| 摘要 |
PROBLEM TO BE SOLVED: To provide a worm wheel for an electric power steering device which forms a proper cavity part in an annular member without disposing a core in a die of an injection molding machine, and to provide a manufacturing method of the worm wheel for the electric power steering device.SOLUTION: A worm wheel 1 for an electric power steering device includes a synthetic resin made annular member 12 in which teeth are installed over a circumferential direction of an outer edge part; and a metal core member 13 fixed to the inner edge side of the annular member 12. The annular member 12 has a thick part 16a having a radial dimension larger than that of the other portion.SELECTED DRAWING: Figure 1 |
