Strength enhancing structure at position of auxiliary car frame installation support assembly of car cabin longitudinal beam

The utility model provides a strength enhancing structure at the position of an auxiliary car frame installation support assembly of a car cabin longitudinal beam and belongs to the technical field of machinery. The strength enhancing structure solves the problems that an existing auxiliary car frame installation support assembly of a car cabin longitudinal beam is poor in energy absorption effect and low in safety performance. The auxiliary car frame installation support assembly comprises an installation support and a nut plate, wherein the installation support comprises a nut installation portion and a connection portion which is arranged in a bent mode relative to the nut installation portion and has an abutting face corresponding to a surface structure at the corresponding position of the cabin longitudinal beam. The strength enhancing structure comprises a connection portion and an installation cavity with an opening, wherein the installation cavity is fixedly welded with the cabin longitudinal beam and enclosed by the surface of the installation support and the surface of the cabin longitudinal beam. The nut plate penetrates into the installation cavity, is fixedly welded with the installation support, and comprises a cover portion for covering the opening of the installation cavity, and the cover portion is fixedly welded with the cabin longitudinal beam. The strength enhancing structure at the position of the auxiliary car frame installation support assembly of the car cabin longitudinal beam is good in energy absorption effect and high in safety performance.