Kawasaki Jukogyo Kabushiki Kaisha

Takeyoshi Kusunoki

Shunichi Nakao

Takehiro Nishimura

Yasufumi Okumura

A steering bogie for a railcar includes: a bogie frame supporting a carbody of the railcar; a wheelset including an axle and wheels, the axle extending in a car width direction, the wheels being provided at both respective sides of the axle; and a steering device that presses a pressing target member to steer the wheelset with respect to the bogie frame, the pressing target member being constituted by the wheelset or a member configured to be displaced integrally with the wheelset in a steering direction, the steering device including at least one steering unit, the at least one steering unit including a pressing member that separably contacts the pressing target member to press the pressing target member, and a power mechanism causes the pressing member to contact and separate from the pressing target member.

Steering bogie for railcar

A bogie includes: a plate spring extending in a car longitudinal direction in a state where a first end portion of the plate spring is supported by the first axle box, and a second end portion of the plate spring is supported by the second axle box, the plate spring supporting the pressing member from below so as to be displaceable relative to the pressing member; a first upper link connected to the cross beam and the first axle box and including a first end portion elastically coupled to the first axle box; a first lower link connected to the cross beam and the first axle box and including a first end portion elastically coupled to the first axle box; a second upper link connected to the cross beam and the second axle box and including a first end portion elastically coupled to the second axle box; and a second lower link connected to the cross beam and the second axle box and including a first end portion elastically coupled to the second axle box, a coupling point where the first end portion of the first upper link and the first axle box are coupled to each other and a coupling point where the first end portion of the first lower link and the first axle box are coupled to each other being arranged on a first virtual straight line passing through a center of the first axle in a side view, a coupling point where the first end portion of the second upper link and the second axle box are coupled to each other and a coupling point where the first end portion of the second lower link and the second axle box are coupled to each other being arranged on a second virtual straight line passing through a center of the second axle in the side view.

Bogie for railcar

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.

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.

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.

Growing community of inventors

Akashi, Japan

Takeyoshi Kusunoki