Wire harness joint air tightness detection device and method

Abstract

The invention discloses a wire harness connector airtightness detection device and method, and relates to the technical field of new energy automobile wire harness airtightness detection, the wire harness connector airtightness detection device comprises a detection machine, a detection tube and a new energy automobile wire harness, the detection tube is fixedly connected to the detection machine, the new energy automobile wire harness is inserted in the detection tube, and the detection tube is provided with a detection assembly; through operation of the detection assembly and the function of forming an air bag through combination of the metal ring and the rubber ring, the rubber ring and the detection pipe are independently divided, the rubber ring can be detached from the sleeve to be replaced, when the rubber ring goes wrong, the whole detection pipe does not need to be detached, only the rubber ring in the sleeve needs to be independently replaced, and the tedious process of overall detachment is avoided; meanwhile, as the rubber ring can be replaced in time, it can be guaranteed that the rubber ring is always in a good sealing state, leakage misjudgment caused by poor sealing of the rubber ring is reduced, leakage source judgment during air tightness detection is more accurate, effective detection pressure can be stably formed, and the accuracy of a detection result is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection of wiring harnesses of new energy vehicles, and in particular to a device and method for detecting air tightness of wiring harness connectors. Background Art

[0002] The wiring harness of new energy vehicles is the core of the vehicle's electrical circuitry, connecting electronic components such as the engine, lights, and sensors. The wiring harness connector is a critical connection point. If the connector is not tightly sealed, the intrusion of moisture, dust, and other particles can cause poor contact, corrosion, and short circuits, impacting vehicle performance and driving safety. Therefore, airtightness testing equipment is required to proactively detect connector leaks and ensure reliable wiring harness operation. During testing using the existing technology, the wiring harness needs to be inserted into the testing tube body. An airbag is provided at the end of the tube body. The airbag and the wiring harness fit together to form a closed environment inside the testing tube body. During testing, the closed testing tube body is filled with gas of a set pressure and the pressure change is monitored. If the pressure drops beyond the range, a leak is determined. However, the existing devices have obvious defects: first, the airbag and the detection tube body are mostly integrated designs, and the airbag is easily damaged by aging due to extrusion, impact, and friction. When replacing, the tube body needs to be disassembled as a whole, which is cumbersome. If it is not replaced in time, the source of the leakage will be difficult to identify or effective detection pressure cannot be formed, affecting the accuracy of the results.

[0003] Secondly, the sealed wiring harness is fixed only by relying on the clamping force of the airbag, while the new energy wiring harness is thick in diameter and strong in rigidity. During testing, the thrust of high-pressure gas, its own weight and the vibration of external equipment can easily cause the wiring harness to shift. In the worst case, the sealing will fail and air will leak, and in the worst case, the wiring harness will fall off, causing the test to be interrupted and the results to be distorted.

[0004] To this end, a device and method for detecting air tightness of a wiring harness connector are proposed. Summary of the Invention

[0005] The object of the present invention is to provide a device and method for detecting the air tightness of a wiring harness connector, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device and method for detecting the air tightness of a wiring harness joint, comprising a detection machine, a detection tube, and a new energy vehicle wiring harness. The detection tube is fixedly connected to the detection machine, the new energy vehicle wiring harness is inserted into the detection tube, and a detection component is provided on the detection tube. The detection component includes a sleeve, which is sleeved on the new energy vehicle wiring harness. A semi-ring sleeve one and a semi-ring sleeve two are inserted on the side of the sleeve away from the detection tube. A micro air pump is fixedly connected to the top of the semi-ring sleeve one. A metal ring is commonly provided inside the semi-ring sleeve one and the semi-ring sleeve two. A rubber ring is fixedly connected to the inner ring surface of the metal ring, and two adhesive tapes are symmetrically provided on the outer wall of the semi-ring sleeve one.

[0007] Furthermore, a ring is fixedly connected to one end of the detection tube close to the sleeve, and four pressure rings are fixedly connected to the end of the ring away from the detection tube in a ring array. Two fixed plates are symmetrically fixedly connected to the outer wall of the detection tube, and each of the two fixed plates is slidably connected to a square rod. The two square rods are each fixedly connected to a pressure plate 1 at one end away from the detection tube, and a spring is provided on each of the two square rods. Two pressure plates are symmetrically fixedly connected to the outer wall of the sleeve, a groove block 1 is fixedly connected to the outer wall of the detection tube, and a groove block 2 is fixedly connected to the outer wall of the sleeve, and a pressure rod is inserted into the groove block 1.

