An electromagnetic interference shielding device

Abstract

The utility model provides a kind of anti-electromagnetic interference device. Including: metal sealed box;Electromagnetic shielding component, electromagnetic shielding component is set in the side of metal sealed box. The utility model provides a kind of anti-electromagnetic interference device, through electromagnetic shielding component, metal cable shrink head, metal sealed box, insulating intermediate coupling etc. Structure mutually cooperate, when using, metal sealed box can preliminarily block internal electromagnetic signal to radiate outward, electromagnetic shielding component can enhance the shielding effect of metal sealed box side area, avoid electromagnetic signal from weak point leakage, metal cable shrink head can shield sealing to threading gap, prevent electromagnetic signal from cable interface leakage or external interference signal intrusion, insulating intermediate coupling can block the electromagnetic conduction path between metal transmission component, avoid electromagnetic signal through mechanical connection leakage, in this way, it is guaranteed that surrounding sensor is not disturbed, ensure the accuracy of data transmission.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic interference protection technology, and in particular to an electromagnetic interference protection device. Background Technology

[0002] In fields such as industrial automation and power electronics, electromagnetic interference generated during equipment operation is a key issue affecting system stability and measurement accuracy.

[0003] Taking an EMC dynamometer as an example, when testing the power of a vehicle, the high-power components such as the drive motor and frequency converter will release strong electromagnetic signals.

[0004] These electromagnetic signals can easily interfere with the signal transmission of surrounding sensors, leading to data distortion, control delays, and affecting the normal operation of related equipment and the accuracy of measurement results.

[0005] Therefore, it is necessary to provide an electromagnetic interference protection device to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides an electromagnetic interference prevention device, which solves the problem that electromagnetic signals can easily interfere with the signal transmission of surrounding sensors, affecting the normal operation of related equipment and the accuracy of measurement results.

[0007] To solve the above-mentioned technical problems, this utility model provides an electromagnetic interference protection device, comprising:

[0008] Metal sealed enclosure;

[0009] An electromagnetic shielding assembly is disposed on the side of the metal sealed enclosure;

[0010] A metal cable retractor is provided on the side of the metal sealed housing;

[0011] An insulating intermediate coupling is disposed on the inner side of the metal sealing housing.

[0012] Preferably, the metal cable retractor is disposed on the side of the electromagnetic shielding assembly.

[0013] Preferably, the electromagnetic interference protection device further includes an exhaust component and a filter component, wherein the exhaust component is disposed on one side of the electromagnetic shielding component and the filter component is disposed on the other side of the electromagnetic shielding component.

[0014] Preferably, the electromagnetic shielding assembly includes a mounting frame and an electromagnetic shielding honeycomb panel. The mounting frame is fixedly installed on the side of the metal sealed housing, and the electromagnetic shielding honeycomb panel is fixedly installed on the inner side of the mounting frame.

[0015] Preferably, the ventilation assembly includes a ventilation ring, a mounting bracket, a drive motor, and fan blades. The ventilation ring is fixedly installed on one side of the electromagnetic shielding honeycomb plate, the mounting bracket is fixedly installed on one end of the ventilation ring, the drive motor is fixedly installed on one side of the mounting bracket, and the fan blades are fixedly installed on the output end of the drive motor and located on the inner side of the ventilation ring.

[0016] Preferably, the filter assembly includes a mounting frame and a filter screen, the mounting frame being disposed on the other side of the electromagnetic shielding honeycomb plate, and the filter screen being fixedly installed on one side of the mounting frame.

[0017] Preferably, a groove is provided on the other side of the mounting bracket, and a second connector is fixedly installed on the inner side of the groove. A first connector is fixedly installed on the other side of the mounting frame, and the first connector and the second connector are compatible.

[0018] Compared with related technologies, the electromagnetic interference protection device provided by this utility model has the following beneficial effects:

[0019] This invention provides an electromagnetic interference protection device. Through the coordinated structure of an electromagnetic shielding component, a metal cable retractor, a metal sealed housing, and an insulating intermediate coupling, the device works as follows: During use, the metal sealed housing initially blocks the outward radiation of internal electromagnetic signals; the electromagnetic shielding component enhances the shielding effect on areas such as the sides of the metal sealed housing, preventing electromagnetic signal leakage from weak points; the metal cable retractor shields and seals the cable threading gaps, preventing electromagnetic signal leakage through cable interfaces or the intrusion of external interference signals; and the insulating intermediate coupling blocks the electromagnetic conduction path between metal transmission components, preventing electromagnetic signal leakage through mechanical connections. This ensures that surrounding sensors are not interfered with and guarantees the accuracy of data transmission. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a first embodiment of an anti-electromagnetic interference device provided by this utility model;

[0021] Figure 2 for Figure 1 The diagram shows a top view of the structure.

[0022] Figure 3 for Figure 1 The diagram shows the side structure.

[0023] Figure 4 A schematic diagram of the structure of a second embodiment of an anti-electromagnetic interference device provided by this utility model;

[0024] Figure 5 for Figure 4The diagram shows the structure of the electromagnetic shielding assembly.

