A durability testing fixture for electrical wiring harnesses

Abstract

The present invention relates to the technical field of coal paving for railway freight cars, and in particular to a durability testing fixture for electrical wiring harnesses, comprising a support plate, wherein a bidirectional lead screw is rotatably connected inside the support plate, a servo motor is fixedly connected to one side of the support plate, and the servo motor and the bidirectional lead screw are transmission-connected, and a guide slider is symmetrically slidably connected inside the upper surface of the support plate; the present invention increases the pressure between the hollow tube and the telescopic rod and shortens the spacing between the lower pressure arc plate and the supporting arc plate through transmission between gears, which helps to increase the acting force between the electrical wiring harness and the supporting arc plate and the lower pressure arc plate, and indirectly improves the anti-detachment effect of the electrical wiring harness by shortening the spacing in the process of stretching the electrical wiring harness, so as to ensure the accuracy of the test result, and the method of changing the pressure and shortening the spacing can achieve the effect of reinforcing the electrical wiring harness to prevent detachment before testing, and can also achieve the effect of further reinforcing the electrical wiring harness during testing.

Description

Technical Field

[0001] The invention relates to the technical field of coal paving of railway freight cars, and in particular to a durability performance testing fixture for electrical wiring harnesses. Background Art

[0002] A wiring harness is a component that is formed by crimping a contact terminal (connector) made of copper material with wires and cables, and then plasticizing an insulator or adding a metal shell on the outside to form a wiring harness to connect the circuit. The wiring harness industry chain includes wires and cables, connectors, processing equipment, wiring harness manufacturing and downstream application industries. The wiring harness is widely used, so the reliability of the wiring harness is very important, and a large number of tests are required to verify the reliability of the product.

[0003] A fixture is a device used to fix the processing object in the mechanical manufacturing process so that it occupies the correct position to accept construction or testing. However, the fixture can usually only fix wire harnesses of the same specifications. Different fixtures are required to fix wire harnesses of different specifications, which increases the test cost and wastes resources. In addition, when the wire harness is stretched for durability testing, it is very easy for the wire harness to fall off due to excessive stretching, which directly affects the accuracy of the equipment's test results on the durability performance of the wire harness.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The object of the present invention is to provide a durability testing fixture for electrical wiring harnesses to solve the technical defects mentioned above. The present invention uses the transmission between gears to make the upper end of the crank pull rod coaxially pull the lower pressure frame to move toward the inside of the side plate, thereby shortening the distance between the lower pressure arc plate and the supporting arc plate, which helps to indirectly increase the interaction force between the electrical wiring harness and the supporting arc plate and the lower pressure arc plate. In the process of stretching the electrical wiring harness, the electrical wiring harness can be indirectly improved by shortening the distance to prevent it from falling off, so as to ensure the accuracy of the test results. By changing the pressure and shortening the distance, the electrical wiring harness can be reinforced to prevent it from falling off before testing, and the electrical wiring harness can be further reinforced during testing. At the same time, the stability of the clamping of the electrical wiring harness is improved by multi-point clamping, and it is convenient to clamp and position electrical wiring harnesses of different diameters, which helps to increase the scope of use of the fixture.

[0006] The object of the present invention can be achieved through the following technical scheme: a durability performance testing fixture for electrical wiring harnesses, comprising a support plate, the support plate is internally rotatably connected to a bidirectional lead screw, one side of the support plate is fixedly connected to a servo motor, and the servo motor and the bidirectional lead screw are transmission-connected, the upper surface of the support plate is internally symmetrically slidably connected to a guide slider, and the guide slider is located outside the bidirectional lead screw, the upper surface of the guide slider is fixedly connected to a mounting frame, the mounting frame is fixedly connected to a side plate on a side close to the servo motor, a lower pressure frame is slidably inserted in the upper surface of the side plate, the front and rear surfaces of the support plate are both fixedly connected to tooth blocks, the upper surface of the lower pressure frame is fixedly connected to a supporting arc plate, the upper surface of the lower pressure frame is internally fixedly connected to a telescopic member, and one end of the telescopic member close to the supporting arc plate is fixedly connected to the lower pressure arc plate;

[0007] An air duct is fixedly connected to the upper surface of the telescopic member, and a piston box is fixedly connected to one end of the air duct away from the telescopic member. A toothed plate piston is slidably inserted inside the lower surface of the piston box, and one side of the toothed plate piston is meshingly connected to a gear plate.

