Parallel dynamic stiffness experiment table

Abstract

The invention provides a parallel dynamic stiffness experiment table. The parallel dynamic stiffness experiment table comprises an installation base, a force sensor, a supporting block, a parallel type clamp, a connecting piece, a vibration exciter and an acceleration sensor device. The whole parallel dynamic stiffness experiment table is installed in a suspended mode. The installation base is used for connecting the whole experiment table to a pressure testing machine. The installation base is provided with the force sensor connected with one end of the supporting block, the other end of the supporting block is connected with the parallel type clamp, the parallel type clamp is of a U-shaped structure and comprises two clamping parts, a reinforcing rib plate is welded into the parallel type clamp, the whole parallel type clamp is made of steel and can clamp two rubber tested pieces at the same time, the installation direction of the parallel type clamp can be changed, the connecting piece is arranged between the two clamping parts, and the two clamping parts are connected with the vibration exciter and the acceleration sensor device through the connecting piece. The parallel dynamic stiffness experiment table is reasonable in structural design, low in manufacturing cost and good in detecting effect.

Description

technical field [0001] The invention relates to the field of mechanical vibration and impact, in particular to a parallel linkage stiffness test bench. Background technique [0002] With the continuous development of NVH technology in China, rubber shock absorbers, as the most cost-effective shock-absorbing equipment, are widely used by many companies. The dynamic characteristic parameter of the shock absorber is an important index to measure the performance of the automobile mount. At present, the dynamic characteristics of the rubber mount are tested mainly by simulating the excitation conditions of the rubber mount on the test bench, and studying the vibration of the rubber mount at different excitation frequencies. And the dynamic characteristic parameters under the excitation amplitude, so as to obtain the dynamic stiffness value under different frequencies and different amplitudes. [0003] The existing experimental methods at home and abroad are basically to complete...

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Problems solved by technology

[0003] The existing experimental methods at home and abroad are basically to complete the experiment through the cooperation of the hydraulic testing machine and the actuator. However, the current technology generally uses a single suspension device to perform a one-way stiffness test, and does not consider other factors during the test. The influence of direction on vibration, and because of the complex structure, installation and disassembly are very troublesome, which is not conducive to use and maintenance

Moreover, this kind of equipment can only test the stiffness of one rubber part at a time. During the repeated clamping process, it may cause excessive bending and torsion of the rubber, and deformation will affect the dynamic stiffness test results.

Because the rubber mount is basically only subjected to vertical vibration excitation when used as a shock absorber, if the experimental data is distorted due to clamping problems during the experimental test, the collected data will have a large error , resulting in inaccurate test results, which will affect the actual performance of the product, prone to omissions, and make unqualified products leave the factory

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