Piston rod with good air tightness

The utility model discloses a piston rod with good air tightness, which comprises a piston rod main body, one end of the piston rod main body is connected with a piston connector, and both sides of the outer wall of the piston rod main body are provided with first mounting ring grooves. According to the utility model, the first mounting ring groove is adopted; the antiskid ring is convenient to mount; the anti-skid ring plays an anti-skid sealing role; the sealing performance of the piston rod body is improved; the movement range of the piston rod main body is limited between the two anti-skidrings; the movement length of the piston rod body is conveniently set; the limiting protection effect is also achieved on the mounting piece; the mounting hole is convenient for connecting the pistonrod main body with connecting equipment; besides, in the moving process of the piston rod body, the piston rod body moves along the interior of the mounting piece, in the process, the soft brush continuously sweeps the piston