平地机前桥及中松附具的设计与分析

Design and Analysis of the Front Axle and the Central Loose Attachments of the Grader

为优化平地机前桥及中松附具复合运动空间结构设计,首先要完成前桥及中松附具方案参数化建模,通过对模型施加符合运动方式的运动副和驱动命令,可以实现运动学仿真,获取内、外侧车轮转向角度关系、前桥复合运动时转向油缸参数变化关系,为前桥油缸参数确定提供基础,同时,创建前桥轮胎、中松附具等关键部件的包络体,并进行动态间隙分析和机构空间结构的验证。结果表明:该方法有利于前桥及中松附具复合运动的结构设计。

In order to optimize the design of the compound moving space structure for the front axle and the central loose attachment of the grader,parametric modeling of the scheme of the front bridge and the central loose attachment should be completed f irst.The kinematic simulation can be realized by applying the motion pairs and driving commands to the model,and the steering angle relationship of inner and outer wheels and the change relationship of steering cylinder parameters during the compound motion of front axle were obtained,which provided the basis for the determination of front axle cylinder parameters.At the same time,the enveloping solid of key components such as front axle tires and central loose attachments are created,and dynamic clearance analysis and mechanism spatial structure verification are carried out.The results show that this method is beneficial to the structural design of compound motion of front axle and central loose attachments.