2results about How to "Avoid eccentric rotation" patented technology

The utility model relates to a concrete pump oil cylinder anti -impact anti -looseness piston assembly belongs to piston technical field, and its key points are that the piston fixed seat roll surface joint sealing washer is provided with first docking disc on one side, and the other side is detachably provided with sealing seat, the other side of first docking disc is provided with piston rod, and the end has second docking disc, and the two docking discs are reinforced with upper and lower half moon clamping blocks, and sealing seat is inserted with piston fixed seat and is fixed with bolt, second docking disc has positioning insertion rod, and first docking disc has positioning insertion hole for alignment, and half moon clamping block is aligned through convex grain and recess joint, and is fastened with bolt.