| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation balance adjusting structure in a pulley, capable of shortening cycle time related to rotation balance adjustment, and capable of reducing the weight of a component.SOLUTION: In a structure for adjusting rotation balance of a pulley by attaching a balance adjusting mass on a part of a circumference of a circular pulley, a mass attachment small hole is provided on a part of a circumference of an axial end surface of the pulley, and the mass is attached to the mass attachment small hole. The mass integrally includes an attachment part having a relatively small diameter and press fitted or inserted in the mass attachment small hole, and a mass body having a relatively large diameter and arranged outside a mass attachment groove. Two masses are used, and the two masses are arranged symmetrically while having a pulley diameter line passing through a weight position in rotational unbalance as a center line. |
