Low-voltage wire harness detection device and detection method

Abstract

The application discloses a low-voltage wire harness detection device and a detection method, relates to the technical field of low-voltage wire harness detection, and comprises a detection workbench, a display screen fixedly connected to the top of the detection workbench, a frame fixedly connected to the upper surface of the detection workbench, and a detection assembly arranged in the frame. The detection assembly comprises a moving frame slidingly connected in the frame, and sealing strips are fixedly connected to the two sides of the moving frame. The horizontally movable detection connector can be adjusted in a small range, thereby avoiding the problem that the terminals of the low-voltage wire harness cannot be effectively plugged due to the short wire harness. In addition, the detection connector can be pushed and pulled to move away from the terminals of the low-voltage wire harness, so that the terminals of the low-voltage wire harness are prevented from being wound or accumulated together when being plugged with the detection connector, and the wire harness is prevented from being disordered and inconvenient to observe the wire harness group line trend.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage wire harness detection, in particular to a low-voltage wire harness detection device and a detection method. BACKGROUND

[0002] Low-voltage wire harness is the nerve of the automobile electrical system, bearing the core functions of power distribution, signal transmission, device control, etc., and its reliability directly affects the key links such as vehicle power performance, safety warning, intelligent interaction. At present, the low-voltage wire harness is mainly detected by a detection workbench. The detection workbench realizes the full-process automatic detection from terminal insertion to fault positioning by integrating an automatic terminal docking mechanism, a multi-channel electrical parameter acquisition module, an AI algorithm analysis system and a quick change tooling.

[0003] However, the connectors on the existing detection workbench for inserting the terminals of the low-voltage wire harness are fixed in position. For some low-voltage wire harnesses of different models, the terminals cannot be inserted into the connectors due to the too short length of the low-voltage wire harness. In addition, for some long low-voltage wire harnesses, the length is too long to cause curling and accumulation, which easily affects the detection of the low-voltage wire harness. In addition, the connectors on the existing detection workbench are directly exposed to the outside, which is easy to enter dust or foreign matter. Over time, this will cause the terminals of the low-voltage wire harness to be not tightly inserted into the connectors, resulting in poor contact. The connector will be worn out after a long time of plugging and unplugging the terminal, which will easily cause the terminal to loosen after being inserted into the connector, thereby causing unstable detection. SUMMARY

[0004] To solve the above technical problems, the present application provides a low-voltage wire harness detection device and a detection method.

[0005] The technical scheme is as follows:

[0006] A low-voltage wire harness fault detection workbench, comprising a detection workbench, a display screen fixedly connected to the top of the detection workbench, a frame fixedly connected to the upper surface of the detection workbench, and a plurality of detection assemblies arranged in the frame;

[0007] The detection assembly comprises a moving frame slidingly connected in the frame, a sealing strip fixedly connected to each side of the moving frame, the sealing strip being fixedly connected to the inner side wall of the frame at the end away from the moving frame, a detection connector inserted into the moving frame, two spring grooves one formed in the bottom of the inner side wall of the moving frame, two springs one fixedly connected to the bottom of the detection connector, one clamping block one fixedly connected to the end of each spring one away from the detection connector, the end of each clamping block one away from the spring one being clamped with the two spring grooves one respectively, two springs two fixedly connected to the inside of the detection connector, and a release rod fixedly connected to the top of each spring two.

[0008] Further, the top of the detection connector is fixedly connected with extension plates on both sides, the top of the moving frame is provided with grooves matched with the extension plates, the bottom of the detection connector is provided with two movable grooves, the clamping block one slides in the movable groove, the middle of the clamping block one is provided with an inclined groove, the inside of the detection connector is provided with a through groove for horizontal sliding of the release rod, the bottom of the release rod is provided with an inclined surface matched with the inclined groove of the clamping block one, the bottom inclined surface of the release rod is in abutment with the inclined groove of the clamping block one, and the top of the release rod protrudes from the upper surface of the detection connector.

