Low-voltage wire harness multi-angle tension dynamic testing device and method

Abstract

The invention relates to the technical field of wire harness testing devices, in particular to a low-voltage wire harness multi-angle tension dynamic testing device and method.The low-voltage wire harness multi-angle tension dynamic testing device comprises a base and further comprises two fixers movably connected to the base, and the two fixers comprise sliding groove frames movably connected to the base; sliding devices are connected to the opposite sides of the two sliding groove frames in a sliding mode, rotating frames are connected to the sides, away from the sliding groove frames, of the sliding devices in a sliding mode, tension sensors are installed between the sliding devices and the rotating frames, and rotatable chucks are connected to the interiors of the rotating frames. According to the invention, through the arrangement of the fixer, the regulator and the clamp holder, through multi-node dynamic regulation and control and multi-dimensional force field simulation, accurate reproduction of complex working conditions of the low-voltage wire harness is realized; the multiple devices can adjust the position and height of the low-voltage wire harness, the complex trend that the low-voltage wire harness penetrates through a metal plate hole and bypasses components in a vehicle can be reproduced, and the simulation accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness testing devices, and in particular to a multi-angle tension dynamic testing device and method for a low-voltage wire harness. Background Art

[0002] Low-voltage wiring harnesses refer to wire assemblies with low operating voltages used to transmit power or signals. They are widely used in automobiles, home appliances, industrial machinery, and other fields. They are the blood vessels and nerves of the equipment's electrical system, and their performance directly affects the safety and reliability of the equipment. During the production process, low-voltage wiring harnesses require dynamic tensile testing to ensure their quality. Existing low-voltage wiring harness tensile testing equipment is mostly based on basic clamping and unidirectional drive, equipped with testers to obtain tensile data. However, these equipment usually only performs axial tensile testing on low-voltage wiring harnesses to detect their ability to withstand stress in a single direction. This makes it difficult to reproduce the conditions under which the wiring harness is subjected to dynamic stress at multiple angles and directions, reducing test accuracy.

[0003] In the prior art, dynamic changes in the stretching angle are achieved through a swinging tensile testing device and a swinging adjustment device. In this method, it is impossible to form multi-node adjustment for the low-voltage wire harness, and there is a lack of composite force testing of pulling, rotating and twisting, which reduces the accuracy of the test; multi-angle guide plates, wire harness ribs and clamping components are used to achieve tensile testing of the wire harness at a specific angle. In this method, the adjustment of the wire harness angle depends on fixed ribs, which cannot be dynamically switched and the force form is single, which cannot accurately simulate the complex direction of the wire harness when in use, reducing the accuracy of the test. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that low-voltage wiring harnesses cannot be adjusted at multiple nodes, and lack composite force testing of pulling, rotating and twisting, which reduces the accuracy of the test, and to propose a multi-angle tension dynamic testing device and method for low-voltage wiring harnesses.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A low-voltage wiring harness multi-angle tension dynamic testing device includes a base and a device movably connected to the base: Two fixtures, each comprising a slide frame movably connected to a base, each of the two slide frames being slidably connected to a sliding device on opposite sides, the sliding device being slidably connected to a rotating frame on a side away from the slide frame, a tension sensor being installed between the sliding device and the rotating frame, a rotatable chuck being connected inside the rotating frame, and the two chucks correspondingly clamping the two ends of the low-voltage wiring harness; A regulator, the regulator comprising a lifter movably connected to a base, the lifting end of the lifter being a lifting plate, a fixed pulley rotatably connected to the lifting plate, the fixed pulley resting against the middle section of the low-voltage wiring harness; Two clamps, each clamp includes a lifting assembly movably connected to a base, an output end of the lifting assembly is fixedly connected to a clamping assembly, and the two clamping assemblies are respectively located between the regulator and the two fixers and are clamped with the low-voltage wiring harness.

[0006] Preferably, a terminal interface is fixedly connected to the middle of the chuck, and the terminal interface is plugged into and matched with the terminal of the low-voltage wiring harness.

