Wire harness shielding box and signal testing device

Abstract

The utility model provides a wire harness shielding box and a signal testing device, the wire harness shielding box comprises a box body and a box cover hinged on the box body, the box body is composed of a bottom plate and side plates, two ends of one side plate are correspondingly provided with vertical sliding grooves, and sliding plates are arranged in the sliding grooves in a sliding manner; a window is formed in the middle of the sliding plate, an adapter plate is arranged on the window, and an interface is formed in the middle of the adapter plate; the other side plate corresponding to the adapter plate is provided with a jack; a clamping groove and a clamping table higher than the clamping groove are arranged at the upper end of the side plate, and a clamping block capable of being clamped on the clamping table is arranged on the box cover; the box cover is clamped on the box body through a buckle device. When different high-voltage connection systems need to be tested, only the adapter plate needs to be replaced, the adapter plate is fixed on the window of the sliding plate through the screws, and the replacement process is convenient and fast; and through arrangement of a clamping groove, a clamping table and a clamping block, the sealing effect between the box cover and the box body can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire harness shielding test, in particular to a wire harness shielding box and a signal testing device. Background Art

[0002] Automotive wiring harness is a device that transmits or exchanges power signals or data signals of electrical systems to realize the functions of electrical systems. As people's requirements for automotive comfort and safety increase, the types of electronic products in cars are also increasing, and the distribution of automotive wiring harnesses is becoming more and more complex.

[0003] A large number of theories and experiments have confirmed that, on the one hand, 90% of the systems cannot pass the radiation emission test or interfere with nearby equipment due to the electromagnetic radiation of wires and cables. On the other hand, external electromagnetic interference will also affect the normal operation of the equipment through coupling with the cables, resulting in operational failures and other phenomena, seriously threatening the safety of life and property of the people on the vehicle. In order to reduce the external radiation of the cable and improve its anti-interference ability, the use of shielded cables is a simple and effective method. Therefore, the shielding effect of the wiring harness has become one of the key factors in determining the electromagnetic compatibility of electric vehicles.

[0004] Due to the variety of shielding layers of shielded cables, different shielding materials and shielding structures, the shielding effectiveness of cables can vary greatly. In order to provide a specific and accurate reference tool for electric vehicle design, the shielding effectiveness of shielded cables must be tested.

[0005] The shielding box is the main test fixture, because there is no unified standard for the interface of the high-voltage wire harness on the market. The size and shape of the interface of the high-voltage wire harness are customized according to the requirements of the car manufacturer, which makes the size and shape of the interface of the high-voltage wire harness inconsistent, thus making the versatility of the shielding box poor. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a wire harness shielding box and a signal testing device, which are used to solve the problem of poor versatility of the shielding box for different high-voltage wire harness interfaces in the prior art.

[0007] In order to achieve the above purpose and other related purposes, the utility model provides the following technical solutions:

[0008] A wire harness shielding box comprises a box body and a box cover hinged on the box body, the box body consists of a bottom plate and side plates, two ends of one side plate are respectively provided with vertical slide grooves, a slide plate is slidably provided in the slide groove; a window is provided in the middle of the slide plate, an adapter plate is provided on the window, and an interface is opened in the middle of the adapter plate; a socket is provided on the other side plate corresponding to the adapter plate; a clamping groove and a clamping platform higher than the clamping groove are provided at the upper end of the side plate, and a clamping block that can be clamped on the clamping platform is provided on the box cover; the box cover is clamped to the box body by a clamping device.

[0009] To implement the above technical solution, in the present application, since the box cover is hinged on the box body and is clamped by the buckle device, it is convenient to open it for testing different wiring harnesses, and since the side panel of the shielding box needs to be connected to a high-voltage connector, and there are many types of high-voltage connectors on the market and their sizes are inconsistent, the setting of the call slide in the present application makes it easy to pull out and take out the slide groove, and different high-voltage connectors can be set by different adapter plates. Therefore, when different high-voltage connection system tests are required, only the adapter plate needs to be replaced. The adapter plate is fixed to the window of the slide plate by screws, and the replacement process is convenient and quick; through the setting of the clamping groove, the clamping platform and the clamping block, the sealing effect between the box cover and the box body can be greatly improved.

