公开(公告)号：US20240309933A1

公开(公告)日：2024-09-19

申请号：US18121649

申请日：2023-03-15

Applicant: Hitachi Astemo, Ltd.

Inventor： Jordan TRUITT ,  Sean LUNDBERG ,  Yohei KATAYAMA ,  Takashi TSUKAHARA ,  Shivanand SANKARAN

IPC: F16F9/516 ,  F16F9/32 ,  F16F9/348

CPC classification number: F16F9/516 ,  F16F9/3235 ,  F16F9/3481 ,  F16F2232/08

Abstract: This shock absorber includes a tube, a piston rod having one end portion in an axial direction disposed in the tube and the other end portion in the axial direction disposed outside the tube, a piston assembly connected to an intermediate position of the piston rod in the axial direction, dividing an inner chamber into a first chamber on the other end portion side of the piston rod and a second chamber on the one end portion side of the piston rod, and configured to generate a damping force when the piston rod moves, and a damping force increasing mechanism increasing the damping force when the piston assembly moves to the second chamber side. The damping force increasing mechanism includes a first cylinder connected to the one end portion side of the piston rod with respect to the piston assembly, and a partition piston entering inside of the first cylinder.

公开(公告)号：US20240102530A1

公开(公告)日：2024-03-28

申请号：US17954389

申请日：2022-09-28

Applicant: Hitachi Astemo, Ltd.

Inventor： Shivanand SANKARAN ,  Sean LUNDBERG ,  Jordan TRUITT

IPC: F16F9/348 ,  B60G13/08 ,  B60G15/06 ,  F16F9/22 ,  F16F9/49

CPC classification number: F16F9/348 ,  B60G13/08 ,  B60G15/062 ,  F16F9/22 ,  F16F9/49 ,  B60G2202/23 ,  B60G2202/24 ,  B60G2202/31

Abstract: This shock absorber includes a first valve assembly connected to one end of a tube in an axial direction, a piston assembly dividing an inner chamber of the tube into a first chamber and a second chamber, a piston rod extending from the tube through the first chamber with the piston assembly connected to an intermediate position in the axial direction, a cup provided in the second chamber, and a second valve assembly disposed in the second chamber to be connected to the piston rod and configured to enter and exit from the cup. The cup includes a sleeve disposed in the second chamber with a gap between itself and the tube in a radial direction, and a base adapter fixed to the sleeve by press fitting and provided between the sleeve and the first valve assembly.

公开(公告)号：US20240360885A1

公开(公告)日：2024-10-31

申请号：US18139969

申请日：2023-04-27

Applicant: Hitachi Astemo, Ltd.

Inventor： Markus STEEB ,  Shivanand SANKARAN ,  Andrew Feldkamp

IPC: F16F9/348

CPC classification number: F16F9/3484 ,  F16F9/3481 ,  F16F2222/126

Abstract: This shock absorber includes a cylinder having an inner chamber; a cage body partitioning the inner chamber into first and second chambers, and includes a first passage allowing communication between the first and second chambers, a first seat part, a second passage allowing communication between the first and second chambers, and a second seat part. A first valve which is a first valve coming into contact with the first seat part to close the first passage and being separated from the first seat part to open the first passage, and in which a communication hole communicating with the second passage is formed. A second valve comes into contact with the second seat part to close the second passage and is separated from the second seat part to open the second passage. A passage adjusting disc is provided between the first valve and the cage body.