Combination type slant wedge

Abstract

The invention discloses a combined tapered wedge used for a steering frame of a railway vehicle, which comprises a main body of a tapered wedge and a main friction board; the main body of the tapered wedge is a hollow prismoid; the body of the tapered wedge is provided with a vertical main friction surface and also provided with an inclined secondary friction surface; the main friction board is arranged on the main friction surface of the tapered wedge; the left side and the right side of the secondary friction surface are provided with a first assistant friction surface; the first assistant friction surface is coplanar with the secondary friction surface and extends to the two sides of the secondary friction surface. The two sides of the secondary friction surface are respectively and fixedly connected with the assistant friction surface which is coplanar with the secondary friction surface, therefore, the shearing moment of the steering frame for resisting diamond deformation is remarkably enlarged, thereby improving the anti-diamond rigidity of the steering frame. The combined tapered wedge can improve the critical velocity of the snakelike instability of the railway vehicle; the rail vehicle can obtain better running stability and digression safety.

Description

technical field [0001] The invention relates to the field of railway vehicle bogies, in particular to a combined wedge used on the railway vehicle bogies. Background technique [0002] The bogies for railway vehicles are equipped with wedges, which generate heat energy through the friction between the wedges and the side frames of the bogies, thereby releasing the vibration kinetic energy of the car body into the atmosphere. It can be seen that the wedges have the function of friction and vibration reduction. [0003] Usually, the existing railway vehicle bogie includes side frames, bolsters, wedges and bolster springs. The lower end of the bolster is assembled on the central frame of the side frames through the bolster springs, and the weight of the railway vehicle is applied to the side frames through the bolsters. on the shelf. The oblique wedge is a friction and vibration damping part. The cross section of the oblique wedge is wedge-shaped, with a vertical main friction...

AI Technical Summary

Problems solved by technology

[0007] On the other hand, although some vehicle bogies increase the anti-diamond stiffness of the bogie by widening the wedge, the material of the column wear plate on the side frame of the railway vehicle bogie is all metal materials, and the main friction surface of the wedge is also Metal materials are used, so the friction pair is greatly affected by the environment and the contact surface state of the two metals. On the one hand, the wedge damping device cannot perform the vibration damping function well due to the relatively large relative friction coefficient in the initial operation stage of the vehicle. On the other hand, with the operation of the railway vehicle, wear occurs between the main friction surface of the wedge and the wear plate of the column, which causes the relative friction coefficient between the main friction surface and the wear plate of the column to be too small, and gradually loses the damping function. The key parts of the vehicle are severely worn, reducing the service life