Butt joint tool for testing shielding effectiveness of high-voltage wire harness based on wire injection method
By introducing anti-interference and fixed spacing adjustment mechanisms into the high-voltage wire harness shielding effectiveness testing docking fixture, the problems of insufficient versatility and weak anti-interference ability of existing fixtures are solved. Stable fixing and vibration cancellation of various specifications of wire harnesses for new energy vehicles are achieved, ensuring the stability and safety of the test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SANYI TESTING TECH CO LTD
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-17
AI Technical Summary
The existing high-voltage wire harness shielding effectiveness testing docking fixtures lack versatility, cannot be compatible with various specifications of high-voltage wire harnesses commonly used in new energy vehicles, and have weak anti-interference capabilities, resulting in frequent replacement of fixture components and fluctuations in signal injection intensity during the testing process.
A docking fixture including an anti-interference mechanism and a fixed spacing adjustment mechanism was designed. Through the combination of magnets and buffer springs, it can achieve stable fixation and vibration buffering of wire harnesses of different specifications, adapt to various wire diameters of 5-50mm, and prevent the coupling spacing between the wire injection probe and the wire harness from shifting.
It achieves stable fixation and vibration cancellation for various wire diameters, avoids signal injection intensity fluctuations, is compatible with various specifications of high-voltage wiring harnesses for new energy vehicles, eliminates the need for frequent replacement of tooling components, and ensures the stability and safety of testing.
Smart Images
Figure CN224137342U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of docking tooling technology, specifically a docking tooling for testing the shielding effectiveness of high-voltage wire harnesses based on the wire injection method. Background Technology
[0002] The high-voltage wire harness shielding effectiveness testing docking fixture based on the line injection method is a key device specifically designed for non-contact electromagnetic coupling testing. It mainly consists of a high-precision line injection probe (CIP), a low-impedance grounding adapter for the shielding layer, a high-voltage resistant insulation structure, and a quick-positioning fixture. This fixture injects a high-frequency test signal (1MHz~1GHz) into the high-voltage wire harness shielding layer through magnetic ring coupling and measures the signal leakage in real time. It can accurately evaluate the shielding effectiveness (SE) without damaging the wire harness insulation. It adopts a split withstand voltage design (≥3000V), supports live testing, and ensures operational safety. Its wide-band response characteristics fully cover the frequency bands required by standards such as CISPR25, and the measurement error is controlled within ±1dB.
[0003] Existing high-voltage wire harness shielding effectiveness testing docking fixtures based on the wire injection method lack versatility. Due to their rigid clamp structure, they can only accommodate a limited range of wire diameters (e.g., 10-20mm), failing to be compatible with the various specifications of high-voltage wire harnesses commonly found in new energy vehicles, ranging from 5-50mm. This necessitates frequent replacement of fixture components when testing different wire harnesses. Furthermore, existing high-voltage wire harness shielding effectiveness testing docking fixtures based on the wire injection method have weak anti-interference capabilities and lack integrated effective vibration damping and anti-shake mechanisms. When mechanical vibrations occur in the testing environment, such as during production line equipment operation or vehicle vibration, the coupling distance between the wire injection probe and the wire harness may shift, leading to fluctuations in signal injection intensity. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content
[0004] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the line injection method, comprising a base, two first positive magnets fixedly connected to the inner wall of the base, a friction damping rod fixedly connected between the inner sides of the two first positive magnets, a lower positioning plate disposed above the base, mounting brackets fixedly connected to both sides of the lower positioning plate, and a connecting plate slidably connected to the inner wall of the mounting bracket. Through an anti-interference mechanism, wire harnesses of different specifications can be fixed, adapting to a variety of wire diameter ranges and compatible with high-voltage wire harnesses of various specifications from 5-50mm commonly used in new energy vehicles. This eliminates the need for frequent replacement of fixture components when testing different wire harnesses. Through the anti-interference mechanism, when mechanical vibrations occur in the testing environment, such as during production line equipment operation or vehicle vibration, the vibration can be effectively buffered and offset, preventing the coupling distance between the line injection probe and the wire harness from shifting, thereby causing fluctuations in signal injection intensity.
[0006] Preferably, two movable seats are slidably connected to the outer side of the friction damping rod, and a second positive magnet is fixedly connected to one side of the movable seat. The vibration is buffered by the repulsive force generated by the first positive magnet and the second positive magnet approaching each other.
[0007] Preferably, a buffer spring is fixedly connected to one side of the first positive magnet, and the buffer springs are evenly distributed. One end of the buffer spring is fixedly connected to the movable seat, and the vibration is buffered by the deformation of the buffer spring.
[0008] Preferably, a connecting frame is rotatably connected to the inner side of the movable seat, and the connecting frame is rotatably connected to the lower positioning plate.
