Mobile lift crane with variable position counterweight

Mobile lift crane with variable position counterweight

  • CN 101,311,102 B
  • Filed: 04/09/2008
  • Issued: 03/09/2011
  • Est. Priority Date: 04/09/2007
  • Status: Active Grant
First Claim
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1. method of operating mobile lift crane, described hoisting crane comprises:

  • Have the movably car body of ground engagement parts, wherein movably the ground engagement parts are defined as and are provided for keeping and ground ingear parts when move on ground at hoisting crane;

    Thereby be rotationally coupled to the turntable of face connecting part spare swing relatively on the car body;

    Be installed in the cantilever of turntable front portion pivotally, wherein ropes extends out from this cantilever;

    Be installed in mast on the turntable with its first end;

    At least one linear actuating device;

    AndRemovable counterbalanced weight unit;

    Described method comprises;

    A) under load the picking up of walking crane, move and place operation, wherein the picking up of walking crane, move and place in the process of operation, by flexible described linear actuating device the front portion of described turntable is shifted to and moved apart in described removable counterbalanced weight unit, with the described load of help balance;

    But, wherein running through the picking up of hoisting crane, moving and placing in the whole process of operation, removable counterbalanced weight unit is from can'"'"'t help ground supports, but is supported on the car body indirectly by described movably ground engagement parts.

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