Electromagnetic shielding structure and testing equipment for a movable chain plate for adjusting wheelbase

Abstract

The present invention discloses an electromagnetic shielding structure and testing equipment for a movable chain plate for adjusting wheelbase, the electromagnetic shielding structure comprises a chain plate structure, the chain plate structure comprises a chain connected end to end, at least part of the outer periphery of the chain is connected to a plurality of chain plate bodies connected in series, the outer side of each chain plate body is connected to a second cover plate, a first gap is provided between two adjacent chain plate bodies, a metal spring is provided in the first gap, two adjacent chain plate bodies are electrically connected through the metal spring, a second gap is provided between two adjacent second cover plates, the first gap and the second gap are staggered, the second cover plate is located above the first gap to shield the first gap, and the chain plate body is located below the second gap to shield the second gap. The present invention realizes comprehensive electromagnetic shielding of the gap by electromagnetic shielding treatment of the gap soft connection, combined with the optimized chain plate and cover plate structure, and can completely eliminate the electromagnetic leakage problem, thereby fundamentally improving the accuracy and reliability of EMC testing.

Description

Technical Field

[0001] The invention relates to an electromagnetic shielding structure and testing equipment of a movable chain plate for adjusting wheelbase, belonging to the technical field of vehicle testing. Background Art

[0002] In recent years, with the rapid development of new energy and driverless car technologies, the market demand for dynamometers that support electromagnetic compatibility (EMC) performance testing has increased. As a test device installed as a whole below the ground, the dynamometer must ensure a good laboratory test environment above the ground. The cover structure on the top of the device, which is directly related to the test environment, is particularly important. The following two items are related to the cover structure in the overall performance of the test laboratory:

[0003] 1. Background noise: When the equipment is running at full power, the noise is 6DB-20DB lower than the benchmark required by the test. As the last barrier, the equipment cover structure should avoid gaps as much as possible to isolate the residual electromagnetic noise of the equipment in the space under the cover and prevent the residual electromagnetic noise from leaking through the gaps into the laboratory environment above the cover.

[0004] 2. Normalized Site Attenuation (NSA); NSA is an important parameter of the anechoic chamber and an important basis for the calibration or acceptance of the anechoic chamber. In the EMC anechoic chamber test, the transmission characteristics of electromagnetic waves are ensured to be close to those of an open field to reduce the interference of the internal structure of the anechoic chamber on the test signal. Therefore, the cover of the anechoic chamber equipment needs to have a high degree of flatness to avoid the concave and convex surface blocking the propagation of the test electromagnetic signal; at the same time, the anechoic chamber equipment cover needs to have good reflection performance for the test signal, and the electromagnetic signal shot onto the cover should be reflected as much as possible, and not too much should penetrate through the gap to the bottom of the cover.

[0005] However, since the EMC dynamometer needs to meet the test requirements of various models with different wheelbases, its shaft system often needs to be movable and adjustable, and a chain plate structure that moves with the wheelbase is essential. However, there must be many gaps in the chain plate structure, which may not only become channels for electromagnetic noise leakage, but also affect the transmission characteristics of the electromagnetic waves tested. Therefore, it is very important to deal with these gaps to better meet the EMC test requirements.

[0006] The existing electromagnetic shielding structure of the mobile chain plate for adjusting the wheelbase of the dynamometer basically meets the EMC test requirements by making the gap as small as possible, but this measure is often limited by the mechanical structure and adjustment range, and it is difficult to completely eliminate the electromagnetic leakage problem. Therefore, developing an electromagnetic shielding structure for the mobile chain plate for adjusting the wheelbase of the dynamometer that can not only meet the wheelbase adjustment requirements but also effectively deal with the electromagnetic leakage of the gap has become a key technical problem to improve the accuracy of EMC testing. Summary of the invention

[0007] In order to solve the above problems, the present invention provides an electromagnetic shielding structure and testing equipment for a movable chain plate for adjusting the wheelbase, which can not only meet the wheelbase adjustment requirements, but also effectively deal with the electromagnetic leakage of the gap. The present invention realizes the comprehensive electromagnetic shielding of the dynamometer shaft system gap by electromagnetic shielding treatment of the gap soft connection, combined with the optimized chain plate and cover plate structure, which can completely eliminate the electromagnetic leakage problem, thereby fundamentally improving the accuracy and reliability of EMC testing.

