Abstract
Aiming at the problem of pitting on the tooth surface during the development of a hybrid transmission for a passenger car, this paper analyzes and studies the failure causes of pitting on the tooth surface through the theoretical analysis of gear strength, gear misalignment analysis, and tooth surface contact stress analysis. Then, based on the parametric analysis method, the gear micro-modification parameters are further optimized, and the new micro-modification parameters can satisfy the balance between gear durability and NVH performance. Finally, the gear micro-modification parameters design was verified through the endurance bench test and NVH bench test. The gear tooth surface pitting analysis method and gear micro-modification design method described in this article provide a guidance for gear design.
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