SELF-PROPELLED CRANE (OPTIONS) Russian patent published in 2021 - IPC B66C23/08 B66C23/40 

FIELD: mobile cranes.

SUBSTANCE: invention relates to mobile cranes with an additional drive system. The crane contains a car chassis (1), on which a support frame (2) and a turntable (3) are located, front (4) and rear (5) supports. The crane has hydraulic equipment including a fixed pump (6) driven by an internal combustion engine (7). An additional crane drive system includes an asynchronous three-phase electric motor with a squirrel-cage rotor connected to an external AC power supply, an adjustable hydraulic pump rigidly connected through a coupling to the shaft of an electric motor interacting with an electromagnetic contactor. The pump has an electrically controlled valve that receives a pulse-width modulated signal from the controller, to the inputs of which a foot pedal, a fixed speed button and a control panel are connected, which is connected to the input of the electromagnetic contactor.

EFFECT: invention provides the same efficiency of the crane from the external electrical network, as well as from the internal combustion engine, but with a lower noise level, not exceeding the permissible level in residential areas.

4 cl, 5 dwg