Trackless steel beam inspection vehicle

The invention relates to a trackless steel beam inspection vehicle, and belongs to the technical field of bridge inspection vehicles, the trackless steel beam inspection vehicle comprises a plurality of connecting blocks arranged at the bottom of a steel beam at equal intervals in the axis direction of the steel beam, and further comprises a main beam and a first stop assembly, the main beam is slidably arranged at the bottom of the steel beam, and the main beam is located at the bottoms of the connecting blocks; the two first stopping assemblies are arranged at the two ends of the main beam correspondingly. The first stopping assembly comprises a connector, a suction head and a connecting rod body, the connector is fixedly arranged on the side wall of the main beam, a through hole is formed in the side wall of the connector, a vent groove is coaxially formed in the connecting rod body, the suction head is arranged at the top of the connecting rod body, and the connecting rod body is arranged on the side wall