| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance ventilation performance of a control board by installing a ventilation passage of the control board in a machine room side. <P>SOLUTION: In an electric work machine in which electric power supplied from outside to a slip ring is sent to an electric motor through a feed line via the control board, a duct 18 which is the ventilation passage of a control board 13 is provided to a wiring route of feeders 11, 12, and the duct 18 is used for ventilating the control board 13 and also used as a route of the feeder 11, 12. In addition, an exhaust cylinder 19 of the duct 18 is disposed in a cooling airflow in a machine room 3 so as to suck out air in the duct 18 by a Venturi effect. <P>COPYRIGHT: (C)2012,JPO&INPIT |
