Cable shielding performance testing device

Abstract

The utility model relates to the technical field of cable testing, and discloses a cable shielding performance testing device which comprises a testboard and further comprises a moving mechanism which is arranged at the top of the testboard and used for adjusting the distance between installation supports, the moving mechanism comprises a motor, the output end of the motor is fixedly connected with a two-way screw, and the output end of the two-way screw is fixedly connected with a nut. The outer side of the two-way screw is in threaded connection with a support body, the inner wall of the support body is in sliding connection with a sliding rod, the outer sides of the sliding rod and the support body are fixedly connected with limiting plates, and the two ends of the two-way screw are rotationally connected with a first supporting plate and a second supporting plate correspondingly; one side of the first supporting plate is fixedly connected with one side of the motor, and the problems that when two mounting supports of an existing cable shielding performance testing device are adjusted, screws need to be unceasingly loosened and tightened, so that the mounting supports are fixed, time and labor are wasted, the adjusting efficiency is low, and the testing work efficiency is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable testing, in particular to a cable shielding performance testing device. Background Art

[0002] The network analyzer generates a set of sweep frequency signals, which are coupled to a straight wire (sweep frequency signal transmitter). This straight wire is parallel to and close to the shielded cable under test, and the sweep frequency signal is emitted from it; the shielding layer of the cable under test "tries" to completely absorb the sweep frequency signal and completely guide it into the ground (this is the so-called "shielding"); the "residual" part of the sweep frequency signal that is not shielded passes through the shielding layer and reaches the conductive layer of the cable under test. The conductive layer "feeds back" the signal to the network analyzer, and the network analyzer performs spectrum analysis on the signal. This spectrum value reflects the shielding effectiveness of the shielding layer (the ideal state is full shielding, and the conductive layer has no electrical signal). The network analyzer is a universal complete machine, but the length and specifications of the cable under test vary. Whether its length is appropriate, whether its connection with the network analyzer is reliable, whether the shielding measures taken for it are reliable, and whether its routing is simple directly affect the test results.

[0003] Patent application number CN202021792149.5 is a cable shielding performance test auxiliary device. Compared with the prior art, the utility model uses two mounting brackets to fix the two ends of the tested cable, one end of which is connected to the network tester. By adjusting the positions of the two mounting brackets, the tested cable is straightened to prevent the wire from generating inductance. However, when adjusting the two mounting brackets, the device needs to constantly loosen and tighten the screws to fix the mounting brackets, which is time-consuming and labor-intensive, and the adjustment efficiency is low, resulting in reduced test efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a cable shielding performance testing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cable shielding performance testing device, comprising a test bench, and also comprising a movable mechanism arranged on the top of the test bench for adjusting the distance between mounting brackets, the movable mechanism comprising a motor, the output end of the motor is fixedly connected with a bidirectional screw, the outer side of the bidirectional screw is threadedly connected with a bracket body, the inner wall of the bracket body is slidably connected with a sliding rod, and the sliding rod and the outer side of the bracket body are fixedly connected with a limiting plate.

[0006] Preferably, two ends of the bidirectional screw are rotatably connected to a first support plate and a second support plate respectively, and one side of the first support plate is fixedly connected to one side of the motor.

[0007] Preferably, one side of the first support plate is fixedly connected to one end of a slide bar, the other end of the slide bar is fixed to one side of the second support plate, and both the first support plate and the second support plate are fixed to the top of the test bench.

[0008] Preferably, a slide groove is provided on the top of the test bench, a slider is fixedly connected to the bottom of the bracket body, and the outer side of the slider is slidably connected to the inner wall of the slide groove.

[0009] Preferably, a mounting plate is fixedly connected to one side of the bracket body, and a connector is fixed to one side of the mounting plate.

[0010] Preferably, a through hole is formed on the inner wall of the bracket body, and a cable to be tested is arranged inside the through hole.

[0011] Preferably, an upper clamping plate and a lower clamping plate are respectively provided on the outer side of the tested cable, and a first moving block and a second moving block are fixed on the outer side of the upper clamping plate and the lower clamping plate, and the first moving block and the second moving block are both slidably connected to the inner wall of the bracket body.

[0012] Preferably, a bidirectional stud is threadedly connected to the inner wall of the first moving block, the bidirectional stud is rotatably connected to the inner wall of the bracket body, and a turntable is fixedly connected to the top end of the bidirectional stud.

