公开(公告)号：US20240426364A1

公开(公告)日：2024-12-26

申请号：US18689888

申请日：2022-09-16

Applicant: HITACHI ASTEMO, LTD.

Inventor： Rinnosuke ODA ,  Hiroaki TACHIBANA ,  Shingo MIYAKE ,  Sadatomo MATSUMURA ,  Ryo SHINATA

IPC: F16F9/58

Abstract: A cylinder device includes a piston rod having one end side connected to a piston and the other end side inserted through a blocking member, and extending to the outside of a cylinder, and a cushion member provided between the piston and the blocking member and abutting the blocking member through extension of the piston rod. The cushion member has a first member, and a second member provided inside the first member in a radial direction, abutting the blocking member earlier than the first member and having a hardness smaller than that of the first member, and the first member and the second member apply a force to the blocking member in parallel.

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.

公开(公告)号：US20240025220A1

公开(公告)日：2024-01-25

申请号：US18023943

申请日：2021-08-30

Applicant: Hitachi Astemo, Ltd.

Inventor： Sadatomo MATSUMURA ,  Koichi YAMAKA ,  Naoya TOKOO ,  Yoshihiro YAMAGUCHI

IPC: B60G3/06 ,  B60G13/06 ,  B60G15/06

CPC classification number: B60G3/06 ,  B60G13/06 ,  B60G15/063 ,  B60G2200/142

Abstract: This shock absorber is disposed between a vehicle body and an axle. The shock absorber includes a bottomed cylindrical cylinder, a spring seat, and a mold release rib. The spring seat is formed integrally with the cylinder. The spring seat protrudes in a radial direction of the cylinder from the cylinder to support a suspension spring. The mold release rib is formed integrally with the cylinder and the spring seat. The mold release rib connects an outer circumferential portion of the spring seat and the cylinder. The mold release rib has a face part provided at an outer end portion of the cylinder in the radial direction.

公开(公告)号：US20230322035A1

公开(公告)日：2023-10-12

申请号：US18023826

申请日：2021-08-19

Applicant: Hitachi Astemo, Ltd.

Inventor： Yoshihiro YAMAGUCHI ,  Sadatomo MATSUMURA ,  Koichi YAMAKA ,  Naoya TOKOO

IPC: B60G13/08

CPC classification number: B60G13/08 ,  B60G2202/24 ,  B60G2204/129 ,  B60G2206/41 ,  B60G2800/162

Abstract: This shock absorber includes an outer cylinder, and a bracket having a pair of extension parts. The outer cylinder has an opening and into which the inner cylinder is inserted and fixed. The pair of extension parts extend outward in a radial direction of the outer cylinder from different positions spaced apart in a circumferential direction of the outer cylinder. A hole portion and a reduced-rigidity part are provided in the pair of extension parts. The hole portion is provided at a position facing an attachment hole of an attachment member disposed between the pair of extension parts. The reduced-rigidity part is disposed at a disposition position on the outer cylinder side of the hole portion at the same position as the hole portion in the axial direction of the outer cylinder. The reduced-rigidity part has a lower rigidity than a position different from the disposition position.