Mast raising structure and process for high-capacity mobile lift crane

Mast raising structure and process for high-capacity mobile lift crane

  • CN 101,293,620 B
  • Filed: 04/28/2008
  • Issued: 06/20/2012
  • Est. Priority Date: 04/26/2007
  • Status: Active Grant
First Claim
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1. method of assembling movable crane, said hoisting crane comprises:

  • when assembling, have the car body of movable ground engagement member;

    Revolving bed, said revolving bed are rotationally attached to said car body so that said revolving bed can rotate with respect to said ground engagement member;

    Be installed in the cantilever on the anterior part of said revolving bed pivotally, and the winch hoist cable extends out from said forearm;

    Mast, said mast are installed on the said revolving bed at its first end place and have and the said first end second opposed end;

    Said method comprises;

    A) said mast is transported to the working space that separates with said revolving bed;

    The position that makes said mast never connect said revolving bed moves to the position that can link to each other with said revolving bed, said mast is connected to said revolving bed and said mast is positioned at primary importance cross said revolving bed so that it extends back;

    B) utilize the hydraulic actuating cylinder that is connected to said revolving bed equally so that said mast carries out pivotal rotation by its primary importance around its junction that is connected to said revolving bed;

    Make said second end of said mast be promoted to the second place thus, in this second place makes the operating process of picking up, move and placing of said mast at hoisting crane, be used;

    AndThe said mast that c) further will be in its second place is connected to said revolving bed;

    So that when cantilever described in the operating process of picking up at hoisting crane, moving and placing changes with respect to the angle of the plane of rotation of revolving bed;

    Make said mast be in the fixed angle place, wherein after second end of said mast is promoted to the second place, carry out said mast and be connected to said revolving bed in its second place with respect to the plane of rotation of revolving bed.

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