Testing device for automobile wire harness

Abstract

The invention relates to the technical field of wire harnesses, and discloses an automobile wire harness testing device which comprises a detection device, a mounting plate is fixedly connected to the rear side of the detection device, a plurality of wiring holes are formed in the rear side of the detection device, a wiring pipe is arranged in the mounting plate, and a plurality of second baffles are fixedly connected to the top of the mounting plate. A clamping assembly is arranged at the top of the wiring pipe, a plurality of first fixing plates and a plurality of second fixing plates are fixedly connected to the bottom of the mounting plate, a fixing shaft is fixedly connected to the sides, close to each other, of the first fixing plates and the second fixing plates, the fixing shaft is sleeved with a first spring, and a sliding block is slidably connected to the exterior of the fixing shaft. According to the invention, the belt pulley I and the belt pulley II of the transmission assembly are linked with the transmission belt, and the sliding block compresses the spring I and drives the limiting plate of the telescopic assembly to compress the spring II, so that automatic switching and accurate positioning of the wiring pipe among multiple wiring holes are realized.

Description

Technical Field

[0001] This invention relates to the field of wiring harness technology, and more particularly to a testing device for automotive wiring harnesses. Background Technology

[0002] As the "neural network" of the vehicle's electrical system, automotive wiring harnesses require testing of multiple modules, including continuity, withstand voltage, and signal transmission characteristics. They are widely used in vehicle manufacturing lines, wiring harness processing plants' quality inspection processes, and after-sales maintenance and testing scenarios. In batch testing, rapid switching between multiple workstations and precise positioning are core requirements for improving testing efficiency and ensuring data accuracy. Time-consuming workstation switching or positioning errors can lead to test interruptions, data distortion, directly increasing labor costs and rework rates, and hindering the automation process of automotive production and testing.

[0003] Existing automotive wiring harness testing equipment generally adopts a single connection hole and manual plug-and-play mode, where operators manually plug and unplug the wiring harness to connect it to the connection holes of different testing modules to achieve function switching. However, this mode suffers from extremely low workstation switching efficiency, manual plugging and unplugging requires machine shutdown, and the cumulative time consumed during batch testing increases exponentially, making it difficult to adapt to the pace of large-scale production.

[0004] Therefore, a testing device for automotive wiring harnesses is proposed to address the above-mentioned problems. Summary of the Invention

[0005] To overcome the above shortcomings, the present invention provides a testing device for automotive wiring harnesses, which aims to improve the problem of extremely low workstation switching efficiency in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A testing device for automotive wiring harnesses includes a testing device, a mounting plate fixedly connected to the rear side of the testing device, multiple wiring holes opened on the rear side of the testing device, a wiring tube disposed inside the mounting plate, multiple baffles fixedly connected to the top of the mounting plate, a locking assembly disposed at the top of the wiring tube, multiple fixing plates and multiple fixing plates fixedly connected to the bottom of the mounting plate, a fixing shaft fixedly connected to the adjacent side of the fixing plates, a spring sleeved on the outside of the fixing shaft, a sliding block slidably connected to the outside of the fixing shaft, a connecting plate fixedly connected to the front side of the sliding block, a transmission assembly fixedly connected to the rear side of the testing device, a force-bearing shaft rotatably connected to the bottom of the transmission assembly, a rotating plate rotatably connected to the bottom of the fixing plates, a connecting plate rotatably connected to the bottom of the sliding block, a receiving shell rotatably connected to the bottom of the fixing plates, a telescopic assembly disposed inside the receiving shell, a telescopic plate fixedly connected to the bottom of the telescopic assembly, and multiple baffles fixedly connected to the top of the testing device.

[0008] As a further description of the above technical solution:

[0009] The engaging assembly includes a push plate and a locking plate. A groove is provided on the top of the wiring tube. The push plate is rotatably connected to the front side of the inside of the groove. The locking plate is fixedly connected to the top of the push plate. A torsion spring is provided at the bottom of the push plate. The other end of the torsion spring is fixedly connected to the bottom inner wall of the groove.

