目的　探讨转管机枪机心组开闭锁系统的分析设计 ,并保证其布置合理 ,结构简单 ,动作可靠 .方法　在优化机心匣凸轮曲线的基础上 ,通过合理分析机心在开闭锁运动时的回转角 ,确定开锁臂和闭锁臂位置及长度来设计开闭锁系统 .结果　设计出了能满足要求的机心组开闭锁系统 .结论　该方法可用来指导转管武器的机心组开闭锁系统设计 Objective To discuss the design and analysis of the open / close system of the machine gun heartbeat of the tube-removing machine and to ensure its layout is reasonable, the structure is simple and the operation is reliable.Methods Based on optimizing the cam curve of the machine- The angle of rotation and the position and length of the unlocking arm and the locking arm were determined to design the locking and unlocking system.Results The machine locking and unlocking system was designed to meet the requirements.Conclusion This method can be used to guide the design of the opening and closing lock system