Conical Axle Spring of Bogie for Railroad Car_

摘要

The present invention relates to a conical axle spring of a railway vehicle bogie, comprising a hollow shaft, a plurality of rubber layers 12 radially overlapped in a corrugated shape attached along the outer periphery of the shaft, A conical axle spring having a metallic ring 13 formed between the rubber layers 12 and a cylindrical outer cylindrical portion 14 formed of metal to surround the outer circumferential surface of the outermost rubber layer 12 of the rubber layer 12. In each of the rubber layers 12, the narrow and long holes 12a are formed in the circumferential direction of the rubber layers 12, and the holes 12a formed in the respective rubber layers 12 are formed in the front and rear directions of the trolley. Arranged along, each ring 13 is formed with a stopper 13a protruding from its outer circumference to coincide with the arrangement direction of the holes, and the shaft 11 has a conical shape that rapidly decreases in diameter as it goes upward. In this way, the front and rear stiffness of the axle spring is lowered, thereby improving the curve followability without reducing the linear runningability and reducing the lateral pressure and flange wear.