[0008] Preferably, the mounting frame is fixedly connected to an adjusting motor on a side away from the gear plate, the mounting frame is internally rotatably connected to a positioning worm, and one end of the positioning worm is transmission-connected to the adjusting motor, the front and rear surfaces of the side plate are fixedly connected to a limiting plate, the limiting plate is internally rotatably connected to a double-tooth plate shaft, the upper end of the double-tooth plate shaft is meshingly connected to a traction tooth plate, one end of the upper surface of the traction tooth plate is movably connected to a crank pull rod, the end of the crank pull rod away from the traction tooth plate is rotatably connected to a coaxial shaft, and the coaxial shaft is fixedly connected to the lower pressure frame.

[0009] Preferably, the mounting frame is fixedly connected to a positioning ring inside, the positioning ring is fixedly connected to a guide rail inside, the guide rail is slidably connected to a movable slider inside, the front surface of the movable slider is rotatably connected to a positioning push rod, one side of the movable slider is fixedly connected to a limiting column, the end of the limiting column away from the movable slider is fixedly connected to a clamping plate, the end of the positioning push rod away from the guide rail is rotatably connected to an annular gear plate, and the front surface of the annular gear plate is rotatably connected to the limiting slide rail.

[0010] Preferably, the telescopic member includes a telescopic rod, a hollow tube and a hollow spring, the lower end of the hollow tube is fixedly connected to the lower pressure frame, the upper end of the hollow spring is fixedly connected to the inner top surface of the hollow tube, the lower end of the hollow spring is fixedly connected to the telescopic rod, the upper end of the telescopic rod is slidably connected to the hollow tube, the lower end of the telescopic rod is fixedly connected to the lower pressure arc plate, the upper end of the hollow tube is fixedly connected to the air guide tube, and the traction tooth plate is slidably connected to the side plate.

[0011] Preferably, the lower end of the double-tooth plate shaft is meshingly connected to the tooth block, the end of the positioning worm away from the adjusting motor passes through the interior of the mounting frame and is fixedly connected to the gear plate, one side of the piston box is fixedly connected to the mounting frame, and the interior of the piston box is a cavity.

[0012] Preferably, the outer surface of the annular gear plate is meshingly connected to the positioning worm, the upper and lower ends of the limiting slide rail are fixedly connected to the inner wall of the mounting frame, the clamping plate has an arc-shaped shape, and the end of the bidirectional lead screw away from the servo motor is rotatably connected to the inner wall of the support plate.

[0013] Preferably, the upper surface of the side plate is symmetrically provided with guide grooves matching the lower pressure frame, and the annular tooth plate is provided with an annular groove matching the limiting slide rail on one side thereof close to the limiting slide rail.

[0014] Preferably, the method for using the durability testing fixture for electrical wiring harnesses comprises the following steps:

[0015] Step 1: After passing one end of the electrical wiring harness through the inside of the clamping plate, place it between the supporting arc plate and the pressing arc plate to perform preliminary clamping and positioning of one end of the electrical wiring harness;

[0016] Step 2: The other end of the electrical wiring harness is clamped and positioned in the same manner, and then the adjusting motor (16) is controlled to drive the positioning worm (15) to rotate. Through the transmission between the gears, the positioning worm (15) drives the annular toothed plate (27) to rotate on the limiting slide rail (28), and the annular toothed plate (27) drives the internal positioning push rod (25) to move, so that the positioning push rod (25) drives the clamping plate (26) on the moving slider (24) to further clamp the electrical wiring harness in the middle, and the multi-point clamping method improves the clamping stability, and facilitates the clamping and positioning of electrical wiring harnesses of different diameters, which helps to increase the use range of the clamp;

