山东航空学院学报

新能源汽车减速器的中间轴与传动齿轮的配合方式十分重要。针对目前市场上新能源汽车减速器轴齿采用花键配合方式制造成本高昂、加工工艺复杂等问题，提出了以过盈配合、过盈+辅助键和过盈+花键组合方式代替花键配合的解决方式，并通过创建模型使用有限元分析法进行仿真验证。研究结果表明，该款电动汽车减速器在现有要求下，中间轴与传动齿轮采用过盈+辅助键和过盈+花键组合方式能满足传递扭矩要求，采用过盈配合方式在本设计中不适宜传递全部扭矩，但通过优化设计参数，如改变配合公差或延长接触长度，能够可靠地传递驱动电机的峰值扭矩。

As one of the key automotive components,the coupling method between the intermediate shaft and the transmission gear in new energy vehicle reduction gears is particularly important.In response to issues such as high manufacturing costs and complex processing techniques associated with spline fits currently used in shaft-gear connections in new energy vehicle reduction gears,alternative methods such as interference fit,interference fit with auxiliary keys and interference fit combined with splines have been proposed.Models were developed and validated using finite element analysis for simulation.The results indicate that,under existing requirements,the intermediate shaft and transmission gear in this electric vehicle reduction gear can meet torque transmission demands when using either interference fit with auxiliary keys or interference fit combined with splines.However,aplain interference fit is not suitable for transmitting the full torque in this design.Nevertheless,by optimizing design parameters,such as increasing the interference amount or extending the contact length,it can reliably transmit the peak torque of the drive motor.