Emergency stop system for work machine, work machine and emergency stop procedure for work machine

摘要

An emergency stop system for a work machine (1), said work machine (1) comprising work equipment (3), said emergency stop system comprising: an emergency stop switch (45); a work equipment control unit (81, 82 83) arranged to control a stop of the work equipment (3); a power source (44) adapted to supply power to the work equipment control unit (81, 82, 83); 401) arranged to connect the power source (44) and the work equipment control unit (81, 82, 83); a first relay (41) and a second relay (42) connected to the power supply line (401) and arranged to control a power supply to the work equipment control unit (81, 82, 83); anda second relay control unit (80) for controlling the second relay (42), wherein the second relay control unit (80) is arranged to detect whether the emergency stop switch (45) is opened or closed and is arranged to judge whether an emergency stop is required, depending on the respective operating conditions of the components of the work machine (1), the first relay (41) being controlled by the emergency stop switch (45) and the power supply line (401) disconnects (401) in an emergency, when the emergency stop switch (45) is turned on, the second relay control unit (80) controls the second relay (42) to disconnect the power supply line (401) when Emergency is detected while the emergency stop switch (45) is turned on, or the emergency stop is judged necessary, and when the power supply line (401) by the first relay (41) or the second relay (42) disconnected and the power supply to the work equipment ungs control unit (81, 82, 83) is stopped, the work equipment (3) is stopped.