Electromagnetic shielding box of high-voltage connection system

Abstract

The utility model provides an electromagnetic shielding box for a high-voltage connection system, and relates to the field of electromagnetic shielding boxes. The electromagnetic shielding box of the high-voltage connection system comprises a resistor side shielding box body and a receiving end shielding box body, a high-voltage connector and a shielding cover plate are arranged outside the resistor side shielding box body, a radio frequency connector is fixedly communicated with the surface of the receiving end shielding box body, and a connection plate is arranged on the surface of the resistor side shielding box body. According to the utility model, through the resistor side shielding box body and the receiving end shielding box body, the resistor side shielding box body is used for internally installing a 50-ohm matching resistor, and the receiving end shielding box body is used for connecting signal source output. One end of the shielding box body is embedded into a radio frequency connector to facilitate connection of signal source output, and the other end is embedded into a high-voltage connector and a shielding layer of the high-voltage connection system. The device basically meets the test of high-voltage connection systems of all vehicle factories, and is used for evaluating the shielding performance of high-voltage wiring harnesses and connectors to ensure that electromagnetic interference is effectively controlled.

Description

Technical Field

[0001] The utility model relates to an electromagnetic shielding box, in particular to an electromagnetic shielding box for a high-voltage connection system, belonging to the technical field of electromagnetic shielding boxes. Background Art

[0002] Electromagnetic shielding means that an electronic device neither interferes with other devices nor is affected by other devices. Therefore, the shielding body has the function of reducing interference. First, it limits the power lines or magnetic lines to a certain area; second, it prevents a certain area from being affected by external power lines and magnetic lines.

[0003] With the increasing use of high-voltage electrical and electronic devices in automobiles, high-voltage devices are susceptible to interference from electromagnetic signals. OEMs basically regard wiring harness shielding as a mandatory test item. In order to better complete the electromagnetic shielding test, a large number of accessories need to be produced and stored, which increases the testing cost. To this end, we provide a high-voltage connection system electromagnetic shielding box to solve the above problems. To this end, we provide a high-voltage connection system electromagnetic shielding box to solve the above problems. Utility Model Content

[0004] (1) Technical problems solved

[0005] The purpose of the present invention is to provide an electromagnetic shielding box for a high-voltage connection system in order to solve the above problems, so as to solve the problem in the prior art that a large number of accessories need to be produced and stored, which increases the detection cost.

[0006] (2) Technical solution

[0007] The utility model is achieved through the following technical solutions: an electromagnetic shielding box for a high-voltage connection system.

[0008] It includes a resistor side shielding box and a receiving end shielding box. The outside of the resistor side shielding box is provided with a high-voltage connector and a shielding cover. The surface of the resistor side shielding box is provided with a connecting plate. The surface of the receiving end shielding box is fixedly connected with a radio frequency connector.

[0009] Preferably, handles are fixedly connected to the surfaces of the resistor side shielding box and the receiving end shielding box. The materials of the resistor side shielding box and the receiving end shielding box are both aluminum alloy materials. The handles make it easy to take the shielding boxes, and the entire metal bottom of the resistor side shielding box and the receiving end shielding box is in contact with the grounding plate.

[0010] Preferably, a card slot is opened inside the resistor side shielding box, and a sliding card ring is fixedly connected to the surface of the high-voltage connector, and the sliding card ring is slidably connected to the card slot. Through the card slot and the sliding card ring, the connection between the high-voltage connector and the resistor side shielding box is staggered and blocked, thereby improving the electromagnetic shielding ability of the shielding box.

[0011] Preferably, the tops of the resistor side shielding box and the receiving end shielding box are fixedly connected with fixing rings, and the shielding cover and the connecting plate are slidingly connected to the two fixing rings respectively. The shielding cover and the connecting plate are fixed by the fixing rings, and the shielding cover is connected to the top of the receiving end shielding box, and the connecting plate is fixed to the surface of the resistor side shielding box.

[0012] Preferably, the surfaces of the shielding cover plate and the connecting plate are fixedly connected with a sliding block, an arc-shaped groove is opened inside the fixed ring, and the sliding block is slidably connected to the arc-shaped groove. The sliding block is fixed through the arc-shaped groove, and then the shielding cover plate or the connecting plate is fixed inside the fixed ring, thereby improving the shielding performance of the shielding box.

