Single-cylinder shock absorber with inner and outer cylinder structure

The utility model provides a single-cylinder shock absorber with an inner and outer cylinder structure, which relates to the technical field of shock absorbers and comprises a cylinder body and a bottom cover, the bottom cover is mounted on the cylinder body, the cylinder body comprises an outer cylinder and an inner cylinder, an outer gas storage cavity is arranged between the inner cylinder and the outer cylinder and is arranged along the length direction of the cylinder body, an oil storage cavity and an inner gas storage cavity are arranged in the inner cylinder, and the inner gas storage cavity is communicated with the oil storage cavity. A floating piston is arranged between the oil storage cavity and the inner gas storage cavity, the inner gas storage cavity and the outer gas storage cavity are connected through a communication structure, an inflation structure is arranged on the bottom cover, and a piston valve is arranged in the inner cylinder and connected with a piston rod. The volume of the air st