Sealing dustproof ring for SPD type piston rod

The utility model discloses a sealing dustproof ring for an SPD type piston rod. Piston cylinder, a piston rod is arranged in the piston cylinder body; the top end of the piston rod extends to the position over the piston cylinder body. The bottom of the outer side of the piston rod is sleeved with a dustproof ring body. The dustproof ring body is located over the piston cylinder body, an annularthrough groove is formed in the outer ring position in the dustproof ring body, a reinforcing ring is arranged in the annular through groove, a connecting ring groove is formed in the inner ring position of the bottom of the dustproof ring body, and a connecting ring is arranged in the connecting ring groove. According to the utility model, the piston rod, the annular plate, the mounting ring, thethrough hole and the hairbrush are matched for use; when the piston rod moves frequently, the outer side of the piston rod can be cleaned and brushed through the brush, meanwhile, the brush on the inner side of the mounting r