Automobile wire harness tensile testing device

Abstract

The utility model provides a kind of automobile wire harness tensile test device, it is related to automobile wire harness detection technical field, including detection table, the upper portion of detection table is provided with transverse tensile detection mechanism, transverse tensile detection mechanism includes support block, the lower end of two support blocks is symmetrically distributed and the upper end of detection table is fixedly connected, the inner wall of support block is fixedly installed with first servo electric cylinder, and the one end of first servo electric cylinder piston rod is fixedly installed with tension sensor, in transverse detection, first servo electric cylinder, tension sensor cooperate U type mounting block, arc clamping block, accurate measure transverse tension, clamping firm and adapt to different wire harness, and longitudinal detection relies on servo motor, screw drive moving plate, second servo electric cylinder linkage extruding wheel, adjust detection position as needed, extruding wheel camber surface scratchproof, realize the automatic tensile detection of wire harness multiple positions, multiple directions, convenient operation, not only reduce manual labor, and improve the effect of detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive wiring harness testing technology, and in particular to an automotive wiring harness tensile testing device. Background Technology

[0002] Automotive wiring harnesses are the main network of automotive circuits; without wiring harnesses, there would be no automotive circuits. A wiring harness refers to an assembly formed by crimping copper contact terminals with wires and cables, then molding an insulator or adding an outer metal shell, and bundling the wires together to form a circuit connection. During the production process of automotive wiring harnesses, tensile strength tests are performed on the manufactured wire harnesses. Existing equipment for testing the tensile strength of wiring harnesses can only perform straightening tests. After straightening, lateral force cannot be applied to the taut wire harness, resulting in incomplete testing results.

[0003] For example, a Chinese patent document discloses an automotive wiring harness tensile strength testing device (publication number: CN221550268U). This patent, when testing the tensile strength of automotive wiring harnesses, fixes both ends of the wiring harness to an upper clamp and a lower clamp respectively. The upper clamp is moved upward by the telescopic end of the first electric telescopic rod to perform tensile testing on the wiring harness. After the wiring harness has been longitudinally tensile tested, the push rod is moved laterally by the second electric telescopic rod installed on one side of the slide. The laterally moving push rod applies lateral force to the taut wiring harness, thus achieving lateral force tensile testing of the wiring harness. Compared with traditional tensile strength testing devices, this automotive wiring harness tensile strength testing device provides a more comprehensive test of the wiring harness.

[0004] However, when performing lateral tensile testing, the device can only test one part of the wire harness at a time. If you want to change the test position, you have to manually loosen the fixing bolts, adjust the height of the slide, and then fix it with the fixing bolts again. The whole process is cumbersome and cannot efficiently cover the testing needs of the entire wire harness, which seriously reduces the testing efficiency. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the need for frequent manual adjustments to the position during transverse tension testing of wire harnesses, which is cumbersome and reduces testing efficiency.

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

[0007] A tensile testing device for automotive wiring harnesses includes a testing platform, and a transverse tensile testing mechanism is provided above the testing platform.

[0008] The transverse tensile testing mechanism includes support blocks. The lower ends of the two support blocks are symmetrically distributed and fixedly connected to the upper end of the testing platform. A first servo electric cylinder is fixedly installed on the inner wall of the support block. A tension sensor is fixedly installed at one end of the piston rod of the first servo electric cylinder. A U-shaped mounting block is fixedly connected to one side of the tension sensor. A guide rod that is symmetrically distributed is fixedly connected to one side of the U-shaped mounting block. One end of each of the two guide rods passes through and extends to one side of the support block.

[0009] A longitudinal tensile testing mechanism is installed above the testing platform.

[0010] Preferably, the inner bottom wall of the U-shaped mounting block is fixedly connected to a first arc-shaped clamping block, the two ends of the first arc-shaped clamping block are provided with symmetrically distributed clearance grooves, and the upper end of the U-shaped mounting block is provided with a threaded hole.

[0011] Preferably, the inner wall of the threaded hole is threaded with a hand-tightening screw, one end of which is rotatably connected to a second arc-shaped clamping block via a bearing, and the upper end of the second arc-shaped clamping block is fixedly connected to symmetrically distributed limiting rods.

