Star wheel position-fixing mechanism

A star wheel position-fixing mechanism is disclosed. The invention relates to the field of hull position fixing, in particular to the star wheel position-fixing mechanism for a dredger. The inventionprovides the star wheel position-fixing mechanism with simple structure, convenient operation and time saving. The star wheel position-fixing mechanism comprises a mounting plate, a first hydraulic cylinder, a supporting sleeve, a second hydraulic cylinder, a position-fixing sleeve, a connecting rod and a star wheel, wherein the first hydraulic cylinder is positioned on the inside of the supporting sleeve; the supporting sleeve comprises a hinge plate and a sleeve tube which are formed integrally; the hinge plate is in hinged connection with the mounting plate; one end of the first hydraulic cylinder is hinged with the mounting plate; and the other end of the first hydraulic cylinder is hinged with the hinge plate. The star wheel position-fixing mechanism can ensure that an entire hull will not float or swing duri