[0009] Further, the upper surface of the detection connector is provided with a fixing assembly, the fixing assembly comprises a mounting table placed on the upper surface of the moving frame, four spring threes are fixedly connected in the inside of the mounting table, one clamping block two is fixedly connected to the end away from the mounting table of each spring three, and the top of the detection connector is provided with four clamping grooves two corresponding to the positions of the clamping block two.

[0010] Further, the middle of the mounting table is provided with an opening, four sliding grooves for sliding of the clamping block two are formed in the mounting table, the clamping block two is composed of a vertical plate and a triangular block, and the clamping groove two is in L shape.

[0011] Further, the fixing assembly further comprises two fixed frames fixedly connected to the top of the two sides of the mounting table, two connecting rods are fixedly connected between the two fixed frames, two fixed blocks are slidably connected to the two connecting rods, two spring fours are sleeved on the two connecting rods, and the two ends of each spring four are fixedly connected with the fixed frame and the fixed block.

[0012] Further, the middle of one side of each of the two fixed blocks close to each other is provided with a soft rubber block, and the size of the soft rubber block is matched with the size of the opening of the mounting table.

[0013] A low-voltage wire harness fault detection method, comprising the following steps:

[0014] Step one: horizontally push and pull the moving frame, the moving frame slides in the frame, drives the detection connector to adjust the position synchronously, and solves the difficulty of short wire harness insertion;

[0015] Step two: press the release rod, which moves downward to push and squeeze the clamping block one to compress the spring one, so that the clamping block one is separated from the clamping groove one, and the old detection connector can be taken out;

[0016] Step three: the mounting table is close to the detection connector from top to bottom, the clamping block two is slid under pressure and is inserted, and the spring three is reset and fixed after insertion; when disassembling, the clamping block two is separated from the clamping groove two by pushing, and the mounting table is taken down by pulling, which is flexible and adaptive to the scene;

[0017] Step four: when the low-voltage wire harness is not detected, the two fixed blocks are closed to block the opening of the mounting table, dust and oxidation are prevented, and the service life of the connector is prolonged;

[0018] Step five: the soft rubber block on the two fixed blocks of the plug-in terminal can clamp and wrap the terminal of the low-voltage wire harness, preventing loosening;

[0019] Step six: after the terminal is inserted into the detection connector, the detection workbench sends a weak current to the low-voltage wire harness through the detection connector to confirm whether each circuit is conductive, troubleshoots open circuit or short circuit, simulates actual working voltage and signal, detects the transmission stability of the wire harness, locks the fault circuit through segmented troubleshooting if the test is abnormal, records the problem points, displays and records through the display screen, and finally outputs a detection report.

[0020] As described above, the low-voltage wire harness detection device and detection method have the following beneficial effects:

[0021] The horizontally movable detection connector can be adjusted in a small range, avoiding the problem that the terminal of the low-voltage wire harness cannot be effectively plugged due to the short wire harness. In addition, for some longer wire harnesses, the detection connector can also be pushed and pulled away from the terminal of the low-voltage wire harness, so that the terminal of the low-voltage wire harness avoids winding or piling up when plugged with the detection connector, avoiding the disorder of the wire harness and the inconvenience of observing the line route of the low-voltage wire harness group;

[0022] The detachable detection connector can adapt to different terminals of the low-voltage wire harness group, improving the detection adaptability of the low-voltage wire harness. In addition, the quick detachable mode can improve the maintenance efficiency of the detection connector, avoiding the impact of the detection of the low-voltage wire harness caused by the damage of the detection connector;

[0023] The two mutually adhering fixed blocks can block the opening in the middle of the installation table, thereby sealing the detection connector, preventing dust and other foreign matters from entering the detection connector when not in use, avoiding poor contact caused by the insertion of the terminal of the low-voltage wire harness and the detection connector, ensuring that the terminal of the low-voltage wire harness can be effectively plugged with the detection connector, and preventing the detection connector from being oxidized when not in use for a long time, improving the service life of the detection connector;