[0017] Step 3: When the positioning worm rotates, the positioning worm drives the gear plate to rotate synchronously, and through the transmission between the gears, the gear plate piston moves toward the inside of the piston box, thereby changing the pressure inside the piston box, so that the gas inside the piston box enters the inside of the hollow tube through the air guide pipe, and the telescopic rod moves vertically downward inside the hollow tube, increasing the effect between the downward pressure arc plate and the electrical wiring harness, thereby achieving the effect of further improving the clamping stability of the electrical wiring harness by the fixture;

[0018] Step 4: After positioning the electrical wiring harness, control the servo motor to drive the bidirectional lead screw to rotate inside the support plate, so that the two guide sliders move in opposite directions, and the two guide sliders respectively drive the corresponding mounting frames to move, thereby testing the durability of the electrical wiring harness;

[0019] Step 5: As the distance between the two mounting frames increases, the double-toothed plate shaft inside the limit plates on both sides of the side plate meshes with the tooth blocks, and then the double-toothed plate shaft rolls on the tooth blocks, so that the upper end of the double-toothed plate shaft drives the traction tooth plate to move toward the mounting frame, so that the traction tooth plate pulls the crank pull rod to move, and then the lower pressure frame is pulled toward the inside of the side plate through the concentric axis of the upper end of the crank pull rod, shortening the distance between the lower pressure arc plate and the supporting arc plate, which helps to indirectly increase the force between the electrical wiring harness and the supporting arc plate and the lower pressure arc plate. Therefore, by changing the pressure and shortening the distance, it can not only achieve the effect of reinforcing and preventing the electrical wiring harness from falling off before detection, but also achieve the effect of further reinforcing the electrical wiring harness during detection, so as to ensure the accuracy of the detection results.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) The present invention places the electrical wiring harness between the supporting arc plate and the lower arc plate. Since the force is mutual, the lower arc plate initially clamps the electrical wiring harness, and through the transmission between the gears, the positioning push rod pushes the movable slider to slide inside the guide slide rail, so that the movable slider further clamps the electrical wiring harness in the middle through the clamping plate on the limit column, and multiple clamping plates are evenly distributed, so the clamping plates clamp from multiple points. The multi-point clamping method improves the stability of the clamping of the electrical wiring harness, and facilitates the clamping and positioning of electrical wiring harnesses of different diameters, which helps to increase the use range of the clamp;

[0022] (2) When the positioning worm rotates, the gas inside the piston box enters the hollow tube through the air guide pipe through the transmission between the gears, thereby increasing the pressure between the hollow tube and the telescopic rod, causing the telescopic rod to move vertically downward inside the hollow tube, increasing the effect between the downward pressure arc plate and the electrical wiring harness, thereby achieving the effect of further improving the clamping stability of the electrical wiring harness by the clamp;

[0023] (3) The present invention uses the transmission between gears to make the upper end of the crank pull rod coaxially pull the lower pressure frame to move toward the inside of the side plate, thereby shortening the distance between the lower pressure arc plate and the supporting arc plate, which helps to indirectly increase the interaction force between the electrical wiring harness and the supporting arc plate and the lower pressure arc plate. In the process of stretching the electrical wiring harness, the electrical wiring harness can be indirectly prevented from falling off by shortening the distance, so as to ensure the accuracy of the detection result. Moreover, by changing the pressure and shortening the distance, the electrical wiring harness can be reinforced to prevent falling off before detection, and the electrical wiring harness can be further reinforced during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings;

[0025] Figure 1It is a three-dimensional diagram of the structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the downward arc plate of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the lower pressing frame of the present invention;

[0028] Figure 4 It is a top view of the structure of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the mounting frame of the present invention;

[0030] Figure 6 It is a side view of the structure of the present invention;

[0031] Figure 7 The present invention Figure 3 A magnified image of area A;

[0032] Figure 8 It is a structural schematic diagram of the limiting slide rail of the present invention.

