Device capable of quickly dismounting expansion sleeve of rocker arm assembly of vertical mill

The utility model provides a device capable of rapidly dismantling a vertical mill rocker arm assembly expansion sleeve. The device comprises a lead screw nut, an adjusting lead screw, a claw plate, a fastener and a supporting frame. The two supporting frames are symmetrically arranged and fixedly connected through the fixing block in the middle, a plurality of clamping grooves are formed in the upper portions of the supporting frames, the lead screw nut is in threaded connection with the adjusting lead screw, the adjusting lead screw is in threaded connection with the fixing block and penetrates through the fixing block, the claw plate is arranged between the supporting frames in a penetrating mode, and a through hole is formed in the claw plate and used for containing a fastener. The two ends of the fastener are placed in the clamping grooves. The device is simple in structure and convenient to manufacture, the expansion sleeve of the rocker arm assembly can be quickly grabbed, and the expansion sleeve of t