Turnover structure of tunnel drying oven

The utility model discloses an overturning structure of a tunnel drying oven, which comprises a bottom plate, a supporting block fixedly connected to the upper end of the bottom plate, a supporting plate fixedly connected to one side of the bottom plate, a connecting frame fixedly connected to the upper end of the supporting plate, a semicircular frame and a shaft frame fixedly connected to the connecting frame, and a drying oven frame rotatably connected between the shaft frame and the supporting block. A linkage mechanism used for driving the oven frame to turn over is arranged on one side of the oven frame and comprises a limiting block, a turning rod is telescopically connected into the limiting block, a lantern ring is fixedly connected to the lower end of the turning rod, and a sliding block is fixedly connected to the outer side of the limiting block. By means of the semi-circular frame, when the limiting blocks move, the drying oven frame can be driven to turn over, when a product needing to be dried