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Working machine and method for operating working machine

  • US 9,624,646 B2
  • Filed: 09/18/2014
  • Issued: 04/18/2017
  • Est. Priority Date: 11/13/2013
  • Status: Active Grant
First Claim
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1. A working machine comprising:

  • a machine frame;

    a cabin disposed on the machine frame;

    a boom disposed on a side of the cabin;

    an auxiliary attachment configured to be attached to and detached from a tip end portion of the boom;

    an actuator configured to be activated by an operation fluid and to activate the auxiliary attachment;

    a solenoid valve having a solenoid and being configured to control, based on a control signal outputted to the solenoid, a pilot pressure being a pressure of a pilot fluid different from the operation fluid;

    an auxiliary control valve configured to supply, based on the pilot pressure controlled by the solenoid valve, the operation fluid to the actuator;

    an operation member having a head portion;

    a first switch being disposed on the head portion of the operation member and being operable to set an operation amount;

    a second switch being disposed on the head portion of the operation member and being operable by being pressed, the second switch being configured to automatically return to an initial position; and

    a control unit configured to detect an operation of the first switch and an operation of the second switch, the control unit further being configured to;

    output a control signal based on the operation amount of the first switch,continuously output the control signal to the solenoid of the solenoid valve when the operation of the first switch is detected after detecting a release of the operation of the second switch under a state where the operation of the second switch is detected, andrelease a continuous mode by further performing the operation of the second switch under a state where the control unit is in the continuous mode or to release the continuous mode by further performing the operation of the first switch under a state where the actuator is activated in the continuous mode.

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