Opening and closing method and opening and closing mechanism of convertible movable top cover of railway freight wagon

An opening and closing mechanism of a convertible movable top cover of a railway freight wagon wherein the convertible movable top cover is arranged on the wagon, and the convertible movable top cover comprises a first convertible movable top cover and a second convertible movable top cover;

• and the first convertible movable top cover and the convertible movable top cover can be respectively furled and opened from a middle part of the wagon to both ends of the wagon;
• the opening and closing mechanism comprising a belt driving mechanism, wherein the belt driving mechanism comprises a first rotating wheel and a second rotating wheel which are rotatably connected to both sides of the wagon through a first rotating shaft, a third rotating wheel and a fourth rotating wheel which are rotatably connected to the both sides of the wagon through a second rotating shaft, and a driving belt;
• the driving belt comprises a first driving belt and a second driving belt;
• the first rotating wheel and the third rotating wheel are in matched transmission connection by the first driving belt;
• the second rotating wheel and the fourth rotating wheel are in matched transmission connection by the second driving belt;
• one end of the first convertible movable top cover is connected with one side of a first driving belt;
• the first outer convex portion is arranged on the end of the first convertible movable top cover;
• the other end of the first convertible movable top cover is fixedly connected to the wagon;
• one end of the second convertible movable top cover is connected with one side of the second driving belt;
• a second outer convex portion is arranged on the end of the second convertible movable top cover;
• a moving direction of the side of the first driving belt is opposite to a moving direction of the side of the second driving belt;
• the other end of the second convertible movable top cover is also fixedly connected to the wagon;
• and a first stopper device and a second stopper device are respectively arranged on a ground on the both sides of the wagon;
• when the wagon moves, the first stopper device comes into contact with the first outer convex portion to drive the belt driving mechanism to rotate in one direction, so that the first convertible movable first top cover and the second convertible movable top cover are respectively furled and opened from the middle part of the wagon to the both ends of the wagon;
• when the wagon continues to move in the same direction, the second stopper device comes into contact with the second outer convex portion to drive the belt driving mechanism to rotate in another opposite direction, so that the first convertible movable top cover and the second convertible movable top cover are extended and closed from the both ends of the wagon to the middle part of the wagon.