The present invention to improve the pump efficiency.
A fluid pump 101 includes a pump housing 110 to form a pump chamber with to accommodate the outer rotor and the inner rotor (pump cover 112), and the suction passage 112a, and the suction groove 113, the. Suction passage 112a is formed in the pump cover 112, a passage for fluid to be sucked into the pump chamber. Suction groove 113 is a groove communicating with the suction passage 112a formed on the inner wall surface of the pump cover 112, a shape extending along the rotation locus of the outer teeth and the inner teeth. The edge E of the portion forming the suction grooves 113 of the pump cover 112, both the chamfered chamfered portion E3, E4, E5 and chamfered corner E1 is not, E2 are provided. Corners E1, E2, when viewed from the rotation axis direction located in the direct inflow area A which overlaps with the suction passage 112a, the chamfered portion E3, E4, E5 is located in the peripheral region B1, B2 other than straight draining A.
.FIELD 2