Damping device for elastic connection of oblique wedge and bolster for railway freight car bogie and bogie

Abstract

The invention discloses a vibration damping device for elastically connecting a wedge and a bolster for a railway freight car bogie and the bogie, which solves the existing vertical vibration and lateral vibration at the main friction surface in the prior art, and makes the bogie resistant to rhombus deformation. The problem of low height and weak control ability between the bolster and the side frame has the beneficial effect of effectively improving the lateral performance of the bogie and improving the anti-rhombic deformation ability of the bogie. The elastic connection damping device includes a bolster, a side frame and an oblique wedge. The bolster is connected between the two side frames. The bolster is provided with an oblique wedge at the position where the side frame is set, and the oblique wedge is arranged between the bolster and the side frame. Between the wedge and the inner side of the side frame are connected by a mortise and tenon structure so that the wedge can only move vertically, elastic pieces are arranged between the two sides of the wedge and the bolster, and the elastic piece is in contact with the wedge and the bolster respectively, and the wedge is in contact with the bolster respectively. A shock-absorbing spring is provided on the bottom side of the bolster and the bolster.

Description

technical field [0001] The invention relates to the field of railway freight cars, in particular to a vibration damping device for elastically connecting a wedge and a bolster for a railway freight car bogie and the bogie. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The wedge is a vibration damping device commonly used in the three major bogies of railway freight cars, and it is one of the core stress-bearing components to ensure the running performance of the vehicle. The main function of the wedge damping device for the three bogies of railway freight cars is to reduce the vertical and lateral vibrations between the bolster and the side frame, strengthen the connection between the bolster and the side frame, and suppress the rhombic deformation of the bogie to improve the alignment ability. [0004] Such as figure 1 shown. The exi...

AI Technical Summary

Problems solved by technology

[0008] The main shortcomings of the existing oblique wedge damping device are: first, the friction at the main friction surface attenuates both vertical vibration and lateral vibration, making it difficult to choose the relative friction coefficient; second, the friction between the bolster and the side frame The lateral restraint between the two sides is mainly controlled by the lateral friction force at the main friction surface, and the control ability is relatively weak. With the increase of wear at the contact surface of the wedge, bolster, and side frame, the control ability will decrease sharply; third, the bogie resists rhomboid deformation The capacity is mainly controlled by the lateral friction force at the main friction surface. With the increase of wear at the contact surface of the wedge, bolster, and side frame, the anti-rhombic deformation capacity of the bogie will decrease sharply, and the critical speed of the vehicle will decrease; fourthly, with The friction at the contact surfaces of the wedge, the bolster and the side frame increases, the lateral and longitudinal friction forces at the main friction surface will decrease significantly, and the control ability between the bolster and the side frame is weakened

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