Nissan Motor Company Limited

Kinugawa Rubber Ind. Co., Ltd.

Kinugawa Rubber Industrial Co., Ltd.

Norio Yoda

Yoshinari Fujiwara

Hiroshi Aikawa

Toshiyuki Tabata

Toshikazu Tabata

Singo Tanuma

A structure of a vibration-proof rubber bushing with a high loss factor and high durability is disclosed which comprises a) a metallic outer envelope; b) a viscous fluid preferably of a liquid such as silicone oil filled in the outer envelope; c) a first elastic member; and d) a metallic inner envelope fitted into an inner portion of the outer envelope via the first elastic member.

Structure of vibration-proof rubber bushing

A fluid-filled power unit mount device consists of a mount rubber securely interposed between two base plates. A partition plate is securely connected to one of the base plate so as to define fluid and auxiliary chambers on the opposite sides thereof. The partition plate is formed with an orifice to provide fluid communication between the fluid and auxiliary chambers, and provided with two parallely arranged movable mechanisms each having a movable member. The movable member is movable under small amplitude high frequency vibration causing booming noise, but restrained from its movement under large amplitude low frequency vibration, thereby effectively damping even vibration which is slightly higher in frequency than the booming noise generating high frequency vibration.

Fluid-filled power unit mount device

A fluid-containing power unit mounting device capable of effectively damping vibration in a wide range of frequency is shown. The damping function of the device is accomplished by a mounting rubber forming an internal fluid-containing chamber between a power unit and a chassis, a partition plate dividing the chamber and including a plurality of valve mechansims in series and an orifice communicating between both sides of the chamber.

Fluid-containing power unit mounting device

Growing community of inventors

Yotsukaido, Japan

Norio Yoda