Railcar bogie

A railcar bogie comprising:

• a bogie frame including a cross beam supporting a carbody of a railcar;
• a pair of axles respectively arranged at both sides of the cross beam in a car longitudinal direction and extending in a car width direction;
• bearings provided at both car width direction sides of each of the axles and rotatably supporting the axles;
• axle boxes respectively accommodating the bearings;
• and
• axle beam coupling devices coupling the axle boxes and the bogie frame to one another,
• each of the axle beam coupling devices including
• an axle beam projecting from the axle box to the bogie frame and extending in the car longitudinal direction,
• a receiving seat unit projecting from the bogie frame to the axle beam and extending in the car longitudinal direction, and
• a coupling portion coupling the axle beam and the receiving seat unit to each other, and
• the receiving seat unit being formed separately from the bogie frame and positioned by contacting the bogie frame.