[0033] Legend: 1. Support plate; 2. Bidirectional lead screw; 3. Servo motor; 4. Guide slide block; 5. Mounting frame; 6. Side plate; 7. Lower pressure frame; 8. Tooth block; 9. Support arc plate; 10. Telescopic member; 11. Lower pressure arc plate; 01. Air guide tube; 12. Piston box; 13. Gear plate piston; 14. Gear plate; 15. Positioning worm; 16. Adjusting motor; 17. Limiting plate; 18. Double gear plate shaft; 19. Traction gear plate; 20. Crank pull rod; 21. Concentric shaft; 22. Positioning ring; 23. Guide slide rail; 24. Moving slide block; 25. Positioning push rod; 02. Limiting column; 26. Clamping plate; 27. Ring gear plate; 28. Limiting slide rail. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1-8As shown, the present invention is a durability testing fixture for electrical wiring harnesses, comprising a support plate 1, wherein a bidirectional lead screw 2 is rotatably connected inside the support plate 1, and one end of the bidirectional lead screw 2 away from the servo motor 3 is rotatably connected to the inner wall of the support plate 1, and a servo motor 3 is fixedly connected to one side of the support plate 1, and the servo motor 3 is transmission-connected to the bidirectional lead screw 2, and a guide slider 4 is symmetrically slidably connected inside the upper surface of the support plate 1, and the guide slider 4 is located outside the bidirectional lead screw 2, and a mounting frame 5 is fixedly connected to the upper surface of the guide slider 4, that is, in the process of testing the electrical wiring harness, the servo motor 3 can be controlled to drive the bidirectional lead screw 2 to rotate inside the support plate 1, so that the two guide sliders 4 move in opposite directions, and the two guide sliders 4 respectively drive the corresponding mounting frame 5 to move, thereby testing the durability of the electrical wiring harness;

[0037] Among them, the mounting frame 5 is fixedly connected to a side plate 6 on the side close to the servo motor 3, and the upper surface of the side plate 6 is symmetrically provided with guide grooves matching the lower pressure frame 7, and the upper surface of the side plate 6 is slidably inserted with the lower pressure frame 7, and the front and rear surfaces of the support plate 1 are fixedly connected with tooth blocks 8, and the upper surface of the lower pressure frame 7 is fixedly connected with a supporting arc plate 9, and the upper surface of the lower pressure frame 7 is fixedly connected with a telescopic member 10, and the end of the telescopic member 10 close to the supporting arc plate 9 is fixedly connected with a lower pressure arc plate 11, and the upper surface of the telescopic member 10 is fixedly connected with an air guide pipe 01, and the telescopic member 10 includes a telescopic rod, a hollow tube and a hollow spring, the lower end of the hollow tube is fixedly connected to the lower pressure frame 7, and the upper end of the hollow spring is fixedly connected to the hollow tube The internal top surface is fixedly connected, the lower end of the hollow spring is fixedly connected to the telescopic rod, the upper end of the telescopic rod is slidably connected to the hollow tube, the lower end of the telescopic rod is fixedly connected to the lower pressure arc plate 11, and the upper end of the hollow tube is fixedly connected to the air guide tube 01. When the electrical wiring harness is tested, one end of the electrical wiring harness is passed through the inside of the clamping plate 26 and placed between the supporting arc plate 9 and the lower pressure arc plate 11. During the placement process, the electrical wiring harness is squeezed to make the telescopic rod slide into the inside of the hollow tube, and at the same time, the hollow spring is elastically deformed. Since the force is mutual, the lower pressure arc plate 11 preliminarily clamps the electrical wiring harness, and the other end of the electrical wiring harness is straightened and clamped and positioned in the same way;

