Patent ID: 8480356

Claim:
An adjustment mechanism incorporated in an exhaust guide assembly of a VGS type turbocharger, wherein a plurality of adjustable blades disposed at the outside of an outer circumference of an exhaust turbine wheel are rotated; and a relatively small amount of exhaust gas discharged from an engine is suitably throttled by the adjustable blades to increase the velocity of the exhaust gas, so as to rotate the exhaust turbine wheel using energy of the exhaust gas and to feed more air than natural intake into the engine by a compressor directly connected to the exhaust turbine wheel, thereby enabling the engine to output high power even when the engine is rotating at a low rotational speed, the adjustment mechanism in the VGS type turbocharger being characterized in that: when concurrently rotating the plurality of adjustable blades by said adjustment mechanism, an actuator provided outside is shift-driven to rotate a drive ring to which shaft portions of the adjustable blades are connected, thereby collectively rotating the plurality of adjustable blades; and that the drive ring is formed of a blank material punched out from a metal material having a substantially constant sheet thickness, a blank being cut out such that the blank includes a surplus reinforcing portion in addition to an actual product part of the drive ring, said reinforcing portion being suitably folded back so as to partially increase the thickness of an input portion of the drive ring, where power of the shifting drive is input from the actuator, thereby increasing wear resistance of the input portion.