自行车无级变速器设计
摘 要
无极变速器是一种能适应工艺工艺要求多变、工艺流程机械化和自动化发展以及改善机械工作性能的一种通用传动装置。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。而无级变速器是一种独立的传动部件,它具有输入和输出两根轴,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。当输入、输出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,将刚性定轴无级变速器和传统的链式无极变速器进行对比,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。同时进行对部分零件进行校、润滑、调整和使用方法的研究,并以此作为本次无级变速设计的理论基础。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 机械无级变速器 调速
The design of the CVT on bicycle
Abstract
Automatic transmission is a kind of adaptive process technological requirements and changeful, process mechanization and automation development and improve the mechanical performance of a universal transmission device.Stepless transmission drive is to point to in under the action of some kind of control, the machine of the output shaft speed can be continuous variation within two extreme way of transmission.And stepless transmission is a kind of independent driving part, it has two input and output shaft, and can be delivered through the middle of the torque medium (solid, liquid, electromagnetic flow) to connect two shaft directly or indirectly, to transfer power.When the input and output shaft were related to control, can make the change the ratio between the two axis (within the scope of the two extreme consecutive and arbitrarily change).Based on the analysis of various kinds of stepless transmission and infinitely variable speed bike, on the basis of the rigid fixed axis stepless transmission were compared with the traditional chain automatic transmission, the steel ball outside cone type stepless transmission partial modification, thus formed the bicycle stepless speed change device.The device through the eight ball using friction power input and output, with a pair of helical gear indexing speed, so that the bicycle for stepless speed regulation between 0.75 ~ 1.22.Simultaneously to school parts, lubrication, adjustment and using method of research, and as the theoretical basis for the design of stepless variable speed.Showed that the stepless transmission is used for bike can greatly improve the performance of bicycle, convenient for consumers to use.
Keyword: CVT bike Mechanical CVT Speed control.
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