公开(公告)号：US11953075B2

公开(公告)日：2024-04-09

申请号：US16978089

申请日：2018-10-16

Applicant: Hitachi Astemo, Ltd.

Inventor： Junpei Kusukawa ,  Michihiro Asanuma ,  Motohiro Hirao ,  Hiroshi Ooka ,  Tatsuro Nambu

IPC: F16F9/53 ,  B60G13/08 ,  B60G17/08 ,  F16F9/18 ,  F16F9/32

CPC classification number: F16F9/532 ,  F16F9/185 ,  B60G13/08 ,  B60G17/08 ,  B60G2202/24 ,  B60G2204/62 ,  B60G2206/41 ,  B60G2206/70 ,  B60G2500/104 ,  B60G2600/182 ,  B60G2600/73 ,  B60G2800/162 ,  F16F9/3235 ,  F16F2222/06 ,  F16F2222/12 ,  F16F2224/02 ,  F16F2224/043 ,  F16F2228/007 ,  F16F2228/066 ,  F16F2230/18 ,  F16F2230/48 ,  F16F2232/08 ,  F16F2234/02

Abstract: A damper device that suppresses arc discharge between electrodes generated by bubbles in an electro-rheological fluid, includes an inner tube housed in an outer tube forming an outer shell of a damper device. An electrode tube is arranged between the outer tube and the inner tube. An electro-rheological fluid is sealed in the outer tube. The inner tube and the electrode tube constitute a cathode and an anode, respectively, and apply a voltage to the electro-rheological fluid located between the inner tube and the electrode tube. An insulating layer is provided on a surface of the electrode tube on a side facing the inner tube or on a surface of the inner tube on a side facing the electrode tube. When a maximum voltage applied to the electro-rheological fluid is Vmax (V), a thickness t (m) of the insulating layer is set to satisfy Formula (1).