[0008] Specifically, the technical solution of the present invention is as follows:

[0009] On the one hand, the present invention provides an electromagnetic shielding structure of a movable chain plate for adjusting wheelbase, comprising a rotatable chain plate structure and a movable hub located in the chain plate structure, the upper end of the chain plate structure is provided with a mounting port for the hub to extend out, when the hub moves, the chain plate structure rotates to adapt to the tested vehicles with different wheelbases; the chain plate structure comprises a chain connected end to end and arranged in a ring shape, at least part of the outer periphery of the chain is connected to a plurality of chain plate bodies connected in series, a second cover plate is connected to the outer side of each chain plate body, a first gap is provided between two adjacent chain plate bodies, a metal spring is provided in the first gap, two adjacent chain plate bodies are electrically connected through the metal spring, a second gap is provided between two adjacent second cover plates, the first gap and the second gap are staggered, the second cover plate is located above the first gap to cover the first gap, and the chain plate body is located below the second gap to cover the second gap.

[0010] In one embodiment of the present invention, it further includes a first cover plate arranged around the chain plate structure, and the chain plate structure and the rotating hub are located below the first cover plate.

[0011] In one embodiment of the present invention, there is also a gap between several of the second cover plates and the first cover plate, the first cover plate is connected to a metal mesh via a mounting bracket, the metal mesh is elastic and connected to the chain plate body, and the chain plate body of the chain plate structure and the first cover plate are electrically connected via the mounting bracket and the metal mesh.

[0012] In one embodiment of the present invention, an elastic metal mesh and a mounting bracket for mounting the metal mesh are disposed between both ends of the chain plate body and the first cover plate.

[0013] In one embodiment of the present invention, the mounting bracket is bent downward from the bottom surface of the first cover plate, one end of the mounting bracket is fixedly connected to the first cover plate, and the other end is connected to the metal mesh.

[0014] In one embodiment of the present invention, the number of the chain plate structure and the number of the rotating hubs are both four, the four rotating hubs correspond to the four wheels of the tested vehicle respectively, the wheels of the tested vehicle are located on the rotating hubs and can rotate with them, and the chain plate structure rotates while the four rotating hubs move to adjust the distance between the front and rear rotating hubs to adapt to the tested vehicles with different wheelbases.

[0015] In one embodiment of the present invention, the top surfaces of the chain plate structure, the rotating hub, and the first cover plate are flush.

[0016] In one embodiment of the present invention, the chain plate body is a rectangular tube structure, a corner of the outer periphery away from one end of the second cover plate is covered with a mounting bar, the metal spring is sleeved outside the mounting bar and connects two adjacent chain plate bodies.

[0017] In one embodiment of the present invention, the metal spring sheet includes a first fixed end and a second fixed end connected thereto, an accommodating space is formed between the first fixed end and the second fixed end, the second fixed end is fixedly connected with an elastic abutting portion, and the elastic abutting portion is bent toward an end away from the first fixed end; the mounting strip is L-shaped, and the accommodating space is sleeved on the upper end of the L-shaped mounting strip, the first fixed end abuts against one of the two adjacent chain plate bodies, and the bent elastic abutting portion abuts against the other of the two adjacent chain plate bodies.

[0018] On the other hand, the present invention further provides a testing device, including the electromagnetic shielding structure of the movable chain plate for adjusting the wheelbase.

