An anti-interference, waterproof, and heat-resistant wiring harness R&D test system

Abstract

The present invention discloses an anti-interference, waterproof and heat-resistant wire harness research and development test system, which belongs to the field of wire harness testing technology, including a main box body and a wire harness main body arranged inside the main box body through a wire harness fixing assembly, a heating rod is provided on the lower side of the internal space of the main box body, and a plurality of equidistantly distributed heat conducting plates are provided on the outside of the heating rod, the main box body is filled with water, a box wall thread ring is provided on the inner wall of the main box body, the wire harness fixing assembly is threadedly connected to the box wall thread ring, the cover at the upper end of the main box body is provided with a box cover, a pressure gauge, a pressure relief assembly and an air pump are provided inside the box cover, the wire harness fixing assembly includes a connecting tube and a rubber deformable plug combined with the connecting tube, a connecting cover ring and a threaded top pressure block, the pressure relief assembly includes a sealing piece and a sealing sheet, a spring plate, a spring and a nut sleeved on the outside of the connecting tube, and the anti-interference, waterproof and heat-resistant wire harness research and development test system can create a high temperature and high pressure state to assist the wire harness test.

Description

Technical Field

[0001] The present invention belongs to the technical field of wire harness testing, and in particular relates to an anti-interference, waterproof and heat-resistant wire harness testing system for research and development. Background Art

[0002] Wiring harness testing examines the wiring components and insulation materials connecting various electrical devices in a circuit to identify potential problems. This typically involves measuring the wiring harness's continuity, insulation, withstand voltage, and resistance. Common wiring harness faults include poor contact between connectors, short circuits, breaks, missing connections, and overall insulation withstand voltage rating failures.

[0003] There are various working conditions in the use environment of wire harnesses, among which there are conditions where one or more negative conditions exist at the same time, such as conditions where water, high temperature, high pressure and electromagnetic interference exist at the same time. The existing test systems for wire harness research and development can usually only meet the test conditions under one of these conditions, and cannot better simulate the negative working conditions under the composite state, cannot better perform performance testing on the wire harness, and it is difficult to better obtain the ability of the wire harness to resist complex negative working conditions during use. Summary of the Invention

[0004] The object of the present invention is to provide an anti-interference, waterproof and heat-resistant wire harness testing system for research and development, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a test system for anti-interference, waterproof and heat-resistant wiring harness research and development, comprising a main box and a wiring harness body disposed therein via a wiring harness fixing assembly, a heating rod disposed on the lower side of the interior space of the main box, a plurality of equally spaced heat conducting plates disposed on the exterior of the heating rod, the interior of the main box being filled with water, a box wall thread ring disposed on the inner wall of the main box, the wiring harness fixing assembly being threadedly connected to the box wall thread ring, a box cover disposed on the upper end of the main box, and a pressure gauge, a pressure relief assembly and an air pump disposed within the box cover;

[0006] The wiring harness fixing assembly includes a connecting tube and a rubber deformable plug combined with the connecting tube, a connecting cover ring and a threaded top pressure block. The pressure relief assembly includes a sealing part and a sealing sheet, a spring plate, a spring and a nut sleeved on the outside of the pressure relief assembly. When the performance test of the wiring harness body is carried out, water is filled into the main box body to allow the water to fully infiltrate the outside of the wiring harness body, thereby realizing the negative working condition of the water test. The temperature of the outside of the wiring harness body is increased by heating the water with a heating rod, thereby realizing the negative working condition under high temperature state. The main box body is inflated and pressurized by an air pump to increase the water pressure to the outside of the wiring harness body, thereby realizing the negative working condition under high pressure state. The performance test of the wiring harness body is carried out under the repeated action of complex working conditions in water, high temperature and high pressure, which can better realize the ability of the wiring harness body to resist negative working conditions under complex conditions, thereby obtaining more accurate performance data of the wiring harness body.

[0007] Preferably, the box cover is fixed to the main box body by cover screws in its edge, and the cover screws are screwed into threaded holes on the upper end surface of the main box body. A sealing frame is provided between the contact portion of the main box body and the box cover.

