Linkage door-opening device for mixer

Disclosed is a linked door-opening device of a mixing machine. At the external portion of a shell, a cylinder spindle nose 5 is separately connected with a drive shaft 9 and a driven shaft 3 via a driving rocking bar 8, an outer connecting bar 2 and an outer driven rocking bar 1, and the cylinder spindle nose 5 can drive the drive shaft and the driven shaft to rotate simultaneously. At the internal portion of the shell, the drive shaft and the driven shaft which extend into the shell are respectively connected with two discharging doors I 10, II15 via inner driven rocking bars I 13, II 18 and inner connecting bars I 12, II 17, two rotating shafts I 6, II 14 which extend into the shell are fixedly connected with the two discharging doors I, II respectively, thereby the rotation of the drive and driven shafts can drive the two doors to move around the two rotating shafts, which leads to the opening and closedown of the two doors, and the opening angle can achieve more than 90 degrees.