[0025] Figure 6 for Figure 5 A schematic diagram of the electromagnetic shielding assembly from another perspective;

[0026] Figure 7 for Figure 4 The diagram shows the structure of the filter assembly.

[0027] The following are the labels in the diagram: 1. Electromagnetic shielding assembly, 2. Metal cable retractor, 3. Metal sealed housing, 4. Insulating intermediate coupling, 11. Mounting bracket, 12. Electromagnetic shielding honeycomb panel, 5. Filter assembly, 51. Mounting frame, 52. Filter screen, 6. Exhaust assembly, 61. Ventilation ring, 62. Fixing bracket, 63. Drive motor, 64. Fan blade, 7. First connector, 8. Groove, 9. Second connector. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] First Embodiment

[0030] Please refer to the following: Figure 1 , Figure 2 , Figure 3 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of an anti-electromagnetic interference device provided by this utility model; Figure 2 for Figure 1 The diagram shows a top view of the structure. Figure 3 for Figure 1 The diagram shows the side structure.

[0031] An electromagnetic interference protection device includes: a metal sealed housing 3;

[0032] Electromagnetic shielding component 1, wherein the electromagnetic shielding component 1 is disposed on the side of the metal sealed housing 3;

[0033] Metal cable retractor 2, which is disposed on the side of the metal sealed housing 3;

[0034] An insulating intermediate coupling 4 is disposed on the inner side of the metal sealing housing 3.

[0035] The metal cable retractor 2 is disposed on the side of the electromagnetic shielding assembly 1.

[0036] The metal sealed enclosure 3 is made of cold-rolled steel plate, utilizing the electromagnetic shielding properties of metal;

[0037] The metal cable retractor 2 is made of copper alloy and fits tightly with the housing 3, shielding and sealing the cable threading gaps to prevent electromagnetic signals from leaking through the cable interface or external interference signals from entering.

[0038] The working principle of the electromagnetic interference protection device provided by this utility model is as follows:

[0039] When in use, the frequency converter and drive motor are installed on the inner side of the metal sealed enclosure 3, and the metal sealed enclosure 3 initially blocks the internal electromagnetic signals from radiating outward.

[0040] The drive shaft of the internal components is connected to the external equipment through the insulating intermediate coupling 4. The insulating material of the insulating intermediate coupling 4 can block the electromagnetic conduction path between the metal transmission components and prevent electromagnetic signals from leaking through the mechanical connection.

[0041] The cables required for the equipment are threaded into the metal sealed housing 3 through the metal cable retractor 2;

[0042] The electromagnetic shielding component 1 is installed on the side of the metal sealed enclosure 3 to further enhance the shielding effect in local areas, especially for ventilation or opening areas on the side of the enclosure, to prevent electromagnetic signals from leaking from weak points, to ensure that surrounding sensors (such as torque sensors and speed sensors of EMC dynamometers) are not interfered with, and to ensure accurate data transmission.

[0043] Compared with related technologies, the electromagnetic interference protection device provided by this utility model has the following beneficial effects:

[0044] The electromagnetic shielding component 1, metal cable retractor 2, metal sealed housing 3, and insulating intermediate coupling 4 work together to ensure that, during use, the metal sealed housing 3 initially blocks the outward radiation of internal electromagnetic signals. The electromagnetic shielding component 1 enhances the shielding effect on areas such as the sides of the metal sealed housing, preventing electromagnetic signals from leaking from weak points. The metal cable retractor 2 shields and seals the cable threading gaps, preventing electromagnetic signals from leaking through the cable interface or external interference signals from entering. The insulating intermediate coupling 4 blocks the electromagnetic conduction path between metal transmission components, preventing electromagnetic signals from leaking through mechanical connections. In this way, the surrounding sensors are not interfered with, ensuring the accuracy of data transmission.

[0045] Second Embodiment

[0046] Please refer to the following: Figure 4 , Figure 5 , Figure 6 and Figure 7Based on the electromagnetic interference protection device provided in the first embodiment of this application, the second embodiment of this application proposes another electromagnetic interference protection device. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0047] Specifically, the second embodiment of this application provides an electromagnetic interference protection device that differs in that it further includes an exhaust component 6 and a filter component 5. The exhaust component 6 is disposed on one side of the electromagnetic shielding component 1, and the filter component 5 is disposed on the other side of the electromagnetic shielding component 1.

[0048] The electromagnetic shielding assembly 1 includes a mounting frame 11 and an electromagnetic shielding honeycomb plate 12. The mounting frame 11 is fixedly installed on the side of the metal sealed housing 3, and the electromagnetic shielding honeycomb plate 12 is fixedly installed on the inner side of the mounting frame 11.

[0049] The electromagnetic shielding honeycomb panel 12 adopts an aluminum honeycomb structure. The size and arrangement of its honeycomb holes are designed to ensure air circulation and utilize the electromagnetic shielding properties of the metal honeycomb to prevent internal electromagnetic signals from leaking through the ventilation openings.

