Grain vibration screening machine

A grain vibration screening machine comprises two layers of screen frames arranged up and down, a rack, a motor, a rotating shaft and connecting rods, the rotating shaft is a crankshaft, the connecting rods are arranged on the crankshaft respectively and movably connected with the two layers of screen frames arranged up and down, the screen frames are movably connected to the rack, the screen frames serve as sliding blocks, and the crankshaft, the connecting rods and the sliding blocks form a crank sliding block mechanism. The screening function is achieved through reciprocating motion of the screening frame serving as the sliding block, and the screening efficiency of sundries in grains is improved. 一种粮食震动筛选机，包括上下设置的两层筛框、机架、电机、转轴、连杆，所述转轴为曲轴，曲轴上分别设置连杆与上下设置的两层筛框活动连接，筛框活动连接在机架上，筛框作为滑块，曲轴、连杆、滑块构成曲柄滑块机构，作为滑块的筛框的往复运动实现筛分功能，提高粮食中的杂物筛选效率。