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US 10,480,158 B2Granted
Working machine
AssigneeSumitomo(S.H.I.) Construction Machinery Co., Ltd.
InventorYoshimitsu Yuzawa
Life of this patent
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Abstract
A working machine is disclosed. A boom supports an arm. An upper revolving body supports the boom. A lower traveling body mounts the upper revolving body in a rotatable state. A hydraulic actuator drives a hydraulic oil while relieving the hydraulic oil. A first pump supplies the hydraulic oil to the hydraulic actuator. A pump state detector detects load of the first pump. A controller reduces a flow rate of the hydraulic oil from the first pump to the hydraulic actuator when the pump state detector detects a predetermined state.
Claims8
A working machine comprising:
- an arm;
- a boom that supports the arm;
- an upper revolving body that supports the boom;
- a lower traveling body that mounts the upper revolving body in a rotatable state;
- a first hydraulic actuator that is driven while a relief valve relieves a hydraulic oil;
- a first pump that supplies the hydraulic oil to the first hydraulic actuator;
- a second hydraulic actuator that is driven by the first pump;
- a control valve that switches a flow of the hydraulic oil in order to supply the hydraulic oil discharged by the first pump to the first hydraulic actuator;
- a pump state detector that detects load of the first pump;
- a hydraulic actuator state detector that detects load of the first hydraulic actuator;
- and
- a controller that reduces a flow rate of the hydraulic oil from the first pump to the first hydraulic actuator in a case where the hydraulic actuator state detector determines that a detection value of the hydraulic actuator state detector exceeds a predetermined pressure,
- wherein the hydraulic oil is supplied at the reduced flow rate to the second hydraulic actuator, when a combined operation of the first hydraulic actuator and the second hydraulic actuator is performed.
10 more elements
Dependencies are inferred from the claim text.