[0038] Among them, an adjusting motor 16 is fixedly connected to the side of the mounting frame 5 away from the gear plate 14, a positioning worm 15 is rotatably connected inside the mounting frame 5, and one end of the positioning worm 15 is transmission-connected to the adjusting motor 16, a positioning ring 22 is fixedly connected inside the mounting frame 5, a guide rail 23 is fixedly connected inside the positioning ring 22, a moving slider 24 is slidably connected inside the guide rail 23, a positioning push rod 25 is rotatably connected to the front surface of the moving slider 24, a limiting column 02 is fixedly connected to one side of the moving slider 24, a clamping plate 26 is fixedly connected to the end of the limiting column 02 away from the moving slider 24, and the positioning push rod 25 is away from the guide rail One end of 23 is rotatably connected with an annular gear plate 27, the outer surface of the annular gear plate 27 is meshed with the positioning worm 15, the upper and lower ends of the limiting slide rail 28 are fixedly connected with the inner wall of the mounting frame 5, the outer shape of the clamping plate 26 is arc-shaped, the front surface of the annular gear plate 27 is internally rotatably connected with the limiting slide rail 28, and the annular gear plate 27 is provided with an annular groove that cooperates with the limiting slide rail 28 on one side close to the limiting slide rail 28, that is, when the initial positioning of the two ends is completed, the control and adjustment motor 16 drives the positioning worm 15 to rotate, and the positioning worm 15 drives the annular gear plate 27 to rotate through the transmission between the gears, and when the annular gear plate 27 rotates During the movement, the annular toothed plate 27 is rotated on the limiting slide rail 28. At the same time, the annular toothed plate 27 drives the internal positioning push rod 25 to move. During the movement of the positioning push rod 25, the positioning push rod 25 drives the moving slider 24 to move, so that the positioning push rod 25 pushes the moving slider 24 to slide inside the guide slide rail 23. As the moving slider 24 slides inside the guide slide rail 23, the moving slider 24 drives the limiting column 02 to move synchronously, so that the moving slider 24 further clamps the electrical wiring harness in the middle through the clamping plate 26 on the limiting column 02, and a plurality of clamping plates 26 are evenly distributed. Therefore, the clamping plate 26 is clamped from multiple points, and the stability of the clamping of the electrical wiring harness is improved by the multi-point clamping method, and it is convenient to clamp and position the electrical wiring harnesses of different diameters, which helps to improve the use range of the clamp, and the electrical wiring harness is clamped in the middle by the clamping plates 26 inside the mounting frames 5 on both sides of the support plate 1, which is convenient for detecting the electrical wiring harness between the two mounting frames 5. The initial preliminary clamping, on the one hand, helps to preliminarily install the electrical wiring harness and reduce the influence of tension on detection during the installation of the electrical wiring harness, and on the other hand, helps to position and clamp the electrical wiring harness from the front end, thereby achieving the effect of improving the stability of the electrical wiring harness.

[0039] Embodiment 2:

[0040] Among them, a piston box 12 is fixedly connected to one end of the air guide tube 01 away from the telescopic member 10, one side of the piston box 12 is fixedly connected to the mounting frame 5, and the interior of the piston box 12 is a cavity, and a toothed plate piston 13 is slidably inserted into the lower surface of the piston box 12, and one side of the toothed plate piston 13 is meshingly connected with a gear plate 14, that is, when the positioning worm 15 rotates, the positioning worm 15 drives the gear plate 14 to rotate synchronously, and through the transmission between the gears, the toothed plate piston 13 moves toward the inside of the piston box 12, thereby changing the pressure inside the piston box 12, so that the gas inside the piston box 12 enters the inside of the hollow tube through the air guide tube 01, thereby increasing the pressure between the hollow tube and the telescopic rod, so that the telescopic rod moves vertically downward inside the hollow tube, increasing the effect between the lower pressure arc plate 11 and the electrical wiring harness, thereby achieving the effect of further improving the clamping stability of the electrical wiring harness by the clamp;

