A cable shielding performance testing device

Abstract

The utility model discloses a cable shielding performance testing arrangement relates to cable testing technical field. A kind of cable shielding performance testing arrangement, including support, still include: two symmetrical settings sliding table, sliding installation in the both sides of the support, wherein, two the sliding table are all connected with device block, opening and closing part that the support is equipped with drives two sliding table mutually away or close, network analyzer is fixedly installed on the support;Two round holes are respectively arranged in two the device block, wherein, two the round hole are all connected with multiple circumferentially distributed inclined poles by clamping component, the clamping component is used to drive the end of inclined pole to the axis direction of round hole and draw together;The utility model can quickly complete the fixing work of cable end, operation is more convenient, and multiple inclined pole will make the end of cable stress more uniform, indirectly guaranteed the test efficiency of cable shielding performance.

Description

Technical Field

[0001] This utility model belongs to the field of cable testing technology, specifically, it relates to a cable shielding performance testing device. Background Technology

[0002] Cable shielding performance refers to its ability to resist electromagnetic interference (EMI) and prevent signal leakage. Key indicators include shielding effectiveness (dB) and transfer impedance (Z). t A network analyzer (VNA) is a core testing device for cable shielding performance. It evaluates shielding quality by measuring S-parameters: 1) Transfer impedance test (Z-parameters). t 1) A three-coaxial fixture is used to calculate the shielding barrier capability via S21; 2) Shielding attenuation test compares the S21 difference between shielded and unshielded cables; 3) Return loss (S11) reflects impedance matching; 4) Time domain reflectometer (TDR) locates physical defects. During testing, the cable must be kept straight (bending will cause an error of more than 5dB) and strictly calibrated.

[0003] Therefore, when testing the shielding performance of cables, clamps are needed to fix and straighten the cables. However, the existing technology mainly uses screws to hold the ends of the cables, which can cause uneven stress on the ends of the cables and deformation. It is also not convenient to quickly fix the cables. When there are a large number of cables to be tested, it will seriously affect the testing efficiency of the cables. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a cable shielding performance testing device that can overcome the above problems or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] A cable shielding performance testing device includes a support, and further includes: two symmetrically arranged slides slidably mounted on both sides of the support, wherein each slide is connected to a device block, the support is provided with an opening and closing part for driving the two slides to move away from or towards each other, and a network analyzer is fixedly mounted on the support; two circular holes are respectively provided on the two device blocks, wherein each of the two circular holes is connected to a plurality of circumferentially distributed inclined rods through a clamping component, the clamping component being used to drive one end of the inclined rods to move towards the axial direction of the circular hole.

[0007] Preferably, the opening and closing part includes a horizontal groove formed on the bracket, two slides are slidably installed in the horizontal groove, a double-ended threaded rod is rotatably connected in the horizontal groove, and the two slides are respectively threaded to both ends of the double-ended threaded rod.

[0008] Furthermore, a drive motor is fixedly installed on the bracket, and transmission gears are fixedly installed on both the output shaft of the drive motor and the outer wall of the double-threaded rod, with the two transmission gears meshing together.

[0009] Preferably, the clamping component includes a rotating seat fixedly connected to the inner wall of the circular hole, one end of the inclined rod is rotatably connected to the rotating seat, and a torsion spring is installed between the inclined rod and the inner wall of the circular hole.

[0010] Preferably, the end of the device block is provided with a sliding hole, a sliding rod is slidably installed in the sliding hole, a push plate is fixedly connected to the end of the sliding rod, and an inner tube facing the outer wall of the inclined rod is fixedly connected to the side wall of the push plate.

[0011] Preferably, the slide table is provided with a slide groove, the device block is slidably installed in the slide groove, and an elastic element is installed between the device block and the inner wall of the slide groove.

[0012] Furthermore, an annular airbag is fixedly installed on the inner wall of the circular hole, and the elastic element is an elastic telescopic airbag, which is fixedly connected to the annular airbag through a connecting tube.

[0013] Preferably, the force-bearing surface of the inclined rod is provided with anti-slip texture.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] 1. This utility model allows for quick and easy cable end fixing by inserting the cable end into a round hole and having multiple diagonal rods press their movable ends against the outer wall of the cable end under the action of torsion springs. This makes operation more convenient, and the multiple diagonal rods also make the cable end more evenly stressed, indirectly ensuring the efficiency of cable shielding performance testing.

[0016] 2. This utility model pushes the push plate, causing the inner tube to move towards the inclined rod. The inner tube then pushes the inclined rod towards the inner wall of the round hole through its end, causing the movable end of the inclined rod to gradually move away from the cable. At this time, the cable can be easily pulled out of the round hole, making the unloading of the cable very efficient and convenient.