[0007] Preferably, a plurality of latch plates are fixedly connected to the edge of the chuck, and the latch plates are engaged with the low-voltage wiring harness.

[0008] Preferably, one of the lifting components includes a lifting frame movably connected to the base, a slidable connecting block is connected inside the lifting frame, and the bottom of the connecting block is fixedly connected to a clamping component, and the clamping end of the clamping component faces downward.

[0009] Preferably, a first sliding rod is fixedly connected inside the lifting frame, and the connecting block is slidably connected to the first sliding rod.

[0010] Preferably, the other lifting component includes a movable frame movably connected to the base, an electric push rod is installed on the movable frame, the output end of the electric push rod is fixedly connected to a connecting plate, the top of the connecting plate is fixedly connected to another clamping component, and the clamping end of this clamping component faces upward.

[0011] Preferably, a plurality of second sliding rods are fixedly connected to the movable frame, and the connecting plate is slidably connected to the plurality of second sliding rods.

[0012] Preferably, the clamping assembly includes a small motor, and the two small motors are respectively installed at the bottom of the connecting block and the top of the connecting plate. The output end of the small motor is rotatably connected to a rotating frame and coaxially fixedly connected to a driving shaft. The inner side of the rotating frame is rotatably connected to two connecting rods and is connected to two movable fixed blocks on the side away from the small motor. A special-shaped card block is fixedly connected to the connecting rod, and the two fixed blocks correspond to each other and abut against the two special-shaped card blocks. When the two fixed blocks are away from each other, the special-shaped card block is moved so that the end away from the fixed block is engaged with the driving shaft. A pressure sensor is installed inside the fixed block, and the pressure sensor is used to detect the extrusion force between the fixed block and the low-voltage wiring harness.

[0013] Preferably, a control console is installed on the base, and the control console is electrically connected to the sliding device, chuck, lifter, pressure sensor, electric push rod, tension sensor, and small motor, and is used to control the working status of each actuator and receive signals from each sensor.

[0014] A method for dynamic multi-angle tension testing of a low-voltage wiring harness, using the above-mentioned dynamic multi-angle tension testing device for a low-voltage wiring harness, comprises the following steps: S1. Device adjustment: adjust the position and height of the fixer, adjuster and clamp according to the specifications of the low-voltage wire harness to ensure accurate matching; S2. Install the low-voltage wiring harness. Divide the low-voltage wiring harness into five nodes and connect them to two fixers, one regulator, and two clamps. S3, angle setting, adjust the height position of the five nodes to make the low-voltage harness form the required multi-angle state; S4, tensile test, applies dynamic forces of pulling, rotating and twisting to the low-voltage harness at five nodes to simulate different working conditions; S5, data recording, the console receives and records the data fed back by the tension sensor and pressure sensor; S6, state switching, adjust the angle parameters of S3, and repeat S4 and S5; S7. Result analysis: Analyze the recorded data to evaluate the performance of the low-voltage wiring harness under multi-angle tension dynamic test conditions.

[0015] Compared with the prior art, the advantages of the present invention are: 1. The present invention realizes the accurate reproduction of the complex working conditions of the low-voltage wiring harness by setting a fixer, an adjuster and a clamp through multi-node dynamic control and multi-dimensional force field simulation; multiple devices can adjust the position and height of the low-voltage wiring harness, and can reproduce the complex route of the low-voltage wiring harness in the vehicle passing through the sheet metal holes and bypassing the components, thereby improving the accuracy of the simulation; it can not only apply axial tension, but also form radial or oblique tension through the top pressure of the fixed pulley and the twisting of the clamp, and can simultaneously apply the composite force of pulling, rotating and twisting in a single test, simulating the pulling when the vehicle is bumpy and the swinging when turning, thereby improving the accuracy of the test.

