Automatic seeding depth adjusting device of corn precision seeder

The utility model discloses an automatic seeding depth adjusting device of a corn precision seeder, which relates to the field of agricultural machinery and comprises a seeding device, a lower pull rod, a connecting rod, a fixed seat, an electric push rod, a displacement sensor, an upper pull rod and an adjusting rod, the fixed seat is arranged on a seeder rack, the displacement sensor is fixed on the inner side of the fixed seat, the upper pull rod is located behind the fixed seat and hinged to a hole in the upper portion of the fixed seat, the lower pull rod is located behind the fixed seat and hinged to a hole in the lower portion of the fixed seat, one end of the connecting rod is hinged to the fixed seat, and the other end of the connecting rod is hinged to the fixed seat. The other end of the connecting rod is hinged to the adjusting rod, the adjusting rod is arranged on the inner side of the upper pull rod and hinged to a hole in the back of the upper pull rod, the seeding device is hinged to holes in