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As one of transmission mechanisms, continuously variable transmission (CVT) can transfer energy depending upon rotation speed or torque generated by rotation power transferred from input axis to output axis. It is known that the CVT is mechanism that can change gear ratios continuously in power transmission installed in vehicles, or power generation and its transfer systems. In this paper, we propose a CVT using a new type of mechanism in which four-bar linkages (quadric crank chains) and non-invertible elements such as one-way clutches or ratchets are installed. The conventional CVTs which are classified as belt-type CVTs or toroidal CVTs are driven by friction force between conduction mechanisms. Due to slippage or high-pressure between the transmission components in the conduction mechanism, the transfer efficiency in the conduction energy becomes inferior. However, the proposed CVT does not depend upon any friction forces, and it is considered that its transfer efficiency is superior.

Analysis of Mechanical Combined-Type CVT Consisting of Closed Links, Grooved Cam and Non-invertible Elements