[0008] Furthermore, the sleeve is configured to be open at both ends, and the inner wall of the sleeve at one end away from the detection tube is configured to be an inclined surface. The semi-ring sleeve one fits tightly with the semi-ring sleeve two, and when the semi-ring sleeve one and the semi-ring sleeve two fit together, a complete ring is formed.

[0009] Furthermore, the micro air pump is electrically connected to the detection machine, and a through hole is opened on the top of the semi-annular sleeve, which is connected to the air outlet end of the micro air pump.

[0010] Furthermore, the metal ring is configured to have a circular hole on the top, and the circular hole on the top of the metal ring is used to align and connect with the top through hole of the semi-ring sleeve 1. The metal ring and the rubber ring are combined into a hollow circular ring with an open top, and two adhesive tapes are attached to the two ends of the connection between the semi-ring sleeve 1 and the semi-ring sleeve 2. The adhesive tapes connect the semi-ring sleeve 1 and the semi-ring sleeve 2 through their own adhesion.

[0011] Furthermore, both ends of the sleeve and the pressure ring are set to be open, the outer wall of the end of the pressure ring away from the sleeve is set to a slope, and the slope of the pressure ring is squeezed and adapted to the slope of the sleeve, the inner surface of the pressure ring is set to rubber material, and the inner surface of the pressure ring is provided with an anti-slip texture, and the sleeve is plugged and adapted to the four pressure rings and the sleeve.

[0012] Furthermore, the two ends of the spring are fixedly connected to the pressure plate 1 and the side close to the fixed plate respectively, the two pressure plates 1 are respectively located on the moving paths of the two pressure plates 2, the slot block 2 is located at the end of the sleeve close to the detection tube, and the slot block 1 is located at the end of the detection tube close to the sleeve. Both ends of the pressure rod extend downward, and the end of the pressure rod away from the slot block 1 is plugged into and adapted to the slot block 2.

[0013] A method for detecting air tightness of a wiring harness connector comprises the following steps: Step 1: Threading and positioning: Pass the new energy vehicle wiring harness through the sleeve from one side of the half ring sleeve, and insert the wiring harness connector end into the detection tube.

[0014] Furthermore, step two: fix and clamp: push the sleeve toward the detection tube so that it is sleeved on the four pressure rings and the sleeve rings, and the four pressure rings clamp the new energy vehicle wiring harness; start the micro air pump to expand the airbag and squeeze the new energy vehicle wiring harness to achieve correction and sealing of the new energy vehicle wiring harness, and then insert the pressure rod to lock the sleeve and the detection tube. Step 3: Start the test: Compressed gas is introduced into the test machine to create a pressure environment. The pressure sensor in the test tube monitors the pressure changes in the tube in real time. The user observes the pressure situation through the test machine to determine whether there is a leak.

[0015] Step 4: Spring-open reset: After the test is completed, pull out the pressure rod, the spring reset pushes the sleeve away from the test tube, the pressure ring elastically resets, and the sleeve drives the new energy vehicle wiring harness to be pulled out of the test tube; control the micro air pump to inhale to shrink the airbag. Step 5: Remove the wires and replace parts: Pull out the wiring harness of the new energy vehicle from the sleeve. If you need to replace the airbag, tear off the tape and separate the half ring sleeve one and half ring sleeve two. After replacement, reassemble and fix them and repeat the test.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Through the operation of the detection component, the combination of the metal ring and the rubber ring forms the function of the airbag, which independently separates the rubber ring and the detection tube, and the rubber ring can be removed and replaced from the casing. When there is a problem with the rubber ring, there is no need to remove the entire detection tube. Only the rubber ring in the casing needs to be replaced separately, avoiding the tedious process of overall disassembly. At the same time, since the rubber ring can be replaced in time, it can be guaranteed to be in a good sealing state at all times, reducing the misjudgment of leakage caused by poor sealing of the rubber ring, making the judgment of the leakage source during air tightness detection more accurate, and can also stably form an effective detection pressure to ensure the accuracy of the test results.

[0017] The wiring harness of new energy vehicles is clamped by four pressure rings, and the correction and anti-detachment of the wiring harness of new energy vehicles are achieved through two-point force balance and rigid constraint. It can effectively offset the external force that causes the deviation of the wiring harness of new energy vehicles, and stabilize the wiring harness of new energy vehicles in the correct position required for testing, avoiding sealing failure and leakage caused by outward movement of the wiring harness of new energy vehicles, and the interruption of testing and the need for re-testing due to the falling off of the wiring harness of new energy vehicles.