[0017] 3. When the elastic element is compressed, it blows air into the annular airbag through the connecting tube. The annular airbag expands and presses against the inclined rods. The multiple inclined rods press against the axis of the circular hole, which makes the inclined rods clamp the cable more firmly and prevents the cable from becoming loose.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 A three-dimensional structural diagram of a cable shielding performance testing device proposed in this utility model. Figure 1 ;

[0021] Figure 2 A three-dimensional structural diagram of a cable shielding performance testing device proposed in this utility model. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the slide structure of a cable shielding performance testing device proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the device block of the cable shielding performance testing device proposed in this utility model;

[0024] Figure 5 This is a schematic diagram of the inclined rod structure of a cable shielding performance testing device proposed in this utility model.

[0025] In the diagram: 1. Support; 2. Network analyzer; 3. Slide table; 4. Horizontal groove; 5. Device block; 6. Circular hole; 7. Rotating seat; 8. Diagonal rod; 9. Push plate; 10. Slide rod; 11. Inner tube; 12. Slide groove; 13. Elastic element; 14. Annular airbag; 15. Connecting pipe; 16. Slide hole; 17. Drive motor; 18. Transmission gear; 19. Double-ended threaded rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0027] Example: Refer to Figures 1-5 A cable shielding performance testing device includes a support 1, and further includes: two symmetrically arranged slides 3 slidably mounted on both sides of the support 1, wherein each slide 3 is connected to a device block 5, the support 1 is provided with an opening and closing part for driving the two slides 3 to move away from or towards each other, a network analyzer 2 is fixedly mounted on the support 1, the network analyzer 2 is used to test the shielding performance of the cable; two circular holes 6 are respectively set on the two device blocks 5, the axes of the two circular holes 6 are collinear, wherein each of the two circular holes 6 is connected to a plurality of circumferentially distributed inclined rods 8 through a clamping component, the clamping component is used to drive one end of the inclined rod 8 to move towards the axis of the circular hole 6, the force-bearing surface of the inclined rod 8 is provided with anti-slip texture, the clamping component includes a rotating seat 7 fixedly connected to the inner wall of the circular hole 6, one end of the inclined rod 8 is rotatably connected to the rotating seat 7, and a torsion spring is installed between the inclined rod 8 and the inner wall of the circular hole 6, the torsion spring is not shown in the figure.

[0028] Specifically, in use, the end of the cable is inserted into the round hole 6. Under the action of the torsion spring, the movable ends of the multiple diagonal rods 8 press against the outer wall of the cable end, which can quickly complete the fixing of the cable end. The operation is more convenient, and the multiple diagonal rods 8 will make the cable end more evenly stressed. Then, the opening and closing part drives the two slides 3 to move away from each other. The two slides 3 can tighten the two ends of the cable and straighten the cable. Then, the output end of the network analyzer 2 is connected to the end of the cable, and the shielding performance test of the cable can be started.

[0029] The opening and closing part includes a horizontal groove 4 formed on the bracket 1, two slides 3 are slidably installed in the horizontal groove 4, and a double-threaded rod 19 is rotatably connected in the horizontal groove 4. The threads at both ends of the double-threaded rod 19 have opposite directions. The two slides 3 are respectively threaded to both ends of the double-threaded rod 19. A drive motor 17 is fixedly installed on the bracket 1. The output shaft of the drive motor 17 and the outer wall of the double-threaded rod 19 are both fixedly installed with transmission gears 18, and the two transmission gears 18 are meshed and connected.

[0030] Specifically, when it is necessary to straighten the cable, the drive motor 17 is started. The drive motor 17 drives the double-threaded rod 19 to rotate through two meshing transmission gears 18. The double-threaded rod 19 then drives the two slides 3 to move away from each other. The two slides 3 can then tighten the two ends of the cable, thereby straightening the cable. Conversely, when the output shaft of the drive motor 17 is reversed, the two slides 3 will move closer to each other, and the cable will bend.

[0031] The end of the aforementioned device block 5 is provided with a sliding hole 16, in which a sliding rod 10 is slidably installed. The end of the sliding rod 10 is fixedly connected to a push plate 9. The push plate 9 is circular in shape, and the side wall of the push plate 9 is fixedly connected to an inner tube 11 facing the outer wall of the inclined rod 8.

[0032] Specifically, after the test is completed, push the push plate 9 so that the push plate 9 drives the inner tube 11 to move towards the inclined rod 8. The inner tube 11 will push the inclined rod 8 towards the inner wall of the round hole 6 through its end, so that the movable end of the inclined rod 8 gradually moves away from the cable. At this time, the cable in the round hole 6 can be easily pulled out, making the unloading of the cable very efficient and convenient.

