The invention belongs to the field of mechanical machining equipment and particularly relates to a portal crane. The portal crane comprises a crane span structure, wherein a rigid leg is fixed below the crane span structure, a travelling mechanism is arranged at the lower part of the rigid leg, a flexible leg is connected between the crane span structure and the rigid leg, a ladder and an operation room are arranged between the rigid leg and the flexible leg, a slide rod is arranged at the lower end of the crane span structure, an electric hoist is arranged on the slide rod, a slide wheel rack A and a slide wheel rack B are respectively arranged on the two sides of the upper end of the crane span structure, a pulley block is arranged between the slide wheel rack A and the slide wheel rack B, a hanger component is connected below the pulley block. According to the portal crane disclosed by the invention, a mode of combining the rigid leg with the flexible leg is adopted without a cantilever and a single-girder truss structure, so that section steel or butt-welding section steel welding is adopted, the rigid leg and the flexible leg are connected though a bolt, the rigid leg and the crane span structure are connected through a pin roll. The portable crane is low in structural cost and convenient to use and operate.


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    Title :

    Portal crane


    Contributors:
    WANG SUNI (author) / WANG HAIYUN (author)

    Publication date :

    2015-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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