| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor for an oil pump that is capable of reducing noise, in the rotor for the oil pump.SOLUTION: A rotor for an oil pump comprises an inner rotor 1 configured by teeth, each of which has a plurality of ellipses or circles, and an outer rotor 2 that is disposed on the outside of the inner rotor 1 and has one tooth more than the inner rotor 1, wherein, a tooth top Qa and a tooth root Qc of a drive-side half-tooth region A1 extending from the tooth top Qa to the tooth root Qb of the inner rotor 1 and a non-drive-side half-tooth region A2 are each configured by a different ellipse or a circle. A circumferential axis along a circumferential direction of the ellipse or circle configuring the tooth top Qa is longer in the non-drive-side half-tooth region A2 than in the drive-side half-tooth region A1. |
