Design and analysis of a novel wheel type continuously variable transmission. (January 2017)

• Record Type: Journal Article
• Authors: Chen, Xinbo; Hang, Peng; Wang, Wei; Li, Yan
• Is Part Of: Mechanism and machine theory. Volume 107(2017:Jan.)
• Page Start: 13
• Page End: 26
• Publication Date: 2017-01
• Subjects: Continuously variable transmission -- Traction wheel -- Contact model -- Sliding losses -- Transmission efficiency; Machine theory -- Periodicals; Machinery -- Periodicals; Machines -- Périodiques; Génie mécanique -- Périodiques; Machine theory; Machinery; Periodicals; 621.81
• DOI: 10.1016/j.mechmachtheory.2016.08.012
• Languages: English
• ISSNs: 0094-114X

Abstract

Abstract: In order to explore new kinds of continuously variable transmission (CVT) with high torque capacity and transmission efficiency, a novel wheel type CVT (W-CVT) is proposed. Same as toroidal CVT and ball-type CVT, it transmits power by friction on the contact points between input and output discs. W-CVT is composed of transmission mechanism and speed changing actuator, and CATIA model is drawn to explain the component parts and working principle of W-CVT. Equations for its theoretical transmission ratio are derived based on schematic diagram. Theoretical analyses including force and kinematic analyses are carried out to evaluate the mechanical property and kinematic feasibility of W-CVT. Based on theoretical analyses, equations for its transmission ratio calculation are modified. Additionally, influences of elastic sliding coefficient and friction coefficient on transmission ratio are discussed. Finally, transmission efficiency of W-CVT is analyzed considering elastic sliding losses and geometrical sliding losses. Highlights: A novel wheel type CVT (W-CVT) with high torque capacity and transmission efficiency. Evaluation of the mechanical property and kinematic feasibility of W-CVT. Discussions of influence factors on transmission ratio ​of W-CVT. Transmission efficiency analysis of W-CVT considering sliding losses.