摘要
推导了球铰临界角理论公式,并以平面四连杆机构作为应用实例分析研究了机构输出误差规律,结果表明连杆弹性变形和球铰间隙是连杆长度误差的主要因素;连杆最大摆角误差与球铰间隙、连杆压力载荷和球铰摩擦系数正相关。在此基础上提出了一种应用聚四氟乙烯复合材料作为球铰涂层的设计方案并制造了涂层球铰,球铰摩擦转矩测量实验证明了球铰涂层的减摩作用。
The theoretical expression of critical angle for sliding spherical joint was deduced.A four-bar mechanism was chosen as a study case.The results revealed that linkage elastic deformation and spherical gap were the key factors to determine the length error of linkage.The angle error of linkage was found positive correlation to joint gap,external load and friction coefficient.This thesis modified spherical joint by applying polytetrafluoroethylene (PTFE)on the surface of spherical joint.The torque test verified the antifriction effect of coating spherical joint.
作者
刘良宝
吴振强
张洁
刘宝瑞
王丹
LIU Liang-bao;WU Zhen-qiang;ZHANG Jie(School of Mechanical Engineering and Automation,Beihang University,Beijing 100191;Science and Technology on Reliability and Environment Engineering Laboratory,Beijing Institute of Structure and Environment Engineering,Beijing 100076)
出处
《航空精密制造技术》
2018年第6期28-31,36,共5页
Aviation Precision Manufacturing Technology
基金
航天一院高校联合创新基金(CALT201608)
关键词
滑动球铰
临界角
精度
平面连杆机构
复合材料涂层
sliding spherical joint
critical angle
precision
planar linkage mechanism
polytetrafluoroethylene coating
