| 摘要 |
PROBLEM TO BE SOLVED: To equally thicken a metallic holder fitted inside a synthetic resin gear body, to further reduce a cost, and to fit the holder to the gear body without generating a void and a weld mark. SOLUTION: The holder 82 fitted inside the gear body 81 in a worm wheel 8 has the outside plural recesses 82g, a waveform cylindrical part 83 molded by a press so that an inward projection 82h by the recesses 82g is separately arranged in the peripheral direction, and an installing plate part 84 extended to the radial directional inside from one end of the waveform cylindrical part 83, and is constituted so that the tooth body 81 is fitted outside the waveform cylindrical part 83. |