[0019] Beneficial effects of the present invention:

[0020] The electromagnetic shielding structure and test equipment of a movable chain plate for adjusting the wheelbase provided by the present invention can not only meet the wheelbase adjustment requirements, but also effectively deal with the electromagnetic leakage of the gap. Compared with the prior art, which basically meets the EMC test requirements by making the gap as small as possible, the present invention not only makes the gap as small as possible, but also performs soft connection electromagnetic shielding treatment on the gap. Specifically, the present invention sets a metal spring in the first gap between the two chain plate bodies, and the metal spring contacts the two adjacent chain plate bodies through elastic expansion and contraction, ensuring the electrical continuity between the chain plate bodies and the chain plate bodies during the movement of the chain plate structure. In addition, the electromagnetic shielding structure staggers the first gap and the second gap, so that the second cover plate is located above the first gap to block the first gap, and the chain plate body is located below the second gap to block the second gap, further ensuring that the residual electromagnetic noise under the cover plate will not leak through the gap to above the cover plate, and the test electromagnetic waves above the cover plate will not penetrate through the gap to below the cover plate, thereby maximally eliminating the electromagnetic leakage hidden dangers in the gap between the chain plates. In addition, since there is also a gap between the movable second cover plate and the fixed first cover plate, the electromagnetic shielding structure is provided with an elastic metal mesh and a fixed mounting bracket for installing the metal mesh between both ends of the chain plate body and the first cover plate. The metal mesh maintains the contact between the chain plate body and the mounting bracket through elastic expansion and contraction, thereby ensuring the electrical continuity between the chain plate structure and the first cover plate during the movement, thereby maximally eliminating the hidden danger of electromagnetic leakage in the gap between the two ends of the chain plate structure and the first cover plate, and ultimately ensuring the accuracy of the EMC test. Therefore, the present invention can not only meet the needs of wheelbase adjustment, but also effectively deal with gap electromagnetic leakage. The present invention realizes comprehensive electromagnetic shielding of the dynamometer shaft system gap by electromagnetic shielding treatment of the gap soft connection, combined with the optimized design of the chain plate and cover plate structure, which can completely eliminate the problem of electromagnetic leakage, thereby fundamentally improving the accuracy and reliability of the EMC test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A top view of the electromagnetic shielding structure of the movable chain plate for adjusting the wheelbase provided by the present invention.

[0022] Figure 2 for Figure 1 FF section view.

[0023] Figure 3 for Figure 2 A partial enlarged view of one of the chain plate structures and the hub.

[0024] Figure 4 for Figure 2 Middle GG section view.

[0025] Figure 5 for Figure 2 A partial enlarged view of H in the figure.

[0026] Figure 6 for Figure 4 A partial enlarged view of J in the figure.

[0027] Figure 7 for Figure 6 A partial enlarged view of K in the figure.

[0028] Figure 8 A partial three-dimensional diagram of the metal spring provided by the present invention.

[0029] In the figure: 1. chain plate structure; 2. first cover plate; 3. metal spring; 31. first fixed end; 32. second fixed end; 33. accommodating space; 34. elastic abutment portion; 4. rotating hub; 5. second cover plate; 6. chain plate body; 7. mounting bracket; 8. metal mesh; 9. mounting port; 10. chain; 11. chain; 12. mounting bar; 13. first gap; 14. second gap. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] Please refer to Figures 1 to 8The embodiment of the present invention provides an electromagnetic shielding structure of a movable chain plate for adjusting the wheelbase. In some embodiments, the electromagnetic shielding structure includes a rotatable chain plate structure 1, and a movable hub 4 located in the chain plate structure 1. The upper end of the chain plate structure 1 is provided with a mounting port 9 for the hub 4 to extend out. When the hub 4 moves, the chain plate structure 1 rotates to adapt to the tested vehicles with different wheelbases; the chain plate structure 1 includes a chain 10 connected end to end and arranged in a ring shape, and at least part of the outer periphery of the chain 10 is connected to a plurality of chain plate bodies connected in series. 6. A second cover plate 5 is connected to the outer side of each of the chain plate bodies 6. A first gap 13 is provided between two adjacent chain plate bodies 6. A metal spring 3 is provided in the first gap 13. The two adjacent chain plate bodies 6 are electrically connected through the metal spring 3. A second gap 14 is provided between two adjacent second cover plates 5. The first gap 13 and the second gap 14 are staggered. The second cover plate 5 is located above the first gap 13 to cover the first gap 13. The chain plate body 6 is located below the second gap 14 to cover the second gap 14.

