8) and the holder (2) have a first set gap between them to form a first metal cavity.

4. Video slipring according to claim 1, characterized in, that the outer diameter of the first spacer ring (301), the second spacer ring (302), the sleeve shaft (8) and the holder (2) have a second set gap between them to form a second metal cavity.

5. The video slip ring according to claim 1, wherein the outer walls of the ring sheets of the shielding rings (4) and the ring sheets (5) are provided with V-shaped ring grooves, the video core wire of each group of video rings is connected with the ring sheets (5), the shielding wires of the video rings are respectively connected with the two shielding rings (4) adjacent to the ring sheets (5), the brush wires (15) are in sliding contact with the V-shaped grooves, so that the video core wire and the shielding wires of the video rings can be rotationally transmitted through the slip ring, and the shielding of the video wires is grounded after being led out through the slip ring.

6. Video slipring according to claim 1, characterized in, that the sleeve (9) is arranged in the axial direction of the spindle (7).

7. Video slipring according to claim 1, characterized in that said frame (2) is cylindrical and is provided with a plurality of windows (201) along its axial direction, one of said windows (201) being adapted to receive said brush holder plate (10) and at least one of said windows (201) being adapted to clean the circuit.

8. Video slipring according to claim 7, characterized in that it further comprises spacers (14), said spacers (14) being provided at the opposite window of each set of video rings to the window (201) for mounting the brush holder plate (10), such that each set of video rings is in a separate cavity.

9. Video slipring according to claim 1, characterized in, that the first distance ring (301), the second distance ring (302) and the sleeve shaft (8) are all H62 brass.

10. Video slipring according to claim 1, characterized in, that the number of the ring segments (5) is three.