Title:
MOTOR PUMP
Document Type and Number:
Japanese Patent JP2018017136
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a motor pump having a structure capable of restricting reduction in torque efficiency.SOLUTION: An inner rotor has a first hole part recessed from the other surface in an axial direction to one surface in an axial direction and a second hole part recessed from the one surface in an axial direction to the other surface, a pump cover is protruded from a pump cover main body to the other side in an axial direction and inserted into pump cover and has a supporting protrusion for supporting the inner rotor. Between an outer surface of a shaft in a radial direction and an inner surface of the first hole part in a radial direction is arranged a first clearance allowing a motion of the inner rotor in a radial direction against the shaft and between the outer surface in a radial direction of the supporting protrusion and the inner surface in a radial direction of the second hole part is arranged a second clearance allowing motion of the inner rotor in a radial direction in respect to the supporting protrusion. The pump cover has a fluid passage connected to a first opening opened between the inner rotor and the outer rotor in a radial direction and a second opening connected to the first opening and opened to the second hole part.SELECTED DRAWING: Figure 3
Inventors:
OTAWA TORU
Application Number:
JP2016146112A
Publication Date:
February 01, 2018
Filing Date:
July 26, 2016
Export Citation:
Assignee:
NIDEC TOSOK CORP
International Classes:
F04C2/10; F04C15/00
Attorney, Agent or Firm:
Shiga International Patent Office
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