Rubber pad for coil springs in series and method for adjusting stiffness thereof

Abstract

A rubber pad for coil springs in series comprises a metallic top plate, an elastic rubber body and a metallic base plate from top to bottom, wherein a metallic ring is fixed to the center of the top surface of the metallic top plate and is used for positioning the coil springs; the portion, connected to the elastic rubber body, of the bottom surface of the metallic top plate is an upper arc surface which is upwards concave; the portion, connected to the elastic rubber body, of the top surface of the metallic base plate is a lower arc surface which is upwards convex; the upper arc surface and the lower arc surface are coaxial arc surfaces arranged along the horizontal lengthwise direction of the rubber pad; the axial direction of the upper arc surface and the lower arc surface is in accordance with the horizontal widthwise direction of the rubber pad; and the perpendicular bisectors of the upper arc surface and the lower arc surface and the perpendicular bisector of the rubber pad coincide. The rubber pad for the coil springs in series of the invention is connected with the coil springs in series to form a composite spring system to meet the dynamics requirements of locomotive vehicles and prolong the service life of the coil springs. The invention also provides a method for adjusting the stiffness of the rubber pad for the coil springs in series.

Description

technical field [0001] The invention relates to a rubber-metal composite shock-absorbing element, in particular to a rubber pad for series-connected helical springs, which is applied to a secondary suspension system of a railway locomotive vehicle bogie. The invention also relates to a method for adjusting the stiffness of the rubber pad used for the serial coil spring. Background technique [0002] Rubber pad is a commonly used rubber-metal composite damping element, which can be widely used in various damping places, especially in the bogie of railway rolling stock. Taking the secondary suspension system of railway rolling stock bogie as an example, with the increase of the running speed of passenger and freight trains, more and more secondary suspension systems adopt the structure of steel helical springs in series with rubber pads at one end, as shown in the attached figure 1 shown. The vertical, horizontal, and longitudinal stiffness values ​​of the composite spring s...

AI Technical Summary

Problems solved by technology

[0007] The present invention is aimed at the rubber pads used for series-connected coil springs in the prior art. The deflection stiffness is too large, the deflection deformation capacity is insufficient, and the horizontal and transverse stiffnesses are the same as the horizontal and longitudinal stiffnesses, which cannot meet the dynamic needs of locomotives and cause the service life of the coil springs to be limited. The technical problem of shortening is to provide a rubber pad for series coil springs that meets the dynamic needs of rolling stock and can prolong the service life of the coil springs

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