robotic leg exoskeleton 3d model

Flat metal footplate shaped like a human sole, 25 cm long and 6 mm thick, with three strap slots at heel, arch, and toes. The user's bare or socked foot rests completely on this plate, heel flush with the rear edge, toes near the front slots. Two parallel skids underneath provide rolling stability. From the plate's sides, two parallel lightweight alloy tubes rise vertically, spaced wide enough to accommodate the real calf between them, without crossbars, reaching 40 cm above ground to lift the heel. At knee level, a single-axis metal hinge aligns exactly with the user's knee joint, with an axle and locknuts visible outside, and a rear stopper limits forward bend to 15–20 degrees, matching natural gait. At the top, rigid C-shaped aluminum arches wrap around the outer sides of the thighs, holding the structure laterally. The entire leg — foot, shin, below knee, and thigh — is strapped to the frame by four 5‑cm‑wide nylon webbing straps, each fed through the plate slots or around the tube