CN219554077U

CN219554077U - Fixing device of quick-plug type radio frequency cable

Info

Publication number: CN219554077U
Application number: CN202321219413.XU
Authority: CN
Inventors: 景素芳; 杨评论; 史小斌; 李晨; 何红军; 樊海博; 杨怡
Original assignee: Xian Electronic Engineering Research Institute
Current assignee: Xian Electronic Engineering Research Institute
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-08-18
Anticipated expiration: 2033-05-19

Abstract

The utility model relates to a fixing device of a quick-plug radio frequency cable, belonging to the field of radar debugging; the fixing device comprises a fixing frame, a fixing screw, a cable position fine adjustment and a fixing knob; the main body of the fixing frame is plate-shaped, two ends of the fixing frame are provided with first threaded holes which are communicated, the middle of the fixing frame is provided with annular sleeves which are communicated, and the first threaded holes and the annular sleeves are respectively in one-to-one correspondence with and matched with second threaded holes and socket holes on the cable mounting surface; the fixing screw penetrates through the first threaded hole to fix the fixing frame on the cable installation surface; two groups of radial third threaded holes are uniformly distributed in the same circumferential plane of the annular sleeve, each group of third threaded holes is positioned on the same axis penetrating through the axle center of the annular sleeve, and 2 cable positions are arranged in a group of third threaded holes in a fine adjustment and fixed rotation opposite direction; the cable head passes the annular sleeve and inserts the socket hole, and through 2 cable position fine setting and fixed knob are used for adjusting the axiality of cable head and socket hole after the butt joint and are fixed to the cable head.

Description

Fixing device of quick-plug type radio frequency cable

Technical Field

The utility model belongs to the field of radar debugging, and particularly relates to a fixing device of a quick-plug type radio frequency cable.

Background

The integration level of certain airborne radar equipment is high, and is small, and the radar front end adopts fast-plug connector to be connected with the antenna, in order to ensure fast-plug connector's reliable connection, design has the structure that is used for strengthening the connection on radar front end and the antenna to guarantee that radar front end and antenna are stably connected. However, in the production debugging, performance testing and inspection stage, the antenna needs to be detached for many times and is switched into a testing state, namely, the front end of the radar is connected with the detection instrument through the fast-plug radio frequency cable for each test, the front end of the radar and the detection instrument need to be connected repeatedly for many times, and the working frequency is 18GHz, so that the reliability of the connection between the front end of the radar and the cable in the testing state needs to be ensured, and the good transmission performance of radio frequency signals in the testing working process is ensured.

The maximum diameter of the head of the quick connector used for connecting the front end of the airborne radar with the antenna is phi 3.3mm, the head of the quick connector is opposite to the socket hole 10 in the inserting picture 2, the opposite inserting depth is 2mm, the installation surface of the socket of the front end of the radar is inclined downwards by 25 degrees, when the radar is switched into a testing state, the head of the quick connector (namely the cable head) of the cable is inserted into the socket hole of the front end of the radar for connection, the total length of the cable head is 18.5mm, and the total length of the cable needed for connection is 2000mm, so that the following exists: because the head of the quick connector at the front end of the radar has small opposite insertion depth (only 2 mm), when the test state is changed to the test state for testing, the cable head for testing does not have any structure for fixing, and the cable head and the cable can incline under the action of dead weight or slight external force, so that the cable head and the socket bear bending moment; on one hand, the cable is in poor contact with a socket at the front end of the radar, the cable is easy to loosen, and signal transmission and measurement and adjustment are affected; on the other hand, the reeds of the butt joint parts of the cable head and the socket at the front end of the radar are easy to deform and damage after being stressed, and even if the cable is slightly touched and rocked, the phenomenon of loosening of the cable or damage of the reeds can be frequently generated.

In order to test and tune the radar normally, it is necessary to solve the problem of reliable connection between the rf cable for testing and the front end of the radar.

Disclosure of Invention

The technical problems to be solved are as follows:

in order to avoid the defects of the prior art, the utility model provides a fixing device for a quick-plug type radio frequency cable, which solves the problems of poor signal transmission, loose cable head and damage to the cable head and a socket reed caused by unstable connection between the front end of a radar and the cable in a test state of some airborne radar equipment.

