Rotatory hinge of dedicated hidden biax of refrigerator car

The utility model provides a pair of rotatory hinge of dedicated hidden biax of refrigerator car, moreover, the steam generator is simple in structure, and reasonable design, first hinge is through a hinge fixed block and the A second hinge formula structure that fuses, the hinge fixed block is the U -shaped structure, first hinge uses the central line of hinge fixed block to be the axial symmetry setting as the symmetry axis with A second hinge, the door is being opened or when closed, sound is less, can not produce the dead phenomenon of card, and the service life of the air compressor is prolonged, need not frequent maintenance and change, practice thrift a large amount of manpowers, and material resources, and lower cost. Simultaneously set up the latch on the second fixture block, promote holistic locking effect, avoid producing the phenomenon that drops, promote holistic security performance, easy operation, it is convenient, more can satisfy the demand of producer.