Patent ID: 9194455
Filing Date: 2015-11-24
Classification: F16F

Abstract:
1. A shock absorber comprising: a cylinder in which a working fluid is sealed; a piston slidably inserted into the cylinder and configured to partition the inside of the cylinder into two chambers; a piston rod connected to the piston and extending toward the outside of the cylinder; a passage through which the working fluid flows by sliding movement of the piston; and a damping force-generating mechanism installed at a portion of the passage and configured to control a flow of the working fluid to generate a damping force, wherein the damping force-generating mechanism comprises: a valve main body through which the passage passes; an annular outer seat protruding from the valve main body; an inner seat protruding inward of the outer seat of the valve main body; an intermediate seat disposed between the outer seat and the inner seat of the valve main body and protruding to surround an opening section of the passage, wherein heights of the intermediate seat and the outer seat in a protrusion direction are larger than that of the inner seat, and wherein a gradient of a line connecting a seat surface of the inner seat and a seat surface of the intermediate seat is larger than a gradient of a line connecting the seat surface of the intermediate seat and a seat surface of the outer seat; a first disk having a larger diameter than the outer seat and that sits on the intermediate seat; a spring member configured to press the first disk toward the outer seat such that the first disk abuts the outer seat; a second disk stacked on the first disk; and a communication unit configured to bring the passage in communication with a space between the intermediate seat and the outer seat.