Wiring board for electromagnetic compatibility test

Abstract

The utility model belongs to the field of electromagnetic compatibility tests, and discloses a wiring board for an electromagnetic compatibility test. Comprising an insulating support plate; an input wire harness fixing unit; an output wire harness fixing unit; at least two adjustable wire harness positioning grooves, wherein a wire harness positioning path is arranged between two adjacent adjustable wire harness positioning grooves; the first wire harness fixer and the second wire harness fixer are arranged in the adjustable wire harness positioning groove in a sliding manner; one end of the wire pressing structure is rotationally connected with the second fixing part of the second wire harness fixer, and the other end is a free end which is provided with an opening matched with the first fixing part of the first wire harness fixer; the second screwing part is connected with the second fixing part, and the second screwing part controls the distance between the wire pressing rod and the upper surface of the insulating supporting plate and adjusts the pressing force on the wire harness. The first wire harness fixer and the second wire harness fixer are matched to adjust and position a wire harness path, so that the influence of a conventional wiring path on an electromagnetic compatibility test result is reduced, and the test accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic compatibility tests, and particularly to a wiring board for electromagnetic compatibility tests. Background Art

[0002] With the increasing functional integration of products such as electronic appliances and automotive electrical appliances, the interconnection wire harnesses are relatively complex, and their electromagnetic compatibility and safety have attracted wide attention. Electromagnetic compatibility and safety mainly characterize whether they can operate stably according to the expected performance requirements under specific electromagnetic interference conditions, and need to be evaluated through electromagnetic compatibility tests. Electromagnetic compatibility tests mainly include two parts: external emission (mainly including conducted emission and radiated emission) and resistance to external electromagnetic interference (such as electromagnetic radiation field and electromagnetic pulse, etc.). Due to the influence of factors such as parasitic capacitance and inductance inside and between wire harnesses, the layout and treatment methods of complex interconnection wire harnesses will significantly affect the results of electromagnetic compatibility tests to a certain extent. And the routing method of the interconnection cables carrying weak electrical communication signals has a more obvious impact on the results of electromagnetic compatibility tests. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a wiring board for electromagnetic compatibility tests.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A wiring board for electromagnetic compatibility tests, including,

[0005] An insulating support plate;

[0006] An input wire harness fixing unit, arranged on the surface of the insulating support plate to position the input end of the wire harness;

[0007] An output wire harness fixing unit, arranged on the surface of the insulating support plate to position the output end of the wire harness;

[0008] At least two adjustable wire harness positioning grooves, arranged in parallel on the surface of the insulating support plate, with their openings embedded inside the insulating support plate, and the wire harness positioning path is between adjacent two adjustable wire harness positioning grooves;

[0009] A first wire harness fixer, connected to one of the adjustable wire harness positioning grooves; it includes,

[0010] A first fixing component, slidably fixed in the adjustable wire harness positioning groove; and

[0011] A second wire harness fixer, connected to the other of the adjustable wire harness positioning grooves; it includes,

[0012] A second fixing component, slidably fixed in the adjustable wire harness positioning groove;

[0013] The wire pressing structure is located above the insulating support plate, with one end rotatably connected to the second fixing member and the other end being a free end. The free end has an opening matching the first fixing member.

[0014] The second tightening member is connected to the second fixing member and is located above the wire pressing structure.

[0015] Among them, the distance between the wire pressing rod and the upper surface of the insulating support plate is controlled by the second tightening member to adjust the pressing force on the wire harness. The first wire harness fixer and the second wire harness fixer cooperate to adjust and position the wire harness path, reduce the influence of the conventional wiring path on the electromagnetic compatibility test results, and improve the test accuracy.

[0016] According to the present invention, further, the first wire harness fixer includes a first tightening member connected to the first fixing member. The first tightening member is located above the insulating support plate and rotates up and down along the first fixing member. Adding a first tightening member to adjust the free end of the wire pressing structure improves the pressing force of the wire pressing structure on the wire harness and the pressing stability.

[0017] According to the present invention, further, a plurality of the first wire harness fixers are arranged at equal intervals in the adjustable wire harness positioning groove.

[0018] According to the present invention, further, a plurality of the second wire harness fixers are arranged at equal intervals in the adjustable wire harness positioning groove.

[0019] According to the present invention, further, the second fixing member is a second fixing bolt; the second tightening member is a second nut, and the second nut is sleeved on the outer periphery of the second fixing bolt; the wire pressing structure is a wire pressing rod.

[0020] According to the present invention, further, the first fixing member is a first fixing bolt, the first tightening member is a first nut, and the first nut is sleeved on the outer periphery of the first fixing bolt.

[0021] According to the present invention, further, an insulating elastic cushion block is arranged on the surface of the wire pressing structure facing the insulating support plate.

