초록 ▼

An apparatus for controlling the lifting operation comprising an operation mode selection switch which is selectively set to an ordinary operation mode or to a lifting operation mode and a hydraulic circuit isolating means. The hydraulic circuit isolating means isolates the hydraulic circuit into a

An apparatus for controlling the lifting operation comprising an operation mode selection switch which is selectively set to an ordinary operation mode or to a lifting operation mode and a hydraulic circuit isolating means. The hydraulic circuit isolating means isolates the hydraulic circuit into a running drive hydraulic circuit which feeds the pressurized fluid of one of the variable-capacity hydraulic pumps to the actuators of the running apparatuses when the operation mode selection switch is set to the lifting operation mode and a hydraulic circuit for driving the apparatus on the side of the turning body, which feeds the pressurized fluid of the other variable-capacity hydraulic pump to the actuators other than those of the running apparatuses.

대표청구항 ▼

An apparatus for controlling the lifting operation in a construction machine comprising a lower running body including a pair of running apparatuses, an upper turning body provided on said lower running body to freely turn thereon, an operation machine swingably mounted on said upper turning body, a

An apparatus for controlling the lifting operation in a construction machine comprising a lower running body including a pair of running apparatuses, an upper turning body provided on said lower running body to freely turn thereon, an operation machine swingably mounted on said upper turning body, actuators for actuating said running apparatuses, said upper turning body and said operation machine, and a pair of variable-capacity hydraulic pumps for feeding pressurized fluid to said actuators, wherein it further comprises: an operation mode selection means which is selectively set to an ordinary operation mode or to a lifting operation model; and a hydraulic circuit isolating means for isolating the hydraulic circuit into a running drive hydraulic circuit which feeds the pressurized fluid of one of said variable-capacity hydraulic pumps to the actuators of said running apparatuses when said operation mode selection means is set to said lifting operation mode and a hydraulic circuit for driving the apparatus on the side of the turning body, which feeds the pressurized fluid of the other variable-capacity hydraulic pump to the actuators other than those of said running apparatuses.