[0034] Since the rotating hub 4 only needs to move within a certain range, the chain plate structure 1 only needs to rotate within a certain angle range, and does not need to rotate 360 ​​degrees. Therefore, it is only necessary to connect a number of chain plate bodies 6 in series on the outer periphery of the chain 10, thereby reducing the manufacturing cost of the equipment without affecting the normal operation of the equipment. Figure 2 and Figure 3 In this embodiment, the present invention only connects a plurality of chain plate bodies 6 in series at the upper part, one side, and the lower part of the chain 10 of the chain plate structure 1 .

[0035] In some embodiments, a first cover plate 2 is further included which is arranged around the chain plate structure 1 , and the chain plate structure 1 and the rotating hub 4 are located below the first cover plate 2 .

[0036] Furthermore, there is also a gap between several of the second cover plates 5 and the first cover plate 2. The first cover plate 2 is connected to a metal mesh 8 via a mounting bracket 7. The metal mesh 8 is elastic and connected to the chain plate body 6. The chain plate body 6 of the chain plate structure 1 is electrically connected to the first cover plate 2 via the mounting bracket 7 and the metal mesh 8.

[0037] Furthermore, an elastic metal mesh 8 and a mounting bracket 7 for mounting the metal mesh 8 are disposed between both ends of the chain plate body 6 and the first cover plate 2 .

[0038] Furthermore, the mounting bracket 7 is bent downward from the bottom surface of the first cover plate 2 , one end of which is fixedly connected to the first cover plate 2 , and the other end of which is connected to the metal mesh 8 .

[0039] Exemplarily, the metal mesh 8 and the mounting bracket 7 are made of conductive metal materials such as copper, which is not specifically limited.

[0040] Since there is also a gap between the movable second cover plate 5 and the fixed first cover plate 2, the electromagnetic shielding structure provided in this embodiment of the present invention is provided with an elastic metal mesh 8 and a fixed mounting bracket 7 for mounting the metal mesh 8 between both ends of the chain plate body 6 and the first cover plate 2. The metal mesh 8 maintains the contact between the chain plate body 6 and the mounting bracket 7 through elastic expansion and contraction, thereby ensuring the electrical continuity between the chain plate structure 1 and the first cover plate 2 during the movement, thereby eliminating the electromagnetic leakage risk existing in the gap between the two ends of the chain plate structure 1 and the first cover plate 2 to the greatest extent.

[0041] Optionally, top surfaces of the chain plate structure 1 , the rotating hub 4 , and the first cover plate 2 are flush.

[0042] Optionally, the width of the first gap 13 is greater than the width of the second gap 14 , and the present invention tries to make the gap as small as possible.

[0043] Optionally, the number of the chain plate structure 1 and the number of the rotating hubs 4 are both four, and the four rotating hubs 4 correspond to the four wheels of the tested vehicle respectively. The wheels of the tested vehicle are located on the rotating hubs 4 and can rotate with them. When the four rotating hubs 4 move, the chain plate structure 1 rotates to adjust the distance between the front and rear rotating hubs 4 to adapt to the tested vehicles with different wheelbases.

[0044] In some embodiments, the chain plate body 6 is a rectangular tube structure, and a corner of its outer periphery away from one end of the second cover plate 5 is covered with a mounting bar 12. The metal spring sheet 3 is sleeved outside the mounting bar 12 and connects two adjacent chain plate bodies 6.

[0045] Furthermore, the metal spring 3 includes a first fixed end 31 and a second fixed end 32 connected thereto, an accommodating space 33 is formed between the first fixed end 31 and the second fixed end 32, the second fixed end 32 is fixedly connected with an elastic abutting portion 34, and the elastic abutting portion 34 is bent toward an end away from the first fixed end 31; the mounting bar 12 is L-shaped, and the accommodating space 33 is sleeved on the upper end of the L-shaped mounting bar 12, the first fixed end 31 abuts against one of the two adjacent chain plate bodies 6, and the bent elastic abutting portion 34 abuts against the other of the two adjacent chain plate bodies 6.

