CRANE ARM Russian patent published in 2021 - IPC B66C23/44 

FIELD: hoisting-and-transport machines.

SUBSTANCE: invention relates to hoisting-and-transport machines for carrying out loading-unloading and other works performed by mobile hoisting-and-transport units with limited carrying capacity. The crane-manipulator contains a base made in the form of a triangular truss, representing two hydraulic power cylinders and a rigid cross-member, on which the articulated-rod boom is hingedly mounted with the ability to rotate. The hinge-rod boom is made in the form of hinge-rod trusses. Two hydraulic power cylinders of a triangular truss of the base are located at an angle δ to each other and with their rods converge in a common multi-way hinge, which, with its trunnions, is mounted on the front upper rod resting on the front supports of the tetrahedral truss, and with its bases, two hydraulic power cylinders of the triangular truss are attached by means of a support rotary devices to the rigid cross member of the base of the triangular truss. The rods of the hinge-rod trusses are interconnected by means of movable hinges. An additional hydraulic power cylinder is installed at the base of the trusses that make up the boom hinge joints.

EFFECT: maneuverability of both the head of the articulated boom and the boom with a retractable load-carrying body is provided, which expands the service area in the horizontal and vertical planes of the crane-manipulator.

1 cl, 2 dwg