公开(公告)号：US20180017128A1

公开(公告)日：2018-01-18

申请号：US15521137

申请日：2015-04-03

Applicant: Showa Corporation

Inventor： Kunio SHIBASAKI ,  Tetsuya SHIROTANI

IPC: F16F9/36 ,  F16F9/18 ,  F16F9/32 ,  B60G13/08

CPC classification number: F16F9/36 ,  B60G13/08 ,  B60G2300/124 ,  F16F9/18 ,  F16F9/3242 ,  F16F9/3257 ,  F16F9/3278 ,  F16F2230/30

Abstract: A hydraulic buffer device includes a first cylinder that stores oil, a rod member capable of being moved with respect to the first cylinder as being inserted into the first cylinder toward a first side of the first cylinder and being protruded outward from the first cylinder on a second side of the first cylinder, a rod guide that covers the second side of the first cylinder as having a through-hole, an oil seal arranged at the outer side of the rod member in the radial direction on the second side of the first cylinder, a groove portion that forms a flow path for oil flowing from the inside of the first cylinder toward the oil seal, and a small-diameter portion that restricts flow of oil flowing through the groove portion. An appropriate amount of fluid is supplied to a seal member in a pressure buffer device.