机械5

星轮行星轮可爬楼梯式轮椅车设计 摘要 随着社会的发展，先进的科技给人们的生活带来了很多方便，但也给残疾人带来了好多麻烦，诸如汽车越来越多，就会造成更多的车祸，会使残疾人越来越多。楼层越来越高，带台阶的地方也越来越多。这就给残疾人的出行带来了好多不便。 在日常生活中，我们会很容易地发现那些下肢部分有残疾的人在生活中常常会碰到很多麻烦。随着社会的发展和人民生活水平的提高，残疾人的生活上的问题和面临的困难也越来越引起人们的重视。 为了解决这一麻烦，我通过查找资料和研究设计了一种轮椅车。它通过星轮行星轮之间的运行转换而实现爬楼梯和平地运行。当齿式离合器放松时，链轮带动星轮转动，他在平地行走，等齿式离合器把箱体锁紧时，整个齿轮系成为整个刚体，它通过翻转可以爬上楼梯结构简单，经济实惠，安全可靠，可以适应大部分的地形，可以解决大部分残疾人的出行问题。第一章通过市场的调研，看一看产品的市场前景。第二章是通过研究履带式轮椅、步进式轮椅、翻转式轮椅而确定设计方案为星轮行星轮式。第三章是设计原理，第四章设计的计算，受力的分析，可靠性的计算等。第五章是结构的设计，先是齿轮传动设计，再是链轮传动设计，最后是轴的设计，车架的设计。最后是总结，致谢和参考文献。 关键字：星轮行星轮；齿式离合器；传动 abstract With the developme
nt of society, the adva
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n 目录 引言5 1绪论6 1.1课题背景6 1.1.1市场背景分析6 1.1.2需求预测6 1.3课题的研究目的及意义6 2方案设计7 2.1设计要求7 2.2方案的提出7 2.3方案比较11 3工作原理12 3.1星轮行星轮转换式结构基本原理12 3.2导向轮基本原理12 3.3双驱动点两级链传动系统基本原理13 4设计方案14 4.1楼梯台阶的尺寸确定14 4.2能够爬楼不打滑的条件计算15 4.3驱动力的计算16 5机构的设计17 5.1总体结构的尺寸分析和确定17 5.1.1总体结构的尺寸分析17 5.1.2总体结构的确定19 5.2齿轮部分的研究和设计21 5.2.1齿轮的介绍21 5.2.2渐开线直齿圆柱齿轮的啮合传动25 5.2.3齿轮的设计计算29 5.2.4齿轮传动30 5.3链传动的研究和设计31 5.3.1链传动的特点和应用31 5.3.2传动链的结构特点32 5.3.3滚子链链轮的结构和材料33 5.3.4链传动的运动特性33 5.3.5链传动的受力分析36 5.3.6滚子链传动的设计计算36 5.3.7链传动的布置、张紧和润滑39 5.3.8链的尺寸计算40 5.4轴的研究和设计40 5.4.1轴得扭转强度计算40 5.4.2轴得弯曲合成强度计算41 5.4.3轴的材料及选择42 5.4.4轴的设计42 5.5键联接45 5.6底架材料的选用和结构的设计46 5.7靠背的设计与制造48 5.8其他结构的设计48 5.8.1齿式离合器48 5.8.2轴承49 5.8.3其他50 5.9总装配图50 总结52 参考文献54