Longitudinal beam structure with protruding guide seat and excavator

The utility model discloses a longitudinal beam structure with a convex guide seat and an excavator in the field of excavator chassis. The longitudinal beam structure comprises a hollow longitudinal beam main body, first openings are symmetrically formed in the end part of the longitudinal beam main body in the vertical direction; second openings are symmetrically formed in the end part of the longitudinal beam main body in the horizontal direction; a guide seat is arranged at the second opening; the guide seat comprises a C-shaped guide plate; the width A of the C-shaped guide plate corresponds to the width of the second opening; turnups are arranged on the two sides of the C-shaped guide plate. The turned-over edge is connected to the longitudinal beam main body through a connecting assembly; the guide wheel shaft seat is arranged in the C-shaped guide plate; a guide wheel is arranged on the guide wheel shaft seat; the upper side and the lower side of the guide wheel extend out of the first opening; accordi