| 摘要 |
<p>[PROBLEMS] To provide a crankshaft for an automobile engine in which the weight of an arm formed integrally with a balancer is further reduced. [MEANS FOR SOLVING THE PROBLEMS] In this crankshaft for an automobile engine, a hollow shaft-shaped journal (15), a pin (14), and an arm (10) formed integrally with a balancer (11) are individually manufactured. A ring-shaped bearing is assembled in the journal (15) and the pin (14), respectively. When the journal (15) is positioned just above the pin (14), the balancer integral to the arm is formed in a sector shape having a circular arc around the axial center of the journal (15) and the base end near the horizontal centerline of the journal (15). The outer edge part (11a) of the balancer is thickened, and the part thereof nearer to the journal (15) is thinned to form a recess (11b).The lower end of the arm (10) is inscribed with the circle formed by the circular arc.</p> |