[0010] As a further description of the above technical solution:

[0011] The transmission assembly includes multiple fixed posts 1 and multiple fixed posts 2. The front sides of the multiple fixed posts 1 and multiple fixed posts 2 are fixedly connected to the rear side of the detection device. A pulley 1 is fixedly connected to the outside of the fixed post 1, and a transmission belt is sleeved on the outside of the pulley 1. A pulley 2 is fixedly connected to the outside of the fixed post 2. The inside side of the transmission belt is sleeved on the outside of the pulley 2. A force-bearing plate is fixedly connected to the top of the transmission belt. A transmission plate is fixedly connected to the bottom of the transmission belt. A connecting plate 2 is rotatably connected to the bottom of the transmission plate.

[0012] As a further description of the above technical solution:

[0013] The telescopic assembly includes two limiting rods and two springs. The interior of the receiving shell has a cavity. The two limiting rods are fixedly connected to the front and rear sides of the interior of the cavity, respectively. The springs are sleeved on the outside of the limiting rods. The outside of the two limiting rods is slidably connected to a limiting plate. The top of the telescopic plate is fixedly connected to the bottom of the limiting plate.

[0014] As a further description of the above technical solution:

[0015] One end of the second spring is fixedly connected to the outside of the limiting plate, and the other end of the second spring is fixedly connected to the top inner wall of the cavity. The outside of the limiting plate is slidably connected to the inside of the cavity.

[0016] As a further description of the above technical solution:

[0017] The bottom of the second connecting plate is rotatably connected to the outside of the force-bearing shaft, and the other side of the first connecting plate is fixedly connected to the outside of the force-bearing plate.

[0018] As a further description of the above technical solution:

[0019] One end of the spring is fixedly connected to the outside of the fixed plate, and the other end of the spring is fixedly connected to the outside of the sliding block. The bottom of the rotating plate is in contact with the outside of the baffle.

[0020] As a further description of the above technical solution:

[0021] The force-bearing shaft is fixedly connected to the outside of the telescopic plate, and the other side of the connecting plate is rotatably connected to the outside of the rotating plate.

[0022] The present invention has the following beneficial effects:

[0023] 1. In this invention, the automatic switching and precise positioning of the wiring conduit between multiple wiring holes is achieved by linking the first and second pulleys of the transmission assembly with the transmission belt, and cooperating with the sliding block to compress the first spring, which in turn drives the limiting plate of the telescopic assembly to compress the second spring. When the wiring conduit is pulled laterally, the rotating plate pushes the sliding block to slide and compress the first spring. The sliding block drives the force plate through the connecting plate, causing the transmission belt to drive the transmission plate to link with the connecting plate and the force shaft, pushing the telescopic plate to compress the second spring. After the wiring conduit moves to the next wiring hole, the rebound force of the first and second springs drives the sliding block and the limiting plate to reset respectively. Combined with the cooperation of the rotating plate and the telescopic plate, the positioning and alignment of the wiring conduit are completed, meeting the station switching requirements of multi-functional wire harness testing. Compared with the traditional testing process, this significantly improves testing efficiency and station switching accuracy.

[0024] 2. In this invention, the pressing plate, locking plate, and torsion spring of the locking assembly work together to link the wiring conduit and the second baffle on the top of the mounting plate, achieving rapid locking and fixing when the wire harness is connected to the wiring conduit, as well as preventing the wiring conduit from falling off during testing. When the wiring conduit is inserted, the second baffle presses the locking plate, driving the pressing plate to compress the torsion spring, completing the connection between the wire harness and the wiring hole; when the torsion spring resets, the pressing plate drives the locking plate to rise. With the limiting characteristic of the second baffle, the wiring conduit is effectively prevented from falling off due to vibration or pulling during testing, ensuring the stability of the electrical connection of the wire harness and providing basic support for the accurate acquisition of test data. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a testing device for automotive wiring harnesses proposed in this invention;

[0026] Figure 2 This is a schematic diagram of the wiring conduit of a testing device for automotive wiring harnesses proposed in this invention;

[0027] Figure 3 for Figure 2 Enlarged view of point A;

[0028] Figure 4 This is a schematic diagram of the wiring hole structure of a testing device for automotive wiring harnesses proposed in this invention;

[0029] Figure 5 This is a schematic diagram of the structure of the sliding block of a testing device for automotive wiring harnesses proposed in this invention;

[0030] Figure 6 for Figure 5 Enlarged view of point B;

[0031] Figure 7 This is a schematic diagram of the connection plate two of the automotive wiring harness testing device proposed in this invention;

[0032] Figure 8 for Figure 7 Enlarged view of point C;

[0033] Figure 9 This is a schematic diagram of the transmission belt structure of a testing device for automotive wiring harnesses proposed in this invention.

