| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibratory roller which can prevent the harmful effect to a rolling object surface at the time of a vibration-excitation shaft rotation stop with a simple structure by shortening the time of occurrence of a resonance phenomenon.SOLUTION: A vibratory roller comprises: a roll; a hydraulic circuit which connects a hydraulic pump 12 and a hydraulic motor 14; a switching valve 13 which is switched between a vibration generation position of making the hydraulic pump 12 communicate to the hydraulic motor 14 and making the hydraulic motor 14 communicate to a hydraulic oil tank 11, and a neutral position of blocking supply of the hydraulic oil to the hydraulic motor 14 and directly returning the hydraulic oil from the hydraulic pump 12 to the hydraulic oil tank 11; and a circulation circuit J1 which is communicated when the pressure on a discharge port side of the hydraulic motor 14 is equal to or greater than the prescribed pressure at the time when the switching valve 13 is switched from the vibration generation position to the neutral position, and flows the hydraulic oil discharged from the discharge port of the hydraulic motor 14 to a suction port of the hydraulic motor 14.SELECTED DRAWING: Figure 5 |
