Trailer bogie framework for standard EMU (Electric Multiple Units)

Abstract

The invention discloses a trailer bogie framework for a standard EMU (Electric Multiple Units). The trailer bogie framework is characterized in that a main body is composed of two side beams and a transverse beam; the body of each of the side beams and the transverse beam is of a box-type welding structure; the side beams and the transverse beam are respectively welded with various types of installation seats; a longitudinal beam is designed at the transverse beam position; braking beams are connected with the transverse beam in a box-type transition manner; meanwhile the box-type structures of the braking beams are also longitudinally connected, so that a dual-longitudinal-beam structure is formed in the transverse beam position. According to the trailer bogie framework for the standard EMU, the box-type structure of a connection region is formed by an upper cover plate of the transverse beam, inner vertical plates of the braking beams, outer vertical plates of the braking beams and upper cover plates of the braking beams, so that the transition connection between the transverse beam and the braking beams is realized, therefore the loaded cross section of the connection region is increased, the stress level of the connection region is improved, and the reliability of the region is improved. Meanwhile, the inner vertical plate of each braking beam is designed to be of an integral structure, and is longitudinally connected with the corresponding braking beam at the rear side, so that an upper longitudinal beam is formed, and torsional moment formed by braking forces of a front shaft and a rear shaft can be absorbed in the upper longitudinal beam, therefore the torsional working condition of the body of the transverse beam is reduced, and the stress state of the connection region between the transverse beam and transverse side beams is also improved. Meanwhile, the geometric cross section of the transverse beam is increased through the formed dual-longitudinal-beam structure, so that the whole strength of the transverse beam is improved.

Description

technical field [0001] The invention relates to a trailer frame, in particular to an improved low-stress EMU trailer bogie frame. Background technique [0002] The EMU trailer bogie frame is mainly composed of two symmetrical side beams and a cross beam in the middle of the two side beams; in addition, the traction seat, brake mounting seat and other functional parts are welded to meet the requirements of wheel set composition, Installation of bogie system components such as primary suspension, secondary suspension, foundation brake and other auxiliary devices and transmission of force and moment. [0003] The main structure of the existing high-speed EMU trailer bogie frame is the same as above. The beam is a round steel pipe or a box-shaped welded structure, the side beam is a box-shaped welded structure, and various functional mounts are welded on the beam or side beam. The structure is relatively simple, the space is sufficient, the weight is light, and the manufacturab...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-stress high-speed EMU trailer bogie frame, which mainly solves the problem of excessive stress in the connection area between the brake mounting seat and the beam, thereby improving the overall fatigue resistance and safety of the trailer frame

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