Mobile lift crane with lift enhancing attachment

Mobile lift crane with lift enhancing attachment

  • CN 101,460,386 B
  • Filed: 05/11/2007
  • Issued: 09/05/2012
  • Est. Priority Date: 05/12/2006
  • Status: Active Grant
First Claim
Patent Images

1. movable crane comprises:

  • A) central crane unit, this central crane unit has vehicle body, movable ground attachment and rotation platform, and this rotation platform is installed on the vehicle body with rotatable swing attaching parts so that rotation platform can be swung with respect to the movable ground attachment;

    B) cantilever units;

    This cantilever units has boom support member, is installed in the cantilever on the boom support member and be installed at least one the movable ground attachment on the boom support member pivotally;

    So that by the weight of cantilever units movable ground attachment supporting cantilever, cantilever, boom support member and cantilever units movable ground attachment move as individual unit together whereby;

    C) counterweight element, this counterweight element have the counterweight on the counterweight strut member and are installed in the counterweight strut memberOn the movable ground attachment;

    AndD) rigging, this rigging connection cantilever and counterweight element are so that carry out balance by the load of cantilever lifting through counterweight;

    E) wherein cantilever units is connected on the central crane unit by first member and counterweight element is connected on the central crane unit by second member;

    Wherein this first and second member all carries clamp load and keeps cantilever units, rotation platform and counterweight element aligned with each other in the horizontal;

    But allow the relative perpendicular movement between cantilever units, rotation platform and the counterweight element;

    Wherein said movable crane also comprises main leg, and this main leg is installed in the junction of central crane unit, cantilever units and first member pivotally.

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