[0022] According to the present invention, further, toothed washers are arranged on the outer peripheries of the first fixing member and the second fixing member. The toothed washers are located above the insulating support plate. When the corresponding first tightening structure or second tightening structure is tightened, the toothed washers are in contact with the upper surface of the insulating support plate.

[0023] According to the present invention, further, the surface of the toothed washer in contact with the adjustable wire harness positioning groove is a flat straight stripe tooth shape; the contact surface with the corresponding first tightening structure or second tightening structure is a smooth surface.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] 1. The standardized layout of the wiring harness in the electromagnetic compatibility test is realized, and the length of the wiring harness arrangement is adjustable.

[0026] 2. The application of this device can effectively ensure the reproducibility and consistency of experimental results.

[0027] 3. The device can be placed directly on a metal ground reference plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a wiring board for electromagnetic compatibility testing according to the utility model from a first perspective;

[0029] Figure 2 It is a schematic diagram of a wiring board for electromagnetic compatibility testing of the utility model from a second viewing angle;

[0030] Figure 3 It is a schematic diagram of the fixed wiring harness state of the utility model;

[0031] Figure 4 This is a schematic diagram of the utility model in use.

[0032] In the figure, 1-insulating support plate, 2-input harness fixing unit, 3-adjustable harness positioning groove, 4-first harness fixing device, 41-first fixing bolt, 411-first nut, 5-second harness fixing device, 51-second fixing bolt, 511-second nut, 52-wire pressing rod, 6-output harness fixing unit, 7-insulating elastic pad, 8-toothed gasket. DETAILED DESCRIPTION

[0033] 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.

[0034] like Figure 1 As shown, a wiring board for electromagnetic compatibility testing is used to fix the direction of the interconnection harness, realize the standardized arrangement of the interconnection harness during the electromagnetic compatibility test, and adjust the length of the interconnection harness.

[0035] like Figures 1-4As shown in the figure, it includes an insulating support plate 1 as the support body, on the surface of which there are provided an input wire harness fixing unit 2 for fixing the wire harness, an output wire harness fixing unit 6 for fixing the wire harness, and an embedded adjustable wire harness positioning groove 3; the adjustable wire harness positioning groove 3 is strip-shaped, and a plurality of adjustable wire harness positioning grooves 3 are arranged in parallel, and the wire harness positioning path is between two adjacent adjustable wire harness positioning grooves 3; the first adjustable wire harness positioning groove 3 near the input wire harness fixing unit 2 is provided with a first wire harness fixer 4 that can adjust its position along its length direction, and the remaining adjustable wire harness positioning grooves 3 are provided with second wire harness fixers 5 that can adjust their positions along their length directions; among them, the first wire harness fixer 4 includes a first fixing bolt 41 embedded in the adjustable wire harness positioning groove 3, and a first nut 411 is sleeved on the outer periphery of the first fixing bolt 41, and the first nut 411 is located above the insulating support plate 1; rotate the first nut 411 to adjust the distance between the bottom surface of the first nut 411 and the upper surface of the insulating support plate 1; the second wire harness fixer 5 includes a second fixing bolt 51 embedded in the adjustable wire harness positioning groove 3, and a pressing rod 52 and a second nut 511 are sleeved on the outer periphery of the second fixing bolt 51 from bottom to top in sequence, and both are located above the insulating support plate 1, and the pressing rod 52 can rotate 360° along the outer periphery of the second fixing bolt 51; an opening is formed at the free end of the pressing rod 52 to cooperate with the first fixing bolt 41 or the second fixing bolt 51 to be connected thereto.

[0036] When the wire harness needs to be positioned on the wire harness board positioning path in the first column, loosen the first nut 411 to disengage it from the first fixing bolt 41, rotate the pressing rod 52 to connect it to the first fixing bolt 41, place the wire harness between the pressing rod 52 and the insulating support plate 1, and rotate the first nut 411 and the second nut 511 to adjust the distance between the bottom surface of the second nut 511 and the upper surface of the insulating support plate 1 until the position of the wire harness is firmly fixed; when the wire harness needs to be positioned on the wire harness board positioning paths in the second column and the Nth column, loosen the second nut 511 in the previous column to disengage it from the corresponding second fixing bolt 51, rotate the pressing rod 52 to connect it to the second fixing bolt 51 in the previous column, place the wire harness between the pressing rod 52 and the insulating support plate 1, and rotate the second nuts 511 in the two columns to adjust the distance between the bottom surface of the second nut 511 and the upper surface of the insulating support plate 1 until the position of the wire harness is firmly fixed. Optionally, the thickness of the insulating support plate 1 is 1 cm - 15 cm. Preferably, the thickness is (50 ± 5) mm or (100 ± 50) mm. Preferably, the dielectric constant of the insulating support plate 1 is less than 1.4. Both the input wire harness fixing unit 2 and the output wire harness fixing unit 6 include a first wire harness fixer 4 and a second wire harness fixer 5 that cooperate with it to fix the wire harness. The wire harness is first fixed by the input wire harness fixing unit 2, and then passes through the wire harness positioning path and is fixed by the output wire harness fixing unit 6 to complete the wiring operation of the wire harness. Among them, both the first fixing bolt 41 and the second fixing bolt 51 are insulating bolts.