[0018] After the inspection is completed, the pressure plate will quickly pop the new energy vehicle wiring harness out of the inspection tube, eliminating the need for manual disassembly. This greatly shortens the inspection time for a single new energy vehicle wiring harness, making the entire inspection process smoother, especially in batch inspection scenarios, and can significantly improve overall inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall device of the present invention; Figure 2 This is a schematic diagram of the positions of the detection tube, new energy vehicle wiring harness, sleeve and other structures of the present invention; Figure 3 This is a schematic cross-sectional view of the structures of the detection tube, new energy vehicle wiring harness, sleeve, etc. of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged schematic diagram; Figure 5 For the present invention Figure 3 The enlarged schematic diagram of point B in the middle; Figure 6 This is a schematic cross-sectional view of the structures of the detection tube, new energy vehicle wiring harness, fixing plate, etc. of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram at point C in the middle; Figure 8 For the present invention Figure 6 The enlarged schematic diagram of point D in the middle; Figure 9 It is an exploded schematic diagram of the structures of the present invention, including the sleeve, the semi-ring sleeve 2, and the airbag.

[0020] In the picture: 11. Testing machine; 12. Testing tube; 13. New energy vehicle wiring harness; 21. Sleeve; 22. Half-ring sleeve 1; 23. Half-ring sleeve 2; 24. Micro air pump; 25. Metal ring; 26. Rubber ring; 27. Adhesive tape; 28. Sleeve ring; 29. Pressing ring; 210. Fixing plate; 211. Square rod; 212. Pressing plate 1; 213. Spring; 214. Pressing plate 2; 215. Slot block 1; 216. Slot block 2; 217. Pressing rod. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] The present invention provides the following embodiments: Example 1: Please refer to Figures 1 to 9 As shown, a wiring harness joint air tightness detection device and method include a detection machine 11, a detection tube 12, and a new energy vehicle wiring harness 13. The detection tube 12 is fixedly connected to the detection machine 11, and the new energy vehicle wiring harness 13 is inserted into the detection tube 12.

[0023] Among them, the detection machine 11, the detection tube 12, and the new energy vehicle wiring harness 13 are all existing known technologies, and the end of the detection tube 12 away from the detection machine 11 is set to be open.

[0024] It should be noted that: there is a line connected between the detection machine 11 and the detection tube 12, which is used to introduce compressed gas into the detection tube 12 to create the pressure environment required for detection. A pressure sensor is provided in the cavity of the detection tube 12 to monitor the pressure changes in the detection tube 12 in real time. The pressure change data detected by the pressure sensor in the detection tube 12 is transmitted to the detection machine 11 in real time, and the user can observe the pressure changes in the detection tube 12 from the detection machine 11.

[0025] The detection tube 12 is provided with a detection component, which includes a sleeve 21. The sleeve 21 is sleeved on the new energy vehicle wiring harness 13. A semi-ring sleeve 1 22 and a semi-ring sleeve 2 23 are plugged into the side of the sleeve 21 away from the detection tube 12. A micro air pump 24 is fixedly connected to the top of the semi-ring sleeve 1 22. A metal ring 25 is commonly provided inside the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23. A rubber ring 26 is fixedly connected to the inner ring surface of the metal ring 25. Two adhesive tapes 27 are symmetrically provided on the outer wall of the semi-ring sleeve 1 22. A sleeve 28 is fixedly connected to the end of the detection tube 12 close to the sleeve 21. The sleeve 28 is away from the detection tube 12. One end is fixedly connected with four pressure rings 29 in a circular array, and two fixed plates 210 are symmetrically fixedly connected to the outer wall of the detection tube 12. Each of the two fixed plates 210 is slidably connected to a square rod 211, and the two square rods 211 are fixedly connected with a pressure plate 1 212 at one end away from the fixed plate 210. A spring 213 is respectively provided on the two square rods 211, and two pressure plates 214 are symmetrically fixedly connected to the outer wall of the sleeve 21. A groove block 1 215 is fixedly connected to the outer wall of the detection tube 12, and a groove block 216 is fixedly connected to the outer wall of the sleeve 21. A pressure rod 217 is inserted into the groove block 1 215.

[0026] Among them: reference Figure 4 、 Figure 7 As shown, the sleeve 21 is configured to be open at both ends, and the inner wall of the end of the sleeve 21 away from the detection tube 12 is configured to be an inclined surface.

[0027] Among them: reference Figure 4 、 Figure 9 As shown, the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23 fit tightly together, and the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23 form a complete ring when they fit together. The connection between the semi-ring sleeve 1 22, the semi-ring sleeve 23 and the sleeve 21 can only limit the vertical movement of the semi-ring sleeve 1 22 and the semi-ring sleeve 23. The user can remove the semi-ring sleeve 1 22 and the semi-ring sleeve 23 from the sleeve 21.

