SHOCK ABSORBER

摘要

A shock absorber includes a cylinder, a piston, a piston rod, an expansion-side passage that allows a fluid to flow only from an expansion-side chamber toward a contraction-side chamber, a contraction-side passage that allows the fluid to flow only from the contraction-side chamber toward the expansion-side chamber, an expansion-side damping valve that applies resistance to a flow of fluid passing through the expansion-side passage, a contraction-side damping valve that applies resistance to a flow of fluid passing through the contraction-side passage, an expansion-side bypass passage that connects the expansion-side chamber to the contraction-side chamber, an expansion-side relief valve that is opened by pressure in the expansion-side chamber so as to open the expansion-side bypass passage, a contraction-side bypass passage that connects the expansion-side chamber to the contraction-side chamber, and a contraction-side relief valve that is opened by pressure in the contraction-side chamber so as to open the contraction-side bypass passage.

主权项

1. A shock absorber comprising:
a cylinder; a piston that is inserted into the cylinder slidably and divides an interior of the cylinder into an expansion-side chamber and a contraction-side chamber; a piston rod that is inserted into the cylinder movably and connected to the piston; an expansion-side passage that allows a fluid to flow only from the expansion-side chamber toward the contraction-side chamber; a contraction-side passage that allows the fluid to flow only from the contraction-side chamber toward the expansion-side chamber; an expansion-side damping valve that applies resistance to a flow of fluid passing through the expansion-side passage; a contraction-side damping valve that applies resistance to a flow of fluid passing through the contraction-side passage; an expansion-side bypass passage that connects the expansion-side chamber to the contraction-side chamber while bypassing the expansion-side passage; an expansion-side relief valve that is provided midway in the expansion-side bypass passage, and is opened by pressure in the expansion-side chamber so as to open the expansion-side bypass passage; a contraction-side bypass passage that connects the expansion-side chamber to the contraction-side chamber while bypassing the contraction-side passage; and a contraction-side relief valve that is provided midway in the contraction-side bypass passage, and is opened by pressure in the contraction-side chamber so as to open the contraction-side bypass passage.