Pinion and rack type eddy current damper

The utility model belongs to the technical field of civil engineering structure damping, and relates to a gear rack type eddy current damper, which comprises a protective cover, at least one group of permanent magnets, a piston rod, a gear, a conductor turntable and a pressed spring, the permanent magnets are respectively arranged on the upper side and the lower side in the protective cover so as to form a magnetic field in the protective cover; the piston rod is inserted into the protective cover and meshed with a gear rotationally installed in the protective cover, the piston rod is movably connected with the protective cover so that the piston rod can move in the axial direction of the piston rod, and the conductor rotating disc is fixedly connected to the gear so as to rotate along with the gear and cut magnetic induction lines to form the eddy current damping effect. The size of the conductor turntable is larger than that of the gear; the two compressed springs are installed between the two ends of the p