A durable fatigue test testing machine for wire harness production

Abstract

The application discloses a kind of harness production with durable fatigue test testing machine, including control cabinet, and installation platform is installed above it, and the upper middle position of installation platform is fixed with support vertical plate, the first connecting frame is arranged in the groove inside the support vertical plate, and the output end of electric push rod installed in the groove inside the support vertical plate is connected with the upper side of the first connecting frame, and the front and rear sides of the first connecting frame are connected with stretch torsion wheel assembly, and the front and rear sides of support vertical plate are symmetrically fixed with lower locking block on the corresponding installation platform, and the front and rear sides of support vertical plate are connected with upper locking block.The harness production with durable fatigue test testing machine can simultaneously test the durability of two different harnesses, without testing one by one, thereby improving the testing efficiency of the durable fatigue test testing machine, reducing the testing workload, and meeting different testing needs.

Description

Technical Field

[0001] This invention relates to the field of fatigue testing technology, specifically a durability fatigue testing machine for wire harness production. Background Technology

[0002] After the wire harness is manufactured, it needs to be subjected to repeated bending and twisting operations using a durability fatigue testing machine. This simulates the various mechanical stresses that the wire harness may encounter during actual use, and tests whether the wire harness production is qualified.

[0003] For example, the patent disclosed in the prior art with publication number "CN215004771U" is entitled "A Quick-Connect Wire Harness Torsional Fatigue Durability Testing Device." It discloses that one end of the wire is first fixed by a tooling fixture, and then the corresponding part of the wire is fixed by a lower and upper fixture. At this time, a reduction motor drives a torque sensor and the tooling fixture to rotate, realizing the torsion function of the wire harness and acquiring fatigue durability data. A cylinder drives the upper fixture to move up and down, using the clamping and fixing of different thicknesses of the wire. A drive motor drives a long screw to rotate, which can move the connected screw hole slider left and right within the strip groove, achieving the effect of changing the placement position of the connected moving carrier plate. This facilitates changing the clamping and fixing position of the wire portion and is beneficial for testing different lengths of the same wire. Torsion testing, such as the patent titled "A Tension Fatigue Durability Testing Device for Cables and Ropes" disclosed in the prior art with publication number "CN212159425U", discloses that after assembling the device, one end of the wire harness or rope is connected to a pulley, and the other end passes through a retaining ring and is connected to a load. The load is suspended in the air, and at this time the wire harness or rope is in a taut state. The operator sets the sliding speed of the pulley and the number of fatigue durability tests through the control device, starts the rotary motor, and the rotary motor drives the pulley to move on the slide rail, driving the wire harness or rope to perform a tension fatigue test in the vertical direction. During the test, the wire harness or rope, through the combined action of the retaining ring, the wire harness connecting device, and the movable support rod, reduces the impact of the swing of the wire harness or rope caused by the movement of the pulley on the wire harness or rope in the vertical direction.

[0004] The existing durability fatigue testing machine described above only has one set of pulleys and slide rails, which means it can only perform fatigue durability testing on one wire harness at a time. When a fatigue durability test is needed on another wire harness, it can only be replaced after the original wire harness has been tested. Therefore, when multiple different wire harnesses need to be tested for comparison, they need to be tested one by one, which results in a long testing time. Consequently, the testing efficiency of the durability fatigue testing machine is slow, and the testing workload is increased. Therefore, we propose a durability fatigue testing machine for wire harness production to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a durability fatigue testing machine for wire harness production, in order to solve the problem mentioned in the background art that the current durability fatigue testing machines on the market need to test multiple wire harnesses one by one, which results in a long testing time, thus making the testing efficiency of the durability fatigue testing machine slow and increasing the testing workload.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a durability fatigue testing machine for wire harness production, comprising a control cabinet and an installation platform mounted thereon, wherein a support vertical plate is fixed at the upper center of the installation platform, a first connecting frame is provided through a groove opened inside the support vertical plate, and the upper part of the first connecting frame is connected to the output end of an electric push rod installed in the groove opened inside the support vertical plate, and tension torsion wheel assemblies are connected to both the front and rear sides of the first connecting frame, and lower locking blocks are symmetrically fixed on the corresponding installation platforms on the front and rear sides of the support vertical plate, and upper locking blocks are connected to both the front and rear sides of the support vertical plate.

