| 摘要 |
A mast section (20) for a mast of a crane, comprising: -girder members (22, 23) along a longitudinal direction (Z); -truss members (26, 27) connected to the girder members; -hinge connections(28, 29) connecting the truss members to the girder members; -slide connections(30) connecting the truss members to the girder members(23); -a scissor hinge connection (34) connecting the truss members at a crossing point under a crossing angle; wherein the mast section is configured to transition between: -an extended state wherein the girder members are spaced at a nominal distance (∆Xn) along a transverse direction (X) and the truss members are at a nominal crossing angle (αn), and -a retracted state wherein the girder members are spaced at a reduced distance along the transverse direction and the truss members are at a reduced crossing angle. |