[0034] Legend:

[0035] 1. Detection device; 2. Mounting plate; 3. Wiring hole; 4. Wiring pipe; 5. Groove; 6. Press plate; 7. Clamping plate; 8. Torsion spring; 9. Fixing plate one; 10. Fixing plate two; 11. Fixing shaft; 12. Spring one; 13. Sliding block; 14. Connecting plate one; 15. Fixing column one; 16. Belt pulley one; 17. Transmission belt; 18. Fixing column two; 19. Belt pulley two; 20. Force plate; 21. Transmission plate; 22. Connecting plate two; 23. Force shaft; 24. Rotating plate; 25. Connecting plate three; 26. Receiving shell; 27. Cavity; 28. Limiting rod; 29. ​​Spring two; 30. Limiting plate; 31. Telescopic plate; 32. Baffle one; 33. Baffle two. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Reference Figures 1 to 3This invention provides an embodiment of a testing device for automotive wiring harnesses, comprising a testing device 1 as the core carrier for testing the electrical performance and signals of the wiring harness. It integrates multiple interfaces (adapting to different wiring harness plug specifications such as round and square) to achieve multi-functional testing of conductivity (DC resistance detection), withstand voltage (insulation resistance and breakdown voltage testing), and signal transmission (high-frequency pulse and analog signal analysis). Its internal high-precision sensor can collect test data in real time and feed it back to a display terminal. A mounting plate 2 made of high-strength alloy material is fixedly connected to the rear of the testing device 1, providing a rigid mounting base for the wiring conduit 4 and transmission components. Its surface is anodized to enhance wear resistance, constructing the overall structural framework of the device while withstanding the mechanical stress caused by frequent insertion and removal of the wiring conduit 4. Multiple wiring holes 3 are arranged in a matrix on the rear of the testing device 1, each with an independent electrical contact (gold-plated for oxidation prevention), corresponding to different functional testing modules of the wiring harness (such as power circuit, signal circuit, and grounding circuit), meeting the requirements for simultaneous testing of multiple parameters. The edges of the holes are chamfered to avoid scratching the wiring harness plugs.

[0038] The mounting plate 2 has a wiring tube 4 inside, which is injection molded from insulating and flame-retardant material. The inner wall is smooth and has a wear-resistant coating. It serves as a carrier for wire harness passage and docking. It can not only achieve a stable electrical connection between the wire harness and the testing device 1, but also drive the wire harness to move as a whole when switching positions. The elastic sealing rings at both ends can be adapted to wire harnesses of different diameters to prevent dust from entering during testing. The top of the mounting plate 2 is fixedly connected with multiple baffles 33, which work together with the locking component. Through the interference of the contour of the locking plate 7, a mechanical lock is formed to prevent the wiring tube 4 from falling off due to vibration during testing. The spacing of the baffles corresponds to the position of the wiring hole 3 to ensure accurate docking of the wire harness after each locking. The locking component on the top of the wiring tube 4 realizes quick locking or unlocking of the wiring tube 4 and the mounting plate 2 through mechanical linkage, replacing the traditional manual plugging and unplugging method, reducing operation steps, and improving wiring efficiency and connection stability.

[0039] The engaging assembly includes a push plate 6 and a locking plate 7. The top of the wiring conduit 4 has a stepped groove 5, the depth of which matches the rotation stroke of the push plate 6, precisely accommodating the push plate 6, locking plate 7, and torsion spring 8, ensuring a compact layout and no interference between components. The push plate 6, serving as a human-machine interface component, is rotatably connected to the front of the groove 5. Its surface has an injection-molded anti-slip texture (diamond-shaped raised dots) to improve the operating feel. By rotating around the pivot to compress or release the torsion spring 8, the locking plate 7 is driven to move up and down. A copper sleeve is embedded at the rotating shaft to reduce friction and wear. The top of the push plate 6 is fixedly connected to the locking plate 7, which engages with the baffle 33. Its end has a wedge-shaped design for easy insertion into the baffle. The gap between the plates is such that when the clamping plate 7 rises, it is limited by the second baffle 33 to clamp the connecting pipe 4, and when it falls, the limit is released to facilitate pipe removal. The surface of the clamping plate 7 is hardened to enhance wear resistance. The bottom of the push plate 6 is equipped with a torsion spring 8 made of high elastic alloy material. After heat treatment, the elastic coefficient is stable after long-term use, providing continuous elastic restoring force to drive the push plate 6 and the clamping plate 7 to automatically reset, ensuring the reliability of the clamping state. The other end of the torsion spring 8 is fixedly connected to the bottom inner wall of the groove 5 to provide a fixed fulcrum for the torsion spring 8. Its mounting groove accurately positions the end of the torsion spring 8 to ensure that the elastic force is transmitted along the rotation tangent direction of the push plate 6, avoiding the generation of lateral force that could cause component deformation.