[0013] Preferably, the internal sliding connection of the fixing ring is connected to a limiting buckle, and the top of the limiting buckle is engaged with the sliding block, and the sliding block is fixed by the limiting buckle, thereby limiting the shielding cover or the connecting plate.

[0014] Preferably, a telescopic spring is fixedly connected to the interior of the limit buckle, and the bottom end of the telescopic spring is fixedly connected to the fixing ring. The telescopic spring provides an upward thrust to the limit buckle, making the connection between the limit buckle and the sliding block more stable and firm.

[0015] Preferably, a terminal gland is provided on the outside of the connecting plate, and the terminal gland is fastened to the connecting plate by bolts. When the cable is a high-voltage power supply cable for a car, the insulation layers at both ends and the middle are stripped off to expose the shielding layer which is directly connected to the terminal gland tooling, making installation quick and easy.

[0016] The utility model provides an electromagnetic shielding box for a high-voltage connection system, which has the following beneficial effects:

[0017] This high-voltage connection system electromagnetic shielding box consists of a resistor-side shielding box and a receiver-side shielding box. The resistor-side shielding box is used to house a 50Ω matching resistor, while the receiver-side shielding box is used to connect to the signal source output. The shielding box is designed to embed an RF connector on one end, conveniently connecting to the signal source output or 50Ω matching resistor, while the other end houses the high-voltage connector and shielding layer of the high-voltage connection system. This box essentially meets all vehicle manufacturer high-voltage connection system testing requirements and is used to evaluate the shielding performance of high-voltage wiring harnesses and connectors, ensuring effective control of electromagnetic interference and improving electromagnetic shielding testing results.

[0018] The electromagnetic shielding box of the high-voltage connection system receives the output signal through the radio frequency connector, and seals the receiving end shielding box through the shielding cover to improve the electromagnetic shielding test effect. The handle makes it easy to take the shielding box, and the entire metal bottom of the resistor side shielding box and the receiving end shielding box is in contact with the grounding plate to ensure good grounding. The connection between the high-voltage connector and the resistor side shielding box is staggered and blocked through the slot and sliding clamp ring to improve the electromagnetic shielding ability of the shielding box. The shielding cover and the connecting plate are fixed through the fixing ring, the shielding cover is connected to the top of the receiving end shielding box, and the connecting plate is fixed to the surface of the resistor side shielding box.

[0019] The electromagnetic shielding box of the high-voltage connection system fixes the sliding block through the arc-shaped slide groove, and then fixes the shielding cover or connecting plate inside the fixing ring, thereby improving the shielding performance of the shielding box; the sliding block is fixed through the limit buckle, thereby limiting the shielding cover or connecting plate; the limit buckle is provided with an upward thrust through the telescopic spring, making the connection between the limit buckle and the sliding block more stable and firm; the terminal gland is convenient for installing and fixing various types of terminal glands, thereby meeting the requirements for clamping the shielding layers of various cables; when the cable is a high-voltage power supply cable for an automobile, the insulation layers at both ends and in the middle are stripped off to expose the shielding layer, which is directly connected to the terminal gland tooling, making installation convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the explosion structure of the resistor side shielding box of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the shielding box at the receiving end of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the connecting plate of the utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the arc-shaped chute of the utility model;

[0024] Figure 5 For this utility model Figure 4 Schematic diagram of the structure at A in the middle;

[0025] Figure 6 This is a schematic diagram of the electromagnetic shielding effectiveness test of the high-voltage connection system;

[0026] Figure 7 This is a test wiring diagram of the connector of the utility model;

[0027] Figure 8 This is a wiring diagram for pure wire testing of the utility model.

[0028]

Main component symbol description

[0029] 1. Resistor side shielding box; 2. Receiver side shielding box; 3. RF connector; 4. High voltage connector; 5. Card slot; 6. Sliding clamp; 7. Fixing ring; 8. Shielding cover; 9. Arc-shaped slide; 10. Sliding clamp; 11. Limiting buckle; 12. Telescopic spring; 13. Connecting plate; 14. Terminal gland; 15. Handle. DETAILED DESCRIPTION

[0030] An embodiment of the utility model provides an electromagnetic shielding box for a high-voltage connection system.