[0007] Preferably, a second connecting frame is provided through a groove opened inside the lower part of the supporting vertical plate, and upper locking blocks are installed on both the front and rear sides of the second connecting frame. The upper locking blocks form a lifting structure through the second connecting frame.

[0008] The above structure allows the upper locking block to automatically descend and cooperate with the lower locking block to clamp and fix both ends of the wire harness, making the operation convenient, time-saving, and labor-saving.

[0009] Preferably, a bidirectional lead screw is installed through the corresponding support vertical plate below the second connecting frame. Two sets of connecting blocks are symmetrically threaded to the outer side of the bidirectional lead screw, with two blocks in each set. A connecting rod is rotatably connected above the connecting blocks, and the upper end of the connecting rod is rotatably connected to the bottom surface of the second connecting frame. The second connecting frame forms a lifting structure through the connecting rod.

[0010] With the above structure, the two sets of second connecting frames can be controlled to rise and fall synchronously.

[0011] Preferably, vertical rods are rotatably mounted through the interior of both the front and rear sides of the first connecting frame. The bottom end of the vertical rod is fixedly mounted to the tension torsion wheel assembly. A first spiral spring is nested and connected to the upper outer side of the vertical rod, and a first adjusting rope located above the first spiral spring is wound and connected to the upper outer side of the vertical rod. The lower end of the first adjusting rope is connected to the corresponding upper locking block below through a guide wheel.

[0012] With the above structure, the first adjusting rope can be pulled to automatically drive the vertical rod to rotate, which in turn drives the tension torsion wheel assembly to rotate, thus effectively performing torsional fatigue testing on the wire harness.

[0013] Preferably, the front and rear sides of the supporting vertical plate are equipped with sleeve assemblies by fixing brackets, the sleeve assemblies are hollow inside, and the inner sidewalls of the sleeve assemblies are equipped with nozzles.

[0014] Preferably, the bottom ends of the four sets of cannula assemblies are connected by an infusion tube assembly, and the middle part of the infusion tube assembly penetrates the interior of the supporting vertical plate.

[0015] The above structure allows the infusion tubing assembly to deliver liquid into the interior of the four sets of tubing assemblies.

[0016] Preferably, the sleeve assembly is disposed below the tension torsion wheel assembly, and the two sets of sleeve assemblies are symmetrically arranged about the vertical center line of the tension torsion wheel assembly.

[0017] Preferably, the upper surface of the installation platform is symmetrically provided with collection grooves located below the sleeve assembly, and both the front and rear sides of the installation platform are connected through a pipe with one end inserted into the collection groove.

[0018] Preferably, the sleeve assembly includes an upper sleeve and a lower sleeve. The lower part of the upper sleeve is connected to the lower sleeve via a sealed bearing. Both the upper and lower sleeves are hollow and interconnected. Spray nozzles are installed on the inner walls of both the upper and lower sleeves. The lower outer side of the lower sleeve is connected to a support vertical plate via a fixing bracket. A second spiral spring is nested on the lower outer side of the upper sleeve. A second adjusting rope is wound around the upper outer side of the upper sleeve. The upper end of the second adjusting rope is connected to the side of the first connecting frame via a guide wheel.

[0019] With the above structure, the upper sleeve can be automatically rotated in the opposite direction by the stored force of the second spiral spring, so that the second adjusting rope is wrapped around the outside of the upper sleeve for the next use.

