Adapted torque motorisation system for deployable spatial structures

A motorization device, comprising:

• two substantially parallel winding cylinders,
• at least one linking element, the linking element being wound around said winding cylinders in a figure-of-eight shape such that the linking element has a figure-of-eight configuration defining a crossing point located between said winding cylinders, and
• two spiral-shaped flexible tracks, each one of the two spiral-shaped flexible tracks being fixed on and encircling a respective one of the two substantially parallel winding cylinders, the two spiral-shaped flexible tracks being arranged to face and touch one another at a contact point, a pre-stressing force being applied to the contact point of the flexible tracks under the effect of the linking element,
• the two spiral-shaped flexible tracks being arranged such that the contact point between the two spiral-shaped flexible tracks forms an axis parallel to axes of rotation of the winding cylinders, the axis of the contact point being offset relative to the crossing point of the linking element such that a torque generated by the pre-stressing force and a distance between the contact point and the crossing point is applied to the contact point, said torque being able to cause rotation of the flexible tracks.