The technical scheme of the utility model is as follows: a fixing device of a quick-plug radio frequency cable comprises a fixing frame 1, a fixing screw 2 and a cable position fine-tuning and fixing knob 3; the main body of the fixing frame 1 is plate-shaped, two ends of a plate-shaped main body 14 are provided with first threaded holes 11 which are communicated, a circular sleeve 12 which is communicated is arranged in the middle of the main body, and the first threaded holes 11 and the circular sleeve 12 are respectively in one-to-one correspondence with and matched with the second threaded holes 9 and the socket holes 10 on the cable mounting surface 8; the fixing screw 2 passes through the first threaded hole 11 to fix the fixing frame 1 on the cable installation surface 8;

a plurality of groups of third threaded holes 13 are uniformly distributed in the circumferential direction of the annular sleeve 12, each group of third threaded holes 13 is positioned on the same axis passing through the axle center of the annular sleeve 12, and the axes of the plurality of groups of third threaded holes 13 are coplanar and perpendicular to the axis of the annular sleeve 12; the cable position fine adjustment and fixation knob 3 is provided with a screw 31,2, and the cable position fine adjustment and fixation knob 3 is oppositely arranged on a group of third threaded holes 13 through the screw 31; the cable head 4 is inserted into the socket hole 10 through the annular sleeve 12, and the fine adjustment and fixing knob 3 for adjusting the coaxiality of the cable head 4 and the socket hole 10 after the cable head 4 is inserted into the socket hole 10 and fixing the cable head 4 by screwing 2 cable positions.

The utility model further adopts the technical scheme that: the plate-shaped main body 14 of the fixing frame 1 is in a surface shape consistent with the cable installation surface 8 of the radar front end 6.

The utility model further adopts the technical scheme that: the annular sleeve 12 has two sets of third threaded holes 13, 4 third threaded holes 13 in total, the axis of one set of third threaded holes 13 is parallel to the connecting line of the two first threaded holes 11 projected on the plate-shaped main body 14, and the axis of the other set of third threaded holes 13 is perpendicular to the connecting line.

The utility model further adopts the technical scheme that: the third screw holes 13 of the two groups are arranged on the annular sleeve 12 at a height higher than the position of the boss 41 of the cable head 4 after the cable head is in place.

The utility model further adopts the technical scheme that: the rear end of the screw rod 31 of the cable position fine adjustment and fixing knob 3 is provided with a knob part, and the axial outer surface of the knob part is carved with an anti-skid groove.

The utility model further adopts the technical scheme that: the rear end of the fixing screw 2 is provided with a knob part, and the axial outer surface of the knob part is carved with an anti-skid groove.

The utility model further adopts the technical scheme that: the upper and lower surfaces of the two ends of the plate-shaped main body 14 of the fixing frame are respectively provided with a cylindrical boss with the same outer diameter, the first threaded hole 11 is coaxial with the cylindrical bosses on the upper and lower surfaces, the lower end of the first threaded hole 11 is a section of coaxially arranged unthreaded hole, and the shaft diameter of the unthreaded hole is larger than the first threaded hole 11 and smaller than the outer diameter of the cylindrical boss.

The utility model further adopts the technical scheme that: the outer diameter of the knob part of the fixing screw 2 is larger than the outer diameter of the cylindrical boss.

The utility model further adopts the technical scheme that: the annular sleeve 12 has an annular boss protruding from the lower end surface of the plate-shaped body 14, and the annular boss has the same height as the cylindrical bosses at both ends of the lower surface of the plate-shaped body 14.

Advantageous effects

The utility model has the beneficial effects that: the utility model relates to a fixing device of a quick-plug radio-frequency cable, which comprises a fixing frame, fixing screws and cable position fine adjustment and fixing knobs, wherein the plate-shaped main body of the fixing frame is consistent with the surface type of a cable installation surface at the front end of a radar, the fixing frame is provided with first threaded holes and annular sleeves which are in one-to-one correspondence with second threaded holes and socket holes on the cable installation surface at the front end of the radar, and the fixing frame is installed on the cable installation surface at the front end of the radar through the fixing screws; the cable head penetrates through the annular sleeve and is inserted into the socket hole of the cable mounting surface, and the cable head is subjected to coaxial fine adjustment and fixation through the 2 cable position fine adjustment and fixation knobs which are oppositely arranged in the third threaded hole of the annular sleeve.

The cable position fine adjustment and fixing knob can adjust the cable head to the position coaxial with the socket, so that the cable head and the socket are well contacted, and the cable head cannot be separated even if the cable head is slightly loosened because the cable position fine adjustment and fixing knob clamps the cable head above the boss of the cable head.