[0016] 2. The present invention provides two fixers, and two chucks clamp and fix the two ends of the low-voltage wiring harness to form axial tension. At the same time, the chuck can be rotated in a controlled manner to rotate the low-voltage wiring harness, thereby improving the diversity of dynamic testing. The chuck is provided with a terminal interface and a tooth plate. The terminal interface simulates the actual plug-in state of the terminal, and the tooth plate is used to limit the low-voltage wiring harness when it is bent, so that the chuck can stably drive the low-voltage wiring harness to rotate.

[0017] 3. The present invention sets a clamping assembly, which controls the linkage state of the special-shaped clamping block and the drive shaft through the opening and closing of two fixed blocks. It can realize static clamping positioning when the two fixed blocks clamp the low-voltage wiring harness, and can realize dynamic torsion through the clamping of the special-shaped clamping block and the drive shaft when the two fixed blocks are separated, completing the seamless switching between fixed posture and dynamic force to meet different testing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a low-voltage wiring harness multi-angle tension dynamic testing device proposed by the present invention.

[0019] Figure 2 This is a schematic structural diagram of the base, console and fixture of a low-voltage wiring harness multi-angle tension dynamic testing device proposed by the present invention.

[0020] Figure 3 This is a structural schematic diagram of the fixator portion of a low-voltage wiring harness multi-angle tension dynamic testing device proposed by the present invention.

[0021] Figure 4 This is a schematic diagram of the regulator structure of a low-voltage wiring harness multi-angle tension dynamic testing device proposed by the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of a clamp with the clamping end facing downwards in a low-voltage wiring harness multi-angle tension dynamic testing device proposed by the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of a clamp with the clamping end facing upwards in a low-voltage wiring harness multi-angle tension dynamic testing device proposed by the present invention.

[0024] Figure 7 This is a schematic diagram of the internal structure of a rotating frame of a low-voltage wiring harness multi-angle tension dynamic testing device proposed by the present invention.

[0025] In the figure: 1. Base; 2. Control console; 3. Gear plate; 4. Slide frame; 5. Sliding device; 6. Chuck; 7. Lifting frame; 8. First sliding rod; 9. Connecting block; 10. Lifter; 11. Pressure sensor; 12. Fixed pulley; 13. Lifting plate; 14. Second sliding rod; 15. Connecting plate; 16. Electric push rod; 17. Tension sensor; 18. Rotating frame; 19. Fixed block; 20. Small motor; 21. Drive shaft; 22. Special-shaped clamping block; 23. Connecting rod; 24. Terminal interface. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Reference Figure 1-Figure 3 A low-voltage wiring harness multi-angle tension dynamic testing device includes a base 1 and a device movably connected to the base 1: Two fixtures, the fixture includes a slide frame 4 movably connected to the base 1, and the two slide frames 4 are slidably connected to the sliding device 5 on the opposite side. The sliding device 5 is slidably connected to the rotating frame on the side away from the slide frame 4. A tension sensor 17 is installed between the sliding device 5 and the rotating frame. A rotatable chuck 6 is connected inside the rotating frame, and the two chucks 6 correspond to the two ends of the low-voltage wiring harness.

[0028] The sliding device 5 is an existing vertical driving device, and its output end is controlled to move up and down, thereby driving the chuck 6 to move up and down, and is used to adjust the height of the two ends of the low-voltage wire harness.

[0029] A rotating motor is installed inside the rotating frame, and the output end of the rotating motor is fixedly connected to the chuck 6. When the rotating motor is working, its output end drives the chuck 6 to rotate to apply a rotational force to the low-voltage wiring harness.

[0030] The middle of the chuck 6 is fixedly connected with a terminal interface 24, which is plugged into and matched with the terminals of the low-voltage wiring harness to simulate the normal use of the low-voltage wiring harness and improve the accuracy of the simulation.

[0031] A plurality of latch plates 3 are fixedly connected to the edge of the chuck 6 , and the latch plates 3 are engaged with the low-voltage wiring harness.

[0032] The low-voltage wiring harness in contact with the clamping plate 3 is limited by the clamping plate 3, so that the clamping plate 6 can drive the low-voltage wiring harness to rotate, effectively preventing the low-voltage wiring harness from directly acting on the terminal when rotating.