[0041] The end of the positioning worm 15 away from the adjusting motor 16 passes through the interior of the mounting frame 5 and is fixedly connected to the gear plate 14. The front and rear surfaces of the side plate 6 are fixedly connected to the limit plate 17. The inner rotation of the limit plate 17 is connected with a double-tooth plate shaft 18. The lower end of the double-tooth plate shaft 18 is meshed with the tooth block 8. The upper end of the double-tooth plate shaft 18 is meshed with a traction tooth plate 19. The traction tooth plate 19 is slidably connected to the side plate 6. One end of the upper surface of the traction tooth plate 19 is movably connected with a crank pull rod 20. The crank pull rod 20 is away from the traction tooth plate 19. One end of the guide plate 19 is rotatably connected to a coaxial shaft 21, and the coaxial shaft 21 is fixedly connected to the lower pressure frame 7, that is, after the electrical wiring harness is positioned, the servo motor 3 is controlled to drive the bidirectional lead screw 2 to rotate inside the support plate 1, so that the two guide sliders 4 move in opposite directions, and the two guide sliders 4 respectively drive the corresponding mounting frames 5 to move. In the process of increasing the distance between the two mounting frames 5, the double-toothed plate shaft 18 inside the limit plates 17 on both sides of the side plate 6 is engaged with the tooth block 8, thereby making the double-toothed plate shaft 18 The double tooth plate shaft 18 rolls on the tooth block 8, and due to the rolling of the lower end of the double tooth plate shaft 18, the upper end of the double tooth plate shaft 18 drives the traction tooth plate 19 to move through the transmission between the gears, so that the traction tooth plate 19 moves in the direction close to the mounting frame 5, and the traction tooth plate 19 pulls the crank pull rod 20 to move, and then the lower pressure frame 7 is pulled to move inside the side plate 6 through the concentric shaft 21 at the upper end of the crank pull rod 20, that is, the lower pressure frame 7 moves vertically downward in the guide groove, thereby shortening the distance between the lower pressure arc plate 11 and the supporting arc plate 9. The spacing helps to indirectly increase the force between the electrical wiring harness and the supporting arc plate 9 and the pressing arc plate 11. In the process of stretching the electrical wiring harness, the electrical wiring harness can be indirectly improved by shortening the spacing to prevent it from falling off, so as to ensure the accuracy of the detection result. Therefore, by changing the pressure and shortening the spacing, the electrical wiring harness can be reinforced to prevent it from falling off before detection, and the electrical wiring harness can be further reinforced during detection, thereby solving the problem of unstable clamping of the electrical wiring harness by the existing clamp during detection.

[0042] The working process and principle of the present invention are as follows:

[0043] After one end of the electrical wiring harness passes through the inside of the clamping plate 26, it is placed between the supporting arc plate 9 and the lower arc plate 11. During the placement process, it is squeezed by the electrical wiring harness, causing the telescopic rod to slide into the inside of the hollow tube, and at the same time, the hollow spring is elastically deformed. Since the force is mutual, the lower arc plate 11 preliminarily clamps the electrical wiring harness, and the other end of the electrical wiring harness is straightened and clamped and positioned in the same way. When the two ends are preliminarily positioned, the control and adjustment motor 16 drives the positioning worm 15 to rotate, and the annular gear plate 2 is driven through the transmission between the gears. 7 drives the internal positioning push rod 25 to move, so that the positioning push rod 25 drives the moving slider 24 to move, so that the positioning push rod 25 pushes the moving slider 24 to slide inside the guide rail 23, so that the moving slider 24 further clamps the middle electrical wiring harness through the clamping plate 26 on the limit column 02, and there are multiple clamping plates 26 evenly distributed, so that the clamping plate 26 clamps from multiple points, and the multi-point clamping method improves the stability of the clamping of the electrical wiring harness, and facilitates the clamping and positioning of electrical wiring harnesses of different diameters, which helps to improve the use range of the clamp;