[0020] Preferably, the upper sleeve forms a rotating structure through the second adjusting rope, and the bottom ends of the four sets of lower sleeves are connected through an infusion tube assembly.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the durability fatigue testing machine for wire harness production can simultaneously perform durability fatigue testing on two different wire harnesses, eliminating the need to test them one by one, thereby improving the testing efficiency of the durability fatigue testing machine and reducing the testing workload. The specific details are as follows:

[0022] By passing the first connecting frame through the interior of the supporting vertical plate, the tension and torsion wheel assembly installed at both ends of the first connecting frame can simultaneously perform durability fatigue tests on two different wire harnesses without having to test them one by one, thereby improving the testing efficiency of the durability fatigue testing machine and reducing the testing workload.

[0023] By connecting the bidirectional lead screw and the connecting block, the two sets of second connecting frames can be raised and lowered simultaneously through the connecting rod. In turn, the two sets of second connecting frames can simultaneously control the four upper locking blocks to rise and fall synchronously. Therefore, the two ends of the two wire harnesses can be clamped and released simultaneously. The operation is convenient, time-saving and labor-saving, and further improves the testing efficiency.

[0024] After the first connecting frame drives the tension torsion wheel assembly to a certain height, the wire harness can be subjected to tensile fatigue testing. At the same time, the first adjusting rope that is pulled can automatically drive the vertical rod to rotate, thereby causing the vertical rod to drive the tension torsion wheel assembly to rotate. This makes it easy for the tension torsion wheel assembly to twist the two ends of the wire harness into a twisted shape, thus enabling the wire harness to undergo torsion fatigue testing and meeting different testing requirements.

[0025] The hollow sleeve assembly with nozzles installed on the inner wall can atomize and spray 5% NaCl solution onto the outside of the wire harness, thereby enabling salt spray testing to assess the wire harness's chemical corrosion resistance. Furthermore, by raising the first connecting frame and pulling the second adjusting rope, the second adjusting rope causes the upper sleeve to rotate, which improves the uniformity of the spray from the nozzles on the inner wall of the upper sleeve, thus improving the accuracy of the chemical corrosion test. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0028] Figure 3 This is a three-dimensional structural diagram of the second connecting frame of the present invention;

[0029] Figure 4 This is a schematic diagram of the bidirectional lead screw structure of the present invention from a bottom view;

[0030] Figure 5 This is a three-dimensional structural diagram of the first connecting frame of the present invention;

[0031] Figure 6 This is a top view of the sleeve assembly of the present invention;

[0032] Figure 7 This is a three-dimensional structural diagram of the tension torsion wheel assembly of the present invention after it rises and rotates.

[0033] Figure 8 This is a schematic diagram of the connection structure between the sleeve assembly and the supporting vertical plate in Embodiment 2 of the present invention;

[0034] Figure 9 This is a three-dimensional structural diagram of the sleeve assembly in Embodiment 2 of the present invention;

[0035] Figure 10 This is a schematic diagram of the separation structure of the upper sleeve and the lower sleeve in Embodiment 2 of the present invention.

[0036] In the diagram: 1. Control cabinet; 2. Mounting platform; 3. Supporting vertical plate; 4. Lower locking block; 5. Upper locking block; 6. Collection trough; 7. Two-way lead screw; 8. First connecting frame; 9. Electric push rod; 10. Tension torsion wheel assembly; 11. Sleeve assembly; 111. Upper sleeve; 112. Lower sleeve; 12. Second connecting frame; 13. Connecting block; 14. Connecting rod; 15. Vertical rod; 16. First adjusting rope; 17. First spiral spring; 18. Infusion tube assembly; 19. Second spiral spring; 20. Second adjusting rope; 21. Fixing frame. Detailed Implementation

[0037] 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.

