Frame torsional fatigue test bench with loading device

Abstract

The invention provides a frame torsional fatigue test bench with a loading device, and belongs to a test bench for automobile part assemblies. The frame torsional fatigue test bench comprises a portal frame, two actuators, a torsion beam and the like, and is characterized in that a front simulated suspension, a rear simulated suspension, a subframe and a frame are installed according to the state of an actual automobile; the upper end of the loading device is installed on the subframe to load, the lower end of the loading device is connected to jacks and spiral springs, the spiral springs can generate bidirectional displacement deformation along with movements of the frame, and follow-up movements of the loading device and a connection part of the frame are ensured; and the jacks are connected with the loading device through a lever so as to transfer a load carrying force, and the torsion beam and the spiral springs are fixed. The frame torsional fatigue test bench can comprehensively evaluate the torsional reliability of a frame assembly, actual working conditions are simulated through the bench device, and a follow-up constraint problem between the frame and a finished automobile mass loading unit is solved by the simulated loading device, thereby enabling the conclusion of a frame torsional fatigue test to have more reference values. The frame torsional fatigue test bench is novel in structure and effectively solves a problem of difficult evaluation for a durability test in development of a heavy commercial vehicle frame assembly.

Description

technical field [0001] The invention belongs to a test stand for an assembly of auto parts, in particular to a frame torsion fatigue test stand with a loading device. Background technique [0002] The frame is a key component of a car, and its quality and performance directly affect the safety, ride comfort and comfort of the vehicle. Although modern design methods, such as CAD, optimal design, finite element analysis, etc., can evaluate the design quality of the frame at an early stage, due to the large size of the frame structure and the complexity of the force situation, the results of theoretical design and calculation are different from those in practice. , There are certain differences, which need to be continuously corrected and improved through the bench test in the later stage. The frame torsional fatigue test is a non-standard test. At present, domestic testing institutions can only conduct no-load torsion tests on the frame assembly. The stress state of the sampl...

AI Technical Summary

Problems solved by technology

Although modern design methods, such as CAD, optimal design, finite element analysis, etc., can evaluate the design quality of the frame at an early stage, due to the large size of the frame structure and the complexity of the force situation, the results of theoretical design and calculation are different from those in practice. , There are certain differences, and it needs to be continuously corrected and improved through the later bench test

The frame torsional fatigue test is a non-standard test. At present, domestic testing institutions can only conduct no-load torsion tests on the frame assembly. The stress state of the sample is quite different from the working state on the real vehicle. There are certain differences in the test method and evaluation system. One-sidedness, unable to meet the requirements for accurate evaluation of the reliability of the frame assembly

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