Model frame convenient for mechanical design teaching

The utility model discloses a model frame convenient for mechanical design teaching. The model frame comprises an adjusting plate, three placing plates connected to the outer side wall of the adjusting plate and arranged at equal intervals, and a plurality of clamping assemblies arranged at the tops of the placing plates. Supporting rods are rotationally connected to the outer walls of the two sides of the adjusting plate through rotating shafts correspondingly, cross rods are connected to the tail ends of the supporting rods, sleeve rods are arranged at the ends, away from the supporting rods, of the cross rods, a connecting rod is arranged between the two sleeve rods, and two symmetrically-arranged hinge seats are fixed to the top of the connecting rod through bolts; the hinge seat and the adjusting plate are hinged through a hydraulic telescopic rod; the clamping assembly comprises a fixing base connected with the top face of the containing plate, a backup plate obliquely fixed to the top face of the fixin