Saturday, November 19, 2011
This is the finished model of my earlier Automatic CVT prototype. It contains 31 gears and roughly 2,500 pieces. The mechanical design has remained unchanged since the prototype, but numerous structural enhancements have been made to allow for operation at much higher speeds and torques. I plan to post a video of the transmission soon.
Saturday, November 12, 2011
This is phase two of my attempt to build a continuously-variable automatic transmission for use in gradually accelerating heavy objects to a very high speed without breaking motors and/or pieces. My first attempt was over a year ago (http://knexdesigns.blogspot.com/2010/10/knex-centrifuge-work-in-progress.html) which required an operator to manually adjust the torque output and had no variable gearing ratio. This new design, which uses two differential gear boxes, automatically switches the gear ratio between 1:1 and 1:6. Because the gear ratio is continuous, any ratio between 1:1 and 1:6 is possible, and acceleration between ratios is perfectly smooth. This prototype is fully functional, but still needs to be re-enforced and stabilized. I will post more as I continue work on it.