设计简介
摘 要
无级变速器传动是指在某种控制的作用下，使机器的输出轴转速可在两个极值范围内连续变化的传动方式。而无级变速器是这样的一种装置，它具有主动和从动两根轴，并能通过传递转矩的中间介质（固体、流体、电磁流）把两根轴直接或间接地联系起来，以传递动力。当对主、从动轴的联系关系进行控制时，即可使两轴间的传动比发生变化（在两极值范围内连续而任意地变化）。本文在分析各种无级变速器和无级变速自行车的基础上，把钢球外锥式无级变速器进行部分改装，从而形成了自行车的无级变速装置。该装置通过八个钢球利用摩擦力将动力进行输入输出，用一对斜齿轮进行分度调速，从而使自行车在0.75～1.22之间进行无级调速。研究表明：无级变速器被用于自行车方面可以大大改善自行车的使用性能，方便广大消费者使用。
关键字: 无级变速自行车 无级变速器 调速
Abstract
Have no the class gearbox spread to mean under the function that is a certain to control, make the exportation stalk of machine turn soon can at two pole is worth the continuous variety in the scope of spread a way.But have no class gearbox is such a kind of device, it has active with from move two stalks, and can pass to deliver the middle of turning the Ju to lie quality(the solid, fluid and electromagnetism flows) to contact two stalks directly or indirectly to deliver power.When to lord, from move an axial contact relation to carry on a control, can immediately make spreading of 2 compare occurrence variety.(be worth to change in a row but at will inside the scope in two poles).Based on the analysis of various CVT and CVT bikes,in this dissertation ,we change some parts of the Kopp-B CVT forming a new kind of CVT used to the bicycle .They are used to input or output the power through the friction and a pair of helical gears is also used to adjust the speed, so the speed can change between 0.75 and 1.22.This research shows that when the CVT are used in the bicycle ,they can significant improve the performance of bike so that all customers can use it convenient.
Keyword: CVT bike CVT Speed control.
目录
1 绪 论 3
1.1 机械无级变速器的概述及应用 3
1.2 无级变速器的分类 3
1.3 机械无级变速器的发展 4
1.4 无级变速自行车研究现状 6
1.5 毕业论文设计内容和要求 7
2 钢球行星式无级变速器的总体方案选择 9
2.1 采用螺旋传动实现球架的左右移动 9
2.2 依靠左右推动实现球架的移动 10
2.3 两方案的选择与比较 10
3 钢球行星式无级变速器部分零件的设计计算 11
3.1 钢球的设计计算 11
3.2 钢球支轴转角的设计计算 12
3.3 轴槽的长度及卡盘的倾斜角的设计计算 13
3.4 轴的设计计算 14
3.4.1 轴的选材及最小直径的计算 14
3.4.2 轴的结构设计 15
3.4.3 轴的校核 16
3.5 滚动轴承的选择 18
3.6 自行车无级变速器的安装 19
4 钢球行星式无级变速器的变速原理论证 20
4.1 关于本文的无级变速器 20
4.2 无级变速的运动结构分析 20
4.2.1无级变速的运动 20
4.2.2 变速原理分析 22
5 结论 23
参考文献 24
致谢 25
无级变速器传动是指在某种控制的作用下，使机器的输出轴转速可在两个极值范围内连续变化的传动方式。而无级变速器是这样的一种装置，它具有主动和从动两根轴，并能通过传递转矩的中间介质（固体、流体、电磁流）把两根轴直接或间接地联系起来，以传递动力。当对主、从动轴的联系关系进行控制时，即可使两轴间的传动比发生变化（在两极值范围内连续而任意地变化）。本文在分析各种无级变速器和无级变速自行车的基础上，把钢球外锥式无级变速器进行部分改装，从而形成了自行车的无级变速装置。该装置通过八个钢球利用摩擦力将动力进行输入输出，用一对斜齿轮进行分度调速，从而使自行车在0.75～1.22之间进行无级调速。研究表明：无级变速器被用于自行车方面可以大大改善自行车的使用性能，方便广大消费者使用。
关键字: 无级变速自行车 无级变速器 调速
Abstract
Have no the class gearbox spread to mean under the function that is a certain to control, make the exportation stalk of machine turn soon can at two pole is worth the continuous variety in the scope of spread a way.But have no class gearbox is such a kind of device, it has active with from move two stalks, and can pass to deliver the middle of turning the Ju to lie quality(the solid, fluid and electromagnetism flows) to contact two stalks directly or indirectly to deliver power.When to lord, from move an axial contact relation to carry on a control, can immediately make spreading of 2 compare occurrence variety.(be worth to change in a row but at will inside the scope in two poles).Based on the analysis of various CVT and CVT bikes,in this dissertation ,we change some parts of the Kopp-B CVT forming a new kind of CVT used to the bicycle .They are used to input or output the power through the friction and a pair of helical gears is also used to adjust the speed, so the speed can change between 0.75 and 1.22.This research shows that when the CVT are used in the bicycle ,they can significant improve the performance of bike so that all customers can use it convenient.
Keyword: CVT bike CVT Speed control.
目录
1 绪 论 3
1.1 机械无级变速器的概述及应用 3
1.2 无级变速器的分类 3
1.3 机械无级变速器的发展 4
1.4 无级变速自行车研究现状 6
1.5 毕业论文设计内容和要求 7
2 钢球行星式无级变速器的总体方案选择 9
2.1 采用螺旋传动实现球架的左右移动 9
2.2 依靠左右推动实现球架的移动 10
2.3 两方案的选择与比较 10
3 钢球行星式无级变速器部分零件的设计计算 11
3.1 钢球的设计计算 11
3.2 钢球支轴转角的设计计算 12
3.3 轴槽的长度及卡盘的倾斜角的设计计算 13
3.4 轴的设计计算 14
3.4.1 轴的选材及最小直径的计算 14
3.4.2 轴的结构设计 15
3.4.3 轴的校核 16
3.5 滚动轴承的选择 18
3.6 自行车无级变速器的安装 19
4 钢球行星式无级变速器的变速原理论证 20
4.1 关于本文的无级变速器 20
4.2 无级变速的运动结构分析 20
4.2.1无级变速的运动 20
4.2.2 变速原理分析 22
5 结论 23
参考文献 24
致谢 25
