公开(公告)号：US20200072214A1

公开(公告)日：2020-03-05

申请号：US16547959

申请日：2019-08-22

Applicant: TOYODA GOSEI CO., LTD.

Inventor： Shinya SAKAI ,  Seongjun PARK ,  Takeshi HATTORI

IPC: F04C2/10

Abstract: An oil pump includes: a first core in which an inner rotor having external teeth and an outer rotor having internal teeth are housed; a housing having a recess in which the first core is held; a second core disposed in contact with the first core in an axial direction; and a cover having a holding hole in which the second core is held. The first core has a first recess/projection portion formed on a first axial end surface at a side opposite to an axial end surface opposing a bottom wall of the recess. The second core has a second recess/projection portion formed on a second axial end surface that is in contact with the first axial end surface. A gap is formed between opposing surfaces of the housing and the cover in a state where the first and second axial end surfaces are in contact with each other.