[0010] In one embodiment of the utility model, the buckle device includes a clamping plate arranged on the box cover, the clamping plate is provided with a plurality of clamping slots, and a side plate corresponding to the clamping plate is provided with a clamping spring for clamping in the clamping slot.

[0011] To implement the above technical solution, when a sealing test is required in the present application, it is only necessary to clamp the retaining spring on the retaining groove, and the tightness between the retaining spring and the retaining plate can be adjusted by setting a plurality of the retaining grooves to ensure the sealing between the box cover and the box body.

[0012] In an embodiment of the present invention, a high voltage connector is correspondingly provided in the interface, and a radio frequency connector is correspondingly provided in the socket.

[0013] To implement the above technical solution, the high-voltage connector is used to connect the wire harness shielding box and the high-voltage connection system, and the radio frequency connector is used to connect the wire harness shielding box and the network analyzer.

[0014] In an embodiment of the present invention, the box body and the cover plate are made of stainless steel, aluminum alloy or magnesium alloy.

[0015] To implement the above technical solution, the shielding box made of stainless steel has the advantages of strong corrosion resistance, high temperature resistance and wear resistance, and the shielding box made of magnesium alloy or aluminum alloy has light weight and low cost.

[0016] In an embodiment of the present invention, the inner sides of the side panels, the bottom panel and the engaging blocks are all provided with absorbing cotton or absorbing glue.

[0017] To implement the above technical solution, the arrangement of the absorbing cotton and the absorbing glue can absorb the reflected waves of the wireless signals inside the shielding box.

[0018] In one embodiment of the present invention, a handle is provided on the box cover.

[0019] To implement the above technical solution, during the test, since the shielding box often needs to be moved, the shielding box can be easily moved by providing a handle.

[0020] In one embodiment of the utility model, a signal testing device includes: a grounding plate; a high-voltage connection system; a current probe vertically arranged in the middle of the high-voltage connection system; two wire harness shielding boxes are provided and placed on the grounding plate, and are symmetrically arranged at both ends of the high-voltage connection system through high-voltage connectors; a wire harness located in the wire harness shielding box and connected between the high-voltage connector and the radio frequency connector; a network analyzer connected to the current probe and one of the wire harness shielding boxes; and a terminal resistor connected to the other wire harness shielding box.

[0021] To implement the above technical solution, the grounding plate has a grounding function, and the electromagnetic shielding effectiveness of the high-voltage connection system is measured by a current probe, and the measurement range is 150kHz-108MHz. The terminal resistance is preferably 50Ω for absorbing the test signal injected by the signal source.

[0022] In one embodiment of the utility model, the network analyzer and the terminal resistor are both connected to the RF connector on the wiring harness shielding box; the current probe is connected to the input end of the network analyzer through an RF coaxial cable; and the wiring harness shielding box is connected to the output end of the network analyzer through an RF coaxial cable.

[0023] To implement the above technical solution, the network analyzer adopts peak detection method, and the test bandwidth, step length, sweep time and dwell time must meet relevant requirements.

[0024] In an embodiment of the present invention, the network analyzer can be replaced by a signal source connected to the harness shielding box and a receiver connected to the current probe.

[0025] The test is performed by using a separate signal source and receiver combination instead of a network analyzer. This can meet the signal power required for the experiment and facilitate accurate results. At the same time, it is necessary to control the signal source and receiver to be synchronized at each single frequency point, that is, the signal source outputs a signal at a single frequency point, and the receiver measures a signal accordingly.

[0026] As described above, a wiring harness shielding box and a signal testing device of the utility model have the following beneficial effects: in the present application, since the box cover is hinged on the box body and is clamped by the buckle device, it is convenient to open for testing different wiring harnesses, and since the side panel of the shielding box needs to be connected to a high-voltage connector, and since there are many types of high-voltage connectors on the market and their sizes are inconsistent, the setting of the call slide in the present application makes it easy to pull out and take out in the slide groove, and different high-voltage connectors can be set through different adapter plates. Therefore, when different high-voltage connection system tests are required, only the adapter plate needs to be replaced. The adapter plate is fixed to the window of the slide plate by screws, and the replacement process is convenient and quick; through the setting of the clamping groove, the clamping platform and the clamping block, the sealing effect between the box cover and the box body can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shown is a schematic diagram of the structure of the wire harness shielding box.

