Patent ID: 9688292
Date: 2017-06-27
CPC Classifications: B61F

Claim:
1. A bogie supporting a carbody of a railcar, the bogie comprising: a bogie frame including a cross beam extending in a car width direction and pressing members provided respectively under car width direction end portions of the cross beam, each of the pressing members having a lower surface formed in a downward convex shape in a side view, the bogie frame being rotatable relative to the carbody in a yawing direction; axles extending in the car width direction; bearings provided at both respective car width direction sides of each of the axles and rotatably supporting the axles; plate springs supporting both respective car width direction end portions of the cross beam from below via respective pressing members and extending in a car longitudinal direction; axle boxes accommodating the respective bearings and supporting both respective longitudinal direction end portions of each of the plate springs from below; and rubbing plates provided on an upper surface of the cross beam to slidingly contact respective rubbed plates provided on a lower surface of a member attached to the carbody, the pressing members not being fixed to the plate springs, a curvature of the lower surface of each of the pressing members being larger than a curvature of an upper surface of a middle portion of each of the plate springs in a state where the bogie is not supporting the carbody, in a plan view, each of the rubbing plates being arranged within a region where the cross beam and the plate spring intersect with each other and being arranged on a center line of the plate spring, the center line extending in the car longitudinal direction, in the side view, each of the rubbing plates being arranged on a center line extending through a center of the pressing member in a vertical direction.