Pont élévateur à ciseaux - Moteur et interrupteurs de fin de course ou manivelle manuelle

Edit Added a coupler and mount for a stronger motor. Used the 111RPM version from this page: https://nl.aliexpress.com/item/1005007128966174.html?spm=a2g0o.order_list.order_list_main.34.64a079d2SaV4IW&gatewayAdapt=glo2nld Fits the same slots as the original and was able to swap them only removing the four bolts closest to the motor.

I wanted a helix to raise my trains up to a storage track but don't have the space for the helix... So I thought a Scissor Lift could work in much less space. Since I love to design I decided to make my own scissor lift! The first version had a hand crank handle and the last version included the proper motor to power the lift and two limit switches to control the max and minimum height. There are two screws that move the limits up or down.

Parts labeled B are the base pieces
Parts labeled L are the Scissor Lifts
Parts labeled T are the top pieces - this is designed my N scale tracks.

Not sure what to add for other uses, you can always message me if needed.
Here is a short video on the scissor lift! https://youtu.be/3PypvpnbY34

These are the limit switches I used:
https://nl.aliexpress.com/item/32273125391.html?spm=a2g0o.order_list.order_list_main.5.3f0279d2w7NW1w&gatewayAdapt=glo2nld

These are the motors - I used a 150RPM
https://nl.aliexpress.com/item/32987942205.html?spm=a2g0o.order_list.order_list_main.45.3f0279d2w7NW1w&gatewayAdapt=glo2nld

The up/down switch: https://www.aliexpress.com/item/4000413987958.html?spm=a2g0o.order_list.order_list_main.103.3f0279d2w7NW1w

The threaded rod is just a 17cm long M5 metric threaded rod.

Hardware required: All bolts are M3 diameter.
Normal head bolts:
The Crosses use 35mm bolts and washers (7)
Top/Bottom & limit switch adjustment screws 55mm (10)
Limit switch covers 16mm (4)
Transfer box (rides the threaded rod) 25mm (4)
One long 70mm bolt top & cross connection. (1) (Slider bolt that moves on the top section)

counter sunk heads:
Switch control cover 16mm counter sunk (2)
Also the Motor mount screws (2) depending on your motor

I used washers on all the crosses and moving parts unless it seemed impossible (only a few places).

Nuts are all locknuts and I use a vicegrip to push them into their holes before assembly.

Was asked to explain the wiring:
The DC motor has four wires in two pairs. One half of each pair goes to the limit switches and the other to the DPDT toggle switch (Double Pole Double Throw switch).
The DPDT reverses the polarity of the DC motor as well as which of the limit switches are energized. The DPDT toggle switch has six wires in total. The two in the middle go to the power source - a 12VDC plug. The two outer wires on one side of the DPDT go to each of the system's limit switches. With the last two from the other side going to the other pole of the DC motor.
The limit switches have three poles but only get a wire attached to the two outer connections with the middle one left empty. The end near the limit switch hinge wire goes towards the DC motor - one switch to each side of the motor. The other end of the limit switch wire goes to one side of the DPDT toggle switch and in the OUTER corners. Do the same with the other limit switch wire on the other motor pole and the SAME side of the DPDT switch. The other two wires from the motor go to the opposite side of the DPDT switch. Make sure that the motor wire to the DPDT toggle is paired with the other side limit switch.

So the wire's first path goes from one side of the DC motor to the hinge side of the limit switch, then one side of the DPDT. Then the other side of the DPDT wire goes directly back to the OTHER side of the DC motor.
The other path is just the reverse via the other limit switch.
If not sure how the switch works, use a continuity meter (the beep) to find which paths connect when the DPDT toggle is one way or the other.

Also asked to explain the build a bit more:
Basically the scissors (L parts) have a top cross and a bottom one. The middle cross can be just one as I have or a dozen for a taller unit. Assemble each of the three Lift parts (L) crosses together into the scissor. The base parts (B) connect to the bottom of the scissor. The part labeled B9 holds both M5 and M3 sized nuts for the main M5 threaded torque rod going from the DC motor and the side mounts between the base and lift. The top part labeled (T) is connected to the top of the scissor.
The M5 threaded rod spins with the motor. There is a M5 nut buried in the B9 piece which forces that part to move away or towards the motor pushing and pulling one side of the scissor with it raising and lowering the top.

Impression de base. Les ciseaux du haut et du bas sont uniques, mais celui du milieu peut être répété plusieurs fois pour obtenir une élévation plus importante. Tout le matériel est constitué de vis M3, de rondelles et d'écrous autobloquants insérés dans les poutres.