基于“轨迹坐标”的竞赛小车凸轮设计

Cam Design of Racing Car Based on“Trajectory Coordinates”

以设计实现中国大学生工程实践与创新能力大赛基础赛道运行轨迹小车用凸轮为目的,介绍一种基于“轨迹坐标”的竞赛小车凸轮设计方案.该方案不同于传统设计思路,综合运用Inventor、AutoCAD和UG NX设计工具软件中的简单功能,采用规划优化、分析计算、Excel数据整理、建模和仿真等设计手段,通过利用轨迹坐标映射出凸轮轮廓线的方法,解决有各种避障运行轨迹要求的小车凸轮的复杂设计问题.这种设计凸轮的方法,可以应对赛题的各种轨迹变化,对于其他机构的设计也提供了有益的设计思路和方向.

In order to design and realize the cam for the basic circuit in Chinese University Students’Engineering Practice and Innovation Ability Competition,in this article we introduce a cam design of race car based on the“trajectory coordinates”.Different from the traditional design,our new design has resolved the complex cam design problem of the car with various obstacle avoidance track requirements,by comprehensively using the simple functions in Inventor,AutoCAD and UG NX,adopting such design methods as planning optimization,analysis and calculation,Excel data sorting,modeling and simulation,and applying trajectory coordinates to mapping the convex contour.Therefore,this cam design method can deal with the problem of various trajectory changes and also provides a very beneficial design idea and direction for the design of other mechanisms.