[0028] Among them: reference Figure 4 As shown, there is an electrical connection between the micro air pump 24 and the detection machine 11. A through hole is opened on the top of the semi-annular sleeve 22, and the through hole is connected to the air outlet end of the micro air pump 24, that is, the micro air pump 24 can blow and inhale air into the semi-annular sleeve 22.

[0029] Among them: reference Figure 4 、 Figure 7 as well as Figure 9 As shown, the metal ring 25 is configured to have a circular hole on the top. The circular hole on the top of the metal ring 25 is used to align and connect with the top through hole of the semi-ring sleeve 22. The metal ring 25 and the rubber ring 26 are combined into a hollow circular ring with an open top, that is, the blowing and suction of the micro air pump 24 can act on the inside of the metal ring 25.

[0030] Specifically, when the metal ring 25 is aligned with the through hole at the top of the semi-ring sleeve 22 and connected, the top of the hollow ring is sealed, and the blowing and suction of the micro air pump 24 directly acts on the rubber ring 26.

[0031] Among them: reference Figure 4 、 Figure 7 as well as Figure 9 As shown, the metal ring 25 is in contact with the annular inner surface formed by the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23. When the metal ring 25 is located in the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23, and the micro air pump 24 blows and inhales air into the semi-ring sleeve 1 22, the rubber ring 26 will expand or contract accordingly. The rubber ring 26 will stretch inward when it expands, that is, when the new energy vehicle wiring harness 13 is located on the annular inner surface formed by the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23, the rubber ring 26 expands to fit closely with the surface of the new energy vehicle wiring harness 13.

[0032] Among them: reference Figure 2 、 Figure 9 As shown, two tapes 27 are attached to the two ends of the connection between the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23. The tapes 27 connect the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23 through their own adhesion to prevent the semi-ring sleeve 1 22 and the semi-ring sleeve 2 23 from falling off the sleeve 21 during the detection process.

[0033] It should be noted that the user can tear off the two tapes 27 from the half ring sleeve 1 22 and the half ring sleeve 2 23, so that the half ring sleeve 1 22 and the half ring sleeve 2 23 are no longer connected. After completion, the user moves the half ring sleeve 1 22 and the half ring sleeve 2 23 horizontally out of the sleeve 21, and separates the half ring sleeve 1 22 and the half ring sleeve 2 23, so that the two metal rings 25 and the rubber ring 26 are exposed. At this time, the user can replace the rubber ring 26. The user can replace different rubber rings 26 according to the model, material, diameter and other characteristics of the current new energy vehicle wiring harness 13, or replace the rubber ring 26 due to wear of the rubber ring 26. When replacing, the user inserts the new metal ring 25 and rubber ring 26 into the semi-ring sleeve 23. After completion, the user closes the semi-ring sleeve 1 22 and the semi-ring sleeve 23 into a complete ring, and at the same time aligns the metal ring 25 with the through hole on the top of the semi-ring sleeve 1 22 and connects them, and uses two adhesive tapes 27 to stick to the connection between the semi-ring sleeve 1 22 and the semi-ring sleeve 23 on both sides, so that the semi-ring sleeve 1 22 and the semi-ring sleeve 23 are connected into a whole. Then, the semi-ring sleeve 1 22 and the semi-ring sleeve 23 are horizontally inserted into the sleeve 21, so that the semi-ring sleeve 1 22, the semi-ring sleeve 23 and the sleeve 21 are connected into a whole, thereby completing the replacement of the rubber ring 26.

[0034] Among them: reference Figure 5 、 Figure 8 As shown, both ends of the collar 28 and the pressure ring 29 are set to be open, the outer wall of the end of the pressure ring 29 away from the collar 28 is set to a slope, and the slope of the pressure ring 29 is squeezed and adapted to the slope of the sleeve 21. It should be noted that: the pressure ring 29 is set to a material with a certain elastic deformation ability, specifically plastic, and the inner surface of the pressure ring 29 is set to rubber material, and the inner surface of the pressure ring 29 is provided with an anti-slip texture.

[0035] It should be noted that: the sleeve 21 is plugged and adapted with the four pressure rings 29 and the ring 28. When the sleeve 21 is plugged into the four pressure rings 29 and the ring 28, the inclined surface of the sleeve 21 squeezes the inclined surfaces of the four pressure rings 29, so that the four pressure rings 29 are subjected to inward deformation pressure on the ring 28, and then the four pressure rings 29 are bent inward at one end away from the ring 28 to produce elastic deformation. The new energy vehicle wiring harness 13 is inserted into the four pressure rings 29 and the ring 28, and then the four pressure rings 29 are elastically deformed so that the rubber layer and the anti-slip texture on the inner surface thereof come into contact with the new energy vehicle wiring harness 13, so that the new energy vehicle wiring harness 13 is subjected to inward pushing force from all sides, ensuring that the position of the new energy vehicle wiring harness 13 is limited and fixed.