[0033] Reference Figure 4 , regulator, the regulator includes a lifter 10 movably connected to the base 1, the lifting end of the lifter 10 is a lifting plate 13, the lifting plate 13 is rotatably connected to a fixed pulley 12, and the fixed pulley 12 abuts against the middle section of the low-voltage wire harness.

[0034] The lifter 10 adopts the existing technology. When it works, it drives the lifting plate 13 to move up and down, so that the fixed pulley 12 can apply a lifting and pressing force to the low-voltage wire harness.

[0035] Reference Figure 5-Figure 7 , two clamps, the clamp includes a lifting assembly movably connected to the base 1, the output end of the lifting assembly is fixedly connected to the clamping assembly, the two clamping assemblies are respectively located between the regulator and the two holders, and are clamped with the low-voltage wire harness.

[0036] A lifting assembly includes a lifting frame 7 movably connected to the base 1, a slidable connecting block 9 is connected inside the lifting frame 7, and the bottom of the connecting block 9 is fixedly connected to a clamping assembly, and the clamping end of the clamping assembly faces downward.

[0037] The lifting frame 7 is equipped with a linear drive device in the prior art, which is used to drive the connecting block 9 to move up and down, so that the clamping assembly can apply a lifting and pressing force to the low-voltage wiring harness.

[0038] A first sliding rod 8 is fixedly connected to the interior of the lifting frame 7 , and a connecting block 9 is slidably connected to the first sliding rod 8 , so that the connecting block 9 can move up and down stably through the first sliding rod 8 .

[0039] Another lifting assembly includes a moving frame movably connected to the base 1, on which an electric push rod 16 is installed. The output end of the electric push rod 16 is fixedly connected to a connecting plate 15, and the top of the connecting plate 15 is fixedly connected to another clamping assembly, the clamping end of which faces upward.

[0040] A plurality of second sliding rods 14 are fixedly connected to the moving frame, and the connecting plate 15 is slidably connected to the plurality of second sliding rods 14 , so that the connecting plate 15 can stably move up and down through the second sliding rods 14 .

[0041] The clamping assembly includes a small motor 20, and the two small motors 20 are respectively installed at the bottom of the connecting block 9 and the top of the connecting plate 15. The output end of the small motor 20 is rotatably connected to the rotating frame 18 and coaxially fixedly connected to the drive shaft 21. The inner side of the rotating frame 18 is rotatably connected to two connecting rods 23, and the side away from the small motor 20 is connected to two movable fixed blocks 19. A special-shaped card block 22 is fixedly connected to the connecting rod 23. The two fixed blocks 19 correspond one-to-one and abut against the two special-shaped card blocks 22. When the two fixed blocks 19 are away from each other, the special-shaped card block 22 is moved so that the end away from the fixed block 19 is engaged with the drive shaft 21. A pressure sensor 11 is installed inside the fixed block 19. The pressure sensor 11 is used to detect the extrusion force between the fixed block 19 and the low-voltage wiring harness.

[0042] Two pushing devices are installed on the rotating frame 18. The output ends of the two pushing devices are fixedly connected to two fixed blocks 19. The fixed block 19 includes an outer block fixed to the output end of the pushing device. The pressure sensor 11 is installed between the outer block and the inner block. The two inner blocks are clamped with the low-voltage wiring harness. The pushing device adopts the existing technology and is used to push the outer block to move. A toggle piece for toggling the special-shaped block 22 is provided at the bottom of the outer block.

[0043] Two fixers, one adjuster and two clamps are all installed on the base 1 through a mobile device. The mobile device adopts existing technology to control the movement of the device on the base 1, so as to facilitate the adjustment of the position of the device to cooperate with the dynamic test of the low-voltage wiring harness.

[0044] A control console 2 is mounted on the base 1. The control console 2 is electrically connected to the sliding device 5, the chuck 6, the lifter 10, the pressure sensor 11, the electric push rod 16, the tension sensor 17, and the small motor 20. The control console 2 is used to control the working state of each actuator and receive signals from each sensor.

