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一、前言轮式起重机的动臂、变幅油缸、转台所组成的变幅机构三铰点不仅影响动臂与转台的结构形式和变幅油缸的参数,而且也影响起重机底盘轮轴负荷和其行驶性能。因此,变幅机构三铰点的设计水平直接影响整机性能。变幅机构三铰点(简称三铰点)的设计方法过去一直采用作图试凑法。它不仅有很大的局限性,而且其精度取决于图面工作的精度。文献[1]介绍了用解析作图法设计三铰点,它既要解析计算,又要作图试凑,影响了设计
I. INTRODUCTION The three joints of the luffing mechanism consisting of the boom, variable cylinder, and turntable of the wheeled crane not only affect the structure of the boom and turntable and the parameters of the variable cylinder, but also affect the axle load and the travel of the crane chassis. performance. Therefore, the design level of the three hinges of the luffing mechanism directly affects the overall machine performance. The design method of the three-joint (referred to as the three-joint) of the luffing mechanism has been used in the past. Not only does it have a lot of limitations, but its accuracy depends on the accuracy of the drawing work. The literature [1] introduced the design of three hinges using analytic graphing, which requires both analytical calculations and sample mapping to affect the design.