机械原理课程设计样本.doc

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1、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______________________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·················

2、·························4三、设计简述·························································43.工作原理·····················································43.传动方案·····················································53.3设计要求····················································6

3、四、部分结构解析·················································64.直齿齿轮分析················································64.1.1精度分析········································74.1.齿轮副的侧隙分析·····························94.1.3受力分析········································94.1.4载荷分析····

4、···································114.1.5齿面接触疲劳强度计算····················124.1.6齿根弯曲疲劳强度计算····················134.2V带传动分析···············································154.2.1带传动受力分析·····························154.2.2带出动的传动比·····························174.3凸轮机构及其设计····

5、···································194.3.1强等加速减速运动规律···················194.3.2用解析法设计盘型凸轮轮廓·············214.3.3滚子直动从动件凸轮机构················224.4轴的分析及其设计······································244.4.1轴的概述······································244.4.2提高轴刚度和强度的措施···············

6、·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

7、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），落下一个工件后杆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

8、杆结构6的问题上有所不同的意见，我们组进行了紧的讨论：一种观点是采用从动件圆柱凸轮机构（图3-1），图（3-1）第二种方案是采用齿轮与齿条的配合（图3-2）。（图3-2）而另一种观点是采用从动件盘形凸轮与摇杆机构的组合图