Multi -stage crusher

The utility model relates to a crushing apparatus especially relates to a multi -stage crusher, contains casing, drive wheel, bearing frame, pivot, is provided with feed inlet and discharge gate on the casing respectively, is equipped with a plurality of crushing chamber of mutual intercommunication in the casing, and every crushing intracavity correspondingly is provided with the pivot, all is provided with the hammer reducing mechanism in the pivot, and the pivot is passed through the drive wheel and is connected with the driving motor transmission. The utility model has the advantages of simple structure and novel design rationally, can go on the oil shale rubble effectively crushing, reach the crushing back granularity 3mm of oil shale about, after the multi -stage reduction, 3mm grain size's oil shale reaches about 40%, and is crushing effectual, is favorable to going on of stirring procedure on next step, efficient. 本实用新型涉及粉碎设备，特别是涉及种多级粉碎机，包含机壳、传动轮、轴承座、转轴，机壳上分别设置有进料口和出料口，壳体内设有相互连通的多个粉碎腔，每个粉碎腔内相应地设置有转轴，转