[0031] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , including a resistor side shielding box 1 and a receiving end shielding box 2. The outside of the resistor side shielding box 1 is provided with a high-voltage connector 4 and a shielding cover 8. The high-voltage connector 4 is used to conveniently connect the signal source output or the 50Ω matching resistor. The shielding cover 8 is used to seal the resistor side shielding box 1 to improve the electromagnetic shielding test effect.

[0032] A terminal gland 14 is provided on the outside of the connecting plate 13, and the terminal gland 14 is fastened to the connecting plate 13 by bolts. Through the terminal gland 14, it is convenient to install and fix various types of terminal glands 14, thereby meeting the clamping requirements of various cable shielding layers. When the cable is a high-voltage power supply cable for a car, the insulation layer at both ends and the middle is stripped off to expose the shielding layer, which is directly connected to the terminal gland 14 tooling, and the installation is convenient and quick.

[0033] A card slot 5 is provided inside the resistor side shielding box 1, and a sliding card ring 6 is fixedly connected to the surface of the high-voltage connector 4, and the sliding card ring 6 is slidably connected to the card slot 5. Through the card slot 5 and the sliding card ring 6, the connection between the high-voltage connector 4 and the resistor side shielding box 1 is staggered and blocked, thereby improving the electromagnetic shielding ability of the shielding box.

[0034] The surface of the receiving end shielding box 2 is fixedly connected to the RF connector 3. The RF connector 3 and the connecting plate 13 are installed on the surface of the receiving end shielding box 2. The connecting plate 13 is fixed on the end of the receiving end shielding box 2 away from the RF connector 3. The output signal is received through the RF connector 3. The pure cable is conveniently connected through the connecting plate 13. The high-voltage system is conveniently tested through the resistor side shielding box 1.

[0035] The top of the resistor side shielding box 1 and the receiving end shielding box 2 can be fixed with the shielding cover 8 or the connecting plate 13 through the fixing ring 7. The connection method of the fixed shielding cover 8 and the connecting plate 13 and the fixing ring 7 is the same. The fixed shielding cover 8 is used when testing the connector, and the connecting plate 13 is used when testing the pure line. The fixed shielding cover 8 and the connecting plate 13 can be replaced according to the test needs and can be used interchangeably during use.

[0036] The top ends of the resistor side shielding box 1 and the receiving end shielding box 2 are fixedly connected with a fixing ring 7, and the shielding cover 8 and the connecting plate 13 are slidingly connected to the two fixing rings 7 respectively. The shielding cover 8 and the connecting plate 13 are fixed by the fixing ring 7, and the shielding cover 8 is connected to the top end of the resistor side shielding box 1, and the connecting plate 13 is fixed to the surface of the receiving end shielding box 2.

[0037] The surfaces of the shielding cover 8 and the connecting plate 13 are fixedly connected with a sliding block 10. An arc-shaped groove 9 is provided inside the fixed ring 7, and the sliding block 10 is slidingly connected to the arc-shaped groove 9. The sliding block 10 is fixed through the arc-shaped groove 9, and then the shielding cover 8 or the connecting plate 13 is fixed inside the fixed ring 7, thereby improving the shielding performance of the shielding box.

[0038] The internal sliding connection of the fixing ring 7 is connected to the limiting buckle 11, and the top of the limiting buckle 11 is engaged with the sliding block 10. The sliding block 10 is fixed by the limiting buckle 11, thereby limiting the shielding cover 8 or the connecting plate 13.

[0039] A telescopic spring 12 is fixedly connected to the interior of the limit buckle 11, and the bottom end of the telescopic spring 12 is fixedly connected to the fixing ring 7. The telescopic spring 12 provides an upward thrust to the limit buckle 11, making the connection between the limit buckle 11 and the sliding block 10 more stable and firm.

