PRINCIPLE AND CHARACTERISTICS FOR ORIGINAL

NON-FRICTIONAL MECHANICAL CONTINUOUSLY

VARIABLE TRANSMISSION

NIE Songhui^{1, 2}  LIU Hongzhao¹  QIU Aihong²

(1. School of Machinery and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048;
2. School of Mechanical Engineering, Xiangtan University, Xiangtan 411105)

Abstract: Based on the principle of transmission and variable speed, utilizing the characteristic of hypocycloid, a kind of original non-frictional mechanical continuously variable transmission(CVT) is proposed, which combines planet gear transmission and similar sine mechanism. On the basis of completing structure design, the characteristic parameters are studied. The analysis results show that this CVT is a kind of impulse CVT, output velocity wave is less under high velocity running, while wave is bigger on the contrary. Since the transmission ratio value can be changed from one to infinite, output shaft may stop revolving under no stopping machine. So, it may serve as a clutch.

Key words: Continuously variable transmission Hypocycloid Planet gear Sine mechanism Impulse

CLC No: TH132.46

国家自然科学基金(50575180)和湖南省教育厅基金(04C654)资助项目. Received 20060801, received in revised form 20070605