Single-stage suspension system and axle box built-in high-speed motor train unit non-power bogie

Abstract

The invention discloses a primary suspension system and an axle box built-in type non-power bogie of a high-speed motor train unit with the primary suspension system, and belongs to the technical field of bogies of rail transit vehicles. The axle box body is erected between a framework and an axle, the primary suspension spring is arranged between the axle box body and the framework, and the primary suspension spring comprises two glass fiber springs which are symmetrically arranged and a laminated spring which is arranged at the lower parts of the glass fiber springs and is used for being connected with the axle box body; wherein a deformation space is formed between the two glass fiber springs, rubber inserting devices are arranged at the two ends of each glass fiber spring, and the two glass fiber springs are connected through the rubber inserting devices in a hinged mode so that the two glass fiber springs can synchronously release longitudinal displacement. The lightweight design requirement of the framework is met, the transverse occupied space can be reduced, and meanwhile the high-speed application requirement of the motor train unit is met.

Description

technical field [0001] The invention relates to the technical field of rail transit vehicle bogies, in particular to a primary suspension system and a non-power bogie of a high-speed EMU built in an axle box with the primary suspension system. Background technique [0002] The primary suspension of the traditional high-speed EMU bogie adopts a steel spring structure, which is located on the outside of the wheel together with the axle box. The axle box is set on the journal to form a part connecting the wheel set and the bogie. Realize the weight bearing and transmission of the car body to the wheel set, and turn the sliding friction into rolling, so as to realize the translation of the car body; [0003] For the existing railways in some parts of the world, the lines are complex and the vehicle limits are small. If the high-speed EMUs want to pass through such lines, they must meet the small limit requirements. However, the external axle box makes the transverse dimension of...

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Problems solved by technology

[0003] For the existing railways in some parts of the world, the lines are complex and the vehicle limits are small. If the high-speed EMUs want to pass through such lines, they must meet the small limit requirements. However, the external axle box makes the transverse dimension of the wheelset no longer Reduce space; at the same time, the exposed axle box, axle temperature, speed sensor and other devices need to face harsh conditions such as high-speed flying rocks, ice and snow hits, etc., and it is necessary to add protective covers and other devices. This method also provides daily inspections for EMUs It is inconvenient, but if the axle boxes are built in, the span between the two axle boxes will be reduced, and if the primary suspension system meets the roll stiffness constant, the vertical stiffness must be increased to 300% of the external solution. The spiral steel spring structure will take up more lateral space of the system. At the same time, the bearings, dust-proof retaining rings, bearing glands, axle box covers and other components in the axle box of the high-speed EMU bogie do not meet the requirements of the axle box built-in bogie. installation space requirements;

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