| 摘要 |
PURPOSE:To improve a motor part cooling effect by arranging pressure fluid flow chamber so as to surround a motor part outer periphery to communicate the flow chamber with a pump chamber inlet port. CONSTITUTION:A rotor 5 is spline-engaged with the tip part of the drive shaft 3 of an electric motor, and plural vanes are fitted to the motor 5 to abut on the cam ring of a pump chamber 6. A reservoir tank 7 is arranged so as to cover the outer periphery of a pump housing 2 to be communicated with the sucking port 8 of the pump chamber 6. A cylindrical pressure fluid flow chamber 11 is arranged in the outer periphery of the motor housing 1 and is communicated with the reservoir tank 7, and an inlet port plug 13 is fitted to the opposite side of a pump part. This constitution supplies pressure fluid flowed-in to the pump part via the outer periphery of the motor part, absorbing the heat of the motor part into the pressure fluid flowing the outer periphery. |
