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：US20240102528A1

公开(公告)日：2024-03-28

申请号：US17954390

申请日：2022-09-28

Applicant: Hitachi Astemo, Ltd.

Inventor： Joel DONAHUE ,  Jordan TRUITT ,  Takeru YOKOTA ,  Koji MINAMINO

IPC: F16F9/18 ,  F16F9/32 ,  F16F9/348 ,  F16F9/36

CPC classification number: F16F9/185 ,  F16F9/3214 ,  F16F9/3271 ,  F16F9/348 ,  F16F9/368 ,  B60G13/08 ,  F16F2222/12 ,  F16F2226/04 ,  F16F2232/08 ,  F16F2234/02

Abstract: In this shock absorber, a piston includes a first piston body, a second piston body, and a piston band. The first piston body includes a first passage, a second passage, a first seat, and a second seat. The first seat communicates with the first passage and on which a first damping valve is placed. A second damping valve is placed on the second seat. The second piston body includes a third passage, a fourth passage, a third seat, and a fourth seat. The third seat communicates with the fourth passage and on which a third damping valve is placed. A fourth damping valve is placed on the fourth seat.