[0040] The bottom of the mounting plate 2 is fixedly connected to multiple fixing plates 9 and 10 using a stamping process. They are rigidly connected to the mounting plate 2 by bolts, serving as the mounting base for the rotating plate 24 and the housing 26, and supporting the double-rotation structure to achieve bidirectional positioning. One end of the spring 12 is fixedly connected to the outside of the fixing plate 10 via a hook structure, providing a stable fixed end for the spring 12 and ensuring that the direction of the elastic force is consistent with the direction of movement of the sliding block 13. The other end of the spring 12 is fixedly connected to the outside of the sliding block 13, also via a hook connection, providing a uniform elastic restoring force for the sliding block 13. Its elastic coefficient is calibrated, which can provide sufficient buffering during workstation switching and ensure that the sliding block 13 returns to its precise position during reset.

[0041] A fixed shaft 11, made of cold-drawn round steel and chrome-plated for rust prevention, is fixedly connected to one side of fixed plate 9 and fixed plate 10. It provides linear sliding guidance for sliding block 13. Its two ends are positioned with the fixed plate through shaft shoulders, constraining the movement direction of sliding block 13 to ensure no radial offset. A spring 12, a cylindrical helical spring, is sleeved on the outside of fixed shaft 11. Its number of turns and wire diameter match the stroke of sliding block 13, providing elastic buffer to balance the impact force during sliding and avoid hard contact that could cause wear on the parts. Sliding block 13 is slidably connected to the outside of fixed shaft 11. It has a self-lubricating bearing embedded inside, which acts as a force transmission carrier to convert the rotational force of rotating plate 24 into linear motion. The guide grooves on both sides of the sliding block 13 are precisely matched with fixed shaft 11 to ensure smooth sliding without jamming. A connecting plate 14 is fixedly connected to the front of sliding block 13 by laser welding. Its length is adapted to the position of the transmission component, accurately transmitting the linear motion of sliding block 13 to the transmission component. The surface of the connecting plate is treated with anti-corrosion to enhance durability.

[0042] The rear of the detection device 1 is fixedly connected to a transmission assembly, which forms a power transmission system through the meshing of a pulley and a transmission belt 17, enabling coordinated action of multiple components and driving the wiring conduit 4 to complete the station switching. The bottom of the transmission assembly is rotatably connected to a force-bearing shaft 23, which is a stepped shaft structure. It is connected to the transmission plate 21 via bearings, transmitting the force of the transmission plate 21 to the telescopic plate 31. The shaft shoulder is rounded to reduce stress concentration. The bottom of the fixed plate 9 is rotatably connected to a rotating plate 24, which is injection molded from high-strength plastic. Its rotating shaft is clearance-fitted with the fixed plate. When pushed by the wiring conduit 4, it can rotate flexibly to trigger the workstation switching, and the plate surface is designed with reinforcing ribs to improve its resistance to deformation; the bottom of the sliding block 13 is rotatably connected to the connecting plate 3 25, and the two ends are connected to the sliding block 13 and the rotating plate 24 through the pin shaft, which converts the rotational force of the rotating plate 24 into the linear motion of the sliding block 13. Its length design ensures the optimal force transmission angle; the other side of the connecting plate 3 25 is rotatably connected to the outside of the rotating plate 24 to provide a force transmission fulcrum for the rotating plate 24. The pin shaft is embedded with a wear-resistant bushing to ensure that the force can still be smoothly transmitted after long-term rotation;

