| 摘要 |
The invention concerns 3-piece rail bogies of the type which have a transverse bolster (10) and a pair of side frames (12) on which the bolster is suspended at its ends on upright bolster springs (22) acting between the bolster and the side frames. The invention proposes that the bolster ends be formed with downwardly opening concavities (14, 16, 18, 20) to receive the upper ends of the bolster springs. With this feature it is possible to accommodate longer bolster springs than normal, giving an improved ride quality in both the vertical and lateral sense. Alternatively, resilient shear pads can be located beneath shorter bolster springs to take account of allowable variations in rail vehicle coupler heights. |
