摘要
为分析杆长变化对滑块位移可靠性的影响，建立了包含杆长尺寸误差和运动副间隙因素下偏置曲柄滑块机构滑块位移可靠性的计算模型。对所建立的滑块位移可靠性计算模型的计算精度进行了仿真验证，结果表明其计算精度可满足工程设计要求。基于MATLAB软件的仿真得出滑块位移可靠性随着曲柄长度减小、连杆长度增加、偏距长度减小而提高。在运动副间隙为连续接触模型时，杆长变化对可靠性的提高比非连续接触模型时更显著。此研究结果对平面机构位移可靠性的提高具有一定的参考价值。
In order to analyze the influence of variable rod length on the displacement reliability of the slider, the displacement reliability calculation model of the eccentric slider- crank mechanism was established, including the dimensional error of the rod and the clearance error of the kinematic pair. The calculation accuracy of the proposed displacement for the slider is validated by simulation and the result showed that the calculation accuracy of the derived formulas is satisfactory to engineering design. Based on the simulation of MATLAB software, the conclusion is that the reliability of the slider increases with the decrease of the crank length, the increase of the connecting rod length, and the decrease of the offset length. And the influence of variable rod length on the reliability under the clearance error of the kinematic pair in the continuous contact model is more significant than the non-continuous contact model. The result of this study has certain reference value on the improvement of the plane mechanism of displacement reliability.
出处
《机械设计与研究》
CSCD
北大核心
2018年第1期82-86,共5页
Machine Design And Research
关键词
曲柄滑块机构
位移可靠性
杆长变化
尺寸误差
运动副间隙
slider-crank mechanism
displacement reliability
variable rod length
dimensional error
pair clearance
