BRAKE DISK FOR ROLLING STOCK AND WHEEL FOR ROLLING STOCK WITH BRAKE DISK

摘要

PROBLEM TO BE SOLVED: To realize a structure having excellent durability which causes less damage such as cracking by relieving thermal stress applied to each part when temperature rises by braking. SOLUTION: A plurality of cutouts 10a and 10a are formed at the inner peripheral edge part at equal intervals in the circumferential direction. The shape of these cutouts 10a and 10a as viewed from the axial direction is a combined arc formed by smoothly continuing both end parts of a first arc part 15 forming a circumferential intermediate portion including the top parts of the cutouts to second arc parts 16 and 16 forming both side portions in the circumferential direction. Also, a virtual arc formed by extending the first arc part 15 to the outside of the cutouts 10a and 10a passes mounting holes 3 and 3 for inserting mounting bolts. The ratio r2/r1 of the radius of curvature r2 of the second arc part 16 to the radius of curvature r1 to the first arc part 15 is restricted within the range of 0.42 to 0.47. COPYRIGHT: (C)2005,JPO&NCIPI