Durability fatigue test machine for wire harness production

Abstract

The invention discloses an endurance fatigue test machine for wire harness production, which comprises a control cabinet and a mounting platform mounted above the control cabinet, a supporting vertical plate is fixed in the middle of the upper part of the mounting platform, and a first connecting frame is arranged in a groove formed in the supporting vertical plate in a penetrating manner; the upper portion of the first connecting frame is connected with the output end of an electric push rod installed in a groove formed in the supporting vertical plate, the front side and the rear side of the first connecting frame are connected with stretching torsion wheel assemblies correspondingly, and lower locking blocks are symmetrically fixed to the positions, corresponding to the front side and the rear side of the supporting vertical plate, of the installation platform correspondingly. Upper locking blocks are connected to the front side and the rear side of the supporting vertical plate correspondingly. The endurance fatigue test machine for wire harness production can perform endurance fatigue test on two different wire harnesses at the same time, and does not need to test the wire harnesses one by one, so that the test efficiency of the endurance fatigue test machine is improved, the test workload is reduced, and different test requirements are met.

Description

Technical Field

[0001] The invention relates to the technical field of fatigue testing, in particular to a durability fatigue testing machine for wire harness production. Background Art

[0002] After the production and processing of the wire harness is completed, it is necessary to use a durability fatigue test machine to repeatedly bend and twist the wire harness, simulating various mechanical stresses that the wire harness may encounter during actual use, so as to test whether the wire harness production is qualified; For example, the patent name disclosed in the prior art with the announcement number "CN215004771U" is "A quick-plug wire harness torsional fatigue durability test device", which discloses that first one end of the wire head is fixed by a fixture, and then the corresponding part of the wire is fixed by the lower fixture and the upper fixture. At this time, the reduction motor is operated to drive the torque sensor and the fixture to rotate, so as to realize the function of twisting the wire harness and obtain fatigue durability data. The cylinder is operated to drive the upper fixture up and down, and the different thickness parts of the wire are clamped and fixed. By running the drive motor to drive the long screw to rotate, the connected screw hole slider can be moved left and right in the strip groove, so as to achieve the effect of changing the placement position of the connected movable carrier plate, which is convenient for changing the clamping and fixing position of the wire part, and is beneficial for different length parts of the same wire. Torsion test, for example, the patent name disclosed in the prior art with the announcement number "CN212159425U" is "A tension fatigue durability test device for cables and ropes", which discloses that the device is assembled, one end of the wire harness or rope is connected to the pulley, and the other end passes through the clamp and is connected to the load hoist, and the load hoist is suspended in the air. At this time, the wire harness or rope is in a taut state, and the operator sets the pulley sliding speed and the number of fatigue durability tests through the control device, starts the rotating motor, and the rotating motor drives the pulley to move on the slide rail, driving the wire harness or rope to perform a vertical tension fatigue test. During the test, the wire harness or rope works together through the clamp, the wire harness connecting device and the movable support rod to reduce the influence of the swing of the wire harness or rope caused by the pulley movement on the wire harness or rope in the vertical direction.

[0003] When the durability fatigue test machine in the above-mentioned prior art is in use, since only one set of pulleys and slide rails is provided, fatigue durability testing can only be performed on one wiring harness at a time. When fatigue durability testing is required for another wiring harness, the original wiring harness can only be disassembled and replaced after the test is completed. In this way, when a plurality of different wiring harnesses need to be comparatively tested, they need to be tested one by one, resulting in a long test time, which in turn makes the test efficiency of the durability fatigue test machine slow and increases the test workload. Therefore, we propose a durability fatigue test machine for wiring harness production to solve the above-mentioned problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a durability fatigue test machine for wire harness production, so as to solve the problem proposed in the above background technology that the durability fatigue test machine currently on the market needs to test multiple wire harnesses one by one, resulting in a long testing time, which in turn makes the testing efficiency of the durability fatigue test machine slow and increases the testing workload.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a durability fatigue test machine for wire harness production, comprising a control cabinet and an installation platform installed above the control cabinet, and a support vertical plate is fixed at the upper middle position of the installation platform, a first connecting frame is provided through the groove opened inside the support vertical plate, and the upper part of the first connecting frame is connected to the output end of the electric push rod installed in the groove opened inside the support vertical plate, and the front and rear sides of the first connecting frame are connected to the stretching and twisting wheel assembly, and the lower locking blocks are symmetrically fixed on the corresponding installation platforms on the front and rear sides of the support vertical plate, and the front and rear sides of the support vertical plate are connected to the upper locking blocks.

