LOAD-LIFTING MACHINE BOOM ARRANGEMENT Russian patent published in 2002 - IPC

FIELD: timber industry; load-lifting equipment, such as manipulators. SUBSTANCE: boom arrangement of load-lifting machine has base on which articulated boom is mounted, power cylinders and drive of movable part of boom telescopic section made in form of hinge-coupled lever and tie-rod. Last section of articulated boom is telescopic, with movable and fixed parts. One of power cylinders is hinge-coupled with base and root section of boom, and other is connected with last section and with fixed part of telescopic section pf boom. Lever is hinge- connected with base and, means of additional member, with root section of boom, while tie-rod is connected by its free end with movable part of boom telescopic section. Additional member is hinge-coupled with lever and with root section of boom and is made of outer and inner parts installed for longitudinal displacement relative to each other. Inner part is spring-loaded relative to outer part with damper placed in between. EFFECT: reduced dynamic loads owing to mounting of flexible elements in additional member and increased reliability of boom arrangement. 2 cl, 2 dwg