Chassis assisting in passing through steel rail turnout and rail detector

The utility model relates to the technical field of track detection, and provides a chassis assisting in passing through a steel rail turnout and a track detector, and the chassis assisting in passing through the steel rail turnout comprises a frame body, a movable wheel assembly, a fixed wheel assembly, a first guide structure and a second guide structure, the movable wheel assembly is movably arranged at the first end of the frame body in the first direction, and the fixed wheel assembly is arranged at the second end of the frame body. The first guide structure is arranged at the first end of the frame body, the second guide structure is arranged at the second end of the frame body, and the first guide structure and the second guide structure extend in the second direction; wherein the first direction is perpendicular to the second direction, and the chassis assisting in passing through the steel rail turnout is used for driving in the second direction; the first guide structure assists the movable wheel as