Thrust pad limiting structure

The utility model relates to a thrust pad limiting structure. Circular grooves are formed in the inner circular edge and the outer circular edge of a fan-shaped thrust pad respectively. A limiting screw is arranged at the semicircular groove of the inner circle of the thrust pad, and a limiting block is arranged at the concave circular groove of the outer circle of the thrust pad; small gaps are reserved between the limiting block and the thrust pad and between the limiting screw and the thrust pad, and a positioning pin is arranged on the lower portion of the limiting block to guarantee thatthe limiting block is positioned on the thrust seat. According to the utility model, the front and rear limiting structures which are convenient to disassemble and assemble are designed, the thrust pad can be directly disassembled and assembled only by lifting the thrust pad upwards by 10mm without disassembling the thrust pad and the runner plate during disassembly, and the complexity and time consumption of disassemblin