Cabin door locking device of opening-closing mechanism

The utility model discloses a cabin door locking device of an opening and closing mechanism. The device comprises a cabin door, a rotating arm, a locking mechanism, an air cylinder, a deflector rod, an unlocking rod and a frame, one end of the rotating arm is fixed to the cabin door, the other end of the rotating arm is connected with the frame through a rotating shaft and an air cylinder, the rotating arm is clamped with the locking device in a limited mode, the locking mechanism is connected with a shifting rod, the shifting rod is connected with an unlocking rod through a gear and rack assembly, one end of the locking mechanism is connected with the air cylinder, and the air cylinder is installed on the frame. Through rigid connection of the cabin door and the rotating arm, the cabin door rotating arm is directly locked, conversion of motion trails is avoided, after locking is completed, the cabin door can be firmly locked, and the situation that the cabin door shakes and a gap occurs is avoided. The locki