ARTICULATED TELESCOPIC BOOM Russian patent published in 2003 - IPC

FIELD: materials handling facilities. SUBSTANCE: invention relates to cranes-manipulators installed on trucks. Crane can be used both for reconstruction and erection of buildings, height not exceeding five storeys, in confined areas in cities and for other jobs, including those when boom is to be lowered below level of support of truck chassis on which crane is mounted. Proposed articulated telescopic boom of truck crane plant consists of fixed length base hinge-coupled with telescopic cantilever part. Novelty is that telescopic cantilever part of boom is formed by body and two telescopic sections, summary length of telescopic cantilever part with extended section exceeding the length of base by not more than 65%. Base is made in form of box-shaped housing and head of U-section. Base lifting drive includes first hydraulic cylinder whose rod is hinge-coupled with base, and lifting drive of boom cantilever part has second hydraulic cylinder whose housing is hinge-coupled with base and kinematic mechanism, in folded down state arranged inside U-shaped section head. Mechanism couples cantilever part of boom with head of boom base. Housing of second hydraulic cylinder is secured inside head, and its rod is hinge-coupled with kinematic mechanism. Invention provides optimum combination of function capabilities of lifting crane and crane- manipulator. EFFECT: enlarged operating capabilities. 7 dwg