LIQUID SEAL MOUNT DEVICE

• Main Authors: KASAI HIROAKI, YAMATE YUUKI
• Format: Patent
• Language: English
• Published: 19.05.1992
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

PURPOSE:To reduce a transmission ratio from a low frequency to a high frequency oscillation area by providing main and sub-chambers wherein liquid is sealed, and an orifice which communicates both the chambers with each other, and also providing a dynamic damper composed of a plurality of elastic springs and a mass in the main chamber. CONSTITUTION:Within a low frequency range between 10 and 20Hz, for example, liquid passes through an orifice 9 communicating a main chamber 7 with a sub-chamber 8 resulting a satisfactory damping characteristic, preventing engine oscillation in a low engine speed range including idling from transmitting to a vehicle body. A characteristic frequency of an oscillation-system dynamic damper composed of an upper coil spring 11, a mass 12 and a lower coil spring 13 is not more than 200Hz. The mass 12 is oscillated in an antiphase of a moving direction of an insulator inner cylinder 1 within a high frequency range between 200 and 500Hz, and the resultant dynamic damper remarkably attenuates the high-frequency oscillations. Attenuation force of a dynamic damper 10 is arbitrarily set by providing a mass orifice 12B.