[0009] Preferably, one side of the connecting plate passes through the mounting frame and extends to the outside of the mounting frame, and an upper positioning plate is fixedly connected to one side of the connecting plate, so that the wire harness is fixed by the cooperation of the upper positioning plate and the lower positioning plate.
[0010] Preferably, a lifting rod is slidably connected to the inner wall of the mounting bracket, and an arc-shaped groove is formed on one side of the lifting rod.
[0011] Preferably, four compression springs are fixedly connected to the top of the connecting plate, and the top of the compression springs are fixedly connected to the mounting bracket. The compression springs apply pressure to the connecting plate, so that the upper positioning plate and the lower positioning plate cooperate to fix the wire harness.
[0012] Preferably, a threaded sleeve is fixedly connected to one side of the mounting bracket, and a spherical extrusion rod is threaded to the inner side of the threaded sleeve. One end of the spherical extrusion rod contacts the arc-shaped groove, and the arc-shaped groove is extruded by the spherical extrusion rod to fix the lifting rod.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. This docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the line injection method, through an anti-interference mechanism, can effectively buffer and cancel vibrations when there are mechanical vibrations in the test environment, such as the operation of production line equipment or vehicle vibration conditions, to prevent the coupling distance between the line injection probe and the wire harness from shifting, thereby causing fluctuations in signal injection intensity.
[0015] 2. This docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the wire injection method can fix wire harnesses of different specifications through a fixed spacing adjustment mechanism. It can adapt to a variety of wire diameters and is compatible with high-voltage wire harnesses of various specifications from 5 to 50 mm commonly used in new energy vehicles. It eliminates the need to frequently change fixture components when testing different wire harnesses. Attached Figure Description
[0016] Figure 1 This is a front-view three-dimensional structural schematic diagram of a docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the line injection method proposed in this utility model.
[0017] Figure 2 This is a right-view three-dimensional structural diagram of a docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the line injection method proposed in this utility model.
[0018] Figure 3 This is a schematic diagram of the main cross-sectional structure of a docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the line injection method proposed in this utility model.
[0019] Figure 4 This invention proposes a docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the line injection method. Figure 3 Enlarged schematic diagram of the structure at point A in the middle;
[0020] In the diagram: 100, base; 110, first positive magnet; 120, friction damping rod; 130, movable seat; 140, second positive magnet; 150, buffer spring; 160, connecting frame; 200, lower positioning plate; 210, mounting frame; 220, connecting plate; 230, upper positioning plate; 240, lifting rod; 241, arc groove; 250, compression spring; 260, threaded sleeve; 261, spherical extrusion rod. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example 1: Please refer to again Figure 1-4 This utility model provides a docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the wire injection method. It includes a base 100, two first positive magnets 110 are fixedly connected to the inner wall of the base 100, a friction damping rod 120 is fixedly connected between the inner sides of the two first positive magnets 110, two movable seats 130 are slidably connected to the outer side of the friction damping rod 120, a second positive magnet 140 is fixedly connected to one side of the movable seat 130, a buffer spring 150 is fixedly connected to one side of the first positive magnet 110, and the buffer springs 150 are evenly distributed. One end of the buffer spring 150 is fixedly connected to the movable seat 130, and a connecting frame 160 is rotatably connected to the inner side of the movable seat 130. The connecting frame 160 is rotatably connected to the lower positioning plate 200.
[0023] Specifically, after vibration occurs, the lower positioning plate 200 applies pressure to the bottom connecting frame 160, causing the connecting frame 160 to rotate. This causes the movable seat 130 connected to the connecting frame 160 to move on the friction damping rod 120, generating damping force. Simultaneously, due to the movement of the movable seat 130, the second positive magnet 140 on the movable seat 130 moves closer to the first positive magnet 110, generating a repulsive force. This compresses the buffer spring 150, and together with the repulsive force generated by the first positive magnet 110 and the second positive magnet 140, buffers the vibration of the movable seat 130 and the friction damping rod 120.
[0024] Example 2: Please refer to again Figure 1-4 A lower positioning plate 200 is provided above the base 100. Mounting brackets 210 are fixedly connected to both sides of the lower positioning plate 200. A connecting plate 220 is slidably connected to the inner wall of the mounting bracket 210. One side of the connecting plate 220 passes through the mounting bracket 210 and extends to the outside of the mounting bracket 210. An upper positioning plate 230 is fixedly connected to one side of the connecting plate 220. A lifting rod 240 is slidably connected to the inner wall of the mounting bracket 210. An arc groove 241 is opened on one side of the lifting rod 240. Four compression springs 250 are fixedly connected to the top of the connecting plate 220. The top of the compression springs 250 is fixedly connected to the mounting bracket 210. A screw sleeve 260 is fixedly connected to one side of the mounting bracket 210. A spherical extrusion rod 261 is screwed into the inner side of the screw sleeve 260. One end of the spherical extrusion rod 261 is in contact with the arc groove 241.