The utility model solves the problems of cable loosening and cable head and socket reed damage frequently occurring due to small insertion depth when the front end of a certain radar is directly inserted with the cable head of a quick-plug radio-frequency cable for testing; the utility model does not change the structures of the front end of the radar and the cable head, and has simple structure and good operability; the fixing device of the quick-plug radio-frequency cable ensures that the cable head and the socket are reliably contacted after being inserted, has good signal transmission, can not be easily loosened, can not be loosened even under normal traction under normal touch and shake, and can not be damaged.

Drawings

FIG. 1 is a block diagram of the whole fixing device of the quick-plug radio frequency cable of the utility model;

FIG. 2 is a schematic view of a cable mounting face of a radar front end;

FIG. 3 is a schematic view showing the downward inclination angle of the cable mounting surface at the front end of the radar;

FIG. 4 is a block diagram of a cable head;

FIG. 5 is a schematic diagram showing the shaking of the cable head in the testing process after the cable head is plugged into the front-end socket of the radar without using the fixing device of the present utility model;

FIG. 6 is an exploded view of the structure of the fixing device of the quick-plug type radio frequency cable of the utility model;

FIG. 7 is a sectional view showing the use state of the fixing device of the quick-plug type radio frequency cable of the present utility model;

fig. 8 is a structural diagram of a fixing frame of the present utility model.

Reference numerals illustrate: 1. mount 2, set screw 3, cable retention and trim knob 31, screw 4, cable head 41, boss 5, cable 6, radar front end 7, vibration isolator 8, cable mounting face 9, second threaded bore 10, socket bore 11, first threaded bore 12, annular sleeve 13, third threaded bore 14, plate body 15, cable post-shake position 16, cable head and socket mating position.

Detailed Description

The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 2-5, fig. 2 shows a radar front end 6 of an airborne radar device, two sides are provided with cable mounting surfaces 8, two second threaded holes 9 at two ends are M3 threaded holes for fixing an antenna, the cable mounting surface 8 of the radar front end is inclined downwards by 25 ° from fig. 3, fig. 4 shows a structure of a radio frequency cable head 4, and when the airborne radar device is switched to a test state, the cable head 4 is mounted in a socket hole 10 of the cable mounting surface 8 of the radar front end, so that the shaking condition shown in fig. 5 often occurs, and the problems of poor signal transmission, loosening of the cable head 4 and damage of the cable head 4 and a socket reed are caused.

Referring to fig. 1, 6, 7 and 8, the fixing device for a quick-plug radio frequency cable of the present utility model includes a fixing frame 1, a fixing screw 2, and a cable position fine-tuning and fixing knob 3.

The fixing frame 1 is made of an aluminum plate 2A12, the main body of the fixing frame 1 is plate-shaped, cylindrical bosses with the same outer diameter and 9mm height are arranged at two ends of the plate-shaped main body 14, the cylindrical bosses penetrate through the plate-shaped main body 14, cylindrical bosses are formed on the upper surface and the lower surface of the plate-shaped main body 14, the bosses on the upper surface are higher than the bosses on the lower surface, and the protruding height of the bosses on the lower surface is 1mm; the centers of the cylindrical bosses at the two ends of the plate-shaped main body 14 are coaxially provided with a first through threaded hole 11 with the same specification M3 as the second threaded hole 9; the lower end of the first threaded hole 11 is a section of light hole coaxial with the first threaded hole 11, and the shaft diameter of the light hole is larger than the first threaded hole 11 and smaller than the outer diameter of the cylindrical boss. An annular sleeve 12 with the total height of 16mm is vertically arranged in the middle of the plate-shaped main body 14, the annular sleeve 12 penetrates through the plate-shaped main body 14, and an annular boss with the height of 1mm is formed on the lower surface of the plate-shaped main body 14; the diameter of the central hole of the annular sleeve 12 is phi 4.5mm, which is 0.2mm larger than the maximum outer diameter of the cable head 4.