[0028] Figure 2 Shown is another structural schematic diagram of the wire harness shielding box.

[0029] Figure 3 Shown is a schematic diagram of the structure of a skateboard.

[0030] Figure 4 Display as Figure 1 A partial enlarged view of point A in the middle.

[0031] Figure 5 Shown is a schematic diagram of the structure of the signal testing device.

[0032] Figure 6 Shown is another structural schematic diagram of a signal testing device.

[0033] Component number description

[0034] 1. Box cover; 2、 skateboard; 3、 window; 4、 Adapter plate; 5、 interface; 6、 jack; 7、 Snap-fit ​​slot; 8、 Card table; 9. Card block; 10、 Pallet; 11、 Card slot; 12、 Circlip; 13、 High voltage connectors; 14、 RF connector; 15、 Handle; 16. High voltage connection system; 17. Current probe; 18、 Wire harness shielding box; 19、 Network analyzer; 20、 Terminal resistance; 21、 Signal source;22、 Receiver. DETAILED DESCRIPTION

[0035] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0036] See also Figures 1 to 4 The utility model provides a wiring harness shielding box, comprising a box body and a box cover 1 hinged on the box body, the box body is composed of a bottom plate and side plates, two ends of one of the side plates are correspondingly provided with vertical slide grooves, a slide plate 2 is slidably provided in the slide groove; a window 3 is provided in the middle of the slide plate 2, an adapter plate 4 is provided on the window 3, and an interface 5 is opened in the middle of the adapter plate 4; a socket 6 is provided on the other side plate corresponding to the adapter plate 4; a clamping groove 7 and a clamping platform 8 higher than the clamping groove 7 are provided at the upper end of the side plate, a clamping block 9 that can be clamped on the clamping platform 8 is provided on the box cover 1; the box cover 1 is clamped on the box body through a clamping device.

[0037] In the present application, since the box cover 1 is hinged on the box body and is clamped by the buckle device, it is convenient to open it for testing different wiring harnesses. And since the side panel of the shielding box needs to be connected to the high-voltage connector 13, and there are many types of high-voltage connectors 13 on the market and the sizes are inconsistent, the setting of the call slide 2 in the present application is convenient for pulling and taking out in the slide groove, and different high-voltage connectors 13 can be set through different adapter plates 4. Therefore, when different high-voltage connection systems 16 need to be tested, it is only necessary to replace the adapter plate 4. The adapter plate 4 is fixed to the window 3 of the slide plate 2 by screws, and the replacement process is convenient and quick. By setting the locking groove 7, the clamping platform 8 and the locking block 9, the sealing effect between the box cover 1 and the box body can be greatly improved.

[0038] The buckle device comprises a clamping plate 10 arranged on the box cover 1 , the clamping plate 10 is provided with a plurality of clamping slots 11 , and a side plate corresponding to the clamping plate 10 is provided with a clamping spring 12 for clamping in the clamping slots 11 .

[0039] In the present application, when a sealing test is required, the retaining spring 12 only needs to be clamped on the retaining groove 11, and the tightness between the retaining spring 12 and the retaining plate 10 can be adjusted by setting a plurality of the retaining grooves 11 to ensure the sealing between the box cover 1 and the box body.

[0040] The interface 5 is provided with a high voltage connector 13, and the socket 6 is provided with a radio frequency connector 14. The high voltage connector 13 is used to connect the wire harness shielding box 18 and the high voltage connection system 16, and the radio frequency connector 14 is used to connect the wire harness shielding box 18 and the network analyzer 19.

[0041] The box body and the cover plate are made of stainless steel, aluminum alloy or magnesium alloy. The shielding box made of stainless steel has the advantages of strong corrosion resistance, high temperature resistance and wear resistance, while the shielding box made of magnesium alloy or aluminum alloy is light in weight and low in cost.

[0042] The side panels, the bottom panel and the inner side surfaces of the clamping block 9 are all provided with absorbing cotton or absorbing glue. The absorbing cotton and absorbing glue can absorb the reflected waves of the wireless signals inside the shielding box.

[0043] The box cover 1 is provided with a handle 15. During the test, since the shielding box often needs to be moved, the shielding box is conveniently carried by the provision of the handle 15.

