Top opening type swing arm cam mechanism for container

The invention relates to a top opening type swing arm cam mechanism for a container. The top opening type swing arm cam mechanism for the container is composed of a container door (1), a swing arm (2), a swing arm connecting board (3), a swing arm front supporting board (4), a swing arm connecting pin (5), a swing arm back supporting board (6), a cam I (7), a cam II (8), a cam connecting board (9), an oil cylinder pin (10), an oil cylinder (11) and a cam (12). The top opening type swing arm cam mechanism for the container is characterized in that the oil cylinder (11) is connected with the cam connecting board (9) through the oil cylinder pin (10), the cam connecting board (9) is welded with the cam (12), the cam (12) is connected with the swing arm connecting pin (5) and rotates, the cam (12), the cam I (7) and the cam II (8) are welded into an integrated structure, the cam I (7) pushes the swing arm back supporting board (6) or the cam II (8) pushes the swing arm front supporting board (4), and the front-and-back movement of the swing arm (2) is realized. The top opening type swing arm cam mechanism for the container is small in lifting weight and has a self-locking function, the cam mechanism can be firmly locked even if the oil-way leakage occurs, and the door cannot be easily opened.