Single-cylinder damper assembly free of jamming and capable of preventing pollution

The invention relates to a single-cylinder damper assembly free of jamming and capable of preventing pollution. The single-cylinder damper assembly comprises a cylinder body and a free piston, whereinthe free piston is inserted into the cylinder body and can do reciprocating motion. The interior of the cylinder body is divided by the free piston into a liquid chamber and a gas chamber. One end ofthe free piston is connected with a piston rod and is movably inserted into the cylinder body. A sealing ring is arranged between the free piston and the inner wall of the cylinder body. The single-cylinder damper assembly is characterized in that multiple sets of ring grooves are formed in the outer circle of the end, close to the gas chamber, of the free piston; and sticky resin is smeared in the ring grooves. The single-cylinder damper assembly free of jamming and capable of preventing pollution has the beneficial effects that collectable impurities are provided, and therefore jamming is prevented; and the friction