OIL PUMP

Japanese Patent JP2018040345

A

PURPOSE: To provide an oil pump capable of easily and efficiently assembling rotors and a driving shaft incorporated in a multi-row type pump and the like including the plurality of rotors.BACKGROUND ART:CONSTITUTION: An oil pump includes a pump housing D, a first externally-fitted tooth-shaped portion A1, a driving shaft A, a first rotor B of a first rotor chamber 51 having a first internally-fitted tooth-shaped portion B1, and a second rotor C of a second rotor chamber 61 having a second internally-fitted tooth-shaped portion C1 equal to the first internally-fitted tooth-shaped portion B1 and external teeth 3 of the same number. The first rotor B and the second rotor C can be mounted when a groove filling portion 22 and a tooth missing portion 42 are agreed to the driving shaft A. A set of a first suction port 53 and a first discharge port 54 of the first rotor chamber 51, and a set of a second suction port 63 and a second discharge port 64 of the second rotor chamber 61 have the equal shape. A phase of an external tooth 3 of the first rotor B and a phase of an external tooth 3 of the second rotor C, or a phase of a set of the first suction port 53 and the first discharge port 54 and a phase of a set of the second suction port 63 and the second discharge port 64 are agreed with each other, and the other are not agreed with each other.SELECTED DRAWING: Figure 1

IMAI TAICHI
HAYAKAWA YUKIHIRO
SEMBONGI YUJI
KASHIWA KEISUKE

JP2017124942A

March 15, 2018

June 27, 2017

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YAMADA SEISAKUSHO KK

F04C11/00; F04C2/10; F04C15/00

JP2015200302A	2015-11-12
JP2010053785A	2010-03-11
JP2005113894A	2005-04-28
JPS6014291U	1985-01-30
JP2009221981A	2009-10-01
JPS58173790U	1983-11-19

Kunio Iwahori

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