[0045] When the present invention is used, the two ends of the low-voltage wire harness are respectively placed in the chucks 6 on the two fixers. The chuck 6 fixes the low-voltage wire harness through its own claws. The chuck 6 is connected to the sliding device 5 through the rotating motor, rotating frame and tension sensor 17 to complete the fixation of the two ends of the low-voltage wire harness. The tension sensor 17 transmits the tension data to the console 2.

[0046] A terminal interface 24 is provided in the middle of the chuck 6 , and the terminals of the low-voltage wiring harness are inserted into the terminal interface 24 to simulate normal use.

[0047] When the sliding device 5 is working, it moves up and down inside the chute frame 4 to adjust the positions of the two ends of the low-voltage wire harness, thereby adjusting the angle of the low-voltage wire harness.

[0048] A lifter 10 is installed in the middle position of the base 1. By adjusting the lifter 10, the lifting plate 13 is moved up and down, driving the fixed pulley 12 to move up and down. The middle section of the low-voltage wiring harness is against the top or bottom of the fixed pulley 12 according to the needs of the test. When the fixed pulley 12 is controlled to move up and down, the middle section of the low-voltage wiring harness is lifted and pressed down, and the bending curvature of the middle section of the low-voltage wiring harness is changed to simulate the minimum bending radius requirements of the low-voltage wiring harness in different installation spaces; and a local bend is created in the middle section of the low-voltage wiring harness to test the wear resistance of the insulation layer and the fatigue resistance of the wire, as well as the holding force between the terminal and the terminal interface 24.

[0049] By adjusting the height positions of the two chucks 6 and the height position of a fixed pulley 12, it is convenient to make the two ends and the middle section of the low-voltage wiring harness at different heights, and make the two ends of the low-voltage wiring harness bend to different angles, so as to accurately reproduce the complex path of the low-voltage wiring harness passing through sheet metal holes, bypassing components, and crossing height differences in the vehicle; and allow the pulling force to act on the low-voltage wiring harness axially, radially or in any oblique direction, simulating the situation where the low-voltage wiring harness is pulled up and down when the vehicle is bumpy and is swung laterally when turning, thereby improving the accuracy of the simulation.

[0050] The rotary motor in the rotating frame works, and its output end drives the chuck 6 to rotate, driving the two ends of the low-voltage wiring harness to rotate, simulating the installation status of the terminals in different directions in the actual vehicle, thereby improving the accuracy of the simulation.

[0051] At the same time, the chuck 6 is controlled to reciprocate, which is convenient for performing a mechanical rotation test on the terminal of the low-voltage wiring harness and checking the structural strength of the terminal.

[0052] A plurality of latch plates 3 are provided on the edge of the chuck 6. When the low-voltage wiring harness is in a bent state, the low-voltage wiring harness is latched onto the latch plates 3. The latch plates 3 limit the low-voltage wiring harness. When the chuck 6 rotates, the low-voltage wiring harness is stably driven to rotate through the latch plates 3 to prevent the terminal from being detached from the terminal interface 24.

[0053] Two clamps are provided between the adjuster and the two fixers, with the clamping end of one clamp facing upwards and the clamping end of the other clamp facing downwards. The clamps are used to clamp the low-voltage wire harness.

[0054] Through two fixators, one regulator and two clamps, the posture adjustment of the five nodes of the low-voltage wiring harness is achieved, and multiple bending points and stress areas are generated simultaneously on a single low-voltage wiring harness. The complex topological structure of the low-voltage wiring harness passing through multiple layers of brackets and bypassing moving parts in the real vehicle is accurately replicated, thereby improving the accuracy of the simulation.

[0055] When the lifting assembly in the left clamp is working, the connecting block 9 is controlled to move up and down inside the lifting frame 7, driving the clamping assembly on it to move up and down, so that the clamping end of this clamping assembly moves up and down toward the two fixed blocks 19 below, actively controlling the local bending of the left side of the low-voltage wiring harness, creating a stress concentration point, and obtaining corresponding tension data.

