| 摘要 |
PROBLEM TO BE SOLVED: To provide a crank pulley enabling attachment and detachment without preparing a new dedicated tool.SOLUTION: A crank pulley 100 of an internal combustion engine is a rib 105 that rotates around a rotational shaft J, has a predetermined length in a direction of the rotational shaft J, and is formed from an outer edge toward the direction of the rotational shaft J, and the rib has a concave side surface S105 from the outer edge toward the rotational shaft J when viewed from a surface vertical to the rotational shaft J. Consequently, by adjusting the length of the rib 105, the crank pulley of the internal combustion engine enables attachment and detachment without preparing a new dedicated tool.SELECTED DRAWING: Figure 1 |
