SPRING-LOADED THRUST BLOCK FOR TOWER CRANE WITH LIFTING BOOM Russian patent published in 2009 - IPC B66C23/26 

FIELD: mechanics.

SUBSTANCE: proposed spring-loaded thrust block comprises block housing fixed part accommodating movable part for it to move along the housing, springs arranged on the housing fixed part to interact with the said movable part. Aforesaid fixed part accommodates telescoping rod, its one end being furnished with an eye articulating joint with the crane tower frame. Aforesaid thrust block housing hollow fixed and movable parts are furnished with flanges at least one spring being fitted there between. Note here that the first telescoping part of aforesaid telescoping rod moves in the cavity of fixed part of the housing, while the second movable part of the said rod moves in the rod first part cavity. The housing movable part cavity accommodates guiding flange, rigidly attached to the fixed part end face. The end face of the telescoping rod first moving part accommodates the other guide flange arranged in the housing fixed part. Aforesaid guide flanges have holes to communicate cavities of the housing fixed and movable part with that of the first root telescoping rod.

EFFECT: higher reliability and expanded performances.

3 cl, 5 dwg