摘要
为扩大传统平面连杆机构的应用范围、丰富其结构形式,通过完全采用以偏心构件代替连杆,以转动副代替铰接,构成一种新型的四偏心式平面四连杆机构,即带有大转动副的微型平面四连杆机构。为促进此机构向实用阶段转化,给出了两种基本的结构形式,并对其进行了初步的结构分析、运动分析、CAE仿真以及实验验证。给出了各构件的基本尺寸关系和结构优化的方法,求出了从动构件的转角位移运动方程和曲线。通过仿真获得了与理论推导结果相同的从动构件的转角位移运动曲线;同时得出了此机构与传统平面四连杆机构的运动仿真轨迹曲线一致。指出了此机构相对于传统四连杆机构的特点和实施要点。上述分析证明此机构与传统平面四连杆机构的运动规律在本质上具有一致性。
To enlarge the application range of traditional Planar four-bar mechanism and enrich the structure form, replace the four bars with eccentricity components and replace hinge connections with revolute joints completely to form a new kind of four-bar mechanism with all elements being eccentricity components, i.e, it is a small planar four-bar mechanism with large revolute joint. To promote the course of practical application, two kind of structure are introduced; the primary analysis of structure and motion, and CAE simulation and experiment verification are conducted. The basic dimension relationships among components and a structure optimizing method are recommended, and the driven member＇s angular displacement function and curve yield, and that the two mechanisms share the same trajectory are proved by motion simulation, then the key points for implementing are put forward. Through above analysis, it is proved that the two mechanisms posses the identical nature characteristics of motion.
出处
《机械》
2008年第11期11-13,共3页
Machinery
关键词
四连杆机构
偏心构件
铰接
转动副
four-bar mechanism
eccentric component
hinge
revolute joint