[0046] Therefore, this embodiment realizes the installation of metal springs 3 in the first gap 13 between two adjacent chain plate bodies 6 through the L-shaped mounting strip 12, and the metal springs 3 are designed as an elastic structure, which can ensure that when the chain plate structure 1 rotates, several chain plate bodies 6 can move in series, thereby ensuring the electrical continuity between the chain plate bodies 6 and the chain plate bodies 6 during the movement of the chain plate structure 1, and can eliminate the hidden danger of electromagnetic leakage in the first gap 13 between the chain plate bodies 6 to the greatest extent.

[0047] Exemplarily, the material of the metal spring 3 is a conductive metal material such as copper, which is not specifically limited.

[0048] When in use, the vehicle being tested Figure 1 The vehicle travels in the direction of the middle arrow through the chain plate structure 1 onto the equipment, the wheels of the vehicle stop on the hub 4 and then carry out relevant testing work. The hub 4 drives the chain plate structure 1 to move forward and backward along the driving direction of the vehicle shown in the figure to control the spacing of the hub 4 to adapt to the wheelbase requirements of different vehicles. The electromagnetic shielding structure provided by the present invention has a chain plate structure 1 composed of a plurality of chain plate bodies 6 connected in series, and a second cover plate 5 is connected to the outer side of each chain plate body 6. The electromagnetic shielding structure is provided with a metal spring 3 in the first gap 13 between the two chain plate bodies 6, and the metal spring 3 contacts the two adjacent chain plate bodies 6 through elastic expansion and contraction, thereby ensuring the electrical continuity between the chain plate bodies 6 and the chain plate bodies 6 during the movement of the chain plate structure 1. Furthermore, since there is a second gap 14 between two adjacent second cover plates 5, the electromagnetic shielding structure staggers the first gap 13 and the second gap 14, so that the second cover plate 5 is located above the first gap 13 to block the first gap 13, and the chain plate body 6 is located below the second gap 14 to block the second gap 14, thereby maximally eliminating the electromagnetic leakage risk in the gap between the chain plates.

[0049] In addition, the present invention also provides a testing device, including the electromagnetic shielding structure of the movable chain plate for adjusting the wheelbase, and the testing device is used for testing a vehicle.

[0050] In summary, the electromagnetic shielding structure and test equipment for a movable chain plate for adjusting the wheelbase provided by the present invention can not only meet the wheelbase adjustment requirements, but also effectively deal with the electromagnetic leakage of the gap. Compared with the prior art, which basically meets the EMC test requirements by making the gap as small as possible, the present invention not only makes the gap as small as possible, but also performs soft connection electromagnetic shielding treatment on the gap. Specifically, the present invention sets a metal spring in the first gap between the two chain plate bodies, and the metal spring contacts the two adjacent chain plate bodies through elastic expansion and contraction, ensuring the electrical continuity between the chain plate bodies and the chain plate bodies during the movement of the chain plate structure. In addition, the electromagnetic shielding structure staggers the first gap and the second gap, so that the second cover plate is located above the first gap to block the first gap, and the chain plate body is located below the second gap to block the second gap, further ensuring that the residual electromagnetic noise under the cover plate will not leak through the gap to above the cover plate, and the test electromagnetic waves above the cover plate will not penetrate through the gap to below the cover plate, thereby maximally eliminating the electromagnetic leakage hidden dangers in the gap between the chain plates. In addition, since there is also a gap between the movable second cover plate and the fixed first cover plate, the electromagnetic shielding structure is provided with an elastic metal mesh and a fixed mounting bracket for installing the metal mesh between both ends of the chain plate body and the first cover plate. The metal mesh maintains the contact between the chain plate body and the mounting bracket through elastic expansion and contraction, thereby ensuring the electrical continuity between the chain plate structure and the first cover plate during movement, thereby maximally eliminating the hidden danger of electromagnetic leakage in the gap between the two ends of the chain plate structure and the first cover plate, and ultimately ensuring the accuracy of the EMC test.

