US 11,953,075 B2 · Damper device

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).

Claims11

Dependent claims

A damper device comprising:

a piston rod;
an outer tube housing the piston rod;
an electro-rheological fluid provided between the outer tube and the piston rod;
and
a voltage applying mechanism that is provided between the outer tube and the piston rod and applies a voltage to the electro-rheological fluid,
wherein
the voltage applying mechanism includes an anode and a cathode,
the electro-rheological fluid is located between the anode and the cathode,
an insulating layer is provided on a surface of the anode on a side facing the cathode or on a surface of the cathode on a side facing the anode, and
a thickness t (m) of the insulating layer satisfies following Formula (1) when a maximum voltage applied to the electro-rheological fluid is Vmax (V),
t≥2.5×10−8×Vmax Formula (1)

8 more elements

Dependencies are inferred from the claim text.

Damper device

Life of this patent

Damper device

Life of this patent

Abstract

Claims11