Patent ID: 8573930

Claim:
A nozzle assembly of a variable geometry turbocharger, comprising: a nozzle ring where a plurality of vanes are rotatable mounted along a circumferential surface thereof; a control ring arranged coaxially with the nozzle ring and is relatively rotatable with respect to the nozzle ring; a plurality of rollers rotatably mounted to the control ring along a circumferential surface thereof; and a plurality of operation links, one end of which is rotatably coupled to the control ring and the other end of which is fixed to the vanes through the nozzle ring; wherein the one end of the operation link is positioned between adjacent rollers along the circumferential surface of the control ring; wherein the control ring is disposed between the nozzle ring and a flat wall of a turbo housing with a predetermined gap from the nozzle ring; wherein the control ring has roller shaft protrusions integrally protruding in a predetermined distance and the rollers are formed in a hollow cylindrical shape to be fitted on the roller shaft protrusions; wherein the rollers are rotatably arranged between the control ring and the nozzle ring; wherein the vanes are fixed to one ends of nozzle rotation shafts disposed through the nozzle ring; and wherein the other ends of the operation links are fixed to the other ends of the nozzle rotation shafts between the control ring and the nozzle ring.