Annular cylinder for clutch on strip cigarette overhead conveying line

The utility model provides a cylinder for clutch on a strip cigarette overhead conveying line, comprising an annular plastic cylinder and an annular plastic piston. A U-shaped groove is arranged on one side of the plastic cylinder; the annular plastic piston is nested in the U-shaped groove; the side walls on both sides of the U-shaped groove are provided with sealing rings which are tightly contacted with the annular plastic piston; the plastic cylinder is further internally provided with a cylinder bar core; one end of the cylinder bar core is located in the plastic cylinder body and the other end is located in the annular plastic piston. When in use, the cylinder supports against a clutch assembly on a spindle; compressed air entering in the cylinder plastic cylinder body ejects one end of the cylinder bar core in the groove so that the other end of the cylinder bar core clamps down toward the annular plastic piston which extends outward, a movable cone in the clutch assembly is ejected away, a toothpick o