Patent ID: 8720346
Filing Date: 2014-05-13
Classification: B61C,B61F

Abstract:
1. A bogie frame for railroad vehicle, wherein a single lateral beam placed to extend in a left-right direction along a rail-tie so that a motor and brakes are to be mounted on the lateral beam is joined to right and left side beams arranged to extend in a front-rear direction along a rail, the lateral beam includes right and left joining sections joined to the side beams by penetrating through the side beams and an intermediate section provided between the joining sections, each of the joining sections and the intermediate section having a flattened shape having a width in the front-rear direction larger than a thickness in a top-bottom direction, the intermediate section being formed with an oblong through hole at a center, each joining section has curved end faces located in the front-rear direction, and the intermediate section has flat end faces located in the front-rear direction and a flat wall defining the through hole, and the intermediate section is formed to be wider in the front-rear direction than the joining sections to avoid the necessity of adjusting a position of the motor in the front-rear direction with a bracket when the motor is to be mounted on the intermediate section and coupled to an axle through a gear unit, and the joining sections have a size in the left-right direction to allow mounting of the brakes inside the side beams.