Cutter head structure of hard rock shield machine, used for mounting fixed hob with square bearing seats

Abstract

The invention discloses a cutter head structure of a hard rock shield machine, which is used for mounting a fixed hob with square bearing seats. The cutter head structure comprises the hob, a tool apron and cutter head brackets, wherein the tool apron is welded and mounted between a pair of corresponding cutter head brackets; rhombus-shaped grooves for fixing the hob are formed on the upper and the lower inner walls of the tool apron; openings communicated with the grooves are formed on the end surfaces on the upper and the lower inner walls of the tool apron; the square bearing seats, which are arranged at two ends of the hob, are fixed on the inner walls of the grooves through wedge blocks after being rotated with 45 DEG; the tool apron can have a single cavity, double cavities and four cavities; and the hob can have a single blade or double blades. The cutter head structure has the advantages that the structure is simple; the mounting and the disassembly are easy; the opening degree of the tool apron is reduced; the rigidity of the tool apron is enhanced; the rigidity of the hob is guaranteed; the cutter head structure can be used for replacing an advanced knife box in the same tool apron, so as to enhance the optimization of the design of a cutter head.

Description

technical field [0001] The invention relates to a cutter head structure of a shield machine, in particular to a hard rock shield machine cutter head structure equipped with a square shaft seat fixed hob. Background technique [0002] Shield machines are mainly used in tunnel construction. The working conditions of shield tunneling are generally harsh, and tool wear is inevitable. It is often necessary to replace the tools during the construction process. However, due to the limitations of the working environment and working principle of the shield machine, the There is a big risk in changing the tool in front of the shield machine cutter head. Due to the limitation of the structure and layout position of the hob, the hob tool holder is generally welded on the shield machine cutter head, making it extremely difficult to replace the hob before and after the cutter head. At the same time, due to the changing working conditions, sometimes it is necessary to replace the hob with ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a hard rock shield machine cutterhead structure with a fixed hob mounted on a square shaft seat, so as to solve the problems that the hob on the cutterhead is not easy to install firmly and is inconvenient to disassemble

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