Special automatic quick centering and clamping mechanism for shaft or sleeve components

The utility model provides a special automatic quick centering and clamping mechanism for shaft or sleeve components. The special automatic quick centering and clamping mechanism comprises a seat with a U-shaped section. A cylinder is arranged below the seat, a sliding connecting rod shaft is movably arranged in a sliding groove in the lower end surface of the seat, and the cylinder is connected with the sliding connecting rod shaft by a piston rod; two sliders are bilaterally symmetrically arranged in an upper slide rail of the seat, a pressure plate is arranged on the seat and is positioned above the two sliders, two connecting rods are symmetrically arranged in an inner cavity of the seat, one end of each connecting rod is connected with the sliding connecting rod shaft by a hinge pin, and the other ends of the two connecting rods are respectively connected with the two sliders by hinge pins; two centering elements are movably arranged on the two sliders via T-shaped grooves and are respectively fixed onto the two sliders by the aid of two locking blocks and locking bolts. The special automatic quick centering and clamping mechanism has the advantages that the shaft or sleeve components can be automatically centered and clamped by the special automatic quick centering and clamping mechanism, and the special automatic quick centering and clamping mechanism is high in clamping speed and wide in positioning range.