Lifting cart for building construction

A system comprising a panel handling mechanism coupled to a movable vehicle,

• wherein the panel handling mechanism comprises a clamp bar linking two clamps with each clamp having a clamping mechanism,
• wherein the two clamps are configured to be parallel for clamping on a same side of the panel,
• wherein each clamp comprises two flat jaws,
• wherein the clamping mechanism comprises a first hydraulic cylinder,
• wherein the first hydraulic cylinder is coupled to the jaws to move the jaws away from each other with a space between the jaws larger than a thickness of the panel, and to move the jaws toward each other to clamp on the panel,
• wherein the panel handling mechanism comprises a rotational mechanism for rotating the panel around an axis of rotation having a first direction perpendicular to a plane of the panel,
• wherein the rotational mechanism comprises a second hydraulic cylinder coupled to the clamp bar to translate a linear motion of the second hydraulic cylinder to a rotating motion of the clamp bar for rotating the panel clamped by the two clamps,
• wherein the panel handling mechanism comprises a linear mechanism for moving the panel in a second direction parallel to a plane of the panel,
• wherein the rotational mechanism and the two clamps are mounted on the linear mechanism so that the two clamps and the panel clamped by the two clamps move in the second direction regardless of the rotating angle of the rotational mechanism,
• wherein the linear mechanism comprises a third hydraulic cylinder mounted on a platform,
• wherein the panel handling mechanism comprises a tilting mechanism for rotating the panel around an axis of rotation having a third direction parallel to the plane of the panel and perpendicular to the first and second directions,
• wherein the tilting mechanism comprises a fourth hydraulic cylinder coupled to the movable vehicle to rotate the platform.