[0038] Please see Figures 1-10 The present invention provides the following technical solution:

[0039] Example 1: The durability fatigue testing machine for wire harness production in this example can simultaneously perform comparative tests on two wire harnesses of different materials but the same diameter, thereby improving testing efficiency and reducing testing workload. See attached document for details. Figures 1-7As shown, the system includes a control cabinet 1 and an installation platform 2 mounted on top of it. A support vertical plate 3 is fixed at the upper center of the installation platform 2. A first connecting frame 8 is installed through a groove inside the support vertical plate 3. The upper part of the first connecting frame 8 is connected to the output end of an electric push rod 9 installed in the groove inside the support vertical plate 3. Tension torsion wheel assemblies 10 are connected to both the front and rear sides of the first connecting frame 8. Lower locking blocks 4 are symmetrically fixed on the installation platform 2 on the front and rear sides of the support vertical plate 3. Upper locking blocks 5 are connected to both the front and rear sides of the support vertical plate 3. A second connecting frame 12 is installed through a groove inside the lower part of the support vertical plate 3. Upper locking blocks 5 are installed on both the front and rear sides of the second connecting frame 12. The upper locking blocks 5 form a lifting structure through the second connecting frame 12. A bidirectional lead screw 7 is installed through the support vertical plate 3 below the second connecting frame 12. Two sets of connecting blocks 13 are symmetrically threaded to the outer side of the bidirectional lead screw 7, with two blocks in each set. A connecting rod 14 is rotatably connected above the connecting block 13. The upper end of the connecting rod 14 is rotatably connected to the bottom surface of the second connecting frame 12. The second connecting frame 12 forms a lifting structure through the connecting rod 14. Vertical rods 15 are rotatably installed through the front and rear sides of the first connecting frame 8. The bottom end of the vertical rod 15 is fixedly installed to the tension torsion wheel assembly 10. A first spiral spring 17 is nested and connected to the upper outer side of the vertical rod 15. A first adjusting rope 16 located above the first spiral spring 17 is wound and connected to the upper outer side of the vertical rod 15. The lower end of the first adjusting rope 16 is connected to the corresponding upper locking block 5 below through the guide wheel.

[0040] After suspending the middle of the two wire harnesses on the two tension torsion wheel assemblies 10 on the front and rear sides of the support vertical plate 3, the two ends of the two wire harnesses are placed on the four sets of lower locking blocks 4 on the front and rear sides of the support vertical plate 3. Then, the bidirectional screw 7 is manually rotated. When the bidirectional screw 7 rotates, it drives two of the two sets of connecting blocks 13 with the outer thread to move towards each other. Then, the connecting blocks 13 drive the two sets of second connecting frames 12 to move downward at the same time through the connecting rod 14. The second connecting frames 12 drive the upper locking blocks 5 at the front and rear ends to move downward and make close contact with the corresponding lower locking blocks 4 below. Therefore, the two ends of two different wire harnesses can be clamped and fixed at the same time through the cooperation of the four sets of lower locking blocks 4 and upper locking blocks 5.

[0041] Next, the electric push rod 9 is activated. The output end of the electric push rod 9 drives the first connecting frame 8 to move upward. Then, the first connecting frame 8 drives the two tension torsion wheel assemblies 10 to pull the two wire harnesses upward, thereby enabling tensile fatigue testing of the wire harnesses. At the same time, when the first connecting frame 8 rises to a certain height, the first adjusting rope 16, which is reserved to a certain length at the lower end, is straightened. The first connecting frame 8 continues to rise and pulls the first adjusting rope 16. At this time, the first adjusting rope 16 drives the vertical rod 15 to rotate, and the first spiral spring 17 stores force. The vertical rod 15 drives the tension torsion wheel assembly 10 to rotate, so that when the tension torsion wheel assembly 10 rotates, it can twist the two ends of the wire harness together into a braid shape. Therefore, torsion fatigue testing of the wire harnesses can be performed. At the same time, when the two ends of the wire harness are twisted into a braid shape, the wire harness on the outside of the tension torsion wheel assembly 10 is in close contact with the outside of the tension torsion wheel assembly 10, which facilitates bending fatigue testing of the wire harness area in close contact with the outside of the tension torsion wheel assembly 10. Therefore, different testing requirements can be met, and the testing efficiency is improved.

