I need help with a solution to increase the gear ratio/speed of a home project.
Quick backstory for this "project". My friends and I play a tabletop game and I thoroughly enjoy designing and 3d printing terrain and functional elements for our games. My latest project is a functional elevator. Every thing works beautifully as "designed", however I am no engineer, so most of the design was prototyping and a brute force approach.
What I am looking to improve on, is the speed of the lift.
It is powered by a 100 rpm 12v motor connected to 9v batteries. A 3:1 spur gear drives a worm gear mechanism to spin the center shaft and lift a center platform.
After initially hooking it up to one 9v battery, I realized I should have gotten a higher rpm motor. No worries, right, I'll just hook up additional 9 volt batteries in series. I'm up to three 9v(27v) in series, and it's at a barely acceptable lift speed. I'm not terribly worried about overheating the motor because run time is well under a minute but I feel like a gear solution is possible, however I'm trying to work within what I've already designed and printed. I could also just but a 300 rpm motor, but I own a 3d printer and am reasonably good with Fusion 360, so I'd like the design a solution.
Attached are some pictures. The biggest issue is space constraints. I designed the housing around the spur gears, so I have a fixed area to work with. I can make the gears "thicker" to protrude past the housing to be able to "interact" with whatever interesting solution someone can come up with. With in my design for the motor mounting plate I can also easily rotate the motor 90 degrees if needed. If anyone would like to offer some suggestions I would love to hear them!
Also if this is the wrong sub to ask and you have a suggestion for a better one please do let me know, thank you.
Here are some design specs for the spur gears
Teeth: 39 and 13 Module: 1 Pressure angle: 20 Over all width is 41mm and 15mm for existing gears