To provide a variable displacement exhaust turbo supercharger including: a means for preventing the abrasion of a connecting pin integrally formed with a lever plate or a base material of a drive ring and the abrasion of a groove for the engagement of the connecting pin; and a means for preventing the projection of the drive ring from a nozzle mount toward a lever plate side to eliminate the probability of outbreaks of an operation failure of a variable nozzle mechanism.
In the variable displacement exhaust turbo supercharger including a variable nozzle mechanism 100, a drive ring 3 is arranged between a side surface of a lever plate 1 and a side surface of a nozzle mount 5 in parallel with the lever plate 1 and the nozzle mount 5 in the axial direction, and a part structured able to abut on an outside surface of the drive ring 3 to hinder the axial movement of the drive ring 3 is provided in a side of the nozzle mount, and a part for hindering the movement of the drive ring in the axial direction is an annular groove 3y formed at the side of the nozzle mount along the circumferential direction, and is structured to hinder the axial movement of the drive ring from a side surface of the groove by fitting the drive ring 3 in the groove 3y.
COPYRIGHT: (C)2010,JPO&INPIT
Seiichi Ibaraki
Jinnai Yasuaki
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