Carbody support device and railway vehicle

1. A carbody support device of a railway vehicle comprising support mechanisms respectively installed between a front bogie and a carbody and between a rear bogie and the carbody in a traveling direction, and supporting the carbody against the respective bogies,

wherein the support mechanisms include:

support members extending in vehicle longitudinal directions of the carbody; and

lever members configured to connect between respective both ends of the support member in the vehicle longitudinal directions and the same ends in width directions of the front and rear bogies, and configured to be pivotable,

wherein the lever members includes:

a front side lever member having a bent shape, one end of the front side lever member provided corresponding to the front bogie and the other end connected with a front end of the support member in the vehicle longitudinal directions, and the front side lever member configured to be pivotable about a fulcrum located between the one end and the other end;

a rear side lever member having a bent shape, one end of the rear side lever member provided corresponding to the rear bogie and the other end connected with a rear end of the support member in the vehicle longitudinal directions, and the rear side lever member configured to be pivotable about a fulcrum located between the one end and the other end; and

elastic members, respectively provided between the one end of the front side lever member and the front bogie, and between the one end of the rear side lever member and the rear bogie, for applying a biasing force from each of the lever members to each of the bogies,

wherein,

in a state that one of the front and rear bogies is inclined with respect to the carbody, a force caused by one of the lever members related to the one of bogies pivoting about the fulcrum acts on the support members, the force makes the other of the lever members related to the other of bogies pivot about the fulcrum, whereby the support mechanisms permit the other of bogies inclining to a different direction with respect to the inclination of the one of bogies in the vehicle width directions; and

in a state that the front and rear bogies are inclined in the same vehicle width direction, the front side lever member and the rear side lever member pivot about the fulcrums respectively, whereby the support mechanisms regulate both the front bogie and the rear bogie inclining in the same vehicle width direction with respect to the carbody.

2. The carbody support device of claim 1 , wherein the front bogie and the rear bogie are indirect-mounting bogies, each having a bolster, and a secondary suspension between a bogie frame and the bolster, and

wherein each of the fulcrums of the front side lever member and the rear side lever member is supported by the carbody.

3. The carbody support device of claim 1 , wherein the front bogie and the rear bogie are direct mounting bogies, each having a bolster, and a secondary suspension between the carbody and the bolster, and each of the fulcrums of the front side lever member and the rear side lever member is supported by the bolster, and

the carbody support device further comprising an absorber mechanism provided between each of the other ends of the front side lever member and the rear side lever member, and the support member, for absorbing a vertical displacement between the bolster and the carbody.

4. The carbody support device of claim 1 , wherein the front bogie and the rear bogie are bolsterless bogies, and

the carbody support device further comprising:

a front side coupling support mechanism, in the front bogie side, coupling each of the one ends of the pair of front side lever members disposed on both sides in the vehicle width directions to the front bogie, for pivoting each of the front side lever members according to rolling of the front bogie; and

a rear side coupling support mechanism, in the rear bogie side, coupling each of the one ends of the pair of rear side lever members disposed on both sides in the vehicle width directions to the rear bogie, for pivoting each of the rear side lever members according to rolling of the rear bogie.

5. The carbody support device of claim 1 , wherein the support member is comprised of a single bar steel member.

6. The carbody support device of claim 1 , wherein the support member includes a front side hydraulic cylinder, a rear side hydraulic cylinder, and a confinement piping communicating between the hydraulic cylinders and confining incompressible fluid therein.

7. A railway vehicle comprising the carbody support device of claim 1 .