METHOD TO CONTROL LOAD-LIFTING MACHINE DRIVE Russian patent published in 2008 - IPC B66C23/88 B66C13/56 

FIELD: mechanical engineering; lifting and transportation machinery.

SUBSTANCE: invention can be used in automated protection and control systems of load-lifting cranes. Load-lifting machines drive is controlled by operator acting onto control member, transmission of shifting of said member to control member of drive made to shift any mechanism of load-lifting machine depending on movement of control member, and preliminary determination of tolerable value of at least one parameter characterizing load and/or spatial position of boom or load-gripping member of load-lifting machine, keeping the parameter value in memory, measuring said parameter by direct or indirect method in process of operating of load-lifting machine, comparing measured value with tolerable value and subsequently shaping drive control signal. Control signal is used to interlock shifting of drive control member and if, necessary, to reset member in neutral position. Interlocking of drive control member is done by mechanical blocking of transmission of control member shifting to drive control member or mechanical interlocking of displacement of said member.

EFFECT: increased reliability.

6 cl, 3 dwg