JP2014168968A - Truck for railroad vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a truck for railroad vehicles which can reduce the manufacture cost and the inspection cost.SOLUTION: A side beam 10 which constitutes a truck frame consists of a side beam upper part 10a and a side beam lower plate 10b. The side beam upper part 10a is the part molded in an inverted U shape cross-sectional shape by press-forming a plate. On the other hand, the side beam lower plate 10b includes a shaft beam rubber receptacle 11 which is curvedly molded in a mode intersecting with the side beam lower plate 10b while extending integrally from the side beam lower plate 10b to both ends of the width direction (a sleeper direction 110) of the side beam lower plate 10b. After the bottom head of a vertical piece of the side beam upper part 10a is confronted to both ends of the width direction (the sleeper direction 110) of the side beam lower plate 10b, the side beam 10 is joined integrally in a welded part which is continuously welded. The apical portion of the shaft beam rubber receptacle 11 includes a screw seat 12 with which the connection part of the shaft beam type shaft box support device is fastened by a bolt.

Description

  The present invention relates to a railway vehicle carriage including a shaft beam type axle box support device.

  A railcar bogie is mainly composed of a bogie frame and a wheel shaft made up of wheels and an axle. The bogie frame is composed of two side beams spaced along the rail direction, and a horizontal beam provided along the sleeper direction and connecting the longitudinal center portions of the side beams. The shape when it is made has a substantially H-shaped form.

  A wheel shaft made up of a wheel and an axle is held in a shaft box that rotatably holds both ends thereof, and this shaft box is connected to a carriage frame via a shaft box support device. There are many types of axle box support devices that connect the axle box and the carriage frame, depending on the purpose, but the axial beam type axle box support devices that have a small number of parts and can be easily maintained are becoming mainstream.

  The shaft beam type shaft box support device includes a shaft beam provided along the longitudinal direction of the side beam, a shaft box holding portion that holds the shaft box at one end portion of the shaft beam, and a shaft beam holding device at the other end portion of the shaft beam. And a connecting portion connected to the side beam. A shaft beam rubber receiver to which the connecting portion is connected is provided on the lower surface of the side beam constituting the carriage frame.

  Generally, the axial beam rubber receiver provided on the side beam is manufactured integrally by casting, or manufactured by a welding combination combining sheet metal. These rubber bearings are attached to a predetermined position on the lower surface of the side beam by welding. Patent Document 1 discloses an example of a railcar bogie provided with a shaft beam rubber receiver on a lower surface of a side beam to which a shaft beam connecting portion of a shaft beam type axle box support device is connected by the method described above.

JP 2007-45275 A

  In general, the shaft beam rubber receiver disposed on the lower surface of the side beam forming the bogie frame has a longitudinal center portion of the side beam provided with an air spring and a longitudinal direction of the side beam acting on the vertical load of the axle box. It is provided on the lower surface of the side beam between the ends. The portion of the side beam (between the central portion and the end portion in the longitudinal direction of the side beam) where the shaft rubber support is provided is such that the weight of the vehicle body supported via the air spring is reduced by the wheel shaft that rolls on the track. Since it is located on the path transmitted to the supported axle box, high stress is likely to occur due to vibrations and the like accompanying the traveling of the railway vehicle.

  Since the shaft beam rubber receiver is joined to the lower surface of the side beam where this high stress tends to occur by welding, high weld quality is required for the welded portion of the shaft beam rubber receiver and the side beam. Furthermore, since the shaft beam rubber receiver itself may generate high stress, it is required that there is no casting defect when the shaft beam rubber receiver is constructed by casting. When configured, high welding quality is required. These requirements are factors that increase the overall manufacturing cost and inspection cost of the rubber bearing holder itself and the carriage frame.

  Therefore, in a bogie frame for a railway vehicle having a side beam provided with a shaft beam rubber receiver to which a shaft beam type shaft box support device is connected, a shaft beam rubber capable of withstanding high stress without increasing manufacturing costs and inspection costs. There is a problem to be solved in the structure of the bogie frame including the support.

  A railcar bogie according to the present invention includes a bogie frame having a spaced side beam, a lateral beam connecting the longitudinal center portions of the side beam, a wheel shaft including a wheel and an axle, and A railcar bogie having a shaft beam type axle box support device having a connecting portion for holding a wheel shaft rotatably and connecting to a lower surface of the side beam, wherein the side beam has a cross-sectional shape formed in a bowl shape. And a plate-like side beam lower plate that is integrally formed with a shaft beam rubber receiver that is bent and shaped to extend downward at both ends in the width direction and to which the connection portion is fixed. The above-mentioned problem is solved by a railcar bogie characterized by being provided.

  ADVANTAGE OF THE INVENTION According to this invention, the bogie for rail vehicles provided with the axial beam rubber receiver which can endure high stress can be provided, without making manufacturing cost large.

FIG. 1 is a plan view of a railcar bogie. FIG. 2 is a side view (view A-view A) of a bogie frame for a railway vehicle according to the present invention. FIG. 3 is an enlarged perspective view of a portion B in FIG. FIG. 4 is a perspective view showing the configuration of the side beam (corresponding to part B in FIG. 2).