[0024] The soft rubber blocks on the two fixed blocks can clamp and wrap the terminal of the low-voltage wire harness, avoiding the situation that the terminal of the low-voltage wire harness and the detection connector are loose during the detection process, improving the stability of the insertion of the terminal of the low-voltage wire harness and the detection connector, and further ensuring the stable detection of the terminal of the low-voltage wire harness. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic view of the overall components of the present application;

[0026] Figure 2 It is a three-dimensional schematic view of the frame, moving frame and other components of the present application;

[0027] Figure 3 is a partial perspective view of the frame, sealing strip and other components of the present application;

[0028] Figure 4 is a partial perspective view of the frame, moving frame, sealing strip and other components of the present application;

[0029] Figure 5 is a perspective view of the moving frame, detection joint, mounting table and other components of the present application;

[0030] Figure 6 is a perspective view of the moving frame, sealing strip, clamping groove one and other components of the present application;

[0031] Figure 7 is a perspective view of the detection joint of the present application;

[0032] Figure 8 is a sectional perspective view of the detection joint, clamping block one, release lever and other components of the present application;

[0033] Figure 9 is a perspective view of the spring one, clamping block one and other components of the present application;

[0034] Figure 10 is a perspective view of the spring three, clamping block two, clamping groove two and other components of the present application;

[0035] Figure 11 is a perspective view of the fixed frame, connecting rod, fixed block and other components of the present application.

[0036] In the present application, the reference signs are as follows:

[0037] 1, detection workbench; 2, display screen;

[0038] Detection assembly: 31, frame; 32, moving frame; 33, sealing strip; 34, detection joint; 35, clamping groove one; 36, spring one; 37, clamping block one; 38, spring two; 39, release lever;

[0039] Fastening assembly: 41, mounting table; 42, spring three; 43, clamping block two; 44, clamping groove two; 45, fixed frame; 46, connecting rod; 47, fixed block; 48, spring four. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] The embodiments provided by the present application will be described in detail below:

[0042] As Figures 1 to 9 shown, a low-voltage wire harness fault detection workbench, comprising a detection workbench 1, the top of the detection workbench 1 is fixedly connected with a display screen 2, the display screen 2 is used for detecting the data detected after the automobile low-voltage wire harness, the upper surface of the detection workbench 1 is fixedly connected with a frame 31, the inside of the frame 31 is provided with a plurality of detection components for detecting the automobile low-voltage wire harness;

[0043] The detection component comprises a moving frame 32 slidably connected in the frame 31, both sides of the moving frame 32 are fixedly connected with sealing strips 33, both ends of the two sealing strips 33 away from the moving frame 32 are fixedly connected with the inner side wall of the frame 31, a detection connector 34 is inserted in the inside of the moving frame 32, two clamping grooves 35 are formed in the bottom of the inner side wall of the moving frame 32, two springs 36 are fixedly connected with the bottom of the detection connector 34, both ends of the two springs 36 away from the detection connector 34 are fixedly connected with a clamping block 37, both ends of the two clamping blocks 37 away from the springs 36 are respectively clamped with the two clamping grooves 35, two springs 38 are fixedly connected with the inside of the detection connector 34, and the top of the two springs 38 is fixedly connected with a release rod 39.

[0044] It should be noted that the detection connector 34 is an interface panel on the existing automobile low-voltage wire harness detection device, which comprises a socket, the top of both sides of the detection connector 34 is fixedly connected with an extension plate, and the top of the moving frame 32 is provided with a groove matched with the extension plate, after the detection connector 34 is inserted into the inside of the moving frame 32, the extension plate of the detection connector 34 can be embedded in the groove of the moving frame 32, for preventing the detection connector 34 from falling, the bottom of the detection connector 34 is provided with two movable grooves corresponding to the positions of the clamping grooves 35, the clamping block 37 is slidably arranged in the movable groove, the middle of the clamping block 37 is provided with an inclined groove, the inside of the detection connector 34 is provided with a through groove for horizontal sliding of the release rod 39, the bottom of the release rod 39 is provided with an inclined surface matched with the inclined groove of the clamping block 37, the bottom inclined surface of the release rod 39 is in abutment with the inclined groove of the clamping block 37, and the top of the release rod 39 protrudes from the upper surface of the detection connector 34.