[0044] like Figure 5 As shown, a signal testing device includes a grounding plate; a high-voltage connection system 16; a current probe 17 vertically arranged in the middle of the high-voltage connection system 16; two wire harness shielding boxes 18 are provided and placed on the grounding plate, and are symmetrically arranged at both ends of the high-voltage connection system 16 through the high-voltage connector 13; a wire harness located in the wire harness shielding box 18 and connected between the high-voltage connector 13 and the RF connector 14; a network analyzer 19 connected to the current probe 17 and one of the wire harness shielding boxes 18; and a terminal resistor 20 connected to the other wire harness shielding box 18. The grounding plate has a grounding function, and the electromagnetic shielding effectiveness of the high-voltage connection system 16 is measured by the current probe 17, and the measurement range is 150kHz-108MHz. The terminal resistor 20 is preferably 50Ω for absorbing the test signal injected by the signal source 21.

[0045] The network analyzer 19 and the terminal resistor 20 are both connected to the RF connector 14 on the harness shielding box 18; the current probe 17 is connected to the input end of the network analyzer 19 via a RF coaxial cable; the harness shielding box 18 is connected to the output end of the network analyzer 19 via a RF coaxial cable. The network analyzer 19 adopts a peak detection method, and the test bandwidth, step length, sweep time and dwell time must meet relevant requirements.

[0046] like Figure 6As shown, the network analyzer 19 can be replaced by a signal source 21 connected to the harness shielding box 18 and a receiver 22 connected to the current probe 17. The network analyzer 19 is replaced by a combination of a separate signal source 21 and a receiver 22 for testing, which can meet the signal power required for the experiment and facilitate accurate results. At the same time, the signal source 21 and the receiver 22 need to be controlled to be synchronized at each single frequency point, that is, the signal source 21 outputs a signal at a single frequency point, and the receiver 22 measures a signal accordingly.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A wire harness shielding box, comprising a box body and a box cover hinged on the box body, characterized in that: The box body is composed of a bottom plate and side plates, and two ends of one of the side plates are respectively provided with vertical slide grooves, and a slide plate is slidably provided in the slide groove; A window is provided in the middle of the slide plate, an adapter plate is provided on the window, and an interface is provided in the middle of the adapter plate; A socket is provided on the other side plate corresponding to the adapter plate; The upper end of the side plate is provided with a clamping groove and a clamping platform higher than the clamping groove, and the box cover is provided with a clamping block that can be clamped on the clamping platform; The box cover is clamped on the box body through a buckle device.

2. A wire harness shielding box according to claim 1, characterized in that: The buckle device comprises a clamping plate arranged on the box cover, the clamping plate is provided with a plurality of clamping slots, and a side plate corresponding to the clamping plate is provided with a clamping spring for clamping in the clamping slots.

3. The wire harness shielding box according to claim 1, characterized in that: A high voltage connector is correspondingly arranged in the interface, and a radio frequency connector is correspondingly arranged in the socket.

4. The wire harness shielding box according to claim 1, characterized in that: The box body and the cover plate are made of stainless steel, aluminum alloy or magnesium alloy.

5. The wire harness shielding box according to claim 1, characterized in that: The inner sides of the side plates, the bottom plate and the clamping blocks are all provided with absorbing cotton or absorbing glue.

6. The wire harness shielding box according to claim 1, characterized in that: A handle is provided on the box cover.

7. A signal testing device, characterized in that: include: Ground plate; High voltage connection system; A current probe vertically arranged in the middle of the high voltage connection system; The wire harness shielding box according to claim 3, wherein two wire harness shielding boxes are provided and placed on the grounding plate, and are symmetrically arranged at both ends of the high voltage connection system through high voltage connectors; A wire harness located in the wire harness shielding box and connected between the high voltage connector and the radio frequency connector; a network analyzer connected to the current probe and one of the wire harness shielding boxes; A terminal resistor connected to another of the harness shielding boxes.

8. A signal testing device according to claim 7, characterized in that: The network analyzer and the terminal resistor are both connected to the radio frequency connector on the wiring harness shielding box; The current probe is connected to the input end of the network analyzer via a radio frequency coaxial cable; The harness shielding box is connected to the output end of the network analyzer via a radio frequency coaxial cable.

9. A signal testing device according to claim 7, characterized in that: The network analyzer may be replaced by a signal source connected to the harness shielding box and a receiver connected to the current probe.

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