[0008] Preferably, a rubber deformation plug and a threaded top pressure block are provided inside the connecting tube, and a connecting cover ring is provided outside the connecting tube.

[0009] Preferably, an opening is provided on the edge of the disk-shaped portion of the connecting tube, and a sealing ring is provided inside the opening of the disk-shaped edge of the connecting tube.

[0010] Preferably, the connecting cover ring is sleeved on the outside of the disc-shaped portion on the outer circle of the connecting cylinder, and the connecting cover ring is fixed to the threaded portion of the outer circle of the threaded ring of the box wall.

[0011] Preferably, the end of the rubber deformable plug facing away from the threaded top pressure block is conical, the threads on the outer circle of the threaded top pressure block are engaged with the threads on the inner wall of the connecting tube, a conical cavity is provided in the connecting tube, and the conical cavity inside the connecting tube corresponds to the conical part of the rubber deformable plug, and the outer side of the end of the threaded top pressure block facing away from the rubber deformable plug is hexagonal, and the wiring harness fixing assembly completes the closure of the external space of the wiring harness main body by twisting the threaded top pressure block to compress the rubber deformable plug to deform inside the connecting tube. This kind of closure method can relatively well completely seal the outside of the wiring harness main body, and the operation of connecting the wiring harness fixing assembly to the wiring harness main body can be completed outside the main box. After the connection between the wiring harness fixing assembly and the wiring harness main body is completed, the wiring harness main body is set inside the main box and fixed by the connecting cover ring, avoiding the problem of limited operating space inside the main box.

[0012] Preferably, the block-shaped part and the disc-shaped part of the sealing piece are provided with air holes distributed in a circular array, and the sealing piece, spring plate, spring and nut are sleeved on the outside of the rod-shaped part of the sealing piece. When the main box body is pressurized by the air pump, the pressure relief component plays a role in limiting the internal pressure. When the pressure inside the main box body exceeds the set value, the gas will push the sealing piece and the spring plate upward and be discharged from the air holes inside the sealing piece, thereby avoiding damage to the equipment installed inside the main box body due to high pressure, protecting the internal components, and controlling environmental variables.

[0013] Preferably, the block portion of the blocking member is located inside the box cover and is threadedly connected thereto.

[0014] Preferably, the nut is threadedly connected to the rod-shaped portion of the blocking piece, one end of the spring presses against the nut, and the other end of the spring presses against the spring plate and presses the sealing sheet toward the block-shaped portion of the blocking piece.

[0015] Preferably, the portions of the connecting cylinder, the rubber deformable plug and the threaded pressing block that are in contact with the wiring harness body all correspond to their outer diameters.

[0016] Technical effects and advantages of the present invention:

[0017] This anti-interference, waterproof, and heat-resistant wire harness R&D testing system fills the main box with water during performance testing of the wire harness body, allowing the water to fully soak the outside of the wire harness body, thereby achieving a negative working condition for underwater testing. The water is heated by a heating rod to increase the temperature outside the wire harness body, thereby achieving a negative working condition under a high-temperature state. An air pump is used to inflate the main box and increase the water pressure toward the outside of the wire harness body, thereby achieving a negative working condition under a high-pressure state. The performance of the wire harness body is tested under repeated conditions of water, high temperature, and high pressure, which can effectively demonstrate the wire harness body's ability to resist negative working conditions under complex conditions, thereby obtaining more accurate performance data for the wire harness body.

[0018] When the main box is pressurized by the air pump, the pressure relief component plays a role in limiting the internal pressure. When the pressure inside the main box exceeds the set value, the gas will push the sealing plate and the spring plate upward and discharge from the air holes inside the sealing member, thereby preventing the equipment installed inside the main box from being damaged due to high pressure, playing a role in protecting the internal components and controlling environmental variables.

