The high-precision
piston rod connecting structure comprises a
piston rod, the upper end of the
piston rod is connected with a piston body, the lower end of the
piston rod is connected with a
crosshead, the upper end of the
crosshead is connected with a positioning
flange with a center hole, and the lower end of the
piston rod is a reducing end transited through a
conical surface section. The reducing end penetrates through the center hole of the positioning
flange and is stretched and locked by a first fastening structure; the upper section of the center hole of the positioning
flange is a taper hole matched with the
conical surface section of the
piston rod; the upper end of the piston rod penetrates into a center hole of the piston body, is stretched and locked by a second fastening structure and is provided with an anti-rotation structure. Automatic centering is achieved through
conical surface matching, stable pre-tightening force is provided in cooperation with a double-fastening structure, the problems that a traditional connecting structure is insufficient in precision and poor in locking reliability are effectively solved, the operation precision and stability of a compressor are greatly improved, and meanwhile the compressor connecting structure has the advantages of being convenient to install and maintain and long in service life.