[0036] It should be noted that: if the new energy vehicle wiring harness 13 is squeezed by the rubber ring 26 and the four pressure rings 29 at the same time, that is, two points on the new energy vehicle wiring harness 13 are subjected to force, and the force directions of the two points make the new energy vehicle wiring harness 13 pushed horizontally toward the center of the detection tube 12, that is, the new energy vehicle wiring harness 13 is corrected in position inside the detection tube 12, so that the center line of the new energy vehicle wiring harness 13 coincides with the center line of the detection tube 12, ensuring that the new energy vehicle wiring harness 13 is always located on the central axis of the detection tube 12, preventing the new energy vehicle wiring harness 13 from deviating and causing the rubber ring 26 to seal poorly, thereby affecting the accuracy of the air tightness test results, and the rubber material and anti-slip texture of the pressure ring 29 can lock the new energy vehicle wiring harness 13 in the corrected state inside the detection tube 12. In addition to correcting the new energy vehicle wiring harness 13, it can also prevent the new energy vehicle wiring harness 13 from being accidentally pulled out inside the detection tube 12.

[0037] Among them: reference Figure 8 As shown, the two ends of the spring 213 are fixedly connected to the pressure plate 212 and the side close to the fixed plate 210 respectively. It should be noted that when the spring 213 does not produce elastic deformation, the pressure plate 212 is located on the side of the ring 28 close to the pressure ring 29.

[0038] Among them: reference Figure 2 As shown, the two pressure plates 1 212 are respectively located on the moving paths of the two pressure plates 214. Specifically, when the sleeve 21 moves toward the detection tube 12 and squeezes the four pressure rings 29, the pressure plate 214 contacts the pressure plate 1 212, and the pressure plate 214 pushes the pressure plate 1 212 toward the detection tube 12, so that the square rod 211 slides on the fixed plate 210 toward the detection tube 12, and the spring 213 produces elastic deformation.

[0039] Among them: reference Figure 4 、 Figure 5 As shown, slot block 216 is located at one end of the sleeve 21 close to the detection tube 12, slot block 1 215 is located at one end of the detection tube 12 close to the sleeve 21, both ends of the pressure rod 217 extend downward, and the end of the pressure rod 217 away from slot block 1 215 is plugged and adapted to slot block 2 216.

[0040] It should be noted that: when the sleeve 21 is completely sleeved on the four pressure rings 29 and the sleeve ring 28, the groove block 1 215 is in conflict with the groove block 2 216. The user can pull out the pressure rod 217 from the groove block 1 215 in advance. When the groove block 1 215 is in conflict with the groove block 2 216, the user inserts the pressure rod 217 into the groove block 1 215 and the groove block 2 216 at the same time. At this time, the pressure rod 217 locks the groove block 2 216 and the groove block 1 215 to a limit position, that is, the pressure rod 217 locks the sleeve 21 and the detection tube 12 to a limit position.

[0041] When the detection component is in use, that is, when the detection tube 12 is needed to perform air tightness detection on the new energy vehicle wiring harness 13, the user passes the new energy vehicle wiring harness 13 through the sleeve 21 from one side of the semi-ring sleeve 22, and inserts the connector end of the new energy vehicle wiring harness 13 into the detection tube 12. After completion, the user pushes the sleeve 21 toward the detection tube 12 so that the sleeve 21 is sleeved on the four pressure rings 29 and the sleeve 28. In this process, the sleeve 21 is squeezed with the inclined surfaces of the four pressure rings 29, so that the four pressure rings 29 are bent inwardly at one end away from the sleeve 28 to squeeze the new energy vehicle wiring harness 13. At this time, the new energy vehicle wiring harness 13 is resisted by the rubber layer and the anti-slip texture on the inner surface of the four pressure rings 29. The new energy vehicle wiring harness 13 is pressed inward by the four pressure rings 29. The user starts the micro air pump 24 through the detection machine 11, so that the micro air pump 24 blows air into the rubber ring 26, and the rubber ring 26 gradually fills and expands to squeeze the new energy vehicle wiring harness 13. At this time, the new energy vehicle wiring harness 13 is in a state of being squeezed at two points by the rubber ring 26 and the four pressure rings 29. The new energy vehicle wiring harness 13 is squeezed by the rubber ring 26 and the four pressure rings 29 and is thus corrected in the detection tube 12. At the same time, when the new energy vehicle wiring harness 13 is squeezed by the four pressure rings 29, the anti-slip texture of the four pressure rings 29 fixes the new energy vehicle wiring harness 13 in position. At this time, the inside of the detection tube 12 is sealed by the expansion of the rubber ring 26, that is, the end of the detection tube 12 close to the ring 28 is indirectly sealed by the rubber ring 26.

