LIFTING BOOM Russian patent published in 2021 - IPC B66C23/04 

FIELD: hoisting-and-transport machines.

SUBSTANCE: invention relates to hoisting-and-transport machines with articulated-rod booms. The boom of the lifting device contains a root section and a stick associated with it. The root section is made in the form of a hinged triangle with two sharp corners. The handle is made of two pivot hinge triangles with two sharp corners and a connection common to both triangles. The hinge triangles of the root section and the handle are made of rods. The root section and the handle are interconnected by means of rods that are parallel to each other and are pivotally connected at one end with the rods of the root section, and at the other with the rods of the handle. At one end, the truss of the root section, consisting of rod joints, is mounted on the turntable by means of supporting devices, and at the other end it is mounted on a common axis, on which the rods of two hydraulic power cylinders are mounted, and at its base, two hydraulic power cylinders are mounted with the base of the lifting device by means of supporting rotary devices. The turntable is mounted on the base of the lifting device by means of a multi-way hinge. A drum with a cable is installed on the turntable. The cable from the drum goes around a series of movable blocks attached to the tops of the triangular trusses that make up the root section and the handle.

EFFECT: optimal distribution of tensile - compression loads on rods and flat trusses is ensured, and due to the operation of the turntable with a drum and two hydraulic power cylinders, the functionality is expanded.

1 cl, 5 dwg