[0042] Example 2: The durability fatigue testing machine for wire harness production in this example, based on Example 1, can perform salt spray testing on the wire harness to test its chemical corrosion resistance. See attached diagram for the specific structure. Figures 6-7 As shown, sleeve assemblies 11 are installed on both the front and rear sides of the supporting vertical plate 3 via fixing brackets 21. The sleeve assemblies 11 are hollow inside, and nozzles are installed on the inner sidewalls of the sleeve assemblies 11. The bottom ends of the four sets of sleeve assemblies 11 are connected by infusion tube assemblies 18, and the middle part of the infusion tube assembly 18 penetrates the interior of the supporting vertical plate 3. The sleeve assemblies 11 are located below the tension torsion wheel assembly 10, and the two sets of sleeve assemblies 11 are symmetrically arranged about the vertical center line of the tension torsion wheel assembly 10. The upper surface of the mounting platform 2 is symmetrically provided with collection grooves 6 located below the sleeve assemblies 11, and a pipe with one end inserted into the collection groove 6 is connected to both the front and rear sides of the mounting platform 2. First, the two ends of the wire harness are passed through the inner side of the sleeve assembly 11. The component is then clamped and fixed as shown in Embodiment 1. Next, the front end of the infusion tube assembly 18 is connected to the external delivery mechanism. When the first connecting frame 8 rises, the external delivery mechanism is activated, and the external 5% NaCl solution enters the four hollow sleeve assemblies 11 through the infusion tube assembly 18. Then, the 5% NaCl solution is atomized and sprayed onto the outside of the wire harness through the nozzle on the inner wall of the sleeve assembly 11. Therefore, the wire harness can be subjected to salt spray testing. Later, by observing the corrosion on the outer side of the wire harness, the wire harness can be subjected to chemical corrosion resistance testing to determine whether the corrosion resistance of the wire harness meets the production requirements. The dripping 5% NaCl solution can fall into the collection tank 6 for collection and is later discharged through the pipe outside the collection tank 6 for treatment.

[0043] Example 3: Based on Example 2, the wire harness production durability fatigue testing machine in this example discloses a different structure for the sleeve assembly 11. This further improves the uniformity of the 5% NaCl solution atomized and sprayed onto the outside of the wire harness, thereby improving the accuracy of the chemical corrosion test. The specific structure is shown in the attached diagram. Figures 8-10 As shown, the sleeve assembly 11 includes an upper sleeve 111 and a lower sleeve 112. The lower part of the upper sleeve 111 is connected to the lower sleeve 112 via a sealed bearing. Both the upper sleeve 111 and the lower sleeve 112 are hollow and interconnected. Nozzles are installed on the inner walls of both the upper sleeve 111 and the lower sleeve 112. The lower outer side of the lower sleeve 112 is connected to the support vertical plate 3 via a fixing bracket 21. A second spiral spring 19 is nested on the lower outer side of the upper sleeve 111. A second adjusting rope 20 is wound around the upper outer side of the upper sleeve 111. The upper part of the second adjusting rope 20... The upper sleeve 111 is connected to the side of the first connecting frame 8 via a guide wheel. The upper sleeve 111 forms a rotating structure via the second adjusting rope 20. The bottom ends of the four sets of lower sleeves 112 are connected internally via an infusion tube assembly 18. When the first connecting frame 8 rises, it pulls the second adjusting rope 20, which in turn drives the upper sleeve 111 to rotate. Therefore, the rotation of the upper sleeve 111 allows the nozzle on the inner wall to atomize and evenly spray the 5% NaCl solution onto the outer side of the wire harness, thereby improving the accuracy of the chemical corrosion test and completing a series of tasks.

