Jig for cable flexibility test

Abstract

The utility model provides a kind of for cable softness test's fixture, comprising: bottom plate;Clamping component, be set on the bottom plate, for fixing the one end of cable;Bending wheel component, be set on the bottom plate, for bending the cable, including first runner, adjusting lever and second runner;Wherein, the first runner is fixed on the bottom plate, the adjusting lever one end with the pivot of the first runner rotates, the second runner is fixed on the middle part of the adjusting lever, and form cable passage between the first runner;Torque measuring piece, the torque measuring piece is located the other end of the adjusting lever.The utility model uses it is '' dynamic bending+torque conduction '' design, bending wheel component can realize the dynamic bending of cable, torque measuring piece is configured with bending wheel component to realize torque conduction, torque value can be read by torque measuring piece, and the softness of cable can be quantified according to the size of torque value.

Description

Technical Field

[0001] This utility model relates to a fixture, and more particularly to a fixture for testing the flexibility of cables. Background Technology

[0002] In the fields of cable production, selection, and engineering installation, the flexibility of cables is a key indicator affecting their ease of construction and installation reliability. This is especially true in scenarios where wiring needs to be done with the minimum bending radius (such as in narrow spaces or inside equipment), where flexibility directly determines the difficulty of installation and the risk of stress damage during long-term use.

[0003] However, current technologies for assessing cable flexibility primarily rely on subjective human judgment: installers manually bend the cable, relying on experience to gauge the required force and thus determine whether it is "too stiff" or "too soft." This method has significant limitations, lacking quantitative standards. Furthermore, the large differences in judgment values ​​among different personnel lead to inconsistent assessment results, making it impossible to establish a unified standard for quality or selection. In addition, while some general-purpose material hardness testing equipment exists (such as Shore hardness testers), these devices mainly target the static hardness of the material itself and cannot simulate the dynamic process of cable installation, nor can they quantify the force required during this process. Therefore, they cannot meet the specific testing needs for cable flexibility. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a fixture specifically for testing cable flexibility. By quantifying the torque value during the bending process, it enables an objective and accurate assessment of the cable's flexibility at the minimum bending radius, providing a basis for cable development in the early stages and installation in the later stages.

[0005] To achieve the above objectives, this utility model provides a fixture for testing cable flexibility, comprising:

[0006] Base plate;

[0007] A clamping assembly, disposed on the base plate, is used to fix one end of the cable;

[0008] A bending wheel assembly, disposed on the base plate, is used to bend the cable and includes a first rotating wheel, an adjusting rod, and a second rotating wheel; wherein, the first rotating wheel is fixed to the base plate, one end of the adjusting rod rotates about the axis of the first rotating wheel, and the second rotating wheel is fixed to the adjusting rod and forms a cable channel between the second rotating wheel and the first rotating wheel;

[0009] A torque measuring element is located at the other end of the adjusting rod.

[0010] Optionally, the base plate is provided with a scale within the range of rotation of the adjusting rod.

[0011] Optionally, the clamping assembly includes a fixing member and an extension member. The fixing member is used to fix the end of the cable, and the extension member is located between the fixing member and the first rotating wheel to guide the extension direction of the cable to the outer periphery of the first rotating wheel.

[0012] Optionally, the diameter of the first rotating wheel is twice the minimum bending radius of the cable, and is larger than the diameter of the second rotating wheel.

[0013] Optionally, the cable channel formed between the first and second rollers is no more than twice the outer diameter of the cable.

[0014] Optionally, the torque measuring device is a torque wrench with data display.

[0015] Optionally, the fixture used for cable flexibility testing is suitable for cables with an outer diameter of 10mm-50mm.

