Locking mechanism of aviation aircraft is very important for perform mission.But its study is centralized on experiment field.In order to avoid motion interference of locking mechanism efficiency and design it reasonably,the method of parametric modeling and kinematics simulation was put forward in the paper.The optimum model of dimension calculation was established based on strength analysis of locking mechanism.Its dimension parameter was design.Its solid model was realized based on parametric method.The kinematics simulation model of locking mechanism was established.And its motion state was simulated.The results show that designed locking mechanism has good motion continuity and has no motion interference.It can realize close and open effectively.In the working process of locking mechanism,lock hook is close to lock bar with steady speed before 32 second.They piece on speedily and realize lock tightly after 32 second.Acceleration of lock hook increases quickly and produces larger speed and force in the instancy of lock tighten.This agrees satisfactorily with actual situation.Above results show that the model can simulate the actual motion state of aviation aircraft locking mechanism effectively and offer some theoretical basis for design and use of locking mechanism.%研究锁机构优化设计,对航空飞行器任务完成起着至关重要的作用.由于以往研究多集中在实验仿制方面,开展仿真理论研究的较少,针对上述问题提,出了一种能有效避免锁机构运动干涉,合理设计锁机构的参数化建模和运动学仿真模型.利用锁机构强度分析的尺寸优化方法,设计了锁机构厚度、宽度以及销轴与杆件的接触长度等尺寸参数,实现了锁机构的参数化实体建模,建立了锁机构的运动学仿真模型,进行运动状态仿真.结果表明,设计的锁机构运动连续性好,无运动干涉现象,能实现有效闭合、开启.锁钩工作行程中,第32s前,“稳转速”接近锁闩,32s后快速扣合,实现锁紧；在锁紧瞬间,加速度急速增大,产生较大速度和力,符合实际情况.说明该模型能很好地用于航空飞行器锁机构的结构设计,有效模拟锁机构实际运动状态,为其正常设计应用提供理论依据.
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