Fatigue endurance test device and method for a 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, and in particular to a fatigue durability testing device and method for a multi-link rear suspension axle housing assembly. Background technique [0002] The role of the automobile drive axle housing is to support and protect the final drive, differential, and half shaft. The axle housing ensures that the relative position of the wheels in the axial direction is fixed, and bears the forces and bending moments transmitted by the tires during the driving process. [0003] In the process of fatigue durability simulation and iterative model building, the fatigue durability, roll stiffness, strength and other index parameters of the axle housing assembly are required. The existing fatigue durability test device of the axle housing assembly simulates the working state of the road test axle housing assembly by applying load (sine wave) road spectrum data on the axle housing ass...

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

Images