Special tool for quickly positioning movable scroll plate

The utility model relates to the technical field of tool clamps. The utility model discloses a special tool for quickly positioning a movable scroll plate. Bottom plate, connecting holes are formed inthe bottom plate, three support blocks distributed along the circumference are fixed on the top surface of the bottom plate; an air cylinder is fixed to the outer side of each supporting block on thebottom plate. An air cylinder shaft of each air cylinder faces upwards; a connecting base is fixed to the side, close to the supporting block, of the upper end of each air cylinder. Connecting arms are arranged on the two sides of each connecting base, a pressing block is arranged on each air cylinder shaft, the inner end of each pressing block is rotationally connected with the corresponding aircylinder shaft, the two sides of the middle of each pressing block are rotationally connected with the upper ends of the corresponding connecting arms, the lower ends of the connecting arms are rotationally connected with the