| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibrator which can significantly shorten the operation time and, at the same time, can easily change exciting force while properly maintaining the phase difference angle. SOLUTION: In this vibrator, an unbalanced weight is mounted in each of parallel four shafts of which the left and right shafts constitute a pair. A pair of electric motors rotate and drive the left two shafts and right two shafts in the same direction at the same speed through a differential gear mechanism. An angle phase difference regulation means is provided in the differential gear mechanism to regulate the angle phase difference between the unbalanced weight mounted on the left two shafts and the unbalanced weight mounted on the right two shafts. The left two shafts and the right two shafts are each connected through an exciting force regulation gear mechanism. These exciting force regulation gear mechanisms are rotated through a common regulation means so that, in each of the left and right shafts, one of the two shafts is rotated at the same angle in the same direction relative to the other shaft. COPYRIGHT: (C)2006,JPO&NCIPI
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