[0019] The wiring harness fixing assembly completes the sealing of the external space of the wiring harness main body by twisting the threaded top pressure block to compress the rubber deformation plug to deform inside the connecting tube. This sealing method can completely seal the outside of the wiring harness main body relatively well, and the operation of connecting the wiring harness fixing assembly to the wiring harness main body can be completed outside the main box. After the connection between the wiring harness fixing assembly and the wiring harness main body is completed, the wiring harness main body is set inside the main box and fixed by the connecting cover ring, avoiding the problem of limited operating space inside the main box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the combined state structure of an embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of the wiring harness fixing assembly in an embodiment of the present invention;

[0022] Figure 3 This is a structural schematic diagram of a wire harness fixing assembly in a separated state facing the sealing ring according to an embodiment of the present invention;

[0023] Figure 4 This is a structural schematic diagram of a wire harness fixing assembly in a separated state facing the threaded top pressing block according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic structural diagram of a pressure relief assembly according to an embodiment of the present invention;

[0025] Figure 6 This is a structural schematic diagram of the pressure relief assembly in a separated state facing the blocking member according to an embodiment of the present invention.

[0026] In the figure: 1. Main box body; 101. Box wall thread ring; 2. Heating rod; 3. Heat conducting plate; 4. Wiring harness body; 5. Sealing frame; 6. Box cover; 7. Cover screw; 8. Pressure gauge; 100. Wiring harness fixing assembly; 9. Sealing ring; 10. Connecting cylinder; 11. Rubber deformation plug; 12. Connecting cover ring; 13. Threaded top pressure block; 200. Pressure relief assembly; 14. Sealing piece; 15. Sealing sheet; 16. Spring plate; 17. Spring; 18. Nut; 300. Air pump. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Please refer to Figures 1-6The test system for anti-interference, waterproof and heat-resistant wire harness R&D shown in the figure includes a main box 1 and a wire harness body 4 arranged inside the main box 1 through a wire harness fixing assembly 100. A heating rod 2 is provided on the lower side of the internal space of the main box 1. A plurality of evenly distributed heat conducting plates 3 are provided on the outside of the heating rod 2 and are connected to the heating rod 2 by welding. The main box 1 is filled with water, and the filling medium can be a liquid medium with a higher boiling point such as thermal oil. A box wall thread ring 101 is provided on the inner wall of the main box 1. The box wall thread ring 101 is an integrated structure prefabricated on the inner wall of the main box 1. The wire harness fixing assembly 100 Threadedly connected to the box wall thread ring 101, the cover at the upper end of the main box body 1 is provided with a box cover 6, a portion of the box cover 6 invades the interior of the main box body 1 to increase the structural strength of the connection, and a pressure gauge 8, a pressure relief assembly 200 and an air pump 300 are provided inside the box cover 6. The specific structures of the pressure gauge 8 and the air pump 300 are prior art and are not described here. The box cover 6 is fixed to the main box body 1 by a cover screw 7 inside its edge, and the cover screw 7 is screwed into the threaded hole on the upper end surface of the main box body 1. A sealing frame 5 is provided between the contact part of the main box body 1 and the box cover 6 to prevent gas from overflowing from between the main box body 1 and the sealing frame 5;

[0029] refer to Figure 2 、 Figure 3 and Figure 4 , the wiring harness fixing assembly 100 includes a connecting cylinder 10 and a rubber deformable plug 11 combined therewith, the rubber deformable plug 11, a connecting cover ring 12 and a threaded top pressure block 13. The material of the rubber deformable plug 11 is preferably silicone rubber. The threaded top pressure block 13 pushes against the non-tapered end surface of the rubber deformable plug 11. The inside of the connecting cylinder 10 is provided with a rubber deformable plug 11 and a threaded top pressure block 13. The outside of the connecting cylinder 10 is provided with a connecting cover ring 12. The connecting cover ring 12 completes the connection between the wiring harness fixing assembly 100 and the main box body 1. The edge of the disk-shaped portion of the connecting cylinder 10 is provided with an opening. The inside of the opening of the disk-shaped edge of the connecting cylinder 10 is provided with a sealing ring 9. The sealing ring 9 prevents water from seeping out of the joint gap between the connecting cylinder 10 and the main box body 1. The connecting cover ring 12 is sleeved on the outside of the disk-shaped portion on the outer circle of the connecting cylinder 10, and the connecting cover ring 12 is fixed to the threaded portion of the outer circle of the threaded ring 101 on the box wall.

