Protection device of vehicle-mounted charger

The utility model relates to the technical field of chargers, in particular to a protection device of a vehicle-mounted charger, which comprises a bottom plate, a frame is fixedly mounted on the bottom plate to form a cage-shaped structure, a mounting piece is fixedly mounted on the frame, screw holes are arranged on the mounting piece, track grooves are arranged on two sides of the frame, springs are arranged in the track grooves, and the mounting piece is fixedly mounted on the bottom plate. A spring is fixedly connected to the bottom plate, a pressing block is fixedly connected to the spring, a pressing rod is fixedly connected to the pressing block, a pressing piece is fixedly connected to the pressing rod, a supporting plate is movably arranged on the bottom plate, bottom feet are fixedly connected to the supporting plate, and the bottom feet and the pressing piece are connected to the two sides of the balance type balance bottom support structure respectively. The protection device can protect the vehic