[0040] A handle 15 is fixedly connected to the surface of the resistor side shielding box 1 and the receiving end shielding box 2. The materials of the resistor side shielding box 1 and the receiving end shielding box 2 are both aluminum alloy materials. The handle 15 makes it easy to take the shielding box, and the entire metal bottom of the resistor side shielding box 1 and the receiving end shielding box 2 is in contact with the grounding plate to ensure good grounding.

[0041] This application uses one of the electromagnetic shielding effectiveness test methods for high-voltage connection systems - the current clamp method. This method is derived from the national standard "GB / T 37133-2018, Technical Requirements for High-Voltage and High-Current Wiring Harnesses and Connectors for Electric Vehicles". This test device is designed to implement the current clamp method, one of the high-voltage system test methods. This test device is manufactured in accordance with national standards and industry requirements and can meet the requirements for test equipment in the standards. This method is an existing technology, and this application only improves the shielding equipment during the test process of this method.

[0042] When the present invention is in use: the shielding box is composed of two shielding boxes: a resistor side shielding box 1 and a receiving end shielding box 2. The resistor side shielding box 1 is used for installing a 50Ω matching resistor internally, and the receiving end shielding box 2 is used to connect the signal source output, which basically meets the test of all high-voltage connection systems of car manufacturers. There are handles 15 at both ends for easy picking up. The whole piece of metal at the bottom is in contact with the grounding plate to ensure good grounding. For pure cables, it is equipped with a terminal gland 14 clamping tool to meet the clamping of various cable shielding layers nowadays. When the cable is a high-voltage power supply cable for a car, the insulation layer at both ends and the middle is stripped off to expose the shielding layer and directly connect it to the tooling. The installation is convenient and quick. For test cables and high-voltage cable systems, it is only necessary to customize the replacement interface board and replace different terminal glands 14 to achieve diversified product testing. Only the replacement interface board needs to be customized each time, which saves finished products and is simple to arrange.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic shielding box for a high-voltage connection system, comprising a resistor-side shielding box (1) and a receiving-end shielding box (2), characterized in that: A high-voltage connector (4) and a shielding cover (8) are provided on the outside of the resistor-side shielding box (1), a connecting plate (13) is provided on the surface of the resistor-side shielding box (1), and a radio frequency connector (3) is fixedly connected to the surface of the receiving-end shielding box (2).

2. The electromagnetic shielding box of a high-voltage connection system according to claim 1, characterized in that: Handles (15) are fixedly connected to the surfaces of the resistor-side shielding box (1) and the receiving-end shielding box (2), and the materials of the resistor-side shielding box (1) and the receiving-end shielding box (2) are both aluminum alloy materials.

3. The electromagnetic shielding box of a high-voltage connection system according to claim 1, characterized in that: A card slot (5) is provided inside the resistor-side shielding box (1), a sliding card ring (6) is fixedly connected to the surface of the high-voltage connector (4), and the sliding card ring (6) is slidably connected to the card slot (5).

4. The electromagnetic shielding box of a high-voltage connection system according to claim 1, characterized in that: The top ends of the resistor-side shielding box (1) and the receiving-end shielding box (2) are both fixedly connected to fixing rings (7), and the shielding cover (8) and the connecting plate (13) are respectively slidably connected to the two fixing rings (7).

5. The electromagnetic shielding box of a high-voltage connection system according to claim 4, characterized in that: The surfaces of the shielding cover plate (8) and the connecting plate (13) are fixedly connected with a sliding block (10), an arc-shaped sliding groove (9) is provided inside the fixing ring (7), and the sliding block (10) is slidably connected to the arc-shaped sliding groove (9).

6. The electromagnetic shielding box of a high-voltage connection system according to claim 5, characterized in that: The interior of the fixing ring (7) is slidably connected to a limit buckle (11), and the top end of the limit buckle (11) is engaged with the sliding block (10).

7. The electromagnetic shielding box of a high-voltage connection system according to claim 6, characterized in that: A telescopic spring (12) is fixedly connected to the interior of the limiting buckle (11), and the bottom end of the telescopic spring (12) is fixedly connected to the fixing ring (7).

8. The electromagnetic shielding box of a high-voltage connection system according to claim 1, characterized in that: A terminal gland (14) is provided on the outside of the connecting plate (13), and the terminal gland (14) is fastened to the connecting plate (13) via bolts.

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