The invention provides a special portal frame for a crane, and relates to the field of crane spare and accessory parts, the special portal frame comprises a rectangular frame body, stand columns and a lifting device, the bottom of the periphery of the rectangular frame body is fixedly connected with the corresponding stand columns, the lifting device is slidably connected to the rectangular frame body, and the rectangular frame body comprises long-edge fixing rods and short-edge fixing rods; the two long-edge fixing rods and the two short-edge fixing rods are connected end to end, and the two long-edge fixing rods are distributed along the central axis of the short-edge fixing rods in a mirror image mode. A protrusion is arranged on the side edge of the long-edge fixing rod, a sliding rail is arranged on the protrusion, limiting seats are arranged at the two ends of the sliding rail respectively, sliding blocks matched with the sliding rail are arranged on the sliding rail, drivers are arranged on the sliding blocks, the side edges of every two adjacent sliding blocks are connected to the two ends of the corresponding reinforcing rib, an engine is arranged on the outer side of the short-edge fixing rod, and the engine is electrically connected with a speed reducer and the drivers respectively. The speed reducer is fixed on the outer side of the short-edge fixing rod. The stability of the portal frame is improved through constant-speed sliding, the application range is expanded, the bearing strength is improved, and the firmness of the overall structure is enhanced.

    本发明提供了一种涉及起重机零配件领域的起重机专用龙门架,包括:长方形框体、立柱以及起吊装置,长方形框体四周底部分别固定连接有相对应的立柱,起吊装置滑动连接于长方形框体,长方形框体包括长边固定杆和短边固定杆,两个长边固定杆和两个短边固定杆首尾相连,两个长边固定杆沿短边固定杆中轴线镜像分布;长边固定杆侧边设有凸起,凸起上设有滑轨,滑轨两端分别设有限位座,滑轨上设有与之相匹配的滑块,滑块上设有驱动器,相邻两个滑块侧边连接于加强筋两端,短边固定杆外侧设有发动机,发动机分别电连接减速器和驱动器,减速器固定于短边固定杆外侧。本发明匀速滑动提高龙门架的稳定性扩大适用范围,提高承载力度,加强整体结构的牢固性。


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    Title :

    Special portal frame for crane


    Additional title:

    起重机专用龙门架


    Contributors:
    LU JIANXING (author)

    Publication date :

    2025-01-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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