Patent ID: 11965406
Assignee: SOILMEC S.P.A.
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E  F

Claim 6:
7. An excavating machine, comprising:
an actuation unit for moving an excavator;
a main winch connected. through a main line, to the actuation unit, for lifting and lowering said actuation unit;
a secondary winch connected, through at least one secondary line, to the actuation unit, for lifting and lowering said actuation unit;
a primary driving circuit, which is a closed hydraulic circuit or an electric circuit, for driving the main winch;
an open hydraulic circuit for driving the secondary winch;
a first pressure sensor or a current sensor, associated with the primary driving circuit, for measuring pressure of a fluid or, respectively, intensity of an electric current, said fluid or said current being adapted to circulate in said primary driving circuit for driving the main winch;
a second pressure sensor associated with the open hydraulic circuit, for measuring pressure of a fluid adapted to circulate in said open hydraulic circuit for driving the secondary winch:
a pressure regulator for regulating the pressure of the fluid in the open hydraulic circuit;
a control unit configured for:
executing a combined operating condition, wherein the main winch and the secondary winch apply a force simultaneously to lift said actuation unit:
receiving signals related to values sensed by the first pressure sensor and the second pressure sensor, or by the second pressure sensor and the current sensor; and, based on such the values, controlling the pressure regulator so that the pressure of the fluid in the open hydraulic circuit, during the combined operating condition, takes a target value that is a function of: the pressure of the fluid in the closed hydraulic circuit or, respectively, the electric current in the electric circuit and

a mast;
wherein the actuation unit comprises a carriage slidably mounted on said mast, and a drill head connected to said carriage and adapted to rotatably move said excavator.