[0016] The fixture for cable flexibility testing provided by this invention adopts a "dynamic bending + torque transmission" design. The bending wheel assembly enables dynamic bending of the cable, and the torque measuring device, configured with the bending wheel assembly, transmits torque. The torque measuring device reads the torque value, and the cable flexibility can be quantitatively judged based on the magnitude of the torque value. Therefore, this invention achieves cable flexibility testing in a dynamic scenario combined with quantified torque. Attached Figure Description

[0017] Figure 1 This is a front view of the fixture for testing cable flexibility according to this utility model;

[0018] Figure 2 This is a perspective view of the fixture for testing the flexibility of cables according to this utility model. Detailed Implementation

[0019] like Figure 1 and Figure 2 As shown, this utility model provides a fixture for testing the flexibility of cables, including a base plate 10, a clamping assembly 20, a bending wheel assembly 30, and a torque measuring component 40.

[0020] The base plate 10 is a square plate structure with graduations along the sliding range of the bending wheel assembly 30. These graduations 11 are used to precisely control the bending angle of the cable, such as bending at 10° or 50°.

[0021] The clamping assembly 20, mounted on the base plate 10, is used to mechanically clamp / lock one end of the cable, forcibly restraining the portion of the cable other than the test end to remain stationary, providing a "fixed reference end" for bending tests, and ensuring that bending deformation only acts on the target segment. In the figure, the clamping assembly 20 includes two parts: a fixing member 21 and an extension member 22. The fixing member 21 clamps and fixes one end of the cable on the base plate 10, located at one edge of the base plate 10. The extension member 22 serves both to clamp and fix the cable and to act as a guide. The extension member 22 is located between the fixing member 21 and the bending wheel assembly 30, guiding the test portion of the cable clamped by the fixing member 21 to the outer periphery of the bending wheel assembly 30. Both the fixing member 21 and the extension member 22 have adjustment functions to clamp cables of different outer diameters. For example, in the figure, both the fixing member 21 and the extension member 22 are divided into upper and lower parts; the upper and lower clamping action of these two parts can clamp and fix different cables. The fixture for testing cable flexibility provided by this utility model is applicable to cables with an outer diameter of 10mm-50mm.

[0022] A bending wheel assembly 30, mounted on the base plate 10, is used to induce bending deformation in the cable. The bending wheel assembly 30 includes a first rotating wheel 31, an adjusting rod 32, and a second rotating wheel 33. The first rotating wheel 31 is fixed to the base plate 10, and its diameter is twice the minimum bending radius of the cable, larger than the diameter of the second rotating wheel 33. Therefore, it ensures that the cable can be bent around the first rotating wheel 31 with the minimum bending radius. The adjusting rod 32 is used to adjust the bending direction of the cable, and one end is connected to the shaft of the first rotating wheel 31. The adjusting rod 32 is equipped with the second rotating wheel 33, and the channel between the second rotating wheel 33 and the first rotating wheel 31 serves as a cable passage for the cable to pass through; the cable passage formed between the first rotating wheel 31 and the second rotating wheel 33 is no greater than twice the outer diameter of the cable. The outer circumferences of both the first rotating wheel 31 and the second rotating wheel 33 are without grooves to provide the necessary force points for bending.

[0023] Specifically, after passing through the extension member 22, the cable continues to extend along the outer periphery of the first rotating wheel 31, and then passes through the cable channel between the first rotating wheel 31 and the second rotating wheel 33. The rotation of the adjusting rod 32 causes the outer periphery of the second rotating wheel 33 to provide the resistance required for cable bending. Therefore, the bending wheel assembly 30, as an "active bending actuator," uses a wheel design that conforms to the cable profile and the scale 11 on the base plate 1 to precisely control the cable bending angle, simulating the degree of bending during actual installation, while simultaneously converting the bending resistance into torque and transmitting it to the torque measuring element 40.

[0024] The torque measuring element 40 is a torque wrench with a digital display. The torque wrench is located at the other end of the adjusting rod 32. When the bending resistance is converted into torque and transmitted to the torque wrench, the cable can bend around the first wheel 31 with the minimum bending radius. The torque wrench can collect and display the torque data transmitted by the bending wheel assembly 30 at different bending angles in real time, converting physical resistance into a quantitative hardness index, that is, the larger the torque value, the "harder" the cable is.

