Monoblock cast framework for metro bogie with axle box arranged inside

Abstract

The invention discloses a monoblock cast framework for a metro bogie with an axle box arranged inside and belongs to the field of framework devices for rail vehicle bogies. The monoblock cast framework comprises a crossbeam unit and two side beam units, the side beam units are parallelly and symmetrically arranged on two sides of the crossbeam unit, and the crossbeam unit and the side beam units are integrally formed through a casting process. The number of weld joints is reduced substantially, and overall structural strength and fatigue strength of the framework are improved. Minimum curve passing radius of the train bogie using the framework is reduced to at least 36m, and turning maneuverability and flexibility of the new bogie are improved substantially; a side beam gearbox hanging seat is arranged on each side beam unit, a gearbox hanging rod can be ensured to be close to a gearbox shaft to greatest extent, and coupling displacement quantity is reduced, so that occupied space of adriving device is reduced. In addition, by the structure, long-cantilever structure of the gearbox hanging seat can be avoided to overcome the defect that existing long-cantilever structure is low infatigue strength and short in service life.

Description

technical field [0001] The invention belongs to the field of frame devices for rail vehicle bogies, and in particular relates to an integral casting frame for a built-in subway bogie in an axle box. Background technique [0002] The frame of the existing railway vehicle bogie is usually an axle box external bogie, such as Figure 1 to Figure 3 As shown, the common bogie with external axle box is a welded frame approximately H-shaped. Formed H-shaped structure, each beam 1 includes two seamless steel pipes 1-1, gear box hanger 1-2, motor hanger 1-3 and a set of traction rod seats 1-4, two seamless steel pipes 1-1 are parallel to each other, and the distance between them is bridged and fixed by two parallel longitudinal beams 2 respectively. The gear box hanger 1-2 and the motor hanger 1-3 are located on the outside of the beam 1, and a set of traction rod base 1-4 is fixedly connected above the middle section of the beam 1 and located on the gear box hanger 1-2 and the motor...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the old H-shaped welded frame with external axle box can only meet the assessment parameters of not exceeding 100% of the yield strength of the material under the impact load of 20g, the traditional frame structure with external axle box makes it in terms of strength, weight and minimum The technical indicators such as the curve radius cannot meet the technical problems of the design requirements of the new subway project at the same time. The present invention provides an integral casting frame for the axle box built-in subway bogie

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