Damper suppressing torsional vibration

Abstract

Abstract PURPOSE:To provide a damper which employs a viscous fluid of high viscosity and at the same time offers a low elastic modulus by so constituting that a rubber member is attached to at least either one of an inertial mass body or a casing to oppose the other so that the rubber member and the viscous fluid are intervening in series between the inertial mass body and the casing. CONSTITUTION:An annular rubber member 6 is adhered concentrically to the internal surface of an annular inertial mass body 4. A small clearance 7 is provided between the internal surface of this annular rubber member 6 and the surface 2A of the casing side which is opposed thereto so that the viscous fluid 5 of high viscosity such as silicon oil is intervening just like in the clearance on the side where the inertial mass body 4 and the internal surface of the casing 2 are directly opposed. The elastic element Fb of the viscous fluid 5 and the rubber member 6 are intervening in series between the casing 2 and the inertial mass body 4, and thus, even when the viscosity of the viscous fluid 5 is high, the elastic modulus as a damper can be made small. Therefore, a damper suitable for installation on an internal combustion engine can be obtained.

Inventors

• 👤 Shoichi Iwamoto
• 👤 昭一 岩本

Bibliographic Details