[0045] Specifically, at present, for the detection of low-voltage wire harness of the automobile, a plurality of terminals of a group of low-voltage wire harnesses are inserted on a plurality of detection connectors 34 on the detection workbench 1, but the existing detection connectors 34 are mostly fixed, and for different combinations of low-voltage wire harness groups, some terminals may not be able to be effectively inserted due to insufficient length of the cable, which causes the low-voltage wire harness to be unable to be effectively detected, and then at this time, the moving frame 32 in a detection assembly can be arbitrarily pushed and pulled, the moving frame 32 slides horizontally inside the frame 31, and the movement of the moving frame 32 can drive the detection connector 34 inserted therein to slide horizontally synchronously, and by horizontally moving the detection connector 34, the detection connector 34 can be adjusted in a small range, avoiding the problem that the terminals of the low-voltage wire harness cannot be effectively inserted due to the short wire harness, in addition, for some longer wire harnesses, the detection connector 34 can also be pushed and pulled to move away from the terminals of the low-voltage wire harness, so that the terminals of the low-voltage wire harness can avoid winding or piling up when being inserted with the detection connector 34, avoiding the disorder of the wire harness and the inconvenience of observing the route of the low-voltage wire harness group.

[0046] It should be noted that when the moving frame 32 moves horizontally, the moving frame 32 will pull one side of the sealing strip 33 to unfold it, and the moving frame 32 will also push the other side of the sealing strip 33 to fold it, by unfolding and folding the sealing strip 33 synchronously according to the moving frame 32, the moving frame 32 can always seal the frame 31 after moving, avoiding dust or other foreign matters from entering the inside of the detection workbench 1, reducing the pollution of dust or foreign matters to the inside of the detection workbench 1.

[0047] In addition, if it is necessary to replace other models or repair and replace the detection connector 34, the release rod 39 can be pressed to move downward in the through slot, and when the release rod 39 moves downward, the spring 38 is compressed, and when the release rod 39 moves downward, the inclined slot of the first clamping block 37 is pushed by the inclined surface of the release rod 39, so that the first clamping block 37 moves in the movable slot to the side close to the spring 36, so that the spring 36 is compressed by the first clamping block 37, and the first clamping block 37 is no longer clamped with the clamping groove 35. At this time, the detection connector 34 can be taken out upward from the moving frame 32, and then other models or new detection connectors 34 are replaced, and the new detection connector 34 is inserted into the inside of the moving frame 32. In this process, the first clamping block 37 on the new detection connector 34 needs to be pressed first, so that it moves to the side close to the spring 36 and compresses the spring 36, so that the end of the first clamping block 37 away from the spring 36 is flush with the outer surface of the detection connector 34. Then the detection connector 34 can be smoothly inserted into the inside of the moving frame 32. When the detection connector 34 is completely placed in the inside of the moving frame 32, the first clamping block 37 is horizontally overlapped with the clamping groove 35, and under the elastic reset action of the spring 36, the first clamping block 37 moves in the movable slot to the side of the clamping groove 35, so that the first clamping block 37 is clamped with the clamping groove 35. Thus, the replacement of the detection connector 34 is completed. Through the replaceable detection connector 34, different terminals of the low-voltage wire harness group can be adapted, and the detection adaptability of the low-voltage wire harness is improved. In addition, the quick replacement mode can improve the maintenance efficiency of the detection connector 34, and avoid the influence of the detection connector 34 damage on the low-voltage wire harness detection.