[0030] The end of the rubber deformable plug 11 facing away from the threaded pressing block 13 is tapered, and the rubber deformable plug 11 completes the closure of the external space of the wiring harness body 4. The threads on the outer circle of the threaded pressing block 13 are engaged with the threads on the inner wall of the connecting cylinder 10. A tapered cavity is provided inside the connecting cylinder 10, and the tapered cavity inside the connecting cylinder 10 corresponds to the tapered part of the rubber deformable plug 11. The outer side of the end of the threaded pressing block 13 facing away from the rubber deformable plug 11 is hexagonal, and this contour is beneficial to the operation of an open-end wrench.

[0031] refer to Figure 5 and Figure 6The pressure relief assembly 200 includes a blocking member 14 and a sealing sheet 15, a spring plate 16, a spring 17, and a nut 18 sleeved on the outside of the blocking member 14. The block-shaped and disc-shaped portions of the blocking member 14 are internally provided with an annular array of air holes for passing gas released from the blocking member 14. The sealing sheet 15, the spring plate 16, the spring 17, and the nut 18 are sleeved on the rod-shaped portion of the blocking member 14. The spring 17 is used to provide pressure for the spring plate 16 to press against the blocking member 14. The sealing sheet 15 optimizes the effect of the spring plate 16 in sealing the air holes. The nut 18 adjusts the preload of the spring 17 to change the pressure acting on the spring plate 16.

[0032] The block-shaped part of the sealing member 14 is located inside the box cover 6 and is threadedly connected to it. The nut 18 is threadedly connected to the rod-shaped part of the sealing member 14. One end of the spring 17 pushes against the nut 18, and the other end of the spring 17 pushes against the spring plate 16 and presses the sealing piece 15 against the block-shaped part of the sealing member 14. The parts of the connecting tube 10, the rubber deformable plug 11 and the threaded top pressure block 13 that are in contact with the wiring harness body 4 all correspond to their outer diameters. The diameters of the contact parts of the connecting tube 10, the rubber deformable plug 11 and the threaded top pressure block 13 and the wiring harness body 4 can be customized as needed.

[0033] When using this anti-interference, waterproof and heat-resistant wire harness R&D test system, first insert the two ends of the wire harness body 4 into the connecting cylinder 10, the rubber deformable plug 11 and the threaded pressing block 13 inside the wire harness fixing assembly 100. Use a wrench to turn the threaded pressing block 13 inside the connecting cylinder 10, and the threaded pressing block 13 presses the rubber deformable plug 11 tightly against the outer surface of the wire harness body 4, thereby completing the connection between the wire harness fixing assembly 100 and the wire harness body 4.

[0034] Pass both ends of the harness body 4 of the harness fixing assembly 100 through the through holes in the middle of both ends of the main box 1, place the connecting cylinder 10 inside the box wall thread ring 101, and screw the connecting cover ring 12 onto the outside of the box wall thread ring 101 to complete the fixing of the harness fixing assembly 100;

[0035] Fill the main box 1 with water as a heat-conducting and pressure medium, place the box cover 6 on top of the main box 1 and lock it with the cover screws 7. Use the air pump 300 to input air into the main box 1 to increase the pressure. The pressure can be fed back through the reading of the pressure gauge 8. The upper limit of the pressure value is set by the pressure relief component 200. The degree of tightening of the nut 18 determines the pre-compression state of the spring 17. The force of the spring 17 pressing against the spring plate 16 is determined by the tightening degree of the nut 18. If the gas pressure inside the main box 1 exceeds the set value, the sealing piece 15 and the spring plate 16 will be pushed open through the air holes in the block portion of the blocking member 14, and the gas will be released to complete the pressure relief.

[0036] The water inside the main box 1 will enter the bottom of its internal space and come into contact with the heating rod 2 and the heat conducting plate 3 outside the heating rod 2. When the heating rod 2 is powered on, it will heat the water inside the main box 1. The heat conducting plate 3 accelerates the speed of water heating. The water level inside the main box 1 is determined as needed to simulate a water vapor environment or a water immersion environment.

