Wheel-mounted brake disc

Abstract

Two disc bodies are symmetrically arranged on the two sides of a wheel spoke plate, and a plurality of first bosses, a plurality of first inner periphery heat dissipation ribs and a plurality of first outer periphery heat dissipation ribs are arranged on the inner disc faces of the disc bodies at intervals. The at least one first inner peripheral radiating rib is connected with the outer peripheral face of one first boss and extends to the position close to the inner edge of the disc body in the radial direction of the disc body, and the at least one first outer peripheral radiating rib is connected with the outer peripheral face of one first boss and extends to the position close to the outer edge of the disc body in the radial direction of the disc body. The first bosses are connected with the wheel spoke plate through fastening bolts and attached to the wheel spoke plate, and thermal compensation spaces exist between the first inner periphery radiating ribs and the wheel spoke plate and between the first outer periphery radiating ribs and the wheel spoke plate. By arranging the thermal compensation space, the periphery of the first boss can deform towards the side close to the wheel spoke plate, and therefore the situation that the first boss deforms towards the side away from the wheel spoke plate, the fastening bolt is pulled, and the load of the fastening bolt is increased is avoided.

Description

technical field [0001] The present invention relates to the technical field of rail vehicle braking, in particular, to a wheel-mounted brake disc. Background technique [0002] The wheel-mounted brake disc of high-speed EMU is a key component of the train braking system, and its reliability directly affects the safety of train operation. During the braking process of a high-speed train, its kinetic energy is converted into heat energy through the friction between the brake disc and the brake pads. The brake disc bears a large thermal load, and the bolts on the brake disc will also generate additional thermal load. [0003] The wheel-mounted brake disc is mainly composed of a disc body, positioning pins, bolts, bolt sleeves, nuts, O-rings and other components. The two disc bodies are fastened on both sides of the spokes of the wheel by a certain number of bolts and nuts. A certain number of heat dissipation ribs are evenly distributed on the inner disk surface of the body. O...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wheel-mounted brake disc to solve the problem that the thermal deformation of the current wheel-mounted brake disc causes the boss of the bolt to arch toward the side away from the wheel web and pull the bolt, resulting in an increase in the load on the bolt. big technical problem

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