Scissor Jack

grabcad

An easy to unfold scissor jack design. 7.25 lbs. No tools required, no loose components or separate parts. Fits in the larger (26X14X16) envelope, but could possibly wedge into the smaller package diagonally. Eight captive hand knobs tighten the joints as well as the seat track and mounting plate clamps. They require approx 1 Nm of torque. The mounting plate slots into the same style clamps as the seat track and gets locked down when the hand knobs are tightened. Only 12 unique parts that require manufacturing. 104 total parts, 32 of them fasteners. Most parts are 6061-T6, but higher stressed parts use 7075-T6. Estimated total manufacturing cost for 2 systems is approximately $10000, mostly for small quantity machining of the struts. All other components are machined from easily sourced standard stock such as round tube, precision ground aluminum shaft, and off-the-shelf fasteners.