A wide range of non circular gear, including the internal and external meshing of the straight teeth, helical gears, elliptical gears, modified elliptical gears, as well as multi ring gear and other non closed circular gear。 The eccentric gear is refers to a pair of ordinary involute spur gear, but does not coincide with the center of gyration and the geometric center, forming an eccentric distance, in order to achieve variable-speed transmission ratio, with manufacturing and that of the common involute gear amounts, can be in a certain range instead of making complex of the non circular gear of attractive features。
In this paper, the basic theory of eccentric involute gear is discussed in this paper。 Then analysis of eccentric involutes gears of the transmission function, and then use the MATLAB programming language is calculated with different eccentricity e and base circle radius r of the transmission ratio, according to the calculated results and the curve of change。 Analysis of transmission ratio variation, this paper mainly adopts the fourth Runge grid library take on in the process of solving。
Key Words: non circular gear eccentric involute gear order four Dragon grid library building law;
目录
摘要 I
Abstract II
目录 IV
1绪论 1
1。1课题研究的背景和意义 1
1。2偏心渐开线齿轮的发展概况 1
1。3偏心渐开线齿轮的特点 4
1。4偏心渐开线齿轮的应用 4
2偏心渐开线齿轮的传动函数的研究 7
2。1偏心渐开线齿轮的传动函数研究 7
2。2龙格库塔法 10
2。3本章小结 14
3偏心渐开线齿轮的传动误差分析 15
3。1基于齿轮传动误差的Excel数值计算 15
3。2两齿轮偏心距不同时对传动误差的影响 15
3。3两齿轮中心距不同时对传动误差的影响 22
4总结与展望 25
4。1总结 25
4。2进一步设想及展望 26
参考文献 27
致谢 30
1绪论
偏心渐开线齿轮(Eccentric involute gear)是指齿轮机构在传动时,传动比是变化的,与目前定传动比的圆形齿轮不同。当只有圆形齿轮的情况下,很难完成一些需要传动比变化的工作,特别是在一些自动机械较高的机构中。偏心渐开线齿轮在运动学,以及几何方面有着不同于其他齿轮的优点,使得主动轮与从动轮之间的关系变为非线性,就是我们所说的变传动比传动。除此之外,凸轮、连杆等机构也可以达到这种非线性的目的,这两种机构相对于偏心渐开线齿轮来说,偏心齿轮有着结构稳定、精度准确、运行平稳等特点。
图1。1
1。1课题研究的背景和意义
偏心渐开线齿轮传动技术始终是世界上机械专家们炙手可热的话题,因为种种原因使得偏心齿轮始终未能得到普及,具体的原因例如非圆齿轮的设计比较复杂,在生产中,依旧是齿轮泵、高速插秧机、高速包装机等占据主流。但是,随着科技的进步,计算机的发展,CAD/CAM等技术以及数控的发展,偏心渐开线齿轮的制造和设计越来越容易,偏心渐开线齿轮将在生产中发挥的作用日趋重要,必定会得到普遍的应用。