[0025] It should be noted that the above only describes the specific mechanism of the fixture used for cable flexibility testing. Different outer diameter cables require corresponding fixtures. As mentioned above, the diameter of the first wheel of the bending wheel assembly is determined by the cable's minimum bending radius; therefore, a suitable fixture is matched according to the cable's minimum bending radius.

[0026] When using this utility model, the workflow is divided into several processes: fixing, bending, measuring torque, and outputting data, wherein:

[0027] Fixing phase: The base plate 10 provides a stable base, and the clamping assembly 20 clamps one end of the cable, constraining the "non-test section" of the cable to be stationary, thus establishing a benchmark for the bending test;

[0028] Bending stage: The cable passes through the cable channel between the first rotating wheel 31 and the second rotating wheel 33. After rotating the adjusting rod 32, the bending wheel assembly 30 controls the second rotating wheel 33 to push the cable with the minimum bending radius through the scale 11 of the base plate 10. The cable generates a "reaction force" resistance due to deformation, which is converted into torque through the bending stage and transmitted to the torque wrench.

[0029] Torque measurement stage: At different bending angles, the torque wrench captures the torque value in real time. This value directly corresponds to the "flexibility of the cable at the minimum bending radius". The greater the torque, the higher the stiffness.

[0030] Data output: The torque wrench displays the final stable torque value, which serves as the quantitative basis for cable stiffness, completing the test closed loop.

[0031] In summary, this invention redefines the "cooperative relationship" between the various components, integrating them from "disparate functional parts" into a "cable hardness quantification testing system." Through the dynamic bending and torque transmission design of the bending wheel assembly 30, the torque wrench is transformed from a general-purpose measurement tool into a new application for quantifying cable hardness. Therefore, compared to traditional hardness testing (such as Shore hardness testers) that only measures "static material hardness," this invention achieves cable installation scenario flexibility testing through dynamic scenarios (at the minimum bending radius) and quantified torque, providing a reliable basis for cable early-stage development and later-stage engineering installation.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A fixture for testing the flexibility of cables, characterized in that, include: Base plate; A clamping assembly, disposed on the base plate, is used to fix one end of the cable; A bending wheel assembly, disposed on the base plate, is used to bend the cable and includes a first rotating wheel, an adjusting rod, and a second rotating wheel; wherein, the first rotating wheel is fixed to the base plate, one end of the adjusting rod rotates about the axis of the first rotating wheel, and the second rotating wheel is fixed to the adjusting rod and forms a cable channel between the second rotating wheel and the first rotating wheel; A torque measuring element is located at the other end of the adjusting rod.

2. The fixture for testing cable flexibility according to claim 1, characterized in that, The base plate is provided with graduations within the range of rotation of the adjusting rod.

3. The fixture for testing cable flexibility according to claim 1, characterized in that, The clamping assembly includes a fixing member and an extension member. The fixing member is used to fix the end of the cable, and the extension member is located between the fixing member and the first rotating wheel to guide the extension direction of the cable to the outer periphery of the first rotating wheel.

4. The fixture for testing cable flexibility according to claim 1, characterized in that, The diameter of the first rotating wheel is twice the minimum bending radius of the cable and is larger than the diameter of the second rotating wheel.

5. The fixture for testing cable flexibility according to claim 4, characterized in that, The cable channel formed between the first and second reels shall not exceed twice the outer diameter of the cable.

6. The fixture for testing cable flexibility according to claim 1, characterized in that, The torque measuring device is a torque wrench with data display.

7. The fixture for testing cable flexibility according to any one of claims 1 to 6, characterized in that, The fixture used for cable flexibility testing is suitable for cables with an outer diameter of 10mm-50mm.

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