Shock absorber i.e. mono-tube type hydraulic shock absorber, for use in vehicle, has free piston moved to change shortest distance between two portions that are in contact with contraction-side O-ring within contact surfaces, respectively

摘要

#CMT# #/CMT# The shock absorber has a piston (11) partitioning an interior of a bottomed cylinder (10) into an upper chamber (12) and a lower chamber (13). A damping force generation mechanism is installed in a passage. A free piston contact surface or a housing contact surface includes an inclined surface e.g. tapered surface part, inclined to a moving direction of a free piston. The free piston is moved to change a shortest distance between two portions that are in contact with a contraction-side O-ring within the contact surfaces, respectively. #CMT#USE : #/CMT# Shock absorber i.e. mono-tube type hydraulic shock absorber, for use in a vehicle. Can also be used for a double-tube type hydraulic shock absorber and hydraulic shock absorber. #CMT#ADVANTAGE : #/CMT# The shock absorber smoothly changes a damping force characteristic in response to a vibrating state. The free piston moves toward an axial upper chamber, such that the oil flows from the lower chamber into the lower chamber communicating chamber, and a flow rate of the oil that flows from the lower chamber into the passages and flows through the damping force generation mechanism into the upper chamber is reduced, thus reducing the damping force. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a cross-sectional view of a shock absorber. 10 : Bottomed cylinder 11 : Piston 12 : Upper chamber 13 : Lower chamber 17 : Rod guide 18 : Oil seal.