| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel pump having an inner gear stably rotatable.SOLUTION: An inner gear 120 includes insertion holes 127 passing through itself in the axial direction, a first balance groove 121 recessed in the axial end in the axial direction, and a first chamfered part 128 and a second chamfered part 154. A joint member 160 includes leg parts 164 to be inserted into the insertion holes 127, respectively. When a direction in which each leg part 164 is inserted into the insertion hole 127 is defined as a first direction and a direction which is opposite to the first direction is defined as a second direction, out of the axial direction, at least part of the first-direction side end of the leg part 164 is arranged between a first chamfered end face 126 and a first groove end face 151 in view from a direction perpendicular to the axial direction.SELECTED DRAWING: Figure 7 |
