Cover deploying system utilizing active material actuation
A system for deploying and stowing a cover, including a mechanical assembly coupled to the cover, preferably comprising a plurality of deploy arms and synchronization means, and reconfigurable between deployed and stowed conditions, and further including an actuator presenting an active material element operable to undergo a change, when activated, and operable to cause the assembly to reconfigure as a result of the change.
1. A system for deploying a cover utilizing active material activation, said system comprising:
an assembly including at least one sliding slot securely coupled to the cover, first and second sliders securely coupled to and linearly translatable relative to said at least one slot, and first and second deploy arms pivotally connected to said first and second sliders respectively and defining first and second stationary arm pivot points, and reconfigurable between deployed and stowed conditions wherein the cover is respectively deployed and stowed; and
an actuator including an active material element operable to undergo a change when activated,
said actuator being drivenly coupled to the assembly and configured to impart a linear translation force upon the arms such that the arms are caused to pivot as a result of the change, and the cover and assembly are caused to switch between the deployed and stowed conditions as a result of pivoting the arms,
wherein each deploy arm includes telescopingly engaged inner and outer arm sections and a cam concentrically aligned with the pivot point, each deploy arm is biased towards a fully extended condition, a cable interconnects the inner sections of each arm, and the cable and cams are cooperatively configured such that the cams engage the cable and the inner sections are caused to retract, as the arms pivot.
2. The system as claimed in claim 1 , wherein the element presents first and second crossing shape memory alloy wires, each connected to one said first and second deploy arms and a fixed point.
3. The system as claimed in claim 1 , further comprising:
first and second stowing assist springs housed within distal end sections of the slot, such that the springs are caused to be compressed by the sliders, when the arms are in the deployed condition.