[0012] Preferably, one end of each of the two limiting rods passes through and extends above the U-shaped mounting block, and anti-slip pads are provided on the inner sides of both the second arc-shaped clamping block and the first arc-shaped clamping block.

[0013] Preferably, the longitudinal tensile testing mechanism includes slide rails, the lower ends of the two slide rails are symmetrically distributed and fixedly connected to the upper end of the testing platform, and a movable sleeve is slidably sleeved on the outside of the slide rails.

[0014] Preferably, a movable plate is fixedly connected to the upper end of each of the two movable sleeves, and a second servo electric cylinder is fixedly installed on the upper end of the movable plate. A lifting platform is fixedly connected to one end of the piston rod of the second servo electric cylinder, and uprights that are symmetrically distributed are slidably sleeved on the inner wall of the lifting platform.

[0015] Preferably, the lower ends of both uprights are fixedly connected to the upper end of the movable plate, the upper end of the lifting platform is fixedly connected to a support, the inner walls on both sides of the support are rotatably connected to extrusion wheels through bearings, and a servo motor is fixedly installed on the inner bottom wall of the testing platform.

[0016] Preferably, the output shaft of the servo motor is fixedly mounted with a lead screw via a coupling. One end of the lead screw is rotatably connected to the inner wall of one side of the testing platform via a bearing. A stroke groove is provided above the testing platform. A threaded block is slidably connected to the inner wall of the stroke groove. The inner wall of the threaded block is threadedly connected to the outer thread of the lead screw. The upper end of the threaded block is fixedly connected to the lower end of the moving plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In this invention, during lateral detection, a first servo electric cylinder and a tension sensor, in conjunction with a U-shaped mounting block and an arc-shaped clamping block, accurately measure lateral tension, providing stable clamping and adaptability to different wire harnesses. For longitudinal detection, a servo motor and a lead screw drive the moving plate, while a second servo electric cylinder, linked to a pressing wheel, adjusts the detection position as needed. The curved surface of the pressing wheel prevents scratches, achieving automated multi-part, multi-directional tensile testing of the wire harness. This convenient operation not only reduces manual labor but also improves testing efficiency. Attached Figure Description

[0019] Figure 1 A schematic diagram of the main structure of an automotive wiring harness tensile testing device provided by this utility model;

[0020] Figure 2 A three-dimensional view of the testing platform structure of an automotive wiring harness tensile testing device provided by this utility model;

[0021] Figure 3 A perspective view of the lifting platform structure of an automotive wiring harness tensile testing device provided by this utility model;

[0022] Figure 4 A three-dimensional view of a U-shaped mounting block structure for an automotive wiring harness tensile testing device provided by this utility model;

[0023] Figure 5 An exploded view of the U-shaped mounting block structure of an automotive wiring harness tensile testing device provided by this utility model.

[0024] Legend: 1. Testing table; 2. Support block; 21. First servo electric cylinder; 22. Tension sensor; 23. U-shaped mounting block; 24. Guide rod; 25. First arc-shaped clamping block; 26. Clearance groove; 27. Threaded hole; 28. Hand-tightening screw; 29. ​​Second arc-shaped clamping block; 210. Limiting rod; 211. Anti-slip pad; 3. Slide rail; 31. Moving sleeve; 32. Moving plate; 33. Second servo electric cylinder; 34. Lifting platform; 35. Upright pole; 36. Support; 37. Extrusion wheel; 38. Servo motor; 39. Lead screw; 310. Stroke groove; 311. Threaded block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0029] like Figures 1-5 As shown, this utility model provides a technical solution: an automotive wiring harness tensile testing device, including a testing platform 1. The testing platform 1 is made of high-strength aluminum alloy profile, which enables it to provide a solid and stable base for the transverse and longitudinal testing mechanisms.

[0030] The surface of the testing station 1 is anodized, which gives it excellent wear and corrosion resistance. It can withstand the corrosion of oil, water vapor and other substances that may be encountered in the automotive wiring harness testing environment, thus ensuring the accuracy of the equipment during long-term operation.

