Damping Force Generating Mechanism for Hydraulic Shock Absorber

摘要

A hydraulic shock absorber comprises a piston 8 fixed to a tip end of a piston rod 1 within a cylinder 15. A port 7 that causes working oil to flow from an oil chamber R into an oil chamber P in accordance with an expansion operation of the piston rod 1 is formed through the piston 8. An expansion damping force generating valve 9 is provided on the oil chamber P side of the piston 8 to apply resistance to the outflow of working oil through the port 7. A defining member 14 keeps the distance between the piston 8 and a nut 13 that is screwed to the piston rod 1 penetrating the piston 8 constant. By disposing the defining member 14 on the outer side of the expansion damping force generating valve 9, ease of assembly and design freedom are ensured in the damping force generating mechanism.