Damping force generating mechanism for hydraulic shock absorber

F - Mech Eng,Light,Heat,Weapons – 16 – F

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F16F 9/34 (2006.01)

Patent

CA 2621518

A damping force generating mechanism of a hydraulic shock absorber having a piston (8) fixed to the tip of a piston rod (1) in a cylinder (15). A port (7) for flowing a hydraulic oil from an oil chamber (R) to an oil chamber (P) according to the extending operation of the piston rod (1) are formed longitudinally across the piston (8). To provide a resistance to the hydraulic oil flowing out from the ports (7), a damping force generating valve (9) for generating a damping force during the extension is installed on the oil chamber (P) side of the piston (8). A restriction member (14) keeps constant a distance between a nut (13) threaded with the piston rod (1) passed through the piston (8) and the piston (8). The easiness of the assembling and the degree of freedom of the design of the damping force generating mechanism can be secured by disposing the restriction member (14) during its extension on the outside of the damping force generating valve (9).

La présente invention vise un mécanisme générateur de force d~amortissement dans un amortisseur hydraulique ayant un piston (8) fixé au sommet d~une tige de piston (1) dans un cylindre (15). Des orifices (7) faisant passer une huile hydraulique d~une chambre d~huile (R) à une chambre d~huile (P) suivant l~action de développement de la tige de piston (1) sont formés longitudinalement en travers du piston (8). Pour offrir une résistance à l~huile hydraulique sortant des orifices (7), une soupape génératrice de force d~amortissement (9) destinée à générer une force d~amortissement pendant le développement est installée sur le côté chambre d~huile (P) du piston (8). Un organe de restriction (14) maintient une distance à un niveau constant entre le piston (8) et un écrou (13) fileté avec la tige de piston (1) traversant le piston (8). La facilité d~assemblage et le degré de liberté pour concevoir le mécanisme générateur de force d~amortissement peuvent être garantis en disposant l~organe de restriction (14) pendant son développement sur l~extérieur de la soupape génératrice de force d~amortissement (9).

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