Fatigue durability test device and method for multi-link rear suspension axle housing assembly

Abstract

The invention relates to a fatigue endurance testing device and method for a multi-link rear suspension axle housing assembly. A tire of a multi-link rear suspension assembly is arranged and fixed ona tray on the top of an actuating support member. A left horizontal reaction force seat and a right horizontal reaction force seat are fixed on an iron floor, and upper and lower control arm members are fixed on the horizontal reaction force seats to fix an upper control arm and a lower control arm respectively. Four columns are fixed on the iron floor, wherein spring fixing parts are fixed on twoof the columns, and springs are fixed on the spring fixing parts and are adjusted in height through sliding grooves. Shock absorber fixing parts are fixed on another two columns, and shock absorbersare fixed on the shock absorber fixing parts and are adjusted in height through sliding grooves. The fatigue endurance testing device and method realize durability testing of the shock absorbers, thesprings, the upper and lower control arms and other components and can provide real and reliable experimental data for design and fatigue service life analysis of a multi-link axle housing assembly, thereby reducing the development cycle of the multi-link axle housing assembly, saving cost, etc.

Description

technical field [0001] The invention relates to the technical field of durability testing of automobile chassis, in particular to a fatigue durability testing device and method of a multi-link rear suspension axle housing assembly. Background technique [0002] The function of the car drive axle housing is to support and protect the main reducer, differential and half shafts, etc. The axle housing ensures that the axial relative position of the wheels is fixed, and during the driving process of the car, it bears the force and bending moment transmitted by the tires. [0003] In the process of fatigue endurance simulation and iterative model building, index parameters such as fatigue endurance, roll stiffness, and strength of the axle housing assembly are required. The existing fatigue durability test device of the axle housing is to simulate the working state of the axle housing assembly on the road by applying the load (sine wave) road spectrum data to the axle housing reci...

AI Technical Summary

Problems solved by technology

[0005] 1. Weaken the impact of the upper control arm, lower control arm, shock absorber and other buffer parts on the durability test of the multi-link axle housing assembly;

[0006] 2. Weaken the influence of unsprung mass such as tires and brake drum assemblies on the test of multi-link axle housing assembly;

[0007] 3. The road spectrum data loaded by the actuator is iterative data, which needs to be converted through multiple iterations. There will be certain deviations in the multiple conversion data, so the load road spectrum data at the loading position cannot be directly measured

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