A little warning: There is a LOT more pushing force this year than last year, so be careful about the pins breaking or the wheel home breaking. You got away last year because you are only pushing goals over a slope... This year will be a lot of robots puching your drive train.
Imagine all those force pushing on the robot, and that in turn push the wheels around the shaft, and the powered shaft being pushed the other way by the motor.
It sounds like you guys are using the wheel hub small parts made for the skyway wheelchair wheels. Those are not the best material to pin through on the wheel.
And then, if you guys are putting BOTH sprocket and wheels on the shaft, why have the sprocket there if you are powering the shaft? Or the other way around, why power the shaft when you have are sprocket next to the wheel?
It would be much easier and stronger if you use the sprocket connect to the motor with chains. Let the wheels spin freely on the shaft, and sandwich the sprocket between two wheels. Just have enough spacers to clear the chain from the wheels.
If you can successfully attach a sprocket on the shaft of the wheel, you can easily attach a sprocket to the motor powered shaft, and use that to drive chain to your wheels.
|