[0013] Preferably, the inner wall of the second moving block is slidably connected with a sliding column, and both ends of the sliding column are fixed to the inner wall of the bracket body.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model discloses to automatically control the movement of the installation bracket by arranging a moving mechanism, thus saving the time of workers in assembling screws, improving the working efficiency of cable testing, and solving the problem that in the existing cable shielding performance testing device, when adjusting the two installation brackets, the screws need to be constantly loosened and tightened to fix the installation brackets, which is time-consuming and labor-intensive, and the adjustment efficiency is low, resulting in reduced testing work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of a cable shielding performance testing device provided by the utility model;

[0017] Figure 2 A schematic diagram of the structure of the mobile mechanism provided by the utility model;

[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4A schematic diagram of the structure of the bracket body provided by the utility model;

[0020] Figure 5 This is a schematic diagram of the structure inside the bracket body provided by the utility model.

[0021] In the figure: 1. test bench; 2. moving mechanism; 21. motor; 22. bidirectional screw; 23. bracket body; 24. slide bar; 25. limit plate; 3. first support plate; 4. second support plate; 5. slide groove; 6. slide block; 7. mounting plate; 8. connector; 9. through hole; 10. tested cable; 11. upper clamping plate; 12. lower clamping plate; 13. first moving block; 14. second moving block; 15. bidirectional stud; 16. turntable; 17. slide column. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 As shown, a cable shielding performance testing device includes a test bench 1, and also includes a moving mechanism 2 arranged on the top of the test bench 1 for adjusting the distance between the mounting brackets, the moving mechanism 2 includes a motor 21, the output end of the motor 21 is fixedly connected with a bidirectional screw 22, the outer side of the bidirectional screw 22 is threadedly connected with a bracket body 23, the inner wall of the bracket body 23 is slidably connected with a slide bar 24, and the outer side of the slide bar 24 and the bracket body 23 are both fixedly connected with a limiting plate 25; the cable shielding performance can be tested by setting the test bench 1, the bidirectional screw 22 can be driven to rotate by setting the motor 21, the bracket body 23 can be driven to move by setting the bidirectional screw 22, the connector 8 can be installed by setting the bracket body 23 to fix the cable 10 to be tested, the stability of the movement of the bracket body 23 can be improved by setting the slide bar 24, and the moving position of the bracket body 23 can be limited by setting the limiting plate 25.

[0024] See also Figure 2-5As shown, the two ends of the bidirectional screw 22 are rotatably connected to the first support plate 3 and the second support plate 4 respectively, one side of the first support plate 3 is fixedly connected to one side of the motor 21; one side of the first support plate 3 is fixedly connected to one end of the slide bar 24, and the other end of the slide bar 24 is fixed to one side of the second support plate 4, and the first support plate 3 and the second support plate 4 are both fixed to the top of the test bench 1; a slide groove 5 is provided on the top of the test bench 1, and a slider 6 is fixedly connected to the bottom of the bracket body 23, and the outer side of the slider 6 is slidably connected to the inner wall of the slide groove 5; one side of the bracket body 23 is fixed The bracket body 23 is fixedly connected with a mounting plate 7, and a connector 8 is fixed on one side of the mounting plate 7; a through hole 9 is opened on the inner wall of the bracket body 23, and a cable 10 to be tested is arranged inside the through hole 9; an upper clamping plate 11 and a lower clamping plate 12 are respectively arranged on the outer side of the cable 10 to be tested, and a first moving block 13 and a second moving block 14 are fixed on the outer side of the upper clamping plate 11 and the lower clamping plate 12, and the first moving block 13 and the second moving block 14 are both slidably connected to the inner wall of the bracket body 23; the inner wall of the first moving block 13 is threadedly connected with a bidirectional stud 15, and the bidirectional stud 15 is rotatably connected to the bracket body The top of the bidirectional stud 15 is fixedly connected with a turntable 16 on the inner wall of the bracket body 23; the inner wall of the second moving block 14 is slidably connected with a slide column 17, and both ends of the slide column 17 are fixed to the inner wall of the bracket body 23; the bidirectional screw 22 and the slide bar 24 can be supported by arranging the first support plate 3 and the second support plate 4, and the stability of the movement of the bracket body 23 can be improved by arranging the slide groove 5 and the slider 6, and the connector 8 can be installed by arranging the mounting plate 7, and the connector 8 includes a shielding cover. The cable 10 under test is connected to the network analyzer through the connector 8, and the through hole 9 can facilitate the cable under test 10 passes through the bracket body 23, and the tested cable 10 can be clamped and fixed by arranging the upper clamping plate 11 and the lower clamping plate 12. The bidirectional stud 15 and the sliding column 17 can be installed by arranging the first moving block 13 and the second moving block 14. The bidirectional stud 15 can be rotated to drive the first moving block 13 to move, thereby driving the upper clamping plate 11 and the lower clamping plate 12 to move, so as to clamp and fix the tested cable 10. The sliding column 17 can improve the stability of the movement of the upper clamping plate 11 and the lower clamping plate 12, and the turntable 16 can be used to drive the bidirectional stud 15 to rotate.