Hereinafter, embodiments of a railway vehicle carriage according to the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a railcar bogie. A railcar bogie 1 includes a side beam 10 spaced along a rail direction 100, a lateral beam 20 connecting the longitudinal center portions of the side beam 10, a wheel shaft 25 that is a wheel and an axle, a rail vehicle It is comprised from the yaw damper 30 which suppresses the excessive turning motion in the horizontal surface of the trolley | bogie 1 for vehicles. The bogie frame shown in FIG. 1 is assembled by welding in such a manner that the lateral beam 20 penetrates the central portion of the side beam 10 in the longitudinal direction.

  FIG. 2 is a side view (view A-view A) of a bogie frame for a railway vehicle according to the present invention. The shaft beam type shaft box support device 40 is provided at one end of the shaft beam 44 disposed along the rail direction 100, and the shaft box holding device that rotatably holds the wheel shaft 25. 46 and a connecting portion 42 provided at the other end of the shaft beam 44 and connected to the shaft beam rubber receiver 11 provided in the side beam 10 described later.

3 is an enlarged perspective view of a portion B in FIG. 2, and FIG. 4 is a perspective view showing the configuration of the side beam (corresponding to the portion B in FIG. 2).
The side beam 10 constituting the carriage frame is composed of a side beam upper part 10a and a side beam lower plate 10b. The side beam upper portion 10a is a part formed by pressing a flat plate into a vertical cross-sectional shape such as a horizontal piece and a vertical piece extending downward from both ends of the horizontal piece. On the other hand, the side beam lower plate 10b is bent in such a manner that it extends integrally from the side beam lower plate 10b at both ends in the width direction (sleeper direction 110) of the side beam lower plate 10b and intersects the surface of the side beam lower plate 10b. A molded rubber beam receiver 11 is provided. The side beams 10 are joined together at a welded portion 50 that is continuously welded after the lower ends of the vertical pieces of the side beam upper portion 10a are butted against both ends of the side beam lower plate 10b in the width direction (the sleeper direction 110). Has been. A screw seat 12 to which a connecting portion 42 of a shaft beam type axle box support device 40 is fastened with a bolt is provided at the tip end portion of the shaft beam rubber receiver 11 extending downward from the side beam lower plate 10b of the side beam 10. Yes.

  By adopting the above-described configuration of the side beam 10, a conventional configuration in which a separate receiver (part corresponding to the shaft beam rubber receiver 11) manufactured by combining a casting or a plate is joined to the lower surface of the side beam 10 by welding. In contrast, the carriage according to the present invention has the shaft beam rubber receiver 11 extending from the side beam lower plate 10b and formed integrally with the side beam 10, so that the shaft beam rubber receiver 11 is connected to the side beam 10 by welding. Work and weld inspection can be eliminated.

Further, since the portion of the side beam 10 on which the axial beam rubber receiver is easily provided due to severe load conditions can be formed of the base material, a higher allowable stress is set as compared with the welded portion. Therefore, the safety factor can be increased.
Furthermore, compared to the conventional configuration in which the shaft beam rubber receiver 11 is manufactured by casting or is manufactured by welding by combining plate materials, the manufacturing cost and the inspection cost of the shaft beam rubber receiver 11 itself are reduced. Therefore, it is possible to provide a railway vehicle bogie that is totally safe and inexpensive to manufacture and inspect.

In addition, since the screw seat 12 is a separate component, it is possible to adjust the mounting position of the screw seat in the sleeper direction 110 according to the welding distortion state of the carriage frame, so that the screw seat positioning operation is facilitated. In addition, the welding of the screw seat can be easily automated, so that the railcar bogie with improved manufacturing and inspection workability can be provided.
FIGS. 1 to 4 show a configuration in which the side beam 10 constituting the carriage frame is welded and assembled by abutting the side beam upper portion 10a and the side beam 10b, but four side beams 10 are formed. The configuration of the present invention can also be applied to a four-sided structure in which these plate materials are combined.

DESCRIPTION OF SYMBOLS 1 ... Carriage 10 ... Side beam 10a ... Side beam upper part 10b ... Side beam lower board 11 ... Shaft beam rubber receiver 12 ... Screw seat 20 ... Cross beam 25 ... Wheel shaft 30 ... Yaw damper 40 ... Shaft beam type axle box support device 42 ... Connection part 44 ... Shaft beam 46 ... Shaft box holding part 50 ... Welding part 100 ... Rail direction (longitudinal direction)
110 ... Sleeper direction (width direction)

Claims (4)

A bogie frame having a spaced side beam and a lateral beam connecting the longitudinal center portions of the side beams, a wheel shaft made up of wheels and an axle, and the wheel shaft rotatably held In a railway vehicle carriage having a shaft beam type axle box support device provided with a connection portion connected to the lower surface of the side beam,
The side beams are
The upper part of the side beam with a cross-section shaped like a bowl,
It is composed of a plate-like side beam lower plate integrally formed with a shaft beam rubber receiver that is bent and molded in a manner extending downward at both ends in the width direction and to which the connecting portion is fixed. A rolling stock truck. In the railcar bogie described in claim 1,
An upper part of the side beam has a saddle-shaped cross section by press molding a plate material. In the railcar bogie described in claim 1,
The upper part of the side beam has a saddle-shaped cross section by combining a plurality of plate members. The railway vehicle carriage according to claim 1,
A railcar bogie characterized in that a screw seat to which the connecting portion is fixed is provided at the lower end portion of the shaft beam rubber receiver.

Images