Vibro-isolator

Abstract

Abstract PURPOSE:To prevent transmission of engine vibration to a car body by use of an effective manner by using such a vibro-isolator that produces a damping force in a low frequency corresponding to that of engine vibration and, on the other hand, restrains the dynamic magnification under 1.5 time by use of the resonant operation of fluid if vibration has frequency within the specific frequency range higher than said low frequency. CONSTITUTION:A liquid chamber of which a part is made of an elastic material such as rubber 22 or the like functioning as a main vibration suppressing means is divided into an upper liquid chamber 37A, a middle liquid chamber 37B and a lower liquid chamber 37C. The upper liquid chamber 37A and the middle liquid chamber 37B are communicated with each other by a primary restricting passage while the middle liquid chamber 37B and the lower liquid chamber 37C are communicated with each other by a secondary restricting passage. The secondary restricting passage consists of an orifice 64 which has a long axial length and a small sectional area for the purpose of attenuating vibration of low frequency corresponding to that of engine vibration. The primary restricting passage consists of a passage 39 which has a large sectional area for the purpose of suppressing vibration of a high frequency which is approximately 20Hz.

Inventors

• 👤 Harumichi Yamazaki
• 👤 山崎　晴通
• 👤 Takao Ushijima
• 👤 牛島　孝夫

Bibliographic Details