RAILCAR BOGIE

摘要

A railcar bogie includes: a cross-beam supporting a carbody; pair of axles at both cross-beam sides in car longitudinal direction and extending in car-width direction; bearings at both car-width direction sides of each axle and rotatably supporting axles; axle-boxes accommodating respective bearings; plate-springs supporting both car-width direction end-portions of the cross-beam and extending in car longitudinal direction, both car longitudinal direction end-portions of each plate-springs supported by axle-boxes; pressing members at both car-width direction end-portions of the cross-beam placed on respective car longitudinal direction middle-portions of plate-springs, lower surface of a portion of each pressing member having a convex downward circular-arc shape in side-view, the portion pressing the plate-spring, a middle-portion upper surface of each plate-spring having convex downward circular-arc shape in side-view, the middle-portion pressed by the pressing member, and a lower surface curvature of the pressing member larger than the upper surface curvature of the middle plate-spring portion.

主权项

1. A railcar bogie comprising:
a cross beam supporting a carbody of a railcar; a pair of axles arranged at both respective sides of the cross beam in a car longitudinal direction and extending in a car width direction; bearings provided at both car width direction sides of each of the axles and rotatably supporting the axles; axle boxes accommodating the respective bearings; plate springs supporting both respective car width direction end portions of the cross beam and extending in the car longitudinal direction, both car longitudinal direction end portions of each of the plate springs being supported by the respective axle boxes; and pressing members located at both respective car width direction end portions of the cross beam and placed on respective car longitudinal direction substantially middle portions of the plate springs, a lower surface of a portion of each of the pressing members having a circular-arc shape that is convex downward in a side view, the portion pressing the plate spring, an upper surface of a portion of each of the plate springs having the circular-arc shape that is convex downward in the side view, the portion being pressed by the pressing member, and a curvature of the lower surface of the pressing member being larger than the curvature of the upper surface of the plate spring.