Patent ID: 8656839

Claim:
A railcar bogie comprising: a cross beam configured to support a carbody of a railcar; a pair of front and rear axles respectively provided on front and rear sides of the cross beam so as to extend along a crosswise direction; bearings respectively provided on both crosswise-direction sides of each of the axles and configured to rotatably support the axles; bearing accommodating portions configured to respectively accommodate the bearings; and plate springs extending in a front-rear direction so as to be respectively supported by both crosswise-direction end portions of the cross beam, end portions of each of the plate springs being respectively supported by the bearing accommodating portions, wherein: the plate springs include a middle plate spring, an upper plate spring provided above and spaced apart from the middle plate spring, and a lower plate spring provided under and spaced apart from the middle plate spring; supporting portions include a middle supporting portion, an upper supporting portion, and a lower supporting portion; each of the bearing accommodating portions includes a case portion configured to accommodate the bearing, the middle supporting portion configured to support the middle plate spring, the upper supporting portion configured to support the upper plate spring, and the lower supporting portion configured to support the lower plate spring; each of the upper plate spring and the lower plate spring includes at least a coupling plate spring; the middle plate spring consists of one or more non-coupling plate springs; each of both end portions of the coupling plate spring of the upper plate spring is coupled to and supported by the upper supporting portion so as to be rotatable around a rotating axis extending in the crosswise direction; each of both end portions of the coupling plate spring of the lower plate spring is coupled to and supported by the lower supporting portion so as to be rotatable around a rotating axis extending in the crosswire direction; and each of both end portions of the one or more non-coupling plate springs of the middle plate spring is supported by the middle supporting portion so as to be movable in the front-rear direction.