[0048] It should be noted that when the detection connector 34 slides horizontally in the frame 31, the sliding of the detection connector 34 will push or pull the folded or unfolded sealing strip 33. The sealing strip 33 can always push the detection connector 34 away from the terminal of the wire harness group. The main purpose is to pull the wire harness after the wire harness terminal is inserted with the detection connector 34, so that the wire harness can be straightened or the bending degree of the low-voltage wire harness is reduced. Thus, the winding or accumulation of the low-voltage wire harness can be reduced.

[0049] As shown in Figure 7 , Figure 8 , Figure 10 and Figure 11 , the upper surface of the detection connector 34 is provided with a fixing assembly for fixing the low-voltage wire harness terminal when it is inserted with the detection connector 34. The fixing assembly comprises an installation table 41 placed on the upper surface of the moving frame 32. Four springs 42 are fixedly connected in the inside of the installation table 41. One clamping block 43 is fixedly connected to the end away from the installation table 41 of each spring 42. The top of the detection connector 34 is provided with four clamping grooves 44 corresponding to the positions of the clamping blocks 43.

[0050] It needs to be explained that the middle part of the installation table 41 is provided with an opening, which is convenient for the terminal of the low-voltage wire harness to pass through the opening and be plugged with the detection connector 34. Four sliding grooves are provided on the installation table 41, which can slide the second clamping block 43. The second clamping block 43 is composed of a vertical plate and a triangular block. The second clamping groove 44 is set as L-shaped, which is convenient for the right-angled triangular part at the bottom of the second clamping block 43 to be effectively clamped in it.

[0051] Specifically, when the installation table 41 is installed on the detection connector 34, the installation table 41 can be close to the detection connector 34 from top to bottom. When the right-angled triangular part at the bottom of the second clamping block 43 is in contact with the groove wall of the second clamping groove 44, the second clamping block 43 in contact will slide in the opening to the side close to the spring 42. The spring 42 will be compressed by the second clamping groove 44. When the right-angled triangular part at the bottom of the second clamping block 43 completely enters the inside of the second clamping groove 44, the spring 42 will make the second clamping block 43 slide in the opening to the side away from the spring 42 under the elastic reset action. At this time, the right-angled triangular part at the bottom of the second clamping block 43 will be clamped in the second clamping groove 44, thereby realizing the rapid installation of the installation table 41.

[0052] When it is necessary to remove the installation table 41, the worker can push the second clamping block 43 from the installation table 41, so that the second clamping block 43 moves to the side close to the spring 42. At this time, the right-angled triangular part of the second clamping block 43 is no longer clamped with the second clamping groove 44. Then pull the installation table 41 upwards. The installation table 41 will make the right-angled triangular part of the second clamping block 43 move out of the second clamping groove 44, thereby realizing the removal of the installation table 41 at this time.

[0053] As shown in Figure 8 , Figures 10 to 11 The fixing assembly further comprises two fixing frames 45 fixedly connected to the top of the two sides of the installation table 41. Two connecting rods 46 are fixedly connected between the two fixing frames 45. Two fixing blocks 47 are slidably connected on the two connecting rods 46. Two springs 48 are sleeved on the two connecting rods 46. The two ends of each spring 48 are fixedly connected with the fixing frame 45 and the fixing block 47.

[0054] It needs to be explained that the middle part of the two fixing blocks 47 close to each other is provided with a soft rubber block, and the size of the soft rubber block is matched with the size of the opening of the installation table 41, which is used for elastic deformation to adapt to the shape of the terminal of the low-voltage wire harness of different models.

[0055] Specifically, when the terminal of the low-voltage wire harness is not inserted into the detection connector 34, and the mounting table 41 is mounted on the detection connector 34 according to the above description, the two fixed blocks 47 are initially abutted against each other under the action of the spring four 48, and the two abutted fixed blocks 47 can block the opening in the middle of the mounting table 41, thereby sealing the detection connector 34, preventing foreign matters such as dust from entering the detection connector 34 when not in use, avoiding poor contact caused by foreign matters or dust on the terminal of the low-voltage wire harness and the detection connector 34, ensuring that the terminal of the low-voltage wire harness can be effectively inserted into the detection connector 34, and preventing the detection connector 34 from being oxidized when not in use for a long time, thereby prolonging the service life of the detection connector 34.

