| 摘要 |
An oil pump includes: an inner rotor (12) rotatable with a drive shaft (11) in a unified manner on a drive-rotation axis (X); an outer rotor (13) which has inner teeth (13A) configured to engage with outer teeth (12A) of the inner rotor (12) and is rotatable about a driven axis (Y) eccentric to the drive-rotation axis (X); and an adjustment ring (14) for rotatably supporting the outer rotor (13). A guide means (G) which allows the adjustment ring (14) to rotate about the driven axis (Y), while allowing the driven axis (Y) to revolve about the drive-rotation axis (X), is formed of: first and second arm portions (C1,C2) provided on the adjustment ring (14); and first and second guide faces (S1) with which the first and second arm portions (C1,C2) are brought into slidable contact. |
