| 摘要 |
PROBLEM TO BE SOLVED: To provide a worm wheel which includes resin made gear teeth and enables improvement of mechanical strength even when the worm wheel does not necessarily include a fibrous reinforcement material.SOLUTION: A worm wheel engages with a worm gear to transmit power. The worm wheel has resin gear teeth which engage with the worm gear. The gear teeth includes: an engagement part which engages with the worm gear; and an annular part which continues in a circumferential direction on at least one end in a tooth width direction.SELECTED DRAWING: Figure 3 |