[0050] The exhaust assembly 6 includes a ventilation ring 61, a fixing frame 62, a drive motor 63, and a fan blade 64. The ventilation ring 61 is fixedly installed on one side of the electromagnetic shielding honeycomb plate 12, the fixing frame 62 is fixedly installed on one end of the ventilation ring 61, the drive motor 63 is fixedly installed on one side of the fixing frame 62, and the fan blade 64 is fixedly installed on the output end of the drive motor 63 and located on the inner side of the ventilation ring 61.

[0051] The filter assembly 5 includes a mounting frame 51 and a filter screen 52. The mounting frame 51 is disposed on the other side of the electromagnetic shielding honeycomb plate 12, and the filter screen 52 is fixedly installed on one side of the mounting frame 51.

[0052] A groove 8 is provided on the other side of the mounting bracket 11. A second connector 9 is fixedly installed on the inner side of the groove 8. A first connector 7 is fixedly installed on the other side of the mounting frame 51. The first connector 7 and the second connector 9 are compatible.

[0053] The first connector 7 and the second connector 9 can be a metal plate and a magnetic plate, respectively. When in use, the metal plate and the magnetic plate are magnetically attracted to each other, which can install the mounting bracket 11 and the mounting frame 51. It also makes it easy for the user to disassemble the mounting frame 51 later, making it convenient for the user to use.

[0054] The working principle of the electromagnetic interference protection device provided by this utility model is as follows:

[0055] When installing the filter assembly 5, align the first connector 7 of the mounting frame 51 with the second connector 9 in the groove 8 of the mounting bracket 11, press the mounting frame 51 to complete the fixation, and the filter screen 52 covers the outer side of the electromagnetic shielding honeycomb plate 12.

[0056] When the equipment is running, the drive motor 63 of the exhaust component 6 is started, which drives the fan blades 64 to rotate in the ventilation ring 61, generating negative pressure airflow. The outside air first passes through the filter screen 52 to remove dust and impurities, and then passes through the electromagnetic shielding honeycomb plate 12 to enter the metal sealed box 3, carrying away the heat generated by the high-power components inside. Finally, it is discharged from other ventilation openings of the box, forming a heat dissipation cycle.

[0057] When the filter screen 52 is covered with a lot of dust, pull the mounting frame 51 in the opposite direction to disengage the first connector 7 from the second connector 9. Then the mounting frame 51 can be removed to clean or replace the filter screen 52. The operation is convenient.

[0058] Compared with related technologies, the electromagnetic interference protection device provided by this utility model has the following beneficial effects:

[0059] The exhaust assembly 6 enhances airflow and improves heat dissipation efficiency during use, preventing overheating of internal equipment. The filter assembly 5 intercepts dust during use, preventing it from entering the metal sealed housing 3, ensuring its cleanliness and extending the equipment's lifespan.

[0060] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An electromagnetic interference protection device, characterized in that, include: Metal sealed enclosure; An electromagnetic shielding assembly is disposed on the side of the metal sealed enclosure; A metal cable retractor is provided on the side of the metal sealed housing; An insulating intermediate coupling is disposed on the inner side of the metal sealing housing.

2. The electromagnetic interference protection device according to claim 1, characterized in that, The metal cable retractor is located on the side of the electromagnetic shielding assembly.

3. The electromagnetic interference protection device according to claim 1, characterized in that, It also includes an exhaust assembly and a filter assembly, wherein the exhaust assembly is disposed on one side of the electromagnetic shielding assembly and the filter assembly is disposed on the other side of the electromagnetic shielding assembly.

4. The electromagnetic interference protection device according to claim 3, characterized in that, The electromagnetic shielding assembly includes a mounting frame and an electromagnetic shielding honeycomb panel. The mounting frame is fixedly installed on the side of the metal sealed housing, and the electromagnetic shielding honeycomb panel is fixedly installed on the inner side of the mounting frame.

5. The electromagnetic interference protection device according to claim 4, characterized in that, The ventilation assembly includes a ventilation ring, a mounting bracket, a drive motor, and fan blades. The ventilation ring is fixedly installed on one side of the electromagnetic shielding honeycomb plate, the mounting bracket is fixedly installed on one end of the ventilation ring, the drive motor is fixedly installed on one side of the mounting bracket, and the fan blades are fixedly installed on the output end of the drive motor and located on the inner side of the ventilation ring.

6. The electromagnetic interference protection device according to claim 5, characterized in that, The filter assembly includes a mounting frame and a filter screen. The mounting frame is located on the other side of the electromagnetic shielding honeycomb plate, and the filter screen is fixedly installed on one side of the mounting frame.

7. The electromagnetic interference protection device according to claim 6, characterized in that, A groove is provided on the other side of the mounting bracket, and a second connector is fixedly installed on the inner side of the groove. A first connector is fixedly installed on the other side of the mounting frame, and the first connector and the second connector are compatible.

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