There is provided an underfloor duct which enables inspection of electric equipment to be easily performed, has a simple structure, and hardly allows water to intrude into a duct passage. An underfloor duct according to an aspect of the present invention is an underfloor duct, provided under a floor of a railcar, for storing electric equipment including a cable. The underfloor duct includes: a box having a frame that projects upward, and an opening that opens downward; and a lid that closes the opening and forms a duct passage between the lid and the box. An end portion of the box is located outside an end portion of the lid in a car width direction.

The present invention concerns a railway power car comprising: A body (12) extending in a longitudinal direction (X) and defining a technical room (22); and cabinets (15) accommodated in the technical room. The power car comprises at least two rails (28) disposed on the floor, each of said rails extending in the longitudinal direction, an upper part (42) of each of said rails forming a first means of joining with a cabinet; each cabinet comprises at least one foot (56), said or each foot comprising a second means of joining (60, 62) capable of mating with the first means of joining of one of said rails, each first means of joining and each second means of joining being configured so that each cabinet can be fastened to said corresponding rail at an infinite number of positions along said rail.

The present invention concerns a railway power car comprising: A body (12) extending in a longitudinal direction (X) and defining a technical room (22); and cabinets (15) accommodated in the technical room. The power car comprises at least two rails (28) disposed on the floor, each of said rails extending in the longitudinal direction, an upper part (42) of each of said rails forming a first means of joining with a cabinet; each cabinet comprises at least one foot (56), said or each foot comprising a second means of joining (60, 62) capable of mating with the first means of joining of one of said rails, each first means of joining and each second means of joining being configured so that each cabinet can be fastened to said corresponding rail at an infinite number of positions along said rail.

The present disclosure discloses a rail vehicle. The rail vehicle includes: a plurality of bogies, where the bogie has a straddle recess suitable for straddling a rail; and a vehicle body, where the vehicle body is connected to the plurality of bogies and pulled by the plurality of bogies to travel along the rail, and the vehicle body includes a plurality of compartments hinged sequentially along a length direction of the rail; the plurality of compartments forms at least one compartment group, the compartment group includes three compartments hinged sequentially, and the bottom of each of only compartments that are located at two ends of the compartment group and that are of the three compartments is connected to the bogie; and in the length direction of the rail, a surface that is of a compartment at at least one end of the vehicle body and that faces away from an adjacent compartment is provided with an escape door that can be opened and closed. The rail vehicle according to this embodiment of the present disclosure facilitates optimization of the structure of an escape passage, reduction in occupied space and the weight borne by the rail, and improvement in stability, and is flexible in steering and low in costs.

The present invention addresses the problem of providing a method for molding, using a honeycomb core, a composite material structure that is high-quality, low cost, and leaves less voids. The present disclosure addresses the problem of providing a method for molding, using a honeycomb core, a composite material structure with which it is possible to reduce dimples in a composite material skin at low cost. According to a method for molding a composite material structure of the present disclosure, an uncured composite material honeycomb sandwich panel in which prepreg is laminated on upper and lower surfaces of a honeycomb core via an adhesive is covered with a vacuum bag and placed in an autoclave. After that, the vacuum bag is evacuated and, while the evacuation is being continued, is heated and pressurized by the autoclave to cure a matrix resin of the prepreg and achieve adhesion to the honeycomb core.

Some embodiments of the present disclosure provide a chassis component of a railway vehicle, and a railway vehicle. The chassis component includes two lower boundary beams provided at an interval and a sleeper beam provided between the two lower boundary beams. The sleeper beam includes: a web structure; a center pin, connected with a bogie of a railway vehicle; and a mounting frame, connected with the web structure, the center pin being provided on the mounting frame, the mounting frame including a plurality of vertical plates, and the plurality of vertical plates being provided at an interval along an outer wall surface of the center pin. The technical solution of the present disclosure can solve the problem in the related art of insufficient connecting strength of a center pin and a web structure of a sleeper beam.

Some embodiments of the present disclosure provide a chassis component of a railway vehicle, and a railway vehicle. The chassis component includes two lower boundary beams provided at an interval and a sleeper beam provided between the two lower boundary beams. The sleeper beam includes: a web structure; a center pin, connected with a bogie of a railway vehicle; and a mounting frame, connected with the web structure, the center pin being provided on the mounting frame, the mounting frame including a plurality of vertical plates, and the plurality of vertical plates being provided at an interval along an outer wall surface of the center pin. The technical solution of the present disclosure can solve the problem in the related art of insufficient connecting strength of a center pin and a web structure of a sleeper beam.

According to some embodiments, a railcar comprises at least two hoppers for transporting a commodity. Each hopper comprises a pair of side walls and a floor. The railcar further comprises a composite partition separating the hoppers. The composite partition comprises a frame comprising a first material coupled to the pair of side walls and the floor at a location separating hoppers. The frame comprises a center opening. The frame is configured to provide structural support for structural loads exerted on the pair of side walls and the floor. The composite partition further comprises a composite section comprising a second material coupled to the frame and covering the central opening of the frame. The composite section is configured to withstand loads exerted on the composite section by the commodity transported in the hoppers.

According to some embodiments, a railcar comprises at least two hoppers for transporting a commodity. Each hopper comprises a pair of side walls and a floor. The railcar further comprises a composite partition separating the hoppers. The composite partition comprises a frame comprising a first material coupled to the pair of side walls and the floor at a location separating hoppers. The frame comprises a center opening. The frame is configured to provide structural support for structural loads exerted on the pair of side walls and the floor. The composite partition further comprises a composite section comprising a second material coupled to the frame and covering the central opening of the frame. The composite section is configured to withstand loads exerted on the composite section by the commodity transported in the hoppers.

A floor structure of a rail vehicle car body includes a supporting structure having a left and a right longitudinal beams and a plurality of transverse structural members using a low-heat welding process. A floor panel is directly and releasably attached atop the supporting structure using and a plurality of non-permanent, pressure interlocking fasteners.