Vibration isolating mount device

Abstract

An oscillation limiting mechanism () is integrally provided to an engine mount () (a vibration proof mount device) of a power plant (P) mounted on an automobile in a traverse mount fashion. Not only is a stopper metal member () in the shape of an inverted U letter disposed so as to cross over a mount body portion (), but a stopper rubber () is formed so that it protrudes from the rear end of a casing of the mount body portion () toward the rear side of the vehicle body. Not only is a hollow portion () formed in the interior of the stopper rubber (), but a metal core body () is also embedded in the stopper rubber () so as to be revolvable around an axis in the vehicle body traverse direction as if it were a link. With such a construction adopted, the stopper rubber () is shear-deformed in the vertical direction with comparative ease even in a state where it is brought into contact with the rear side leg portion () of a stopper metal member () and thereby receives a compressive force in the vehicle body longitudinal direction, and a dynamic spring constant of the mount () in the vertical direction does not rise so much even if the stopper acts in rapid acceleration or the like; therefore, enabling increase in surrounding sound in acceleration to be suppressed with a simple structure less of cost up while oscillation of the power plant (P) is limited in a similar way to that of a torque rod.