[0033] The slide table 3 is provided with a slide groove 12, the device block 5 is slidably installed in the slide groove 12, and an elastic element 13 is installed between the device block 5 and the inner wall of the slide groove 12.

[0034] Specifically, when the two slides 3 move away from each other and tighten the cable, the slides 3 will also slide in the slide groove 12 and press the elastic element 13. The elastic element 13 will give the slides 3 a reaction force, so that the cable on the two slides 3 can maintain a good straightening effect.

[0035] An annular airbag 14 is fixedly installed on the inner wall of the aforementioned circular hole 6. The elastic element 13 is an elastic telescopic airbag. The elastic element 13 is fixedly connected to the annular airbag 14 through the connecting pipe 15. Both the annular airbag 14 and the elastic element 13 are made of rubber.

[0036] Specifically, when the elastic element 13 is compressed, the elastic element 13 blows air into the annular airbag 14 through the connecting pipe 15. The annular airbag 14 then expands and presses against the inclined rod 8. The multiple inclined rods 8 press against the axis of the circular hole 6, which makes the inclined rods 8 clamp the cable more firmly and prevents the cable from becoming loose.

[0037] In use, this cable shielding performance testing device involves inserting the cable end into the circular hole 6. Multiple inclined rods 8, under the action of torsion springs, press their movable ends against the outer wall of the cable end, quickly securing the cable end. This makes operation more convenient, and the multiple inclined rods 8 ensure more even force distribution on the cable end. Then, the drive motor 17 is started, which drives the double-threaded rod 19 to rotate via two meshing transmission gears 18. The double-threaded rod 19 then moves the two slides 3 away from each other, tightening the cable ends and straightening it. The output of the network analyzer 2 is then connected to the cable end to begin the cable shielding performance test. After the test, the push plate 9 is pushed, causing the inner tube 11 to move towards the inclined rods 8. The inner tube 11 pushes the inclined rods 8 towards the inner wall of the circular hole 6, gradually moving the movable ends of the inclined rods 8 away from the cable. At this point, the cable can be easily pulled out of the circular hole 6, making cable unloading highly efficient and convenient.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A cable shielding performance testing device, comprising a support (1), characterized in that, Also includes: Two symmetrically arranged sliding platforms (3) are slidably mounted on both sides of the bracket (1). Among them, each of the two slides (3) is connected to a device block (5), the bracket (1) is provided with an opening and closing part that drives the two slides (3) to move away from or closer to each other, and a network analyzer (2) is fixedly installed on the bracket (1); Two circular holes (6) are respectively provided on the two device blocks (5). In this case, each of the two circular holes (6) is connected by a clamping component to a plurality of circumferentially distributed inclined rods (8), and the clamping component is used to drive one end of the inclined rod (8) to move toward the axis of the circular hole (6).

2. The cable shielding performance testing device according to claim 1, characterized in that, The opening and closing part includes a horizontal groove (4) formed on the bracket (1), and two slides (3) are slidably installed in the horizontal groove (4). A double-headed threaded rod (19) is rotatably connected in the horizontal groove (4), and the two slides (3) are threadedly connected to both ends of the double-headed threaded rod (19).

3. The cable shielding performance testing device according to claim 2, characterized in that, A drive motor (17) is fixedly installed on the bracket (1). The output shaft of the drive motor (17) and the outer wall of the double-threaded rod (19) are both fixedly installed with transmission gears (18), and the two transmission gears (18) are meshed together.

4. The cable shielding performance testing device according to claim 1, characterized in that, The clamping component includes a rotating seat (7) fixedly connected to the inner wall of the circular hole (6), one end of the inclined rod (8) is rotatably connected to the rotating seat (7), and a torsion spring is installed between the inclined rod (8) and the inner wall of the circular hole (6).

5. The cable shielding performance testing device according to claim 1, characterized in that, The end of the device block (5) is provided with a sliding hole (16), and a sliding rod (10) is slidably installed in the sliding hole (16). A push plate (9) is fixedly connected to the end of the sliding rod (10), and an inner tube (11) facing the outer wall of the inclined rod (8) is fixedly connected to the side wall of the push plate (9).

6. The cable shielding performance testing device according to claim 1, characterized in that, The slide table (3) is provided with a slide groove (12), the device block (5) is slidably installed in the slide groove (12), and an elastic element (13) is installed between the device block (5) and the inner wall of the slide groove (12).

7. The cable shielding performance testing device according to claim 6, characterized in that, An annular airbag (14) is fixedly installed on the inner wall of the circular hole (6). The elastic element (13) is an elastic telescopic airbag. The elastic element (13) is fixedly connected to the annular airbag (14) through a connecting pipe (15).

8. The cable shielding performance testing device according to claim 1, characterized in that, The inclined bar (8) has anti-slip texture on its force-bearing surface.

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