[0042] When the sleeve 21 moves toward the detection tube 12, the sleeve 21 drives the two pressure plates 214 to move synchronously. The pressure plate 214 contacts the pressure plate 1 212, and the pressure plate 214 pushes the pressure plate 1 212 toward the detection tube 12, so that the square rod 211 slides toward the detection tube 12 on the fixed plate 210, and the spring 213 produces elastic deformation. At the same time, the pressure plate 1 212 gradually moves from the side of the collar 28 close to the pressure ring 29 to the collar 28. 28 is close to the side of the detection tube 12. When the sleeve 21 is completely sleeved on the four pressure rings 29 and the sleeve ring 28, the groove block 1 215 is in contact with the groove block 2 216. The user inserts the pressure rod 217 into the groove block 1 215 and the groove block 2 216 at the same time. At this time, the pressure rod 217 locks the groove block 2 216 and the groove block 1 215 to a limited position, that is, the pressure rod 217 locks the sleeve 21 and the detection tube 12 to a limited position, and then the two springs 213 maintain an elastic deformation state.

[0043] At this time, the user can use the detection machine 11 and the detection tube 12 to perform an air tightness test on the new energy vehicle wiring harness 13. The detection machine 11 adds compressed gas to the detection tube 12 to create the pressure environment required for the test. The pressure sensor in the cavity of the detection tube 12 monitors the pressure changes in the detection tube 12 in real time, and transmits the detected pressure change data to the detection machine 11 in real time. The user can observe the pressure changes in the detection tube 12 from the detection machine 11. If the new energy vehicle wiring harness 13 has poor air tightness, the pressure drop exceeds a certain threshold range, which means that the new energy vehicle wiring harness 13 is judged to be leaking. The user can directly observe the test results from the detection machine 11.

[0044] When the air tightness test of the wiring harness 13 of the new energy vehicle is completed, the user pulls out the pressure rod 217 upwards, and the pressure rod 217 no longer limits the slot block 1 215 and the slot block 216. At this time, the elastic reset of the two springs 213 is no longer restricted. Under the action of the elastic extension of the two springs 213, the two springs 213 push the pressure plate 1 212 toward the sleeve 21, so that the square rod 211 slides toward the side of the sleeve 21 on the fixed plate 210, and while the pressure plate 1 212 moves, the pressure plate 1 212 pushes the sleeve 21 to move to the side away from the detection tube 12 through the pressure plate 2 214, and then the sleeve 21 is pushed by the pressure plate 1 212 Until it is no longer sleeved on the four pressure rings 29 and the sleeve ring 28, under the elastic reset action of the pressure ring 29, the four pressure rings 29 no longer squeeze the new energy vehicle wiring harness 13, and the sleeve 21 can drive the new energy vehicle wiring harness 13 from the inside of the detection tube 12 through the squeezing of the rubber ring 26. At this time, the user controls the micro air pump 24 to inhale air through the detection machine 11, so that the rubber ring 26 contracts, and then the new energy vehicle wiring harness 13 is no longer squeezed by the rubber ring 26. The user pulls the new energy vehicle wiring harness 13 out of the sleeve 21. After completion, the user can repeat the above operation to perform air tightness testing on the remaining new energy vehicle wiring harnesses 13.

[0045] In summary, the following beneficial effects can be achieved during the operation of the detection component: In the prior art, the airbag and the detection tube 12 are designed as an integrated whole, which means that the detection tube 12 needs to be disassembled as a whole to replace the airbag after aging and damage, which is complicated to operate. However, through the operation of the detection assembly, the combination of the metal ring 25 and the rubber ring 26 forms the function of the airbag, and the rubber ring 26 is independently separated from the detection tube 12. The rubber ring 26 can be removed and replaced from the sleeve 21. When a problem occurs with the rubber ring 26, there is no need to disassemble the entire detection tube 12. Only the rubber ring 26 in the sleeve 21 needs to be replaced separately, avoiding the tedious process of overall disassembly. At the same time, since the rubber ring 26 can be replaced in time, it can ensure that it is always in a good sealing state, and can also stably form an effective detection pressure to ensure the accuracy of the detection results.

