Mechanics
Pedals
To fix the electric motors of both pedals, we have welded and screwed
(because double made is always better :-) ) a framework of square pipes.
The usual idea was, to fix the electric motors on a wooden plate. But after
we have made some inquiries, we have reached the conclusion that this wooden
plate would not sustain the load of the electric motors. That's the reason for
our decision to use the square pipes. These square pipes have also a much more
bigger moment of inertia. And if you are honest to yourself: It looks really
really cool :-)
To fix the motors in their right position, we have used a fixture which is
made of aluminium rails (you can also call it "force fit" - for our
needs the cheepest and ideal solution). These force fits are fixed with screws
on the framework.
The electric motors have a maximum lifting force of 1100N (app. 110kg). More
than enough for the work they have to do. A potentiometer is used to gather and
to control the instantaneous position of the electric jack.
Steering wheel
The motor for the steering wheel (60rpm, torque: 8Nm) is also fixed by a
force fit made of aluminium rails and screwed on the framework.
Transmission of force is realized by a chain and two chain wheels. Each
chain wheel is fixed on the shaft of the electric motor and of the steering
wheel.
To get the information in which position the wheel is, we have also fixed
a potentiometer on the shaft of the electric motor.