Wheel-mounted brake disc of high-speed train

Abstract

The invention belongs to the technical field of train braking device, and particularly relates to a wheel-mounted braking disc of a high-speed train. The wheel-mounted braking disc of the high-speed train comprises an inner disc body and an outer disc body, and the inner disc body and the outer disc body are initially positioned through a positioning pin shaft and a wheel web; the sleeve hole of the inner disc body is provided with an inner splicing sleeve, the sleeve hole of the outer disc body is provided with an outer splicing sleeve, a pre-locking mechanism is arranged between the inner splicing sleeve and the outer splicing sleeve, and the inner disc body and the outer disc body are pre-locked through a pre-locking mechanism and the wheel web; the inner splicing sleeve and the outer splicing sleeve are correspondingly provided with bolt mounting holes, and the inner disc body and the outer disc body are final-locked through bolts and the wheel web. Compared with the traditional brake disc, the wheel-mounted braking disc of the high-speed train greatly reduces the risk of bolt breakage, and even if the bolt is broken, the splicing sleeve can still press the inner disc body andthe outer disc body on the wheel web, therefore, the reliability is higher.

Description

technical field [0001] The invention belongs to the technical field of train braking devices, and in particular relates to a high-speed train wheel-mounted brake disc. Background technique [0002] At present, domestic CRH series EMUs and "Fuxing" EMUs all adopt disc brakes, and all power trains are equipped with wheel-mounted brake discs. The existing EMU wheel-mounted brake disc is mainly composed of an inner disc body, an outer disc body, positioning pins and fasteners; the disc body is a ring with a heat dissipation rib structure and there are 6 There are 12 equicircumferentially distributed chutes near the middle; the positioning pin is a solid shaft, and the cylindrical surface at both ends of the cylindrical shaft is milled to a certain depth symmetrically in the axial direction. After milling, the two The plane and the center line of the cylinder are distributed symmetrically; on the wheel web in contact with the brake disc, 12 equicircumferentially distributed bolt...

AI Technical Summary

Problems solved by technology

When the groove depth reaches a certain level, the wheels and brake discs will be forcibly scrapped, which greatly increases the operation and maintenance cost of the EMU

In addition, the warping deformation of the disc body will stretch the bolts, and the bolts are subject to a large tensile stress, and the bolts are easy to break. Once the bolts break, the disc body will be separated from the wheel web, which may cause serious safety accidents

Images