Hehe, I really feel when I see this course design. Unfortunately, I didn't have the electronic manuscript at that time, so I'll give it to you. But you can get the mechanical design published by Northwestern Polytechnical University, which contains many examples of calculating gears and checking strength. Select the motor that meets the design requirements first, and then consider whether to use cylindrical spur gear or helical gear. The most difficult thing is the calculation of gear. There are examples of mechanical design in Xigong University.

We couldn't do anything at that time, because we hadn't even seen the reducer before. So I suggest you look at the model or the real thing of the reducer first.

Also, copying is easy, I have the courage to do it myself, and I have a sense of accomplishment.