[0006] Preferably, a second connecting frame is provided through the groove provided in the lower inner portion of the supporting vertical plate, and upper locking blocks are installed on both the front and rear sides of the second connecting frame, and the upper locking blocks form a lifting structure through the second connecting frame.

[0007] Through the arrangement of the above structure, the upper locking block can automatically descend and cooperate with the lower locking block to clamp and fix the two ends of the wire harness, which is convenient to operate and saves time and effort.

[0008] Preferably, a bidirectional screw is installed through the corresponding supporting vertical plate below the second connecting frame, and two groups of connecting blocks are symmetrically threaded on the outer side of the bidirectional screw, with two being provided in each group. A connecting rod is rotatably connected to the top of the connecting block, 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.

[0009] By setting the above structure, the two sets of second connecting frames can be controlled to rise and fall synchronously at the same time.

[0010] Preferably, vertical rods are rotatably installed inside the front and rear sides of the first connecting frame, the bottom end of the vertical rod is fixedly installed with the stretching and twisting wheel assembly, the upper outer side of the vertical rod is nested and connected with the first vortex spring, and the upper outer side of the vertical rod is wrapped with a first adjustment rope located above the first vortex spring, and the lower end of the first adjustment rope is connected to the corresponding upper locking block below through a guide wheel.

[0011] Through the arrangement of the above structure, the first adjustment rope can automatically drive the vertical rod to rotate after being pulled, so that the vertical rod drives the tensile torsion wheel assembly to rotate, thereby performing a torsional fatigue test on the wiring harness.

[0012] Preferably, sleeve assemblies are installed on both the front and rear side surfaces of the support vertical plate through a fixing frame, the interior of the sleeve assembly is hollow, and a nozzle is installed on the inner side wall of the sleeve assembly.

[0013] Preferably, the bottom ends of the four sets of sleeve assemblies are connected through an infusion tube assembly, and the middle portion of the infusion tube assembly passes through the interior of the supporting vertical plate.

[0014] Through the arrangement of the above structure, the infusion tube assembly can transport the liquid to the interior of the four sets of sleeve tube assemblies.

[0015] Preferably, the sleeve assembly is arranged below the stretching and twisting wheel assembly, and the two sets of sleeve assemblies are symmetrically arranged about the vertical center line of the stretching and twisting wheel assembly.

[0016] Preferably, a collecting trough located below the sleeve assembly is symmetrically provided on the upper surface of the mounting platform, and a pipe with one end inserted into the collecting trough is passed through both the front and rear side surfaces of the mounting platform.

[0017] 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 through a sealed bearing, and the interiors of the upper sleeve and the lower sleeve are both hollow and connected, and nozzles are installed on the inner walls of the upper sleeve and the lower sleeve, and the lower outer side of the lower sleeve is connected to the support vertical plate through a fixed frame, and the lower outer side of the upper sleeve is nested and connected with a second vortex spring, and the upper outer side of the upper sleeve is wrapped with a second adjusting rope, and the upper end of the second adjusting rope is connected to the side of the first connecting frame through a guide wheel.

[0018] Through the arrangement of the above structure, the upper sleeve can be automatically driven to rotate in the opposite direction by the stored force of the second vortex spring in the later stage, so that the second adjustment rope is wound around the outside of the upper sleeve for the next use.

