FULLY MOBILE CRANE Russian patent published in 2020 - IPC B66C23/36 

FIELD: transportation.

SUBSTANCE: invention relates to fully mobile cranes. Fully mobile crane comprises support frame (2) with front (4) and rear (5) extensible supports, on which there is mounting table (6). On rotary platform (3) cab (7) of crane with indication unit (9) of safety system, telescopic boom (10), mechanism (11) of assembly of counterweight (12), consisting of main plate (13) and other parts (15) counterweight. Mechanism (11) has two hydraulic cylinders (17) of lifting-lowering, to rods of which two rotary rockers (19) are attached. Counterbalance to rockers is secured by four axles (20) by means of brackets (21). Crane is equipped with counterweight weighting system. It includes strain gauge (22) for measuring mass of counterweight installed on bracket (18) of one of hydraulic cylinders (17). Sensor (22) is designed to take up load when counterweight (12) is lifted by hydraulic cylinders (17) and transmits signal to indication unit (9), which switches the valve to operation mode with counterweight corresponding to weighed mass. Inductive contact-free sensor (23) of presence of counterweight is installed on crossbar (24) of rotary platform. Control panel (26) of counterweight installation mechanism is located on rotary platform. Hydraulic distributor (27) with manual control is arranged in panel (26) and is intended for control of hydraulic cylinders (17). Counterweight weight measuring sensor can also be made in the form of tensometric axis (28) installed as an axis of attachment in rotary frame (3) of one of hydraulic cylinders (17).

EFFECT: higher safety of crane operation due to elimination of human factor by identification of exact value of weight of counterweight and automatic selection of corresponding cargo characteristics of crane.

3 cl, 8 dwg