Locking structure for cross head and piston rod nut

The invention belongs to the field of compressors, and specifically discloses a locking structure for a cross head and a piston rod nut. The locking structure for the cross head and the piston rod nutcomprises a cross head body, a gland, and a nut used for locking a piston rod, wherein the gland is fixed to the cross head body through a gland bolt. The locking structure for the cross head and thepiston rod nut is characterized by further comprising an anti-loosening unit for fixing, wherein the anti-loosening unit comprises first bolts, a steel wire rope, an anti-loosening rack and an anti-loosening gear; the anti-loosening gear and the nut are coaxially fixed; a thread through hole is formed in the anti-loosening rack, and the anti-loosening rack is engaged with the anti-loosening gear;the first bolts form thread fit with the anti-loosening rack and fix the anti-loosening rack onto the cross head body; and a steel wire hole is formed in each first bolt, at least two first bolts arearranged, a steel wire hole