[0019] Preferably, the upper sleeve forms a rotating structure through the second adjustment rope, and the bottom ends of the four groups of lower sleeves are connected through the infusion tube assembly.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the durability fatigue test machine for wire harness production can perform durability fatigue tests on two different wire harnesses at the same time, without having to test them one by one, thereby improving the testing efficiency of the durability fatigue test machine and reducing the testing workload. The specific contents are as follows: By passing the first connecting frame through the interior of the supporting vertical plate, the tensile torsion wheel assemblies installed at the front and rear ends of the first connecting frame can simultaneously perform endurance fatigue tests on two different wiring harnesses without having to test them one by one, thereby improving the testing efficiency of the endurance fatigue test machine and reducing the testing workload; By connecting the two-way screw rod and the connecting block, the two sets of second connecting frames can be controlled by the connecting rod to rise and fall simultaneously, and then the two sets of second connecting frames can simultaneously control the synchronous rise and fall of the four upper locking blocks. Therefore, the two ends of the two wire harnesses can be clamped and released at the same time, which is convenient to operate, saves time and effort, and further improves the test efficiency. After the first connecting frame drives the stretching and twisting wheel assembly to rise to a certain height, the wiring harness can be subjected to a tensile fatigue test. At the same time, the vertical rod can be automatically driven to rotate by the pulled first adjusting rope, thereby causing the vertical rod to drive the stretching and twisting wheel assembly to rotate, making it easier for the stretching and twisting wheel assembly to twist the two ends of the wiring harness into a twist shape. Therefore, the wiring harness can be subjected to a torsional fatigue test to meet different testing requirements. The sleeve assembly, which is hollow inside and has a nozzle installed on the inner wall, can spray 5% NaCl solution into atomized form onto the outside of the wiring harness, and then the wiring harness can be subjected to a salt spray test to test the chemical corrosion resistance of the wiring harness. Furthermore, the second adjusting rope is pulled by the rising first connecting frame, so that the second adjusting rope drives the upper sleeve to rotate, thereby improving the uniformity of the nozzle spraying on the inner wall of the upper sleeve, and then improving the accuracy of the chemical corrosion test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a rear view structural diagram of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the second connecting frame of the present invention; Figure 4 This is a schematic diagram of the bidirectional screw rod structure from a bottom view of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the first connecting frame of the present invention; Figure 6 This is a schematic diagram of the top view of the casing assembly of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the stretching and twisting wheel assembly of the present invention after rising and rotating; Figure 8 Schematic diagram of the connection structure between the sleeve assembly and the support riser in the second embodiment of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the sleeve assembly in the second embodiment of the present invention; Figure 10 This is a schematic diagram of the upper casing and lower casing separation structure in Example 2 of the present invention.

[0022] In the figure: 1. Control cabinet; 2. Mounting platform; 3. Support vertical plate; 4. Lower locking block; 5. Upper locking block; 6. Collecting trough; 7. Bidirectional screw; 8. First connecting frame; 9. Electric push rod; 10. Stretch-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 vortex spring; 18. Infusion tube assembly; 19. Second vortex spring; 20. Second adjusting rope; 21. Fixing frame. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1-10 , the present invention provides the following technical solutions: Example 1: The endurance fatigue test machine for wire harness production in this embodiment can simultaneously perform comparative tests on two wire harnesses of different materials and the same diameter, thereby improving the test efficiency and reducing the test workload. Figure 1-Figure 7As shown, it includes a control cabinet 1 and a mounting platform 2 installed above it, and a supporting vertical plate 3 is fixed at the upper middle position of the mounting platform 2, and a first connecting frame 8 is provided through the groove opened inside the supporting vertical plate 3, and the top of the first connecting frame 8 is connected to the output end of the electric push rod 9 installed in the groove opened inside the supporting vertical plate 3, and the front and rear sides of the first connecting frame 8 are connected to the stretching and twisting wheel assembly 10, and the lower locking blocks 4 are symmetrically fixed on the mounting platforms 2 corresponding to the front and rear sides of the supporting vertical plate 3, and the front and rear sides of the supporting vertical plate 3 are connected to the upper locking blocks 5, and the second connecting frame 12 is provided through the groove opened inside the lower part of the supporting vertical plate 3, and the upper locking blocks 5 are installed on the front and rear sides of the second connecting frame 12, and the upper locking blocks 5 form a lifting structure through the second connecting frame 12. A bidirectional screw rod 7 is installed through the corresponding supporting vertical plate 3 below the second connecting frame 12, and two groups of connecting blocks 13 are symmetrically threaded on the outer side of the bidirectional screw rod 7, each group is provided with two, and a connecting rod 14 is rotatably connected above the connecting block 13, and 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, and a vertical rod 15 is rotatably installed inside the front and rear sides of the first connecting frame 8. The bottom end of the vertical rod 15 is fixedly installed with the stretching and twisting wheel assembly 10, and the upper outer side of the vertical rod 15 is nested and connected to the first vortex spring 17, and the upper outer side of the vertical rod 15 is wrapped with a first adjusting rope 16 located above the first vortex spring 17, and the lower end of the first adjusting rope 16 is connected to the corresponding upper locking block 5 below through a guide wheel.

[0025] After the middle positions of the two wiring harnesses are respectively hung on the two stretching and twisting wheel assemblies 10 on the front and rear sides of the support vertical plate 3, the two ends of the two wiring harnesses are respectively placed on the four groups of lower locking blocks 4 on the front and rear sides of the support vertical plate 3, and then the bidirectional screw rod 7 is manually rotated. When the bidirectional screw rod 7 rotates, it drives the two connecting blocks 13 in the two groups of connecting blocks 13 with outer thread connections to move toward each other, and then the connecting blocks 13 drive the two groups of second connecting frames 12 to move downward at the same time through the connecting rod 14, and 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, through the cooperation of the four groups of lower locking blocks 4 and the upper locking blocks 5, the two ends of two different wiring harnesses can be clamped and fixed at the same time.

