| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an air cooling type hydraulic system of simple structure and high thermal efficiency, capable of using a conventional cooler and electric motor, and capable of removing heat from a surface of a control box for inverter control to enhance cooling ability for a control box inside. <P>SOLUTION: This air cooling type oil pressure generator 10 is provided with the air cooling type cooler 15 disposed adjacently to a motor-driven cooling fan 25 of the electric motor 13 for driving a hydraulic pump 12, and is constituted to cool a pump drain pipe 19 by an air flow from the motor-driven cooling fan 25, and the sealed type control box 29 is arranged to conduct the inverter control by providing a pressure oil tank 11 in a lee side of the motor-driven cooling fan 25. A height of control box 29 is made higher than an upper plate 11a of the pressure oil tank 11, and a clearance is provided between a backface of the control box 29 and the pressure oil tank 11. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
