ROTOR AND DRIVING SHAFT IN OIL PUMP

Japanese Patent JP2017008787

A

PURPOSE: To provide a rotor and a driving shaft in an oil pump of high strength and rigidity, capable of easily and efficiently assembling the rotor and the driving shaft to be incorporated in a multi-row pump of an automobile.BACKGROUND ART:CONSTITUTION: An oil pump includes a first inner rotor B composed of internal fitting teeth of two-fold of external teeth 3, a second inner rotor C similarly constituted, and driving shaft A having a first external fitting tooth-shaped portion A1 and a second external fitting tooth-shape portion A2. Internal fitting teeth of a first internal fitting tooth-shaped portion B1 and a second internal fitting tooth-shaped portion C1 are provided with long teeth 41 and short teeth 42 disposed along a circumferential direction, and stop portions 22 are disposed in every other fitting grooves 21. Only when the short teeth 42 are inserted and fitted to the fitting grooves 21 provided with the stop portions 22, the first internal fitting tooth-shaped portion B1 is properly fitted to the first external fitting tooth-shaped portion A1, the second internal fitting tooth-shaped portion C1 is properly fitted to the second external fitting tooth-shaped portion A1, the first inner rotor B and the second inner rotor C are disposed on the driving shaft A, and the external teeth are shifted from each other by half tooth.SELECTED DRAWING: Figure 1

UEMATSU TOMOHIRO
IZUTSU MASATO
SEMBONGI YUJI
IMAI TAICHI
AOKI JUN
YAMANE KOSUKE

JP2015123917A

January 12, 2017

June 19, 2015

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YAMADA SEISAKUSHO KK

F04C11/00; F04C2/10; F04C15/00

Kunio Iwahori

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