[0026] Then the electric push rod 9 is started, and the output end of the electric push rod 9 drives the first connecting frame 8 to move upward, and then the first connecting frame 8 drives the two stretching and twisting wheel assemblies 10 to pull the two wiring harnesses upward, thereby performing a tensile fatigue test on the wiring harness. At the same time, when the first connecting frame 8 rises to a certain height position, after the first adjusting rope 16 with a certain length reserved for 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 vortex spring 17 accumulates force, and the vertical rod 15 drives the stretching and twisting wheel assembly 10 to rotate, so that when the stretching and twisting wheel assembly 10 rotates, the two end areas of the wiring harness can be twisted together into a twist shape, so that the wiring harness can be subjected to a torsional fatigue test. At the same time, when the two end areas of the wiring harness are twisted into a twist shape, the wiring harness on the outside of the stretching and twisting wheel assembly 10 is tightly in contact with the outside of the stretching and twisting wheel assembly 10, which is convenient for performing a bending fatigue test on the wiring harness area that is tightly in contact with the outside of the stretching and twisting wheel assembly 10, thereby meeting different test requirements and improving the efficiency of the test.

[0027] Example 2: The endurance fatigue test machine for wire harness production in this embodiment can perform salt spray test on wire harness based on Example 1 to test the chemical corrosion resistance of wire harness. Figure 6-Figure 7 As shown, the front and rear sides of the support vertical plate 3 are both equipped with a sleeve assembly 11 through a fixing frame 21, and the interior of the sleeve assembly 11 is hollow, and a nozzle is installed on the inner wall of the sleeve assembly 11. The bottom ends of the four groups of sleeve assemblies 11 are connected through an infusion tube assembly 18, and the middle position of the infusion tube assembly 18 passes through the interior of the support vertical plate 3. The sleeve assembly 11 is arranged below the stretching and twisting wheel assembly 10, and the two groups of sleeve assemblies 11 are symmetrically arranged about the vertical center line of the stretching and twisting wheel assembly 10. The upper surface of the mounting platform 2 is symmetrically provided with a collecting tank 6 located below the sleeve assembly 11, and the front and rear sides of the mounting platform 2 are penetrated by a pipe with one end inserted into the collecting tank 6. First, pass the two ends of the wire harness through the inner of the sleeve assembly 11. The parts are clamped and fixed as shown in Example 1, and then the front end of the infusion tube assembly 18 is connected to the external conveying mechanism. Then, when the first connecting frame 8 rises, the external conveying mechanism is started, and the external 5% NaCl solution enters the four groups of hollow sleeve assemblies 11 through the infusion tube assembly 18. Then, the 5% NaCl solution is atomized and sprayed to the outside of the wiring harness through the nozzle on the inner wall of the sleeve assembly 11. Therefore, the wiring harness can be subjected to a salt spray test. Later, by observing the corrosion condition of the outer side of the wiring harness, the wiring harness can be tested for chemical corrosion resistance to determine whether the corrosion resistance of the wiring 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.

[0028] Example 3: The endurance fatigue test machine for wire harness production in this embodiment, based on Example 2, discloses another structure of the sleeve assembly 11, which can further improve the uniformity of the 5% NaCl solution atomized sprayed onto the outside of the wire harness, thereby improving the accuracy of the chemical corrosion test. For the specific structure, please refer to the attached Figures 8-10 As shown, the sleeve assembly 11 includes an upper sleeve 111 and a lower sleeve 112. The lower side of the upper sleeve 111 is connected to the lower sleeve 112 through a sealed bearing. At the same time, the interiors of the upper sleeve 111 and the lower sleeve 112 are both hollow and connected. Spray nozzles are installed on the inner side walls of 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 through a fixing frame 21. The lower outer side of the upper sleeve 111 is nested with a second vortex spring 19. The upper outer side of the upper sleeve 111 is wrapped with a second adjusting rope 20. The upper The end is connected to the side of the first connecting frame 8 through a guide wheel, and the upper sleeve 111 forms a rotating structure through the second adjusting rope 20, and the bottom ends of the four groups of lower sleeves 112 are connected through the infusion tube assembly 18. When the first connecting frame 8 rises, the first connecting frame 8 pulls the second adjusting rope 20, and the second adjusting rope 20 drives the upper sleeve 111 to rotate. Therefore, through the rotation of the upper sleeve 111, the nozzle on the inner wall can atomize the 5% NaCl solution and spray it evenly onto the outer side of the wiring harness, thereby improving the accuracy of the chemical corrosion test, thereby completing a series of tasks.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A durability fatigue test machine for wire harness production, comprising a control cabinet (1), and a mounting platform (2) mounted above the control cabinet, wherein a support vertical plate (3) is fixed at the upper middle position of the mounting platform (2), characterized in that: A first connecting frame (8) is provided through the groove opened inside the supporting vertical plate (3), and the upper portion of the first connecting frame (8) is connected to the output end of the electric push rod (9) installed in the groove opened inside the supporting vertical plate (3), and the front and rear sides of the first connecting frame (8) are both connected to the stretching and twisting wheel assembly (10), and lower locking blocks (4) are symmetrically fixed on the corresponding mounting platforms (2) on the front and rear sides of the supporting vertical plate (3), and upper locking blocks (5) are both connected to the front and rear sides of the supporting vertical plate (3).