[0051] Therefore, the present invention can not only meet the wheelbase adjustment requirements, but also effectively deal with gap electromagnetic leakage. The present invention realizes comprehensive electromagnetic shielding of the dynamometer shaft system gap by electromagnetic shielding of the gap soft connection, combined with the optimized chain plate and cover plate structure, and can completely eliminate the electromagnetic leakage problem, thereby fundamentally improving the accuracy and reliability of EMC testing.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. An electromagnetic shielding structure for a movable chain plate for adjusting wheelbase, characterized in that: The invention comprises a rotatable chain plate structure and a movable rotating hub located in the chain plate structure, wherein the upper end of the chain plate structure is provided with a mounting port for the rotating hub to extend out, and when the rotating hub moves, the chain plate structure rotates to adapt to the tested vehicles with different wheelbases; the chain plate structure comprises a chain connected end to end and arranged in a ring shape, wherein at least part of the outer periphery of the chain is connected to a plurality of chain plate bodies connected in series, a second cover plate is connected to the outer side of each of the chain plate bodies, a first gap is provided between two adjacent chain plate bodies, a metal spring is provided in the first gap, two adjacent chain plate bodies are electrically connected through the metal spring, and two adjacent chain plate bodies are electrically connected through the metal spring. There is a second gap between the second cover plates, the first gap and the second gap are staggered, the second cover plate is located above the first gap to cover the first gap, and the chain plate body is located below the second gap to cover the second gap; it also includes a first cover plate arranged around the chain plate structure, the chain plate structure and the rotating hub are located below the first cover plate; there is also a gap between several of the second cover plates and the first cover plate, the first cover plate is connected to a metal mesh through a mounting bracket, the metal mesh is elastic and connected to the chain plate body, and the chain plate body of the chain plate structure and the first cover plate are electrically connected through the mounting bracket and the metal mesh.

2. The electromagnetic shielding structure according to claim 1, characterized in that: An elastic metal mesh and a mounting bracket for mounting the metal mesh are arranged between both ends of the chain plate body and the first cover plate.

3. The electromagnetic shielding structure according to claim 1, characterized in that: The mounting bracket is bent downward from the bottom surface of the first cover plate, one end of the mounting bracket is fixedly connected to the first cover plate, and the other end is connected to the metal mesh.

4. The electromagnetic shielding structure according to claim 1, characterized in that: There are four chain plate structures and four rotating hubs, which correspond to four wheels of the tested vehicle respectively. The wheels of the tested vehicle are located on the rotating hubs and can rotate with them. The chain plate structure rotates while the four rotating hubs move to adjust the distance between the front and rear rotating hubs to adapt to the tested vehicles with different wheelbases.

5. The electromagnetic shielding structure according to claim 1, characterized in that: The top surfaces of the chain plate structure, the rotating hub, and the first cover plate are flush.

6. The electromagnetic shielding structure according to any one of claims 1 to 5, characterized in that: The chain plate body is a rectangular tube structure, and a corner of the outer periphery away from one end of the second cover plate is covered with a mounting strip. The metal spring sheet is sleeved outside the mounting strip and connects two adjacent chain plate bodies.

7. The electromagnetic shielding structure according to claim 6, characterized in that: The metal spring sheet includes a first fixed end and a second fixed end connected thereto, an accommodating space is formed between the first fixed end and the second fixed end, the second fixed end is fixedly connected with an elastic abutting portion, and the elastic abutting portion is bent toward an end away from the first fixed end; the mounting strip is L-shaped, and the accommodating space is sleeved on the upper end of the L-shaped mounting strip, the first fixed end abuts against one of the two adjacent chain plate bodies, and the bent elastic abutting portion abuts against the other of the two adjacent chain plate bodies.

8. A testing device, characterized in that: The electromagnetic shielding structure comprises the electromagnetic shielding structure as described in any one of claims 1 to 7.

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