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CabinBike™ enclosed motorcycle by Fred Nelson Fabrication


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Cabin Bike door


Door hinge pin. Steel tube, two bronze bushings, 5/16ths rod



Two more bronze bushings are pressed into the hinge tabs.



Steel re-enforcement.  The hinge corner of the door is re-enforced with steel.



The steel hinge reinforcing plate is screwed to the aluminum door



Door cable spool. I made a small spool with a nut welded to it. A cotter pin secures the nut to the drill motor shaft.



Drill motor shaft mod. I removed the shaft from the drill thinking I would need to weld to it, however, the mod only required shortening and drilling a hole in the output shaft which could actually have been done without completely disassembling the drill.


Drill motor, clutch, and spool. The door motor, a modified 12 volt drill, is located on the starboard side of the vehicle. A cable runs overhead to the door 'slider' on the opposite side of the vehicle.


 I removed the 'trigger' from 2 cordless 12 volt variable speed drills and mounted them in a hobby project box. I drilled and tapped the end(s) of the box so the trigger can now be adjusted with an bolt and lock nut. One trigger is used to adjust the "UP" speed, the other for the "DOWN" speed.  Seen here with only the first trigger installed.

 Here we see both triggers mounted inside the box and wired (one is face down, the other face up up). The box is mounted to the rear of the firewall. I wanted to have a speed adjustment so I could fine tune the up and down speeds independently.  Otherwise, the door would close faster than it would open (because of the weight of the door).

 The system uses 2 common 12 volt relays mounted to the rear of the firewall. One relay closes the door, the other opens the door. Then, switches are located both outside and inside the vehicle. Switches operate the relays, relays operate the doors.  Relays keep the up and down circuits completely isolated from each other, required due to the configuration of the variable speed drill triggers.


Door latch striker CAD. 11 ga. steel.

I tried to keep the door latch as simple and light as possible.



Door latch with interior handle, 11 ga. steel.

Shown here assembled in the closed position. Eventually the door skin will separate the interior and exterior handles. A small magnet embedded into the lower sill holds the handle upright when the latch is open.


Exterior door handle, 11 ga. steel.

Shown here assembled in the open position.


Door structure parts. Lower and upper sections.






(Above) The clutch built into the door motor prevents damage to the system.



(Above) Door hinge geometry