2014机械原理课程设计样本.docVIP

广东工业大学华立学院 课 程 设 计（论文） 课程名称_________机械原理____ __ 题目名称_____步进输送机__________ 学生学部（系）_________________ 专业班级______________________ 学??? 号______________________ 学生姓名______________________ 指导教师______________________ 年 月 日  目 录 一、 步进输料机的主要设计过程································4 二、步进输料机结构简图··········································4 三、设计简述 ·························································4 3.工作原理 ·····················································4 3.传动方案 ·····················································5 3.3设计要求 ····················································6 四6 4.直齿齿轮分析················································6 4.1.1精度分析········································7 4.1.齿轮副的侧隙分析·····························9 4.1.3受力分析········································9 4.1.4载荷分析·······································11 4.1.5齿面接触疲劳强度计算····················12 4.1.6齿根弯曲疲劳强度计算····················13 4.2V带传动分析···············································15 4.2.1 带传动受力分析·····························15 4.2.2 带出动的传动比·····························17 4.3凸轮机构及其设计·······································19 4.3.1 强等加速减速运动规律···················19 4.3.2用解析法设计盘型凸轮轮廓·············21 4.3.3 滚子直动从动件凸轮机构················22 4.4轴的分析及其设计······································24 4.4.1轴的概述······································24 4.4.2提高轴刚度和强度的措施················25 五、自我评价························································28 六、参考书籍························································29 七、附图······························································29 一、步进输料机的主要设计过程 二、 步进输料机结构简图 （见书后附图） 三、 设计简述 §3.1工作原理 当电源接通后，电动机带动带轮1转动，带轮2通过V型带与带轮3相连，（其中带轮3与齿轮4、凸轮5通过轴连接，）带轮3内部的星心轮把电动机的转速ω降到一定的转速ω1,则此时齿轮与凸轮的转速相同，既是ω1。之后，凸轮的转动控制杆机构6，使A杆的收缩和伸长控制工件是否落下（具体情况我们后面会提到杆机构6时的介绍和计算，其中A杆是在伸缩弹簧作用下进行工作的）A伸长阻止下一个工件的落下，同时配合齿轮带动齿形皮带转动把工件送到加工处5加工。齿轮的间歇配合使工件间歇运动。每前进一次后，齿轮4的空隙时间用于工件的加工，达到步进的目的。 §3.2传动方案 此机构的传动方案大体上没什么不同，在杆结构6 的问题上有所不同的意见，我们组进行了紧张的讨论：一种观点是采用从动件圆柱凸轮机构（3-1） 图（3-1）