| 摘要 |
PURPOSE:To make it possible to machine an orifice with a high degree of accuracy and as well to simplify the structure of a hydraulic damper, by forming a flat surface part in an inner cylinder on the side opposite to an orifice forming part to use the flat surface part as a reference surface when the orifice is machined, and as well by using the flat surface part as a flow passage. CONSTITUTION:A flat surface part 13b which is used as a reference surface when an orifice 15 is machined, is formed in an inner cylinder 13 on the side opposite to an orifice forming part 13a. Thereby, the machining of the orifice 15 may be rectilinearly and simply made with a high degree of accuracy. Further, a passage 16e defined in a gap between the flat surface part 13b and an outer cylinder 16 allows oil jetted from the orifice 15 to flow into the rear surface side of a piston 11 through an aligning groove 20a between accumulators 19, 20. |