The first threaded holes 11 and the annular sleeve 12 are respectively in one-to-one correspondence with and matched with the second threaded holes 9 and the socket holes 10 on the cable mounting surface 8; the 2 fixing screws 2 penetrate through the first threaded holes 11 of the fixing frame 1 to be connected with the corresponding second threaded holes 9 on the cable mounting surface 8, the fixing frame 1 is fixed on the cable mounting surface 8, and the central hole of the annular sleeve 12 is coaxial with the socket hole 10; referring to fig. 8, since the distances between the socket holes 10 and the second threaded holes 9 on both sides are not equal, namely 33.2mm and 34.8mm, the outline of the plate-shaped main body 14 of the fixing frame 1 is designed to be consistent with the outline of the cable mounting surface 8 on the front end of the radar, so that the left and right sides can be prevented from being misplaced by the outline shape pair when the fixing frame 1 is mounted, and the cable head 4 and the socket are prevented from being damaged due to the fact that the cable head 4 is not aligned with the socket.

Referring to fig. 6 and 8, two groups of 4 third threaded holes 13 with a size of M2 are uniformly distributed in the circumferential direction of the annular sleeve 12 at a height of 11.3mm, the axes of the two groups of third threaded holes 13 all pass through the axis of the annular sleeve 12 and cross in the same plane perpendicular to the annular sleeve 12, wherein the axes of one group of two third threaded holes 13 are parallel to the connecting lines of the two first threaded holes 11 projected on the plate-shaped main body 14, and the axes of the other group of two third threaded holes 13 are perpendicular to the connecting lines of the two first threaded holes 11 projected on the plate-shaped main body 14; the cable position fine adjustment and fixation knob 3 is provided with a screw 31,2 cable position fine adjustment and fixation knob 3 which is oppositely arranged on a group of third threaded holes 13 through the screw 31; referring to fig. 7, the cable head 4 is inserted into the socket hole 10 through the annular sleeve 12, and the fine adjustment and fixing knob 3 for adjusting the coaxiality of the cable head 4 and the socket hole 10 after opposite insertion is used for fixing the cable head 4 by screwing 2 cable positions, at this time, the position of the cable head 4 clamped by the fine adjustment and fixing knob 3 is located at the position 0.5mm above the boss 41 of the cable head. The fixing screw 2 and the cable position fine adjustment and fixing knob 3 are processed by aluminum bars 2A 12.

Referring to fig. 6 and 7, the rear end of the screw rod 31 of the cable position fine adjustment and fixing knob 3 is provided with a knob portion, the rear end of the fixing screw 2 is provided with a knob portion, and for skid prevention, the axial outer surfaces of the cable position fine adjustment and fixing knob 3 and the knob portion of the fixing screw 2 are engraved with skid prevention grooves with a depth of 0.5mm to increase friction, so that manual operation is facilitated. In order to facilitate the knob, the outer diameter of the knob part at the rear end of the fixing screw 2 is slightly larger than the outer diameter of the cylindrical bosses at the two ends of the fixing frame 1. The fixing screw 2 is designed into a loose screw-proof form, the diameter of a knob part is phi 8mm, and the fixing screw is larger than a knob part of a standard same-specification loose screw-proof screw, so that the fixing screw is convenient to assemble and disassemble manually, and parts are not easy to lose.

Referring to fig. 7, in order to reduce the contact surface between the fixing frame 1 and the cable installation surface 8 at the front end of the radar, the cylindrical bosses at two ends of the fixing frame 1 and the middle annular sleeve 12 are protruded by 1mm from the lower surface of the plate-shaped main body 14, and the 3 protruded surfaces are ensured to fall in the vibration isolation pad 7 on the cable installation surface 8, so that the friction damage of the fixing device on the installation surface at the front end of the radar is avoided.

The use process of the fixing device of the quick-plug radio frequency cable provided by the utility model is as follows:

when the radar front end 6 of a certain airborne radar device needs to be connected with the cable head 4 of the quick-plug radio-frequency cable for testing, the cable head 4 is fixed by using the fixing device. When in use, the cable installation surface 8 with the same outline shape and the fixing frame 1 are firstly selected for installation, so that the left side and the right side are prevented from being installed wrongly; then, 2 fixing screws 2 are arranged in place, and the fixing frame 1 is fixedly connected with the front end 6 of the radar; then the cable head 4 is inserted into the annular sleeve 12 and extends to the socket hole 10, so that the cable head and a socket of the radar front end 6 are inserted in place; 2 cable fixing and fine tuning knobs 3 are oppositely screwed into a group of third threaded holes 13, the cable fixing and fine tuning knobs 3 are screwed, the axial direction of the cable heads 4 is adjusted to be coaxial with the socket holes 10, and the cable heads 4 are clamped above the cable head bosses 41; depending on the direction of radar front end installation, the cable fixing and trimming knob 3 may be mounted in a suitable set of third threaded holes 13, either transverse or longitudinal. Thus, the installation is completed.

