pic: 3 speed concept - 1st gear

[Arefin Bari]

Originally Posted by David Guzman

I have always wonder about this kind of shifting, how long can a gear box like this last?

I had this idea a while ago but I didn't think it would work because of the gears hiting when shifting. What do you all think about using brass for one of the gears that meshes and steel for the other one. I think since brass is a softer metal it would start to take the shape needed to shift properly.

I know there was a team that use this method and had four speeds, i think it was team 33 but im not sure? someone please correct me if wrong.

Dave

When you build a robot for FIRST you really want the gearbox to last the season. There has been mesh gearbox made before and used in FIRST which lasted longer.

The best way to do this is by beveling the gear teeth edges so it would mesh properly. Personally I would 20 dp gears. If you do use brass, I fear that the teeth will sheer off.

Yes it was team 33 who has done the 4 speed back in 2004 and they used mesh shifting. It was very cool. Team 195 also used something like 33's 2004 tranmission this past season.