3D printer forming platform lifting structure

The utility model relates to a lifting structure of a forming platform of a 3D printer. The utility model discloses a 3D printer forming platform lifting structure. Leveling detection mechanism, the leveling detection mechanism comprises a mounting base, a first platform, a second platform, a spring, a probe, a shaft sleeve, a rack, a gear, a wheel carrier and an angular displacement sensor; a printing head is installed at the bottom of the installation base, four probes which are evenly distributed in an annular array mode are arranged on the outer side of the printing head, the upper ends ofthe probes penetrate through the installation base and extend to the position above the installation base, the tops of the probes are fixedly connected with a first platform, a second platform is arranged above the first platform, and springs are arranged between the second platform and the first platform. The relative level of the printing platform is detected through the four probes, lifting and leveling of the printin