[0025] Working principle: the worker passes the tested cable 10 through the bracket body 23 and connects it to the network analyzer through the connector 8, rotates the turntable 16 to drive the bidirectional stud 15 to rotate, and the rotation of the bidirectional stud 15 drives the upper clamping plate 11 and the lower clamping plate 12 to move, so as to clamp and fix the tested cable 10, turns on the motor 21 to drive the bidirectional screw 22 to rotate, and the bidirectional screw 22 drives the bracket body 23 to move, and the movement of the bracket body 23 makes the tested cable 10 straightened, so as to facilitate the shielding performance test. The test bench 1 and the shielding cover are both made of metal copper material.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable shielding performance testing device, comprising a test bench (1), characterized in that: Also includes: A moving mechanism (2) is arranged on the top of the test bench (1) for adjusting the distance between the mounting brackets, the moving mechanism (2) comprising a motor (21), the output end of the motor (21) being fixedly connected to a bidirectional screw (22), the outer side of the bidirectional screw (22) being threadedly connected to a bracket body (23), the inner wall of the bracket body (23) being slidably connected to a sliding rod (24), and the outer sides of the sliding rod (24) and the bracket body (23) being fixedly connected to a limiting plate (25).

2. A cable shielding performance testing device according to claim 1, characterized in that: The two ends of the bidirectional screw (22) are rotatably connected to a first support plate (3) and a second support plate (4), respectively, and one side of the first support plate (3) is fixedly connected to one side of the motor (21).

3. A cable shielding performance testing device according to claim 2, characterized in that: One side of the first support plate (3) is fixedly connected to one end of a sliding rod (24), and the other end of the sliding rod (24) is fixed to one side of the second support plate (4). Both the first support plate (3) and the second support plate (4) are fixed to the top of the test bench (1).

4. A cable shielding performance testing device according to claim 1, characterized in that: The top of the test bench (1) is provided with a slide groove (5), the bottom of the support body (23) is fixedly connected with a slider (6), and the outer side of the slider (6) is slidably connected to the inner wall of the slide groove (5).

5. A cable shielding performance testing device according to claim 4, characterized in that: A mounting plate (7) is fixedly connected to one side of the bracket body (23), and a connector (8) is fixed to one side of the mounting plate (7).

6. A cable shielding performance testing device according to claim 5, characterized in that: A through hole (9) is provided on the inner wall of the bracket body (23), and a cable to be tested (10) is arranged inside the through hole (9).

7. A cable shielding performance testing device according to claim 6, characterized in that: An upper clamping plate (11) and a lower clamping plate (12) are respectively arranged on the outer side of the tested cable (10), and a first moving block (13) and a second moving block (14) are fixed on the outer side of each of the upper clamping plate (11) and the lower clamping plate (12), and each of the first moving block (13) and the second moving block (14) is slidably connected to the inner wall of the bracket body (23).

8. A cable shielding performance testing device according to claim 7, characterized in that: The inner wall of the first moving block (13) is threadedly connected with a bidirectional stud (15), the bidirectional stud (15) is rotatably connected to the inner wall of the bracket body (23), and the top end of the bidirectional stud (15) is fixedly connected with a rotating disk (16).

9. A cable shielding performance testing device according to claim 8, characterized in that: The inner wall of the second moving block (14) is slidably connected to a sliding column (17), and both ends of the sliding column (17) are fixed to the inner wall of the bracket body (23).

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