电动车尾门电动推杆用低音调齿轮的开发与验证

Validation of Noise Reduction Using Low-Tone Gearing on a Push-Rod System

摘要:

高速电动机目前被广泛用于汽车自主驾驶系统。由于高速电动机采用小质量设计，因此为了使转速和输出扭矩达到目标值，通常将渐开线齿轮组和它配套使用。然而，传统的渐开线齿轮在工作中噪声较大，因此一种新型的具有不规则轮齿设计的低音调（Low-Tone）齿轮被开发，以减少齿轮传动装置的噪声。通过优化算法，开发设计了一种Low-Tone齿轮，并应用于一个驱动电动车尾门启闭的电动推杆系统。之后在该系统运行期间，对使用Low-Tone齿轮和使用传统齿轮所产生的声压进行测量对比。结果表明，Low-Tone齿轮对于噪声有较好的抑制作用，其优势特别体现在音调特性方面。

Abstract:

Electric motors with very high speeds are used widely for highly automated and autonomous driving. A low weight design of high-speed electric motors can reduce the demand for environmentally harmful materials. However， due to the regular involute gears， which are usually used with high-speed motors to bring the rotation speed and output torque into target values， a noticeable and extremely annoying tonal noise occurs， which compromises the comfort of passengers significantly. Thus， an innovative low-tone gearing with irregular design of tooth is introduced to reduce the noise of gear transmissions. To obtain a low-tone gearing design for an electric push-rod system， which operates the tailgate of vehicles to either open or close， an optimization is conducted. Then for comparison， the sound pressure of the low-tone gearings and a regular design is measured during the operation of the push-rod system. Finally， the reduction of noise by using the low-tone gearing， especially from the aspect of the tonality， is validated by analyzing the measured data.