Abstract

Using transmission assemblies and pairs of hypoid bevel gears, fatigue experiments with two different test apparatuses were performed to investigate the bending fatigue life of driving pinion tooth. Experimental results indicated that the average fatigue life of driving pinion tooth tested by a pair of hypoid gears was about 4 times longer than that of the results of transmission assemblies under the same input torque. Simulation results of static stress and static deformation proved that one of the main reasons that affect the bending fatigue life of driving pinion tooth was the mounting stiffness of hypoid gear pair. The assessment standards of bending fatigue life of driving pinion tooth were then changed when the mounting stiffness of the hypoid gear pair was different. One of the effective methods for increasing fatigue life of driving pinion tooth and transmission assembly was to increase the mounting stiffness and to ensure accurate mesh of the hypoid gear pair.

Issue Section:
Research Papers
Keywords:
fatigue life, tooth bending, fatigue testing, hypoid gear, transmission

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