[0043] The bottom of the fixed plate 20 is rotatably connected to a housing 26 made of die-cast aluminum alloy. An internal telescopic assembly provides a closed installation space for the limit rod 28 and spring 29. Its rotating shaft is precisely matched with the fixed plate and can rotate with the transmission assembly to cooperate with the rotating plate 24 in positioning the wiring tube 4. The housing 26 contains a telescopic assembly that uses elastic deformation to achieve elastic compression and repositioning of the wiring tube 4, balancing the impact force during station switching and preventing damage to the wiring harness from hard contact. The bottom of the telescopic assembly is fixedly connected to a telescopic plate 31 with an arc-shaped end (the arc matches the outer wall of the wiring tube 4), increasing the contact area when in contact with the wiring tube 4. When compressed, it contracts and repositions to form a rigid support for positioning. The top of the detection device 1 is fixedly connected to multiple baffles 32 that contact the bottom of the rotating plate 24. Their height is set according to the station spacing, limiting the maximum rotation range of the rotating plate 24 and assisting in precise station positioning. The bottom of the rotating plate 24 contacts the outside of the baffles 32, and the contact limit regulates the rotation angle, ensuring consistency and switching accuracy for each station switch.

[0044] Reference Figures 4 to 6 The transmission assembly includes multiple fixed posts 15 and multiple fixed posts 18 as mounting carriers for the pulleys. Their heights are calibrated to ensure parallelism of the pulley axes, guaranteeing the tension and stable movement of the transmission belt 17. The front sides of the multiple fixed posts 15 and multiple fixed posts 18 are fixedly connected to the rear side of the detection device 1 via threaded connections, providing a stable fulcrum for the transmission assembly. A pulley 16 is externally fixed to the fixed post 15 as the drive pulley, with its teeth meshing with the transmission belt 17 at an IT-level precision, driving the transmission... The drive belt 17 moves smoothly; the external sleeve of the pulley 16 is fitted with a drive belt 17 made of polyurethane material with an embedded steel wire skeleton, which is wear-resistant and tensile-resistant, connecting the pulley 16 and the pulley 2 19 to transmit rotational power and realize the synchronous movement of multiple components; the external fixed connection of the fixed column 2 18 is the pulley 2 19, which has the same number of teeth as the pulley 16, and they cooperate to change the transmission direction to ensure synchronous up and down movement; one side of the internal sleeve of the drive belt 17 is fitted on the external sleeve of the pulley 2 19, and the interference fit ensures stable transmission meshing and avoids slippage that affects power transmission;

[0045] The top of the transmission belt 17 is fixedly connected to a force-bearing plate 20, which is rigidly connected to the transmission belt 17 by bolts. A connecting plate 14 is used to convert the cyclic motion of the transmission belt 17 into the linear motion of the sliding block 13. The other side of the connecting plate 14 is fixedly connected to the outside of the force-bearing plate 20 by riveting to ensure the connection strength and ensure stable force transmission without loosening. The bottom of the transmission belt 17 is fixedly connected to a transmission plate 21, which is symmetrically distributed with the force-bearing plate 20. A connecting plate 22 is used to convert the motion of the transmission belt 17 into the lifting motion of the force-bearing shaft 23, realizing synchronous drive of the two components. The bottom of the transmission plate 21 is rotatably connected to the connecting plate 22 at both ends by pins, providing a rotation fulcrum for the transmission plate 21 and the force-bearing shaft 23 to adapt to changes in motion angle. The bottom of the connecting plate 22 is rotatably connected to the outside of the force-bearing shaft 23 by bearings to reduce friction and ensure adaptive force transmission angle.

[0046] Reference Figures 7 to 9 The telescopic assembly includes two limiting rods 28 and two springs 29. The interior of the housing 26 has a rectangular cavity 27 with a polished inner wall to reduce friction, constraining the movement direction of the limiting rods 28 and springs 29. The two limiting rods 28 are fixedly connected to the front and rear sides of the cavity 27, respectively, using hardened round steel, providing sliding guidance for the limiting plate 30 and ensuring the linearity of the telescopic plate 31's lifting movement. The springs 29, sleeved outside the limiting rods 28, are compression springs with an elastic coefficient matching the compressive force of the connecting pipe 4, providing elastic buffering and restoring force to balance the compressive impact of the connecting pipe 4. The limiting rod 28 is externally slidably connected to a limiting plate 30 made of wear-resistant plastic, which connects the second spring 29 and the telescopic plate 31 to transmit elastic force. Its edge is clearance-fitted with the cavity 27 to ensure smooth sliding. One end of the second spring 29 is fixedly connected to the outside of the limiting plate 30 and positioned by a slot, providing a fixed end for the second spring 29. The other end of the second spring 29 is fixedly connected to the top inner wall of the cavity 27 and is also positioned by a slot, ensuring that the spring deformation is controllable and the reset is accurate. The limiting plate 30 is externally slidably connected to the inside of the cavity 27, and its guide edges on both sides cooperate with the cavity 27 to constrain the range of motion to ensure structural stability.

