循环球式转向器的设计论文.pdf

目录 1 绪论1 1.1 课题背景1 1.2 国内外研究现状3 1.3 研究目的及意义3 1.4 研究内容和设计方法3 2 转向器的设计4 2.1 转向系统简介4 2.2 机械转向系5 2.2.1 转向操纵机构6 2.2.2 转向器6 2.2.3 转向传动机构8 2.3 转向系主要性能参数8 2.3.1 转向器的效率8 2.3.2 传动比的变化特性10 2.4 主要尺寸参数的选择12 2.4.1 螺杆、钢球、螺母传动副设计15 2.4.2 齿条、齿扇传动副设计19 2.5 转向器的计算和校核21 2.5.1 循环球式转向器零件的强度计算21 2.5.2 转向摇臂轴直径的确定24 3 结论25 致谢26 摘要 汽车是一种性能要求高，负荷变化大的运输工具。转向系统作为汽车的关键 部件之一，更需要了解和掌握。转向器作为转向系统中最重要的组成部件，对它 进行深入的研究便显得意义重大。循环球式转向器主要由螺杆、螺母、钢球、转 向器壳体等组成，具有较高的传动效率，操纵轻便，磨损较小，使用寿命长，近 年来得到广泛使用。根据现用的国家标准并依据轻型汽车的循环球转向器数据， 按照汽车设计的原则设计一款循环球转向器，完成三维图形和零件平面图的绘制， 使其能够满足现代轿车的国家标准要求。 关键词: 循环球;转向器;设计;分析 Abstract Automobile is a transport machine with high-performance and variable loads. Steering system is one of the key components for vehicles and need to be understood and grasped. As the most important part of steering system, steering gear need to be studied importantly. Circulating ball-type steering gear contains screw, nut, ball, steering gear housing, etc. It has many Advantages, such as high transmission efficiency, light manipulation, less wear and long service life, so as to be widely used in recent years. According to current national standards and the ball steering vehicle data of BJ2020, a cycle ball steering is designed by the automotive principles, and some three-dimensional graphics and rendering parts of the plan are completed, so as to meet the national standards of Modern utility vehicle. Key words: Circulating ball;Steering gear;Design;Analysis I 1 绪论 1.1 课题背景 转向器还被称为转向机、方向机，它