公开(公告)号：US12049940B2

公开(公告)日：2024-07-30

申请号：US17434674

申请日：2020-02-28

Applicant: KYB CORPORATION

Inventor： Takumi Hayashiguchi ,  Koichiro Awano ,  Takahisa Mochizuki ,  Sodai Shimauchi

IPC: F16F9/34 ,  F16F9/18 ,  F16F9/32 ,  F16F9/516 ,  B62K25/08 ,  F16F9/06

CPC classification number: F16F9/182 ,  F16F9/3221 ,  F16F9/516 ,  B62K25/08 ,  F16F9/065 ,  F16F2222/12 ,  F16F2228/066 ,  F16F2232/08 ,  F16F2234/02

Abstract: A shock absorber is provided with a cylinder, a piston inserted into the cylinder and demarcating an interior of the cylinder into an extension side chamber and a compression side chamber, a piston rod joined to the piston, a damping passage, provided in the piston rod, that communicates with the extension side chamber and the compression side chamber, and a damping force adjustment valve provided in the damping passage. The damping force adjustment valve includes a damping force adjustment unit and a solenoid that drives the damping force adjustment unit to adjust a flow channel resistance. The piston rod includes a yoke into which the damping force adjustment valve is inserted, and a piston holding member mounted on the yoke. The yoke includes a through-hole opening from a side of the yoke and leading to the interior, and a groove provided on a perimeter of the yoke, extending from an anti-piston end, and leading to the through-hole.