HYDRAULIC POWER UNIT WHICH HAS FLEXIBLE JOINTING AND SEALING STRUCTURE BETWEEN SUBMERGING OIL PUMP AND OILTANK, AND WHICH HAS SURFACE COOLING DUCT USING AIR FROM COOLING FAN OF OIL PUMP DRIVING MOTOR

摘要

The present invention relates to a hydraulic power unit structure used to drive hydraulic devices such as injection molding machines, hydraulic presses, and machine tools.;According to the present invention, the assembly, in which the oil pump 16 and the electric motor 4 are rigidly coupled, is disposed in the lower space of the oil tank, the majority of which is included in the oil tank plane projection area, and the flexible plate 22 ) Is sealed and joined to one circumference of the oil pump-electric motor assembly in a hole provided in the center, and the rim and the seal of the through hole provided in the oil tank lower surface 1b or 1c on the outer edge of the flexible plate 22. While being joined to form a bending connection structure, the oil pump 16 is provided with a structure for immersing the inside of the oil tank, and the air discharged from the cooling fan 9 of the electric motor 4 for driving the oil pump 16 is oil. By constructing a duct carver leading to duct outlets 37 and 38 provided on the tank surface,;It uses very little installation space, has a simple and clean appearance with built-in hydraulic piping, low noise operation, thin oil tank walls, and increased oil tank surface heat dissipation.