[0044] 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 durability fatigue testing machine for wire harness production, comprising a control cabinet (1) and a mounting platform (2) mounted thereon, wherein a supporting vertical plate (3) is fixed at the upper center of the mounting platform (2), characterized in that: The slot inside the support vertical plate (3) is provided with a first connecting frame (8) penetratingly arranged, and the upper side of the first connecting frame (8) is connected with the output end of the electric push rod (9) arranged in the slot inside the support vertical plate (3), and the front and rear sides of the first connecting frame (8) are both connected with a stretch and twist wheel assembly (10), and the front and rear sides of the support vertical plate (3) are both provided with a lower locking block (4) fixed symmetrically on the corresponding mounting platform (2), and the front and rear sides of the support vertical plate (3) are both provided with an upper locking block (5), the slot inside the support vertical plate (3) is provided with a second connecting frame (12) penetratingly arranged, and the front and rear sides of the second connecting frame (12) are both provided with an upper locking block (5), and the upper locking block (5) forms a lifting structure through the second connecting frame (12), and the lower side of the second connecting frame (12) is provided with a bidirectional screw rod (7) penetratingly arranged in the support vertical plate (3), and the outer side of the bidirectional screw rod (7) is symmetrically provided with two groups of connecting blocks (13), each group is provided with two connecting blocks (13), and the upper side of the connecting block (13) is rotatably connected with a connecting rod (14), and the upper end of the connecting rod (14) is rotatably connected with the bottom surface of the second connecting frame (12), and the second connecting frame (12) forms a lifting structure through the connecting rod (14).

2. The durable fatigue test tester for wire harness production according to claim 1, characterized by: The front and rear sides of the first connecting frame (8) are both provided with a vertical rod (15) penetratingly and rotatably arranged, the bottom end of the vertical rod (15) is fixedly arranged with the stretch and twist wheel assembly (10), the upper side of the vertical rod (15) is nested with a first vortex spring (17), and the upper side of the vertical rod (15) is wound with a first adjusting rope (16) arranged above the first vortex spring (17), and the lower end of the first adjusting rope (16) is connected with the corresponding upper locking block (5) below through a guide wheel.

3. The durable fatigue test machine for wire harness production of claim 1, wherein: The front and rear sides of the support vertical plate (3) are both provided with a sleeve assembly (11) through a fixing frame (21), the inside of the sleeve assembly (11) is provided in a hollow shape, and the inner side wall of the sleeve assembly (11) is provided with a spray head.

4. The durable fatigue test tester for wire harness production according to claim 3, characterized by: The bottom ends of four groups of sleeve assemblies (11) are connected through a transfusion pipe assembly (18), and the middle part of the transfusion pipe assembly (18) penetrates the inside of the support vertical plate (3).

5. The durable fatigue test tester for wire harness production according to claim 3, characterized by: The sleeve assemblies (11) are arranged below the stretch and twist wheel assembly (10), and two groups of sleeve assemblies (11) are symmetrically arranged about the vertical center line of the stretch and twist wheel assembly (10).

6. The durable fatigue test tester for wire harness production according to claim 3, characterized by: The upper surface of the mounting platform (2) is symmetrically provided with a collecting groove (6) below the sleeve assembly (11), and the front and rear sides of the mounting platform (2) are both provided with a pipeline penetratingly connected with one end inserted into the collecting groove (6).

7. The durable fatigue test tester for wire harness production according to claim 3, characterized by: The sleeve assembly (11) comprises an upper sleeve (111) and a lower sleeve (112), the lower end of the upper sleeve (111) is connected with the lower sleeve (112) through a sealing bearing, the interiors of the upper sleeve (111) and the lower sleeve (112) are hollow and communicated, the inner side walls of the upper sleeve (111) and the lower sleeve (112) are both provided with a spray head, the lower end of the lower sleeve (112) is connected with the supporting vertical plate (3) through a fixing frame (21), the lower end of the outer side of the upper sleeve (111) is embeddedly connected with a second vortex spring (19), the upper end of the outer side of the upper sleeve (111) is woundly connected with a second adjusting rope (20), and the upper end of the second adjusting rope (20) is connected with the side edge of the first connecting frame (8) through a guide wheel.

8. The durable fatigue test tester for wire harness production according to claim 7, characterized by: The upper sleeve (111) is rotatably connected with the second adjusting rope (20), and the interiors of the bottom ends of the four lower sleeves (112) are communicated through the infusion tube assembly (18).

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