中置电动助力自行车减速器的振动特性研究
Research on the Vibration Characteristics of the Speed Reducer of Mid-Mounted Electric-Assisted Bicycle

为改善中置电动助力自行车动力学性能，提高车辆骑行舒适度和续航能力，本文采用渐开线少齿差行星齿轮减速器作为中置电动助力自行车的驱动部分，并对减速器进行一系列的研究。通过ANSYS Workbench有限元模态分析得到了减速器的固有振型和固有频率，有效排除齿轮传动过程中发生共振的可能性。通过对减速器振动特性的仿真，研究了减速器的振动加速度，分别使用蓄电池和直流电源作为驱动源进行实验，实验结果与仿真结果吻合。振动特性研究结果表明输入转速对减速器的振幅与频率有明显的影响，并且相较于直流电源，使用蓄电池作为驱动源对振动有一定的减缓作用。
In order to improve the dynamic performance of the mid-mounted electric-assisted bicycle, and improve the riding comfort and endurance of the vehicle, in this paper, an involute planetary gear reducer with small tooth difference is used as the driving part of a mid-mounted electric-assisted bicycle, and a series of researches on the reducer is carried out. Through finite element modal analysis, the natural frequency and natural vibration mode of the reducer are obtained, which effectively eliminates the possibility of resonance during gear transmission. Through the simulation of the vibration characteristics of the reducer, the vibration acceleration of the reducer is studied, and the battery and the DC power supply are used as the driving source for experiments. The experimental results are consistent with the simulation results. The research results of vibration characteristics show that the input speed has a significant effect on the amplitude and frequency of the reducer, and compared with the DC power supply, the use of a battery as a driving source has a certain mitigation effect on vibration.