Mattingly & Malur, PC
Hybrid construction machine
Provided is a hybrid construction machine capable of letting the operator immediately stop the swing structure by performing a stopping operation for ordinary construction machines even when the swing structure moves differently from the operator's will for some reason. The hybrid construction machine comprises: an inverter controller which outputs a PWM signal to an inverter and thereby controls the revolution speed of an electric motor; a first electric circuit including blocking means which blocks the PWM signal outputted from the inverter controller to the inverter in response to either an immobilization selection inputted through a gate lock lever switch or an OFF selection inputted through an ignition switch; and a second electric circuit including a swing brake solenoid valve which activates a swing brake in response to either the immobilization selection inputted through the gate lock lever switch or the OFF selection inputted through the ignition switch.
HITACHI CONSTRUCTION MACHINERY CO., LTD.
B Y E B E E E B B Y B B B H H Y B B Y Y
B60L Y02T E02F B60L E02F E02F E02F B60L B60L Y02T B60L B60L B60L H02M H02M Y02T B60L B60L Y02T Y02T
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Manabu Hidetoshi Kouji Manabu Takenori
Edamura Satake Ishikawa Sugiura Hiroki