[0025] Specifically, by rotating the spherical compression rod 261, the screw connection between the spherical compression rod 261 and the screw sleeve 260 is released, thereby releasing the compression limit of the lifting rod 240. Then, the lifting rod 240 can be pulled up, causing the lifting rod 240 to drive the connecting plate 220 to compress the compression spring 250, causing the upper positioning plate 230 connected to the connecting plate 220 to rise. Then, the wire harness is placed between the upper positioning plate 230 and the lower positioning plate 200. Then, the lifting rod 240 is released, causing the compressed compression spring 250 to reset and push the connecting plate 220 down, so that the upper positioning plate 230 cooperates with the lower positioning plate 200 to limit the wire harness. Then, the spherical compression rod 261 is rotated to compress and fix the lifting rod 240, thus completing the fixation of the wire harness.
[0026] Working principle: After vibration occurs, the lower positioning plate 200 applies pressure to the bottom connecting frame 160, causing the connecting frame 160 to rotate. This causes the movable seat 130 connected to the connecting frame 160 to move on the friction damping rod 120, generating damping force. At the same time, due to the movement of the movable seat 130, the second positive magnet 140 on the movable seat 130 moves closer to the first positive magnet 110, generating a repulsive force. This compresses the buffer spring 150. Combined with the repulsive force generated by the first positive magnet 110 and the second positive magnet 140, the vibration of the movable seat 130 and the friction damping rod 120 is buffered.
[0027] By rotating the spherical compression rod 261, the screw connection between the spherical compression rod 261 and the screw sleeve 260 is released, thereby releasing the compression limit of the lifting rod 240. Then, the lifting rod 240 can be pulled up, causing the connecting plate 220 to compress the compression spring 250, which in turn causes the upper positioning plate 230 connected to the connecting plate 220 to rise. The wire harness is then placed between the upper positioning plate 230 and the lower positioning plate 200. After that, the lifting rod 240 is released, causing the compressed compression spring 250 to reset and push the connecting plate 220 down, so that the upper positioning plate 230 cooperates with the lower positioning plate 200 to limit the wire harness. Finally, the spherical compression rod 261 is rotated to compress and fix the lifting rod 240, thus completing the fixation of the wire harness.
[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A docking tool for high-voltage wire harness shielding effectiveness test based on wire injection method, comprising a base (100), characterized in that, Two first positive pole magnets (110) are fixedly connected to the inner wall of the base (100), and a friction damping rod (120) is fixedly connected between the inner sides of the two first positive pole magnets (110). A lower positioning plate (200) is provided above the base (100), and mounting brackets (210) are fixedly connected to both sides of the lower positioning plate (200). A connecting plate (220) is slidably connected to the inner wall of the mounting bracket (210).
2. The docking tool for high voltage wire harness shielding effectiveness test based on wire injection method of claim 1, wherein, Two movable seats (130) are slidably connected to the outer side of the friction damping rod (120), and a second positive magnet (140) is fixedly connected to one side of the movable seat (130).
3. The interface tool for testing the shielding effectiveness of a high-voltage wire harness based on wire injection method according to claim 2, characterized in that, A buffer spring (150) is fixedly connected to one side of the first positive magnet (110), and the buffer springs (150) are evenly distributed. One end of the buffer spring (150) is fixedly connected to the movable seat (130).
4. The interface tool for testing the shielding effectiveness of a high-voltage wire harness based on wire injection method according to claim 3, characterized in that, The inner side of the movable seat (130) is rotatably connected to a connecting frame (160), and the connecting frame (160) is rotatably connected to the lower positioning plate (200).
5. The interface tool for testing the shielding effectiveness of a high-voltage wire harness based on wire injection method according to claim 1, wherein, One side of the connecting plate (220) passes through the mounting bracket (210) and extends to the outside of the mounting bracket (210), and an upper positioning plate (230) is fixedly connected to one side of the connecting plate (220).
6. The interface tool for testing the shielding effectiveness of a high-voltage wire harness based on wire injection method according to claim 5, wherein, The inner wall of the mounting bracket (210) is slidably connected to a lifting rod (240), and an arc-shaped groove (241) is opened on one side of the lifting rod (240).
7. The interface tool for testing the shielding effectiveness of a high-voltage wire harness based on wire injection method according to claim 6, characterized in that, Four compression springs (250) are fixedly connected to the top of the connecting plate (220), and the top of the compression springs (250) is fixedly connected to the mounting bracket (210).
8. The docking fixture for testing the shielding effectiveness of high-voltage wire harnesses based on the line injection method as described in claim 7, characterized in that, A screw sleeve (260) is fixedly connected to one side of the mounting bracket (210), and a spherical extrusion rod (261) is screwed to the inner side of the screw sleeve (260). One end of the spherical extrusion rod (261) is in contact with the arc groove (241).