Hello:
The drawings of the utility model depend on the patent content you want to apply for. For example, for your agricultural machinery, you generally need at least views and cross-sections of specific technical parts of the agricultural machinery, and sometimes you also need a main view of the entire agricultural machinery.
There are not too many drawings. The principle of drawing diagrams is: draw all the parts mentioned in the instructions. It is enough for you to draw according to this principle.
Hope the answer is helpful to you.