The past few years have set a trend for lifting games, where one can leverage the use of an elevator to not only complete basic game tasks but also an elevator based lift to complete end game tasks. Since the release of the Rev Neos, I’ve wanted to design with them, so I decided to take a shot at a Neo based elevator drive system.
During my research the fastest elevator I came across was by Team 1501, thieir 2018 Power Up elevator powered by a Vex Pro Ball shifter with 3 mini cims. By far the most powerful elevator drivetrain was Team 1678’s 2019 Deep Space triple hab 3 capable bot, powered by 4 775 in their custom gearbox.
My goal was to match the speed and power shown by both teams by leveraging the power, weight, and size advantages of the Neos. I also took inspiration from Team 118’s spool solution from their strung continuous elevator on their bot this year.
The final product is a 4 Neo triple reduction gearbox, with the first stage as a basic reduction, and the middle stage containing the shifter, with a shifter spread of 3.64x. The last reduction is an 18th:24th belt and pulley system which serves as a more effective center to center spacer for weight and space savings, and small reduction to the proper final desired gear ratios.
The gearbox outputs to a 1/2in hex shaft which contains 4 “drums”, each used for collecting string from the up or down runs for the continuous elevator, mirrored on both the left and right side for 2 parallel runs each.
If anyone knows how to make the spiral grooves seen on 118’s bot in CAD, please let me know, I’ve still been stumped by this.
High gear: 99.2in/sec (5.99:1)
Low gear 27.2in/sec(21.82:1)
According to JVN’s calculator, it should be able to lift 550 pounds within 30amp breakers!
11.082lbs (Estimated using Inventor and Vex Pro Product descriptions)
As this is my first CD cad design post, please let me know what you think, criticism is appreciated!