| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration generating shaft that may be applied readily also as a vibration generating shaft with which an amplitude may be switched, without a problem regarding warping of the vibration generating shaft caused by welding heat.SOLUTION: A vibration generating shaft 1 is a built-in shaft in a roller of a vibration compactor, and includes: a pair of pivot shaft parts 2, 3 pivotally supported on a roller 21 with bearings 38, 39 in between, the pivot shaft parts being rotated around a shaft center; and a fixed eccentric part 4 formed between the pair of pivot shaft parts 2, 3, having an eccentric shaft center parallel to the shaft center of the pivot shaft parts, and having a circular cross-section that contains an entire area of formation of the pivot shaft parts 2, 3 when seen in the shaft direction. A movable eccentric member 6 is fitted on the fixed eccentric part 4, the movable eccentric member having an eccentric mass relative to the shaft center at the time when the vibration generating shaft 1 rotates in one direction different from an eccentric mass relative to the shaft center at the time when the vibration generating shaft 1 rotates in the other direction.SELECTED DRAWING: Figure 1 |
