Conical crushing board and spindle mounting arrangement for a cone crusher

A conical crushing board and spindle mounting arrangement comprised of a spindle, a cone fixedly mounted on said spindle, a conical crushing board mounted on said cone, a conical locating member mounted on said conical crushing board around said spindle, a lock nut fastened to said spindle to hold down said conical locating member and said conical crushing board, and a plurality of keys connected between said lock nut and said conical locating member, wherein:

• said conical crushing board comprises a series of sloping teeth formed integral with the topmost edge thereof, the sloping teeth of said conical crushing board sloping in one direction and connected one after another;
• said conical locating member is comprised of four arched blocks abutted against one another, having a plurality of sloping teeth equiangularly spaced at a bottom side thereof and engaged with the sloping teeth of said conical crushing board, a plurality of locating notches equiangularly spaced at a top side thereof, and a thin wall portion for cutting with a cutting torch when replacing said conical crushing board with a new conical brushing board;
• said lock nut comprises a plurality of radial locating grooves equiangularly spaced around the periphery thereof and extended to top and bottom sides thereof corresponding to the locating notches at said conical locating member;
• said keys are respectively inserted into the radial locating grooves at said lock nut, and partially engaged into the locating notches at said conical locating member.