1. The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, China
2. School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao, China
3. Inner Mongolia First Machinery Group Co., Ltd, Baotou, China
4. Jiangsu Tailong Decelerator Machinery Co., Ltd, Taixing, China