Abstract Given the differing structure of transmissions for pure electric vehicles from the conventional ones, how to enhance the transmission performance is the key to improving their dynamic property and economical efficiency. In this work, a two-speed planetary transmission for a self-designed 10–12 m bus is studied. A simulation model of the transmission is created according to the gear meshing principle, and the load spectra are established by simulating the probable loads on the transmission in actual operation. The gear drive process of the transmission is analyzed, as along with the gear safety factors, damage rates and meshing dislocation. Trimming curves are derived based on the principles of axial and tooth profile modification, the trimming amounts are set, and the contact spots and transmission errors of gear meshing obtained before and after trimming are analyzed comparatively using the MASTA’s gear microscopic trimming module, thereby determining the reasonable method and quantity of trimming for the studied transmission gear. Comparison of the contact spots and transmission errors before versus after trimming finds greatly improved contact condition of gear and more stable gear transmission. With the methodology described in this paper, the shortcomings of traditional gear trimming, such as cumbersome process, long duration and nonlinear gear drive system, can be overcome, which improves the operational reliability.

中文翻译：

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纯电动客车传动齿轮动态接触性能分析及微观修整优化

摘要 纯电动汽车变速器结构与传统变速器不同，如何提高变速器性能是提高其动力性能和经济性的关键。在这项工作中，研究了用于自行设计的 10-12 m 公共汽车的两速行星变速器。根据齿轮啮合原理建立变速器仿真模型，通过模拟变速器在实际运行中可能承受的载荷建立载荷谱。分析了变速器的齿轮传动过程，以及齿轮的安全系数、损坏率和啮合错位。根据轴向和齿形修整原理推导出修整曲线，设定修整量，并利用MASTA的齿轮显微修整模块对修整前后齿轮啮合的接触点和传动误差进行对比分析，从而确定所研究传动齿轮的合理修整方法和数量。比较修整前后的接触点和传动误差，发现齿轮的接触状况大大改善，齿轮传动更加稳定。通过本文所描述的方法，可以克服传统齿轮修整过程繁琐、持续时间长、齿轮传动系统非线性等缺点，提高了运行可靠性。从而确定所研究传动齿轮的合理修整方法和数量。比较修整前后的接触点和传动误差，发现齿轮的接触状况大大改善，齿轮传动更加稳定。通过本文所描述的方法，可以克服传统齿轮修整过程繁琐、持续时间长、齿轮传动系统非线性等缺点，提高了运行可靠性。从而确定所研究传动齿轮的合理修整方法和数量。比较修整前后的接触点和传动误差，发现齿轮的接触状况大大改善，齿轮传动更加稳定。通过本文所描述的方法，可以克服传统齿轮修整过程繁琐、持续时间长、齿轮传动系统非线性等缺点，提高了运行可靠性。