The taper assembly is a core connecting precision assembly between the main shaft and mantle of gyratory/cone crushers, and an exclusive matching component for gyratory crushers. Mounted at the joint between the upper part of the main shaft and the inner cavity of the mantle, it serves as a key structural partfor realizing torque transmission, cone centering and load buffering. It is not a single part but an integrated assembly pre-assembled from components including the taper sleeve body, lock nut, positioning key and sealing ring. Its core function is to accurately transmit the eccentric gyratory motion of the main shaft to the mantle, while ensuring the coaxiality of the mantle and the main shaft and restricting the radial movement of the cone. It directly guarantees the operation precision of the mantle of gyratory crushers, prevents uneven wear of liner plates and substandard finished product particle size caused by cone deflection, and acts as an important core assembly connecting the crusher's transmission system and crushing actuator.