Underpan structure of road-rail operating vehicle

The invention relates to the technical field of road and railway engineering construction vehicle underpans, and particularly discloses an underpan structure of a road-rail operating vehicle. The underpan structure comprises a double walking system underpan vehicle frame structure, a road walking system and a railway walking system, and the double walking system underpan vehicle frame structure comprises a #-shaped beam and a vehicle body frame structure; the railway walking system comprises a driving part and a driven part, the driving part comprises two independent supporting leg structures and two driving wheels, and the two supporting legs are connected with the vehicle body frame structure by driving supporting leg oil cylinders; the driven part comprises a driven shaft, a rotating arm assembly and two driven wheels; the road walking system comprises front and rear transmission shafts, front and rear driving bridges and four big wheels. The underpan structure of the road-rail operating vehicle has the ad