This mechanism combines vertical screw lifting with a rotary drive to adjust both the height and rotation of the tabletop. The purple bevel gear turns the vertical threaded rod to raise or lower the green sleeve, while the pink gear meshes with a circular rack or ring beneath the tabletop, giving it a steady rotational motion during operation.

Components — Purple bevel gear, red threaded rod, green lifting sleeve, pink tabletop rotation gear, tan tabletop, vertical guide columns, lower frame, and supporting base.

How it works — Turning the crank rotates the purple bevel gear, which spins the red threaded rod. The green sleeve, threaded internally, climbs or descends along the rod to lift or lower the table. At the same time, the crank also drives the pink gear, which engages with the underside of the tabletop and causes it to rotate. The guide columns constrain the movement so the platform rises smoothly and rotates without wobble, allowing both height and orientation to be adjusted through the same hand input.

Applications — Rotary inspection tables, display stands, lifting turntables, photography platforms, and workstations requiring both vertical and rotational positioning.

Why it matters — Combining rotation and lifting in one compact mechanism allows precise positioning of objects without separate drives. The screw feed ensures stable vertical control, while the gear-driven rotation adds smooth orientation adjustment, making the mechanism versatile and mechanically efficient.