| 摘要 |
PROBLEM TO BE SOLVED: To inhibit abnormal noise from being caused by air bubbles contained in a hydraulic oil during initial motion of a hydraulic draft gear.SOLUTION: A hydraulic draft gear comprises: a cylinder; and a piston 26 which slides in the cylinder in a hydraulic oil stored in the cylinder. An air bubble accumulation tool 70, which accumulates air bubbles moving in the hydraulic oil toward the piston 26 before the piston 26, is provided in the hydraulic draft gear. |
