公开(公告)号：US20230272835A1

公开(公告)日：2023-08-31

申请号：US18017861

申请日：2021-07-14

Applicant: Hitachi Astemo, Ltd.

Inventor： Takamasa KOTANI ,  Kentaro YAMADA ,  Mikio YAMASHITA

IPC: F16F9/34 ,  F16F9/18 ,  F16F9/348 ,  F16F9/512

CPC classification number: F16F9/341 ,  F16F9/185 ,  F16F9/348 ,  F16F9/512 ,  F16F2222/12 ,  F16F2232/08 ,  F16F2228/066 ,  B60G13/08

Abstract: This shock absorber includes a first damping force generation mechanism provided in a passage of a piston, and a second damping force generation mechanism provided in a piston rod. The second damping force generation mechanism includes a valve seat member, a sub-valve provided in the valve seat member, and a cap member covering one end side of the second damping force generation mechanism and at least a part of an outer circumference of the valve seat member. A communication passage is formed on one end side of the cap member. A biasing member provided so that one end surface side is in contact with an outer circumferential side of the cap member with respect to the communication passage, and a bendable flexible disc provided so that the other end surface side of the biasing member is in contact therewith.

公开(公告)号：US20220275847A1

公开(公告)日：2022-09-01

申请号：US17640857

申请日：2020-09-25

Applicant: Hitachi Astemo, Ltd.

Inventor： Kazuya YAMADA ,  Kentaro YAMADA ,  Reiji NAKAGAWA ,  Hiroyasu SATO ,  Sadatomo MATSUMURA ,  Wataru TAKAGI

IPC: F16F9/32 ,  F16F9/18

Abstract: This shock absorber includes a piston main body and a piston band. The piston main body has, at an outer peripheral portion thereof, a stepped portion including a large-diameter surface portion, a stepped surface portion and a small-diameter surface portion. The piston band has, at an outer peripheral portion thereof, a large diameter portion, a medium diameter portion formed so as to have a smaller diameter than the large diameter portion, and a small diameter portion formed between the large diameter portion and the medium diameter portion so as to have a smaller diameter than the medium diameter portion, in a state before being disposed in a cylinder. At one end on the side close to a tip portion of a piston rod, an inner peripheral surface is inclined toward the piston main body side from the large-diameter surface portion to a small-diameter surface portion of the stepped portion.