| 摘要 |
A cushion ring 26 enters the inner circumference of a cushion seal 34 near the end of a piston stroke, the cushion seal 34 being free to displace by a certain amount in the axial direction of a piston rod 23 in a cylinder head 28, and exerts a cushion effect by restricting oil flow from an oil chamber 24 in a cylinder tube 21. A spacer 35 is disposed on the inner side of this cushion seal 34 in the axial direction, and is free to displace by the same amount as the cushion seal 34. When the cushion effect is produced, the spacer 35 comes in contact with the cushion seal 34 to interfere with the vibration of the cushion seal 34.
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