摘要
无级变速器特点是采用传动带和工作直径可变的主、从动轮相配合传递动力。由于无级变速器可以实现传动比的连续改变，从而得到传动系与发动机工况的最佳匹配，提高整车的燃油经济性和动力性，改善驾驶员的操纵方便性和乘员的乘坐舒适性，所以它是理想的汽车传动装置。无级变速系统主要包括主动轮组、从动轮组、金属带（关键所在）和液压泵等基本部件。主动轮组和从动轮组都由可动盘和固定盘组成，与油缸结合的一侧带轮轴向滑动，另一侧则固定。可动盘与固定盘都是锥面结构，它们的锥面形成V型槽与V型金属带啮合。发动机输出轴输出的动力首先传递到无级变速器的主动轮，然后通过V型传动带传递到从动轮，最后经减速器、差速器传递给驱动轮。工作时通过主动轮与从动轮的可动盘作轴向移动来改变主动轮、从动轮锥面与V型传动带啮合的工作半径，从而改变传动比。可动盘的轴向移动量是由驾驶者根据需要通过控制系统调节主动轮、从动轮液压泵油缸压力来实现的。本设计旨在通过对金属带式无极变速器的研究，找到可循的改良方案。
关键词无级变速器；金属带式无极变速器；无级变速器设计
Abstract
Characteristics of continuously variable transmission belts and work with a diameter of variable from the wheel fit transfer of power. Due to the continuous change of continuously variable transmission can implement the ratio in order to get the best match of transmission and engine condition, improving vehicle fuel economy and power, improve the operating convenience of drivers and passengers riding comfort, it is an ideal vehicle transmission device. Continuously variable transmission system which includes round group, from the wheel group, the metal with the key and basic components of hydraulic pump. Active Wheel Group and passive Wheel Group is composed of movable and fixed disk, and combine cylinder side with Axial sliding and the other side is fixed. Movable and fixed cone structure, they cone Form V type slot with V - type metal belt mesh. Engine output shaft of output power first delivered to continuously variable transmission for driving wheels, and then by V - belt transmission wheel, the final reducer and differential pass driving wheels. Work by driving wheels with gear of movable to move to change the driving wheels, from the work of V - belt mesh and gear cone radius, thus changing the ratio. Movable plate under Axial movement, which was driven by needs through the control system of active round, from the wheel Hydraulic Pump cylinder pressure to achieve. This is designed by the study of metal V - belt type non - polar transmission, found through improvement scheme.
Key words ：CVT ；Metal Belt Continuously Variable Transmission；
Continuously Variable Transmission
目录
摘要.................................................................................................................... I Abstract.............................................................................................................. II 第1章绪论 (5)
1.1 汽车无级变速器的类型和特点 (6)
1.1.1 宽V形胶带式无级变速器 (6)
1.1.2 环盘滚轮式无级变速器 (6)
1.1.3 摆销链式无级变速器 (6)
1.1.4 金属带式无级变速器 (7)
1.1.5 CVT汽车能节油的原理 (9)
1.1.6 无级变速器使用的注意事项 (9)
1.1.7 CVT未来的发展趋势 (10)
1.2 本章小结 (11)
第2章金属带式无极变速器基本工作原理 (11)
2.1 金属带式无极变速器基本组成 (13)
2.2 金属带式无极变速器的几何关系和基本参数 (15)
2.3 金属带式无极变速器传动参数设计 (19)
2.3.1 输入轴参数设计 (19)
2.3.2 金属带轮参数设计 (20)
2.4 本章小结 (22)
第3章金属带式无极变速器传动和承载能力校核 (23)
3.1 摩擦传动原理和摩擦因数 (23)
3.1.1 摩擦传动原理 (23)
