Mobile lift crane with variable position counterweight

Mobile lift crane with variable position counterweight

  • CN 101,311,102 A
  • Filed: 04/09/2008
  • Published: 11/26/2008
  • Est. Priority Date: 04/09/2007
  • Status: Active Application
First Claim
Patent Images

1. , a kind of method of operating mobile lift crane, described hoisting crane comprises:

  • Has the movably car body of ground engagement parts;

    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, carry out and pick up, to move and place operation, wherein pick up, move and place in the operating process, described removable counterbalanced weight unit is shifted to and moved apart the front portion of described turntable by flexible described linear actuating device in execution;

    But wherein removable counterbalanced weight is from can'"'"'t help ground supports, but is supported on the car body indirectly by the ground engagement parts.

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