[0031] The first servo electric cylinder 21 installed inside the support block 2 has a stepless speed regulation function. When testing different types and specifications of automotive wiring harnesses, the stretching speed can be flexibly adjusted according to actual needs to simulate different stress conditions of the wiring harness in actual automotive operation.

[0032] The tension sensor 22 can collect tensile force data in real time, with a range of 0-500N and an accuracy of 0.5%FS. During the testing process, the tension sensor 22 works in conjunction with the linear movement of the U-shaped mounting block 23, and the guide rod 24 ensures the coaxiality of the U-shaped mounting block 23 during its movement, resulting in uniform force distribution on the wiring harness during lateral stretching. This precise testing method greatly improves the accuracy of the test data and provides a reliable basis for judging the quality of automotive wiring harnesses.

[0033] The first arc-shaped clamping block 25 and the second arc-shaped clamping block 29 of the U-shaped mounting block 23 adopt a semi-circular fitting design. The setting of the clearance groove 26 reserves clamping space. When clamping wire harnesses of different diameters, the second arc-shaped clamping block 29 can move within the space of the clearance groove 26 to ensure the smooth operation of clamping.

[0034] The hand-tightening screw 28 is connected to the second arc-shaped clamp 29 via a bearing. When the hand-tightening screw 28 is rotated, the second arc-shaped clamp 29 can be driven to move downward to clamp the wire harness placed on the first arc-shaped clamp 25. The limiting rod 210 can ensure that the first arc-shaped clamp 25 and the second arc-shaped clamp 29 are aligned, ensuring that the wire harness is in the center position during clamping and the force is even. The anti-slip pad 211 is made of Shore A hardness 70A material, which increases the friction with the wire harness during clamping and can effectively prevent the wire harness from sliding during tensile testing, thereby ensuring that the tensile force is fully applied to the wire harness body during testing and ensuring the authenticity of the test results.

[0035] Servo motor 38 drives lead screw 39 to rotate. The rotation of lead screw 39 causes threaded block 311 to move linearly along stroke groove 310. When threaded block 311 moves, it will drive moving plate 32 and longitudinal detection component moving sleeve 31 to move along slide rail 3, thereby realizing automatic adjustment of longitudinal detection position.

[0036] Compared to traditional manual adjustment methods, this automated adjustment improves efficiency. In automotive wiring harness testing, it can cover the entire wiring harness, such as testing different locations like 50mm from the end point or halfway through the harness, meeting the needs of multi-site testing and enabling a more comprehensive evaluation of the wiring harness's tensile strength performance.

[0037] The second servo electric cylinder 33 pushes the lifting platform 34 up and down along the upright 35. The extrusion wheel 37 in the support 36 is a polyurethane roller. The arc design of the extrusion wheel 37 can completely fit the surface of the wire harness. When applying longitudinal force to the upper wire harness, it can disperse the pressure and avoid the problem of scratching the wire harness insulation layer due to excessive local pressure.

[0038] The working process of this utility model:

[0039] Step 1: Place both ends of the wire harness into the first arc-shaped clamping block 25 of the U-shaped mounting block 23, turn the hand screw 28 to move the second arc-shaped clamping block 29 down, and clamp the wire harness with the first arc-shaped clamping block 25. The anti-slip pad 211 enhances friction and prevents slippage, the limiting rod 210 ensures alignment during clamping, and the second arc-shaped clamping block 29 can be inserted deeper through the relief groove 26, which makes it easier to clamp and fix wire harnesses of different sizes.

