To improve the dynamic performance of spiral bevel gear transmission, an ease-off flank modification method of the high-contact-ratio spiral bevel gear is proposed. First, the high-contact-ratio spiral bevel gear is designed by increasing the angle between the contact path and the pitch cone of a pinion tooth surface with ease-off technology. Second, the meshing performance of the high-contact-ratio spiral bevel gear designed utilizing ease-off technology is compared with the HCR spiral bevel gear designed by the local synthesis method. Finally, the loaded transmission error (the main vibration excitation of the gear transmission in the low-speed range), the meshing impact (the main vibration excitation of the gear transmission in the high-speed range) and the dynamic performance of the high-contact-ratio spiral bevel gear are compared with that of a low-contact-ratio spiral bevel gear. A simulation analysis based on the ease-off technology shows that the design contact ratio of the spiral bevel gear can be improved by increasing the angle between the contact path and the pitch cone of the pinion tooth surface; compared with the local synthesis method, the high-contact-ratio spiral bevel gear transmission designed by the ease-off flank modification method has a better meshing performance; increasing the design contact ratio can effectively reduce the loaded transmission error, and meshing impact, and obtain a spiral bevel gear transmission with good dynamic performance over the whole speed range.

为提高螺旋锥齿轮传动的动态性能，提出了一种高接触比螺旋锥齿轮的易脱齿面修形方法。首先，高接触比螺旋锥齿轮是通过使用缓离技术增加接触路径和小齿轮齿面的节锥之间的角度来设计的。其次，将利用缓动技术设计的高接触比螺旋锥齿轮与局部合成法设计的HCR螺旋锥齿轮的啮合性能进行了比较。最后是加载传动误差（齿轮传动在低速范围内的主要振动激励），将高接触比螺旋锥齿轮与低接触比螺旋锥齿轮的啮合冲击（齿轮传动在高速范围内的主要振动激发）和动态性能进行比较。基于ease-off技术的仿真分析表明，通过增大接触路径与小齿轮齿面节锥之间的夹角，可以提高螺旋锥齿轮的设计接触比；与局部合成法相比，采用缓离齿面修形法设计的高接触比螺旋锥齿轮传动具有更好的啮合性能；增大设计接触比，可有效降低负载传动误差和啮合冲击，获得全速度范围内动态性能良好的螺旋锥齿轮传动。