Scissor lift mechanism

thingiverse

This is a scissor lift mechanism I designed to raise and lower a pit in a robot combat arena. It utilizes a Pololu 37D motor (300rpm in this case) and a 6mm diameter leadscrew/nut, linked via a 6mm-6mm brass coupling. A 6x15x5mm bearing secures the other end of the 100mm long leadscrew in place. For the base, top, lift arms, and spacers both STL files for 3D printing and DXF files for laser cutting from 6mm MDF are included. If laser cutting is used, four side and two end pieces must be cut to glue to the top and bottom plates. The motor, nut, and bearing mounts all require 3D printing. The main part of the mechanism uses M5 bolts and threaded rod to hold it together and allow articulation, but 3/16 bolts/threaded rod can also be used. Similarly, while it was designed to use M4 bolts to attach the motor and bearing mounts to the base, 5/32 bolts should also work. Four M3 bolts secure the leadscrew nut to its mount as that is what the holes on the nut are tapped for. Note: I mistakenly uploaded the wrong motor/nut/bearing mounts originally; they should now be correct. Images still don't seem to display correctly, and I have no idea why.