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本文就T140－1推土机终传动齿轮的工作特性及存在的问题进行讨论，并与D6D推土机对比分析。从而推导出一套不同于我国现有齿轮设计方祛的重载齿轮、大变位系数（x＞1）齿轮的设计计算方法。
This article discusses the working characteristics and existing problems of T140-1 bulldozer final drive gear, and compares with D6D bulldozer. Thus a set of different design and calculation methods of heavy gear (x> 1) different from those of the existing gear design in our country is deduced.