Stiffness adjustment method and structure of a primary suspension device

Abstract

Provided are a rigidity adjusting method and structure for conical springs of a primary suspension device. The primary suspension device comprises a base, conical springs and limiting stoppers. Each conical spring comprises a rubber body and a mandrel. Stopping holes are formed in the lower end of a bogie, and the upper ends of the mandrels are installed in the stopping holes of the bogie. Cavities are formed in the rubber bodies and the mandrels. The two conical springs are arranged in the base side by side in the longitudinal direction, one limiting stopper is arranged in a cavity of each conical spring, and the lower end of each limiting stopper is connected with the base. An axle box is provided with an axle box seat, and the base is installed in the axle box seat. When the bogie movesrelative to the axle box in the vertical direction and the lower ends of the mandrels abut against the limiting stoppers, the primary suspension device can generate variable rigidity in the verticaldirection. According to the invention, the capacity of a vehicle for passing through a small-curvature-radius curve can be remarkably improved, the primary suspension space is greatly saved, and the weight of the bogie is reduced.

Description

technical field [0001] The invention relates to the field of rail vehicles, in particular to a stiffness adjustment method and structure of a primary suspension device. Background technique [0002] The axlebox built-in bogie is a railway vehicle bogie with the axlebox placed inside the wheel set. This type of bogie effectively reduces the size of the frame space. The minimum curve passing radius of this type of bogie is significantly smaller than that of ordinary bogies. The turning maneuverability and flexibility of this type of bogie are greatly improved. In addition, this type of bogie also satisfies the lightweight design requirements of the bogie to the greatest extent. In order to adapt to the mountainous and curved geographical environment of some European countries, the vehicle often needs to make small turns during driving, which requires the vehicle to have a strong ability to pass through a small radius of curvature. [0003] However, the existing primary suspe...

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Problems solved by technology

[0003] However, the existing primary suspension devices are all arranged on both sides of the axle box. When the vehicle turns with a small curvature, the rotation angle of the bogie will be restricted by the primary suspension devices on both sides of the axle box, so it is difficult to adapt to multiple The geographical environment of some European countries with mountains and many curves

[0004] If the existing conical springs are directly arranged above the axle box, although small curvature turning can be well realized, but because the space above the axle box is extremely limited, especially the space in the lateral direction is very tight, the primary suspension device realizes Various complex technical requirements are difficult

The stiffness of the conical spring in the vertical, horizontal, and longitudinal directions will be too small, and it is difficult to meet the actual requirements for the stiffness of the vehicle, and there will be safety hazards in the vehicle.

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