关键词: 机械设计 , 循环定位链 , 传动 , 负变位 , 重合度

Abstract: The structure and principle of reciprocating positioning chain are introduced, and the mesh?ing process is analyzed also. By designing the negative shift for the sprocket, its trajectory coincides with the theoretical one, and the meshing quality is improved. The coincidence degree of the meshing is analyzed, it offers a guideline for choosing the coincidence degree, and it is significant to improve the transmission smoothness.

Key words: machine design , reciprocating positioning chain , transmission , negative shift , coincidence degree