DAMPING BUSHING Russian patent published in 2020 - IPC F16F13/14 

FIELD: vibration damping means.

SUBSTANCE: damping bushing includes cartridge (3), which surrounds element (2). Elastomer body (4) defines first chamber (40) and is radially located between element (2) and sleeve (3). Incompressible fluid medium is movable between first chamber (40) and expansion chamber by means of fluid connection means. Radial movement of sleeve (3) relative to element (2) provides alternate pumping of fluid medium from first chamber (40) to expansion chamber and return of fluid medium due to rarefaction. Expansion chamber is confined by flexible expansion membrane and located outside elastomer body (4). Membrane can expand and contract across load transfer radial direction between element (2) and sleeve (3). Inside sleeve (3) there is hollow space (43), in which there is no fluid medium.

EFFECT: creation of bushing, having low static rigidity and high dynamic stiffness starting from specific frequency.

8 cl, 6 dwg