[0046] At the same time, in the existing technology, the new energy vehicle wiring harness 13 is fixed only by relying on the clamping force of the airbag, which is difficult to resist the impact of high-pressure gas thrust, the weight of the new energy vehicle wiring harness 13 itself and the vibration of external equipment operation, and is easy to cause the new energy vehicle wiring harness 13 to fall off. However, through the operation of the detection component, when the sleeve 21 is connected to the detection tube 12, in addition to the rubber ring 26 clamping and sealing, the new energy vehicle wiring harness 13 is additionally clamped by four pressure rings 29. The correction and anti-falloff of the new energy vehicle wiring harness 13 are achieved by two-point force balance, rigid constraint and other methods, which can effectively offset the external force that causes the new energy vehicle wiring harness 13 to deviate, and stabilize the new energy vehicle wiring harness 13 in the correct position required for detection, avoiding the sealing failure and leakage caused by the outward movement of the new energy vehicle wiring harness 13, and the interruption of detection and the need for re-detection due to the falling off of the new energy vehicle wiring harness 13.

[0047] Moreover, after the inspection is completed, the new energy vehicle wiring harness 13 is quickly ejected from the inspection tube 12 by pressing plate 12, eliminating the need for manual disassembly, thereby greatly shortening the inspection time of a single new energy vehicle wiring harness 13 and making the entire inspection process smoother. Especially in batch inspection scenarios, the overall inspection efficiency can be significantly improved.

[0048] Embodiment 2: A method for detecting air tightness of a wiring harness connector, comprising the following steps: Step 1: Threading and positioning: Pass the new energy vehicle wiring harness 13 from one side of the semi-ring 22 through the sleeve 21, and insert the wiring harness connector end into the detection tube 12.

[0049] Step 2: Fix and clamp: Push the sleeve 21 toward the detection tube 12 so that it is sleeved on the four pressure rings 29 and the sleeve ring 28. The four pressure rings 29 deform and clamp the new energy vehicle wiring harness 13; start the micro air pump 24 to expand the rubber ring 26 and squeeze the new energy vehicle wiring harness 13 to achieve correction and sealing of the new energy vehicle wiring harness 13, and then insert the pressure rod 217 to lock the sleeve 21 and the detection tube 12. Step 3: Start the test: Compressed gas is introduced through the test machine 11 to create a pressure environment. The pressure sensor in the test tube 12 monitors the pressure changes in the tube in real time. The user observes the pressure situation through the test machine 11 to determine whether there is a leak.

[0050] Step 4: Pop-up reset: After the test is completed, pull out the pressure rod 217, the spring 213 resets and pushes the sleeve 21 away from the test tube 12, the pressure ring 29 elastically resets, and the sleeve 21 drives the new energy vehicle wiring harness 13 to be pulled out of the test tube 12; control the micro air pump 24 to inhale air to shrink the rubber ring 26. Step 5: Remove the wire and replace the parts: Pull out the new energy vehicle wiring harness 13 from the sleeve 21. If you need to replace the rubber ring 26, tear off the tape 27 and separate the half ring sleeve 1 22 and the half ring sleeve 2 23. After replacement, reassemble and fix them and repeat the test.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wiring harness joint air tightness detection device, comprising a detection machine (11), a detection tube (12), and a new energy vehicle wiring harness (13), wherein the detection tube (12) is fixedly connected to the detection machine (11), and the new energy vehicle wiring harness (13) is inserted into the detection tube (12), characterized in that: A detection assembly is provided on the detection tube (12), and the detection assembly includes a sleeve (21), which is sleeved on the new energy vehicle wiring harness (13), and a semi-ring sleeve 1 (22) and a semi-ring sleeve 2 (23) are plugged into the side of the sleeve (21) away from the detection tube (12), and a micro air pump (24) is fixedly connected to the top of the semi-ring sleeve 1 (22), and a metal ring (25) is commonly provided inside the semi-ring sleeve 1 (22) and the semi-ring sleeve 2 (23), and a rubber ring (26) is fixedly connected to the inner ring surface of the metal ring (25), and two adhesive tapes (27) are symmetrically provided on the outer wall of the semi-ring sleeve 1 (22).

2. The wiring harness connector air tightness detection device according to claim 1, characterized in that: The detection tube (12) is fixedly connected to one end of the sleeve (21) close to the detection tube (21) with a collar (28), and the end of the collar (28) away from the detection tube (12) is fixedly connected to four pressure rings (29) in a ring array. Two fixed plates (210) are symmetrically fixedly connected to the outer wall of the detection tube (12), and each of the two fixed plates (210) is slidably connected to a square rod (211). The ends of the two square rods (211) away from the detection tube (12) are each fixedly connected to a pressure plate 1 (212), and each of the two square rods (211) is provided with a spring (213). Two pressure plates 2 (214) are symmetrically fixedly connected to the outer wall of the sleeve (21), a groove block 1 (215) is fixedly connected to the outer wall of the detection tube (12), a groove block 2 (216) is fixedly connected to the outer wall of the sleeve (21), and a pressure rod (217) is inserted into the groove block 1 (215).

