Understanding a mechanical motor device

I need to understand the mechanics of a hexagonal axle going through a motor, just like this video [url removed, login to view]

I am particularly interested on the gearing involved.

A simple link to a site with some drawings will work for me.

Maximum budget is $10

工程 工业工程 机械工程 机电一体化 火箭工程

项目ID： #13503455

关于项目