Patent application number | Description | Published |
20110253004 | RAILCAR PRIMARY SUSPENSION - A railcar primary suspension is configured to couple an axle box to a truck frame by a coupling mechanism. The coupling mechanism includes: a radius arm including a tubular part which has openings at both sides thereof; a shaft inserted into the tubular part and provided with projecting portions formed at both side surfaces of the shaft; a pair of receiving seats including fitting grooves in which the respective projecting portions are fitted; cover members configured to support the respective projecting portions; and fastening members configured to fix the cover members to the respective receiving seats. A portion of each fitting groove and a portion of the corresponding projecting portion, the portions contacting each other, respectively have arc surfaces, and a portion of each projecting portion and a portion of the corresponding cover member, the portions contacting each other, respectively have flat surfaces. | 10-20-2011 |
20120279416 | RAILCAR BOGIE - A railcar bogie includes: a cross beam configured to support a carbody; 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. Each of the bearing accommodating portions includes: a case portion configured to accommodate the bearing; and supporting portions configured to support the plate springs. The plate springs are supported by the supporting portions on a center side of the axle in the front-rear direction. | 11-08-2012 |
20140123870 | RAILCAR BOGIE - A plate spring bogie includes: a cross beam supporting a carbody of a railcar; a pair of front and rear axles sandwiching and respectively arranged in front of and behind the cross beam in a railcar longitudinal direction to extend in a railcar width direction; bearings respectively provided at both railcar width direction sides of each of the axles and rotatably supporting the axles; axle boxes respectively accommodating the bearings; plate springs extending in the railcar longitudinal direction to respectively support both railcar width direction end portions of the cross beam and each including both railcar longitudinal direction end portions respectively supported by the axle boxes; and an auxiliary supporting mechanism supporting the railcar width direction end portion of the cross beam in a case where the railcar width direction end portion of the cross beam is displaced downward beyond a predetermined elastic deformation range of the plate spring. | 05-08-2014 |
20140137765 | RAILCAR BOGIE - A railcar bogie includes: a cross beam supporting a carbody; a pair of front and rear axles sandwiching and arranged in front of and behind the cross beam in a railcar longitudinal direction to extend in a railcar width direction; bearings provided at both railcar width direction sides of each and rotatably supporting the axles; axle boxes accommodating the bearings; side members extending in the railcar longitudinal direction supporting both railcar width direction end portions of the cross beam and each including both railcar longitudinal direction end portions supported by the axle boxes; contact members provided at both railcar width direction end portions and disposed on railcar longitudinal direction middle portions of the side members so as not to be fixed to the side members in an upper-lower direction; and supporting members provided at the axle boxes and supporting the railcar longitudinal direction end portions of the side members. | 05-22-2014 |
20140144347 | RAILCAR BOGIE - A plate spring bogie includes: a cross beam supporting a carbody of a railcar; a pair of front and rear axles sandwiching and respectively arranged in front of and behind the cross beam in a railcar longitudinal direction to extend in a railcar width direction; bearings respectively provided at both railcar width direction sides of each of the axles and rotatably supporting the axles; axle boxes respectively accommodating the bearings; plate springs extending in the railcar longitudinal direction to respectively support both railcar width direction end portions of the cross beam and each including both railcar longitudinal direction end portions respectively supported by the axle boxes; and an auxiliary supporting mechanism supporting the railcar width direction end portion of the cross beam in a case where the railcar width direction end portion of the cross beam is displaced downward beyond a predetermined elastic deformation range of the plate spring. | 05-29-2014 |
20150020708 | RAILCAR BOGIE - A railcar bogie includes: a cross beam configured to support a carbody of a railcar; a pair of front and rear axles between which the cross beam is located and which are respectively arranged in front of and behind the cross beam in a railcar longitudinal direction so as to extend in a railcar width direction; bearings respectively provided at both railcar width direction sides of the axles and configured to rotatably support the axles; axle box main bodies configured to respectively accommodate the bearings; plate springs extending in the railcar longitudinal direction to respectively support both railcar width direction end portions of the cross beam, both longitudinal direction end portions of the plate springs being respectively arranged above the axle box main bodies to be respectively supported by the axle box main bodies. | 01-22-2015 |
20150047529 | RAILCAR BOGIE AND RAILCAR INCLUDING SAME - A railcar bogie includes: a cross beam to support a carbody of a railcar; wheels at both railcar width direction sides of the bogie lined up longitudinally at each side; a pair of front and rear axles respectively at a front side and rear side in the railcar longitudinal direction to sandwich the cross beam each of the axles connect wheels located at the left side and right side of the railcar; bearings at both railcar width direction sides of each axle to rotatably support the axle; axle box portions coupled to the cross beam via elastic members to store the bearing; and plate spring portions to respectively support both railcar width direction end portions of the cross beam and both railcar longitudinal direction end portions of the plate spring portions, supported by the axle box portions. The axle box portions include a surface that supports the plate spring portion. | 02-19-2015 |
20150083019 | RAILCAR BOGIE - A railcar bogie includes: a cross beam configured to support a carbody of a railcar; a pair of front and rear axles between which the cross beam is located and which are respectively arranged in front of and behind the cross beam in a railcar longitudinal direction so as to extend in a railcar width direction; bearings respectively provided at both railcar width direction sides of the axles and configured to rotatably support the axles; axle box main bodies configured to respectively accommodate the bearings; plate springs extending in the railcar longitudinal direction to respectively support both railcar width direction end portions of the cross beam, both longitudinal direction end portions of the plate springs being respectively arranged above the axle box main bodies to be respectively supported by the axle box main bodies. | 03-26-2015 |