平面曲柄摇杆机构自调结构的分析与设计  

ANALYSIS AND DESIGN OF SELFADJUSTABLE STRUCTURES FOR THE PLANE CRABJ-RICJER MECHANISM

作　　者：安培文[1] 黄茂林[1] 

机构地区：[1]重庆大学机械工程学院,重庆400044

出　　处：《机械工程学报》2004年第5期11-16,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50075087)

摘　　要：对高效、高稳定性及低成本的无过约束自调机构的研究是基于约束不确定的稳健设计的最重要方面。详细分析了无过约束机构能够实现自调的机理;提出无过约束平面曲柄摇杆机构自调性分析的方法,得到机构能够实现自调的允许误差角;得出一些可以指导自调机构结构设计以及运动副形位公差确定等方面的结论和原则。从而为科学地、而不是经验地设计自调机构提供了理论依据。Study of self-adjustable mechanisms without over- constraint, which are high efficiency and stability and low cost, is the most important aspect of robust design based on the un- certainty of planar constraints. Mechanism of self-adjustment is analyzed for planar crank-rocker mechanism withou overcon- straint, and self-adjustment conditions of the crank-rocker mechanism are derived from the condition of self-locking in prismatic pair. With this understanding, a method, which can be used to analyze performance of self-adjustment for the crank-rocker mechanism, is proposed and allowable error an- gles that the mechanism can self-adjust are found. Some con- clusions and rules, which can be applied to synthesizing for the self-adjustable mechanisms and determining for shape-position tolerances of kinematic-pair elements and axes, are obtained. Thereby, the theoretic foundation is provided for designing self-adjustable machines scientifically,and not experientially.

关 键 词：过约束 曲柄摇杆机构 自调 自调结构 允差 

分 类 号：TH112[机械工程—机械设计及理论]