Tilting bolster and secondary suspension comprising same

Abstract

The present invention relates to a tilting bolster for suspension of a vehicle, to firstly ensure absorption of vertical load that is generated by the vehicle body and then to allow the tiling operation along with relative horizontal movements. The bolster comprises a first support member that is mounted on the vehicle and a second support member that is vertically spaced from the first support member so as to receive an end of a suspension spring. The invention is characterized in that the bolster also comprises a central vertical guiding pivot (50) comprising a cylindrical or truncated elastic element (53) assembled between an internal part (51) and an external part (52); the internal part (51) is integrated with one of the first support member (70) and the second support member (71), and the external part is integrated with the other one of the first support member (70) and the second support member (71); the horizontal stiffness of the pivot (50) is greater than the vertical stiffness; the bolster also comprises at least one pair of elastic bolts (60) which are symmetrically disposed at two ends of the central pivot; centers of the bolts are located on a first horizontal shaft; and the bolts are installed between the first support member (70) and the second support member (71) are have high vertical stiffness relative to the horizontal stiffness thereof.

Description

technical field [0001] The invention relates to an inclined bolster and a secondary suspension including the bolster. Background technique [0002] Bolsters are known which are used in the secondary suspension of railway vehicles, such as freight cars, passenger cars or locomotives, to ensure the suspension of the vehicle body relative to the chassis, wherein the axle-wheel assemblies are suspended by the primary mounted on the chassis. [0003] For a bogie comprising, for example, two axles and four wheels (or, for example, comprising three axles), it is known to provide two or four secondary suspension subassemblies, each secondary suspension subassembly having a A bolster or a pair of bolsters, and one or more metal springs arranged in series with the bolster or between the bolsters, the function of the metal springs is to obtain the vertical flexibility required for the secondary suspension. [0004] There are several types of bolsters designed for such applications, b...

AI Technical Summary

Problems solved by technology

The device does not improve the characteristics according to the horizontal

[0010] Furthermore, laminated frusto-conical springs may have problems ensuring substantial vertical clearance, as well as ensuring vertical stiffness independent of load level (for such components, the axial force versus axial displacement characteristic tends to be non-linear), In addition to this, there is the problem of heaving and therefore of adjustment to ensure the height of the floor relative to the platform over a period of time

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