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Device and method for testing pull torque

A testing device, testing method technology, applied in the direction of measuring device, testing material strength with applied stable torsion force, testing material strength with applied stable tension/pressure, etc.

Inactive Publication Date: 2013-10-09
ELECTROMECHANICAL PRODS DETECTING TECH CENT OF SHANGHAI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Another potential risk that has not been noticed is the cord anchorage, which is unreliable and can pull the cord too far out of the appliance, causing internal terminal blocks to Under stress, for a long time will lead to open circuit and make the whole machine unable to work
In extreme cases, the exposure of live parts of the power cord directly affects personal safety

Method used

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  • Device and method for testing pull torque
  • Device and method for testing pull torque

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The embodiment of the present invention provides a kind of tensile torsion testing device, such as figure 1 and figure 2 As shown, it includes a pull-torsion test platform 1, a power cord fixing device 2, a weight assembly 3, and a lifting and rotating device 4. Lower end of platform 1;

[0039] Wherein the power cord fixing device 2 is used for fixing the power cord to be tested;

[0040] The weight assembly 3 is connected with the power line to be tested and provides a pull-down force for it;

[0041] Lifting and rotating device 2: installed directly below the weight assembly 3, it has a certain vertical lifting stroke, when it rises to a certain height, it lifts the weight assembly 3 and bears the weight of the weight assembly 3; it descends to a certain height When disengaged from the weight assembly 3, the weight assembly 3 is suspended on the power line; the lifting and rotating device 4 drives the weight assembly 3 to rotate through rotation, and the rotatio...

Embodiment 2

[0050] The embodiment of the present invention provides a kind of tensile torsion test method, the device used in it is as figure 1and figure 2 As shown, it includes the following steps:

[0051] Fix the power cord to be tested on the pull-torsion test platform 1 through the power cord fixing device 2;

[0052] Configure the weight of the weight assembly 3 according to the pressure to be applied, connect the configured weight assembly 3 to the power cord, and place the weight assembly 3 connected to the power cord on the lifting and rotating device 4;

[0053] Rotate the lifting and rotating device 4 according to the test needs to make the power cord be in the required state to be tested. When a pull test is required, the lifting and rotating device 4 rotates until the power cord is in a twist-free state; the power cord in a twist-free state is It is in a relaxed state in the horizontal direction, and the power cord has not been twisted at any angle;

[0054] The lifting ...

Embodiment 3

[0058] The embodiment of the present invention provides a tensile torsion testing method, which adopts a device such as figure 1 and figure 2 As shown, the method includes the following steps:

[0059] Fix the power cord to be tested on the pull-torsion test platform 1 through the power cord fixing device 2;

[0060] Configure the weight of the weight assembly 3 according to the pressure to be applied, connect the configured weight assembly 3 to the power cord, and place the weight assembly 3 connected to the power cord on the lifting and rotating device 4;

[0061] Rotate the lifting and rotating device 4 according to the test needs to make the power cord be in the required state to be tested. When a pull-torque test is required, the lifting and rotating device 4 rotates until the power cord is in a fully twisted state. The fully twisted state refers to the continuous twisting of the power cord in a single direction to the maximum in the untwisted state. Continued twistin...

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Abstract

The invention relates to a device for testing the pull torque, and the device comprises a pull torque test platform, a power line fixing device, a weight assembly and a lifting rotary device. The power line fixing device is arranged at the upper end of the pull torque test platform, while the lifting rotary device is arranged at the lower end of the pull torque test platform. A to-be-tested power line is fixed on the pull torque test platform via the power line fixing device. The operation method comprises the following steps: configuring the weight of the weight assembly according to the pressure to be applied, connecting the configured weight assembly with the power line, and placing the weight assembly connected with the power line on the lifting rotary device; rotating the lifting rotary device as required by the test to enable the power line at a required to-be-tested state; reciprocating the lifting rotary device to finish multiple times of pull torque tests of the power line at the to-be-tested state. The device is simple in operation and good in test reproducibility by using weight for testing. Meanwhile, the test tension and torque are applied more uniformly.

Description

technical field [0001] The invention relates to the field of strength testing of power cords for household appliances, in particular to a tension and torsion test device and a test method capable of simultaneously performing a tension test and a torsion test. Background technique [0002] As one of the necessary components of household appliances, the quality of the power cord directly affects the safety performance of the whole machine. In order to save costs, many manufacturers often use fake and shoddy power cords instead of genuine ones. If the quality of the power cord is not good enough, the cross-sectional area of ​​the wire is too small, the copper content is low, the power cord will become hot and prematurely aged after long-term use, and in severe cases, it will cause a short circuit of the power supply and cause safety problems. [0003] Another unnoticed potential risk is the power cord anchorage. Unreliable power cord anchorage can pull the power cord excessive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/22G01N3/00
Inventor 倪奕麟徐胜倪斌彭莉
Owner ELECTROMECHANICAL PRODS DETECTING TECH CENT OF SHANGHAI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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