| 摘要 |
PURPOSE:To obtain desired oil pressure resistance characteristic in a cylinder device for a hydraulic buffer, by fixing a piston at one end of the piston rod movably in predetermined range while making the oil flow passing through the conducting path in the piston variable. CONSTITUTION:A small diameter section 21A is formed at the inner end of a piston rod 21 projecting through a rod guide 3 and a seal member 4 into a cylinder 1 then a piston 22 is fitted to said section 21A movably in the axial direction. Said range is limited by a limiting section consisting of a rising step 21B and a stopper 23. A path 24 conducting between the oil chambers B, C is formed on the piston 22 while an orifice 25 conducting between the path 24 and the oil chamber B is formed. A belleville spring 26 opening to the stopper 23 side is placed between the piston 22 and the stopper 23, to deform in accordance with the external force functioning onto the piston rod 21 thus to vary the oil pressure resistance. |
