CRANE OR SIMILAR MANIPULATING MECHANISM WITH BUILT-IN NODE FOR OVERCOMING DEAD POSITION BETWEEN PRIMARY AND SECONDARY PARTS OF ITS WORKING BOOM Russian patent published in 2021 - IPC B66C23/68 

FIELD: load-lifting cranes.

SUBSTANCE: crane with built-in node (10) for overcoming the dead position between primary (11) and secondary parts (12) of its working boom (1) contains at least a rigid supporting structure made with the possibility of attachment to the corresponding chassis and equipped with at least two telescopic support racks installed at least approximately vertically, and a rigid supporting mast, which in the area of its first end section is connected to the mentioned supporting structure. In the area of the second end section of the mast, working boom (1) is attached at point (91) of rotation, at which the mentioned boom is capable of rotation around the horizontal axis. Working boom (1) consists of primary part (11) and secondary part (12), which are pivotally connected to each other. Secondary part (12) in the area of mentioned point (92) of rotation is connected with the possibility of rotating around the horizontal axis with primary part (11) of working boom (1) by means of node (10) for overcoming the dead position. Node (10) contains rotary drive device (4), as well as mechanism (5) suitable for attaching that part of hydraulic cylinder (13) for rotating secondary part (12) relatively to primary part (11) of working boom (1), which can be attached to secondary part (12) of boom (1).

EFFECT: improvement in the design of the device is achieved.

6 cl, 7 dwg