[0056] When the lifting assembly in the right clamp is working, the output end of the electric push rod 16 extends, and drives the clamping assembly on it to move up and down through the connecting plate 15, so that the clamping end of this clamping assembly moves up and down toward the two fixed blocks 19 above, forming a jacking effect on the low-voltage wire harness, simulating the low-voltage wire harness being jacked up by the unfixed bracket bolts, and testing the wear resistance of the sheath and the compressive strength of the wire.

[0057] When the clamping assembly is working, the two fixed blocks 19 are controlled to move closer to each other to clamp the low-voltage wiring harness between them, and cooperate with the lifting assembly to control the up and down movement of the clamping assembly to adjust the posture of the node formed by the low-voltage wiring harness, and fix the local node of the low-voltage wiring harness, thereby improving the accuracy of the simulation of the actual use of the low-voltage wiring harness.

[0058] When the two fixed blocks 19 are controlled to separate, the fixed block 19 moves the special-shaped card block 22, and the special-shaped card block 22 rotates around the connecting rod 23. The end away from the fixed block 19 is clamped on the drive shaft 21. At this time, the small motor 20 is started, and the output end of the small motor 20 drives the drive shaft 21 to rotate. The drive shaft 21 drives the rotating frame 18 and the fixed block 19 to rotate through the connecting rod 23. When the two fixed blocks 19 rotate, the low-voltage wire harness is twisted through contact with the low-voltage wire harness, which is convenient for torsion detection of the low-voltage wire harness and effectively avoids damage to the low-voltage wire harness. The pressure sensor 11 detects the reverse force of the low-voltage wire harness on the fixed block 19 and transmits it to the console 2. The console 2 receives this signal, controls the process of torsion detection, and obtains pressure data of torsion detection at the same time.

[0059] A method for dynamic multi-angle tension testing of a low-voltage wiring harness, using the above-mentioned dynamic multi-angle tension testing device for a low-voltage wiring harness, comprises the following steps: S1. Device adjustment: According to the specifications of the low-voltage wiring harness, adjust the position and height of the fixer, adjuster, and clamp to ensure accurate fit.

[0060] S2. Install the low-voltage wiring harness. Divide the low-voltage wiring harness into five nodes and connect them to two fixers, one regulator, and two clamps.

[0061] S3. Angle setting: adjust the height position of the five nodes to make the low-voltage harness form the required multi-angle state.

[0062] When adjusting the height positions at the five nodes, the positions of the fixer, adjuster and clamp are moved accordingly in a controlled manner to ensure the stability of the low-voltage wiring harness.

[0063] S4, tensile test, applies dynamic forces of pulling, rotating and twisting to the low-voltage harness at five nodes to simulate different working conditions.

[0064] S5 , data recording: the console 2 receives and records the data fed back by the tension sensor 17 and the pressure sensor 11 .

[0065] S6, state switching, adjust the angle parameters of S3, and repeat S4 and S5.

[0066] S7. Result analysis: Analyze the recorded data to evaluate the performance of the low-voltage wiring harness under multi-angle tension dynamic test conditions.

[0067] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A low-voltage wire harness multi-angle tension dynamic testing device, comprising a base (1), characterized in that: Also included is a device movably connected to the base (1): Two fixers, each of which comprises a slide frame (4) movably connected to a base (1), two slide frames (4) having opposite sides slidably connected to a sliding device (5), a side of the sliding device (5) away from the slide frame (4) being slidably connected to a rotating frame, a tension sensor (17) being installed between the sliding device (5) and the rotating frame, a rotatable chuck (6) being connected inside the rotating frame, and the two chucks (6) correspondingly clamping the two ends of the low-voltage wire harness; A regulator, comprising a lifter (10) movably connected to a base (1), a lifting end of the lifter (10) being a lifting plate (13), a fixed pulley (12) being rotatably connected to the lifting plate (13), and the fixed pulley (12) resting against a middle section of the low-voltage wiring harness; Two clamps, each comprising a lifting assembly movably connected to a base (1), an output end of the lifting assembly being fixedly connected to a clamping assembly, the two clamping assemblies being respectively located between the regulator and the two fixers and being clamped with the low-voltage wiring harness.

2. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 1, characterized in that: A terminal interface (24) is fixedly connected to the middle of the chuck (6), and the terminal interface (24) is plug-matched with a terminal of a low-voltage wiring harness.

3. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 2, characterized in that: A plurality of latch plates (3) are fixedly connected to the edge of the chuck (6), and the latch plates (3) are engaged with the low-voltage wiring harness.

4. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 3, characterized in that: The lifting assembly comprises a lifting frame (7) movably connected to a base (1), a slidable connecting block (9) being internally connected to the lifting frame (7), and a clamping assembly having a clamping end facing downward at the bottom of the connecting block (9).

5. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 4, characterized in that: A first sliding rod (8) is fixedly connected inside the lifting frame (7), and the connecting block (9) penetrates and is slidably connected to the first sliding rod (8).

6. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 5, characterized in that: Another lifting assembly comprises a movable frame movably connected to the base (1), an electric push rod (16) is mounted on the movable frame, an output end of the electric push rod (16) is fixedly connected to a connecting plate (15), and a top of the connecting plate (15) is fixedly connected to another clamping assembly, with the clamping end of the clamping assembly facing upward.

7. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 6, characterized in that: A plurality of second sliding rods (14) are fixedly connected to the movable frame, and the connecting plate (15) penetrates and is slidably connected to the plurality of second sliding rods (14).

8. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 7, characterized in that: The clamping assembly includes a small motor (20), two of the small motors (20) are respectively installed at the bottom of the connecting block (9) and the top of the connecting plate (15), the output end of the small motor (20) is rotatably connected to a rotating frame (18), and is coaxially fixedly connected to a drive shaft (21), the inner side of the rotating frame (18) is rotatably connected to two connecting rods (23), and the side away from the small motor (20) is connected to two movable fixed blocks (19), the connecting rod (23) is fixedly connected to a special-shaped card block (22), the two fixed blocks (19) are in one-to-one correspondence with the two special-shaped card blocks (22) and abut against each other, when the two fixed blocks (19) are away from each other, the special-shaped card block (22) is moved so that the end away from the fixed block (19) is engaged with the drive shaft (21), and a pressure sensor (11) is installed inside the fixed block (19), and the pressure sensor (11) is used to detect the extrusion force between the fixed block (19) and the low-voltage wiring harness.

9. The low-voltage wiring harness multi-angle tension dynamic testing device according to claim 8, characterized in that: A control console (2) is mounted on the base (1). The control console (2) is electrically connected to the sliding device (5), the chuck (6), the lifter (10), the pressure sensor (11), the electric push rod (16), the tension sensor (17), and the small motor (20), and is used to control the working state of each actuator and receive signals from each sensor.

10. A method for dynamic multi-angle tension testing of low-voltage wiring harnesses, characterized in that: Using the low-voltage wiring harness multi-angle tension dynamic testing device according to claim 9, comprising the following steps: S1. Device adjustment: adjust the position and height of the fixer, adjuster and clamp according to the specifications of the low-voltage wire harness to ensure accurate matching; S2. Install the low-voltage wiring harness. Divide the low-voltage wiring harness into five nodes and connect them to two fixers, one regulator, and two clamps. S3, angle setting, adjust the height position of the five nodes to make the low-voltage harness form the required multi-angle state; S4, tensile test, applies dynamic forces of pulling, rotating and twisting to the low-voltage harness at five nodes to simulate different working conditions; S5, data recording, the console (2) receives and records the data fed back by the tension sensor (17) and the pressure sensor (11); S6, state switching, adjust the angle parameters of S3, and repeat S4 and S5; S7. Result analysis: Analyze the recorded data to evaluate the performance of the low-voltage wiring harness under multi-angle tension dynamic test conditions.

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