[0056] When the terminal of the low-voltage wire harness needs to be inserted into the detection connector 34, the two fixed blocks 47 are pushed to the two sides by the worker, so that the two fixed blocks 47 slide to the two sides on the connecting rod 46, and the spring four 48 is compressed when the two fixed blocks 47 move to the two sides. At this time, the fixed block 47 no longer seals the upper part of the detection connector 34, and then the worker inserts the terminal of the low-voltage wire harness to be detected into the detection connector 34, and finally releases the fixed block 47. The two fixed blocks 47 slide to the middle of the connecting rod 46 under the elastic reset action of the spring four 48, and the soft rubber blocks on the two fixed blocks 47 can clamp and wrap the terminal of the low-voltage wire harness, thereby avoiding poor contact caused by loose insertion of the terminal of the low-voltage wire harness and the detection connector 34 during detection, improving the stability of the insertion of the terminal of the low-voltage wire harness and the detection connector 34, and further ensuring stable detection of the terminal of the low-voltage wire harness.

[0057] In addition, if the fixing assembly does not need to be protected, the mounting table 41 can be removed according to the above description, so that the entire fixing assembly is not mounted on the detection connector 34. In addition, when replacing detection connectors 34 of different models, the mounting table 41 can be mounted on different models for repeated use, which can adapt to different use requirements.

[0058] A low-voltage wire harness fault detection method, comprising the following steps:

[0059] Step one: horizontally push and pull the moving frame 32, and the moving frame 32 slides in the frame 31 to drive the detection connector 34 to adjust the position synchronously, thereby solving the difficulty of inserting the short wire harness;

[0060] Step two: press the release rod 39 to move downward to push the clamping block one 37 and compress the spring one 36, so that the clamping block one 37 is separated from the clamping groove one 35, and the old detection connector 34 can be taken out;

[0061] Step 3: The mounting platform 41 approaches the test connector 34 from top to bottom. The second locking block 43 slides under pressure and is inserted. After insertion, the third spring 42 resets and fixes it. When removing, push the second locking block 43 out of the slot 44 and pull the mounting platform 41 to remove it, which can be flexibly adapted to the scene.

[0062] Step 4: When the low-voltage harness is not being tested, the two fixing blocks 47 are closed to seal the opening of the mounting platform 41, preventing dust and oxidation and extending the service life of the connector.

[0063] Step 5: After the terminals are plugged in, the soft rubber blocks on the two fixing blocks 47 will clamp and wrap the terminals of the low-voltage wire harness to prevent them from loosening;

[0064] Step Six: After the terminal is inserted into the test connector 34, the test workbench 1 sends a weak current to the low-voltage harness through the test connector 34 to confirm whether each line is conductive, check for open circuits or short circuits, simulate the actual working voltage and signal, and test the transmission stability of the harness. If the test is abnormal, the faulty line is located by segmented troubleshooting, the problem point is recorded, and the record is displayed on the display screen 2. Finally, the test report is output.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-voltage wiring harness fault detection workbench, comprising a detection workbench (1), wherein a display screen (2) is fixedly connected to the top of the detection workbench (1), characterized in that, A frame (31) is fixedly connected to the upper surface of the inspection workbench (1), and multiple inspection components are arranged inside the frame (31); The detection assembly includes a movable frame (32) that is slidably connected within a frame (31). Both sides of the movable frame (32) are fixedly connected with sealing strips (33). The ends of the two sealing strips (33) away from the movable frame (32) are fixedly connected to the inner wall of the frame (31). A detection connector (34) is inserted inside the movable frame (32). Two slots (35) are opened at the bottom of the inner wall of the movable frame (32). Two springs (36) are fixedly connected to the bottom of the detection connector (34). A locking block (37) is fixedly connected to the ends of the two springs (36) away from the detection connector (34). The ends of the two locking blocks (37) away from the springs (36) are respectively engaged with the two slots (35). Two springs (38) are fixedly connected inside the detection connector (34). A release rod (39) is fixedly connected to the top of the two springs (38). The top two sides of the test connector (34) are fixedly connected with extension plates. The top of the moving frame (32) is provided with a groove that matches the extension plate. The bottom of the test connector (34) is provided with two movable slots. The first locking block (37) slides inside the movable slot. The middle of the first locking block (37) is provided with an inclined slot. The inside of the test connector (34) is provided with a through slot that allows the release rod (39) to slide horizontally. The bottom of the release rod (39) is set as an inclined surface that matches the inclined slot of the first locking block (37). The bottom inclined surface of the release rod (39) abuts against the inclined slot of the first locking block (37). The top of the release rod (39) protrudes from the upper surface of the test connector (34). The upper surface of the test connector (34) is provided with a fixing component, which includes a mounting platform (41) placed on the upper surface of the moving frame (32). Four springs (42) are fixedly connected inside the mounting platform (41). Each of the four springs (42) is fixedly connected to a locking block (43) at the end away from the mounting platform (41). The top of the test connector (34) is provided with four locking slots (44) corresponding to the positions of the locking blocks (43).