[0037] To improve the flatness of the wire harness and prevent it from deforming or bulging, there are multiple first wire harness fixators 4 and multiple second wire harness fixators 5, which are distributed along the length direction of their respective adjustable wire harness positioning grooves 3. Preferably, the multiple wire harness fixators provided in each adjustable wire harness positioning groove 3 are equally spaced, making the clamping force on the wire harness more uniform, ensuring the flatness of each section of the wire harness, and improving the wiring qualification rate.

[0038] In this embodiment, an insulating elastic cushion block 7 is provided on the surface of the wire pressing rod 52 facing the insulating support plate 1. The size of the insulating elastic cushion block 7 matches the surface of the corresponding wire pressing rod 52, which plays an insulating role while preventing the wire harness from deforming under pressure.

[0039] In this embodiment, a toothed gasket 8 is provided on the outer periphery of the first fixing bolt 41 and the second fixing bolt 51. The toothed gasket 8 is located above the insulating support plate 1. When the corresponding first nut 411 or second nut 511 is tightened, the toothed gasket 8 is in contact with the upper surface of the insulating support plate 1. The surface of the toothed gasket 8 in contact with the adjustable wire harness positioning groove is a flat straight stripe tooth shape; the contact surface with the corresponding first nut 411 and second nut 511 is a smooth surface. Preferably, a square gasket is used, and its size corresponds to the width of the adjustable wire harness positioning groove 3.

[0040] Although the embodiments of the utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A wiring board for electromagnetic compatibility tests, characterized in that, Including, Insulating support plate; Input wire harness fixing unit, arranged on the surface of the insulating support plate to position the input end of the wire harness; Output wire harness fixing unit, arranged on the surface of the insulating support plate to position the output end of the wire harness; Adjustable wire harness positioning grooves, at least two, arranged in parallel on the surface of the insulating support plate, with their openings embedded inside the insulating support plate, and a wire harness positioning path is formed between two adjacent adjustable wire harness positioning grooves; First wire harness fixer, connected to one of the adjustable wire harness positioning grooves; it includes, First fixing component, slidably fixed in the adjustable wire harness positioning groove; and Second wire harness fixer, connected to the other of the adjustable wire harness positioning grooves; it includes, Second fixing component, slidably fixed in the adjustable wire harness positioning groove; Pressing wire structure, located above the insulating support plate, rotatably connected to the second fixing component at one end, with the other end being a free end, and the free end has an opening matching the first fixing component; Second tightening component, connected to the second fixing component and located above the pressing wire structure; Wherein, the distance between the pressing wire rod and the upper surface of the insulating support plate is controlled by the second tightening component to adjust the pressing force on the wire harness.

2. The wiring board for electromagnetic compatibility test according to claim 1, characterized in that The first wire harness fixer includes a first tightening component connected to the first fixing component, the first tightening component is located above the insulating support plate, and the first tightening component rotates up and down along the first fixing component.

3. The wiring board for electromagnetic compatibility test according to claim 1, characterized in that A plurality of the first wire harness fixers are arranged at equal intervals in the adjustable wire harness positioning groove.

4. The wiring board for electromagnetic compatibility test according to claim 1 or 3, characterized in that, A plurality of the second wire harness fixers are arranged at equal intervals in the adjustable wire harness positioning groove.

5. The wiring board for electromagnetic compatibility test according to claim 1, wherein, The second fixing component is a second fixing bolt; the second tightening component is a second nut, and the second nut is sleeved on the outer periphery of the second fixing bolt; the pressing wire structure is a pressing wire rod.

6. The wiring board for electromagnetic compatibility test according to claim 2, characterized in that, The first fixing component is a first fixing bolt, the first tightening component is a first nut, and the first nut is sleeved on the outer periphery of the first fixing bolt.

7. The wiring board for electromagnetic compatibility test according to claim 1, characterized in that, An insulating elastic cushion block is arranged on the surface of the pressing wire structure facing the insulating support plate.

8. The wiring board for electromagnetic compatibility test according to claim 2, characterized in that, Tooth-shaped gaskets are arranged on the outer peripheries of the first fixing component and the second fixing component, the tooth-shaped gaskets are located above the insulating support plate, and when the corresponding first tightening structure or second tightening structure is tightened, the tooth-shaped gaskets are in contact with the upper surface of the insulating support plate.

9. The wiring board for electromagnetic compatibility test according to claim 8, characterized in that, The surface of the tooth-shaped gasket in contact with the adjustable wire harness positioning groove is a flat straight stripe tooth shape; the contact surface with the corresponding first tightening structure or second tightening structure is a smooth surface.

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