pic: Team 948 2-Speed Ball-Shifting Gearbox CAD Drawing

[Billfred]

So, just to make sure I understand the concept--the piston moves the larger piece inside the output shaft, which forces the balls out into the gears, engaging the gear?

[David Guzman]

Originally Posted by Billfred

So, just to make sure I understand the concept--the piston moves the larger piece inside the output shaft, which forces the balls out into the gears, engaging the gear?

Thats exactly right. In this one I am assuming there is going to be springs as the shaft and the plunge are two separate pieces.

[jfelser]

I was looking at the Inventor files and it shows the shaft that is connected to the piston and the piece that pushes the bearings as two separate pieces. However it shows that the shaft that goes to the piston has a recessed and the piece that pushes the bearings has an ID equal to the diameter of the recessed. I hope that is understandable.

Anyway my question is how are you going to insert one in the other?

Yes, that is true about the model. The model is not quite correct in that the larger end piece of the inner shaft (the one attached to the cylinder) will be removable. The reason the shaft is two pieces is so that the larger spool will be centered with springs on the smaller inner shaft, which will allow it to lag a little when it pushes the balls outwards which make shifting easier.

[David Guzman]

Originally Posted by jfelser

Yes, that is true about the model. The model is not quite correct in that the larger end piece of the inner shaft (the one attached to the cylinder) will be removable. The reason the shaft is two pieces is so that the larger spool will be centered with springs on the smaller inner shaft, which will allow it to lag a little when it pushes the balls outwards which make shifting easier.

Ok. Thaks for explaining.