| 摘要 |
PROBLEM TO BE SOLVED: To shorten axial length in a shock absorber whose damping force can be regulated. SOLUTION: A piston 5 connected to a piston rod 6 is fitted slidably in a cylinder 2 having a hydraulic oil sealed therein. The damping force is generated to the sliding of the piston 5 by extension-side and compression-side damping force generating mechanisms 13, 14 in extension-side and compression-side passages 11, 12. A damping force generation mechanism 19 is provided in bypass passage 21, which bypasses the extension-side and compression-side damping force generating mechanisms 13, 14. In the damping force generation mechanism 19, a flow passage area of the bypass passage 21 is changed to regulate the damping force by causing a pressure difference between upper and lower chambers 2A, 2B of the cylinder to bend a convex spring 25 for opening or closing a communication passage 21A. The use of the convex spring 25 enables the axial length of the damping force generation mechanism 19 to be shortened. COPYRIGHT: (C)2011,JPO&INPIT |