[0044] When the positioning worm 15 rotates, the gear plate piston 13 moves toward the inside of the piston box 12 through the transmission between the gears, thereby changing the pressure inside the piston box 12, so that the gas inside the piston box 12 enters the inside of the hollow tube through the air guide pipe 01, thereby increasing the pressure between the hollow tube and the telescopic rod, causing the telescopic rod to move vertically downward inside the hollow tube, increasing the effect between the lower arc plate 11 and the electrical wiring harness, thereby achieving the effect of further improving the clamping stability of the electrical wiring harness by the clamp, and after the electrical wiring harness is positioned, the electrical wiring harness is tested, and the distance between the two mounting frames 5 is continuously increasing, so that the inside of the limit plates 17 on both sides of the side plate 6 The double-tooth plate shaft 18 is meshed with the tooth block 8, and through the transmission between the gears, the concentric shaft 21 at the upper end of the crank pull rod 20 pulls the lower pressure frame 7 to move toward the inside of the side plate 6, thereby shortening the distance between the lower pressure arc plate 11 and the supporting arc plate 9, which helps to indirectly increase the interaction force between the electrical wiring harness and the supporting arc plate 9 and the lower pressure arc plate 11. In the process of stretching the electrical wiring harness, the electrical wiring harness can be indirectly prevented from falling off by shortening the distance, so as to ensure the accuracy of the test results. Therefore, by changing the pressure and shortening the distance, the electrical wiring harness can be reinforced to prevent falling off before detection, and the electrical wiring harness can be further reinforced during detection.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fixture for testing the durability of electrical wiring harnesses, comprising a support plate (1), characterized in that: The support plate (1) is internally rotatably connected to a bidirectional lead screw (2), one side of the support plate (1) is fixedly connected to a servo motor (3), and the servo motor (3) is transmission-connected to the bidirectional lead screw (2), the upper surface of the support plate (1) is internally symmetrically slidably connected to a guide slider (4), and the guide slider (4) is located outside the bidirectional lead screw (2), the upper surface of the guide slider (4) is fixedly connected to a mounting frame (5), the side of the mounting frame (5) close to the servo motor (3) is fixedly connected to a side plate (6), the upper surface of the side plate (6) is internally slidably plugged with a lower pressure frame (7), the front and rear surfaces of the support plate (1) are both fixedly connected to tooth blocks (8), the upper surface of the lower pressure frame (7) is fixedly connected to a support arc plate (9), the upper surface of the lower pressure frame (7) is internally fixedly connected to a telescopic member (10), and the end of the telescopic member (10) close to the support arc plate (9) is fixedly connected to a lower pressure arc plate (11); An air guide tube (01) is fixedly connected to the upper surface of the telescopic member (10); an end of the air guide tube (01) away from the telescopic member (10) is fixedly connected to a piston box (12); a toothed plate piston (13) is slidably inserted into the lower surface of the piston box (12); and one side of the toothed plate piston (13) is meshingly connected to a gear plate (14); The side of the mounting frame (5) away from the gear plate (14) is fixedly connected to an adjusting motor (16), the mounting frame (5) is internally rotatably connected to a positioning worm (15), and one end of the positioning worm (15) is transmission-connected to the adjusting motor (16), the front and rear surfaces of the side plate (6) are both fixedly connected to a limiting plate (17), the limiting plate (17) is internally rotatably connected to a double-tooth plate shaft (18), the upper end of the double-tooth plate shaft (18) is meshingly connected to a traction tooth plate (19), one end of the upper surface of the traction tooth plate (19) is movably connected to a crank pull rod (20), the end of the crank pull rod (20) away from the traction tooth plate (19) is rotatably connected to a concentric shaft (21), and the concentric shaft (21) is fixedly connected to the lower pressing frame (7); The interior of the mounting frame (5) is fixedly connected to a positioning ring (22), the interior of the positioning ring (22) is fixedly connected to a guide rail (23), the interior of the guide rail (23) is slidably connected to a moving slider (24), the front surface of the moving slider (24) is rotatably connected to a positioning push rod (25), one side of the moving slider (24) is fixedly connected to a limiting column (02), the end of the limiting column (02) away from the moving slider (24) is fixedly connected to a clamping plate (26), the end of the positioning push rod (25) away from the guide rail (23) is rotatably connected to an annular toothed plate (27), and the front surface of the annular toothed plate (27) is rotatably connected to the limiting rail (28); The telescopic member (10) comprises a telescopic rod, a hollow tube and a hollow spring, the lower end of the hollow tube is fixedly connected to the lower pressure frame (7), the upper end of the hollow spring is fixedly connected to the inner top surface of the hollow tube, the lower end of the hollow spring is fixedly connected to the telescopic rod, the upper end of the telescopic rod is slidably connected to the hollow tube, the lower end of the telescopic rod is fixedly connected to the lower pressure arc plate (11), the upper end of the hollow tube is fixedly connected to the air guide tube (01), and the traction tooth plate (19) is slidably connected to the side plate (6); The lower end of the double-tooth plate shaft (18) is meshingly connected to the tooth block (8); the end of the positioning worm (15) away from the adjustment motor (16) passes through the interior of the mounting frame (5) and is fixedly connected to the gear plate (14); one side of the piston box (12) is fixedly connected to the mounting frame (5), and the interior of the piston box (12) is a cavity; The outer surface of the annular toothed plate (27) is meshingly connected to the positioning worm (15), the upper and lower ends of the limit slide rail (28) are fixedly connected to the inner wall of the mounting frame (5), the outer shape of the clamping plate (26) is arc-shaped, and the end of the bidirectional lead screw (2) away from the servo motor (3) is rotatably connected to the inner wall of the support plate (1); The upper surface of the side plate (6) is symmetrically provided with guide grooves matching the lower pressing frame (7), and the side of the annular toothed plate (27) close to the limiting slide rail (28) is provided with an annular groove matching the limiting slide rail (28).