After the fixing device of the quick-plug type radio-frequency cable is used, the quick-plug type radio-frequency cable for testing is reliably fixed in the use process, the cable head 4 and the reed of the socket are not affected by bending moment, and deformation and damage of the reed are avoided. And the radio frequency signal transmission is good, so that the smooth proceeding of debugging and verification is ensured.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims

1. The utility model provides a fixing device of quick-plug type radio frequency cable which characterized in that: comprises a fixing frame (1), a fixing screw (2) and a cable position fine adjustment and fixing knob (3); the main body of the fixing frame (1) is plate-shaped, two ends of the plate-shaped main body (14) are provided with first threaded holes (11) which are communicated, a circular sleeve (12) which is communicated is arranged in the middle of the main body, and the first threaded holes (11) and the circular sleeve (12) are respectively in one-to-one correspondence with and matched with the second threaded holes (9) and the socket holes (10) on the cable mounting surface (8); the fixing screw (2) penetrates through the first threaded hole (11) to fix the fixing frame (1) on the cable mounting surface (8);

a plurality of groups of third threaded holes (13) are uniformly distributed in the circumferential direction of the annular sleeve (12), each group of third threaded holes (13) is positioned on the same axis passing through the axle center of the annular sleeve (12), and the axes of the plurality of groups of third threaded holes (13) are coplanar and perpendicular to the axis of the annular sleeve (12); the cable position fine adjustment and fixation knob (3) is provided with screws (31), and 2 cable position fine adjustment and fixation knobs (3) are oppositely arranged on a group of third threaded holes (13) through the screws (31); the cable head (4) is inserted into the socket hole (10) through the annular sleeve (12), and the fine adjustment and fixing knob (3) for adjusting the coaxiality of the cable head (4) and the socket hole (10) after opposite insertion is used for fixing the cable head (4) by screwing 2 cable positions.

2. The quick connect radio frequency cable fixing device of claim 1, wherein: the plate-shaped main body (14) of the fixing frame (1) is consistent with the surface shape of the cable installation surface (8) of the front end (6) of the radar.

3. The quick connect radio frequency cable fixing device of claim 1, wherein: the plurality of groups of third threaded holes (13) of the annular sleeve (12) are specifically 2 groups of 4 third threaded holes (13), the axis of one group of third threaded holes (13) is parallel to the connecting line of the projection of the axes of the two first threaded holes (11) on the plate-shaped main body (14), and the axis of the other group of third threaded holes (13) is perpendicular to the connecting line.

4. A quick connect radio frequency cable fixing device as claimed in claim 3, wherein: the arrangement height of the two groups of third threaded holes (13) is higher than the height of the boss (41) of the cable head (4) after the cable head is installed in place.

5. The quick connect radio frequency cable fixing device of claim 1, wherein: the cable position fine adjustment and fixing knob (3) is characterized in that a knob part is arranged at the rear end of a screw rod (31) and an anti-skid groove is carved on the axial outer surface of the knob part.

6. The quick connect radio frequency cable fixing device of claim 1, wherein: the rear end of the fixing screw (2) is provided with a knob part, and the axial outer surface of the knob part is carved with an anti-skid groove.

7. The quick connect radio frequency cable fixing device of claim 6, wherein: the upper surface and the lower surface at two ends of the plate-shaped main body (14) of the fixing frame are respectively provided with a cylindrical boss with the same outer diameter, the first threaded hole (11) is coaxial with the cylindrical bosses on the upper surface and the lower surface, the lower end of the first threaded hole (11) is a section of coaxially arranged unthreaded hole, and the shaft diameter of the unthreaded hole is larger than that of the first threaded hole (11) and smaller than the outer diameter of the cylindrical boss.

8. The quick connect radio frequency cable fixing device of claim 7, wherein: the outer diameter of the knob part of the fixing screw (2) is larger than that of the cylindrical boss.

9. The quick connect radio frequency cable fixing device of claim 7, wherein: the annular boss protrudes from the lower end surface of the plate-shaped main body (14), and the height of the annular boss is the same as that of the cylindrical bosses at the two ends of the lower surface of the plate-shaped main body (14).