RUBBER VIBRATION ISOLATOR WITH HYDRAULIC DAMPER Russian patent published in 2011 - IPC F16F13/06 

FIELD: machine building.

SUBSTANCE: vibration isolator consists of case, of flexible element and of hydraulic damper. The case is made in form of two vertical poles. With their one end the poles are rigidly fixed in a lower plate of the case, while with their second end they interact with bushes. One bush rests on a flexible element consisting of a package of successively connected rubber washers and is connected with a vibration isolated object by means of a S-form lever. Another bush is installed in a fixing hole of a base of the vibration isolated object. The hydraulic damper is formed with coaxial cylinder sleeves. A pressure tight circular cavity is formed between the external and internal sleeves. An upper part of the cavity is closed with a movable circular flange with packings along internal and external surfaces, while a lower one is closed with a circular washer. A circular piston with throttling orifices is arranged in the circular cavity. The piston is pivotally connected with the circular flange by means of at least three connecting rods; a spring rests on the circular flange. An upper base of the spring rests against a cover rigidly tied with a rod of the damper. The bush is rigidly connected with a cover and functions as a guiding device for the spring. The rod is installed coaxially to the sleeves. A lower end of the rod is connected with the vibration isolated object, while the upper one - with the cover.

EFFECT: raised efficiency of vibration isolation in resonance mode and simplification of design and assembly.

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