Crosshead box and plunger pump

A crosshead box, comprising:

• a substantially rectangular box body formed by an integral forming process and provided with a front end surface, a rear end surface, an upper end surface, a lower end surface, and a side end surface;
• a plurality of crosshead cavities in the crosshead box, each of the crosshead cavities extending in a longitudinal direction of the crosshead box and running through the box body, and the plurality of crosshead cavities being arranged in a transverse direction of the crosshead box;
• at least one multi-functional structural hole in the crosshead box, each of the at least one multi-functional structural holes extending in the longitudinal direction of the crosshead box and running through the box body;
• and
• an in-line lubricating oil pathway, the in-line lubricating oil pathway being oil holes and oil channels formed in a cast casing of the crosshead box and in communication with each other, and the in-line lubricating oil pathway comprising at least one primary oil pathway and at least one branch oil pathway.

A crosshead box, comprising:

• a substantially rectangular box body formed by an integral forming process and provided with a front end surface, a rear end surface, an upper end surface, a lower end surface, and a side end surface;
• a plurality of crosshead cavities in the crosshead box, each of the crosshead cavities extending in a longitudinal direction of the crosshead box and running through the box body, and the plurality of crosshead cavities being arranged in a transverse direction of the crosshead box;
• and
• an in-line lubricating oil pathway, the in-line lubricating oil pathway being oil holes and oil channels formed in a cast casing of the crosshead box and in communication with each other, and the in-line lubricating oil pathway comprising a primary oil pathway and a branch oil pathway.