| 摘要 |
PURPOSE:To equalize load distribution of each roller row so as to prevent damage at an early stage by minimizing rigidity of a circular part for a roller row where large load is laid or that of the roller on the roller row. CONSTITUTION:A concave groove 14a having a bottom surface at taper angle parallel to the truck surface is formed on the bore diameter surface of a circular part for a roller row 13 of an inner wheel 14, and so is a concave groove 15a on a circular part for a roller row D of an inner wheel 15. Similarly, a concave groove 17 having a bottom surface at taper angle parallel to the truck surface is formed on the major diameter surface of a circular part for a roller row B of an outer wheel 17, and so is a concave groove 18 on a circular part for a roller row D of on outer wheel 18. As the result, rigidity of the circular part for the rows B, D becomes smaller than that for the roller rows A, C, and load of each roller row is equalized. |
