Disclaimer: I am not an engineer - just a DIY guy looking for some advice or help please, so please forgive me if I use incorrect terminology :)
I am building a cabinet that has a hidden inner cabinet that is meant to rise up out of the former. The inner cabinet needs to rise
500mm and needs to support a maximum weight of
40kg (including the weight of the inner cabinet carcass itself).
I am on a budget with this build at home, so I'm trying to use either parts I already have or low-cost ones. I figure that I have 3 options available:
1. Motorised Scissor Lift This will just simply be 2 pairs of arms, where the bottom pivot points are connected to a shaft that rides horizontally along a 16mm stainless steel threaded rod (powered by a small geared 12V DC motor). The top and bottom pivot points will ride along steel rails on bearing wheels. The arms will be made from 50mm wide mild/carbon steel with a thickness of 5mm.
2. Poor-man's Linear Actuator Off-the-shelf linear actuators are horrifically expense where I'm from, so I took to understanding the mechanics involved and sought to try building one myself. My small proof of concept using the same 16mm stainless steel threaded rod (riding inside a seam-less steel pipe for sturdiness which is not shown in the image above), connected to the same motor works. However, I'm uncertain if the motor is powerful enough to turn the rod.
The above is an alternative although I'm not convinced this will be as sturdy as the first option. Plus the motor will have to ride up and down.
With each option, I aim to ensure that the inner cabinet slides along some sort of linear rail to avoid any "wobbling" as it rises and drops.
The motor I'm using rated as follows: DC GEARED ROUND BRUSH MOTOR, 12VDC, 0.6A, 1:30 REDUCTION 270RPM, 2KG/CM
I fear that my motor might be under-powered to achieve the necessary lift, so would truly appreciate the community's help on this and the which of the above options would be suitable. Also, please advise me if the standard stainless steel threaded rod is okay, or if a trapezoidal lead screw would be more suited.
My sincerest thanks in advance. PS - sorry for the long post!