Can Anyone Design This System in Catia?
4 Answers

To design this assembly requires some specifications. This schematic of the drive to a machine, electric motor, vee-belt drive, gear train and coupling can't be designed without knowledge of power/torque being fed into the machine, along with the required shaft RPM at the coupling. Then The size and speed of the motor can be specified, the vee-belt and pulleys, the gear train with suitable ratio and tooth module, this enables the gear center distance " dim a " to be calculated, the shaft sizes and bearings. Once all the specifications required for the basic parts have been determined get a piece of paper make a more detailed sketch with sizes of the components, of how you think a basic structure that holds the basic machine together could be built. Next from the web sites of the suppliers of components you are going to use, you would download 3D models of these parts, if possible, otherwise you will need to model them yourself. Open up your CAD program, in this case Catia, but this basic process works for all of the cad programs and even the old fashioned hand drawn mechanical drafting approach, then produce the required models and drawings required to supply a craftsman the information required to build this machine section.
But as I see from your profile you have a BS.c mechanical engineering, this basic process of design should be fairly familiar to you

I have created a new question that relates to this one
https://grabcad.com/questions/no-cad-required#answer-43646