2. The durability fatigue test machine for wire harness production according to claim 1, characterized in that: A second connecting frame (12) is provided through a groove provided in the interior of the lower support vertical plate (3), and upper locking blocks (5) are installed on both the front and rear sides of the second connecting frame (12), and the upper locking blocks (5) form a lifting structure through the second connecting frame (12).

3. The durability fatigue test machine for wire harness production according to claim 2, characterized in that: A bidirectional screw rod (7) is installed through the supporting vertical plate (3) corresponding to the lower portion of the second connecting frame (12), and two groups of connecting blocks (13) are symmetrically threadedly connected to the outer side of the bidirectional screw rod (7), with each group having two connecting blocks. A connecting rod (14) is rotatably connected to the upper portion of the connecting block (13), and 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).

4. The durability fatigue test machine for wire harness production according to claim 1, characterized in that: A vertical rod (15) is rotatably installed inside both the front and rear sides of the first connecting frame (8), the bottom end of the vertical rod (15) is fixedly installed with the stretching and twisting wheel assembly (10), the upper outer side of the vertical rod (15) is nested and connected with a first vortex spring (17), and the upper outer side of the vertical rod (15) is wrapped and connected with a first adjustment rope (16) located above the first vortex spring (17), and the lower end of the first adjustment rope (16) is connected to the corresponding upper locking block (5) below through a guide wheel.

5. The durability fatigue test machine for wire harness production according to claim 1, characterized in that: The front and rear sides of the support vertical plate (3) are both mounted with sleeve assemblies (11) via a fixing frame (21), the interior of the sleeve assembly (11) is hollow, and a nozzle is mounted on the inner side wall of the sleeve assembly (11).

6. The endurance fatigue test machine for wire harness production according to claim 5, characterized in that: The bottom ends of the four sets of sleeve assemblies (11) are connected via a liquid infusion tube assembly (18), and the middle portion of the liquid infusion tube assembly (18) passes through the interior of the supporting vertical plate (3).

7. The durability fatigue test machine for wire harness production according to claim 5, characterized in that: The sleeve assembly (11) is arranged below the stretching and twisting wheel assembly (10), and the two sets of sleeve assemblies (11) are symmetrically arranged about the vertical center line of the stretching and twisting wheel assembly (10).

8. The endurance fatigue test machine for wire harness production according to claim 5, characterized in that: The upper surface of the mounting platform (2) is symmetrically provided with a collecting tank (6) located below the sleeve assembly (11), and the front and rear side surfaces of the mounting platform (2) are both penetrated by a pipe with one end inserted into the collecting tank (6).

9. The endurance fatigue test machine for wire harness production according to claim 5, characterized in that: The sleeve assembly (11) includes an upper sleeve (111) and a lower sleeve (112). The lower portion of the upper sleeve (111) is connected to the lower sleeve (112) via a sealed bearing. The interiors of the upper sleeve (111) and the lower sleeve (112) are both hollow and connected. Spray nozzles are installed on the inner side walls of 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 frame (21). The lower outer side of the upper sleeve (111) is nested with a second vortex spring (19). The upper outer side of the upper sleeve (111) is wound with a second adjustment rope (20). The upper end of the second adjustment rope (20) is connected to the side of the first connecting frame (8) via a guide wheel.

10. The endurance fatigue test machine for wire harness production according to claim 9, characterized in that: The upper sleeve (111) forms a rotating structure through the second adjustment rope (20), and the bottom ends of the four groups of lower sleeves (112) are connected through the infusion tube assembly (18).

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