半转机构的简约化设计研究

发布时间：2018-05-01 01:37

本文选题：仿生机械 + 半转机构　；参考：《机械设计》2017年10期

【摘要】：半转机构是一种用于动物运动仿生的新机构,对其进行简约化设计是提高仿生机械性能的需要。文中在半转机构不动点运动特征基础上,提出从结构简单的曲柄摇块机构到半转机构的演绎设计方法。指出当曲柄摇块机构的摇块处于与动轴重合的特殊位置时,导杆的回程摆动消失而演变为半转杆。对于在此特殊位置可能出现的运动干涉,给出了带槽动轴及摇块对置两种破解方案。对于破解干涉后出现的机构奇异性问题,提出了带槽动轴与转动滑块组合及止转片与止转槽组合两种局部约束方案,保证了新型半转机构的运动稳定性。试验结果表明,文中提出的干涉破解、奇异性消除及局部约束设计等方法具有可行性和正确性,不但实现了结构极简单的半转机构的简约化设计,而且局部约束消除奇异性方法对于机构创新设计具有借鉴意义和参考价值。
[Abstract]:Semi-rotating mechanism is a new kind of bionic mechanism for animal motion. It is necessary to improve the mechanical performance of bionic mechanism by simplified design. Based on the fixed point motion characteristics of the semi-rotating mechanism, a deductive design method from the crank rocker mechanism to the semi-rotating mechanism is presented in this paper. It is pointed out that when the crank of the crank mechanism is in a special position which coincides with the moving shaft, the return swing of the guide rod disappears and evolves into a half rotating rod. For the possible motion interference in this special position, two schemes are given: the shafts with grooves and the shafts facing the shafts. In order to solve the singularity problem of mechanism after interference, two kinds of local constraint schemes, that is, the combination of moving shaft with slot and rotating slider, and the combination of stop plate and stop slot, are put forward to ensure the motion stability of the new semi-rotating mechanism. The experimental results show that the proposed methods, such as interference solution, singularity elimination and local constraint design, are feasible and correct, and not only the simplified design of the semi-rotating mechanism with very simple structure is realized. Moreover, the method of eliminating singularity with local constraints has reference significance and reference value for mechanism innovation design.
【作者单位】：安徽工业大学机械工程学院;
【基金】：国家自然科学基金资助项目(51375014)
【分类号】：TH112;TH122

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