Vibration isolating proof device

Abstract

An oscillation limiting mechanismis 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 memberin the shape of an inverted U letter disposed so as to cross over a mount body portionbut a stopper rubberis formed so that it protrudes from the rear end of a casing of the mount body portiontoward the rear side of the vehicle body. Not only is a hollow portionformed in the interior of the stopper rubberbut a metal core bodyis also embedded in the stopper rubberso 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 rubberis shear-deformed in the vertical direction with comparative ease even in a state where it is brought into contact with the rear side leg portionof a stopper metal memberand thereby receives a compressive force in the vehicle body longitudinal direction, and a dynamic spring constant of the mountin 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.