Material crushing device for mining machinery

The utility model discloses a material crushing device for mining machinery, including device main part and grinder, device main part left side is equipped with the grinder, and the grinder transmission is connected in the device main part, reducing mechanism inside is equipped with four and hits the son greatly, and every hits greatly, and the son is inside to be equipped with two and to hit theson for a short time, in pivot high -speed rotation process, the son is hit to the size can be in a special balanced state, when the son contact is hit to import of through -put material and size, thebalance that the size was hit between son and the pivot can be broken in the twinkling of an eye, it accelerates the rotational speed in the twinkling of an eye to make the size hit the son, hit under the syngamy crushingly completely with the material in the accelerated size of bilayer, the water sprayer can prevent that rubbing crusher from producing the dust, and then great reduction the pollution that causes the envir