| 摘要 |
PROBLEM TO BE SOLVED: To provide a double helical gear capable of controlling a phase without using a special device. SOLUTION: In this double helical gear formed by combining two helical gears, 1, 2 having the same gear specification excluding their torsion directions, two helical gears 1, 2 are engaged with each other by changing their combination. In this method of manufacturing the double helical gear, the combination of two helical gears is changed to form the pair of helical gears engaged with each other. COPYRIGHT: (C)2006,JPO&NCIPI
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