The Cam-based Function Generating Transmission is a novel mechanism that takes two inputs, an angular rotational input and a ‘gear ratio’ selection, and outputs an angular rotation with a variable speed ratio. This transmission has unique characteristics such as generating specific functional speed ratio outputs including dwells, for a constant velocity input.
Mechanical Goals and Objectives
The CIVT mechanism receives a rotational input through the input shaft, which drives two sun pulleys through one-way clutches. Each sun gear is connected to two planet pulleys mounted upon a carrier. Each planet gear drives one follower assembly. As the follower moves outward, it causes the carrier to rotate faster then the sun gear, with the amount of speed increase being determined by the particular profile of the cam and the planet to sun pulley ratio.