2. A durability testing fixture for electrical wiring harness according to claim 1, characterized in that: The method of using the durability testing fixture for electrical wiring harnesses includes the following steps: Step 1: After passing one end of the electrical wiring harness through the inside of the clamping plate (26), the end is placed between the supporting arc plate (9) and the pressing arc plate (11) to perform preliminary clamping and positioning of the end of the electrical wiring harness; Step 2: The other end of the electrical wiring harness is clamped and positioned in the same manner, and then the adjusting motor (16) is controlled to drive the positioning worm (15) to rotate. Through the transmission between the gears, the positioning worm (15) drives the annular toothed plate (27) to rotate on the limiting slide rail (28). The annular toothed plate (27) drives the internal positioning push rod (25) to move, so that the positioning push rod (25) drives the clamping plate (26) on the moving slider (24) to further clamp the electrical wiring harness in the middle. The multi-point clamping method improves the clamping stability and facilitates the clamping and positioning of electrical wiring harnesses of different diameters, which helps to increase the use range of the clamp; Step 3: When the positioning worm (15) rotates, the positioning worm (15) drives the gear plate (14) to rotate synchronously, and through the transmission between the gears, the gear plate piston (13) moves toward the inside of the piston box (12), thereby changing the pressure inside the piston box (12), so that the gas inside the piston box (12) enters the inside of the hollow tube through the air guide tube (01), and the telescopic rod moves vertically downward inside the hollow tube, thereby increasing the effect between the downward pressure arc plate (11) and the electrical wiring harness, thereby achieving the effect of further improving the clamping stability of the electrical wiring harness by the clamp; Step 4: After the electrical wiring harness is positioned, the servo motor (3) is controlled to drive the bidirectional lead screw (2) to rotate inside the support plate (1), so that the two guide sliders (4) move in opposite directions, and the two guide sliders (4) respectively drive the corresponding mounting frames (5) to move, thereby testing the durability of the electrical wiring harness; Step 5: As the distance between the two mounting frames (5) increases, the double toothed plate shaft (18) inside the limit plates (17) on both sides of the side plate (6) meshes with the toothed block (8), so that the double toothed plate shaft (18) rolls on the toothed block (8), so that the upper end of the double toothed plate shaft (18) drives the traction toothed plate (19) to move in a direction close to the mounting frame (5), so that the traction toothed plate (19) pulls the crank pull rod (20) to move, and then the crank pull rod (20) is moved upward. The end concentric shaft (21) pulls the lower pressure frame (7) to move toward the inside of the side plate (6), shortening the distance between the lower pressure arc plate (11) and the supporting arc plate (9), which helps to indirectly increase the force between the electrical wiring harness and the supporting arc plate (9) and the lower pressure arc plate (11). Therefore, by changing the pressure and shortening the distance, the electrical wiring harness can be reinforced to prevent it from falling off before detection, and the electrical wiring harness can be further reinforced during detection, so as to ensure the accuracy of the detection result.

Images