[0047] The top of the telescopic plate 31 is fixedly connected to the bottom of the limiting plate 30 by bolts, connecting the limiting plate 30 and the force-bearing shaft 23 to transmit elastic force and thrust, thereby realizing telescopic movement; the external fixed connection of the force-bearing shaft 23 is rigidly connected to the telescopic plate 31 through a bushing, connecting the transmission component and the telescopic plate 31 to transmit driving force, ensuring that the telescopic movement is synchronized with the movement of the transmission component.

[0048] Working materials: When testing automotive wiring harnesses, the device achieves functional coverage through multiple sets of wiring holes 3 on the rear side of the testing device 1. Different wiring holes 3 correspond to specific testing modules for wiring harness conductivity, withstand voltage, signal transmission, etc. When the test process starts, the operator first inserts the wiring harness into the wiring tube 4, and then inserts the wiring tube 4 along the adapter interface at the bottom of the mounting plate 2. At this time, the baffle 33 on the top of the mounting plate 2 will abut against the locking plate 7 of the locking component on the top of the wiring tube 4, forcing the locking plate 7 to press down on the pressing plate 6. The pressing plate 6 swings downward around the rotation fulcrum on the front side of the groove 5, simultaneously compressing the torsion spring 8 at the bottom, so that the wiring tube 4 can be smoothly inserted into the mounting plate 2 until the wiring harness is precisely connected with the first wiring hole 3, triggering the initial test of the testing device 1.

[0049] The elastic potential energy of the torsion spring 8 then drives the push plate 6 to reset, causing the locking plate 7 to lift upwards. At this time, the locking plate 7 and the second baffle 33 will form a mechanical lock through contour interference, eliminating the risk of the wiring harness detaching due to vibration or pulling during the test, and ensuring the stability of the electrical connection. After the test at this station is completed, the operator presses the push plate 6, compressing the torsion spring 8 again. The locking plate 7 then falls and disengages from the limit of the second baffle 33, allowing the wiring harness 4 to be easily pulled out, completing the wire harness retrieval.

[0050] If it is necessary to switch to the next wiring hole 3 for testing, the operator pulls the wiring tube 4 horizontally. The outer wall of the wiring tube 4 will push the rotating plate 24, causing the rotating plate 24 to rotate around the bottom pivot point of the fixed plate 1 9 and deflect towards the fixed plate 2 10. The rotating plate 24 pushes the sliding block 13 through the connecting plate 3 25, sliding along the fixed shaft 11 towards the fixed plate 2 10, and simultaneously compressing the spring 1 12; the connecting plate 1 14 on the front side of the sliding block 13 moves together, causing the force plate 20 of the transmission component to shift, so that the transmission belt 17 rotates around the pulley 1 16 and the pulley 2 19.

[0051] The transmission plate 21 at the bottom of the transmission belt 17 is synchronously linked, and pushes the force shaft 23 through the connecting plate 22, driving the telescopic plate 31 to move upward, thereby causing the housing 26 to rotate around the bottom pivot point of the fixed plate 10 and rise towards the fixed plate 9. During this process, the telescopic plate 31 will contact the outer wall of the wiring pipe 4. The thrust of the wiring pipe 4 forces the telescopic plate 31 to compress the spring 29, causing the limiting plate 30 to slide downward along the limiting rod 28 in the cavity 27, so that the telescopic plate 31 temporarily retracts into the housing 26 to avoid obstructing the lateral movement of the wiring pipe 4.