3. The wire harness connector air tightness detection device according to claim 1, characterized in that: The sleeve (21) is configured to be open at both ends, and the inner wall of one end of the sleeve (21) away from the detection tube (12) is configured to be an inclined surface. The semi-ring sleeve (22) and the semi-ring sleeve (23) are tightly fitted together, and the semi-ring sleeve (22) and the semi-ring sleeve (23) form a complete ring when fitted together.

4. The wiring harness connector air tightness detection device according to claim 1, characterized in that: The micro air pump (24) and the detection machine (11) are electrically connected, and a through hole is provided on the top of the semi-annular sleeve (22), and the through hole is connected to the air outlet of the micro air pump (24).

5. The wire harness connector air tightness detection device according to claim 1, characterized in that: The metal ring (25) is configured to have a circular hole on the top, and the circular hole on the top of the metal ring (25) is used to align and connect with the through hole on the top of the semi-ring sleeve (22). The metal ring (25) and the rubber ring (26) are combined into a hollow circular ring with an open top. Two adhesive tapes (27) are attached to the two ends of the connection between the semi-ring sleeve (22) and the semi-ring sleeve (23). The adhesive tapes (27) connect the semi-ring sleeve (22) and the semi-ring sleeve (23) by their own viscosity.

6. The wire harness connector air tightness detection device according to claim 2, characterized in that: Both ends of the collar (28) and the pressure ring (29) are set to be open, the outer wall of the end of the pressure ring (29) away from the collar (28) is set to be an inclined surface, and the inclined surface of the pressure ring (29) is squeezed and adapted with the inclined surface of the sleeve (21), the inner surface of the pressure ring (29) is set to be made of rubber material, and the inner surface of the pressure ring (29) is provided with an anti-slip texture, and the sleeve (21) is plugged and adapted with the four pressure rings (29) and the collar (28).

7. The wire harness connector air tightness detection device according to claim 2, characterized in that: The two ends of the spring (213) are fixedly connected to the pressure plate 1 (212) and the side close to the fixed plate (210), respectively. The two pressure plates 1 (212) are respectively located on the moving paths of the two pressure plates 2 (214). The groove block 2 (216) is located at the end of the sleeve (21) close to the detection tube (12). The groove block 1 (215) is located at the end of the detection tube (12) close to the sleeve (21). Both ends of the pressure rod (217) extend downward, and the end of the pressure rod (217) away from the groove block 1 (215) is plugged and adapted to the groove block 2 (216).

8. A method for detecting air tightness of a wiring harness connector, characterized in that: The application of a wiring harness joint air tightness detection device as described in claims 1-7 includes the following steps: Step 1: Threading and positioning: Pass the new energy vehicle wiring harness (13) through the sleeve (21) from one side of the semi-ring sleeve (22), and insert the wiring harness joint end into the detection tube (12).

9. The method for detecting air tightness of a wiring harness connector according to claim 8, wherein: Step 2: Fixing and clamping: Push the sleeve (21) toward the detection tube (12) so that it is sleeved on the four pressure rings (29) and the sleeve ring (28), and the four pressure rings (29) are deformed to clamp the new energy vehicle wiring harness (13); start the micro air pump (24) to expand the rubber ring (26) and squeeze the new energy vehicle wiring harness (13), so as to achieve correction and sealing of the new energy vehicle wiring harness (13), and then insert the pressure rod (217) to lock the sleeve (21) and the detection tube (12); Step 3: Start the test: Compressed gas is introduced through the test machine (11) to create a pressure environment. The pressure sensor in the test tube (12) monitors the pressure changes in the tube in real time. The user observes the pressure situation through the test machine (11) to determine whether there is a leak.

10. The method for detecting air tightness of a wiring harness connector according to claim 8, wherein: Step 4: Reset after opening: After the test is completed, the pressure rod (217) is pulled out, the spring (213) is reset to push the sleeve (21) away from the test tube (12), the pressure ring (29) is elastically reset, and the sleeve (21) drives the new energy vehicle wiring harness (13) to be pulled out from the test tube (12); the micro air pump (24) is controlled to suck air to shrink the rubber ring (26); Step 5: Remove the wires and replace the parts: Pull out the new energy vehicle wiring harness (13) from the sleeve (21). If the rubber ring (26) needs to be replaced, tear off the tape (27) and separate the half ring sleeve (22) and the half ring sleeve (23). After replacement, reassemble and fix them and repeat the test.

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