DEWBOT XV PTO Gearbox
- The Rear HAB Climb Lift which lifts the rear part of the robot during the HAB climb
- The Front HAB Climb Lift which lifts the front part of the robot during the HAB climb
- The Lift which raises & lowers the Hatch and Cargo scoring mechanisms
The Rear & Front HAB Climb Lifts have similar requirements. They operate in concert but must be independent. Significant force, but moderate speed is needed to lift the 150 lbm robot to HAB 3 in 2-3 seconds. These systems operate only during the end-game HAB Lift Climb and are unused during the majority of the match period. These systems must mechanically lock and the locks must support the robot's mass.
In contrast, the Lift needs speed. The intent is to raise and lower the Hatch and Cargo scoring mechanisms into scoring or collecting positions in about a second. A great deal of effort was made to minimize the mass of the Hatch and Cargo scoring mechanisms and the lift which raises them. So high speed and moderate force needed. No mechanical locking is needed for the lift. The motors can support the mass of the Lift and Hatch and Cargo scoring mechanisms while in use. When unpowered, the lift is designed to stay at the correct levels by resting on hard stops. The Lift is used almost continuously during the majority of the match, but becomes unused during the end-game HAB Lift Climb.
Motors, gearboxes and motor controllers are heavy and the number or 40 A motors are limited by the Power distribution Panel (PDP). To conserve motors, a dual-output gearbox was designed to drive both the Lift and the forward HAB Climb Lift.
Two 775Pro motors power this gearbox.