[0052] After the wiring harness aligns with the next wiring hole 3, the rebound force of spring 12 pushes the sliding block 13 to slide in the opposite direction. Through the linkage of connecting plate 3 25 and the transmission assembly, the receiving shell 26 and the rotating plate 24 are synchronously reset. At the same time, the wiring harness 4 no longer presses against the telescopic plate 31, and the rebound force of spring 29 drives the limiting plate 30 to move upward, causing the telescopic plate 31 to reset and rise. Finally, the rotating plate 24 and the telescopic plate 31 are positioned. Only when the wiring harness 4 and the wiring hole 3 are completely aligned will they completely reset and lock, ensuring the accuracy of the workstation switching. Subsequent testing processes repeat the above steps to achieve automatic switching and stable testing of multiple workstations.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 testing device for automotive wiring harnesses, comprising a testing device (1), characterized in that: The detection device (1) is fixedly connected to a mounting plate (2) on its rear side. Multiple wiring holes (3) are provided on the rear side of the detection device (1). A wiring tube (4) is installed inside the mounting plate (2). Multiple baffles (33) are fixedly connected to the top of the mounting plate (2). A locking assembly is provided on the top of the wiring tube (4). Multiple fixing plates (9) and multiple fixing plates (10) are fixedly connected to the bottom of the mounting plate (2). A fixing shaft (11) is fixedly connected to the adjacent side of the fixing plates (9) and (10). A spring (12) is sleeved on the outside of the fixing shaft (11). A sliding block (13) is slidably connected to the outside of the shaft (11). A connecting plate (14) is fixedly connected to the front side of the sliding block (13). A transmission assembly is fixedly connected to the rear side of the detection device (1). A force-bearing shaft (23) is rotatably connected to the bottom of the transmission assembly. A rotating plate (24) is rotatably connected to the bottom of the fixed plate (9). A connecting plate (25) is rotatably connected to the bottom of the sliding block (13). A receiving shell (26) is rotatably connected to the bottom of the fixed plate (10). A telescopic plate (31) is provided inside the receiving shell (26). A plurality of baffles (32) are fixedly connected to the top of the detection device (1).

2. The testing device for automotive wiring harnesses according to claim 1, characterized in that: The locking assembly includes a push plate (6) and a locking plate (7). The top of the wiring tube (4) is provided with a groove (5). The push plate (6) is rotatably connected to the front side of the inside of the groove (5). The locking plate (7) is fixedly connected to the top of the push plate (6). A torsion spring (8) is provided at the bottom of the push plate (6). The other end of the torsion spring (8) is fixedly connected to the bottom inner wall of the groove (5).

3. The testing device for automotive wiring harnesses according to claim 1, characterized in that: The transmission assembly includes multiple fixed posts one (15) and multiple fixed posts two (18). The front sides of the multiple fixed posts one (15) and multiple fixed posts two (18) are fixedly connected to the rear side of the detection device (1). A pulley one (16) is fixedly connected to the outside of the fixed post one (15). A transmission belt (17) is sleeved on the outside of the pulley one (16). A pulley two (19) is fixedly connected to the outside of the fixed post two (18). The inside side of the transmission belt (17) is sleeved on the outside of the pulley two (19). A force plate (20) is fixedly connected to the top of the transmission belt (17). A transmission plate (21) is fixedly connected to the bottom of the transmission belt (17). A connecting plate two (22) is rotatably connected to the bottom of the transmission plate (21).

4. The testing device for automotive wiring harnesses according to claim 1, characterized in that: The housing (26) is provided with a telescopic assembly, which includes two limiting rods (28) and two springs (29). The housing (26) has a cavity (27) inside. The two limiting rods (28) are fixedly connected to the front and rear sides of the cavity (27) respectively. The springs (29) are sleeved on the outside of the limiting rods (28). The two limiting rods (28) are slidably connected to the outside of the limiting plate (30). The top of the telescopic plate (31) is fixedly connected to the bottom of the limiting plate (30).

5. The testing device for automotive wiring harnesses according to claim 4, characterized in that: One end of the second spring (29) is fixedly connected to the outside of the limiting plate (30), and the other end of the second spring (29) is fixedly connected to the top inner wall of the cavity (27). The outside of the limiting plate (30) is slidably connected to the inside of the cavity (27).

6. The testing device for automotive wiring harnesses according to claim 3, characterized in that: The bottom of the second connecting plate (22) is rotatably connected to the outside of the force-bearing shaft (23), and the other side of the first connecting plate (14) is fixedly connected to the outside of the force-bearing plate (20).

7. The testing device for automotive wiring harnesses according to claim 1, characterized in that: One end of the spring (12) is fixedly connected to the outside of the fixed plate (10), and the other end of the spring (12) is fixedly connected to the outside of the sliding block (13). The bottom of the rotating plate (24) is in contact with the outside of the baffle (32).

8. The testing device for automotive wiring harnesses according to claim 1, characterized in that: The external force shaft (23) is fixedly connected to the external side of the telescopic plate (31), and the other side of the connecting plate three (25) is rotatably connected to the external side of the rotating plate (24).

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