自行車無級變速器設計
摘 要
無極變速器是一種能適應工藝工藝要求多變、工藝流程機械化和自動化發展以及改善機械工作性能的一種通用傳動裝置。無級變速器傳動是指在某種控制的作用下，使機器的輸出軸轉速可在兩個極值范圍內連續變化的傳動方式。而無級變速器是一種獨立的傳動部件，它具有輸入和輸出兩根軸，并能通過傳遞轉矩的中間介質（固體、流體、電磁流）把兩根軸直接或間接地聯系起來，以傳遞動力。當輸入、輸出軸的聯系關系進行控制時，即可使兩軸間的傳動比發生變化（在兩極值范圍內連續而任意地變化）。本文在分析各種無級變速器和無級變速自行車的基礎上，將剛性定軸無級變速器和傳統的鏈式無極變速器進行對比，把鋼球外錐式無級變速器進行部分改裝，從而形成了自行車的無級變速裝置。該裝置通過八個鋼球利用摩擦力將動力進行輸入輸出，用一對斜齒輪進行分度調速，從而使自行車在0.75～1.22之間進行無級調速。同時進行對部分零件進行校、潤滑、調整和使用方法的研究，并以此作為本次無級變速設計的理論基礎。表明：無級變速器被用于自行車方面可以大大改善自行車的使用性能，方便廣大消費者使用。
關鍵字: 無級變速自行車 機械無級變速器 調速
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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