Brake disk constitution

A brake plate assembly is the one for braking high-speed and sub-high speed railway vehicle for solving the problems that the brake plate of current coach has thermal crack and is not wearable in running. The brake plate assembly is characterized in that it is consists of a plat hub, a connecting bolt, a friction ring, a square button, a pressure ring, an elastic pin, a nut, a check gasket, a gasket and a button; the friction ring is formed from a connecting structure of spaced arrangement of blade short radiating rib and blade long radiating rib; an elastic pin is installed in the plate hub, the connecting bolt is installed within the elastic pin, the friction ring is installed in the elastic pin; the square button and the pressure ring are sequentially installed on the elastic pin; the button is installed between the plate hub and the pressure ring; the gasket is installed on the connecting bolt; a check gasket is installed on every two connecting bolts; the nut is installed on the connecting bolt. The adva