Road-rail dual-purpose vehicle

A road-rail dual-purpose vehicle, comprising a vehicle frame (1), a suspension (2) and a single-axle bogie (3), wherein the vehicle frame (1) comprises two longitudinal beams (1a) arranged in parallel;

• the two longitudinal beams (1a) are connected by a longitudinal beam connection plate (1b), and a lifting airbag mounting seat (1c) is provided between the two longitudinal beams (1a);
• a load-bearing airbag insertion hole is formed on a lower cover plate (1a1) of the longitudinal beam (1a) at a position corresponding to the lifting airbag mounting seat (1c);
• a load-bearing airbag mounting seat (1d) is installed in the load-bearing airbag insertion hole, and a bearing bolster (1e) is installed on an outer side of the longitudinal beam (1a);
• the suspension (2) comprises an axle assembly (2a);
• a lifting airbag (2b) is installed in the middle portion of the axle assembly (2a) at a front end thereof, and a primary load-bearing airbag (2c) is installed on either side of the axle assembly (2a) at a rear end thereof;
• a secondary load-bearing airbag (2e) is installed on a top surface of each of two primary load-bearing airbags (2c) through a supporting seat (2d);
• a top surface of the lifting airbag (2b) is installed on the lifting airbag mounting seat (1c), and a top surface of the secondary load-bearing airbag (2e) is installed in the load-bearing airbag mounting seat (1d);
• the single-axle bogie (3) comprises a framework (3a), and an axle box (3b) is installed on a bottom surface of the framework (3a) at each end thereof;
• a wheel-axle assembly (3c) is installed between the two axle boxes (3b), and a primary damping spring assembly (3d) is provided between the axle box (3b) and the framework (3a);
• a brake assembly (3e) is installed at each of two ends of the bottom surface of the framework (3a) at a position corresponding to a wheel of the wheel-axle assembly (3c);
• a vehicle frame connection assembly (3f) is provided at each of two ends of a top surface of the framework (3a), and the framework (3a) is installed on a bottom surface of the bearing bolster (1e) through the vehicle frame connection assembly (3f),
• wherein a coupler seat (1j) is provided between front ends of the two longitudinal beams (1a), and a tight-lock coupler (4) is installed inside the coupler seat (1j) through a coupler pin.