2. The low-voltage wiring harness fault detection workbench according to claim 1, characterized in that, An opening is provided in the middle of the mounting platform (41), and four sliding grooves are provided on the mounting platform (41) for the second locking block (43) to slide. The second locking block (43) consists of a vertical plate and a triangular block, and the second locking groove (44) is set in an L shape.

3. The low-voltage wiring harness fault detection workbench according to claim 1, characterized in that, The fixing assembly also includes two fixing brackets (45) fixedly connected to the top of both sides of the mounting platform (41). Two connecting rods (46) are fixedly connected between the two fixing brackets (45). Two fixing blocks (47) are slidably connected on the two connecting rods (46). Two springs (48) are sleeved on each of the two connecting rods (46). The two ends of each spring (48) are fixedly connected to the fixing bracket (45) and the fixing block (47) respectively.

4. The low-voltage wiring harness fault detection workbench according to claim 3, characterized in that, The two fixing blocks (47) are provided with soft rubber blocks in the middle of their adjacent sides, and the size of the soft rubber blocks is adapted to the opening size of the mounting platform (41).

5. The low-voltage wiring harness fault detection workbench according to any one of claims 1-4 is now proposed as a method for low-voltage wiring harness fault detection, characterized in that... Includes the following steps: Step 1: Push and pull the moving frame (32) horizontally. The moving frame (32) slides within the frame (31), causing the detection connector (34) to adjust its position synchronously, thus solving the problem of short wire harness insertion difficulty. Step 2: Press the release lever (39), which moves downward to push the locking block (37) to compress the spring (36), so that the locking block (37) disengages from the slot (35), and the old test connector (34) can be removed. Step 3: The mounting platform (41) approaches the test connector (34) from top to bottom. The second locking block (43) slides under pressure and is inserted. The third spring (42) resets and fixes it. When removing, push the second locking block (43) to disengage from the second locking slot (44) and pull the mounting platform (41) to remove it. It can be flexibly adapted to different scenarios. Step 4: When the low-voltage harness is not being tested, the two fixing blocks (47) are closed to seal the opening of the mounting platform (41), preventing dust and oxidation and extending the service life of the connector; Step 5: After the terminals are plugged in, the soft rubber blocks on the two fixing blocks (47) will clamp and wrap the terminals of the low-voltage harness to prevent them from loosening; Step 6: After the terminal is inserted into the test connector (34), the test workbench (1) sends a weak current to the low-voltage harness through the test connector (34) to confirm whether each line is conductive, check for open circuits or short circuits, simulate the actual working voltage and signal, and test the transmission stability of the harness. If the test is abnormal, the faulty line is locked by segmented investigation, the problem point is recorded, and the record is displayed on the display screen (2). Finally, the test report is output.

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