[0037] The above is only a preferred specific embodiment of the invention, but the scope of protection of the invention is not limited to this. Any technician familiar with this technical field can make equivalent substitutions or changes within the technical scope disclosed by the invention based on the technical solution and inventive concept of the invention, which should be covered by the scope of protection of the invention.

Claims

1. A test system for anti-interference, waterproof and heat-resistant wire harness R&D, comprising a main box (1) and a wire harness body (4) disposed inside the main box via a wire harness fixing assembly (100), characterized in that: A heating rod (2) is provided on the lower side of the internal space of the main box (1), and a plurality of heat conducting plates (3) are provided on the outside of the heating rod (2) at equal intervals. The main box (1) is filled with water. A box wall thread ring (101) is provided on the inner wall of the main box (1), and the wiring harness fixing assembly (100) is threadedly connected to the box wall thread ring (101). A box cover (6) is provided on the upper end of the main box (1), and a pressure gauge (8), a pressure relief assembly (200) and an air pump (300) are provided inside the box cover (6). The wiring harness fixing assembly (100) comprises a connecting cylinder (10) and a rubber deformable plug (11) combined therewith, a connecting cover ring (12) and a threaded top pressure block (13); the pressure relief assembly (200) comprises a sealing member (14) and a sealing sheet (15) sleeved on the outside thereof, a spring plate (16), a spring (17) and a nut (18); The connecting tube (10) is provided with a rubber deformation plug (11) and a threaded top pressure block (13) inside, and a connecting cover ring (12) outside the connecting tube (10); An opening is provided on the edge of the disk-shaped portion of the connecting tube (10), and a sealing ring (9) is provided inside the opening of the disk-shaped edge of the connecting tube (10); The connecting cover ring (12) is sleeved on the outside of the disc-shaped portion on the outer circumference of the connecting cylinder (10), and the connecting cover ring (12) is fixed to the threaded portion of the outer circumference of the box wall thread ring (101); The end of the rubber deformable plug (11) facing away from the threaded pressing block (13) is tapered, the threads on the outer circle of the threaded pressing block (13) are engaged with the threads on the inner wall of the connecting cylinder (10), a tapered cavity is provided inside the connecting cylinder (10), the tapered cavity inside the connecting cylinder (10) corresponds to the tapered portion of the rubber deformable plug (11), and the outer side of the end of the threaded pressing block (13) facing away from the rubber deformable plug (11) is hexagonal.

2. The anti-interference, waterproof and heat-resistant wire harness R&D test system according to claim 1, characterized in that: The box cover (6) is fixed to the main box body (1) via cover screws (7) within its edge, and the cover screws (7) are screwed into threaded holes on the upper end surface of the main box body (1). A sealing frame (5) is provided between the contact portions of the main box body (1) and the box cover (6).

3. The anti-interference, waterproof and heat-resistant wire harness R&D testing system according to claim 1, characterized in that: The block-shaped part and the disc-shaped part of the blocking piece (14) are provided with air holes distributed in an annular array, and the sealing sheet (15), the spring plate (16), the spring (17) and the nut (18) are sleeved outside the rod-shaped part of the blocking piece (14).

4. The anti-interference, waterproof and heat-resistant wire harness R&D testing system according to claim 3, characterized in that: The block-shaped portion of the blocking member (14) is located inside the box cover (6) and is threadedly connected thereto.

5. The anti-interference, waterproof and heat-resistant wire harness R&D test system according to claim 4, characterized in that: The nut (18) is threadedly connected to the rod-shaped portion of the blocking member (14), one end of the spring (17) pushes against the nut (18), and the other end of the spring (17) pushes against the spring plate (16) and presses the sealing sheet (15) against the block-shaped portion of the blocking member (14).

6. The anti-interference, waterproof and heat-resistant wire harness R&D testing system according to claim 1, characterized in that: The portions of the connecting cylinder (10), the rubber deformable plug (11) and the threaded top pressing block (13) that are in contact with the wiring harness body (4) all correspond to their outer diameters.

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