[0040] Step two: Activate the first servo electric cylinder 21 to retract, pulling the U-shaped mounting block 23. The tension sensor 22 displays the tension value in real time, detecting the lateral tension strength of the wire harness. The guide rod 24 ensures smooth movement, completing the lateral detection. Then, according to the longitudinal detection position requirements, activate the servo motor 38 to drive the lead screw 39 to rotate. The threaded block 311 moves along the stroke groove 310, moving the moving plate 32 and the longitudinal detection component to the appropriate position. Adjust the moving sleeve 31 to fit the wire harness at the slide rail 3 position. Activate the second servo electric cylinder 33, extending the piston rod to push the lifting platform 34 up along the upright 35. The extrusion wheel 37 contacts the designated position of the wire harness and applies force, causing the wire harness to be longitudinally stretched, simulating the situation in actual use. The curved surface is used to avoid scratching the wire harness. Detect the longitudinal tensile strength. After completion, reset the component. The operation can be repeated to detect different parts.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tensile testing device for automotive wiring harnesses, comprising a testing platform (1), characterized in that: A transverse tensile testing mechanism is provided above the testing table (1); The transverse tensile testing mechanism includes a support block (2). The lower ends of the two support blocks (2) are symmetrically distributed and fixedly connected to the upper end of the testing platform (1). A first servo electric cylinder (21) is fixedly installed on the inner wall of the support block (2). A tension sensor (22) is fixedly installed at one end of the piston rod of the first servo electric cylinder (21). A U-shaped mounting block (23) is fixedly connected to one side of the tension sensor (22). A guide rod (24) is symmetrically distributed and fixedly connected to one side of the U-shaped mounting block (23). One end of each of the two guide rods (24) passes through and extends to one side of the support block (2). A longitudinal tensile testing mechanism is provided above the testing platform (1).

2. The automotive wiring harness tensile testing device according to claim 1, characterized in that: The inner bottom wall of the U-shaped mounting block (23) is fixedly connected to a first arc-shaped clamping block (25), and the two ends of the first arc-shaped clamping block (25) are provided with symmetrically distributed clearance grooves (26), and the upper end of the U-shaped mounting block (23) is provided with a threaded hole (27).

3. The automotive wiring harness tensile testing device according to claim 2, characterized in that: The inner wall of the threaded hole (27) is threaded with a hand-tightening screw (28). One end of the hand-tightening screw (28) is rotatably connected to a second arc-shaped clamp (29) via a bearing. The upper end of the second arc-shaped clamp (29) is fixedly connected with symmetrically distributed limiting rods (210).

4. The automotive wiring harness tensile testing device according to claim 3, characterized in that: One end of each of the two limiting rods (210) passes through and extends above the U-shaped mounting block (23), and anti-slip pads (211) are provided on the inner sides of the second arc-shaped clamping block (29) and the first arc-shaped clamping block (25).

5. The automotive wiring harness tensile testing device according to claim 1, characterized in that: The longitudinal tensile testing mechanism includes a slide rail (3), the lower ends of the two slide rails (3) are symmetrically distributed and fixedly connected to the upper end of the testing table (1), and a movable sleeve (31) is slidably sleeved on the outside of the slide rail (3).

6. The automotive wiring harness tensile testing device according to claim 5, characterized in that: The upper ends of the two movable sleeves (31) are fixedly connected to movable plates (32), and the upper ends of the movable plates (32) are fixedly installed with second servo electric cylinders (33). One end of the piston rod of the second servo electric cylinder (33) is fixedly connected to a lifting platform (34), and the inner wall of the lifting platform (34) is slidably sleeved with uprights (35) distributed in a symmetrical manner.

7. The automotive wiring harness tensile testing device according to claim 6, characterized in that: The lower ends of the two uprights (35) are fixedly connected to the upper end of the moving plate (32), and the upper end of the lifting platform (34) is fixedly connected to a support (36). The inner walls on both sides of the support (36) are rotatably connected to extrusion wheels (37) through bearings. The inner bottom wall of the testing platform (1) is fixedly installed with a servo motor (38).

8. The automotive wiring harness tensile testing device according to claim 7, characterized in that: The output shaft of the servo motor (38) is fixedly mounted with a lead screw (39) via a coupling. One end of the lead screw (39) is rotatably connected to the inner wall of one side of the testing platform (1) via a bearing. A stroke groove (310) is provided above the testing platform (1). A threaded block (311) is slidably connected to the inner wall of the stroke groove (310). The inner wall of the threaded block (311) is threadedly connected to the outer thread of the lead screw (39). The upper end of the threaded block (311) is fixedly connected to the lower end of the moving plate (32).

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