| 摘要 |
PROBLEM TO BE SOLVED: To provide a worm wheel having a simple and easy-to-machine shape for cost reduction, and to provide its manufacturing method. SOLUTION: The worm wheel 20 comprises first-third metal disc wheel bodies 1-3 divided as three parts in a tooth cross direction and layered in one unit. The first-third wheel bodies 1-3 have the same tooth forms 1a-3a at the outer peripheral edges, respectively, for meshing with a worm 10. COPYRIGHT: (C)2006,JPO&NCIPI
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