| 摘要 |
Provided is a brake disc for a railway vehicle, the brake disc being configured so that aerodynamic sound during high-speed traveling is reduced, cooling performance during braking is improved, and the durability of the brake disc together with fastening bolts is increased. A brake disc (1) for a railway vehicle is provided with: a doughnut-shaped circular plate section (2), the front surface (2a) side of which serves as a slide surface; fin sections (3) which are provided on the back surface (2b) of the circular plate section (2) so as to protrude radially therefrom; and bolt holes (4) penetrating through both the circular plate section (2) and the fin sections (3). The circular plate section (2) is mounted to a wheel by tightening bolts inserted through the bolt holes (4), the mounting of the circular plate section (2) being such that the fin sections (3) are pressed against the plate section (13) of the wheel (10). The fin sections (3) each have formed therein grooves (5a, 5b) extending in the circumferential direction. When the circular plate section (2) is viewed in the radial direction, the grooves (5a, 5b) are located either in a region on the inner peripheral side of the bolt holes (4) and/or in a region on the outer peripheral side of the bolt holes (4). |
