| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil pump mounted on an engine and the like of a vehicle, capable of adjusting a discharge rate with smooth adjustment motion, and having excellent pumping efficiency.SOLUTION: An oil pump is composed of an inner rotor 3, an outer rotor 4 rotated with prescribed eccentricity to the center of rotation, an outer ring 5 for oscillating the outer rotor 4 according to fan-shaped rotation locus, operating means for oscillating and operating the outer ring 5, and a pump hosing A having a rotor chamber 1 accommodating the inner rotor 3, the outer rotor 4 and the outer ring 5. Three to eight tooth-shaped portions 6 composed of outer position tooth shapes 6b formed on the rotor chamber 1 and inner position tooth shapes 6a formed on the outer ring 5, paired with the outer position tooth shapes 6b and moved while constantly engaged with the outer position tooth shapes, are disposed, and a prescribed interval is formed between the adjacent tooth-shaped portions 6. |
