Patent ID: 9611912
Date: 2017-04-04
CPC Classifications: F16F

Claim:
1. A body valve assembly for a shock absorber, comprising: a cylinder divided into an inner cylinder and an outer cylinder such that a reservoir chamber is formed therebetween; a valve body which is installed in a lower end of the inner cylinder and includes at least one compression passage allowing a working fluid to flow from the inner cylinder to the reservoir chamber during a compression stroke and at least one rebound passage allowing the working fluid to flow from the reservoir chamber to the inner cylinder during a rebound stroke; a body retainer which is disposed under the valve body and spaced apart from the valve body and includes at least one compression communication passage so as to be connected to the compression passage; a pilot chamber which is formed to have a recessed space on a top surface of the body retainer and communicates with a lower end of the compression passage and an upper end of the compression communication passage; a pilot valve which is disposed between the valve body and the body retainer, the pilot valve being simultaneously opened to communicate the lower end of the compression passage with the reservoir chamber when the working fluid moves to the pilot chamber during a low-speed compression stroke; and a main valve module which is closed in a state of coming into close contact with a bottom surface of the body retainer during the low-speed compression stroke, and is opened when a pressure of the pilot chamber is above a set pressure range during a high-speed compression stroke, so that the compression communication passage communicates with the reservoir chamber, wherein the valve body includes: a body which is installed in an inner lower end of the inner cylinder and has the compression passage formed circumferentially in a ring shape and the rebound passage formed circumferentially in a ring shape around the compression passaged and spaced apart from the compression passage; and a connection passage which is cut along a lower edge of the body in a horizontal direction at a lower end of the rebound passage to allow communication between the lower end of the compression passage and the reservoir chamber, which is formed between the inner cylinder and the outer cylinder, via the rebound passage when the pilot valve is opened, and wherein an inner periphery of the connection passage communicates the lower end of the compression passage with the reservoir chamber by the opening of the pilot valve during a compression stroke, and communicates the reservoir chamber with a lower end of the rebound stroke during a rebound stroke.